• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A small generator (4) comprises a rotor (41) having a plurality p of permanent magnets (412) and fixed to a rotating body; a coil (422) wound around an axis of the rotary body in a cylindrical shape; and a magnetic path forming section (43) having a first magnetic pole section (431) and a second magnetic pole section (432) disposed opposite to each other at a predetermined interval on both sides in a magnetic pole direction of the permanent magnet (412) of the rotor (41), and a connecting portion (439) passing through the inside of the coil (422) and connecting the first magnetic pole portion (431) and the second magnetic pole portion (432). Then, the rotor (41) is arranged such that each magnetic pole direction of a plurality of the permanent magnets (412) is alternated in the circumferential direction. The spool (422) is wound around a bobbin (421) fixedly positioned at a predetermined interval in the axial direction with respect to the rotor (41), and the first magnetic pole portion (431) and the second magnetic pole portion (432) of the Magnetic path forming section (43) are configured such that p / 2 magnetic pole gear teeth (436) disposed opposite to each other by clamping the rotor (41) are arranged at equal intervals in the circumferential direction.
    公开号:AT512632A2
    申请号:T125/2013
    申请日:2013-02-18
    公开日:2013-09-15
    发明作者:Yoshibumi Nakamura；Shinji Kinoshita
    申请人:Nakanishi Inc；Seiko Instr Inc；
    IPC主号:
    专利说明:

    n
    The present invention relates to a small generator, for example, a small generator using a permanent magnet, which is installed on an axle of a bicycle, a rotary shaft of a dental handpiece, or the like.
    Small generators are used in an axle on a bicycle, a dental handpiece or the like.
    For example, there is the small generator installed inside a hub of a bicycle wheel. Such a generator realizes low weight and compactness, but in contrast, it is necessary to achieve a high voltage without overdriving. The following patents have been disclosed. JP-UM-A-6-75978 discloses a small generator provided with a yoke and a permanent magnet provided on the inner circumference of a wheel-side rotor, with a claw-pole type iron core (iron core whose claw-shaped magnetic pole piece is set) Wheel-side stator is provided, and is configured with a coil which is adapted over the iron core.
    In addition, JP-UM-A-64-48386 discloses a small generator configured such that a plurality of permanent magnets magnetized in the axial direction are arranged in a wheel rotor so that their magnetic poles alternate in the circumferential direction, and the an equal number of magnetic flux collecting parts such as the number of permanent magnets and coils wound around the magnetic flux collecting parts, provided in an axis stator as an annular member, and pressing the annular member onto the permanent magnets.
    The small generator disclosed in JP-UM-A 6-75978 has a structure in which the yoke and the permanent magnets rotate around the stator. Since the magnets can easily be multi-pole, there is an advantage that a high voltage can be easily achieved even at low speeds.
    However, since the yoke and the permanent magnets are disposed outside the stator, the generator has a large diameter and thus can not be sufficiently miniaturized or sufficiently made lightweight.
    Moreover, it is necessary to control such dimensions as the execution of bending angle or curvature of the claw pole core, and it is also difficult to reduce a gap between the permanent magnet and the iron core due to variations in the dimensions of the respective iron cores. Therefore, the larger the gap becomes, the larger must be the permanent magnets ..... ".
    On the other hand, in JP-UM-A-64-48386, the small-sized generator has an advantage in that, since the stator coil and the permanent magnet of the rotor are arranged in the axial direction, a small diameter compared to JP-UM. A-6-75978 can be achieved and the gap between the magnetic pole pieces and the permanent magnets can be narrowed.
    However, a large number of required coils result in increased costs and the workability is poor, since the processing work for connecting leads corresponding to the number of coils is required.
    Moreover, in both disclosures, the small generators are configured with the same pitch, so that the number of magnetic poles of the permanent magnets is equal to the number of magnetic pole pieces of the stator. Accordingly, although a high voltage can be obtained, there is a problem that a good concentricity due to the large cogging torque can not be achieved.
    A solution for the cogging torque is urgently required, not only for small generators that are installed in the hub of a bicycle, but also for the dental handpieces.
    Furthermore, with respect to the small generator in both disclosures, there is a problem that even when light is not necessary (during light-off), since the magnetic flux of the permanent magnet flows, so as to contact the coil of an iron core of the magnetic Pols to connect to the other iron cores of the magnetic poles, large iron losses occur and thereby the rotation of the wheel even in a state in which - no current - by the coil means, 'is disturbed.
    The present invention is based on the object to provide a small-sized generator which can secure a high voltage and which is further miniaturized and lighter.
    This object is achieved according to the invention with a generator having the features of claim 1.
    Preferred and advantageous embodiments are subject of the dependent claims. (1) According to a first aspect of the invention, a small generator comprises a rotor having a plurality p of permanent magnets and on a rotating body
    II »is attached; a coil wound around an axis of the rotary body in a cylindrical shape; and a magnetic path forming portion having a first magnetic pole portion and a second magnetic pole portion disposed opposite to each other at a predetermined interval on both sides in a magnetic pole direction of the permanent magnet of the rotor, and a connecting portion passing through the inside of the coil and the first magnetic pole portion and second magnetic pole section connects. Then, the rotor is arranged so that each magnetic pole direction of a plurality of the permanent magnets alternately changes in the circumferential direction. The coil is fixedly disposed at a predetermined interval in the axial direction with respect to the rotor, and the first magnetic pole portion and the second magnetic pole portion of the magnetic path forming portion are configured such that p / 2 magnetic pole gear teeth opposing each other by crimping of the rotor are arranged at equal intervals in the circumferential direction. {2} According to a second aspect of the invention, the small generator according to the first aspect further comprises
    Magnetic pole rotation means for rotating each of the first magnetic pole portion and the second magnetic pole portion by only an angle of 2n RAD / p in the circumferential direction with respect to the other. (3) According to a third aspect of the invention, there is provided a small generator where the small generator according to the first aspect or the second aspect constitutes a single generator unit and where the single generator unit is arranged plural times in parallel in the axial direction of the rotating body. • · · · ···· * · ♦ * * ·
    (4) According to a fourth aspect of the invention, there is provided the small generator according to the third aspect, where two of the individual generator units are provided and where both are in a state of being in contact with each other, both of the individual generator units being arranged are that the coil direction of the rotor in the axial direction in the same direction or in the opposite direction, wherein the magnetic pole of the permanent magnet of a rotor is arranged in the opposite direction to the magnetic pole of the permanent magnet of the other rotor and wherein the one coil and the other coil are wound in the opposite direction to each other. (5) According to a fifth aspect of the invention, there is provided the small generator according to the third aspect or the fourth aspect, wherein a cogging torque generated by a single generator unit and the cogging torque generated by the other single generator unit are provided are 180 degrees out of phase, a positional relationship between an imaginary line Av passing through the middle of the first magnetic pole portion and the center of the magnetic pole tooth of the second magnetic pole portion in a single generator unit and which is parallel to the axis, and an imaginary line B, passes through the center of the first magnetic pole portion and the center of the magnetic pole tooth of the second magnetic pole portion in the other single generator unit and which is parallel to the axis, or a positional relationship between an imaginary line C in a magnetic pole direction of the permanent magnet in the one single genera gate unit and an imaginary line D in the magnetic pole direction of the permanent magnet in the other individual generator unit is set as shifted only by an angle of π RAD / p in the circumferential direction.
    According to the present invention, a coil wound around an axis of a rotating body in a cylindrical shape is fixedly positioned at a predetermined interval in the axial direction with respect to a rotor having a plurality p of permanent magnets and fixed rotating ones Body is attached. Therefore, it is possible to provide a small generator which is miniaturized and lightweight while securing a high voltage.
    Further details, features and advantages of the invention will become apparent from the following description with reference to the accompanying drawings, in which preferred embodiments are shown. It shows:
    Fig. 1 is a cross-sectional view in a case where a small generator according to a first embodiment is arranged in a hub of a bicycle.
    Fig. 2 is an exploded perspective view of the small gene rat © - r - according to the first embodiment.
    FIGS. 3A and 3B are explanatory views illustrating a magnetized state in power generation using the small-sized generator according to the first embodiment.
    4 is a cross-sectional view of a small generator according to a second embodiment;
    FIG. 5 is a cross-sectional view of a small generator according to a third embodiment. FIG.
    6 is a cross-sectional view of a small generator according to a fourth embodiment. «M« m · * · ι • · · ·
    • * * * * Λ 9 »♦ ·« «··· · φ
    Fig. 7 is an exploded perspective view of a rotor and a magnetic pole portion in two small generators.
    Fig. 8 is an explanatory view illustrating cogging torques generated by a first generator unit and a second generator unit.
    9 is a cross-sectional view of a small-sized generator according to a sixth embodiment.
    10 is a cross-sectional view illustrating a state where a small-sized generator is installed in a dental handpiece.
    11 is a cross-sectional view of a small-sized generator according to a seventh embodiment. (1) short-darstellu-n-g ^ -de-r execution form -------------
    A small generator includes a rotor 41 having a plurality p of permanent magnets 412 and fixed to a rotating body (hub main body 31 and rotating shaft 6), a spool 422 wound around an axis of the rotating bodies 31 and 6 in a cylindrical shape and a magnetic path forming section 43 having a first magnetic pole section 431 and a second magnetic pole section 434 disposed opposite to each other at a predetermined pitch on both sides in a magnetic pole direction of the permanent magnet 412 of the rotor 41, and having a connecting section passing through the Inside the coil 422 and passes the first *.
    Magnetic pole section 431 and the second magnetic pole section 434 connects.
    Then, the rotor 41 is arranged so that each magnetic pole direction of a plurality of permanent magnets 412 alternately circumferentially.
    The coil 422 is wound around a bobbin 421 which is fixedly positioned at a predetermined interval in the axial direction with respect to the rotor 41.
    The first magnetic pole section 431 and the second magnetic pole section 434 of the magnetic path forming section 43 are configured so that p / 2 magnetic pole gear teeth 433 and 436 disposed opposite to each other by clamping the rotor 41 are arranged at equal intervals in the circumferential direction. (2) Details of the embodiment
    Fig. 1 illustrates a cross-sectional configuration in a case where a small generator according to a first embodiment is installed in a hub of a bicycle.
    As shown in FIG. 1, a hub body 3 is rotatably disposed on a hub axle 1 by means of a bearing 2, and a small generator 4 according to the present embodiment is disposed inside the hub body 3.
    The hub axle 1 has threads 11 and 11 at both ends thereof and in such a manner that the threads 11 and 11 are screwed into nuts 12 and 12, the main body ribs 5 and 5 being between inner sides (central side in the axial direction of the hub axle 1) -Metalscheiben 13 and 13 and the «« ♦ φ * «·······························································································. *** ···· · λφ Qm ··· φφ »φφ
    Outside (end portion side) metal discs 14 and 14 are arranged, are configured to be fixed.
    Further, hereinafter, only a reference numeral will be given to each element, regardless of the number of each element, but the number of individual elements is as shown.
    The hub body 3 is rotatably arranged on both sides of the hub axle 1 via the bearing 2 in the further inner side of the metal shim 13.
    That is, an outer ring 21 of the bearing 2 is fixed to the hub body 3, and an inner ring 22 is fixed to the hub axle 1. The hub body 3 and the outer ring 21 are rotated with respect to the main body rib 5 fixed to the hub axle 1 and the hub axle 1 via a ball bearing 23.
    The N-heel body 3 - consists of a Mabenhauptkörpef 31 and a side main body surface portion 32nd
    The hub main body 31 includes the side main body surface portion 32, a
    A main body cylinder portion 33 and a hub flange 34 formed at both ends of the main body cylinder portion 33 so as to protrude outward in the radial direction, and the respective portions are formed integrally.
    A plurality of spoke holes 35 in which a wheel spoke (not shown) is hung is formed on the hub flange 34.
    The main body lateral surface portion 32 has an annular shape and is at an end portion of
    Main body cylinder portion 33 is formed. The outer ring 21 of the one bearing 2 (left side bearing 2 in the drawing) is fixed to an annular inner side (opposite side end portion to the main body cylindrical portion 33) of the main body side surface portion 32.
    A hub cap 36 of the hub body 3 includes an annular portion formed at an open end side (opposite side to the main body side surface 32 of FIG
    Main body cylinder portion 33) of the hub main body 31 is fixed, and the other outer ring 21 (right side in the drawing) of the bearing 2 is fixed to the inside of the annular portion.
    A rotor shutter cylinder 37, which is formed so that an outer diameter is smaller than an inner diameter of the hub main body 31, and which is received inside the hub main body 31, is integrally formed on the outer circumference Lc of the annular portion of the hub cap 36.
    The small generator 4 according to the present embodiment is housed inside the hub body 3.
    Hereinafter, a configuration of a small-sized generator 4 according to a first embodiment will be described with reference to an exploded perspective view in FIG. 2 in addition to a cross-sectional view in FIG.
    The small generator 4 comprises a rotor 41, a coil unit 42 (see FIG. 2), a
    Magnetic path forming section 43 (see FIG. 1) and an on-off switching element 45 (see FIG. 2). As in Fig. 1 and 2 «·« t ·· ·· »+ ··« · «t ·· ··» + ·· »» f
    * ·· f "# shown, each element is fixed or rotatable with respect to the outer periphery of a hub axle 1 arranged so that the center of each element coincides with an axis 15 of the hub axle 1.
    Moreover, as will be described later, the on-off switching element 45 is configured to prevent an increase in additional rotation of a wheel by avoiding the occurrence of iron loss during the light-off. However, since a total weight increases by as much as the weight of the element, it is also possible to configure the small generator 4 without arranging the element.
    A rotor 41 is configured of an annular member 411 having an annular disk shape and a permanent magnet 412.
    The ring-shaped member 411 is made of SUS 303 or aluminum, and the outer peripheral surface thereof is fixed to the inside of a rotor screw-in shaft 37. Furthermore, it is also possible to adopt a structure where the annular member 411 is provided on the inner peripheral surface of the hub main body 31 without providing the
    Rotor lock cylinder 37 is attached to the hub cap 36.
    The. Annular member 411 includes a number p (corresponding to a number of poles p) of circular through-holes formed at equal intervals on a concentric circle about the axis 15.
    In the present embodiment, the number of poles is twelve, and the permanent magnets 412 are inserted so that magnetic poles in a surface perpendicular to the axis 15 of the annular member 411 alternately occur. This means that it is possible to use the following: ····························································································. The permanent magnets 412 on both sides of the permanent magnet 412 are inserted so that one surface side is aligned with the north pole and the other surface side is aligned with the south pole, with one surface side aligned with the south pole and the other surface side with the north pole is aligned.
    In this way, the rotor 41 has a magnetic pole in the parallel direction (axial direction) to the axis 15th
    As the permanent magnet 412 used in the embodiment, various types of permanent magnets can be used. For example, a neodymium magnet mainly composed of Nd (neodymium), Fe (iron) and B (boron), a ferrite magnet (isotropy and anisotropy), a samarium-cobalt magnet or the like can be used.
    The coil unit 42 includes the stator of the small generator 4 together with the main path formation section 43.
    The spool 42 includes a spool 421 formed of a cylinder portion and an annular disk at both ends thereof, and a spool 422 wound around the cylinder portion of the spool 421.
    The coil unit 42 is not disposed on the inside of the rotor 41 but parallel to the axial direction (axis 15 direction) as shown in FIG. Accordingly, it is possible to reduce the outer diameter of the small-sized miniaturization generator 4 and also reduce the diameter of the hub body 3 accommodating the small generator 4.
    The coil 422 wound around the coil unit 42 passes through a through hole (not shown) formed at the magnetic path forming portion 43 (to be described later) and a recess portion formed on the hub axle 1, and is connected to the Bicycle lights connected, wherein it is arranged on the main body rib 5 as a conductor wire 423.
    The magnetic path forming portion 43 forms a magnetic path to concatenate the flux of the permanent magnet 412 and that of the coil 422 through a first magnetic pole portion 431, a second magnetic pole portion 434, a first cylinder portion 437, a second cylinder portion 438, and a connecting portion 439.
    The magnetic path forming portion 43 is configured to form a gap between the first magnetic pole portion 431 and the rotor 41, since a predetermined interval from a side bearing 2 (left side in FIG. 1) by a cylinder holding member 44, which is applied to the hub axle 1 deferred is maintained.
    In contrast, the second magnetic pole portion 434 is fixed at a predetermined position of a cylinder portion 452 (to be described later). In this way, a gap is formed between the rotors 41.
    In the magnetic path forming portion 43, the first magnetic pole portion 431 and the second magnetic pole portion 434 are opposed to each other so as to pinch a predetermined gap provided on both sides in the axial direction of the rotor 41. «4 * · · ft ··« · «·····························································································« § «» *** 4 * 4 · β «« 4
    Then, the outer peripheral end portion of the first magnetic pole portion 431 is connected to one end of the first cylinder portion 437, the other end of the first cylinder portion 437 is connected to the outer circumferential end of the connecting portion 439 having an annular disk shape, the axis-side circumferential end of the connecting portion 439 having one end of the second cylinder part 438 and the other end of the second cylinder part 438 is connected to the second magnetic pole section 434.
    In the magnetic path forming portion 43, as above, in addition to the connection between the other end of the second cylinder portion 438 and the second magnetic pole portion 434, the other joints are connected to each other by mutual fixation or by integral molding. Then, as described later, to configure to rotate the second magnetic pole portion 434 during the non-current generation time, the other end of the second cylinder portion 438 and the second annular portion 435 of the second magnetic pole "labschn-it-ts". 434 slidably disposed in contact with each other. The other end surface of the second cylinder portion 438 is formed to have a larger outer diameter than the opposite side to secure a contact area with the second magnetic pole portion 434.
    Further, the magnetic path forming portion 43 configures a connecting portion including the first magnetic pole portion 431 and the second magnetic pole portion 434 through the first cylinder portion 437 located on the outer peripheral side of the spool 422, the second cylinder portion 438 disposed on the inner peripheral side, and the second cylindrical portion 438 Connecting portion 439, which is arranged on the side surface, connects. * * * · * * .1ι: 1 * C · · - 15 * -
    The hub axle 1 is inserted on the inside of the second cylinder portion 438, and the second cylinder portion 438 is fixed on the hub axle 1.
    In addition, the second cylinder portion 438 is inserted into a cylinder portion of the bobbin 421, and the bobbin 421 is fixed to the second cylinder portion 438.
    The first cylinder portion 437 is disposed on the outer peripheral side of the coil unit 42 at a predetermined interval. Then, in such a manner that the first cylinder portion 437 and the second cylinder portion 438 are connected by the connecting portion 439, a ring coil chamber is formed, which accommodates the coil unit 42.
    The bobbin 421 is clamped such that an annular plate formed at its both ends in the axial direction, in contact with the
    Connecting portion 439 comes and the other annular plate comes into contact with the first magnetic pole 431. ~
    As shown in FIG. 2, the first magnetic pole portion 431 of the annular member 432 having a slightly smaller outer diameter than the outer diameter of the rotor 41 and m number of the first magnetic pole teeth 433 equally spaced inward in the radial direction (FIG. Center direction) of the annular member 432 protrude. The value of m is: m = p / 2 with respect to the number of poles p.
    Each head end of the first magnetic pole gear teeth 433 projecting in the axial direction of the ring member 432 protrudes to a first imaginary circle having substantially the same radius as the inner diameter of the rotor 41 about the axis 15. The head ends of the first
    Magnetic pole gear teeth 433 are formed in a semicircular shape, but they may also be a square or may take a shape along the first imaginary circle described above.
    On the other hand, the second magnetic pole portion 434 includes the second annular portion 435, which has substantially the same outer diameter as the above-described first imaginary circle, and m-number of second magnetic pole toothed teeth 436 equally spaced outwardly in the radial direction of FIG projecting second annular portion 435 out.
    The tip ends of the second magnetic pole gear teeth 436 protrude to a second imaginary circle having a radius slightly smaller than the outer diameter of the rotor 41 about the axis 15.
    The inner diameter of the second annular portion 435 is formed to have a size which is at -Z-ylindera-b-s-member 452 - in a Fa · 11, rather than the E ± n -axis.
    Switch element 45 (which will be described later) is fixable, and is formed to have a size which is fixable to the hub axle 1, when the element is not provided.
    In such a manner that the respective first magnetic pole gear teeth 433 oppose any of the second magnetic pole gear teeth 436 via the rotor 41, a mounting angle in the circumferential direction is set between the first magnetic pole section 431 and the second magnetic pole section 434 for the arrangement.
    That is, m-number of first imaginary lines (not shown) parallel to axis 15 through center 1
    The respective first magnetic pole gear teeth 433 correspond to m number of second imaginary lines (not shown) that pass through the center of the respective second magnetic pole gear teeth 436 parallel to the axis 15.
    Further, the positional relationship in the circumferential direction between the above first magnetic pole gear teeth 433 and the second magnetic pole gear teeth 436 is the positional relationship in a case where the on-off switching element 45 is not installed, and the positional relationship in a case of power generation (described later) becomes) when the on-off switch element 45 is installed.
    As shown in FIG. 2, the on-off switch element 45 functions as a magnetic pole section rotating means and includes a disk section 451, a cylinder section 452, and a grip section 453. (opposite end to the disk section 451) Cylinder section 452 fixed.
    The disk portion 451 has e-in center and is fixedly connected or one end of the cylinder portion opening portion. The hub axle 451 and the cylinder portion 452 slide.
    The second magnetic pole portion 434 circular "lcrch in s'e errer integrally formed with 452 on the circular 1 is inserted into the disc portion so that it is free at the other end of the
    The grip portion 453 is fixed to or integrally formed with the cylinder portion 452. By moving the grip portion 453 in the circumferential direction about the hub shaft 1, the second magnetic pole portion 434 which is on the * · t «I · · · f · · · · · · $ lfr * - * *
    ♦
    Cylinder portion 452 is attached via the disc portion 451 and the cylinder portion 452, rotated in the circumferential direction.
    The on-off switch element 45 is an element for switching between a current-generating state and a non-current-generating state, and is rotated about the axis 15 in the range of the angle of 2π / p (p is the number of poles) by the operation of the Handle portion 453 moves. The unit of π RAD (hereinafter always the same).
    As shown in Fig. 1, an inner metallic washer 454 is inserted on both sides of the disc portion 451, pushed onto the hub axle 1 together with the cylinder portion 452 between the outer ring 22 of the bearing 2 to allow the concentricity of the disc portion 451, and an outer metallic washer 455 is disposed between the metallic washer 13 for fixing the main body rib 5.
    A magnetized state during power generation using the small generator 4 configured above will be described with reference to FIG.
    When the wheel is rotated by running the bicycle, the hub main body 31 is rotated via a spoke suspended in the spoke hole 35, and the rotor 41 attached to the hub main body 31 is also rotated.
    At this time, the coil unit 42 configuring the stator and the magnetic path forming section 43 are directly or indirectly fixed with respect to the hub axle 1, and the hub axle 1 is fixed to the main body rib 5 of the bicycle. Therefore, the coil unit 42 and the • · · · · · 1 · · · · · · 19 · - ··
    Magnet path forming portion 43 is not rotated together with the hub axle 1.
    Then, as shown in FIG. 2, the first magnetic pole gear teeth 433 and the second magnetic pole gear teeth 436 are formed at equal intervals (m = p / 2) with respect to the number of poles p corresponding to the permanent magnets 412.
    Accordingly, as shown in FIG. 3A, at a certain moment, all of the first magnetic pole gear teeth 433 face the north pole of the permanent magnet 412 and all the second magnetic pole gear teeth 434 face the south pole. These are all other permanent magnets 412 of the total p number of the permanent magnets 412, that is, p / 2 number of the permanent magnets 412 having the same magnetic pole direction with respect to the first magnetic pole gear teeth 433 and the second magnetic pole gear teeth 436.
    In this case, as shown by the arrows in Fig. 3A, the magnetic flux of the permanent magnet 412- flows in the direction of the north pole, the first magnetic pole portion 431, the first cylinder portion 437, the connecting portion 439 sequentially. the second cylinder portion 438, the second magnetic pole portion 434, and finally the south pole, and is connected to the spool 422 at the second cylinder portion 438.
    In contrast, when the rotor 41 is rotated only by the angle of 2 n / p from a state in FIG. 3A, the state is changed to a state in FIG. 3B. Each of the permanent magnets 412 provided between the respective first magnetic pole gear teeth 433 in the state in FIG. 3A and whose magnetic poles are in opposite orientation are opposed to the first magnetic pole section 431 and the second magnetic pole section 434.
    In this state, as shown by the arrows in FIG. 3B, the magnetic flux of the permanent magnet 412 successively flows toward the north pole, second magnetic pole section 434, second cylinder section 438, connection section 439, first cylinder section 437, first magnetic pole section 431 and finally the south pole and is connected to the coil 422 on the second cylinder portion 438.
    As described above, when the wheel, the rotor 41 and the permanent magnet 412 are rotated in the course of riding the bicycle, the power generation is performed by repeating the state in FIG. 3A and the state in FIG. 3B by an intermediate state between the two ,
    Next, a case will be described where the power generation is performed by the small generator 4 n-i-ehtv
    In a case where the power generation is unnecessary, by moving a position of the on-off switching element 45 from a power generating position to a non-power generating position, the second magnetic pole portion 434 fixed to the cylinder portion 452 is rotated. The rotation angle of the second magnetic pole portion 434 is 2π / p (= π / m).
    Therefore, in a case where the on-off switching element 45 is disposed in the power generating position, the first imaginary lines passing through the centers of the respective first magnetic pole teeth 433 agree with the second imaginary lines passing through the centers of the respective ones second magnetic pole gear teeth 436 pass through. In contrast, when the on-off switch element 45 is moved to the non-current generating position, the second imaginary lines move to the centers of two of the first imaginary lines.
    That is, during power generation, the first magnetic pole gear teeth 433 and the second magnetic pole gear teeth 436 are arranged to face each other across the rotor 41. In contrast, during the power-off time, each of the second magnetic-pole gear teeth 434 is interposed between the first magnetic-pole gear teeth 433.
    Therefore, in a case where the first magnetic pole gear teeth 433 face the north pole of the permanent magnet 412, the second magnetic pole gear teeth 436 face the north pole of the permanent magnet 412, which the first magnetic pole gear teeth 433 do not face. Accordingly, even by the rotation of the rotor 41, the magnetic flux can not flow to the magnetic path forming portion 43, and thereby an increasing load of the wheel rotation is avoided.
    Next, the second to fourth embodiments of a small generator 4 will be described using FIGS. 4 to 6.
    In the second to fourth embodiments, instead of a small generator 4, as described in the first embodiment as a single generator unit, two small generators 4 are arranged inside a hub body 3.
    In such a manner that a single generator unit 1 (hereinafter referred to as a small generator 4) is arranged plural times and each of the coils 422 is connected in series, a high voltage can be obtained.
    I • • • • «« * · · • ♦ · t
    Μ · »- 22 * - ·· ·· ·· ♦ ·« · Ψ
    Further, in the following description, a case will be described where two small generators 4 are arranged, but more than three small generators 4 can be arranged as it is possible to accommodate them.
    In the second to fourth embodiments described below, a hub axle 1, a bearing 2, a hub body 3, a main body rib 5, and the like where the small generator 4 is arranged are the same as in the first embodiment, and thus their Description omitted.
    4 shows a cross-sectional configuration of the small generator 4 according to the second embodiment.
    In the first embodiment, a small generator 4 is disposed inside the hub body 3. In contrast, in the second embodiment, the small generator 4a and the small generator 4b are arranged in two axially in the same orientation. - - -
    Further, in the small generator 4 of the first embodiment, a lead wire 423 passes through a through hole formed at a connecting portion 439.
    However, in the second embodiment, a lead wire 423a passes through the through hole of a second cylinder portion 438a, and a lead wire 423b passes through the through hole of a second cylinder portion 438b. Moreover, the lead wires pass through a recess portion in the axial direction provided on the hub axle 1, and are guided up to the main body rib 5. • ·
    ··· * · φ * · t * · I • · * «
    However, also in the first to second embodiments and the third to fourth embodiments which will be described later, the through-hole through which the lead wire 423 passes may be either at
    Connecting portion 439 or formed on the second cylinder portion 438, and may further be formed on the first cylinder portion 437.
    In the second embodiment (the third to fourth embodiments are also the same), an imaginary line parallel to an axis 15 is laid through the center of each permanent magnet 412a to make an imaginary line parallel to an axis 15 passing through the center of each Permanent magnet 412b is aligned.
    Then, the magnetic pole orientations of the permanent magnet 412a and the permanent magnet 412b, which are arranged on the same imaginary line, are of the same opposite direction in the cases of the second to third
    However, they are arranged to have the same "direction in a case of the fourth embodiment.
    In addition, in a case where the magnetic pole orientation is the same, the winding directions of the two coils 422 are the same. In a case where the magnetic pole direction is the opposite direction, the winding directions of the two coils 422 are correspondingly the opposite direction.
    FIG. 5 shows a cross-sectional configuration of a small generator 4 according to the third embodiment.
    In the second embodiment, the two small generators 4a and 4b are arranged in the same orientation, but in the third embodiment, two small generators 4c and 4d are arranged in the opposite orientation.
    That is, the small generators are configured such that a coil 422c and a coil 422d are arranged on the inside, and a rotor 41c and a rotor 41d are disposed on the outside.
    As shown in FIG. 5, a first cylinder portion 437c is connected to a second cylinder portion 438c, and a first cylinder portion 437d is connected in common to a second cylinder portion 438d through a connecting portion 439cd.
    Still referring to Fig. 5, the first cylinder portion 437c, the first cylinder portion 437d, and a connecting portion 439 are integrally formed, but two or three own bodies are fixed to each other.
    Additionally, in the -third embodiment, the " S " is illustrated, when two small generators 4c and 4d are arranged in the opposite orientation, a case is described in which the coil 422c and the coil 422d are arranged on the inside and the rotor 41c and the rotor 41d are arranged on the outside, but It is also possible to arrange everything in reverse.
    That is, the rotor 41c and the rotor 41d are disposed on the inside, and the coil 422c and the coil 422d are disposed on the outside.
    In this case, a magnetic path forming section 43c and a magnetic path forming section 43d are connected to each other in the following manner: ## EQU1 ## * • * * * m • • • • • M »• * • • φ ··· ·· • *« · * »«
    Contact state, Accordingly, they can both be integrally formed.
    6 shows a cross-sectional configuration of a small generator 4 according to the fourth embodiment.
    In the fourth embodiment, similar to the third embodiment, a coil 422c and a coil 422d are disposed on the inside, and a rotor 41c and a rotor 41d are disposed on the outside.
    On the other hand, in the third embodiment, the magnetic pole orientations in the rotor 41c and the rotor 41d are in the same direction. In contrast, in the fourth embodiment, the magnetic pole directions in the rotor 41c and the rotor 41d are formed in the opposite direction. Therefore, in the fourth embodiment, a connection portion that connects a first cylinder portion 437c and a second cylinder portion 438c and connects a first cylinder portion 437d and a second cylinder portion 43'8cT is omitted because it is not necessary.
    Then, the currents of the magnetic flux are detected by a flux of the north pole of a permanent magnet 412c, a second magnetic pole section 434c, the second cylinder section 438c, the second cylinder section 438d, a second magnetic pole section 434d, and the south pole of a permanent magnet 412d, through a flux of the north pole of a permanent magnet 412d , a first magnetic pole portion 431d, a first cylinder portion 437cd, a first magnetic pole portion 431c, and the south pole of the permanent magnet 412c and formed by the opposite flux. ···
    Further, in the example shown in FIG. 6, the first cylinder portion 437cd is shown in common by integrally forming the first cylinder portion of the small generator 4c and the first cylinder portion of the small generator 4d, but they may each be formed as separate bodies.
    According to the fourth embodiment, a connecting portion 439 is unnecessary. Accordingly, the number of elements is reduced and the small generator 4 can be lighter.
    Further, as described in Fig. 6, a coil unit 42c and a coil unit 42d are arranged separately from each other, but both may be arranged in parallel by being brought into contact with each other.
    In addition, a bobbin 421 may be employed when a bobbin 421c and a bobbin 421d are communicated with each other as a common one. In this case, the common coil-eh-body-4-2-1 is made to be in "the" position, both of the coils 422c and 422d, by lengthening the cylinder portion (for example, twice Length). Accordingly, it is so constituted that two rotors 41c and 41d are co-located on both sides of a bobbin 421.
    Next, a fifth embodiment will be described.
    The fifth embodiment is intended to eliminate a cogging torque for the second to fourth embodiments where two small generators 4 are arranged.
    Fig. 7 is an exploded perspective view of a rotor 41 and the magnetic pole portions 431 and 434 in two small generators. In Fig. 7, there are shown a rotor 41a, a first one... Fff.
    Magnetic pole portion 4 31a and a second magnetic pole 434 a used to form a first generating unit 4A.
    In addition, a rotor 41b, a first magnetic pole portion 431b and a second magnetic pole portion 434b are inserted to form a second generation unit 4B.
    In the fifth embodiment, similar to the description in the first embodiment, first magnetic pole gear teeth 433a and 433b and second magnetic pole gear teeth 436a and 436b of the respective small generators 4a and 4b are arranged to face each other via the rotors 41a and 41b. In addition, imaginary lines parallel to an axis 15 are arranged so as to pass through the center of the first magnetic pole teeth 433a and the center of the second magnetic pole teeth 436a (so that a first imaginary line coincides with a second imaginary line). In addition, imaginary lines that are parallel to an axis 15 are arranged to pass through the center of the first magnetic pole teeth 433b and the center of the second Mag-ne-tpo 1 gear teeth 4 3-6b "(so that" ss The first imaginary line coincides with the second imaginary line).
    Then, in the fifth embodiment, an imaginary line A passing through the center (in FIG. 7, indicated by black circles in the same form hereinafter) of the first magnetic pole teeth 433a of the small generator 4a and the center of the second magnetic pole teeth 436a, and an imaginary line B passing through the center of the first magnetic pole gear teeth 433b of the small generator 4b and the center of the second magnetic pole teeth 436b are arranged to be shifted in the circumferential direction by an angle Θ.
    The angle Θ is 1/2 magnetic pole pitch, that is: π / p (= (1/2) x (2π / p)).
    Further, as described in the second embodiment, a broken line (imaginary line in the magnetic pole direction of the permanent magnet) C becomes parallel to an axis 15 passing through the center of each permanent magnet 412a and a broken line (imaginary line in the magnetic pole direction of the permanent magnet) D is disposed parallel to the axis 15 passing through the center of a permanent magnet 412b so as to coincide with each other.
    The magnetic pole orientation of the permanent magnet 412a and the permanent magnet 412b arranged on the same imaginary line C has the same orientation as that used in the configurations of the modification examples of the second to fourth embodiments which the fifth embodiment seeks. For example, in Fig. 7, since the configuration of the second embodiment is applied, the orientation is the reverse orientation.
    Fig. 8 illustrates cogging moments generated by the first generation unit 4A and the second generation unit 4B. Referring to FIG. 8, the magnetic pole orientation of the permanent magnet 412 is indicated by applying the second embodiment.
    In the fifth embodiment, the imaginary line A of the first generation unit 4A and the imaginary line B of the second generation unit 4B are incorporated so as to be displaced by the angle Θ of 1/2 magnetic pole pitch. Accordingly, phases of each cogging torque are shifted by 180 degrees and thus the two cogging torques cancel each other out. • ·· Μ - 2T-
    So it is possible to turn off the vibration by offsetting the cogging moments. It is particularly effective when two small generators 4 are arranged in the dental handpiece.
    Next, a sixth embodiment will be described.
    In the first to fifth embodiments, a case is described in which the outer peripheral surfaces of the rotor 41 are fixedly positioned on the inner peripheral surface of a hub body 3 constituting a rotating body. However, this embodiment takes a configuration in which the rotor 41 is fixedly positioned on the outer peripheral side of a rotating shaft (rotating body).
    9 is a cross-sectional configuration of a small-sized generator 4e according to the sixth embodiment.
    As shown in Fig. 9, the inner rings 22e of the two bearings 2e are replaced at both ends of a rotary shaft 6 constituting the rotating body, and the side wall members 62 and 63 are fixed to the Outer rings 21e attached by two bearings 2e.
    In the small generator 4e of the present embodiment, the rotor 41e is fixed to the rotation shaft 6, and a stator portion including the side wall members 62 and 63 is rotatably supported on the rotation shaft 6 from the bearing 2e.
    In the small generator 4e according to the present embodiment as well as similar to the first to fifth embodiments, a first magnetic pole portion 431e on one side (coil unit 42e) surface surface side of the rotor 41e and a second magnetic pole portion 434e on the other side are respectively
    Surface side arranged to face each other with a predetermined gap.
    On the other hand, the rotor 41e of the present embodiment and the rotor 41 of the first to fifth embodiments are configured such that a solid state and an open state are reversed in the outer peripheral surface and the inner peripheral surface having an annular shape.
    That is, the rotor 41 of the first to fifth embodiments is configured such that the outer peripheral surface is fixed to the inner peripheral surface of a hub main body 31 constituting the rotating body, and a gap (open state) between the inner peripheral surfaces and a hub axle 1 (no rotation) is present. In contrast, in the rotor 41e of the present embodiment, the outer peripheral surface is in the open state, and the inner peripheral surface is fixed to the rotary shaft 6 constituting the rotating body. - .....- -...... ~ -
    Therefore, a second magnetic pole portion 434e and a first cylinder portion 437e extending to the length of more than the outer peripheral side of the rotor 41e are fixed to the outer peripheral side thereof and the inner peripheral side is in the open state. In addition, the surface of the second magnetic pole portion 434e facing the rotor 41e and the opposite side surface on the side wall member 63 are also fixed.
    On the other hand, the first magnetic pole portion 431e and a second cylinder portion 438e extending to the front side of the rotor 41e are formed on the inner side of the inner magnetic field 41e. ··· ···········································
    Peripheral side attached thereto and the outer peripheral side is in the open state.
    The second cylinder portion 438e is configured so that the rotating shaft 6 is inserted on the inner side thereof in a non-contact state.
    Then, the second magnetic pole portion 434e and the first magnetic pole portion 431e are connected to each other by being fixed to a connecting portion 439e fixed to the side wall member 62.
    According to the above configuration, a magnetic path is formed in the order of the first magnetic pole portion 431e, the second cylinder portion 438e, the connecting portion 439e, a first cylinder portion 437e and the second magnetic pole portion 434e, or in reverse order.
    Next, an example of the use of the small generator 4e g according to the sixth embodiment will be described.
    10 is a cross-sectional view illustrating a state where the small generator 4e is installed in a dental handpiece 7.
    The dental handpiece 7 is a dental device for dental treatment, which rotates medical instruments using air as driving force.
    As shown in Fig. 10, the dental handpiece 7 comprises a gripper 71 and a head 72. Various medical instruments 73 are insertable and detachable with respect to the head 72 according to the therapy.
    The small generator 4e, which includes a rotary shaft 6, is installed inside the gripper 71. In the small generator 4e, a first cylinder portion 437e is fixed to the inner circumferential surface of an inner cylinder 74 of the gripper 71.
    One end of the rotary shaft 6 is connected to an air turbine (not shown) and the rotational force can be obtained from the air turbine. The rotation of the rotary shaft 6 is transmitted to a tip end shaft 76 via a bevel gear 75 obliquely formed at the other end, and is further transmitted to the medical instrument 73 via a bevel gear (not shown) inside the head 72.
    A lighting device such as an LED 77 is installed in the front end of the gripper 71 to illuminate the vicinity of the tip end of the medical instrument 73. A lead wire 423e pulled out of the small generator 4e is connected to the lighting device 77 * ------------ - - -
    In the dental handpiece 7 configured as above, during dental treatment by a dentist, the rotational force is transmitted from an air turbine to the high-speed medical instrument 73 via the rotating shaft 6 and the tip end axis 76.
    At this time, a rotor 41 of the small generator 4e fixed to the rotation shaft 6 is also rotated to generate power, and the current is passed through the lead wire 423e to the lighting device 77 around the vicinity of the therapy area where the medical instrument 73 is inserted to illuminate. • · • ♦
    • ·
    In the sixth embodiment described above, a case where a small generator 4e is provided will be described. However, similar to the second to fourth embodiments, a plurality of small generators 4e may be provided.
    In this case, the orientation of each small generator 4e, the magnetic pole orientation of a permanent magnet 412, and the positional relationship of each element are arranged similarly to the second to fourth embodiments.
    Then, as described in the fifth embodiment for the small generators 4e and 4e, which are arranged similarly to the second to fourth embodiments, a manner may be adopted such that the magnetic pole portion or the rotor 41 in a first generation unit 4A and a second generation unit 4B are installed to be shifted only by the angle Θ (= π / p) of 1/2 magnetic pole pitch to turn off cogging moments. If the cogging torques in the teeth-in-teeth-and-teeth-7- are eliminated, then a "big shot", very 1 pt, can be achieved for a therapist and a patient.
    Next, a seventh embodiment will be described.
    11 shows a cross-sectional configuration in a case where a small generator 4f of the sixth embodiment is installed inside a hub of a bicycle similar to the first embodiment.
    In the first to sixth embodiments, a permanent magnet 412 is disposed in a rotor 41 so that the magnetic pole orientation receives a direction parallel to a rotating shaft of a rotating body {hub body 3, rotating shaft 6).
    In contrast, in the small generator 4f of the seventh embodiment, a permanent magnet 412f is disposed in a rotor 41f so that the magnetic pole orientation obtains a direction perpendicular (radial direction) to the rotating shaft of the rotating body (hub body 3, rotating shaft 6).
    The rotor 41f of the seventh embodiment includes an annular member 411f and the permanent magnets 412f, which are equivalent to the annular member 411 and the permanent magnet 412 in the first embodiment, and additionally includes an annular disc 413f having the same inner diameter as the annular member 411f ,
    The washer 413f is fixed to a rotor shutter cylinder 37 on the outer peripheral surface thereof, and the annular member 411f is fixed to the side surface of one side of the coil unit 42 in the axial direction.
    Then, -i-n · -the plane-perpendicular to the axis Y-axis are formed in the radial direction in the annular member 411f at equal distances to the p-number of the annular member 411f. The permanent magnet 412f is fixed so that the magnetic poles are alternated with each of the through holes. Both end surfaces of the permanent magnet 412f are processed into a curved surface to match the outer peripheral surface and the inner peripheral surface of the rotor 41f.
    In addition, as the permanent magnet for use, any one described in the first embodiment can be used.
    Even in a case where the permanent magnet 412f is arranged so that the magnetic pole orientation is in the radial direction like this, a first magnetic pole portion 431f and a second magnetic pole portion 434f clamp the rotor 41f and are arranged to oppose the permanent magnet 412f.
    That is, as shown in FIG. 11, the first magnetic pole portion 431f includes a first cylinder portion 432f and first magnetic pole gear teeth 433f which are equivalent to a first annular portion 432 and first magnetic pole gear teeth 433 described in the first embodiment.
    In the first annular portion 432 and the first magnetic pole gear teeth 433 of the first embodiment, as shown in FIG. 2, m number of the first magnetic pole gear teeth 433 are inward in the radial direction and are on the inner circumferential surface of the first annular portion 432 formed at equal intervals a-us -.- - - - - - - - - -
    In contrast, in the first magnetic pole portion 431f of the seventh embodiment, one end in the axial direction of the first annular portion 432f is fixed to a first annular portion 437f, and m numbers of the first magnetic pole teeth 433f are in the opposite lateral direction to the first annular portion 437f are formed at equal intervals in the direction parallel to the axis from the other end.
    Then, the inner side surface in the radial direction of the m numbers of the first magnetic pole teeth 433f is formed in a curved shape so as to face the outer peripheral surface of the rotor 41f with a predetermined gap 1
    •··················································································································································· That is, the inner peripheral surface which faces the rotor 41f of the first magnetic pole teeth 433f is formed to fit an imaginary cylinder whose diameter is larger than the outer peripheral outer diameter of the rotor 41f by only γ1.
    On the other hand, the second magnetic pole portion 434f includes a second annular portion 435f and second magnetic pole gear teeth 436f that are equivalent to a second annular portion 435 and second magnetic pole gear teeth 436 in the first embodiment.
    In the second ring-shaped portion 435 and the second magnetic-pole gear teeth 436 in the first embodiment, as shown in FIG. 2, m numbers of the second magnetic-pole gear teeth 436 project outward in the radial direction and are equidistant on the outer peripheral surface of the second ring-shaped portion 435 educated.
    In contrast, in the two-pole magnetic pole section 4f of the seventh embodiment, m-numbers of the second magnetic-pole gear teeth 436f are in the opposite lateral direction to the second annular section 435 (opposite direction to the first magnetic-pole gear teeth 433f) at equal intervals in the direction parallel to the axis from one end (the same as the one end of the first annular portion 432f and the side where a coil unit 42 is arranged) in the axial direction of the second annular portion 435f.
    Then, the outer side surface is formed in the radial direction of m-numbers of the second magnetic-pole gear teeth 436f in a curved shape so as to be opposed to the inner peripheral surface of the rotor 41f with a predetermined gap. That is, the inner circumferential surface opposite to the rotor 41f of the second magnetic pole gear teeth 436f is formed to coincide with an imaginary cylinder whose diameter is smaller than the inner peripheral inner diameter of the rotor 41f by only γ 2. Similarly to the second annular portion 435 of the first embodiment, in the second annular portion 435f, the inner circumferential surface thereof is fixed to the annular portion 452 of an on-off switch element 45.
    Then, the inner peripheral side surface of the second magnetic pole gear teeth 436 and the outer peripheral surface of the second cylinder portion 438, but also the side end surface of the second annular portion 435 f and the end surface in the axial direction of the second cylinder portion 438 slidably contact each other.
    As described above, in the seventh embodiment, a magnetic path forming ng-sabsehn ± -tt ^ 43 is defined by the first magnetic pole portion 431f, the first annular portion 437, a connecting portion 439, the second annular portion 438, and the first annular portion 437 second magnetic pole tooth 436f configured.
    In the small generator 4 of the first embodiment, two elements of the first magnetic pole section 431 and the second magnetic pole section 434 are arranged in the axial direction. In contrast, in the seventh embodiment, it is possible to shorten the length in the axial direction in such a manner that an element of an annular disc 413 of the rotor 41f is arranged in the axial direction.
    That is, it is possible to further miniaturize the small generator 4 by shortening the length in the axial direction in such a manner that the space between the coil unit 42 and the annular member 411 in FIG. 7 is reduced.
    According to the small generator 4 of the present embodiments and the modification examples, the following effects can be obtained. (1) The coil unit 42 and the rotor 41 are not arranged in the radial direction but configured to be arranged in the axial direction.
    Accordingly, since the outer diameter of the small generator 4 can become smaller, the small generator 4 can be miniaturized.
    In addition, since the outer diameter of the rotor 41 becomes smaller, it is possible to reduce the weight of the permanent magnet, and thus weight reduction can be achieved to that extent. (2) In the first to sixth embodiments and the modification examples, the permanent magnet 412 is arranged so that the magnetic pole orientation is in the axial direction. That is, the through hole formed on the annular member 411 is formed in the axial direction, and the permanent magnet 412 is disposed on the through hole. Therefore, as compared with a case where the permanent magnet 412 is disposed at the through hole in the radial direction, a strong attachment or a structure capable of withstanding the centrifugal force is not required, and thus the manufacturing cost can be lowered. (3) The first magnetic pole portion 431 and the second magnetic pole portion 434 are configured to be located opposite to both pole faces of the permanent magnet 412, and it does not depend on the claw pole. Accordingly, it is possible to reduce the gap between the permanent magnets 412, and thus high voltage power generation can be achieved even with a low number of revolutions. (4) The coil 422 is wound around the rotation shaft of the rotor 41. Accordingly, the coil unit 42 can be obtained with a simple structure, and thus the small generator 4 also has a simple configuration. (5) The magnetic path forming portion 43 is configured so that two cylinder portions 437 and 438 extending from two magnetic pole portions 431 and 434 become one
    Thus, the number of components can be reduced, thereby providing a simple and inexpensive small generator. (6) According to the embodiment and the modification example, which arrange a plurality of the individual generator units in the axial direction, it is possible to achieve the high voltage by connecting a plurality of the coils in series. (7) According to the embodiment and the modification example arranging a plurality of the individual generator units in the axial direction, each element is arranged such that the cogging torque generated by a single generator unit and the cogging torque generated by the other unit is phase shifted by 180 degrees. Therefore, the cogging moments are offset, whereby a smooth rotation can be obtained. {8) By moving the on-off switching element 45 about the axis, the first magnetic pole gear teeth 433 of the first magnetic pole section 431 and the second magnetic pole gear teeth 436 of the second magnetic pole section 434 are arranged to oppose each other via the permanent magnet 412 during power generation no longer arranged that they are facing each other. That is, since the first magnetic pole gear teeth 433 and the second magnetic pole gear teeth 436 have the positional relationships respectively facing the same poles of the permanent magnet 412, the magnetic flux of the permanent magnet 412 no longer flows through the magnetic path forming section 43 by being connected to the coil 422 , As a result, the iron loss can be greatly reduced and the load torque can be reduced when the power generation is not needed.
    Hereinabove, embodiments according to the small generator 4 of the present invention have been described, but the present invention, without being limited to the described embodiments, can be variously modified within the scope as described in each claim.
    For example, a case where the rotor 41 illustrated in FIGS. 1 and 2 is configured by inserting a rod-shaped permanent magnet 412 into the annular member 411 in the axial direction is described, but the entire rotor 41 may be formed by the permanent magnet be.
    That is, a magnetic material shaped as an annular disk may be divided into p-number of poles in the circumferential direction by a surface perpendicular to the axis 15, and as the rotor 41, the permanent magnet where different poles are alternately magnetized on a plane can be fixed to the Rotor lock cylinder 37 or the inner peripheral surface of the main body cylinder portion 33 may be connected.
    Moreover, in the described embodiments, the magnetic path through the magnetic path forming portion 43 is formed so that the first magnetic pole portion 431 and the first cylinder portion 437 are fixed, the first cylinder portion 437 and the connecting portion 439 are integrally formed, the connecting portion 439 and the second cylinder portion 438 and the second cylinder portion 438 and the second magnetic pole portion 434 are slidably disposed in contact with each other {connection state as magnetic circuit, hereinafter). However, the other configuration can be adopted. - - - - -
    For example, the elements that are attached to each other may be integrally formed, or elements that are integrally formed may be formed separately and secured to each other.
    In addition, in the embodiment, the first magnetic pole portion 431 is in a fixed state with respect to the hub axle 1, and the second magnetic pole portion 434 is configured to be rotatable using the on-off switching element 45. However, the side of the second magnetic pole portion 434 may be in a fixed state with respect to the hub axle 1, and the first magnetic pole portion 431 side may be rotatably configured.
    In this case, the cylinder portion 452 of the on-off switch element 45 is fixed to the connecting portion 439 or the second cylinder portion 438.
    Then, in a case where the cylinder portion 452 is fixed to the connecting portion 439, in accordance with the movement of the on-off switching element 45, the first magnetic pole portion 431 is moved via the connecting portion 439 and the first cylinder portion 437. And then, the connecting portion 439 and the second cylinder portion 438 are slidably in contact with each other, and the second cylinder portion 438 and the second magnetic pole portion 434 are fixed. The connecting portion 439 and the first cylinder portion 437 are integrally formed or fixed, and the first cylinder portion 437 and the first magnetic pole portion 431 are fixed.
    On the other hand, in a case where the cylinder 515 is attached to the second arm portion 438b, the second cylinder portion 438 and the second magnetic pole portion 434 are slidably in contact with each other, and the second magnetic pole portion 434 is fixed to the hub axle 1 with respect to the second cylinder portion 438, which is a movable unit. The connecting portion 439 and the first cylinder portion 437 are fixed or integrally formed with respect to the second cylinder portion 438.
    In addition, in the second to fourth embodiments and in the modification examples described in FIGS. 4 to 6, a case will be described where the on-off switch element 45 is not disposed. However, as described in the first embodiment or the above-described modification example, one of the two first magnetic pole portions may be ♦ ♦ · ♦ · ♦ · * ψ · ♦ · φ - * + ± ο ψψ * ## ## τ 431 or two second magnetic pole portions 434 are in the fixed state with respect to the hub axle 1, and the other may be rotatably configured using the on-off switching element 45.
    In addition, in the sixth embodiment, a case is described where, in order to turn off the cogging torque, the imaginary line C and the imaginary line D are matched, and the imaginary line A and the imaginary line B are shifted only by the angle Θ in the circumferential direction {see Fig. 7).
    In contrast, the first magnetic pole portion 431a, the second magnetic pole portion 434a, the first magnetic pole portion 431b, and the second magnetic pole portion 434b may be arranged so that the imaginary line A and the imaginary line B are matched, and the imaginary line C and the imaginary line Line D can be arranged to be shifted only by the angle Θ in the circumferential direction.
    Moreover, the imaginary line Άτ and the imaginary line B can only be displaced by an arbitrary angle α and the imaginary line C and the imaginary line D can only be displaced by an angle (α + Θ) ,
    Further, the imaginary line C and the imaginary line D may be shifted only by an arbitrary angle β, and the imaginary line A and the imaginary line B may be shifted only by an angle (β + Θ).
    In addition, in the described seventh embodiment, the first magnetic pole portion 431 and the second magnetic pole portion 434 are configured such that the protruding directions of the first magnetic pole gear teeth 433f and the second magnetic pole gear teeth 436 in the FIG
    However, the orientation of the second magnetic pole portion 434 may be arranged to have the same orientation as the first magnetic pole portion 431.
    权利要求:
    Claims (1)
    [1]
    1.

    Claims 1. A small generator comprising: a rotor (41) having a plurality p of permanent magnets (412) and fixed to a rotating body; a coil (422) wound around an axis of the rotary body in a cylindrical shape, and a magnetic forming section (43) having a first magnetic pole section (431) and a second magnetic pole section (432) facing each other at a predetermined interval on both sides in a magnetic pole direction of the permanent magnet (412) of the rotor, and having a connecting portion (439) which passes through the inside of the coil (422) and has the first magnetic pole a-bs (-431) and the second magnetic pole portion (432), wherein the rotor (41) is arranged such that each magnetic pole direction of a plurality of the permanent magnets (412) alternates in the circumferential direction, the coil (422) fixed with a predetermined interval in the axial direction with respect to the rotor (41), and wherein the first magnetic pole portion (431) and the second magnetic pole portion (432) of the magnetau a configuration portion (43) configured such that p / 2 magnetic pole gear teeth (436) disposed opposite to each other by clamping the rotor (41) are arranged at regular intervals in the circumferential direction. A small generator according to claim 1, characterized in that magnetic pole section rotating means (45) for rotating each of said first magnetic forming section (431) and second magnetic forming section (432) by only an angle of 2πRAD / p in the circumferential direction with respect to the other are provided , Small generator, characterized in that the small generator (4) according to claim 1 or 2 as a single generator unit (4a, 4b) is used and the individual generator unit (4a, 4b) is arranged several times parallel in the axial direction of the rotating body. Small generator according to claim 3, characterized in that two of the individual generator units (4a, 4b) are provided and in a state in which they are in contact with each other, both of which are thus arranged a generator units, in that the coil direction of the rotor (41a, 41b) faces in the axial direction of the same direction or the opposite direction, wherein the magnetic pole of the permanent magnet (412a) of one rotor (41a) in the opposite direction to the magnetic pole of the permanent magnet (412b) of the other Rotor (41b), and wherein one coil (422a) and the other coil (422b) are wound in the opposite direction to each other. Small generator according to claim 3 or 4, characterized in that, so that a cogging torque, which of * ····················································································· A single generator unit (4a) is generated and the cogging torque generated by the other single generator unit (4b) is out of phase by 180 degrees, a positional relationship between an imaginary line A passing through the center of the first magnetic pole portion (431a) and the center of the magnetic pole tooth (436a) of the second magnetic pole portion (432a) in a single generator unit (4a) parallel to the axis and an imaginary line B passing through the Center of the first magnetic pole portion (431b) and the center of the magnetic pole tooth (436b) of the second magnetic pole portion (432b) in the other single generator unit (4b) and which is parallel to the axis, or a position relationship between an imaginary line C in a magnetic pole direction of the permanent magnet (412a) in which a single generator unit (4a) and an imaginary line D in the magnetic pole direction of the permanent magnet (412b) is placed in the other single generator unit (4b) is shifted by an angle of n-RAD / p in the circumferential direction.
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    同族专利:
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    法律状态:
    2021-10-15| MM01| Lapse because of not paying annual fees|Effective date: 20210218 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2012032873A|JP5981728B2|2012-02-17|2012-02-17|Small generator|
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