• 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 dynamoelectric machine is provided which has high efficiency and can be manufactured by a simple process. The dynamoelectric machine includes a permanent magnet (45) circumferentially arranging a plurality of magnetic poles on an outer periphery thereof, a coil fixing member (41) having a cylindrical roller member (42) at a position where the cylindrical roller member (42) is the permanent magnet (45) is opposed to an air gap formed therebetween; a cylindrical coil (44) whose entire surface is fixed to an outer peripheral surface of the cylindrical roller part (42) of the coil fixing member (41), a yoke (43) made of a magnetic material which is disposed at a position where Yoke (43) is opposed to an outer peripheral portion of the cylindrical coil (44), and an outer member (50), wherein the yoke (43) is disposed on an inner peripheral side of the outer member (50).
    公开号:AT511024A2
    申请号:T9372/2010
    申请日:2010-09-01
    公开日:2012-08-15
    发明作者:Shinji Kinoshita
    申请人:Seiko Instr Inc；Nakanishi Inc；
    IPC主号:
    专利说明:

    Description TITLE OF THE INVENTION:
    DYNAMQELECTRIC MACHINE AND HANDPIECE FOR DENTALOR MEDICAL TREATMENT
    FIELD OF THE INVENTION
    [0001]
    The present invention relates to an ironless motor, which uses a cylindrical coil, which in medical treatment equipment, a
    Precision meter or the like is used, a dynamoelectric machine that is used as a power generator, and a handpiece for dental or medical treatment, which is provided with the dynamoelectric machine.
    STATE OF THE ART
    [0002]
    In an ironless dynamoelectric machine using a solenoid, a motor is generally known which has a rotor in which a
    Cylindrical coil on an inner peripheral side of a housing, which consists of a magnetic material, is arranged, and a permanent magnet is arranged so that it faces the cylindrical coil, with a gap disposed between them (Patent Document 1}.
    [0003]
    In such a motor, the solenoid is in the 2nd
    Preceded in a cylindrical shape, and then the cylindrical coil is inserted into the housing.
    The solenoid used in the ironless dynamoelectric machine is roughly classified into the following three types. (1) hexagonal windings (Figure 3 (a)) (2) rhombic windings (Figure 3 (b)) (3) honeycomb windings {Figure 3 (c))
    The hexagonal turns are formed so that turns are formed from a self-fusing line, and coating sheets of the turns are fixed to each other by melting by means of heating or the like. In the hexagonal windings, parts of the windings are aligned with each other on a cylindrical axis, and therefore, linear line portions in the cylinder axis direction contributing to the generation of torque are present in central portions of the cylindrical windings, whereby a force that a magnetic pole undergoes effectively acting on a torque. Accordingly, the hexagonal turns are considered to be the most efficient of the three types of turns.
    On the other hand, the rhombic windings have no linear pipe sections in the direction of the cylinder axis, which contribute to a torque and are formed on inclined pipe sections as a whole, and therefore the utilization efficiency of the windings is 1 in comparison to the hexagonal windings
    - 3 - low. Accordingly, the rhombic windings are not a preferable winding method in terms of achieving high efficiency. Further, in the same manner as the rhombic windings, the honeycomb windings have no linear pipe sections in the cylinder axis direction contributing to torque, and therefore, the utilization efficiency of the windings is small compared to hexagonal windings.
    [0004]
    In general, in a motor, it is necessary to set a gap formed between a permanent magnet and a housing small. That is, the gap formed between the permanent magnet and the housing is made small, so that the magnetic flux density of the permanent magnet is kept large, thereby increasing an effective magnetic flux in the gap. Due to such a structure, the generated torque of the engine is increased, so that the energy efficiency of the engine is improved. Conversely, when the gap is large, a magnetic flux of the permanent magnet that couples the coil decreases, thereby reducing the generated torque of the motor.
    DOCUMENT TO THE PRIOR ART
    Patent Document
    [0005]
    Patent Document 1: JP-A-6-62555
    BRIEF SUMMARY OF THE INVENTION - 4 -
    PROBLEMS TO BE SOLVED WITH THE INVENTION [0006]
    In the above-mentioned motor, an inner peripheral surface of the cylindrical coil is disposed so as to oppose the permanent magnet with a gap therebetween. Accordingly, there arises a disadvantage that, in the deformation of the cylindrical coil, because the motor is left in a high-temperature environment, the coil and the permanent magnet come into contact with each other.
    In particular, with regard to medical treatment apparatuses used in surgical operations, dental treatments or the like, in order to prevent infection of a patient with bacteria, viruses or the like via the apparatus, the sterilization treatment is applied to the medical treatment apparatus under pressure standing high-temperature steam is used, for example, before and after the use of the devices. Accordingly, it is necessary to construct a motor that is integrated with the above-mentioned medical treatment apparatus so that the engine can withstand the high-temperature pressurized steam.
    [0007]
    Further, when the air gap is increased so as to prevent the solenoid from coming into contact with the permanent magnet even if the solenoid is deformed, there arises a disadvantage that the gap formed between the permanent magnet and the housing increases, so that a 5
    Magnet flux in a magnetic field of a magnet is small, whereby a generated torque of the motor is reduced.
    [0008]
    Further, the cylindrical coil is brought into a cylindrical shape in a state of a rewinding body, and the coil is disposed in the housing. Accordingly, forming the cylindrical coil into a cylindrical shape requires considerable efforts and labor, resulting in a drawback that the operability becomes low.
    [0009]
    Hereinafter, a conventional method of forming a cylindrical coil assuming hexagonal turns will be explained in connection with FIG. 4 to FIG.
    [0010]
    Fig. 4 is a view for explaining a winding operation. The aligned windings 62 are wound around a winding frame 61 having a hexagonal shape, and the windings 62 are temporarily fixed to the winding frame 61 by a tape 63 in a state where the windings 62 are wound around the winding frame 61 to rotate the winding frame 61
    Collapse of the turns to prevent. In such a state, the windings 62 from the
    Winding frame 61 removed, which has a hexagonal shape.
    6
    Fig. 5 is a view for explaining an operation for forming the windings 62 into a planar plate shape. A pair of opposing faces of hexagonal shape of the turns 62 removed from the winding frame 61 are dropped toward the winding frame axis, and the turns 62 are formed into a planar plate shape.
    [0012]
    FIG. 6 is a view for explaining one
    Winding operation. The turns, which are brought into a planar plate shape, are wound around a winding rod 64. Here is a band around the outside
    Wrapped periphery of the coils, which are formed by curling.
    Fig. 7 is a view for explaining a curing operation. A cylindrical coil 65, which is formed by removing the winding rod 64, is heated, and the cylindrical coil 65 is pressed by a cylinder forming device 66 for forming such that the degree of cylindricity of the
    Cylinder coil 65 is increased. The turns are formed of a self-fusing line, and therefore, the turns are melted together when heated, thereby preventing the coils from collapsing.
    [0013]
    The cylindrical coil which takes over the hexagonal turns is formed by the above steps. 7
    The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a dynamoelectric machine that can improve the energy efficiency by making a gap formed between a permanent magnet and a housing small is prevented by preventing the deformation of a solenoid, and enables the production of the cylindrical coil using a simple method.
    MEANS TO SOLVE THE PROBLEMS
    [0014]
    In order to achieve the above object, a dynamoelectric machine according to the present invention is characterized by incorporating the following: a permanent magnet having a plurality of
    Magnetic poles on an outer periphery of the same in the circumferential direction arranges; one
    A coil fixing member having a cylindrical roller member at a position where the cylindrical roller member is opposed to the permanent magnet with an air gap formed therebetween; a solenoid whose entire surface is fixed to an outer peripheral surface of the cylindrical roller part of the coil fixing member; and a yoke made of a magnetic material and disposed at a position where the yoke faces an outer peripheral portion of the cylindrical coil.
    [0015]
    In the structure of the present invention, the entire surface of the cylindrical coil is fixed to an outer peripheral surface of the cylindrical roller part of the coil fixing member, and therefore it is possible to prevent the contact between the coil and the permanent magnet, and it is also possible to prevent the deformation of the coil Prevent coil. Accordingly, it is no longer necessary to adjust a gap by taking into account the deformation of the coil, and therefore, a gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the cylindrical coil, and also a gap formed between the outer peripheral surface de Cylindrical coil and the inner peripheral surface of the yoke is formed, to be downsized. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0016]
    Further, the dynamoelectric machine according to the present invention is characterized by incorporating an outer member provided on an outer peripheral side of the yoke.
    Further, the dynamoelectric machine according to the present invention is characterized in that the cylindrical coil is formed into a cylindrical shape such that turns wound around a polygonal winding frame are made into a planar plate shape by causing the turns to move in the direction the winding frame axis, and thereafter the windings are wound around the outer peripheral part of the cylindrical roller part of the coil fixing member, and
    Cylindrical coil comprises linear conduit parts which extend along the longitudinal direction of the permanent magnet.
    In the present invention, by discarding a Einrolloperation and a hardening operation, which are carried out conventionally, the windings, which are wound around the polygonal winding frame, brought into a planar plate shape by causing the windings fall in the direction of the Windungsrahmenachse, and thereafter The windings are wound around the cylindrical roller part of the coil fastening element, so that the windings are brought into a cylindrical shape. Accordingly, a gap for inserting a cylindrical coil preliminarily set in a cylindrical shape into the cylindrical roller part becomes unnecessary, and therefore, a gap formed between the cylindrical roller part and the cylindrical coil can be made small compared to a case in which the solenoid is inserted into the cylindrical roller part. Further, the spool is formed by copying a cylindrical shape of the cylindrical roller member, and therefore, a cylindrical shape of the spool can be formed with high accuracy, whereby a gap formed between the outer peripheral surface of the cylindrical roller member and the yoke can be made small. Accordingly, a gap formed between a permanent magnet and the yoke can be downsized, thus increasing the energy efficiency of the dynamoelectric machine. The machining of the solenoid, which requires considerable time and effort, resulting in poor operability, can therefore be partially avoided. 10
    Further, the dynamoelectric machine according to the present invention is characterized in that the cylindrical roller part of the coil fixing member and the substantially entire inner peripheral surface of the cylindrical coil are fixed to each other by an adhesive.
    Due to this structure of the present invention, even if vibration or shock occurs or a temperature changes, there is no possibility that the cylinder coil is deformed, which increases the reliability of the dynamoelectric machine. Further, since there is no deformation of the solenoid, it is unnecessary to form a gap formed by considering the coil deformation. Accordingly, the gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the cylindrical coil and the gap formed between the outer peripheral surface of the cylindrical coil and the inner peripheral surface of the yoke can be reduced. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Further, it is possible to omit a conventional hardening operation for self-melting resins of the windings.
    Further, the dynamoelectric machine according to the present invention is characterized in that a thickness of an end portion of the coil fixing member on a cylinder axis in the radial direction on a cylinder axis is set larger than a thickness of the cylindrical roller part in the radial direction. 11 [0017]
    Further, the dynamoelectric machine of the present invention is characterized in that the coil fixing member includes a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller member at an end portion of the cylindrical roller member on a cylinder axis.
    [0018]
    Due to this structure of the present invention, the amount of deformation of the cylindrical roller member at a stress deforming the cylindrical roller member can be reduced, and therefore the deformation can be suppressed even if a wall thickness of the cylindrical roller member is small. Further, since the deformation of the cylindrical roller member is suppressed, the gap formed between the peripheral outer surface of the permanent magnet and the peripheral inner surface of the cylindrical member can be eliminated
    Roller part is formed, and the gap between the outer peripheral surface of the cylindrical
    Roller part and the peripheral inner surface of the yoke is formed to be downsized. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine of the present invention is characterized in that a length of the yoke in the radial direction is set larger than a length of the cylindrical roller part in the radial direction.
    Further, the dynamoelectric machine of the present invention is characterized in that the cylindrical roller part is disposed on an inner peripheral side of the cylindrical coil and the yoke is disposed on an outer peripheral side of the cylindrical coil so that the cylindrical coil is fitted between the cylindrical roller part and the yoke.
    Due to this structure of the present invention, the degree of deformation of the yoke having a large radial length can be reduced at a stress that deforms the cylindrical roller part. Accordingly, even if a wall thickness of the cylindrical roller part is small, the deformation of the cylindrical roller part can be suppressed. Further, since the deformation of the cylindrical roller member can be suppressed, the gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the cylindrical roller member and the gap formed between the outer peripheral surface of the cylindrical roller member of the coil mounting member and the inner peripheral surface of the yoke is made smaller. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine of the present invention is characterized in that the coil fixing member is formed by using a resin. - 13 ♦ · · · · · «· ·
    Further, the dynamoelectric machine of the present invention is characterized in that the coil fixing member is formed by using a resin having a flexural elastic modulus of 5000 MPa or more.
    Due to this structure of the present invention, the coil fixing member is molded using a resin, and therefore, it is possible to make a magnetic flux of a permanent magnet couple to a coil without being interrupted by the coil fixing member. Further, when the bending modulus of the coil fastener is 5000 MPa or more, the deformation at the time of operation is prevented, so that the operation of the coil fastener can be performed with high accuracy. Accordingly, the gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fastening member and the gap formed between the outer peripheral surface of the coil fastening member and the inner peripheral surface of the yoke can be reduced. Further, a thickness of the coil fixing member can be reduced by cutting. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    Further, the dynamoelectric machine according to the present invention is characterized in that the outer member is formed by using a resin. - 14 t * • «« «* • t«
    Further, the invention is characterized in that the outer member is formed by using a resin having a bending elastic modulus of 5000 MPa or more.
    By virtue of this structure of the present invention, the outer member is formed by using a resin, and thus a leakage current can be prevented. Further, when the bending modulus of the outer member is 5000 MPa or more, the deformation at the time of operation is prevented, so that the operation of the coil fastening member can be performed with high accuracy. Further, the outer member is made to have a small wall thickness. Accordingly, the dynamoelectric machine can be made small and lightweight.
    Further, the dynamoelectric machine of the present invention is characterized in that the cylindrical roller part of the coil fixing member has a hole.
    Due to this structure of the present invention, the dynamoelectric machine can be made lightweight. Further, the flow of an eddy current, which is generated when the coil fixing member is formed using a conductive material, is interrupted by a hole, and therefore, a loss caused by the eddy current can be reduced. Accordingly, the energy efficiency of the dynamoelectric machine can be increased.
    Further, the dynamoelectric machine of the present invention is characterized in that the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes a bearing disposed on the shaft at a position different from a position where the permanent magnet is disposed is, and an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of a bearing support member, the distance from
    Coil fixing element is arranged.
    Due to this structure of the present invention, there is no possibility that a magnetic flux from the permanent magnet coupling the cylindrical coil is scattered around the bearing, and therefore it is possible to prevent the decrease of the magnetic flux coupling the solenoid, thereby improving the energy efficiency of the solenoid dynamoelectric machine is improved.
    [0019]
    Further, the dynamoelectric machine of the present invention is characterized in that the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes a bearing disposed on the shaft at a position different from a position where the permanent magnet is located is disposed, and an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of the coil fastening member or an inner peripheral surface of the bearing support member which is disposed on an inner peripheral surface of the coil fastening member.
    [0020]
    Due to this construction of the present invention, the permanent magnet and the. Can be used
    Coil fastener to be arranged concentrically with high accuracy. Accordingly, a gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fixing member can be downsized. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0021]
    Further, the dynamoelectric machine of the present invention is characterized in that the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes two bearings disposed on the shaft at positions different from a position where the permanent magnet is disposed , an outer peripheral surface of a bearing in contact with an inner peripheral surface of the bearing
    Is brought to a coil fastener or an inner peripheral surface of the bearing support member which is mounted on an inner peripheral surface of the coil fastener, and an outer peripheral surface of the other bearing in contact with an inner peripheral surface of a
    Lagerhalteelementes is brought, which is arranged at a distance from the coil fastening element.
    [0022]
    Due to this structure of the present invention, when using a bearing, the permanent magnet and the coil fixing member can be concentrically arranged with high accuracy, and therefore, it is possible to maintain a small gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the coil fixing member is formed. By
    Disposing the other bearing at the position spaced from the coil fixing member makes it possible to prevent a magnetic flux of the permanent magnet from scattering around the bearing, thus improving the energy efficiency of the dynamoelectric machine.
    [0023]
    Further, the dynamoelectric machine of the present invention is characterized in that the bearings are arranged at the end portions of the shaft.
    [0024]
    By virtue of this structure of the present invention, vibrations generated in the dynamoelectric machine can be reduced, and a load is distributed across the bearings, so that the life of the bearings is increased.
    Further, the dynamoelectric machine of the present invention is applicable to a dental or medical treatment handpiece characterized by including: a turbine blade disposed on the shaft at a position different from the positions where the permanent magnet is located and the bearings are arranged; a light emitting part electrically connected to the cylindrical coil; and an air supply pipe containing a fluid for rotating the
    Turbine blade supplies.
    The handpiece for dental or medical treatment according to the present invention comprises the above-mentioned dynamoelectric machine, and therefore the energy efficiency is high, whereby the light intensity of a light emitting part of the handpiece can be increased. Furthermore, the handpiece can be made per se at low cost.
    ADVANTAGEOUS EFFECTS OF THE INVENTION
    [0025]
    According to the dynamoelectric machine of the present invention, the entire surface of the cylindrical coil is fixed to an outer peripheral surface of the cylindrical roller part of the coil fixing member, and therefore it is possible to prevent the contact between the coil and the permanent magnet. Accordingly, it is no longer necessary to set a gap in consideration of the deformation of the coil, and therefore it is possible to form the gap formed between the outer peripheral surface of the permanent magnet and the inner peripheral surface of the cylindrical coil, and also the gap that exists between the outer peripheral surface de cylindrical coil and the inner peripheral surface of the yoke is formed, to downsize. Accordingly, the gap formed between the permanent magnet and the yoke can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    BRIEF DESCRIPTION OF THE DRAWINGS
    - 19
    Figure 1 is a schematic cross-sectional view of a dynamoelectric machine according to the present invention in a state in which the dynamoelectric machine is integrated into a handpiece for dental treatment.
    Figure 2 is a cross-sectional view of the dynamoelectric machine according to the present invention.
    Fig. 3 is a view showing a method of winding a solenoid.
    FIG. 4 is a view showing a state of FIG
    Windings, which shows by winding hexagonal winding coils on a winding frame.
    Figure 5 is a view of a flat
    Coil made by transforming the hexagonal
    Winding coils is produced in a flat shape by pressing.
    Fig. 6 is a view showing a state in which the flat-shaped coil formed of hexagonal winding coils is rolled around a tension rod.
    FIG. 7 is a view of a cylindrical device used for forming the
    Hexagonal winding coils are used in a cylinder and a rolled coil.
    FIG. 8 is a cross-sectional view of a dynamoelectric machine according to the present invention
    Invention.
    FIG. 9 is a perspective view of a coil mounting member of a dynamoelectric machine according to another embodiment, wherein the coil mounting member has holes in a cylindrical roller member.
    FORM OF EMBODYING THE INVENTION
    [0027]
    Hereinafter, an embodiment of a dynamoelectric machine and a handpiece for dental treatment according to an embodiment of the present invention will be explained in conjunction with FIGS. 1 and 2.
    As shown in FIG. 1, a handpiece 1 for dental treatment consists of a tool-inserting turbine 21, which rotatably drives a treatment tool 22 about an axis L, a head part 2, which supports the
    Tool insert turbine 21 rotatably holds, and a handle part 3, which is gripped by the user.
    An air supply pipe 51 and a water supply pipe 52 extend forward from a rear end portion of the grip part 3. A dynamoelectric machine 40 is disposed inside the rear portion of a housing 38. In this embodiment, the dynamo-electric machine 40 is also used as a power generator. Although the dyneo-electric machine is explained in a mode in which the dynamo-electric machine is provided for the handpiece for dental treatment, in this embodiment, the dynamo-electric machine is not
    Limited to such a mode, it can also be used in other modes.
    A shaft 46 rotatably supported by the bearings 47, 48 is provided at the center of the cylinder axis of the dynamo-electric machine 40. The bearing 48 is held by a bearing holding member 54 disposed in a front portion of the housing 39 side. The bearing 47 is from a
    Bearing member 53 is held, which is fitted in a coil fastener 41. It is positive that the bearing 48 and the bearing 47 are not affected by the magnetic flux of a permanent magnet. In this case, the bearing 4 8 and the
    Bearings 47 are preferably formed from an oil-less bearing, which is mainly made of, for example, copper or the like. Further, a permanent magnet 45 is disposed on an outer peripheral surface of the shaft 46. Further, the coil fixing member 41 is disposed with an air gap formed between the permanent magnet 45 and the coil fixing member 41. A solenoid 44 is provided on an outer peripheral surface of the coil fixing member 41. A yoke 43 is disposed at a position where the yoke 43 faces an outer periphery of the cylindrical coil 44. A blade 37 of a power generation turbine is mounted on the front portion of the shaft 46. In FIG. 1, the
    Turbine blade 37 and the permanent magnet 45 between the bearings 47, 48 are arranged. However, that is
    Turbine blade 37 is not always disposed between the bearings 47, 48. In this case, it is sufficient that the turbine blade 37 is disposed on the shaft 46 at a position different from positions at which the permanent magnet 45 and the -22 * Λ
    Bearings 47, 48 are arranged. For example, the turbine blade 37 may be disposed on the shaft 46 at a position outside of the bearing 48.
    With respect to an air flow supplied through the air supply pipe 51, air is throttled by an introduction nozzle provided in a front portion of the housing 39, and is introduced into the turbine blade 37 and rotates the shaft 46 is mounted on an outer peripheral surface of the shaft 46 is rotated with the shaft and generates an induction voltage in the solenoid 44. The voltage generated in the solenoid 44 passes through an electrical line 32 via the pins 49 and is connected to an LED 31 is applied, whereby the LED 31 is turned on.
    A fluid, such as air introduced into the turbine blade 37, is diverted to a front of the turbine, is introduced into the tool bit turbine 21 after passing through an air passage 33, and rotates the treatment tool 22.
    FIG. 2 is a cross-sectional view of the dynamo-electric machine 40 shown in FIG. As shown in FIG. 2, the dynamo-electric machine 40 includes the shaft 46 on the cylinder axis. The permanent magnet 45 is rotatably mounted on the outer peripheral surface of the shaft 46. The bearing 47 and the bearing 48 are disposed on the shaft 46 at positions different from the position where the permanent magnet 45 is disposed. In the case of this embodiment, the bearing 47 and the bearing 48 on the shaft 46 are on • · 23 · · 23 · »·» ·
    End portion sides arranged opposite to the permanent magnet 45th
    An outer peripheral surface of the bearing 47 is brought into contact with an inner peripheral surface of the bearing holding member 53, which is disposed on an inner peripheral side of the coil fixing member 41. In this case, since the outer peripheral surface of the bearing 47 is brought into contact with the inner peripheral surface of the bearing holding member 53 disposed on the inner peripheral side of the coil fixing member 41, the permanent magnet 4 and the coil fixing member 41 can be concentrically arranged with high accuracy, thereby A gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the coil fixing member 41 can be reduced. Accordingly, a gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamo-electric machine 40. It is not always necessary to bring the bearing 47 into contact with the inner peripheral surface of the bearing holding member 53, it is sufficient that the bearing 47 is brought into direct contact with the inner peripheral surface of the coil fixing member 41.
    An outer peripheral surface of the bearing 48 is brought into contact with an inner peripheral surface of the bearing holding member 54 spaced from the coil fixing member 41. That is, the bearing 48 is disposed outside the inner peripheral surface of the coil mounting member 41. In this case, the bearing 48 is mounted on the shaft 46 at a distance of - 24 - 24 - 24 -
    • »·; * * * · ·, L Λ * * ........
    Permanent magnet 45 is arranged, and therefore there is no possibility that a magnetic flux from
    Permanent magnet 45, which couples the solenoid 44, scatters around the bearing. Accordingly, a magnetic flux coupling the solenoid 44 does not decrease, whereby the energy efficiency of the dynamoelectric machine 40 can be increased.
    [0028]
    Further, the bearings 47, 48 on the axial
    End portions of the shaft 46 is arranged. Due to such a structure, vibrations generated in the dynamo-electric machine 40 can be reduced, and stress is distributed to the bearing 48 and the bearing 47, so that the life of the bearing 48 and bearing 47 can be extended.
    [0029]
    The arrangement of the bearings 47, 48 is not always limited to the above case. For example, the outer peripheral surfaces of bearings 47 and bearings 48 may be brought into contact with either the inner peripheral surface of the coil mounting member 41 or the inner peripheral surface of the bearing support member 53 disposed on an inner peripheral side of the coil mounting member 41. In this case, it is not always necessary to arrange the turbine blade 37 between the bearing 47 and the bearing 48.
    Further, the outer peripheral surface, bearing 47 and bearing 48 can be brought into contact with the inner peripheral surface of the bearing support member 54 spaced from the coil mounting member
    • I ♦ · · * 41 arranged. is. Further, the bearings 47, 48 may not be disposed on the axial end portions of shaft 46. Even in these cases, the entire surface of the cylindrical coil 44 is fixed to an outer peripheral surface of a cylindrical roller part 42 of the coil fixing member 41, and therefore the contact between the cylindrical coil 44 and the permanent magnet 45 can be prevented, and the deformation of the cylindrical coil 44 can be prevented. whereby the gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical coil 44 and also the gap formed between the outer peripheral surface of the cylindrical coil 44 and the inner peripheral surface of the yoke 43 can be reduced. Accordingly, even in these cases, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Further, the shaft 46 may be rotated by a method different from a method using the turbine blade 37.
    The permanent magnet 45 is formed of an Sm / Co sintered anisotropic magnet and is magnetized to have two poles. Further, the permanent magnet 45 may be formed of a Nd-Fe-B magnet. Further, the permanent magnet 45 may be formed of a bonded magnet instead of a sintered magnet. Further, the permanent magnet 45 may be formed of an isotropic magnet. Furthermore, the permanent magnet 45 may consist of several, that is, two or more poles. - 26 - - 26 - • * • ** · »· • *» * • · · • · «• · * ··· ·· i '* * ···. • · * ·:
    The coil fixing member 41 is disposed on the outer periphery of the permanent magnet 45 with an air gap formed therebetween. The coil fixing member 41 has the cylindrical roller part 42 at a portion thereof facing the permanent magnet 45, and the cylindrical coil 44 is at the outer peripheral surface of the cylindrical roller member 42 is fixed. It is preferable to set a thickness of the cylindrical roller member 42 so that the cylindrical roller member 42 can ensure strength and has a small thickness. In this case, the thickness of the cylindrical roller member 42 is preferably, for example, 0.3 mm. The thickness of the cylindrical roller member 42 is not limited to the above value and can be set to 0.1 mm or more and 0.5 mm or less. The coil fixing member 41 is formed by using a resin (polyphenylene sulfide or the like). In this case, the coil fixing member is preferably formed by using a resin having a bending modulus of 5000 MPa or more. Terminal pins 49 are fixed to an end portion of the coil fixing member 41. Further, a lead of a field coil is fixed to an end portion of the terminal pin 49.
    The yoke 43 is provided at a position where the yoke faces an outer peripheral side of the solenoid 44. The yoke 43 is provided for magnetically connecting the magnetic poles of the permanent magnet, and is formed by laminating thin magnetic plates, such as electromagnetic steel sheets. The yoke 43 may be formed by using a magnetic material in a single steel block, for example. 27
    An outer member 50 is provided on an outer peripheral side of the yoke 43. The yoke 43 and the outer member 50 may be attached to each other with, for example, an adhesive or the like.
    [0030]
    The outer member 50 has a cylindrical shape opening at both ends thereof. The coil fixing member 41 is connected to both end portions of the outer member 50. The outer member 50 may be formed using a resin (PPS or the like). In this case, the outer member 50 is formed by using a resin having a bending modulus of 5000 MPa or more. Accordingly, leakage can be prevented. The outer member 50 may be formed with, for example, a magnetic material or metal.
    The yoke 43 may also function as the outer member 50. In this case, the yoke 43 forms an outside of the dynamo-electric machine 40, and therefore, a portion of the outer member 50 shown in FIG. 2 is also formed of the yoke 43.
    A hole, which is not shown in the drawing, is formed in the coil fixing member 41, so that it is possible to fill a resin, such as an epoxy adhesive, through the hole into the inside of the coil fixing member 41, that of the coil fixing member 41 and Surrounding outer element 50.
    28
    Here, the method of forming the solenoid 44 will be explained. Aligned turns are wound around the winding frame, which has a hexagonal shape, and thereafter, in a state where the
    Windings are wound around the winding frame, the turns are temporarily fixed with a band that prevents turns from collapsing. In such a state, the windings are removed from the winding frame, which has a hexagonal shape, and thereafter the turns made by the winding frame are removed
    Winding frame are removed, brought into a planar plate shape by causing a pair of opposite surfaces with hexagonal shape is dropped in the direction of the winding frame axis. Then, the turns, which are brought into a planar plate shape, are wound around the cylindrical roller member 42 and are fixed to the cylindrical roller member 42 with an adhesive.
    [0032]
    The mode of operation of the dynamo-electric machine 40 according to this embodiment having such a construction will be explained hereinafter.
    [0033]
    The entire surface of the cylindrical coil 44 is fixed to the cylindrical roller member 42, and therefore, it is possible to prevent the contact between the cylindrical coil 44 and the permanent magnet 45, and it is also possible to prevent the deformation of the cylindrical coil 44. Accordingly, a gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface 29 of the cylindrical coil 44 and also a gap formed between the outer peripheral surface of the cylindrical coil 44 and the inner peripheral surface of the yoke 43 can be reduced. Accordingly, the gap that exists between the
    Permanent magnets 45 and the yoke 43 is formed to be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0034]
    Further, the coil fixing member 41 is formed by using a resin having a bending modulus of 5000 MPa or more, and therefore, the coil fixing member 41 can be formed with high accuracy. Further, a thickness of the cylindrical roller member 42 can be reduced. Accordingly, the gap that exists between the
    Permanent magnets 45 and the yoke 43 is formed to be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0035]
    Further, when the area covering the cylindrical coil 44 is filled with the resin, the air in a space surrounded by the coil fixing member 41 and the outer member 50 can be reduced. Even if air expands due to a high temperature in the sterilizing treatment, the deformation or the breakage of the cylindrical roller member 42 can be prevented. Further, since the deformation of the cylindrical roller member 42 can be prevented, it is possible to reduce a thickness of the cylindrical roller member 42. Accordingly, a gap formed between the permanent magnet 45 and the 30th
    Yoke 43 is made smaller, thus increasing the energy efficiency of the dynamoelectric machine.
    [0036]
    Further, in this case, the cylindrical coil 44 has a small and uniform coil thickness, and therefore, the resin also has a small and uniform thickness in the radial direction-even if a gap is formed in the space surrounded by the coil fixing member 41 and the outer member 50, and high-temperature high pressure steam penetrates into a resin portion covering the cylindrical coil 44, so that the resin swells, the deformation and breakage of the cylindrical roller member 42 can be prevented accordingly. Further, the deformation of the cylindrical roller member 42 can be suppressed even if the thickness of the cylindrical roller member 42 is reduced, and therefore, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, which increases the energy efficiency of the dynamoelectric machine ,
    Further, with respect to the coil fixing member 41, a thickness of an axial end portion in the radial direction is set larger than a thickness of the cylindrical roller portion 42 in the radial direction. With respect to the coil fixing member 41, the axial end portion is formed of a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller member 42. Although the axial end portion of the coil fixing member 41 is formed of the large outer diameter portion, the axial end portion of the -31
    The coil fixing member 41 is not limited to such a shape as long as the thickness of the axial end portion in the radial direction is larger than the thickness of the cylindrical roller member 42 in the radial direction. For example, the axial end portion of the coil fixing member 41 may be formed of a small outer diameter portion having an outer diameter smaller than an outer diameter of the cylindrical roller member 42, with a large inner diameter portion having an inner diameter larger than one Inner diameter of the cylindrical roller member 42, or from a small inner diameter portion having an inner diameter which is smaller than an inner diameter of the cylindrical roller member 42. That is, since the thickness of the axial end portion of the coil fixing member 41 in the radial direction is larger than the thickness of the cylindrical roller member 42 in the radial direction, the rigidity of the cylindrical roller member 42 increases, so that the deformation of the cylindrical roller member 42 by the axial end portion of the coil fixing member 41 can be suppressed, whereby the thickness of the cylindrical roller member 42 can be reduced. Further, since the deformation of the cylindrical roller member 42 can be suppressed, the gap formed between the peripheral outer surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42, and the gap formed between the peripheral outer surface of the cylindrical roller member 42 and the peripheral inner surface of the yoke 43 is formed to be reduced. Accordingly, the gap formed between the permanent magnet 4 5 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Although the thickness of the one axial - 32 - 1
    End portion of the coil fixing member 41 is set larger than the thickness of the cylindrical roller member 42 in the radial direction, this embodiment is not limited to such a case. That is, the thickness of the other axial end portion of the coil fixing member 41 can be set larger than the thickness of the cylindrical roller member 42 in the radial direction. Further, the thickness of both axial end portions of the coil fixing member 41 can be set larger than the thickness of the cylindrical roller member 42 in the radial direction.
    In the case where the cylindrical roller member 42 and the substantially entire inner peripheral surface of the cylindrical coil 44 are fixed to each other by an adhesive, even if vibration or shock occurs or a temperature changes, there is no possibility that the solenoid 44 deforms , which increases the reliability of the dynamoelectric machine. Further, since there is no deformation of the cylindrical roller member 44, the gap formed between the peripheral outer surface of the permanent magnet 45 and the peripheral inner surface of the coil 44 and also the gap formed between the peripheral outer surface of the cylindrical coil 44 and the peripheral inner surface of the yoke 43 is made smaller. Accordingly, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. Further, it is possible to omit a hardening operation for heating a self-melting resin of the turns.
    [* * * * * »* *« 4 * 33
    In forming the cylindrical coil 44, the turns which have been formed into a planar plate shape are wound around the cylindrical roller member 42 and fixed by an adhesive. Accordingly, a gap between the cylindrical roller member 42 and the cylindrical coil 44 can be eliminated.
    Further, the cylindrical roller member 42 may be disposed on an inner peripheral side of the cylindrical coil 44, and the yoke 43 may be disposed on an outer peripheral side of the cylindrical coil 44. In this case, the length of the yoke 43 in the radial direction is set larger than a length of the cylindrical roller part 42 in the radial direction. Further, the yoke 43, which has a length in the radial direction that is longer than a length in the radial direction of the cylindrical roller part 42, can reduce a magnitude of deformation at a bending stress that deforms, for example, the cylindrical roller part 42. Accordingly, the deformation can be suppressed even if a wall thickness of the cylindrical roller member 42 is small. Further, since the deformation of the cylindrical roller member 42 is suppressed, the gap formed between the peripheral outer surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 and the gap formed between the peripheral outer surface of the cylindrical roller member 42 and the peripheral outer surface Inner surface of the yoke 43 is formed to be reduced by an amount corresponding to the suppression of the deformation. Accordingly, the gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. 34
    Further, the cylindrical coil 44 is brought into a cylindrical shape of the cylindrical roller member 42, and therefore, a cylindrical shape of the cylindrical coil 44 can be formed with high accuracy, whereby a gap between the outer peripheral surface of the cylindrical roller member 42 and the inner peripheral surface of the yoke 43rd is formed, can be scaled down. Accordingly, as compared with a case where the coil is made into a cylindrical shape in advance and the cylindrical coil is inserted into the cylindrical roller part, a gap formed between the permanent magnet 45 and the yoke 43 can be reduced, thereby improving energy efficiency the dynamoelectric machine is increased. Therefore, a cylinder coil hardening operation requiring a considerable time and efforts, resulting in poor operability, can be avoided.
    [0038]
    Further, the cylindrical coil 44 includes linear conductor portions extending along the longitudinal direction of the permanent magnet. For example, when the solenoid 44 is placed in hexagonal turns, portions of the turns on the cylinder axis are aligned with the linear lead portions of the hexagonal turns. Accordingly, the linear line portions in the cylindrical axis direction that couple a magnetic flux are present in the middle portion of the cylindrical turns, and therefore induced electromotive force can be effectively generated, whereby electric energy can be efficiently generated while simultaneously miniaturizing the entire dynamoelectric power Machine is realized.
    Another embodiment of the present invention will be explained in conjunction with FIG.
    FIG. 8 is a view showing another one
    Embodiment of the dynamoelectric machine shows. The dynamo-electric machine 40 is composed of a solenoid 44 electrically connected to the outside via a terminal 49, and generates an induced electromotive force, a rotor 20 that generates an induced electromotive force by rotation, a yoke 7 3 in which this corresponding elements are housed, and the like. In this embodiment, the yoke is configured to also function as an outer member. In this embodiment, the dynamoelectric machine may also include the yoke and the outer member as shown in FIG.
    The rotor 20 is composed of a cylindrical permanent magnet 45 and a shaft 46 and is rotatably supported between two points of the bearings 47, 48 which are arranged in middle positions of the bearing holding members 77, 78. Further, the shaft 46 penetrates in the permanent magnet 45 along the longitudinal direction and is fixed to a central portion of the permanent magnet 45.
    [0039]
    The yoke 73 has a cylindrical shape with both ends thereof opened. The yoke 73 is provided for magnetically connecting the magnetic poles of the permanent magnet with each other, and is used
    Use of a magnetic material formed, such as of ferritic stainless steel. The yoke 73 may be formed by laminating thin magnetic sheets, such as flat rolled magnetic steel sheets. Due to such a structure, the yoke 73 can also function as an outer member.
    A coil fixing member 41 is connected to one end side of the yoke 73. The coil fixing member 41 includes a cylindrical roller part 42 facing the permanent magnet 45. The solenoid 44 is fixed to an outer peripheral surface of the cylindrical roller member 42. The coil fixing member 41 is formed by using a resin (PPS or the like). The coil fixing member 41 can be formed by using a resin having a bending modulus of 5000 MPa or more. When the coil fixing member 41 is formed with a resin, it is possible to obtain an advantageous effect in which no eddy current is generated, so that a loss can be reduced. The coil fastener may be formed using a non-magnetic metal, such as aluminum or brass.
    The other end side of the yoke 73 and an end portion of the coil fixing member 41 have a circular ring opening, and a lid 71 on which the terminal pins 49 are mounted is fitted in the circular ring opening so as to close the circular ring opening. A hole not shown in the drawing is formed in the lid 71, and the inside surrounded by the coil fixing member 41, the yoke 73 and the lid 71 is filled with an epoxy adhesive 37 through the hole. The lid 71 may be formed together with the coil fixing member 41. In this case, a hole not shown in the drawing is formed in the coil fixing member 41, and the inside surrounded by the coil fixing member 41 and the yoke 7 3 can be filled with an epoxy adhesive through the hole.
    Further, with respect to the coil fixing member 41, a thickness of an axial end portion in the radial direction is set larger than a thickness of the cylindrical roller portion 42 in the radial direction. With respect to the coil fixing member 41, both axial end portions are formed of a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical roller portion 42 and a small outer diameter portion having an outer diameter smaller than the outer diameter of the cylindrical roller part 42 is. Although the axial end portions of the coil fixing member 41 are formed of the large outer diameter portion and the small outer diameter portion, the axial end portions of the coil fixing member 41 are not limited to such a shape as long as the thicknesses of the axial end portions in the radial direction are greater than the thickness of the cylindrical Roller part 42 in the radial direction. For example, the axial end portion of the coil fixing member 41 may be formed of a large inner diameter portion having an inner diameter larger than an inner diameter of the cylindrical roller portion 42 or a smaller inner diameter portion having an inner diameter smaller is an inner diameter of the cylindrical cylindrical part 42. That is, since the thicknesses of the axial end portions of the
    The coil fixing member 41 in the radial direction is larger than the thickness of the cylindrical roller member 42 in the radial direction, the rigidity of the cylindrical roller member 42 increases, so that the deformation of the cylindrical roller member 42 can be suppressed by the axial end portions of the coil fixing member 41, whereby the thickness of the cylindrical roller member 42 can be reduced. Further, since the deformation of the cylindrical roller member 42 can be suppressed, the gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 and the gap formed between the outer peripheral surface of the cylindrical roller member 42 and the inner peripheral surface of the yoke 73 is formed to be reduced. Accordingly, the gap formed between the permanent magnet 45 and the yoke 73 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine.
    [0040]
    A bearing holding member 78 is connected to one end side of the inner peripheral surface of the coil fixing member 41, and a bearing holding member 77 is connected to the other end side of the inner peripheral surface of the coil fixing member 41, and the
    Bearing members 78, 77 are connected to the bearings 47 and 48, respectively.
    39
    Due to such a structure, the permanent magnet 45 and the coil fixing member 41 can be concentrically arranged with high accuracy, and therefore, a gap formed between the outer peripheral surface of the permanent magnet 45 and the inner peripheral surface of the cylindrical roller member 42 can be reduced. Accordingly, a gap formed between the permanent magnet 45 and the outer member 51 can be reduced, thus increasing the energy efficiency of the dynamoelectric machine. The arrangement of the bearings 47, 48 is not limited to the above case. That is, the bearings 47, 48 may be disposed substantially at the same positions as in the embodiment shown in FIG.
    [0042]
    The present invention is not limited to the above embodiments, and various modifications are conceivable without departing from the gist of the present invention. For example, as shown in FIG. 9, holes may be formed in the cylindrical roller part 42 of the coil fixing member 41. By forming the holes, the dynamoelectric machine can be made lightweight. Further, the flow of an eddy current, which is generated when the coil fixing member 41 is formed using a conductive material, can be interrupted by a hole, and therefore, a loss caused by the eddy current can be reduced. Accordingly, the energy efficiency of the dynamoelectric machine can be increased. 40 [0043]
    Further, in the embodiment, it is needless to say that the winding frame is not limited to the hexagonal winding frame and all the polygonal winding frames may be used.
    In this embodiment of the dynamoelectric machine, the explanation has been made with respect to the generator. However, the dynamo-electric machine may also be used as a motor that rotates a permanent magnet, for example, by applying an AC voltage to the three-phase coils with sequential connection.
    DESCRIPTION OF REFERENCE NUMBERS AND SIGNS
    1: handpiece for dental treatment 2: head part 3: handle part 20: rotor
    21: tool insert turbine 22: treatment tool 31: LED 32: electric line 33: air passage 41
    37: Turbine blade 38: Rear portion of the housing 39: Front portion of the housing 40: Dynamoelectric machine 41: Coil fixing member 42: Cylindrical roller member 43, 73: Yoke 44: Cylindrical coil 45: Permanent magnet 46: Shaft 47, 48: Bearing 50: Outer member 51 : Air supply pipe 52: Water supply pipe 53, 54: Bearing support 61: Winding frame 62: Winding 63: Belt 64: Winding rod 42 65: Rolled cylindrical bobbin 66: Cylinder forming device 71: Lid 77, 78: Bearing support member
    权利要求:
    Claims (18)
    [1]
    43 CLAIMS 1. A dynamoelectric machine comprising: a permanent magnet that circumferentially arranges a plurality of magnetic poles on an outer periphery thereof; a coil fixing member having a cylindrical roller part at a position where the cylindrical roller part faces the permanent magnet with an air gap formed therebetween; a solenoid whose entire surface is fixed to an outer peripheral surface of the cylindrical roller part of the coil fixing member; and a yoke made of a magnetic material and disposed at a position where the yoke faces an outer peripheral portion of the cylindrical coil.
    [2]
    2. The dynamoelectric machine according to claim 1, further comprising an outer member provided on an outer peripheral side of the yoke.
    [3]
    3. The dynamoelectric machine according to claim 1, wherein the cylindrical coil is formed into a cylindrical shape by making turns wound around a polygonal winding frame into a planar plate shape by causing the turns to fall in the direction of the winding frame axis, and then the turns around the outer periphery of the 44 cylindrical



    Roll part of the coil fastener to be wound, and the cylindrical coil comprises linear conductor parts which extend along the longitudinal direction of the permanent magnet.
    [4]
    4. The dynamoelectric machine according to claim 1, wherein the cylindrical roller part of the coil fixing member and the substantially entire inner peripheral surface of the cylindrical coil are fixed to each other by an adhesive.
    [5]
    5. The dynamoelectric machine according to claim 1, wherein a thickness of an end portion of the coil fixing member on a cylinder axis in the radial direction is set larger than a thickness of the cylindrical roller part in the radial direction.
    [6]
    6. The dynamoelectric machine according to claim 5, wherein the coil fixing member includes a large outer diameter portion having an outer diameter larger than an outer diameter of the cylindrical rolling member at an end portion of the cylindrical rolling member on a cylinder axis.
    [7]
    7. A dynamoelectric machine according to claim 1, wherein a length of the yoke in the radial direction is set larger than a length of the cylindrical roller member in the radial direction.
    [8]
    8. The dynamoelectric machine according to claim 7, wherein the cylindrical roller part is disposed on an inner peripheral side of the cylindrical coil 45 45

    And the yoke is disposed on an outer periphery of the solenoid, so that the cylindrical coil is fitted between the cylindrical roller and the yoke.
    [9]
    A dynamoelectric machine according to claim 1, wherein said coil fixing member is formed by using a resin.
    [10]
    10. The dynamoelectric machine according to claim 9, wherein the coil fixing member is formed by using a resin having a bending elastic modulus of 5000 MPa or more.
    [11]
    A dynamoelectric machine according to claim 2, wherein said outer member is formed by using a resin.
    [12]
    The dynamoelectric machine according to claim 11, wherein the outer member is formed by using a resin having a flexural elastic modulus of 5000 MPa or more.
    [13]
    13. The dynamoelectric machine according to claim 1, wherein the cylindrical roller part of the coil fixing member has a hole.
    [14]
    14. The dynamoelectric machine according to claim 1, wherein the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine includes a bearing disposed on the shaft at a position different from a position where the permanent magnet is disposed, and 46



    an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of the bearing holding member which is spaced from the coil fixing member.
    [15]
    15. The dynamoelectric machine according to claim 1, wherein the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine comprises a bearing disposed on the shaft at a position different from a position where the permanent magnet is disposed, and an outer peripheral surface of the bearing is brought into contact with an inner peripheral surface of the coil fixing member or an inner peripheral surface of the bearing holding member, which is disposed on a peripheral inside of the coil fixing member.
    [16]
    16. The dynamoelectric machine according to claim 1, wherein the permanent magnet is mounted on a rotatable shaft, the dynamoelectric machine comprises two bearings arranged on the shaft at positions different from a position where the permanent magnet is disposed, and a rotor outer peripheral surface of a bearing is brought into contact with an inner peripheral surface of the coil mounting member or inner peripheral surface of the bearing support member disposed on an inner peripheral side of the coil mounting member, and an outer peripheral surface of the other bearing is brought into contact with an inner peripheral surface of the bearing support member; which is arranged at a distance from the coil fastening element.
    [17]
    17. The dynamoelectric machine of claim 14, wherein the bearings are disposed at end portions of the shaft.
    [18]
    18. Handpiece for dental or medical treatment, comprising: the dynamoelectric machine according to claim 14 to 17; a turbine blade · disposed on the shaft at a position different from the positions at which the permanent magnet and the bearings are arranged; a light emitting part electrically connected to the cylindrical coil; and an air supply pipe that supplies a fluid for rotating the turbine blade.
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    同族专利:
    公开号 | 公开日
    JP2011101579A|2011-05-19|
    JP5623171B2|2014-11-12|
    JP5623170B2|2014-11-12|
    JP2011101578A|2011-05-19|
    AT511024B1|2017-12-15|
    AT511024A3|2014-12-15|
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    法律状态:
    2021-05-15| MM01| Lapse because of not paying annual fees|Effective date: 20200901 |
    优先权:
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    JP2009232773|2009-10-06|
    JP2010165931A|JP5623171B2|2009-10-06|2010-07-23|Rotating electric machine and dental or medical handpiece|
    JP2010165930A|JP5623170B2|2009-10-06|2010-07-23|Rotating electric machine and dental or medical handpiece|
    PCT/JP2010/064928|WO2011043142A1|2009-10-06|2010-09-01|Rotating electric machine, and dental or medical handpiece|
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