• 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:
    Provided is a power transmission device which can prevent lubricant liquid from having raised temperature and leaking out. A power transmission device comprising a casing, an input shaft arranged in the casing along a lateral direction, and an output shaft arranged along an axial direction of the input shaft and connected to the input shaft via a clutch, and storing lubricant liquid to be supplied to the clutch at a lower part of the casing, characterised by compriseing: a scooping part scooping upward the lubricant liquid stored in the lower part of the casing; a guide channel guiding the lubricant liquid conveyed by the scooping part to the clutch; and a supply path provided at the guide channel to supply lubricant liquid to the clutch.
    公开号:NL2016922A
    申请号:NL2016922
    申请日:2016-06-09
    公开日:2016-12-12
    发明作者:Kamihigashi Hiroyuki；Hattori Shinji；Nishi Takayuki
    申请人:Tsubaki E&M Co；
    IPC主号:
    专利说明:

    POWER TRANSMISSION DEVICE
    [Technical Field] [0001] The present invention relates to a power transmission device which transmits power from an input shaft to an output shaft.
    [Background Art] [0002] Conventionally, a power transmission device which connects an input shaft to an output shaft via a power transmission member such as a clutch or gear wheel to transmit power has been proposed.
    [0003] Japanese patent application laid-open No. 2005-188729 discloses a structure in which an input shaft protruding from one side of a housing is arranged coaxially with an output shaft protruding from the other side of the housing, and the input shaft is connected to the output shaft inside the housing through a clutch or the like.
    [0004] Lots of lubricant oil (lubricant liquid) is stored in the housing, while the lower parts of the input shaft and the output shaft are soaked in the lubricant oil. Thus, when the input shaft and the output shaft rotate, the lubricant oil is supplied to the clutch or the like.
    [Summary of Invention] [Problems to be Solved by Invention] [0005] The rotation of the input shaft and the output shaft agitates the lots of lubricant oil in the housing, which raises the temperature of the oil. As the position of the surface of the lubricant oil reaches the lower parts of the input shaft and the output shaft, the oil is likely to leak from a gap between the input/output shafts and the housing.
    [0006] The present invention has been made in view of the circumstances described above, and aims to provide a power transmission device capable of preventing lubricant liquid from having a raised temperature or leaking out.
    [Means for Solving Problems] [0007] A power transmission device according to the present invention including a casing, an input shaft arranged in the casing along a lateral direction, and an output shaft arranged along an axial direction of the input shaft and connected to the input shaft via a clutch, and storing lubricant liquid to be supplied to the clutch in a lower part of the casing further comprises:a scooping part scooping upward the lubricant liquid stored in the lower part of the casing; a guide channel guiding the lubricant liquid conveyed by the scooping part to the clutch; and a supply path provided at the guide channel to supply lubricant liquid to the clutch.
    [0008] According to the present invention, the lubricant liquid stored in the lower part of the casing is scooped and brought upward to be supplied to the clutch, which is thereby lubricated, even though the surface of the lubricant oil is lowered.
    [0009] In the power transmission device according to the present invention, the scooping part has a rotary disk externally fitted onto the output shaft.
    [0010] According to the present invention, the rotation of the output shaft rotates the rotary disk, to convey the lubricant liquid stored in the lower part of the casing to the upper side.
    [0011] The power transmission device according to the present invention comprises a feed part for feeding lubricant liquid flowing out of the supply path to the clutch.
    [0012] According to the present invention, the lubricant liquid flowing out of the supply path is fed out to the clutch by the feed part.
    [0013] In the power transmission device according to the present invention, the feed part is arranged between the clutch and a guide channel.
    [0014] According to the present invention, the lubricant liquid flowing out of the guide channel is fed to the clutch through the feed part.
    [0015] In the power transmission device according to the present invention, the feed part has a feed hole located at the rotary disk for feeding lubricant liquid flowing out of the supply path to the clutch.
    [0016] According to the present invention, as the rotary disk is provided with a feed hole, the lubricant liquid flowing out of the supply path of the guide channel passes through the feed hole to be fed out to the clutch.
    [0017] In the power transmission device according to the present invention, the feed hole is so formed that an axial center of the feed hole crosses an axial center of the output shaft or is located at a skewed position with respect to the axial center of the output shaft.
    [0018] According to the present invention, the centrifugal force of the rotary disk acts on the lubricant liquid supplied to the feed hole, and the lubricant liquid is fed out to the clutch along the inner circumferential surface of the feed hole inclined with respect to the axial center of the output shaft.
    [0019] In the power transmission device according to the present invention, the feed part has a threaded cylinder externally fitted onto the output shaft with an outer circumferential surface being provided with a thread groove.
    [0020] According to the present invention, the lubricant liquid flowing out of the supply path is fed out to the clutch through the threaded cylinder.
    [0021] In the power transmission device according to the present invention, a suction port and an exhaust port are formed at the casing.
    [0022] According to the present invention, the air ventilates between the inside and the outside of the casing.
    [0023] In the power transmission device according to the present invention, a protruding part for generating air flow is formed at the rotary disk.
    [0024] According to the present invention, the air flow is generated to realize smooth ventilation of the air.
    [0025] The power transmission device according to the present invention comprises a defoaming part for defoaming lubricant liquid.
    [0026] According to the present invention, the defoaming part eliminates the bubbles in the lubricant liquid.
    [Advantageous Effects] [0027] In the power transmission device according to the present invention, the scooping part scoops to bring up the lubricant liquid, which can reduce the amount of the lubricant liquid, can suppress the agitation of the lubricant liquid and can also prevent a rise in the temperature of the lubricant liquid. Since the surface of the lubricant oil is lowered, the lubricant liquid does not easily leak out from the gap between the input/output shafts and the casing. Furthermore, the lubricant liquid stored in the lower part of the casing is conveyed to the upper side to be supplied to the clutch, which is thereby lubricated.
    [Brief Description of Drawings] [0028] FIG. 1 is a schematic section view of a power transmission device according to Embodiment 1 when viewed from the left side. FIG. 2 is a schematic section view of a transmission device when viewed from the left side, in which an input shaft, an output shaft, a power transmission unit and the like are not illustrated. FIG. 3 is a section view taken along the line III-III illustrated in FIG. 2. FIG. 4 is a section view taken along the line IV-IV illustrated in FIG. 2. FIG. 5 is a schematic front view of the second guide channel. FIG. 6 is a partially enlarged schematic section view of a power transmission device according to Embodiment 2 when viewed from the left side. FIG. 7A is a partially enlarged schematic section view of a rotary disk with a part thereof changed. FIG. 7B is a partially enlarged schematic section view of a rotary disk with a part thereof changed. FIG. 7C is a partially enlarged schematic section view of a rotary disk with a part thereof changed. FIG. 8 is a schematic section view of a power transmission device according to Embodiment 3 when viewed from the left side. FIG. 9 is a schematic rear view of the rotary disk. FIG. 10 is a schematic section view taken along the line X-X illustrated in FIG. 9. FIG. 11 is a schematic section view of a transmission device when viewed from the left side, in which an input shaft, an output shaft, a power transmission unit and the like are not illustrated. FIG. 12 is a schematic perspective view of the structure of a tank. FIG. 13 illustrates a flow channel of lubricant liquid when viewed from the rear side.
    [Mode for Carrying Out Invention] [0029] (Embodiment 1)
    The present invention will be described below with reference to the drawings illustrating a power transmission device according to Embodiment 1. In the description below, top (upper), bottom (lower), front, back (rear), left and right as indicated in the drawings will be used. FIG. 1 is a schematic section view of the power transmission device when viewed from the left side.
    [0030] The power transmission device includes a casing 1, which has a main body la and a bearing support lc. A bearing support lc supports a bearing 3a. At a middle part of the back of the main body la, a circular opening lb is formed.
    [0031] The bearing support lc of an annular shape with its axial direction corresponding to the front-back direction is fitted into the opening lb. A flange Id is located at the back of the bearing support lc.
    [0032] A first insertion opening 11 is formed at the front part of the main body la, and an input shaft 2 is inserted into the first insertion opening 11. A bearing 2a is fitted into the first insertion opening 11. The input shaft 2 is rotatably supported by the first insertion opening 11 via the bearing 2a. A first support ring 21 is fixed to the main body la around the first insertion opening 11. The input shaft 2 is inserted into the first support ring 21. The input shaft 2 is arranged in the casing 1 along a front-back (lateral) direction, [0033] An annular space is provided between the rear part of the inner circumferential surface of the first support ring 21 and the outer circumferential surface of the input shaft 2. The annular seal member 4 is supported in the space.
    [0034] The second insertion opening 12 is formed at the middle part of the bearing support lc, while the output shaft 3 is inserted into the second insertion opening 12.
    The output shaft 3 is rotatably supported in the second insertion opening 12 via a bearing 3 a. The output shaft 3 and the input shaft 2 are coaxially positioned. The output shaft 3 is arranged along an axial direction of the input shaft 2. The second support ring 22 is fixed to the bearing support lc at the periphery of the second insertion opening 12. The output shaft 3 is inserted into the second support ring 22.
    [0035] An annular space is provided between the front part of the inner circumferential surface of the second support ring 22 and the outer circumferential surface of the output shaft 3. An annular seal member 6 is supported in the space.
    [0036] Inside the casing 1, the rear end of the input shaft 2 is connected to the front end of the output shaft 3 via a power transmission unit 30. The power transmission unit 30 comprises an outer ring 31 connected to the input shaft 2, an inner ring 32 located at the inner side of the outer ring 31 and connected to the output shaft 3, an annular one-way clutch 33 (hereinafter referred to as a clutch 33) provided between the inner ring 32 and the outer ring 31, and bearings 34, 34 provided at the front and rear sides, respectively, of the clutch 33 between the inner ring 32 and the outer ring 31. The middle part in the axial direction of the inner ring 32 protrudes in the radial direction, and the clutch 33 is externally fitted onto the protruding portion.
    [0037] A flange 2b is formed at the rear end of the input shaft 2, and is connected to the front end of the outer ring 31 with a bolt 53. The front end of the output shaft 3 is fitted into the inner ring 32. The rotation of the input shaft 2 rotates the outer ring 31, and the rotation of the outer ring 31 is transmitted to the inner ring 32 via the clutch 33, to thereby rotate the output shaft 3.
    [0038] An annular body 35 with its axial direction corresponding to the front-back direction is provided at the rear end of the outer ring 31. A protruding part 35a protruding forward is provided at the front inner circumferential side of the annular body 35. The front inner circumferential surface of the annular body 35 forms a parallel surface 35c which is in parallel with the axial center of the output shaft 3, while the rear inner circumferential surface of the annular body 35 is continuous with the parallel surface 35c and forms an inclined surface 35d with the diameter at the front side larger than that at the rear side. The inclined surface 35d may be extended to the front side without the parallel surface 35c being formed.
    [0039] A rotary disk 36 having a through hole in the middle is located at the rear part of the annular body 35 and is externally fitted onto the output shaft 3. The rotary disk 36 includes an annular fitting part 36a which is externally fitted onto the output shaft 3, a ring 36b which is continuous with the outer circumferential part of the fitting part 36a, and a tubular protruding part 36c protruding forward from the outer circumferential part of the ring 36b. Because of the ring 36b and the protruding part 36c, the outer circumferential part of the rotary disk 36 has an L-shaped cross section.
    [0040] The fitting part 36a is located at the inner side of the annular body 35, and the position of the fitting part 36a in the axial direction is substantially the same as the position of the annual body 35 in the axial direction. At the rear end in the outer circumferential part of the fitting part 36a, a protruding part 36d is formed which protrudes diagonally rearward and outward in the radial direction. The ring 36b is located continuously with the protruding part 36d while its axial direction corresponds to the front-back direction.
    [0041] In the radial direction, the outer circumferential surface of the ring 36b is located at the outer side of the outer circumferential surface of the outer ring 31. The front outer circumferential surface of the fitting part 36a forms an opposing surface 36e opposed to the parallel surface 35c of the annular body 35.
    [0042] In the radial direction, the opposing surface 36e is located at a slightly inner side of the inner circumferential surface of the inner ring 32. In the radial direction, the opposing surface 36e may be located at a position corresponding to the inner circumferential surface of the inner ring 32 or at an outer side of the inner circumferential surface, the position of the opposing surface 36e may be appropriately set in accordance with the specification of the power transmission device. The rear outer circumferential surface of the fitting part 36a (outer circumferential surface at the protruding part 36d) forms an inclined surface 36f which is continuous with the opposing surface 36e and having a diameter at the front side larger than that at the rear side. The inclined surface 36f of the fitting part 36a is opposed to the inclined surface 35d of the annular body 35. The inclined surface 36f of the fitting part 36a, the inclined surface 35d of the annular body 35, the parallel surface 35c, the opposing surface 36e, the bearing 34 and the inner ring 32 form an annular storage 37.
    [0043] The protruding part 36d of the fitting part 36a is provided with a feed hole 36g feeding out lubricant liquid 100, which will be described later. When viewed from the right side or the left side, the feed hole 36g penetrates the protruding part 36d such that the axial center of the feed hole 36g crosses the axial center of the output shaft 3, or the axial center of the feed hole 36g is located at a skewed position from the axial center of the output shaft 3. The feed hole 36g is so inclined that the outlet at the front side thereof is oriented to the bearing 34, i.e., to a position between the inner ring 32 and the outer ring 31.
    [0044] Inside the casing 1, at the lower part of the main body la, a net 40 having an L-shape in a side view is provided. Lubricant liquid 100 is stored in the casing 1. The net 40 is provided to remove dust and dirt in the lubricant liquid 100 and defoam the lubricant liquid 100. The net 40 functions as a defoaming part. The surface of the lubricant liquid 100 is located lower than the outer ring 31, the first insertion hole 11 and the second insertion hole 12 when the power transmission device drives (when at least the output shaft3 rotates). Note that the surface of the lubricant liquid 100 may be located upper than a lower end of the outer ring 31 when the power transmission device does not drive (when the input shaft 2 and the output shaft 3 do not rotate). The protruding part 36c of the rotary disk 36 is soaked in the lubricant liquid 100 stored in the casing 1.
    [0045] FIG. 2 schematically illustrates a power transmission device excluding the illustration of the input axis 2, the output axis 3 and the power transmission unit 30 and the like. Fig. 3 is a section view taken along the line III-III illustrated in FIG. 2. FIG. 4 is a section view taken along the line IV-IY illustrated in FIG. 2. FIG. 5 is a schematic front view of the second guide channel 42.
    [0046] The first guide channel 41 for guiding the lubricant liquid 100 is provided at the inner surface of the upper part of the main body la. The first guide channel 41 has a shape of a semi-circular arc. The first guide channel 41 is located above the rotary disk 36. The first guide channel 41 has an upper plate part 41a, a front plate part 41b and a rear plate part 41c, and has a rail shape with the lower side thereof opened. The lower end of the front plate part 41b is bent rearward, and thus the front plate part 41b has a J-shaped side cross section. The lower end of the rear plate part 41c is bent forward, and the rear plate part 41c also has an inverted J-shaped side cross section.
    [0047] A tank 43 is provided at the right part of the main body la. The tank 43 has a vertically-long rectangular parallelepiped shape, and is located at the lower side of the right end of the first guide channel 41. An opening (not illustrated) is formed at the upper part of the tank 43. A first hole 43 a of a vertically long rectangular shape is formed at the lower rear portion of the left part of the tank 43. A second hole 43b of a rectangular shape with the upper side thereof opened is formed at the upper portion of the front part of the tank 43. A third hole 43c is formed at the lower portion of the rear part of the tank 43.
    [0048] A tank 44 is provided at the left part of the main body la. The tank 44 has a vertically-long rectangular parallelepiped shape and is located at the lower side at the left end of the first guide channel 41. An opening (not illustrated) is formed at the upper part of the tank 44. A vertically-long rectangular first hole (not illustrated) is formed at the lower rear portion of the right part of the tank 44. A rectangular second hole with its upper side opened (not illustrated) is formed at the upper portion of the front part of the tank 44. A third hole 44c is formed at the lower portion of the rear part of the tank 44. The tanks 43 and 44 at the left and right sides respectively are formed to be substantially symmetrical to each other with respect to the vertical plane.
    [0049] The two tanks 43 and 44 are connected with each other by the second guide channel 42 extending in the right-left (lateral) direction. As illustrated in FIG. 5, the second guide channel 42 is formed in a pipe-like shape with a vertically-long rectangular side cross section, for example. It is to be noted that the second guide channel 42 is not limited to have a pipe-like shape but may also have another shape such as a gutter-like shape. Three supply holes 42a, 42a, 42a (supply paths) are arranged laterally side by side at the middle part in the right-left direction at the front part of the second guide channel 42. It is to be noted that the number of the supply holes 42a may be less than or more than three.
    [0050] The first hole 43a of the right tank 43 and the first hole of the left tank 44 are continuous with the right and left ends of the second guide channel 42.
    [0051] As illustrated in FIG. l,the second guide channel 42 is located at the rear side of the fitting part 36a of the rotary disk 36. The supply hole 42a is located at the upper portion of the front part of the second guide channel 42, and is located at the upper side of the feed hole 36g of the rotary disk 36.
    [0052] As illustrated in FIG. 4, inside the casing 1, a protrusion 13 which protrudes in the left direction is provided at the middle part in the upper-lower (vertical) direction of the right part of the main body la. The protrusion 13 is formed at the front portion of the right part of the main body la and extends in the front-back direction. The protrusion 13 is provided with an L-shaped plate 14 formed in an L-shape in a plan view. The L-shaped plate 14 has a right plate 14a which extends in the front-back direction and is in parallel with the vertical direction, and a front plate 14b protruding toward left direction from the front end of the right plate 14a.
    [0053] The right plate 14a is opposed to the right part of the main body la, and is connected to the tip end of the protrusion 13 with a bolt. As illustrated in FIG. 2, the rear end of the right plate 14a is adjacent to the second hole 43b of the right tank 43. The front plate 14b is opposed to the front part of the main body la. Spaces are formed between the right plate 14a and the right part of the main body la and between the front plate 14b and the front part of the main body la, respectively, the spaces forming a communication channel 14c which communicates to a passage 15 described later.
    [0054] The passage 15 is formed at the front part of the main body la. A passage 21a and a discharge path 21b are vertically arranged at the right part on the rear surface of the first support ring 21. The passage 21a is located adjacent to the passage 15. A communication channel If is formed at a portion of the right part of the main body la. An introduction path 22a and a discharge path 22b are arranged vertically at the lower right portion on the front surface of the second support ring 22.
    [0055] An introduction passage lg for introducing the lubricant liquid 100 is provided at the bearing support lc. The introduction passage lg, the communication channel If and the introduction path 22a communicate with one another. At the lower side of the introduction passage lg, a discharge passage lh is formed at the bearing support lc.
    The discharge passage lh and the discharge path 22b communicate with each other.
    [0056] In order for the lubricant liquid 100 stored in the tank 44 to move, the same structure as that of the components such as the communication channel 14c, the passage 21a, the discharge path 21b, the introduction path 22a, the discharge path 22b, the introduction passage lg, and the discharge passage lh as described above is arranged symmetrically in the left part of the main body la, which will not be described in detail.
    [0057] Next, the feeding of the lubricant liquid 100 is described. In a general one-way clutch, only the output shaft 3 rotates at idling. When geared, the one-way clutch is engaged at the input shaft 2 side and rotates at the same rotational speed as that of the output shaft 3. The rotation of the output shaft 3 rotates the rotary disk 36, and thereby the lubricant liquid 100 stored at the lower part of the casing 1 is scooped upward to reach the first guide channel 41. The lubricant liquid 100 reaching the first guide channel 41 moves downward inside the first guide channel 41 by the gravitational force to be stored in the right and left tanks 43 and 44.
    [0058] The lubricant liquid 100 stored in the right and left tanks 43 and 44 flows out of the first hole 43a of the right tank 43 and of the first hole of the left tank 44, and moves through the second guide channel 42. The lubricant liquid 100 is discharged from the supply hole 42a of the second guide channel 42 to reach the feed hole 36g of the rotary disk 36. Since a predetermined pressure acts on the lubricant liquid 100 discharged from the supply hole 42a, the lubricant liquid 100 is discharged from the supply hole 42a at a speed allowing the lubricant liquid 100 to at least reach the feed hole 36g.
    [0059] A centrifugal force caused by the rotation of the rotary disk 36 acts on the lubricant liquid 100 which reached the feed hole 36g, so that the lubricant liquid 100 is fed out along the inner circumferential surface of the feed hole 36g inclined with respect to the axial center of the output shaft 3, and is stored in the storage 37. That is, the rotary disk 36 has a function of a centrifugal pump. The feed hole 36g configures a feed part which feeds out the lubricant liquid 100 flowing out of the supply hole 42a to the clutch 33. The lubricant liquid 100 stored in the storage 37 moves toward the bearing 34, the clutch 33, the outer ring 31 and the inner ring 32 to lubricate these components before reaching the lower part of the casing 1.
    [0060] The lubricant liquid 100 stored in the tanks 43 and 44 flows out of the second hole 43b, passes through the communication channel 14c, the passage 15 and the passage 21a, and reaches the bearing 2a formed at the first insertion opening 11. The lubricant liquid 100 lubricates the bearing 2a, passes through the discharge path 21b, and reaches the lower part of the casing 1.
    [0061] The lubricant liquid 100 stored in the tanks 43 and 44 flows out of the third hole 44c, passes through the communication channel If, the introduction passage lg and the introduction path 22a, and reaches the bearing 3a provided at the second insertion opening 12. The lubricant liquid 100 lubricates the bearing 3a, passes through the discharge path 22b and the discharge passage lh, and then reaches the lower part of the casing 1.
    [0062] The lubricant liquid 100 which reached the lower part of the casing 1 is scooped upward again by the rotary disk 36, to lubricate the power transmission unit 30, bearings 2a and 3a. That is, the lubricant liquid 100 circulates in the casing 1. While the rotation of the rotary disk 36 lowers the surface of the lubricant liquid 100 stored in the casing 1, the rotary disk 36 is so designed that the protruding part 36c is soaked in the lubricant liquid 100 at the time of rotation. Thus, the rotary disk 36 is able to keep conveying the lubricant liquid 100.
    [0063] In the power transmission device according to Embodiment 1, the rotary disk 36 scoops to bring up the lubricant liquid 100, which can reduce the amount of the lubricant liquid 100, suppress agitation of the lubricant liquid 100, and prevent the temperature of the lubricant liquid 100 from being raised. Since the surface of the lubricant oil is lowered, the lubricant liquid 100 does not easily leak out from the gap between the input shaft 2 or the output shaft 3 and the casing 1. Furthermore, the lubricant liquid 100 stored in the lower part of the casing 1 is conveyed upward to be supplied to the clutch 33, which is thereby lubricated.
    [0064] As the rotary disk 36 is provided with the feed hole 36g, the lubricant liquid 100 flowing out of the supply hole 42a of the second guide channel 42 passes through the feed hole 36g to be fed out to the clutch 33. The centrifugal force of the rotary disk 36 acts on the lubricant liquid 100 supplied to the feed hole 36g, so that the lubricant liquid 100 is fed out to the clutch 33 along the inner circumferential surface of the feed hole 36g inclined with respect to the axial center of the output shaft 3.
    [0065] The ingredient of the lubricant liquid 100 is not specifically limited but may be any liquid with lubricity. An example of the lubricant liquid includes liquid containing lubricant oil or an ingredient other than oil with lubricity (ionic liquid, for example).
    [0066] (Embodiment 2)
    The present invention will now be described with reference to the drawings illustrating a power transmission device according to Embodiment 2. FIG. 6 is a partially enlarged schematic section view of the power transmission device.
    [0067] At the back of the second guide channel 42, the rotary disk 36 is externally fitted onto the output shaft 3. At the front of the second guide channel 42, a threaded cylinder 60 is externally fitted and fixed onto the output shaft 3. A thread groove 60a is formed on the outer circumferential surface of the threaded cylinder 60. The front circumferential part of the threaded cylinder 60 protrudes forward, and the protruding portion is inserted between the inner ring 32 and the outer ring 31.
    [0068] A cylindrical liquid receiver 61 is provided outside the threaded cylinder 60.
    The liquid receiver 61 includes a cylindrical part 61a, a first protruding part 61b located in a midway portion of the cylindrical part 61 and protruding radially outward from the cylindrical part 61a, and a second protruding part 61c located at one end of the cylindrical part 61a and protruding radially inward from the cylindrical part 61 a. The other end of the cylindrical part 61a is fitted into the outer ring 31 such that one end of the cylindrical part 61a is positioned at the front side. The first protruding part 61b is opposed to the rear end of the outer ring 31 and is fixed to the outer ring 31 with a bolt 55. The second protruding part 61c is located between the threaded cylinder 60 and the second guide channel 42 in the front-back direction. The thread groove of the threaded cylinder 60 is opposed to the inner circumferential surface of the liquid receiver 61.
    [0069] The lubricant liquid 100 is supplied from the supply hole 42a of the second guide channel 42 toward the threaded cylinder 60. The lubricant liquid 100 is supplied to the inside of the liquid receiver 61. The rotation of the output shaft 3 rotates the threaded cylinder 60 to feed out the lubricant liquid 100 to the bearing 34 and the clutch 33. The lubricant liquid 100 moves through the liquid receiver 61 toward the bearing 34 and the clutch 33. That is, the threaded cylinder 60 functions as a screw pump. The second protruding part 61c prevents the lubricant liquid 100 supplied to the liquid receiver 61 from leaking out to the rear side.
    [0070] Components according to Embodiment 2 that are similar to those in Embodiment 1 are denoted by the same reference codes and will not be described in detail. (Variation) [0071] FIG. 7A-7C are partially enlarged schematic section views of a rotary disk 36 with a part thereof changed. Though the outer circumferential part of the rotary disk 36 has an L-shaped cross section because of the ring 36b and the protruding part 36c in the power transmission device described above, the shape of the rotary disk 36 is not limited thereto.
    [0072] For example, as illustrated in FIG. 7A, the rotary disk 36 may be provided with a projection 36h protruding from the protruding end of the protruding part 36c toward the axial center of the rotary disk 36. The projection 36h causes the rotary disk 36 to have a hook-like cross section. Moreover, as illustrated in FIG. 7B, the protruding part 36c may be provided with a through hole 36i penetrating in the radial direction. Furthermore, as illustrated in FIG. 7C, the protruding part 36c may be eliminated.
    [0073] (Embodiment 3)
    The present invention will be described below with reference to the drawings illustrating a power transmission device according to Embodiment 3. FIG. 8 is a schematic section view of the power transmission device when viewed from the left side, FIG. 9 is a schematic rear view of the rotary disk 36, and FIG. 10 is a schematic section view taken along the line X-X illustrated in FIG. 9.
    [0074] At the ring 36b of the rotary disk 36, multiple through holes 36k are arranged at equal intervals in the circumferential direction. A protruding part 36m protruding forward is formed at the inner circumferential part of the ring 36b. At the rear surface of the ring 36, multiple fins 361 are radially arranged side by side in the circumferential direction.
    [0075] At the rear side of the inner ring 32, an annular screw pump 63(a feed part) is externally fitted and fixed onto the output shaft 3. A thread groove 63 a is formed on the outer circumferential surface of the screw pump 63. The protruding part 36m of the rotary disk 36 is externally fitted onto the screw pump 63. When the output shaft 3 rotates, the screw pump 63 and the rotary disk 36 also rotate. A space is formed between the inner circumferential part of the ring 36b and the output shaft 3.
    [0076] At the rear portion of the inner circumferential part of the annular body 35, an inward protruding ring 35e protruding radially inward is provided.
    [0077] FIG. 11 is a schematic section view of a transmission device when viewed from the left side, in which the input shaft 2, the output shaft 3, the power transmission unit 30 and the like are not illustrated. FIG. 12 is a schematic perspective view of the structure of a tank 143.
    Tanks are provided respectively at the right part and the left part of the main body la. Note that the right and left tanks are configured symmetrical to each other, and have the same configuration except for their right-left positions. Only the right tank 143 will thus be described and the left tank 144(See Fig. 13) will not be described in detail here. The left tank 144 should be understood as symmetrical structure with respect to the right tank 143.
    [0078] The tank 143 includes a rear tank 143a having an L shape in the rear view. In front of the rear tank 143 a, a front tank 143b is provided. The left side portion of the upper part of the front tank 143b extend upward, while an opening 143f is formed at the upper surface of the left side portion. The upper surface of the upper right side portion of the front tank 143b forms a top surface 143j. The lower part 143c of the front tank 143b is continuous with the rear tank 143a.
    [0079] Through holes 143g are formed respectively at the right and lower left portions on the rear surface of the rear tank 143a. At the top surface of the rear tank 143a, an intake port 143h taking in the lubricant liquid 100 is formed. At the right part of the rear tank 143a, an opening 143i is formed. The opening 143i is so positioned as to face the top surface 143j.
    [0080] The tank 143 is fixed to the right part of the main body la such that the right plate 14a of the L-shaped plate 14 and the protruding part 13 are located between an upper part 143 d of the front tank 143b and the right part of the main body la. The opening 143i is located at the front side of the communication channel 14c (see FIG. 4). The intake port 143h is arranged to face the lower end of the first guide channel 41.
    [0081] The lubricant liquid 100 supplied from the first guide channel 41 to the intake port 143h is stored in the tank 143. The stored lubricant liquid 100 passes through the opening 143i and through the communication channel 14c, to flow forward. The lubricant liquid 100 also passes through the through holes 143g to flow rearward. The dimension of the through hole 143, the number of the through holes 143g and so forth are set such that a predetermined amount of lubricant liquid 100 is supplied. Furthermore, the opening 143f facilitates the defoaming of the lubricant liquid 100.
    [0082] As illustrated in FIG. 11, the second support ring 22 is provided with the through hole 22e penetrating in the front-back direction. The through hole 22e is located near the second insertion opening 12. The filter 22f is inserted into the through hole 22e. The bearing support lc is provided with a suction port 70 which is coaxial with the through hole 22e while penetrating the bearing support lc. The suction port 70 is positioned next to the second insertion opening 12.
    [0083] A first exhaust port 71 penetrating vertically is formed at the middle portion in the front-back direction at the upper part of the main body la. A filter 71a is fitted into the first exhaust port 71.
    [0084] At the upper part of the main body la, a vertically penetrating second exhaust port 72 is formed in front of the first exhaust port 71. The diameter at the upper side of the second exhaust port 72 is larger than the diameter at the lower side thereof, the upper part of the second exhaust port 72 extending to the rear side. A filter 72a is provided at the upper opening of the second exhaust port 72.
    [0085] At the upper portion of the front part of the main body la, a third exhaust port 73 penetrating in the front-back direction is provided. A filter 73a is fitted into the third exhaust port 73.
    [0086] As described earlier, the rotary disk 36 is provided with multiple fins 361. Moreover, the position of the suction port 70 is closer to the axial center of the input shaft 2 and the output shaft 3 compared to the positions of the first to third exhaust ports 71-73. Thus, when rotating, the rotary disk 36 functions like a centrifugal pump, taking in the outside air from the suction port 70 and discharging the air from the first to third exhaust ports 71-73.
    [0087] FIG. 13 illustrates a flow path of the lubricant liquid 100 when viewed from the rear side. In FIG. 13, to facilitate the understanding, the structures corresponding to the flow path are indicated by solid lines whereas the other structures are indicated by broken lines. As illustrated in FIG. 13, two communication channels 101, 101 are provided at the lower right portion of the rear part of the main body la. The positions of the two communication channels 101 correspond to the respective through holes 143g in the right tank 143.
    [0088] Also at the lower left portion of the rear part of the main body la, two communication channels 101, 101 are provided as in the lower right portion. The positions of the two communication channels 101 correspond to the positions of the respective through holes 144g in the left tank 144.
    [0089] As illustrated in FIG. 13, two flow paths 102, 102 are provided at the lower right portion of the bearing support lc. Each flow path 102 extends in the radial direction of the bearing support lc, and is connected to the end of the radially inner side of the flow path 102. The opening of each flow path 102 located at the radially outer side communicates with the communication channel 101.
    [0090] As in the lower right portion, two flow paths 102, 102 are also provided at the lower left portion of the bearing support lc. The opening of each flow path 102 located at the outer side in the radial direction communicates with the communication path 101.
    [0091] The second guide channel 142 is provided at the front side of the bearing support lc. The second guide channel 142 comprises a flow path part 142a with the shape of a semi-circular arc and a fixed part 142b. A flow path is formed in the flow path part 142a. The fixed part 142b is connected to the midway portion of the flow path part 142a via the connecting part 142c and is fixed to the front part of the bearing support lc.
    [0092] As illustrated in FIG. 8, an outlet 142e (supply path) which is continuous with the flow path and protruding forward is formed at the front part of the inner circumferential side of the flow path part 142a. The outlet 142e is provided over the entire flow path part 142a along the inner circumference thereof. The outlet 142e is arranged between the inner circumferential part of the ring 36b and the output shaft 3.
    [0093] The second guide channel 142 is provided with two connecting parts 142c, which protrude from the midway portion of the flow path part 142a to both right and left sides, respectively. A flow path is formed inside the connecting part 142c.
    [0094] An inlet 142d is provided at the rear side of the fixed part 142b. The flow path part 142a communicates with the inlet 142d via the connecting part 142c. The inlet 142d at each of the right and left sides communicates with the opening of each flow path 102 located at the inner side in the radial direction.
    [0095] Supplying of the lubricant liquid 100 will now be described. The rotation of the output shaft 3 rotates the rotary disk 36 to scoop upward the lubricant liquid 100 stored in the lower part of the casing 1 so that the lubricant liquid 100 reaches the first guide channel 41. The lubricant liquid 100 that reached the first guide channel 41 flows downward in the guide channel 41 due to the gravitational force to be stored in the right tank 143 and the left tank 144. The movement of the lubricant liquid 100 stored in the right tank 143 will be described below. As the movement of the lubricant liquid 100 stored in the left tank 144 is similar to that of the lubricant liquid 100 stored in the right tank 143, the description thereof will not be repeated.
    [0096] The lubricant liquid 100 inside the tank 143 passes through the through hole 143g, the communication channel 101 of the main body la, and the flow path 102 of the bearing support lc. The lubricant liquid 100 enters the inlet 142d, passes through the connecting part 142c and the flow path part 142a (see FIG. 13), and is discharged from the outlet 142e (see FIG. 8). The lubricant liquid 100 discharged through the outlet 142e reaches the vicinity of the protruding part 36m of the rotary disk 36, is fed out by the screw pump 63 toward the bearing 34, clutch 33, outer ring 31 and inner ring 32 to lubricate these components, and reaches the lower part of the casing 1.
    [0097] The lubricant liquid 100 stored in the tank 143 passes through the communication channel 14c through the opening 143i and flows forward. [0098] In the power transmission device according to Embodiment 3, the rotary disk 36 is provided with fins 361, which generates air flow inside the casing 1, to take in the outside air through the suction port 70 and to discharge the air from the first exhaust ports 71-73. The air makes contact with components inside the casing 1 and cools the components, which suppresses increase in the temperature inside the casing 1. While being stored in the tank 143, the lubricant liquid 100 may be defoamed. The tank 143 functions as a defoaming part.
    [0099] Furthermore, the filters 22f as well as 71a-73a can prevent foreign substances from intruding into the casing 1. The dimension, number and the like of the through hole(s) 143g, 144g are so set that a predetermined amount of lubricant liquid 100 is supplied therethrough.
    [0100] The configuration parts of the power transmission device according to Embodiment 3 that are similar to those in Embodiment 1 or 2 are denoted by the same reference codes and are not described in detail.
    [0101] The embodiments disclosed herein are to be construed as illustrative and not restrictive in all aspects. The scope of the invention is defined by the appended claims rather than by the description preceding them, and all changes that fall within metes and bounds of the claims, or equivalence of such metes and bounds thereof are therefore intended to be embraced by the claims.
    [Description of Reference Codes] [0102] 1 casing 2 input shaft 3 output shaft 33 clutch 36 rotary disk (scooping part) 36g feed hole (feed part) 361 fin (protruding part) 40 net (defoaming part) 41 first guide channel 42 second guide channel 42a supply hole (supply path) 60 threaded cylinder (feed part) 70 suction port 71 first exhaust port 72 second exhaust port 73 third exhaust port 7 la-73 a filter 100 lubricant liquid 142 second guide channel 142e an outlet (supply path) 143 oil tank (defoaming part) 143f opening
    权利要求:
    Claims (10)
    [1]
    1. a power transmission device comprising a housing (1); an input shaft (2) arranged in the housing along a lateral direction; and an output shaft (3) arranged along an axial direction of the input shaft and connected to the input shaft via a coupling (33), wherein the power transfer device stores a lubricating fluid for administration to the coupling in a lower part of the housing, further comprising : a vane member (36) for scooping up the lubricating fluid stored in the lower portion of the housing; a guide channel (41, 42, 142) for guiding the lubricating fluid supplied by the vane member to the coupling, and a supply path (42a, 142e) provided at the guide channel for supplying lubricating fluid to the coupling .
    [2]
    The power transmission device according to claim 1, wherein the vane member has a turntable (36) externally mounted on the output shaft.
    [3]
    The power transfer device according to claim 1 or 2, comprising a supply part (36g, 60, 63) for supplying lubricating fluid that flows from the supply path to the coupling.
    [4]
    The power transmission device according to claim 3, wherein the supply part is arranged between the coupling and the guide channel.
    [5]
    The power transmission device according to claim 3 or 4, wherein the supply part has a supply opening (36g) placed at the turntable for supplying lubricating fluid flowing from the supply path to the coupling.
    [6]
    The power transmission device according to claim 5, wherein the feed opening is formed such that an axial center of the feed opening crosses an axial center of the output shaft or is positioned at an oblique position relative to the axial center of the output shaft.
    [7]
    The power transmission device according to claim 3 or 4, wherein the feed part has a threaded cylinder (60) externally mounted on the output shaft with an outer peripheral surface provided with a thread groove (60a).
    [8]
    The power transfer device according to any of claims 1-7, wherein a suction port (70) and an outlet port (71, 72, 73) are formed on the housing.
    [9]
    The power transmission device according to claim 8, wherein a projection (361) for generating an air flow is formed on the turntable.
    [10]
    The power transfer device according to any of claims 1-9, comprising: a defoaming member (40, 143) for defoaming the lubricating fluid.
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    同族专利:
    公开号 | 公开日
    DE102016210230A1|2016-12-15|
    NL2016922B1|2017-09-20|
    JP2017003002A|2017-01-05|
    JP6348457B2|2018-06-27|
    引用文献:
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    DE102006003213A1|2006-01-24|2007-07-26|Zf Friedrichshafen Ag|Lubricating oil supplying device, has hollow shaft, within which ladling device is arranged, which protrudes into oil ring rotating in operation of rotary hollow shaft|
    JPS616336Y2|1980-07-25|1986-02-26|
    JPH0497153U|1991-01-21|1992-08-21|
    JP3936163B2|2001-10-05|2007-06-27|住友重機械工業株式会社|Oil supply structure for orthogonal gear reducer|
    JP2005188729A|2003-12-26|2005-07-14|Tsubaki Emerson Co|Shaft seal part structure for dip-feed lubrication type transmission gear|
    JP5454464B2|2010-12-24|2014-03-26|アイシン・エィ・ダブリュ株式会社|In-wheel motor drive device|
    法律状态:
    2018-01-31| PD| Change of ownership|Owner name: TSUBAKIMOTO CHAIN CO.; JP Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), MERGE; FORMER OWNER NAME: TSUBAKI E&M CO. Effective date: 20171214 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2015117732A|JP6348457B2|2015-06-10|2015-06-10|Transmission|
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