JP6420580B2 - Vehicle motor drive device - Google Patents

Description

  The present invention relates to a vehicle motor drive device for driving wheels, and more particularly to a structure for supporting and fixing an electric cable to a casing of the vehicle motor drive device.

  2. Description of the Related Art Conventionally, an in-wheel motor drive device that is disposed in an air space region of a road wheel or an on-board motor drive device that is mounted on a vehicle body and drives a wheel via a drive shaft is known. In a vehicle motor drive device such as an in-wheel motor drive device or an on-board motor drive device, various electric cables such as a signal cable and a power cable are attached.

  For example, in the in-wheel motor drive device described in JP2011-240769A (Patent Document 1), a sensor is attached to the outer ring of the wheel bearing, and a signal cable extending from the sensor is routed along the casing of the speed reducer. To do. A locking portion as a clamp member is fixed to the casing of the speed reducer, and the signal cable is supported by the casing of the speed reducer by clamping an intermediate portion of the signal cable to the locking portion. As a result, the signal cable is stably fixed so as not to swing.

JP2011-240769A

  However, the present inventor has found that there is a further improvement in the conventional signal cable support structure. That is, vibration occurs when the motor rotation shaft of the vehicle motor drive device or the rotation element of the speed reducer rotates at high speed. If it does so, even if the middle part of a signal cable is being fixed with the latching | locking part, the other location of the signal cable which is not fixed to a latching part may vibrate, and there exists a possibility that abrasion may arise between casings. When the signal cable is continuously scratched with the casing for a long period of time, the signal cable is scratched and the durability of the signal cable is lowered.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to prevent electric cables from being scratched when a signal cable or other electric cable is fixed to a casing of a vehicle motor drive device.

To this end, a vehicle motor drive device according to the present invention includes a casing that houses a rotor and a stator of a motor, an electric cable that is routed along the wall surface of the casing, and a rubber member that is in contact with the outer peripheral surface of the electric cable. And a pressing tool for pressing and fixing the electric cable so as to extend in an arc shape around the motor axis by pressing the rubber member.

  According to the present invention, when the rubber member is pressed, the rubber member is deformed to the compression side and the electric cable is pressed and fixed, so that the electric cable is securely fixed to the casing. In particular, since the rubber member has an effect of absorbing and attenuating vibration, the electric cable is not displaced by vibration. Therefore, the electric cable is not rubbed with the casing, and the durability of the electric cable is improved as compared with the prior art. The rubber member is desirably provided along the longitudinal direction of the electric cable. Alternatively, it is desirable that a plurality of rubber members be provided at intervals in the longitudinal direction of the electric cable. It is desirable that the pressing tool is also provided along the longitudinal direction of the electric cable. Alternatively, it is desirable that a plurality of pressing tools be provided at intervals in the longitudinal direction of the electric cable.

  As one embodiment of the present invention, a groove is formed in the wall surface of the casing, and the electric cable and the rubber member are accommodated in the groove. According to such an embodiment, the electric cable is positioned in the groove and is more securely fixed to the casing. As another embodiment, the electric cable may be placed on a flat wall surface of the casing.

  The shape of the rubber member is not particularly limited. As a preferred embodiment of the present invention, the rubber member is formed in a cylindrical shape, and the electric cable passes through the central hole of the rubber member. According to this embodiment, a rubber member can be reliably interposed between a casing wall surface and an electric cable, and between an electric cable and a pressing tool. As another embodiment, a sheet-like rubber may be wound around an electric cable.

  Although the present invention can be applied to the outer wall surface of the casing exposed to the outside, as a preferred embodiment, the electric cable is routed along the inner wall surface of the casing, and the presser is fixed to the inner wall surface of the casing. . According to such an embodiment, the electric cable can be securely fixed to the casing inside the casing that cannot be visually recognized from the outside, and the electric cable can be prevented from being scratched between the inner wall surface of the casing due to vibration. In this case, the electric cable may be connected to a sensor provided inside the casing. According to such an embodiment, since an electric cable is used as a signal cable and a signal transmitted from a sensor is transmitted by an electric cable that is securely fixed so as not to bend, there is an actual advantage that noise is not mixed in the signal. . As another embodiment, an electric cable may be connected to a power source such as a motor, and the electric cable may be used as a power cable.

  As an embodiment of the present invention, a casing has a cylindrical main body, a reduction chamber that houses a reduction gear in the cylindrical main body, a motor chamber that houses a rotor and a stator, and an internal space of the cylindrical main body is provided. The electric cable is routed along the wall surface of the partition wall, including a partition wall that is divided into a deceleration chamber and a motor chamber. Alternatively, as another embodiment of the present invention, the casing includes a cylindrical main body and a cover that closes an end of the cylindrical main body, and the electric cable is routed along the inner wall surface of the cover.

  The present invention can be applied to an in-wheel motor driving device arranged in an air space region of a road wheel of a wheel or an on-board motor driving device mounted on a vehicle body and driving a wheel via a drive shaft. As one embodiment of the present invention, it further includes a wheel hub driven by a motor and a wheel hub bearing that rotatably supports the wheel hub on a casing, and is disposed in an inner space region of the wheel. According to this embodiment, the vehicle motor drive device of the present invention can be used as an in-wheel motor drive device.

  As described above, according to the present invention, vibration of the electric cable can be suppressed and the electric cable can be prevented from being scratched between the wall surface of the casing. Further, the power cable can be suitably supported and fixed to the inner wall surface of the casing that cannot be visually recognized from the outside. In particular, it is possible to protect a thin signal cable as compared with a power cable. In addition, there is an actual advantage that the electric cable can be protected in the in-wheel motor driving device having a larger vibration than the on-board motor driving device.

1 is a longitudinal sectional view showing a vehicle motor drive device according to an embodiment of the present invention. It is explanatory drawing which shows typically the state which looked at the partition of the embodiment from the motor part side. FIG. 3 is a longitudinal sectional view taken along the line III-III in FIG. 2 and showing a state viewed from the direction of an arrow. It is explanatory drawing which shows typically the state which removed the pressing tool from FIG. It is a longitudinal cross-sectional view which shows the modification of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a vehicle motor drive device according to an embodiment of the present invention. FIG. 2 is an explanatory view schematically showing a state in which the partition wall of the embodiment is viewed from the motor unit side, and shows a state viewed in the direction of an arrow, taken along a line II-II in FIG. FIG. 3 is a longitudinal sectional view taken along the line III-III in FIG. 2 and showing a state viewed from the direction of the arrow. FIG. 4 is an explanatory view schematically showing a state where the pressing tool is removed from FIG. The in-wheel motor drive device 11 of this embodiment is a vehicle motor drive device installed in the inner space of the wheel of an electric vehicle. This electric vehicle is a passenger car and can travel on public roads like a general engine car.

  The in-wheel motor drive device 11 has a substantially cylindrical shape, and as shown in FIG. 1, a motor unit 11 </ b> A, a reduction unit 11 </ b> B, and a wheel sequentially arranged in series and coaxially in the direction of the axis O of the in-wheel motor drive device 11. A hub bearing portion 11C is provided. The speed reduction part 11B adjacent to the wheel hub bearing part 11C has a larger diameter than the wheel hub bearing part 11C. The motor part 11A adjacent to the speed reducing part 11B has a larger diameter than the speed reducing part 11B.

  The casing 21a that forms the outline of the motor unit 11A is a substantially cylindrical shape when viewed from the axial direction of the in-wheel motor drive device 11, and is a non-rotating fixed member centered on the axis O of the in-wheel motor drive device 11. The same applies to the casing 21b that forms the outline of the speed reducing portion 11B. On the other hand, the wheel hub bearing portion 11C has a rotating member (hub wheel 77) on the inner ring side and a fixing member (outer ring member 80) on the outer ring side, and a wheel (not shown) is attached to the rotating member (hub wheel 77). It is fixed and transmits the rotational driving force of the motor unit 11A to the wheels and the vehicle weight to the wheels. At this time, the wheel hub bearing portion 11C and the speed reduction portion 11B are located in the inner space region of the wheel, but the motor portion 11A protrudes from the inner space region of the wheel inward in the vehicle width direction (inboard side). A terminal box 22 is formed on the casing 21a of the motor unit 11A so as to protrude to the outer diameter side (see FIG. 2).

  As shown in FIG. 1, the motor unit 11A accommodates a rotor 12, a stator 13, and a motor shaft 14a of a rotating electrical machine in a motor chamber L in a casing 21a. The motor unit 11A outputs rotation to the wheel hub bearing unit 11C through the speed reduction unit 11B by power running operation, or performs power regeneration using the rotation of the wheel hub bearing unit 11C during braking or the like. The axial end of the substantially cylindrical casing 21a is closed by a disk-shaped motor rear cover 21r. The stator 13 is attached and fixed to the inner peripheral surface of the casing 21a at a predetermined interval in the circumferential direction. The rotor 12 is disposed on the inner diameter side of the stator 13, and the rotor 12 is attached and fixed to a motor shaft 14 a extending along the axis O. The coil 17 of the stator 13 is electrically connected to the three power lines 101 (FIG. 2). 11 A of motor parts receive the electromagnetic force produced by supplying an alternating current to the coil 17 of the stator 13, and the rotor 12 comprised with a permanent magnet or a magnetic body rotates. One end of the motor shaft 14 a is supported by the motor rear cover 21 r via the rolling bearing 16. The other end of the motor shaft 14a is supported by the partition wall 21e via the rolling bearing 16. The cylindrical casings 21a and 21b, the disk-shaped partition wall 21e, and the disk-shaped motor rear cover 21r are coupled to each other to form the casing of the in-wheel motor drive device 11.

  The substantially cylindrical casing 21b defines a deceleration chamber N, and the deceleration chamber of the deceleration portion 11B is accommodated in the deceleration chamber N. The speed reduction mechanism is a cycloid speed reduction mechanism, and includes an input shaft 14b, two pairs of eccentric members 71, two rolling bearings 72, two curved plates 73 having a wave-like outer peripheral portion, and a plurality of inner members. A pin 74, a plurality of outer pins 75, and an output shaft 76 are provided. The input shaft 14b of the deceleration unit 11B is connected and fixed to the motor shaft 14a of the motor unit 11A. Since the input shaft 14b and the motor shaft 14a extend along the axis O and rotate together, they are also referred to as motor-side rotating members.

  The eccentric members 71 are respectively provided on the input shaft 14b so as to be eccentric from the axis O with phases different from each other by 180 °. The two curved plates 73 have a disc shape whose outer peripheral portion is formed in a corrugated shape, and has a central hole at the center thereof, and the inner peripheral surface of the central hole is connected to each eccentric member via a rolling bearing 72. 71 is rotatably supported on the outer peripheral surface of 71. Each outer pin 75 is fixed to an outer pin housing 79 elastically supported by the casing 21b, engages with the outer peripheral portion formed in the waveform of the curved plate 73, and the curved plate 73 revolving around the axis O at a high speed. Slightly rotate in the direction opposite to the revolution direction. Each inner pin 74 is fixedly attached to the output shaft 76, passed through a plurality of through holes 73 h formed in the curved plate 73 at predetermined intervals in the circumferential direction, and only the rotational motion of the curved plate 73 is taken out and transmitted to the output shaft 76. To do. As a result, the rotation of the input shaft 14b is decelerated by the decelerating portion 11B and output from the output shaft 76. The reduction unit 11B, which is a cycloid reduction mechanism, has a higher reduction ratio than the reduction mechanism formed of a planetary gear set or a parallel shaft gear set, and contributes to a reduction in size and weight of the in-wheel motor drive device 11.

  A hub wheel 77 of the wheel hub bearing portion 11C is connected and fixed to the output shaft 76. The hub wheel 77 is rotatably supported by the outer ring member 80 via the rolling elements 78 of the wheel hub bearing portion 11C. The outer ring member 80 is fixed to the casing 21b with bolts. A road wheel (not shown) is attached and fixed to the hub wheel 77 via a bolt 81. The rolling elements 78 are a plurality of balls arranged in two rows. The wheel hub bearing portion 11C is, for example, a double row angular ball bearing.

  The in-wheel motor drive device 11 includes a lubricating oil circuit of an axial oil supply system, and lubricates the motor unit 11A and the speed reduction unit 11B. Specifically, a lubricating oil tank 53 is attached to the lower part of the casing 21b. A lubricating oil pump 51 is provided in a partition wall 21e of the casing that serves as a boundary between the motor chamber L that houses the motor unit 11A and the deceleration chamber N that houses the deceleration unit 11B. The lubricating oil pump 51 is arranged coaxially with the axis O and is driven by an inner pin reinforcing member 74 b fixed to the inner pin 74. That is, the lubricating oil pump 51 is driven by the output rotation of the speed reducing unit 11B. A suction oil passage 52 formed in the wall of the partition wall 21e extends in the vertical direction, and an upper end thereof is connected to the suction port of the lubricant pump 51, and a lower end thereof is provided in the lower portion of the speed reduction unit 11B. 53.

  The discharge oil passage 54 formed inside the wall thickness of the partition wall 21e extends in the vertical direction from the discharge port of the lubricating oil pump 51 to the outer edge of the partition wall 21e. The casing oil passage 55 formed inside the wall thickness of the casing 21a extends in parallel with the axis O, and the end on the partition wall 21e side is connected to the upper end of the discharge oil passage 54 described above. The end of the casing oil passage 55 on the side close to the motor rear cover 21r is connected to a communication oil passage 56 formed inside the wall thickness of the motor rear cover 21r. The connecting oil passage 56 extends vertically and radially between the inner wall surface and the outer wall surface of the motor rear cover 21r, which is a disk-shaped wall. The upper end of the communication oil passage 56 located on the outer diameter side of the motor rear cover 21r is connected to one end of the casing oil passage 55 described above. The lower end of the communication oil passage 56 located on the inner diameter side of the motor rear cover 21r is connected to a motor shaft oil passage 58a provided on the motor shaft 14a.

  The motor shaft oil passage 58a is provided inside the motor shaft 14a and extends along the axis O. Then, one end of the motor shaft oil passage 58a closer to the speed reduction portion 11B is connected to a speed reduction portion input shaft oil passage 58b provided on the input shaft 14b and extending along the axis O. Further, one end of the motor shaft oil passage 58a on the side far from the speed reduction portion 11B is connected to the communication oil passage 56 described above. Further, the motor shaft oil passage 58a is connected to the inner diameter side end of the rotor oil passage 64 formed in the rotor flange portion at the axial center portion.

  The speed reducer input shaft oil passage 58b is provided inside the input shaft 14b and extends along the axis O between both ends of the input shaft 14b. A lubricating oil hole 60 is provided at one end of the speed reducer input shaft oil passage 58 b facing the output shaft 76. The lubricating oil hole 60 injects lubricating oil toward the deceleration chamber N.

  The speed reducer input shaft oil passage 58 b branches into a lubricating oil passage 59 extending radially outward in each eccentric member 71. The outer diameter side end of the lubricating oil passage 59 is connected to a rolling bearing 72 provided between the outer peripheral surface of the eccentric member 71 and the inner peripheral surface of the curved plate 73.

  A deceleration part return hole 61 is provided at the bottom of the deceleration chamber N. The speed reduction part return hole 61 passes through the casing 21 b and connects the speed reduction chamber N and the lubricating oil tank 53. A motor part return hole 66 is provided at the bottom of the motor chamber L. The motor portion return hole 66 (virtual line) penetrates the partition wall 21 e and communicates the motor chamber L and the lubricating oil tank 53.

  The operation of the lubricating oil circuit will be described. The lubricating oil pump 51 driven by the output shaft 76 via the inner pin reinforcing member 74b sucks the lubricating oil stored in the lubricating oil tank 53 via the suction oil passage 52, and Lubricating oil is discharged into the discharge oil passage 54. The lubricating oil is pressurized by the lubricating oil pump 51 and sequentially flows through the discharge oil passage 54, the casing oil passage 55, the communication oil passage 56, and the motor shaft oil passage 58a. Part of the lubricating oil flowing through the motor shaft oil passage 58 a flows into the rotor oil passage 64 and is injected from the outer peripheral surface of the rotor 12 into the motor chamber L. Next, the lubricating oil goes to the bottom of the motor chamber L and returns to the lubricating oil tank 53 through the motor part return hole 66. In this way, the motor portion 11A is lubricated by the axial center oil supply system. Further, the motor chamber L is filled with the injected lubricating oil to make an oil atmosphere. Thereby, cooling and lubrication in the motor chamber L are performed. In particular, the rotor 12 and the stator 13 are cooled, and the rolling bearings 16 and 16 are cooled and lubricated.

  Lubricating oil flowing from the motor shaft oil path 58a to the speed reducing part input shaft oil path 58b branches, flows through the lubricating oil path 59 and the lubricating oil hole 60, and is injected into the speed reducing chamber N, and the eccentric member 71 of the speed reducing part 11B is rolled. It adheres to the bearing 72, the curved plate 73, the inner pin 74, and the outer pin 75. Next, the lubricating oil goes to the bottom of the deceleration chamber N and returns to the lubricating oil tank 53 through the deceleration unit return hole 61. In this way, the speed reducing portion 11B is lubricated by the axial center oil supply system. Further, the deceleration chamber N is filled with the injected lubricating oil to make an oil atmosphere. Thus, cooling and lubrication in the deceleration chamber N is performed. Specifically, cooling and lubrication of the eccentric member 71, the rolling bearing 72, the curved plate 73, the inner pin 74, the outer pin 75, the rolling bearing that supports these, and the contact portion of the speed reducing portion 11B are performed.

  A terminal box 22 is formed on the outer periphery of the casing 21a of the motor unit 11A as shown in FIG. The terminal box 22 is provided for drawing three power lines 101 and one signal line 102 into the in-wheel motor drive device 11. The terminal box 22 is disposed near the upper side of the in-wheel motor drive device 11 (specifically, the motor unit 11A) and protrudes toward the front of the vehicle.

  As shown in FIG. 2, connectors 23 and 24 communicating with the outside of the in-wheel motor drive device 11 are provided on the protruding end side of the terminal box 22, and the connectors 23 and 24 of the terminal box 22 are provided on the base side of the terminal box 22. A partition wall 41 that partitions the motor chamber L is provided. The connector 23 connects each power line 101 to the motor electric cable 43 inside the in-wheel motor drive device 11. The connector 24 connects the signal line 102 to the sensor electric cable 44 inside the in-wheel motor drive device 11. A motor electrical cable 43 connected to each power line 101 and extending from the connector 23 through the partition wall 41 to the motor chamber L is connected to the coil 17 (FIG. 1). The sensor electric cable 44 connected to the signal line 102 and extending from the connector 24 through the partition wall 41 to the motor chamber L is a partition wall that becomes a part of the casing in the motor chamber L as shown in FIGS. It is routed along the wall surface of 21e.

  A groove 47 is formed on the wall surface of the partition wall 21e as shown in FIG. The groove 47 extends in an arc shape around the axis O. The groove 47 accommodates the sensor electric cable 44. A rubber member 46 is in contact with the outer peripheral surface of the sensor electric cable. A plurality of rubber members 46 are arranged at intervals, and are accommodated in the grooves 47. The rubber member 46 is tubular, and the sensor electric cable 44 is passed through the center hole thereof. As shown in FIG. 3, the sensor electric cable 44 has an 8-shaped cross section, and includes two core wires and a skin portion that insulates the core wires. The cross section of the groove 47 is semicircular.

  As shown in FIG. 2, the groove 47 is covered with a presser 48. The presser 48 is elongated along the groove 47, and is attached and fixed to the partition wall 21e by a connector. Here, the connecting tool is, for example, a bolt 49, and a plurality of bolts 49 are provided at intervals in the longitudinal direction of the pressing tool 48. As shown in FIG. 3, the presser 48 is a belt-like plate material, and has a bolt through hole 48 h on one side in the short side direction of the presser 48. A female screw hole that is screwed into the bolt 49 is formed on one side of the groove 47 on the surface of the partition wall 21e facing the motor chamber L. The retainer 48 is fixed to one side of the groove 47 by the bolt 49. The presser 48 covers one side surface of the groove 47 but opens the other side surface of the groove 47. Thus, the presser 48 presses the rubber member 46 toward the groove bottom by covering the groove 47, and presses and fixes the sensor electric cable 44. As shown in FIG. 3, the rubber member 46 is pressed against the groove bottom of the groove 47 by the presser 48, and its cross section is elastically deformed into an elliptical shape.

  As shown in FIG. 4, the groove 47 basically extends in the circumferential direction along the outline of the rolling bearing 16, but one end portion of the groove 47 may change its direction and further extend in the outer diameter direction toward the connector 24. . Further, the other end of the groove 47 may be changed in direction and further extend toward the bottom of the casing 21a. The sensor electric cable 44 passes through the motor part return hole 66 (FIG. 1) and is connected to a thermistor (temperature sensor) 50 disposed in the lubricating oil tank 53. The thermistor 50 measures the temperature of the lubricating oil flowing down the speed reducer return hole 61 and transmits a sensor signal. The sensor signal is transmitted from the thermistor 50 to the outside of the in-wheel motor drive device 11 through the sensor electric cable 44, the connector 24, and the signal line 102.

  By the way, according to this embodiment, the partition wall 21e is a part of the casing of the in-wheel motor drive device 11, and the sensor electric cable 44 is fixed to the partition wall 21e. Specifically, the presser 48 presses the rubber member 46 to press and fix the sensor electric cable 44. As a result, the sensor electric cable 44 is securely fixed to the partition wall 21e and is not displaced by vibration. In addition, since the rubber member 46 is interposed between the sensor electric cable 44 and the partition wall 21e, vibration applied to the sensor electric cable 44 from the partition wall 21e can be reduced.

  According to the present embodiment, the groove 47 is formed in the wall surface of the partition wall 21e facing the motor chamber L, and the sensor electric cable 44 and the rubber member 46 are accommodated in the groove 47. It is more securely fixed to 21e.

  Further, the rubber member 46 of the present embodiment is formed in a cylindrical shape, and the sensor electric cable 44 penetrates the center hole of the rubber member 46, so that the entire circumference of the sensor electric cable 44 can be surrounded by the rubber member 46. Therefore, the sensor electric cable 44 can be suitably pressed and fixed to the partition wall 21e.

  Further, the partition wall 21e of the present embodiment is provided in the cylindrical casing 21a and divides the internal space of the cylindrical casings 21a and 21b extending continuously into the deceleration chamber N and the motor chamber L. The wall surface 21e corresponds to the inner wall surface of the casing. The sensor electric cable 44 is routed along the wall surface of the partition wall 21e, and the presser 48 is fixed to the wall surface of the partition wall 21e. As a result, the sensor electric cable 44 is securely fixed in the motor chamber L.

  Next, a modification of the present invention will be described. FIG. 5 is a longitudinal sectional view showing a modification of the present invention. About the modification, the same code | symbol is attached | subjected about the structure which is common in embodiment mentioned above, description is abbreviate | omitted, and a different structure is demonstrated below. In the modification, the sensor electric cable 44 is routed along the inner wall surface of the motor rear cover 21r. Specifically, a groove 47 is formed on the inner wall surface of the motor rear cover 21r facing the motor chamber L, and the groove 47 extending in an arc shape on the outer diameter side of the rolling bearing 16 is the same as the configuration shown in FIGS. A sensor electric cable 44 is routed along the line. The sensor electric cable 44 of the modified example is connected to the connector 24 at one end, and connected to a sensor (not shown) such as a rotation speed sensor arranged to face the outer peripheral surface of the motor shaft 14a at the other end. This rotational speed sensor is preferably attached and fixed to the inner wall surface of the motor rear cover 21r via a bracket, for example.

  According to the above-described modification, the in-wheel motor drive device 11 includes the casing 21a corresponding to the cylindrical main body and the motor rear cover 21r that closes the end of the cylindrical main body. The sensor electric cable 44 is routed along the inner wall surface of the motor rear cover 21r. As a result, the sensor electric cable 44 is securely fixed in the motor chamber L.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention. In the in-wheel motor drive device 11 of the present embodiment, the wheel hub bearing portion 11C has a hub wheel 77, a rolling element 78, and an outer ring member 80, and the hub wheel 77 is rotatably supported on the casing 21b. Although not shown, the in-wheel motor drive device 11 may be mounted on the body of the electric vehicle without providing the hub wheel 77. In this case, the motor driving device is not arranged in the inner space of the wheel, but becomes an on-board motor driving device. Although not shown, the motor electric cable 43 may be fixed to the inner wall surface of the casing with a rubber member and a pressing member. Moreover, although the reduction gear illustrated the cycloid reduction gear, the planetary gear reduction gear, the parallel biaxial gear reduction gear may be sufficient, and the direct motor type which does not have a reduction gear may be sufficient.

  The vehicle motor drive device according to the present invention is advantageously used in electric vehicles and hybrid vehicles.

11 In-wheel motor drive device, 11A motor part,
11B Reduction part, 11C Wheel hub bearing part, 12 Rotor,
13 Stator, 14a Motor shaft, 14b Input shaft,
21a, 21b casing, 21e partition, 21r motor rear cover,
22 terminal box, 23, 24 connector, 41 partition wall,
43 motor electric cable, 44 sensor electric cable, 46 rubber member,
47 groove, 48 presser, 49 bolt, 50 thermistor,
76 output shaft, 77 hub wheel, 80 outer ring member, 101 power line,
102 signal line, L motor room, N speed reduction room, O axis line.

Claims (8)

A casing for housing the rotor and stator of the motor;
An electrical cable routed along the wall of the casing;
A rubber member in contact with the outer peripheral surface of the electric cable;
A vehicular motor drive device comprising: a pressing member that presses and fixes the electric cable so as to extend in an arc shape around the motor axis by pressing the rubber member. A groove is formed in the wall surface of the casing,
The electric cable and the rubber member are accommodated in the groove;
The motor drive apparatus for vehicles of Claim 1.   The vehicle motor drive device according to claim 1, wherein the rubber member is formed in a cylindrical shape, and the electric cable passes through a central hole of the rubber member. The electrical cable is routed along the inner wall surface of the casing,
The vehicular motor drive device according to claim 1, wherein the pressing member is fixed to an inner wall surface of the casing.   The vehicle electric motor drive device according to claim 4, wherein the electric cable is connected to a sensor provided in the casing. The casing includes a cylindrical main body, a speed reduction chamber for storing a reduction gear in the cylindrical main body, and a motor chamber for storing a rotor and a stator, and an internal space of the cylindrical main body is divided into a reduction speed chamber and a motor chamber. Including partition walls to
The vehicle motor drive device according to claim 4, wherein the electric cable is routed along a wall surface of the partition wall. The casing includes a cylindrical main body and a cover that closes an end of the cylindrical main body,
The vehicle motor drive device according to claim 4, wherein the electric cable is routed along an inner wall surface of the cover. A wheel hub driven by the motor;
A wheel hub bearing that rotatably supports the wheel hub on the casing;
The vehicle motor drive device according to claim 1, wherein the vehicle motor drive device is disposed in an inner space region of the wheel.

Images