JP2016064762A - In-wheel motor mounted vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inverter motor mounted vehicle capable of preventing an erroneous wiring between an in-wheel motor unit and an inverter device, and also enabling easy handling of an inverter unit.SOLUTION: Suspension arms 61, 62 provided in a vehicle body include an attachment plate 63 for an in-wheel motor unit 1. The attachment plate 63 includes a male-type, suspension-arm-side connector part 73, which has a power cable 8 connected thereto. A motor case of the in-wheel motor unit 1 facing the attachment plate 63 includes a motor-side connector part 71 which fits into the suspension-arm-side connector part 73.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vehicle equipped with an in-wheel motor, and more particularly to a wiring structure for supplying electric power to an in-wheel motor.

  In a vehicle using an in-wheel motor, it is necessary to provide a power cable in order to supply power from the inverter device to the in-wheel motor. In a vehicle used for an in-wheel motor, in addition to a conventional brake hose that supplies hydraulic pressure to a disc brake, three U-phase, V-phase, and W-phase power cables are arranged on a path connecting the vehicle body and the wheels. .

  As shown in FIG. 11, the drive wheel provided with the in-wheel motor unit is accommodated in the wheel house 112 a of the vehicle body 112 and supported by the vehicle body 112 via a suspension device (suspension) 115. A wheel wheel 133 is fixed to the in-wheel motor unit 111 with bolts 136 and a tire 134 is attached.

  Then, three power cables 117 of U phase, V phase, and W phase are arranged in a path connecting the vehicle body 112 and the wheel 133 of the wheel, and are connected to a terminal box (not shown) of the in-wheel motor unit 111. .

  The above-described power cable 117 is required to have durability such as rotation of the driving wheel according to the rotation of the handle and following up / down movement of the wheel 133 according to the road surface change, and also needs to protect against flying objects.

  Patent Document 1 discloses a wiring device that supplies an in-wheel motor with an electrical signal from the vehicle body side, with the object of improving the durability of signal lines such as power cables. This wiring device is a wiring device that supplies an electric signal from a vehicle body to an in-wheel motor at least a part of which is disposed in the wheel, and includes a connector provided on the in-wheel motor, a connector, and a vehicle-side device. And a wiring holding part that rotatably supports the suspension arm on the vehicle body side and supports the wiring.

Japanese Patent No. 4628136

  By the way, the electric power cable 117 connected to the in-wheel motor unit 111 is thick to flow a large current and has poor flexibility. Therefore, it is inconvenient to carry the power cable 117 with a short length of about 1 to 2 m attached to the in-wheel motor unit 111 or the inverter device side, or attach it to the vehicle body.

  Further, in Patent Document 1 described above, power cables as wiring are fixed by inserting each cable into a connector portion of a terminal box of an in-wheel motor. For this reason, also in the thing of this patent document 1, the problem that workability | operativity is bad when carrying in the state which attached the power cable to the in-wheel motor or the vehicle main body side, or attaching to a vehicle body is solved. It has not been.

  Also, in the case of three-phase wiring, if the wiring is in a state where the in-wheel motor unit and the inverter device can be seen, it is unlikely that the connection of the wiring is wrong, but the wiring of the in-wheel motor unit and the inverter device directly on the vehicle body wall etc. When the wiring of this cannot be confirmed, there is a problem that erroneous wiring is likely to occur.

  Therefore, the present invention is intended to provide an inverter motor-equipped vehicle that can prevent erroneous wiring between the in-wheel motor unit and the inverter device and can easily handle the inverter unit.

  In order to solve the above problems, in the present invention, a male or female suspension in which a mounting plate of an in-wheel motor unit is provided on a suspension arm provided in a vehicle body, and a power cable is connected to the mounting plate. An arm-side connector portion is provided, and a motor-side connector portion fitted to the suspension arm-side connector portion is provided on the outer surface of the in-wheel motor unit facing the mounting plate.

  Further, a hole may be provided in each of the connector of the suspension arm side connector portion and the connector of the motor side connector portion, and both connectors may be bolted through these holes.

  The in-wheel motor unit may be provided with a terminal box, and a female motor side connector portion may be accommodated in the terminal box.

  The power cable may be supported on the mounting plate.

  The suspension arm may be hollow, a power cable may be disposed therein, and the power cable may be slidably disposed within the suspension arm.

  A signal line may be arranged on the mounting plate, and one connector for fitting the socket may be provided on the mounting plate, and the other connector for fitting the socket may be provided on the outer surface of the in-hole motor unit.

  In the vehicle equipped with the in-wheel motor unit according to the present invention, the suspension arm side connector portion and the motor side connector portion are connected by attaching the in-wheel motor unit to the mounting plate.

  Since the electrical connection can be made by fitting the male and female connector portions to which predetermined wiring has been applied in advance, erroneous wiring can also be prevented.

  In addition, since the power cable is not attached to the in-wheel motor unit, it can be easily handled as a part.

It is a schematic plan view of an electric vehicle having an in-wheel motor unit. It is the figure which looked at the electric vehicle of FIG. 1 from back. It is a vertical front view of the in-wheel motor unit used for this invention. It is a schematic diagram which shows the state which attached the suspension connection member to the in-wheel motor unit used for this invention. It is a side view which shows the in-wheel motor unit used for this invention. It is a schematic diagram which shows the state which attaches a suspension connection member to the in-wheel motor unit used for this invention. It is a side view which shows the state which attached the attachment plate to the in-wheel motor unit used for this invention. It is a schematic diagram which shows the state which attaches a suspension connection member to the in-wheel motor unit used for this invention. It is the schematic which shows the connector part of the in-wheel motor unit used for this invention. It is a top view which shows the state which attached the attachment plate to the in-wheel motor unit used for this invention. It is a schematic diagram which shows the state which mounted the in-wheel motor unit in the wheel house.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, an electric vehicle 81 equipped with an in-wheel motor unit according to an embodiment of the present invention includes a vehicle body 82, front wheels 83 as steering wheels, drive wheels (rear wheels) 84, left and right The in-wheel motor unit 1 which transmits a driving force to each of the driving wheels 84 is provided. As shown in FIG. 2, the drive wheel 84 is housed inside a wheel housing 82 a of the vehicle body 82 and is fixed to the lower portion of the vehicle body 82 via the suspension coupling portion (suspension device) 6. As a mounting form of the in-wheel motor unit 1, in addition to the rear wheel driving system shown in FIGS. 1 and 2, either the front wheel driving system or the four wheel driving system may be used.

  The suspension connecting portion 6 supports the driving wheel 84 by a suspension arm extending to the left and right, and suppresses vibration of the vehicle body 82 by absorbing vibration received from the ground by the driving wheel 84 by a strut including a coil spring and a shock absorber. To do. Furthermore, a stabilizer that suppresses the inclination of the vehicle body when turning or the like is provided at a connecting portion of the left and right suspension arms. The suspension connecting portion 6 is an independent suspension type in which the left and right wheels can be moved up and down independently in order to improve the followability to the road surface unevenness and efficiently transmit the driving force of the driving wheels to the road surface. Is desirable.

  In this electric vehicle 81, it is necessary to provide a motor, a drive shaft, a differential gear mechanism, and the like on the vehicle body 82 by providing the in-wheel motor unit 1 that drives the left and right drive wheels 84 inside the wheel housing 82a. This eliminates the need to secure a wide cabin space and control the rotation of the left and right drive wheels.

  An in-wheel motor unit 1 shown in FIG. 3 is rotated by an electric motor 11, a planetary gear type speed reducer 12 driven by the output of the electric motor 11, and an output shaft 14 coaxial with the input shaft 13 of the speed reducer 12. The motor unit 16 that houses the hub unit 15 and the electric motor 11 and the speed reducer 12 is a main component.

  The motor case 16 includes a cylindrical case main body 17 having an open end surface and a case lid 20 provided on one end surface of the case main body 17. The front end of the case main body 17 (the end on the outboard side, The left end in FIG. 3 has a radial front end 18. An open hole 19 is provided in the center portion of the front end portion 18.

  In the present invention, “outboard” means outside the vehicle, and “inboard” means inside the vehicle.

  In the illustrated case, the electric motor 11 is a radial gap type brushless DC motor, and is in a space surrounded by the case main body 17 of the motor case 16, the front end 18, the inner cylindrical portion 18 a, and the case lid 20 of the motor case 16. Incorporated.

  The electric motor 11 includes a stator 21 fixed to an inner diameter surface of a cylindrical case body 17, a rotor 22 disposed with a radial gap on the inner diameter surface of the stator 21, and a rotor hub 23 that supports the rotor 22. Composed. The boss portion 24 of the rotor hub 23 is fitted to the input shaft 13 and fixed by the key 25.

  The stator 21 is fixed to the inner surface of the cylindrical case body 17 by shrink fitting.

  The speed reducer 12 includes the input shaft 13, the output shaft 14, a sun gear 27 integrally provided on the outer diameter surface of the input shaft 13, and an inner cylindrical portion of the front end portion 18 of the motor case 16 on the outer periphery of the sun gear 27. A ring gear 28 fitted and fixed to the inner surface of 18a, pinion gears 29 provided at three positions at equal intervals in the circumferential direction between the ring gear 28 and the sun gear 27, a pinion pin 31 supporting the pinion gear 29, and a pinion It is comprised by the carrier 32 which supports the outboard side edge part of the pin 31, and the inboard side edge part. The pinion gear 29 is supported by the pinion pin 31 via the needle roller bearing 33.

  The carrier 32 has an outboard carrier flange 32a connected to the outboard side end of the pinion pin 31, and an inboard side carrier flange 32b connected to the inboard side end. A bridge portion 34 extending in the axial direction is provided between the pinion gears 29 on the inboard side carrier flange 32b, and the outboard side carrier flange 32a is integrated with the bridge portion 34 by welding. In addition, a thrust plate 35 is interposed between the opposed inner surfaces of the carrier flanges 32a and 32b and the pinion gear 29 to facilitate the rotation of the pinion gear 29.

  An outboard side rolling bearing 42 and an inboard side rolling bearing 43 are interposed between the outboard side carrier flange 32a and the inboard side carrier flange 32b and the input shaft 13, respectively. Relative rotation is possible.

  The output shaft 14 has a shaft portion 36 that is integral with the outboard carrier flange 32a and has a smaller diameter. A portion of the shaft portion 36 that is close to the carrier flange 32a is a boss portion 37 of the carrier flange 32a. A boss portion 38 protruding toward the inboard side is also provided on the inner diameter portion of the inboard side carrier flange 32b.

  A spline shaft 39 having a diameter smaller than that of the shaft portion 36 is provided at an end portion on the outboard side of the shaft portion 36. A step portion 41 is formed at a boundary portion between the shaft portion 36 and the boss portion 37.

  The hub unit 15 includes an inner member 45 splined to the spline shaft 39 of the output shaft 14 and an outer member 47 provided coaxially on the outer diameter side via a double row hub bearing 46. The The inner member 45 is fixed by a nut 48 screwed to the tip of the spline shaft 39. A wheel is attached to the hub 49 of the inner member 45.

  The hub unit 15 is positioned on the inboard side at the step portion 41 of the output shaft 14. The flange 53 of the outer member 47 is fixed around the open hole 19 provided in the front end portion 18 of the motor case 16 by a bolt 54.

  An oil seal 50 is mounted between the inner diameter surface of the end portion on the inboard side of the outer member 47 and the boss portion 37 of the output shaft 14, and the speed reducer 12 side and the hub unit 15 side are oil sealed. Thus, when the hub unit 15 is replaced during maintenance, the nut 48 can be removed and only the hub unit 15 can be replaced without worrying about oil leakage from the inside of the in-wheel unit 1.

  A space 55 is provided at the center of the case lid 20 of the motor case 16, and the rear end (inboard side end) of the input shaft 13 has a margin in the radial direction and axial direction inside the space 55. Inserted. A sensor rotor 58 of a rotation sensor 56 (resolver in the case of illustration) is attached to the input shaft 13 inserted into the space portion 55, and a sensor stator 57 is provided on the inner diameter surface of the space portion 55 so as to face this.

  The rotation sensor 56 detects the rotation angle of the input shaft 13 that rotates integrally with the motor rotor 22. The detection information is input to a control device (not shown) and used for rotation control of the electric motor 11 as rotation angle information of the motor rotor 22.

  The in-wheel motor unit 1 is configured as described above, and in use, the in-wheel motor unit 1 is attached as a so-called in-wheel type by fixing the hub 49 to the center portion inside the wheel, and the motor case 16 will be described later. As described above, the vehicle body main body 82 is connected via the suspension connection portion 6.

  As shown in FIG. 4, a wheel 84 a of a wheel (drive wheel 84) is attached to the hub unit 15. In addition, a brake disc 84b is attached to the hub unit 15.

  The suspension connecting portion 6 includes an attachment plate 63 to which a lower suspension arm 61 and an upper suspension arm 62 are attached. In the present invention, the lower suspension arm 61 and the upper suspension arm 62 are attached to the in-wheel motor unit 1 via the attachment plate 63 without directly fixing the in-wheel motor unit 1 to the suspension arms 61 and 62.

  As shown in FIGS. 4 to 7, the suspension plate 61 is attached to the in-wheel motor unit 1 by attaching a mounting plate 63 to which the suspension arms 61 and 62 are attached to the case lid 20 of the motor case 16 with bolts 64. 62 will be attached. The mounting plate 63 is formed in a size that covers the case lid 20, and is provided with a protruding portion 63 a that covers at least an opening of a terminal box 70 described later. In the present invention, the power cable 8 is arranged on the vehicle body main body 82 side, and the three power cables 8 for three-phase wiring taken out from the vehicle body 82 are attached to the mounting plate 63 as shown in FIG. The holding plate 65 is fixed by attaching with screws 66.

  A terminal box 70 for supplying electric power to the electric motor 11 is provided on the outer periphery of the motor case 16 that is the outer surface of the in-hole motor unit 1. In this embodiment, a terminal box 70 is provided on the case lid 20.

  As shown in FIGS. 5 and 6, a motor side connector portion 71 is provided in the terminal box 70. In this embodiment, the motor-side connector portion 71 is provided with three female connectors 71a for three-phase wiring.

  A suspension arm side connector portion 73 that fits with the motor side connector portion 71 is provided at a position facing the motor side connector portion 71 of the mounting plate 63. In this embodiment, the suspension arm side connector portion 73 is provided with three male connectors 73a, and the power cables 8 corresponding to the respective connectors 73a are connected to the female connector 71a of the motor side connector portion 71. Yes. The motor-side connector portion 71 and the suspension arm-side connector portion 73 constitute the connector 7.

  As shown in FIG. 6, when the in-wheel motor unit 1 is aligned with the mounting plate 63, the in-wheel motor unit 1 is moved in the direction of the arrow in the figure, and the in-wheel motor unit 1 is fixed to the mounting plate 63 with bolts 64. The male connector 73a of the suspension arm side connector portion 73 is fitted to the female connector 71a of the motor side connector portion 71 and mechanically and electrically connected. Then, electric power is supplied from the power cable 8 to the in-wheel motor unit 1.

  Thus, in this embodiment, there is no wire such as a cable between the in-wheel motor unit 1 and the mounting plate 63, and the in-wheel motor unit is fitted by fitting the male and female connectors 71a and 73a. 1 is connected to the power cable 8. Since the electrical connection can be made by fitting the male and female connectors 71a and 73a to which predetermined wiring has been applied in advance, erroneous wiring can be prevented. Further, since the power cable 8 is not transported to the in-wheel motor unit 1 and is not attached to the vehicle body, the workability is good and the in-wheel motor unit 1 is easy to handle. .

  In the above-described embodiment, the motor connector portion 71 on the in-wheel motor unit 1 side is a female type, and the suspension arm side connector portion 73 is a male type. However, the motor connector portion 71 is a male type and the suspension arm type connector portion. 73 may be a female type. However, if the male connector portion that is a convex portion is used as a product, there is a possibility that the connector portion may be deformed by being bumped at the time of conveyance. It is preferable to use the part.

  As shown in FIG. 5, the motor-side connector 71 is provided in a box-shaped terminal box 70, and an O-ring 75 for waterproofing is provided around the opening 70a. On the other hand, a suspension arm side connector portion 73 is provided at a position facing the terminal box 70 of the mounting plate 63. As shown in FIG. 7, the mounting plate 63 is provided with a protrusion 63 a that closes the opening 70 a of the terminal box 70, and when the mounting plate 63 is attached to the case lid 20 of the motor case 16 with the bolt 64, 75 improves the airtightness and improves the waterproofness in the terminal box 70.

  Next, another embodiment of the present invention will be described with reference to FIGS. In this embodiment, the power cable 8 is disposed inside at least one of the suspension arms 61 and 62. For example, in FIG. 8, the lower suspension arm 61 is a hollow member, and the power cable 8 is slidably disposed in the lower suspension arm 61. As a result, the durability of the power cable 8 with respect to the rotation of the drive wheel according to the rotation of the handle, the tracking of the wheel 84a to the vertical movement of the wheel according to the road surface change, and the like is improved.

  In this way, in the suspension arms 61 and 62 attached to the attachment plate 63, the lower suspension arm 61 is hollow, and the power cable 8 for supplying power to the in-wheel motor unit 1 is disposed inside. Then, by exposing the wiring of the power cable 8 from the lower suspension arm 61 to the in-wheel motor unit 1 to the mounting plate 63 to the minimum necessary, protection from flying objects can be realized. Furthermore, a cable line cover for protection may be provided.

  In the above-described embodiment, the lower suspension arm 61 is hollow and the power cable 8 for supplying power to the in-wheel motor unit 1 is disposed inside. However, the upper suspension arm 62 is hollow and disposed inside. An electric power cable 8 for supplying power to the wheel motor unit 1 may be disposed.

  The male connector 73a and the female connector 71a are provided with screw holes 73b and 71b (see FIG. 6), respectively, so that when the male connector 73a and the female connector 71 are fitted, the screw holes 73b and 71b of both are matched. After the two connectors 71 and 73 are fitted to each other, the connectors 71 and 73 are fixed with bolts 76 in order to ensure the connectivity, so that the connectors 71 and 73 are not detached. The mechanical strength of the joint can be increased. At this time, the terminal box 70 has an opening on one side surface so that the bolt 76 can be fixed. And after both the connectors 71 and 73 are fitted, both the connectors 71 and 73 are bolted so that the connectors are not detached. And after fixing with the volt | bolt 76, the opening part of a side part is covered and sealed. By comprising in this way, a fitting part can be confirmed from an outer side, and also sufficient joining strength is obtained by bolt fastening.

  Further, as shown in FIG. 10, the signal line 8 a for the sensor for detecting the position and temperature of the rotor is also arranged in the vehicle body 82 in the same manner as the power cable 8, and this signal line 8 a is attached to the mounting plate 63. Support. The attachment plate 63 is provided with one connector for fitting the socket. The motor case 16 of the in-wheel motor unit 1 is provided with the other connector for fitting the socket. And what is necessary is just to comprise so that it may connect, if the in-wheel motor unit 1 is fixed to the predetermined position of the attachment plate 63. FIG. In addition, since there are about 10 signal lines on one side, erroneous wiring can be prevented by connecting with a pin connector or the like and fitting the socket.

  The electric vehicle equipped with the electric vehicle drive device according to the present invention may have the rear wheels as drive wheels, the front wheels as drive wheels, or a four-wheel drive vehicle. In the present specification, “electric vehicle” is a concept including all vehicles that obtain driving force from electric power, and should be understood as including, for example, a hybrid vehicle.

  Moreover, in each said embodiment, although the example of the in-wheel motor unit 1 which employ | adopted the planetary gear reduction mechanism for the reduction part 12 was shown, it is not restricted to this, Arbitrary reduction mechanisms can be employ | adopted. For example, a cycloid reduction mechanism, a parallel shaft gear reduction mechanism, etc. correspond. Further, a so-called direct motor type that does not employ the speed reducer 12 may be used.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

1: In-wheel motor unit 2: Car body 6: Suspension connecting part 7: Connector 8: Power cable 8a: Signal line 9: Power cable 11: Electric motor 12: Reducer 13: Input shaft 14: Output shaft 15: Hub unit 16 : Motor case 17: Case body 18: Front end 18a: Inboard side flange 19: Open hole 20: Case lid 21: Stator 22: Motor rotor 61: Lower suspension arm 62: Upper suspension arm 63: Mounting plate 63a: Protrusion 64 : Bolt 65: Pressing plate 66: Screw 70: Terminal box 70a: Opening 71: Motor connector 71a: Female connector 71b: Screw hole 73: Suspension arm side connector 73a: Male connector 73b: Screw hole

Claims (7)

  An in-wheel motor unit mounting plate is provided on a suspension arm provided on the vehicle body, and a male or female suspension arm side connector portion to which a power cable is connected is provided on the mounting plate and faces the mounting plate. A vehicle equipped with an in-wheel motor, wherein a motor-side connector portion that fits into a suspension arm-side connector portion is provided on an outer surface of the in-wheel motor unit.   2. The in-wheel motor-equipped vehicle according to claim 1, wherein a hole is provided in each of the connector of the suspension arm side connector portion and the connector of the motor side connector portion, and both connectors are bolted through the holes. .   The in-wheel motor-equipped vehicle according to claim 1 or 2, wherein a terminal box is provided in the in-wheel motor unit, and a female motor-side connector portion is accommodated in the terminal box.   The in-wheel motor-equipped vehicle according to any one of claims 1 to 3, wherein the power cable is supported on the mounting plate.   The in-wheel motor-equipped vehicle according to any one of claims 1 to 4, wherein the suspension arm is hollow and a power cable is disposed therein.   The in-wheel motor-equipped vehicle according to claim 5, wherein the power cable is slidably disposed in the suspension arm.   A signal line is disposed on the mounting plate, and one connector for fitting the socket is provided on the mounting plate, and the other connector for fitting the socket is provided on the outer surface of the in-hole motor unit. The vehicle equipped with the in-wheel motor according to any one of claims 1 to 4.

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