JP4440804B2 - In-wheel motor and wheel mounting mechanism - Google Patents

Description

  The present invention relates to an in-wheel motor and a wheel mounting mechanism, and more particularly, to an in-wheel motor and a wheel mounting mechanism having positioning means at the time of wheel mounting.

  A wheel attached to a vehicle is conventionally known. Further, an in-wheel motor as a drive device has been conventionally known.

A conventional in-wheel motor is described in, for example, JP-A-5-300712 and the like.
JP-A-5-300712

  It is important to improve the assembly of the wheel. In particular, in a wheel for an in-wheel motor, since the gap between the motor housing and the inner peripheral surface of the wheel is small, it is difficult to attach and detach the wheel, and the wheel and the housing are liable to come into contact at the time of detachment.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to facilitate wheel attachment / detachment and to suppress damage to the wheel and the housing and wheel mounting. To provide a mechanism.

  An in-wheel motor according to the present invention is an in-wheel motor that is mounted in a wheel of a vehicle and drives the wheel or is driven by the wheel, and includes a housing, an outer peripheral portion of the housing, and an inner peripheral portion of the wheel. And a guide portion for positioning the wheel and the housing when the wheel is attached or detached.

  The clearance between the housing of the in-wheel motor and the inner peripheral surface of the wheel is relatively small, and it takes time to attach and detach the wheel of the in-wheel motor, and the wheel and the housing tend to come into contact with each other during the attachment and detachment. On the other hand, according to the above configuration, since the wheel and the housing can be positioned when the wheel is attached / detached by the guide portion, the wheel can be easily attached and detached, and damage to the wheel and the housing can be suppressed. it can.

  In the in-wheel motor, it is preferable that the guide portion is rotatable in the rotation direction of the wheel.

  Thereby, the contact resistance between the wheel inner peripheral surface and the guide portion when the vehicle is traveling is reduced.

  The wheel mounting mechanism according to the present invention is provided between a housing, a wheel provided so as to cover the housing from the outside of the vehicle body, and an outer peripheral portion of the housing and an inner peripheral portion of the wheel. A guide portion for positioning the wheel and the housing;

According to the above configuration, since the wheel and the housing can be positioned when the wheel is attached / detached by the guide portion, the wheel can be easily attached / detached and damage to the wheel and the housing can be suppressed .
In the in-wheel motor and the wheel mounting mechanism, the guide portion includes a rotating portion that can rotate about two axes in the front-rear direction and the width direction of the vehicle. Preferably, it is done.

  ADVANTAGE OF THE INVENTION According to this invention, while making wheel attachment or detachment easy, damage to a wheel or a housing can be suppressed.

  Embodiments of an in-wheel motor and a wheel mounting mechanism according to the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  FIG. 1 is a block diagram showing a configuration of an electric wheel including a wheel mounting mechanism according to one embodiment of the present invention. Referring to FIG. 1, an electric wheel 1 includes a wheel disc 100, a wheel hub 200, a joint 300, an in-hole motor 400, a brake rotor 500, a brake caliper 600, a guide portion 700, a tire (see FIG. 1). Not shown).

  In-wheel motor 400 includes a case 410, a motor 420, a planetary gear 430 as a speed reduction mechanism, an oil pump 440, and a shaft 450.

  The wheel disc 100 has a substantially cup shape and includes a disc portion 110 and a rim portion 120. A tire (not shown) is fixed to the outer edge of the rim portion 120 of the wheel disc 100. Wheel disc 100 is formed to receive wheel hub 200, in-wheel motor 400, brake rotor 500, and brake caliper 600. The wheel disc 100 is coupled to the wheel hub 200 by fastening the disc portion 110 to the wheel hub 200 with a hub bolt.

  The wheel hub 200 is connected to the shaft 450 of the in-wheel motor 400 via the joint 300.

  The brake rotor 500 is disposed such that the inner peripheral end is fixed to the outer peripheral end of the wheel hub 200 and the outer peripheral end passes through the brake caliper 600. Brake caliper 600 includes a brake piston and brake pads 610 and 620. The brake pads 610 and 620 sandwich the outer peripheral end of the brake rotor 500.

  When brake oil is supplied to the brake caliper 600, the brake piston moves to the right side of the page and pushes the brake pad 610 to the right side of the page. In response to the brake pad 610 moving to the right side of the drawing, the brake pad 620 moves to the left side of the drawing. As a result, the brake pads 610 and 620 sandwich the outer peripheral end of the brake rotor 500 and the electric wheel 1 is braked.

  Next, the configuration of the in-hole motor 400 will be described.

  The case 410 is disposed on the left side of the wheel hub 200 in the drawing, and houses the motor 420, the planetary gear 430, the oil pump 440, the shaft 450, and the oil passage.

  The motor 420 includes a bearing 421, a rotating shaft 422, a rotor 423, and a stator 424. Stator 424 includes a stator core 424A and a stator coil 424B. Stator core 424A is fixed to case 410. Stator coil 424B is wound around stator core 424A. When motor 420 is a three-phase motor, stator coil 424B includes a U-phase coil, a V-phase coil, and a W-phase coil. The rotor 423 is arranged on the inner peripheral side of the stator core 424A and the stator coil 424B.

  Planetary gear 430 includes a sun gear 431, a pinion gear 432, a ring gear 433, and a planetary carrier 434.

  A sun gear shaft (not shown) is connected to the rotating shaft 422 of the motor 420. The sun gear shaft is rotatably supported. Sun gear 431 is coupled to the sun gear shaft. The pinion gear 432 meshes with the sun gear 431 and is rotatably supported. Ring gear 433 is fixed to case 410. Planetary carrier 434 is connected to pinion gear 432 and is splined to shaft 450. The planetary carrier 434 is rotatably supported.

  The oil pump 440 pumps up the oil accumulated in the oil reservoir and supplies the pumped oil to an oil passage (not shown).

  When an alternating current is supplied to the stator coil 424B by a switching circuit (not shown) mounted on the vehicle body, the rotor 423 rotates and the motor 420 outputs a predetermined torque. Then, the output torque of the motor 420 is transmitted to the planetary gear 430 through the sun gear shaft. The planetary gear 430 changes the output torque received from the sun gear shaft by the sun gear 431 and the pinion gear 432, that is, shifts (decelerates) and outputs it to the planetary carrier 434. The planetary carrier 434 transmits the output torque of the planetary gear 430 to the shaft 450, and the shaft 450 rotates the wheel hub 200 and the wheel disc 100 through the joint 300 at a predetermined rotation speed. Thereby, the electric wheel 1 rotates at a predetermined rotational speed.

  On the other hand, the oil pump 440 pumps up oil from the oil reservoir and supplies the pumped up oil to the oil passage. The oil that has entered the oil passage is supplied to the bearing 421 and the planetary gear 430 along the arrows A, B, and C, for example, and lubricates them. The oil also cools the stator coil 424B.

  The guide part 700 is attached to the case 410 and the brake caliper 600 of the in-wheel motor 400. The guide portion 700 functions as a positioning means for the wheel disc 100 when the wheel disc 100 is assembled.

  In the electric wheel 1, the gap between the outer periphery of the case 410 of the in-wheel motor 400 and the inner periphery of the rim portion 120 of the wheel disc 100 is relatively small. On the other hand, the assembly property of the wheel disc 100 can be improved by providing the guide portion 700. Furthermore, when the wheel disc 100 is assembled, the contact between the wheel disc 100, the case 410 of the in-wheel motor 400, and the brake caliper 600 can be suppressed.

  FIG. 2 is a side sectional view showing the electric wheel 1. FIG. 3 is a front view showing the electric wheel 1. 2 shows a state in which the electric wheel 1 is seen from the direction of the arrow DR2 in FIG. 3, and FIG. 3 shows a state in which the electric wheel 1 is seen from the direction of the arrow DR1 in FIG.

  Referring to FIG. 2, wheel disc 100 is assembled to wheel hub 200 from the direction of arrow DR1. The joint surface between the wheel disc 100 and the wheel hub 200 is provided with an inlay portion 210 (taper portion) that assists in positioning during assembly. The wheel disc 100 is fastened to the wheel hub 200 using hub bolts 220.

  Guide portions 700A, 700B, 700C, and 700D are provided between the case 410 of the in-wheel motor 400 and the rim portion 120 of the wheel disc 100. The guide portions 700A, 700B, 700C, and 700D serve as a positioning mechanism when the wheel disc 100 is assembled.

  Referring to FIG. 3, guide portions 700 </ b> A, 700 </ b> B, 700 </ b> C, and 700 </ b> D are supported by support members attached to case 410 and brake caliper 600. Here, the guide portions 700A and 700D are assembled to the case 410, and the cases 700B and 700C are assembled to the brake caliper 600. The guide portions 700A, 700B, 700C, and 700D are disposed so as to be shifted from each other in the circumferential direction of the wheel disc 100. Further, the guide portions 700A and 700B and the guide portions 700C and 700D are disposed substantially symmetrically with respect to the center line α of the wheel disc 100. The guide portions 700A, 700B, 700C, and 700D are arranged along the inner periphery of the rim portion 120 of the wheel disc 100.

  By providing the guide portions 700A to 700D as described above, the wheel disc 100, the case 410, and the brake caliper 600 are prevented from being damaged when the wheel disc 100 is assembled. Further, the safety at the time of assembling / removing the wheel disc 100 is improved.

  In the example shown in FIGS. 2 and 3, four guide portions are provided, but the number of guide portions can be changed as appropriate.

  4 and 5 are views of the guide unit 700 viewed from the directions of the arrow DR2 and the arrow DR1, respectively. That is, FIG. 4 and FIG. 5 show a state where the guide portion 700 is viewed from the same direction as FIG.

  As shown in FIGS. 4 and 5, the guide part 700 (700 </ b> A, 700 </ b> B, 700 </ b> C, 700 </ b> D) includes a pedestal part 710 and a rotating part 720. The pedestal portion 710 is fixed to the case 410 or the brake caliper 600 of the in-wheel motor 400, and the rotation portion 720 is rotatably supported by the pedestal portion 710. The rotating unit 720 typically has a spherical shape.

  Referring to FIG. 4, when wheel disc 100 is assembled, guide portion 700 positions wheel disc 100 in the radial direction by rotating portion 720 contacting rim portion 120 of wheel disc 100. Can do. Here, the rotating part 720 contacts the rim part 120 while rotating in the direction of the arrow DR3. Therefore, resistance to movement of wheel disc 100 in the direction of arrow DR1 (assembly of wheel disc 100) is reduced. In other words, the rotating unit 720 rotates about the axis in the front-rear direction of the vehicle (the direction perpendicular to the paper surface in FIG. 4), thereby reducing the contact resistance between the wheel disc 100 and the guide unit 700, and The wheel disk 100 can be positioned at the time of attachment. The same applies to the case where the wheel disc 100 is removed from the wheel hub 200.

  Referring to FIG. 5, after assembling wheel disc 100 to wheel hub 200, wheel disc 100 rotates in the direction of arrow DR4 when the vehicle travels. Here, a gap is formed between the rim portion 120 of the wheel disc 100 and the guide portion 700. However, in some cases, such as when the wheel disc 100 is replaced, the inner periphery of the rim portion 120 and the guide portion 700 may be used. The rotating portion 720 may come into contact with the rotating portion 720. At this time, the rotating unit 720 follows the rotation of the wheel disc 100 and rotates in the direction of the arrow DR5. Therefore, the resistance to rotation of the wheel disc 100 in the direction of the arrow DR4 is reduced. That is, the rotation part 720 rotates about the axis in the width direction of the vehicle (the direction perpendicular to the paper surface in FIG. 5), thereby reducing the contact resistance between the wheel disc 100 and the guide part 700 during vehicle travel. It becomes possible.

  As described above, the rotating portion 720 of the guide portion 700 can rotate about two axes in the front-rear direction and the width direction of the vehicle. As a result, it is possible to reduce the contact resistance between the wheel disc 100 and the guide portion 700 when the wheel disc 100 is detached and when the vehicle is traveling.

  The above contents are summarized as follows. That is, the wheel mounting mechanism according to the present embodiment is a wheel mounting mechanism for an in-wheel motor 400 that is mounted in a wheel of a vehicle and that drives or is driven by the wheel. Provided between the case 410 (housing), the wheel disk 100 assembled from the direction of the arrow DR1 so as to cover the case 410 from the outside of the vehicle body, and the outer periphery of the case 410 and the inner periphery of the wheel disk 100; Guide parts 700A to 700D for positioning the wheel disk 100 and the case 410 when the wheel disk 100 is attached and detached are provided. In other words, the in-wheel motor 400 according to the present embodiment is provided between the case 410 and the outer peripheral portion of the case 410 and the inner peripheral portion of the wheel disc 100, and the wheel disc 100 is attached when the wheel disc 100 is detached. And guide portions 700A and 700D for positioning the case 410. Moreover, the guide part 700 (700A-700D) can be rotated in the rotation direction (arrow DR4 direction) of the wheel disc 100, as shown in FIG.

  In the present embodiment, the wheel mounting mechanism for the in-wheel motor has been mainly described. However, the idea of the present invention is not limited to the wheel mounting mechanism for the in-wheel motor, and other wheel mounting mechanisms. It is possible to apply the same idea. In other words, the wheel mounting mechanism according to the present embodiment includes a wheel mounting mechanism in which a guide portion serving as a positioning mechanism when the wheel disk is assembled is provided between the housing that is received by the wheel disk and the inner periphery of the wheel disk. It is. In the example shown in FIG. 1 to FIG. 3, the case 410 and the brake caliper 600 of the in-hole motor 400 correspond to the “casing”, but other “housing” may be a brake drum, for example. In either case, it is possible to improve the ease of assembly of the wheel disc and to suppress damage to the housing and the wheel disc.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is the block diagram which showed the structure of the electric wheel containing the wheel attachment mechanism which concerns on one embodiment of this invention. It is the sectional side view which showed the electric wheel containing the wheel attachment mechanism which concerns on one embodiment of this invention. It is the front view which showed the electric wheel containing the wheel attachment mechanism which concerns on one embodiment of this invention. It is the figure which looked at the guide part in the electric wheel shown by FIGS. 1-3 from the direction of arrow DR2 in FIG. It is the figure which looked at the guide part in the electric wheel shown by FIGS. 1-3 from the direction of arrow DR1 in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Electric wheel, 100 Wheel disc, 110 Disc part, 120 Rim part, 200 Wheel hub, 210 Inlay part, 220 Hub bolt, 300 Joint, 400 In-hole motor, 410 Case, 420 Motor, 421 Bearing, 422 Rotating shaft, 423 Rotor 424 stator, 424A stator core, 424B stator coil, 430 planetary gear, 431 sun gear, 432 pinion gear, 433 ring gear, 434 planetary carrier, 440 oil pump, 450 shaft, 500 brake rotor, 600 brake caliper, 700, 700A, 700B, 700C, 700D guide part, 710 base part, 720 rotating part.

Claims (5)

An in-wheel motor mounted in a wheel of a vehicle and driving or driven by the wheel,
A housing;
An in-wheel motor, comprising: a guide portion that is provided between an outer peripheral portion of the housing and an inner peripheral portion of the wheel, and that positions the wheel and the housing when the wheel is attached and detached.   The in-wheel motor according to claim 1, wherein the guide portion is rotatable in a rotation direction of the wheel. A housing,
A wheel provided to cover the housing from the outside of the vehicle body;
A wheel mounting mechanism, comprising: a guide portion that is provided between an outer peripheral portion of the housing and an inner peripheral portion of the wheel and that positions the wheel and the housing when the wheel is attached and detached. 2. The guide portion includes a rotating portion that can rotate about two axes in the front-rear direction and the width direction of the vehicle, and the positioning is performed by the rotating portion abutting against an inner peripheral portion of the wheel. In-wheel motor as described in. The said guide part contains the rotation part which can be rotated around the two axis | shafts of the front-back direction and the width direction of a vehicle, and the said positioning is performed because the said rotation part contact | abuts the inner peripheral part of the said wheel. The wheel mounting mechanism described in 1.

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