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In-wheel motor system

a technology of in-wheel motors and motor components, applied in the direction of electric propulsion mounting, couplings, transportation and packaging, etc., can solve the problems of high cost of whole system, and achieve the effect of improving work efficiency and easy assembly

Inactive Publication Date: 2007-07-19
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enhances assembly efficiency, reduces system weight and cost, and ensures reliable torque transmission while preventing contamination and leakage.

Problems solved by technology

Further, since the above direct-acting guides 62A and 62B are expensive, the whole system costs dear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0036]FIG. 1 shows the constitution of an in-wheel motor system according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a tire, 2 a wheel consisting of a rim 2a and a wheel disk 2b, and 3 an outer rotor type in-wheel motor which comprises a stator 3S fixed to a non-rotating side case 3a arranged on the inner side in the radial direction and a rotor 3R fixed to a rotating side case 3b rotatably connected to the above non-rotating side case 3a through a bearing 3j and arranged on the outer side in the radial direction.

[0037] Numeral 4 denotes a hub connected to the wheel 2 at its rotary shaft, 5 a knuckle connected to an axle 6, 7 a suspension member composed of a shock absorber, 8 a brake unit composed of a brake disk mounted to the above hub 4, 10 a flexible coupling comprising a plurality of slide members 12A and 12B having roller members 12p which are mounted on the opposed surfaces of a motor-side plate 11A and a wheel-side plate 11C in such a ...

embodiment 2

[0046] In the above Embodiment 1, the flexible coupling 10 in which the slide members 12A and 12B having the roller members 12p whose moving directions are orthogonal to each other are used to interconnect between the motor-side plate 11A and the intermediate plate 11B and between the intermediate plate 11B and the wheel-side plate 11C has been described. When a flexible coupling 20 in which slide members 22A and 22B, each consisting of linear bearings 22p and a rod 22q inserted into these linear bearings 22P and moving linearly, are used in place of the above slide members 12A and 12B to interconnect between a motor-side plate 21A and an intermediate plate 21B and between the intermediate plate 21B and a wheel-side plate 21C as shown in FIGS. 3(a) and 3(b), the same effect can be obtained.

[0047] In the above flexible coupling 20, the linear bearings 22p and 22p are installed in a direction parallel to the direction A on the opposite sides in the circumferential direction of the mo...

embodiment 3

[0049]FIG. 4 shows the constitution of an in-wheel motor system according to Embodiment 3 of the present invention. In FIG. 4, reference numeral 1 denotes a tire, 2 a wheel consisting of a rim 2a and a wheel disk 2b, and 3 an outer rotor type in-wheel motor which comprises a stator 3S fixed to a non-rotating side case 3a arranged on the inner side in the radial direction and a rotor 3R fixed to a rotating side case 3b rotatably connected to the above non-rotating side case 3a through a bearing 3j and arranged on the outer side in the radial direction.

[0050] Numeral 4 denotes a hub connected to the wheel 2 at its rotary shaft, 5 a knuckle connected to an axle 6, 7 a suspension member composed of a shock absorber, 8 a brake unit composed of a brake disk mounted to the above hub 4, 9A the first annular dust boot shown in FIGS. 7, and 9M an elastic dust boot having a wavy section according to the present invention.

[0051]50 denotes a buffer mechanism for elastically supporting the non-...

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PUM

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Abstract

An in-wheel motor 3 and a wheel 2 or a hub 4 are interconnected by a flexible coupling 10 in which a motor-side plate 11A and an intermediate plate 11B are interconnected by a plurality of first slide members 12A, each comprising a roller member 12p moving along a stepped surface 12K formed on the intermediate plate 11B in such a manner that they can move in a predetermined direction (direction A) and the intermediate plate 11B and a wheel-side plate 11C are interconnected by a plurality of second slide members 12B having the same structure as the first slide member 12A in such a manner that they can move in a direction (direction B) orthogonal to the above direction A and which has a small number of parts and is easily assembled. Therefore, even when the motor shaft and the wheel shaft become eccentric to each other, the drive torque of the motor 3 can be transmitted to the wheel 2 without fail and the assembly work efficiency of the in-wheel motor can be enhanced.

Description

BACKGROUND OF THE INVENTION [0001] 1. [Field of the Invention][0002] The present invention relates to an in-wheel motor system for use in a vehicle having direct drive wheels as drive wheels. [0003] 2. [Description of the Prior Art][0004] It is generally known that, in a vehicle having a suspension mechanism such as a spring around a wheel, as the mass of parts under the spring such as a wheel, knuckle and suspension arm, so-called “unsprung mass” increases, changes in the ground holding force of a tire when running on an uneven road become larger, thereby deteriorating road holding properties. [0005] In a vehicle driven by a motor such as an electric car, an in-wheel motor system incorporating a motor in a wheel is being employed. However, in a conventional in-wheel motor whose non-rotating part is fixed to a spindle shaft connected to a part such as an upright or knuckle which is one of the parts around a wheel of the vehicle and whose rotor as a rotating part can rotate together ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60K1/00B60K7/00F16D3/04
CPCB60K7/0007F16D3/04B60K2007/0092B60K2007/0038Y02T10/7072
Inventor SUZUKI, YASUHIROTASHIRO, KATSUMI
Owner BRIDGESTONE CORP