Brake device of hub motor
A technology of in-wheel motor and braking device, which is applied to electromechanical devices, power devices, motors, etc., can solve the problems of restricting wide application, deterioration of vehicle low-speed driving smoothness, and difficulty in heat management of in-wheel motors, so as to reduce conduction and enhance heat dissipation. Effect
Pending Publication Date: 2021-10-12
HITACHI LTD
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Problems solved by technology
[0003] Although hub motors have many advantages, some disadvantages restrict their wide application in the field of electric vehicles
For example, the increase of the unsprung mass leads to the deterioration of the ride comfort of the vehicle at low speed, and the heat management problem of the hub motor with the drive system integrated in the relatively closed rim, etc.
The ride comfort of the vehicle at low speed can be improved by adjusting the suspension, but it is difficult to solve the heat management problem of the in-wheel motor, especially in low-speed urban driving conditions, frequent braking causes both the motor and the braking device to become heat sources
Method used
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Embodiment Construction
[0040] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0041] figure 1 is a schematic cross-sectional view of an in-wheel motor system according to an embodiment of the present invention. figure 2 yes figure 1 An exploded view of the hub motor system shown. figure 1 , figure 2 The hub motor system shown integrates the hub motor, brake and inverter. Hereinafter, the in-wheel motor is sometimes referred to simply as the motor.
[0042] figure 1 , figure 2 The motor shown is an outer rotor motor, which mainly includes an outer rotor 6 and an inner stator 8 , wherein the permanent magnet 7 of the outer rotor 6 is embedded in the inner side of the outer rotor 6 . The motor is arranged coaxially on the inner side of the wheel hub in the vehicle width direction, and the outer rotor 6 is connected to the wheel hub directly or through the motor casing to drive the wheel to rotate. figure 1 , fi...
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The present invention relates to a brake device of a hub motor, the hub motor being coaxially disposed on the inner side of a wheel hub in the vehicle width direction, the brake device comprising: a brake disc (1) attached to a rotor of the in-wheel motor so as to rotate synchronously with the rotor; a brake caliper (4) which is fixed to a chassis component used for being connected with the hub and used for braking the brake disc, and a plurality of heat dissipation fins (2) are arranged on the surface of the brake disc in the circumferential direction. According to the brake device of the hub motor, heat dissipation of the brake disc can be enhanced through the heat dissipation fins, and conduction of brake heat to the motor rotor is reduced.
Description
technical field [0001] The invention relates to the technical field of electric vehicle chassis braking, in particular to a braking device for an in-wheel motor. Background technique [0002] Hub motor technology is an electric vehicle drive technology that integrates components such as motors or motors and inverters into the rim of the vehicle. Its advantage is that the driving system originally located above the suspension spring is transferred to the rim below the suspension spring, which not only realizes the independent control of the driving wheel, but also uses the space originally carrying the driving system for the ride and battery configuration. Space, which increases the degree of freedom for vehicle space design. In addition, because the vehicle driven by the in-wheel motor does not need mechanical components such as drive axle and differential, it can reduce the quality of the whole vehicle and reduce the transmission loss at the same time. [0003] Although i...
Claims
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IPC IPC(8): B60T5/00B60T1/06B60K7/00F16D65/847F16D65/12H02K7/102H02K9/00H02K11/21
CPCB60T5/00B60T1/065B60K7/0007F16D65/847F16D65/128H02K7/102H02K9/00H02K11/21B60K2007/0092B60K2007/0038Y02T10/64
Inventor 孟祥赞孟毅德山健
Owner HITACHI LTD