Electric wheel based friction-electromagnetic combined braking structure

Abstract

The invention belongs to the field of electric wheel brakes, and specifically discloses an electric wheel based friction-electromagnetic combined braking structure. According to the technical scheme, the electric wheel based friction-electromagnetic combined braking structure integrates a hub motor driving system, a frictional brake system, an electromagnetic braking system and a cooling system. The electric wheel based friction-electromagnetic combined braking structure is simple in structure and compact in arrangement, can directly achieve direct driving, frictional braking, electromagnetic braking and friction-electromagnetic combined braking function of a hub motor, and can effectively cool the motor by various manners.

Description

technical field [0001] The invention belongs to the field of electric wheel brakes, in particular to a friction-electromagnetic composite braking structure based on electric wheels. Background technique [0002] With the continuous improvement of the performance of vehicle drive motors, in-wheel motor drive technology has attracted more and more attention from experts and scholars at home and abroad. The electric vehicle directly driven by the hub motor not only replaces the traditional powertrain, reduces the power mechanical transmission mechanism, simplifies the chassis structure, but also improves the power transmission efficiency. [0003] At present, electric vehicles driven by hub motors have appeared. There are many studies on the drive system of hub motors at home and abroad, but for the braking system of hub motors, due to the consideration of the size limit of the hub, most of them stay Only disc brakes are installed, but most of the disc brakes use hydraulic oil...

AI Technical Summary

Problems solved by technology

When the car is running at high speed or braking in an emergency, the brake block is directly pressed against the brake disc through the piston. Long-term braking will cause excessive wear of the brake block and brake disc and overheating of both, resulting in thermal decay of the brake. Thus affecting the braking performance of the vehicle or even causing brake failure

[0004] The Chinese patent application number is 02152033.X and the name is "Electric Vehicle Wheel Motor", which discloses a wheel motor for electric vehicles, through the outer rotor of the cylindrical outer rotor DC motor with high power and high torque and the bolts for the wheel It is fixedly connected to drive the wheels. When the car needs to be braked, the friction brake of the friction disc is used to stop the vehicle. This can be said to be the simplest electric wheel structure; but the patent application has the following shortcomings: (1) This patent application adopts an air-cooled motor, which is suitable for motors with low power, but the motor power required by electric vehicles is relatively large, and air-cooling generally cannot meet the cooling requirements, and a special water-cooling device is required to cool the motor; ( 2) Only friction brakes are installed instead of electromagnetic brakes, and only rely on friction brakes to slow down and stop the car. Long-term braking will cause excessive wear of brake pads and brake discs and overheating of both, resulting in thermal decay of the brakes , affecting the braking performance of the vehicle or even causing braking failure

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