Electric power-assisted brake system capable of reducing eccentric wear of main cylinder
A technology of electric power assist and braking system, which is applied to brakes, vehicle parts, brake transmission devices, etc., can solve the problems of increased wear of the master cylinder block, impact on driving safety, leakage outside the master cylinder, etc., to reduce the eccentric wear of the master cylinder. , Improve the effect of impact noise problem
Active Publication Date: 2021-04-30
上海拿森汽车电子有限公司
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Problems solved by technology
However, in the electric power brake system with rack and pinion assist structure, when the gear drives the rack to assist, the force generated by the rotation of the rack driven by the gear will inevitably form a certain angle with the axis of the master cylinder. The existence of the angle will cause the brake piston to generate a large radial component force in the master cylinder during the braking process, which in turn will cause the master cylinder piston to wear more on the master cylinder body. When the wear reaches a certain level, the master cylinder may be caused Faults such as leakage outside the cylinder have a great impact on driving safety
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[0019] In order to further illustrate the technical means and functions adopted by the present invention to achieve the intended purpose of the invention, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0020] see figure 1 , the electric power-assisted braking system for reducing the eccentric wear of the master cylinder of the present invention is integrated with the brake master cylinder of the vehicle, which includes a brake master cylinder, a piston 1, an electric control system, a gear 2, a rack 3, a push rod 4, a push rod Rod seat 41, spring seat 51, return spring 5, positioning ring 7 and main housing 6, the electric control system is used to control the rotation of gear 2, gear 2, rack 3, push rod 4, push rod seat 41, spring seat 51. The return spring 5 and the positioning ring 7 are both set in the main housing 6, the gear 2 meshes with the rack 3, the push rod seat 41 is sleeved on the...
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An electric power-assisted brake system capable of reducing eccentric wear of a main cylinder comprises the brake main cylinder, a piston, a gear, a rack, a push rod and an electric control system, the piston can be driven by the electric control system to push the brake main cylinder to brake a vehicle, and the push rod further comprises a first spherical surface, a second spherical surface and a push rod seat. The first spherical surface and the second spherical surface are coaxially arranged in the axial direction of the push rod, the first spherical surface is arranged at one end of the push rod, the second spherical surface is arranged in the middle of the push rod in a protruding mode in the radial direction of the push rod, the arc surface of the first spherical surface faces the piston, the arc surface of the second spherical surface faces the push rod seat, the push rod abuts against the piston and the push rod seat in a spherical fit mode through the first spherical surface and the second spherical surface. The rack can be driven by the electric control system to push the push rod and further push the piston and the brake main cylinder, so that the vehicle is braked.
Description
technical field [0001] The invention relates to the technical field of automobile braking systems, in particular to an electric power-assisted braking system for reducing eccentric wear of a master cylinder. Background technique [0002] The electric power brake system is a common brake power system, which mainly pushes the brake piston to brake the brake master cylinder through electronic control. However, in the electric power brake system with rack and pinion assist structure, when the gear drives the rack to assist, the force generated by the rotation of the rack driven by the gear will inevitably form a certain angle with the axis of the master cylinder. The existence of the angle will cause the brake piston to generate a large radial component force in the master cylinder during the braking process, which in turn will cause the master cylinder piston to wear more on the master cylinder body. When the wear reaches a certain level, the master cylinder may be caused Faul...
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IPC IPC(8): B60T13/74
CPCB60T13/746
Inventor 范鹏陶喆于鑫朱心放魏曦张彦朝
Owner 上海拿森汽车电子有限公司