Dual-redundancy mechanism capable of buffering return stroke impact force of electronic brake booster

Abstract

The invention discloses a dual-redundancy mechanism capable of buffering the return stroke impact force of an electronic brake booster. The dual-redundancy mechanism comprises a shell, the shell is fixedly connected with an automobile, a lifting lug is arranged on the right side of the shell and movably connected with a brake pedal through a hinge pin, a ball rod is movably connected to the left side of the lifting lug through threads, a shaft sleeve rod is riveted to the left end of the ball rod, the ball rod is sleeved with a lead screw, the lead screw is in clearance fit with the ball rod,a conical spring is fixedly connected between the lead screw and the ball rod, a guide rail is in interference fit with the lead screw, and a guide screw is installed on the shell. The dual-redundancymechanism is reasonable in structure and convenient to assemble, the guide screw can buffer a guide rail by additionally arranging a limiting mechanism on the guide screw, so that the impact betweenthe guide rail and a nut is reduced, the guide rail and the lead screw can be effectively prevented from being disconnected, the braking safety is improved, the noise generated during working is reduced, and the use efficiency and the working efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a double redundant mechanism capable of buffering the return impact force of an electronic brake booster. Background technique [0002] With the development of electric vehicles and smart vehicles, new requirements are put forward for the braking system, such as the ability to independently generate the required braking force (active braking), to realize the function of braking energy recovery, and to be able to match the active safety system of the chassis. Functions such as anti-lock braking system (ABS), anti-skid control (ASR), vehicle stability control (ESC) and adaptive cruise control (ACC), etc. [0003] A traditional braking system uses a vacuum booster to boost the driver's brakes, wherein the engine can draw vacuum for the vacuum booster. However, electric vehicles use electric motors as the drive system, which makes it impossible for vacuum boosters to achi...

AI Technical Summary

Problems solved by technology

[0005] The push rod of the electric brake booster will be greatly impacted when it returns, and the connection between the screw and the guide rail will easily break, which will cause the vehicle to lose the power boost function and seriously affect driving safety. The conical spring in the Bosch product can be used as a buffer mechanism, but its There are other functional properties, so the excessive stiffness cannot be adjusted, the buffer capacity is weak, and the screw and guide rail still have the risk of breaking under some extreme working conditions

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