Brake caliper integrated with brake booster

Abstract

The invention relates to the field of automobile braking, and particularly discloses a brake caliper integrated with a brake booster, the brake caliper comprises a caliper body and a brake cylinder arranged in the caliper body, a caliper piston, a transmission assembly and a rotating part are arranged in the brake cylinder, the transmission assembly comprises a pushing part capable of moving in the braking direction and pushing the caliper piston. A plurality of first cambered surfaces annularly arranged on the surface of the rotating part are arranged on at least one of the front side and the rear side of the rotating part, second cambered surfaces are arranged at the opposite positions of the first cambered surfaces, and balls are arranged between each pair of the first cambered surface and the second cambered surface; the ball is limited by the first cambered surface and the second cambered surface, can relatively slide along the ramp therein and drives the rotating piece to linearly move in the braking direction; the invention overcomes the limitations of the above solution by further reducing the need for hydraulic installation and the number of components, while retaining the possibility of arranging first-stage, second-stage or third-stage redundancy in the control device and without producing significant costs.

Description

technical field [0001] The invention relates to the field of automobile braking, in particular to a brake caliper integrated with a brake booster. Background technique [0002] Due to the increasing demand for higher performance and higher levels of autonomous driving in the whole vehicle, the brake system is required to develop in the direction of strengthening safety redundancy and reducing the cause of failure. At the same time, the market does not allow additional costs. The current passenger car braking system still uses brake fluid as the transfer material to transmit the braking demand to the wheel end calipers. Although the use of brake fluid has many advantages, it also brings a lot of problems to the current network layout of vehicles. It is difficult, and has high installation cost and is prone to wear or even damage to parts for long-term use. In addition, in the prior art, a fixed caliper tends to be selected to achieve better performance, but when using a fix...

AI Technical Summary

Problems solved by technology

At the same time, the market does not allow additional costs

The current passenger car braking system still uses brake fluid as the transfer material to transmit the braking demand to the wheel end calipers. Although the use of brake fluid has many advantages, it also brings a lot of problems to the current network layout of vehicles. Difficult, and has high installation cost and prone to parts wear or even damage for long-term use

In addition, in the prior art, fixed calipers tend to be selected to achieve better performance, but when using fixed calipers, the driving force should be transmitted to the outside of the calipers, and the installation space is very limited

[0003] The solution described in WO2021019380 solves the problem of electromechanical actuation of the fixed caliper, but it is not sufficient for the braking of service brakes

In addition, duplication of motors and transmissions results in considerable additional cost, and the resulting redundancy is difficult to fully utilize; EP1818235 attempts to reduce the complexity of the braking system by assigning an independent pressure building module to each caliper, thereby Reduce hydraulic network

However, since the pressure building module is separate from the caliper, it still needs to be installed, and if the brake fluid filling needs to be repeated for each wheel, the installation will be more complicated; The introduction of purely electromechanical actuators, while the front wheels are braked by independent electrohydraulic actuators, further simplifies the layout of the hydraulic network, with redundancy consisting of independent front and rear controllers and a hydraulic pedal that can provide pressure to the front wheels in the event of a power failure provided by the pedal feel simulator, although the front wheel brake device can be placed closer to the wheel, hydraulic installation is still required, and the additional solenoid valve will increase the cost of the pedal feel simulator; the invention in CN109249916 passes the brake Integrated booster, vehicle stability control module and hydraulic connections between them eliminate installation complexity

However, since the number of control actuators does not change, the probability of failure is high, and due to the integration, the basic redundancy is lost; in the event of a power failure, there is no electronic control device in the entire braking system to operate; CN106246764 A solution for high-efficiency braking of the caliper piston is presented in , making it possible to perform purely mechanical braking in a non-self-locking manner, however, this solution limits electromechanical braking for the parking brake function, while Service brakes still use the hydraulic pressure of the brake fluid to generate clamping force

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