High-efficiency cam brake device

Abstract

The invention discloses a high-efficiency cam brake device belonging to the technical field of vehicle brake devices. A cam is arranged on an axle, more than three protrusions are uniformly distributed on the circumferential direction of the outer surface of the cam body, a shaft sleeve is arranged outside the cam, the inner surface of the shaft sleeve is fixedly provided with a friction body with a circumferential concave-convex surface, the outer diameter of the cam is smaller than the inner diameter of the friction body, the outer surface of the shaft sleeve is fixedly provided with a guide bar in a radial direction, the outer end of the guide bar is fixedly provided with a spring guide bar sleeved with a spring, and the spring extends out of the spring guide bar and tightly supports against one end of a brake transmission mechanism in the range of the spring guide bar length. The invention has the beneficial effect that an eccentric friction brake mode is adopted: the eccentric friction body is sleeved on the cam shaft, the protrusions on the cam shaft are elastically combined with the concave-convex part on the friction body so as to realize braking, and the eccentric braking has a good braking effect like that of point braking and cannot lead to braking locking, so that better vehicle running safety is achieved; and the high-efficiency cam brake device is suitable for braking systems of various vehicles and other actuating units.

Description

Technical field [0001] The invention belongs to the technical field of power brake devices, and particularly refers to a high-efficiency cam brake device. Background technique [0002] At present, the domestic and foreign automobile market is developing rapidly, and a large number of vehicles of various specifications are gradually entering the homes of ordinary people. However, their braking devices are only the following types: one type uses circular mechanical brakes or hydraulic brakes, which have poor braking effect. Braking on a slippery road, or during emergency braking, the wheels are likely to be completely locked because the braking force exceeds the friction between the tires and the ground; the second type is the anti-lock braking system, and the anti-lock braking system is the car Another major development after the safety measures relay seat belts is to use a rubber air bag in the valve body to give brake fluid pressure when the brake is stepped on, and fill it into...

AI Technical Summary

Problems solved by technology

Vehicles equipped with ABS can reach 80%-90%, 30%-10%, and 15%-20% respectively on dry asphalt roads, rainy days, snowy days and other road surfaces. The braking distance is mostly about 40m-50m, or even farther. The second is that its production cost is relatively high, and it cannot be popularized on general-purpose vehicles such as agricultural vehicles.

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