Novel double-pull-wire drum brake with rotating arm mechanism

Abstract

The invention discloses a novel double-pull-wire drum brake with a rotating arm mechanism. A rotating arm mechanism assembly on a brake bottom plate is connected with a pull wire guide mechanism; thepull wire guide mechanism comprises a pull wire guide wheel and a guide wheel shaft; one end of a pull wire I runs through a pull wire support and then is clamped in a clamping groove of a U-shaped bent part of a brake pull arm, and the other end of the pull wire I runs through the pull wire guide wheel and then is clamped in a groove port; a pull wire spring sleeves the pull wire I and is arranged in a pull wire support groove; one end of a pull wire II runs through the pull wire guide wheel and then is clamped in the groove port, and the other end is connected with a rotating arm; the rotating arm is divided into a linear section and a forked section; a rotating arm support is installed on the back face of the brake bottom plate; the forked section of the rotating arm runs through a rotating arm cover and the rotating arm support; and the linear section is connected with a hand brake pull wire. The brake is suitable for different parking strokes and parking forces of the whole vehicle, and is good in applicability and convenient to adjust; in the movement process, only the rotation effect of the pull wire guide wheel and the rotating arm pin and the compression and return movement of the pull wire spring exist, so that part abrasion is smaller, movement is smoother, abnormal sound is smaller, and transmission efficiency is higher.

Description

technical field [0001] The invention relates to a parking brake with a hand brake, or a drum brake integrated with a parking brake and a service brake, especially a drum brake with high parking noise requirements. Background technique [0002] The parking brake of the drum brake assembly is widely used in various types of vehicles. Conventional vehicles are generally powered by gasoline or diesel, and the vehicle is noisy and poor in comfort. With the application of electronic power in vehicles, customers are demanding The requirements for vehicle comfort are getting higher and higher. While improving the noise during service braking, it is also necessary to minimize the scratching noise of the cable and other components during parking. [0003] The cable connection part inside the conventional drum brake is the cable core wire and the cable spring. The guide in the brake is the cable guide plate or the cable bracket. Or the joint of the square head is installed on the side...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the drum brake parking cable needs to be bent and circled from the drum brake end to the fixed end of the chassis to reduce the efficiency, and solve the problem that the drum brake cable guide structure in the prior art is not in smooth contact with the cable spring Or sticking will cause scratching noise, and even wear and damage the guide, which will lead to the problem of longer cable travel or brake failure.

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