Improved brake bottom plate of drum brake

Abstract

The invention discloses an improved brake bottom plate of a drum brake, which comprises a brake bottom plate, wherein a connecting disk is arranged on the brake bottom plate; a plurality of installing holes are arranged on the connecting disk; the brake bottom plate is convexly provided with a clamping part; connecting through holes are formed on the clamping part; the end parts of a left brake shoe and a right brake shoe are inserted into the clamping part of the brake bottom plate and are connected with the clamping part; the clamping part of the brake bottom plate is provided with the connecting through holes positioned at the upper layer and the lower layer, and a notch is formed at the middle part; the connecting through holes are cut for certain gaps; and the gaps and the connecting through holes form an integrated guide groove. The improved brake bottom plate of the invention has a uniform friction surface, prolongs the service life of friction plates, the brake and the brake bottom plate, has more reliable brake and higher brake efficiency, and improves the driving safety and the driving and riding comfort.

Description

technical field [0001] The invention relates to a drum brake, in particular to the improvement of the brake bottom plate of the drum brake. Background technique [0002] The traditional drum brake is mainly composed of brake base plate, brake drum, brake shoe, wheel cylinder or camshaft, return spring, positioning pin and other components. The brake base plate is installed on the fixed position of the axle such as: the front and rear axle housings, which are fixed, and are equipped with brake shoes, wheel cylinders, back-moving springs and positioning pins to withstand the rotational torque during braking. Each brake drum has a pair of brake shoes, and the brake shoes are riveted with friction discs. The brake drum is installed on the hub wheel rotation shaft (the output half shaft of the bridge), and is a part that rotates with the wheel. It is made of a certain amount of cast iron and is shaped like a drum. When braking, the wheel cylinder piston or the camshaft rotates ...

AI Technical Summary

Problems solved by technology

[0003] In the drum brake with the above structure, the left and right brake shoes are arranged symmetrically on the brake base plate. It is the center of the circle and stretches outward. Therefore, the extended front end of the brake shoe will first contact the brake drum and rub against the brake drum. The rear end is only a small part of the friction, and the friction is different, but the friction plate needs to be replaced; this will cause a lot of waste to the user, so it can be seen that the friction surface of the traditional drum brake is uneven; moreover, The brake shoe end of this drum brake is limited to swing. When the user suddenly brakes suddenly, the brake shoe end will forcefully press the brake drum, which will cause "chattering" and "locking", and the braking is unreliable. Make driving unsafe and ride uncomfortable

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