Matching single-shaft double-floating brake for heavy-duty truck

Abstract

The invention relates to a matching single-shaft double-floating brake for a heavy-duty truck. The matching single-shaft double-floating brake comprises lower brake shoes (1), a return spring (2), rolling wheels (3), a cam shaft (4), a adjusting arm (5), upper brake shoes (6) and a brake bottom plate (8), wherein a brake shoe pin shaft (9) is mounted in and sleeved with a brake shoe pin shaft sleeve (T) at the lower end of the brake bottom plate (8); a brake shoe pin shaft liner bushing at the lower ends of the lower brake shoes (1) adopts pin shaft semicircular clamping grooves (Y); the pin shaft semicircular clamping grooves (Y) of the lower brake shoes (1) on the left side and the right side separately are combined to form a complete circular clamping ring for allowing the brake shoe pin shaft (9) to be clamped in; a tension spring (10) is mounted at the lower ends of the lower brake shoes (1) on the two sides; the lower brake shoes (1) on the two sides are tensioned towards the middle; a rolling wheel liner bushing at the upper ends of the lower brake shoes (1) adopts rolling wheel semicircular clamping grooves (C); the rolling wheels (3) are assembled in the rolling wheel semicircular clamping grooves (C) of the lower brake shoes (1) on the left side and the right side separately; and the rolling wheels (3) on the two sides are in press-fit contact with the cam shaft (4) at the middle. The matching single-shaft double-floating brake for the heavy-duty truck has the benefits as follows: the braking is flexible, the returning is quick, the brake performance is good, the braking stagnation phenomenon is prevented, and the traveling safety is effectively improved.

Description

technical field [0001] The invention relates to a truck chassis, in particular to an automobile brake. Background technique [0002] At present, the brake assembly of the existing domestic truck chassis generally adopts a double-layer double-axle sleeve structure, equipped with double-pin shafts, the overall weight is relatively heavy, and the concentricity of the upper and lower two-layer shaft sleeves is high. The working condition of the brake assembly is not good, and it is easy to rust. The brake shoe pin installed on the brake bottom plate of the brake is set in the pin bushing of the lower brake shoe to form a rigid connection between the brake bottom plate and the lower end of the lower brake shoe; the roller and the roller shaft at the upper end of the lower brake shoe The split structure is adopted, the center of the end surface of the roller is provided with a shaft hole, and the roller shaft is set in the shaft hole, and the roller is set in the roller bushing a...

AI Technical Summary

Problems solved by technology

Machining accuracy and matching accuracy cannot meet the standard requirements, which will directly affect the braking performance of the brake

During the operation of the car, sand and sand are likely to enter the gap in the shaft hole of the roller installed on the upper end of the lower brake shoe, resulting in poor rotation of the roller, prone to brake sticking, non-returning after braking, etc., affecting the Truck Driving Safety

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