A dry parking brake

Abstract

The invention relates to a dry type parking brake comprising a half shaft, a combination sleeve, a spline shaft sleeve, a shell, a shell end cover, a plurality of inner friction plates, a plurality ofouter friction plates, an extrusion part, an outer end cover and an elastic part. A shaft shoulder radially extends out of the middle of the half shaft. The combination sleeve is fixedly arranged atthe end of the half shaft. The spline shaft sleeve is arranged on the half shaft in a sleeving mode through spline connection and sleeved with the shell. The shaft shoulder of the half shaft is sleeved with the shell end cover. The shell end cover is provided with an air path and an air cavity communicating with the air path. Inner rings of the inner friction plates are arranged on the spline shaft sleeve through spline connection. The multiple outer friction plates are closely attached in gaps of the adjacent inner friction plates. Outer rings of the outer friction plates are slidably connected with the shell. The extrusion part applies axial force to the outer friction plates and the inner friction plates. The dry type parking brake is simple in structure and good in braking effect, thesituation that the friction plates generate heat and consequently are eroded can be effectively avoided, and thus the stability of the brake is improved.

Description

technical field [0001] The invention relates to the technical field of chassis braking systems, in particular to a dry parking brake. Background technique [0002] The traditional dry brake is mainly composed of outer friction plate, inner friction plate, pressure plate, piston, fixed element, rotating element, return spring and other parts. The braking principle is: when the brake is applied, high-pressure oil enters the brake. in the piston cavity, forcing the piston to move. At this time, the return spring is compressed, and the piston compresses the inner and outer friction plates, thereby implementing braking. When the high-pressure oil returns to the oil tank, the piston returns under the action of the return spring, so that the inner and outer friction plates are separated, thereby releasing the brake. [0003] The brakes in the prior art tend to generate heat in the non-braking state, and the higher the speed is, the more obvious the heat will be. The heat can lead...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a dry parking brake, which solves or partially solves the technical problem in the prior art that the friction plate of the brake is easy to heat, which leads to serious consequences of brake failure caused by ablation of the friction plate, realizes a simplified structure, and manufactures The dynamic effect is good, and it can effectively avoid the heat and ablation of the friction plate and improve the technical effect of the brake stability.

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