A water-cooled and air-cooled drum brake and its braking system

Abstract

The invention discloses a water-cooled and air-cooled automobile drum brake and its braking system. The drum brake comprises a water-cooled brake drum, a brake plug unit, an air outlet unit and a cooling unit, wherein the water-cooled brake drum is provided with on the wheel hub; including, brake shoe assembly, piston assembly and friction plate, the piston assembly and friction plate are respectively connected with the brake shoe assembly; the air outlet unit includes the air outlet pipe and the water outlet air pipe in the drum, and the air outlet pipe in the drum It is arranged on the brake base plate, and the water outlet air duct is arranged on the outside of the water-cooled brake drum. The water outlet air duct includes an outer air outlet pipe and a water outlet pipe, which are communicated with the inner cavity of the water-cooled brake drum; the cooling unit is connected with the air outlet unit. , which includes an air-cooling assembly and a water-cooling assembly, the air-cooling assembly is respectively connected with the air outlet pipe in the drum and the air outlet pipe outside the drum, and the water-cooling assembly is connected with the water outlet pipe; the invention combines water cooling and air cooling to dissipate heat to the drum brake , greatly improving the thermal stability and heat dissipation of automobile drum brakes.

Description

technical field [0001] The present invention relates to the technical field of automobile drum brakes, in particular to a water-cooled and air-cooled automobile drum brake and its braking system. Background technique [0002] The current automobile drum brake is an ordinary drum brake, and its structure is as follows Figures 1 to 4 As shown, the automobile drum brake includes: a cylinder block 1, a piston 3, a return spring 4, a brake base plate 6, a brake shoe 7, a friction plate 8, an air-cooled brake drum 9, a positioning leaf spring 10, and a support pin 11 , support pin gasket 12, support pin nut 13, support ring 14, cylinder bolt 16 and drain bolt 17; bottom plate connecting bolt 5 to fix the brake bottom plate 6, the brake bottom plate 6 does not rotate; air-cooled brake drum 9 The air-cooled brake drum 9 is connected with the wheel rim 21 and the wheel hub 18 through the hub nut 19 and the hub bolt 20, and the air-cooled brake drum 9 rotates with the wheel; The bea...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of ordinary drum brakes is poor thermal stability. It mainly relies on the outer surface of the air-cooled brake drum to contact the air to dissipate heat. The heat dissipation of the moving base plate is low, and when the car brakes continuously down long slopes and frequently brakes on urban roads, the friction plate and the air-cooled brake drum will rub for a long time, resulting in excessive temperature of the friction plate and air-cooled brake drum , because the material of the friction disc contains organic polymers such as resin, as the temperature of the friction disc and the air-cooled brake drum increases, the friction coefficient between the friction disc and the air-cooled brake drum decreases, so that the ordinary drum brake The braking efficiency of the car is reduced, the brake is "soft", and thermal fading occurs. The thermal stability is poor. Traffic accidents are a major safety problem to be solved by the automotive braking system

Images