The invention provides a drum type service braking device which comprises a brake hub, a brake base plate, brake shoes, a brake master cylinder and friction plates, wherein a hub tube of the brake hub of the brake device consists of a cylindrical surface and a conical surface combined structure; the small end of the conical surface faces the direction of a connecting flange; one section of transitional cylindrical surface is positioned between the hub tube of the brake hub and the connecting flange and is used for a mounting and positioning surface of the brake hub and the wheel hub; a mounting space of a connecting bolt is formed among the hub tube, the outer surface of the transitional cylindrical surface and the connecting flange; reinforcing ribs are uniformly distributed in the mounting space along the axial direction of the hub tube. According to the drum type service braking device disclosed by the invention, the service life of the brake hub is greatly prolonged, the working performance of the brake hub is greatly improved, safety and comfort of vehicles in the driving process are improved, and the occurrence probability of serious accidents caused by damage to the brake hub is greatly reduced; along with the prolonging of the service life of the brake hub, the manufacturing cost is reduced, and pollution to the environment is reduced.
Drum type service braking device
2015-11-25
Patent
Electronic Resource
English