Automobile drum type brake cylinder piston lubricating device

The utility model provides a piston lubricating device for an automobile drum brake cylinder, which relates to the technical field of brake cylinders and mainly comprises a pump body and a piston, a connecting piece is fixedly mounted on the side wall of the pump body, and a bolt hole and an oil inlet hole are arranged on one side of the connecting piece. Before the piston is installed inside the pump body, the solid lubricating block is inserted along the oil storage hole in the piston, then the piston is assembled inside the sub-pump body, the surface of the piston is sealed with the pump body through the sealing ring, oil is supplied to the inside of the pump body through the oil inlet hole, and the piston is pushed to slide towards the outside of the pump body through oil pressure inside the pump body. The end opening of the piston clamps the brake piece through the clamping groove, the brake piece extrudes the brake pad through the piston to achieve the braking effect, and the piston and the pump body ar