Brake cylinder device and disc brake device

Abstract

Disclosed is a compact brake cylinder device which, while avoiding increases in the size of the device, is capable of increasing the braking force outputted from a brake output unit which moves together with a rod. A rod (22) is provided inside of a cylinder body (20) so as to freely move in the advancing and retracting directions of the cylinder shaft direction. A piston (24) partitions a pressure chamber (44) inside of the cylinder body (20), surrounding the circumference of the rod (22), and moves in a linear direction parallel to the movement direction of the rod (22). By supplying a pressure fluid to the pressure chamber (44), the piston (24) resists the biasing force of a biasing spring (23) and moves in the retracting direction relative to the cylinder body (20). At that time, a force-multiplication mechanism (25) converts the linear direction drive force generated by the piston (24) to a rotational direction, moves the rod (22) in the advancing direction, and multiplies the drive force from the piston (24) to act on the rod (22). A brake output unit (21) moves together with the rod (22) in the advancing direction and outputs a braking force.

Description

technical field [0001] The present invention relates to a brake cylinder device which operates with pressure fluid to move a rod, and a disc brake device having the brake cylinder device. Background technique [0002] Conventionally, as a disc brake device for a rail vehicle having a brake cylinder device, a disc brake device for a rail vehicle having a brake cylinder device disclosed in Patent Document 1 is known. The disc brake device disclosed in Patent Document 1 is configured to protrude a rod in a brake cylinder device using air pressure. In addition, in this disc brake device, a pair of brake rods of the caliper body mounted so as to be displaceable relative to the vehicle in the axle direction are respectively connected at one end side to the rod side of the brake cylinder device and to the circle constituting the cylinder body. The cylindrical members are connected side by side. And, by operating the brake cylinder device as described above, the pair of brake leve...

AI Technical Summary

Problems solved by technology

However, when a large braking force is required, there is a problem that the diameter of the cylinder main body becomes larger, resulting in an increase in the size of the entire brake cylinder device.

In addition, if the brake cylinder device is enlarged, there will also be a problem that the disk brake device will also be enlarged.

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