| 摘要 |
PURPOSE: A piston motor is provided to simplify the structure by mounting a check valve in a first fluid channel to convert the direction of the working flow discharged from the hydraulic chamber to a second fluid channel and slowly displace the brake piston by controlling the flow of the working fluid discharged from the hydraulic chamber. CONSTITUTION: A piston motor includes a rotation shaft a casing(31) for rotatably supporting the rotation shaft, a cylinder block rotating in association with the rotation shaft in the casing, a brake piston(50) mounted in the casing detachably along an axis of the rotation shaft, and an elastic element(54) interposed between the brake piston and the casing for elastically supporting the brake piston toward the axis, so that the brake piston is placed at one side of the axis in resistance against the elastic force of the elastic element when a working fluid is applied more than a predetermined pressure in a hydraulic chamber(53) formed between the brake piston and the casing, while at the other side of the axis by a restoring force of the elastic element when the pressure of the working fluid is decreased below than the predetermined pressure, wherein the casing is formed with a pressure port(65) for supplying the working fluid, and first and second fluid channels(74,75) for supplying or discharging the working fluid and a check valve(80) is mounted in the first fluid channel for shutting off the working fluid flowing from the hydraulic chamber to the pressure port. |
