| 摘要 |
A pneumatic motor of the present invention is provided for pneumatic tool. The pneumatic motor includes a cylinder, a rotor and a controlling valve. The rotor is rotatably disposed in the cylinder. Two gas passages and an exhaust hole are defined by the cylinder. The exhaust hole extends along a circular direction of the rotor. The exhaust hole has a first end and a second end. The exhaust hole is partially covered by the controlling valve. The exhaust hole has a remained opened portion which is adapted for air to flow therethrough. The controlling valve is adjustable so as to change position of the opened portion. As such, a power stroke in the cylinder is able to be adjusted, so that the power generated by the pneumatic motor is changeable. |
