| 主权项 |
1. A switching device adapted for use in a pneumatic tool, the pneumatic tool including a tool body and a pneumatic motor, the tool body including a handle portion that extends along an X axis, and a head portion that is connected to an end of the handle portion, the handle portion having an inlet flow path that extends along the X axis and that is formed through an opposite end of the handle portion for permitting compressed air to flow thereinto, the pneumatic motor being disposed in the head portion, and including a cylinder that defines an air chamber, and first and second flow channels communicating fluidly with the air chamber, and a rotor that is disposed rotatably in the air chamber, said switching device comprising:
a valve member adapted to be disposed in the inlet flow path and in contact with the cylinder, and having a valve body that defines an intermediate flow path therethrough, said valve member being rotatable relative to the tool body between a first position where said intermediate flow path communicates fluidly the inlet flow path and the first flow channel, and a second position where said intermediate flow path communicates fluidly the inlet flow path and the second flow channel, such that the rotor is rotatable in two opposite directions; a connecting member adapted to be disposed in the inlet flow path, and coupled to an end of said valve member opposite to the pneumatic motor in a manner such that said connecting member drives the rotation of said valve member between the first and second positions and that an assembly of said valve member and said connecting member is flexible, so as to establish an air-tight seal between said valve member and the pneumatic motor; and an operating unit adapted to be mounted operably on the handle portion and coupled co-rotatably to said connecting member. |
