Abstract: A pneumatic motor includes a shell, two covers, a cylinder and a rotor. The shell defines a space, at least one inlet in communication with the space and at least one outlet in communication with the space. Each of the covers defines at least one radial channel and at least one arched channel in communication with the radial channel. The covers are disposed in the central space of the shell while the radial channel is in communication with the inlet. The cylinder defines a central space and at least one inlet in communication with the central space. The cylinder is located between the covers so that the central space thereof is in communication with the arched channels of the covers and that the inlet thereof is communication with the inlet of the shell. The rotor includes a plurality of fins movably mounted thereon.

Abstract: A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a support seat, a cam, a cover, and a hammer. Thus, the pivot shaft of the hammer has two opposite sides each formed with a reinforcing rib to reinforce the structural strength of the hammer. In addition, each of the first pivot shaft and the second pivot shaft has a guide groove to overcome the shear stress applied on the hammer during the rotation striking process of the hammer, thereby preventing the hammer from being distorted or broken due to concentration of a stress so as to enhance the lifetime of the hammer.

Abstract: A pneumatic wrench includes a pneumatic motor, a striking portion, and a drive shaft. The striking portion includes a support seat, a first pin, a second pin, a first hammer, and a second hammer. Thus, the locking strip of the first hammer and the locking strip of the second hammer increase the thickness of the first hammer and the second hammer respectively to reinforce the structural strength of the first hammer and the second hammer, thereby preventing the first hammer and the second hammer from being broken due to vibration so as to increase the lifetime of the first hammer and the second hammer.

Abstract: A pneumatic wrench includes a pneumatic motor, a striking portion, and a drive shaft. The striking portion includes a support seat, a first hammer, and a second hammer. Thus, the first hammer and the second hammer are driven by the fixed pins and the movable pins of the support seat respectively, thereby preventing the fixed pins and the movable pins from being worn out or broken due to a stress concentration so as to increase the lifetime of the pneumatic wrench. In addition, the connecting rib is located between and connected to the first driven block and the second driven block of the drive shaft so as to enhance the structural strength of the drive shaft.

Abstract: A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a cylindrical support seat, a cam, a cover, and a hammer. The hammer has a protruding engaging portion and a reinforcing rib juxtaposed to the engaging portion to reinforce the structural strength of the hammer. Thus, the two opposite sides of the hammer are connected by the reinforcing rib to reinforce the structural strength of the hammer, thereby preventing the hammer from being distorted or broken due to concentration of a stress so as to enhance the lifetime of the hammer.