| 摘要 |
A belt sander includes a frame, a support seat, a first wheel rod, a second wheel rod, a sand belt, an adjusting unit, and an operation unit. Thus, the operation handle of the operation unit is rotated to rotate the drive shaft which rotates the drive bevel gear which rotates the driven bevel gear which rotates the driven shaft which rotates the threaded rod to move the slide rod by rotation of the threaded rod so that the slide rod moves the support seat relative to the frame to move the first wheel rod relative to the second wheel rod to change the distance between the first wheel rod and the second wheel rod so as to adjust the tension of the sand belt.
|
