| 摘要 |
<p>A multifunctional sander includes a casing, a motor mounted in the casing, a switch controlling the motor to rotate bidirectionally, a first driving shaft driven by the motor, an eccentric device coupled with the first driving shaft, a grinding plate coupled with the eccentric device and an oscillating frame connected with the casing elastically. The sander also includes a unilateral clutch between the eccentric device and the oscillating frame. When the motor rotating in the first direction, the clutch makes the oscillating frame couple to the grinding plate and carry out orbital type grinding. When the motor rotating in the second direction, the clutch makes the oscillating frame uncouple with the grinding plate and carry out random orbit grinding. Therefore, the device could switch the grinding means between the orbital type grinding and the random orbit grinding. Accordingly its structure is simple and its cost is reduced.</p> |
