| 摘要 |
A combination ratchet wrench includes a work end at one end of a handle, a ratchet wheel mounted in the work end, a stop block forced by a spring and a ball into engagement with the ratchet wheel to limit the turning direction of the ratchet wheel for permitting the ratchet wheel to be turned with the handle in one direction to fasten up or loosen a workpiece, wherein the work end has a recessed polygonal hole remote from the handle, the recessed polygonal hole having two angled lateral side walls, and two smoothly arched side walls respectively extended from the angled lateral sides toward the handle; the ratchet wheel has an eccentric coupling rod at one side; a crank pivoted to one side of the ratchet wheel and partially projecting into the recessed polygonal hole for stopping an inserted workpiece in the recessed polygonal hole for turning with the wrench, the crank having a constraint block at one end moved with the crank in the recessed polygonal hole for stopping the inserted workpiece in the recessed polygonal hole.
|
