| 摘要 |
A dual-drive ratchet wrench usable in either a reciprocating or nonreciprocating mode is disclosed. The ratchet wrench includes a wrench body having a head portion and a handle portion, a rotatable drive unit, a ratchet mechanism, and a sleeve assembly that is axially translatable along the handle portion. In the reciprocating mode, the sleeve assembly is moved to a disengaged position wherein the wrench is operated by swinging the handle back and forth through an arcuate path. Due to the action of the ratchet mechanism, the drive unit is forced to rotate when the handle portion is swung in one direction, but not the other. In the nonreciprocating mode, the sleeve assembly is moved to an engaged position, wherein an internal gear on the inside of the sleeve engages an external gear on a drive shaft that is coupled to the drive unit. The wrench is operated by rotating the sleeve assembly about an axial centerline through the handle of the wrench. Due to the interconnecting of the sleeve assembly with the drive unit through a bevel gear system, the drive unit rotates when the sleeve assembly is rotated. A retaining mechanism is included to retain the sleeve assembly is either the engaged or disengaged position.
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