| 摘要 |
A ratchet open end wrench includes a wrench body provided with an operation head, a ratchet unit mounted on the operation head, and at least one drive unit mounted on the wrench body and engaged with the ratchet unit. The ratchet unit includes a ratchet member provided with a plurality of oneway ratchet teeth. The drive unit includes a pawl member provided with a plurality of oneway driving teeth engaged with the oneway ratchet teeth. Thus, the ratchet member is driven by the pawl member to rotate a workpiece, so that the reaction force applied by the workpiece onto the operation head is shared by and distributed on the drive unit and the wrench body to prevent the force from being concentrated on the operation head.
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