Rocking wrench capable of being selectively locked or unlocked

Abstract

The invention discloses a rocking wrench capable of being selectively locked or unlocked. The rocking wrench comprises a grab handle, a shifting piece, a support pillar, a positioning device, a pawl and a wrenching head, wherein the wrenching head is pivoted with the grab handle, the toothed part of the wrenching head can be meshed with the toothed part of the pawl, and the shifting piece can be switched between an unlocking position and a locking position; when the shifting piece is in the unlocking position, the positioning device is butted with the first end of the support pillar, the second end of the support pillar is butted with the first butting face of the pawl, the toothed part of the pawl is meshed with the toothed part of the wrenching head, and the grab handle and the wrenching head can relatively rock; and when the shifting piece is in the locking position, the concave hole of the shifting piece corresponds to the positioning device, a second butting edge is butted with the first butting face of the pawl, the toothed part of the pawl is further meshed with the toothed part of the wrenching head, and the pawl can not freely move in a communication hole, so that the pawl and the wrenching head are positioned.

Description

technical field [0001] The invention discloses an oscillating head wrench, in particular to an oscillating head wrench which can be selected to be locked or not locked. Background technique [0002] With reference to the US Patent No. 7509893 (Locking device for locking pivotable head of hand tool) patent case, it mainly includes: a handle, at least one end of the handle extends with an engaging portion, and the end of the engaging portion is recessed inwardly with a preset The depth of the pivot joint groove, the surface is provided with a slot hole, the front end of the slot hole just communicates with the container at the bottom end of the pivot joint slot, and the ears on both sides of the pivot joint slot are coaxially opened with a perforation; a toggle unit, including the container The rod part is set in the slot hole and can rotate relative to the slot hole, and the paddle is located outside the connecting part for operation. The middle part of the rod part is provid...

AI Technical Summary

Problems solved by technology

In order to limit the elastic part to the pawl, some measures must be taken so that the elastic part will not automatically disengage from the pawl. The aforementioned design adopts the use of fasteners or indentations in the groove to further prevent the elastic part from detaching from the pawl, whether it is a fastener Or the indentation is easy to cause the swing head wrench to drop and make the elastic part break away from the container. Therefore, this design has flaws and needs to be improved.

And when the elasticity of the elastic part is aging, the elastic part will affect the precise positioning between the pawl and the trigger head, and there will be looseness

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