Fastener pulling and twisting device

Abstract

The invention provides a fastener pulling and twisting device. The fastener pulling and twisting device aims at improving pulling and twisting efficiency on the premise of tightening fasteners. The fastener pulling and twisting device comprises a fixed seat and a movable seat which is movably assembled on the fixed seat in the arrangement direction of the fasteners; directions used for being in the axial directions of the fasteners and being away from the fasteners are defined as the working directions, and hydraulic fastening wrenches used for tightening the fasteners are arranged on the movable seat in a guiding and moving mode in the working directions; and first driving structures used for driving the hydraulic fastening wrenches to be in butt joint with and separated from the fasteners are further arranged on the movable seat, the movable seat is further provided with pneumatic pre-tightening wrenches which are movably arranged on the movable seat in a guiding mode and in the working directions, wherein the pneumatic pre-tightening wrenches are used for pre-tightening the fasteners before hydraulic fastening wrenches tighten the corresponding fasteners, and second driving structures used for driving the pneumatic fastening wrenches to be in butt joint with and separated from the fasteners are further arranged on the movable seat. According to the fastener pulling and twisting device, during specific use, switching of the hydraulic fastening wrenches and the pneumatic pre-tightening wrenches can be completed only by operating the movable seat by a person.

Description

technical field [0001] The invention relates to a fastener wrenching device. Background technique [0002] In the field of mechanical assembly, manual hand-held pneumatic wrench and hydraulic wrench are generally used to pre-tighten and fasten the bolts one by one when fastening large-size bolts. [0003] An invention patent application with the application publication date of January 14, 2015 and the application publication number of CN104275667A discloses a fastener wrench device. The fastener wrench device includes a fixed seat on which the There is a movable seat, on which at least two fastening wrenches are evenly spaced along the circumference, the fastening wrench includes a fastening wrench mounting plate that guides and moves and is assembled on the movable seat, near the fastening wrench mounting plate One side of the fastener is provided with a tightening wrench socket, and the other side is provided with a tightening wrench drive. The tightening wrench drive can...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the fastening wrench can be a pneumatic wrench, a hydraulic wrench or an electric wrench. If the fastening wrench all adopts an electric wrench, the cost of the fastener wrench device is high and the cost is large

Moreover, it can be known from common knowledge that the turning speed of the pneumatic wrench is fast, but the wrenching torque of the pneumatic wrench is small. Only the pneumatic wrench can be used to screw on the fastener very quickly, but it is easy to cause the fastener to loosen later. The wrench torque of the hydraulic wrench is large, but the wrench rotation speed of the hydraulic wrench is slow. Although only the hydraulic wrench can fasten the fastener in place, the speed is slow, which is not conducive to the wrench efficiency. promote

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