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Open-type hydraulic torque wrench

A torque wrench, open-ended technology, applied in the field of hydraulic tools, can solve the problem of difficult control of tightening torque, and achieve the effect of simple structure, accurate torque setting and convenient use

Inactive Publication Date: 2013-12-11
杜德机械科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a kind of connection that is connected by a screw. This connection requires a large and constant tightening torque. Generally, it cannot be tightened by manpower, and the tightening torque is not easy to control. It can only be operated with a hydraulic wrench. The traditional A hydraulic torque wrench that tightens the hexagonal nut through the axial sleeve of the nut is not up to the job

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] a), set torque:

[0013] The working torque of the present invention is directly proportional to the working pressure of the hydraulic system. The present invention is provided with a torque comparison table on the wrench body 1, and the working pressure value of the hydraulic system is correspondingly set according to the torque value set by the nut to be tightened.

[0014] b), Install the wrench head:

[0015] refer to figure 1 , figure 2 , select the wrench head 2 corresponding to the size of the nut, open a side wall plate 11 of the wrench body 1, set the boss 24 of the wrench head 2 in the open hole 12 of the wrench body 1, and place the wrench head 2 The hinge shaft 21 is hinged with the piston rod of the oil cylinder 44, and finally, the side wall plate 11 of the wrench body 1 is covered and fastened.

[0016] c), the present invention works like this:

[0017] refer to figure 1 , figure 2 , the opening 22 of the wrench head 2 is clamped on the outside o...

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Abstract

The invention discloses an open-type hydraulic torque wrench which comprises a wrench body, a wrench head, a wedge block assembly and a hydraulic cylinder assembly, wherein the wrench body is provided with an open round hole and an axle bed, the wrench head is provided with a hinged shaft, a rounded boss, sliding chutes and a hinge pin, the hydraulic cylinder assembly is hinged with the wrench body, the boss of the wrench head is arranged in the open round hole of the wrench body, the hinged shaft of the wrench head is hinged with a piston rod of an oil cylinder, and the wedge block assembly is arranged in the sliding chutes on both sides of the wrench head. According to the invention, the design of the wedge block assembly is adopted, the wrench head is clamped on the outer side of a nut, and a torque is transmitted in a continuous swinging mode along the radial direction of the nut, therefore, the open-type hydraulic torque wrench has the advantages of simple structure, convenience for use, and accurate torque setting.

Description

technical field [0001] The invention relates to the technical field of hydraulic tools, in particular to an open-type hydraulic torque wrench. Background technique [0002] The driving part of the existing hydraulic torque wrench, especially the hollow hydraulic torque wrench, must be a complete closed loop when working. The hydraulic torque wrench is tightened by the axial sleeve of the screw or nut on the hexagonal nut (or bolt). If you need to tighten a set of butt screws on the pipeline, and the pipeline is very long or there are obstacles at both ends, the ordinary hydraulic wrench cannot be used. The most typical example: where reinforced concrete components are used in bridges, buildings, elevated roads, etc., in order to realize the docking of two components, the threaded steel bars on the end faces of the two components must be connected together, and the connection must be firm and able to carry Component prestress. There is a kind of connection that is conn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/00B25B23/00
Inventor 林尚波
Owner 杜德机械科技(上海)有限公司
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