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Cylindrical roller type hydraulic torque wrench

A torque wrench and cylindrical roller technology, applied in the direction of wrenches, motor tools, screwdrivers, etc., can solve the problems of short service life, limited contact surface contact of ratchet pawls, etc., achieve the effects of reducing wear, increasing contact surface contact, and solving stress concentration

Active Publication Date: 2021-02-02
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a hydraulic torque wrench with compact structure, ingenious design, uniform ratchet force, and hydraulic drive to solve the problem of the limited contact surface of the ratchet and pawl of the existing hydraulic torque wrench. short question

Method used

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  • Cylindrical roller type hydraulic torque wrench
  • Cylindrical roller type hydraulic torque wrench
  • Cylindrical roller type hydraulic torque wrench

Examples

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Effect test

Embodiment 1

[0045] like Figure 1~17 As shown, a cylindrical roller hydraulic torque wrench includes a housing 18, the housing 18 is provided with a driving mechanism, the housing 18 is provided with a transmission mechanism and an actuator, the driving mechanism is connected to the actuator through the transmission mechanism, and the execution The mechanism is provided with a rotating shaft 16, and one end of the rotating shaft 16 extends to the outside of the casing 18;

[0046] The driving mechanism includes an oil inlet assembly 24, and the oil inlet assembly 24 is connected to the transmission mechanism through the first oil inlet hole 86 and the second oil inlet hole 87;

[0047] The transmission mechanism includes a cylinder body, a piston rod 13 is arranged in the cylinder body, and the piston rod 13 is connected to the actuator through a rocker arm 14;

[0048] The actuator is also provided with a ratchet 17 located inside the rocker arm 14 , the ratchet 17 includes cylindrical ...

Embodiment 2

[0065] Working principle: When the piston 5 advances, the piston 5 pushes the piston rod 13, the piston rod 13 pushes the rocker arm 14 to rotate, and the rocker arm 14 drives the cylindrical roller movement 15 to rotate through the notch, and the cylindrical roller 15 and the outer edge of the ratchet 17 The toothed part is in contact with the lower pair, thereby driving the ratchet 17 to rotate, and the ratchet 17 drives the rotating shaft 16 to rotate through the rotating shaft spline 62 .

[0066] During the return stroke of the rocker arm 14, the cylindrical roller 15 of the first stage, the first rocker arm groove area 70 and the first ratchet tooth area 66 of the rocker arm 14 are all in a low-pair contact state, and the cylindrical roller 15 is in a low-pair contact state. The roller bayonet spring 64 is also in the extended state, the cylindrical roller bayonet 63 of the cylindrical roller 15 bears against the bottom 84 of the cylindrical roller limiting groove, and th...

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Abstract

The invention provides a cylindrical roller type hydraulic torque wrench which comprises a shell, wherein a drive mechanism is arranged on the shell, a transmission mechanism and an executing mechanism are arranged in the shell, the drive mechanism is connected to the executing mechanism through the transmission mechanism, the executing mechanism is provided with a rotating shaft, one end of the rotating shaft extends to the outer side of the shell, and the drive mechanism comprises an oil inlet assembly; the oil inlet assembly is connected to the transmission mechanism through a first oil inlet hole and a second oil inlet hole, the transmission mechanism comprises a cylinder body, a piston rod is arranged in the cylinder body and connected to the executing mechanism through a rocker arm,and the executing mechanism is further provided with a ratchet wheel which is located in the rocker arm and comprises a cylindrical roller, and the ratchet wheel is connected to a rotating shaft. Thehydraulic torque wrench is compact in structure, ingenious in design and uniform in ratchet wheel stress; the cylindrical roller assemblies which are evenly distributed in the circumferential direction are adopted as a transmission device between the rocker arm and the ratchet wheel, the number of cylindrical rollers is large, and the contact area is large, so that the problem that the service life is short due to limited ratchet wheel and pawl contact surface connection and stress concentration of an existing hydraulic torque wrench is solved.

Description

technical field [0001] The invention relates to the technical field of assembly tools, in particular to a cylindrical roller hydraulic torque wrench. Background technique [0002] Hydraulic torque wrench is an essential tool in the process of removing large diameter bolts. Compared with the traditional manual mechanical wrench, the hydraulic torque wrench is more portable and can work in a narrow space. In addition, the hydraulic torque wrench can provide a large torque that cannot be matched by manpower under the application of ultra-high pressure hydraulic technology. The torque accuracy of the hydraulic torque wrench acting on the bolt can also meet the requirement of ±3% because of the fine design of its transmission mechanism. Among the causes of mechanical equipment failures, most of them are due to the bolts falling off due to the bolts not being tightened according to the operating torque standard, or the torque force is too large, exceeding the yield strength of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/00B25B23/145
CPCB25B21/00B25B23/145B25B21/004B25B21/005
Inventor 黄天成冯鹏云袁新梅李美求何智恒李子恒
Owner YANGTZE UNIVERSITY
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