Coaxial counter-acting force torque wrench drive tensioner

Abstract

The invention discloses a coaxial counter-acting force torque wrench drive tensioner which comprises an outer sleeve, an inner sleeve and a connecting sleeve. The outer sleeve is of a barrel-shaped structure, an opening in the lower side of the outer sleeve is of an inner polygonal structure or an inner round-tooth-shaped structure, and an opening in the upper side of the outer sleeve is of an inner tooth-shaped structure or an inner key involute spline structure. The inner sleeve is of the structure of a hollow cylinder, the cross section of an inner hole in the upper part of the hollow cylinder is in a quadrangle shape, and the cross section of an inner hole in the lower part of the hollow cylinder is in a hexagon or dodecagon shape. The outer wall of the inner sleeve is in clearance fit with the smooth inner wall of the outer sleeve. An opening in the lower end of the connecting sleeve is of an outer tooth-shaped shape or an outer key involute spline structure, and is in clearance fit with the opening in the upper side of the outer sleeve. An opening in the upper end of the connecting sleeve is provided with inner teeth or an inner key involute spline. The complexity of force borne by the torque wrench drive tensioner is lowered, and the aim that the lateral eccentric load of the torque wrench drive tensioner is zero is achieved; deformation breaking of the tensioner is avoided, and the service life of the tensioner is prolonged; and acting force and counter-acting force drive mounting is convenient and fast.

Description

Technical field [0001] The invention relates to the field of torque wrench-driven stretchers, in particular to a coaxial reaction force torque wrench-driven stretcher. Background technique [0002] Torque wrench is a common tool for tightening or removing large-size bolts. For example, commonly used mechanical torque wrenches include socket holes and arm rods. Commonly used hydraulic torque wrenches, including hydraulic torque wrench body, sleeve, reaction arm, etc. This kind of wrench is subjected to two force systems during the process of tightening or disassembling bolts, one is the anti-torsion force system, and the other is the axial shear force system, and the two force systems form an angle of 90°. In the process of adding force, the two force systems easily cause the bolts to be non-vertical on the flange surface and the lateral bias of the wrench is too large, which reduces the controllable accuracy of the wrench, and the pre-tightening force of the bolt often fails to...

AI Technical Summary

Problems solved by technology

In the process of adding force, the two force systems are likely to cause the bolts to be not vertical on the flange surface and the lateral load of the wrench is too large, which reduces the controllable accuracy of the wrench, and the pre-tightening force on the bolts often fails to achieve the preset effect. , and when the lateral partial load is too large, it may also cause problems such as uneven loading and stress of the bolts

This not only leads to problems such as poor pre-tightening force at high temperature, high pressure, and ultra-low temperature, and easy air and water leakage, especially in the chemical industry, but also shortens the service life of bolts and wastes costs.

Images