Normally-closed strip-shaped slip chuck for small cylinder spring set

Abstract

The invention relates to a normally-closed strip-shaped slip chuck for a small cylinder spring set. The normally-closes strip-shaped slip chuck for the small cylinder spring set comprises a fixed nit assembly, a slip rotating unit assembly, a fixedly-rotary separating unit assembly and a drilling rod water dust blocking unit assembly. The slip rotating unit assembly comprises a slip set, a slip seat and a spring seat. External annular combining spring sets and internal annular spring sets are evenly distributed in annular cylindrical holes formed by matching of the slip seat and the spring seat, and original clamping force of the slip set is provided. A hydraulic chuck which is small in structural size, high in capability and rapid in opening is provided, pressure oil with relatively-high pressure is needed to be provided for a hydraulic system in the working process of the hydraulic chuck is solved, and the problem that the installing operation is not convenient during slip replacing due to the fact that the elastic component characteristic cannot meet the using requirement of the chuck with the big capacity is solved.

Description

technical field [0001] The invention relates to a mechanical clamping device, in particular to a normally closed strip slip chuck with a small cylindrical spring group. Background technique [0002] The chuck is an important component of the mechanical clamping device. It is installed at the end of the power unit. Its main function is to clamp the pipe, transmit torque and axial force to the drilling tool, and complete the energy transmission. [0003] At present, common hydraulic chucks mainly include normally open hydraulic chucks and normally closed hydraulic chucks, of which normally open hydraulic chucks are mainly rubber cartridge chucks, and normally closed chucks are mainly disc spring type chucks . When the rubber cylinder type hydraulic chuck is working, it is clamped by hydraulic pressure and the spring is loosened. Therefore, the pressure requirement on the hydraulic system is higher. The oil distribution sleeve in the oil supply system has a certain leakage due...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the above-mentioned shortcomings of the prior art, and provides a small cylindrical spring group normally closed strip slip chuck, which also belongs to a small structural size, large capacity, quick-opening hydraulic chuck, and solves the problem of hydraulic pressure. When the chuck is working, the hydraulic system needs to continuously supply high-pressure hydraulic oil, or the characteristics of the elastic element cannot meet the requirements for the use of a large-capacity chuck, and when replacing the slips, the installation and operation are inconvenient.

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