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Nitrogen spring type hydraulic chuck

A nitrogen gas spring and hydraulic chuck technology, which is used in drilling equipment, earthwork drilling, drill pipe, etc., can solve the problems of troublesome replacement, short life and high cost, and achieve convenient replacement and maintenance, long service life and stable performance. Effect

Inactive Publication Date: 2012-05-02
JIANGSU WUXI MINERAL EXPLORATION MASCH GENERAL FAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interior of the hydraulic chuck with a capsule structure is made of rubber, which is easily damaged by extrusion during use, has a short life, is troublesome to replace, and costs a lot

Method used

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  • Nitrogen spring type hydraulic chuck
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Embodiment Construction

[0009] Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:

[0010] The present invention mainly includes a piston rod 3, a piston 5, a cylinder 6 and a chuck upper shell 24, the piston rod 3 is mounted on the chuck upper shell 24 through a washer 25 and a bolt 26, and the cylinder 6 is sleeved on the piston rod 3 On the outer ring, the piston 5 is located in the piston chamber between the piston rod 3 and the cylinder 6, the piston 5 is fixed on the piston rod 3 through the first key 4, and the slip seat 1, spring seat 2. Nitrogen gas spring 7 and slips 10, the piston rod 3 and the inner ring of the chuck upper shell 24 are installed with a slip seat 1, and the spring seat 2 is fixed by a washer 34 and a screw 35 on the end surface of the lower flange of the slip seat 1 The lower end of the nitrogen spring 7 is fixed on the spring seat 2 through the washer 32 and the screw 33; the first pressure plate 8 is arra...

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Abstract

The invention relates to a nitrogen spring type hydraulic chuck, and in particular relates to a drilling tool for a clamping drilling machine, belonging to the mechanical technical field of the drilling machine. The nitrogen spring type hydraulic chuck mainly comprises a piston rod, a piston, a cylinder barrel, a chuck upper shell, slip bowls, spring seats, a nitrogen spring and a slip element, wherein the piston rod is arranged on the chuck upper shell, the cylinder barrel is sleeved on the outer ring of the piston rod, the piston is in a piston chamber between the piston rod and the cylinder barrel, slip bowls are arranged on the piston rod and the inner ring of the chuck upper shell, the spring seats are fixed on the lower flanged end faces of the slip bowls; and the lower end of the nitrogen spring is fixed on the spring seats. The nitrogen spring type hydraulic chuck has a simple, compact and reasonable structure; by using nitrogen as the chuck elastic element, the changes of the elasticity are little and the performance is stable; the nitrogen spring has long service life and is convenient for replacement and maintenance; the hydraulic pressure of the oil line is utilized to realize full-process control; the hydraulic pressure is utilized to control the drilling tool to clamp or loosen; and the slope structure of the slip element is used to convert an axial force to a radial force, thus the clamping force of the chuck is increased.

Description

technical field [0001] The invention relates to a nitrogen spring type hydraulic chuck, in particular to a drilling tool for clamping a drilling rig, and belongs to the technical field of drilling rigs. Background technique [0002] When the drilling rig is working, its chuck is used to clamp the drilling tool. The interior of the traditional drilling rig chuck is a combination of multiple sets of springs, which clamp the drilling tool by spring force, and transmit torque and axial force to the drilling tool through the chuck to complete the drilling action. The internal force of the traditional chuck is complicated, and only when the drill pipe is clamped can it rotate, otherwise it is easy to burn out the bearing and other parts, and it is difficult to realize the full control of the hydraulic pressure in the chuck. Although the hydraulic chuck of the capsule structure makes up for the shortcomings of the above-mentioned traditional structure, it completely relies on hydr...

Claims

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Application Information

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IPC IPC(8): E21B19/10
Inventor 朱利根
Owner JIANGSU WUXI MINERAL EXPLORATION MASCH GENERAL FAB CO LTD
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