Double-wedge-shaped hydraulic chuck for drilling machine

Abstract

The invention relates to a hydraulic chuck for a drilling machine, in particular to a double-wedge-shaped hydraulic chuck for a drilling machine. The double-wedge-shaped hydraulic chuck for the drilling machine is applied to the drilling machine for tightly clamping a drill rod arranged on a rotating device, transmitting the torque to the drill rod and realizing the rotating movement of a drilling tool. The double-wedge-shaped hydraulic chuck comprises an inner cylinder body, an inner cylinder body sealing ring, a back outer cylinder body, a back ring sleeve, an inner cylinder body-ring sleeve sealing ring, a buffer gasket, double-wedge-shaped slips, a spring group, an outer cylinder body connecting screw bolt group, a front ring sleeve, a front outer cylinder body, a front cylinder body-front ring sleeve connecting screw group and a buffer gasket locking screw group. The double-wedge-shaped hydraulic chuck for the drilling machine has the advantages that the double-wedge-shaped slip clamping is realized through the pressure of hydraulic oil, the double-wedge-shaped slip releasing is realized through the spring reset force, the structure is novel and reasonable, the double-wedge-shaped hydraulic chuck is of a double-wedge-shaped slip structure, two-way clamping is adopted, the clamping force is great, the clamping is fast, the structural dimension is small, and in addition, the axial stress is zero; after the drill rod is released, the chuck is released only through the spring reset force; an oil path of the double-wedge-shaped slip structure is a single loop, the structure is simple, and the control is simple and convenient.

Description

technical field [0001] The invention relates to a drilling rig hydraulic chuck, in particular to a drilling rig double wedge hydraulic chuck. Background technique [0002] In recent years, with the increase of the drilling depth and hole diameter of drilling rigs, the problems existing in traditional chucks have been gradually exposed. Due to the increase in power of drilling rigs, the torque to be transmitted by chucks has also increased, requiring large clamping force and clamping force. Tight and reliable, under the frequent clamping action of the existing spring clamping chuck structure, the life of the spring will be greatly shortened, resulting in a short life of the chuck, and the spring clamping chuck is bulky, so the hydraulic clamping method becomes The development direction of hydraulic chuck. The clamping force of the hydraulic chuck is equal to the product of the system pressure and the area of ​​the hydraulic oil acting surface. Simply increasing the system pr...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the increase of the drilling depth and hole diameter of drilling rigs, the problems existing in traditional chucks have been gradually exposed. Due to the increase in power of drilling rigs, the torque to be transmitted by chucks has also increased, requiring large clamping force and clamping force. Tight and reliable, under the frequent clamping action of the existing spring clamping chuck structure, the life of the spring will be greatly shortened, resulting in a short life of the chuck, and the spring clamping chuck is bulky, so the hydraulic clamping method becomes The development direction of hydraulic chuck

The clamping force of the hydraulic chuck is equal to the product of the system pressure and the area of ​​the hydraulic oil acting surface. Simply increasing the system pressure or increasing the acting area will not only increase the cost, but also reduce the safety, and make the space between the power pump and the chuck larger, resulting in Rig weight and bulk

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