SU1539302A1 - Drilling rig chuck - Google Patents

Abstract

The invention relates to the mining industry and makes it possible to increase the maintainability of a drill chuck while maintaining reliability. Between the upper 9 and lower 10 flanges of the body 1 of the cartridge is placed a mechanism 2 for fixing the drill rod (BS) 3 containing a faceplate (PN) 6, in the slots 7 of which clamping elements are installed in the form of fists 8. A cross bar is installed in the case 1 to interact with the PN 6 4. The fixing mechanism 2 has a drive in the form of hydraulic cylinders (HZ) 11, 12 of single-acting with plungers 21, 22 installed in the upper 9 and lower 10 flanges. Plunger 21 and 22 Hz 11 and 12 have annular protrusions 24 for engaging with stops 25 on flanges 9 and 10, and the housing interacts with crosshead 4 by means of stops 17 and 18. As a result of moving the PN 6, the clamping knives 8 in the grooves 7 move radially against the stop in BS 3 and pressed against it with the force necessary to transmit the specified torque values from the rotator and the axial force from the HZ feed to the drilling tool. When the working fluid is fed through the channel 16 into the cavity 14 Hz 12, the latter stops with the stops 18, interacting with the end surface of the crosshead 4, move it axially towards the flange 9 together with PN 6. As a result, the cams 8 are unfolded relative to BS 3. 1 sludge.

Description

The pushing knuckles 8 move radially against the stop in BS 3 and are pressed against it with a force necessary for setting drill tools with predetermined torque values from the rotator and axial force from the HZ feed. When serving ra15393024

The fluid through the channel 16 into the cavity 14 HZ 12 last stops 18, interacting with the end surface of the crosshead 4, move it in the axial direction towards the flange 9 together with PI 6. As a result, the cams 8 are unfolded relative to BS 3. 1 Il.

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1 The invention relates to the mining industry, in particular to the chisels of a drilling rig.

The purpose of the invention is to increase the availability of reliability while maintaining the reliability of work.

The drawing shows the chuck of the machine tool.

The chuck of the drilling machine includes an orb 1 in which the mechanism 2 fixes the drill rod 3 is placed. The fixation mechanism 2 includes a traverse 4 with a radial-stop bearing 51, inside which is placed the faceplate 6, in the slots 7 of which there are clamps in the form of fists 8. In The upper 9 and lower 10 flanges of the chuck are mounted axially to the longitudinal axis of the drill rod 3 hydraulic cylinders 11 and 12 of one-sided action, respectively, with working cavities 13 and 14, communicated via channels 15 and 16 with the pressure and drain lines of the hydraulic system of the drilling rig (n not shown). Hydraulic cylinders 11 and 12 of one-sided action are provided with stops 17 and 18, respectively, which interact with the upper 19 and lower 20 end surfaces of the traverse 4, which forms a plunger pair with the body of the cartridge.

The plungers 21 and 22 of the hydraulic cylinders 11 and 12 are single-acting and are equipped with sealing elements 23 and are provided with annular projections 2k. The upper 9 and lower 10 flanges are provided with removable stops 25, made in the form of a sleeve 26, in which a nut 27 is mounted on the thread, interacting with an annular protrusion 24 of a single-acting hydraulic ram plunger. To fix the single-acting hydraulic ram plunger to the nut 27, the hydraulic cylinder is provided with a retaining ring 28.

The cartridge is operated as follows.

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When supplying the working fluid from the machine hydraulic system through the channel 15 into the cavity 13 of the hydraulic cylinder 11 of unilateral action, the latter with its stops 17, interact with the upper end surface 19 of the crosshead 4, moves the latter in the axial direction towards the lower flange 10 together with the angular contact bearings 5 and faceplate 6. As a result of the movement of the faceplate 6 located in the grooves 7 of the latter, the clamping jaws 8 move in the radial direction against the stop in the drill stand 3 and are pressed against the latter with the force necessary for transferring the set torque values from the rotator and axial force from the feed cylinders to the drilling tool.

The movement of the drill rod 3 in the axial direction is carried out on the stroke of the hydraulic cylinders supplying the drill rod. When supplying the working fluid from the hydraulic system of the machine through the channel 16 into the cavity 14 of the hydraulic cylinder 12 of one-sided action, the latter with its stops 18, I will interact with the lower end surface 20 of the crosshead 4, moves the latter in the axial direction towards the upper flange 9 together with the angular contact bearings 5 and faceplate 6. P as a result of movement of faceplate 6, the clamping cams 8 are released against the drill rod 3.

When leaving the sealing element 23, it suffices to remove the retaining ring 28, unscrew the nut 27 and remove the plunger from the single-acting hydraulic cylinder. After replacing the sealing element 23, the one-way hydraulic cylinder is assembled in reverse order.

The use of the proposed technical solution makes it possible to reduce the downtime of drilling machines and to increase their operational performance, while maintaining reliability of operation by ensuring uniform efforts to fix and unclamp the cartridge.

Claims (1)

Invention Formula Drill rig cartridge incorporating a KopnyCj between which upper and lower flanges accommodates a drilling rod fixing mechanism containing a faceplate, in the grooves of which clamping knuckles and a drive mechanism are installed different „V fixing By the fact that, in order to improve the repair suitability while maintaining reliability, it is equipped with a cross bar mounted in the body of the cartridge to interact with the faceplate, and the fixation mechanism is designed as single-acting hydraulic cylinders with plungers installed in the upper and lower flanges, and the plunger the hydraulic cylinders have annular projections to interact with the stops made on the flanges, and the bodies are installed with the possibility of interaction with the crosshead.