CN203515382U

CN203515382U - Fast-changing slips type chuck

Info

Publication number: CN203515382U
Application number: CN201320564491.3U
Authority: CN
Inventors: 刘学龙; 宋志刚; 董富强; 武卫卫; 徐强
Original assignee: Baoji Oilfield Machinery Co Ltd
Current assignee: Baoji Oilfield Machinery Co Ltd
Priority date: 2013-09-11
Filing date: 2013-09-11
Publication date: 2014-04-02
Anticipated expiration: 2023-09-11

Abstract

The utility model discloses a fast-changing slips type chuck. According to the fast-changing slips type chuck, the two end faces of the chuck body are connected with a rear cover and a front cover respectively, symmetric protruding shoulders are arranged on the opposite end faces of the rear cover and the front cover, and a transfer and pull disk is further installed on the outer end face of the rear cover. A rubber sleeve is arranged between the inner surface of the chuck body and the protruding shoulders of the rear cover and the front cover, and a supporting ring is arranged in a cavity formed by the outer surface of the rubber sleeve and the inner surface of the chuck body. A plurality of concentric slips bases are annularly arranged in an inner cavity of the rubber sleeve, a set of slips are installed in a T-shaped groove of each slips base, and a rubber spring is arranged between every two adjacent slips bases. The fast-changing slips type chuck has the advantages that the hydraulic rubber sleeve chuck is safe and reliable in clamping work and small in rotation inertia, the reliability is guaranteed, and the service life of the rubber sleeve is prolonged.

Description

A kind of quick change slip-type chuck

Technical field

The utility model belongs to mechanical equipment technical field, relates to a kind of quick change slip-type chuck.

Background technology

Existing quick change hydraulic pressure packing element chuck, biography pulling plate wherein will be connected and realize pulling force transmission by twice with chuck body, slip spider and front and rear covers will be realized moment of torsion transmission by torque-transmission disk and bearing pin, the both ends of the surface of every slip spider will be processed some groups of spring base holes, use side by side cylindroid helical-coil compression spring to realize the reset of slip spider, the male and female notch of slip spider and slips is more complicated.

Due to overall structure more complicated, the deficiency in use existing comprises: 1) between slip spider He in spring base hole, easily by coal dust, blocked and cannot normally reset; 2) because torsion pass route is complicated easily loosening, cause slip spider to produce slight torsion, slips damages fast, more renews part inconvenience; 3) backing plate is easily shifted and causes packing element to damage too early.These problems cause fault more, and reliability is inadequate, and application life is short.

Utility model content

The purpose of this utility model is to provide a kind of quick change slip-type chuck, has solved in prior art and has existed fault more, and application life is short, and new part is changed inconvenient problem.

The technical scheme that the utility model adopts is, a quick change slip-type chuck, comprises chuck body, in the both ends of the surface of chuck body, is fixedly connected with bonnet and protecgulum, the end face that bonnet is relative with protecgulum is provided with symmetrical convex shoulder, and the outer face of bonnet is also installed with biography pulling plate; Between the inner surface of chuck body and bonnet and the convex shoulder of protecgulum, be provided with packing element, in the cavity forming between packing element external surface and the inner surface of chuck body, be provided with support ring;

In the inner chamber of packing element, annular is provided with concentric a plurality of slip spiders, and one group of slips is installed in the T-slot of each slip spider, between adjacent slip spider, is provided with rubber spring.

Quick change slip-type chuck of the present utility model, its feature is also:

The outer round surface of rubber spring is provided with backing plate, and the cylindrical of backing plate and the cylindrical of each slip spider all contact with the internal circular surfaces of packing element.

Between the axial two ends of slip spider and protecgulum and bonnet, adopt male and female draw-in groove to be slidably connected.

Biography pulling plate, bonnet are directly connected by a circle securing member with chuck body.

Bonnet, chuck body, packing element, protecgulum, support ring form monolateral pliable pressure cavity volume jointly; Bonnet is provided with the body interior of chuck body the oil duct being communicated with, and oil duct passes in monolateral pliable pressure cavity volume, and the contact surface of this oil duct between bonnet and chuck body is provided with sealing ring.

The beneficial effects of the utility model are to have simplified chuck structure and power transmission route; When changing the slips of different specification size, only need to lay down protecgulum, slips is extracted out from slip spider, straight pin is inserted to the T-shaped groove of putting into again slip spider in the pin-and-hole of new slips, protecgulum is finally installed, realize quick-replaceable object; Have advantages of that hydraulic pressure packing element chuck clamps safe and reliable and dynamic moment of inertia is little, and solved difficult sealing and packing element short problem in application life between slip spider, from structure, guarantee reliability and the application life that extends packing element.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model device;

Fig. 2 is the oil duct partial structurtes schematic diagram of the utility model device;

Fig. 3 is the axial arrangement schematic diagram of the utility model device.

In figure, 1. pass pulling plate, 2. bonnet, 3. chuck body, 4. protecgulum, 5. support ring, 6. slip spider, 7. slips, 8. rubber spring, 9. backing plate, 10. packing element, 11. sealing rings, 12. securing members, 13. straight pins.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.

With reference to Fig. 1, Fig. 2, Fig. 3, structure of the present utility model is, comprises chuck body 3, in the both ends of the surface of chuck body 3, is fixedly connected with bonnet 2 and protecgulum 4, the end face that bonnet 2 is relative with protecgulum 4 is provided with symmetrical convex shoulder, and the outer face of bonnet 2 is also installed with and passes pulling plate 1; Between the inner surface of chuck body 3 and bonnet 2 and the convex shoulder of protecgulum 4, be provided with packing element 10, in the cavity forming between packing element 10 external surfaces and the inner surface of chuck body 3, be provided with support ring 5; Bonnet 2, chuck body 3, packing element 10, protecgulum 4, the monolateral pliable pressure cavity volume of support ring 5 common composition;

In the inner chamber of packing element 10, annular is provided with concentric a plurality of slip spiders 6, in the T-slot that each slip spider 6 internal circular surfaces is axially offered, one group of slips 7 is installed, and between adjacent slip spider 6, is provided with rubber spring 8, and the outer round surface of rubber spring 8 is provided with backing plate 9; The cylindrical of the cylindrical of backing plate 9 and each slip spider 6 all contacts with the internal circular surfaces of packing element 10;

Passing pulling plate 1, bonnet 2 and chuck body 3 is directly connected by a circle securing member 12, realize fixing reliably between three, at bonnet 2, be provided with the body interior of chuck body 3 oil duct being communicated with, oil duct passes in monolateral pliable pressure cavity volume, and the contact surface of this oil duct between bonnet 2 and chuck body 3 is provided with sealing ring 11.

Slips 7 fills as required by different specifications, in slips 7, is processed with pin-and-hole, and slips 7 is fixed in the T-slot of slip spider 6 by straight pin 13.

Pass pulling plate 1 endoporus and be processed with internal thread, bonnet 2 end faces are processed with the keyway coordinating with straight end-face key, for coordinating of bonnet 2 and slip spider 6.

Between the axial two ends of slip spider 6 and protecgulum 4 and bonnet 2, adopt male and female draw-in groove to be slidably connected; Slip spider 6 adjacent faces are all processed with spring base, place rubber spring 8 or have equally the rubber-spring complex of sealing function between slip spider 6;

Embodiment in Fig. 1, Fig. 3, adopts rubber spring 8 and the clamping assembly of backing plate 9 formations to slip spider 6, and between backing plate 9 and slip spider 6, increases the spacing draw-in groove fit structure of backing plate 9 playback while being used for clamping.

When changing the slips 7 of different specification size, only need to lay down protecgulum 4, take out straight pin 13, slips 7, from the interior extraction of slip spider 6, will straight pin 13 be inserted to the T-shaped groove of putting into again slip spider 6 in the pin-and-hole of new slips, protecgulum 4 is finally installed.

The operating principle of the utility model device is:

With reference to Fig. 2, Fig. 3, the oil duct being communicated with by bonnet 2, sealing ring 11 and chuck body 3 when pressure oil enters after monolateral flexible annular pressure chamber, packing element 10 inwardly expands, and slip spider 6 and slips 7 radially slide to axis direction under the constraint of the two ends of protecgulum 4 and bonnet 2, clamping drilling rod; After pressure oil pressure release discharges, under the effect of rubber spring 8 restoring forces, slip spider 6 and slips 7 radially outwards move diffusion and come, and unclamp drilling rod.

Quick change slip-type chuck of the present utility model, for all-hydraulic power head underground drill rig, has been simplified traditional chuck structure, has solved the sealing between slip spider and has prevented that backing plate from piercing through the problem of packing element; When changing the slips of different specification size, only need to lay down protecgulum 4, just slips can be extracted out from slip spider, without disassembling other parts, realized quick-replaceable.

Claims

1. a quick change slip-type chuck, its feature is: comprise chuck body (3), both ends of the surface at chuck body (3) are fixedly connected with bonnet (2) and protecgulum (4), bonnet (2) is provided with symmetrical convex shoulder with the relative end face of protecgulum (4), and the outer face of bonnet (2) is also installed with and passes pulling plate (1); Between the inner surface of chuck body (3) and bonnet (2) and the convex shoulder of protecgulum (4), be provided with packing element (10), in the cavity forming between packing element (10) external surface and the inner surface of chuck body (3), be provided with support ring (5); Bonnet (2), chuck body (3), packing element (10), protecgulum (4), support ring (5) form monolateral pliable pressure cavity volume jointly;

In the inner chamber of packing element (10), annular is provided with concentric a plurality of slip spiders (6), and one group of slips (7) is installed in the T-slot of each slip spider (6), is provided with rubber spring (8) between adjacent slip spider (6).

2. quick change slip-type chuck according to claim 1, its feature is: the outer round surface of described rubber spring (8) is provided with backing plate (9), and the cylindrical of the cylindrical of backing plate (9) and each slip spider (6) all contacts with the internal circular surfaces of packing element (10).

3. quick change slip-type chuck according to claim 1, its feature is: between the axial two ends of described slip spider (6) and protecgulum (4) and bonnet (2), adopt male and female draw-in groove to be slidably connected.

4. quick change slip-type chuck according to claim 1, its feature is: described biography pulling plate (1), bonnet (2) and chuck body (3) are directly connected by a circle securing member (12).

5. quick change slip-type chuck according to claim 1, its feature is: described bonnet (2) is provided with the body interior of chuck body (3) oil duct being communicated with, oil duct passes in monolateral pliable pressure cavity volume, and the contact surface of this oil duct between bonnet (2) and chuck body (3) is provided with sealing ring (11).