CN102357863A

CN102357863A - Sleeve-pulling tool

Info

Publication number: CN102357863A
Application number: CN2011102994200A
Authority: CN
Inventors: 韩鑫; 赵晨红; 侯晓军; 王建武
Original assignee: XI'AN AVIATION POWER CONTROL CO Ltd
Current assignee: XI'AN AVIATION POWER CONTROL CO Ltd
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2012-02-22

Abstract

The invention relates to a sleeve-pulling tool, which comprises a hollow sleeve, a screw mechanism and a pull rod mechanism. A tube-shaped piece can be pulled out, by causing a frictional force between the tube-shaped piece and the tool to be more than a frictional force between the tube-shaped piece and a shell. The sleeve-pulling tool is suitable for pulling out various tube-shaped pieces and is further suitable for situations that an inner hole of a pulled sleeve is an unthreaded hole and one end of the pulled sleeve is pressed at the bottom of the inner hole of the shell. The sleeve-pulling tool has the advantages that the inner hole of the sleeve is difficult to scratch and more labor is saved.

Description

Pull out the cover instrument

Technical field

The present invention relates to a kind of cover instrument that pulls out.

Background technology

In producing at the scene, often to some tubular objects (being referred to as lining) that is pressed in the housing bore be taken out.For example, the Aviation Fuel accessory product time often runs into the situation in the housing bore that the lining that has several roads O-ring seal is pressed into needs communication oil circuit in assembling; In this housing assembling process; Sometimes need extract lining, but lining is owing to have certain tightness between the effect of O-ring seal and the housing, and the lining endoporus is generally unthreaded hole; The one of which end is forced at the bottom of the hole of housing, and is as shown in Figure 1.

Thereby traditional cover process of pulling out is to utilize the internal expansion type steel bushing that adapts with the lining endoporus perhaps to make the principle of rubber tube crimp and lining endoporus generation frictional force make specific purpose tool lining is extracted from housing.These two kinds of instruments are not to scratch the lining endoporus easily in the practical application, require great effort very much when pulling out cover exactly, and effect is not fine.

Summary of the invention

The object of the invention is to design a kind of cover instrument that pulls out, and the tubular object (lining) that is pressed in the housing bore is extracted from housing, is difficult for scratching the lining endoporus, and is simultaneously more laborsaving.

Technical solution of the present invention is following:

A kind of cover instrument that pulls out comprises cannulated sleeve, screw rod and drag link mechanism;

Screw coaxial is arranged in the cannulated sleeve, and the cannulated sleeve lower surface is stretched out in the screw rod lower end;

A plurality of cushion rubbers between the screw rod lower surface that drag link mechanism comprises the coaxial limiting stand that is arranged on pull bar in the screw rod, is arranged on the pull bar lower surface, be enclosed within pull bar and the limiting stand, be used to separate a plurality of spacers of a plurality of cushion rubbers, the screw rod lower surface is stretched out in the lower end of pull bar;

The external diameter of limiting stand, spacer, cushion rubber and lining internal diameter are complementary, and the external diameter of cannulated sleeve is greater than the aperture in housing aperture, and the external diameter of screw rod is greater than being pulled out the lining internal diameter and less than housing bore oral pore footpath, and are complementary with the cannulated sleeve internal diameter.

The cannulated sleeve top also is provided with and drives second nut that screw rod rotatablely moves in cannulated sleeve, and the screw rod top also is provided with and drives first nut that pull bar rotatablely moves in screw rod.

Also be provided with between screw rod and the cannulated sleeve and be used to limit limit screw and the screw slots that screw rod rotatablely moves, also be provided with between screw rod and the pull bar and be used to limit cylinder latch and the stopper slot that pull bar rotatablely moves.

Also be provided with first handle and second handle on first nut and second nut, first handle and second handle are installed on first nut and second nut with screw thread respectively.

Preferable, also being provided with packing ring between the cannulated sleeve upper surface and the second nut lower surface, the second nut upper surface and the first nut lower surface also are provided with packing ring.

Advantage of the present invention is following:

The present invention is applicable to and extracts various tubular objects, is particularly useful for institute's tube drawing shape object endoporus and is the situation at the bottom of the hole that unthreaded hole and institute's tube drawing shape object one end be forced into housing, is difficult for scratching the tubular object endoporus, and is simultaneously more laborsaving.

Description of drawings

Fig. 1 is pressed into the sketch map in the housing for lining;

Fig. 2 pulls out the structural representation of cover instrument for the present invention.

Among the figure: the 1-pull bar; The 2-spacer; The 5-screw rod; The 6-cannulated sleeve; The 7-packing ring; 8-second nut; The 9-first handle; 10-first nut; The 11-second handle; 12-cylinder latch; The 13-limit screw; The 14-cushion rubber; The 15-lining; The 16-O-ring seal; The 17-housing; The 19-limiting stand; 20-lining internal diameter; The 21-stopper slot; The 22-screw slots; 23-housing aperture.

The specific embodiment

Below in conjunction with Fig. 2 the present invention being pulled out the cover instrument details:

This pulls out the cover instrument, comprises cannulated sleeve 6, screw rod 5 and drag link mechanism;

Screw rod 5 coaxial being arranged in the cannulated sleeve 6, cannulated sleeve 6 lower surfaces are stretched out in screw rod 5 lower ends;

Drag link mechanism comprises the coaxial limiting stand 19 that is arranged on pull bar 1 in the screw rod 5, is arranged on pull bar 1 lower surface, be enclosed within a plurality of cushion rubbers 14 between screw rod 5 lower surfaces and the limiting stand 19 on the pull bar 1, be used to separate a plurality of spacers 2 of a plurality of cushion rubbers 14, and screw rod 5 lower surfaces are stretched out in the lower end of pull bar 1;

The external diameter and the lining internal diameter 20 of limiting stand 19, spacer 2, cushion rubber 14 are complementary, and the external diameter of cannulated sleeve 6 is greater than the aperture in housing aperture 23, and the external diameter of screw rod 5 is greater than the internal diameter of lining 15 and less than the aperture in housing aperture 23, and are complementary with cannulated sleeve 6 internal diameters.

Cannulated sleeve 6 tops also are provided with and drive second nut 8 that screw rod 5 rotatablely moves in cannulated sleeves 6, and screw rod 5 tops also are provided with and drive first nut 10 that pull bar 1 rotatablely moves in screw rod 5.

Also be provided with between screw rod 5 and the cannulated sleeve 6 and be used to limit the limit screw 13 and screw slots 22 that screw rod 5 rotatablely moves, also be provided with between screw rod 5 and the pull bar 1 and be used to limit the cylinder latch 12 and stopper slot 21 that pull bar 1 rotatablely moves.

Also be provided with first handle 9 and second handle 11 on first nut 10 and second nut 8, first handle 9 is installed on first nut 10 and second nut 8 with screw thread respectively with second handle 11.

Preferable, also be provided with packing ring 7, the second nuts, 8 upper surfaces between cannulated sleeve 6 upper surfaces and second nut, 8 lower surfaces and first nut, 10 lower surfaces also are provided with packing ring 7.

Below in conjunction with Fig. 1 the operation principle of the embodiment of the invention is detailed:

As shown in Figure 1, lining 15 has been pressed in housing 17 holes, in the time of pulling out lining 15; Earlier the limiting stand 19 of the cover instrument that the pulls out lower end of free state and the pull bar 1 that is with cushion rubber 14 are filled in the lining 15 from housing aperture 23, cannulated sleeve 6 lower surfaces are leaned against on housing 17 upper surfaces, pull first nut 10 through handle and turn clockwise; Thereby pulling pull bar 1 and limiting stand 19 move upward; Cushion rubber 14 is squeezed the back along the expansion of external diameter direction, tightly is crowded with at the lining endoporus, and then pulls the rotation of nut clockwise direction; Driving screw rod 5 and pull bar 1 waits all lower member to move upward; At this moment, because the frictional force of cushion rubber 14 and lining 15 endoporus is greater than the frictional force of O-ring seal on lining 15 external diameters 16 with housing 17 hole walls on the instrument, lining 15 will easily successfully be pulled out like this.

The structure of this instrument can be provided with the external diameter of limiting stand 19, spacer 2, cushion rubber 14, screw rod 5, cannulated sleeve 6 according to actual conditions, to adapt to the identical tubular object of various principles.

Claims

1. one kind is pulled out the cover instrument, it is characterized in that: comprise cannulated sleeve, screw rod and drag link mechanism; Said screw coaxial is arranged in the cannulated sleeve, the cannulated sleeve lower surface is stretched out in said screw rod lower end; Said drag link mechanism comprises the coaxial pull bar that is arranged in the screw rod; The screw rod lower surface is stretched out in the lower end of said pull bar, be arranged on the pull bar lower end limiting stand, be enclosed within pull bar screw rod lower surface and limiting stand between a plurality of cushion rubbers, be used to separate a plurality of spacers of a plurality of cushion rubbers.

2. the cover instrument that pulls out according to claim 1 is characterized in that: the cannulated sleeve top also is provided with and drives second nut that screw rod rotatablely moves in cannulated sleeve, and the screw rod top also is provided with and drives first nut that pull bar rotatablely moves in screw rod.

3. the cover instrument that pulls out according to claim 1 and 2; It is characterized in that: also be provided with between screw rod and the cannulated sleeve and be used to limit limit screw and the screw slots that screw rod rotatablely moves, also be provided with between screw rod and the pull bar and be used to limit cylinder latch and the stopper slot that pull bar rotatablely moves.

4. the cover instrument that pulls out according to claim 3 is characterized in that: also comprise first handle and second handle, first handle and second handle are installed on first nut and second nut with screw thread respectively.

5. the cover instrument that pulls out according to claim 4 is characterized in that: be provided with packing ring between the cannulated sleeve upper surface and the second nut lower surface, the second nut upper surface and the first nut lower surface also are provided with packing ring.