CN200984726Y

CN200984726Y - Blind hole bush withdrawing device

Info

Publication number: CN200984726Y
Application number: CN 200620144659
Authority: CN
Inventors: 陈忠民
Original assignee: Nanjing Jincheng Machinery Co Ltd
Current assignee: Nanjing Jincheng Machinery Co Ltd
Priority date: 2006-12-31
Filing date: 2006-12-31
Publication date: 2007-12-05
Anticipated expiration: 2016-12-31

Abstract

The utility model discloses a blind hole bush puller, comprising a shaft sleeve, a pulling lever, a pulling lever head and a handle; one side of the shaft sleeve is the pulling segment, the outer diameter of the pulling segment is slightly smaller than the inner diameter of the inner sleeve; a plurality of bar-shaped grooves with a hatch at one end are arranged along the axial direction of the pulling segment; one end of the pulling lever is screwed in the shaft sleeve; a taper shape pushing segment is arranged on the part where the pulling lever corresponds to the shaft sleeve pulling segment; the taper angle of the pushing segment is the same as the taper angle of the inner surface of the pulling segment; the pulling lever head is fixed on the protruding end of the pulling lever; the handle is arranged on the pulling lever hand. When the blind hole bush puller is in use, the pulling segment of the shaft sleeve extends into the inner hole of the bush, and then the handle is rotated; the pushing segment of the pulling lever can expand the shaft sleeve gradually to lock the shaft sleeve to the bush; meanwhile, the handle is pulled outside to pull the bush. The utility model effectively solve the difficulty that the bush in blind hole is not easy to be detached, and the utility model is of convenient operation, the workpiece and the bush is not easy to be damaged during detaching and is particularly suitable for the demand of large-scaled production.

Description

Blind hole lining puller

One, technical field

The utility model relates to a kind of frock, a kind of specifically special tooling that the lining of blind hole is pulled out of being used for.

Two, background technology

In mechanical installation process, the installation and removal of lining are a more loaded down with trivial details job, because lining and the workpiece that is mated are generally transition or interference fit, during installation, must use external force to impact or push along the lining axis is pressed into lining in the workpiece, but for dismantling then bother many, if the installation passage of lining is a through hole, then can use the copper rod symmetry to knock bush end face in through hole one side picks out it, better method is to use the diameter metal cylinder more smaller than the aperture to be against bush end face as specific purpose tool, knocks metal cylinder and makes lining withdraw from installing hole.But for installing hole is the busy hole of end sealing, and then said method is all powerless, generally can only the workpiece installing hole be expanded heated parts, manage tool using again lining is taken out, but this method both also fragile simultaneously workpiece of complexity and lining.

Three, utility model content

Technical problem to be solved in the utility model is in order to overcome the deficiencies in the prior art, a kind of easy to use and labour-saving blind hole lining puller to be provided, having improved operating efficiency greatly.

A kind of blind hole lining puller described in the utility model, it is characterized in that: it comprises axle sleeve, pull bar, drawhead, handle, one side of described axle sleeve is the drawing section, this drawing section external diameter is slightly less than the internal diameter of waiting to tear open neck bush, its inner surface is the conical surface, have the bar shaped groove of many single-ended openings along axis direction in the drawing section, one end of pull bar is located in the axle sleeve in the screwfeed mode, pull bar and axle sleeve drawing section counterpart are the section of pulling out that pushes away of band tapering, its tapering is identical with the tapering of drawing section inner surface, drawhead is fixed on the external part of pull bar, and handle then is installed on the drawhead.

During use, axle sleeve drawing section is stretched in the lining endoporus, follow turning handle, because pull bar is to be located in the axle sleeve in the screwfeed mode, turning handle can make pull bar move along axis relative to axle sleeve, when pull bar when handle end moves, pull bar pushes away the section of pulling out and can contact with axle sleeve drawing section inner surface gradually, along with the continuation of pull bar is moved, and because of the drawing section has the bar shaped groove of many single-ended openings along axis direction, pushing away the section of pulling out can be with the axle sleeve spreading, thereby makes the mutual firm locking of axle sleeve and lining, at this moment be pulled outwardly handle again, lining will be pulled out.

In order to increase the frictional force between axle sleeve and the lining, the tapering that pushes away the section of pulling out is preferably 10 degree～15 degree, contacts than the formation face that is easier between the axle sleeve of spreading and the lining like this, thereby has improved the intensity of both connections, and making can slippage in the process of drawing.

The utility model efficiently solves not quick detachable this difficult problem of lining in the blind hole, and is not only easy to use, and is difficult for infringement workpiece and lining in the unloading process, and it is particularly suitable for the needs of high volume production process.

Four, description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the left view of Fig. 1.

Five, the specific embodiment

As depicted in figs. 1 and 2, a kind of blind hole lining puller described in the utility model, it comprises axle sleeve 1, pull bar 2, drawhead 3, handle 4, one side of axle sleeve 1 is a drawing section 5, these drawing section 5 external diameters are slightly less than the internal diameter of waiting to tear open neck bush 8, its inner surface is the conical surface, have the bar shaped groove 6 of many single-ended openings along axis direction in drawing section 5, one end of pull bar 2 is located in the axle sleeve 1 in the screwfeed mode, pull bar 2 and axle sleeve drawing section 5 counterparts push away the section of pulling out 7 for the band tapering, its tapering is identical with the tapering of drawing section 5 inner surfaces, and drawhead 3 is fixed on the external part of pull bar 2, and 4 on handle is installed on the drawhead 3.The tapering that wherein pushes away the section of pulling out 7 is 10 degree～15 degree.

Claims

1, a kind of blind hole lining puller, it is characterized in that: it comprises axle sleeve (1), pull bar (2), drawhead (3), handle (4), one side of described axle sleeve (1) is drawing section (5), the external diameter of this drawing section (5) is slightly less than the internal diameter of neck bush to be torn open (8), its inner surface is the conical surface, have the bar shaped groove (6) of many single-ended openings along axis direction in drawing section (5), one end of pull bar (2) is located in the axle sleeve (1) in the screwfeed mode, pull bar (2) and axle sleeve drawing section (5) counterpart push away the section of pulling out (7) for the band tapering, its tapering is identical with the tapering of drawing section (5) inner surface, drawhead (3) is fixed on the external part of pull bar (2), and handle (4) then is installed on the drawhead (3).

2, blind hole lining puller according to claim 1 is characterized in that: the tapering that pushes away the section of pulling out (7) is 10 degree～15 degree.