CN2524885Y

CN2524885Y - Bolt dismantling device

Info

Publication number: CN2524885Y
Application number: CN 02209973
Authority: CN
Inventors: 李伟杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-29
Filing date: 2002-01-29
Publication date: 2002-12-11
Anticipated expiration: 2012-01-29

Abstract

The utility model discloses a bolt dismantling device, which comprises a sleeve casing connected with a square shaft of a pneumatic wrench. Wherein, an inner circumference of the sleeve casing is provided with a split-type spline shaft by a spline groove. Two ends of the spline shaft are respectively provided with an upper locking sleeve and a lower locking sleeve. Thread corresponding to a bolt thread is arranged on a part above a knife withdrawal groove positioned on the inner circumference of the spline shaft. Radius of a chamber positioned at a lower end of the knife withdrawal groove is same as that of a circular corner positioned at a tail of the bolt. Collision beads uniformly distributed on the inner circumference of the lower locking sleeve is clamped inside a ring groove positioned at the lower end of the spline shaft.

Description

The Bolt dismantling device

Technical field

The utility model relates to a kind of removal tool special, the provision for disengagement of the end threaded shank that particularly a kind of and pneumatic impact spanner is used.It mainly is applicable to the dismounting of large-scale stud.

Background technology

At present, fixedly connected the large-scale stud of general employing between heavy duty equipment body and the support, the bolt screw terminal is tightened in the screwed hole that is fixed on support, needs to take out large-scale stud during maintenance of equipment in the screwed hole of support and check.So that change underproof bolt at any time.The method of dismounting, what great majority used is that manual Chain wrench or sledgehammer manually knock, though this method is time-consuming, effort, can take out bolt, and bolt is had very big damage.The former makes shank of bolt reducing end rein in out very dark ditch, and this place easily produces stress and concentrates, and influences its serviceability; The latter makes screw thread distortion of bolt upper end and shank of bolt axial bending, causes stud not reuse again, thereby scraps, and causes economic loss.In addition, the artificial unloading has also wasted the time greatly, financial resources, not only increases labour intensity, and operating efficiency is very low.

Summary of the invention

The purpose of this utility model provides a kind of Bolt dismantling machine of special use, it not only can overcome the shortcoming of the damage bolt that exists in the prior art, and it is simple in structure, easy to operate, dismounting speed is fast, does not damage bolt, effectively avoid economic loss, reduce labor intensity, increase work efficiency, shorten maintenance duration.

The purpose of this utility model is achieved in that this device comprises the sleeve pipe that the square shaft with pneumatic impact spanner joins, week is assembled with the dissection type splined shaft by spline in its middle sleeve, the splined shaft two ends have last lock sleeve and following lock sleeve respectively, all escapes have the screw thread that matches with bolt thread in the splined shaft with top, the chamfer radius of escape lower end is identical with the radius of corner of bolt spiral shell tail, is evenly distributed on down the bumping in the annular slot that pearl is connected to the splined shaft lower end of week in the lock sleeve.

The above-mentioned pearl that bumps that is evenly distributed on down week in the lock sleeve utilizes spring and shutoff to carry out axial restraint.

Because the utility model matches with the dissection type splined shaft by spline with the sleeve pipe that the square shaft of pneumatic impact spanner joins, utilize the screw thread in week in the splined shaft and the version that bolt thread matches, make splined shaft hold the end of thread on the bolt tightly, so when starting the pneumatic impact spanner demounting bolt, can not damage the screw thread of bolt, effectively avoid economic loss.In addition, utilize the fastening dissection type splined shaft of upper and lower lock sleeve, not only simple in structure, charge and discharge operations convenience, and because of the chamfer radius of its escape lower end identical with the radius of corner of bolt spiral shell tail, also can be when it holds bolt thread tightly, by closely cooperating of this chamfering and spiral shell tail fillet, play very important soft anti-sticking effect, help the bolt screw terminal being screwed out in the equipment screwed hole intactly.With whole studs of a main equipment of artificial method for dismounting dismounting, approximately needed for six personal 4-6 working day, scrap as whole bolts and can cause several thousand yuan economic loss; And, only needed get final product for two personal working days with the whole bolts of this device dismounting, and to compare with manual method, its dismounting speed is fast, does not damage bolt, can effectively avoid economic loss, reduces labor intensity, and increases work efficiency, and shortens maintenance duration.Therefore, the utility model is very easily applied.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a kind of concrete structure schematic diagram of the present utility model.

Fig. 2 is the cutaway view of Fig. 1 along the A-A line.

Fig. 3 is the vertical view of Fig. 1.

The specific embodiment

Describe concrete structure of the present utility model in detail according to Fig. 1-3.This device comprises the sleeve pipe 1 that joins with the square shaft of pneumatic impact spanner (drawing among the figure) and assembles parts such as dissection type splined shaft 3 in it.Week be processed with spline in its middle sleeve 1, the square hole that the square shaft of week setting and pneumatic impact spanner joins in the neck of upper end.The spline that is distributed on dissection type splined shaft 3 peripheries is corresponding with the spline in week in the sleeve pipe 1, utilizes the splined transmission, both can reduce the radially tension of 3 pairs of sleeve pipes 1 of splined shaft, can make it stressed even again in power transmission process, improves the stress of sleeve pipe 1.All escapes 4 are processed with the screw thread that matches with bolt thread with top in the splined shaft 3, and the chamfer radius of escape 4 lower ends is identical with the radius of corner of bolt spiral shell tail.For easy to loading and unloading, assemble lock sleeve 2 and following lock sleeve 5 respectively at splined shaft 3 upper/lower terminals, so that after the split surface close apposition of splined shaft 3, make the screw thread in week in it firmly hold the bolt thread section tightly, meanwhile, the fillet of the chamfering of escape 4 lower ends and bolt spiral shell tail is close to blocks, the bolt that is beneficial to unscrew moves axially.Fall lock sleeve 5 for preventing from the pneumatic impact spanner course of work, to shake, in following lock sleeve 5, evenly distribute in week and bump pearl 7, and it is connected in the annular slot of splined shaft 3 lower ends.The pearl 7 that bumps in week utilizes spring 8 and shutoff 6 to carry out axial restraint in the following lock sleeve 5.The specification of above-mentioned each parts, spline-shaped and corresponding assembly relation thereof should be determined according to actual instructions for use.

During use, with the thread segment that matches with bolt thread in week in the dissection type splined shaft 3 to being combined in the bolt thread place that needs dismounting, and the chamfering of its escape 4 lower ends and the fillet of bolt spiral shell tail are close to, be set with lock sleeve 2 and following lock sleeve 5 at splined shaft 3 upper/lower terminals, assemble pipe box 1 then, do power with pneumatic impact spanner, drive sleeve 1 drives splined shaft 3 and rotates gradually, and the bolt screw terminal is taken out in the screwed hole of support intactly.

Claims

1, a kind of Bolt dismantling device, comprise the sleeve pipe that the square shaft with pneumatic impact spanner joins, it is characterized in that week is assembled with the dissection type splined shaft by spline in the sleeve pipe, the splined shaft two ends have last lock sleeve and following lock sleeve respectively, all escapes have the screw thread that matches with bolt thread in the splined shaft with top, the chamfer radius of escape lower end is identical with the radius of corner of bolt spiral shell tail, is evenly distributed on down the bumping in the annular slot that pearl is connected to the splined shaft lower end of week in the lock sleeve.

2, Bolt dismantling device according to claim 1, base is characterized in that the pearl that bumps that is evenly distributed on down week in the lock sleeve utilizes spring and shutoff to carry out axial restraint.