CN113664298A

CN113664298A - Countersunk rivet hole chamfering adjuster

Info

Publication number: CN113664298A
Application number: CN202110930738.8A
Authority: CN
Inventors: 李克坤; 闫文森; 左亚军
Original assignee: Beijing Worldia Diamond Tools Co ltd
Current assignee: Beijing Worldia Diamond Tools Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-11-19

Abstract

The utility model relates to a countersunk head rivet hole chamfer regulator, including the axle casket, one end is pegged graft in the axle box axle sleeve and coaxial setting in the axle sleeve and with axle sleeve normal running fit's dabber, the axle sleeve with the axle casket along the axis direction of dabber cooperation of sliding, be provided with between axle sleeve and axle casket and be used for carrying out the locating part that limits to the axle sleeve distance of sliding. This application has the wearing and tearing that reduce the dabber, reduces the fit clearance of dabber and axle sleeve, and then rocking of pistol drill when reducing the chamfer, guarantees the unanimous advantage of chamfer size.

Description

Countersunk rivet hole chamfering adjuster

Technical Field

The application relates to the field of machining equipment, in particular to a countersunk head rivet hole chamfering adjuster.

Background

At present, most of outer cover skins of wings and passenger cabins of airplanes are made of carbon fiber composite materials, parts are connected through rivets, and an orifice of each rivet hole needs to be chamfered. When chamfering the rivet mouth, the chamfer needs to be adjusted for different apertures, different angles and different depths.

In the correlation technique, generally use the pistol drill to carry out the chamfer to the rivet hole, install the chamfer sword on the pistol drill, the staff holds in the palm the pistol drill and carries out the chamfer, in order to facilitate adjusting the size of chamfer, generally can install the concave drill bushing of ream between pistol drill and chamfer sword, the concave drill bushing of ream mainly includes the axle sleeve and sets up the dabber in the axle sleeve, the dabber just can slide along the axis direction in the axle sleeve with axle sleeve normal running fit, dabber one end is connected with the pistol drill, the other end is connected with the chamfer sword, be provided with the positioning mechanism who is used for fixing a position the dabber distance of sliding between dabber and axle sleeve. During chamfering, the sliding distance of the mandrel is adjusted through the positioning mechanism, the pistol drill is pushed towards the direction of the rivet hole, and the size of the chamfer size is adjusted by the sliding of the mandrel and the shaft sleeve.

With respect to the related art in the above, the inventors consider that: when the chamfer, the dabber had not only rotated, still axial slip, long-time the use can lead to the dabber wearing and tearing, the fit clearance grow of dabber and axle sleeve to lead to adding the grow of beating of dabber man-hour, the pistol drill rocks, and the chamfer size is inhomogeneous.

Disclosure of Invention

In order to reduce the wearing and tearing of dabber, reduce the fit clearance of dabber and axle sleeve, and then rocking of pistol drill when reducing the chamfer, guarantee the unanimity of chamfer size, this application provides a countersunk head rivet hole chamfer regulator.

The application provides a pair of countersunk head rivet hole chamfer regulator adopts following technical scheme:

the utility model provides a countersunk rivet hole chamfer regulator, includes the axle casket, one end peg graft in the axle sleeve of axle casket and coaxial setting in the axle sleeve and with axle sleeve normal running fit's dabber, the axle sleeve slides along the axis direction of dabber with the axle casket and cooperates, is provided with the locating part that is used for carrying out the restriction to the axle sleeve distance of sliding between axle sleeve and axle casket.

Through adopting above-mentioned technical scheme, when carrying out the chamfer to the rivet hole, at first be connected the dabber back of the body off-axis casket's one end with the pistol drill, then install the chamfer sword and serve near one of axle casket, then adjust the locating part, according to the different apertures of chamfer, the sliding distance of the demand sliding sleeve of different angles and the different degree of depth limits, staff's hand holds in the palm the pistol drill and carries out the chamfer to the rivet hole, carry out the butt with terminal surface and the work piece that axle sleeve one end was kept away from to the axle casket, then open the pistol drill and drive the dabber and drive the chamfer sword and rotate, promote the pistol drill towards the direction in rivet hole, the axle sleeve slides towards the direction of chamfer in the axle casket, thereby the dabber slides along with the axle sleeve towards rivet hole direction and carries out the chamfer to the rivet hole. To sum up, through setting up axle sleeve, axle casket and dabber, can make the circular motion of dabber and the reciprocating motion of axle sleeve separately design to effectively reduced because of the influence that dabber wearing and tearing led to the fact dabber and axle sleeve fit clearance, and then rocking of pistol drill when reducing the chamfer has guaranteed the unanimity of chamfer size.

Optionally, a first bearing is coaxially fixed on one side of the shaft sleeve close to the shaft box, a second bearing is coaxially fixed on one side of the shaft sleeve far away from the shaft box, the first bearing and the second bearing are deep groove ball bearings, and the mandrel is fixedly connected with inner rings of the first bearing and the second bearing.

Through adopting above-mentioned technical scheme, first bearing and second bearing can bear radial load, and coefficient of friction is very little, and limit speed is also very high to frictional resistance when can effectively reducing the dabber and rotate reduces the wearing and tearing of dabber, improves dabber pivoted smoothness degree.

Optionally, lie in the coaxial third bearing that is fixed with in the axle sleeve that deviates from one side of first bearing of second bearing, the third bearing is terminal surface footstep bearing the coaxial clamping ring that is provided with on the dabber, the outer lane butt of clamping ring and third bearing.

Through adopting above-mentioned technical scheme, when the direction towards the rivet hole is to the dabber application of force, the pressing ring can be applyed thrust to the third bearing on, the third bearing can bear great axial load to reduce the burden of dabber and first bearing and second bearing cooperation department, mutually support through third bearing and first bearing and second bearing, can furthest reduce the runout of dabber, thereby further reduce the wearing and tearing of dabber, reduce the fit clearance of dabber and axle sleeve.

Optionally, a gasket is arranged between the second bearing and the third bearing in a padding mode, and two ends of the gasket are respectively abutted to outer rings of the second bearing and the third bearing.

Through adopting above-mentioned technical scheme, direct contact between can avoiding second bearing and the third bearing to play the guard action to second bearing and third bearing.

Optionally, the limiting part comprises a limiting sleeve sleeved on the shaft sleeve, the limiting sleeve and the shaft sleeve are in sliding fit along the axis direction of the mandrel, and a limiting ring used for adjusting the distance between the limiting sleeve and the shaft box is screwed on one side, far away from the shaft box, of the limiting sleeve on the shaft sleeve.

By adopting the technical scheme, the limiting ring is screwed to push the limiting sleeve to slide on the shaft sleeve, so that the distance between the limiting sleeve and the shaft box is changed, and the sliding distance of the shaft sleeve is adjusted. Through setting up spacing sleeve and spacing ring, improve the convenience of the adjustment of the axle sleeve displacement.

Optionally, a mounting sleeve is coaxially arranged at one end, close to the shaft sleeve, of the shaft box, the limiting sleeve is inserted into the mounting sleeve and is in sliding fit with the mounting sleeve, the limiting part further comprises a retaining ring protruding from the outer wall of the limiting sleeve, and the outer diameter of the retaining ring is larger than that of the mounting sleeve.

Through adopting above-mentioned technical scheme, through revolving the twist spacing ring, the spacing ring promotes spacing sleeve and slides on the axle sleeve, thereby change the distance between fender ring and the installation sleeve, when promoting the dabber, the axle sleeve drives spacing sleeve and slides towards the direction of rivet hole, keep off the ring and slide towards the installation sleeve direction, when the axle sleeve slides to extreme position, thereby keep off ring and the terminal surface butt of installation sleeve and restrict the distance of sliding of axle sleeve, the installation sleeve can guide spacing sleeve's sliding, improve the stability and the smoothness degree that spacing sleeve slided.

Optionally, the position-limiting member further includes a spring for driving the position-limiting sleeve to slide in a direction away from the shaft box.

Through adopting above-mentioned technical scheme, when carrying out the chamfer to the rivet hole, promote the direction of dabber towards the rivet hole, the axle sleeve drives the direction of spacing sleeve towards the rivet hole and slides, keep off the ring and slide towards the installation sleeve direction, the elasticity of spring is opposite with the direction of sliding of axle sleeve, when the axle sleeve cunning shifts to extreme position, thereby keep off ring and installation sleeve's terminal surface butt and restrict the distance of sliding of axle sleeve, the back is accomplished to the chamfer, make axle casket and work piece separation, the direction that the axle box orientation deviates from the axle sleeve slides under the effect of spring, make the axle sleeve reset, improve the convenience of chamfer.

Optionally, the inner diameter of the mounting sleeve is larger than that of the shaft box, the spring is arranged in the mounting sleeve and sleeved on the shaft box, two ends of the spring are respectively abutted to the end face of the limiting sleeve and the end face of the shaft box, and the spring is always in a compression state.

By adopting the technical scheme, when the mandrel is pushed towards the rivet hole, the shaft sleeve drives the limiting sleeve to slide towards the rivet hole, the baffle ring slides towards the mounting sleeve, and the spring contracts under the common extrusion of the end surface of the limiting sleeve and the end surface of the shaft box; after the chamfer was accomplished, the spring promoted the axle casket orientation and deviates from the direction of axle sleeve and slides to make the axle sleeve reset, the axle sleeve can restrict and guide the flexible stability and the smoothness degree of spring to the spring.

Optionally, the limiting part further comprises an indexing disc coaxially arranged at one end, far away from the shaft box, of the limiting sleeve, a tooth socket is arranged at one end, far away from the limiting sleeve, of the indexing disc, the tooth socket is provided with a plurality of teeth which are arranged in a circumferential mode by taking the axis of the indexing disc as the center, a plurality of teeth are arranged in a protruding mode at one end, facing the indexing disc, of the limiting ring, the teeth are arranged in a circumferential mode by taking the axis of the limiting ring as the center, and the teeth are meshed with the tooth socket.

By adopting the technical scheme, the tooth sockets on the dividing plate can equally divide the thread pitch of the limiting ring, when the sliding distance of the shaft sleeve is adjusted, the limiting ring is rotated, the tooth drives the dividing plate to rotate for a circle when the limiting ring rotates for one circle, and when the tooth rotates for one angle, the moving distance of the limiting ring is the thread pitch of the limiting ring divided by the number of the teeth; through the mutual cooperation of tooth and tooth's socket, can the regulation stroke scope of accurate control axle sleeve, and then the size of accurate control chamfer.

Optionally, a limiting groove is formed in the outer wall of the shaft sleeve along the sliding direction of the shaft sleeve, a first limiting hole is formed in the shaft box, a second limiting hole is formed in the limiting sleeve, jackscrews are arranged in the first limiting hole and the second limiting hole, and the end portion of each jackscrew is located in the limiting groove and matched with the limiting groove in a sliding mode.

Through adopting above-mentioned technical scheme, the jackscrew can restrict and guide axle sleeve and spacing sleeve's slip, and axle sleeve and spacing sleeve only can slide and can not circumferential direction along the axis direction of dabber to improve the stability and the smoothness degree that axle sleeve and spacing sleeve slided.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the shaft sleeve, the shaft box and the mandrel, the circular motion of the mandrel and the reciprocating motion of the shaft sleeve can be separately designed, so that the influence on the fit clearance between the mandrel and the shaft sleeve caused by the abrasion of the mandrel is effectively reduced, the shaking of a pistol drill during chamfering is further reduced, and the consistency of the size of the chamfer is ensured;

2. by arranging the first bearing and the second bearing, the friction resistance of the mandrel during rotation can be effectively reduced, the abrasion of the mandrel is reduced, and the smoothness of the rotation of the mandrel is improved;

3. the third bearing is matched with the first bearing and the second bearing, so that the radial runout of the mandrel can be reduced to the maximum extent, the abrasion of the mandrel is further reduced, and the fit clearance between the mandrel and the shaft sleeve is reduced;

4. the convenience of adjusting the sliding distance of the shaft sleeve is improved by arranging the limiting sleeve and the limiting ring;

5. by arranging the spring, after chamfering is finished, the shaft box can be pushed to slide towards the direction deviating from the shaft sleeve, so that the shaft sleeve is reset, and the convenience of chamfering is improved;

6. through the mutual cooperation of tooth and tooth's socket, can the regulation stroke scope of accurate control axle sleeve, and then the size of accurate control chamfer.

Drawings

FIG. 1 is a schematic structural view of a countersunk rivet hole chamfer adjuster in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a countersunk rivet hole chamfer adjuster in an embodiment of the present application;

fig. 3 is a schematic structural diagram of the shaft sleeve and the shaft box matched in the embodiment of the application.

Description of reference numerals: 1. a shaft cartridge; 10. air holes are formed; 11. installing a sleeve; 12. a first limit hole; 2. a shaft sleeve; 20. a first card slot; 22. a first end cap; 23. a second card slot; 24. a second end cap; 25. a limiting groove; 3. a mandrel; 30. mounting holes; 31. pressing a ring; 4. a limiting member; 40. a limiting sleeve; 400. fixing the sleeve; 401. a second limiting hole; 41. a spring; 42. a baffle ring; 43. an index plate; 430. a tooth socket; 44. a limiting ring; 440. teeth; 5. a first bearing; 6. a second bearing; 7. a third bearing; 8. a gasket; 9. and (5) jacking the screw.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses countersunk head rivet hole chamfer regulator. Referring to fig. 1 and 2, the countersunk head rivet hole chamfer adjuster includes a shaft box 1, a shaft sleeve 2 with one end inserted into the shaft box 1, and a mandrel 3 coaxially disposed in the shaft sleeve 2 and rotationally engaged with the shaft sleeve 2, wherein the shaft sleeve 2 is slidably engaged with the shaft box 1 along the axial direction of the mandrel 3, and a limiting member 4 for limiting the sliding distance of the shaft sleeve 2 is disposed between the shaft sleeve 2 and the shaft box 1.

Referring to fig. 1 and 2, the shaft box 1 is hollow and has openings at two ends, an air hole 10 is formed in the outer wall of the shaft box 1 at the side far away from the shaft sleeve 2, the air hole 10 is a waist-shaped hole and penetrates through two opposite sides of the shaft box 1 along the radial direction, and the air hole 10 can play a role in removing chips and dissipating heat; the end surface of one end of the shaft box 1, which is far away from the shaft sleeve 2, is a plane, so that the shaft box 1 is convenient to abut against and match with a workpiece; the core shaft 3 penetrates through the shaft sleeve 2, two ends of the core shaft are positioned outside the shaft sleeve 2, and a mounting hole 30 is formed in the end face, facing one end of the shaft box 1, of the core shaft 3, so that the chamfer cutter can be mounted conveniently, and the specific mounting hole 30 can be a threaded hole; the cross-section of the part of the mandrel 3 remote from the magazine 1 is polygonal, so as to facilitate the connection of the mandrel 3 to a pistol drill.

In order to improve the smoothness and stability of the rotation of the mandrel 3, the shaft sleeve 2 is hollow, openings are formed in two ends of the shaft sleeve, a first bearing 5 is coaxially fixed on one side, close to the shaft box 1, in the shaft sleeve 2, a second bearing 6 is coaxially fixed on one side, far away from the shaft box 1, of the shaft sleeve 2, the first bearing 5 and the second bearing 6 are deep groove ball bearings, the mandrel 3 is fixedly connected with inner rings of the first bearing 5 and the second bearing 6, and the mandrel can be fixed in an interference fit mode; in order to facilitate the installation of the first bearing 5 and the second bearing 6, an annular first clamping groove 20 is formed in the inner wall of the shaft sleeve 2 corresponding to the first bearing 5, the end surface of the outer ring of the first bearing 5 is abutted to the end wall of the first clamping groove 20, a first end cover 22 is screwed to an opening of the shaft sleeve 2 close to one end of the shaft box 1, and the first end cover 22 is abutted to the end surface of the outer ring of the first bearing 5, so that the first bearing 5 is kept stable; in order to further improve the stability of the rotation of the spindle 3, two bearing locking nuts are coaxially and fixedly connected to the spindle 3 on the side close to the first end cap 22, and the bearing locking nuts abut against the inner ring of the first bearing 5.

An annular second clamping groove 23 is formed in the inner wall of the shaft sleeve 2 corresponding to the second bearing 6, the inner wall of the outer ring of the second bearing 6 is abutted to the end wall of the second clamping groove 23, and a second end cover 24 is screwed on an opening, far away from one end of the shaft sleeve 1, of the shaft sleeve 2, so that the position of the second bearing 6 is limited.

When applying force to the mandrel 3, in order to reduce the burden of the matching position of the mandrel 3 with the first bearing 5 and the second bearing 6, a third bearing 7 is coaxially fixed between the second bearing 6 and the second end cover 24 in the shaft sleeve 2, the third bearing 7 is an end surface thrust bearing, the mandrel 3 is coaxially fixedly connected with the inner ring of the third bearing 7, and specifically, the fixing can be performed in an interference fit manner, a pressing ring 31 is coaxially arranged between the third bearing 7 and the second end cover 24 on the mandrel 3, the pressing ring 31 is integrally cast with the mandrel 3, the pressing ring 31 is abutted against the end surface of the outer ring of the third bearing 7, in order to reduce the damage of the third bearing 7 to the second bearing 6, a gasket 8 is arranged between the second bearing 6 and the third bearing 7, and two ends of the gasket 8 are respectively abutted against the outer rings of the second bearing 6 and the third bearing 7.

Referring to fig. 2 and 3, a mounting sleeve 11 is coaxially arranged at one end of the shaft box 1 close to the shaft sleeve 2, and the inner diameter of the mounting sleeve 11 is larger than that of the shaft box 1 and is integrally cast with the shaft box 1; the limiting part 4 comprises a limiting sleeve 40, a spring 41, a baffle ring 42, an indexing disc 43 and a limiting ring 44; the limiting sleeve 40 is sleeved on the periphery of the shaft sleeve 2 and is in sliding fit with the shaft sleeve 2, the outer diameter of the limiting sleeve 40 is matched with the inner diameter of the mounting sleeve 11, one end, facing the shaft box 1, of the limiting sleeve 40 is inserted into the mounting sleeve 11 and is in sliding fit with the mounting sleeve 11, a fixing sleeve 400 is coaxially arranged at one end, located in the mounting sleeve 11, of the limiting sleeve 40, the fixing sleeve 400 and the limiting sleeve 40 are integrally cast and formed, and the outer diameter of the fixing sleeve 400 is smaller than that of the limiting sleeve 40; the spring 41 is positioned in the mounting sleeve 11 and sleeved on the shaft sleeve 2, one end of the spring 41 is fixedly connected with the fixing sleeve 400, and the other end of the spring is abutted against the end face of the shaft box 1; the baffle ring 42 is positioned outside the mounting sleeve 11 and coaxially arranged on the outer wall of the limiting sleeve 40, and the outer diameter of the baffle ring 42 is larger than the inner diameter of the mounting sleeve 11; the dividing disc 43 is coaxially arranged at one end of the limiting sleeve 40 far away from the mounting sleeve 11, the dividing disc 43 and the limiting sleeve 40 are integrally cast, a tooth groove 430 is formed at one end of the dividing disc 43 far away from the limiting sleeve 40, and a plurality of tooth grooves 430 are circumferentially arranged by taking the axis of the dividing disc 43 as the center; the limit ring 44 is screwed on the shaft sleeve 2, a plurality of teeth 440 are arranged at one end of the limit ring 44 facing the dividing plate 43 in a protruding manner, the teeth 440 are circumferentially arranged by taking the axis of the limit ring 44 as the center, and the teeth 440 are meshed with the tooth grooves 430. The screw pitch that can adjust spacing ring 44 according to actual demand and the figure of tooth's socket 430 to adjust the precision of the distance of sliding of spacing sleeve 40, and then adjust the precision of chamfer size, in this embodiment, the screw thread pitch of spacing ring 44 is 0.8mm, and tooth's socket 430 has 32, and every angle of rotating a tooth's socket 430 of spacing ring 44, the distance of sliding of axle sleeve 2 is 0.025mm, and then the regulation precision of chamfer size is 0.025 mm.

Referring to fig. 2 and 3, in order to limit and guide the sliding of the shaft sleeve 2 and the limiting sleeve 40, a limiting groove 25 is formed in the outer wall of the shaft sleeve 2 along the sliding direction of the shaft sleeve 2, a first limiting hole 12 is formed in the periphery of the shaft sleeve 1 corresponding to the limiting groove 25, a second limiting hole 401 is formed in the periphery of the limiting sleeve 40 corresponding to the limiting groove 25, the first limiting hole 12 and the second limiting hole 401 are threaded holes, a jackscrew 9 is screwed in the first limiting hole 12 and the second limiting hole 401, the end of the jackscrew 9 is located in the limiting groove 25 and is in sliding fit with the limiting groove 25, so that the shaft sleeve 2 and the limiting sleeve 40 are prevented from rotating when sliding, and the sliding distance between the shaft sleeve 2 and the limiting sleeve 40 is limited. In order to further improve the convenience of installation of the chamfering tool, the air holes 10 are located on an extension line of the limiting groove 25, after the shaft sleeve 2 slides to a set position towards the shaft box 1, the limiting groove 25 corresponds to the air holes 10, then pins can be inserted into the limiting groove 25, and under the action of the spring 41, the pins are abutted against the inner wall of the air holes, so that the position of the shaft sleeve 2 is limited, and the chamfering tool is convenient to install.

The implementation principle of the countersunk head rivet hole chamfering regulator in the embodiment of the application is as follows: when chamfering the rivet hole, firstly connecting one end of the mandrel 3, which is away from the shaft box 1, with a pistol drill, then screwing the chamfering tool into the mounting hole 30 of the mandrel 3, according to the requirements of chamfering different hole diameters, different angles and different depths, rotating the limiting ring 44, because the teeth 440 on the limiting ring 44 and the tooth socket 430 on the dividing disc 43 are meshed with each other, the dividing disc 43 rotates along with the limiting ring 44 while rotating the limiting ring 44, the thread pitch of the limiting ring 44 is 0.8mm, the number of the tooth sockets 430 is 32, and when the limiting ring 44 rotates by the angle of one tooth socket 430, the limiting ring 44 pushes the baffle ring 42 to slide by 0.025mm towards or away from the direction of the mounting sleeve 11, so that the sliding distance of the shaft sleeve 2 can be accurately adjusted.

After the regulation is accomplished, staff's hand support pistol drill carries out the chamfer to the rivet hole, carry out the butt with terminal surface and the work piece that axle casket 1 kept away from 2 one ends of axle sleeve, then open pistol drill drive dabber 3 and drive the chamfer sword and rotate, the first bearing 5 of mutually supporting, second bearing 6 and third bearing 7 both can reduce the 3 frictional force that receive that rotate of dabber, improve 3 pivoted fluency degrees of dabber, can also furthest reduce the runout of dabber 3, thereby further reduce the wearing and tearing of dabber 3, reduce the fit clearance of dabber 3 and axle sleeve 2.

The direction towards the rivet hole promotes the pistol drill, axle sleeve 2 drives the direction of spacing sleeve 40 towards the rivet hole and slides, spacing sleeve 40 drives and keeps off ring 42 and slides towards installation sleeve 11 direction, under the restriction of jackscrew 9 and guide, axle sleeve 2 and spacing sleeve 40 can only slide and can not circumferential direction along the axis direction of dabber 3, under the common extrusion of spacing sleeve 40 terminal surface and axle casket 1 terminal surface, spring 41 contracts, behind the axle sleeve 2 motion to established distance, thereby keep off ring 42 and installation sleeve 11's terminal surface butt and restrict the distance of sliding of axle sleeve 2, thereby control the diameter of chamfer, angle and degree of depth. After the chamfering is finished, the shaft box 1 is separated from the workpiece, and the shaft box 1 is pushed to slide towards the direction departing from the shaft sleeve 2 under the action of the spring 41, so that the shaft sleeve 2 is reset, and the next chamfering operation is convenient to perform. To sum up, through setting up axle sleeve 2, axle casket 1 and dabber 3, can make the circular motion of dabber 3 and the reciprocating motion of axle sleeve 2 separately design to effectively reduced because of the influence that dabber 3 wearing and tearing led to the fact dabber 3 and 2 fit clearance of axle sleeve, and then rocking of pistol drill when reducing the chamfer, guaranteed the unanimity of chamfer size.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a countersunk head rivet hole chamfer regulator which characterized in that: including axle casket (1), axle sleeve (2) and coaxial arrangement in axle sleeve (2) and with axle sleeve (2) normal running fit's dabber (3) in axle sleeve (1) are pegged graft to one end, and axle sleeve (2) and axle casket (1) slide along the axis direction of dabber (3) and cooperate, are provided with between axle sleeve (2) and axle casket (1) and are used for carrying out locating part (4) that restrict to axle sleeve (2) distance of sliding.

2. A countersunk rivet hole chamfer adjuster according to claim 1, wherein: the bearing is characterized in that a first bearing (5) is coaxially fixed on one side, close to the shaft box (1), in the shaft sleeve (2), a second bearing (6) is coaxially fixed on one side, far away from the shaft box (1), of the shaft sleeve (2), the first bearing (5) and the second bearing (6) are deep groove ball bearings, and the mandrel (3) is fixedly connected with inner rings of the first bearing (5) and the second bearing (6).

3. A countersunk rivet hole chamfer adjuster according to claim 2, wherein: lie in one side coaxial fixation that second bearing (6) deviates from first bearing (5) in axle sleeve (2) and have third bearing (7), third bearing (7) are end face thrust bearing coaxial be provided with clamping ring (31) on dabber (3), clamping ring (31) and the outer lane butt of third bearing (7).

4. A countersunk rivet hole chamfer adjuster according to claim 3, wherein: and a gasket (8) is arranged between the second bearing (6) and the third bearing (7) in a cushioning manner, and two ends of the gasket (8) are respectively abutted against the outer rings of the second bearing (6) and the third bearing (7).

5. A countersunk rivet hole chamfer adjuster according to claim 3, wherein: locating part (4) are including the spacing sleeve (40) of cover on locating axle sleeve (2), spacing sleeve (40) and axle sleeve (2) along the axis direction of dabber (3) the cooperation of sliding one side spiro union that lies in spacing sleeve (40) on axle sleeve (2) and keep away from axle casket (1) has spacing ring (44) that are used for carrying out the regulation to distance between spacing sleeve (40) and axle casket (1).

6. A countersunk rivet hole chamfer adjuster according to claim 5, wherein: the shaft box (1) is close to one end of the shaft sleeve (2) and is coaxially provided with a mounting sleeve (11), the limiting sleeve (40) is inserted into the mounting sleeve (11) and is in sliding fit with the mounting sleeve (11), the limiting part (4) further comprises a retaining ring (42) which is convexly arranged on the outer wall of the limiting sleeve (40), and the outer diameter of the retaining ring (42) is larger than that of the mounting sleeve (11).

7. A countersunk rivet hole chamfer adjuster according to claim 6, wherein: the limiting piece (4) further comprises a spring (41) used for driving the limiting sleeve (40) to slide towards the direction departing from the shaft box (1).

8. A countersunk rivet hole chamfer adjuster according to claim 7, wherein: the inner diameter of installation sleeve (11) is greater than the inner diameter of axle casket (1), spring (41) set up in installation sleeve (11) and the cover is located on axle sleeve (2), the both ends of spring (41) respectively with the terminal surface of spacing sleeve (40) and the terminal surface butt of axle casket (1), spring (41) are in compression state all the time.

9. A countersunk rivet hole chamfer adjuster according to claim 5, wherein: the limiting piece (4) further comprises an indexing disc (43) which is coaxially arranged at one end, far away from the shaft box (1), of the limiting sleeve (40), a tooth groove (430) is formed in one end, far away from the limiting sleeve (40), of the indexing disc (43), the tooth grooves (430) are arranged in a circle mode by taking the axis of the indexing disc (43) as the center, a plurality of teeth (440) are arranged at one end, facing the indexing disc (43), of the limiting ring (44) in a protruding mode, the teeth (440) are arranged in a circle mode by taking the axis of the limiting ring (44) as the center, and the teeth (440) are meshed with the tooth grooves (430).

10. A countersunk rivet hole chamfer adjuster according to claim 5, wherein: be provided with spacing groove (25) along the slip direction of axle sleeve (2) on the outer wall of axle sleeve (2) be provided with first spacing hole (12) on axle casket (1) be provided with second spacing hole (401) on spacing sleeve (40) be provided with jackscrew (9) in first spacing hole (12) and the spacing hole of second (401), jackscrew (9) tip is located spacing groove (25) and slides the cooperation with spacing groove (25).