CN208991793U - A kind of self centring mandrel - Google Patents

Abstract

A kind of self centring mandrel of the utility model, belong to a kind of technical field of mechanical fastening device, including mandrel, crushing block and axle sleeve, the cavity that cross-sectional area is gradually reduced by one end to the other end of axle sleeve is offered in axle sleeve, mandrel is arranged through axle sleeve, one end of mandrel is located in cavity, the other end is provided with baffle, baffle is fixedly connected with axle sleeve, crushing block is located in cavity, crushing block is set on mandrel and the internal perisporium of periphery wall and cavity contradicts, the pusher shoe for pushing crushing block mobile is provided in cavity, when use, axle sleeve is entered in the hole on part, so that pusher shoe pushes crushing block, it is mobile to the lesser one end of cavity cross section product, the internal perisporium of axle sleeve will will receive the extruding from crushing block at this time, axle sleeve will spreading, to be positioned to part, part is turned with the rotation of self centring mandrel It moves, processed；It solves and beats part by tools such as hammers, it is more troublesome and the problem of damage may be caused to part.

Description

A kind of self centring mandrel

Technical field

The utility model relates to a kind of technical fields of mechanical fastening device, more particularly, to a kind of self centring mandrel.

Background technique

At present in machinery field, usually used positioning core axle be by process hole precision and axis precision come determine part or The positioning accuracy of fixture, that is, the smaller positioning accuracy of fit clearance are higher.

In the prior art, it needs before processing part, needs first to make solid shaft according to the specification in the hole of part, so that solid core The shaft diameter of axis is slightly larger than the bore dia of part, so that solid shaft is matched with part interference when in the hole of solid shaft insertion part It closes, such part will be fixed more firm；Then when needing retaining element to process to part, first by solid core The hole of the end alignment part of axis, then beats part using tools such as hammers, so that in solid shaft insertion part, it is real at this time Gap between mandrel and part is smaller, part is rotated with the rotation of solid shaft, to complete to process.

Prior art among the above, which has the following deficiencies:, beats part by tools such as hammers, not only troublesome and can Part be able to can be caused to damage.

Utility model content

The purpose of the utility model is to provide a kind of self centring mandrels, have and do not need to beat zero by tools such as hammers Part may make fixture to link together with part, position to part.

The purpose of the above-mentioned utility model of the utility model has the technical scheme that

A kind of self centring mandrel, including mandrel, crushing block and axle sleeve offer cavity in the axle sleeve, the cavity Cross-sectional area is gradually reduced by one end to the other end of axle sleeve, and the mandrel is arranged through axle sleeve, and one end of the mandrel is located at The cavity is interior, the other end is provided with baffle, and the baffle is fixedly connected with the axle sleeve, and the crushing block is located at the cavity Interior, the crushing block is arranged on the mandrel and the internal perisporium of periphery wall and the cavity contradicts, and is provided in the cavity Pusher shoe for pushing crushing block mobile, the end of the axle sleeve offer the handle hole that pusher shoe is operated for people.

Through the above technical solutions, then making pusher shoe by handle hole in use, axle sleeve is entered in the hole on part Push crushing block so that crushing block is moved along axial direction to the lesser one end of cavity cross section product, at this time the internal perisporium of axle sleeve by Extruding from crushing block, axle sleeve will spreading interference fit is formed, with right so that the gap between axle sleeve and part is reduced Part is positioned, and part is enabled to rotate, processed with the rotation of self centring mandrel；It does not need to pass through hammer in this way The tools such as son beat part, and fixed and positioning can be completed to part, not only facilitates and can be avoided and cause to damage to part.

Further, the mandrel through the sleeve pocket cross-sectional area smallest end be arranged, the pusher shoe include across Handle hole is threaded in the bolt of the mandrel end, is arranged on the bolt and compresses plate.

Through the above technical solutions, rotation bolt, so that bolt is moved along the direction away from nut, compressing plate at this time will It is contradicted with crushing block and crushing block is pushed to move along axial direction to the lesser one end of cavity cross section product, at this time the internal perisporium of axle sleeve To will receive the extruding from crushing block, axle sleeve will spreading form interference so that the gap between axle sleeve and part is reduced and match It closes, to position to part, part is enabled to rotate, processed with the rotation of self centring mandrel；It is not required in this way Part is beaten by tools such as hammers, fixed or positioning can be completed to part, not only facilitates and can be avoided and part is made At damage.

Further, the mandrel through the sleeve pocket cross-sectional area most big end be arranged, the pusher shoe include across Handle hole is threaded in the bolt of the mandrel end always, and fixing sleeve is equipped with and compresses plate on the bolt, described to compress plate It is rotatably connected on the crushing block, the crushing block and described compress are provided with for preventing to compress plate and crushing block between plate The anti-falling piece of disengaging.

Through the above technical solutions, rotation bolt, so that bolt is mobile towards handle hole, setting due to anti-falling piece at this time It sets, compressing plate will link together with crushing block, and with the movement of bolt, crushing block will be will pull along axial direction to cavity by compressing plate The lesser one end of cross-sectional area is mobile, and the internal perisporium of axle sleeve will will receive the extruding from mandrel at this time, axle sleeve will spreading, make Gap between axle sleeve and part is reduced, form interference fit, to position to part, enable part with making by oneself The rotation of core mandrel and rotate, processed；It does not need to beat part by tools such as hammers in this way, part can be completed solid Fixed or positioning not only facilitates and can be avoided and causes to damage to part.

Further, the crushing block offers sliding slot in a ring close to handle hole side, and the plate that compresses is rotatably connected on In the sliding slot, the anti-falling piece is arranged on the sliding slot.

Through the above technical solutions, rotation bolt, compressing plate will be with the rotation of bolt and rotates, and with bolt court Mobile to handle hole, anti-falling piece, which will to compress plate, at this time is always positioned in sliding slot, compresses plate to reach and is able to drive extruding The purpose of block synchronizing moving.

Further, the anti-falling piece includes that anti-off board of the sliding slot far from crushing block side is arranged in, described to compress plate position Between the anti-off board and the sliding slot.

Through the above technical solutions, with the rotation of bolt, anti-off board, which to compress plate, to be always positioned in sliding slot, to prevent It compresses plate and crushing block is detached from, achieve the purpose that compressing plate is able to drive crushing block synchronizing moving.

Further, strip groove is provided in the axial direction on the periphery wall of the axle sleeve, the strip groove offers multiple and equal Even to be distributed on the axle sleeve, multiple strip grooves are arranged along the peripheral wall of axle sleeve described in depth penetration, each bar shaped One end of slot be open setting, the other end closure setting.

Through the above technical solutions, the end of axle sleeve is separated into multiple arcs piece by the setting of strip groove, in this way with crowded When briquetting is mobile to the lesser one end of cavity cross section product, the extruding force of axle sleeve self compaction in future block is by integrally decomposing to multiple arcs Shape on piece is easier to position part so that axle sleeve is easier to spreading.

Further, the strip groove is close to the setting open at one end for compressing plate.

Through the above technical solutions, axle sleeve is close to be supported when mobile to the lesser one end of cavity cross section product with crushing block Spreading can not only be realized the fixation to part by pressing plate end in this way, and in this way when axle sleeve spreading, axle sleeve volume biggish one End is plugged in part, so that part is not easy to be detached from axle sleeve.

Further, axially disposed on the internal perisporium of the cavity to have sliding rail, institute is corresponded on the periphery wall of the crushing block It states sliding rail and is provided with sliding block, the sliding block sliding is connected in the sliding rail.

Through the above technical solutions, sliding block is slid along sliding rail with the movement of crushing block so that axle sleeve spreading or It is reset to original state, the setting of sliding block and sliding rail play the guiding role, so that crushing block can only be moved along axial, to guarantee The effect of axle sleeve spreading.

In conclusion the advantageous effects of the utility model are as follows:

1. not needing to beat part by tools such as hammers, part can be completed to position, not only facilitate and can be avoided Part is caused to damage；

2. the end of axle sleeve is separated into multiple arcs piece by the setting of strip groove, in this way as crushing block is to cavity cross section When the lesser one end of product is mobile, axle sleeve by the extruding force from central spindle by integrally decomposing to multiple arcs on piece so that axle sleeve is more It is easy to spreading, that is, is easier to position part.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the embodiments of the present invention one.

Fig. 2 is the overall structure of the explosion figure of the embodiments of the present invention one.

Fig. 3 is the whole schematic cross-sectional view of the embodiments of the present invention one.

Fig. 4 is the overall structure diagram of the embodiments of the present invention two.

Fig. 5 is the whole schematic cross-sectional view of the embodiments of the present invention two.

In figure, 1, central spindle；11, crushing block；111, sliding block；12, baffle；2, axle sleeve；21, strip groove；22, handle hole；23, Sliding rail；24, cavity；3, pusher shoe；31, bolt；32, plate is compressed；33, sliding slot；331, anti-off board.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

It referring to Fig.1, is a kind of self centring mandrel disclosed by the utility model, including mandrel 1, crushing block 11 and axle sleeve 2, In, the cavity 24 that cross-sectional area is gradually reduced by one end to the other end of axle sleeve 2 is offered in axle sleeve 2, mandrel 1 runs through axle sleeve 2 One end of setting, such mandrel 1 will be located in cavity 24, and 1 other end of mandrel is provided with the baffle 12 being fixedly connected with axle sleeve 2, Crushing block 11 is set on mandrel 1 and the internal perisporium of periphery wall and cavity 24 contradicts.

It is axially disposed on the internal perisporium of cavity 24 to have sliding rail 23 referring to Fig. 2, sliding rail is corresponded on the periphery wall of crushing block 11 23 are provided with the sliding block 111 that sliding is connected in sliding rail 23, and with the movement of crushing block 11, sliding block 111 is slided along sliding rail 23 It moves, to achieve the purpose that guiding.

Referring to Fig. 2, multiple strip grooves 21 are provided in the axial direction on the periphery wall of axle sleeve 2, multiple strip grooves 21 are along depth It is arranged through the peripheral wall of axle sleeve 2 and is evenly distributed on axle sleeve 2, wherein each strip groove 21 is close to the one end for compressing plate 32 Opening setting, other end closure setting.

Referring to Fig. 3, the end of mandrel 1 is provided with the pusher shoe 3 for making crushing block 11 mobile, and the end of axle sleeve 2 is opened Equipped with the handle hole 22 for operating pusher shoe 3 for people.

Embodiment one

Referring to Fig. 3, mandrel 1 is through the setting of 2 cavity of axle sleeve, 24 cross-sectional area smallest end, and the structure of pusher shoe 3 can be with are as follows: Including bolt 31 and plate 32 is compressed, bolt 31, which runs through, compresses the end that plate 32 is threaded in mandrel 1,

The implementation principle of above-described embodiment are as follows: in use, by axle sleeve 2 in the hole compressed on 32 end of plate insertion part, Then bolt 31 is rotated by handle hole 22, so that bolt 31 is mobile towards handle hole 22, setting due to anti-off board 331 at this time It sets, with the movement of bolt 31, crushing block 11 will be will pull along axial direction to the lesser one end of 24 cross-sectional area of cavity by compressing plate 32 Mobile, since axle sleeve 2 is separated into multiple arcs piece close to compressing 32 end of plate by strip groove 21, the internal perisporium of axle sleeve 2 will at this time By the extruding from crushing block 11, axle sleeve 2 is plugged on the end in part by spreading, so that the seam between axle sleeve 2 and part Gap is reduced, and forms interference fit, to be positioned to part, part is rotated with the rotation of self centring mandrel, It is processed.

Embodiment two

Referring to Fig. 4, mandrel 1 can be arranged through 2 cavity of axle sleeve, 24 cross-sectional area most big end, referring to the knot of Fig. 5 pusher shoe 3 Structure can be with are as follows: including bolt 31, compresses plate 32 and is provided with crushing block 11 close to the sliding slot 33 of 22 side of handle hole, wherein sliding slot 33 in a ring, and bolt 31 passes through handle hole 22 and is threaded in 1 end of mandrel always, compresses the fixation of plate 32 and is set in bolt 31 It goes up and is rotatably connected in sliding slot 33, sliding slot 33 is provided with anti-off board 331 far from 11 side of crushing block, compresses plate 32 and is located at anti-off board Between 331 and sliding slot 33.

The implementation principle of above-described embodiment are as follows: in use, by axle sleeve 2 in the hole compressed on 32 end of plate insertion part, Then bolt 31 is rotated by handle hole 22, so that the drive of bolt 31 compresses plate 32 and moves to the lesser one end of 24 cross-sectional area of cavity Dynamic, since axle sleeve 2 is separated into multiple arcs piece close to compressing 32 end of plate by strip groove 21, the internal perisporium of axle sleeve 2 will be by this time The extruding of arrival self compaction block 11, axle sleeve 2 are plugged on the end in part by spreading, so that the gap between axle sleeve 2 and part Reduce, formed interference fit, to be positioned to part, part is rotated with the rotation of self centring mandrel, into Row processing.

The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical Within novel protection scope.

Claims (8)

1. a kind of self centring mandrel, it is characterised in that: including mandrel (1), crushing block (11) and axle sleeve (2), in the axle sleeve (2) It offers cavity (24), the cross-sectional area of the cavity (24) is gradually reduced by one end to the other end of axle sleeve (2), the mandrel (1) it is arranged through axle sleeve (2), one end of the mandrel (1) is located in the cavity (24), the other end is provided with baffle (12), The baffle (12) is fixedly connected with the axle sleeve (2), and the crushing block (11) is located in the cavity (24), the crushing block (11) it is set on the mandrel (1) and periphery wall and the internal perisporium of the cavity (24) contradicts, setting in the cavity (24) There is the pusher shoe (3) for pushing crushing block (11) mobile, the end of the axle sleeve (2), which is offered, operates pusher shoe (3) for people Handle hole (22).

2. a kind of self centring mandrel according to claim 1, it is characterised in that: the mandrel (1) runs through the axle sleeve (2) The setting of cavity (24) cross-sectional area smallest end, the pusher shoe (3) includes being threaded in the mandrel across handle hole (22) (1) bolt (31) of end is arranged on the bolt (31) and compresses plate (32).

3. a kind of self centring mandrel according to claim 1, it is characterised in that: the mandrel (1) runs through the axle sleeve (2) The setting of cavity (24) cross-sectional area most big end, the pusher shoe (3) include be threaded in always across handle hole (22) it is described The bolt (31) of mandrel (1) end, fixing sleeve is equipped with and compresses plate (32) on the bolt (31), described to compress plate (32) rotation and connect It connects on the crushing block (11), the crushing block (11) and described compress are provided with for preventing to compress plate between plate (32) (32) anti-falling piece being detached from crushing block (11).

4. a kind of self centring mandrel according to claim 3, it is characterised in that: the crushing block (11) is close to handle hole (22) side offers sliding slot (33) in a ring, and the plate (32) that compresses is rotatably connected in the sliding slot (33), the anticreep Part is arranged on the sliding slot (33).

5. a kind of self centring mandrel according to claim 4, it is characterised in that: the anti-falling piece includes being arranged in the cunning Anti-off board (331) of the slot (33) far from crushing block (11) side, described compress plate (32) are located at the anti-off board (331) and the cunning Between slot (33).

6. self centring mandrel according to claim 1, it is characterised in that: opened on the periphery wall of the axle sleeve (2) along axial direction Equipped with strip groove (21), the strip groove (21) offers multiple and is evenly distributed on the axle sleeve (2), multiple bar shapeds Slot (21) along axle sleeve described in depth penetration (2) peripheral wall be arranged, one end of each strip groove (21) be open setting, separately One end closure setting.

7. self centring mandrel according to claim 6, it is characterised in that: the strip groove (21) is close to compress plate (32) Setting open at one end.

8. a kind of self centring mandrel according to claim 1, it is characterised in that: along axis on the internal perisporium of the cavity (24) To being provided with sliding rail (23), the sliding rail (23) is corresponded on the periphery wall of the crushing block (11) and is provided with sliding block (111), it is described Sliding block (111) sliding is connected in the sliding rail (23).