CN208067349U

CN208067349U - Interior swollen chuck

Info

Publication number: CN208067349U
Application number: CN201820577502.4U
Authority: CN
Inventors: 覃泽乐
Original assignee: NINGBO FENGZHOU MACHINERY CO Ltd
Current assignee: Zhejiang Fengzhou Precision Manufacturing Co., Ltd.
Priority date: 2018-04-20
Filing date: 2018-04-20
Publication date: 2018-11-09
Anticipated expiration: 2028-04-20

Abstract

The utility model is related to swollen chucks in internal-expansion type chuck device technical field more particularly to one kind.Above-mentioned interior swollen chuck includes chuck body, integrated expansion set, pull rod and transmission component；Integrated expansion set includes at least two claws and at least two elastic structures, and affixed elastic structure between each adjacent two claw, claw surrounds ring-shaped structure with elastic structure；The vertically arranged and in a circular table shape axis of cone is provided at the top of chuck body, and the top surface area of the axis of cone is less than base area；Integrated expansion set is set in the axis of cone and is slidably matched with the axis of cone, and the lateral wall of integrated expansion set can be abutted with the inner circle of workpiece；Offer through-hole on chuck body, the central shaft of through-hole and the center overlapping of axles of the axis of cone or parallel；Pull rod is slidably matched with through-hole, and the bottom end of pull rod is connect with transmission component, and pull rod can coordinate with transmission component drives integrated expansion set to be moved up and down along the axis of cone.Interior swollen chuck repetitive positioning accuracy provided by the utility model is high, small to the damaged condition of workpiece.

Description

Interior swollen chuck

Technical field

The utility model is related to swollen chucks in internal-expansion type chuck device technical field more particularly to one kind.

Background technology

When being processed to workpiece using lathe, it will usually first with chuck by Workpiece clamping, so that following process is grasped Make.

Wherein, for need carry out inner circle clamping workpiece, existing chuck be substantially using the claw on chuck come Clamp workpiece.However, in the prior art, each claw on chuck is relatively independent, in the workpiece on replacing claw, The position location of claw is easy to change, and the situation for causing repetitive positioning accuracy low occurs, and increases the several of workpiece damage Rate.

To sum up, how to overcome the drawbacks described above of existing chuck is those skilled in the art's technical problem urgently to be resolved hurrily.

Utility model content

The purpose of this utility model is to provide swollen chucks in one kind, are easy existing for chuck in the prior art with alleviating Crush workpiece, and the technical problem that repetitive positioning accuracy is low.

Interior swollen chuck provided by the utility model, including chuck body, integrated expansion set, pull rod and transmission component.

Wherein, the integrated expansion set includes at least two claws and at least two elastic structures, described in each adjacent two Affixed elastic structure between claw, the claw surround ring-shaped structure with the elastic structure；It is described The vertically arranged and in a circular table shape axis of cone is provided at the top of chuck body, and the top surface area of the axis of cone is less than base area； The integrated expansion set is set in the axis of cone and is slidably matched with the axis of cone, and the lateral wall of the integrated expansion set can be with work The inner circle of part abuts.

Offer through-hole on the chuck body, the central shaft of the through-hole and the center overlapping of axles of the axis of cone or parallel； The pull rod is slidably matched with the through-hole, and the bottom end of the pull rod is connect with the transmission component, the pull rod can with it is described Transmission component cooperation drives the integrated expansion set to be moved up and down along the axis of cone.

Preferably, as a kind of embodiment, the claw is fan-shaped claw, and the fan of each fan-shaped claw Shape face is a part for the outer ring surface of the ring-shaped structure, and the sum of the central angle of sector of multiple fan-shaped claws is more than 180 degree.

Preferably, as a kind of embodiment, the transmission component includes sliding part and guide pin, the chuck body Bottom offers mounting groove, and the sliding part is slidably matched with the mounting groove；It is further opened on the chuck body and runs through up and down The mounting hole of the chuck body, the guide pin are slidably matched with the mounting hole；The guide pin and the pull rod are and institute Sliding part connection is stated, is provided with the limiting section protruded to side at the top of the pull rod, the integrated expansion set is stuck in the limit Between portion and the guide pin.

Preferably, as a kind of embodiment, the first limit is provided between the guide pin and the integrated expansion set Part, first locating part are fixedly connected with the top of the guide pin, and first locating part is abutted with the integrated expansion set； It is provided with positioning region protruding upward on first locating part, locating slot is provided between the two neighboring claw, it is described Positioning region is corresponded with the locating slot, and the positioning region coordinates with the corresponding locating slot.

Preferably, as a kind of embodiment, the guide pin at least two, and the guide pin is evenly distributed on The side of the axis of cone；First locating part is cyclic structure part, and first locating part is set in the axis of cone, often A guide pin is fixedly connected with first locating part.

Preferably, as a kind of embodiment, the bottom of the chuck body is connected with the second locating part, second limit Position part is used to limit the stroke of the sliding part.

Preferably, as a kind of embodiment, the bottom of the chuck body offers limiting slot, the depth of the limiting slot Depth of the degree less than the mounting groove；Second locating part is cyclic structure, and second locating part is embedded in the limit In slot, the inwardly projecting cell wall in the mounting groove of the second spacing ring is for limiting the sliding part in the mounting groove Sliding.

Preferably, it as a kind of embodiment, is offered at the top of the sliding part and the guide pin corresponds Groove, be both provided with elastic component in each groove, and the both ends of the elastic component bottom end with the guide pin respectively It is abutted with the slot bottom of the groove.

Preferably, as a kind of embodiment, the elastic structure is vulcanized rubber.

Preferably, as a kind of embodiment, the outside of the integrated expansion set is set with locating ring, the locating ring with The chuck body is fixedly connected, and there are gaps between the locating ring and the integrated expansion set.

Compared with prior art, the utility model has the advantage of：

Interior swollen chuck provided by the utility model is mainly made of chuck body, integrated expansion set, pull rod and transmission component, In, integrated expansion set includes at least two claws and at least two elastic structures, affixed one between each adjacent two claw A elastic structure forms ring-shaped structure；Because integrating expansion set each adjacent two claw connected by elastic structure, And can flexible deformation occur under the effect of external force for elastic structure, so, the gap size energy between each adjacent two claw It is enough to adjust.It is provided with the round table-like axis of cone at the top of chuck body, integrated expansion set is sleeved in the axis of cone and is slidably matched with the axis of cone, collects It can also be abutted with the inner circle of workpiece at the lateral wall of expansion set, setting the axis of cone to top surface area is less than base area, the i.e. axis of cone Upright setting, in order to integrated expansion set can by being set in the axis of cone at the top of the axis of cone, also allow for workpiece be set to by top it is integrated swollen It puts on, prevents from hindering workpiece to be inserted at the top of the axis of cone, while also ensuring that the structure of chuck body is powerful；Center is opened up on chuck body Axis and the center overlapping of axles of the axis of cone or parallel through-hole, pull rod and through-hole are slidably matched, and by the bottom end of pull rod and transmission group Part connects so that pull rod can coordinate with transmission component drives integrated expansion set to be moved up and down along the axis of cone.

When needing to position workpiece, integrated expansion set is inserted in by after in the through-hole of positioning workpiece, it can be by pulling pull rod simultaneously Coordinate transmission component, pull rod is moved to the larger direction of axis of cone cross-sectional area；In this process, integrate expansion set can because with The position cross-sectional area of axis of cone contact becomes larger and generates the trend of lateral expansion, and at this moment, elastic structure will laterally be drawn It stretches, increases the gap between two neighboring claw so that the lateral wall of integrated expansion set can be filled with the inner circle of the workpiece positioned Divide and abut, to clamp workpiece.It, can be by pulling pull rod and coordinating transmission group when needing to separate workpiece from integrated expansion set Part moves pull rod to the smaller direction of axis of cone cross-sectional area, and in this process, integrated expansion set can be because contacting with the axis of cone Position cross-sectional area becomes smaller and generates the trend of cross-direction shrinkage, and at this moment, each adjacent two claw will be in elastic structure It is close to each other under effect, reduce the gap between two neighboring claw so that the lateral wall of integrated expansion set, which can be detached from, to be positioned Workpiece inner circle, integrating expansion set, central shaft can be constant always under the positioning action of the axis of cone, and repetitive positioning accuracy is high, reduces Damage to workpiece.

In addition, when being processed to the workpiece being clamped on interior swollen chuck, the elastic structure integrated on expansion set can also The vibrations that a part of workpiece generates are absorbed, the damage because of the internal swollen chuck of vibration of workpiece is reduced, extends making for interior swollen chuck Use the service life.

Therefore, interior swollen chuck provided by the utility model, repetitive positioning accuracy is high, small to the damaged condition of workpiece.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, other drawings may also be obtained based on these drawings.

Fig. 1 is the positive structure diagram for the interior swollen chuck that the utility model embodiment provides；

Fig. 2 is the schematic cross-sectional view for the interior swollen chuck that the utility model embodiment provides；

Fig. 3 is the schematic cross-sectional view for the chuck body that the utility model embodiment provides；

Fig. 4 is the assembling structure schematic diagram of integrated expansion set and the second locating part that the utility model embodiment provides；

Fig. 5 is the dimensional structure diagram for the integrated expansion set that the utility model embodiment provides.

Icon：1- chuck bodies；2- integrates expansion set；3- pull rods；4- transmission components；The second locating parts of 5-；6- is positioned Ring；

The 11- axis of cone；12- through-holes；13- mounting grooves；14- mounting holes；15- limiting slots；

21- claws；22- elastic structures；23- locating slots；

31- limiting sections；

41- sliding parts；42- guide pins；The first locating parts of 43-；The positioning regions 431-；44- elastic components.

Specific implementation mode

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality Novel protected range.

In the description of the present invention, it should be noted that the fingers such as term "center", "top", "bottom", "inner", "outside" The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and Simplify description, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration And operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " are used for description purposes only, It is not understood to indicate or imply relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in utility model.

The utility model is further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.

Referring to Fig. 1-Fig. 3, provide swollen chuck in one kind in one embodiment, including chuck body 1, integrated expansion set 2, Pull rod 3 and transmission component 4.

Wherein, the integrated expansion set 2 includes at least two claws 21 and at least two elastic structures 22, each adjacent two Affixed elastic structure 22 between the claw 21, the claw 21 surround annulus with the elastic structure 22 Shape structure；The top of the chuck body 1 is provided with the vertically arranged and in a circular table shape axis of cone 11, and the top surface face of the axis of cone 11 Product is less than base area；The integrated expansion set 2 is set in the axis of cone 11 and is slidably matched with the axis of cone 11, described integrated The lateral wall of expansion set 2 can be abutted with the inner circle of workpiece.

Through-hole 12, the center overlapping of axles of the central shaft of the through-hole 12 and the axis of cone 11 are offered on the chuck body 1 Or it is parallel；The pull rod 3 is slidably matched with the through-hole 12, and the bottom end of the pull rod 3 is connect with the transmission component 4, described Pull rod 3 can coordinate with the transmission component 4 drives the integrated expansion set 2 to be moved up and down along the axis of cone 11.

It analyzes known to main connection relation and the position relationship of above structure：Because integrating 2 each adjacent two claw 21 of expansion set All connected by elastic structure 22, and can flexible deformation occur under the effect of external force for elastic structure 22, so, often Gap size between two neighboring claw 21 can be adjusted.The top of chuck body 1 is provided with the round table-like axis of cone 11, will integrate Expansion set 2 is sleeved in the axis of cone 11 and is slidably matched with the axis of cone 11, and the lateral wall of integrated expansion set 2 can also be abutted with the inner circle of workpiece, It sets the axis of cone 11 to top surface area and is less than base area, i.e. 11 upright setting of the axis of cone, in order to which integrated expansion set 2 can be by the axis of cone 11 top is set in the axis of cone 11, is also allowed for workpiece and is set on integrated expansion set 2 by top, prevents 11 top of the axis of cone from hindering workpiece set Enter, while also ensuring that the structure of chuck body 1 is powerful；Opened up on chuck body 1 central shaft and the axis of cone 11 center overlapping of axles or Parallel through-hole 12, pull rod 3 and through-hole 12 are slidably matched, and the bottom end of pull rod 3 is connect with transmission component 4 so that pull rod 3 Can coordinate with transmission component 4 drives integrated expansion set 2 to be moved up and down along the axis of cone 11.

When needing to position workpiece, integrated expansion set 2 is inserted in by after in the through-hole 12 of positioning workpiece, can pass through and pull pull rod 3 and coordinate transmission component 4, pull rod 3 is moved to the larger direction of 11 cross-sectional area of the axis of cone；In this process, it integrates swollen Set 2 can generate the trend of lateral expansion, at this moment, elastic structure 22 because the position cross-sectional area contacted with the axis of cone 11 becomes larger Will the gap between two neighboring claw 21 be increased by cross directional stretch so that the lateral wall of integrated expansion set 2 can with positioned The inner circle of workpiece fully abut, to clamp workpiece.When needing to separate workpiece from integrated expansion set 2, can be drawn by pulling Bar 3 simultaneously coordinates transmission component 4, and pull rod 3 is moved to the smaller direction of 11 cross-sectional area of the axis of cone, in this process, is integrated Expansion set 2 can generate the trend of cross-direction shrinkage, at this moment, each adjacent two because the position cross-sectional area contacted with the axis of cone 11 becomes smaller Claw 21 will be close to each other under the action of elastic structure 22, reduces the gap between two neighboring claw 21 so that collection It can be detached from the inner circle of the workpiece positioned at the lateral wall of expansion set 2, integrate the central shaft under the positioning action of the axis of cone 11 of expansion set 2 Can be constant always, repetitive positioning accuracy is high, reduces the damage to workpiece.

In addition, when being processed to the workpiece being clamped on interior swollen chuck, the elastic structure 22 integrated on expansion set 2 is gone back The vibrations that a part of workpiece generates can be absorbed, the damage because of the internal swollen chuck of vibration of workpiece is reduced, extends interior swollen chuck Service life.

Therefore, interior swollen chuck provided in this embodiment, repetitive positioning accuracy is high, small to the damaged condition of workpiece.

Based on the above technical solution, the scheme for adding specific structure as follows is additionally provided, and is illustrated every A corresponding technique effect of technical solution：

In concrete structure, referring to Fig. 5, claw 21 can be set to fan-shaped claw 21, and by the sector of fan-shaped claw 21 Setting outwardly is the part that the sector of each fan-shaped claw 21 is the outer ring surface of ring-shaped structure, meanwhile, by multiple fans The sum of the central angle of sector of shape claw 21 is set greater than 180 degree；The card of workpiece inner circle is clamped in compared with the existing technology For pawl 21, central angle summation is more than the contact area bigger of the fan-shaped claw 21 and workpiece inner circle of 180 degree, reduces to workpiece Damaged condition.

Referring to Fig. 2, sliding part 41 and guide pin 42 are provided in the concrete structure of transmission component 4, at the bottom of chuck body 1 Portion opens up mounting groove 13, and sliding part 41 and mounting groove 13 are slidably matched, and is opened up on chuck body 1 and run through chuck body 1 up and down Mounting hole 14, guide pin 42 and mounting hole 14 are slidably matched, and guide pin 42 and pull rod 3 are connect with sliding part 41, In this way, when pulling through-hole 12 of the pull rod 3 on chuck body 1 to move up or down, pull rod 3 can drive sliding part 41 along installation Slot 13 moves up or down, and mounting hole 14 of the energy band action-oriented pin 42 on chuck body 1 moves sliding part 41 upward or downward again It is dynamic, that is, enable pull rod 3 and 42 synchronizing moving of guide pin；The limiting section 31 protruded to side is set at the top of pull rod 3, with Integrated expansion set 2 is stuck between limiting section 31 and guide pin 42, in this way, when pulling pull rod 3 to move up or down, Integrated expansion set 2 can move up or down under the drive of guide pin 42 and limiting section 31.

It should be noted that mounting groove 13 is capable of the track that moves up and down of limit slippage part 41, mounting hole 14 can limit Guide pin 42 moves up and down track, to so that the motion track of integrated expansion set 2 is limited, and moving process is more steady The case where determining, and 2 central shaft of integrated expansion set further prevented to deviate initial position.

Further, referring to Fig. 4, the first locating part 43 is set between guide pin 42 and integrated expansion set 2, and first is limited Position part 43 is fixedly connected with the top of guide pin 42, and the first locating part 43 is abutted with integrated expansion set 2, passes through the first locating part The integrated expansion set 2 of 43 realizations is indirectly connected with guide pin 42；Positioning region 431 protruding upward is set on the first locating part 43, And setting locating slot 23 (can be realized, i.e. elasticity by reducing the length of elastic structure 22 between two neighboring claw 21 Structural member 22 may not extend to the bottom in the gap of two neighboring claw 21, form locating slot 23), by positioning region 431 and positioning Slot 23 corresponds, and positioning region 431 is coordinated with corresponding locating slot 23；Because guide pin 42 is the installation positioned at chuck body 1 In hole 14, i.e., transverse shifting will not occur for guide pin 42, therefore the first locating part 43 being fixedly connected with guide pin 42 is just not yet Transverse shifting can occur, to which under the positioning action of positioning region 431 and locating slot 23, integrated expansion set 2 would not occur around cone The own rotation of axis 11, to play good locating effect to workpiece.

Preferably, it sets the first locating part 43 to cyclic structure part, and the first locating part 43 is sleeved in the axis of cone 11, with The position of the first locating part 43 is enable to obtain the restriction of the axis of cone 11；Guide pin 42 is set as at least two, and will be oriented to Pin 42 is evenly distributed on the side of the axis of cone 11, and each guide pin 42 is fixedly connected with the first locating part 43, so that being oriented to Pin 42 can further be defined the position of the first locating part 43, enhance the locating effect to workpiece.

Further, referring to Fig. 2, the second locating part 5 is connected in the bottom of chuck body 1, to be limited using the second locating part 5 The stroke of sliding part 41 so that integrated expansion set 2 can move up and down under the drive of sliding part 41 in reasonable range.

In concrete structure, referring to Fig. 3, limiting slot 15 is opened up in the bottom of chuck body 1, and the depth of limiting slot 15 is arranged For the depth less than mounting groove 13, meanwhile, set the second locating part 5 to cyclic structure, and the second locating part 5 is embedded in limit In the slot 15 of position, by the 5 inwardly projecting cell wall in mounting groove 13 of the second locating part, 13 slot of mounting groove is protruded from the second locating part 5 The part of wall can keep out sliding part 41 in 41 slide downward of sliding part, and sliding part 41 is prevented to be detached from mounting groove 13 so that sliding Moving part 41 being capable of the sliding in mounting groove 13 always.

Preferably, the top of sliding part 41 open up with 42 one-to-one groove of guide pin, and in each groove Elastic component 44 is set, the both ends of elastic component 44 are abutted with the slot bottom of the bottom end of guide pin 42 and groove respectively；When integrated expansion set 2 On certain two or more claw 21 when moving asynchronous, elastic component 44 can play a role, and the height for adjusting guide pin 42 is low Difference reduces the mutual abrasion between guide pin 42 and mounting hole 14, ensures precision and service life.

Particularly, elastic component 44 can be set to spring or excellent power glue, preferably excellent power glue is good with intensity, and compression becomes The small characteristic of shape not only has the rigidity of plastics, but also has the elasticity of rubber, is applicable in very much and the elastic component in effect the present embodiment 44。

Preferably, the elastic structure 22 in integrated expansion set 2 can be set to vulcanized rubber, vulcanized rubber has higher Elasticity, heat resistance, tensile strength and indissolubility etc. in organic solvent, can stretch, be not easy in work pieces process repeatedly Denaturation.

Preferably, in the external empty set locating ring 6 of integrated expansion set 2, locating ring 6 is fixedly connected with chuck body 1, to utilize Locating ring 6 positions workpiece；Gap is set between locating ring 6 and integrated expansion set 2, so that integrated expansion set 2 can be It is freely moved up and down in locating ring 6.

Particularly, annular groove is opened up on the side wall that sliding part 41 and mounting groove 13 are slidably matched, and in annular groove Interior installation O-ring seals prevent turning liquid to make sliding part 41 be sealed cooperation with mounting groove 13 using O sealing rings Or other impurities enter lathe spindle endoporus.

In conclusion the utility model embodiment discloses swollen chuck in one kind, which overcome many of traditional chuck Technological deficiency.The interior swollen chuck that the utility model embodiment provides, repetitive positioning accuracy is high, small to the damaged condition of workpiece.

Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new The range of each embodiment technical solution of type.

Claims

1. swollen chuck in one kind, which is characterized in that including chuck body, integrated expansion set, pull rod and transmission component；

Wherein, the integrated expansion set includes at least two claws and at least two elastic structures, claw described in each adjacent two Between affixed elastic structure, the claw and the elastic structure surround ring-shaped structure；The chuck The vertically arranged and in a circular table shape axis of cone is provided at the top of body, and the top surface area of the axis of cone is less than base area；It is described Integrated expansion set is set in the axis of cone and is slidably matched with the axis of cone, and the lateral wall of the integrated expansion set can be with workpiece Inner circle abuts；

Offer through-hole on the chuck body, the central shaft of the through-hole and the center overlapping of axles of the axis of cone or parallel；It is described Pull rod is slidably matched with the through-hole, and the bottom end of the pull rod is connect with the transmission component, and the pull rod can be with the transmission Component cooperation drives the integrated expansion set to be moved up and down along the axis of cone.

2. interior swollen chuck according to claim 1, which is characterized in that the claw is fan-shaped claw, and each described The sector of fan-shaped claw is a part for the outer ring surface of the ring-shaped structure, the circle of the sector of multiple fan-shaped claws The sum of heart angle is more than 180 degree.

3. interior swollen chuck according to claim 1 or 2, which is characterized in that the transmission component includes sliding part and guiding Pin, the bottom of the chuck body offer mounting groove, and the sliding part is slidably matched with the mounting groove；On the chuck body also The mounting hole for running through the chuck body up and down is offered, the guide pin is slidably matched with the mounting hole；The guide pin and The pull rod is connect with the sliding part, and the limiting section protruded to side is provided at the top of the pull rod, described integrated swollen Set is stuck between the limiting section and the guide pin.

4. interior swollen chuck according to claim 3, which is characterized in that be arranged between the guide pin and the integrated expansion set There are the first locating part, first locating part to be fixedly connected with the top of the guide pin, first locating part and the collection It is abutted at expansion set；It is provided with positioning region protruding upward on first locating part, is provided between the two neighboring claw Locating slot, the positioning region are corresponded with the locating slot, and the positioning region coordinates with the corresponding locating slot.

5. interior swollen chuck according to claim 4, which is characterized in that the guide pin at least two, and the guiding Pin is evenly distributed on the side of the axis of cone；First locating part is cyclic structure part, and first locating part is set in In the axis of cone, each guide pin is fixedly connected with first locating part.

6. interior swollen chuck according to claim 5, which is characterized in that the bottom of the chuck body is connected with the second limit Part, second locating part are used to limit the stroke of the sliding part.

7. interior swollen chuck according to claim 6, which is characterized in that the bottom of the chuck body offers limiting slot, institute The depth for stating limiting slot is less than the depth of the mounting groove；Second locating part is cyclic structure, and second locating part is embedding Enter in the limiting slot, the inwardly projecting cell wall in the mounting groove of the second spacing ring exists for limiting the sliding part Sliding in the mounting groove.

8. interior swollen chuck according to claim 3, which is characterized in that offered at the top of the sliding part and the guiding One-to-one groove is sold, is both provided with elastic component in each groove, and the both ends of the elastic component are led with described respectively It is abutted to the slot bottom of the bottom end of pin and the groove.

9. interior swollen chuck according to claim 1 or 2, which is characterized in that the elastic structure is vulcanized rubber.

10. interior swollen chuck according to claim 1 or 2, which is characterized in that the outside of the integrated expansion set is set with positioning Ring, the locating ring are fixedly connected with the chuck body, and there are gaps between the locating ring and the integrated expansion set.