CN210023817U

CN210023817U - Elastic positioning type gas-liquid chuck

Info

Publication number: CN210023817U
Application number: CN201920795553.9U
Authority: CN
Inventors: 刘明亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-02-07
Anticipated expiration: 2029-05-29

Abstract

The utility model discloses an elasticity location type gas-liquid chuck relates to the chuck device technical field that the lathe was used, has solved among the prior art because only through clearance fit between each spare part of chuck, makes the chuck diameter do the technical problem that big back card is dead or rocks easily. The clamping device comprises a shell, a piston cylinder, a core print and a base, wherein an elastic part is arranged between the piston cylinder and the core print, so that the side wall of the piston cylinder is positioned between the shell and the core print under the elastic action, and the bottom of the base is connected with a clamping jaw for clamping a workpiece. The utility model discloses an elastic action of elastic component makes the accurate location of lateral wall of piston cylinder between shell and core print seat, and the utility model discloses the machining precision requirement to each spare part of chuck is not high, nevertheless makes the precision fit between each spare part higher in the chuck use, can solve the precision positioning problem of the chuck more than the diameter 150 millimeters, guarantees when zero clearance fit that the piston cylinder is difficult to the card and dies or rock.

Description

Elastic positioning type gas-liquid chuck

Technical Field

The utility model relates to a chuck device technical field that the lathe was used particularly, indicates an elasticity location type gas-liquid chuck.

Background

The chuck is a mechanical device for clamping a workpiece on a machine tool, and is a machine tool accessory for clamping and positioning the workpiece by utilizing the radial movement of movable clamping jaws uniformly distributed on the chuck. The chuck is generally composed of a chuck body, a movable jaw and a jaw driving mechanism, and is usually installed on a lathe, a cylindrical grinding machine and an internal grinding machine for use, and can also be matched with various indexing devices for use on a milling machine and a drilling machine.

The prior art chucks, particularly air chucks or hydraulic chucks, are usually positioned by clearance fit, and when the smaller the clearance between the chuck parts is made, the higher the positioning accuracy between the chuck parts is. However, as industry develops, the diameter of the workpiece becomes larger, which requires the diameter of the chuck to also become larger. And after the size becomes bigger, the precision of the chuck is difficult to be ensured, in addition, the assembly difficulty of each part of the chuck is improved, and the chuck is easy to be blocked or shakes greatly when in use. Therefore, the prior art chucks achieve the accuracy requirement by clearance fit, so that the diameter of the chuck can only be less than 150 mm.

Therefore, it is an urgent need to provide a chuck having a large diameter and capable of solving the problem of precise matching between the parts of the chuck.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the not enough of prior art, provide an elasticity location type gas-liquid chuck to because only through clearance fit between each spare part of chuck among the solution prior art, make the chuck diameter do the easy dead or technical problem who rocks of card after big.

The utility model provides a technical scheme that this technical problem adopted is:

the utility model provides an elasticity location type gas-liquid chuck, includes shell, piston cylinder, core print and base, be provided with the elastic component between piston cylinder and the core print, make the lateral wall of piston cylinder be located between shell and core print under the elastic action, the bottom of base is connected with the jack catch that is used for pressing from both sides tight work piece.

On the basis of the technical scheme, the elastic positioning type gas-liquid chuck can be further improved as follows.

Furthermore, the core print is the step structure, makes core print with the piston cylinder forms the cavity in the step position, the elastic component is installed in the cavity.

Furthermore, a notch is formed in the position, close to the side wall of the piston cylinder, of the elastic part, and a non-closed annular metal ring is arranged in the notch.

Furthermore, an oil groove for filling lubricating oil is further formed in the position, close to the side wall of the piston cylinder, of the elastic piece.

Further, the elastic part is made of nylon, rubber, silica gel, cowhells or hollow metal.

Further, the piston cylinder bottom has the annular wedge mouth of complete ring, is provided with the spacing groove that plays limiting displacement to the removal of wedge mouth on the base, still is connected with the slider that has the wedge groove on the base, and spacing groove and wedge groove are constituteed and are moved on the base with the corresponding complete circular ring groove structure of wedge mouth, and the wedge mouth cooperates wedge groove drive slider when the spacing inslot removes.

Further, a T-shaped groove is formed in the sliding block, a T-shaped sliding block is arranged in the T-shaped groove, threaded holes corresponding to the positions of the T-shaped sliding block and the clamping jaws are formed in the T-shaped sliding block and the clamping jaws, and the clamping jaws are fixedly connected with the T-shaped sliding block through bolts.

Furthermore, rack surfaces are respectively arranged on contact surfaces of the T-shaped sliding block and the clamping jaws, and the T-shaped sliding block and the clamping jaws are meshed and connected through the rack surfaces.

Furthermore, a central column penetrating through the outer shell is arranged on the core print seat, a medium hole a and a medium hole b are arranged on the central column, the medium hole a is communicated between the outer shell and the piston cylinder, and the medium hole b is communicated between the piston cylinder and the core print seat.

Furthermore, sealing rings are arranged among the shell, the piston cylinder, the elastic piece and the core seat.

Compared with the prior art, the utility model provides an elasticity location type gas-liquid chuck has beneficial effect is:

1. the utility model discloses an elastic action of elastic component can make the accurate location of the lateral wall of piston cylinder between shell and core print seat to make the stroke of jack catch accurate. Be different from only through clearance fit's chuck among the prior art, the utility model discloses the machining precision requirement to each spare part of chuck is not high, nevertheless makes the precision fit between each spare part higher in the chuck use, can solve the precision positioning problem of the chuck more than diameter 150 millimeters, guarantees the piston cylinder and is difficult to the card and dies or rock in clearance fit.

2. The utility model discloses the bottom of piston cylinder is the annular wedge mouth of complete circle, after the jack catch presss from both sides tight work piece atress, the jack catch drives the wedge mouth that the slider made the wedge groove position and produces small deformation to make the piston cylinder bottom warp to non-circular form after the multiple spot atress, thereby make the piston cylinder directly hold tightly on base and slider, and hold tightly the center of resultant force and the center coincidence of chuck, make the chuck reach the stress balance state, strengthened the location of piston cylinder between shell and core seat.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of the elastic positioning gas-liquid chuck of the present invention;

FIG. 2 is a schematic view of the exploded structure of the elastic positioning gas-liquid chuck of the present invention;

FIG. 3 is a front perspective view of the assembly structure of the elastic positioning gas-liquid chuck of the present invention;

FIG. 4 is a back perspective view of the assembly of the spring-loaded gas-liquid chuck of the present invention;

fig. 5 is a schematic cross-sectional view of another embodiment of the elastic force positioning type gas-liquid chuck according to the present invention.

In the figure:

1-a housing; 2, a piston cylinder; 21-a wedge; 3-an elastic member; 4-a metal ring; 5, a core seat; 51-a medium hole; 52-b media pores; 6, a base; 61-a limiting groove; 7, a sliding block; 71-wedge groove; 8-T-shaped sliding blocks; 9-a claw; 10-sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are merely exemplary of the invention and are not intended to be exhaustive. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

an elastic positioning type gas-liquid chuck is shown in figures 1 to 4 and comprises a shell 1, a piston cylinder 2, an elastic piece 3, a core print 5, a base 6, a slide block 7 and a claw 9. The piston cylinder 2 is sleeved in the shell 1 and can freely slide in the shell 1, and center holes are formed in the centers of the shell 1 and the piston cylinder 2. The core print 5 is a step structure, a central column penetrating through the central holes of the outer shell 1 and the piston cylinder 2 is arranged at the center of the core print 5, a medium hole a 51 and a medium hole b 52 are arranged on the central column, the medium hole a 51 is communicated between the outer shell 1 and the piston cylinder 2, and the medium hole b 52 is communicated between the piston cylinder 2 and the core print 5. The bottom of the base 6 is connected with a claw 9 for clamping a workpiece.

As shown in fig. 1 to 4, the cartridge holder 5 forms a cavity with the piston cylinder 2 at a stepped position, and the elastic member 3 is fitted in the cavity. The elastic member 3 may be made of a material having elastic expansion and contraction amount, such as nylon, rubber, silica gel, cowhells or hollow metal.

When a medium (gas or liquid) enters between the shell 1 and the piston cylinder 2 from the medium hole 51 a or enters between the piston cylinder 2 and the core print 5 from the medium hole 52 b, the piston cylinder 2 moves in the shell 1 to drive the jaws 9 to clamp a workpiece. In the process, due to the existence of the elastic element 3, the outer side wall of the piston cylinder 2 is tightly attached to the inner side wall of the shell 1 under the elastic action, no gap exists between the shell 1 and the piston cylinder 2, and the moving direction of the piston cylinder 2 is completely along the inner wall direction of the shell 1. On the other hand, the center of the elastic part 3 is provided with a hole matched with the step of the core print 5, so that the elastic part 3 firstly positions the elastic part 3 through the step of the core print 5, and then the elastic part 3 positions the piston cylinder 2, and the stability, the balance and the accuracy of the piston cylinder 2 during movement are ensured.

The utility model discloses be different from only through clearance fit's chuck among the prior art, the utility model discloses an elastic component 3 advances line location to the machining precision requirement of spare part to the motion of piston cylinder 2 is not high, even if there is some clearance between piston cylinder 2 and the shell 1, also can paste tightly under the elastic force effect. The processing difficulty of the chuck parts is reduced. And simultaneously, the utility model discloses it is higher still to make the precision cooperation between shell 1 and the piston cylinder 2 through elastic component 3 in the chuck use. The technical scheme of the utility model the diameter that can make the chuck accomplishes more than 150 millimeters, makes the chuck guarantee in zero clearance fit that piston cylinder 2 is difficult to produce the dead or condition of rocking of card in shell 1.

Example 2:

preferably, to better implement the present invention, further optimization is performed on the basis of the above embodiments, and the following arrangement structure is particularly adopted:

as shown in fig. 1 to 4, the elastic element 3 is provided with a notch at a position close to the side wall of the piston cylinder 2, and a non-closed annular metal ring 4 is arranged in the notch. The material of metal ring 4 is preferably the same as the material of piston cylinder 2, and metal ring 4 can improve the wearability between piston cylinder 2 and the elastic component 3, and annular metal ring 4 of non-closure can outwards be out of shape under the effect of elastic component 3 and closely laminate with the inner wall of shell 1, when improving the wearability, makes the lateral wall of piston cylinder 2 hug closely the lateral wall of shell 1, guarantees the no clearance fit between piston cylinder 2 and the shell 1.

As shown in fig. 1 to 4, the outer shell 1 and the piston cylinder 2 are provided with a sealing ring 10 at the central column position of the core print 5, the sealing ring 10 is also provided between the piston cylinder 2 and the outer shell 1, and the sealing ring 10 is also provided between the elastic element 3 and the inner wall of the piston cylinder 2. To ensure the tightness of the medium (gas or liquid).

As shown in fig. 1 to 4, the elastic member 3 is further provided with an oil groove for filling the side wall of the piston cylinder 2 with lubricating oil. To facilitate movement of the piston cylinder 2 within the housing 1.

Example 3:

as shown in fig. 1 to 4, the bottom of the piston cylinder 2 has a complete circular ring-shaped wedge 21, and the opening direction of the wedge 21 faces the outside of the piston cylinder 2 to form a horn-shaped structure. The base 6 is provided with a limiting groove 61 which has a limiting effect on the movement of the wedge-shaped opening 21, namely the width of the limiting groove 61 is the same as the thickness of the side wall of the piston cylinder 2. The base 6 is also connected with a slide block 7, the slide block 7 is provided with a wedge-shaped groove 71 matched with the shape of the opening of the wedge-shaped opening 21, three groups of the slide block 7 are evenly distributed on the base 6, and the surface of the slide block 7 is flush with the surface of the base 6. The limiting groove 61 and the wedge-shaped groove 71 are enclosed to form a complete circular ring groove structure, the circular ring groove structure corresponds to the circular ring structure of the wedge-shaped opening 21, and the wedge-shaped opening 21 is matched with the wedge-shaped groove 71 to drive the sliding block 7 to move on the base 6 while moving in the limiting groove 61.

As shown in fig. 1 to 4, a T-shaped groove is formed in the slider 7, a T-shaped slider 8 is arranged in the T-shaped groove, threaded holes corresponding to the T-shaped slider 8 and the clamping jaws 9 are formed in the T-shaped slider 8 and the clamping jaws 9, and the clamping jaws 9 are fixedly connected with the T-shaped slider 8 through bolts. Meanwhile, the contact surfaces of the T-shaped sliding block 8 and the clamping jaws 9 are respectively provided with a rack surface, and the T-shaped sliding block 8 and the clamping jaws 9 are also in meshed connection through the rack surfaces. The bottom surface of the base 6 is marked with scales so as to facilitate the positioning of the clamping jaws 9.

When a workpiece needs to be clamped, firstly, a bolt between the T-shaped sliding block 8 and the clamping jaw 9 is loosened, and then the clamping jaw 9 is adjusted to a position which is preliminarily suitable for the diameter of the workpiece through scales, so that the clamping jaw 9 preliminarily clamps the workpiece. The piston cylinder 2 is then controlled in its displacement by the filling medium (gas or liquid) so that the jaws 9 completely grip and fix the workpiece. As shown in figure 1, when the piston cylinder 2 is pressed downwards, the wedge-shaped opening 21 gradually extends into the base 6, the clamping jaw 9 clamps the workpiece to enable the wedge-shaped opening 21 to move outwards, and the rest wedge-shaped openings 21 which are concentric with the wedge-shaped opening 21 at the wedge-shaped groove 71 move inwards at the moment to hold the inner side wall of the limiting groove 61 tightly.

Example 4:

most of the technical solutions of the present embodiment are the same as those of the above embodiment, but the following arrangement structure is particularly adopted:

as shown in fig. 5, the bottom of the piston cylinder 2 has a complete circular ring-shaped wedge 21, and the opening direction of the wedge 21 is toward the inner side of the piston cylinder 2 to form an inverse horn-shaped structure. When the piston cylinder 2 is jacked upwards, the wedge-shaped opening 21 gradually extends out of the base 6, the clamping jaw 9 clamps the workpiece to enable the wedge-shaped opening 21 to move inwards, and the rest wedge-shaped openings 21 which are concentric with the wedge-shaped opening 21 at the wedge-shaped groove 71 move outwards at the moment, so that the outer side wall of the limiting groove 61 is tightly supported.

The utility model discloses the bottom of piston cylinder 2 is complete annular wedge mouth 21, after jack catch 9 presss from both sides tight work piece atress, jack catch 9 drives the wedge mouth 21 that slider 7 made the wedge groove 71 position and produces small deformation, the bottom of piston cylinder 2 is out of shape for the shape of non-ring under three slider 7 efforts of group this moment, thereby make piston cylinder 2 directly hold tightly or prop tightly on base 6, and hold the center of resultant force tightly and the center coincidence of chuck, make the chuck reach the stress balance state, the location of piston cylinder 2 between shell 1 and core print 6 has been reinforceed.

To sum up, the utility model discloses a rely on cooperation location, elastic component 3 between the center post of centre bore and core print 5 of piston cylinder 2 to rely on hole and post to make the lateral wall of piston cylinder 2 be located between shell 1 and core print 5, the bottom of piston cylinder 2 relies on the deformation after the atress to hold tightly on base 6 and slider 7, and the equilibrium force of three position is fixed a position piston cylinder 2, has avoided the clearance between each spare part of chuck, the utility model discloses can make the diameter of chuck do and be greater than 150 millimeters to can not cause the chuck card to die or rock.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an elasticity locate mode gas-liquid chuck, its characterized in that includes shell (1), piston cylinder (2), core print (5) and base (6), be provided with elastic component (3) between piston cylinder (2) and core print (5), make the lateral wall of piston cylinder (2) be located between shell (1) and core print (5) under the elastic action, the bottom of base (6) is connected with jack catch (9) that are used for pressing from both sides tight work piece.

2. The resiliently positioning type gas-liquid chuck as claimed in claim 1, wherein the cartridge holder (5) has a stepped structure such that the cartridge holder (5) and the piston cylinder (2) form a chamber at a stepped position, and the elastic member (3) is installed in the chamber.

3. The elastically positioned gas-liquid chuck according to claim 2, wherein the elastic member (3) is provided with a notch at a position close to the side wall of the piston cylinder (2), and the notch is provided with a non-closed annular metal ring (4).

4. The elastically positioned gas-liquid chuck according to claim 3, wherein an oil groove for filling lubricating oil is further provided at a position of the elastic member (3) close to the side wall of the piston cylinder (2).

5. The elastic positioning type gas-liquid chuck according to claim 4, wherein the elastic member (3) is made of nylon, rubber, silica gel, cowhells or hollow metal.

6. The elastic force positioning type gas-liquid chuck according to claim 1, wherein the bottom of the piston cylinder (2) is provided with a complete circular-ring-shaped wedge-shaped opening (21), a limiting groove (61) which limits the movement of the wedge-shaped opening (21) is arranged on the base (6), the base (6) is further connected with a sliding block (7) with a wedge-shaped groove (71), the limiting groove (61) and the wedge-shaped groove (71) form a complete circular-ring-shaped groove structure corresponding to the wedge-shaped opening (21), and the wedge-shaped opening (21) is matched with the wedge-shaped groove (71) to drive the sliding block (7) to move on the base (6) while moving in the limiting groove (61).

7. The elastic positioning type gas-liquid chuck according to claim 6, wherein a T-shaped groove is formed in the sliding block (7), a T-shaped sliding block (8) is arranged in the T-shaped groove, threaded holes corresponding to the T-shaped sliding block (8) and the clamping jaws (9) are formed in the T-shaped sliding block (8) and the clamping jaws (9), and the clamping jaws (9) are fixedly connected with the T-shaped sliding block (8) through bolts.

8. The elastic force positioning type gas-liquid chuck according to claim 7, wherein the contact surfaces of the T-shaped sliding block (8) and the clamping jaws (9) are respectively provided with a rack surface, and the T-shaped sliding block (8) and the clamping jaws (9) are also in meshed connection through the rack surfaces.

9. The elastic force positioning type gas-liquid chuck according to any one of claims 1 to 8, wherein a central column penetrating through the outer shell (1) is arranged on the core print (5), an a medium hole (51) and a b medium hole (52) are arranged on the central column, the a medium hole (51) is communicated between the outer shell (1) and the piston cylinder (2), and the b medium hole (52) is communicated between the piston cylinder (2) and the core print (5).

10. The elastically positioned gas-liquid chuck according to claim 9, wherein sealing rings (10) are disposed between the housing (1), the piston cylinder (2), the elastic member (3), and the core holder (5).