CN210172570U

CN210172570U - Three-jaw chuck

Info

Publication number: CN210172570U
Application number: CN201920889623.7U
Authority: CN
Inventors: Shandong Zhao; 赵善东
Original assignee: Shanghai Xieshun Machinery Parts Co Ltd
Current assignee: Shanghai Xieshun Machinery Parts Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-03-24
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a three-jaw chuck, include: a chuck body; the clamping device comprises a chuck body, three clamping jaws and a clamping part, wherein the chuck body is uniformly distributed along the circumference, the clamping jaws can move along the radial direction of the chuck body, the clamping jaws are provided with a plurality of clamping parts arranged in a ladder way, each clamping part comprises a first clamping surface and a first top surface connected with the first clamping surface, and the first clamping surface has a first clamping thickness; the gasket is arranged on the first top surface of the at least one clamping part of the clamping jaw, the gasket protrudes upwards to the first top surface to form a second top surface, so that the at least one clamping part forms a second clamping surface, the second clamping surface has a second clamping thickness, and the second clamping thickness is smaller than the first clamping thickness. The utility model discloses can be on original basis the thinner product of centre gripping.

Description

Three-jaw chuck

Technical Field

The utility model relates to an anchor clamps especially indicate a three-jaw chuck.

Background

Three-jaw chuck, also known as three-jaw self-centering chuck, is usually used as a machine tool accessory, and utilizes the radial movement of three jaws uniformly distributed on the chuck body to clamp and position a workpiece, and can determine the rotation center of the workpiece according to the circumference of the workpiece clamping part.

The clamping size of the clamping jaws of the existing three-jaw chuck is fixed, and only a product with a certain thickness can be clamped. If some thin workpieces need to be processed, the thickness of the workpieces is smaller than the clamping thickness of the clamping jaws, the clamping jaws can only be replaced under the condition, otherwise, the workpieces cannot protrude out of the surfaces of the clamping jaws to cause that the workpieces cannot be processed, or the clamping is easy to be unstable or larger clamping errors are generated, and the use is very inconvenient.

Therefore, there is a need for a new type of three-jaw chuck to solve the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three-jaw chuck can be on original basis the thinner product of centre gripping.

To the above purpose, the utility model adopts the following technical scheme:

a three-jaw chuck comprising: a chuck body; the clamping device comprises a chuck body, three clamping jaws and a clamping mechanism, wherein the chuck body is circumferentially and uniformly distributed on the chuck body, the clamping jaws can move along the radial direction of the chuck body, the clamping jaws are provided with a plurality of clamping parts arranged in a ladder way, each clamping part comprises a first clamping surface and a first top surface connected with the first clamping surface, and the first clamping surface has a first clamping thickness; the gasket is arranged on the first top surface of at least one clamping part of the clamping jaw, the gasket protrudes upwards to form a second top surface so that at least one clamping part forms a second clamping surface, the second clamping surface has a second clamping thickness, and the second clamping thickness is smaller than the first clamping thickness.

Further, the gasket is fixed to the retaining portion by a fastener.

Further, a first fastening hole is formed in the center of the gasket, a second fastening hole matched with the first fastening hole is formed in the clamping portion, and the gasket is fixed through the first fastening hole and the second fastening hole by the fastening piece.

Further, an upper surface of the fastener is not higher than an upper surface of the spacer.

Further, the upper surfaces of at least three of the spacers are flush.

Further, the gasket is a round gasket or a square gasket.

Further, the gasket has a third clamping surface having a third clamping thickness that is less than the first clamping thickness.

Further, the third clamping surface is in a concave arc shape.

Further, the centers of the three shims are located on the same circle.

In order to achieve the above object, the utility model discloses can also adopt following technical scheme:

a three-jaw chuck comprising: a chuck body; the clamping device comprises a chuck body, three clamping jaws and a clamping mechanism, wherein the chuck body is circumferentially and uniformly distributed on the chuck body, the clamping jaws can move along the radial direction of the chuck body, the clamping jaws are provided with a plurality of clamping parts arranged in a ladder way, each clamping part comprises a first clamping surface and a first top surface connected with the first clamping surface, and the first clamping surface has a first clamping thickness; the gasket is arranged on at least one first top surface of the clamping part, the gasket protrudes upwards to form a second top surface from the first top surface, the gasket is provided with a third clamping surface, the third clamping surface is provided with a third clamping thickness, and the third clamping thickness is smaller than the first clamping thickness.

Compared with the prior art, the beneficial effects of the utility model are that: the gasket is arranged on the first top surface, so that thinner workpieces can be placed on the second top surface of the gasket, the clamping part forms a second clamping surface, the second clamping thickness of the second clamping surface is smaller than the original first clamping thickness of the clamping part, and the second clamping surface can better clamp the workpieces. In addition, the workpiece can also be placed on the first top surface where the gasket is located, the gasket can also form a third clamping surface, and the third clamping thickness of the third clamping surface is also smaller than the first clamping thickness, so that the third clamping surface can better clamp the workpieces. Therefore, the three-jaw chuck can be used more conveniently, and workpieces with different thicknesses can be clamped without replacing the clamping jaws.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

fig. 2 is a front view of an embodiment of the present invention;

fig. 3 is a top view of an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a perspective view of a clamping member according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a workpiece held in accordance with an embodiment of the present invention;

fig. 8 is a top view of another embodiment of the present invention;

fig. 9 is a partial cross-sectional view of another embodiment of the present invention clamping a workpiece.

Detailed Description

For the purpose of promoting a better understanding of the objects, structures, features, and functions of the invention, reference should now be made to the drawings and detailed description of the invention. It should be noted that the features illustrated in the drawings are not necessarily drawn to scale. Moreover, the described embodiments are only some of the described embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", "front", "rear", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 7, an embodiment of the present invention provides a three-jaw chuck 100, which includes a chuck body 1, three jaws 2 uniformly distributed on the chuck body 1, and at least three gaskets 3 respectively disposed on the three jaws 2.

Chuck body 1 is cylindrical, and chuck body 1 corresponds jack catch 2 and is equipped with movable groove 11 and supplies jack catch 2 to fix a position when removing.

The jaws 2 are radially movable along the chuck body 1. The jaws 2 are driven by a jaw driving mechanism (not shown) and radially move along the moving grooves 11, which is prior art and will not be described herein. The claw 2 is provided with a plurality of clamping parts 21 which are arranged in a ladder way so as to respectively clamp workpieces with different sizes correspondingly. The clamping part 21 comprises a first clamping surface 211 and a first top surface 212 connected with the first clamping surface 211, the first clamping surface 211 has a first clamping thickness H1, i.e. each clamping part 21 has a first clamping thickness H1, the first clamping thicknesses H1 of different clamping parts 21 of the same jaw 2 are not necessarily the same, but the first clamping thicknesses H1 of the clamping parts 21 of different jaws 2 at the same position (i.e. the same height) are the same.

The gaskets 3 are arranged on the first top surface 212 of at least one of the clamping parts 21 of the jaws 2, in this embodiment, three gaskets 3 are arranged, and the gaskets 3 are arranged on the first top surface 212 of one of the clamping parts 21 of the jaws 2. In other embodiments, there may be a plurality of spacers 3, for example, 6 spacers, so that the spacers 3 may be disposed on the first top surfaces 212 of the two retainers 21 of the claws 2. The number of shims 3 may be increased by a factor of 3, as desired.

The spacer 3 protrudes upward from the first top surface 212 to form the second top surface 32 such that the at least one retaining portion 21 forms the second retaining surface 213, the second retaining surface 213 has a second retaining thickness H2, and the second retaining thickness H2 is smaller than the first retaining thickness H1. By providing the spacer 3 on the first top surface 212, the spacer 3 suitably reduces the thickness of the first retaining thickness H1, and the thinner workpiece 200 can be placed on the second top surface 32 of the spacer 3, so that the second retaining surface 32 can better retain the workpiece 200, and the workpiece 200 can protrude out of the top surface of the retaining portion 21 under the action of the spacer 3 to facilitate the processing of the end surface of the workpiece 200. The second clamping thickness H2 can be increased or decreased as appropriate according to actual conditions, so as to ensure that different workpieces with smaller thickness can be clamped. Therefore, the three-jaw chuck 100 can be used more conveniently, and workpieces with different thicknesses can be clamped without replacing the jaws 2.

In this embodiment, the claw 2 has three retaining portions 21, and the gasket 3 is disposed on one of the retaining portions 21. The clamping parts 21 are respectively a first clamping part, a second clamping part and a third clamping part from top to bottom, and the gasket 3 is arranged on the first top surface 212 of the second clamping part. The contour of the spacer 3 is completely located on the first top surface 212, i.e. the spacer 3 does not laterally protrude from the first top surface 212, which facilitates the mounting of the spacer 3 and also protects the spacer 3 from being easily damaged.

In some embodiments, the spacer 3 is secured to the catch 21 by the fastener 4 so that the spacer 3 can be removed for easy adjustment and replacement. The fastener 4 may be a screw or bolt, etc.

In some embodiments, the center of the gasket 3 is provided with a first fastening hole 33, the holder 21 is provided with a second fastening hole 214 fitted to the first fastening hole 33, and the fastening member 4 fixes the gasket 3 through the first and

second fastening holes

33 and 214.

In some embodiments, the upper surface of the fastener 4 is not higher than the upper surface of the spacer 3 to ensure that the workpiece can be smoothly placed on the spacer 3.

In some embodiments, the upper surfaces of at least three shims 3 are flush to ensure a smooth placement of the workpiece 200.

In some embodiments, the shim 3 is a round shim or a square shim.

As shown in fig. 9, in some embodiments, the spacer 3 has a third clamping surface 31, the third clamping surface 31 has a third clamping thickness H3, and the third clamping thickness H3 is less than the first clamping thickness H1. Therefore, some thin workpieces 200 can be placed on the first top surface 212 where the pad 3 is located, and the workpieces 200 can be clamped by the pad 3, so that the third clamping surface 31 can better clamp the workpieces 200. In operation, the pad 3 moves radially with the jaws 2 and is in close contact with the workpiece via the third clamping surface 31, thereby clamping the workpiece.

The utility model discloses both can hold face 213 and carry out the centre gripping to thinner work piece through the second card of card portion 21, also can carry out the centre gripping to thinner work piece through the third card holding surface 31 of gasket 3. In the present embodiment, if the clamping is performed by the second clamping surface 213, the gasket 3 cannot be disposed at the first clamping portion, but if the clamping is performed by the third clamping surface 31, the gasket 3 may be disposed at any clamping portion.

As shown in fig. 8, in some embodiments, the third clamping surface 31 is concavely curved.

In some embodiments, the centers of the three pads 3 are located on the same circle to ensure a centered clamping of the workpiece 200, such that the center of the workpiece 200 is consistent with the center of the chuck body 1.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all the equivalent technical changes using the description and drawings of the present invention are included in the scope of the present invention.

Claims

1. A three-jaw chuck, comprising:

a chuck body;

the clamping device comprises a chuck body, three clamping jaws and a clamping mechanism, wherein the chuck body is circumferentially and uniformly distributed on the chuck body, the clamping jaws can move along the radial direction of the chuck body, the clamping jaws are provided with a plurality of clamping parts arranged in a ladder way, each clamping part comprises a first clamping surface and a first top surface connected with the first clamping surface, and the first clamping surface has a first clamping thickness;

the gasket is arranged on the first top surface of at least one clamping part of the clamping jaw, the gasket protrudes upwards to form a second top surface so that at least one clamping part forms a second clamping surface, the second clamping surface has a second clamping thickness, and the second clamping thickness is smaller than the first clamping thickness.

2. The three-jaw chuck according to claim 1, wherein: the gasket is fixed to the retaining part through a fastener.

3. The three-jaw chuck according to claim 2, wherein: the gasket is characterized in that a first fastening hole is formed in the center of the gasket, a second fastening hole matched with the first fastening hole is formed in the clamping portion, and the gasket is fixed through the first fastening hole and the second fastening hole by the fastening piece.

4. The three-jaw chuck according to claim 2, wherein: the upper surface of the fastener is no higher than the upper surface of the shim.

5. The three-jaw chuck according to claim 1, wherein: the upper surfaces of at least three of the gaskets are flush.

6. The three-jaw chuck according to claim 1, wherein: the gasket is a round gasket or a square gasket.

7. The three-jaw chuck according to claim 1, wherein: the gasket has a third clamping surface with a third clamping thickness that is less than the first clamping thickness.

8. The three-jaw chuck according to claim 7, wherein: the third clamping surface is in a concave arc shape.

9. The three-jaw chuck according to claim 7, wherein: the centers of the three gaskets are positioned on the same circle.

10. A three-jaw chuck, comprising:

a chuck body;

the gasket is arranged on at least one first top surface of the clamping part, the gasket protrudes upwards to form a second top surface from the first top surface, the gasket is provided with a third clamping surface, the third clamping surface is provided with a third clamping thickness, and the third clamping thickness is smaller than the first clamping thickness.