CN219254174U

CN219254174U - Claw and chuck

Info

Publication number: CN219254174U
Application number: CN202320579124.4U
Authority: CN
Inventors: 刘坤; 姜海涛; 孙乐正
Original assignee: SAIC Automotive Transmission Shandong Co Ltd
Current assignee: SAIC Automotive Transmission Shandong Co Ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-06-27
Anticipated expiration: 2033-03-20

Abstract

The utility model relates to a clamping jaw and a chuck, and belongs to the technical field of clamping jaws. The claw comprises a claw body, a step is arranged on the claw body and is provided with a first kicking surface and a second kicking surface, the first kicking surface is a main positioning surface and further comprises an auxiliary positioning part, the auxiliary positioning part is provided with an auxiliary positioning surface, and the auxiliary positioning part is connected to the second kicking surface through an elastic element. The chuck comprises a chassis and a plurality of claw seats, wherein the claw seats are uniformly distributed on the chassis in circumference, and each claw seat is provided with one claw. Through the auxiliary clamping part on the clamping jaw, the clamping strength of the part can be increased, the part is clamped stably, the vibration problem in the part machining process is avoided, and the machining precision of the part is ensured.

Description

Claw and chuck

Technical Field

The utility model relates to a clamping jaw and a chuck, and belongs to the technical field of clamping jaws.

Background

The clamping jaw clamping mode is a part clamping mode commonly used in the machining field. Under the conventional condition, if the clamped area of the part is enough, the self weight of the part can be overcome by the clamping force under certain clamping strength, so that good clamping effect is ensured, and the situations of vibration and the like of the part can not occur in the processing process. However, if the area of the clamped surface of the part is too small, the clamping force is insufficient to overcome the dead weight of the part under the condition of ensuring that the part is not clamped, the vibration of the part during the machining process can occur, and the machining precision of the part cannot be ensured.

For example, the workpiece to be clamped is a driven pulley in a CVT (Continuously Variable Transmission) transmission, the CVT transmission is also called a continuously variable transmission, the driven pulley is a key part of the CVT transmission, the part has the characteristics of heavy dead weight of the part, too small clamping area of the clamped part during conical grinding, incapability of clamping other outer circular parts of the part due to blank surfaces, and the like, as shown in fig. 7, the driven pulley is a structural schematic diagram of the driven pulley, and comprises a main clamped surface 9, as shown in fig. 5 and 6, the driven pulley is a structural schematic diagram of the existing clamping jaw, and comprises a clamping jaw body, a step is arranged on the clamping jaw body, the step is provided with a first kicking surface 2 and a second kicking surface 3, when the driven pulley is clamped by the existing clamping jaw, the conventional clamping position of the driven pulley is the main clamped surface 9, the arc-shaped positioning surface of the clamping jaw abuts against the main clamped surface 9 to clamp the driven pulley, the clamping mode is as shown in fig. 8, the main clamped surface 9 is small, the clamping force is used for clamping the part under the condition of ensuring that the part is not damaged, the workpiece is clamped by the maximum clamping force, the problem of the workpiece is caused in the process of high-quality grinding, and the problem of the workpiece is caused after the workpiece is high in the process of vibration.

Disclosure of Invention

The present utility model aims to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

The technical scheme provided by the utility model is as follows: the utility model provides a jack catch, includes the jack catch body, be equipped with the step on the jack catch body, the step has first face and the second of playing, first face of playing is the main locating surface, still includes auxiliary positioning portion, be equipped with auxiliary positioning face on the auxiliary positioning portion, auxiliary positioning portion passes through elastic element and connects on the second is played the face.

Further, the elastic element is a spring piece, one end of the spring piece is a free end, the other end of the spring piece is fixed on the second kicking surface, an opening is arranged between the spring piece and the second kicking surface, and the auxiliary positioning part is installed on the spring piece near the free end.

The adoption of the method has the further beneficial effects that: the opening is an elastic space of the spring piece, and elasticity of the spring piece can be guaranteed.

Further, a fixing seat for fixing the auxiliary positioning part is arranged on the spring piece, and the auxiliary positioning part is arranged on the fixing seat.

Further, the fixing seat and the spring piece are of an integrated structure, and the fixing seat is a boss positioned on the spring piece.

Further, the spring piece is made of spring steel.

Further, the main positioning surface is arc-shaped concave.

The adoption of the method has the further beneficial effects that: the shape of the main locating surface is matched with the shape of the main clamped surface of the clamped workpiece.

Further, the auxiliary positioning surface is arc-shaped concave.

The adoption of the method has the further beneficial effects that: the shape of the auxiliary positioning surface is matched with the shape of the auxiliary clamped surface of the clamped workpiece.

Further, the spring piece, the auxiliary positioning part and the claw body are of an integrated structure.

The chuck comprises a chassis and a plurality of claw seats, wherein the claw seats are uniformly distributed on the chassis in circumference, and the chuck is characterized in that each claw seat is provided with one claw.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: the clamping jaw is additionally provided with the auxiliary clamping locating surface on the basis of the original clamping locating surface and is used for clamping certain parts with auxiliary clamping parts, the auxiliary clamping parts are arranged on the second kicking surface through the elastic elements, the elasticity between the clamping jaw and the part to be clamped can be kept, and the elastic design enables the parts not to be clamped in a positioning mode in the clamping process. Therefore, through the auxiliary clamping part on the clamping jaw, the clamping strength of the part can be increased, the part is clamped stably, the vibration problem in the part machining process is avoided, and the machining precision of the part is ensured.

Drawings

FIG. 1 is a front view of a pawl of the present utility model;

FIG. 2 is a B-B cross-sectional view of FIG. 1 in accordance with the present utility model;

FIG. 3 is an enlarged view of FIG. 2 at C in accordance with the present utility model;

FIG. 4 is a state diagram of the claw clamping the workpiece according to the present utility model;

FIG. 5 is a front view of a prior art pawl;

FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;

FIG. 7 is a schematic view of the structure of a clamped workpiece;

FIG. 8 is a state diagram of a conventional claw clamping a workpiece;

in the figure, 1, a claw body; 2. a first kick; 3. a second kick surface; 4. an auxiliary positioning part; 5. an auxiliary positioning surface; 6. an elastic element; 7. a fixing seat; 8. a clamped workpiece; 9. a main clamped surface; 10. auxiliary clamped surfaces; 11. an opening.

Detailed Description

The principles and features of the present utility model are described below in connection with examples, which are set forth only to illustrate the present utility model and not to limit the scope of the utility model.

As shown in fig. 1 to 3, a claw comprises a claw body 1, wherein a step is arranged on the claw body 1, the step is provided with a first kicking surface 2 and a second kicking surface 3, the first kicking surface 2 is a main positioning surface, the claw further comprises an auxiliary positioning part 4, an auxiliary positioning surface 5 is arranged on the auxiliary positioning part 4, and the auxiliary positioning part 4 is connected to the second kicking surface 3 through an elastic element 6.

The elastic element 6 is a spring piece, one end of the spring piece is a free end, the other end of the spring piece is fixed on the second kicking surface 3, an opening 11 is arranged between the spring piece and the second kicking surface 3, and the auxiliary positioning part 4 is installed on the spring piece near the free end. The spring piece is installed the one end of auxiliary positioning portion 4 is the free end, the spring piece with opening 11 between the second play face 3 is the elasticity space of spring piece can guarantee the elasticity of spring piece. The elastic design can ensure that the parts cannot be positioned and clamped excessively in the clamping process.

More specifically, the spring piece is provided with a fixing seat 7 for fixing the auxiliary positioning portion 4, and the auxiliary positioning portion 4 is mounted on the fixing seat 7. The fixing seat 7 and the spring piece are of an integrated structure, and the fixing seat 7 is a boss positioned on the spring piece. The spring piece is made of spring steel.

The main locating surface is arc concave, and the shape of the arc locating surface is matched with the shape of the main clamped surface 9 of the clamped workpiece 8. The auxiliary locating surface 5 is arc-shaped concave, and the shape of the auxiliary locating surface 5 is matched with the shape of the auxiliary clamped surface 10 of the clamped workpiece 8.

A chuck comprises a chassis and a plurality of claw seats, wherein the claw seats are uniformly distributed on the chassis in circumference, and each claw seat is provided with a claw.

As shown in fig. 7, the workpiece 8 to be clamped includes a main clamped surface 9 and an auxiliary clamped surface 10, and as shown in fig. 4, the method of clamping a workpiece using the chuck of the present utility model is as follows:

the main clamped surface 9 of the clamped workpiece 8 is close to the main positioning surface of the chuck and abuts against the main clamped surface 9 of the workpiece, and the auxiliary positioning surface 5 of the chuck abuts against the auxiliary clamped surface 10 of the workpiece, so that each jaw of the chuck can clamp the clamped workpiece 8 when moving towards the middle of the jaw disc.

The clamping jaw is additionally provided with the auxiliary clamping locating surface on the basis of the original clamping locating surface and is used for clamping certain parts with auxiliary clamping parts, the auxiliary clamping parts are arranged on the second kicking surface 3 through the elastic element 6, the elasticity between the clamping jaw and the part to be clamped can be kept, and the elastic design enables the parts not to be positioned and clamped in the clamping process. Therefore, through the auxiliary clamping part on the clamping jaw, the clamping strength of the part can be increased, the part is clamped stably, the vibration problem in the part machining process is avoided, and the machining precision of the part is ensured.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a jack catch, includes jack catch body (1), be equipped with the step on jack catch body (1), the step has first face (2) and second face (3) of playing, first face (2) of playing is the main locating surface, its characterized in that still includes auxiliary positioning portion (4), be equipped with auxiliary positioning face (5) on auxiliary positioning portion (4), auxiliary positioning portion (4) are connected on second face (3) of playing through elastic element (6).

2. The claw according to claim 1, characterized in that the elastic element (6) is a spring piece, one end of the spring piece is a free end, the other end of the spring piece is fixed on the second kicking surface (3), an opening (11) is arranged between the spring piece and the second kicking surface (3), and the auxiliary positioning part (4) is mounted on the spring piece near the free end.

3. The claw according to claim 2, characterized in that the spring plate is provided with a fixing seat (7) for fixing the auxiliary positioning part (4), and the auxiliary positioning part (4) is mounted on the fixing seat (7).

4. A jaw as claimed in claim 3, characterized in that the fixing seat (7) is of integral construction with the leaf spring, the fixing seat (7) being a boss located on the leaf spring.

5. A jaw according to any one of claims 2 to 3, wherein the spring plate is made of spring steel.

6. The pawl according to claim 1, wherein said main locating surface is arcuate concave.

7. A jaw as claimed in claim 1, characterized in that said auxiliary locating surface (5) is concave in the shape of an arc.

8. The claw according to claim 2, characterized in that the spring plate, the auxiliary positioning part (4) and the claw body (1) are of an integral structure.

9. A chuck comprising a chassis and a plurality of jaw seats, wherein a plurality of jaw seats are circumferentially and uniformly arranged on the chassis, and each jaw seat is provided with a jaw according to any one of claims 1 to 8.