CN215035501U

CN215035501U - Automatic centering excircle clamping device

Info

Publication number: CN215035501U
Application number: CN202120514172.6U
Authority: CN
Inventors: 王悦娟; 徐爱丽
Original assignee: Yto Luoyang Wit Tools & Equipments Co ltd
Current assignee: Yto Luoyang Wit Tools & Equipments Co ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-12-07
Anticipated expiration: 2031-03-11

Abstract

A self-centering cylindrical clamping device comprising: the oil cup, the bearing plate, the base, the stop pin, the spring, the pressing block, the cam, the handle and the baffle; the pressing block and the cam are placed on the base, the supporting plate is fixed on the base through screws, the stop pin penetrates through the supporting plate and the pressing block to be fixedly installed on the base, the baffle is installed on the base, and the handle penetrates through the cam to be inserted into the baffle. Three guide grooves are uniformly distributed in the circumferential direction on the base, and three pressing blocks are arranged in the guide grooves. A spring in a compressed state is arranged between the stop pin and the pressing block. Three sections of cam curves with the same lead are uniformly distributed on the inner circle of the cam. The utility model discloses can eliminate the positioning gap automatically, positioning accuracy is high, the tight rigidity of clamp is good, compact structure, easy and simple to handle. When the workpiece is clamped and released, the expansion and retraction of the self-centering mechanism can be realized simultaneously only by rotating the handle, and the clamping and releasing of the workpiece are completed simultaneously, so that the workpiece processing efficiency is improved, and the labor intensity of an operator is reduced.

Description

Automatic centering excircle clamping device

Technical Field

The utility model belongs to the machining field relates to a clamping device, especially relates to an automatic centering excircle clamping device.

Background

As is well known, when a workpiece is machined on a machine tool, the workpiece needs to be effectively clamped and positioned so as to be accurately and reliably machined. For a workpiece positioned in an outer circle, a positioning ring is generally used for positioning. However, since the workpiece is machined to have tolerance, a gap exists between the outer circle for positioning and the positioning ring, the positioning center inevitably generates an error, and positioning and clamping need two actions to be completed. In order to further improve the positioning accuracy and ensure the processing quality and accuracy, an automatic centering mechanism, such as a three-jaw chuck, is sometimes used for positioning and clamping. However, the three-jaw chuck has a complex structure and a large overall dimension, and is limited by the structure and the form, so that the requirement of workpiece processing is difficult to meet.

The utility model patent "pneumatic quick change excircle clamping device" that national intellectual property office 2012.01.18 authorizes, application date: 2011.05.17, patent application No.: 2011201555273, publication number: CN 202114494U. The pneumatic quick-change excircle clamping device comprises a cylindrical body, wherein an elastic quick-change sleeve and a clamping block are sleeved on the outer side of the body, the elastic quick-change sleeve is fixed with the body through a positioning pin, and a cavity between the elastic quick-change sleeve and the body is communicated with a compressed air source through an air supply system; the air supply system comprises an axial compressed air channel which is arranged at the center of the body and is communicated with a compressed air source along the axial direction, a joint is arranged on the body at the inner end of the axial compressed air channel, a plug is arranged at the outer end of the axial compressed air channel, a radial compressed air channel is arranged on the body along the radial direction, the inner end of the radial compressed air channel is communicated with the axial compressed air channel, and the outer end of the radial compressed air channel is communicated with a cavity between the elastic quick-change sleeve and the body. The utility model discloses a structure is comparatively complicated, needs to use compressed air just can change elasticity quick change cover, surely can not carry out self-centering simultaneously and press from both sides tightly.

Therefore, it is necessary to design a self-centering clamping device which can meet the positioning accuracy and the processing requirements, can perform self-centering and clamping simultaneously, and has the advantages of compact structure, convenient operation, and safe and reliable use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compact structure, convenient operation, use safe and reliable's self-centering excircle clamping device through turning handle, drives cam mechanism, promotes the briquetting along radial removal, conveniently realizes pressing from both sides tightly or relax the work piece.

In order to realize the above purpose, the utility model adopts the technical scheme that: a self-centering cylindrical clamping device comprising: the oil cup, the bearing plate, the base, the stop pin, the spring, the pressing block, the cam, the handle and the baffle; the pressing block and the cam are placed on the base, the supporting plate is fixed on the base through screws, the stop pin penetrates through the supporting plate and the pressing block to be fixedly installed on the base, the baffle is installed on the base, and the handle penetrates through the cam to be inserted into the baffle.

The base is provided with three guide grooves which are uniformly distributed in the circumferential direction, and the three pressing blocks are arranged in the guide grooves.

And a spring in a compressed state is arranged between the stop pin and the pressing block.

And three sections of cam curves with the same lead are uniformly distributed on the inner circle of the cam.

The utility model adopts the above technical scheme have following superiority: the utility model discloses can eliminate the positioning gap automatically, positioning accuracy is high, the tight rigidity of clamp is good, compact structure, easy and simple to handle. When the workpiece is clamped and released, the expansion and retraction of the self-centering mechanism can be realized simultaneously only by rotating the handle, and the clamping and releasing of the workpiece are completed simultaneously, so that the workpiece processing efficiency is improved, and the labor intensity of an operator is reduced.

Drawings

Fig. 1 is a schematic top view of the self-centering cylindrical clamping device of the present invention;

fig. 2 is a schematic view of the cross-sectional structure a-a of fig. 1.

In the figure: the oil cup comprises an oil cup 1, a bearing plate 2, a base 3, a stop pin 4, a spring 5, a press block 6, a cam 7, a handle 8 and a baffle 9.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples. As shown in fig. 1-2, a self-centering cylindrical clamping device includes: the oil cup comprises an oil cup 1, a supporting plate 2, a base 3, a stop pin 4, a spring 5, a pressing block 6, a cam 7, a handle 8 and a baffle 9; the pressing block 6 and the cam 7 are placed on the base 3, the bearing plate 2 is installed on the base 3 through screws, the stop pin 4 penetrates through the bearing plate 2 and the pressing block 6 and is fixedly installed on the base 3, the spring 5 in a compression state is installed between the stop pin 4 and the pressing block 6, the baffle 9 is installed on the base 3, the handle 8 penetrates through the cam 7 and is inserted into the baffle 9, three guide grooves are evenly distributed in the circumferential direction on the base 3, the three pressing blocks 6 are arranged in the guide grooves, and three sections of cam curves with the same lead are evenly distributed on the inner circle of the cam 7.

The working principle is as follows: when a workpiece is clamped, the handle 8 is rotated clockwise, the cambered surface at the tail part of the pressing block 6 is kept in contact with the cam 7, the cam 7 is driven to rotate around the center of the base 3 under the action of the spring force of the spring 5, and the three pressing blocks 6 are pushed to move towards the center along the guide grooves on the base 3 simultaneously so as to clamp the workpiece.

When the workpiece is loosened, the handle 8 is rotated anticlockwise, and the pressing block 6 moves backwards along the guide groove on the base 3 simultaneously under the action of the spring force of the spring 5, so that the workpiece is loosened.

Finally, it should be noted that: while the present invention has been described with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. All changes, modifications, equivalents and the like which come within the spirit of the invention are intended to be embraced therein.

Claims

1. A self-centering cylindrical clamping device comprising: the oil cup comprises an oil cup (1), a supporting plate (2), a base (3), a stop pin (4), a spring (5), a pressing block (6), a cam (7), a handle (8) and a baffle (9); the method is characterized in that: briquetting (6), cam (7) are placed on base (3), and bearing plate (2) passes through the fix with screw on base (3), and backing pin (4) pass bearing plate (2) and briquetting (6) fixed mounting on base (3), and baffle (9) are installed on base (3), and handle (8) pass cam (7) and insert in baffle (9).

2. A self-centering cylindrical clamping device as claimed in claim 1, wherein: three guide grooves are uniformly distributed in the circumferential direction on the base (3), and three pressing blocks (6) are arranged in the guide grooves.

3. A self-centering cylindrical clamping device as claimed in claim 1, wherein: and a spring (5) in a compressed state is arranged between the stop pin (4) and the pressing block (6).

4. A self-centering cylindrical clamping device as claimed in claim 1, wherein: cam curves with the same three-stage lead are uniformly distributed on the inner circle of the cam (7).