CN218592372U

CN218592372U - Spring chuck

Info

Publication number: CN218592372U
Application number: CN202222861804.3U
Authority: CN
Inventors: 刘跃文
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-10
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a processing anchor clamps, in particular to collet chuck has solved collet chuck's clamping structure problem. The chuck body is of an annular cylindrical structure and is uniformly arranged along the circumferential direction by four chuck units, an expansion spring is arranged on the inner side of the chuck body and has a tendency of radial elastic expansion along the chuck body, a slope line is arranged on the outer wall of the chuck body, and the diameter of the chuck body is gradually reduced from the slope line to two ends. Simple structure, design benefit utilize split type structure to combine the expansion capability of elastic component to widen application range, and stable in utilization is favorable to the centre gripping processing of jumbo size work piece, improves the availability factor, reduces anchor clamps use cost simultaneously.

Description

Spring chuck

Technical Field

The utility model relates to a processing anchor clamps, in particular to collet chuck.

Background

The spring chuck is used as a workpiece clamp and is matched with a chuck positioner for common use, and the positioner is directly arranged on a machine tool and is a matched component of the spring chuck. The spring chuck is very suitable for processing small-diameter workpieces; the time for clamping the workpiece by the spring chuck is short, and quick feeding and discharging can be realized; the replacement time of the spring chuck is short, and the clamps with different sizes can be replaced quickly; compared with a chuck, the spring chuck has higher clamping precision and better concentricity maintenance during turning; for the special-shaped and boring type spring chuck, the special-shaped and boring type spring chuck saves more cost and has higher flexibility than a chuck; on the machine tool with the internal spindle structure, the spring chuck can provide the shortest cutting force arm, so that the machining space and the machining rigidity are larger than those of a chuck.

The spring chuck is an enveloping type clamping, can better protect the surface of a workpiece when clamping, and provides the maximum cutting torque. In the processing occasion of many varieties small lot, spring chuck's advantage lies in changing anchor clamps time, and the time of standard jaw formula chuck change jack catch is about 15 to 20 minutes, and the special jaw chuck that can be used for quick replacement also needs at least 1 minute time to change, and the spring chuck that can be used for quick replacement changes the chuck part and only needs 15 to 20 seconds, and when the product of processing changes frequently, the time of saving is accumulated up and is considerable. In the case of high-volume machining, the cumulative time of the clamping process can be saved as well, the time required for opening and closing the collet chuck is shorter than that of a claw chuck, and the total cumulative time of the whole machining process is reduced by reducing the non-cutting time for changing from one workpiece to the next.

The spring chuck has a plurality of advantages, and the disadvantage is obvious, namely the application range is narrow, and the spring chuck can only meet the use of workpieces with limited specifications. In addition, the traditional product is suitable for processing small-size workpieces, so that the large-size workpieces are processed by relying on more clamping jaws and clamping chucks, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

Not enough to current technique, the utility model provides a collet chuck.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a collet chuck, includes the chuck body of cooperation chuck locator installation, the chuck body is ring column shape structure, and the chuck body by four chuck units along circumference align to grid, chuck body inboard is equipped with expansion spring, expansion spring has the trend along the radial elasticity expansion of chuck body, the slope line has on the chuck body outer wall, chuck body diameter diminishes to both ends by the slope line gradually.

The expansion spring and the chuck body are overlapped in axis, and a positioning groove for installing the expansion spring is formed in the inner side wall of the chuck body.

The locating slot is an annular slot, and the locating slot is provided with at least two positions at two sides of the slope line of the chuck body.

The slope line coincides with the symmetrical center line of the chuck body.

The middle projection of the outer contour of the chuck body in the radial direction is in a circular arc shape with a central angle larger than 120 degrees.

The utility model has the advantages that: the utility model provides a spring chuck simple structure, design benefit utilize split type structure to combine the expansion ability of elastic component to widen application range, and stable centre gripping processing that is favorable to jumbo size work piece is used to the structure simultaneously, improves availability factor, reduces anchor clamps use cost.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic view of the split structure of the present invention.

Detailed Description

As shown in fig. 1-2, a collet chuck comprises a chuck body 1 installed in cooperation with a chuck positioner, wherein the chuck body 1 is of an annular cylindrical structure, and the chuck body 1 is formed by four chuck units 2 which are uniformly arranged along the circumferential direction. The traditional products are all of an integrated structure, and one end of each traditional product is provided with a fork groove, so that the design adopts a split structure to match with an elastic piece, and the specification or size range of the applicable workpiece is greatly widened. The expansion spring is arranged on the inner side of the chuck body 1 and has a tendency of elastic expansion along the radial direction of the chuck body 1. It should be noted that the spacing of the collet units 2 will vary during expansion, and it is generally sufficient to provide guides on the collet locator, which is a well established technique. The outer wall of the chuck body 1 is provided with a slope line 3, and the diameter of the chuck body 1 is gradually reduced from the slope line 3 to two ends. The slope line 3 is designed to be arranged on the positioner, and plays a role in fixing and positioning through the position of the slope line 3, namely, the design effect is achieved by surface fitting through the bulge at the slope line 3, and the design effect is not explained and limited too much.

The axis between expanding spring and chuck body 1 coincides mutually, be equipped with the constant head tank 4 that supplies the expanding spring installation on the chuck body 1 inside wall. The expansion spring is installed in a hidden mode, and clamping use of a workpiece is not affected. The positioning groove 4 is an annular groove, and the positioning groove 4 is at least provided with two positions on two sides of the slope line 3 of the chuck body 1, so that the use stability is facilitated.

The slope line 3 coincides with the symmetrical center line of the chuck body 1, and front and back adjustment is not needed when the chuck is installed in a front and back symmetrical mode. The middle projection of the outer contour of the chuck body 1 in the radial direction is in a circular arc shape with a central angle larger than 120 degrees, and the circular arc shape is relatively gentle and does not cause obvious deviation and shaking.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for convenience of description, and are not intended to indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and therefore, are not to be considered as limitations of the present invention, and the fundamental principles, main features, and advantages of the present invention have been shown and described above, as would be understood by those skilled in the art.

Claims

1. The utility model provides a collet chuck, includes the chuck body of cooperation chuck locator installation, its characterized in that, the chuck body is the ring column structure, and the chuck body by four chuck units along circumference align to grid, the chuck body inboard is equipped with expansion spring, expansion spring has the trend along the radial elasticity expansion of chuck body, the slope line has on the chuck body outer wall, chuck body diameter diminishes to both ends by the slope line gradually.

2. A collet as defined in claim 1, wherein the expansion spring is axially aligned with the collet body, and wherein the inner wall of the collet body defines a detent for receiving the expansion spring.

3. A collet as defined in claim 2, wherein the detent groove is an annular groove and the detent groove is provided in at least two locations on either side of the ramp line of the collet body.

4. A collet chuck according to claim 2 or claim 3, wherein said slope is coincident with the centerline of symmetry of the chuck body.

5. The collet according to claim 4, wherein the projection of the middle of the outer profile of the collet body in the radial direction is in the shape of a circular arc having a central angle greater than 120 °.