CN203109282U

CN203109282U - Spring collet

Info

Publication number: CN203109282U
Application number: CN 201320137024
Authority: CN
Inventors: 刘太恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-25
Filing date: 2013-03-25
Publication date: 2013-08-07
Anticipated expiration: 2023-03-25

Abstract

The utility model discloses a spring collet. The spring collet comprises a collet body. The axis position of the collet body is provided with a clamping hole. A plurality of contraction joints surrounding the clamping hole and extending in the axial direction are arranged on the collet body. The spring collet is characterized in that a chamfer is arranged at the joint edge of at least one contraction joint in manufactured mode, or a long-strip-shaped plane extending in the length direction of at least one contraction joint is formed in the joint edge of the at least one contraction joint through milling machining or grinding machining in a processing mode. The spring collet is easily deformed, contracted and clamped, clamping accuracy is high, and service life is long.

Description

Collet

Technical field

The utility model relates to a kind of anchor clamps, relates in particular to a kind of for the ER collet on the lathe.

Background technology

The ER collet is extensive use of at lathe, and it comprises the chuck body, and the shaft core position of chuck body is provided with axial clamping hole, also is provided with many on the chuck body and is trapped among outside the described clamping hole, axially extended shrinkage joint.During use, to be held parts (as milling cutter, drill bit etc.) penetrate as described in the clamping hole, by the force application part that is arranged on the collet outside collet is applied tightening force then, after collet is subjected to tightening force, the gap width of shrinkage joint diminishes, chuck body generation deformation, the aperture of clamping hole diminish and then will be held parts and steps up.

Yet, there is following shortcoming in this traditional ER collet: when chuck is subjected to the tightening force that outside force application part applies and the gap width of shrinkage joint is diminished, the gap width of shrinkage joint its seam in the process that diminishes relatively moves with respect to outside force application part along (being the sealing edge in slit), and the shrinkage joint seam is along being easy to card (compressing) externally on the force application part and increase the resistance that it moves when moving.So, on the one hand, the seam along and outside force application part between the structure that compresses the outside force application part of easy scuffing and chuck mutually, not only reduced and stepped up precision, also reduce chuck service life; On the other hand, having only this moment when outside force application part applies the tightening force that more strengthens to chuck to make the shrinkage joint seam mobile along continuing, that is to say, have only when outside force application part chuck is applied very large tightening force just to make the chuck deflection reach requirement make that the clamping hole aperture becomes enough little and will be held parts and step up.

Summary of the invention

The utility model purpose is: at the problems referred to above, the utility model provides the collet of a kind of easy deformation, clamping precision height, long service life, and this chuck can reduce the stressed interference that produces because of its distortion.

The utlity model has two kinds of technical schemes:

First kind of scheme, described collet, comprise that its shaft core position is provided with the chuck body of clamping hole, described chuck body is provided with some and is trapped among outside the described clamping hole, axially extended shrinkage joint, and the seam of at least one described shrinkage joint is shaped on chamfering along the place.

As preferably, the seam of all shrinkage joints is along locating all to be shaped on chamfering.

Second kind of scheme, described collet, comprise that its shaft core position is provided with the chuck body of clamping hole, described chuck body is provided with some and is trapped among outside the described clamping hole, axially extended shrinkage joint, and the seam of at least one described shrinkage joint is along locating through milling or grinding processing and handle and form a strip plane of extending along this shrinkage joint length direction.

The seam of all shrinkage joints mills or grinds processing and handle and form the strip plane of extending along the shrinkage joint length direction along locating all to pass through.

The utility model has the advantages that: collet of the present utility model has carried out chamfering or has polished processing at the seam of shrinkage joint along the place, when chuck takes place in the process of deformation in use, the seam of its shrinkage joint is along just being not easy to be stuck on the outside force application part, thereby avoided the mechanically stressed interference between seam edge and outside force application part, do not improved the chucking power of chuck, the chuck distortion is more prone to, has also increased the service life of chuck, improved service precision.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is the front view of the utility model embodiment one medi-spring chuck;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the A portion enlarged drawing of Fig. 2;

Fig. 4 is the front view of the utility model embodiment two medi-spring chucks;

Fig. 5 is the vertical view of Fig. 4;

Fig. 6 is the B portion enlarged drawing of Fig. 5;

Wherein: 1-chuck body, 2-clamping hole, 3-shrinkage joint, 4-chamfering, 5-strip plane.

The specific embodiment

Embodiment one:

As Fig. 1, Fig. 2 and shown in Figure 3, the collet of present embodiment, comprise chuck body 1, the shaft core position of this chuck body 1 is provided with axial clamping hole 2, also be provided with some on this chuck basis 1 and be trapped among described clamping hole 2 outer, axially extended shrinkage joints 3, and the seam of every shrinkage joint 3 all is shaped on chamfering 4 along locating (position of p indication among Fig. 1).

Because the design of chamfering 4 when chuck takes place in the process of deformation in use, just can avoid the seam of its shrinkage joint to disturb along the machinery with outside force application part, has not only reduced the deformation drag of chuck, has also increased the service life of chuck.Certainly, we also can be only be shaped on chamfering 4 at the seam of a part of shrinkage joint 3 along the place, can reduce the deformation drag of chuck equally, increase the service life of chuck, but effect are a bit weaker.

Embodiment two:

As Fig. 4, Fig. 5 and shown in Figure 6, the collet of present embodiment, comprise chuck body 1, the shaft core position of this chuck body 1 is provided with axial clamping hole 2, also be provided with some on this chuck basis 1 and be trapped among described clamping hole 2 outer, axially extended shrinkage joints 3, and the seam of each bar shrinkage joint 3 mills processing and handles back (or mill processing is handled) and form a strip plane 5 of extending along shrinkage joint 3 length directions along locating all to pass through, and this strip plane 5 is perpendicular with the depth direction of shrinkage joint 3.

Because the design on strip plane 5, when chuck takes place in the process of deformation in use, just can avoid the seam of its shrinkage joint to disturb along the machinery with outside force application part, not only reduced the deformation force of chuck, also increase the service life of chuck, improved service precision.Certainly, we also can only handle (or mill processing is handled) and form strip plane 5 along milling processing the seam of a part of shrinkage joint 3, can reduce the deformation drag of chuck equally, increase the service life of chuck, but effect are a bit weaker.

Certainly, above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow people can understand content of the present utility model and implements according to this, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of doing according to the spiritual essence of the utility model main technical schemes all should be encompassed within the protection domain of the present utility model.

Claims

1. collet, comprise that its shaft core position is provided with the chuck body (1) of clamping hole (2), described chuck body (1) be provided with some be trapped among described clamping hole (2) outer, axially extended shrinkage joint (3), it is characterized in that: the seam of at least one described shrinkage joint (3) is shaped on chamfering (4) along the place.

2. collet according to claim 1, it is characterized in that: the seam of all shrinkage joints (3) is along locating all to be shaped on chamfering (4).

3. collet, comprise that its shaft core position is provided with the chuck body (1) of clamping hole (2), described chuck body (1) be provided with some be trapped among described clamping hole (2) outer, axially extended shrinkage joint (3), it is characterized in that: the seam of at least one described shrinkage joint (3) is along locating through milling or grind processing and handle and form one along the strip plane (5) of this shrinkage joint (3) length direction extension.

4. collet according to claim 3 is characterized in that: the seam of all shrinkage joints (3) mills or grinds processing and handle and form the strip plane (5) of extending along the shrinkage joint length direction along locating all to pass through.