CN201198038Y

CN201198038Y - Clamping device

Info

Publication number: CN201198038Y
Application number: CNU2008200471673U
Authority: CN
Inventors: 周明华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-29
Filing date: 2008-04-29
Publication date: 2009-02-25
Anticipated expiration: 2018-04-29

Abstract

The utility model relates to a clamping device which comprises a support saddle, wherein, a clamp main body is rotatably arranged in the support saddle, the front end of the clamp main body is symmetrically provided with three guide grooves and fixture blocks, two outer sides of the guide grooves are provided with outer grooves, inner grooves are arranged on the corresponding positions of the fixture blocks and the outer grooves, the interior of the clamp main body is coaxially provided with a pull rod which enables the fixture blocks to retract back and forth, offsetting springs are arranged between the pull rod and the clamp main body, the outer surfaces of the fixture blocks are flat surfaces which are parallel to the lower bottom surfaces of the outer grooves, and lock blocks are arranged on the outer surface of the clamp main body tightly clinging to the fixture blocks. The clamping device has simple structure and high precision of the fixture blocks and ensures the quality of parts during the producing process.

Description

A kind of clamping device

Technical field

The utility model relates to a kind of clamping device.

Background technology

In mechanical processing process, the parts that need process are cylindrical component particularly, need a grip device accurately mostly, the primary structure of anchor clamps is that the front end at jig main body is arranged with slidably fixture block, be with conical sleeve in the fixture block outside, the outer surface of fixture block is an arc-shaped surface, the corresponding concave profile that matches with the fixture block outer surface that is provided with of conical sleeve, this traditional anchor clamps are when the clamping cylindrical component, pull bar by jig main body inside with fixture block toward post-tensioning, fixture block touch arc surface and moves backward, three fixture blocks are clamped part and are processed, but because the contact-making surface between fixture block and the conical sleeve is a cambered surface, both are difficult to reach seamless cooperation, therefore be installed in the fixture block low precision when work on this jig main body, influence the product quality of part.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of simple in structure, clamping device that precision is high.

The technical scheme that the utility model adopted is:

A kind of clamping device, it comprises bearing, be rotatablely equipped with jig main body in the bearing, the jig main body front end is arranged with three guide grooves and fixture block, two outsides of guide groove are provided with outer groove, fixture block is being provided with inner groovy with outer groove corresponding position, jig main body inside is coaxially arranged with the pull bar that can make fixture block elastic, between pull bar and the jig main body back-moving spring is housed, the outer surface of described fixture block is a burnishing surface, this burnishing surface is parallel with the bottom surface of outer groove, and jig main body is equipped with briquetting in the outer surface of being close to fixture block.

The beneficial effects of the utility model are: because the outer surface of fixture block is a burnishing surface, the burnishing surface of fixture block is provided with briquetting, when fixture block moves forward and backward work, can only move along outer groove straight line under the constraint of fixture block groove outside briquetting reaches, this project organization is simple, the accuracy height of fixture block has simultaneously guaranteed the quality of part in process of production.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a decomposing schematic representation of the present utility model;

Fig. 3 is the utility model axial arrangement schematic diagram;

Fig. 4 is the assembling schematic diagram of fixture block and pull bar.

The specific embodiment

Referring to figs. 1 through Fig. 4, a kind of clamping device, it comprises bearing 1, be rotatablely equipped with jig main body 2 in the bearing 1, jig main body 2 front ends are arranged with three guide grooves 3 and fixture block 4, two outsides of guide groove 3 are provided with outer groove 31, fixture block 4 is being provided with inner groovy 41 with outer groove 31 corresponding positions, jig main body 2 inside are coaxially arranged with the pull bar 5 that can make fixture block 4 elastic, between pull bar 5 and the jig main body 2 back-moving spring 6 is housed, the outer surface of described fixture block 4 is burnishing surfaces 42, and this burnishing surface 42 is parallel with the bottom surface of outer groove 31, and jig main body 2 is equipped with briquetting 7 in the outer surface of being close to fixture block 4.

During work, utilize other machinery with the past post-tensioning of pull bar, pull bar drives fixture block 4 and moves backward, owing to be subjected to the outer groove 31 of guide groove 3 both sides and the constraint of briquetting, fixture block can only be slided along the guiding of outer groove 31 to be opened, when part is admitted to that three fixture blocks are formed grabs in the mouth, the exterior mechanical parts unclamp pull bar 5, pull bar 5 resets under the effect of spring 6, three fixture blocks 4 are clamped part, and the design's clamping device is simple in structure, the accuracy height of fixture block, becoming flexible can not appear in fixture block, has guaranteed the quality of part in process of production.

Jig main body 2 is provided with the local burnishing surface 21 parallel with the bottom surface of outer groove 31; briquetting 7 is loaded on this part burnishing surface 21; contact for face between briquetting 7 and the fixture block 4; above-mentioned just the utility model preferred embodiment; it does not constitute the restriction to the utility model protection domain; similarly; adopt the briquetting of flanging, convex or concave also can realize retraining the purpose of fixture block, so long as realize that with essentially identical means the purpose of this utility model all should belong to protection domain of the present utility model.

Further, each fixture block 4 front end is provided with the clamping platform 43 towards internal projection, in the clamping platform, kept bigger space, make the scope of application of clamping device wider, in addition, the dual-side of the design's clamping platform 43 is bevel edges 44, and the gap that forms when three fixture blocks are closed up is less, can be used for the more tiny product of clamping.

Claims

1. clamping device, it comprises bearing (1), be rotatablely equipped with jig main body (2) in the bearing (1), jig main body (2) front end is arranged with three guide grooves (3) and fixture block (4), two outsides of guide groove (3) are provided with outer groove (31), fixture block (4) is being provided with inner groovy (41) with outer groove (31) corresponding position, jig main body (2) inside is coaxially arranged with the pull bar (5) that can make fixture block (4) elastic, between pull bar (5) and the jig main body (2) back-moving spring (6) is housed, it is characterized in that: the outer surface of described fixture block (4) is burnishing surface (42), this burnishing surface (42) is parallel with the bottom surface of outer groove (31), and jig main body (2) is equipped with briquetting (7) in the outer surface of being close to fixture block (4).

2. a kind of clamping device according to claim 1, it is characterized in that: described jig main body (2) is provided with the local burnishing surface (21) parallel with the bottom surface of outer groove (31), briquetting (7) is loaded on this part burnishing surface (21) and locates, and contacts for face between briquetting (7) and the fixture block (4).

3. according to claim 1 or 2 described a kind of clamping devices, it is characterized in that: each fixture block (4) front end is provided with the clamping platform (43) towards internal projection.

4. a kind of clamping device according to claim 3 is characterized in that: the dual-side of described clamping platform (43) is bevel edge (44).