CN201841288U

CN201841288U - Elastic clamp for clamping inner circumference of workpiece

Info

Publication number: CN201841288U
Application number: CN2010205988537U
Authority: CN
Inventors: 黄可富; 钟成虎
Original assignee: NEIJIANG FANHANG NAIL MANUFACTURE CO Ltd
Current assignee: NEIJIANG FANHANG NAIL MANUFACTURE CO Ltd
Priority date: 2010-11-10
Filing date: 2010-11-10
Publication date: 2011-05-25
Anticipated expiration: 2020-11-10

Abstract

The utility model discloses an elastic clamp for clamping the inner circumference of a workpiece, which comprises a connecting plate with an inner hole, a pull ring slidably mounted in the connecting plate, a pull rod connected with the pull ring, and a clamp body fixedly connected to the connecting plate. The front end of the pull ring is provided with two or more projections, the clamp body is provided with axial holes corresponding to the projections, the projections of the pull ring penetrate through the corresponding axial holes, the front end of the clamp body is provided with a cone with a low front and a high rear, elastic hollow expansion heads are fixedly connected to the projections of the pull ring, the front section of each expansion head is provided with three or more axial grooves, the front end of each expansion head is provided with a conical hole matching with the cone of the clamp body, and a sleeving seat is fixedly connected to the clamp outside the elastic expansion heads. The elastic clamp has the advantages of simple structure, low cost, high positioning precision and small size, and is wider in application range.

Description

The spring chuck of holding workpiece internal diameter

Technical field

The utility model relates to a kind of spring chuck that is used for the holding workpiece internal diameter.

Background technology

At present, when the axle sleeve class part of processing off-centre, generally adopt the method for holding workpiece internal diameter that it is located, and this class spring chuck at present, as the patent No. is 03284028 disclosed a kind of, comprise housing, be fixed on the end face locating ring of housing front end, hold-down bolt and pressing plate, circle centering machine in the housing inner chamber is set with, mobile mounting is contained in this mechanism, collet, preceding push rod, rear push-rod and spring, the outer rim conical surface of wherein mobile mounting front end matches with the conical surface of housing inner chamber one end, preceding push rod is provided with cone, matches with the taper seat of collet inner chamber; During use, the mode that pushes away before the employing, the conical surface that matches with the housing inner chamber by the mobile mounting location that moves forward, by the cone of preceding push rod with the outer support of collet after, again by hold-down bolt and pressing plate fixation workpiece; This clamp member is more, the structure relative complex, and preceding push rod and collet all move vertically, and not only positioning accuracy is relatively poor, also will strengthen the axial dimension of anchor clamps, makes the scope of application of anchor clamps be restricted.

The utility model content

The purpose of this utility model is the above-mentioned deficiency at prior art, and a kind of spring chuck of holding workpiece internal diameter is provided, and it has advantage simple in structure, that cost is low, positioning accuracy is high, volume is little, has the scope of application of broad.

For achieving the above object, the spring chuck of holding workpiece internal diameter of the present utility model, comprise the terminal pad that has endoporus, it is characterized in that also comprising sliding and be loaded on draw ring, the pull bar that connects with draw ring in the terminal pad endoporus, be fixed on the clamp body on the terminal pad, front end at draw ring is provided with two or more protuberances, clamp body is provided with the axial hole corresponding with protuberance, and the protuberance of draw ring passes corresponding axial hole, is provided with one section low early and high after cone at the front end of clamp body; On the protuberance of draw ring, be fixedly connected with the bloated head of hollow elastic, the leading portion of the bloated head of elasticity is provided with the axial groove more than three or three, front end at the bloated head of elasticity is provided with the conical bore that matches with the cone of clamp body, is fixedly connected with block set on the clamp body outside elasticity expands head.

During use, terminal pad is connected with machine tool chief axis, by pulling back pull bar, the bloated head of drawing clitellum dynamic elasticity moves vertically, and the cone of clamp body front end is with support outside the bloated head of elasticity, thus holding workpiece; Block set can be protected the elasticity head that expands; The utility model adopts the mode of post-tensioning, and only the bloated head of pull bar, draw ring and elasticity moves, and the maintenance of the cone of the clamp body of its outer support effect is motionless, has the high advantage of positioning accuracy, and having reduced the axial dimension of anchor clamps, volume is little, has the scope of application of broad; Owing to by the direct positioning clamping of the bloated head of elasticity, save other fixture, have advantage simple in structure, that cost is low;

As further improvement of the utility model, also be associated with the axial location cover at the front end of block set; When pulling back pull bar, the axial location cover is motionless, can carry out axial location to workpiece, holding workpiece that can be more firm and raising positioning accuracy;

In sum, the utlity model has advantage simple in structure, that cost is low, positioning accuracy is high, volume is little, have the scope of application of broad.

Description of drawings

Fig. 1 is the front view of the utility model embodiment.

Fig. 2 is the front view of draw ring among Fig. 1.

Fig. 3 is the right view of Fig. 2.

Fig. 4 is the front view of clamp body among Fig. 1.

Fig. 5 is the right view of Fig. 4.

Fig. 6 is the front view of the bloated head of elasticity among Fig. 1.

Fig. 7 is the right view of Fig. 6.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Extremely shown in Figure 7 as Fig. 1, the spring chuck of this holding workpiece internal diameter, comprise the terminal pad 1 that has endoporus, slide be loaded on draw ring 2 in terminal pad 1 endoporus, with the pull bar 3 of draw ring 2 by thread connection, be fixed on clamp body 4 on the terminal pad 1 by bolt, front end at draw ring 2 is provided with three protuberance 2a, clamp body 4 is provided with three the axial hole 4as corresponding with protuberance, the protuberance 2a of draw ring 2 passes corresponding axial hole 4a, is provided with one section low early and high after cone 4b at the front end of clamp body 4; On the protuberance of draw ring 2, be fixedly connected with hollow elastic bloated 5 by bolt, an expand leading portion of 5 of elasticity is provided with six axial groove 5a, be provided with the conical bore 5b that matches with the cone 4b of clamp body 4 at an expand front end of 5 of elasticity, on elasticity expands the clamp body 4 in 5 outside, be fixedly connected with block set 6, also be associated with axial location cover 7 by bolt at the front end of block set 6 by bolt;

During use, terminal pad 1 is connected with machine tool chief axis, equipment such as pull bar 3 and oil cylinder are connected, and by pulling back pull bar 3, draw ring 2 drives elasticity and expands and 5 move vertically, and the cone 4b of clamp body 4 front ends is with elasticity 5 an outer support of expanding, thus holding workpiece 8; Block set 6 can be protected bloated 5 of elasticity; The utility model adopts the mode of post-tensioning, only bloated 5 of pull bar 3, draw ring 2 and elasticity move, and the cone 4b of the clamp body 4 of its outer support effect and axial location cover 7 keep motionless, has the high advantage of positioning accuracy, and reduced the axial dimension of anchor clamps, volume is little, has the scope of application of broad; Owing to by the bloated 5 direct positioning clamping of elasticity, save other fixture, have advantage simple in structure, that cost is low; Axial location cover 7 can carry out axial location to workpiece 8, holding workpiece that can be more firm and raising positioning accuracy.

Claims

1. the spring chuck of a holding workpiece internal diameter, comprise the terminal pad that has endoporus, it is characterized in that also comprising sliding and be loaded on draw ring, the pull bar that connects with draw ring in the terminal pad endoporus, be fixed on the clamp body on the terminal pad, front end at draw ring is provided with two or more protuberances, clamp body is provided with the axial hole corresponding with protuberance, the protuberance of draw ring passes corresponding axial hole, is provided with one section low early and high after cone at the front end of clamp body; On the protuberance of draw ring, be fixedly connected with the bloated head of hollow elastic, the leading portion of the bloated head of elasticity is provided with the axial groove more than three or three, front end at the bloated head of elasticity is provided with the conical bore that matches with the cone of clamp body, is fixedly connected with block set on the clamp body outside elasticity expands head.

2. the spring chuck of holding workpiece internal diameter as claimed in claim 1 is characterized in that also being associated with the axial location cover at the front end of block set.