CN2223663Y

CN2223663Y - Hydaulic and pneumatic coaxial positioning collet chuck

Info

Publication number: CN2223663Y
Application number: CN 95200182
Authority: CN
Inventors: 姚玉明
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-06
Filing date: 1995-01-06
Publication date: 1996-04-03
Anticipated expiration: 2005-01-06

Abstract

The utility model provides a hydraulic and pneumatic axial positioning spring clamping head. An elastic sleeve barrel is inserted in a clamping appliance body, and a fixed axial positioning device is arranged between the clamping appliance body and the elastic sleeve barrel. The utility model is characterized in that the axial positioning device is composed of three screws and three positioning blocks which are connected and fixed with the three screws, wherein the three screws are arranged in three holes which are arranged on a plane which is perpendicular to the rotary axial line of the plane, the three holes and the clamping appliance body are positioned on the same plane, and the axial lines of the three holes are mutually distributed in 120 DEG. When the elastic sleeve barrel moves leftwards to clamp a workpiece, the axial positioning device does not change in the axial position, and thus the positioning accuracy in the axial direction is ensured. Three wide slots guarantee that the positioning blocks or the screws do not interfere with the moving elastic sleeve barrel.

Description

Pneumatic axial location collet surges

The utility model relates to a kind of collet, particularly a kind of pneumatic axial location collet that surges.

At present, the existing various lathes usefulness of China are surged, pneumatic axial location collet great majority are realized axial location with the resilient sleeve counter bore structure, and there is following shortcoming in this collet.

1: work is moved with resilient sleeve, and work can not accurately be located, and positioning accuracy is low.2: workpiece external diameter error is very big to the axial location error effect, guarantee the axial location precision, will improve the machining accuracy of workpiece external diameter, has increased processing cost.3: can not guarantee the quality requirement of axial location precision less than the 0.1mm workpiece.

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect of prior art, and provide a kind of higher axial location precision that has, unified design basis of energy and technological datum, the pneumatic axial location collet that surges that can raise labour productivity, cut down finished cost.

The purpose of this utility model is to realize by following mode, in clamp body, be fitted with resilient sleeve, a fixing axial direction positioning device is housed between clamp body and resilient sleeve, it is characterized in that: axial direction positioning device is by being positioned at same three screws perpendicular to three holes on the plane of himself axis of rotation of clamp body, constitute with three screw attachment fixing locating pieces, the axis in three holes 120 degree each other distributes, when resilient sleeve during to the left movement clamping work pieces, axial direction positioning device does not have axial location yet to be changed, thereby guaranteed the axial location precision, three sipes then are not interfere for the resilient sleeve that guarantees locating piece or screw and motion.

Therefore: outstanding advantage of the present utility model is:

Axial location precision height, can reach the high position precision of 0.005mm, axial direction positioning device and resilient sleeve independently exist separately, workpiece does not produce with resilient sleeve and moves axially, the axial location precision does not change with workpiece external diameter error, improved process economy, unify design basis and technological datum, optimized mechanical processing technique, reduced the technology cost price, can process the less workpiece of axial dimension tolerance, can enlarge the range of work and the production efficiency of lathe, reduce labour intensity, improve crudy, simple in structure, be easy to realize, and have the characteristics of low cost of manufacture.

Concrete structure of the present utility model is realized by the following examples and accompanying drawing:

Fig. 1 is the section of structure of embodiment 1 of the present utility model.

Fig. 2 is the section of structure of embodiment 2 of the present utility model.

Fig. 3 is the section of structure of embodiment 3 of the present utility model.

Below in conjunction with accompanying drawing 1-3 concrete structure of the present utility model is described in detail;

The utility model has a clamp body 3 that has an endoporus 31, in clamp body 3 endoporus 31, be fitted with resilient sleeve 4, a fixing axial direction positioning device is housed between clamp body 3 and resilient sleeve 4, it is characterized in that: axial direction positioning device be by be positioned at clamp body 3 same perpendicular to three holes 32 on the plane of himself axis of rotation three screws 1 and constitute with locating piece 2 that each screw 1 is connected and fixed, the axis in three holes 120 degree each other distributes.Referring to Fig. 1 and Fig. 2.

Architectural feature of the present utility model also is:

Respectively be provided with a sipes 42 on three grooves 41 of resilient sleeve 4, the length of sipes 42 and position do not interfere with each other with the resilient sleeve 4 of the locating piece 2 of axial direction positioning device or screw 1 and motion and are the foundation size.Referring to Fig. 1.

Locating piece 2 is one to be housed in the whole ladder block structure in resilient sleeve 4 endoporus or to be inserted into three separate components in the clamp body 3 respectively.

Structure shown in Figure 1 is applicable to the axial workpiece of processing design basis at axle one end face, is connected with the firm of screw 21 of locating piece 2 by three screws 1, realizes axial location.

Structure shown in Figure 2 is applicable to the ladder shaft sleeve parts of processing design basis at the shoulder end face.Three screws 1 are stopped 3 with three locating pieces 2 and anchor clamps and are connected and fixed and realize axial location.

Structure shown in Figure 3 is to be applicable to the disk-like accessory of processing design basis at outer face and shoulder end face, and locating piece 2 is connected and fixed and realizes axial location by 6 screws and clamp body.

Need to prove that the axial location of locating piece 2 on clamp body 3 need determine that the length of three sipes 42 and position will guarantee that locating piece 2 or screw 1 do not interfere with the resilient sleeve 4 that moves on the resilient sleeve according to process.

Claims

1, the pneumatic axial location collet that surges, one clamp body (3) that has endoporus (31) is arranged, in clamp body (3) endoporus (31), be fitted with resilient sleeve (4), between clamp body (3) and resilient sleeve (4), a fixing axial direction positioning device is housed, it is characterized in that: axial direction positioning device be by be positioned at clamp body (3) same perpendicular to three holes (32) on the plane of himself axis of rotation three screws (1) and constitute with locating piece (2) that each screw (1) is connected and fixed, the axis in three holes 120 degree each other distributes.

2, according to the described pneumatic axial location collet that surges of claim 1, it is characterized in that: locating piece (2) is one to be housed in the whole ladder block structure in resilient sleeve (4) endoporus.

3, according to claim 1 or the 2 described pneumatic axial location collets that surge, it is characterized in that: on three grooves (41) of resilient sleeve (4), respectively be provided with a sipes (42).