CN110883720B

CN110883720B - Centering clamping device

Info

Publication number: CN110883720B
Application number: CN201911273404.7A
Authority: CN
Inventors: 郭彩芬
Original assignee: Suzhou Vocational University
Current assignee: Suzhou Vocational University
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-12-17
Anticipated expiration: 2039-12-12
Also published as: CN110883720A

Abstract

The invention provides a centering and clamping device which comprises a base, wherein a stand column is arranged on the base, a cover plate is arranged at the upper end of the stand column, a vertically arranged screw rod is arranged on the cover plate, pin shaft groups are symmetrically arranged on two sides of the screw rod, each pin shaft group comprises two pin shafts which are vertically symmetrical and arranged in parallel, the pin shafts are fixed on the stand column, a nut is connected to the upper end of the screw rod in a threaded mode, and a locking roller is connected to the lower end of the screw rod in a threaded mode. Compared with the prior art, the invention has the beneficial effects that: no matter how the diameter of the positioning pin shaft changes, the center height of the workpiece can be guaranteed to be unchanged, and the clamping mechanism can clamp a plurality of workpieces simultaneously, so that the centering pin shaft is suitable for application occasions where a universal centering clamping mechanism is not suitable to be adopted.

Description

Centering clamping device

Technical Field

The invention relates to the technical field of centering clamping, in particular to a centering clamping device.

Background

The centering and clamping mechanism is characterized in that the positioning and clamping are completed by the same (or the same) element, namely, the positioning, clamping or loosening of the workpiece is completed by utilizing the constant-speed approaching (or retreating) of the element to a certain symmetrical axis or symmetrical plane or by utilizing the uniform elastic deformation of the element. The elements of the fixture which are in contact with the workpiece positioning references are positioning elements and clamping elements. The centering clamping mechanism is adopted to process certain surfaces on the workpiece, so that the reference displacement error is zero, and the processing precision of the workpiece is ensured.

Typical centering and clamping mechanisms include three-jaw self-centering chucks, collet chucks, spring mandrels, and the like. However, for applications where it is inconvenient or impossible to use the centering and clamping mechanism or where it is desired to simultaneously perform multiple centering and clamping operations, the centering and clamping of the workpiece can present a challenge.

Disclosure of Invention

In order to solve the problems, the invention discloses a centering clamping device which can ensure that the center height of a workpiece is unchanged no matter how the diameter of a positioning pin shaft is changed, and a clamping mechanism can simultaneously clamp a plurality of workpieces.

In order to achieve the above purpose, the invention provides the following technical scheme:

a centering and clamping device is characterized in that: the automatic locking device comprises a base, be equipped with the stand on the base, the upper end of stand is equipped with the apron, be equipped with the screw rod of vertical setting on the apron, the bilateral symmetry of screw rod is equipped with the round pin axle group, the round pin axle group includes two longitudinal symmetry and the round pin axle of mutual parallel arrangement, the round pin axle is fixed on the stand, the upper end threaded connection of screw rod has the nut, and lower extreme threaded connection has the locking roller.

Furthermore, a straight groove is arranged at the position, corresponding to the screw, of the cover plate.

Further, the nut is matched with the screw rod.

Furthermore, the locking roller is provided with a screw hole matched with the screw rod.

Compared with the prior art, the invention has the beneficial effects that: no matter how the diameter of the positioning pin shaft changes, the center height of the workpiece can be guaranteed to be unchanged, and the clamping mechanism can clamp a plurality of workpieces simultaneously, so that the centering pin shaft is suitable for application occasions where a universal centering clamping mechanism is not suitable to be adopted.

Drawings

Fig. 1 is a schematic view of a centering and clamping device according to the present invention.

Fig. 2 is a left side view of fig. 1.

List of reference numerals:

1-base, 2-locking roller, 3-pin shaft, 4-workpiece, 5-upright post, 6-cover plate, 7-straight groove, 8-nut and 9-screw.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in the figure, a centering clamping device, including base 1, be equipped with stand 5 on the base 1, the upper end of stand 5 is equipped with apron 6, is equipped with the screw rod 9 of vertical setting on the apron 6, and the bilateral symmetry of screw rod 9 is equipped with round pin axle group, and round pin axle group includes two longitudinal symmetry and mutual parallel arrangement's round pin axle 3, and round pin axle 3 fixes on stand 5, and the upper end threaded connection of screw rod 9 has nut 8, and lower extreme threaded connection has lock roller 2. Four pin shafts 3 with the same diameter are fixed on the upright post 5 and symmetrically distributed on two sides of the screw rod 9. No matter how the diameter of the pin shaft 3 changes, the connecting line of the central points of the two diagonal pin shafts is always at the same height, namely the central height of the workpiece positioned by the four pin shafts 3 is unchanged and is always on the O-O connecting line, as shown in figure 2.

In the embodiment, a straight groove 7 is arranged on the cover plate 6 at a position corresponding to the screw 9, and the screw 9 can move back and forth in the straight groove to adapt to the change of the diameter size of the workpiece.

In the present embodiment, the nut 8 is adapted to the screw 9.

In this embodiment, the locking roller 2 is provided with a screw hole adapted to the screw 9.

When the device is used, two workpieces 4 are respectively placed between two pin shafts 3 of two pin shaft groups, the nut 8 is screwed, the locking roller 2 moves upwards until the workpieces are locked, and at the locking position, the two pin shafts 3 on the same side can be reliably and tightly contacted with the workpieces on the same side, so that the position of the center height of the workpieces is ensured to be unchanged. When the diameter of the workpiece 4 changes, the sizes of the pin shaft 3 and the locking roller 2 can be adjusted simultaneously, so that the workpiece is reliably positioned and clamped.

The centering and clamping device is suitable for centering and clamping a revolving body workpiece with a small size, and if the contact surface of the pin shaft 3 is abraded, the centering and clamping device can be normally applied as long as the pin shaft is rotated by a certain angle.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims

1. A centering and clamping device is characterized in that: including base (1), be equipped with stand (5) on base (1), the upper end of stand (5) is equipped with apron (6), be equipped with screw rod (9) of vertical setting on apron (6), the bilateral symmetry of screw rod (9) is equipped with round pin axle group, round pin axle group is including two longitudinal symmetry and mutual parallel arrangement's round pin axle (3), round pin axle (3) are fixed on stand (5), the upper end threaded connection of screw rod (9) has nut (8), and lower extreme threaded connection has locking roller (2).

2. A centering and clamping device, according to claim 1, characterized in that: and a straight groove (7) is arranged at the position, corresponding to the screw rod (9), on the cover plate (6).

3. A centering and clamping device, according to claim 1, characterized in that: the nut (8) is matched with the screw rod (9).

4. A centering and clamping device, according to claim 1, characterized in that: and the locking roller (2) is provided with a screw hole matched with the screw rod (9).