CN219402367U - Pneumatic clamp - Google Patents

Abstract

A pneumatic clamp comprising: the air cylinder device comprises an air cylinder 1, a partition plate 2, a connecting rod 3, a connecting shaft 4, an expansion shaft 5 and a top cover 6, wherein the connecting shaft 4 is arranged on the partition plate 2, the connecting rod 3 is arranged inside the connecting shaft 4, one end of the connecting rod 3 is connected with the air cylinder 1, the other end of the connecting rod 3 is connected with the top cover 6, and the expansion shaft 5 is arranged between the connecting shaft 4 and the top cover 6. The cylinder 1 pulls the top cover 6 through the connecting rod 3 to expand the expansion shaft 5 so as to achieve the purpose of fixing parts. The contact area of the expansion shaft 5 and the inner hole of the thin-wall cylinder part is large, the stress is uniform, and the clamping deformation of the thin-wall cylinder part is reduced.

Description

Pneumatic clamp

Technical Field

The utility model belongs to the field of tools, and particularly relates to a pneumatic clamp.

Background

In the process of machining the outer surface of the thin-walled cylinder part, the inner hole of the thin-walled cylinder part is often required to be clamped and positioned, so that an expansion shaft is generally used to extend into the inner hole of the thin-walled cylinder part and expand the inner hole.

In the prior art, as disclosed in chinese patent publication CN210001336U, an inflation-free expansion shaft is provided, in which a stay rod is extended from an opening on the expansion shaft body to achieve the purpose of tensioning a fixing part, which is also a mode used by most expansion shafts in the present stage. But the contact area of the stay bar and the thin-wall cylinder part is smaller, the pressure intensity is larger, the stress is more concentrated, and the deformation is easy to generate.

Disclosure of Invention

The utility model aims to provide a pneumatic clamp which solves the problem that in the prior art, thin-wall cylindrical parts are easy to deform through inner hole clamping and positioning.

To this end, the utility model provides a pneumatic clamp comprising: the air cylinder device comprises an air cylinder 1, a partition plate 2, a connecting rod 3, a connecting shaft 4, an expansion shaft 5 and a top cover 6, wherein the connecting shaft 4 is arranged on the partition plate 2, the connecting rod 3 is arranged inside the connecting shaft 4, one end of the connecting rod 3 is connected with the air cylinder 1, the other end of the connecting rod 3 is connected with the top cover 6, and the expansion shaft 5 is arranged between the connecting shaft 4 and the top cover 6.

Preferably, a plurality of open slots 7 are formed in the side face of the expansion shaft 5, and the spacing between two adjacent open slots 7 is the same.

Preferably, the open groove 7 starts from one end face of the expansion shaft 5, and the distance from the end of the open groove 7 to the end face of the other end of the expansion shaft 5 is the same as the interval between two adjacent open grooves 7.

Preferably, the open groove 7 is different from the initial end face of the adjacent open groove 7. The expansion shaft 5 can be expanded and not broken by arranging the open slot 7, and can be restored to the original state by means of elasticity when external force is lost.

Preferably, one end of the expansion shaft 5 near the top cover 6 is matched with the top cover 6 through conical chamfer.

Preferably, one end of the expansion shaft 5 near the connecting shaft 4 is matched with the connecting shaft 4 through conical chamfer. The top cover 6 is more easily extruded into the expansion shaft 5 through the fit of the bevel chamfer, and the expansion shaft 5 is spread.

Further preferably, the material of the expansion shaft 5 is selected from one of alloy spring steel, carbon structural steel, carbon tool steel and stainless steel.

Preferably, a cavity is formed between the top cover 6 and the connecting shaft 4, so that the top cover 6 can be conveniently extruded into the expansion shaft 5.

Preferably, the top cover 6 is fixedly connected with the connecting rod 3.

Further preferably, the top cover 6 is fixedly connected with the connecting rod 3 through threads.

Preferably, the connecting shaft 4 is fixedly connected with the partition board 2.

Further preferably, the connecting shaft 4 is fixedly connected with the partition board 2 through threads.

Preferably, the partition board 2 is provided with a connecting hole 8. The connecting holes 8 on the partition plate 2 are used for mounting the whole pneumatic clamp on a machine tool.

The beneficial effects are that:

1. the utility model provides a pneumatic clamp, which clamps a thin-wall cylinder part through an expansion shaft 5, has large contact area between the expansion shaft 5 and an inner hole of the thin-wall cylinder part, has uniform stress, and reduces clamping deformation of the thin-wall cylinder part.

2. When the cylinder 1 is started, the cylinder 1 pulls the connecting rod 3 and the top cover 6 on the connecting rod 3 to clamp the expansion shaft 5, and the top cover 6 is extruded into the expansion shaft 5 to expand the expansion shaft 5, so that parts are clamped.

3. The opening groove 7 on the expansion shaft 5 enables the expansion shaft 5 to be expanded and not broken when the top cover 6 is extruded in, and the expansion shaft 5 can be restored when the top cover 6 slides out of the expansion shaft 5.

4. The two sides of the expansion shaft 5 are provided with conical surface chamfers which are respectively matched with the top cover 6 and the connecting shaft 4, and the top cover 6 is easier to squeeze into the expansion shaft 5 along the conical surface chamfers to expand the expansion shaft 5.

5. The baffle plate 2 is provided with a connecting hole 8 which is convenient for installing the whole pneumatic clamp on a machine tool.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an embodiment of a pneumatic fixture according to the present utility model.

Fig. 2 is a front cross-sectional view of an embodiment of a pneumatic clamp according to the present utility model.

Fig. 3 is a front view of an embodiment of a pneumatic clamp according to the present utility model.

Fig. 4 is a left side view of an embodiment of a pneumatic clamp according to the present utility model.

In the figure: 1-cylinder, 2-baffle, 3-connecting rod, 4-connecting axle, 5-inflation axle, 6-top cap, 7-open slot, 8-connecting hole.

Detailed Description

The contents of the present utility model can be more easily understood by referring to the following detailed description of preferred embodiments of the present utility model and examples included. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. In case of conflict, the present specification, definitions, will control.

Example 1:

the pneumatic clamp is provided for clamping and positioning the inner hole of the thin-wall cylindrical part and reducing deformation generated during clamping, and is shown in figures 1-4.

The pneumatic clamp includes: the air cylinder 1, the baffle 2, the connecting rod 3, the connecting axle 4, the inflation axle 5, the top cap 6, the connecting axle 4 is installed on the baffle 2, and connecting rod 3 is inside the connecting axle 4, and cylinder 1 is connected to connecting rod 3 one end, and top cap 6 is connected to the other end, and inflation axle 5 is between connecting axle 4 and top cap 6.

The outer diameter of the expansion shaft 5 is 100mm, 8 open slots 7 are formed in the side face, the distance between two adjacent open slots 7 is about 40mm, the open slots 7 extend from the end face of the expansion shaft 5 to the distance of 40mm from the side face of the expansion shaft 5 to the end face of the other end of the expansion shaft 5, and the open slots 7 are different from the initial end faces of the adjacent open slots 7. The expansion shaft 5 is formed into a structure similar to a snake-shaped spring by arranging the open groove 7, so that the expansion shaft can be expanded and not broken when being subjected to external force, and can be restored to the original state by means of elasticity when losing the external force.

One end of the expansion shaft 5, which is close to the top cover 6, is matched with the top cover 6 through a conical chamfer, and one end of the expansion shaft 5, which is close to the connecting shaft 4, is matched with the connecting shaft 4 through a conical chamfer. The top cover 6 is more easily extruded into the expansion shaft 5 through the fit of the bevel chamfer, and the expansion shaft 5 is spread.

The expansion shaft 5 is made of alloy spring steel, has higher tensile strength, elastic limit and high fatigue strength, and can freely expand or contract, so that the service life of the expansion shaft 5 is longer.

A cavity is arranged between the top cover 6 and the connecting shaft 4, so that the top cover 6 is conveniently extruded into the expansion shaft 5.

The top cover 6 is fixedly connected with the connecting rod 3 through threads.

The connecting shaft 4 is fixedly connected with the partition board 2 through threads.

The partition plate 2 is provided with a connecting hole 8. The connecting holes 8 on the partition plate 2 are used for mounting the whole pneumatic clamp on a machine tool.

Working principle: the pneumatic clamp is mounted on the machine tool by using bolts through the connecting holes 8 on the partition plate 2 and is connected and fastened. The inner hole of the part is sleeved on the expansion shaft 5, the cylinder 1 is started, the cylinder 1 pulls the connecting rod 3 and the top cover 6 on the connecting rod 3 to squeeze the expansion shaft 5, the top cover 6 is squeezed into the expansion shaft 5 through the conical surface chamfer, and the top cover 6 can prop open the expansion shaft 5 because the outer diameter of the top cover 6 is larger than the inner diameter of the expansion shaft 5. The expansion shaft 5 is provided with an open slot 7, the open slot 7 enables the expansion shaft 5 to be expanded and not to be broken when the top cover 6 is extruded in, and the expansion shaft 5 can be restored when the top cover 6 slides out of the expansion shaft 5.

The foregoing examples are illustrative only and serve to explain some features of the method of the utility model. The appended claims are intended to claim the broadest possible scope and the embodiments presented herein are merely illustrative of selected implementations based on combinations of all possible embodiments. It is, therefore, not the intention of the applicant that the appended claims be limited by the choice of examples illustrating the features of the utility model. Some numerical ranges used in the claims also include sub-ranges within which variations in these ranges should also be construed as being covered by the appended claims where possible.

Claims (10)

1. A pneumatic clamp, the pneumatic clamp comprising: cylinder (1), baffle (2), connecting rod (3), connecting axle (4), inflation axle (5), top cap (6), connecting axle (4) are installed on baffle (2), connecting rod (3) are inside connecting axle (4), cylinder (1) is connected to connecting rod (3) one end, and top cap (6) are connected to the other end, inflation axle (5) are between connecting axle (4) and top cap (6).

2. A pneumatic clamp according to claim 1, characterized in that a plurality of open grooves (7) are formed in the side face of the expansion shaft (5), and the distance between two adjacent open grooves (7) is the same.

3. A pneumatic clamp according to claim 2, characterized in that the open groove (7) starts from one end face of the expansion shaft (5), and the distance from the end of the open groove (7) to the end face of the other end of the expansion shaft (5) is the same as the distance between two adjacent open grooves (7).

4. A pneumatic clamp according to claim 3, characterized in that the open groove (7) differs from the initial end face of its adjacent open groove (7).

5. A pneumatic clamp according to claim 1, characterized in that the end of the expansion shaft (5) adjacent to the top cover (6) is matched with the top cover (6) by means of a conical chamfer.

6. A pneumatic clamp according to claim 5, characterized in that the end of the expansion shaft (5) adjacent to the connecting shaft (4) is fitted with the connecting shaft (4) by means of a conical chamfer.

7. A pneumatic clamp according to claim 1, characterized in that a cavity is provided between the top cover (6) and the connecting shaft (4).

8. A pneumatic clamp according to claim 1, characterized in that the top cover (6) is fixedly connected to the connecting rod (3).

9. A pneumatic clamp according to claim 1, characterized in that the connecting shaft (4) is fixedly connected with the partition (2).

10. A pneumatic clamp according to claim 1, characterized in that the partition (2) has connecting holes (8).