Inner diameter clamping cylinder

Abstract

The utility model relates to an inner diameter clamping air cylinder which comprises an air cylinder body, a piston and a clamping device, one end of the piston penetrates through the air cylinder body, the clamping device is assembled on the air cylinder body through the piston, and the end, penetrating through the piston, of the air cylinder body is of an upwards-narrowed circular truncated cone structure. An inner cavity, matched with the air cylinder body, of the clamping device adopts a circular truncated cone-shaped groove which is matched with the circular truncated cone structure in an inserted mode and narrows downwards, a clamping groove which is clamped on the inner side of a workpiece is formed in the upper outer side portion of the clamping device, the clamping device is of a sectional structure and is divided into n conical tables with the clamping grooves, and n is a natural number larger than or equal to 2. Through cooperation of the clamping device and the air cylinder, clamping and loosening of a workpiece are achieved, the workpiece is easy to assemble and disassemble, the fixing time of the workpiece is effectively shortened, and the production efficiency is improved; large fixing force can be obtained through the air cylinder, and the stability of workpiece fixing is improved; due to the fact that the clamping force brought by the clamping device can be evenly transmitted to the inner diameter face of the workpiece, the thin-wall workpiece can be machined with high precision.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to an inner diameter clamping cylinder. Background Art

[0002] In the current production process, many operations require the workpiece to be fixed before they can be performed. The chuck-type clamps currently used are very time-consuming to fix the workpiece, and thin-walled workpieces will deform when fixed with chuck-type clamps, and high-precision processing cannot be performed. If a weaker fixing force is used, once the workpiece is separated, defective products will be produced; and this fixing method takes a long time, which is not conducive to improving production efficiency.

[0003] In view of the problems of low production efficiency and low fixing stability in the existing workpiece fixing, it is necessary to provide a workpiece fixing device with high efficiency and stability. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide an inner diameter clamping cylinder in order to overcome the deficiencies in the prior art.

[0005] The utility model solves the technical problem by adopting a technical solution: an inner diameter clamping cylinder, comprising a cylinder body, a piston with one end passing through the cylinder body, and a clamping device assembled on the cylinder body through the piston.

[0006] The end of the cylinder body passing through the piston adopts a frustum structure that narrows upwards.

[0007] The inner cavity of the clamping device and the cylinder body adopts a downwardly narrowed truncated cone groove that is plug-fitted with the truncated cone structure, and the upper outer side of the clamping device is provided with a clamping groove that is clamped on the inner side of the workpiece.

[0008] The clamping device adopts a segmented structure, which is divided into n conical platforms with clamping grooves, where n is a natural number ≥2.

[0009] Through the truncated cone structure of the cylinder body and the segmented clamping device, when moving upward, each section of the clamping device is close to each other, the diameter of the outer side of the clamping device becomes the smallest, and the workpiece is released; when moving downward, a gap is generated between each section of the clamping device, the diameter of the outer side of the clamping device becomes larger, and the workpiece is clamped. The coordination of the clamping device and the cylinder realizes the clamping and loosening of the workpiece, facilitates the loading and unloading of the workpiece, effectively shortens the fixing time of the workpiece, and improves production efficiency.

[0010] Furthermore, a limiting groove is provided on the inner wall of the clamping device above the truncated cone groove, an upper cavity exists between the limiting groove and the upper end surface of the cylinder body, and a lower cavity is provided at one end of the cylinder body away from the clamping device.

[0011] Furthermore, one end of the piston is a piston head that performs linear motion in the lower cavity, and the other end is a limit block that passes through the cylinder body and is limited in the limit groove of the clamping device, and the limit block performs linear motion in the upper cavity.

[0012] Furthermore, the cylinder body is provided with a first pressurizing port and a second pressurizing port connected to the lower cavity.

[0013] Furthermore, a convex ring with a mounting groove is provided at one end of the cylinder body away from the clamping device.

[0014] The beneficial effects of the utility model are as follows: through the cooperation of the clamping device and the cylinder, the clamping and loosening of the workpiece are achieved, which makes the loading and unloading of the workpiece simple, effectively shortens the fixing time of the workpiece, and improves the production efficiency; a larger fixing force can be obtained through the cylinder, which improves the stability of the workpiece fixation; because the clamping force brought by the clamping device can be evenly transmitted to the inner diameter surface of the workpiece, thin-walled workpieces can be processed with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the utility model.

[0018] Numbers in the figure: 1-cylinder body, 11-pressure port 1, 12-pressure port 2, 13-lower cavity, 14-upper cavity, 15-mounting groove, 2-piston, 21-piston head, 22-limiting block, 3-clamping device, 31-limiting groove, 32-clamping groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Figure 1 and Figure 2 The inner diameter clamping cylinder shown in the figure comprises a cylinder body 1, a piston 2 with one end passing through the cylinder body 1, and a clamping device 3 assembled on the cylinder body 1 through the piston 2.

[0021] The end of the cylinder body 1 passing through the piston 2 adopts a frustum structure that narrows upward.

[0022] The inner cavity of the clamping device 3 and the cylinder body 1 adopts a downwardly narrowed truncated cone groove adapted for plugging with the truncated cone structure. The upper outer side of the clamping device 3 is provided with a clamping groove 32 clamped on the inner side of the workpiece.

[0023] The clamping device 3 adopts a segmented structure and is divided into four conical platforms with clamping grooves 32 .

[0024] Through the truncated cone structure of the cylinder body 1 and the segmented clamping device 3, when moving upward, each segment of the clamping device is pressed against each other, the diameter of the outer side of the clamping device 3 becomes the smallest, and the workpiece is released; when moving downward, a gap is generated between each segment of the clamping device, the diameter of the outer side of the clamping device becomes larger, and the workpiece is clamped. The clamping device and the cylinder cooperate to achieve the clamping and loosening of the workpiece, facilitate the loading and unloading of the workpiece, effectively shorten the fixing time of the workpiece, and improve production efficiency.

[0025] A limiting groove 31 is provided on the inner wall of the clamping device 3 above the truncated cone groove, an upper cavity 14 exists between the limiting groove 31 and the upper end surface of the cylinder body 1 , and a lower cavity 13 is provided at one end of the cylinder body 1 away from the clamping device 3 .

[0026] One end of the piston 2 is a piston head 21 that performs linear motion in the lower cavity 13, and the other end is a limit block 22 that passes through the cylinder body 1 and is limited in the limit groove 31 of the clamping device 3. The limit block 22 performs linear motion in the upper cavity 14. The limit block 22 is buckled in the limit groove 31, and even if the diameter of the limit groove 31 changes, the limit block 22 will not slip out of the limit groove 31.

[0027] The cylinder body 1 is provided with a pressure port 11 and a pressure port 2 12 which are communicated with the lower cavity 13 .

[0028] A convex ring with a mounting groove 15 is provided at one end of the cylinder body 1 away from the clamping device 3 .

[0029] During operation, the workpiece is first placed outside the clamping groove 32. At this time, the pressure port 12 is pressurized, the piston 2 drives the piston head 21 to move downwardly toward the lower cavity 13, and the limit block 22 drives the clamping device 3 to open outwardly, thereby clamping the workpiece; after the work is completed, the pressure port 11 is pressurized, the piston 2 drives the piston head 21 to move upwardly toward the lower cavity 13, and the limit block 22 drives the clamping device 3 to narrow inwardly, thereby releasing the workpiece.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An inner diameter clamping cylinder, characterized in that: The invention comprises a cylinder body (1), a piston (2) with one end passing through the cylinder body (1), and a clamping device (3) assembled on the cylinder body (1) through the piston (2). The end of the cylinder body (1) passing through the piston (2) adopts a frustum structure that narrows upwards. The inner cavity of the clamping device (3) and the cylinder body (1) is a downwardly narrowed truncated cone groove adapted for plugging with the truncated cone structure. The upper outer side of the clamping device (3) is provided with a clamping groove (32) for clamping on the inner side of the workpiece. The clamping device (3) adopts a segmented structure and is divided into n conical platforms with clamping grooves (32), where n is a natural number ≥2.

2. The inner diameter clamping cylinder according to claim 1, characterized in that: The clamping device (3) is provided with a limiting groove (31) on the inner wall above the truncated cone-shaped groove, an upper cavity (14) is present between the limiting groove (31) and the upper end surface of the cylinder body (1), and a lower cavity (13) is provided at one end of the cylinder body (1) away from the clamping device (3).

3. The inner diameter clamping cylinder according to claim 2, characterized in that: One end of the piston (2) is a piston head (21) that performs linear motion in the lower cavity (13), and the other end is a limit block (22) that passes through the cylinder body (1) and is limited in the limit groove (31) of the clamping device (3), and the limit block (22) performs linear motion in the upper cavity (14).

4. The inner diameter clamping cylinder according to claim 2, characterized in that: The cylinder body (1) is provided with a first pressurizing port (11) and a second pressurizing port (12) which are communicated with the lower cavity (13).

5. The inner diameter clamping cylinder according to claim 1, characterized in that: A convex ring with a mounting groove (15) is provided at one end of the cylinder body (1) away from the clamping device (3).

Images