Pneumatic chuck driving mechanism

Abstract

The utility model relates to the field of clamping equipment, in particular to a pneumatic chuck driving mechanism which is provided with a piston assembly, a transmission assembly and a clamping jaw assembly, the piston assembly can drive the clamping jaw assembly to be opened and closed through the transmission assembly, and the pneumatic chuck driving mechanism is characterized in that the piston assembly comprises an air cylinder body, a piston, an inner cylinder and an outer sleeve, and the piston is sleeved on the inner cylinder and can move along the inner cylinder; the air cylinder body is arranged between the inner barrel and the outer sleeve and can move along the outer sleeve, the air cylinder body and the piston are opposite in moving direction, an air chamber is arranged between the air cylinder body and the piston, and the two pairs of transmission assemblies are connected to the air cylinder body and the piston respectively. An original push block type clamping jaw transmission structure is changed into lever structure transmission, a lever of the lever structure is in inclined transmission, the stroke of the clamping jaws is effectively improved, the piston mechanism is a single piston, the four clamping jaws are synchronously opened and closed according to the principle that the piston and the air cylinder synchronously and reversely move, the structure is simpler, and the working efficiency is improved. On the premise that the function is not affected, the size of the whole chuck can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping equipment, in particular to a pneumatic chuck driving mechanism. Background Art

[0002] In laser cutting, a pneumatic chuck is used for clamping and fixing a pipe. During use, the pipe is loaded into the chuck, and the pipe is fixed by clamping with a chuck jaw. The pipe rotates synchronously with the chuck to ensure the cutting effect of the pipe.

[0003] In the prior art, the clamping and loosening of the chuck jaw of the pneumatic chuck are realized by a push block structure. Two sets of piston assemblies drive a push block under pneumatic drive, and then the push block drives the chuck jaw to move. However, in actual use, this structure is complex and the required volume is also large. Therefore, limited by the size of the chuck, the stroke of the chuck jaw is greatly limited. Summary of the Utility Model

[0004] Aiming at the above problems, the purpose of the utility model is to provide a pneumatic chuck driving mechanism with a larger stroke, a smaller volume and higher precision for the chuck jaw.

[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows: a pneumatic chuck driving mechanism has a piston assembly, a transmission assembly and a chuck jaw assembly. The piston assembly can drive the chuck jaw assembly to open and close through the transmission assembly. The piston assembly includes a cylinder block, a piston, an inner cylinder and an outer sleeve. The piston is sleeved on the inner cylinder and can move along the inner cylinder. The cylinder block is arranged between the inner cylinder and the outer sleeve and can move along the outer sleeve. The movement direction of the cylinder block is opposite to that of the piston. An air chamber is arranged between the cylinder block and the piston. Two pairs of the transmission assemblies are respectively connected to the cylinder block and the piston.

[0006] In the above technical scheme, the transmission assembly includes a lever and a fixed pin. The lever is mounted on the fixed pin. One end of the lever of one pair of the transmission assemblies is mounted on the piston, and the other end is mounted on a slider of the chuck jaw assembly. One end of the lever of the other pair of the transmission assemblies is mounted on the cylinder block, and the other end is mounted on a slider of the chuck jaw assembly. When the cylinder block and the piston move up and down, they can drive the lever to rotate along the fixed pin.

[0007] In the above technical scheme, the inner end of the lever of one pair of the transmission assemblies is inserted into a piston connection groove of the piston, and the outer end is inserted into a slider connection groove of the corresponding slider. The outer end of the lever of the other pair of the transmission assemblies is inserted into a cylinder block connection groove of the cylinder block, and the inner end is inserted into a slider connection groove of the corresponding slider.

[0008] In the above technical scheme, both ends of the lever are arc heads, and the arc heads can rotate in the cylinder block connection groove, the piston connection groove and the slider connection groove.

[0009] In the above technical solution, the two ends of the lever of a pair of the transmission assemblies are respectively hinged to the piston and the slider, and the two ends of the lever of the other pair of the transmission assemblies are respectively hinged to the cylinder block and the slider.

[0010] In the above technical solution, the fixed pin is fixedly connected to the chuck body.

[0011] In the above technical solution, a guide sleeve is provided on the upper part of the cylinder block, and the outer side of the guide sleeve abuts against the inner wall surface of the outer sleeve.

[0012] In the above technical solution, the jaw assembly includes a slider and jaws, the jaws are fixedly connected to the slider, the slider is arranged in the slider guide groove of the chuck body, and can reciprocate along the slider guide groove.

[0013] In summary, the beneficial effects of adopting the technical solution of the present utility model compared with the traditional technical means are as follows: the present utility model changes the original push-block type jaw transmission structure to a lever structure transmission, the lever of the lever structure is obliquely transmitted, effectively improving the stroke of the jaws. The piston mechanism is a single piston, and by using the principle of synchronous reverse movement of the piston and the cylinder block, the synchronous opening and closing of the four jaws are realized. The structure is simpler, and on the premise that the function is not affected, the size of the entire chuck can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Through the following detailed description in conjunction with the drawings, the foregoing and other objects, features and advantages of the present utility model will become apparent.

[0015] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 2 is a top view schematic diagram of the present utility model;

[0017] Figure 3 is Figure 2 a horizontal cross-sectional schematic diagram of;

[0018] Figure 4 is Figure 2 a vertical cross-sectional schematic diagram of;

[0019] Figure 5 is a three-dimensional structure schematic diagram of the piston and the drive mechanism;

[0020] Figure 6 is a three-dimensional structure schematic diagram of the pneumatic chuck;

[0021] The reference numerals are as follows: 100, piston assembly; 110, cylinder block; 111, cylinder block connection groove; 112, guide sleeve; 120, piston; 121, piston connection groove; 130, inner cylinder; 140, outer sleeve; 200, transmission assembly; 210, lever; 220, fixed pin; 300, jaw assembly; 310, slider; 311, slider connection groove; 320, jaw; 400, chuck body; 410, slider guide groove. Detailed implementation manners

[0022] Based on the ideal embodiments of the present invention as inspiration, through the following description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

[0023] With reference to the following drawings, the present invention will be further described:

[0024] As Figures 1 to 6 shown, a pneumatic chuck driving mechanism has a piston assembly 100, a transmission assembly 200 and a jaw assembly 300. The piston assembly 100 can drive the jaw assembly 300 to open and close through the transmission assembly 200. The piston assembly 100 includes a cylinder block 110, a piston 120, an inner cylinder 130 and an outer sleeve 140. The piston 120 is sleeved on the inner cylinder 130 and can move along the inner cylinder 130. The cylinder block 110 is arranged between the inner cylinder 130 and the outer sleeve 140 and can move along the outer sleeve 140. The movement direction of the cylinder block 110 is opposite to that of the piston 120. An air chamber is provided between the cylinder block 110 and the piston 120. Two pairs of the transmission assemblies 200 are respectively connected to the cylinder block 110 and the piston 120.

[0025] The transmission assembly 200 includes a lever 210 and a fixed pin 220. The lever 210 is mounted on the fixed pin 220. One end of the lever 210 of one pair of the transmission assemblies 200 is mounted on the piston 120, and the other end is mounted on the slider 310 of the jaw assembly 300. One end of the lever 210 of the other pair of the transmission assemblies 200 is mounted on the cylinder block 110, and the other end is mounted on the slider 310 of the jaw assembly 300. When the cylinder block 110 and the piston 120 move up and down, they can drive the lever 210 to rotate along the fixed pin 220.

[0026] The inner ends of the levers 210 of a pair of the transmission assemblies 200 are inserted into the piston connection grooves 121 of the piston 120, and the outer ends are inserted into the slider connection grooves 311 of the corresponding sliders 310. The outer ends of the levers 210 of the other pair of the transmission assemblies 200 are inserted into the cylinder block connection grooves 111 of the cylinder block 110, and the inner ends are inserted into the slider connection grooves 311 of the corresponding sliders 310.

[0027] Both ends of the lever 210 are arc-shaped heads, and the arc-shaped heads can rotate in the cylinder block connection grooves 111, the piston connection grooves 121, and the slider connection grooves 311.

[0028] Both ends of the levers 210 of a pair of the transmission assemblies 200 are respectively hinged to the piston 120 and the slider 310, and both ends of the levers 210 of the other pair of the transmission assemblies 200 are respectively hinged to the cylinder block 110 and the slider 310.

[0029] The fixing pin is fixedly connected to the chuck body 400.

[0030] A guide sleeve 112 is provided on the upper part of the cylinder block 110, and the outer side of the guide sleeve 112 abuts against the inner wall surface of the outer sleeve 140.

[0031] The jaw assembly 300 includes a slider 310 and jaws 320. The jaws 320 are fixedly connected to the slider 310. The slider 310 is arranged in the slider guide groove 410 of the chuck body 400 and can reciprocate along the slider guide groove 410.

[0032] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic chuck driving mechanism, having a piston assembly, a transmission assembly and a jaw assembly, wherein the piston assembly can drive the jaw assembly to open and close through the transmission assembly, and is characterized in that: The piston assembly includes a cylinder block, a piston, an inner cylinder and an outer sleeve. The piston is sleeved on the inner cylinder and can move along the inner cylinder. The cylinder block is arranged between the inner cylinder and the outer sleeve and can move along the outer sleeve. The moving direction of the cylinder block is opposite to that of the piston. An air chamber is provided between the cylinder block and the piston. Two pairs of the transmission components are respectively connected to the cylinder block and the piston.

2. The pneumatic chuck drive mechanism according to claim 1, wherein: The transmission component includes a lever and a fixed pin. The lever is mounted on the fixed pin. One end of the lever of one pair of the transmission components is mounted on the piston, and the other end is mounted on the slider of the claw assembly. One end of the lever of the other pair of the transmission components is mounted on the cylinder block, and the other end is mounted on the slider of the claw assembly. When the cylinder block and the piston move up and down, they can drive the lever to rotate along the fixed pin.

3. The pneumatic chuck driving mechanism according to claim 2, characterized in that: The inner ends of the levers of one pair of the transmission components are inserted into the piston connection grooves of the piston, and the outer ends are inserted into the slider connection grooves of the corresponding sliders. The outer ends of the levers of the other pair of the transmission components are inserted into the cylinder block connection grooves of the cylinder block, and the inner ends are inserted into the slider connection grooves of the corresponding sliders.

4. The pneumatic chuck drive mechanism according to claim 3, wherein: Both ends of the lever are round heads, and the round heads can rotate in the cylinder block connection groove, the piston connection groove and the slider connection groove.

5. The pneumatic chuck driving mechanism according to claim 2, characterized in that: Both ends of the lever of one pair of the transmission components are respectively hinged to the piston and the slider, and both ends of the lever of the other pair of the transmission components are respectively hinged to the cylinder block and the slider.

6. The pneumatic chuck driving mechanism according to claim 2, wherein: The fixed pin is fixedly connected to the chuck body.

7. The pneumatic chuck drive mechanism according to claim 1, wherein: A guide sleeve is provided on the upper part of the cylinder block, and the outer side of the guide sleeve abuts against the inner wall surface of the outer sleeve.

8. The pneumatic chuck drive mechanism according to claim 1, characterized in that: The claw assembly includes a slider and a claw. The claw is fixedly connected to the slider. The slider is arranged in the slider guide groove of the chuck body and can reciprocate along the slider guide groove.

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