Pneumatic Detection Device for Confirming Cylinder Clamping and Releasing

Abstract

The present invention belongs to the technical field of detection devices, and relates to a pneumatic detection device for confirming the clamping and releasing of an oil cylinder, which comprises a mounting seat, a cylinder body embedded in the mounting seat, and a piston rod that expands and contracts in the piston cavity of the cylinder body; the cross-section of the part of the cylinder body exposed from the mounting seat is larger than the cross-section shape of the part embedded in the mounting seat, and the part embedded in the mounting seat is provided with a clamping detection hole and a relaxation detection hole that penetrate from the outside to the piston cavity, and the clamping detection hole is closer to the upper part of the cylinder body than the relaxation detection hole; the piston rod includes a piston section with a larger outer diameter and an extending section with a smaller outer diameter. The piston section has an axial hole communicating with the lower outlet of the piston cavity and lateral holes that can communicate with the clamping detection hole and the relaxation detection hole respectively, and the axial hole and the lateral hole are communicated inside the piston rod. This device can characterize the working state of the oil cylinder by testing the pressures of the two detection holes in the two states of the oil cylinder being clamped and relaxed.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly relates to a pneumatic detection device for confirming the clamping and releasing of an oil cylinder. Background Art

[0002] When an automated fixture is working, the manipulator needs to monitor the clamping and releasing states of the oil cylinder in real time for picking and placing workpieces. If it fails to clamp when it should or fails to release when it should, it will cause improper picking and placing of workpieces, leading to risks. Therefore, it is necessary to design a supporting device to monitor the state of a common oil cylinder. Summary of the Invention

[0003] The purpose of the present invention is to provide a pneumatic detection device for confirming the clamping and releasing of an oil cylinder, which can monitor the clamping and releasing states of the oil cylinder by using air pressure.

[0004] The present invention realizes the above purpose through the following technical solutions: A pneumatic detection device for confirming the clamping and releasing of an oil cylinder includes a mounting base, a cylinder body embedded in the mounting base, and a piston rod that expands and contracts in the piston cavity of the cylinder body; the cross-section of the part of the cylinder body exposed outside the mounting base is larger than the cross-section shape of the part embedded in the mounting base, and the part embedded in the mounting base is provided with a clamping detection hole and a releasing detection hole that penetrate from the outside to the piston cavity, and the clamping detection hole is closer to the upper part of the cylinder body than the releasing detection hole; the mounting base has an upper hole communicating with the clamping detection hole, a middle hole communicating with the releasing detection hole, and a lower hole communicating with the lower opening of the piston cavity; the piston rod includes a piston section with a larger outer diameter and a protruding section with a smaller outer diameter, the piston section has an axial hole communicating with the lower outlet of the piston cavity and lateral holes that can communicate with the clamping detection hole and the releasing detection hole respectively, and the axial hole and the lateral hole communicate inside the piston rod.

[0005] Specifically, the cylinder body is composed of a lower cylinder body embedded in the mounting base and a cover plate located outside the mounting base. The lower cylinder body has a lower shaft hole with an inner diameter matching the outer diameter of the piston section, and the cover plate has an upper shaft hole with an inner diameter matching the protruding section.

[0006] Further, the lower cylinder body has three outer concave rings respectively arranged above the clamping detection hole, between the clamping detection hole and the releasing detection hole, and below the releasing detection hole. An O-ring that closely adheres to the inner wall of the mounting base is accommodated in the outer concave ring.

[0007] Further, an inner concave ring is provided inside the cover plate, and an O-ring that closely adheres to the piston rod is accommodated in the inner concave ring.

[0008] Specifically, a large concave ring is further provided above the inner concave ring of the cover plate, and a dust ring that closely adheres to the piston rod is accommodated in the large concave ring.

[0009] Specifically, two concave rings are provided on the outer periphery of the piston section, and Glide rings that closely adhere to the inner wall of the cylinder body are accommodated in the concave rings.

[0010] Specifically, a connector is fixedly attached to the top of the piston rod by threading.

[0011] The beneficial effects of adopting the above technical solution are as follows:

[0012] This device can characterize the working state of the oil cylinder by measuring the pressures at two detection holes in the clamping and relaxing states of the test oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Full cross-sectional view of the pneumatic pressure detection device for oil cylinder clamping and releasing confirmation in the embodiment;

[0014] Figure 2 Integral three-dimensional view of the cylinder block and the piston rod;

[0015] Figure 3 Connection diagram of the cylinder block, piston and oil cylinder;

[0016] Figure 4 Cross-sectional view of the pneumatic pressure detection device when the oil cylinder is in the clamped state;

[0017] Figure 5 Cross-sectional view of the pneumatic pressure detection device when the oil cylinder is in the relaxed state;

[0018] Figure 6 Pneumatic pressure detection pipeline diagram.

[0019] The numbers in the figures represent:

[0020] 1 - mounting base, 11 - upper hole, 12 - middle hole, 13 - lower hole;

[0021] 2 - cylinder block, 21 - lower cylinder block, 211 - piston cavity, 212 - clamping detection hole, 213 - relaxation detection hole, 214 - outer concave ring, 22 - cover plate, 23a, 23b - O-ring, 24 - dust ring;

[0022] 3 - piston rod, 31 - piston section, 311 - axial hole, 32 - extended section, 321 - lateral hole, 33 - connector, 34 - Gleitring;

[0023] 4 - oil cylinder, 41 - connecting rod, 42 - handle;

[0024] 51 - air source, 52 - filter, 53 - pressure reducing valve, 54 - pressure gauge, 55a - clamping detection branch, 55b - relaxation detection branch, 56 - drain pipe, 57a - air sensor, 57b - air sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] As Figures 1 to 6As shown in the figure, a pneumatic detection device for cylinder clamping and releasing confirmation of the present invention includes a mounting base 1, a cylinder body 2 embedded in the mounting base 1, and a piston rod 3 that expands and contracts in a piston chamber 211 of the cylinder body 2; the cross-section of the part of the cylinder body 2 exposed from the mounting base 1 is larger than the cross-section shape of the part embedded in the mounting base 1, and the part embedded in the mounting base 1 is provided with a clamping detection hole 212 and a relaxation detection hole 213 that penetrate from the outside to the piston chamber 211, and the clamping detection hole 212 is closer to the upper part of the cylinder body 2 than the relaxation detection hole 213; the mounting base 1 has an upper hole 11 communicating with the clamping detection hole 212, a middle hole 12 communicating with the relaxation detection hole 213, and a lower hole 13 communicating with the lower opening of the piston chamber 211; the piston rod 3 includes a piston section 31 with a larger outer diameter and an extending section 32 with a smaller outer diameter, the piston section 31 has an axial hole 311 communicating with the lower outlet of the piston chamber 211 and a lateral hole 321 that can communicate with the clamping detection hole 212 and the relaxation detection hole 213 respectively, and the axial hole 311 and the lateral hole 321 communicate inside the piston rod 3. The upper hole 11 is used for injecting gas and detecting the clamping air pressure, the middle hole 12 is used for injecting gas and detecting the relaxation air pressure, and the lower hole 13 is used for exhausting the piston chamber 211. A connection head 31 is fixed to the top of the piston rod 3 by threads. The main shaft of the oil cylinder 4 can be connected to the connection head 31 through a connecting rod 41 and the clamping and releasing can be controlled by a handle 42. The axial hole 211 and the lateral hole 321 form an air circuit that can switch between two states. When the handle 42 is pressed down, the oil cylinder 4 is in the clamping state, and the piston rod 3 is pulled outwards. At this time, the piston section 31 blocks the clamping detection hole 212, and the relaxation detection hole 213 communicates with the air circuit from the middle hole 12 to the lower hole 13. Therefore, the pressure should be detected to increase at the upper hole 11, and the pressure at the middle hole 12 decreases; when the handle 42 is lifted, the oil cylinder 4 is in the relaxation state, and the piston rod 3 is pushed inwards. At this time, the piston section 31 blocks the relaxation detection hole 213, and the clamping detection hole 212 communicates with the air circuit from the upper hole 11 to the lower hole 13. Therefore, the pressure should be detected to decrease at the upper hole 11, and the pressure at the middle hole 12 increases.

[0026] As Figure 6It shows the positional relationship of the air pressure detection device in the entire detection pipeline. Two states of the air pressure detection device are drawn in parallel on the same diagram. The detection system includes a gas source 51, a filter 52, a pressure reducing valve 53, and a pressure gauge 54 connected in series in the main pipeline. The main pipeline is divided into a clamping detection branch 55a communicating with the clamping detection hole 212 and a relaxation detection branch 55b connecting to the relaxation detection hole 213. The ends of the clamping detection branch 55a and the relaxation detection branch 55b are emptied, and there is another emptying pipe 56 below the cylinder block 2 for emptying. An air sensor 57a is provided on the clamping detection branch 55a, and an air sensor 57b is provided on the relaxation detection branch 55b. During detection, the compressed air from the gas source 51 is purified by the filter 52 and then supplied to the two detection holes 212 and 213 through the two branches 55a and 55b. Under the indication of the pressure gauge 54, the worker uses the pressure reducing valve 53 to adjust the pressure of the compressed air to the maximum pressure required for detection. When clamping starts, the piston rod 3 blocks the clamping detection branch 55a. Normally, the air sensor 57a will detect that the pressure rises to the set maximum pressure, while the air sensor 57b will normally detect that the pressure is at a low value close to the atmospheric pressure. When relaxation starts, the piston rod 3 blocks the relaxation detection branch 55b. Normally, the air sensor 57b will detect that the pressure rises to the set maximum pressure, while the air sensor 57a will normally detect that the pressure is at a low value close to the atmospheric pressure. Therefore, this device can characterize the working state of the oil cylinder by testing the pressures of the two detection holes 212 and 213 in the two states of clamping and relaxation of the oil cylinder 4.

[0027] As Figures 1 to 3 shown, the cylinder block 2 is composed of a lower cylinder block 21 embedded in the mounting seat 1 and a cover plate 22 located outside the mounting seat 1. The lower cylinder block 21 has a lower shaft hole (not marked) with an inner diameter matching the outer diameter of the piston section 31, and the cover plate 22 has an upper shaft hole (not marked) with an inner diameter matching the protruding section 32. Since the cross-section of the piston section 31 is larger than that of the protruding section 32, there will be a gap in the piston chamber 211 for air to enter and exit. At the same time, the lower shaft hole is larger than the upper shaft hole, so the piston rod 3 can only expand and contract within a limited space and will not fall out of the cylinder block 2.

[0028] As Figure 1 and Figure 2 shown, the lower cylinder block 21 has three outer concave rings 214 respectively located above the clamping detection hole 212, between the clamping detection hole 212 and the relaxation detection hole 213, and below the relaxation detection hole 213. The outer concave rings 214 house O-ring seals 23a closely attached to the inner wall of the mounting seat 1. The three O-ring seals 23a can prevent air leakage caused by the inability to seal the contact surface between the lower cylinder block 21 and the mounting seat 1, so as to avoid misjudgment.

[0029] As Figure 1As shown, an inner concave ring (not labeled) is provided inside the cover plate 22, and an O-ring 23b that closely adheres to the piston rod 3 is accommodated inside the inner concave ring. The O-ring 23b here can prevent the generation of air leakage channels between the contact surfaces of the piston rod 3 and the cover plate 22.

[0030] As Figure 1 shown, the cover plate 22 is further provided with a large concave ring (not labeled) above the inner concave ring, and a dust ring 24 that closely adheres to the piston rod 3 is accommodated inside the large concave ring. The dust ring 24 can prevent external cutting fluid and iron filings from entering the interior of the structure and causing jamming.

[0031] As Figure 1 shown, two concave rings (not labeled) are provided on the outer periphery of the piston section 31, and a Gleitring 34 that closely adheres to the inner wall of the cylinder block 2 is accommodated inside the concave rings. The Gleitring 34 is a dynamic seal that can ensure excellent low-friction and high-speed performance.

[0032] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A pneumatic detection device for cylinder clamping and releasing confirmation, characterized in that: It includes a mounting base, a cylinder body embedded in the mounting base, and a piston rod that telescopically moves in the piston cavity of the cylinder body; the cross-section of the part of the cylinder body exposed from the mounting base is larger than the cross-section shape of the part embedded in the mounting base, and the part embedded in the mounting base is provided with a clamping detection hole and a relaxation detection hole that penetrate from the outside to the piston cavity, and the clamping detection hole is closer to the upper part of the cylinder body than the relaxation detection hole; the mounting base has an upper hole communicating with the clamping detection hole, a middle hole communicating with the relaxation detection hole, and a lower hole communicating with the lower opening of the piston cavity; the piston rod includes a piston section with a larger outer diameter and a protruding section with a smaller outer diameter, the piston section has an axial hole communicating with the lower outlet of the piston cavity and lateral holes that can communicate with the clamping detection hole and the relaxation detection hole respectively, and the axial hole and the lateral holes communicate with each other inside the piston rod; the cylinder body is composed of a lower cylinder body embedded in the mounting base and a cover plate located outside the mounting base, the lower cylinder body has a lower shaft hole with an inner diameter matching the outer diameter of the piston section, and the cover plate has an upper shaft hole with an inner diameter matching the protruding section; a connector is fixedly screwed to the top of the piston rod.

2. The air pressure detection device for cylinder clamping and releasing confirmation according to claim 1, wherein: The lower cylinder body has three outer concave rings respectively arranged above the clamping detection hole, between the clamping detection hole and the relaxation detection hole, and below the relaxation detection hole, and an O-ring that closely adheres to the inner wall of the mounting base is accommodated in the outer concave ring.

3. The air pressure detection device for cylinder clamping and releasing confirmation according to claim 1, characterized in that: An inner concave ring is provided inside the cover plate, and an O-ring that closely adheres to the piston rod is accommodated in the inner concave ring.

4. The air pressure detection device for cylinder clamping and releasing confirmation according to claim 1, wherein: The cover plate further has a large concave ring above the inner concave ring, and a dust ring that closely adheres to the piston rod is accommodated in the large concave ring.

5. The air pressure detection device for cylinder clamping and releasing confirmation according to claim 1, wherein: Two concave rings are provided on the outer periphery of the piston section, and a Gleitring that closely adheres to the inner wall of the cylinder body is accommodated in the concave ring.

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