A stable pneumatic magnetic attraction device

Abstract

The application relates to a stable pneumatic magnetic attraction device which comprises a cylinder (1), a piston (2) and a permanent magnet (3), the cross section of the piston (2) is in the shape of an I-beam, the upper end of the I-beam of the piston (2) is slidably arranged in the cylinder (1), the middle part of the I-beam of the piston (2) is slidably arranged in the outlet at the center of the bottom of the cylinder (1), and the lower end of the I-beam of the piston (2) is slidably arranged in a limiting sleeve (4) fixed at the bottom of the cylinder (1); the permanent magnet (3) is fixed at the lower end of the I-beam of the piston (2); the stable pneumatic magnetic attraction device further comprises a buffer part (5) arranged at the top of the cylinder (1), the buffer part (5) comprises an outer sleeve (501) and a connecting column (502) slidably arranged in the outer sleeve (501), and the top of the connecting column (502) is connected with the outer sleeve (501) through a spring (503). The application has the advantages of simple structure, stable operation of attraction and release, buffering function and small impact on workpieces.

Description

Technical Field

[0001] This invention relates to a stable pneumatic magnetic suction device, belonging to the technical field of mechanical processing and hoisting equipment. Background Technology

[0002] Currently, industrial suction cup devices that utilize adsorption to grasp and release objects mainly employ two structures: vacuum suction cups adsorb onto object surfaces, and magnetic suction cups adsorb ferromagnetic objects. Vacuum suction cups require sufficiently smooth and airtight contact surfaces with a large contact area for adsorption, thus limiting their applicability due to the high requirements for the adsorbed object. Magnetic suction structures are divided into electromagnetic and permanent magnet suction. Electromagnetic suction requires a continuous power input to maintain the suction cup's magnetism, resulting in high energy consumption. Besides heat generation and electrical safety issues, a power outage can cause the adsorbed object to fall, posing a safety risk. Permanent magnet suction, evolving from traditional manual control of magnetic force to pneumatic automatic magnetic control for automated applications, offers fundamental technological advantages such as energy saving and safety, and is gradually replacing electromagnetic suction devices. However, existing pneumatic permanent magnet adsorption devices have movable air chambers above and below the adsorption piston, resulting in poor stability and a high failure rate during the piston's up-and-down movement. In addition, the lack of necessary buffering during adsorption or release causes significant impact on the adsorbed object, which can easily damage the object's precision components, cause dents or scratches on the object's surface, or affect the object's installation and positioning accuracy.

[0003] Chinese patent CN201520844521.5 discloses an integrated pneumatic permanent magnet chuck, which is a piston-type permanent magnet chuck. The integrated piston, which mounts the permanent magnet, is set inside the cylinder. Due to the arrangement of the upper and lower movable air chambers, the integrated piston only contacts the inner wall of the cylinder at the top, causing unstable up and down movement. In addition, the spring only serves to automatically press down and maintain the adsorption function, and cannot play a buffering role.

[0004] Chinese patent CN200620039665.4 discloses a pneumatic permanent magnet chuck device, which installs a permanent magnet at the end of the piston rod of a cylinder. The stability of the cylinder operation is used to ensure the stability of the permanent magnet during its up-and-down movement. However, its structure is complex, and although it is equipped with a soft pad that provides limited local cushioning, it does not fundamentally solve the impact problem when adsorbing or releasing objects. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a stable pneumatic magnetic adsorption device with a simple structure, stable operation during the adsorption and release process, and effective buffering function.

[0006] The objective of this invention is achieved as follows: A stable pneumatic magnetic attraction device includes a cylinder, a piston, and a permanent magnet. The piston has an I-shaped cross-section. The upper end of the piston is slidably disposed inside the cylinder, dividing the cylinder into upper and lower chambers. The middle part of the piston is slidably disposed in the outlet at the center of the bottom of the cylinder. The lower end of the piston is slidably disposed in a limiting sleeve fixed to the bottom of the cylinder. The bottom of the limiting sleeve is provided with a gasket for sealing. The permanent magnet is fixed to the lower end of the piston's I-shape. The stable pneumatic magnetic attraction device also includes a buffer part disposed at the top of the cylinder. The buffer part includes an outer sleeve and a connecting column slidably disposed inside the outer sleeve. The bottom of the connecting column is connected to the top of the cylinder, and the top of the connecting column is connected to the outer sleeve by a spring.

[0007] The present invention provides a stable pneumatic magnetic suction device, wherein both the upper and lower air chambers are provided with air pipe interfaces.

[0008] The present invention provides a stable pneumatic magnetic attraction device, wherein the permanent magnet is fixed to the lower end face of the piston by countersunk bolts.

[0009] The present invention provides a stable pneumatic magnetic suction device, wherein the top of the outer casing is provided with a top cover, and the spring connects the top cover and the connecting column.

[0010] The present invention provides a stable pneumatic magnetic suction device, wherein the outer sleeve is provided with a limit hole on its side and a limit pin is provided on the connecting column; the limit pin is slidably disposed in the limit hole to limit the movement stroke of the connecting column.

[0011] The present invention provides a stable pneumatic magnetic attraction device, wherein the gasket is an aluminum gasket.

[0012] The present invention provides a stable pneumatic magnetic suction device, wherein the limiting sleeve is made of pure iron.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention features an I-shaped piston with a pneumatically controlled air chamber located at the top and a limiting sleeve at the bottom, ensuring stability during piston movement. A buffer section connected to the top of the cylinder provides cushioning against impacts during the adsorption or release process, resulting in stable adsorption and release with minimal impact vibration. This prevents damage to the precision components and adsorption surface of the adsorbed object and avoids affecting the installation and positioning accuracy of the adsorbed object. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a stable pneumatic magnetic suction device according to the present invention.

[0015] Figure 2 This is a cross-sectional structural schematic diagram of a stable pneumatic magnetic suction device according to the present invention.

[0016] in: 1. Cylinder; 2. Piston; 3. Permanent magnet; 4. Limiting sleeve; 5. Buffer part; 6. Gasket. 101 endotracheal inlet, 501 outer sleeve, 502 connecting post, 503 spring, 504 top cover, 505 limiting hole, 506 limiting pin. Detailed Implementation

[0017] See Figures 1-2 This invention relates to a stable pneumatic magnetic attraction device, comprising a cylinder 1, a piston 2, and a permanent magnet 3. The piston 2 has an I-shaped cross-section, with the upper end of the I-shape slidably disposed within the cylinder 1, dividing the cylinder 1 into upper and lower chambers. Both the upper and lower chambers are equipped with air pipe interfaces 101. The middle part of the I-shape of the piston 2 is slidably disposed in the outlet at the center of the bottom of the cylinder 1, and the lower end of the I-shape of the piston 2 is slidably disposed in a limiting sleeve 4 fixed to the bottom of the cylinder 1. The bottom of the limiting sleeve 4 is sealed with an aluminum gasket 6, and the limiting sleeve 4 is made of pure iron. The permanent magnet 3 is fixed by countersunk bolts. The device is mounted on the lower end face of the piston 2 in an I-shape. The stable pneumatic magnetic suction device also includes a buffer part 5 set on the top of the cylinder 1. The buffer part 5 includes an outer sleeve 501 and a connecting column 502 slidably set in the outer sleeve 501. The bottom of the connecting column 502 is connected to the top of the cylinder 1. The top of the outer sleeve 501 is provided with a top cover 504. The top cover 504 and the connecting column 502 are connected by a spring 503. The side of the outer sleeve 501 is provided with a limit hole 505. The connecting column 502 is provided with a limit pin 506. The limit pin 506 is slidably set in the limit hole 505 to limit the movement stroke of the connecting column 502.

[0018] Pneumatic magnetic attraction working principle: When the upper air chamber of cylinder 1 is connected to the air source, it pushes piston 2 to move down and drives permanent magnet 3 to descend. When permanent magnet 3 moves to the bottom, it can attract parts. When the upper air chamber is cut off and the lower air chamber is connected to the air source, piston 2 moves up and drives permanent magnet 3 to rise. When permanent magnet 3 moves to the top, the parts lose the magnetic force and can automatically separate from the pneumatic magnetic attraction.

[0019] The piston 2's I-shaped structure is controlled and limited by cylinder 1 and limit sleeve 4 to move up and down, ensuring that the piston 2's up and down movement is stable and reliable; the buffer part 5 uses the buffering effect of spring 503 to reduce the impact vibration when adsorbing and releasing parts, thus protecting the parts; the magnitude of the adsorption magnetic force is controlled by adjusting the thickness of aluminum gasket 6; the limit sleeve 4 made of pure iron plays an isolation and protection role; the air passages of the upper and lower air chambers can be controlled by solenoid valves and can be automated.

[0020] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A stable pneumatic magnetic attraction device, comprising a cylinder (1), a piston (2), and a permanent magnet (3), characterized in that: The piston (2) has an I-shaped cross-section. The upper end of the piston (2) is slidably disposed in the cylinder (1), dividing the cylinder (1) into upper and lower chambers. The middle part of the piston (2) is slidably disposed in the outlet at the bottom center of the cylinder (1). The lower end of the piston (2) is slidably disposed in the limiting sleeve (4) fixed at the bottom of the cylinder (1). The bottom of the limiting sleeve (4) is sealed with a gasket (6). The permanent magnet (3) is fixedly disposed at the lower end of the piston (2). The stable pneumatic magnetic attraction device also includes a buffer part (5) disposed at the top of the cylinder (1). The buffer part (5) includes an outer sleeve (501) and a connecting column (502) slidably disposed in the outer sleeve (501). The bottom of the connecting column (502) is connected to the top of the cylinder (1), and the top is connected to the outer sleeve (501) by a spring (503).

2. The stable pneumatic magnetic attraction device according to claim 1, characterized in that: Both the upper and lower air chambers are equipped with air pipe interfaces (101).

3. The stable pneumatic magnetic attraction device according to claim 1, characterized in that: The permanent magnet (3) is fixed to the lower end face of the piston (2) by countersunk bolts.

4. The stable pneumatic magnetic attraction device according to claim 1, characterized in that: The top of the outer casing (501) is provided with a top cover (504), and the spring (503) connects the top cover (504) and the connecting post (502).

5. The stable pneumatic magnetic attraction device according to claim 1, characterized in that: The outer sleeve (501) is provided with a limiting hole (505) on its side, and a limiting pin (506) is provided on the connecting column (502); the limiting pin (506) is slidably disposed in the limiting hole (505) to limit the movement of the connecting column (502).

6. The stable pneumatic magnetic attraction device according to claim 1, characterized in that: The gasket (6) is an aluminum gasket.

7. The stable pneumatic magnetic attraction device according to claim 1, characterized in that: The limiting sleeve (4) is made of pure iron.

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