Dustproof air cylinder with valve

Abstract

The utility model discloses a dustproof air cylinder with a valve, which belongs to the technical field of air cylinders and comprises an air cylinder body, a mounting cavity is arranged in the air cylinder body, a piston rod and a piston are arranged in the mounting cavity through riveting connection, and a front cover is mounted at the piston rod end of the air cylinder body through a retaining ring. A stepped hole is formed in the position, close to the outer side end, of the front cover, a dustproof base is arranged between the retaining ring and the front cover and abuts against the front cover, a check ring is arranged between the dustproof base and the front cover, and a scraping sleeve is arranged between the dustproof base and the check ring. Dust, cotton fibers and other tiny impurities in the environment are effectively isolated, the service life of an air cylinder is prolonged, the structure is simple, installation is convenient, and machining and assembling are convenient.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, and in particular to a dustproof cylinder with a valve. Background Technology

[0002] In modern industrial production, cylinders, as common actuators, are widely used in various automated equipment and mechanical devices. Valve-equipped cylinders are an integrated design, and existing valve-equipped cylinders typically rely solely on simple sealing rings to prevent dust and impurities from entering the front cover. While this design can prevent dust entry to some extent, its effectiveness against fine impurities such as dust and lint from the environment is very limited. Over long-term use, due to frequent mechanical movement and environmental factors, the sealing performance of the sealing ring gradually declines. When dust and lint enter the front cover, they accelerate the wear of the sealing ring, leading to a further decrease in sealing performance.

[0003] Chinese Patent Publication No. CN221401189U, Publication Date: July 23, 2024, discloses a utility model called a valve-equipped cylinder, comprising: a plastic cylinder barrel with an internal mounting cavity; a plastic front cover disposed at one end of the plastic cylinder barrel; a threaded structure disposed between the plastic front cover and the plastic cylinder barrel, the plastic front cover being connected to the plastic cylinder barrel via the threaded structure; and a second groove provided on the plastic front cover, with a second sealing ring disposed within the second groove. This valve-equipped cylinder's front cover only provides dust protection through a sealing ring, lacking an effective dustproof design, which may allow fine impurities to enter the interior. Utility Model Content

[0004] This utility model provides a dustproof cylinder with a valve. By setting a dustproof seat and a scraper sleeve, the front cover is dustproofed, effectively isolating dust and fine impurities such as lint from the environment and extending the service life of the cylinder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dustproof cylinder with a valve, comprising a cylinder body, an installation cavity provided inside the cylinder body, a piston rod and a piston connected by riveting and disposed in the installation cavity, and a front cover installed on the piston rod end of the cylinder body by a buckle; a dustproof seat is provided between the buckle and the front cover, the dustproof seat abuts against the front cover, a retaining ring is provided between the dustproof seat and the front cover, and a scraping sleeve is provided between the dustproof seat and the retaining ring.

[0006] Preferably, the front cover has a stepped hole near its outer end, into which the dust cover extends and abuts against the front cover. A retaining ring is positioned within the stepped hole of the front cover. The dust cover abuts against the inner wall of the mounting cavity but does not contact the piston rod. The dust cover's insertion into the stepped hole and abutting against the front cover ensures a proper fit, reducing the possibility of gas leakage. The dust cover's contact with the inner wall of the mounting cavity, but not with the piston rod, avoids unnecessary friction, reduces wear, and extends the service life of the dust cover. The retaining ring further enhances the structural stability between the front cover and the piston rod, ensuring the reliability of the cylinder during high-frequency operation.

[0007] Preferably, the inner side of the retaining ring abuts against the bottom of the stepped hole in the front cover, and the outer side of the retaining ring abuts against the inner side of the dust cover. The retaining ring and the piston rod do not contact each other. This avoids direct friction between the piston rod and the retaining ring during operation, reduces wear, and extends the service life of the piston rod. This design ensures the reliability and stability of the cylinder during long-term use.

[0008] Preferably, a first sealing ring is provided between the retaining ring and the front cover. The first sealing ring ensures a tight seal between the front cover and the piston rod.

[0009] Preferably, the end face of the dust cover abuts against the end face of the front cover, and the inner side of the first sealing ring contacts the inner side of the retaining ring. This ensures that the seal does not move significantly back and forth during long-term use of the cylinder, and that the sealing performance does not decrease due to wear, thus improving the reliability and stability of the equipment.

[0010] Preferably, the outer side of the front cover has a groove, and a second sealing ring is provided in the groove, positioned between the front cover and the mounting cavity. The inner side of the second sealing ring contacts the front cover, and the outer side contacts the dust cover, which is preferably a plastic dust cover. The second sealing ring ensures a tight seal between the front cover and the mounting cavity, reducing the possibility of gas leakage.

[0011] Preferably, one end of the piston has a mounting groove, and an anti-collision ring is installed within the mounting groove, positioned between the piston and the inner wall of the mounting cavity. The anti-collision ring effectively reduces the impact between the piston and the inner wall of the mounting cavity, protecting the surfaces of both and extending the cylinder's service life. This design optimizes the structure between the piston and the mounting cavity, reducing vibration and impact during piston movement and improving the cylinder's operational smoothness.

[0012] Preferably, the outer wall of the piston has a first groove, and a wear-resistant ring is provided within the first groove, positioned between the piston and the inner wall of the mounting cavity. The wear-resistant ring effectively reduces wear between the piston and the inner wall of the mounting cavity, protecting the surfaces of both and extending the cylinder's service life. The wear-resistant ring design ensures the reliability of the piston during high-frequency operation and reduces the decrease in sealing performance caused by wear. This design optimizes the structure between the piston and the mounting cavity, reduces friction generated during piston movement, and improves the cylinder's operating efficiency.

[0013] Preferably, the piston has a second groove on one side of the wear ring, and a piston sealing ring is installed in the second groove, positioned between the piston and the mounting cavity. The piston sealing ring ensures a tight seal between the piston and the mounting cavity, reducing the possibility of gas leakage.

[0014] Preferably, the cylinder body is made of metal, and the solenoid valve is mounted on the cylinder body. The metal cylinder body possesses high strength and good durability, can withstand significant working pressure, and is suitable for various harsh working environments. It can also withstand a certain amount of lateral force during installation and use.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a dustproof cylinder with a valve. By setting a dustproof seat and a scraper sleeve, the front cover is dustproofed, effectively isolating dust and fine impurities such as lint from the environment and extending the service life of the cylinder. The structure is simple and installation is convenient: the cylinder body and the front cover are connected by a snap ring, and the piston rod and piston are riveted together, making processing and assembly convenient; the cylinder body is made of metal, which can withstand a certain lateral force during installation and use. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a cross-sectional view of the front cover of this utility model.

[0019] Figure 4 This is a cross-sectional view of the piston assembly of this utility model.

[0020] Reference numerals in the attached drawings: 1: Cylinder body; 2: Mounting cavity; 3: Piston; 4: Piston rod; 5: Front cover; 6: Buckle ring; 7: Dustproof seat; 8: Scraper sleeve; 9: Retaining ring; 10: Groove; 11: First sealing ring; 12: Second sealing ring; 13: Mounting groove; 14: Anti-collision ring; 15: First groove; 16: Wear-resistant ring; 17: Second groove; 18: Piston sealing ring; 19: Solenoid valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In industrial production, cylinders, as common actuators, are widely used in various automated equipment and mechanical devices. However, harsh working environments often pose numerous challenges to the normal operation of cylinders, among which the intrusion of fine impurities such as dust and lint is a significant factor affecting cylinder lifespan. This utility model's dustproof cylinder with valve, through innovative structural design, effectively solves this problem, providing a reliable guarantee for the stable operation of cylinders in complex environments.

[0023] like Figure 1 and Figure 2 As shown, this dustproof valve cylinder mainly consists of a cylinder body 1, a front cover 5, a piston rod 4, a piston 3, and a series of auxiliary sealing and protective components. The cylinder body 1 has an internal mounting cavity 2. The piston rod 4 and piston 3 are riveted together within the mounting cavity 2. This connection method ensures both a strong connection and relatively convenient processing and assembly. The front cover 5 is mounted to the piston rod 4 end of the cylinder body 1 via a retaining ring 6, achieving a simple and stable assembly method in terms of connection structure. Regarding dustproof design, the dustproof seat 7 and scraper sleeve 8 located between the retaining ring 6 and the front cover 5 together constitute a highly efficient dustproof system, effectively isolating impurities in the environment and extending the cylinder's service life.

[0024] like Figure 2 and Figure 3 As shown, the dust cover 7 is positioned between the retaining ring 6 and the front cover 5. In industrial workshops with high dust levels, such as cement plants and textile mills, if the seal between the cylinder piston rod 4 and the front cover 5 is poor, dust can easily leak into the cylinder along with the gas, accelerating the wear of internal cylinder parts. This design, through the tight contact between the dust cover 7 and the scraper sleeve 8, forms an effective dustproof system. Simultaneously, the dust cover 7 abuts against the inner wall of the mounting cavity 2, but does not contact the piston rod 4. This design avoids unnecessary friction, reduces wear on the dust cover 7, and thus extends its service life. In practical applications, this extends the service life of the dust cover 7 and reduces equipment maintenance costs.

[0025] like Figure 3As shown, the cylinder structure of this invention innovatively incorporates a scraper sleeve 8 between the dust cover 7 and the front cover 5. This scraper sleeve 8 is preferably made of a material with excellent wear resistance, and its inner diameter maintains a precise fit with the outer diameter of the piston rod 4. The main function of the scraper sleeve 8 is to effectively scrape away dust, oil, and other mechanical impurities adhering to the surface of the piston rod 4 during its reciprocating motion, through close contact between its inner wall and the surface of the piston rod 4. This design not only prevents contaminants from the external environment from entering the cylinder but also significantly reduces wear between the piston rod 4 and the seals. Especially in dusty industrial environments such as textiles and woodworking, the scraper sleeve 8 provides excellent isolation for airborne dust particles and lint-like impurities, effectively preventing these impurities from intruding into the front cover 5, avoiding wear and damage to the main seals, and thus extending the service life of the cylinder.

[0026] The mounting structure of the retaining ring 9 is meticulously designed on the dust cover 7 and the front cover 5. Of particular note is the radial clearance maintained between the retaining ring 9 and the piston rod 4. This non-contact design ensures the freedom of movement of the piston rod 4 while avoiding unnecessary frictional wear. The retaining ring 9 offers multiple technical advantages: First, it significantly enhances the structural stability between the front cover 5 and the piston rod 4, improving the axial stiffness of the entire cylinder; second, the retaining ring 9 and the scraper sleeve 8 form an effective dustproof system, improving the cylinder's dustproof rating; finally, the retaining ring 9 effectively disperses the lateral force of the piston rod 4, reducing uneven wear on the seals and further extending the cylinder's service life.

[0027] like Figure 3 As shown, a first sealing ring 11 is provided between the retaining ring 9 and the front cover 5. The first sealing ring 11 ensures the sealing between the front cover 5 and the piston rod 4, reduces the possibility of gas leakage, and improves the reliability and stability of the equipment.

[0028] like Figure 3 As shown, the front cover 5 has a groove 10 on the side away from the piston rod 4, and a second sealing ring 12 is provided in the groove 10. The second sealing ring 12 is located between the front cover 5 and the mounting cavity 2, with its inner side contacting the front cover 5 and its outer side contacting the dust cover 7. The second sealing ring 12 ensures the sealing between the front cover and the mounting cavity, reducing the possibility of gas leakage.

[0029] like Figure 4As shown, piston 3 has a mounting groove 13 at one end, and an anti-collision ring 14 is installed inside the mounting groove 13, positioned between piston 3 and the inner end wall of mounting cavity 2. During cylinder operation, piston 3 reciprocates at high speed within mounting cavity 2. When piston 3 reaches the end of its stroke, it collides with the inner end wall of mounting cavity 2. The anti-collision ring 14 effectively reduces the impact between piston 3 and the inner end wall of mounting cavity 2, protecting the surfaces of piston 3 and mounting cavity 2. For example, in high-frequency cylinder applications, such as stamping equipment in automobile manufacturing, the reciprocating frequency of piston 3 can reach hundreds of times per minute. Without the protection of the anti-collision ring 14, the surfaces of piston 3 and mounting cavity 2 are easily damaged by frequent impacts. With the anti-collision ring 14 design, the impact energy between piston 3 and the inner end wall of mounting cavity 2 is effectively buffered, significantly improving the operational stability of the equipment and extending the service life of the cylinder.

[0030] like Figure 4 As shown, the outer wall of the piston 3 has a first groove 15, and a wear-resistant ring 16 is provided in the first groove 15. The wear-resistant ring 16 is located between the piston 3 and the inner wall of the mounting cavity 2. During the reciprocating motion of the piston 3, the wear-resistant ring 16 can effectively reduce the wear between the piston 3 and the inner wall of the mounting cavity 2, protecting the surfaces of the piston 3 and the mounting cavity 2. In practical applications, due to the presence of the wear-resistant ring 16, the coefficient of friction between the piston 3 and the inner wall of the mounting cavity 2 is reduced, and the operating efficiency is improved. For example, in a food packaging machine, the use of the wear-resistant ring 16 reduces the energy consumption of the cylinder, extends the maintenance cycle of the equipment, and reduces maintenance costs.

[0031] like Figure 4 As shown, the piston 3 has a second groove 17 on one side of the wear ring 16, and a piston sealing ring 18 is installed in the second groove 17, positioned between the piston 3 and the mounting cavity 2. The piston sealing ring 18 ensures a tight seal between the piston and the mounting cavity, reducing the possibility of gas leakage. In applications with extremely high gas sealing requirements, such as vacuum packaging equipment in the pharmaceutical industry, the excellent sealing performance of the piston sealing ring 18 ensures the normal operation of the equipment and avoids product quality problems caused by gas leakage.

[0032] The cylinder body 1 is made of metal, typically high-strength materials such as aluminum alloy or stainless steel. The metal cylinder body 1 possesses high strength and good durability, capable of withstanding significant working pressure and suitable for various harsh working environments. During installation and use, the metal cylinder body 1 can withstand a certain amount of lateral force, enabling the cylinder to operate stably in complex mechanical structures. For example, in some automated handling equipment, the cylinder needs to complete the handling operation while withstanding a certain lateral force; the metal cylinder body 1 can meet this requirement, ensuring the reliable operation of the equipment. Furthermore, a solenoid valve 19 is installed on the cylinder body 1, facilitating precise control of the cylinder's movement and fulfilling various action requirements in automated production processes.

[0033] The working principle of this valved cylinder is as follows.

[0034] This valved cylinder, as a key pneumatic actuator, plays a vital role in various automated equipment and mechanical systems. Its working principle is based on pneumatic drive and precise control of the solenoid valve 19. Through ingenious air circuit design and coordinated operation of components, it achieves precise extension and retraction of the piston rod 4 and the piston assembly.

[0035] Solenoid valve 19, as the core control component for the operation of the valved cylinder, has a P port at its top, which is the gas inlet for the entire system. When solenoid valve 19 is in its initial, un-energized state, the internal valve core position allows the P port to connect with the front chamber of the cylinder, while the rear chamber of the cylinder connects to the exhaust port of solenoid valve 19. At this time, compressed air entering from the P port flows rapidly into the front chamber of the cylinder along the air path. Due to the pressure of the gas, a force is generated in the front chamber of the cylinder that pushes the piston 3 forward. Simultaneously, the gas in the rear chamber of the cylinder is smoothly discharged into the atmosphere through the exhaust port of solenoid valve 19. Under this pressure difference, the piston rod 4 and piston assembly are subjected to a forward thrust and begin to retract along the inner wall of the cylinder. This process... Figure 2 It is clearly displayed in the middle.

[0036] When solenoid valve 19 is energized, its internal electromagnetic structure changes, and the position of the valve core changes accordingly. At this time, port P is connected to the rear chamber of the cylinder, while the front chamber of the cylinder is connected to the exhaust port of solenoid valve 19. The compressed air entering from port P flows to the rear chamber of the cylinder, accumulating pressure and creating a force that pushes piston 3 backward. At the same time, the gas in the front chamber of the cylinder is discharged through the exhaust port of solenoid valve 19. Under this new pressure difference, piston rod 4 and piston assembly are subjected to a backward thrust and begin to extend forward along the inner wall of the cylinder.

[0037] This utility model's dustproof cylinder with valve effectively solves the problem of short service life of traditional cylinders in environments with dust and fine impurities, through innovative dustproof structural design, optimized piston 3 related structure, and high-strength cylinder body 1 design. In practical applications, this cylinder exhibits many advantages such as simple structure, convenient installation, good sealing performance, wear resistance, and durability, meeting the diverse needs of different industries. Whether in harsh industrial production environments such as textiles and mines, or in precision manufacturing fields with extremely high requirements for equipment stability and reliability, this dustproof cylinder with valve has broad application prospects.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A dustproof cylinder with a valve, characterized in that, Includes a cylinder body with an internal mounting cavity, and a front cover is mounted to the piston rod end of the mounting cavity via a buckle; A dust cover is provided between the buckle and the front cover. The dust cover abuts against the front cover. A retaining ring is provided between the dust cover and the front cover. A scraping sleeve is provided between the dust cover and the retaining ring.

2. A dustproof cylinder with a valve according to claim 1, characterized in that, The front cover has a stepped hole near the outer end, the dust cover extends into the stepped hole and abuts against the front cover, and the retaining ring is set in the stepped hole of the front cover.

3. A dustproof cylinder with a valve according to claim 1 or 2, characterized in that, The inner side of the retaining ring abuts against the bottom of the step hole in the front cover, and the outer side of the retaining ring abuts against the inner side of the dustproof seat.

4. A dustproof cylinder with a valve according to claim 2 or 3, characterized in that, A first sealing ring is provided between the retaining ring and the front cover.

5. A dustproof cylinder with a valve according to claim 3, characterized in that, The end face of the dust cover abuts against the end face of the front cover, and the inner side of the first sealing ring and the retaining ring are in contact.

6. A dustproof cylinder with a valve according to claim 1 or 2, characterized in that, The front cover has a groove on its outer side, and a second sealing ring is installed in the groove. The second sealing ring is located between the front cover and the mounting cavity.

7. A dustproof cylinder with a valve according to claim 1, characterized in that, The piston has a mounting groove at one end, and an anti-collision ring is installed in the mounting groove. The anti-collision ring is located between the piston and the inner end wall of the mounting cavity.

8. A dustproof cylinder with a valve according to claim 7, characterized in that, The piston has a first groove on its outer side wall, and a wear-resistant ring is provided in the first groove. The wear-resistant ring is located between the piston and the inner side wall of the mounting cavity.

9. A dustproof cylinder with a valve according to claim 8, characterized in that, The piston has a second groove on one side of the wear ring, and a piston sealing ring is provided in the second groove. The piston sealing ring is located between the piston and the mounting cavity.

10. A dustproof cylinder with a valve according to claim 8, characterized in that, The cylinder body is made of metal, and the solenoid valve is located on the cylinder body.

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