Air cylinder with self-lubricating function

Abstract

The invention relates to the field of air cylinders, and discloses an air cylinder with a self-lubricating function, which comprises an air cylinder barrel, a piston rod is arranged in the air cylinder barrel, the piston rod penetrates through one end of the air cylinder barrel, the piston rod is in sliding connection with the air cylinder barrel, and a sealing assembly is arranged at the upper end of the air cylinder barrel and located on the periphery of the piston rod. The air cylinder with the self-lubricating function comprises an air cylinder barrel and a piston rod, a sealing assembly is arranged on the air cylinder barrel and used for sealing the joint of the piston rod and the air cylinder barrel, and a cleaning assembly is arranged above the sealing assembly and used for scraping impurities on the surface of the piston rod. The surfaces of the sealing ring and the piston rod are continuously lubricated through the sealing ring and the elastic rope; friction force between the piston rod and an original sealing piece is reduced, on one hand, sealing performance is enhanced, and leakage is effectively prevented; on the other hand, sealing piece abrasion is reduced, maintenance frequency is reduced, the service life of the device is prolonged, and stable operation of equipment is powerfully guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of cylinders, in particular to a cylinder with a self-lubricating function. Background Art

[0002] In the patent application with application announcement number CN210829963U, it includes a door pump cylinder body, and a protruding block integrally formed with the door pump cylinder body is provided on the top of the door pump cylinder body, a countersunk hole is provided in the protruding block, and three lubricating oil injection channels are provided at the bottom of the countersunk hole, and the ends of the three lubricating oil injection channels are respectively connected to the piston chamber in the door pump cylinder body, and a one-way valve is respectively arranged in the three lubricating oil injection channels, a connecting pipe is threadedly connected at the countersunk hole, and a fixed disk part integrally formed with the connecting pipe is provided in the middle part of the connecting pipe, and the fixed disk part is connected to the protruding block by a plurality of locking bolts, and a lubricating oil storage cylinder is threadedly connected to the top of the connecting pipe, and a valve is provided on the lubricating oil storage cylinder, and a cover plate is threadedly connected to the top opening of the lubricating oil storage cylinder. The advantages are: the self-lubricating automobile door pump cylinder has the ability of self-lubrication, and can easily add lubricating oil to the annular wall in the piston cavity. When adding lubricating oil, the cover plate on the top of the lubricating oil storage cylinder can be spirally opened to add lubricating oil therein. When the valve is opened, the lubricating oil can enter the countersunk hole through the connecting pipe, and then enter the three lubricating oil injection flow channels, and then flow into the piston cavity through the one-way valve therein, thereby achieving self-lubrication; and because the connecting pipe and the lubricating oil storage cylinder can both be disassembled, they can be easily cleaned.

[0003] In the prior art including the above-mentioned patents, adding an oil supply device to the side of the cylinder will increase the required workpieces of the device, and in normal use, the grease in the cylinder only needs to be applied once after maintenance, and there is no need for frequent refilling. However, during daily use and maintenance of the cylinder, the seals near the piston rod are difficult to maintain and the maintenance frequency is low, which is not conducive to extending the life of the device or preventing air leakage during operation. It is worth mentioning that the existing cylinders cannot cope with harsh environments well. When the cylinder works in a place with a lot of dust and sand, the fine particles will not only accelerate the wear of the piston rod seal, but some particles will also enter the cylinder through the piston rod and combine with the grease to form sludge, which will eventually affect the normal operation of the cylinder. Summary of the invention

[0004] The problem to be solved by the present invention is that when the piston rod moves, it will undergo high-frequency friction with the piston rod seal, which is neither convenient for ensuring the stability of the cylinder operation nor for extending the life of the related sealing components. In addition, when the piston rod moves, it will bring in fine particles such as dust and mud, which will cause damage to the cylinder and the smoothness of the operation.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a cylinder with self-lubricating function, including a cylinder barrel, a piston rod is arranged inside the cylinder barrel, the piston rod passes through one end of the cylinder barrel, the piston rod is slidably connected to the cylinder barrel, and a sealing assembly is arranged around the piston rod at the upper end of the cylinder barrel, the sealing assembly is used to seal the connection between the piston rod and the cylinder barrel, and a cleaning assembly is arranged above the sealing assembly, and the cleaning assembly is used to scrape out impurities on the surface of the piston rod.

[0006] Preferably, the sealing assembly comprises a mounting tube, the lower end of which is fixedly connected to the cylinder tube, a spring 1 is arranged in the middle of the mounting tube, and three springs 1 are evenly distributed around the center of the mounting tube.

[0007] Preferably, a top ring is fixedly provided at the upper end of the spring 1, the top ring is slidably connected to the mounting tube, the upper surface of the top ring is arranged as an inclined surface, and a sealing ring is arranged on the inner side of the top ring.

[0008] Preferably, the inner side of the sealing ring is slidably connected to the outer surface of the piston rod, and the outer side of the sealing ring is slidably connected to the inner wall of the mounting tube. A total of three sealing rings are provided, and the sealing rings are arranged up and down.

[0009] Preferably, the sealing ring is connected by an elastic rope, the upper end of the elastic rope is fixedly connected to the mounting tube, the lower end of the elastic rope is fixedly connected to the cylinder tube, and a through hole is opened inside the sealing ring, and the through hole passes through the lower end of the sealing ring to the inner side of the sealing ring.

[0010] Preferably, a cover plate is provided at the upper end of the mounting tube, the cover plate is composed of two semicircles, a protrusion is provided at the lower end of the cover plate, and the cover plate is fixed to the mounting tube by screws.

[0011] Preferably, the cleaning assembly includes an upper mounting ring, the inner wall of which is slidably connected to the piston rod, and an annular scraper strip is fixedly provided in the middle of the upper end of the mounting ring, and the annular scraper strip is used to scrape off dust, mud, etc. on the outer surface of the piston rod.

[0012] Preferably, a middle mounting ring is provided at the lower end of the upper mounting ring, a second spring is provided inside the middle mounting ring, one end of the second spring away from the piston rod is fixedly connected to the middle mounting ring, and a push plate is fixedly provided at the other end of the second spring.

[0013] Preferably, the springs 2 are grouped in pairs, each group of springs 2 is fixedly connected to the push plate, and a total of eight groups of springs 2 are provided. The push plate is slidably connected to the middle mounting ring, and the inner wall of the middle mounting ring does not contact the piston rod.

[0014] Preferably, a lower mounting ring is arranged below the middle mounting ring, the inner diameter of the lower mounting ring is consistent with the inner diameter of the middle mounting ring, and a second annular scraper strip is arranged below the lower mounting ring, the inner wall of the second annular scraper strip is slidably connected to the piston rod.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) Through the setting of the sealing component, it not only enhances the overall sealing performance, but also realizes the continuous lubrication of the sealing ring and the piston rod surface with the help of components such as the sealing ring and the elastic rope; this ingenious design effectively reduces the friction between the piston rod and the original sealing component; after the friction is reduced; on the one hand, the sealing performance is further enhanced under the action of the lubricating oil and the sealing ring, effectively preventing the occurrence of leakage and other problems; on the other hand, the wear degree of the sealing component is significantly reduced; this not only reduces the frequency of maintenance work, but also extends the service life of the entire device, providing a strong guarantee for the stable operation of the equipment; (2) Through the setting of the cleaning component, the dust and sand attached to the surface of the piston rod can be adhered by the synergistic effect of the annular scraper strip 1 and the grease; the annular scraper strip 1 can initially scrape off some impurities; when the grease mixed with impurities reaches a specific position with the movement of the piston rod, the annular scraper strip 2 can discharge the mixture of these impurities and grease; in this way, the impurities are effectively prevented from continuing to move downward, thereby preventing excessive wear on the seal; at the same time, it also successfully prevents impurities from entering the cylinder barrel; on the one hand, this design greatly extends the service life of the seal, reduces the number of times the seal needs to be replaced due to frequent wear, thereby reducing the maintenance frequency and saving maintenance costs and time; on the other hand, it prevents dust from remaining in the cylinder barrel and prevents it from mixing with the grease in the cylinder barrel to form sludge, thereby ensuring the stability of the device operation and ensuring that the equipment can operate continuously and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of a partial enlarged structure of the bottom of the piston rod of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the sealing assembly of the present invention; Figure 4 It is a schematic diagram of a partial cross-sectional structure of the installation tube of the present invention; Figure 5 It is a partial cross-sectional view of the installation cylinder and a schematic diagram of the sealing ring structure of the present invention; Figure 6 This is a schematic diagram of the sealing ring structure of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the sealing ring of the present invention; Figure 8For the present invention Figure 7 The enlarged structural diagram at A in the middle; Fig. 9 It is a top view schematic diagram of the cover plate of the present invention; Fig.10 This is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention; Fig.11 It is a partial cross-sectional structural schematic diagram of the upper mounting ring and the middle mounting ring of the present invention; Fig.12 An exploded view of the cleaning assembly of the present invention; Fig.13 For the present invention Fig.12 Enlarged structural diagram at B in the middle.

[0017] In the figure: 1. cylinder barrel; 2. piston rod; 3. sealing assembly; 301. mounting barrel; 302. spring 1; 303. top ring; 304. sealing ring; 305. elastic rope; 306. through hole; 307. cover plate; 4. cleaning assembly; 401. upper mounting ring; 402. annular scraper strip 1; 403. middle mounting ring; 404. spring 2; 405. push plate; 406. lower mounting ring; 407. annular scraper strip 2. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 13As shown, a cylinder with a self-lubricating function provided by the present invention includes a cylinder barrel 1, a piston rod 2 is arranged inside the cylinder barrel 1, the piston rod 2 passes through one end of the cylinder barrel 1, the piston rod 2 is slidably connected to the cylinder barrel 1, and a sealing component 3 is arranged around the upper end of the cylinder barrel 1 and the piston rod 2. The sealing component 3 is used to seal the connection between the piston rod 2 and the cylinder barrel 1, and a cleaning component 4 is arranged above the sealing component 3, and the cleaning component 4 is used to scrape out impurities on the surface of the piston rod 2.

[0021] The sealing assembly 3 includes a mounting tube 301 , the lower end of which is fixedly connected to the cylinder tube 1 , a spring 1 302 is arranged in the middle of the mounting tube 301 , and three springs 1 302 are evenly distributed around the center of the mounting tube 301 .

[0022] A top ring 303 is fixedly provided at the upper end of the spring 1 302 . The top ring 303 is slidably connected to the mounting tube 301 . The upper surface of the top ring 303 is an inclined surface. A sealing ring 304 is provided on the inner side of the top ring 303 .

[0023] The inner side of the sealing ring 304 is slidably connected to the outer surface of the piston rod 2, and the outer side of the sealing ring 304 is slidably connected to the inner wall of the mounting tube 301. There are three sealing rings 304 in total, and the sealing rings 304 are arranged up and down.

[0024] The sealing ring 304 is connected by an elastic rope 305, the upper end of the elastic rope 305 is fixedly connected to the mounting tube 301, and the lower end of the elastic rope 305 is fixedly connected to the cylinder tube 1. A through hole 306 is opened inside the sealing ring 304, and the through hole 306 passes through the lower end of the sealing ring 304 to the inner side of the sealing ring 304.

[0025] A cover plate 307 is disposed at the upper end of the installation tube 301 . The cover plate 307 is composed of two semicircles. A convex block is disposed at the lower end of the cover plate 307 . The cover plate 307 is fixed to the installation tube 301 by screws.

[0026] The cleaning assembly 4 includes an upper mounting ring 401, the inner wall of which is slidably connected to the piston rod 2, and an annular scraper strip 402 is fixedly arranged in the middle of the upper end of the mounting ring 401, and the annular scraper strip 402 is used to scrape off dust and sand on the outer surface of the piston rod 2.

[0027] A middle mounting ring 403 is provided at the lower end of the upper mounting ring 401, and a second spring 404 is provided inside the middle mounting ring 403. One end of the second spring 404 away from the piston rod 2 is fixedly connected to the middle mounting ring 403, and a push plate 405 is fixedly provided at the other end of the second spring 404.

[0028] The springs 404 are grouped in pairs, and each group of springs 404 is fixedly connected to the push plate 405 . There are eight groups of springs 404 in total. The push plate 405 is slidably connected to the middle mounting ring 403 , and the inner wall of the middle mounting ring 403 does not contact the piston rod 2 .

[0029] A lower mounting ring 406 is provided below the middle mounting ring 403 , and the inner diameter of the lower mounting ring 406 is consistent with the inner diameter of the middle mounting ring 403 . A second annular scraper strip 407 is provided below the lower mounting ring 406 , and the inner wall of the second annular scraper strip 407 is slidably connected to the piston rod 2 .

[0030] The working principle and use process of the present invention are as follows: the installation cylinder 301 is filled with lubricating oil, and the top ring 303 will be pushed up under the elastic force of the spring 302; at this time, the top ring 303 can push the lubricating oil to the position of the sealing ring 304; when the piston rod 2 that has not been lubricated moves, it will drive the sealing ring 304 to move along the movement direction of the piston rod 2 by friction; in this process, the space around the uppermost sealing ring 304 increases, so a large amount of lubricating oil can flow into the lubricating oil, and then the surface of the piston rod 2 begins to be lubricated; as the piston rod 2 moves, part of the lubricating oil will move with it, further enhancing the lubricating effect on the surface of the piston rod 2; when the piston rod 2 moves downward, part of the lubricating oil will flow downward step by step along the sealing ring 304, and at the same time, the sealing The ring 304 will also move downward, so that each sealing ring 304 below can be lubricated; when the sealing ring 304 is lubricated, it will move upward under the action of the elastic rope 305; it should be noted that in the process of lubricating the sealing ring 304, each sealing ring 304 will scrape off a portion of the lubricating oil and leave it in the cavity between the sealing rings 304 for temporary storage; when the piston rod 2 has not been used for a long time and its surface lacks lubrication, moving the piston rod 2 again can drive the sealing ring 304 to move; when the sealing ring 304 is driven downward, on the one hand, the original lubrication process will be repeated, and on the other hand, the lubricating oil temporarily stored in the cavity of the sealing ring 304 will be squeezed by the sealing ring 304 to more optimally lubricate the surface of the piston rod 2 through the through hole 306; The push plate 405 in the middle mounting ring 403 is filled with grease; under the elastic force of the second spring 404, the push plate 405 pushes the grease toward the piston rod 2, so that the grease is evenly coated on the entire surface of the piston rod 2; when the piston rod 2 moves upward, the grease remaining on its surface plays an adhesive role, sticking and mixing fine particles such as dust and sand on the outside of the piston rod 2; and when the piston rod 2 moves downward, the second annular scraper 407 will scrape off a part of the mixture formed by the grease and impurities; when these mixtures enter the area of ​​the middle mounting ring 403 again, those mixtures that have not been completely scraped off will combine with the new grease; because the grease is fluid, it can dilute the more stubborn mixture, or loosen it, reducing its adhesion; when the mixture enters the range of the lower mounting ring 406, under the further action of the second annular scraper 407, the mixture will be completely scraped off and discharged along the gap between the second annular scraper 407 and the lower mounting ring 406.

[0031] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A cylinder with self-lubricating function, comprising a cylinder barrel (1), characterized in that: A piston rod (2) is arranged inside the cylinder barrel (1), the piston rod (2) passes through one end of the cylinder barrel (1), the piston rod (2) is slidably connected to the cylinder barrel (1), a sealing component (3) is arranged around the piston rod (2) at the upper end of the cylinder barrel (1), the sealing component (3) is used to seal the connection between the piston rod (2) and the cylinder barrel (1), and a cleaning component (4) is arranged above the sealing component (3), the cleaning component (4) is used to scrape out impurities on the surface of the piston rod (2).

2. The cylinder with self-lubricating function according to claim 1, characterized in that: The sealing assembly (3) comprises a mounting tube (301), the lower end of the mounting tube (301) being fixedly connected to the cylinder tube (1), a spring 1 (302) being arranged in the middle of the mounting tube (301), and three springs 1 (302) being evenly distributed around the center of the mounting tube (301).

3. The cylinder with self-lubricating function according to claim 2, characterized in that: A top ring (303) is fixedly provided at the upper end of the spring 1 (302), the top ring (303) is slidably connected to the mounting tube (301), the upper surface of the top ring (303) is arranged as an inclined surface, and a sealing ring (304) is arranged on the inner side of the top ring (303).

4. The cylinder with self-lubricating function according to claim 3, characterized in that: The inner side of the sealing ring (304) is slidably connected to the outer surface of the piston rod (2), and the outer side of the sealing ring (304) is slidably connected to the inner wall of the mounting cylinder (301). A total of three sealing rings (304) are provided, and the sealing rings (304) are arranged up and down.

5. The cylinder with self-lubricating function according to claim 4, characterized in that: The sealing ring (304) is connected by an elastic rope (305), the upper end of the elastic rope (305) is fixedly connected to the mounting tube (301), and the lower end of the elastic rope (305) is fixedly connected to the cylinder tube (1). A through hole (306) is provided inside the sealing ring (304), and the through hole (306) penetrates from the lower end of the sealing ring (304) to the inner side of the sealing ring (304).

6. The cylinder with self-lubricating function according to claim 5, characterized in that: A cover plate (307) is provided at the upper end of the installation tube (301), the cover plate (307) is composed of two semicircles, a convex block is provided at the lower end of the cover plate (307), and the cover plate (307) is fixed to the installation tube (301) by means of screws.

7. The cylinder with self-lubricating function according to claim 1, characterized in that: The cleaning assembly (4) comprises an upper mounting ring (401), the inner wall of the upper mounting ring (401) being slidably connected to the piston rod (2), and an annular scraper strip (402) being fixedly arranged at the middle of the upper end of the mounting ring (401), the annular scraper strip (402) being used to scrape away dust, sand, etc. on the outer surface of the piston rod (2).

8. The cylinder with self-lubricating function according to claim 7, characterized in that: A middle mounting ring (403) is arranged at the lower end of the upper mounting ring (401), a second spring (404) is arranged inside the middle mounting ring (403), one end of the second spring (404) away from the piston rod (2) is fixedly connected to the middle mounting ring (403), and a push plate (405) is fixedly arranged at the other end of the second spring (404).

9. The cylinder with self-lubricating function according to claim 8, characterized in that: The springs (404) are grouped in pairs. Each group of springs (404) is fixedly connected to a push plate (405). A total of eight groups of springs (404) are provided. The push plate (405) is slidably connected to a middle mounting ring (403). The inner wall of the middle mounting ring (403) does not contact the piston rod (2).

10. The cylinder with self-lubricating function according to claim 9, characterized in that: A lower mounting ring (406) is arranged below the middle mounting ring (403), the inner diameter of the lower mounting ring (406) being consistent with the inner diameter of the middle mounting ring (403), and a second annular scraper strip (407) is arranged below the lower mounting ring (406), the inner wall of the second annular scraper strip (407) being slidably connected to the piston rod (2).

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