Cylinder with self-lubricating function

Abstract

The application relates to the field of air cylinders, and discloses an air cylinder with a self-lubricating function, which comprises a cylinder barrel, the inside of the cylinder barrel is provided with a piston rod, the piston rod penetrates one end of the cylinder barrel, the piston rod is in sliding connection with the cylinder barrel, a sealing assembly is arranged around the upper end of the cylinder barrel and the piston rod, the sealing assembly is used for sealing the connecting position of the piston rod and the cylinder barrel, a cleaning assembly is arranged above the sealing assembly, and the cleaning assembly is used for scraping off impurities on the surface of the piston rod. The air cylinder with the self-lubricating function has the sealing assembly, the sealing ring and the elastic rope are used to continuously lubricate the sealing ring and the surface of the piston rod; the friction between the piston rod and the original sealing piece is reduced, the sealing property is strengthened on one hand, and the leakage is effectively prevented; on the other hand, the sealing piece is reduced in abrasion, the maintenance frequency is reduced, the service life of the device is prolonged, and the stable operation of the equipment is effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air cylinders, in particular to an air cylinder with self-lubricating function. BACKGROUND

[0002] In the patent application with the application publication number CN210829963U, it includes a door pump air cylinder body, the upper part of the door pump air cylinder body has a protruding block integrally formed with the door pump air cylinder body, a counterbore is formed in the protruding block, three lubricating oil injection flow channels are formed in the bottom of the counterbore, the ends of the three lubricating oil injection flow channels are respectively in communication with the piston cavity in the door pump air cylinder body, a one-way valve is arranged in each of the three lubricating oil injection flow channels, a connecting pipe is threadedly connected to the counterbore, the middle part of the connecting pipe has a fixed disc part integrally formed with the connecting pipe, the fixed disc part is connected to the protruding block through a plurality of locking bolts, a lubricating oil storage cylinder is threadedly connected to the upper part of the connecting pipe, a valve is arranged 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 that the self-lubricating automobile door pump air cylinder has the ability of self-lubrication, can conveniently add lubricating oil to the ring wall of the piston cavity, the cover plate at the top of the lubricating oil storage cylinder can be screwed open when adding lubricating oil, lubricating oil can be added thereto, when the valve is opened, lubricating oil can enter the counterbore 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 valves, thereby realizing self-lubrication; and since the connecting pipe and the lubricating oil storage cylinder can be detached, they can be conveniently cleaned.

[0003] In the prior art including the above-mentioned patent, an oil supply device is added to the side of the cylinder barrel, which increases the required workpieces of the device, and in normal use, the lubricating grease in the cylinder barrel only needs to be applied once after maintenance, without the need for frequent addition, but the seal near the piston rod is difficult to maintain and has a low maintenance frequency during daily use and maintenance of the air cylinder, which is not conducive to prolonging the service life of the device and preventing air leakage during work; it is worth mentioning that the existing air cylinder cannot also well cope with harsh environments, when the air cylinder works in a place with a lot of dust and sand, fine particles not only accelerate the wear of the piston rod seal, but also some particles enter the cylinder barrel through the piston rod and combine with the lubricating grease to form sludge, which ultimately affects the normal work of the air cylinder. SUMMARY

[0004] The problem to be solved by the present application is that the piston rod will have high-frequency friction with the piston rod seal when moving, which is not conducive to ensuring the stability of the air cylinder operation, not conducive to prolonging the service life of the related sealing components, and the movement of the piston rod will bring in fine particles such as dust and sand to cause harm to the cylinder barrel and work smoothness.

[0005] To solve the above technical problems, the technical scheme of the present application is: a cylinder with self-lubricating function, comprising 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 in sliding connection with the cylinder barrel, a sealing assembly is arranged around the upper end of the cylinder barrel, the sealing assembly is used for sealing the connection between the piston rod and the cylinder barrel, a cleaning assembly is arranged above the sealing assembly, the cleaning assembly is used for scraping off impurities on the surface of the piston rod,

[0006] The sealing assembly mainly comprises a spring one, a top ring, a sealing ring, an elastic rope and a through hole, the upper end of the spring one is fixedly provided with the top ring, the top ring is in sliding connection with the mounting barrel, the upper surface of the top ring is provided in an inclined surface, the inner side of the top ring is provided with the sealing ring, the inner side of the sealing ring is in sliding connection with the outer surface of the piston rod, the outer side of the sealing ring is in sliding connection with the inner wall of the mounting barrel, the sealing ring is provided with three in total, the sealing rings are arranged in an up-down arrangement, the sealing rings are connected by the elastic rope, the upper end of the elastic rope is fixedly connected with the mounting barrel, the lower end of the elastic rope is fixedly connected with the cylinder barrel, the inside of the sealing ring is provided with the through hole, the through hole penetrates from the lower end of the sealing ring to the inner side of the sealing ring;

[0007] The cleaning assembly comprises an upper mounting ring, the inner wall of the upper mounting ring is in sliding connection with the piston rod, the upper end of the mounting ring is fixedly provided with an annular scraper one in the middle, the annular scraper one is used for scraping off dust and sand on the outer surface of the piston rod, the lower end of the upper mounting ring is provided with a middle mounting ring, the inside of the middle mounting ring is provided with a spring two, the end of the spring two away from the piston rod is fixedly connected with the middle mounting ring, the other end of the spring two is fixedly provided with a push plate.

[0008] As a preferred, the sealing assembly comprises a mounting barrel, the lower end of the mounting barrel is fixedly connected with the cylinder barrel, the middle of the mounting barrel is provided with the spring one, the spring one is uniformly distributed around the center of the mounting barrel.

[0009] As a preferred, the upper end of the mounting barrel is provided with a cover plate, the cover plate is composed of two semicircles, the lower end of the cover plate is provided with a protruding block, the cover plate is fixed on the mounting barrel by screws.

[0010] As a preferred, the spring two is in a group of two, each group of the spring two is fixedly connected with the push plate, the spring two is provided with eight groups in total, the push plate is in sliding connection with the middle mounting ring, the inner wall of the middle mounting ring does not contact the piston rod.

[0011] As a preferred, the lower end of the middle mounting ring is provided with a lower mounting ring, the inner diameter of the lower mounting ring is consistent with the inner diameter of the middle mounting ring, the lower end of the lower mounting ring is provided with an annular scraper two, the inner wall of the annular scraper two is in sliding connection with the piston rod.

[0012] Compared with the prior art, the technical scheme of the present application has the following advantages:

[0013] (1) By setting the sealing assembly, it not only enhances the overall sealing, but also realizes the continuous lubrication of the sealing ring and the surface of the piston rod with the help of the sealing ring and the elastic rope and other components. This ingenious design effectively reduces the friction between the piston rod and the original sealing element. After the friction is reduced, on the one hand, the sealing is further strengthened under the action of lubricating oil and the sealing ring, effectively preventing leakage and other problems; on the other hand, the degree of wear of the sealing element is significantly reduced; this not only reduces the frequency of maintenance work, but also prolongs the service life of the entire device, providing a strong guarantee for the stable operation of the equipment;

[0014] (2) By setting the cleaning assembly, through the synergistic effect of the annular scraper I and the lubricating grease, dust and sand attached to the surface of the piston rod can be adhered; the annular scraper I can preliminarily scrape off part of the impurities; when the lubricating grease mixed with impurities reaches a certain position with the movement of the piston rod, the annular scraper II can discharge the mixture of impurities and lubricating grease; in this way, it effectively avoids the impurities from moving downward, thereby preventing excessive wear of the sealing element; at the same time, it also successfully prevents the impurities from entering the inside of the cylinder barrel; this design, on the one hand, greatly prolongs the service life of the sealing element, reduces the number of times the sealing element needs to be replaced due to frequent wear, thereby reducing the maintenance frequency and saving maintenance cost and time; on the other hand, it avoids the dust remaining in the cylinder barrel, preventing it from mixing with the lubricating grease in the cylinder barrel to form sludge, thereby ensuring the stability of the device operation and ensuring that the equipment can continue to operate efficiently. BRIEF DESCRIPTION OF DRAWINGS

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

[0016] Figure 2 is a schematic diagram of the local enlarged structure of the bottom of the piston rod of the present application;

[0017] Figure 3 is a schematic diagram of the three-dimensional structure of the sealing assembly of the present application;

[0018] Figure 4 is a schematic diagram of the local sectional structure of the installation cylinder of the present application;

[0019] Figure 5 is a schematic diagram of the local sectional structure of the installation cylinder and the structure of the sealing ring of the present application;

[0020] Figure 6 is a schematic diagram of the structure of the sealing ring of the present application;

[0021] Figure 7 is a schematic diagram of the sectional structure of the sealing ring of the present application;

[0022] Figure 8 For the invention Figure 7 Amplification structure schematic diagram in A of the invention;

[0023] Figure 9 For the invention cover plate top view schematic diagram;

[0024] Figure 10 For the invention cleaning assembly three-dimensional structure schematic diagram;

[0025] Figure 11 For the invention upper mounting ring and middle mounting ring partial cross-section structure schematic diagram;

[0026] Figure 12 For the invention cleaning assembly exploded view;

[0027] Figure 13 For the invention Figure 12 Amplification structure schematic diagram in B of the invention.

[0028] In the figure: 1, cylinder barrel; 2, piston rod; 3, sealing assembly; 301, mounting cylinder; 302, spring one; 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 one; 403, middle mounting ring; 404, spring two; 405, push plate; 406, lower mounting ring; 407, annular scraper two. DETAILED DESCRIPTION

[0029] So that the purposes, technical solutions and advantages of the embodiments of the present disclosure are clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the protection scope of the present disclosure.

[0030] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall be understood as the usual meanings understood by a person with ordinary skills in the art to which the present disclosure belongs. The similar words such as “include” or “contain” and the like used in the present disclosure mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. The similar words such as “connect” or “connected” are not limited to physical or mechanical connection, but also can include electrical connection, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship can also change accordingly.

[0031] As Figures 1 to 13 shown, the application provides a cylinder with self-lubricating function, which comprises a cylinder barrel 1, a piston rod 2 arranged inside the cylinder barrel 1, the piston rod 2 penetrating through one end of the cylinder barrel 1, the piston rod 2 being in sliding connection with the cylinder barrel 1, a sealing assembly 3 arranged around the upper end of the cylinder barrel 1 and surrounding the piston rod 2, the sealing assembly 3 being used for sealing the connection between the piston rod 2 and the cylinder barrel 1, and a cleaning assembly 4 arranged above the sealing assembly 3, the cleaning assembly 4 being used for scraping off impurities on the surface of the piston rod 2.

[0032] The sealing assembly 3 mainly comprises a spring 302, a top ring 303, a sealing ring 304, an elastic rope 305 and a through hole 306, the top ring 303 being fixedly arranged at the upper end of the spring 302 and being in sliding connection with the mounting cylinder 301, the upper surface of the top ring 303 being arranged in an inclined manner, the inner side of the top ring 303 being provided with the sealing ring 304, the inner side of the sealing ring 304 being in sliding connection with the outer surface of the piston rod 2, the outer side of the sealing ring 304 being in sliding connection with the inner wall of the mounting cylinder 301, the sealing ring 304 being arranged in three, the sealing ring 304 being arranged in an up-down manner, the sealing ring 304 being connected by the elastic rope 305, the upper end of the elastic rope 305 being fixedly connected with the mounting cylinder 301, the lower end of the elastic rope 305 being fixedly connected with the cylinder barrel 1, and the through hole 306 being arranged in the sealing ring 304 and penetrating through from the lower end to the inner side of the sealing ring 304.

[0033] The cleaning assembly 4 comprises an upper mounting ring 401, the inner wall of the upper mounting ring 401 being in sliding connection with the piston rod 2, the upper end of the mounting ring 401 being fixedly provided with an annular scraping strip 402 in the middle, the annular scraping strip 402 being used for scraping off dust and sand on the outer surface of the piston rod 2, the lower end of the upper mounting ring 401 being provided with a middle mounting ring 403, the middle mounting ring 403 being provided with a spring 404 in the inside, the end of the spring 404 away from the piston rod 2 being fixedly connected with the middle mounting ring 403, and the other end of the spring 404 being fixedly provided with a push plate 405.

[0034] The sealing assembly 3 comprises a mounting cylinder 301, the lower end of the mounting cylinder 301 being fixedly connected with the cylinder barrel 1, and the middle of the mounting cylinder 301 being provided with the spring 302, the spring 302 being evenly distributed around the center of the mounting cylinder 301.

[0035] The upper end of the mounting cylinder 301 is provided with a cover plate 307, the cover plate 307 being composed of two semicircles, the lower end of the cover plate 307 being provided with a protrusion, and the cover plate 307 being fixed on the mounting cylinder 301 by screws.

[0036] Spring two 404 is a group of two, each group of spring two 404 is fixedly connected with push plate 405, spring two 404 is provided with eight groups, push plate 405 is slidably connected with middle mounting ring 403, the inner wall of middle mounting ring 403 does not contact piston rod 2.

[0037] The lower portion of the middle mounting ring 403 is provided with a lower mounting ring 406, the inner diameter of the lower mounting ring 406 is consistent with the inner diameter of the middle mounting ring 403, and the lower portion of the lower mounting ring 406 is provided with an annular scraping strip two 407, the inner wall of the annular scraping strip two 407 is slidably connected with the piston rod 2.

[0038] The working principle and use process of the application: the inside of the installation cylinder 301 is filled with lubricating oil, under the elastic force of spring one 302, the top ring 303 is pushed up; at this time, the top ring 303 can push the lubricating oil to the position where the sealing ring 304 is located; 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 that a large amount of lubricating oil can flow into the lubricating oil, at this time, the surface of the piston rod 2 is lubricated; with the movement of the piston rod 2, part of the lubricating oil will move, further strengthening 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 along the sealing ring 304, at the same time, the sealing ring 304 will also move downward, in this way, each sealing ring 304 below can be lubricated; after the sealing ring 304 is lubricated, under the action of the elastic cord 305, it will move upward; it should be noted that in the process of lubricating the sealing ring 304, each sealing ring 304 will scrape off part of the lubricating oil and store it temporarily in the cavity between the sealing rings 304; when the piston rod 2 is not 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 is repeated, on the other hand, the lubricating oil temporarily stored in the cavity of the sealing ring 304 will be more optimally lubricated on the surface of the piston rod 2 through the through hole 306 under the mutual extrusion of the sealing rings 304.

[0039] The push plate 405 in the middle mounting ring 403 is filled with lubricating grease; under the elastic force of the spring 404, the push plate 405 pushes the lubricating grease towards the direction of the piston rod 2, so that the lubricating grease is evenly coated on the whole surface of the piston rod 2; when the piston rod 2 moves upwards, the lubricating grease remaining on the surface thereof plays the adhesion role to stick and mix the fine particles such as dust and sand outside the piston rod 2; when the piston rod 2 moves downwards, the annular scraper 407 scrapes off part of the mixture of the lubricating grease and impurities; when the mixture enters the area of the middle mounting ring 403 again, the mixture which has not been completely scraped off combines with the new lubricating grease; due to the flowability of the lubricating grease, the mixture which is more stubborn can be diluted or loosened, and the adhesion firmness thereof is reduced; when the mixture enters the range of the lower mounting ring 406, under the further action of the annular scraper 407, the mixture is completely scraped off and discharged along the gap between the annular scraper 407 and the lower mounting ring 406.

[0040] The above examples are only exemplary embodiments of the present application, and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and the modification or equivalent replacement is also regarded as falling within the protection scope of the present application.

Claims

1. A cylinder with self-lubricating function, comprising a cylinder barrel (1), characterized in that: The inside of the cylinder barrel (1) is provided with a piston rod (2), the piston rod (2) penetrates one end of the cylinder barrel (1), the piston rod (2) is in sliding connection with the cylinder barrel (1), the upper end of the cylinder barrel (1) is provided with a sealing assembly (3) around the piston rod (2), the sealing assembly (3) is used for sealing the connection between the piston rod (2) and the cylinder barrel (1), the upper side of the sealing assembly (3) is provided with a cleaning assembly (4), and the cleaning assembly (4) is used for scraping off impurities on the surface of the piston rod (2). The sealing assembly (3) mainly comprises a spring one (302), a top ring (303), a sealing ring (304), a elastic rope (305) and a through hole (306), the upper end of the spring one (302) is fixedly provided with the top ring (303), the top ring (303) is in sliding connection with the mounting barrel (301), the upper surface of the top ring (303) is provided as an inclined surface, the inner side of the top ring (303) is provided with the sealing ring (304), the inner side of the sealing ring (304) is in sliding connection with the outer surface of the piston rod (2), the outer side of the sealing ring (304) is in sliding connection with the inner wall of the mounting barrel (301), the sealing ring (304) is provided with three in total, the sealing ring (304) is arranged in an upper-lower mode, the sealing ring (304) is connected through the elastic rope (305), the upper end of the elastic rope (305) is fixedly connected with the mounting barrel (301), the lower end of the elastic rope (305) is fixedly connected with the cylinder barrel (1), and the inside of the sealing ring (304) is provided with the through hole (306), the through hole (306) penetrates from the lower end of the sealing ring (304) to the inner side of the sealing ring (304). The cleaning assembly (4) comprises an upper mounting ring (401), the inner wall of the upper mounting ring (401) is in sliding connection with the piston rod (2), the upper end of the mounting ring (401) is fixedly provided with an annular scraper one (402) in the middle, the annular scraper one (402) is used for scraping dust and sand on the outer surface of the piston rod (2), the lower end of the upper mounting ring (401) is provided with a middle mounting ring (403), the inside of the middle mounting ring (403) is provided with a spring two (404), one end of the spring two (404) away from the piston rod (2) is fixedly connected with the middle mounting ring (403), and the other end of the spring two (404) is fixedly provided with a push plate (405).

2. The cylinder with self-lubricating function according to claim 1, characterized in that: The sealing assembly (3) comprises a mounting barrel (301), the lower end of the mounting barrel (301) is fixedly connected with the cylinder barrel (1), and the middle of the mounting barrel (301) is provided with a spring one (302).

3. The cylinder with self-lubricating function according to claim 2, characterized in that: The upper end of the mounting barrel (301) is provided with a cover plate (307), the cover plate (307) is composed of two semicircles, the lower end of the cover plate (307) is provided with a protruding block, and the cover plate (307) is fixed on the mounting barrel (301) through screws.

4. The cylinder with self-lubricating function according to claim 1, characterized in that: Said spring two (404) is a group every two, each group of spring two (404) is fixedly connected with the push plate (405), said spring two (404) is provided with eight groups, the push plate (405) is slidably connected with the middle mounting ring (403), the inner wall of the middle mounting ring (403) is not in contact with the piston rod (2).

5. The cylinder with self-lubricating function according to claim 1, characterized in that: The lower portion of the middle mounting ring (403) is provided with a lower mounting ring (406), the inner diameter of the lower mounting ring (406) is consistent with the inner diameter of the middle mounting ring (403), the lower portion of the lower mounting ring (406) is provided with an annular scraper two (407), the inner wall of the annular scraper two (407) is slidably connected with the piston rod (2).

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