High-pressure hydraulic oil cylinder with combined sealing structure

Abstract

The invention relates to the technical field of hydraulic oil cylinders, in particular to a high-pressure hydraulic oil cylinder with a combined sealing structure, which is characterized in that a traction groove is formed in the inner side face of an oil cylinder body, a sealing groove is formed in the surface of the traction groove, a fixing groove is formed in the end face of the oil cylinder body, a traction rod is arranged on the surface of a threaded pipe, and a mounting groove is formed in the surface of the traction rod; the end face of the threaded pipe is provided with a positioning pipe, and the surface of the positioning pipe is provided with a fixing nut. The oil cylinder has the beneficial effects that firstly, the threaded pipe is in threaded connection with the interior of the oil cylinder body, then the connection sealing performance of the threaded pipe and the oil cylinder body is improved through cooperation of the sealing strip and the sealing groove, and then the first arc-shaped plate and the second arc-shaped plate are spliced and fixed through the mounting nut; and then the first arc-shaped plate and the second arc-shaped plate which are spliced can be screwed in the threaded groove, so that the surface of the piston rod can be conveniently contacted through the scraping plates arranged on the end surfaces of the first arc-shaped plate and the second arc-shaped plate, and finally particulate matters on the surface of the piston rod can be conveniently cleaned by utilizing the scraping plates.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic oil cylinders, in particular to a high-pressure hydraulic oil cylinder with a combined sealing structure. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, producing linear reciprocating (or oscillating) motion. It features a simple structure and reliable operation. Reciprocating motion can be achieved without a reduction gear, and with zero transmission backlash, the cylinder offers smooth motion. Therefore, it is widely used in hydraulic systems of various machines. The output force of a hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure differential across it. A hydraulic cylinder essentially consists of a cylinder barrel and head, a piston and piston rod, and a sealing device.

[0003] In actual working conditions, due to the influence of external environmental factors, a certain amount of impurities and dust will inevitably be adsorbed on the surface of the hydraulic rod. When the hydraulic rod reciprocates through the cylinder body, these particulate matter will easily deposit on the surface of the seal, resulting in increased movement resistance of the hydraulic rod and significant local wear, which in turn affects the sealing effect and movement smoothness of the cylinder.

[0004] To this end, the present invention proposes a high-pressure hydraulic cylinder with a combined sealing structure to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a high-pressure hydraulic cylinder with a combined sealing structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-pressure hydraulic cylinder with a combined sealing structure, comprising: a cylinder body, a piston rod disposed within the cylinder body, a first mounting seat disposed at one end of the cylinder body, a second mounting seat disposed at one end of the piston rod, a traction groove disposed on an inner side surface of the cylinder body, a sealing groove disposed on a surface of the traction groove, and a fixing groove disposed on an end surface of the cylinder body; Threaded pipe, a traction rod is provided on the surface of the threaded pipe, a mounting groove is provided on the surface of the traction rod, a sealing strip is provided in the mounting groove, a positioning pipe is provided on the end face of the threaded pipe, a fixing nut is provided on the surface of the positioning pipe, and a sealing pipe is provided on the inner side of the fixing nut; A first curved plate, wherein a positioning slot is provided on a side surface of the first curved plate; The second arc-shaped plate has a positioning clamping plate on its side surface, and both the first arc-shaped plate and the second arc-shaped plate have scrapers on their end surfaces.

[0007] Preferably, a sealing gasket is provided in the fixed groove, and the sealing gasket is an annular plate structure. A thread is provided on the inner side of the cylinder body, and the threaded tube is screwed into the cylinder body. The traction rod and the traction groove are spiral-shaped as a whole. The traction rod is inserted into the traction groove, and the traction rod is fixedly connected to the surface of the threaded tube.

[0008] Preferably, the sealing strip is fixedly connected in the installation groove, the sealing strip is inserted into the sealing groove, a thread is provided on the surface of the positioning tube, the fixing nut is screwed onto the positioning tube, a limiting spring is provided on the side of the fixing nut, one end of the limiting spring is fixedly connected to the side of the fixing nut, and a positioning plate is provided at the other end of the limiting spring, and the positioning plate is an annular plate structure.

[0009] Preferably, a sealing plate is provided on the surface of the positioning plate, and the sealing plate is an annular plate structure. The sealing plate is inserted into the fixing groove, and the sealing tube is fixedly connected to the side of the fixing nut.

[0010] Preferably, the end face of the sealing tube is provided with a limiting fixing groove, a rubber plate is arranged in the limiting fixing groove, the rubber plate is an annular plate structure, and the end face of the positioning tube is provided with a mounting thread groove.

[0011] Preferably, a sealing ring is provided on the inner annular surface of the positioning tube, threads are provided on the surfaces of the first arc plate and the second arc plate, and the first arc plate and the second arc plate are screwed into the mounting thread groove after being spliced ​​together.

[0012] Preferably, a mounting nut is screwed onto the surface of the first arc plate and the second arc plate after being spliced ​​together, and the positioning card plate is a square plate-shaped structure as a whole, and the positioning card plate is inserted into the positioning card slot.

[0013] Preferably, two groups of scrapers are provided, and the two groups of scrapers are fixedly connected to the end faces of the first curved plate and the second curved plate respectively. The first curved plate and the second curved plate are spliced ​​to form a ring structure, and the inner side of the scraper contacts the surface of the piston rod.

[0014] Preferably, the first arc plate and the second arc plate are integrally formed into an arc plate-like structure, and the inner ring surface of the sealing ring contacts the surface of the piston rod.

[0015] Preferably, the positioning tube is fixedly connected to the end face of the threaded tube, the positioning slot is a square plate structure, and there are two groups of positioning slots, which are symmetrically distributed up and down about the inner surface of the first arc plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a high-pressure hydraulic cylinder with a combined sealing structure. When in use, the threaded tube is first screwed into the inside of the cylinder body, and then the sealing strip and the sealing groove are coordinated to increase the sealing performance of the connection between the threaded tube and the cylinder body. Then, the first curved plate and the second curved plate are spliced ​​and fixed by installing nuts. Then, the spliced ​​first curved plate and the second curved plate can be screwed into the threaded groove, so that the scrapers arranged on the end faces of the first curved plate and the second curved plate can conveniently contact the surface of the piston rod. Finally, the scrapers can be used to conveniently clean the particles on the surface of the piston rod to ensure the sealing effect between the piston rod and the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a partial cross-sectional view of the device of the present invention; Figure 3 for Figure 2 A in the middle is an enlarged structural diagram; Figure 4 This is a schematic diagram of the structure of the threaded pipe of the present invention; Figure 5 This is a schematic diagram of the structure of the threaded pipe of the present invention when it is tilted; Figure 6 This is a partial cross-sectional view of the oil cylinder body of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a cross-sectional view of the device of the present invention; Figure 9 for Figure 8 The enlarged structural diagram at C in the middle; Figure 10 Schematic diagram of the structure of the first curved plate and the second curved plate of the present invention.

[0018] In the figure: 1. Cylinder body; 2. Piston rod; 3. First mounting seat; 4. Second mounting seat; 5. Drawing groove; 6. Sealing groove; 7. Fixing groove; 8. Threaded pipe; 9. Drawing rod; 10. Mounting groove; 11. Sealing strip; 12. Fixing nut; 13. Sealing pipe; 14. First arc plate; 15. Positioning card groove; 16. Second arc plate; 17. Positioning card plate; 18. Scraper; 19. Sealing gasket; 20. Positioning pipe; 21. Limiting spring; 22. Positioning plate; 23. Sealing plate; 24. Limiting fixing groove; 25. Rubber plate; 26. Mounting threaded groove; 27. Mounting nut; 28. Sealing ring. DETAILED DESCRIPTION

[0019] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figures 1 to 10The present invention provides a technical solution: a high-pressure hydraulic cylinder with a combined sealing structure, comprising: a cylinder body 1, a piston rod 2 is arranged in the cylinder body 1, a first mounting seat 3 is arranged at one end of the cylinder body 1, a second mounting seat 4 is arranged at one end of the piston rod 2, a traction groove 5 is opened on the inner side surface of the cylinder body 1, a sealing groove 6 is opened on the surface of the traction groove 5, and a fixing groove 7 is opened on the end surface of the cylinder body 1; a threaded tube 8, a traction rod 9 is arranged on the surface of the threaded tube 8, a mounting groove 10 is opened on the surface of the traction rod 9, a sealing strip 11 is arranged in the mounting groove 10, a positioning tube 20 is arranged on the end surface of the threaded tube 8, a fixing nut 12 is arranged on the surface of the positioning tube 20, and a sealing tube 13 is arranged on the inner side surface of the fixing nut 12; a first curved plate 14, a positioning groove 15 is opened on the side surface of the first curved plate 14; a second curved plate 16, a positioning card plate 17 is arranged on the side surface of the second curved plate 16, and scrapers 18 are provided on the end surfaces of the first curved plate 14 and the second curved plate 16; First, screw the threaded tube 8 into the inside of the cylinder body 1, and then cooperate with the sealing strip 11 and the sealing groove 6 to increase the sealing performance of the connection between the threaded tube 8 and the cylinder body 1. Then, splice the first curved plate 14 and the second curved plate 16 and fix them by installing the nut 27. Then, the spliced ​​first curved plate 14 and the second curved plate 16 can be screwed into the installing threaded groove 26, so that the scraper 18 provided on the end faces of the first curved plate 14 and the second curved plate 16 can be easily contacted with the surface of the piston rod 2. Finally, the scraper 18 can be used to conveniently clean the particles on the surface of the piston rod 2, thereby ensuring the sealing effect of the piston rod 2 and the cylinder body 1.

[0021] Embodiment 2: On the basis of embodiment 1, in order to facilitate the removal of foreign particles on the surface of the piston rod 2, a scraper 18 is provided, a sealing plate 23 is provided on the surface of the positioning plate 22, and the sealing plate 23 is an annular plate structure. The sealing plate 23 is inserted into the fixing groove 7, and the sealing tube 13 is fixedly connected to the side of the fixing nut 12. A limited fixing groove 24 is provided on the end face of the sealing tube 13, and a rubber plate 25 is provided in the limited fixing groove 24. The rubber plate 25 is an annular plate structure, and an installation thread groove 26 is provided on the end face of the positioning tube 20. A sealing ring 28 is provided on the inner annular surface of the positioning tube 20. The surfaces of the first curved plate 14 and the second curved plate 16 are both provided with threads. The first curved plate 14 and the second curved plate 16 are screwed into the installation thread groove 26 after being spliced ​​together; When in use, the first curved plate 14 and the second curved plate 16 are first spliced ​​together, and then the spliced ​​first curved plate 14 and the second curved plate 16 can be conveniently screwed into the mounting thread groove 26, so that the first curved plate 14 and the second curved plate 16 can be fixed. Then, when the piston rod 2 is displaced, the scraper 18 can be used to contact the surface of the piston rod 2 to facilitate the cleaning of larger particles of impurities attached to the surface of the piston rod 2, thereby avoiding wear between larger particles of impurities and the inside of the cylinder body 1 and affecting the sealing effect. The setting of the sealing ring 28 can increase the sealing performance of the positioning tube 20 and the piston rod 2.

[0022] In order to facilitate the removal of the first curved plate 14 and the second curved plate 16, a positioning card plate 17 is provided. After the first curved plate 14 and the second curved plate 16 are spliced, a mounting nut 27 is screwed on the surface. The positioning card plate 17 is a square plate-shaped structure as a whole. The positioning card plate 17 is inserted into the positioning card groove 15. Two groups of scrapers 18 are provided. The two groups of scrapers 18 are fixedly connected to the end faces of the first curved plate 14 and the second curved plate 16 respectively. The first curved plate 14 and the second curved plate 16 are spliced ​​into a ring structure. The inner side of the scraper 18 contacts the surface of the piston rod 2. The first curved plate 14 and the second curved plate 16 are an arc-shaped structure as a whole. The inner ring surface of the sealing ring 28 contacts the surface of the piston rod 2. The positioning tube 20 is fixedly connected to the end face of the threaded tube 8. The positioning card groove 15 is a square plate-shaped structure. Two groups of positioning card grooves 15 are symmetrically distributed up and down about the inner surface of the first curved plate 14; The first and second curved plates 14, 16 can be easily separated by the fixing nut 27.

[0023] Embodiment 3: On the basis of embodiment 2, in order to improve the sealing effect of the cylinder body 1, a threaded tube 8 is provided, a sealing gasket 19 is provided in the fixing groove 7, and the sealing gasket 19 is an annular plate structure. The inner side of the cylinder body 1 is provided with a thread, and the threaded tube 8 is screwed into the cylinder body 1. The traction rod 9 and the traction groove 5 are spiral as a whole. The traction rod 9 is inserted into the traction groove 5. The traction rod 9 is fixedly connected to the surface of the threaded tube 8, the sealing strip 11 is fixedly connected to the mounting groove 10, and the sealing strip 11 is inserted into the sealing groove 6. The surface of the positioning tube 20 is provided with a thread, and the fixing nut 12 is screwed onto the positioning tube 20. A limiting spring 21 is provided on the side of the fixing nut 12, and one end of the limiting spring 21 is fixedly connected to the side of the fixing nut 12. A positioning plate 22 is provided on the other end of the limiting spring 21, and the positioning plate 22 is an annular plate structure; When the threaded tube 8 is screwed into the cylinder body 1, the spiral traction rod 9 can be spirally inserted into the traction groove 5, so that the sealing strip 11 provided in the traction rod 9 can be used to be stuck in the sealing groove 6, so that the connection sealing between the threaded tube 8 and the cylinder body 1 can be increased through the cooperation of the sealing strip 11 and the sealing groove 6. Then, the sealing tube 13 is made to contact the end face of the cylinder body 1 by rotating the fixing nut 12, and the sealing between the sealing tube 13 and the end face of the cylinder body 1 can be increased by the rubber plate 25 provided in the limiting fixing groove 24. When the fixing nut 12 is rotated, the sealing plate 23 can be conveniently stuck in the fixing groove 7 and cooperated with the limiting spring 21 to squeeze the sealing gasket 19. The elastic force of the limiting spring 21 can make the sealing plate 23 always squeeze and contact the surface of the sealing gasket 19, thereby further improving the sealing effect.

[0024] In actual use, first screw the threaded tube 8 into the inside of the cylinder body 1, and then cooperate with the sealing strip 11 and the sealing groove 6 to increase the connection sealing between the threaded tube 8 and the cylinder body 1, and then splice the first curved plate 14 and the second curved plate 16 and fix them by installing the nut 27, and then the spliced ​​first curved plate 14 and the second curved plate 16 can be screwed into the threaded groove 26, so that the scraper 18 provided on the end face of the first curved plate 14 and the second curved plate 16 can be conveniently contacted with the surface of the piston rod 2, and finally, the scraper 18 can be used to conveniently clean the particles on the surface of the piston rod 2, thereby ensuring the sealing effect of the piston rod 2 and the cylinder body 1. In addition, when it is necessary to remove the first curved plate 14 and the second curved plate 16, first the spliced ​​first curved plate 1 4 and the second curved plate 16 are rotated so that the first curved plate 14 and the second curved plate 16 are screwed out from the mounting thread groove 26. Then, the mounting nut 27 can be rotated so that the mounting nut 27 is screwed out from the first curved plate 14 and the second curved plate 16, thereby making it possible to make the mounting nut 27 lose the restriction on the first curved plate 14 and the second curved plate 16, and conveniently separate the first curved plate 14 and the second curved plate 16. The cooperation between the positioning clamping plate 17 and the positioning clamping groove 15 can facilitate the insertion of the positioning clamping plate 17 into the positioning clamping groove 15 when splicing the first curved plate 14 and the second curved plate 16, thereby preventing the first curved plate 14 and the second curved plate 16 from offsetting, thereby facilitating the subsequent use of the mounting nut 27 to fix the first curved plate 14 and the second curved plate 16 together.

[0025] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure hydraulic cylinder with a combined sealing structure, comprising: The oil cylinder body has a piston rod disposed therein, a first mounting seat disposed at one end of the oil cylinder body, and a second mounting seat disposed at one end of the piston rod, wherein the oil cylinder body has a traction groove disposed on its inner side surface, a sealing groove disposed on its surface, and a fixing groove disposed on its end surface; Threaded pipe, a traction rod is provided on the surface of the threaded pipe, a mounting groove is provided on the surface of the traction rod, a sealing strip is provided in the mounting groove, a positioning pipe is provided on the end face of the threaded pipe, a fixing nut is provided on the surface of the positioning pipe, and a sealing pipe is provided on the inner side of the fixing nut; A first curved plate, wherein a positioning slot is provided on a side surface of the first curved plate; The second arc-shaped plate has a positioning clamping plate on its side surface, and both the first arc-shaped plate and the second arc-shaped plate have scrapers on their end surfaces.

2. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: A sealing gasket is provided in the fixing groove, and the sealing gasket is an annular plate structure. A thread is provided on the inner side of the oil cylinder body, and the threaded tube is screwed into the oil cylinder body. The traction rod and the traction groove are spiral-shaped as a whole, and the traction rod is inserted into the traction groove, and the traction rod is fixedly connected to the surface of the threaded tube.

3. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: The sealing strip is fixedly connected in the installation groove, the sealing strip is inserted into the sealing groove, a thread is provided on the surface of the positioning tube, a fixing nut is screwed on the positioning tube, a limiting spring is provided on the side of the fixing nut, one end of the limiting spring is fixedly connected to the side of the fixing nut, and a positioning plate is provided on the other end of the limiting spring, and the positioning plate is an annular plate structure.

4. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 3, characterized in that: A sealing plate is provided on the surface of the positioning plate. The sealing plate is an annular plate structure. The sealing plate is inserted into the fixing groove. The sealing tube is fixedly connected to the side of the fixing nut.

5. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 4, characterized in that: The end surface of the sealing tube is provided with a limiting fixing groove, in which a rubber plate is arranged. The rubber plate is an annular plate structure, and the end surface of the positioning tube is provided with a mounting thread groove.

6. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: A sealing ring is provided on the inner annular surface of the positioning tube. Threads are provided on the surfaces of the first arc plate and the second arc plate. The first arc plate and the second arc plate are screwed into the installation thread groove after being spliced ​​together.

7. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: The surfaces of the first arc plate and the second arc plate are screwed with mounting nuts after being spliced ​​together. The positioning card plate is in a square plate-like structure as a whole, and the positioning card plate is inserted into the positioning card slot.

8. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: There are two groups of scrapers, which are fixedly connected to the end faces of the first curved plate and the second curved plate respectively. The first curved plate and the second curved plate are spliced ​​into a ring structure, and the inner side of the scraper contacts the surface of the piston rod.

9. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: The first arc plate and the second arc plate are integrally formed into an arc plate structure, and the inner ring surface of the sealing ring contacts the surface of the piston rod.

10. The high-pressure hydraulic cylinder with a combined sealing structure according to claim 1, characterized in that: The positioning tube is fixedly connected to the end face of the threaded tube, the positioning slot is a square plate structure, two groups of positioning slots are provided, and the two groups of positioning slots are symmetrically distributed up and down about the inner surface of the first arc plate.

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