High-wear-resistance guide structure of hydraulic cylinder

Abstract

The utility model discloses a high wear-resistant guide structure of a hydraulic cylinder, which relates to the technical field of guide structures and comprises a hydraulic cylinder body, the right side of the hydraulic cylinder body is fixedly connected with a fixing block through a fastening screw, the upper end and the lower end of the fixing block are slidably connected with guide rods, and a guide sleeve is slidably connected in the hydraulic cylinder body. A piston rod is fixedly connected into the guide sleeve, a first guide ring is fixedly connected to the left side of the contact position of the outer side of the guide sleeve and the hydraulic cylinder body, a guide sleeve seal is fixedly connected to the middle of the contact position of the outer side of the guide sleeve and the hydraulic cylinder body, and a second guide ring is fixedly connected to the right side of the contact position of the outer side of the guide sleeve and the hydraulic cylinder body. The hydraulic cylinder has the advantages that the motion trail of the piston rod is effectively restrained, and the piston rod is prevented from deviating from a preset linear reciprocating motion path.

Description

Technical Field

[0001] The utility model relates to the technical field of guide structures, in particular to a high wear-resistant guide structure of a hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] During the use of the hydraulic cylinder, the piston rod in the hydraulic cylinder often experiences uneven force when performing linear reciprocating motion for a long time. The piston rod may be subjected to uneven lateral force, which may cause the piston rod to swing or deflect, so that the movement no longer follows the predetermined trajectory. The deviation of the piston rod will lead to a reduction in the contact area with components such as seals and guides, thereby increasing friction and wear, and accelerating the aging and damage of components. In view of the above problems, a high wear-resistant guide structure of a hydraulic cylinder is proposed to solve them. Utility Model Content

[0004] In order to solve the above technical problems, a high wear-resistant guide structure of a hydraulic cylinder is provided, which solves the above-mentioned problem that during the current use of the hydraulic cylinder, the piston rod in the hydraulic cylinder often experiences uneven force during the long-term linear reciprocating motion, which may cause the piston rod to swing or deflect, so that the movement no longer follows the predetermined trajectory. The deviation of the piston rod will lead to a reduction in the contact area with components such as seals and guides, thereby increasing friction and wear, and accelerating the aging and damage of components.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a high wear-resistant guide structure of a hydraulic cylinder, comprising a hydraulic cylinder body, a fixed block on the right side of the hydraulic cylinder body is fixedly connected by a fastening screw, guide rods are slidably connected inside the upper and lower ends of the fixed block, and connecting plates are fixedly connected to the right ends of the two guide rods, a guide sleeve is slidably connected inside the hydraulic cylinder body, a piston rod is fixedly connected inside the guide sleeve, a first guide ring is fixedly connected to the left side of the contact position between the outer side of the guide sleeve and the hydraulic cylinder body, a guide sleeve seal is fixedly connected to the middle position between the outer side of the guide sleeve and the hydraulic cylinder body, a second guide ring is fixedly connected to the right side of the contact position between the outer side of the guide sleeve and the hydraulic cylinder body, a fixed sleeve is fixedly connected to the right side of the contact position between the outer side of the guide sleeve and the hydraulic cylinder body, a fixed sleeve is fixedly connected to the right side of the hydraulic cylinder body, the piston rod is slidably connected to the inside of the fixed sleeve, a third guide ring is fixedly connected to the left side of the contact position between the inner side of the fixed sleeve and the piston rod, and limited blocks are fixedly connected to the left sides of the two guide rods.

[0006] Preferably, a piston rod seal is fixedly connected to a middle position of the inner side of the fixed sleeve at the contact position with the piston rod, and a dust ring is fixedly connected to the right side of the inner side of the fixed sleeve at the contact position with the piston rod.

[0007] Preferably, a through hole is formed through the middle of the right side of the fixing block, the right end of the fixing sleeve is inserted into the through hole, and a fixing sleeve seal is fixedly connected to the outside of the fixing sleeve at the contact position with the hydraulic cylinder body.

[0008] Preferably, a static seal is fixedly connected to the inner side of the guide sleeve at the contact position between the piston rod, and a buckle ring is fixedly connected to the surface of the piston rod and the inside of the guide sleeve.

[0009] Preferably, a fixing nut is fixedly connected to the left side of the piston rod, and the right side of the piston rod passes through the through hole and is fixedly connected to the left side of the connecting plate.

[0010] Preferably, a base is fixedly connected to the left side of the interior of the hydraulic cylinder body, and a placement groove is provided on the right side of the base, and the placement groove is adapted to the fixing nut.

[0011] Preferably, a mounting piece is fixedly connected to the left side of the hydraulic cylinder body.

[0012] Compared with the prior art, the utility model has the following advantages: the utility model provides a guide sleeve inside the hydraulic cylinder body, and provides a first guide ring and a second guide ring at the position where the guide sleeve contacts the hydraulic cylinder body to ensure the stability of the guide sleeve when sliding inside the hydraulic cylinder body; a fixed sleeve is also provided, and a third guide ring is provided between the fixed sleeve and the piston rod to guide the movement of the piston rod; and the movement of the piston rod outside the hydraulic cylinder body is guided by a guide rod slidably connected to the upper and lower sides of the fixed block. The above-mentioned guide structure can effectively constrain the movement trajectory of the piston rod to prevent it from deviating from the predetermined linear reciprocating motion path, thereby improving the stability and reliability of the system, reducing the friction between the piston rod and components such as seals and guides, reducing the degree of wear, and extending the service life of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a top view of the utility model;

[0015] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0016] Figure 4 for Figure 3 A local enlarged schematic diagram of the middle A;

[0017] Figure 5 for Figure 3 A local enlarged schematic diagram of point B in the middle.

[0018] The numbers in the figure are:

[0019] 1. Hydraulic cylinder body; 2. Mounting parts; 3. Fixing block; 4. Through hole; 5. Fastening screw; 6. Guide rod; 7. Connecting plate; 8. Limiting block; 9. Guide sleeve; 10. First guide ring; 11. Guide sleeve seal; 12. Second guide ring; 13. Static seal; 14. Snap ring; 15. Third guide ring; 16. Fixing sleeve seal; 17. Piston rod seal; 18. Dust ring; 19. Fixing sleeve; 20. Piston rod; 21. Fixing nut; 22. Base; 23. Placement groove. DETAILED DESCRIPTION

[0020] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0021] Reference Figure 1-5 As shown, a high wear-resistant guide structure of a hydraulic cylinder comprises a hydraulic cylinder body 1, a fixing block 3 is fixedly connected to the right side of the hydraulic cylinder body 1 by a fastening screw 5, guide rods 6 are slidably connected inside the upper and lower ends of the fixing block 3, and connecting plates 7 are fixedly connected to the right ends of the two guide rods 6, a guide sleeve 9 is slidably connected inside the hydraulic cylinder body 1, a piston rod 20 is fixedly connected inside the guide sleeve 9, a first guide ring 10 is fixedly connected to the left side of the contact position between the outer side of the guide sleeve 9 and the hydraulic cylinder body 1, and a guide sleeve seal 11 is fixedly connected to the middle position of the contact position between the outer side of the guide sleeve 9 and the hydraulic cylinder body 1 The guide sleeve seal 11 is two semicircular silicone rings, which are placed tangentially at the arc. This design can ensure that the guide sleeve seal 11 is in tight contact with the hydraulic cylinder body 1 and the guide sleeve 9 to ensure sealing. A second guide ring 12 is fixedly connected to the right side of the contact position between the outer side of the guide sleeve 9 and the hydraulic cylinder body 1, and a fixed sleeve 19 is fixedly connected to the right side of the inside of the hydraulic cylinder body 1. The piston rod 20 is slidably connected to the inside of the fixed sleeve 19, and a third guide ring 15 is fixedly connected to the left side of the contact position between the inner side of the fixed sleeve 19 and the piston rod 20. The left sides of the two guide rods 6 are fixedly connected to the limiting blocks 8.

[0022] Please refer to Figure 5As shown, a piston rod seal 17 is fixedly connected at the middle position of the contact position between the inner side of the fixed sleeve 19 and the piston rod 20. The cross section of the piston rod seal 17 is Y-shaped. The Y-shaped sealing structure has strong compression resistance, can effectively cope with the high-pressure conditions in the hydraulic system, maintain the sealing effect, and improve the reliability of the system. A dust ring 18 is fixedly connected to the right side of the contact position between the inner side of the fixed sleeve 19 and the piston rod 20. The dust ring 18 is stepped and is mainly used to prevent external dust or impurities from entering the interior of the hydraulic cylinder body 1, causing wear of internal components and shortening the service life of components.

[0023] Specifically, a through hole 4 is formed through the middle of the right side of the fixed block 3, the right end of the fixed sleeve 19 is inserted into the through hole 4, and a fixed sleeve seal 16 is fixedly connected to the outer side of the fixed sleeve 19 at the contact position with the hydraulic cylinder body 1. The fixed sleeve seal 16 further improves the sealing performance of the hydraulic cylinder, which is beneficial to prolonging the service life of the hydraulic cylinder.

[0024] Please refer to Figure 4 As shown, a static seal 13 is fixedly connected at the contact position between the inner side of the guide sleeve 9 and the piston rod 20, and a buckle ring 14 is fixedly connected between the surface of the piston rod 20 and the inside of the guide sleeve 9. The static seal 13 is in an "I" shape, and the middle part is cylindrical, which can provide elastic force to improve the sealing performance of the static seal 13. The buckle ring 14 is a semicircular ring, which is used to prevent the piston rod 20 from shaking left and right.

[0025] Please refer to Figure 4 As shown, a fixing nut 21 is fixedly connected to the left side of the piston rod 20 , and the right side of the piston rod 20 passes through the through hole 4 and is fixedly connected to the left side of the connecting plate 7 .

[0026] Please refer to Figure 3 As shown, a base 22 is fixedly connected to the left side of the hydraulic cylinder body 1, and a placement groove 23 is opened on the right side of the base 22. The placement groove 23 is adapted to the fixing nut 21. The fixing nut 21 is used to fix the piston rod 20 and the guide sleeve 9, and the placement groove 23 helps to extend the stroke of the piston rod 20.

[0027] Specifically, a mounting member 2 is fixedly connected to the left side of the hydraulic cylinder body 1 , and holes are formed through the surface of the mounting member 2 , so that the hydraulic cylinder body 1 can be conveniently mounted in a floating manner.

[0028] Working principle: A guide sleeve 9 is arranged inside the hydraulic cylinder body 1, and a first guide ring 10 and a second guide ring 12 are arranged at the position where the guide sleeve 9 contacts the hydraulic cylinder body 1 to ensure the stability of the guide sleeve 9 when sliding inside the hydraulic cylinder body 1. A fixed sleeve 19 is also arranged, and a third guide ring 15 is arranged between the fixed sleeve 19 and the piston rod 20 to guide the movement of the piston rod 20. The movement of the piston rod 20 outside the hydraulic cylinder body 1 is guided by a guide rod 6 slidably connected to the upper and lower sides of the fixed block 3. The above-mentioned guiding structure can effectively constrain the movement trajectory of the piston rod 20 to prevent it from deviating from the predetermined straight reciprocating motion path, thereby improving the stability and reliability of the system, reducing the friction between the piston rod 20 and components such as seals and guides, reducing the degree of wear, and extending the service life of components.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A highly wear-resistant guide structure of a hydraulic cylinder, comprising a hydraulic cylinder body (1), characterized in that: The right side of the hydraulic cylinder body (1) is fixedly connected to a fixing block (3) by means of a fastening screw (5); the fixing block (3) is slidably connected to guide rods (6) at both upper and lower ends; the right ends of the two guide rods (6) are fixedly connected to a connecting plate (7); the inside of the hydraulic cylinder body (1) is slidably connected to a guide sleeve (9); the inside of the guide sleeve (9) is fixedly connected to a piston rod (20); the outside of the guide sleeve (9) is fixedly connected to a first guide ring (10) at a contact position with the hydraulic cylinder body (1); the outside of the guide sleeve (9) is fixedly connected to the hydraulic cylinder body (1); A guide sleeve seal (11) is fixedly connected at the middle position of the contact position of the cylinder body (1); a second guide ring (12) is fixedly connected to the right side of the outer side of the guide sleeve (9) and the contact position of the hydraulic cylinder body (1); a fixed sleeve (19) is fixedly connected to the right side of the inside of the hydraulic cylinder body (1); the piston rod (20) is slidably connected to the inside of the fixed sleeve (19); a third guide ring (15) is fixedly connected to the left side of the contact position of the piston rod (20); and the left sides of the two guide rods (6) are fixedly connected to limit blocks (8).

2. The high wear-resistant guide structure of a hydraulic cylinder according to claim 1, characterized in that: A piston rod seal (17) is fixedly connected at a middle position between the inner side of the fixed sleeve (19) and the contact position of the piston rod (20), and a dust ring (18) is fixedly connected at the right side of the contact position between the inner side of the fixed sleeve (19) and the piston rod (20).

3. The high wear-resistant guide structure of a hydraulic cylinder according to claim 1, characterized in that: A through hole (4) is formed through the middle of the right side of the fixing block (3); the right end of the fixing sleeve (19) is inserted into the through hole (4); and a fixing sleeve seal (16) is fixedly connected to the outside of the fixing sleeve (19) at a position where the fixing sleeve (19) contacts the hydraulic cylinder body (1).

4. The high wear-resistant guide structure of a hydraulic cylinder according to claim 1, characterized in that: A static seal (13) is fixedly connected at the contact position between the inner side of the guide sleeve (9) and the piston rod (20), and a buckle ring (14) is fixedly connected between the surface of the piston rod (20) and the inside of the guide sleeve (9).

5. The high wear-resistant guide structure of a hydraulic cylinder according to claim 1, characterized in that: The left side of the piston rod (20) is fixedly connected with a fixing nut (21), and the right side of the piston rod (20) passes through the through hole (4) and is fixedly connected to the left side of the connecting plate (7).

6. The high wear-resistant guide structure of a hydraulic cylinder according to claim 1, characterized in that: A base (22) is fixedly connected to the left side of the hydraulic cylinder body (1), and a placement groove (23) is provided on the right side of the base (22), and the placement groove (23) is adapted to the fixing nut (21).

7. The high wear-resistant guide structure of a hydraulic cylinder according to claim 1, characterized in that: The left side of the hydraulic cylinder body (1) is fixedly connected with a mounting component (2).

Images