Sealing structure for piston rod of hydraulic oil cylinder

Abstract

The sealing structure comprises a device body, an oil cylinder shell is arranged in the device body, one end of the oil cylinder shell is connected with a first installation ring, the piston rod and an installation frame are arranged in the oil cylinder shell, a clamping ring is fixedly arranged on the piston rod in a sleeved mode, a pre-tightening ring is arranged in the clamping ring, and the pre-tightening ring is connected with the installation frame. A pressing disc is arranged at the front end of the pre-tightening ring, a sealing groove is formed in the clamping ring, an inflatable sealing ring is arranged in the sealing groove, one end of the piston rod is connected with a mounting seat, a second mounting ring is inserted into the mounting seat, mounting holes are formed in the pressing disc and the clamping ring, pre-tightening bolts are connected into the mounting holes in a threaded mode, and the piston rod is connected with the piston rod. The piston rod can be sealed, a user can conveniently install and fix the inflatable sealing ring, the safety of the device in the using process is guaranteed, the situation of oil leakage is reduced, the sealing ring can be inflated, the convenience and flexibility of the device are improved, and the application range of the device is widened.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed hydraulic cylinder technology, specifically relating to a sealing structure for a hydraulic cylinder piston rod. Background Technology

[0002] The piston rod of a hydraulic cylinder is the core transmission component of a hydraulic system. It connects the piston to an external actuator (such as a crosshead) and is responsible for converting hydraulic energy into mechanical energy to drive the equipment to achieve reciprocating linear motion.

[0003] The existing sealing method for hydraulic cylinder piston rods mostly involves installing sealing rings on the piston rod. The size of the existing sealing rings is mostly fixed, which is inconvenient for users to adjust. Gaps can easily appear in the sealing rings during installation, causing oil to leak out from the gaps, thus affecting the use of the device. Therefore, we need to upgrade and modify the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a sealing structure for the piston rod of a hydraulic cylinder to solve the problems mentioned in the background art.

[0005] To solve the above problems, the following technical solutions are provided:

[0006] A sealing structure for a hydraulic cylinder piston rod is designed, comprising a device body, the device body containing a cylinder housing, one end of the cylinder housing being connected to a mounting ring, and a piston rod and mounting bracket being disposed within the cylinder housing, a retaining ring being fixedly sleeved on the piston rod, a pre-tightening ring being disposed within the retaining ring, a pressure plate being disposed at the front end of the pre-tightening ring, a sealing groove being formed within the retaining ring, an inflatable sealing ring being disposed within the sealing groove, one end of the piston rod being connected to a mounting base, a second mounting ring being inserted into the mounting base, mounting holes being formed within the pressure plate and the retaining ring, and pre-tightening bolts being screwed into the mounting holes.

[0007] Furthermore, an oil injection hole is provided inside the cylinder housing.

[0008] Furthermore, guide rod one and guide rod two are installed on the outer wall of the mounting frame, and guide rod one and guide rod two are arranged symmetrically vertically.

[0009] Furthermore, a groove is provided inside the retaining ring, and guide rod one and guide rod two are slidably arranged inside the groove.

[0010] Furthermore, a dustproof ring is fixedly sleeved inside the mounting bracket, and an anti-wear ring is installed inside the dustproof ring.

[0011] Furthermore, the mounting base and the second mounting ring are provided with positioning holes, and a positioning rod is inserted into the positioning holes, with a nut screwed onto the positioning rod.

[0012] Furthermore, an inflation port is provided inside the inflatable sealing ring, and a sealing plug is sealed and snapped into the inflation port.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, by setting a retaining ring, sliding groove, pre-tightening ring, pressure plate, mounting hole, pre-tightening bolt, sealing groove and inflatable sealing ring, can seal the piston rod, making it convenient for users to install and fix the inflatable sealing ring, ensuring the safety of the device during use and reducing oil leakage.

[0015] 2. This utility model, by setting an inflatable sealing ring, an air inlet, and a sealing plug, can inflate the sealing ring, making it convenient for users to seal according to the position and size of the sealing groove. This increases the convenience and flexibility of the device, reduces the number of times the sealing ring needs to be replaced, expands the applicability of the device, and adapts to diverse working conditions.

[0016] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a perspective view of the overall structure of a sealing structure for a hydraulic cylinder piston rod according to the present invention;

[0019] Figure 2 This is a cross-sectional view of the overall structure of a sealing structure for a hydraulic cylinder piston rod according to the present invention.

[0020] Figure 3 This is an exploded view of the piston rod structure of a sealing structure for a hydraulic cylinder piston rod according to the present invention;

[0021] Figure 4 This is a perspective view of a sealing structure for a hydraulic cylinder piston rod according to the present invention.

[0022] Figure 5 This is an exploded view of the disassembly and assembly structure of a sealing structure for a hydraulic cylinder piston rod according to the present invention.

[0023] In the diagram: 1. Device body; 2. Cylinder housing; 3. Oil filling hole; 4. Mounting ring one; 5. Piston rod; 6. Guide rod one; 7. Guide rod two; 8. Mounting bracket; 9. Dustproof ring; 10. Anti-wear ring; 11. Mounting seat; 12. Mounting ring two; 13. Positioning hole; 14. Positioning rod; 15. Nut; 16. Snap ring; 17. Slide groove; 18. Preload ring; 19. Pressure plate;

[0024] 20. Mounting hole; 21. Preload bolt; 22. Sealing groove; 23. Inflatable sealing ring;

[0025] 24. Inflation port; 25. Sealing plug. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 As shown in Figure 5, this embodiment provides a sealing structure for a hydraulic cylinder piston rod, including a device body 1. The device body 1 contains a cylinder housing 2. One end of the cylinder housing 2 is connected to a mounting ring 4, and a piston rod 5 and a mounting bracket 8 are provided inside the cylinder housing 2. A retaining ring 16 is fixedly sleeved on the piston rod 5. A pre-tightening ring 18 is provided inside the retaining ring 16. A pressure plate 19 is provided at the front end of the pre-tightening ring 18. A sealing groove 22 is opened in the retaining ring 16. An inflatable sealing ring 23 is provided in the sealing groove 22. One end of the piston rod 5 is connected to a mounting base 11. A mounting ring 12 is inserted into the mounting base 11. Mounting holes 20 are opened in the pressure plate 19 and the retaining ring 16. A pre-tightening bolt 21 is screwed into the mounting hole 20.

[0028] Preferably, an oil filling hole 3 is provided inside the cylinder housing 2. By providing the oil filling hole 3, it is convenient for the user to carry out oil filling treatment inside the cylinder housing 2 in the later stage, which provides convenience for the user.

[0029] Preferably, guide rod 6 and guide rod 7 are installed on the outer wall of the mounting bracket 8, and guide rod 6 and guide rod 7 are arranged symmetrically in the upper and lower parts;

[0030] By setting up mounting bracket 8, guide rod 1 6 and guide rod 2 7, the connectivity and intimacy between the devices are increased.

[0031] Preferably, the retaining ring 16 has a groove 17, and guide rod 6 and guide rod 7 are slidably disposed in the groove 17;

[0032] By setting the slide groove 17, guide rod 1 6 and guide rod 2 7, the direction of movement of the retaining ring 16 can be guided, thus preventing the retaining ring 16 from shifting position during movement.

[0033] Preferably, a dustproof ring 9 is fixedly sleeved inside the mounting bracket 8, and an anti-wear ring 10 is installed inside the dustproof ring 9;

[0034] By setting up a dustproof ring 9, dust is reduced from entering the device through the gaps in the cylinder housing 2. By setting up an anti-wear ring 10, wear on the dustproof ring 9 by the piston rod 5 during long-term use is reduced, thus extending the service life of the dustproof ring 9.

[0035] Preferably, the mounting base 11 and the mounting ring 12 are provided with positioning holes 13, and a positioning rod 14 is inserted into the positioning holes 13, and a nut 15 is screwed onto the positioning rod 14.

[0036] By setting the positioning rod 14 and the nut 15, the mounting base 11 and the second mounting ring 12 can be connected and fixed, ensuring the safety of the second mounting ring 12 during use and making it convenient for users to disassemble and replace it later.

[0037] Preferably, an inflation port 24 is provided inside the inflatable sealing ring 23, and a sealing plug 25 is sealed and snapped into the inflation port 24.

[0038] By setting up an inflation port 24, users can easily inflate the inflatable sealing ring 23, which increases the practicality and convenience of the device. By setting up a sealing plug 25, the leakage of the inflatable sealing ring 23 during use is reduced.

[0039] The working principle and process of this utility model are as follows: During use, the user removes the sealing plug 25 and inflates the inflatable sealing ring 23 through the inflation port 24. After inflation, the user reinserts the sealing plug 25 into the inflation port 24 and places the inflatable sealing ring 23 into the sealing groove 22. Then, the pressure plate 19, pre-tightening ring 18, and retaining ring 16 are sequentially fitted onto the piston rod 5. After fitting, the pre-tightening bolts 21 are sequentially screwed into the mounting holes 20. The retaining ring 16 is then installed on the guide rod 6 and guide rod 7 via the sliding groove 17, thus sealing the piston rod 5. This facilitates the installation and fixation of the inflatable sealing ring 23, ensuring the safety of the device during use, reducing oil leakage, and allowing for inflation of the sealing ring. It also allows the user to seal according to the position and size of the sealing groove 22, increasing the convenience and flexibility of the device, reducing the frequency of sealing ring replacement, expanding the applicability of the device, and adapting to diverse working conditions.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A sealing structure for a hydraulic cylinder piston rod, characterized in that, The device includes a device body (1), which contains a cylinder housing (2). One end of the cylinder housing (2) is connected to a mounting ring (4), and a piston rod (5) and a mounting bracket (8) are provided inside the cylinder housing (2). A retaining ring (16) is fixedly sleeved on the piston rod (5). A pre-tightening ring (18) is provided inside the retaining ring (16). A pressure plate (19) is provided at the front end of the pre-tightening ring (18). A sealing groove (22) is opened inside the retaining ring (16). An inflatable sealing ring (23) is provided inside the sealing groove (22). One end of the piston rod (5) is connected to a mounting base (11). A mounting ring (12) is inserted into the mounting base (11). Mounting holes (20) are opened in the pressure plate (19) and the retaining ring (16). A pre-tightening bolt (21) is screwed into the mounting hole (20).

2. The sealing structure for a hydraulic cylinder piston rod according to claim 1, characterized in that, The cylinder housing (2) has an oil injection hole (3) inside.

3. The sealing structure for a hydraulic cylinder piston rod according to claim 1, characterized in that, Guide rod one (6) and guide rod two (7) are installed on the outer wall of the mounting frame (8), and the guide rod one (6) and guide rod two (7) are arranged symmetrically in the upper and lower parts.

4. A sealing structure for a hydraulic cylinder piston rod according to claim 3, characterized in that, The retaining ring (16) has a groove (17) inside, and guide rod one (6) and guide rod two (7) are slidably arranged in the groove (17).

5. A sealing structure for a hydraulic cylinder piston rod according to claim 1, characterized in that, A dustproof ring (9) is fixedly sleeved inside the mounting bracket (8), and an anti-wear ring (10) is installed inside the dustproof ring (9).

6. A sealing structure for a hydraulic cylinder piston rod according to claim 1, characterized in that, The mounting base (11) and the mounting ring (12) are provided with positioning holes (13), and a positioning rod (14) is inserted into the positioning hole (13), and a nut (15) is screwed onto the positioning rod (14).

7. A sealing structure for a hydraulic cylinder piston rod according to claim 1, characterized in that, An inflation port (24) is provided inside the inflatable sealing ring (23), and a sealing plug (25) is sealed and snapped into the inflation port (24).

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