A long-life excavator rod sealing ring

Abstract

This utility model relates to the field of oil seal technology, specifically disclosing a long-life excavator rod sealing ring. It includes a housing with a piston rod, and a sealing ring with a front lip and a rear lip. A retention chamber is provided between the front and rear lips, and a front spiral and a rear spiral are symmetrically arranged within the retention chamber. The long-life excavator rod sealing ring provided by this utility model uses the beveled angle of the front lip to block dirt from the outside of the sealing ring, reducing dirt penetration into the inner ring. Dirt leaking in from the front lip is stored and retained in the retention chamber, and the forward and reverse spirals enhance the blocking effect. Finally, the rear lip collects any remaining dirt in the retention chamber, making it more difficult for dirt to enter the sealing ring, thus providing better protection for the components inside the sealing ring and the sealing ring itself.

Description

Technical Field

[0001] This utility model relates to oil seal technology, specifically a long-life excavator rod sealing ring. Background Technology

[0002] Excavators use hydraulic cylinders to drive the boom, and oil seals are used on the hydraulic cylinders to seal the piston rod movement to ensure the safety of the hydraulic cylinder.

[0003] For example, announcement number CN214945387U, announcement date: 2021-11-30, disclosed a high-temperature resistant piston rod sealing system for mid-to-high-end excavators, including a buffer seal ring, a rod seal ring, and a dustproof seal ring located on the outside of the piston rod.

[0004] The shortcoming of the existing technology is that, due to the large amount of mud and dust in the environment where the excavator is located, the piston rod will inevitably splash mud onto the sealing ring when it is working. As the mud adheres to the surface of the piston rod and moves with it, it will penetrate into the dustproof sealing ring. The mud will cause the inner ring of the sealing ring to wear more quickly, which will severely damage the sealing ring. In turn, the mud will continue to seep in and damage other parts and the sealing ring. Utility Model Content

[0005] The purpose of this invention is to provide a long-life excavator rod sealing ring to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A long-life excavator rod sealing ring includes a housing with a piston rod, and a sealing ring with a front lip and a rear lip, wherein a retention chamber is provided between the front lip and the rear lip;

[0008] The retention chamber is equipped with a front spiral and a rear spiral arranged symmetrically.

[0009] As a further description of the above technical solution: an annular protrusion is provided between the front helix and the rear helix.

[0010] As a further description of the above technical solution: it also includes a liquid chamber formed in the sealing ring, and the liquid chamber is provided with a front chamber communicating with the front lip.

[0011] As a further description of the above technical solution: the liquid chamber is also connected to the rear chamber, and the front chamber supplies liquid to the rear chamber under pressure.

[0012] As a further description of the above technical solution: the annular protrusion is connected and fitted with the liquid chamber.

[0013] As a further description of the above technical solution: the sealing ring sidewall is provided with a liquid inlet communicating with the liquid chamber.

[0014] As a further description of the above technical solution: a unidirectional fluid delivery diaphragm is provided in the inlet.

[0015] As a further description of the above technical solution: a spiral metal ring is provided in the front spiral.

[0016] As a further description of the above technical solution: the front helix is ​​specifically a rubber helical blade.

[0017] As a further description of the above technical solution: the diaphragm is specifically a rubber flap.

[0018] In the above technical solution, the long-life excavator rod sealing ring provided by this utility model has the following beneficial effects: the oblique angle of the front lip blocks dirt from the outside of the sealing ring, reducing dirt from seeping into the inner ring of the sealing ring, and the dirt that leaks in from the front lip is stored in the retention chamber. The forward and reverse spirals are used to enhance the blocking effect. Finally, the rear lip is used to catch the dirt left in the retention chamber, making it more difficult for dirt to enter the sealing ring, and providing better protection for the components inside the sealing ring and the sealing ring. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the piston rod and housing assembly sealing ring provided in an embodiment of this utility model;

[0021] Figure 2 A schematic cross-sectional view of the piston rod and housing assembly sealing ring provided in an embodiment of this utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A;

[0023] Figure 4 A schematic diagram of the sealing ring cross-section provided for an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Piston rod; 2. Housing; 3. Sealing ring; 31. Front lip; 32. Rear lip; 33. Retention chamber; 331. Front spiral; 332. Rear spiral; 34. Ring protrusion; 35. Liquid chamber; 351. Front chamber; 352. Rear chamber; 36. Liquid inlet; 361. Diaphragm. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1-4 This utility model provides a technical solution:

[0028] A long-life excavator rod sealing ring includes a housing 2 on which a piston rod 1 is provided, and a sealing ring 3 on which a front lip 31 and a rear lip 32 are provided, with a retention chamber 33 provided between the front lip 31 and the rear lip 32.

[0029] The retention chamber 33 is equipped with a front spiral 331 and a rear spiral 332 arranged symmetrically.

[0030] Specifically, the front lip 31 is located in the direction of external dirt infiltration, while the rear lip 32 is opposite to the front lip 31, and the cross-section of the retention chamber 33 is frustum-shaped; the front spiral 331 and the rear spiral 332 have opposite spiral directions.

[0031] The angled front lip 31 blocks dirt from the outside of the sealing ring 3, reducing the amount of dirt that seeps into the inner ring of the sealing ring 3. Dirt that leaks in from the front lip 31 is stored in the retention chamber 33, and the multiple spiral blades of the front spiral 331 enhance the blocking effect. Then, the rear spiral 332 forces the dirt to flow in the opposite direction between the spiral blades, further improving the retention capacity. Finally, the rear lip 32 is used to catch the dirt left in the retention chamber 33, making it more difficult for dirt to enter the sealing ring 3, thus providing better protection for the components inside the sealing ring 3 and the sealing ring.

[0032] In another embodiment of the present invention, an annular protrusion 34 is provided between the front spiral 331 and the rear spiral 332.

[0033] The internal space of the retention chamber 33 is divided by the annular protrusion 34, which enhances the ability of the annular protrusion 34 to block dirt. Furthermore, the contact surface between the annular protrusion 34 and the side wall of the piston rod 1 is larger than the contact surface between the front lip 31 and the piston rod 1, which enables the annular protrusion 34 to have good basic blocking ability.

[0034] In another embodiment of the present invention, a liquid chamber 35 is provided in the sealing ring 3, and a front chamber 351 communicating with the front lip 31 is provided on the liquid chamber 35.

[0035] By adding oil to the liquid chamber 35 to fill the front chamber 351, the front chamber 351 can be stably pressurized at the end of the front lip 31, thereby maintaining stable contact between the front lip 31 and the side wall of the piston rod 1, thus reducing the gaps where dirt leaks inward.

[0036] In another embodiment of the present invention, the liquid chamber 35 is also connected to the rear chamber 352, and the front chamber 351 supplies liquid to the rear chamber 352 under pressure.

[0037] Specifically, the rear chamber 352 and the front chamber 351 are arranged symmetrically with respect to the liquid chamber 35.

[0038] By maintaining a constant pressure in the rear chamber 352 and the front chamber 351, and when excessive dirt accumulates in the front spiral 331, the accumulated dirt puts pressure on the side wall of the retention chamber 33, and the pressure in the front chamber 351 causes the oil inside to be transported to the liquid chamber 35 and the rear chamber 352, causing the side wall of the retention chamber 33 at the position of the rear spiral 332 to expand. Therefore, the rear lip 32 and the rear spiral 332 are both subjected to pressure transmission, which makes the rear lip 32, the rear spiral 332 and the side wall of the piston rod 1 more closely contacted, and further improves the blocking ability.

[0039] In another embodiment of this utility model, the annular protrusion 34 is connected and engaged with the liquid chamber 35.

[0040] When hydraulic pressure is transmitted through the liquid chamber 35, it acts on the annular protrusion 34, causing the elastic annular protrusion 34 to deform and increase the contact surface between its inner ring and the side wall of the piston rod 1, thereby improving the sealing and blocking effect.

[0041] In another embodiment of the present invention, a liquid inlet 36 communicating with the liquid chamber 35 is provided on the side wall of the sealing ring 3.

[0042] The liquid inlet 36 allows for the easy injection of high-density liquid oil into the liquid chamber 35, thereby enabling the liquid oil to have excellent power transmission performance.

[0043] In another embodiment of the present invention, a unidirectional fluid delivery diaphragm 361 is provided in the inlet 36.

[0044] The diaphragm 361 prevents leakage from the liquid chamber 35 to the inlet 36 when the liquid is under pressure, and also facilitates the addition of oil to the inlet 36 via the diaphragm 361.

[0045] In another embodiment of the present invention, a spiral metal ring is provided in the front spiral 331.

[0046] The metal ring enables the front spiral 331 to function as a skeleton, ensuring that the inner ring of the front spiral 331 is stably fitted to the side wall of the piston rod 1, and also making the sealing ring 3 more stable and extending its service life.

[0047] In another embodiment of this utility model, the front spiral 331 is specifically a rubber spiral plate.

[0048] The rubber spiral blades enable the front spiral 331 to achieve excellent connection and sealing capabilities, thus realizing multi-layer barrier protection.

[0049] In another embodiment of this utility model, the diaphragm 361 is specifically a rubber flap.

[0050] The rubber diaphragm flap reduces the cost of using and maintaining the sealing ring 3, and also ensures a good seal, making it more effective in oil injection and leak prevention.

[0051] Working principle: The oblique angle of the front lip 31 blocks dirt from the outside of the sealing ring 3, reducing the amount of dirt that seeps into the inner ring of the sealing ring 3. Dirt that leaks in from the front lip 31 is stored in the retention chamber 33, and the multiple spiral blades of the front spiral 331 enhance the blocking effect. Then, the rear spiral 332 forces the dirt to flow in the opposite direction between the spiral blades, further improving the retention capacity. Finally, the rear lip 32 is used to catch the dirt left in the retention chamber 33, making it more difficult for dirt to enter the sealing ring 3.

[0052] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A long-life excavator rod sealing ring, comprising a housing (2) on which a piston rod (1) is disposed, characterized in that, It also includes a sealing ring (3) with a front lip (31) and a rear lip (32), and a retention chamber (33) is provided between the front lip (31) and the rear lip (32). The retention chamber (33) is provided with a front spiral (331) and a rear spiral (332) arranged symmetrically.

2. The long-life excavator rod sealing ring according to claim 1, characterized in that, An annular protrusion (34) is provided between the front helix (331) and the rear helix (332).

3. A long-life excavator rod sealing ring according to claim 2, characterized in that, It also includes a liquid chamber (35) opened in the sealing ring (3), and the liquid chamber (35) is provided with a front chamber (351) connected to the front lip (31).

4. A long-life excavator rod sealing ring according to claim 3, characterized in that, The liquid chamber (35) is also connected to the rear chamber (352), and the front chamber (351) supplies liquid to the rear chamber (352) under pressure.

5. A long-life excavator rod sealing ring according to claim 3, characterized in that, The annular protrusion (34) is connected and engaged with the liquid chamber (35).

6. A long-life excavator rod sealing ring according to claim 3, characterized in that, The sealing ring (3) has an inlet (36) on its side wall that communicates with the liquid chamber (35).

7. A long-life excavator rod sealing ring according to claim 6, characterized in that, The inlet (36) is provided with a unidirectional fluid delivery diaphragm (361).

8. A long-life excavator boom sealing ring according to claim 7, characterized in that, A spiral metal ring is provided in the front spiral (331).

9. A long-life excavator rod sealing ring according to claim 8, characterized in that, The front helix (331) is specifically a rubber helical blade.

10. A long-life excavator rod sealing ring according to claim 9, characterized in that, The diaphragm (361) is specifically a rubber flap.

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