A sealing device for automotive rubber hose joints

Abstract

This utility model relates to the technical field of automotive rubber hose joint sealing devices, and discloses an automotive rubber hose joint sealing device, including a joint body with a columnar connecting part at one end. The outer surface of the connecting part is sequentially provided with a limiting protrusion, an external thread, and an anti-detachment protrusion. A sealing ring is fitted onto the connecting part, with an elastic sealing lip on its inner side and an annular limiting groove and an outer inclined surface on its outer side that engage with the limiting protrusion. A fastening sleeve is connected to the external thread via an internal thread, and its end has a conical pressing surface that conforms to the outer inclined surface. An oil reservoir is provided on the connecting part, and the oil reservoir is made of silicone rubber or fluororubber. In this utility model, the interference fit of the elastic sealing lip and the force transmission of the conical pressing surface form a double seal. Combined with the lubrication assistance of the oil reservoir, it can adapt to high temperature and high pressure environments, effectively preventing media leakage. The anti-detachment protrusion and the limiting structure work together to avoid loosening or detachment caused by vibration, improving long-term stability.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing devices for automotive rubber hose joints, and in particular to a sealing device for automotive rubber hose joints. Background Technology

[0002] Rubber oil hose fittings are crucial connecting components in automotive oil systems. They ensure the stability and safety of oil flow, guaranteeing the normal operation of critical components such as the engine. Rubber oil hose fittings effectively resist oil corrosion, temperature changes, and high-pressure environments, ensuring leak-proof oil lines and thus improving the overall performance and safety of the vehicle.

[0003] Traditional rubber hose fitting sealing devices typically consist of a sealing ring, a fastening device, and connecting components. The sealing ring prevents oil leakage, the fastening device ensures the joint is securely installed, and the connecting components effectively connect the hose to other components to ensure the integrity of the oil circuit.

[0004] Traditional rubber hose fittings are prone to loosening, primarily because their sealing devices rely on external pressure to maintain a tight seal. However, under high temperature, high pressure, or prolonged use, the fittings and seals experience fatigue or material aging, leading to a decrease in tightening effectiveness. This makes hose fittings susceptible to loosening or leakage, affecting normal vehicle operation and potentially causing fires or other safety hazards. Furthermore, poor sealing also leads to oil loss, impacting engine lubrication and overall performance. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a sealing device for automotive rubber oil pipe joints, which aims to improve the problem that traditional rubber oil pipe joint sealing devices are prone to loosening, affecting the lubrication effect and overall performance of the engine.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a sealing device for a rubber oil pipe joint in automobiles, comprising:

[0007] The connector body has a columnar connecting part at one end, and the outer surface of the connecting part is sequentially provided with a limiting protrusion ring, an external thread and an anti-detachment protrusion.

[0008] A sealing ring is fitted onto the connecting part. Its inner side is provided with an elastic sealing lip, and its outer side is provided with an annular limiting groove and an outer inclined surface that engage with the limiting protrusion ring.

[0009] The fastening sleeve is connected to the external thread via an internal thread, and its end is provided with a tapered pressing surface that fits against the outer inclined surface;

[0010] The connecting part is provided with an oil storage tank, which is made of silicone rubber or fluororubber and has a lip-shaped cross-section that fits tightly against the outer surface of the rubber oil pipe.

[0011] As a further description of the above technical solution:

[0012] The angle between the conical pressing surface and the outer inclined surface is 15°-30° to ensure that the sealing ring is evenly compressed.

[0013] As a further description of the above technical solution:

[0014] The anti-detachment protrusions are distributed circumferentially along the connector body and engage with the anti-detachment groove at the end of the rubber hose.

[0015] As a further description of the above technical solution:

[0016] The oil reservoir is filled with grease to reduce friction between the sealing ring and the rubber oil pipe.

[0017] As a further description of the above technical solution:

[0018] The outer surface of the fastening sleeve is provided with anti-slip knurling, which facilitates manual or tool operation.

[0019] As a further description of the above technical solution:

[0020] The height of the limiting protrusion is greater than the depth of the annular limiting groove, forming an interference fit to prevent the sealing ring from loosening radially.

[0021] As a further description of the above technical solution:

[0022] The elastic sealing lip and the outer surface of the rubber oil pipe are designed with an interference fit to ensure sealing performance under high temperature and high pressure conditions.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the double seal is formed by the interference fit of the elastic sealing lip and the force transmission of the conical pressing surface. With the lubrication assistance of the oil reservoir, it can adapt to high temperature and high pressure environment and effectively prevent media leakage. The anti-detachment ridge and the limiting structure work together to avoid loosening or falling off due to vibration and improve long-term stability.

[0025] 2. In this utility model, rapid assembly is achieved through threaded connection and interference fit, which reduces the number of parts and reduces assembly error; the anti-slip design of the fastening sleeve and the wrench interface are suitable for various operating scenarios, which can be manually and quickly pre-tightened, or precise torque can be applied by tools, and it is compatible with different specifications of rubber oil pipes, taking into account versatility and production efficiency, and facilitating later maintenance and replacement. Attached Figure Description

[0026] Figure 1 This is a perspective view of a sealing device for a rubber oil pipe joint in an automobile, as proposed in this utility model.

[0027] Figure 2 This is a schematic diagram of the connector body of a rubber oil pipe joint sealing device for automobiles proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the sealing ring of a rubber oil pipe joint sealing device for automobiles proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the fastening sleeve of a sealing device for a rubber oil pipe joint in an automobile, as proposed in this utility model.

[0030] Legend:

[0031] 1. Connector body; 11. Columnar connecting part; 12. Limiting protrusion ring; 13. External thread; 14. Anti-detachment protrusion; 15. Oil reservoir; 2. Sealing ring; 21. Elastic sealing lip; 22. Annular limiting groove; 23. Outer bevel; 3. Fastening sleeve; 31. Internal thread; 32. Conical pressing surface; 33. Anti-slip knurling. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-4 One embodiment of this utility model provides: a sealing device for a rubber oil pipe joint in automobiles, comprising:

[0034] The connector body 1 has a columnar connecting part 11 at one end. The outer surface of the connecting part 11 is provided with a limiting protrusion ring 12, an external thread 13, and an anti-detachment protrusion 14 in sequence.

[0035] The sealing ring 2 is fitted onto the connecting part 11. Its inner side is provided with an elastic sealing lip 21, and its outer side is provided with an annular limiting groove 22 that engages with the limiting protrusion ring 12 and an outer inclined surface 23.

[0036] The fastening sleeve 3 is connected to the external thread 13 via the internal thread 31, and its end is provided with a tapered pressing surface 32 that fits against the outer inclined surface 23;

[0037] The connecting part 11 is provided with an oil reservoir 15. The elastic sealing lip 21 is made of silicone rubber or fluororubber and has a lip-shaped cross section. It fits tightly with the outer surface of the rubber oil pipe. The fitting angle between the conical pressing surface 32 and the outer inclined surface 23 is 15°-30° to ensure that the sealing ring 2 is evenly compressed. The anti-detachment ridges 14 are distributed circumferentially along the connector body 1 and engage with the anti-detachment groove at the end of the rubber oil pipe. The oil reservoir 15 is filled with grease to reduce the friction between the sealing ring 2 and the rubber oil pipe. The outer surface of the fastening sleeve 3 is provided with anti-slip knurling 33 for easy manual or tool operation. The height of the limiting ridge 12 is greater than the depth of the annular limiting groove 22 to form an interference fit and prevent the sealing ring 2 from loosening radially. The elastic sealing lip 21 and the outer surface of the rubber oil pipe adopt an interference fit design to ensure sealing performance under high temperature and high pressure environments.

[0038] Working principle: During assembly, the columnar connecting part 11 of the connector body 1 is inserted into the rubber oil tube. The anti-detachment ridge 14 engages with the anti-detachment groove on the inner wall of the oil tube to form an initial mechanical fixation to prevent axial detachment. The sealing ring 2 is fitted onto the connecting part 11, and its annular limiting groove 22 is interference-fitted with the limiting convex ring 12 of the connector body. The height of the limiting convex ring is greater than the depth of the annular limiting groove to achieve radial positioning and prevent loosening. Subsequently, the internal thread 31 of the fastening sleeve 3 is screwed into the external thread 13 of the connector body. The conical pressing surface 32 at the end of the fastening sleeve presses against the outer inclined surface 23 of the sealing ring, converting the axial tightening force into the radial force of the sealing ring. The expansion force causes the elastic sealing lip 21 on the inner side of the sealing ring to fit tightly against the outer surface of the rubber oil pipe to form the main seal. At the same time, the grease in the oil reservoir 15 forms a lubricating film between the sealing lip and the surface of the oil pipe, which reduces friction and fills the micro gaps to assist in sealing. Under high pressure, the elastic sealing lip deforms adaptively due to the medium pressure, increasing the contact stress to ensure the reliability of dynamic sealing. The interference fit between the limiting convex ring and the annular limiting groove further restricts the radial loosening of the sealing ring, while the anti-slip knurling 33 on the outer surface of the fastening sleeve makes it easy to apply sufficient pre-tightening force manually or with tools, ensuring that the overall structure continues to seal stably under high temperature and high pressure.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing device for a rubber hose joint in automobiles, characterized in that, include: The connector body (1) has a columnar connecting part (11) at one end. The outer surface of the connecting part (11) is provided with a limiting protrusion (12), an external thread (13) and an anti-detachment protrusion (14) in sequence. A sealing ring (2) is fitted onto the connecting part (11). It has an elastic sealing lip (21) on its inner side and an annular limiting groove (22) and an outer inclined surface (23) on its outer side that engage with the limiting protrusion ring (12). The fastening sleeve (3) is connected to the external thread (13) through the internal thread (31), and its end is provided with a tapered pressing surface (32) that fits against the outer inclined surface (23); An oil storage tank (15) is provided on the connecting part (11).

2. The sealing device for a rubber oil pipe joint for automobiles according to claim 1, characterized in that: The elastic sealing lip (21) is made of silicone rubber or fluororubber, and has a lip-shaped cross section that fits tightly against the outer surface of the rubber oil pipe.

3. The sealing device for a rubber oil pipe joint for automobiles according to claim 1, characterized in that: The fitting angle between the conical pressing surface (32) and the outer inclined surface (23) is 15°-30° to ensure that the sealing ring (2) is uniformly compressed.

4. The sealing device for a rubber oil pipe joint in an automobile according to claim 1, characterized in that: The anti-detachment protrusions (14) are distributed circumferentially along the connector body (1) and engage with the anti-detachment groove at the end of the rubber oil pipe.

5. A sealing device for a rubber hose joint for automobiles according to claim 1, characterized in that: The oil reservoir (15) is filled with grease to reduce the friction between the sealing ring (2) and the rubber oil pipe.

6. The sealing device for a rubber hose joint for automobiles according to claim 1, characterized in that: The outer surface of the fastening sleeve (3) is provided with anti-slip knurling (33) to facilitate manual or tool operation.

7. A sealing device for a rubber hose joint for automobiles according to claim 1, characterized in that: The height of the limiting protrusion (12) is greater than the depth of the annular limiting groove (22), forming an interference fit to prevent the sealing ring (2) from loosening radially.

8. A sealing device for a rubber hose joint for automobiles according to claim 1, characterized in that: The elastic sealing lip (21) and the outer surface of the rubber oil pipe are designed with an interference fit to ensure sealing performance under high temperature and high pressure conditions.

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