Oil seal structure of rear output end of off-road vehicle transfer case

Abstract

The utility model discloses an off -road vehicle transfer case rear output end's oil seal structure relates to oil seal technical field. The utility model discloses a rubber sealing lip, and the rubber sealing lip inboard fixedly connected with the binding spring, and the binding spring one side is provided with the framework, and the binding spring surface is provided with the heat abstractor. The utility model discloses a heat abstractor, and the heat of the lubricating oil in the rubber sealing lip is conducted to the outside with the heat conduction column, and the lubricating oil flow circulation channel is formed with one -way valve combining into liquid pipe, liquid discharge pipe, and effectively reduces oil seal operating temperature, delays the rubber material aging, and the service life of oil seal under high -temperature working condition is improved significantly, and through setting up the seal mechanism, the bushing and rubber support pad are added between the rubber sealing lip and the output shaft, and the double -seal structure is formed, and even if the bushing wears or fails, the rubber sealing lip can still keep effective sealing, and the sealing reliability and structure redundancy are improved greatly.

Description

Technical Field

[0001] This utility model belongs to the field of oil seal technology, and in particular relates to an oil seal structure at the rear output end of a transfer case in an off-road vehicle. Background Technology

[0002] Off-road vehicles are widely used in specialized transportation, engineering operations, and outdoor exploration due to their superior passability and environmental adaptability. The transfer case, as a core component of the transmission system in four-wheel drive off-road vehicles, primarily functions to distribute engine power to the front and rear drive axles and switch between two-wheel and four-wheel drive depending on road conditions. The rear output end of the transfer case is a crucial link in power transmission, and its reliability directly affects the performance and safety of the entire vehicle; this includes the oil seal treatment at the transfer case output end.

[0003] Existing transfer case oil seals at the rear output end are mostly achieved through a single-layer oil seal structure, consisting of a metal skeleton and a rubber sealing lip vulcanized on the skeleton. The seal relies on the interference fit between the sealing lip and the rotating shaft to create radial pressure, achieving dynamic sealing and preventing lubricant leakage from the transfer case. The transfer case is filled with lubricating oil for gears and bearings. During heavy vehicle loads, uphill driving, or high-speed operation, the gear meshing and bearing operation generate a large amount of heat. Prolonged immersion of the rubber sealing lip in this high-temperature lubricating oil accelerates its thermo-oxidative aging process, causing the rubber material to harden, lose elasticity, and crack, ultimately losing its sealing ability.

[0004] To address this issue, we provide an oil seal structure for the rear output end of a transfer case in an off-road vehicle. Utility Model Content

[0005] The purpose of this utility model is to provide an oil seal structure for the rear output end of the transfer case of an off-road vehicle. Through the cooperation of a heat dissipation mechanism and a sealing mechanism, the problem of short service life of the oil seal structure in the prior art is solved.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to an oil seal structure for the rear output end of a transfer case in an off-road vehicle. It includes a rubber sealing lip, a clamping spring fixedly connected to the inner side of the rubber sealing lip, and a frame on one side of the clamping spring. A heat dissipation mechanism is provided on the surface of the clamping spring, comprising a heat-conducting column on the surface of the clamping spring, an inlet pipe on one side of the heat-conducting column, and a drain pipe on one side of the inlet pipe. A sealing mechanism is provided on one side of the rubber sealing lip, comprising a bushing on one side of the rubber sealing lip and a rubber support pad fixedly connected to one side of the rubber sealing lip.

[0008] The present invention is further configured such that the heat dissipation mechanism includes a first one-way valve sleeved on the surface of the liquid inlet pipe and a second one-way valve sleeved on the surface of the liquid outlet pipe.

[0009] The present invention is further configured such that the heat dissipation mechanism includes a movable plate rotatably connected to the surface of the rubber sealing lip, and a slurry plate fixedly connected to the surface of the movable plate.

[0010] The present invention is further configured such that the heat dissipation mechanism includes a connecting plate disposed on one side of the rubber sealing lip, and a connecting hole is formed on the surface of the connecting plate.

[0011] The present invention is further configured such that the heat dissipation mechanism includes a filter screen fixedly connected to one side of the liquid inlet pipe and the liquid outlet pipe respectively, and the filter screen is fixedly connected to the bushing.

[0012] The present invention is further configured such that the inlet pipe and the outlet pipe are fixedly connected to the bushing, and the rubber support pad is in close contact with the bushing.

[0013] The present invention is further configured such that a dustproof lip is fixedly connected to the inner surface of the rubber sealing lip, and the skeleton is fixedly connected to the rubber sealing lip.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, by setting up a heat dissipation mechanism, uses a heat-conducting column to conduct the heat of the lubricating oil inside the rubber sealing lip to the outside, and combines the inlet pipe, outlet pipe and one-way valve to form a lubricating oil flow circulation channel, effectively reducing the working temperature of the oil seal, delaying the aging of the rubber material, and significantly improving the service life of the oil seal under high temperature conditions. By setting up a sealing mechanism, a bushing and a rubber support pad are added between the rubber sealing lip and the output shaft to form a double sealing structure. Even if the bushing is worn or fails, the rubber sealing lip can still maintain an effective seal, greatly improving the sealing reliability and structural redundancy.

[0016] 2. This utility model enhances the heat dissipation efficiency of the heat-conducting column by setting a movable plate and a paddle plate in the heat dissipation mechanism and using the rotation of the output shaft to drive forced airflow convection, thereby further optimizing the heat dissipation effect. It is suitable for the complex working conditions of high load and high speed of off-road vehicles. By setting filter screens at the inlet of the liquid inlet pipe and the outlet pipe, impurities in the lubricating oil are effectively filtered to prevent particulate matter from adhering to the surface of the heat-conducting column and affecting heat dissipation, thus improving the stability of the system.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a perspective view of an oil seal structure at the rear output end of a transfer case in an off-road vehicle.

[0020] Figure 2 This is a cross-sectional view of the movable plate in the oil seal structure of the rear output end of a transfer case in an off-road vehicle.

[0021] Figure 3 This is a cross-sectional view of the rubber sealing lip in the oil seal structure of the rear output end of a transfer case in an off-road vehicle.

[0022] Figure 4 This is a cross-sectional view of the rubber support pad in the oil seal structure of the rear output end of a transfer case in an off-road vehicle.

[0023] Figure 5 This is a cross-sectional view of the bushing in the oil seal structure at the rear output end of a transfer case in an off-road vehicle.

[0024] In the attached diagram: 1. Rubber sealing lip; 2. Hoop spring; 3. Frame; 4. Heat dissipation mechanism; 41. Heat-conducting column; 42. Liquid inlet pipe; 43. Liquid outlet pipe; 44. First one-way valve; 45. Second one-way valve; 46. Movable plate; 47. Slurry plate; 48. Connecting plate; 49. Connecting hole; 410. Filter screen; 5. Sealing mechanism; 51. Bushing; 52. Rubber support pad; 6. Dustproof lip. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0026] Please see Figures 1-5 This utility model is an oil seal structure for the rear output end of a transfer case in an off-road vehicle, including a rubber sealing lip 1, a clamping spring 2 fixedly connected to the inner side of the rubber sealing lip 1, and a frame 3 provided on one side of the clamping spring 2; a heat dissipation mechanism 4 is provided on the surface of the clamping spring 2, the heat dissipation mechanism 4 includes a heat-conducting column 41 provided on the surface of the clamping spring 2, an inlet pipe 42 provided on one side of the heat-conducting column 41, and an outlet pipe 43 provided on one side of the inlet pipe 42; a sealing mechanism 5 is provided on one side of the rubber sealing lip 1, the sealing mechanism 5 includes a bushing 51 provided on one side of the rubber sealing lip 1, and a rubber support pad 52 fixedly connected to one side of the rubber sealing lip 1.

[0027] As a preferred embodiment of the above: the rubber sealing lip 1 forms radial pressure through an interference fit with the rotating shaft at the output end of the transfer case, achieving dynamic sealing and preventing lubricating oil leakage. The clamping spring 2 provides continuous radial clamping force, enhancing the fit between the rubber sealing lip 1 and the shaft, ensuring good sealing performance even when the shaft runs or wears. The skeleton 3, as the structural support of the oil seal, is usually made of metal and vulcanized with the rubber sealing lip 1, enhancing the overall strength and installation stability of the oil seal and preventing deformation. The heat-absorbing end of the heat-conducting column 41 is located inside the rubber sealing lip 1, and the heat-dissipating end of the heat-conducting column 41 extends to the rubber sealing lip. On the outside, the heat-conducting column 41 is fixedly connected to the skeleton 3 and the rubber sealing lip 1. The heat-conducting column 41 conducts the heat of the lubricating oil to the outside, delaying the aging of the rubber. The inlet pipe 42 and the outlet pipe 43 form a lubricating oil flow circulation channel. The rubber support pad 52 has an arc surface design on the side near the bushing 51, which can ensure that the rubber sealing lip 1 is always in close contact with the bushing 51 during the interference fit. The bushing 51, as the first sealing barrier, cooperates with the rubber sealing lip 1 to form a double sealing structure, improving the sealing reliability. The rubber support pad 52 supports the rubber sealing lip 1, enhances its fit with the bushing 51, and improves the sealing stability. Example

[0028] Please see Figures 1-5 Based on Embodiment 1, the heat dissipation mechanism 4 further includes a first one-way valve 44 sleeved on the surface of the inlet pipe 42, a second one-way valve 45 sleeved on the surface of the outlet pipe 43, a movable plate 46 rotatably connected to the surface of the rubber sealing lip 1, a slurry plate 47 fixedly connected to the surface of the movable plate 46, a connecting plate 48 disposed on one side of the rubber sealing lip 1, a connecting hole 49 opened on the surface of the connecting plate 48, a filter screen 410 fixedly connected to one side of the inlet pipe 42 and the outlet pipe 43 respectively, the filter screen 410 being fixedly connected to the bushing 51, the inlet pipe 42 and the outlet pipe 43 being fixedly connected to the bushing 51, the rubber support pad 52 being in close contact with the bushing 51, a dustproof lip 6 being fixedly connected to the inner surface of the rubber sealing lip 1, and the skeleton 3 being fixedly connected to the rubber sealing lip 1.

[0029] As a preferred embodiment of the above: the first one-way valve 44 and the second one-way valve 45 control the one-way flow of lubricating oil to prevent backflow and ensure stable operation of the heat dissipation system. The movable plate 46 is rotatably connected to the rubber sealing lip 1 through a bearing. The connecting plate 48 is fixedly connected to the movable plate 46. The movable plate 46 and the paddle plate 47 rotate with the shaft, driving the surrounding air to flow and forming forced convection heat dissipation, thereby enhancing the heat dissipation efficiency of the heat-conducting column 41. The connecting plate 48 and the connecting hole 49 are used to connect the heat dissipation mechanism 4 to the rotating part of the transfer case to transmit power and drive the movable plate 46 to rotate. The filter screen 410 filters impurities in the lubricating oil to prevent particulate matter from clogging and adhering to the surface of the heat-conducting column 41, affecting the heat dissipation effect. The dustproof lip 6 is used to prevent external dust and mud and other contaminants from entering the oil seal, protecting the sealing interface and extending the service life of the oil seal.

[0030] The working principle of this utility model is as follows: First, the bushing 51 is assembled onto the surface of the output shaft of the transfer case. Then, the rubber sealing lip 1 is installed on the outside of the bushing 51, and the rubber support pad 52 maintains close contact with the bushing 51. The skeleton 3 is vulcanized with the rubber sealing lip 1 to provide structural support, while the clamping spring 2 continuously applies radial clamping force to ensure dynamic sealing between the sealing lip and the shaft, thereby forming a double seal.

[0031] During the operation of the transfer case, lubricating oil enters the inner area of ​​the rubber sealing lip 1, where its heat is absorbed by the heat-conducting column 41 and conducted to the outside. Simultaneously, the rotation of the output shaft drives the connecting plate 48, the movable plate 46, and the paddle plate 47 to rotate, generating forced convection airflow and accelerating heat dissipation from the surface of the heat-conducting column 41. Due to the temperature difference between the inside of the rubber sealing lip 1 and the outside of the bushing 51, the lubricating oil forms a natural circulation flow between the inlet pipe 42 and the outlet pipe 43, further enhancing the heat dissipation effect. The first one-way valve 44 and the second one-way valve 45 ensure unidirectional flow of the lubricating oil.

[0032] Furthermore, the filter screen 410 filters the lubricating oil flowing into the rubber sealing lip 1, preventing impurities from adhering to the heat-conducting column 41, thereby ensuring heat dissipation efficiency. The dustproof lip 6 effectively blocks external dust and sand from intruding, protecting the sealing interface. Through the synergistic effect of heat dissipation and double sealing, this invention can maintain stable sealing performance under harsh working conditions such as high temperature and heavy load, significantly extending the service life of the oil seal structure.

[0033] 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. An oil seal structure for the rear output end of a transfer case in an off-road vehicle, comprising a rubber sealing lip (1), characterized in that: A clamping spring (2) is fixedly connected to the inner side of the rubber sealing lip (1), and a frame (3) is provided on one side of the clamping spring (2). The surface of the clamping spring (2) is provided with a heat dissipation mechanism (4), which includes a heat-conducting column (41) disposed on the surface of the clamping spring (2), an inlet pipe (42) disposed on one side of the heat-conducting column (41), and an outlet pipe (43) disposed on one side of the inlet pipe (42). A sealing mechanism (5) is provided on one side of the rubber sealing lip (1). The sealing mechanism (5) includes a bushing (51) provided on one side of the rubber sealing lip (1) and a rubber support pad (52) fixedly connected to one side of the rubber sealing lip (1).

2. The oil seal structure at the rear output end of the transfer case of an off-road vehicle according to claim 1, characterized in that: The heat dissipation mechanism (4) further includes a first one-way valve (44) sleeved on the surface of the liquid inlet pipe (42) and a second one-way valve (45) sleeved on the surface of the liquid outlet pipe (43).

3. The oil seal structure at the rear output end of the transfer case of an off-road vehicle according to claim 1, characterized in that: The heat dissipation mechanism (4) further includes a movable plate (46) rotatably connected to the surface of the rubber sealing lip (1) and a slurry plate (47) fixedly connected to the surface of the movable plate (46).

4. The oil seal structure at the rear output end of the transfer case of an off-road vehicle according to claim 1, characterized in that: The heat dissipation mechanism (4) also includes a connecting plate (48) disposed on one side of the rubber sealing lip (1), and a connecting hole (49) is opened on the surface of the connecting plate (48).

5. The oil seal structure at the rear output end of the transfer case of an off-road vehicle according to claim 1, characterized in that: The heat dissipation mechanism (4) also includes a filter screen (410) fixedly connected to one side of the liquid inlet pipe (42) and the liquid outlet pipe (43), and the filter screen (410) is fixedly connected to the bushing (51).

6. The oil seal structure at the rear output end of the transfer case of an off-road vehicle according to claim 1, characterized in that: The inlet pipe (42) and the outlet pipe (43) are fixedly connected to the bushing (51), and the rubber support pad (52) is in close contact with the bushing (51).

7. The oil seal structure at the rear output end of the transfer case of an off-road vehicle according to claim 1, characterized in that: A dustproof lip (6) is fixedly connected to the inner surface of the rubber sealing lip (1), and the skeleton (3) is fixedly connected to the rubber sealing lip (1).

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