Combined type waterproof oil seal structure of hub

Abstract

The utility model discloses a hub combined type waterproof oil seal structure, which relates to the field of oil seal, and comprises an outer sealing body and an inner sealing body, a heat dissipation assembly is arranged on one side of the inner part of the outer sealing body, and the heat dissipation assembly comprises a heat dissipation channel and a chute which are arranged on one side of the inner part of the outer sealing body, and a heat dissipation hole arranged on one side of the outer sealing body; a partition plate and a spring are installed on the upper portion in the heat dissipation channel, and one end of the spring is connected with a ball sealer. Through the arrangement of the heat dissipation assembly, when heat is discharged, the temperature between the outer sealing body and the inner sealing body can be reduced, at the moment, air pressure is reduced, a spring is stretched to push a plugging ball and a plugging block to reset, the plugging block plugs a heat dissipation hole, the plugging ball plugs a vent hole, and therefore a heat dissipation channel can be plugged; the sealing performance of the outer sealing body is improved, and water or impurities are prevented from entering the cavity between the outer sealing body and the inner sealing body through the heat dissipation channel.

Description

Technical Field

[0001] The utility model relates to the field of oil seals, in particular to a hub combined waterproof oil seal structure. Background Art

[0002] The wheel hub is a cylindrical metal part whose center is mounted on the axle and whose inner profile supports the tire. When the wheel hub is used normally, in order to prevent the internal lubricating oil from leaking, the wheel hub oil seal is one of the essential components. It blocks the external mud, dust, water vapor, etc. from invading the lubricating oil, so as to ensure the lubrication effect of the wheel hub position and extend the service life.

[0003] According to a Chinese patent publication number CN213929443U, a waterproof wheel hub oil seal is disclosed. When the metal frame needs to be dissipated, the heat generated by the metal frame will pass through the twelve groups of first through holes, the air diffusion cavity and the twelve groups of end covers due to the principle of thermal expansion and contraction, and finally be ejected from the twelve groups of ventilation holes. The internal hot air can be discharged and the metal frame is dissipated.

[0004] Regarding the above-mentioned disclosed patent content, through holes, air diffusion cavities and vents are provided to dissipate heat. However, after the heat is dissipated, since the through holes, air diffusion cavities and vents are connected to the outside, external moisture, water or impurities can easily enter the interior of the oil seal through the vents and air diffusion cavities, thereby accelerating the damage rate of the oil seal, thereby reducing the service life of the oil seal and reducing the waterproof performance of the oil seal. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a wheel hub combined waterproof oil seal structure to solve the technical problem of poor waterproof performance of the oil seal.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wheel hub combined waterproof oil seal structure, comprising an outer sealing body and an inner sealing body, a heat dissipation component is provided on the inner side of the outer sealing body, and the heat dissipation component comprises a heat dissipation channel and a slide groove opened on the inner side of the outer sealing body and a heat dissipation hole opened on the side of the outer sealing body, a partition and a spring are installed above the interior of the heat dissipation channel, one end of the spring is connected to a sealing ball, and one side of the sealing ball is connected to a movable rod extending to the inside of the heat dissipation hole, a sealing block is installed on one end of the movable rod, and a vent is opened on the partition.

[0007] By adopting the above technical solution, when the temperature between the outer sealing body and the inner sealing body increases, the air pressure in the cavity formed between the outer sealing body and the inner sealing body will increase. When the air pressure is high, it will push the blocking ball to move.

[0008] Furthermore, a slider is provided inside the chute, and the bottom of the slider is connected to the blocking ball, and the blocking ball is slidably connected to the chute via the slider.

[0009] By adopting the above technical solution, when the blocking ball moves, it will drive the slider to slide inside the sliding groove, thereby improving the stability of the blocking ball when moving.

[0010] Furthermore, a main sealing lip is provided on the top of the inner sealing body, and a support plate is provided between the inner side of the main sealing lip and the outer wall of the inner sealing body.

[0011] By adopting the above technical solution, the main sealing lip can improve the sealing performance of the inner sealing body and the top of the outer sealing body, and improve the waterproof effect.

[0012] Furthermore, a fixing ring is provided at the bottom end of the inner sealing body, and a supporting plate is installed at the bottom of the outer sealing body.

[0013] By adopting the above technical solution, the provision of the fixing ring can support the secondary sealing lip and improve the stability of the secondary sealing lip.

[0014] Furthermore, a secondary sealing lip is wrapped below the outer wall of the outer sealing body, and a support frame is installed on the top of the support plate.

[0015] By adopting the above technical solution, the provision of the secondary sealing lip can improve the sealing performance between the outer sealing body and the inner sealing body, thereby improving the waterproof effect.

[0016] Furthermore, the outer wall of the inner sealing body is connected to a first positioning ring and a second positioning ring in an annular structure, and the support frame is provided with a first bracket and a second bracket respectively.

[0017] By adopting the above technical solution, the first positioning ring and the second positioning ring can play a positioning role and at the same time improve the stability of the inner sealing body.

[0018] Furthermore, the first positioning ring corresponds to the first bracket, and the second positioning ring corresponds to the second bracket.

[0019] By adopting the above technical solution, the first bracket supports the first positioning ring, and the second bracket can support the second positioning ring.

[0020] Furthermore, a top groove is provided on the outer wall of the inner sealing body, and one side of the support plate is located inside the top groove.

[0021] By adopting the above technical solution, the provision of the top groove facilitates the insertion of the support plate into the interior thereof, thereby facilitating the support of the main sealing lip and improving the stability of the main sealing lip.

[0022] In summary, the present invention has the following beneficial effects:

[0023] The utility model is provided with a heat dissipation component. When the temperature between the outer sealing body and the inner sealing body rises, the air pressure in the cavity formed between the outer sealing body and the inner sealing body will increase. When the air pressure is large, it will push the sealing ball to move toward the heat dissipation hole, so that the sealing ball no longer blocks the vent. At the same time, the sealing ball drives the sealing block to move through the movable rod, and the sealing block no longer blocks the heat dissipation hole. At this time, the heat between the outer sealing body and the inner sealing body will be dissipated through the heat dissipation hole, thereby playing a heat dissipation role. When the heat is discharged, the temperature between the outer sealing body and the inner sealing body will drop. At this time, the air pressure decreases, the spring stretches and then pushes the sealing ball and the sealing block to reset, so that the sealing block blocks the heat dissipation hole, and the sealing ball blocks the vent, thereby sealing the heat dissipation channel, improving the sealing performance of the outer sealing body, preventing water or impurities from entering the cavity between the outer sealing body and the inner sealing body through the heat dissipation channel, thereby improving the waterproof and anti-impurity effects of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the overall explosion structure of the utility model;

[0027] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0028] In the figure: 1. Outer sealing body; 2. Inner sealing body; 3. Main sealing lip; 4. Top groove; 5. Support plate; 6. First positioning ring; 7. Second positioning ring; 8. Support frame; 9. Heat dissipation assembly; 901. Heat dissipation channel; 902. Partition; 903. Vent; 904. Sealing ball; 905. Spring; 906. Movable rod; 907. Sealing block; 908. Heat dissipation hole; 909. Slide groove; 910. Slider; 10. Support plate; 11. Secondary sealing lip; 12. Fixing ring; 13. First bracket; 14. Second bracket. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The following describes an embodiment of the present invention based on its overall structure.

[0031] Example 1:

[0032] A wheel hub combined waterproof oil seal structure, such as Figure 1-Figure 4 As shown, it includes an outer sealing body 1 and an inner sealing body 2. A heat dissipation component 9 is provided on the inner side of the outer sealing body 1, and a main sealing lip 3 is provided on the top of the inner sealing body 2. A support plate 5 is provided between the inner side of the main sealing lip 3 and the outer wall of the inner sealing body 2. The main sealing lip 3 can improve the sealing of the inner sealing body 2 and the top of the outer sealing body 1, and improve the waterproof effect.

[0033] Specifically, the heat dissipation assembly 9 includes a heat dissipation channel 901 and a slide groove 909 opened on one side of the inner part of the outer sealing body 1 and a heat dissipation hole 908 opened on one side of the outer sealing body 1. A partition 902 and a spring 905 are installed above the inner part of the heat dissipation channel 901. One end of the spring 905 is connected to a blocking ball 904, and one side of the blocking ball 904 is connected to a movable rod 906 extending to the inside of the heat dissipation hole 908. When the temperature between the outer sealing body 1 and the inner sealing body 2 rises, the air pressure in the cavity formed between the outer sealing body 1 and the inner sealing body 2 will increase. When the air pressure is large, it will push the blocking ball 904 to move.

[0034] Specifically, a blocking block 907 is installed at one end of the movable rod 906, and the blocking block 907 is located inside the heat dissipation hole 908. The blocking block 907 can block the heat dissipation hole 908 so as to re-block the heat dissipation channel 901. A vent 903 is provided on the partition 902. The diameter of the vent 903 is smaller than the diameter of the blocking ball 904. When the vent 903 blocks the vent 903, water or impurities can be prevented from entering the oil seal through the heat dissipation channel 901, thereby improving the sealing performance of the oil seal. A slider 910 is provided inside the slide groove 909, and the bottom of the slider 910 is connected to the blocking ball 904. The blocking ball 904 is slidably connected to the slide groove 909 through the slider 910. When the blocking ball 904 moves, it will drive the slider 910 to slide inside the slide groove 909, thereby improving the stability of the blocking ball 904 when moving.

[0035] See Figure 1-Figure 3 , a fixing ring 12 is provided at the bottom end of the inner sealing body 2, and the setting of the fixing ring 12 can support the secondary sealing lip 11 and improve the stability of the secondary sealing lip 11. A supporting plate 10 is installed at the bottom of the outer sealing body 1, and the secondary sealing lip 11 is wrapped under the outer wall of the outer sealing body 1. The extended end of the secondary sealing lip 11 is bent and extended between the bottom surface of the supporting plate 10 and the top surface of the fixing ring 12. The setting of the secondary sealing lip 11 can improve the sealing performance of the outer sealing body 1 and the inner sealing body 2, and improve the waterproof effect. A top groove 4 is provided above the outer wall of the inner sealing body 2, and one side of the support plate 5 is located inside the top groove 4. The setting of the top groove 4 facilitates the insertion of the support plate 5 into the interior thereof, thereby facilitating the support of the main sealing lip 3 and improving the stability of the main sealing lip 3.

[0036] Example 2:

[0037] On the basis of the above-mentioned embodiment 1, since the inner sealing body 2 and the outer sealing body 1 are connected by the main sealing lip 3 and the support plate 5, but the inner sealing body 2 is not supported from below, the stability of the inner sealing body 2 is poor, which may affect the sealing performance. Therefore, the stability of the inner sealing body 2 can be improved by setting the following structure.

[0038] See Figure 1-Figure 3 A support frame 8 is installed on the top of the support plate 10. The support frame 8 has an F-shaped structure. The outer wall of the inner sealing body 2 is connected with a first positioning ring 6 and a second positioning ring 7 in an annular structure. A first bracket 13 and a second bracket 14 are respectively provided on the support frame 8. The first positioning ring 6 and the second positioning ring 7 can play a positioning role. The setting of the support frame 8 enables the first positioning ring 6 and the second positioning ring 7 arranged at different parts of the inner sealing body 2 to support the inner sealing body 2, thereby achieving the stability of the structure of the inner sealing body 2 and ensuring the sealing between the inner sealing body 2 and the axle. The first positioning ring 6 corresponds to the first bracket 13, and the second positioning ring 7 corresponds to the second bracket 14, so that the first bracket 13 supports the first positioning ring 6, and the second bracket 14 can support the second positioning ring 7.

[0039] The working principle of the present invention is as follows: first, the arrangement of the primary sealing lip 3 and the secondary sealing lip 11 can improve the sealing between the outer sealing body 1 and the inner sealing body 2, and play a waterproof role. At the same time, the support plate 5 can support the primary sealing lip 3, and the arrangement of the support frame 8 enables the first positioning ring 6 and the second positioning ring 7 arranged at different positions of the inner sealing body 2 to support the inner sealing body 2, thereby achieving the stability of the structure of the inner sealing body 2;

[0040] When the temperature between the outer sealing body 1 and the inner sealing body 2 rises, the air pressure in the cavity formed between the outer sealing body 1 and the inner sealing body 2 will increase. When the air pressure is large, it will push the blocking ball 904 to move toward the heat dissipation hole 908 and squeeze the spring 905 so that the spring 905 is compressed, so that the blocking ball 904 no longer blocks the vent 903. At the same time, the blocking ball 904 drives the blocking block 907 to move through the movable rod 906, and the blocking block 907 no longer blocks the heat dissipation hole 908. At this time, the heat between the outer sealing body 1 and the inner sealing body 2 will be released. The heat is dissipated through the heat dissipation holes 908, thereby playing a heat dissipation role. When the heat is discharged, the temperature between the outer sealing body 1 and the inner sealing body 2 will decrease. At this time, the air pressure decreases, the spring 905 stretches and then pushes the blocking ball 904 and the blocking block 907 to reset, so that the blocking block 907 blocks the heat dissipation holes 908, and the blocking ball 904 blocks the vent 903, thereby sealing the heat dissipation channel 901, improving the sealing performance of the outer sealing body 1, and preventing water or impurities from entering the cavity between the outer sealing body 1 and the inner sealing body 2 through the heat dissipation channel 901.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A wheel hub combined waterproof oil seal structure, comprising an outer seal body (1) and an inner seal body (2), characterized in that: A heat dissipation component (9) is provided on one side of the interior of the outer sealing body (1), and the heat dissipation component (9) comprises a heat dissipation channel (901) and a slide groove (909) opened on one side of the interior of the outer sealing body (1), and a heat dissipation hole (908) opened on one side of the outer sealing body (1); a partition (902) and a spring (905) are installed on the upper part of the interior of the heat dissipation channel (901); a sealing ball (904) is connected to one end of the spring (905); and a movable rod (906) extending to the interior of the heat dissipation hole (908) is connected to one side of the sealing ball (904); a sealing block (907) is installed on one end of the movable rod (906); and a vent hole (903) is opened on the partition (902).

2. A wheel hub combined waterproof oil seal structure according to claim 1, characterized in that: A sliding block (910) is arranged inside the sliding groove (909), and the bottom of the sliding block (910) is connected to the blocking ball (904), and the blocking ball (904) is slidably connected to the sliding groove (909) via the sliding block (910).

3. The wheel hub combined waterproof oil seal structure according to claim 1, characterized in that: The top of the inner sealing body (2) is provided with a main sealing lip (3), and a support plate (5) is provided between the inner side of the main sealing lip (3) and the outer wall of the inner sealing body (2).

4. The wheel hub combined waterproof oil seal structure according to claim 1, characterized in that: A fixing ring (12) is provided at the bottom end of the inner sealing body (2), and a supporting plate (10) is installed at the bottom of the outer sealing body (1).

5. A wheel hub combined waterproof oil seal structure according to claim 4, characterized in that: A secondary sealing lip (11) is wrapped around the lower portion of the outer wall of the outer sealing body (1), and a support frame (8) is installed on the top of the support plate (10).

6. A wheel hub combined waterproof oil seal structure according to claim 5, characterized in that: The outer wall of the inner sealing body (2) is connected to a first positioning ring (6) and a second positioning ring (7) in an annular structure, and the support frame (8) is provided with a first bracket (13) and a second bracket (14), respectively.

7. A wheel hub combined waterproof oil seal structure according to claim 6, characterized in that: The first positioning ring (6) corresponds to the first bracket (13), and the second positioning ring (7) corresponds to the second bracket (14).

8. The wheel hub combined waterproof oil seal structure according to claim 3, characterized in that: A top groove (4) is provided on the outer wall of the inner sealing body (2), and one side of the support plate (5) is located inside the top groove (4).

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