Transmission sealing structure and vehicle

Abstract

The utility model discloses a transmission sealing structure and a vehicle, the transmission sealing structure includes: knuckle, hub bearing, drive shaft and seal subassembly, knuckle is formed with connecting hole, hub bearing includes connecting flange, inner ring and outer ring, outer ring is provided in connecting hole, connecting flange is provided in the inner ring, drive shaft and connecting flange transmission connection, and the seal subassembly is provided with seal subassembly. The sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the steering knuckle and the driving shaft, and the second sealing ring is arranged between the hub bearing and the driving shaft. According to the transmission sealing structure disclosed by the utility model, the first sealing ring can play a good sealing and protecting effect on the area, positioned on the inner side of the first sealing ring, between the steering knuckle and the driving shaft, and the second sealing ring can prevent dust, rainwater and the like from entering the transmission matching position of the connecting flange and the driving shaft; the transmission matching position of the connecting flange and the driving shaft is prevented from being polluted and corroded, and the transmission reliability between the connecting flange and the driving shaft is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to a transmission sealing structure and vehicle. BACKGROUND

[0002] With the improvement of people's living standards, vehicles gradually enter thousands of households. Among them, the driving hub is driven to rotate through the transmission connection of the driving shaft and the hub bearing, so as to realize the driving of the vehicle.

[0003] But in the driving process of the vehicle, dust, rainwater and the like will enter the transmission connection position of the driving shaft and the hub bearing, resulting in the risk of pollution and corrosion of the hub bearing and the transmission connection position of the driving shaft and the hub bearing, and the hub bearing is usually provided with a magnetic ring to facilitate obtaining the hub rotating speed, and dust and rainwater and the like contacting the magnetic ring can easily cause the magnetic ring to fail, directly affecting the stability of the transmission of the transmission device. Therefore, there is room for improvement. UTILITY MODEL CONTENTS

[0004] The utility model discloses a transmission sealing structure, the transmission sealing structure has the advantage that prevents dust, rainwater and the like from causing the transmission matching position of the connecting flange and the driving shaft to be polluted and corroded.

[0005] According to the transmission sealing structure of the utility model first aspect embodiment, including: knuckle, form has the connecting hole;Hub bearing, including connecting flange and the inner ring and outer ring that can rotate oppositely, the outer ring is located in the connecting hole, the connecting flange is located in the inner ring;Driving shaft, with the transmission connection of connecting flange;Sealing assembly, including first sealing ring and second sealing ring, the first sealing ring is located between the knuckle and the driving shaft, and the second sealing ring is located between the hub bearing and the driving shaft.

[0006] According to the transmission sealing structure of the utility model first aspect embodiment, through the first sealing ring, good sealing protection effect can be achieved in the area between the knuckle and the driving shaft inside the first sealing ring, and through the second sealing ring, dust, rainwater and the like can be prevented from entering the transmission matching position of the connecting flange and the driving shaft, so that dust, rainwater and the like can be prevented from causing the transmission matching position of the connecting flange and the driving shaft to be polluted and corroded, to ensure the reliability of the transmission between the connecting flange and the driving shaft.

[0007] According to some embodiments of the utility model, the first sealing ring is located on the side of the knuckle towards the driving shaft, the first sealing ring is arranged on one of the knuckle and the driving shaft, the other of the knuckle and the driving shaft forms a matching groove open towards the first sealing ring, and the first sealing ring is inserted into the matching groove.

[0008] According to some embodiments of the present application, the first sealing ring is arranged at intervals with the inner wall surface of the matching groove.

[0009] According to some embodiments of the present application, the first sealing ring is connected with one of the knuckle and the drive shaft through clamping.

[0010] According to some embodiments of the present application, a plurality of first clamping structures are arranged at intervals in the circumferential direction on the inner circumferential surface of the connecting hole, a plurality of second clamping structures are arranged at intervals in the circumferential direction on the first sealing ring, and the plurality of first clamping structures and the plurality of second clamping structures are connected through clamping one by one.

[0011] According to some embodiments of the present application, the second sealing ring is arranged on the side of the hub bearing facing the drive shaft, and the second sealing ring is arranged on one of the hub bearing and the drive shaft and interferes with the other of the hub bearing and the drive shaft.

[0012] According to some embodiments of the present application, the second sealing ring is arranged on the inner ring and interferes with the drive shaft.

[0013] According to some embodiments of the present application, the bottom of the inner circumferential surface of the connecting hole is formed with a drainage hole extending in the up-down direction, and the end of the drainage hole away from the connecting hole extends to the outer surface of the knuckle.

[0014] According to some embodiments of the present application, in the direction from front to back, the drainage hole extends downwardly and obliquely.

[0015] According to some embodiments of the present application, the included angle range a between the extension direction of the drainage hole and the horizontal direction satisfies 30°≤a≤90°.

[0016] According to some embodiments of the present application, the inner diameter of the drainage hole ranges from 5mm to 8mm.

[0017] The present application provides a vehicle in the second aspect.

[0018] The vehicle according to the second aspect of the present application comprises the transmission sealing structure.

[0019] According to the vehicle of the second aspect of the present application, the first sealing ring can achieve good sealing protection effect in the area between the knuckle and the drive shaft inside the first sealing ring, and the second sealing ring can prevent dust, rainwater and the like from entering the transmission matching position of the connecting flange and the drive shaft, thereby avoiding pollution and corrosion of the transmission matching position of the connecting flange and the drive shaft caused by dust, rainwater and the like, to ensure the reliability of the transmission between the connecting flange and the drive shaft.

[0020] The additional aspects and advantages of the present application will be given partly in the following description, partly will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a partial sectional view of the transmission sealing structure according to an embodiment of the present application;

[0022] Figure 2 is Figure 1 is a partial enlarged view of the A area in the middle;

[0023] Figure 3 is a partial enlarged view of the first sealing ring of the transmission sealing structure according to an embodiment of the present application;

[0024] Figure 4 is a structure schematic view of the knuckle of the transmission sealing structure according to an embodiment of the present application;

[0025] Figure 5 is a sectional view of the knuckle of the transmission sealing structure according to an embodiment of the present application;

[0026] Figure 6 is a schematic view of the first sealing ring of the transmission sealing structure according to an embodiment of the present application;

[0027] Figure 7 is a partial enlarged view of the second sealing ring of the transmission sealing structure according to an embodiment of the present application;

[0028] Figure 8 is a partial sectional view of the drain hole of the knuckle of the transmission sealing structure according to an embodiment of the present application;

[0029] Figure 9 is a schematic view of the drive shaft of the transmission sealing structure according to an embodiment of the present application;

[0030] Figure 10 is a schematic view of the hub bearing and the second sealing ring of the transmission sealing structure according to an embodiment of the present application.

[0031] REFERENCE NUMERALS:

[0032] 100, transmission sealing structure;

[0033] 1, knuckle; 11, connecting hole; 12, first clamping structure; 13, drain hole;

[0034] 2, hub bearing; 21, connecting flange; 211, first end face tooth; 22, inner ring; 23, outer ring; 24, magnetic ring;

[0035] 3, drive shaft; 31, matching groove; 32, second end face tooth;

[0036] 4. Sealing assembly; 41. First sealing ring; 411. Sealing ring body; 412. Second clamping structure; 42. Second sealing ring; 421. Sealing ring frame; 422. Flexible sealing strip. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0039] The transmission sealing structure 100 according to an embodiment of the first aspect of the present invention will be described below with reference to the accompanying drawings.

[0040] like Figures 1 to 10 As shown, the transmission sealing structure 100 according to the embodiment of the first aspect of the present invention includes: a steering knuckle 1, a wheel hub bearing 2, a drive shaft 3 and a sealing assembly 4, the steering knuckle 1 is formed with a connecting hole 11, the wheel hub bearing 2 includes a connecting flange 21 and an inner ring 22 and an outer ring 23 that can rotate relative to each other, the outer ring 23 is arranged in the connecting hole 11, the connecting flange 21 is arranged in the inner ring 22, and the outer ring 23 is arranged in the connecting hole 11, the drive shaft 3 is transmission-connected with the connecting flange 21, wherein the connecting flange is used to connect to the wheel hub, so that the rotation of the drive shaft 3 can drive the connecting flange 21 to rotate relative to the steering knuckle 1, and then drive the wheel hub to rotate to drive the vehicle to move.

[0041] The sealing assembly 4 comprises a first sealing ring 41 and a second sealing ring 42, the first sealing ring 41 is arranged between the steering knuckle 1 and the drive shaft 3, and the second sealing ring 42 is arranged between the wheel hub bearing 2 and the drive shaft 3. It can be understood that the first sealing ring 41 can effectively prevent dust, sand and the like from entering the area between the steering knuckle 1 and the drive shaft 3 inside the first sealing ring 41, that is, the first sealing ring 41 can effectively seal and protect the area between the steering knuckle 1 and the drive shaft 3 inside the first sealing ring 41. For example, the first sealing ring 41 can prevent dust, sand and the like from entering the connecting hole 11 and contacting the wheel hub bearing 2. It can be understood that the wheel hub bearing 2 is usually provided with a magnetic ring 24 to facilitate obtaining the rotating speed of the connecting flange 21, and the first sealing ring 41 can prevent dust, sand and the like from contacting the magnetic ring 24 and causing the magnetic ring 24 to fail.

[0042] At the same time, the second sealing ring 42 can effectively prevent dust, rain and the like from entering the area between the wheel hub bearing 2 and the drive shaft 3 inside the second sealing ring 42. It can be understood that the transmission matching position of the connecting flange 21 and the drive shaft 3 is located on the inner circumferential side of the wheel hub bearing 2, for example, the first end surface tooth 211 is formed on the axial end surface of the connecting flange 21 facing the drive shaft 3, the second end surface tooth 32 is formed on the axial end surface of the drive shaft 3 facing the connecting flange 21, the first end surface tooth 211 is engaged with the second end surface tooth 32, and the second sealing ring 42 can prevent dust, rain and the like from entering the meshing connection between the connecting flange 21 and the drive shaft 3. That is, the second sealing ring 42 can prevent dust, rain and the like from entering the transmission matching position of the connecting flange 21 and the drive shaft 3, thereby preventing dust, rain and the like from causing the transmission matching position of the connecting flange 21 and the drive shaft 3 to be polluted and corroded, so as to ensure the reliability of the transmission between the connecting flange 21 and the drive shaft 3.

[0043] According to the transmission sealing structure 100 of the first aspect of the present application, the first sealing ring 41 can effectively seal and protect the area between the steering knuckle 1 and the drive shaft 3 inside the first sealing ring 41, and the second sealing ring 42 can prevent dust, rain and the like from entering the transmission matching position of the connecting flange 21 and the drive shaft 3, thereby preventing dust, rain and the like from causing the transmission matching position of the connecting flange 21 and the drive shaft 3 to be polluted and corroded, so as to ensure the reliability of the transmission between the connecting flange 21 and the drive shaft 3.

[0044] In a specific example, the second sealing ring 42 surrounds the outer circumferential side of the first end surface tooth 211 of the connecting flange 21, and the first sealing ring 41 surrounds the outer circumferential side of the second sealing ring 42, so that the first sealing ring 41 and the second sealing ring 42 can form double sealing to improve the sealing effect.

[0045] According to some embodiments of the present utility model, the first sealing ring 41 is located on the side of the knuckle 1 facing the drive shaft 3, the first sealing ring 41 is arranged on one of the knuckle 1 and the drive shaft 3, the other of the knuckle 1 and the drive shaft 3 forms a matching groove 31 open towards the first sealing ring 41, and the first sealing ring 41 is inserted into the matching groove 31. Among them, the first sealing ring 41 can be arranged on the knuckle 1, and the matching groove 31 is formed on the side of the drive shaft 3 facing the first sealing ring 41; or the first sealing ring 41 can be arranged on the drive shaft 3, and the matching groove 31 is formed on the side of the knuckle 1 facing the first sealing ring 41, which is not limited specifically here.

[0046] Here, the first sealing ring 41 is arranged on the knuckle 1 as an example, that is, the end of the first sealing ring 41 away from the knuckle 1 extends into the matching groove 31, so that the part of the first sealing ring 41 extending into the matching groove 31 can jointly define a labyrinth seal structure with the inner side of the matching groove 31 to prolong the path of dust, sand and the like on the outer peripheral side of the first sealing ring 41 into the inner peripheral side of the first sealing ring 41, for example, the dust on the outer peripheral side of the first sealing ring 41 needs to pass through the gap between the outer peripheral surface of the first sealing ring 41 and the matching groove 31, the gap between the side of the first sealing ring 41 away from the knuckle 1 and the matching groove 31 and the gap between the inner peripheral surface of the first sealing ring 41 and the matching groove 31 in sequence before entering the inner peripheral side of the first sealing ring 41. Therefore, through the plug-in cooperation of the first sealing ring 41 and the matching groove 31, the sealing protection effect of the area between the drive shaft 3 and the knuckle 1 on the inner peripheral side of the first sealing ring 41 can be improved.

[0047] In one specific example, the first sealing ring 41 is arranged on the outer peripheral edge of the end of the connecting hole 11 axially facing the drive shaft 3, and the matching groove 31 is formed on the side of the drive shaft 3 axially facing the knuckle 1 and in the shape of a ring.

[0048] According to some embodiments of the present utility model, the first sealing ring 41 and the inner wall surface of the matching groove 31 are arranged in a spaced manner. It can be understood that when the vehicle is running, the drive shaft 3 rotates relative to the knuckle 1. Therefore, by arranging the first sealing ring 41 and the inner wall surface of the matching groove 31 in a spaced manner, friction between the first sealing ring 41 and the inner side of the matching groove 31 can be avoided, so that the first sealing ring 41 can be prevented from being damaged by friction, thereby ensuring the sealing performance of the first sealing ring 41.

[0049] For example, the first sealing ring 41 is arranged on the knuckle 1, that is, the first sealing ring 41 has no contact point with the drive shaft 3, so that when the drive shaft 3 rotates relative to the knuckle 1, the drive shaft 3 can avoid contacting the first sealing ring 41 to cause the first sealing ring 41 to wear. In one specific example, the first sealing ring 41 is a nylon part, so that the first sealing ring 41 has good structural stability.

[0050] According to some embodiments of the utility model, the first sealing ring 41 is connected with one of the knuckle 1 and the drive shaft 3 in a clamping manner. It can be understood that the clamping connection is simple, which can reduce the installation difficulty of the first sealing ring 41, thereby improving the assembly efficiency of the sealing assembly 4. In addition, the clamping connection relationship is relatively easy to disengage, for example, by separating the clasp of the first sealing ring 41 and the knuckle 1 or the drive shaft 3, the first sealing ring 41 can be removed, thereby reducing the difficulty of replacing the first sealing ring 41 subsequently.

[0051] According to some embodiments of the utility model, a plurality of first clamping structures 12 are arranged on the inner circumferential surface of the connecting hole 11 in a circumferentially spaced manner, a plurality of second clamping structures 412 are formed on the first sealing ring 41 in a circumferentially spaced manner, and the plurality of first clamping structures 12 and the plurality of second clamping structures 412 are connected in a one-to-one correspondence. That is, the first sealing ring 41 is arranged on the knuckle 1, and through the one-to-one correspondence connection of the plurality of first clamping structures 12 and the plurality of second clamping structures 412, the connection position of the first sealing ring 41 and the knuckle 1 in the circumferential direction of the connecting hole 11 can be increased, thereby improving the stability of the connection between the first sealing ring 41 and the knuckle 1, to prevent the first sealing ring 41 from falling off and affecting the sealing protection effect.

[0052] In one specific example, the first sealing ring 41 further includes a sealing ring body 411, the sealing ring body 411 is annular, one end of the sealing ring body 411 is inserted into the matching groove 31 in the axial direction of the connecting hole 11, the second clamping structure 412 is arranged on the outer circumferential surface of the sealing ring body 411, and the second clamping structure 412 is located at the end of the sealing ring body 411 away from the matching groove 31.

[0053] According to some embodiments of the utility model, the second sealing ring 42 is arranged on the side of the hub bearing 2 facing the drive shaft 3, and the second sealing ring 42 is arranged on one of the hub bearing 2 and the drive shaft 3 and interferes with the other of the hub bearing 2 and the drive shaft 3. That is, the second sealing ring 42 can better fill the gap between the end of the hub bearing 2 close to the drive shaft 3 and the drive shaft 3, so as to completely separate the space on the inner and outer sides of the second sealing ring 42, thereby the second sealing ring 42 can have a good blocking effect on the liquid, so as to improve the sealing protection effect of the second sealing ring 42 on the transmission connection position of the drive shaft 3 and the connecting flange 21.

[0054] According to some embodiments of the present application, the second sealing ring 42 is arranged on the inner ring 22 and interferes with the driving shaft 3. It can be understood that the hub bearing 2 comprises the inner ring 22, the outer ring 23 and the magnetic ring 24 arranged between the inner ring 22 and the outer ring 23, the outer ring 23 is arranged in the connecting hole 11, the connecting flange 21 is arranged in the inner ring 22, when the driving shaft 3 rotates, the connecting flange 21 and the inner ring 22 of the hub bearing 2 are driven to rotate relative to the outer ring 23 of the hub bearing 2. That is, the driving shaft 3 rotates synchronously with the inner ring 22 of the hub bearing 2, so that the driving shaft 3 and the inner ring 22 of the hub bearing 2 remain relatively stationary. Therefore, arranging the second sealing ring 42 on the inner ring 22 of the hub bearing 2 can keep the second sealing ring 42 and the driving shaft 3 relatively stationary, thereby preventing the second sealing ring 42 from rotating relative to the driving shaft 3 and generating friction.

[0055] In one specific example, the second sealing ring 42 comprises a sealing ring skeleton 421 and a flexible sealing strip 422 arranged on the sealing ring skeleton 421, the sealing ring skeleton 421 and the flexible sealing strip 422 are both annular, the sealing ring skeleton 421 is a metal piece, which has good support effect on the flexible sealing strip 422, facilitating the press fitting of the sealing ring skeleton 421 on the inner ring 22 of the hub bearing 2, that is, the press fitting connection of the second sealing ring 42 and the inner ring 22 of the hub bearing 2 can be achieved, and the connecting components required for the installation of the second sealing ring 42 are omitted, so as to simplify the installation structure of the second sealing ring 42 and reduce the installation cost. In addition, the flexible sealing strip 422 can be made of flexible material such as rubber, so as to ensure that the flexible sealing strip 422 can be closely attached to the driving shaft 3 through the flexible surface, so as to improve the sealing effect of the second sealing ring 42.

[0056] According to some embodiments of the present application, the bottom of the inner circumferential surface of the connecting hole 11 is formed with a drainage hole 13 extending in the up-down direction, and the end of the drainage hole 13 away from the connecting hole 11 extends to the outer surface of the knuckle 1. That is, the drainage hole 13 can form a communication drainage channel between the connecting hole 11 and the space outside the knuckle 1, and because the drainage hole 13 is located at the bottom of the inner circumferential surface of the connecting hole 11, the liquid in the connecting hole 11, such as rainwater and mudwater, can gather at the drainage hole 13 under the action of gravity and be promptly discharged to the outside of the knuckle 1 through the drainage hole 13. Therefore, rainwater and mudwater can be prevented from remaining in the connecting hole 11, so as to avoid corrosion of the components located in the connecting hole 11, such as the hub bearing 2.

[0057] According to some embodiments of the utility model, in the direction from front to back, the drain hole 13 extends downwardly and obliquely. That is, the drain hole 13 extends downwardly and obliquely rearward. Therefore, when the vehicle is driving forward, the sand, mud and the like stirred up by the tire can be prevented from entering the drain hole 13 and piling up or moving reversely along the drain hole 13 to the connecting hole 11, so that the drain function of the drain hole 13 can be ensured, and the drain hole 13 is prevented from forming a channel for introducing the sand, mud and the like into the connecting hole 11, thereby improving the reliability of the drain hole 13.

[0058] According to some embodiments of the utility model, the included angle a between the extension direction of the drain hole 13 and the horizontal direction satisfies 30°≤a≤90°. It can be understood that the smaller the included angle between the extension direction of the drain hole 13 and the horizontal direction, the more the extension direction of the drain hole 13 approaches to the horizontal extension, and the smaller the inclination degree of the drain hole 13. If the inclination degree of the drain hole 13 is too small, the efficiency of discharging the rainwater, mud and the like in the connecting hole 11 through the drain hole 13 will be reduced. Therefore, by controlling the included angle between the extension direction of the drain hole 13 and the horizontal direction to be not less than 30°, the drain hole 13 can have sufficient inclination degree to smoothly discharge the rainwater, mud and the like in the connecting hole 11, thereby improving the drainage effect of the drain hole 13. The included angle between the extension direction of the drain hole 13 and the horizontal direction can be 30°, 40°, 50°, 60°, 70°, 80°, 90° and the like, which is not limited here.

[0059] According to some embodiments of the utility model, the inner diameter of the drain hole 13 ranges from 5mm to 8mm. It can be understood that the larger the inner diameter of the drain hole 13, the larger the flow area of the drain hole 13, and the higher the discharge efficiency of the rainwater, mud and the like in the connecting hole 11, but the opening area of the drain hole 13 is too large, which will weaken the structural strength of the knuckle 1 provided with the drain hole 13. Conversely, the smaller the inner diameter of the drain hole 13, the smaller the flow area of the drain hole 13, and the lower the discharge efficiency of the rainwater, mud and the like in the connecting hole 11, but the opening area of the drain hole 13 is small, which has little effect on the structural strength of the knuckle 1 provided with the drain hole 13. Therefore, by controlling the inner diameter of the drain hole 13 to be within the range from 5mm to 8mm, the inner diameter of the drain hole 13 can be prevented from being too small to affect the drainage efficiency, and the inner diameter of the drain hole 13 can be prevented from being too large to affect the structural strength of the knuckle 1, so that the strength of the knuckle 1 can be ensured, and the drainage efficiency of the drain hole 13 can be ensured. The inner diameter of the drain hole 13 can be 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 75mm, 8mm and the like, which is not limited here.

[0060] Next, a vehicle according to the second aspect of the utility model will be described with reference to the accompanying drawings.

[0061] The utility model discloses a vehicle according to the second aspect of the utility model, it is sealed structure 100 to drive.

[0062] According to the vehicle of the second aspect of the utility model, through the first sealing ring 41, good sealing protection effect can be achieved in the area between the steering knuckle 1 and the drive shaft 3 inside the first sealing ring 41, and through the second sealing ring 42, dust, rainwater and the like can be prevented from entering the transmission matching position of the connecting flange 21 and the drive shaft 3, thereby preventing the transmission matching position of the connecting flange 21 and the drive shaft 3 from being polluted and corroded by dust, rainwater and the like, to ensure the reliability of the transmission between the connecting flange 21 and the drive shaft 3.

[0063] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "joint", "fix" and the like terms should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated, can be direct connection, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model in the specific circumstances.

[0064] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of different embodiments or examples without contradiction.

[0065] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A transmission sealing structure, characterized in that: include: a steering knuckle formed with a connecting hole; A hub bearing, comprising a connecting flange and an inner ring and an outer ring that are rotatable relative to each other, wherein the outer ring is arranged in the connecting hole and the connecting flange is arranged on the inner ring; A drive shaft, drivingly connected to the connecting flange; The sealing assembly includes a first sealing ring and a second sealing ring. The first sealing ring is arranged between the steering knuckle and the drive shaft, and the second sealing ring is arranged between the wheel hub bearing and the drive shaft.

2. The transmission sealing structure according to claim 1, characterized in that: The first sealing ring is located on the side of the steering knuckle facing the drive shaft. The first sealing ring is provided on one of the steering knuckle and the drive shaft. The other of the steering knuckle and the drive shaft forms a mating groove open toward the first sealing ring, and the first sealing ring is inserted into the mating groove.

3. The transmission sealing structure according to claim 2, characterized in that: The first sealing ring is spaced apart from the inner wall surface of the matching groove.

4. The transmission sealing structure according to claim 1, characterized in that: The first sealing ring is snap-connected to one of the steering knuckle and the drive shaft.

5. The transmission sealing structure according to claim 4, characterized in that: A plurality of first clamping structures arranged at intervals along the circumferential direction are formed on the inner circumferential surface of the connecting hole, and a plurality of second clamping structures arranged at intervals along the circumferential direction are formed on the first sealing ring. The plurality of first clamping structures are clamped and connected with the plurality of second clamping structures in a one-to-one correspondence.

6. The transmission sealing structure according to claim 1, characterized in that: The second sealing ring is provided on a side of the hub bearing facing the drive shaft. The second sealing ring is provided on one of the hub bearing and the drive shaft and is in interference contact with the other of the hub bearing and the drive shaft.

7. The transmission sealing structure according to claim 6, characterized in that: The second sealing ring is arranged on the inner ring and is in interference contact with the driving shaft.

8. The transmission sealing structure according to claim 1, characterized in that: A drainage hole extending in an up-down direction is formed at the bottom of the inner circumferential surface of the connecting hole. The drainage hole extends to the outer surface of the steering knuckle at one end away from the connecting hole.

9. The transmission sealing structure according to claim 8, characterized in that: In a direction from front to rear, the drainage hole extends obliquely downward.

10. The transmission sealing structure according to claim 9, characterized in that: The included angle a between the extension direction of the drainage hole and the horizontal direction satisfies 30°≤a≤90°.

11. The transmission sealing structure according to claim 8, characterized in that: The inner diameter of the drainage hole ranges from 5-8mm.

12. A vehicle, characterized in that: include: The transmission sealing structure according to any one of claims 1 to 11.

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