Front axle structure and vehicle

Abstract

The application discloses a front axle structure and a vehicle, and belongs to the technical field of automobiles. The front axle structure comprises a wheel hub and a steering knuckle. The steering knuckle is arranged on one side of the wheel hub and comprises a shaft part and an abutting part connected to one end of the shaft part. The shaft part is arranged in the interior of the wheel hub. The end of the wheel hub is provided with an oil seal. An oil seal seat ring is arranged on the shaft part. The oil seal seat ring is tightly arranged with the abutting part and is sealingly matched with the oil seal. An elastic sealing element is further arranged between the oil seal seat ring and the abutting part. The elastic sealing element is filled in the fitting gap between the oil seal seat ring and the abutting part through extrusion deformation, so that the oil seal seat ring and the abutting part are sealed. The application eliminates the gap between the matching surface of the oil seal seat ring and the steering knuckle, ensures the sealing performance of the interior of the wheel hub, effectively prevents the loss or failure of lubricating grease, helps to improve the reliability of the front axle structure and prolongs the service life of the vehicle.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more specifically, to a front axle structure and vehicle. Background Technology

[0002] Currently, truck disc front axle structures typically involve a rigid connection between the wheel hub and the brake disc. The inner and outer bearings of the wheel hub are pressed in before being assembled onto the steering knuckle. A sealed space is formed in the inner cavity of the wheel hub using oil seals, oil seals, steel wheel hub caps, and paper gaskets. Grease is used to lubricate the inner and outer bearings of the wheel hub, thereby ensuring the bearing life and providing a guarantee for the service life of the front axle and the vehicle.

[0003] Since both the oil seal seat ring and the steering knuckle are steel parts, there is a gap between their mating surfaces. When the vehicle is moving at high speed, the bearing rotates at high speed and generates heat, causing the internal gas to expand and the pressure to increase. When the vehicle stops operating, the temperature drops, the internal gas contracts, and the pressure decreases. This alternating pressure change causes grease to seep out from the gap and mud and water to seep in from the inside. This results in a reduction in grease or the grease becoming contaminated with impurities and failing, causing damage to the wheel hub bearing and related malfunctions. Utility Model Content

[0004] This application aims to provide a front axle structure and vehicle, which solves the problems of grease leakage and external mud and water leakage caused by poor sealing inside the front axle wheel hub in the prior art.

[0005] A front axle structure includes: a wheel hub and a steering knuckle;

[0006] The steering knuckle is arranged on one side of the wheel hub. The steering knuckle includes a shaft and an abutment portion connected to one end of the shaft. The shaft passes through the inside of the wheel hub. An oil seal is provided at the end of the wheel hub. An oil seal seat ring is fitted on the shaft. The oil seal seat ring is tightly abutted against the abutment portion. The oil seal seat ring and the oil seal are sealed together.

[0007] An elastic sealing element is also provided between the oil seal seat ring and the abutment portion. The elastic sealing element is filled in the fitting gap between the oil seal seat ring and the abutment portion by compression deformation, so as to seal the oil seal seat ring and the abutment portion.

[0008] Optionally, an annular sealing groove is formed on one end face of the oil seal seat facing the abutment portion; the elastic seal includes a sealing ring, which is embedded in the sealing groove.

[0009] Optionally, the front axle structure further includes a hubcap, which is installed on the side of the hub away from the steering knuckle, and the hubcap is connected to the hub by a first bolt; a gasket is provided between the hubcap and the hub, the gasket including a rigid skeleton layer and an elastic covering layer tightly attached to both sides of the rigid skeleton layer.

[0010] Optionally, the material of the rigid skeleton layer includes metal.

[0011] Optionally, the material of the elastic covering layer includes foam.

[0012] Optionally, the hub cover includes a cover body and a mounting portion disposed on the edge of the cover body; the mounting portion is provided with a mounting hole adapted to the first bolt, and a boss is provided on the outer periphery of the mounting hole, the boss being disposed on the side of the mounting portion away from the hub and protruding from the surface of the mounting portion.

[0013] Optionally, the thickness of the boss protruding from the surface of the mounting part is 1.5mm-2mm.

[0014] Optionally, the hubcap is an injection-molded structure.

[0015] Optionally, the hub is provided with a first bearing and a second bearing. The end of the shaft away from the abutment is connected to the first bearing, and the end of the shaft near the abutment is connected to the second bearing. The oil seal seat is tightly disposed between the second bearing and the abutment.

[0016] Beneficial effects:

[0017] The front axle structure described in this application includes a wheel hub and a steering knuckle. The steering knuckle is arranged on one side of the wheel hub and includes a shaft portion and an abutment portion connected to one end of the shaft portion. The shaft portion passes through the interior of the wheel hub, and an oil seal is provided at the end of the wheel hub. An oil seal seat ring is fitted on the shaft portion, and the oil seal seat ring is tightly abutted against the abutment portion, and the oil seal seat ring and the oil seal are in a sealing fit. An elastic seal is also provided between the oil seal seat ring and the abutment portion. The elastic seal is compressed and deformed to fill the gap between the oil seal seat ring and the abutment portion, thereby sealing the oil seal seat ring and the abutment portion. This application provides an elastic seal between the oil seal seat ring and the abutment portion of the steering knuckle, utilizing the characteristic that the elastic seal can undergo elastic deformation under compression, so that the elastic seal tightly fills the gap between the oil seal seat ring and the abutment portion of the steering knuckle, eliminating the gap between the mating surfaces of the two, thereby ensuring the sealing performance inside the wheel hub, effectively preventing the reduction or failure of lubricating grease, improving the reliability of the front axle structure, and extending the service life of the entire vehicle.

[0018] This application also provides a vehicle that includes the front axle structure described above.

[0019] Because the vehicle has the aforementioned front axle structure, the sealing performance inside the front axle wheel hub is good, which can effectively avoid the problem of grease loss or failure, thus giving it high reliability and service life. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the front axle structure proposed in one embodiment of this application;

[0022] Figure 2 This application Figure 1 A magnified view of a portion of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the oil seal seat ring and sealing ring in the front axle structure proposed in an embodiment of this application;

[0024] Figure 4 This is a top view of the gasket in the front axle structure according to an embodiment of this application;

[0025] Figure 5 This is a cross-sectional view of the gasket in the front axle structure according to an embodiment of this application;

[0026] Figure 6 This application Figure 5 A magnified view of a portion of point B in the middle;

[0027] Figure 7 This is a top view of the hub cover in the front axle structure proposed in one embodiment of this application;

[0028] Figure 8 This is a cross-sectional view of the hub cover in the front axle structure proposed in one embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Wheel hub; 2. Steering knuckle; 21. Shaft; 22. Abutment part; 3. Oil seal; 4. Oil seal seat ring; 5. Elastic seal; 51. Sealing ring; 6. First bearing; 7. Second bearing; 8. Wheel hub cover; 81. Cover body; 82. Mounting part; 83. Mounting hole; 84. Boss; 9. First bolt; 10. Gasket; 101. Rigid skeleton layer; 102. Elastic covering layer; 11. Brake disc; 12. Grease; 13. Second bolt. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In related technologies, the disc front axle structure of trucks is usually a rigid connection between the wheel hub and the brake disc. The inner bearing and outer bearing of the wheel hub are pressed in and then assembled onto the steering knuckle. The oil seal seat ring, oil seal, steel wheel hub cover and paper gasket form a sealed space in the inner cavity of the wheel hub. The inner bearing and outer bearing of the wheel hub are lubricated by grease, thereby ensuring the bearing life and providing a guarantee for the service life of the front axle and the vehicle.

[0033] Currently, the sealing of the inner cavity of the front axle wheel hub in commercial vehicles is mainly achieved through the mating of an oil seal and an oil seal seat ring on the inner side of the wheel hub (i.e., the side where the steering knuckle is installed). Since both the oil seal seat ring and the steering knuckle are steel parts, there are gaps between their mating surfaces. When the vehicle is traveling at high speed, the high-speed rotation of the bearing generates heat, causing the internal gas to expand and the pressure to increase. When the vehicle stops operating, the temperature decreases, the internal gas contracts, and the pressure decreases, creating alternating pressure changes. This leads to grease leakage from the gaps and the infiltration of external mud and water, resulting in reduced grease or grease failure due to impurities. Ultimately, this damages the wheel hub bearing, causing related malfunctions and affecting the reliability of the front axle and the overall lifespan of the vehicle.

[0034] Furthermore, the steel wheel cap is typically bolted to the wheel hub on the outer side (i.e., the side where the wheel cap is installed), with a paper gasket placed between them. The gasket is sealed by the pre-tightening force of the bolts. However, this sealing method suffers from problems. During high-speed vehicle operation, the grease liquefies, causing the paper gasket to absorb a small amount of grease, leading to premature failure. During disassembly and maintenance, the paper gasket is damaged and cannot be reused. Residue remains on the mating surface, requiring grinding and removal, severely affecting the flatness of the mating surface and resulting in poor sealing after reassembly.

[0035] In view of this, this application proposes a front axle structure.

[0036] See Figure 1A front axle structure includes a wheel hub 1 and a steering knuckle 2. The steering knuckle 2 is arranged on one side of the wheel hub 1. The steering knuckle 2 includes a shaft portion 21 and an abutment portion 22 connected to one end of the shaft portion 21. The shaft portion 21 passes through the interior of the wheel hub 1. An oil seal 3 is provided at the end of the wheel hub 1. An oil seal seat ring 4 is fitted on the shaft portion 21. The oil seal seat ring 4 abuts against the abutment portion 22, and the oil seal seat ring 4 and the oil seal 3 are sealed together. An elastic sealing element 5 is also provided between the oil seal seat ring 4 and the abutment portion 22. The elastic sealing element 5 is filled in the fitting gap between the oil seal seat ring 4 and the abutment portion 22 by compression deformation, so as to seal the oil seal seat ring 4 and the abutment portion 22.

[0037] Specifically, the front axle structure includes a wheel hub 1 and a steering knuckle 2, with the steering knuckle 2 located inside the wheel hub 1, i.e. Figure 1 On the right side of the wheel hub 1 shown, the steering knuckle 2 includes a shaft portion 21 and an abutment portion 22. The shaft portion 21 extends into the inner cavity of the wheel hub 1 and is rotatably connected to the wheel hub 1 coaxially. The abutment portion 22 is located at the right end of the shaft portion 21. An oil seal seat ring 4 is fitted onto the shaft portion 21, and the right end of the oil seal seat ring 4 is tightly abutted against the left end of the abutment portion 22. An oil seal 3 is fixed at the right end of the wheel hub 1 by a gear ring for sealing engagement with the oil seal seat ring 4. An elastic seal 5 is also provided between the oil seal seat 4 and the abutment part 22. The elastic seal 5 is elastic. When the oil seal seat 4 and the abutment part 22 are pressed together, the elastic seal 5 is squeezed and deformed, thus tightly filling the gap between the oil seal seat 4 and the abutment part 22. This eliminates the gap between the oil seal seat 4 and the steering knuckle 2, effectively preventing the grease 12 inside the wheel hub 1 from overflowing from the gap and external mud and water impurities from entering the wheel hub 1 from the gap. This ensures the sealing performance of the wheel hub 1 and helps to improve the reliability of the front axle wheel end and the service life of the whole vehicle.

[0038] Optionally, the hub 1 is provided with a first bearing 6 and a second bearing 7. The end of the shaft portion 21 away from the abutment portion 22 is connected to the first bearing 6, and the end of the shaft portion 21 close to the abutment portion 22 is connected to the second bearing 7. The oil seal seat ring 4 is tightly disposed between the second bearing 7 and the abutment portion 22.

[0039] Specifically, such as Figure 1 As shown, the front axle structure also includes a brake disc 11, which is connected to the wheel hub 1 by a second bolt 13. A first bearing 6 and a second bearing 7 are disposed inside the wheel hub 1, with the first bearing 6 located near the outer side of the wheel hub 1 and the second bearing 7 located near the inner side of the wheel hub 1. The shaft portion 21 of the steering knuckle 2 is press-fitted into the wheel hub 1, with the end of the shaft portion 21 furthest from the abutment portion 22... Figure 1The left end of the shaft portion 21 shown is installed into the first bearing 6, and the end of the shaft portion 21 near the abutment portion 22 is also... Figure 1 The right end of the shaft portion 21 shown is installed into the second bearing 7. After installation, the oil seal seat 4, which is sleeved on the shaft portion 21 of the steering knuckle 2, is pressed between the second bearing 7 and the abutment portion 22. The left end of the oil seal seat 4 presses against the second bearing 7, and the right end of the oil seal seat 4 presses against the abutment portion 22 of the steering knuckle 2.

[0040] Optionally, the oil seal seat ring 4 has an annular sealing groove on one end face facing the abutment portion 22; the elastic seal 5 includes a sealing ring 51, which is embedded in the sealing groove.

[0041] Specifically, in this embodiment, the elastic seal 5 adopts an O-ring seal 51, see [link to documentation]. Figure 2 and Figure 3 The oil seal seat 4 is tightly abutted between the second bearing 7 and the abutment portion 22 of the steering knuckle 2. Specifically, the left end of the oil seal seat 4 abuts against the second bearing 7, and the right end of the oil seal seat 4 abuts against the abutment portion 22 of the steering knuckle 2. An annular sealing groove is provided on the right end face of the oil seal seat 4, and an O-ring seal 51 is embedded in the annular sealing groove. When the oil seal seat 4 abuts against the abutment portion 22 of the steering knuckle 2, the O-ring seal 51 is subjected to compression and undergoes circumferential deformation. The circumferential deformation of the seal 51 fills the fitting gap between the oil seal seat 4 and the abutment portion 22, thereby eliminating the mating surface gap between the oil seal seat 4 and the steering knuckle 2, effectively inhibiting the leakage of liquid grease 12 inside the wheel hub 1 and the entry of external mud and water into the inner cavity of the wheel hub 1.

[0042] In other embodiments, the elastic seal 5 can also be a sealing strip, a sealing gasket, etc., and its specific shape can be adjusted according to the shape of the mating surface. The elastic seal 5 can be made of rubber, and its quantity can be set to one or more according to the size of the mating surface.

[0043] Optionally, the front axle structure further includes a hubcap 8, which is installed on the side of the wheel hub 1 away from the steering knuckle 2, and the hubcap 8 is connected to the wheel hub 1 by a first bolt 9; a gasket 10 is provided between the hubcap 8 and the wheel hub 1, and the gasket 10 includes a rigid skeleton layer 101 and an elastic covering layer 102 that is tightly attached to both sides of the rigid skeleton layer 101.

[0044] Specifically, the front axle structure also includes a hubcap 8, which is located on the outside of the hub 1, i.e. Figure 1The wheel hub 1 shown is located on the left side, away from the steering knuckle 2. The wheel hub cover 8 is installed and fixed to the wheel hub 1 by the first bolt 9. A gasket 10 is provided between the wheel hub cover 8 and the wheel hub 1. During installation, the first bolt 9 passes through the wheel hub cover 8 and the gasket 10 in sequence and then engages with the threaded hole in the wheel hub 1 to achieve connection and fixation.

[0045] Figure 4 The figure shown is a top view of the structure of a gasket 10 provided in this embodiment. In practical applications, the overall shape of the gasket 10 can be designed according to the shape of the mating surface. The gasket 10 is provided with a through hole adapted to the passage of the first bolt 9.

[0046] See Figure 5 and Figure 6 In this embodiment, the gasket 10 adopts a multi-layer structure, including a rigid skeleton layer 101 in the middle and elastic covering layers 102 on both sides of the rigid skeleton layer 101. The rigid skeleton layer 101 is used to provide strength support for the structure of the gasket 10, which helps to increase the durability of the gasket 10, reduce damage during use, and reduce maintenance costs. The elastic covering layers 102 are tightly attached to both sides of the outer surface of the rigid skeleton layer 101. When the first bolt 9 is used for connection, the outer elastic covering layers 102 contact the mating surfaces of the hub cap 8 and the hub 1 respectively, which can provide additional preload to prevent the bolt from loosening. At the same time, the elastic deformation can also achieve sealing at the connection.

[0047] Compared to the paper gaskets used in conventional front axle structures, the gasket 10 provided in this embodiment has higher structural strength, better sealing performance, will not have its structural integrity damaged by the grease 12, can be reused, and does not require grinding of the mating surfaces, thus improving the connection stability and reliability between the hub cap 8 and the hub 1.

[0048] Optionally, the rigid skeleton layer 101 may be made of metal.

[0049] Specifically, the rigid skeleton layer 101 can be made of a metal material with good rigidity, such as steel, aluminum alloy, titanium alloy, etc., which has the characteristics of high strength, corrosion resistance and wear resistance, and can provide good strength support for the gasket 10 and increase the durability of the gasket 10.

[0050] Optionally, the material of the elastic covering layer 102 includes foam.

[0051] Specifically, the elastic covering layer 102 can be made of foamed adhesive materials, such as polyurethane, acrylic, polyester resin, styrene-butadiene rubber, etc. Through the foaming process of the adhesive, an elastic covering layer 102 with a certain thickness is formed on both sides of the rigid skeleton layer 101. When the first bolt 9 is used for fixing, the elastic covering layer 102 can provide additional preload, and at the same time, the connection can be sealed through elastic deformation.

[0052] In practical applications, the thickness of the rigid skeleton layer 101 and the elastic covering layer 102 can be reasonably set as needed. As an optional implementation, the thickness of the rigid skeleton layer 101 can be set to 0.5mm-1mm, and the thickness of the elastic covering layers 102 on both sides can be set to 0.5mm respectively.

[0053] Optionally, the hub cover 8 includes a cover body 81 and a mounting portion 82 disposed on the edge of the cover body 81; the mounting portion 82 is provided with a mounting hole 83 adapted to the first bolt 9, and a boss 84 is provided on the outer periphery of the mounting hole 83, the boss 84 is disposed on the side of the mounting portion 82 away from the hub 1 and protrudes from the surface of the mounting portion 82.

[0054] Specifically, Figure 7 The image shown is a top view of a hubcap 8 provided in this embodiment. In practical applications, the overall shape of the hubcap 8 can be designed based on the shape of the mating surfaces. The hubcap 8 includes a cover body 81 and a mounting portion 82. The mounting portion 82 is located at the edge of the cover body 81 and serves as the connection point with the hub 1 during assembly. A mounting hole 83 is provided on the mounting portion 82 for the first bolt 9 to pass through. A ring-shaped boss 84 is provided around the outer periphery of the mounting hole 83. Figure 8 As shown, the boss 84 is located on the outer side of the hubcap 8, that is, on the side of the mounting portion 82 opposite to the hub 1, protruding from the outer surface of the mounting portion 82. During installation, the inner surface of the mounting portion 82 of the hubcap 8 contacts the gasket 10 and is pressed against the left end mating surface of the hub 1. The first bolt 9 passes through the mounting hole 83 on the mounting portion 82 and the through hole on the gasket 10 in sequence, and is threaded into the threaded hole on the hub 1. After tightening, the head of the first bolt 9 abuts against the boss 84 on the mounting portion 82. By setting the boss 84, the thickness of the hubcap 8 at the mounting hole 83 is increased, which helps to increase the connection rigidity and improve the reliability of the connection.

[0055] Optionally, the thickness of the boss 84 protruding from the surface of the mounting portion 82 is 1.5mm-2mm.

[0056] Specifically, the thickness of the protrusion 84 can be reasonably set according to the thickness of the cover body 81 of the hub cover 8. As an optional implementation, the thickness of the protrusion 84 protruding from the surface of the mounting part 82 can be set to 1.5mm-2mm. For example, for a hub cover 8 with a cover body 81 thickness of 4mm-4.5mm, the overall thickness of the protrusion 84 and the mounting part 82 can be set to 6mm.

[0057] Optionally, the hub cap 8 is an injection-molded structure.

[0058] Specifically, to further reduce the weight of the wheel hub cover 8, in this embodiment, the wheel hub cover 8 is preferably made of plastic and manufactured by injection molding. Compared with the steel wheel hub cover used in conventional front axle structures, it is lighter. Even with the addition of the boss 84 for local thickening, its weight is still 0.15 kg lighter than that of conventional steel wheel hub covers, which can meet the requirements of lightweight design and help reduce the overall vehicle weight.

[0059] In the front axle structure provided in this application embodiment, during assembly, the sealing ring 51 is first embedded into the sealing groove of the oil seal seat ring 4, and then pressed onto the shaft portion 21 of the steering knuckle 2 using a tooling. Then, the wheel hub 1 and the brake disc 11 are rigidly connected using the second bolt 13. The first bearing 6 and the second bearing 7 are pressed into the inside of the wheel hub 1, and after being assembled into a wheel hub disc assembly, it is then assembled onto the steering knuckle 2. During the clearance adjustment of the first bearing 6 and the second bearing 7, the wheel hub disc assembly presses the oil seal seat ring 4, and the oil seal seat ring 4 is pressed between the second bearing 7 and the abutment portion 22 of the steering knuckle 2, so that the sealing ring 51 is squeezed and deformed, thereby tightly filling the gap between the contact surface of the oil seal seat ring 4 and the steering knuckle 2. After the bearing is tightened in place, the wheel hub cover 8 and the gasket 10 are connected to the outer mounting surface of the wheel hub 1 using the first bolt 9, and tightened to the specified torque.

[0060] The front axle structure provided in this application embodiment includes an elastic seal 5 on the inner side of the wheel hub 1, between the oil seal seat 4 and the abutment portion 22 of the steering knuckle 2. Utilizing the elastic deformation characteristic of the elastic seal 5 under compression, it tightly fills the gap between the oil seal seat 4 and the abutment portion 22 of the steering knuckle 2, eliminating the gap between their mating surfaces and ensuring the sealing performance inside the wheel hub 1, effectively preventing the reduction or failure of the lubricating grease 12. Furthermore, on the outer side of the wheel hub 1, a gasket 10 is provided between the wheel hub cover 8 and the wheel hub 1. The gasket 10 includes a rigid skeleton layer 101 and elastic covering layers 102 tightly fitted to both sides of the rigid skeleton layer 101. This ensures the strength of the gasket 10 structure, improves the sealing performance at the connection, and allows for reuse, further improving the reliability of the front axle structure and extending the overall vehicle lifespan.

[0061] This application also provides a vehicle, which includes the front axle structure described above.

[0062] Because the vehicle has the aforementioned front axle structure, the sealing performance inside the front axle wheel hub 1 is good, which can effectively avoid the problem of missing or ineffective grease 12, thus giving it high reliability and service life.

[0063] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0065] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A front axle structure, characterized in that, include: Wheel hub (1) and steering knuckle (2); The steering knuckle (2) is arranged on one side of the hub (1). The steering knuckle (2) includes a shaft (21) and an abutment (22) connected to one end of the shaft (21). The shaft (21) passes through the interior of the hub (1). An oil seal (3) is provided at the end of the hub (1). An oil seal seat (4) is fitted on the shaft (21). The oil seal seat (4) is abutted against the abutment (22). The oil seal seat (4) and the oil seal (3) are sealed together. An elastic sealing element (5) is also provided between the oil seal seat (4) and the abutment part (22). The elastic sealing element (5) is filled in the fitting gap between the oil seal seat (4) and the abutment part (22) by compression deformation, so as to seal the oil seal seat (4) and the abutment part (22).

2. The front axle structure according to claim 1, characterized in that: The oil seal seat ring (4) has an annular sealing groove on one end face facing the abutment part (22); the elastic seal (5) includes a sealing ring (51), which is embedded in the sealing groove.

3. The front axle structure according to claim 1, characterized in that: It also includes a hub cap (8), which is installed on the side of the hub (1) away from the steering knuckle (2), and the hub cap (8) is connected to the hub (1) by a first bolt (9); A gasket (10) is provided between the hub cap (8) and the hub (1). The gasket (10) includes a rigid skeleton layer (101) and an elastic covering layer (102) that is tightly attached to both sides of the rigid skeleton layer (101).

4. The front axle structure according to claim 3, characterized in that: The material of the rigid skeleton layer (101) includes metal.

5. The front axle structure according to claim 3, characterized in that: The material of the elastic covering layer (102) includes foam.

6. The front axle structure according to claim 3, characterized in that: The hub cover (8) includes a cover body (81) and a mounting portion (82) disposed on the edge of the cover body (81). The mounting part (82) is provided with a mounting hole (83) that is adapted to the first bolt (9). A boss (84) is provided on the outer periphery of the mounting hole (83). The boss (84) is located on the side of the mounting part (82) away from the hub (1) and protrudes from the surface of the mounting part (82).

7. The front axle structure according to claim 6, characterized in that: The thickness of the boss (84) protruding from the surface of the mounting part (82) is 1.5mm-2mm.

8. The front axle structure according to claim 3, characterized in that: The hub cap (8) is an injection-molded structure.

9. The front axle structure according to claim 1, characterized in that: The hub (1) is provided with a first bearing (6) and a second bearing (7). The end of the shaft (21) away from the abutment (22) is connected to the first bearing (6), and the end of the shaft (21) close to the abutment (22) is connected to the second bearing (7). The oil seal seat (4) is tightly disposed between the second bearing (7) and the abutment (22).

10. A vehicle, characterized in that, Includes the front axle structure as described in any one of claims 1-9.

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