Front axle assembly for vehicle, axle assembly and vehicle
By incorporating multiple first bearings in the front axle assembly and improving preload control, the issues of insufficient reliability and maintenance-free mileage were resolved, resulting in higher component reliability and autonomous driving performance.
Patent Information
- Application Number
- CN202423272287.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The existing front axle components have poor reliability and low maintenance-free mileage, making it difficult to meet the performance requirements of autonomous driving technology.
By setting multiple first bearings all fitted onto the mounting shaft, with any two adjacent first bearings abutting each other, the preload control method is improved, the accuracy of preload control is enhanced, and the bearing clearance is made negative, thereby improving bearing life and component reliability.
It improves the reliability and maintenance-free range of the front axle components, extending the maintenance-free range to 800,000 kilometers, reduces rotational resistance and failure risk, and enhances the control precision and response speed of autonomous driving.
Smart Images
Figure CN223590476U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vehicle technical field especially is related to a front axle assembly for vehicle, axle assembly with the front axle assembly and vehicle with the axle assembly. BACKGROUND
[0002] In the related art, the front axle assembly is a whole vehicle primary component, which has the functions of steering, braking and bearing. However, the reliability of the front axle assembly is poor, and the maintenance-free mileage is low, which cannot meet the performance requirements of the front axle assembly for automatic driving technology. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide a front axle assembly to improve the accuracy of first bearing pre-tightening force control, thereby improving the reliability and maintenance-free mileage of the front axle assembly.
[0004] The front axle assembly according to the utility model embodiment comprises: a steering knuckle, the steering knuckle has a mounting shaft and a steering knuckle body, the mounting shaft is located on one side of the steering knuckle body and fixedly connected with the steering knuckle body; a hub and a plurality of first bearings, the plurality of first bearings are all sleeved on the mounting shaft and arranged in sequence along the axial direction of the mounting shaft, the hub is sleeved on the plurality of first bearings so that the hub is rotatably arranged on the mounting shaft, and any two adjacent first bearings abut, along the axial direction of the mounting shaft, the first bearing facing the steering knuckle body abuts against the steering knuckle body.
[0005] The front axle assembly according to the utility model embodiment, by setting that the plurality of first bearings are all sleeved on the mounting shaft and any two adjacent first bearings abut, the control mode of the first bearing pre-tightening force can be improved, which is conducive to improving the accuracy of the first bearing pre-tightening force control, thereby improving the reliability of the front axle assembly, and the first bearing play can be negative, so as to improve the service life of the first bearing, thereby improving the maintenance-free mileage of the front axle assembly.
[0006] In some embodiments of the utility model, the plurality of first bearing structures are the same.
[0007] In some embodiments of the utility model, the hub is formed with a first mounting hole, the mounting shaft is arranged in the first mounting hole, and the plurality of first bearings are all assembled in the first mounting hole.
[0008] In some embodiments of the utility model, each first bearing comprises: a bearing inner ring and a plurality of rollers, the bearing inner ring is sleeved on the mounting shaft, a surface of the bearing inner ring away from the mounting shaft is formed with a plurality of first rolling grooves, the plurality of first rolling grooves are arranged along the circumferential direction of the bearing inner ring, an inner wall of the first mounting hole is formed with a plurality of second rolling grooves, the plurality of second rolling grooves correspond to the plurality of first rolling grooves one by one, and the rollers are assembled in the corresponding first rolling grooves and second rolling grooves.
[0009] In some embodiments of the utility model, the surface roughness of the roller is Ra1, the inner wall surface roughness of the first rolling groove is Ra2, and the inner wall surface roughness of the second rolling groove is Ra3, and the following relationships are met: 0.01 μm≤Ra1≤0.125 μm, 0.01 μm≤Ra2≤0.125 μm, and 0.01 μm≤Ra3≤0.125 μm.
[0010] In some embodiments of the utility model, the first oil seal and the second oil seal, the first oil seal is assembled between the first bearing and the hub at one end to seal the gap between the corresponding first bearing and the hub, and the second oil seal is assembled between the first bearing and the hub at the other end to seal the gap between the corresponding first bearing and the hub.
[0011] In some embodiments of the utility model, the front axle assembly further comprises a connecting shaft and a knuckle pin, the knuckle body is formed with a first fork and a second fork on the side away from the mounting shaft, the first fork and the second fork are opposite and spaced apart, the knuckle pin is assembled in the first fork and the second fork, and the connecting shaft is mounted on the knuckle pin to movably connect the connecting shaft and the knuckle.
[0012] In some embodiments of the utility model, the first fork is provided with a tapered roller bearing, and the knuckle pin is arranged in the tapered roller bearing.
[0013] In some embodiments of the utility model, the second fork is provided with a joint bearing, and the knuckle pin is arranged in the joint bearing.
[0014] The axle assembly according to the embodiments of the utility model comprises the front axle assembly for the vehicle according to the above embodiments.
[0015] The vehicle according to the embodiments of the utility model comprises the axle assembly according to the above embodiments.
[0016] Additional aspects and advantages of the utility model will be in part apparent and in part pointed out hereinafter in the description of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0017] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:
[0018] Figure 1 is a sectional view of the front axle assembly according to the embodiments of the utility model;
[0019] Figure 2 is a relationship diagram of the first bearing life and the clearance according to the embodiments of the utility model.
[0020] REFERENCE NUMERALS:
[0021] front axle assembly 100;
[0022] knuckle 1; mounting shaft 11; knuckle body 12;
[0023] first fork portion 121; second fork portion 122; tapered roller bearing 123; joint bearing 124; first assembly hole 125; second assembly hole 126;
[0024] wheel hub 2; first mounting hole 21; second raceway 211; wheel hub cover 22;
[0025] first bearing 3; bearing inner ring 31; first raceway 311; roller 32; rib 33;
[0026] first oil seal 4;
[0027] second oil seal 5;
[0028] connecting shaft 6;
[0029] knuckle pin 7; knuckle pin nut 71; cover 72;
[0030] third oil seal 8;
[0031] fourth oil seal 9. DETAILED DESCRIPTION
[0032] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and should not be understood as a limitation of the present application.
[0033] The following refers to Figure 1 The front axle assembly 100 according to the embodiments of the present application is described below, which can be applied to vehicles such as passenger cars and commercial vehicles.
[0034] As Figure 1 shown, the front axle assembly 100 according to the embodiments of the present application includes: a knuckle 1 having a mounting shaft 11 and a knuckle body 12, the mounting shaft 11 being located at one side of the knuckle body 12 and fixedly connected with the knuckle body 12; a wheel hub 2 and a plurality of first bearings 3, the plurality of first bearings 3 being sleeved on the mounting shaft 11 and arranged in sequence along the axial direction of the mounting shaft 11, the wheel hub 2 being sleeved on the plurality of first bearings 3 so that the wheel hub 2 is rotatably arranged on the mounting shaft 11, and any two adjacent first bearings 3 abut, along the axial direction of the mounting shaft 11, the first bearing 3 facing the knuckle body 12 abutting against the knuckle body 12.
[0035] Wherein, along the axial direction of the mounting shaft 11, the mounting shaft 11 is located on one side of the knuckle body 12. As some embodiments of the present application, the mounting shaft 11 and the knuckle body 12 are integrally formed. As some embodiments of the present application, the mounting shaft 11 and the knuckle body 12 are welded to improve the connection reliability of the mounting shaft 11 and the knuckle body 12, and reduce the risk of stress cracking at the connection of the mounting shaft 11 and the knuckle body 12, thereby improving the structural reliability and service life of the knuckle 1.
[0036] The first bearing 3 can be provided in multiple numbers, for example: the first bearing 3 can be provided in two, three or more, and the present application takes the first bearing 3 provided in two as an example for illustration, which can reasonably set the number of the first bearing 3 and reduce the risk of increasing the production cost of the front axle assembly 100 due to excessive number of the first bearing 3. The mounting shaft 11 is sequentially arranged in the inner ring of the plurality of first bearings 3, so that the plurality of first bearings 3 are sleeved on the mounting shaft 11. Along the axial direction of the mounting shaft 11, the plurality of first bearings 3 are sequentially arranged, and the hub 2 is sleeved on the plurality of first bearings 3, so that the hub 2 is rotatably arranged on the mounting shaft 11, thereby realizing the effect of normal driving of the vehicle.
[0037] Any two adjacent first bearings 3 abut, for example: the inner ring length of the first bearing 3 can be extended, so that the inner rings of any two adjacent first bearings 3 abut, and among the plurality of first bearings 3 sequentially arranged along the axial direction of the mounting shaft 11, the first bearing 3 close to the knuckle body 12 abuts against the knuckle body 12, thereby improving the assembly stability of the first bearing 3. By abutting any two adjacent first bearings 3, the control method of the pre-tightening force of the first bearing 3 can be improved, for example: the pre-tightening force of the bearing is controlled at or about 600N·m, and this pre-tightening force state is maintained by the locking mechanism, thereby improving the control accuracy of the pre-tightening force of the first bearing 3, and further improving the reliability, product consistency and assembly consistency of the front axle assembly 100.
[0038] Improving the control accuracy of the pre-tightening force of the first bearing 3 can also improve the control accuracy of the first bearing 3 play, so that the first bearing 3 play is negative. It can be understood that, as shown in the figure, Figure 2 The greater the first bearing 3 play, the shorter the service life. When the first bearing 3 play is slightly negative, the first bearing 3 has the highest service life. Therefore, the first bearing 3 play is negative, which can improve the service life of the first bearing 3, thereby improving the maintenance-free mileage of the front axle assembly 100, for example: the service life of the first bearing 3 is improved to 3*L10 (L10 is the basic rated life), and the maintenance-free mileage is improved to 80*10 4 km.
[0039] Specifically, the mounting shaft 11 is sequentially threaded through the inner rings of the plurality of first bearings 3, so that the plurality of first bearings 3 are sleeved on the mounting shaft 11 and sequentially arranged along the axial direction of the mounting shaft 11. The hub 2 is sleeved on the plurality of first bearings 3 and locked by bolts, so that the hub 2 is rotatably arranged on the mounting shaft 11, achieving the effect of normal driving of the vehicle. Any two adjacent first bearings 3 abut, and the first bearing 3 close to the knuckle body 12 abuts against the knuckle body 12 along the axial direction of the mounting shaft 11.
[0040] Therefore, by arranging the plurality of first bearings 3 to be sleeved on the mounting shaft 11 and any two adjacent first bearings 3 to abut, the control mode of the first bearing 3 pre-tightening force can be improved, which is beneficial to improve the accuracy of the first bearing 3 pre-tightening force control, thereby improving the reliability of the front axle assembly 100, and the first bearing 3 backlash can be negative, thereby improving the service life of the first bearing 3, thereby improving the maintenance-free mileage of the front axle assembly 100.
[0041] In some embodiments of the present application, as shown in Figure 1 The plurality of first bearings 3 are structurally identical.
[0042] The plurality of first bearings 3 are structurally identical, which can reduce the difficulty of maintenance and repair of the front axle assembly 100. Moreover, the plurality of first bearings 3 are structurally identical, which can increase the performance consistency of the plurality of first bearings 3. Since the plurality of first bearings 3 jointly support the rotation of the hub 2, the plurality of first bearings 3 are structurally identical, which can make the key parameters such as the load-carrying capacity of the plurality of first bearings 3 be identical or approximately identical, which is beneficial to the optimal design of the front axle assembly 100, reduces the risk of imbalance or failure of the front axle assembly 100 caused by performance differences of the first bearings 3, and thereby improves the stability and reliability of the front axle assembly 100.
[0043] In some embodiments of the present application, as shown in Figure 1 The hub 2 is formed with a first mounting hole 21, the mounting shaft 11 is threaded through the first mounting hole 21, and the plurality of first bearings 3 are assembled in the first mounting hole 21.
[0044] The first mounting hole 21 is formed at the center position of the hub 2 to enable the hub 2 to rotate stably. The mounting shaft 11 is threaded through the first mounting hole 21, and the plurality of first bearings 3 are assembled in the first mounting hole 21, for example, the inner rings of the plurality of first bearings 3 are assembled on the mounting shaft 11, and the mounting shaft 11 and the plurality of first bearings 3 sleeved on the mounting shaft 11 are assembled in the first mounting hole 21, so that the plurality of first bearings 3 are clamped between the mounting shaft 11 and the hub 2. Since the rolling elements of the first bearings 3 can rotate, the effect of rotating the hub 2 relative to the mounting shaft 11 can be achieved, thereby achieving the effect of normal driving of the vehicle.
[0045] In some embodiments of the present application, as shown inFigure 1 As shown in the figure, each first bearing 3 can include: a bearing inner ring 31 and a plurality of rollers 32, the bearing inner ring 31 is sleeved on the mounting shaft 11, a surface of the bearing inner ring 31 away from the mounting shaft 11 is formed with a plurality of first rolling grooves 311, the plurality of first rolling grooves 311 are arranged along the circumference of the bearing inner ring 31, the inner wall of the first mounting hole 21 is formed with a plurality of second rolling grooves 211, the plurality of second rolling grooves 211 correspond to the plurality of first rolling grooves 311 one by one, and the roller 32 is assembled in the corresponding first rolling groove 311 and second rolling groove 211.
[0046] The bearing inner ring 31 is the inner ring in the above embodiment, and the roller 32 is the rolling body in the above embodiment, each first bearing 3 can include a plurality of rollers 32, for example, the roller 32 can be provided with ten, twelve or more, as long as the roller 32 can be uniformly arranged along the circumference of the bearing inner ring 31, so that the stability of the rotation of the hub 2 is realized. The mounting shaft 11 is arranged in the bearing inner ring 31, so that the first bearing 3 is sleeved on the mounting shaft 11. A surface of the bearing inner ring 31 away from the mounting shaft 11 is formed with a plurality of first rolling grooves 311, for example, the first rolling groove 311 can be provided with ten, twelve or more. The plurality of first rolling grooves 311 are arranged along the circumference of the bearing inner ring 31.
[0047] The inner wall of the first mounting hole 21 is formed with a plurality of second rolling grooves 211, for example, the second rolling groove 211 can be provided with ten, twelve or more. The plurality of second rolling grooves 211 correspond to the plurality of first rolling grooves 311 one by one, that is, one second rolling groove 211 corresponds to one first rolling groove 311, further, the number of rollers 32, the number of first rolling grooves 311 and the number of second rolling grooves 211 are equal, so that any roller 32 can be smoothly assembled in the corresponding first rolling groove 311 and second rolling groove 211, thereby further realizing the rotation effect of the hub 2 relative to the mounting shaft 11. By canceling the conventional bearing outer ring, the plurality of rollers 32 are directly assembled with the hub 2, so that the assembly error can be reduced, and the reliability of the front axle assembly 100 is further improved.
[0048] In some embodiments of the utility model, as shown in the figure, Figure 1 As shown in the figure, the surface roughness of the roller 32 is Ra1, the inner wall surface roughness of the first rolling groove 311 is Ra2, and the inner wall surface roughness of the second rolling groove 211 is Ra3, which satisfy the relationship: 0.01 μm≤Ra1≤0.125 μm, 0.01 μm≤Ra2≤0.125 μm, 0.01 μm≤Ra3≤0.125 μm.
[0049] The surface roughness Ra1 of the roller 32, the inner wall surface roughness Ra2 of the first rolling groove 311 and the inner wall surface roughness Ra3 of the second rolling groove 211 can be any value between 0.01 μm and 0.125 μm, for example, Ra1, Ra2 and Ra3 can be 0.01 μm, 0.12 μm or 0.125 μm, or other values between 0.01 μm and 0.125 μm. Further, among the plurality of first bearings 3 arranged along the axial direction of the mounting shaft 11, the bearing inner rings 31 of the first bearings 3 at both ends are provided with a baffle 33 at one end away from each other, and the surface roughness of the baffle 33 is Ra4, which satisfies the relationship: 0.01 μm≤Ra1≤0.12 μm, that is, the surface roughness Ra4 of the baffle 33 can be any value between 0.01 μm and 0.12 μm, for example, Ra4 can be 0.01 μm, 0.08 μm or 0.12 μm, or other values between 0.01 μm and 0.12 μm.
[0050] The surface roughness Ra1 of the roller 32, the inner wall surface roughness Ra2 of the first rolling groove 311 and the inner wall surface roughness Ra3 of the second rolling groove 211 can be any value between 0.01 μm and 0.125 μm, for example, Ra1, Ra2 and Ra3 can be 0.01 μm, 0.12 μm or 0.125 μm, or other values between 0.01 μm and 0.125 μm. Further, among the plurality of first bearings 3 arranged along the axial direction of the mounting shaft 11, the bearing inner rings 31 of the first bearings 3 at both ends are provided with a baffle 33 at one end away from each other, and the surface roughness of the baffle 33 is Ra4, which satisfies the relationship: 0.01 μm≤Ra1≤0.12 μm, that is, the surface roughness Ra4 of the baffle 33 can be any value between 0.01 μm and 0.12 μm, for example, Ra4 can be 0.01 μm, 0.08 μm or 0.12 μm, or other values between 0.01 μm and 0.12 μm.
[0051]
[0052] Table 1
[0053] In some embodiments of the utility model, as shown in Figure 1 The first oil seal 4 and the second oil seal 5, the first oil seal 4 is assembled between the first bearing 3 at one end and the hub 2 to seal the gap between the corresponding first bearing 3 and the hub 2, and the second oil seal 5 is assembled between the first bearing 3 at the other end and the hub 2 to seal the gap between the corresponding first bearing 3 and the hub 2.
[0054] Among the plurality of first bearings 3 arranged along the axial direction of the mounting shaft 11, two first bearings 3 located at both ends, the first oil seal 4 is assembled between the first bearing 3 at one end and the hub 2, so that the first oil seal 4 seals the gap between the corresponding first bearing 3 and the hub 2, reduces the risk of dust, water vapor entering the front axle assembly 100 from the gap between the corresponding first bearing 3 and the hub 2. The second oil seal 5 is assembled between the first bearing 3 at the other end and the hub 2, so that the second oil seal 5 seals the gap between the corresponding first bearing 3 and the hub 2, reduces the risk of dust, water vapor entering the front axle assembly 100 from the gap between the corresponding first bearing 3 and the hub 2. By setting the first oil seal 4 and the second oil seal 5 to seal the gap between the hub 2 and the corresponding first bearing 3, the dustproof and oil leakage performance of the front axle assembly 100 can be improved, and the waterproof performance of the front axle assembly 100 can be improved, for example: the waterproof grade is improved to IP67, thereby effectively reducing the risk of water failure of the first bearing 3, and improving the working reliability and service life of the front axle assembly 100.
[0055] It can be understood that, as shown in Figure 1 The hub 2 can be provided with a hub cover 22, which can limit the first bearing 3 and reduce the risk of the first bearing 3 falling off from between the mounting shaft 11 and the hub 2, thereby further improving the working reliability of the front axle assembly 100.
[0056] In some embodiments of the present application, as shown in Figure 1 The front axle assembly 100 can further include a connecting shaft 6 and a knuckle pin 7, the knuckle body 12 is formed with a first fork portion 121 and a second fork portion 122 on the side away from the mounting shaft 11, the first fork portion 121 and the second fork portion 122 are opposite and spaced apart, the knuckle pin 7 is assembled to the first fork portion 121 and the second fork portion 122, and the connecting shaft 6 is installed on the knuckle pin 7 to make the connecting shaft 6 and the knuckle 1 movably connected.
[0057] The knuckle body 12 is formed with a first fork portion 121 and a second fork portion 122, the first fork portion 121 and the second fork portion 122 are formed on the side of the knuckle body 12 away from the mounting shaft 11, so that the positions of the first fork portion 121 and the second fork portion 122 are reasonably arranged, so that the knuckle pin 7 can be smoothly assembled to the first fork portion 121 and the second fork portion 122. The first fork portion 121 and the second fork portion 122 are arranged opposite and spaced apart, the knuckle pin 7 is assembled to the first fork portion 121 and the second fork portion 122, for example: the first fork portion 121 is formed with a first assembly hole 125, the second fork portion 122 can be formed with a second assembly hole 126, the knuckle pin 7 is sequentially arranged in the first assembly hole 125 and the second assembly hole 126, so that the knuckle pin 7 is assembled to the first fork portion 121 and the second fork portion 122, thereby realizing the effect of smoothly assembling the knuckle pin 7 and the knuckle 1.
[0058] The connecting shaft 6 is mounted on the knuckle pin 7 and locked by a knuckle pin nut 71, so that the connecting shaft 6 is movably connected with the knuckle pin 7 and the knuckle 1, thereby enabling the knuckle 1 to deflect by a certain angle around the knuckle pin 7. When the driver turns the steering wheel, the steering mechanism transmits the steering force to the knuckle 1 through components such as steering tie rods, so that the knuckle 1 swings relative to the knuckle pin 7. Since the wheel hub 2 is mounted on the mounting shaft 11 of the knuckle 1, the wheel hub 2 swings with the knuckle 1, thereby achieving the effect of smooth and accurate steering of the wheel hub 2.
[0059] The front axle assembly 100 can further include a cover 72, which can be provided in multiple, and when the knuckle pin 7 is assembled, the cover 72 can be respectively covered on the first assembly hole 125 and the second assembly hole 126, and is connected with the knuckle 1 in a clamping manner, so as to seal the first assembly hole 125 and the second assembly hole 126, thereby further improving the dustproof and waterproof effects of the knuckle pin 7, and improving the working stability of the knuckle pin 7.
[0060] In some embodiments of the utility model, as shown in Figure 1 The first fork part 121 is provided with a tapered roller bearing 123, and the knuckle pin 7 penetrates the tapered roller bearing 123.
[0061] The first fork part 121 is provided with a first assembly hole 125, the knuckle pin 7 penetrates the first assembly hole 125, and the tapered roller bearing 123 is assembled in the first assembly hole 125, for example, the knuckle pin 7 penetrates the inner ring of the tapered roller bearing 123, and the tapered roller bearing 123 is assembled in the first assembly hole 125, so that the tapered roller bearing 123 and the knuckle pin 7 are both assembled in the first fork part 121, and the tapered roller bearing 123 is clamped between the knuckle pin 7 and the first fork part 121. By arranging the tapered roller bearing 123 between the knuckle pin 7 and the first fork part 121, the sliding friction between the knuckle pin 7 and the first fork part 121 can be changed into rolling friction, which is conducive to reducing the steering starting force of the front axle assembly 100, for example, to 80 N·m, and can also reduce the risk of wear or even failure of the knuckle pin 7 and the first fork part 121 caused by frequent friction between the knuckle pin 7 and the first fork part 121, thereby improving the service life of the knuckle pin 7 and the knuckle 1, and further improving the working life and use reliability of the front axle assembly 100.
[0062] In some embodiments of the utility model, as shown in Figure 1 The second fork part 122 is provided with a joint bearing 124, and the knuckle pin 7 penetrates the joint bearing 124.
[0063] The second fork part 122 is formed with a second assembly hole 126, the steering knuckle pin 7 is arranged in the second assembly hole 126, and the joint bearing 124 is assembled in the second assembly hole 126, for example, the steering knuckle pin 7 is arranged in the joint bearing 124, and the joint bearing 124 is assembled in the second assembly hole 126, so that the joint bearing 124 and the steering knuckle pin 7 are both assembled in the second fork part 122, and the joint bearing 124 is clamped between the steering knuckle pin 7 and the second fork part 122. By arranging the joint bearing 124 between the steering knuckle pin 7 and the second fork part 122, the sliding friction between the steering knuckle pin 7 and the second fork part 122 can be changed into rolling friction, which is beneficial to further reduce the steering starting force of the front axle assembly 100, for example, the steering starting force is reduced to 80 N·m, and the risk of wear or even failure of the steering knuckle pin 7 and the second fork part 122 caused by frequent friction between the steering knuckle pin 7 and the second fork part 122 can also be reduced, which is beneficial to improve the service life of the steering knuckle pin 7 and the steering knuckle 1, thereby further improving the working life and use reliability of the front axle assembly 100.
[0064] It can be understood that by arranging the tapered roller bearing 123 between the steering knuckle pin 7 and the first fork part 121 and the joint bearing 124 between the steering knuckle pin 7 and the second fork part 122, the steering knuckle pin 7 can be lubricated by the tapered roller bearing 123 and the joint bearing 124, so that the lubrication of the steering knuckle pin 7 is more sufficient, the steering knuckle pin 7 is less likely to fail, and the service life of the steering knuckle pin 7 is effectively improved, for example, the steering knuckle pin 7 can be maintained for 80*10 4 km without maintenance.
[0065] As some embodiments of the present application, as shown in Figure 1 the front axle assembly 100 can also include a third oil seal 8 and a fourth oil seal 9, the third oil seal 8 is assembled between the tapered roller bearing 123 and the first fork part 121 to seal the gap between the steering knuckle 1 and the steering knuckle pin 7, and the fourth oil seal 9 is assembled between the steering knuckle pin 7 and the second fork part 122 to seal the gap between the steering knuckle 1 and the steering knuckle pin 7, thereby reducing the risk of dust and water vapor entering the first assembly hole 125 or the second assembly hole 126 from the gap between the corresponding first bearing 3 and the hub 2. By arranging the third oil seal 8 and the fourth oil seal 9 to seal the corresponding gap between the steering knuckle 1 and the steering knuckle pin 7, the dustproof and oil leakage performance of the front axle assembly 100 can be further improved, and the waterproof performance of the front axle assembly 100 can also be further improved, for example, the waterproof grade is improved to IP67, which is beneficial to further improve the working reliability and service life of the front axle assembly 100.
[0066] The front axle assembly 100 of the vehicle bridge assembly according to the embodiment of the utility model, through setting up multiple first bearings 3 all set in the mounting shaft 11, and abutting of any two adjacent first bearings 3, can improve the control mode of the first bearing 3 pre-tightening force, is favorable to improving the precision of the first bearing 3 pre-tightening force control, thereby improving the reliability of the front axle assembly 100, can also make the first bearing 3 play be negative, to improve the service life of the first bearing 3, thereby improving the maintenance-free mileage of the front axle assembly 100, and further improving the performance of the front axle assembly 100.
[0067] The vehicle according to the embodiment of the utility model, including the vehicle bridge assembly of the above embodiment. Through setting up multiple first bearings 3 all set in the mounting shaft 11, and abutting of any two adjacent first bearings 3, can improve the control mode of the first bearing 3 pre-tightening force, is favorable to improving the precision of the first bearing 3 pre-tightening force control, thereby improving the reliability of the front axle assembly 100, can also make the first bearing 3 play be negative, to improve the service life of the first bearing 3, thereby improving the maintenance-free mileage of the front axle assembly 100, and further improving the performance of the front axle assembly 100, and further improving the performance of the vehicle. The appearance of the vehicle bridge assembly can fill the blank of the front axle assembly 100 applied to the automatic driving of commercial vehicles, make the control of the steering of the automatic driving system of commercial vehicles more accurate, respond faster and more reliably, and is an indispensable resource for the comprehensive promotion of the automatic driving technology of commercial vehicles.
[0068] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "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 exemplary description of the above terms does not necessarily refer to 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.
[0069] 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 front axle assembly for a vehicle, characterized in that, include: A steering knuckle having a mounting shaft and a steering knuckle body, the mounting shaft being located on one side of the steering knuckle body and fixedly connected to the steering knuckle body; The wheel hub and a plurality of first bearings are provided. The plurality of first bearings are all sleeved on the mounting shaft and arranged sequentially along the axial direction of the mounting shaft. The wheel hub is sleeved on the plurality of first bearings so that the wheel hub is rotatably mounted on the mounting shaft, and any two adjacent first bearings abut against each other. Along the axial direction of the mounting shaft, the first bearing facing the steering knuckle body abuts against the steering knuckle body.
2. The front axle assembly for a vehicle according to claim 1, characterized in that, Multiple first bearings have the same structure.
3. The front axle assembly for a vehicle according to claim 1, characterized in that, The hub has a first mounting hole, the mounting shaft passes through the first mounting hole, and multiple first bearings are assembled in the first mounting hole.
4. The front axle assembly for a vehicle according to claim 3, characterized in that, Each of the first bearings includes: an inner bearing ring and a plurality of rollers. The inner bearing ring is fitted onto the mounting shaft. A plurality of first grooves are formed on the surface of the inner bearing ring away from the mounting shaft. The plurality of first grooves are arranged circumferentially along the inner bearing ring. A plurality of second grooves are formed on the inner wall of the first mounting hole. The plurality of second grooves correspond one-to-one with the plurality of first grooves. The rollers are assembled into the corresponding first grooves and second grooves.
5. The front axle assembly for a vehicle according to claim 4, characterized in that, The surface roughness of the roller is Ra1, the surface roughness of the inner wall of the first groove is Ra2, and the surface roughness of the inner wall of the second groove is Ra3, satisfying the following relationships: 0.01μm≤Ra1≤0.125μm, 0.01μm≤Ra2≤0.125μm, 0.01μm≤Ra3≤0.125μm.
6. The front axle assembly for a vehicle according to any one of claims 1-5, characterized in that, A first oil seal and a second oil seal, wherein the first oil seal is disposed between the first bearing and the hub at one end to seal the gap between the first bearing and the hub, and the second oil seal is disposed between the first bearing and the hub at the other end to seal the gap between the first bearing and the hub.
7. The front axle assembly for a vehicle according to any one of claims 1-5, characterized in that, Also includes: A connecting shaft and a steering knuckle pin are provided. The steering knuckle body has a first fork and a second fork formed on the side opposite to the mounting shaft. The first fork and the second fork are opposite to each other and spaced apart. The steering knuckle pin is assembled to the first fork and the second fork. The connecting shaft is mounted on the steering knuckle pin to make the connecting shaft and the steering knuckle movably connected.
8. The front axle assembly for a vehicle according to claim 7, characterized in that, The first fork is provided with a tapered roller bearing, and the steering knuckle pin passes through the tapered roller bearing.
9. The front axle assembly for a vehicle according to claim 7, characterized in that, The second fork is provided with a spherical bearing, and the steering knuckle pin passes through the spherical bearing.
10. An axle assembly, characterized in that, Includes a front axle assembly for a vehicle according to any one of claims 1-9.
11. A vehicle, characterized in that, Includes the axle assembly according to claim 10.