Vehicle front axle assembly structure

Abstract

The utility model provides a vehicle front axle assembly structure which comprises a front axle, a steering knuckle, a pin shaft and a thrust bearing, and the front axle is provided with a first pin hole; a second pin hole and a third pin hole are formed in the steering knuckle; the pin shaft is in interference fit with the first pin hole and is in clearance fit with the second pin hole and the third pin hole, and an inclined chamfer is formed in the end, close to the third pin hole, of the first pin hole. The pin shaft is sleeved with the thrust bearing, and the thrust bearing is located between the front shaft and the first pin hole. The pin shaft and the front shaft are in interference fit, the inclined chamfer is formed in the end, facing the thrust bearing, of the first pin hole of the front shaft, in this way, stress of the end of the first pin hole is reduced, the probability that the pin hole of the front shaft cracks is reduced, and therefore the application stability is improved, meanwhile, the inclined chamfer of the end of the first pin hole is filled with the elastic material, and the service life of the pin hole is prolonged. Therefore, foreign matters can be prevented from entering, and abrasion of the first pin hole and the thrust bearing can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle front axle assembly structure. Background Art

[0002] The front axle is an important vehicle accessory. It is a device used to transmit the forces between the frame and the front wheels and the bending and torque generated by them. In the early stages of development, after the sample production is completed, each front axle needs to be assembled with the kingpin, steering knuckle and other related parts, and then undergo fatigue life bench tests. Only when the front axle meets the test requirements can it be put into production.

[0003] The existing utility model patent with authorization announcement number CN204623559U discloses a steering knuckle assembly structure and a vehicle having the same. The steering knuckle assembly structure includes a kingpin, an I-beam, a steering knuckle and a bearing; wherein: the I-beam is sleeved outside the kingpin, and the steering knuckle is sleeved outside the kingpin extending from both ends of the I-beam; a bearing hole for accommodating the bearing is opened at the upper end of the steering knuckle, and the bearing is a tapered roller bearing.

[0004] As in the above technical solution, in order to avoid bearing damage, the tapered roller bearing and the I-beam are assembled separately, but this will make the kingpin assembly difficult and complicated. At the same time, the pin hole at the end of the I-beam is prone to cracking and damage due to stress. The kingpin is set to be assembled in a conical step shape, which will cause the wall of the I-beam pin hole to become thinner, further increasing the probability of cracking and affecting the reliability of the front axle. Utility Model Content

[0005] In view of this, the utility model proposes a vehicle front axle assembly structure with convenient assembly and stable front axle structure, so as to solve the problems of inconvenient assembly and unstable structure of the existing front axle structure.

[0006] The technical solution of the utility model is implemented as follows: The utility model provides a vehicle front axle assembly structure, including a front axle, a steering knuckle, a pin shaft and a thrust bearing, wherein:

[0007] The front axle is provided with a first pin hole;

[0008] The steering knuckle is provided with a second pin hole and a third pin hole;

[0009] The pin shaft is interference fit with the first pin hole, and is clearance fit with the second pin hole and the third pin hole, and an oblique chamfer is provided at one end of the first pin hole close to the second pin hole;

[0010] The thrust bearing is sleeved on the pin shaft, and the thrust bearing is located between the front shaft and the second pin hole.

[0011] On the basis of the above technical solution, preferably, the diameter of the large diameter end of the tapered hole formed by the chamfer is smaller than the diameter of the thrust bearing.

[0012] On the basis of the above technical solution, preferably, an embedding groove is provided at the end of the pin shaft, and the embedding groove is in a strip-shaped structure and spans across the end surface of the pin shaft.

[0013] On the basis of the above technical solution, preferably, the steering knuckle includes an end shaft, a connecting plate, a sleeve and a connecting cylinder, wherein:

[0014] One end of the end shaft is connected to the connecting plate;

[0015] Two sleeves are provided on one side of the connecting plate away from the end shaft, and the second pin hole and the third pin hole are respectively provided in one sleeve;

[0016] One connecting tube is respectively arranged on both sides of the sleeve where the second pin hole is provided, and the diameter of the connecting tube is smaller than the axial length of the sleeve.

[0017] On the basis of the above technical solution, preferably, the end shaft, connecting plate, sleeve and connecting tube are forged into an integrated structure.

[0018] On the basis of the above technical solution, preferably, the steering knuckle includes a base, the base and the sleeve with the third pin hole are forged into an integral structure, and a plurality of bolt holes are provided on the end surface of the base away from the front axle.

[0019] On the basis of the above technical solution, preferably, a clearance groove is provided in the connecting plate corresponding to the front axle.

[0020] On the basis of the above technical solution, preferably, it further comprises a first bushing and a second bushing, wherein:

[0021] The first bushing is disposed in the second pin hole;

[0022] The second bushing is disposed in the third pin hole;

[0023] The first bushing and the second bushing are both sleeve-connected with the pin shaft.

[0024] On the basis of the above technical solution, preferably, one end of the first bushing is abutted against the thrust bearing, and the other end of the first bushing is located inside the second pin hole.

[0025] On the basis of the above technical solution, preferably, it also includes a gasket, which is sleeved on the pin shaft and is located on a side of the front axle close to the third pin hole.

[0026] The vehicle front axle assembly structure of the utility model has the following beneficial effects compared with the prior art:

[0027] (1) By providing interference fit between the pin shaft and the front axle and providing an oblique chamfer at the end of the first pin hole of the front axle facing the thrust bearing, the overall rigidity of the application is improved, and at the same time, micro-wear between the pin shaft and the first pin hole of the front axle can be effectively prevented, the force on the end of the first pin hole is reduced, and the probability of cracking of the pin hole of the front axle is reduced, thereby improving the stability of the application. At the same time, the oblique chamfer at the end of the first pin hole is filled with elastic material, which can prevent foreign matter from entering, which is conducive to preventing wear of the first pin hole and the thrust bearing;

[0028] (2) In the steering knuckle, two pin holes are respectively opened in a sleeve, and one sleeve is connected to the connecting sleeve, and the other sleeve is connected to the base, which is conducive to strengthening the structural strength of the sleeve. At the same time, the diameter of the connecting sleeve is smaller than the axial length of the sleeve, which can prevent interference with the assembly work of the front axle and the steering. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a three-dimensional diagram of the vehicle front axle assembly structure of the utility model;

[0031] Figure 2 It is a side view of the vehicle front axle assembly structure of the utility model;

[0032] Figure 3 For the utility model Figure 2 Middle AA section;

[0033] Figure 4 For the utility model Figure 3 A magnified view of the structure at point A;

[0034] Figure 5 It is an exploded structural diagram of the front axle and steering knuckle of the vehicle front axle assembly structure of the utility model;

[0035] Figure 6 It is a bottom structural diagram of the steering knuckle of the vehicle front axle assembly structure of the utility model;

[0036] In the figure: 1, front axle; 101, first pin hole; 102, chamfer; 2, steering knuckle; 21, end shaft; 22, connecting plate; 23, sleeve; 24, connecting tube; 25, base; 201, second pin hole; 202, third pin hole; 203, bolt hole; 204, clearance groove; 3, pin shaft; 301, embedded groove; 4, thrust bearing; 5, first bushing; 6, second bushing; 7, gasket. DETAILED DESCRIPTION

[0037] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] like Figures 1 to 6 As shown, the vehicle front axle assembly structure of the utility model includes a front axle 1, a steering knuckle 2, a pin shaft 3, a thrust bearing 4, a first bushing 5, a second bushing 6 and a gasket 7.

[0039] like Figures 1 to 4 As shown, the front axle 1 is provided with a first pin hole 101; the steering knuckle 2 is provided with a second pin hole 201 and a third pin hole 202; the pin shaft 3 is interference fit with the first pin hole 101, and is clearance fit with the second pin hole 201 and the third pin hole 202;

[0040] As in the above structure, the pin shaft 3 realizes the connection between the front axle 1 and the steering knuckle 2 through three pin holes, so that the two can rotate relative to each other; the front axle 1 and the pin shaft 3 adopt an interference fit, which can not only improve the rigidity, but also effectively prevent the first pin hole 101 of the front axle 1 from cracking due to micro-wear between the two, thereby improving the reliability of application;

[0041] During the front axle failure test, the first pin hole 101 of the front axle 1 has a relatively large cracking rate from the lower end surface, so an oblique chamfer 102 is provided at one end of the first pin hole 101 close to the second pin hole 201;

[0042] As in the above structure, by providing the chamfer 102, the force on the lower end surface of the first pin hole 101 can be reduced, so that the lower end surface of the first pin hole 101 can be effectively prevented from cracking, thereby improving the stability of application.

[0043] The thrust bearing 4 is sleeved on the pin shaft 3 , and the thrust bearing 4 is located between the front shaft 1 and the second pin hole 201 .

[0044] Furthermore, the first pin hole 101 is filled with elastic material at the chamfer 102, which can achieve a sealing effect, prevent impurities from entering and causing wear of the pin hole and bearing parts, and further improve the structural stability. At the same time, the chamfer 102 can also improve the convenience of assembling the pin shaft 3 with the front shaft 1 and the steering knuckle 2.

[0045] Specifically, the elastic material may be a rubber ring.

[0046] like Figure 4 As shown, the diameter of the large diameter end of the tapered hole formed by the oblique chamfer 102 is smaller than the diameter of the thrust bearing 4;

[0047] As in the above structure, by controlling the diameter of the chamfer 102 , the thrust bearing 4 can still be supported on the front axle 1 to ensure structural stability.

[0048] like Figure 4 and Figure 5 As shown, the end of the pin shaft 3 is provided with an embedding groove 301, which is in a strip-shaped structure and spans across the end surface of the pin shaft 3;

[0049] As in the above structure, by providing the embedding groove 301 , it is convenient to adjust the position of the pin shaft 3 , so that it is convenient to connect the front axle 1 and the pin shaft 3 in series through the limiting pin later to achieve axial limiting of the pin shaft 3 .

[0050] like Figure 5 As shown, the steering knuckle 2 includes an end shaft 21, a connecting plate 22, a sleeve 23 and a connecting cylinder 24, wherein one end of the end shaft 21 is connected to the connecting plate 22; two sleeves 23 are provided on the side of the connecting plate 22 away from the end shaft 21, and the second pin hole 201 and the third pin hole 202 are each provided in one sleeve 23; one connecting cylinder 24 is provided on each side of the sleeve 23 where the second pin hole 201 is provided, and the diameter of the connecting cylinder 24 is smaller than the axial length of the sleeve 23;

[0051] As in the above structure, in the steering knuckle 2, the connecting plate 22 and the sleeve 23 are in a C-shaped structure as a whole, and the end of the front axle 1 is placed in the C-shaped structure, and then connected in series with the pin 3;

[0052] At the same time, the connecting tube 24 can improve the structural strength of the connection between the connecting plate 22 and the sleeve 23 to ensure structural stability;

[0053] By controlling the diameter of the connecting tube 24, it will not form too much obstruction to the implementation, which makes it convenient to observe the internal situation of the steering knuckle 2. During assembly, it is convenient to assemble the end of the front axle 1 between the two sleeves 23. The connecting tube 24 is used to connect fasteners in series to connect other vehicle accessories.

[0054] Specifically, the end shaft 21, the connecting plate 22, the sleeve 23 and the connecting cylinder 24 are forged into an integrated structure.

[0055] like Figure 5 and Figure 6 As shown, the steering knuckle 2 includes a base 25, the base 25 and the sleeve 23 with the third pin hole 202 are forged into an integral structure, and a plurality of bolt holes 203 are formed on the end surface of the base 25 away from the front axle 1;

[0056] As described above, the base 25 can improve the structural strength of the sleeve 23, and the bolt hole 203 is used to connect vehicle accessories. At the same time, during testing, the bolt hole 203 can be connected to the test bench through a fastener to fix the front axle 1, thereby facilitating testing.

[0057] The connecting plate 22 is provided with a clearance groove 204 corresponding to the front axle 1;

[0058] As in the above structure, the provision of the clearance groove 204 can avoid interference between the end sleeve of the front axle 1 and the steering knuckle 2, and is also helpful in reducing the length of the front axle assembly to adapt to vehicle specifications.

[0059] As shown in the figure, the first bushing 5 is disposed in the second pin hole 201; the second bushing 6 is disposed in the third pin hole 202; the first bushing 5 and the second bushing 6 are both sleeved and connected with the pin shaft 3;

[0060] As in the above structure, by providing a bushing, wear between parts can be reduced, and at the same time, a sealing protection function is played to increase the service life of the front axle.

[0061] One end of the first bushing 5 is abutted against the thrust bearing 4, and the other end of the first bushing 5 is located inside the second pin hole 201;

[0062] As in the above structure, by setting the end of the first bushing 5 in the second pin hole 201, it is convenient to install an end cover on the end of the second pin hole 201 to achieve a better sealing effect.

[0063] like Figure 4 and Figure 5 As shown, the gasket 7 is sleeved on the pin shaft 3, and the gasket 7 is located on the side of the front axle 1 close to the third pin hole 202;

[0064] As in the above structure, the provision of the gasket 7 can, firstly, improve the sealing effect, and secondly, reduce the wear between parts.

[0065] Specific implementation steps:

[0066] During assembly, place the front axle 1 on the rack, then place the thrust bearing 4 and the steering knuckle 2, assemble the pin 3, connect a sleeve 23 and the front axle 1 in series, then place the gasket 7, and completely assemble the pin 3 into the pin hole, and finally close the ends of the second pin hole 201 and the third pin hole 202.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle front axle assembly structure, characterized in that: It comprises a front axle (1), a steering knuckle (2), a pin shaft (3) and a thrust bearing (4), wherein: The front axle (1) is provided with a first pin hole (101); The steering knuckle (2) is provided with a second pin hole (201) and a third pin hole (202); The pin shaft (3) is interference-fitted with the first pin hole (101), and is clearance-fitted with the second pin hole (201) and the third pin hole (202), and an end of the first pin hole (101) close to the second pin hole (201) is provided with an oblique chamfer (102), and the oblique chamfer (102) is filled with elastic material; The thrust bearing (4) is sleeved on the pin shaft (3), and the thrust bearing (4) is located between the front shaft (1) and the second pin hole (201).

2. The vehicle front axle assembly structure according to claim 1, characterized in that: The diameter of the large diameter end of the tapered hole formed by the oblique chamfer (102) is smaller than the diameter of the thrust bearing (4).

3. The vehicle front axle assembly structure according to claim 1, characterized in that: An embedding groove (301) is provided at the end of the pin shaft (3); the embedding groove (301) is in a strip-shaped structure and spans across the end surface of the pin shaft (3).

4. The vehicle front axle assembly structure according to claim 1, characterized in that: The steering knuckle (2) comprises an end shaft (21), a connecting plate (22), a sleeve (23) and a connecting cylinder (24), wherein: One end of the end shaft (21) is connected to the connecting plate (22); Two sleeves (23) are provided on a side of the connecting plate (22) away from the end shaft (21), and the second pin hole (201) and the third pin hole (202) are each provided in one of the sleeves (23); The connecting tube (24) is provided at each side of the sleeve (23) where the second pin hole (201) is provided, and the diameter of the connecting tube (24) is smaller than the axial length of the sleeve (23).

5. The vehicle front axle assembly structure according to claim 4, characterized in that: The end shaft (21), the connecting plate (22), the sleeve (23) and the connecting cylinder (24) are forged into an integrated structure.

6. The vehicle front axle assembly structure according to claim 4, characterized in that: The steering knuckle (2) comprises a base (25), the base (25) and the sleeve (23) having the third pin hole (202) being forged into an integral structure, and a plurality of bolt holes (203) are formed on the end surface of the base (25) away from the front axle (1).

7. The vehicle front axle assembly structure according to claim 4, characterized in that: The connecting plate (22) is provided with a clearance groove (204) corresponding to the front axle (1).

8. The vehicle front axle assembly structure according to claim 1, characterized in that: It also includes a first bushing (5) and a second bushing (6), wherein: The first bushing (5) is arranged in the second pin hole (201); The second bushing (6) is arranged in the third pin hole (202); The first bushing (5) and the second bushing (6) are both sleeve-connected to the pin shaft (3).

9. The vehicle front axle assembly structure according to claim 8, characterized in that: One end of the first bushing (5) abuts against the thrust bearing (4), and the other end of the first bushing (5) is located inside the second pin hole (201).

10. The vehicle front axle assembly structure according to claim 1, characterized in that: It also comprises a gasket (7), wherein the gasket (7) is sleeved on the pin shaft (3), and the gasket (7) is located on a side of the front shaft (1) close to the third pin hole (202).

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