Axle housing assembly, drive axle and vehicle

Abstract

The utility model relates to the technical field of drive axles, and provides an axle housing assembly, a drive axle and a vehicle, the axle housing assembly comprises an axle housing, an axle tube and a positioning pin, the two ends of the axle housing are provided with insertion holes, and the side walls of the insertion holes are provided with first pin holes; each insertion hole corresponds to one shaft tube, the insertion end of each shaft tube is located in the corresponding insertion hole and is in interference fit with the corresponding insertion hole, a second pin hole is formed in each shaft tube, and a texture structure is arranged on the insertion section of each shaft tube; the positioning pin is embedded in the first pin hole and the second pin hole, and the positioning pin and the axle housing are welded and fixed. According to the arrangement, the insertion end of the axle tube is inserted into the insertion hole of the axle housing, so that the axle tube is in interference fit with the axle housing, and the axle tube and the axle housing are fastened together through the positioning pin. The positioning pin and the axle housing are welded and fixed, so that the positioning pin can be effectively prevented from loosening, and the stability and the reliability of the positioning pin structure are improved. The texture structure can increase the friction force between the axle tube and the axle housing, so that the connection strength between the axle tube and the axle housing is improved, and the risk of loosening of the axle tube and the axle housing is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drive axles, in particular to a bridge housing assembly, a drive axle and a vehicle. Background Art

[0002] The drive axle is one of the important components in the automotive transmission system, mainly used to transmit the power generated by the engine to the wheels. As one of the core parts of the drive axle, the bridge housing assembly bears the main structural and functional components of the drive axle.

[0003] The hub-pressing type bridge housing assembly is a commonly used drive axle assembly for heavy trucks. An interference fit is often adopted between the bridge housing and the axle tube, and the axle tube is pressed into the bridge housing by stamping. The fitting condition between the bridge housing and the axle tube often plays an important role in the normal operation of the bridge assembly. However, under harsh working conditions, the fitting between the axle tube and the bridge housing often fails, resulting in the axle tube coming out and slipping, which in turn affects the normal use of the bridge housing assembly and the driving safety of the vehicle.

[0004] Therefore, how to solve the problem that the axle tube and the bridge housing in the existing bridge housing assembly are prone to looseness and failure has become an important technical problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] The utility model provides a bridge housing assembly, a drive axle and a vehicle to solve the defect that the axle tube and the bridge housing in the existing bridge housing assembly are prone to looseness and failure.

[0006] The utility model provides a bridge housing assembly, comprising:

[0007] A bridge housing with jack holes provided at both ends, and first pin holes provided on the side walls of the jack holes;

[0008] An axle tube, with one axle tube corresponding to each jack hole. The insertion end of the axle tube is located in the jack hole, and the insertion end of the axle tube is in interference fit with the jack hole. Second pin holes are provided on the axle tube, and a texture structure is provided at the insertion end of the axle tube;

[0009] A positioning pin embedded in the first pin hole and the second pin hole, and the positioning pin is fixedly welded to the bridge housing.

[0010] According to the bridge housing assembly provided by the utility model, the second pin hole is a blind hole, the positioning pin is in interference fit with the first pin hole, and the positioning pin is in interference fit with the second pin hole.

[0011] According to the bridge housing assembly provided by the utility model, exhaust grooves are provided on the outer side wall of the positioning pin.

[0012] According to a bridge housing assembly provided by the present utility model, the exhaust groove is a spiral groove, and the spiral axis of the spiral groove coincides with the central axis of the positioning pin.

[0013] According to a bridge housing assembly provided by the present utility model, the first end of the positioning pin is located in the first pin hole, the second end of the positioning pin is located in the second pin hole, the end face of the first end of the positioning pin is located inside the bridge housing, and the positioning pin and the bridge housing are fixed by plug welding technology.

[0014] According to a bridge housing assembly provided by the present utility model, the insertion end of the axle tube has a first insertion section and a second insertion section, the first insertion section and the second insertion section are coaxially arranged, the first insertion section is located at the end of the insertion end of the axle tube, the jack includes a first jack section and a second jack section, the first jack section and the second jack section are coaxially arranged, the first insertion section and the first jack section are in interference fit, and the second insertion section and the second jack section are in interference fit;

[0015] The outer diameter of the first insertion section is smaller than the outer diameter of the second insertion section, the diameter of the first jack section is smaller than the diameter of the second jack section, the texture structure is arranged on the first insertion section, and the second pin hole is arranged on the second insertion section.

[0016] According to a bridge housing assembly provided by the present utility model, the texture structure includes a plurality of straight grooves, the axes of the straight grooves are parallel to the axis of the axle tube, and the plurality of straight grooves are circumferentially spaced apart along the axle tube.

[0017] According to a bridge housing assembly provided by the present utility model, a set of the first pin holes is arranged at each end of the bridge housing, the set of the first pin holes is circumferentially spaced apart along the bridge housing, and each first pin hole corresponds to a second pin hole and a positioning pin.

[0018] The present utility model also provides a drive axle, including the above-mentioned bridge housing assembly.

[0019] The present utility model also provides a vehicle, including the above-mentioned bridge housing assembly, or including the above-mentioned drive axle.

[0020] The axle housing assembly provided by the present utility model includes an axle housing, a shaft tube, and a positioning pin. Jacks are provided at both ends of the axle housing, and each jack corresponds to a shaft tube. The insertion end of the shaft tube is located in the jack of the axle housing, and the insertion end of the shaft tube is in interference fit with the jack of the axle housing. A texture structure is provided at the insertion end of the shaft tube, and the texture structure can increase the friction between the insertion end of the shaft tube and the jack of the axle housing, and can increase the connection strength between the shaft tube and the axle housing. A first pin hole is provided on the side wall of the jack, a second pin hole is provided on the shaft tube, and the positioning pin is embedded inside the first pin hole and the second pin hole. Through the interaction between the positioning pin and the side wall of the first pin hole and the interaction between the positioning pin and the side wall of the second pin hole, the relative movement of the axle housing and the shaft tube along the axis direction of the jack and the relative rotation along the circumferential direction of the jack can be restricted, and the relative stability between the shaft tube and the axle housing can be improved. The positioning pin is fixedly welded to the axle housing, which improves the stability of the positioning pin and can effectively reduce the risk of the positioning pin loosening. With such a setting, combining the interference fit between the shaft tube and the axle housing, the pinning and fixing of the positioning pin, the texture structure, and the welding and fixing of the positioning pin to the axle housing, the stability of the connection structure between the shaft tube and the axle housing is greatly improved, and the problem that the axle housing assembly in the prior art is prone to the loosening and failure of the shaft tube and the axle housing is solved.

[0021] Furthermore, in the drive axle provided by the present utility model, due to having the axle housing assembly as described above, it also has various advantages as described above.

[0022] Furthermore, in the vehicle provided by the present utility model, due to having the axle housing assembly or the drive axle as described above, it also has various advantages as described above. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the axle housing assembly provided by the present utility model.

[0025] Figure 2 It is an exploded view of the axle housing assembly provided by the present utility model.

[0026] Figure 3 It is a partial cross-sectional view of the axle housing assembly provided by the present utility model.

[0027] Figure 4 It is a schematic structural diagram of the shaft tube provided by the present utility model.

[0028] Figure 5It is a schematic structural diagram of the positioning pin provided by the present utility model.

[0029] Reference numerals:

[0030] 1. Bridge housing; 2. Jack; 3. First pin hole; 4. Axle tube; 5. Second pin hole; 6. Texture structure; 7. Positioning pin; 8. Spiral groove; 9. First insertion section; 10. Second insertion section. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.

[0032] The following will be combined with Figures 1 to 5 Describe the bridge housing assembly of the present utility model.

[0033] As Figures 1 to 5 shown, the bridge housing assembly provided by the embodiment of the present utility model includes a bridge housing 1, an axle tube 4 and a positioning pin 7.

[0034] Specifically, jacks 2 are provided at both ends of the bridge housing 1, each jack 2 corresponds to an axle tube 4, the insertion end of the axle tube 4 is located in the jack 2 of the bridge housing 1, the axis of the axle tube 4 coincides with the axis of the bridge housing 1, and the insertion end of the axle tube 4 is in interference fit with the jack 2 of the bridge housing 1.

[0035] A texture structure 6 is provided at the insertion end of the axle tube 4. The texture structure 6 can increase the friction between the insertion end of the axle tube 4 and the jack 2 of the bridge housing 1, and can increase the connection strength between the axle tube 4 and the bridge housing 1.

[0036] A first pin hole 3 is provided on the side wall of the jack 2, a second pin hole 5 is provided on the axle tube 4, and the axis of the first pin hole 3 coincides with the axis of the second pin hole 5. Specifically, the axis of the first pin hole 3 is perpendicular to the axis of the bridge housing 1, so that the axis of the first pin hole 3 can be arranged along the radial direction of the jack 2 on the bridge housing 1. The axis of the second pin hole 5 is perpendicular to the axis of the axle tube 4, so that the axis of the second pin hole 5 can be arranged along the radial direction of the axle tube 4.

[0037] The positioning pin 7 is embedded in the first pin hole 3 and the second pin hole 5. Through the interaction between the positioning pin 7 and the side wall of the first pin hole 3 and the interaction between the positioning pin 7 and the side wall of the second pin hole 5, the relative movement of the bridge housing 1 and the axle tube 4 along the axis direction of the jack 2 and the relative rotation along the circumferential direction of the jack 2 can be restricted, and the relative stability between the axle tube 4 and the bridge housing 1 can be improved.

[0038] The positioning pin 7 is fixedly welded to the axle housing 1, which improves the stability of the positioning pin 7 and can effectively reduce the risk of the positioning pin 7 coming loose.

[0039] With such a setting, combining the interference fit between the axle tube 4 and the axle housing 1, the tight fixing of the positioning pin 7, the texture structure 6, and the welded fixing of the positioning pin 7 and the axle housing 1, the stability of the connection structure between the axle tube 4 and the axle housing 1 is greatly improved, and the problem that the axle tube and the axle housing in the prior art are prone to come loose and fail is solved.

[0040] In this embodiment, a set of first pin holes 3 is provided at each end of the axle housing 1, and each set of first pin holes 3 includes at least two first pin holes 3. The respective first pin holes 3 in each set are circumferentially spaced along the axle housing 1, and the axial direction of the first pin holes 3 is arranged radially along the insertion hole 2 of the axle housing 1. One second pin hole 5 and one positioning pin 7 are correspondingly provided for each first pin hole 3. The axle housing 1 and each axle tube 4 are connected by at least two positioning pins 7, which can improve the stability of the connection structure between the axle housing 1 and the axle tube 4.

[0041] A set of first pin holes 3 includes 2 to 8 first pin holes 3, and the number and positions of the first pin holes 3 can be flexibly set according to the axle housing 1, and no specific limitation is made.

[0042] In this embodiment, a set of first pin holes 3 includes two first pin holes 3, that is to say, each axle tube 4 is connected to the axle housing 1 by two positioning pins 7.

[0043] In the embodiment of the present utility model, the positioning pin 7 is in interference fit with the first pin hole 3, and the positioning pin 7 is in interference fit with the second pin hole 5. Through the tight fit between the positioning pin 7 and the axle housing 1 and the tight fit between the positioning pin 7 and the axle tube 4, the problem of oil leakage at the position of the positioning pin 7 can be reduced.

[0044] The first pin hole 3 is a through hole, and the first pin hole 3 penetrates through the side wall of the insertion hole 2. The second pin hole 5 is set as a blind hole, and the second pin hole 5 is located on the outer side wall of the insertion end of the axle tube 4 and does not penetrate through the inner side wall of the insertion end of the axle tube 4, which can further reduce the problem of oil leakage at the position of the positioning pin 7.

[0045] In this embodiment, an exhaust groove is provided on the outer side wall of the positioning pin 7. The positioning pin 7 is in interference fit with the axle housing 1, and the positioning pin 7 is in interference fit with the axle tube 4. The positioning pin 7 is installed in the first pin hole 3 of the axle housing 1 and the second pin hole 5 of the axle tube 4 by pressing. The setting of the exhaust groove can ensure that the gas in the first pin hole 3 and the second pin hole 5 can be discharged smoothly, ensure the smooth pressing of the positioning pin 7, and ensure that the positioning pin 7 is pressed in place.

[0046] The above exhaust groove can be but is not limited to being set as a straight groove, a spiral groove, etc.

[0047] In this embodiment, the exhaust groove is set as a spiral groove 8, and the spiral axis of the spiral groove 8 coincides with the central axis of the positioning pin 7. Refer to Figure 5 .

[0048] In a further embodiment, the first end of the positioning pin 7 is located in the first pin hole 3, and the second end of the positioning pin 7 is located in the second pin hole 5. The axial length of the positioning pin 7 is less than the sum of the axial lengths of the first pin hole 3 and the second pin hole 5. After the positioning pin 7 is pressed into the first pin hole 3 and the second pin hole 5, the second end of the positioning pin 7 abuts against the bottom wall of the second pin hole 5. At this time, the end face of the first end of the positioning pin 7 is located inside the axle housing 1, and the end face of the first end of the positioning pin 7 and the side wall of the first pin hole 3 form a groove structure.

[0049] In this embodiment, the first end of the positioning pin 7 is fixedly connected to the axle housing 1 by plug welding. The plug welding process can fill the groove structure formed by the end face of the first end of the positioning pin 7 and the side wall of the first pin hole 3, realizing the sealing between the first end of the positioning pin 7 and the axle housing 1, and further avoiding the problem of oil leakage.

[0050] It should be noted that in this embodiment, only the surface position of the positioning pin 7 and the axle housing 1 is welded and fixed, which will not affect the axle tube 4, and can completely avoid the welding heat affected zone and thermal stress concentration of the axle tube 4, reducing the risk of fracture of the axle tube 4.

[0051] In the embodiment of the present utility model, the insertion end of the axle tube 4 has a first insertion section 9 and a second insertion section 10. The first insertion section 9 and the second insertion section 10 are coaxially arranged, and the first insertion section 9 is located at the end of the insertion end of the axle tube 4.

[0052] Correspondingly, the jack hole 2 includes a first jack hole part and a second jack hole part. The first jack hole part and the second jack hole part are coaxially arranged, and the second jack hole part is closer to the end of the axle housing 1 than the first jack hole part.

[0053] After the insertion end of the axle tube 4 is inserted into the jack hole 2 of the axle housing 1, the first insertion section 9 and the first jack hole part are in interference fit, and the second insertion section 10 and the second jack hole part are in interference fit. The insertion end of the axle tube 4 and the jack hole 2 of the axle housing 1 are in interference fit in two sections, which can improve the reliability of the connection structure between the axle tube 4 and the axle housing 1.

[0054] In this embodiment, the texture structure 6 is arranged on the first insertion section 9, the second pin hole 5 is arranged on the second insertion section 10, and the outer diameter of the first insertion section 9 is smaller than that of the second insertion section 10. Correspondingly, the diameter of the first jacking part is smaller than that of the second jacking part. Ensure that the first insertion section 9 and the first jacking part are in interference fit, and the second insertion section 10 and the second jacking part are in interference fit. When the insertion end of the shaft tube 4 is inserted into the shaft hole of the axle housing 1, the second jacking part will not interfere with the first insertion section 9, and the second jacking part will not damage the texture structure 6 on the first insertion section 9.

[0055] In this embodiment, the texture structure 6 includes a plurality of straight grooves, the axes of the straight grooves are parallel to the axis of the shaft tube 4, and the plurality of straight grooves are distributed at intervals along the circumferential direction of the shaft tube 4. Refer to Figure 4 .

[0056] When the insertion end of the shaft tube 4 is inserted into the jacking hole 2 of the axle housing 1, a normal temperature press-fitting process is adopted, and the press-fitting process will not affect the strength of the axle housing 1 and the shaft tube 4. The first jacking part in the axle housing 1 will deform under the action of the texture structure 6 of the first insertion section 9, and part of the material on the side wall of the first jacking part will enter the straight groove to form a convex part. That is to say, the texture structure 6 on the shaft tube 4 is fitted with the inner wall of the jacking hole 2 of the axle housing 1, and the interaction between the convex part and the straight groove can limit the circumferential rotation of the shaft tube 4 and the axle housing 1.

[0057] In summary, for the axle housing assembly provided by the embodiment of the present invention, a positioning pin 7 with a relatively short length is press-fitted into the pin holes of the axle housing 1 and the shaft tube 4 in an interference fit manner, and a groove structure is formed between the end face of the positioning pin 7 and the pin hole of the axle housing 1, and then plug welding is performed, which can completely avoid the problem of loosening of the positioning pin 7 under heavy load and long-term use conditions, and completely solve the problem of oil leakage at the pin hole position under long-term use conditions, and the reliability of the axle housing assembly is greatly improved. The axle housing assembly provided by this embodiment can meet the working conditions requirements of various heavy loads, mining areas, mountainous areas, etc. Under long-term use, the shaft tube 4 will not loosen, will not leak oil, and has a low risk of fracture.

[0058] On the other hand, the embodiment of the present invention also provides a drive axle, including the axle housing assembly provided by any of the above embodiments. The axle housing assembly provided by any of the above embodiments has the advantages of strong stability and the shaft tube 4 and the axle housing 1 are not easily loosened. Therefore, the drive axle in this embodiment has the advantages of strong stability and high reliability. The derivation process of the beneficial effects of the drive axle in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above-mentioned axle housing assembly, so it will not be elaborated here.

[0059] In another aspect, an embodiment of the present invention further provides a vehicle, including the axle housing assembly or the drive axle provided in any of the above embodiments. It has all the advantages of the above axle housing assembly, which will not be elaborated here. The derivation process of the beneficial effects of the vehicle in the embodiment of the present invention is generally similar to that of the beneficial effects of the above axle housing assembly, so it will not be elaborated here.

[0060] In the embodiment of the present invention, the type of the vehicle is not limited. For example, the vehicle can be a heavy truck or the like. In other words, as long as the vehicle can use the axle housing assembly in the embodiment of the present invention.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bridge housing assembly, characterized in that, Comprising: A bridge housing (1) with socket holes (2) provided at both ends, and a first pin hole (3) provided on the side wall of the socket hole (2); Axle tubes (4), with one axle tube (4) corresponding to each socket hole (2). The insertion end of the axle tube (4) is located within the socket hole (2), and the insertion end of the axle tube (4) is in interference fit with the socket hole (2). A second pin hole (5) is provided on the axle tube (4), and a texture structure (6) is provided at the insertion end of the axle tube (4); A positioning pin (7) embedded within the first pin hole (3) and the second pin hole (5), and the positioning pin (7) is fixedly welded to the bridge housing (1).

2. The axle housing assembly according to claim 1, wherein, The second pin hole (5) is a blind hole. The positioning pin (7) is in interference fit with the first pin hole (3), and the positioning pin (7) is in interference fit with the second pin hole (5).

3. The axle housing assembly according to claim 2, wherein, An exhaust groove is provided on the outer side wall of the positioning pin (7).

4. The axle housing assembly according to claim 3, wherein, The exhaust groove is a spiral groove (8), and the spiral axis of the spiral groove (8) coincides with the central axis of the positioning pin (7).

5. The axle housing assembly according to any one of claims 1-4, characterized in that, The first end of the positioning pin (7) is located within the first pin hole (3), the second end of the positioning pin (7) is located within the second pin hole (5), the end face of the first end of the positioning pin (7) is located inside the bridge housing (1), and the positioning pin (7) is fixed to the bridge housing (1) by plug welding process.

6. The axle housing assembly according to any one of claims 1-4, characterized in that, The insertion end of the axle tube (4) has a first insertion section (9) and a second insertion section (10). The first insertion section (9) and the second insertion section (10) are coaxially arranged. The first insertion section (9) is located at the end of the insertion end of the axle tube (4). The socket hole (2) includes a first socket hole part and a second socket hole part. The first socket hole part and the second socket hole part are coaxially arranged. The first insertion section (9) is in interference fit with the first socket hole part, and the second insertion section (10) is in interference fit with the second socket hole part; The outer diameter of the first insertion section (9) is smaller than the outer diameter of the second insertion section (10). The diameter of the first socket hole part is smaller than the diameter of the second socket hole part. The texture structure (6) is provided on the first insertion section (9), and the second pin hole (5) is provided on the second insertion section (10).

7. The axle housing assembly according to any one of claims 1-4, characterized in that, The texture structure (6) includes a plurality of straight grooves. The axis of the straight grooves is parallel to the axis of the axle tube (4), and the plurality of straight grooves are circumferentially spaced apart along the axle tube (4).

8. The axle housing assembly according to any one of claims 1-4, characterized in that, One set of the first pin holes (3) is provided at each end of the bridge housing (1). One set of the first pin holes (3) is circumferentially spaced apart along the bridge housing (1), and each first pin hole (3) corresponds to one second pin hole (5) and one positioning pin (7).

9. A drive axle, characterized in that, Comprising the bridge housing assembly according to any one of claims 1 to 8.

10. A vehicle, characterized in that, Comprising the bridge housing assembly according to any one of claims 1 to 8, or comprising the drive axle according to claim 9.

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