Rear bearing axle hub mounting structure

Abstract

The utility model discloses a rear bearing axle hub mounting structure, which belongs to the technical field of automobile rear axles and is mainly used for mounting a rear bearing axle hub. The rear bearing axle hub mounting structure comprises a connecting shaft neck and a hub mounting plate which are sequentially arranged at the end of a bearing circular tube, the hub mounting plate is perpendicular to the horizontal plane where the bearing circular tube is located and higher than the bearing circular tube, and the hub mounting plate and the connecting shaft neck are integrally formed. The connecting shaft neck comprises a first connecting section and a second connecting section, the first connecting section is arranged in the length extending direction of the bearing round pipe, and the second connecting section is obliquely arranged between the first connecting section and the hub mounting plate. By the adoption of the rear bearing axle hub mounting structure, control over the product manufacturing quality is facilitated, the hub mounting stability is guaranteed, hub mounting plate deformation caused by welding heat is avoided, follow-up procedures and the cost for machining an uneven hub mounting plate are reduced, the number of parts is reduced, and the lightweight design requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile rear axles, in particular to a rear load-bearing axle wheel hub mounting structure. Background Art

[0002] At present, conventional rear-drive new energy vehicles often use rear load-bearing bridges to achieve the functions of load bearing and transmission. The wheel end installation structures at both ends of the rear load-bearing bridge are as follows: Figure 1 , Figure 2 As shown, it includes a hub mounting plate 3, a connecting journal 2 and a bearing circular tube 1, wherein the hub mounting plate 3 and the connecting journal 2 are split and connected by assembly welding; usually, in order to leave space between the front and rear axles to arrange more batteries, the axle tube of the rear bearing bridge cannot be coaxial with the wheel center, that is, there must be a certain height difference between the bearing circular tube 1 and the hub mounting plate 3, so the connecting journal 2 used to connect the bearing circular tube 1 and the hub mounting plate 3 is Z-shaped, one end is connected to the bearing circular tube 1, and the other end is welded to the hub mounting plate 3. At the same time, the Z-shaped connecting journal 2 can make the welding angle between the connecting journal 2 and the hub mounting plate 3 at a right angle, ensuring that the weld 25 is uniform, and there will be no uneven weld 25 at the inclined angle, thereby ensuring the welding stability of the connecting journal 2 and the hub mounting plate 3; but as Figure 3 As shown, a large amount of welding heat will be generated during welding, which will cause the hub mounting plate 3 to deform, resulting in the hub mounting plate 3 not being able to meet the flatness requirements. The hub mounting plate 3 needs to be additionally machined to ensure the flatness. The additional machining will not only increase the process and cost, but also Figure 3 As shown in (c), the thickness of the mounting surface of the wheel hub mounting plate 3 after machining is different, that is, the back side and the front side of the wheel hub mounting plate 3 are not parallel. When installing the brake base plate 4, Figure 3 As shown in (d), there is a problem that the bolt 41 and the nut 42 cannot be fully fitted together, resulting in an unstable installed wheel hub; and in order to ensure the strength of the connecting shaft neck 2, the thickness of the connecting shaft neck 2 will also be increased. Such a setting will also cause the weight of the wheel end mounting structure of the load-bearing rear axle to be heavier; therefore, there is a deformation of the wheel hub mounting plate 3 caused by welding heat between the connecting shaft neck 2 and the wheel hub mounting plate 3, resulting in an increase in subsequent steps and costs, etc., the process is difficult and affects the installation of the subsequent brake base plate 4, resulting in unstable installation of the subsequent wheel hub, and will increase the weight of the rear load-bearing axle structure, which cannot meet the requirements of lightweight design. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a rear load-bearing bridge hub installation structure, which is mainly used for the installation of the rear load-bearing bridge hub, so as to achieve the purpose of simplifying the manufacturing process and lightweight design while ensuring the stability of the hub installation.

[0004] The utility model discloses a rear load-bearing bridge wheel hub mounting structure, comprising a connecting shaft neck and a wheel hub mounting plate which are sequentially arranged at the end of a load-bearing circular tube, the wheel hub mounting plate being arranged perpendicular to the horizontal plane where the load-bearing circular tube is located and being higher than the load-bearing circular tube, the wheel hub mounting plate and the connecting shaft neck being integrally formed, the wheel hub mounting plate being provided with a mounting hole for mounting the wheel hub, the connecting shaft neck comprising a first connecting section and a second connecting section, the first connecting section, the second connecting section and the wheel hub mounting plate being sequentially connected, the first connecting section being arranged at the end of the load-bearing circular tube along the length extension direction of the load-bearing circular tube, and the second connecting section being obliquely arranged between the first connecting section and the wheel hub mounting plate.

[0005] Furthermore, a reinforcing connecting section is provided at the connection between the second connecting section and the first connecting section, and the hub mounting plate, the second connecting section, the reinforcing connecting section and the first connecting section are connected in sequence with smooth transition.

[0006] As a preferred embodiment, the outer surface of the second connecting section is arc-shaped.

[0007] Furthermore, the connecting journal is a hollow structure.

[0008] As a preferred embodiment, both sides of the second connecting section are provided with reinforcing wing plates integrally formed with the connecting journal, and the reinforcing wing plates are triangular in shape, with one side connected to the hub mounting plate and the other side connected to the second connecting section.

[0009] Furthermore, the hub mounting plate and the connecting journal are formed by forging.

[0010] The beneficial effects of the utility model are as follows: by adopting an integrally formed wheel hub mounting plate and connecting shaft neck, it is beneficial to control the product manufacturing quality, ensure the stability of the wheel hub installation, effectively avoid the deformation of the wheel hub mounting plate caused by the welding heat generated by the welding connection, and reduce the cost of subsequent processes and machining uneven wheel hub mounting plates; at the same time, the number of parts is reduced, the structural weight is reduced, and the lightweight design requirements are met. At the same time, a connecting shaft neck including a first connecting section and a second connecting section is used to replace the Z-shaped connecting shaft neck in the original split wheel hub mounting structure, and the bending part of the connecting shaft neck is reduced, which can not only meet the connection of the wheel hub mounting plate and the load-bearing circular tube located at different heights, but also facilitate the manufacture of the integrally formed connecting shaft neck and the wheel hub mounting plate, and at the same time avoid the subsequent installation of the wheel hub, due to the presence of multiple bends at the connecting shaft neck, resulting in stress concentration, causing damage to the integrally formed connecting shaft neck and the wheel hub mounting plate; and using the inclined second connecting section to connect the first connecting section and the wheel hub mounting plate can also effectively save manufacturing materials and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 : Schematic diagram of the rear bearing bridge hub installation structure of the current welding structure;

[0012] Figure 2 : A cross-sectional schematic diagram of a rear bearing bridge hub mounting structure of a current welded structure;

[0013] Figure 3 : A group of pictures showing the welding installation process of connecting the journal and the hub mounting plate in the welded hub mounting structure;

[0014] Figure 3 (a): Schematic diagram of the structure before welding;

[0015] Figure 3 (b): Schematic diagram of the structure after welding;

[0016] Figure 3 (c): Schematic diagram of the structure after the wheel hub is installed with the trigger;

[0017] Figure 3 (d) Schematic diagram of the structure of the assembled brake base plate;

[0018] Figure 4 : Schematic diagram of the rear bearing bridge hub installation structure provided by the utility model;

[0019] Figure 5 : A cross-sectional schematic diagram of the rear load-bearing bridge hub mounting structure provided by the utility model.

[0020] Figure numerals: 1-bearing circular tube; 2-connecting journal; 21-first connecting section; 22-second connecting section; 23-reinforced connecting section; 24-reinforced wing plate; 25-weld; 3-wheel hub mounting plate; 31-mounting hole; 4-brake base plate; 41-bolt; 42-nut. DETAILED DESCRIPTION

[0021] The utility model is further described below.

[0022] The utility model provides a rear bearing bridge hub mounting structure, which is mainly used for the installation of the rear bearing bridge hub, comprising a connecting journal 2 and a hub mounting plate 3 which are sequentially arranged at the end of a bearing circular tube 1, wherein the hub mounting plate 3 is arranged perpendicular to the horizontal plane where the bearing circular tube 1 is located and is higher than the bearing circular tube 1, wherein the hub mounting plate 3 and the connecting journal 2 are integrally formed, wherein the hub mounting plate 3 is provided with a mounting hole 31 for mounting the hub, wherein the connecting journal 2 comprises a first connecting section 21 and a second connecting section 22, wherein the first connecting section 21, the second connecting section 22 and the hub mounting plate 3 are sequentially connected, wherein the first connecting section 21 is arranged at the end of the bearing circular tube 1 along the length extension direction of the bearing circular tube 1, and the second connecting section 22 is obliquely arranged between the first connecting section 21 and the hub mounting plate 3.

[0023] like Figure 4 , Figure 5 As shown, the rear bearing bridge hub mounting structure includes a connecting journal 2 and a hub mounting plate 3 which are sequentially arranged at the end of the bearing circular tube 1. The hub mounting plate 3 is arranged perpendicular to the horizontal plane where the bearing circular tube 1 is located and is higher than the bearing circular tube 1, so as to leave space between the front and rear axles for arranging more batteries. The hub mounting plate 3 and the connecting journal 2 are an integrally formed structure, thereby avoiding the problem of deformation of the hub mounting plate 3 caused by welding heat brought by the welding structure. For ease of manufacturing, the connecting journal 2 includes a first connecting section 21 and a second connecting section 22. The first connecting section 21 is horizontal so as to connect the integrally formed rear bearing bridge The hub mounting structure is connected to the load-bearing circular tube 1 and is arranged at the end of the load-bearing circular tube 1 along the length extension direction of the load-bearing circular tube 1. Specifically, the connection end structure of the first connecting section 21 and the load-bearing circular tube 1 adopts the connection structure between the existing connecting shaft neck 2 and the load-bearing circular tube 1, and the two adopt a clearance fit assembly welding arc connection structure; the second connecting section 22 is inclined to connect the hub mounting plate 3 located at a different height from the load-bearing circular tube 1, and at the same time avoid stress concentration due to multiple bends at the connecting shaft neck 2 after the subsequent installation of the wheel hub, causing damage to the integrally formed connecting shaft neck 2 and the hub mounting plate 3.

[0024] like Figure 2 , Figure 5As shown, the connecting journal 2 is divided into two sections, namely a first connecting section 21 arranged horizontally and a second connecting section 22 arranged obliquely. The connecting journal 2 is connected to the load-bearing circular tube 1 through the first connecting section 21 arranged horizontally, and the second connecting section 22 arranged obliquely is connected to the wheel hub mounting plate 3. The connecting journal 2 including the first connecting section 21 and the second connecting section 22 is made into an integral structure with the wheel hub mounting plate 3, so that the connecting journal 2 and the wheel hub mounting plate 3 do not need to be connected by welding, thereby avoiding the generation of welding heat, that is, the problem of deformation of the wheel hub mounting plate 3 caused by the welding structure will not occur, which is beneficial to the control of product manufacturing quality, reduces the cost of subsequent processes and machining of uneven wheel hub mounting plates 3, and at the same time ensures the flatness of the mounting holes 31 opened on the wheel hub mounting plate 3, so that when the brake base plate 4 of the wheel hub is installed, the bolts 41 and the nuts 42 can fit perfectly, ensuring the stability of the wheel hub installation. ; At the same time, the one-piece wheel hub mounting structure integrates the wheel hub mounting plate 3 and the connecting shaft neck 2, so that the number of parts is reduced, which saves manufacturing costs and can also reduce the weight of the wheel hub mounting structure to meet the requirements of lightweight design; at the same time, the connecting shaft neck 2 including the first connecting section 21 and the second connecting section 22 is used to replace the Z-shaped connecting shaft neck 2 in the original split wheel hub mounting structure, thereby reducing the bending parts of the connecting shaft neck 2, which can not only meet the connection requirements of the wheel hub mounting plate 3 and the load-bearing circular tube 1 located at different heights, but also facilitate the manufacture of the one-piece connecting shaft neck 2 and the wheel hub mounting plate 3, and at the same time avoid the subsequent installation of the wheel hub due to the presence of multiple bends at the connecting shaft neck 2, resulting in stress concentration and damage to the one-piece connecting shaft neck 2 and the wheel hub mounting plate 3; and the use of the inclined second connecting section 22 to connect the first connecting section 21 and the wheel hub mounting plate 3 can also effectively save manufacturing materials and costs.

[0025] Since the second connecting section 22 is tiltedly arranged between the first connecting section 21 and the hub mounting plate 3, in order to ensure the connection strength between the first connecting section 21 and the second connecting section 22, and at the same time ensure the structural strength of the integrally formed hub mounting plate 3 and the connecting journal 2, as shown in FIG. Figure 4As shown, a reinforcing connecting section 23 is provided at the connection between the second connecting section 22 and the first connecting section 21, and the hub mounting plate 3, the second connecting section 22, the reinforcing connecting section 23 and the first connecting section 21 are smoothly transitioned and connected in sequence; and the thickness of the reinforcing connecting section 23 is greater than the wall thickness of the first connecting section 21. When the first connecting section 21 and the second connecting section 22 are connected through the reinforcing connecting section 23, the thickness of the reinforcing connecting section 23 should be uniformly transitioned from greater than the thickness at the first connecting section 21 to the thickness at the second connecting section 22, so as to ensure the connection between the horizontally arranged first connecting section 21 and the inclinedly arranged second connecting section 22 Strength, and the reinforced connecting section 23 is arc-shaped, so that the first connecting section 21 and the second connecting section 22 have a smooth transition, and then the hub mounting plate 3, the second connecting section 22, the reinforced connecting section 23 and the first connecting section 21 are smoothly connected in sequence, so that each connection can have a smooth transition. After the hub is installed, the pressure can be evenly transferred to the load-bearing circular tube 1 through the hub mounting plate 3, and stress concentration will not occur at the bend, causing the integrally formed hub mounting plate 3 and the connecting shaft neck 2 to break at the bend, thereby ensuring the structural strength of the integrally formed connecting shaft neck 2 and the hub mounting plate 3, and ensuring its safety during use. Furthermore, in order to ensure the supporting effect of the second connecting section 22 on the hub mounting plate 3, as Figure 4 As shown, the outer surface of the second connecting section 22 is arc-shaped; the outer surface of the second connecting section 22 is set to an arc shape, so that the outer surfaces of the hub mounting plate 3, the second connecting section 22, the reinforced connecting section 23 and the first connecting section 21 can form a streamlined shape, that is, a smooth and regular surface without sharp edges and corners, to avoid stress concentration at the bending part after the hub is installed, resulting in a break in the connection between the connecting shaft neck 2 and the hub mounting plate 3, thereby improving the structural strength of the rear load-bearing bridge hub mounting structure and extending its service life.

[0026] In order to reduce the weight of the rear bearing bridge hub mounting structure and achieve the purpose of lightweight design, the connecting journal 2 is a hollow structure. It should be noted that when the hub mounting plate 3 and the connecting journal 2 are integrally formed, the wall thickness of the connecting journal 2 needs to be controlled to be 10.5 mm to ensure its strength so that the rear bearing bridge hub mounting structure will not be deformed or broken during use; in order to strengthen the connection strength between the connecting journal 2 with a hollow structure and the hub mounting plate 3, as shown in FIG. Figure 4 As shown, both sides of the second connecting section 22 are respectively provided with reinforcing wing plates 24 integrally formed with the connecting shaft neck 2, and the reinforcing wing plates 24 are triangular in shape, one side of which is connected to the hub mounting plate 3, and the other side is connected to the second connecting section 22; by setting the reinforcing wing plates 24 to be a triangle, two sides of the triangle are respectively connected to the outer side of the second connecting section 22 and the hub mounting plate 3, so that the reinforcing wing plates 24 assist the connecting shaft neck 2 in supporting the hub mounting plate 3, and at the same time ensure the connection strength between the connecting shaft neck 2 and the hub mounting plate 3.

[0027] In order to ensure the structural strength of the integrally formed wheel hub mounting plate 3 and the connecting shaft neck 2 and to ensure the inclined setting of the second connecting section 22, the wheel hub mounting plate 3 and the connecting shaft neck 2 are forged integral structures; the forging manufacturing method can achieve a smooth transition connection between the wheel hub mounting plate 3, the second connecting section 22, the reinforced connecting section 23, and the first connecting section 21, and at the same time, the outer surface of the second connecting section 22 can be made into an arc shape, ensuring that the integrally formed wheel hub mounting plate 3 and the connecting shaft neck 2 can be streamlined to avoid stress concentration, and make the connecting shaft neck 2 better support the wheel hub mounting plate 3, thereby improving the strength of the rear load-bearing bridge wheel hub mounting structure and extending its service life.

Claims

1. A rear bearing bridge hub mounting structure, comprising a connecting journal (2) and a hub mounting plate (3) sequentially arranged at the end of a bearing circular tube (1), wherein the hub mounting plate (3) is arranged perpendicular to the horizontal plane where the bearing circular tube (1) is located and is higher than the bearing circular tube (1), Features: The wheel hub mounting plate (3) and the connecting shaft neck (2) are integrally formed; the wheel hub mounting plate (3) is provided with a mounting hole (31) for mounting the wheel hub; the connecting shaft neck (2) comprises a first connecting section (21) and a second connecting section (22); the first connecting section (21), the second connecting section (22) and the wheel hub mounting plate (3) are connected in sequence; the first connecting section (21) is arranged at the end of the load-bearing circular tube (1) along the length extension direction of the load-bearing circular tube (1); the second connecting section (22) is arranged obliquely between the first connecting section (21) and the wheel hub mounting plate (3).

2. A rear bearing bridge hub mounting structure as claimed in claim 1, Features: A reinforcing connecting section (23) is provided at the connection between the second connecting section (22) and the first connecting section (21); the hub mounting plate (3), the second connecting section (22), the reinforcing connecting section (23) and the first connecting section (21) are connected in a smooth transition sequence.

3. A rear bearing bridge hub mounting structure as claimed in claim 2, Features: The outer surface of the second connecting section (22) is arc-shaped.

4. A rear bearing bridge hub mounting structure as claimed in claim 1, Features: The connecting journal (2) is a hollow structure.

5. A rear bearing bridge hub mounting structure as claimed in claim 4, Features: The second connecting section (22) is provided with reinforcing wing plates (24) formed integrally with the connecting journal (2) on both sides, and the reinforcing wing plates (24) are triangular in shape, with one side connected to the wheel hub mounting plate (3) and the other side connected to the second connecting section (22).

6. A rear bearing bridge hub mounting structure according to any one of claims 1 to 5, Features: The wheel hub mounting plate (3) and the connecting shaft journal (2) are an integrated structure formed by forging.

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