Automobile rear axle tube structure

Abstract

The utility model provides an automobile rear axle tube structure, which relates to the technical field of automobile accessories and comprises a tube body, a flange plate and a plate spring seat are respectively sleeved at two ends of the tube body, inner welding rings are annularly distributed on the inner side between the tube body and the flange plate, and the tube body is fixedly welded with the flange plate. A main bonding pad and a branch bonding pad are annularly distributed on the inner side of the plate spring seat along the pipe wall of the pipe body, and the main bonding pad and the branch bonding pad are welded to the pipe body; compared with the existing bridge tube assembly structure, the bridge tube assembly structure has the beneficial effects that the bonding pad structures matched with the axial surface of the bridge tube are oppositely arranged in the bridge tube assembly structure, and the internal welding space reserved on the welding surface of the bridge tube assembly structure can provide convenience for subsequent assembly and fixation; meanwhile, the inner welding ring serves as the welding face of the flange plate and the pipe body so as to reinforce the radial force generated after the flange plate and the pipe body are combined, and the reliability of the whole bridge pipe structure is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, and relates to a bridge tube structure of an automobile rear axle. Background Art

[0002] The rear axle of a car is the component of the rear drive shaft for transmitting power to the vehicle. It consists of two half-bridges, which can implement half-bridge differential movement. It is also a device used to support the wheels and connect the rear wheels. The bridge tube is usually integrated with the rear axle housing to fix the axial relative position of the left and right drive wheels, and together support the frame and the mass of the various assemblies thereon. At the same time, it withstands the road reaction force and torque transmitted from the wheels when the car is driving, and transmits them to the frame through the suspension.

[0003] The combination of the bridge tube is usually assembled and fixed with the leaf spring by welding, and is axially fixed by flange docking at the plate-bridge combination. The existing bridge tube assembly structure is usually welded and fixed along the seam surface after assembly. In actual application, the radial external force is easy to affect the inner side of the weld at the bridge tube assembly, that is, fracture, cracks and other adverse phenomena occur, which greatly limits the reliability of the bridge tube. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, a rear axle tube structure of an automobile is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means:

[0006] A rear axle bridge tube structure of an automobile comprises a tube body, flanges and leaf spring seats are respectively sleeved at both ends of the tube body, inner welding rings are distributed in an annular manner inside the tube body and the flange, and the tube body and the flange are welded and fixed;

[0007] A main welding pad and a branch welding pad are distributed in an annular manner along the tube wall of the tube body on the inner side of the leaf spring seat, and both the main welding pad and the branch welding pad are welded to the tube body.

[0008] Furthermore, the inner welding ring is axially symmetrically distributed, and the radial reinforcement force of the inner welding ring relative to the tube body is at least 1250N.

[0009] Furthermore, the main pad is in a concave structure relative to the outer wall of the tube body, and the arc angle of the main pad is at least 50°.

[0010] Furthermore, the support pad is in a concave structure relative to the outer wall of the tube body, and the arc angle of the support pad is at least 25°.

[0011] Furthermore, waist-shaped bolts are provided through both ends of the leaf spring seat, and the waist-shaped bolts protrude toward the end of the leaf spring seat to form convex sections, and the convex sections are clamped and fixed to the leaf spring seat.

[0012] Furthermore, the convex section is welded to the tube body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Compared with the existing bridge tube assembly structure, this automobile rear axle bridge tube structure has a welding pad structure that matches the bridge tube axial surface. The inner welding space reserved on its welding surface can facilitate subsequent assembly and fixation, and cooperate with the welding pad structure to further strengthen the radial and axial strength of the weld between the bridge tube and the leaf spring seat and the welding surface. At the same time, the inner welding ring is used as the welding surface between the flange and the tube body to strengthen the radial force after the flange and the tube body are combined, thereby further improving the reliability of the entire bridge tube structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal planar structure of the tube body and the leaf spring seat of the utility model;

[0017] Figure 3 This is a schematic diagram of the waist-shaped bolt structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the internal planar structure of the flange and the pipe body of the utility model.

[0019] Markings in the figure: 1-tube body; 2-flange; 3-leaf spring seat; 4-waist-shaped bolt; 5-main welding pad; 6-branch welding pad; 7-convex section; 8-inner welding ring. DETAILED DESCRIPTION

[0020] See also Figure 1-4 , the embodiments of the utility model are further described;

[0021] A rear axle bridge tube structure of an automobile comprises a tube body 1, flanges 2 and leaf spring seats 3 are respectively sleeved at both ends of the tube body 1, an inner welding ring 8 is annularly distributed inside the tube body 1 and the flange 2, and the tube body 1 and the flange 2 are welded and fixed;

[0022] A main welding pad 5 and a branch welding pad 6 are distributed in a ring shape along the tube wall of the tube body 1 on the inner side of the leaf spring seat 3 , and both the main welding pad 5 and the branch welding pad 6 are welded to the tube body 1 .

[0023] The bridge tube structure uses flanges 2 and leaf spring seats 3 distributed at both ends of the tube body 1 as the butt ends of the bridge tube structure. The bridge tube is axially butted and fixed with the rear axle bridge housing plate bridge through bolt holes opened on the surface of the flange 2. The other end uses the leaf spring seat 3 as the connection end between the bridge tube structure and the rear axle leaf spring of the automobile. When the bridge tube is assembled and installed, Figure 4As shown, the pipe body 1 and the flange 2 are further welded and fixed in the weld by an inner welding ring 8, so as to provide radial force to the pipe body 1 through the flange 2 structure, and strengthen the connection between the pipe body 1 and the flange 2. Figure 2 As shown, the tube body 1 and the leaf spring seat 3 use the relatively distributed main welding pads 5 and the branch welding pads 6 as the inner welding surface structure of the weld to further butt the combination of the tube body 1 and the leaf spring seat 3;

[0024] Compared with the existing bridge tube structure, the bridge tube realizes axial and radial reinforcement of the entire bridge tube structure by welding the combined tube body 1, flange 2 and leaf spring seat 3 inside and outside to improve the strength of the bridge tube during butt assembly.

[0025] Preferably, the inner welding ring 8 is axially symmetrically distributed, and the radial reinforcement force of the inner welding ring 8 relative to the tube body 1 is at least 1250N. The multiple inner welding rings 8 distributed axially on multiple surfaces reduce the actual circular diameter of the actual inner welding surface operation while ensuring the welding strength, thereby ensuring the radial reinforcement force after the axial center of the tube body 1 and the flange 2 structure are combined.

[0026] Preferably, the main welding pad 5 has a concave structure relative to the outer tube wall of the tube body 1, and the arc angle of the main welding pad 5 is at least 50°. The concave structure provides welding space for the main welding pad 5 and the inner welding surface of the tube body 1. At the same time, the structure of the main welding pad 5 ensures the connectivity between its welding surface and the leaf spring seat 3. The relative arc angle of the main welding pad 5 forms a contact area with a certain axial angle with the surrounding structure of the leaf spring seat 3 to ensure the combined strength of the entire main welding pad 5 and the tube body 1 after welding.

[0027] Preferably, the support pad 6 is concave relative to the outer wall of the tube body 1, and the arc angle of the support pad 6 is at least 25°. The concave structure provides a welding space for the support pad 6 and the inner welding surface of the tube body 1, and at the same time, the support pad 6 structure ensures the connectivity between its welding surface and the leaf spring seat 3. Figure 2 As shown, the arc angle of the support pad 6 relative to the main pad 5 forms a contact area with a certain axial angle with the surrounding structure of the leaf spring seat 3, so as to ensure the combined strength of the entire main pad 5 and the tube body 1 after welding, and at the same time ensure that the bridge tube body 1 is lower than the upper end surface of the leaf spring seat 3 after welding.

[0028] Preferably, waist-shaped bolts 4 are provided at both ends of the leaf spring seat 3, and the waist-shaped bolts 4 protrude toward the end of the leaf spring seat 3 to form a convex section 7, and the convex section 7 is clamped and fixed to the leaf spring seat 3, and the waist-shaped bolt 5 is fixed to the leaf spring seat 3 in a compressed manner through the convex section 7, and the overall pull-out force of the convex section 7 and the waist-shaped bolt 4 is greater than 500N, so as to ensure the docking reliability when the leaf spring seat 3 is docked with the leaf spring.

[0029] On the basis of the above, the cross-section of the convex section 7 is welded to the tube body 1. Relative to the combination of the waist-shaped bolt 4 and the leaf spring seat 3, the convex section 7 and the tube body 1 are further welded and combined along the outer weld of the leaf spring seat 3 to reinforce the waist-shaped bolt 4 through the bridge tube 1 structure, that is, to reinforce the butt end of the leaf spring seat 3.

[0030] The implementation method of the device is to pre-fix by sleeve-mounting the combined pipe body 1 and the flange 2, and weld and assemble them along the inner welding ring 8 between the combined part of the pipe body 1 and the flange 2, and then weld along the outer gap connecting the pipe body 1 and the flange 2, and then pre-fix by sleeve-mounting the combined pipe body 1 and the leaf spring seat 3, and weld and fix them along the inner welding surfaces of the main welding pad 5 and the support welding pad 6 left between the pipe body 1 and the leaf spring seat 3, and finally perform external welding along the connecting gap between the pipe body 1 and the leaf spring seat 3. During installation, the end of the flange 2 is used as the axial connecting end of the pipe body 1 and the rear axle flange, and the waist-shaped bolt 4 protruding outward from the leaf spring seat 3 is used as the butt end with the leaf spring.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A rear axle bridge tube structure of an automobile, characterized in that: It comprises a tube body (1), the two ends of the tube body (1) are respectively sleeved with a flange (2) and a leaf spring seat (3), an inner welding ring (8) is distributed in an annular manner on the inner side between the tube body (1) and the flange (2), and the tube body (1) and the flange (2) are fixed by welding; A main welding pad (5) and a branch welding pad (6) are distributed in an annular manner along the wall of the tube body (1) on the inner side of the leaf spring seat (3), and both the main welding pad (5) and the branch welding pad (6) are welded to the tube body (1).

2. The automobile rear axle bridge tube structure according to claim 1, characterized in that: The inner welding ring (8) is distributed axially symmetrically, and the radial reinforcement force of the inner welding ring (8) relative to the pipe body (1) is at least 1250N.

3. The automobile rear axle bridge tube structure according to claim 1, characterized in that: The main soldering pad (5) is in a concave structure relative to the outer wall of the tube body (1), and the arc angle of the main soldering pad (5) is at least 50°.

4. The automobile rear axle bridge tube structure according to claim 1, characterized in that: The support welding pad (6) is in a concave structure relative to the outer wall of the tube body (1), and the arc angle of the support welding pad (6) is at least 25°.

5. The automobile rear axle bridge tube structure according to claim 1, characterized in that: The leaf spring seat (3) is provided with waist-shaped bolts (4) at both ends thereof, the waist-shaped bolts (4) protrude toward the end of the leaf spring seat (3) to form convex sections (7), and the convex sections (7) are fixedly connected to the leaf spring seat (3) by clamping.

6. The automobile rear axle bridge tube structure according to claim 5, characterized in that: The convex section (7) is welded to the tube body (1).

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