Axle housing of drive axle, drive axle and vehicle

Abstract

The utility model relates to an axle housing of a drive axle, the drive axle and a vehicle, and the axle housing of the drive axle comprises a housing part and a triangular plate; the shell part comprises two shell bodies, the shell bodies are stamping parts, the two shell bodies are correspondingly provided with concave parts respectively, and after the two shell bodies are welded and fixed, a hollow part can be defined through the corresponding concave parts; the inner contour of the concave part comprises two straight line sections and an arc section connected between the two straight line sections, the arc section is tangent to the two straight line sections, the corresponding straight line sections of the two shells form a V-shaped notch, a triangular plate is fixedly arranged in the V-shaped notch, and an arc-shaped groove is formed in the side wall, away from the V-shaped notch, of the triangular plate; the arc-shaped groove and the arc section are located on the same reference circle and define a center hole. By optimizing the structure of the axle housing of the drive axle, the material utilization rate is increased, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a bridge housing of a drive axle, a drive axle and a vehicle. Background Art

[0002] The punched and welded bridge housing of the automobile drive axle mainly includes two shells, the upper shell and the lower shell. The upper shell and the lower shell are mainly formed by a stamping process and fixed by welding. Some drive axles also include a triangular plate. The setting of the triangular plate can improve the material utilization rate of the bridge housing stamping.

[0003] The shell is formed by stamping out plate parts. Since the shell needs to be provided with an overlapping portion for joining and welding with the triangular plate, the plate part includes a rectangular plate and a protruding structure in the unfolded state. The protruding structure is stamped to form an overlapping portion. The protruding structure can increase the overall width of the plate part. The larger the width of the protruding structure is, the more waste materials will be generated when the plate part is formed by stamping out the plate part, the lower the material utilization rate will be, and the higher the cost will be.

[0004] Therefore, how to improve the material utilization rate of the axle housing of the drive axle and reduce the cost is a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0005] The purpose of the present application is to provide a drive axle housing, a drive axle and a vehicle, which optimize the structure of the drive axle housing, improve material utilization and reduce costs.

[0006] In order to solve the above-mentioned technical problems, the present application provides a bridge housing of a drive axle, including a shell part and a triangular plate; the shell part includes two shells, the shells are stamped parts, and the two shells are respectively provided with recesses, and the two shells can be welded and fixed to form a hollow part by the corresponding recesses; the internal contour of the recess includes two straight line segments and an arc segment connected between the two straight line segments, the arc segment is tangent to the two straight line segments respectively, and the straight line segments corresponding to the two shells form a V-shaped notch, and the triangular plate is fixed in the V-shaped notch, and a circular arc groove is provided on one side wall of the triangular plate away from the V-shaped notch, and the circular arc groove and the circular arc segment are on the same pitch circle and enclose a center hole.

[0007] The housing is a stamped part, and the concave part and the extension part are formed by stamping a plate through a stamping die. The plate includes a rectangular plate, and the two sides of the rectangular plate in the width direction are respectively provided with a convex structure. After stamping, the convex structure can form a lap joint. The plate is formed by stamping and blanking a plate, and the length of the plate is the same as the length of the plate, and the width of the plate is the same as the maximum width of the plate.

[0008] The larger the size of the raised structure extending to both sides along the width direction of the rectangular plate, the larger the maximum width of the plate. However, only the parts of the raised structure on both sides of the plate are utilized, and the rest of the parts need to be removed. Therefore, the smaller the size of the raised structure extending to both sides along the width direction of the rectangular plate, the less material will be dropped and the higher the utilization rate of the plate.

[0009] Making the arc segment tangent to the two straight line segments respectively will increase the length of the straight line segments and greatly reduce the width of the overlapping portion. The reduced width of the overlapping portion will cause the raised structure of the plate used before stamping to be correspondingly reduced, resulting in less material falling during stamping, thereby improving the utilization rate of the plate.

[0010] Optionally, the cross-section of the recess is a U-shaped structure, a side wall of the U-shaped structure forms an overlapping portion toward one side of the opening, an edge of the overlapping portion forms the straight line segment, and a width of the overlapping portion is 2 mm.

[0011] Optionally, the side wall of the triangular plate is joined to and fixed by welding to the straight line segment, and an extension line of the side wall of the triangular plate is tangent to the center hole.

[0012] Optionally, the end of the V-shaped notch forms an angle end, and the corner of the triangular plate corresponds to the angle end and is fixed by welding.

[0013] Optionally, the outer edge of the corner portion and the inner edge of the corner end are both in arc-shaped structures that fit each other.

[0014] Optionally, the outer edge of the corner portion and the inner edge of the corner end are both pointed angle structures that match each other.

[0015] Optionally, the outer edge of the corner is an arc-shaped structure, the inner edge of the corner end is a pointed structure, and a gap is formed between the corner and the corner end; the bridge housing also includes a baffle, which is relatively fixed to the triangular plate and covers the gap.

[0016] Optionally, the baffle is fixedly arranged on a side of the triangular plate facing the inside of the shell.

[0017] The present application also provides a drive axle, characterized in that it includes a main reducer and the axle housing as described above, wherein the center hole is provided with mounting holes along the circumferential direction and is used for fixing with the main reducer.

[0018] The present application also provides a vehicle, comprising the drive axle as described above.

[0019] The technical effects of the drive axle with the axle housing as described above, and the vehicle with the drive axle as described above, are similar to the technical effects of the axle housing of the above-mentioned drive axle, and will not be described in detail here to save space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an axle housing of a drive axle provided in an embodiment of the present application;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle shell;

[0022] Figure 3 yes Figure 2 A schematic diagram of the structure of the shell;

[0023] Figure 4 It is a schematic diagram of the weld arrangement of the axle housing of the drive axle;

[0024] Figure 5 It is a schematic diagram of the structure of the panel in the unfolded state;

[0025] Figure 6 It is a structural diagram of a triangle plate.

[0026] Attached Figure 1-Figure 6 In the figure, the reference numerals are described as follows:

[0027] 1 shell portion, 11 housing, 12 recessed portion, 121 arc segment, 122 straight segment, 13 extension portion, 14 overlap portion;

[0028] 2 triangle plate, 21 corner portion, 22 arc-shaped groove;

[0029] 3 hollow part, 31 V-shaped notch, 32 corner end;

[0030] 4 center holes;

[0031] 5 plate member, 51 rectangular plate, 52 raised structure;

[0032] 6 baffles. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The embodiment of the present application provides a drive axle housing, a drive axle and a vehicle, wherein the vehicle includes a drive axle, which refers to the rear drive shaft component of the vehicle power transmission, and can implement half-bridge differential movement. At the same time, the drive axle is also a device for supporting wheels and connecting rear wheels. If it is a front-axle driven vehicle, then the rear axle is just a follower axle and only plays a bearing role. If the front axle is not a drive axle, then the rear axle is a drive axle, and in this case, in addition to the bearing role, it also plays the role of driving, deceleration and differential.

[0035] The drive axle includes the bridge housing, main reducer, half-axles and other components. The bridge housing is the assembly base for the main reducer, differential, half-axles and wheels. Its main function is to support and protect the main reducer, differential and half-axles, etc., and it needs to have sufficient strength and rigidity.

[0036] like Figure 1 and Figure 2 As shown, the axle housing of the drive axle provided in this embodiment includes two housings 11, both of which are stamping parts, which can simplify the molding process and improve production efficiency. Specifically, the recess 12 is formed by stamping, and after the two housings 11 are fixed by butt welding, the corresponding recesses 12 can be used to enclose a hollow part 3, and the hollow part 3 includes a center hole 4 and V-shaped notches 31 located on both sides of the center hole 4, and each V-shaped notch 31 is fixed with a triangular plate 2.

[0037] like Figure 3 As shown, the inner contour of the recess 12 includes two straight segments 122 and an arc segment 121 connected between the two straight segments 122. The side of the triangular plate 2 is welded to the straight segment 122, and a side of the triangular plate 2 away from the V-shaped notch 31 is provided with an arc groove 22 (such as Figure 6 As shown), the arc-shaped groove 22 is concentric with the arc segment 121 and is arranged on the same pitch circle. The arc-shaped grooves 22 of the two triangular plates 2 and the two arc segments 121 can enclose to form the above-mentioned center hole 4.

[0038] The shell 11 is a stamped part, and specifically, a plate 5 is stamped out through a stamping die to form a recess 12 and an extension 13. An extension 13 is respectively provided on both sides of the opening end of the recess 12. The two shells 11 are butt-jointed and welded together through the extension 13. The cross-section of the shell 11 is a U-shaped structure. The two shells 11 are butt-jointed and welded together through the side walls of the U-shaped structure at the extension 13. The side wall of the U-shaped structure at the recess 12 forms a lap joint 14 toward the side of the opening. The edge of the lap joint 14 forms the above-mentioned straight line segment 122, and is used to be welded and fixed with the triangular plate 2. That is to say, four triangular plates 2 are fixed between the two shells 11, and the side edges of each triangular plate 2 are butt-jointed and welded together with the corresponding straight line segment 122, with a total of eight welds.

[0039] like Figure 4 As shown, the thick black line shows the weld on one side of the bridge housing, including the weld between the extensions 13 of the two housings 11 and the weld between the triangular plate 2 and the straight section 122 .

[0040] Figure 5 The structure shown by the solid line is a plate 5 , which includes a rectangular plate 51 . Both sides of the rectangular plate 51 in the width direction are provided with protruding structures 52 . After stamping, the protruding structures 52 can form overlapping portions 14 . Figure 5The structure shown by the dotted line is a plate, and the plate 5 is formed by stamping and blanking the plate. The length of the plate is the same as the length of the plate 5, both are L, and the width of the plate is the same as the maximum width W of the plate 5.

[0041] The larger the size of the raised structure 52 extending to both sides along the width direction of the rectangular plate 51, the larger the maximum width W of the plate 5 will be. However, only the parts of the raised structure 52 on both sides of the plate are utilized, and the remaining parts need to be removed. Therefore, the smaller the size of the raised structure 52 extending to both sides along the width direction of the rectangular plate 51, the less material will be dropped and the higher the utilization rate of the plate will be.

[0042] The bridge housing of the drive axle provided in the present embodiment has no change in the outer contour of the housing 11, and the arc segment 121 is tangent to the two straight line segments 122 respectively, which will increase the length of the straight line segment 122 and greatly reduce the width of the overlapping portion 14. The reduction in the width of the overlapping portion 14 will cause the raised structure 52 of the plate 5 used before stamping to be correspondingly reduced, resulting in less material falling during stamping, thereby improving the utilization rate of the plate.

[0043] like Figure 1 As shown, the side of the triangle plate 2 is joined with the straight line segment 122 and welded and fixed, the extension line of the side of the triangle plate 2 is tangent to the center hole 4, and the length of the triangle plate 2 is also increased compared with the length of the triangle plate 2 in the prior art. Since the triangle plate 2 is designed to be joined with the straight line segment 122, the increase in the length and area of ​​the triangle plate 2 will result in a decrease in the area of ​​the overlap portion 14 and a decrease in the protruding structure 52, which is conducive to improving the utilization rate of the plate.

[0044] In this embodiment, the width of the overlapping portion 14 is 2 mm. Compared with the prior art, in which the straight line segment 122 is not tangent to the arc segment 121, the minimum margin of the overlapping portion 14 is 4.5 mm on a single side. After the straight line segment 122 is tangent to the arc segment 121, the width of the overlapping portion 14 can be effectively reduced, thereby reducing the size of the protruding structure 52. The material utilization rate can reach 85%, effectively reducing the cost.

[0045] The side wall of the U-shaped structure is provided with mounting holes along the circumference of the central hole 4 for mounting the rear cover and the main reducer.

[0046] like Figure 2 As shown, the end of the V-shaped notch 31 (i.e., the end on one side away from the center hole 4) forms an angle end 32, and the corner 21 of the triangle plate 2 corresponds to the angle end 32. After the triangle plate 2 is welded and fixed to the shell 1, the angle end 32 can be blocked to prevent welding slag from falling into the shell 1 during the welding operation, thereby ensuring the cleanliness of the shell 1.

[0047] Since the extension parts 13 of the two shells 11 are fixed by butt welding, the inner edge of the corner end 32 is a pointed structure, which refers to a V-shaped structure. The side walls are all straight structures, and the triangle plate 2 is formed by stamping, and the outer edge of the corner 21 is an arc structure. In order to ensure that the V-shaped notch 31 can be blocked after the triangle plate 2 is fixed, the following three implementation schemes can be used.

[0048] In the first implementation scheme, after the two shells 11 are welded and fixed, the side wall of the corner end 32 of the shell 1 is machined to form an arc structure that matches the corner 21 of the triangle plate 2, or the side wall end position of the opening end of the recess 12 of the shell 11 is first machined to form an arc structure that matches the edge of the corner 21. After the two shells 11 are welded and fixed, a corner end 32 that matches the corner 21 can be formed. After the triangle plate 2 and the shell 1 are welded and fixed, the corner 21 can just match the corner end 32 to block the V-shaped notch 31.

[0049] In the second implementation scheme, after the triangle plate 2 is stamped and formed, the edge of the corner 21 is machined to form a straight structure, so that the outer edge of the corner 21 forms a sharp angle structure that matches the side wall of the corner end 32. After the triangle plate 2 is welded and fixed to the shell 1, the corner 21 can just match the corner end 32 to seal the V-shaped notch 31.

[0050] In the third implementation scheme, the shell 11 and the triangular plate 2 are both formed by stamping without mechanical processing. After the triangular plate 2 is welded and fixed to the shell 1, a gap can be formed between the corner 21 and the corner end 32, and the gap is blocked by a separately arranged baffle 6. Specifically, the baffle 6 is located inside the shell 1, that is, on one side of the U-shaped structure.

[0051] In the above three implementation schemes, the material utilization rate is relatively high and the welding slag can be prevented from falling into the shell 1 along the gap.

[0052] Moreover, in the third implementation scheme, since no machining operation is required, the forming process can be simplified, production efficiency can be improved, and costs can be reduced. In addition, when the width of the overlap portion 14 is smaller, it is easier to form a larger gap between the corner 21 and the corner end 32, which increases the difficulty of welding. By shielding the gap with the baffle 6, compared with welding the corner end 32 with a sharp angle structure and the corner 21, or welding the corner end 32 with a rounded angle structure and the corner 21, the processing technology can be simplified, the welding difficulty can be reduced, and welding quality problems can be avoided.

[0053] Specifically, in this embodiment, there is no restriction on the fixing of the baffle 6. For example, the baffle 6 can be fixed to the inner side wall of the triangular plate 2 (such as Figure 6As shown), the baffle plate 6 can also be fixed to the inner wall of the shell 11 (ie, the inner wall of the U-shaped structure), and when the baffle plate 6 is welded and fixed to the inner wall of the triangle plate 2, the welding operation is convenient.

[0054] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A bridge housing of a drive axle, characterized in that: It comprises a shell (1) and a triangular plate (2); The shell portion (1) comprises two shells (11), the shells (11) being stamped parts, the two shells (11) being respectively provided with corresponding recesses (12), and the two shells (11) being welded and fixed to each other so as to enclose a hollow portion (3) through the corresponding recesses (12); The inner contour of the recess (12) comprises two straight line segments (122) and an arc segment (121) connected between the two straight line segments (122); the arc segment (121) is tangent to the two straight line segments (122) respectively; the straight line segments (122) corresponding to the two shells (11) form a V-shaped notch (31); the triangular plate (2) is fixedly arranged in the V-shaped notch (31); a side wall of the triangular plate (2) away from the V-shaped notch (31) is provided with an arc groove (22); the arc groove (22) and the arc segment (121) are on the same pitch circle and enclose a central hole (4).

2. The axle housing of the drive axle according to claim 1, characterized in that: The side edge of the triangular plate (2) is joined to and fixedly welded to the straight line segment (122), and the extension line of the side edge of the triangular plate (2) is tangent to the central hole (4).

3. The axle housing of the drive axle according to claim 1, characterized in that: The cross section of the recess (12) is a U-shaped structure, the side wall of the U-shaped structure forms an overlapped portion towards one side of the opening, the edge of the overlapped portion forms the straight line segment (122), and the width of the overlapped portion is 2 mm.

4. The axle housing of the drive axle according to any one of claims 1 to 3, characterized in that: The end of the V-shaped notch (31) forms an angle end (32), and the corner (21) of the triangular plate (2) corresponds to the angle end (32) and is fixed by welding.

5. The axle housing of the drive axle according to claim 4, characterized in that: The outer edge of the corner portion (21) and the inner edge of the corner end (32) are both in an arc-shaped structure that fits each other.

6. The axle housing of the drive axle according to claim 4, characterized in that: The outer edge of the corner portion (21) and the inner edge of the corner end (32) are both sharp-angle structures that fit each other.

7. The axle housing of the drive axle according to claim 4, characterized in that: The outer edge of the corner portion (21) is in an arc-shaped structure, the inner edge of the corner end (32) is in a pointed structure, and a gap is formed between the corner portion (21) and the corner end (32); The bridge housing further comprises a baffle (6), wherein the baffle (6) is fixed relative to the triangular plate (2) and covers the gap.

8. The axle housing of the drive axle according to claim 7, characterized in that: The baffle (6) is fixedly arranged on a side of the triangular plate (2) facing the inside of the shell (1).

9. A drive axle, characterized in that: It comprises a main reducer and a bridge housing as claimed in any one of claims 1 to 8, wherein the center hole (4) is provided with mounting holes along the circumferential direction and is used for fixing to the main reducer.

10. A vehicle, characterized in that: Comprising the drive axle as claimed in claim 9.

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