A skateboard chassis support and method of processing the same

Abstract

The application relates to the product manufacturing field and particularly relates to a skateboard chassis support and a processing method thereof. The skateboard chassis support comprises a first longitudinal beam, a second longitudinal beam, a first cross beam, a second cross beam, a support and a swing arm. Two groups of supports are arranged on the upper surfaces of the first longitudinal beam and the second longitudinal beam, the lower bottom of each support is provided with a turn-up edge, the turn-up edge is provided with a first core-pulling rivet hole, the upper surfaces of the first longitudinal beam and the second longitudinal beam are provided with second core-pulling rivet holes, a rivet passes through the first core-pulling rivet hole and the second core-pulling rivet hole to connect the turn-up edge with the first longitudinal beam / second longitudinal beam, a side wall, which is perpendicular to the turn-up edge, of the support is provided with a first bolt hole, and one end of the swing arm is screwed with the support through the first bolt hole. The skateboard chassis support has high positioning precision, does not depend on manual operation and is not prone to deformation after welding.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of product manufacturing, and particularly relates to a skateboard chassis support and a processing method thereof. BACKGROUND

[0002] The skateboard chassis is a type of chassis specially designed for electric vehicles, which has the advantages of low center of gravity, low aerodynamic resistance and better vehicle stability, can effectively shorten the development cycle of the whole vehicle, and is more suitable for platform production. The main body of the skateboard chassis of the electric vehicle is made of 6-series aluminum alloy extruded profiles, the front and rear bumpers are mainly made of 7-series aluminum alloy sheet stamping, the wheel covers are mainly integrally formed by die casting, and some products are made of aluminum alloy sheet and profile splicing. The product connection mode has welding, screwing and other connection modes. Among them, welding is the main connection mode, and screwing is mainly used for the connection of the subframe, the battery tray and the lower vehicle body assembly. The skateboard chassis of the electric vehicle is provided with a plurality of installation supports, including swing arm installation supports and pull rod installation supports. The installation supports are mainly made of sheet stamping and are welded with the chassis main body cross beam and longitudinal beam. The positioning mode of the installation support on the skateboard chassis of the electric vehicle adopts edge positioning, that is, the edge distance and the up-down distance of the connecting piece are measured and positioned, the positioning accuracy is low, depends on the proficiency of the operator, increases the uncertainty factor, and the production efficiency is low. The positioning mode of the installation support on the skateboard chassis of the electric vehicle adopts a tooling position, which increases the difficulty of tooling design and manufacturing. SUMMARY

[0003] The present application solves the technical problems of low positioning accuracy of the skateboard chassis support, dependence on manual operation and post-welding support deformation.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a skateboard chassis support, which comprises a first longitudinal beam (1), a second longitudinal beam (2), a first cross beam (3), a second cross beam (4), a support (5) and a swing arm (6).

[0005] The first cross beam (3) and the second cross beam (4) are arranged in parallel.

[0006] One end of each of the first cross beam (3) and the second cross beam (4) is welded with the first longitudinal beam (1).

[0007] The other end of each of the first cross beam (3) and the second cross beam (4) is welded with the second longitudinal beam (2).

[0008] The upper surfaces of the first longitudinal beam (1) and the second longitudinal beam (2) are each provided with two groups of supports (5), the lower bottom of each support (5) is provided with a flange (53), and the flange (53) is provided with a first self-drilling rivet hole (51).

[0009] The upper surfaces of the first longitudinal beam (1) and the second longitudinal beam (2) are each provided with a second self-drilling rivet hole (11).

[0010] The rivet passes through the first pop rivet hole (51) and the second pop rivet hole (11) to connect the flange (53) to the first longitudinal beam (1) / second longitudinal beam (2);

[0011] In the bracket, a first bolt hole (52) is provided on the side wall perpendicular to the flange, and one end of the swing arm (6) is screwed to the bracket (5) through the first bolt hole (52);

[0012] Both the first and second crossbeams are square tubular structures. When the first and second crossbeams are welded to the longitudinal beams, there are four welds: two butt welds at the top and bottom ends of the crossbeams, and two vertical welds at the left and right ends of the crossbeams. The butt welds are horizontal in length, and the vertical welds are vertical in length.

[0013] The two vertical joints are the inner vertical joint (7) and the outer vertical joint (8);

[0014] Two sets of horizontal beams and two sets of vertical beams form a closed structure. Among the two sets of vertical joints at the ends of the horizontal beams, the one closer to the center of the closed structure is the inner vertical joint.

[0015] A second aspect of the present invention provides a method for processing the above-mentioned skateboard chassis bracket, wherein the processing method includes:

[0016] The first core-pulling rivet hole and the first bolt hole on the S1 machining bracket, as well as the second core-pulling rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam.

[0017] S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing a pop rivet through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam.

[0018] S3 welds the flange of the bracket to the first longitudinal beam / second longitudinal beam;

[0019] S4 welds vertical seams, then welds butt seams. The order of welding vertical seams is as follows: first weld the vertical seam between the first longitudinal beam and the first transverse beam, then weld the vertical seam between the second longitudinal beam and the second transverse beam, then weld the vertical seam between the second longitudinal beam and the first transverse beam, and then weld the vertical seam between the first longitudinal beam and the second transverse beam. The welding order of butt seams is the same as that of welding vertical seams.

[0020] S5 upper part;

[0021] S6 assembly;

[0022] Both the first and second crossbeams are square tubular structures. When the first and second crossbeams are welded to the longitudinal beams, there are four welds: two butt welds at the top and bottom ends of the crossbeams, and two vertical welds at the left and right ends of the crossbeams. The butt welds are horizontal in length, and the vertical welds are vertical in length.

[0023] The two vertical joints are the inner vertical joint and the outer vertical joint, respectively.

[0024] Two sets of horizontal beams and two sets of vertical beams form a closed structure. Among the two sets of vertical joints at the ends of the horizontal beams, the one closer to the center of the closed structure is the inner vertical joint.

[0025] A third aspect of the present invention provides a skateboard chassis support obtained by the above-described processing method.

[0026] Beneficial effects: The skateboard chassis bracket disclosed in this invention has high positioning accuracy, does not rely on manual operation, and the bracket is not easily deformed after welding. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the skateboard chassis support of the present invention.

[0028] Figure 2 This is a schematic diagram of the support structure.

[0029] Figure 3 This is a schematic diagram of the longitudinal beam.

[0030] Figure 4 This is an assembly and welding diagram for the skateboard chassis support.

[0031] In the diagram: 1. First longitudinal beam, 2. Second longitudinal beam, 3. First crossbeam, 4. Second crossbeam, 5. Bracket, 6. Swing arm, 7. Inner vertical joint, 8. Outer vertical joint, 11. First pop rivet hole, 12. Second bolt hole, 51. First pop rivet hole, 52. First bolt hole, 53. Flanged edge, 54. Base plate, 55. Side wall. Detailed Implementation

[0032] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0035] like Figures 1 to 4 As shown, the first aspect of the present invention provides a skateboard chassis support, which includes a first longitudinal beam 1, a second longitudinal beam 2, a first crossbeam 3, a second crossbeam 4, a support 5, and a swing arm 6;

[0036] The first crossbeam 3 and the second crossbeam 4 are arranged in parallel.

[0037] One end of the first crossbeam 3 and the second crossbeam 4 are both welded to the first longitudinal beam 1;

[0038] The other ends of the first crossbeam 3 and the second crossbeam 4 are both welded to the second longitudinal beam 2;

[0039] Two sets of brackets 5 are provided on the upper surfaces of both the first longitudinal beam 1 and the second longitudinal beam 2. The bottom of each bracket is provided with a flange 53, and the flange 53 is provided with a first pull-core rivet hole 51.

[0040] The upper surfaces of the first longitudinal beam 1 and the second longitudinal beam 2 are each provided with a second core-pulling rivet hole 11;

[0041] The rivet passes through the first pop rivet hole 51 and the second pop rivet hole 11 to connect the flange 53 to the first longitudinal beam 1 / second longitudinal beam 2;

[0042] In the bracket, a first bolt hole 52 is provided on the side wall perpendicular to the flange, and one end of the swing arm 6 is screwed to the bracket 5 through the first bolt hole 52.

[0043] Both the first and second crossbeams are square tubular structures. When the first and second crossbeams are welded to the longitudinal beams, there are four welds: two butt welds at the top and bottom ends of the crossbeams, and two vertical welds at the left and right ends of the crossbeams. The butt welds are horizontal in length, and the vertical welds are vertical in length.

[0044] The two vertical joints are the inner vertical joint (7) and the outer vertical joint (8);

[0045] Two sets of horizontal beams and two sets of vertical beams form a closed structure. Among the two sets of vertical joints at the ends of the horizontal beams, the one closer to the center of the closed structure is the inner vertical joint.

[0046] The middle parts of the first longitudinal beam 1 and the second longitudinal beam 2 are both concave towards the first cross beam 3 and the second cross beam 4.

[0047] The middle portions of both the first longitudinal beam 1 and the second longitudinal beam 2 are recessed towards the first crossbeam 3 and the second crossbeam 4, respectively. The flange 53 is welded to the first longitudinal beam 1 and the second longitudinal beam 2.

[0048] The bracket includes a flange 53, a base plate 54, and a side wall 55. The side wall 55 is disposed opposite to both sides of the base plate 54. The flange 53 is disposed at the bottom of the side wall 55 and is perpendicular to the side wall 55 and the base plate 54.

[0049] Both ends of the first longitudinal beam 1 and the second longitudinal beam 2 are provided with second bolt holes 12.

[0050] A second aspect of the present invention provides a method for processing the above-mentioned skateboard chassis bracket, wherein the processing method includes:

[0051] The first core-pulling rivet hole and the first bolt hole on the S1 machining bracket, as well as the second core-pulling rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam.

[0052] S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing a pop rivet through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam.

[0053] S3 welds the flange of the bracket to the first longitudinal beam / second longitudinal beam;

[0054] S4 welds vertical seams, then welds butt seams. The order of welding vertical seams is as follows: first weld the vertical seam between the first longitudinal beam and the first transverse beam, then weld the vertical seam between the second longitudinal beam and the second transverse beam, then weld the vertical seam between the second longitudinal beam and the first transverse beam, and then weld the vertical seam between the first longitudinal beam and the second transverse beam. The welding order of butt seams is the same as that of welding vertical seams.

[0055] S5 upper part;

[0056] S6 assembly;

[0057] Both the first and second crossbeams are square tubular structures. When the first and second crossbeams are welded to the longitudinal beams, there are four welds: two butt welds at the top and bottom ends of the crossbeams, and two vertical welds at the left and right ends of the crossbeams. The butt welds are horizontal, and the vertical welds are vertical.

[0058] The two vertical joints are the inner vertical joint and the outer vertical joint, respectively.

[0059] Two sets of horizontal beams and two sets of vertical beams form a closed structure. Of the two sets of vertical joints at the ends of the horizontal beams, the one closer to the center of the closed structure is the inner vertical joint.

[0060] In this invention, the specific welding sequence described above can solve the problem of deformation of the skateboard chassis bracket after welding.

[0061] As a supplement to the technical solution of this invention, such as Figure 1 As shown, taking the first crossbeam as an example, among the two sets of vertical joints of the first crossbeam, the vertical joint closer to the second crossbeam is the inner vertical joint, and the vertical joint farther from the second crossbeam is the outer vertical joint.

[0062] In this invention, the vertical weld mentioned in S4 is the welded joint between the inner and outer vertical joints of the longitudinal beam and the transverse beam before welding the next welding point. The butt weld is the welded joint between the upper and lower surfaces of the longitudinal beam and the transverse beam before welding the next welding point.

[0063] According to the present invention, the welding process includes:

[0064] Laser wire filler welding process, laser power is 4200-4500W, defocusing amount is 0, wire feed speed is 4.2-4.5m / min, welding speed is 3-4m / min.

[0065] In this invention, the specific welding process with low heat input described above can solve the problem of deformation of the skateboard chassis bracket after welding.

[0066] A third aspect of the present invention provides a skateboard chassis support obtained by the above-described processing method.

[0067] Test methods

[0068] Flatness measurement uses a special fixture, which is placed on the plane of the profile, and the maximum distance from the profile surface to the fixture surface is measured.

[0069] Position deviation is measured using a coordinate measuring machine (CMM) to measure the coordinate values ​​of the borehole position.

[0070] The positional deviation of the bracket hole after welding is the difference in the position of the center of the bracket core-pulling rivet hole before and after welding.

[0071] The positional deviation of the longitudinal beam holes after welding is the difference in the position of the center of the longitudinal beam core-pulling rivet holes before and after welding.

[0072] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the embodiments described herein are only some embodiments of the present invention and are not intended to limit the present invention. All other embodiments implemented by those skilled in the art based on the embodiments of the present invention without creative improvements are within the protection scope of the present invention.

[0073] Example 1

[0074] The S1 bracket has a flange, and the first blind rivet hole, the first bolt hole, the second blind rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam are machined. The blind rivet hole at the flange adopts two M5 blind rivets with a hole diameter of 5.1mm.

[0075] S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing pop rivets through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam.

[0076] The flange of the S3 bracket is welded to the first longitudinal beam / second longitudinal beam.

[0077] After S4 positioning, assemble the workpiece into a special fixture for welding. First, weld all vertical seams, then weld the butt welds on the top and bottom surfaces. Weld the vertical seams between the first longitudinal beam and the first transverse beam first, then the vertical seams between the second longitudinal beam and the second transverse beam, then the vertical seams between the second longitudinal beam and the first transverse beam, and so on, until the butt welds on the upper surface are completed. After flipping the fixture, complete the butt welds on the lower surface. Laser wire filler welding is used, with a laser power of 4300W, a defocusing amount of 0, a wire feed speed of 4.2m / min, and a welding speed of 3.5m / min.

[0078] S5 places the first and second longitudinal beams and the first and second cross beams, which have already been welded to the bracket, onto a special tooling.

[0079] The S6 assembly is equipped with clamping and support blocks. The support blocks are equipped with locating pins that can be adjusted in three directions. The swing arm is connected by bolts on the bracket. The bolt holes of the first longitudinal beam, the second longitudinal beam, the first cross beam, and the second cross beam are engaged to complete the assembly.

[0080] A skateboard chassis bracket A1 was manufactured.

[0081] Example 2

[0082] The S1 bracket has a flange, and the first blind rivet hole, the first bolt hole, the second blind rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam are machined. The blind rivet hole at the flange adopts two M5 blind rivets with a hole diameter of 5.1mm.

[0083] S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing pop rivets through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam.

[0084] The flange of the S3 bracket is welded to the first longitudinal beam / second longitudinal beam.

[0085] After S4 positioning, assemble the workpiece into a special fixture for welding. First, weld all vertical seams, then weld the butt welds on the top and bottom surfaces. Weld the vertical seams between the first longitudinal beam and the first transverse beam first, then the vertical seams between the second longitudinal beam and the second transverse beam, then the vertical seams between the second longitudinal beam and the first transverse beam, and so on, until the butt welds on the upper surface are completed. After flipping the fixture, complete the butt welds on the lower surface. Laser wire feed welding is used, with a laser power of 4200W, a defocusing amount of 0, a wire feed speed of 4.2m / min, and a welding speed of 3.5m / min.

[0086] S5 places the first and second longitudinal beams and the first and second cross beams, which have already been welded to the bracket, onto a special tooling.

[0087] The S6 assembly is equipped with clamping and support blocks. The support blocks are equipped with locating pins that can be adjusted in three directions. The swing arm is connected by bolts on the bracket. The bolt holes of the first longitudinal beam, the second longitudinal beam, the first cross beam, and the second cross beam are engaged to complete the assembly.

[0088] The skateboard chassis support A2 was manufactured.

[0089] Example 3

[0090] The S1 bracket has a flange, and the first blind rivet hole, the first bolt hole, the second blind rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam are machined. The blind rivet hole at the flange adopts two M5 blind rivets with a hole diameter of 5.1mm.

[0091] S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing pop rivets through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam.

[0092] The flange of the S3 bracket is welded to the first longitudinal beam / second longitudinal beam.

[0093] After S4 positioning, assemble the workpiece into a special fixture for welding. First, weld all vertical seams, then weld the butt welds on the top and bottom surfaces. Weld the vertical seams between the first longitudinal beam and the first transverse beam first, then the vertical seams between the second longitudinal beam and the second transverse beam, then the vertical seams between the second longitudinal beam and the first transverse beam, and so on, until the butt welds on the upper surface are completed. After flipping the fixture, complete the butt welds on the lower surface. Laser filler wire welding is used, with a laser power of 4500W, a defocusing amount of 0, a wire feed speed of 4.5m / min, and a welding speed of 3m / min.

[0094] S5 places the first and second longitudinal beams and the first and second cross beams, which have already been welded to the bracket, onto a special tooling.

[0095] The S6 assembly is equipped with clamping and support blocks. The support blocks are equipped with locating pins that can be adjusted in three directions. The swing arm is connected by bolts on the bracket. The bolt holes of the first longitudinal beam, the second longitudinal beam, the first cross beam, and the second cross beam are engaged to complete the assembly.

[0096] The skateboard chassis bracket A3 was manufactured.

[0097] Comparative Example 1

[0098] The S1 bracket has a non-flanged structure.

[0099] S2 uses a ruler to measure the distance from the bracket to the edge, then welds the points to secure them and confirm the position.

[0100] After S3 positioning, the workpiece is assembled into a special tooling for welding.

[0101] After the S4 welding is completed, the swing arm is connected by bolts on the bracket.

[0102] The skateboard chassis bracket DA1 was manufactured.

[0103] Comparative Example 2

[0104] The S1 bracket has a non-flanged structure.

[0105] S2 uses tooling positioning blocks to position the bracket.

[0106] After S3 positioning, the workpiece is assembled into a special tooling for welding.

[0107] After the S4 welding is completed, the swing arm is connected by bolts on the bracket.

[0108] The skateboard chassis bracket DA2 was manufactured.

[0109] Comparative Example 3

[0110] The skateboard chassis bracket was prepared according to the processing method of Example 1, except that the welding sequence was as follows: first, the vertical joint between the first longitudinal beam and the first transverse beam was welded; then, the vertical joint between the first longitudinal beam and the second transverse beam was welded; then, the vertical joint between the second longitudinal beam and the second transverse beam was welded; finally, the vertical joint between the first longitudinal beam and the first transverse beam was welded. The butt welds on the upper surface were completed in this order. After flipping the tooling, the butt welds on the lower surface were completed. The skateboard chassis bracket DA3 was thus obtained.

[0111] Comparative Example 4

[0112] The skateboard chassis bracket was prepared according to the processing method of Example 1, except that the laser power was 4000W, the defocusing amount was 0, the wire feed speed was 5m / min, and the welding speed was 5m / min. The skateboard chassis bracket DA4 was obtained.

[0113] Table 1 shows the performance parameters of skateboard chassis brackets A1-A3 and DA1-DA4.

[0114] Table 1

[0115]

[0116] As shown in Table 1, the skateboard chassis bracket provided by the present invention has better flatness, and smaller deviations in the position of the mounting holes and longitudinal beam holes after welding. This indicates that the skateboard chassis bracket provided by the present invention has high positioning accuracy, does not rely on manual operation, and is not easily deformed after welding.

[0117] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A skateboard chassis support, characterized in that, Includes the first longitudinal beam (1), the second longitudinal beam (2), the first cross beam (3), the second cross beam (4), the bracket (5), and the swing arm (6); The first crossbeam (3) and the second crossbeam (4) are arranged in parallel; One end of the first crossbeam (3) and the second crossbeam (4) are both welded to the first longitudinal beam (1); The other ends of the first crossbeam (3) and the second crossbeam (4) are both welded to the second longitudinal beam (2); Two sets of brackets (5) are provided on the upper surface of the first longitudinal beam (1) and the second longitudinal beam (2). The bottom of the bracket is provided with a flange (53), and the flange (53) is provided with a first core-pulling rivet hole (51). The upper surfaces of the first longitudinal beam (1) and the second longitudinal beam (2) are provided with second core-pulling rivet holes (11). The rivet passes through the first pop rivet hole (51) and the second pop rivet hole (11) to connect the flange (53) to the first longitudinal beam (1) / the second longitudinal beam (2); In the bracket, a first bolt hole (52) is provided on the side wall perpendicular to the flange (53), and one end of the swing arm (6) is screwed to the bracket (5) through the first bolt hole (52); Both the first and second crossbeams are square tube structures. When the first and second crossbeams are welded to the longitudinal beams, there are four welds: two butt welds at the top and bottom ends of the crossbeams and two vertical welds at the left and right ends of the crossbeams. The length direction of the butt welds is horizontal, and the length direction of the vertical welds is vertical. The two vertical joints are the inner vertical joint (7) and the outer vertical joint (8); Two sets of horizontal beams and two sets of vertical beams form a closed structure. Among the two sets of vertical joints at the ends of the horizontal beams, the one closer to the center of the closed structure is the inner vertical joint. The processing method of the skateboard chassis bracket includes: The first core-pulling rivet hole and the first bolt hole on the S1 machining bracket, as well as the second core-pulling rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam. S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing a pop rivet through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam. S3 welds the flange of the bracket to the first longitudinal beam / second longitudinal beam; S4 welds vertical seams, then welds butt seams. The order of welding vertical seams is as follows: first weld the vertical seam between the first longitudinal beam and the first transverse beam, then weld the vertical seam between the second longitudinal beam and the second transverse beam, then weld the vertical seam between the second longitudinal beam and the first transverse beam, and then weld the vertical seam between the first longitudinal beam and the second transverse beam. The welding order of butt seams is the same as that of welding vertical seams. S5 upper part; S6 assembly.

2. The skateboard chassis bracket according to claim 1, characterized in that, The middle parts of the first longitudinal beam (1) and the second longitudinal beam (2) are both concave towards the first cross beam (3) and the second cross beam (4).

3. The skateboard chassis bracket according to claim 1, characterized in that, The middle parts of the first longitudinal beam (1) and the second longitudinal beam (2) are both concave towards the first cross beam (3) and the second cross beam (4), and the flange (53) is welded to the first longitudinal beam (1) and the second longitudinal beam (2).

4. The skateboard chassis bracket according to claim 1, characterized in that, The bracket includes a flange (53), a base plate (54), and a side wall (55). The side wall (55) is disposed opposite to the two sides of the base plate (54). The flange (53) is disposed at the bottom of the side wall (55) and is perpendicular to the side wall (55) and the base plate (54).

5. The skateboard chassis bracket according to claim 1, characterized in that, The first longitudinal beam (1) and the second longitudinal beam (2) are provided with second bolt holes (12) at both ends.

6. A method for processing the skateboard chassis bracket according to any one of claims 1-5, characterized in that, The processing method includes: The first core-pulling rivet hole and the first bolt hole on the S1 machining bracket, as well as the second core-pulling rivet hole and the second bolt hole on the first longitudinal beam and the second longitudinal beam. S2 will connect the bracket to the first longitudinal beam / second longitudinal beam by passing a pop rivet through the first pop rivet hole on the bracket and the second pop rivet hole on the first longitudinal beam / second longitudinal beam. S3 welds the flange of the bracket to the first longitudinal beam / second longitudinal beam; S4 welds vertical seams, then welds butt seams. The order of welding vertical seams is as follows: first weld the vertical seam between the first longitudinal beam and the first transverse beam, then weld the vertical seam between the second longitudinal beam and the second transverse beam, then weld the vertical seam between the second longitudinal beam and the first transverse beam, and then weld the vertical seam between the first longitudinal beam and the second transverse beam. The welding order of butt seams is the same as that of welding vertical seams. S5 upper part; S6 assembly; Both the first and second crossbeams are square tube structures. When the first and second crossbeams are welded to the longitudinal beams, there are four welds: two butt welds at the top and bottom ends of the crossbeams and two vertical welds at the left and right ends of the crossbeams. The length direction of the butt welds is horizontal, and the length direction of the vertical welds is vertical. The two vertical joints are the inner vertical joint and the outer vertical joint, respectively. Two sets of horizontal beams and two sets of vertical beams form a closed structure. Among the two sets of vertical joints at the ends of the horizontal beams, the one closer to the center of the closed structure is the inner vertical joint.

7. The processing method according to claim 6, characterized in that, The welding process includes: Laser wire filler welding process, laser power is 4200-4500W, defocusing amount is 0, wire feed speed is 4.2-4.5m / min, welding speed is 3-4m / min.

8. A skateboard chassis bracket manufactured by the processing method of claim 6 or 7.

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