A mounting bracket assembly for fender installation and fender assembly method

Abstract

The invention relates to the field of fenders, and in particular to a mounting bracket assembly for fender installation and a fender assembly method; the mounting bracket comprises a Y-direction mounting bracket, a Z-direction mounting bracket and an X-direction mounting bracket; the Y-direction mounting bracket comprises a fender front bracket arranged on a headlight cross beam and a fender upper bracket arranged on a side assembly; the Z-direction mounting bracket comprises a fender upper mounting bracket arranged on a headlight cross beam; the X-direction mounting bracket comprises a fender rear bracket arranged on a vertical plate of a front cabin of a car; the invention discloses a mounting bracket assembly for fender installation; the invention can realize not only fender assembly through the mutual cooperation among the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket, but also fender assembly position adjustment, so as to ensure that the assembly gap formed after the fender is assembled with adjacent components meets the design requirements.

Description

Technical Field

[0001] The invention relates to the field of fenders, in particular to a mounting bracket assembly for mounting a fender and a fender assembly method. Background Art

[0002] Dimensional engineering is a concept covering the entire process of product design, tooling design, component manufacturing and assembly.

[0003] It aims to reduce costs, speed up trial production, shorten the R&D cycle, and ultimately improve the quality of vehicle development through process quality control. From pre-research to matching production, dimensional engineering runs through the entire process, and its importance cannot be overstated.

[0004] The fender is an important part of the vehicle's appearance matching process. Its installation effect directly affects the achievement of the DTS target of the front face area, thus affecting the aesthetics and engineering refinement of the entire vehicle.

[0005] It is not only the key area of ​​users' attention, but also the key and difficult point in the vehicle matching process. Vehicle manufacturers generally meet DTS by developing fixtures, improving the accuracy of the matching parts themselves, or setting up workstations for online adjustment and assembly.

[0006] However, these methods are often not very effective. They either increase the cost of the vehicle or affect production efficiency, and they do not fundamentally solve the matching relationship between the fender and surrounding parts.

[0007] In addition, the fender mounting bracket of conventional models is not adjustable in the Y direction. When the Y-direction opening size of the vehicle body fluctuates, the gap between the fender and the hood cannot meet the DTS requirements, increasing the difficulty of on-site adjustment.

[0008] Therefore, in order to avoid the above problems, auxiliary tools or improvements to the overall structure of the fender are needed. Summary of the invention

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a mounting bracket assembly suitable for a vehicle body welding system and capable of ensuring the assembly accuracy of a fender and adjacent components.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A mounting bracket assembly for mounting a fender; comprising a Y-direction mounting bracket, a Z-direction mounting bracket and an X-direction mounting bracket; the Y-direction mounting bracket comprises a fender front bracket arranged on a headlight cross beam and a fender upper bracket arranged on a side panel assembly; the Z-direction mounting bracket comprises a fender upper mounting bracket arranged on the headlight cross beam; the X-direction mounting bracket comprises a fender rear bracket arranged on a vertical plate of a front cabin of a vehicle.

[0012] The fender front bracket includes a front bracket body, on which a first fender assembly hole and a front bracket assembly hole are provided; the front bracket body includes a front bracket transverse plate and a front bracket longitudinal plate, and the front bracket longitudinal plate is arranged to intersect with the front bracket transverse plate; the first fender assembly hole is arranged on the front bracket longitudinal plate; the front bracket assembly hole is arranged on the front bracket transverse plate.

[0013] The fender front bracket is provided with at least two first fender assembly holes.

[0014] The mounting bracket assembly also includes a fender upper bracket, and the fender upper bracket includes a second fender assembly hole provided thereon.

[0015] The fender mounting bracket includes an upper mounting bracket body, and the upper mounting bracket body is provided with a third fender assembly hole and an upper mounting bracket assembly hole; the upper mounting bracket body includes an upper mounting bracket transverse plate and an upper mounting bracket longitudinal plate, and the upper mounting bracket longitudinal plate is arranged perpendicular to the upper mounting bracket transverse plate; the third fender assembly hole is arranged on the upper mounting bracket transverse plate; the upper mounting bracket assembly hole is arranged on the upper mounting bracket longitudinal plate.

[0016] The fender rear bracket is arranged on the vertical plate of the front cabin of the automobile; the fender rear bracket includes a rear bracket body; the rear bracket body is provided with a fourth fender assembly hole and a rear bracket assembly hole; the rear bracket body includes a rear bracket transverse plate and a rear bracket longitudinal plate, and the rear bracket longitudinal plate is arranged perpendicular to the rear bracket transverse plate; the fourth fender assembly hole is arranged on the rear bracket longitudinal plate; the rear bracket assembly hole is arranged on the rear bracket transverse plate.

[0017] The mounting bracket assembly includes a plurality of fender rear brackets; the plurality of fender rear brackets are arranged longitudinally along the front cabin vertical plate.

[0018] A fender assembly method includes the following assembly method:

[0019] Step 1: First, weld the Y-axis mounting bracket, Z-axis mounting bracket, and X-axis mounting bracket on the vehicle body;

[0020] Step 2: After completing step 1, connect the fender to the vehicle body through the above-mentioned mounting bracket assembly;

[0021] Step 3: After completing step 2, the installation of one fender is completed. If you need to repeat the assembly of the fender, just repeat steps 1-2 above.

[0022] After the step 2 is completed, the assembly clearance between the fender and the adjacent components is detected. If there is a difference between the detected value and the standard value, the assembly clearance between the fender and the adjacent components is adjusted by adjusting the welding positions between the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket and the vehicle body.

[0023] The fender is provided with a mounting portion connected to the mounting bracket assembly.

[0024] The advantages of the present invention are:

[0025] The present invention discloses a mounting bracket assembly for mounting a fender; the present invention can realize not only the assembly of the fender but also the adjustment of the assembly position of the fender through the mutual cooperation between the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket, so as to ensure that the assembly gap formed after the fender and adjacent components are assembled meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the mounting point on the fender in the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the installation point on the vehicle body in the present invention.

[0030] Figure 4 It is a schematic structural diagram of the front bracket of the fender in the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the bracket on the fender in the present invention.

[0032] Figure 6 It is a schematic structural diagram of the connection between the front bracket of the fender and the vehicle body in the present invention.

[0033] Figure 7 It is a structural schematic diagram of the second viewing angle when the fender front bracket is connected to the vehicle body in the present invention.

[0034] Figure 8 It is a schematic diagram of the structure of the mounting bracket on the fender in the present invention.

[0035] The marks in the above figure are:

[0036] 1. Front bracket of fender, 2. Upper bracket of fender, 3. Mounting bracket of fender, 4. Rear bracket of fender, 5. Headlight cross beam, 6. Vertical plate of front cabin. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0038] A mounting bracket assembly for mounting a fender; comprising a Y-direction mounting bracket, a Z-direction mounting bracket and an X-direction mounting bracket; the invention discloses a mounting bracket assembly for mounting a fender; the invention can realize not only the assembly of the fender but also the adjustment of the assembly position of the fender through the mutual cooperation among the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket, so as to ensure that the assembly gap formed after the fender and adjacent components are assembled meets the design requirements.

[0039] Specifically, the mounting bracket assembly disclosed in the present invention mainly includes a Y-direction mounting bracket, a Z-direction mounting bracket and an X-direction mounting bracket; the Y-direction mounting bracket includes a fender front bracket 1 arranged on the headlight cross beam and a fender upper bracket 2 arranged on the side panel assembly; the fender front bracket 1 includes a front bracket body, and the front bracket body is provided with a first fender assembly hole 111 and a front bracket assembly hole 121; the front bracket body includes a front bracket transverse plate 12 and a front bracket longitudinal plate 11, and the front bracket longitudinal plate 11 is arranged to intersect with the front bracket transverse plate 12; the first fender assembly hole 111 is arranged on the front bracket longitudinal plate 11; the front bracket assembly hole 121 is arranged on the front bracket transverse plate 12; the mounting bracket assembly also includes a fender upper bracket 2, the fender The sub-panel bracket 2 includes a second fender assembly hole 21; the fender front bracket 1 of the present invention is located at the front end of the headlight beam, and the front bracket cross plate 12 in the fender front bracket 1 fits with the front end of the headlight beam, and the front bracket cross plate 12 fits with the front end of the headlight beam; in addition, in the present invention, a first fender assembly hole 111 is set on the front bracket longitudinal plate 11, and the first fender assembly hole 111 is connected to the front end of the fender, and the connection method can be bolted; at the same time, the present invention also provides that the mounting bracket assembly also includes a fender bracket 2, and the fender bracket 2 includes a second fender assembly hole 21; during actual assembly, the fender bracket 2 is welded to the front panel assembly, and after welding, it is connected to the fender to realize the assembly and fixation of the fender.

[0040] In addition, in the present invention, the Z-direction mounting bracket includes a fender mounting bracket 3 arranged on the headlight cross beam; the fender mounting bracket 3 includes an upper mounting bracket body, and the upper mounting bracket body is provided with a third fender assembly hole 321 and an upper mounting bracket assembly hole; the upper mounting bracket body includes an upper mounting bracket transverse plate 32 and an upper mounting bracket longitudinal plate 31, and the upper mounting bracket longitudinal plate 31 is arranged perpendicular to the upper mounting bracket transverse plate 32; the third fender assembly hole 321 is arranged on the upper mounting bracket transverse plate 32; the upper mounting bracket assembly hole is arranged on the upper mounting bracket longitudinal plate 31; the purpose of arranging the Z-direction mounting bracket in the present invention is to change the assembly position of the fender in the longitudinal direction later, so as to realize the assembly gap adjustment between the fender and the front bonnet; during actual assembly, the upper mounting bracket longitudinal plate 31 in the fender mounting bracket 3 is connected to the vehicle body by welding, and the upper mounting bracket transverse plate 32 in the fender mounting bracket 3 is connected to the fender by bolt connection.

[0041] In addition to the above structure, the present invention is also provided with an X-direction mounting bracket; in the present invention, the X-direction mounting bracket includes a fender rear bracket 4 arranged on the vertical plate 6 of the front cabin of the automobile; the fender rear bracket 4 is arranged on the vertical plate 6 of the front cabin of the automobile; the fender rear bracket 4 includes a rear bracket body; the rear bracket body is provided with a fourth fender assembly hole 43 and a rear bracket assembly hole; the rear bracket body includes a rear bracket transverse plate 41 and a rear bracket longitudinal plate 42, and the rear bracket longitudinal plate 42 is arranged perpendicular to the rear bracket transverse plate 41; the fourth fender assembly hole 43 is arranged on the rear bracket longitudinal plate 42; the rear bracket assembly hole is arranged on the rear bracket transverse plate 41; the arrangement of the fender rear bracket 4 facilitates the fixed connection of the rear end of the fender, and in actual assembly, the position of the fender rear bracket 4 can be adjusted to cooperate with other mounting bracket structures to adjust the fender assembly gap; in actual use, the rear bracket transverse plate 41 in each fender rear bracket 4 is welded to the front cabin vertical plate 6, and the rear bracket longitudinal plate 42 can be connected to the fender by bolts.

[0042] Furthermore, in the present invention, at least two first fender assembly holes 111 are provided on the fender front bracket 1; such a configuration enables the fender front bracket 1 to have multiple installation positions, thereby ensuring the installation stability between the fender and the fender front bracket 1.

[0043] Furthermore, the mounting bracket assembly in the present invention includes a plurality of fender rear brackets 4; the plurality of fender rear brackets 4 are longitudinally arranged along the front compartment vertical plate 6; such an arrangement can ensure the stability of the fender installation, so that there are more connection points between the fender and the vehicle body, avoiding problems such as displacement of the fender.

[0044] A fender assembly method includes the following assembly method:

[0045] Step 1: First, weld the Y-axis mounting bracket, Z-axis mounting bracket, and X-axis mounting bracket on the vehicle body;

[0046] Step 2: After completing step 1, connect the fender to the vehicle body through the above-mentioned mounting bracket assembly;

[0047] Step 3: After completing step 2, the installation of one fender is completed. If you need to repeat the assembly of the fender, just repeat steps 1-2 above.

[0048] The present invention can realize the assembly of the fender through the disclosure of the above-mentioned assembly method.

[0049] In addition, after the completion of step 2 described in the present invention, the assembly gap between the fender and the adjacent components is detected. If the detection has a difference with the standard value; the assembly gap between the fender and the adjacent components is adjusted by adjusting the welding position between the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket and the vehicle body; in other words, the assembly method disclosed in the present invention can be used in conjunction with a welding line. After the previous fender is assembled, the assembled fender is detected to detect whether the assembly gap between it and the adjacent components meets the design requirements. If it meets the design requirements, the subsequent fender can be assembled in the above-mentioned assembly method. If it does not meet the design requirements, according to the detection results, the welding position between the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket and the vehicle body is adjusted to achieve the adjustment of the actual installation position of the fender.

[0050] Furthermore, the fender of the present invention is provided with a mounting portion connected to the mounting bracket assembly; the fender of the present invention is provided with multiple mounting portions, and the fender is assembled on the vehicle through the multiple mounting portions; the mounting portion includes an upper flange arranged at the upper edge of the fender, and the upper flange is provided with a first Z-direction mounting point 74 and a second Z-direction mounting point 75; the first Z-direction mounting point 74 and the second Z-direction mounting point 75 are distributed at intervals; a side flange is provided at the front end of the fender near the front bumper, and a first Y-direction mounting point 71 and a second Y-direction mounting point 72 are provided on the side flange; the first Y-direction mounting point 71 and the second Y-direction mounting point 72 are distributed at intervals; in addition, the mounting portion of the fender near one end of the front wall assembly includes a longitudinal plate, and the longitudinal plate is arranged parallel to the fender; a clamping U A U-shaped groove is formed on the fender, and the clamping U-shaped groove forms a third Y-direction mounting point 73; a lower flange is provided at the lower end of the fender; a fourth Y-direction mounting point 79 and a fifth Y-direction mounting point 80 are provided on the lower flange; the fourth Y-direction mounting point 79 and the fifth Y-direction mounting point 80 are distributed at intervals; in addition, a plurality of mounting portions are provided on the side of the fender of the present invention close to the front cabin vertical plate 6, and the mounting portion in this area includes a transverse plate, which is arranged perpendicular to the fender, and a clamping U-shaped groove is also provided on the transverse plate, but the position and direction of the clamping U-shaped groove on the longitudinal plate are perpendicular to each other, and a first X-direction mounting point 76, a second X-direction mounting point 77, and a third X-direction mounting point 78 are respectively formed on the fender from top to bottom; as shown in the drawings; based on the disclosure of the above-mentioned structural mounting portion, the present invention can well realize the connection between the fender and the vehicle body or the above-mentioned mounting bracket assembly.

[0051] specific;

[0052] On the vehicle body, the mounting points of the fenders are specifically as follows: the first Z-direction mounting point 3-1 of the fender is on the headlight crossbeam bracket 5, and the second Z-direction mounting point 3-2 of the fender is on the fender mounting bracket 3; the first Y-direction mounting point 1-1 of the fender and the second Y-direction mounting point 1-2 of the fender are on the left fender front bracket 1; the third Y-direction mounting point 1-3 of the fender is on the fender bracket 2; the fourth Y-direction mounting point 1-4 of the fender and the fifth Y-direction mounting point 1-5 of the fender are arranged at the lower end of the front cabin vertical plate 6; there are also three fender mounting locations on the front cabin vertical plate 6, specifically the first X-direction mounting point 4-1 of the fender, the second X-direction mounting point 4-2 of the fender and the third X-direction mounting point 4-3 of the fender; in the present invention, the first X-direction mounting point 4-1 of the fender, the second X-direction mounting point 4-2 of the fender and the third X-direction mounting point 4-3 of the fender are distributed in sequence from top to bottom.

[0053] In the present invention, the first Z-direction mounting point and the second Z-direction mounting point on the fender are φ11mm mounting holes, which are fastened with M6 bolts, and an adjustment amount of 2.5mm is reserved on one side of the mounting hole; the first Y-direction mounting point, the second Y-direction mounting point, the fourth Y-direction mounting point and the fifth Y-direction mounting point have φ11mm mounting holes, which are fastened with M6 bolts, and an adjustment amount of 2.5mm is reserved on one side; the third Y-direction mounting point has an opening of an 11mm Z-direction oblong notch, which is fastened with M6 bolts; an adjustment amount of 2.5mm is reserved on one side in the X direction; the first X-direction mounting point, the second X-direction mounting point and the third X-direction mounting point have an X-direction oblong notch of 11mm, which are fastened with M6 bolts, and an adjustment amount of 2.5mm is reserved on one side in the Z direction.

[0054] In the present invention, the headlight cross beam bracket 5 is connected to the vehicle body frame, the end of the headlight cross beam bracket 5 is connected to the fender front bracket 1, a fender mounting bracket 3 is also provided on the headlight cross beam bracket 5, a fender upper bracket 2 is provided on the side panel assembly; and a fender rear bracket 4 is provided on the front cabin vertical plate 6.

[0055] The headlight beam bracket 5 and the fender mounting bracket 3 are welded to the ShotGun to form a ShotGun assembly, which is welded to the lower body assembly at the main welding line. The fender mounting bracket 3 is adjustable in the Z direction during welding, and the bracket is convexly welded with an M6 nut; the fender front bracket 1 is welded to the ShotGun assembly at the main welding line, and the fender upper bracket 2 is welded to the side panel assembly at the main welding line. The above two brackets can be adjusted in the Y direction, and the brackets are convexly welded with M6 nuts; the fender Y-direction mounting points 4 and 5 are on the front cabin vertical plate 6 on the lower body assembly, and are convexly welded with M6 nuts; the fender rear bracket 4 is an L-shaped fender bracket, which is welded at the last sequence of the side panel assembly to shorten the size chain. At the same time, the fender bracket is adjustable in the X direction, and the bracket is convexly welded with an M6 nut.

[0056] The present invention discloses a mounting bracket assembly for mounting a fender, which can improve the matching defects between the fender and adjacent components and meet the matching requirements; finally, the DTS matching components are associated with each other through structural design, reference transfer, local positioning, etc., so as to shorten the size chain link and ensure the matching quality.

[0057] The ShotGun assembly (reinforcement beam outer panel assembly on the front wheel housing) usually has a fender Z-direction mounting point and a front cover hinge Z-direction mounting point, and the Z-direction relationship between the front cover and the fender is difficult to match; therefore, the mounting bracket 3 on the fender is designed to be L-shaped, with a Z-direction sliding overlap, so that its Z-direction relative to the front cover hinge mounting point can be independently adjusted during welding.

[0058] The fender front bracket 1 is welded to the ShotGun assembly on the main welding line, and the welding surface is the Z-direction welding surface. Due to structural limitations, spot welding cannot be achieved, and two plug welding holes are opened on the two welding surfaces of the bracket for CO2 welding; when the clearance and flatness coordination between the fender and the bonnet and the front bumper fluctuate and do not meet the DTS requirements, the fender front bracket 1 can be adjusted in the Y direction on the welding line to ensure the clearance and flatness coordination between the fender and the bonnet and the front bumper to meet the DTS requirements.

[0059] The upper bracket 2 on the fender is welded to the side panel assembly at the main welding line, and the welding surface is the Z-direction welding surface. Due to structural limitations, spot welding cannot be achieved. Two plug welding holes are opened on the Z welding surface of the bracket for CO2 welding; when the clearance fit between the fender and the bonnet fluctuates and does not meet the DTS requirements, the front bracket 1 of the fender can be adjusted in the Y direction on the welding line to ensure the clearance fit between the fender and the bonnet to meet the DTS requirements.

[0060] As described above, in addition to providing an effective structural system, the structure of the present invention also illustrates a dimensional thinking mode of interrupting the dimension transfer chain to improve the matching effect, establishing a local reference, transferring the reference relationship through parts, and reducing the tolerance.

[0061] In addition, the reason (basis) why the above-mentioned bracket can be adjusted is that each assembly hole is designed as a large hole or a waist-shaped hole structure as needed, so that the assembly hole has multiple plug-in fixed positions, which is convenient for the subsequent use of welding columns to realize the corresponding Y-direction mounting bracket, Z-direction mounting bracket and X-direction mounting bracket in the corresponding direction. Change of position change.

[0062] In addition, the specific installation steps of the fender disclosed in the present invention are as follows:

[0063] After the engine room side fender split tooling is assembled in place on the vehicle, the fender is assembled, and the door side fixture is placed after the fender is pre-assembled;

[0064] Push the fender backward to ensure that it fits with the front door gap block in the X direction, and tighten the bolts of the fourth Y-direction mounting point 1-4 of the fender, the fifth Y-direction mounting point 1-5 of the fender, and the third Y-direction mounting point 1-3 of the fender;

[0065] In addition, gently push the fender along the Y direction to ensure that it fits the Y direction surface of the fixture, and then install the bolts of the first Z direction mounting point 3-1 of the fender and the second Z direction mounting point of the fender;

[0066] Then, assemble the bolts at the first Y-direction mounting point 1-1 of the fender and the second Y-direction mounting point 1-2 of the fender;

[0067] Confirm that the front door fits the fender leveling block, and install the bolts at the second X-direction mounting point 4-2 of the fender and the third X-direction mounting point 4-3 of the fender;

[0068] Remove all fixtures, close the hood, open the pre-tightening bolts at the first X-direction mounting point 4-1 of the front door fender, close the front door to confirm the surface difference between the fender and the front door, fine-tune the fender, ensure the surface difference with the front door, and then tighten the pre-tightening bolts at the first X-direction mounting point of the fender.

[0069] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A fender assembly method using a mounting bracket assembly, characterized in that ； A mounting bracket assembly for mounting a fender; comprising a Y-direction mounting bracket, a Z-direction mounting bracket and an X-direction mounting bracket; the Y-direction mounting bracket comprises a fender front bracket arranged on a headlight cross beam and a fender upper bracket arranged on a side panel assembly; the Z-direction mounting bracket comprises a fender upper mounting bracket arranged on a headlight cross beam; the X-direction mounting bracket comprises a fender rear bracket arranged on a vertical plate of a front cabin of a vehicle; The fender is mounted on the vehicle body, and the fender mounting point on the vehicle body includes a first Z-direction mounting point of the fender on the headlight crossbeam bracket; The second Z-direction mounting point of the fender is on the mounting bracket on the fender; The first Y-direction mounting point of the fender and the second Y-direction mounting point of the fender are on the front bracket of the left fender; The third Y-direction mounting point of the fender is on the bracket on the fender; the fourth Y-direction mounting point of the fender and the fifth Y-direction mounting point of the fender are arranged at the lowest end of the front cabin vertical plate; There are also three fender mounting points on the front cabin vertical plate, specifically the first X-direction mounting point of the fender, the second X-direction mounting point of the fender, and the third X-direction mounting point of the fender; the first X-direction mounting point of the fender, the second X-direction mounting point of the fender, and the third X-direction mounting point of the fender are distributed from top to bottom; The first Z-direction mounting point and the second Z-direction mounting point on the fender are φ11mm mounting holes, which are fastened with M6 bolts, and a 2.5mm adjustment margin is reserved on one side of the mounting hole; The first Y-direction mounting point, the second Y-direction mounting point, the fourth Y-direction mounting point and the fifth Y-direction mounting point have φ11mm mounting holes, which are fastened with M6 bolts, and a 2.5mm adjustment is reserved on one side; the third Y-direction mounting point has an 11mm Z-direction oblong notch, which is fastened with M6 bolts; a 2.5mm adjustment is reserved on one side in the X direction; the first X-direction mounting point, the second X-direction mounting point and the third X-direction mounting point have an 11mm X-direction oblong notch, which are fastened with M6 bolts, and a 2.5mm adjustment is reserved on one side in the Z direction; The fender assembly method includes the following assembly methods: Step 1: First, weld the Y-axis mounting bracket, Z-axis mounting bracket, and X-axis mounting bracket on the vehicle body; Step 2: After completing step 1, connect the fender to the vehicle body through the above-mentioned mounting bracket assembly; Step 3: After step 2 is completed, the installation of one fender is completed. If you need to repeat the assembly of the fender, repeat the above steps 1-2; The assembly method is used in conjunction with a welding main assembly line; After the previous fender is assembled, the assembled fender is inspected to check whether the assembly gap between the fender and adjacent components meets the design requirements. If it meets the design requirements, the subsequent fenders can be assembled according to the above assembly method; If it does not meet the design requirements; According to the test results, the actual installation position of the fender is adjusted by adjusting the welding positions between the Y-direction mounting bracket, the Z-direction mounting bracket and the X-direction mounting bracket and the vehicle body.

2. A fender assembly method using a mounting bracket assembly according to claim 1, characterized in that: The fender front bracket includes a front bracket body, on which a first fender assembly hole and a front bracket assembly hole are provided; the front bracket body includes a front bracket transverse plate and a front bracket longitudinal plate, and the front bracket longitudinal plate is arranged to intersect with the front bracket transverse plate; the first fender assembly hole is arranged on the front bracket longitudinal plate; the front bracket assembly hole is arranged on the front bracket transverse plate.

3. A fender assembly method using a mounting bracket assembly according to claim 2, characterized in that: The fender front bracket is provided with at least two first fender assembly holes.

4. A fender assembly method using a mounting bracket assembly according to claim 2, characterized in that: The mounting bracket assembly also includes a fender upper bracket, and the fender upper bracket includes a second fender assembly hole provided thereon.

5. A fender assembly method using a mounting bracket assembly according to claim 1, characterized in that: The fender mounting bracket includes an upper mounting bracket body, and the upper mounting bracket body is provided with a third fender assembly hole and an upper mounting bracket assembly hole; the upper mounting bracket body includes an upper mounting bracket transverse plate and an upper mounting bracket longitudinal plate, and the upper mounting bracket longitudinal plate is arranged perpendicular to the upper mounting bracket transverse plate; the third fender assembly hole is arranged on the upper mounting bracket transverse plate; the upper mounting bracket assembly hole is arranged on the upper mounting bracket longitudinal plate.

6. A fender assembly method using a mounting bracket assembly according to claim 1, characterized in that: The fender rear bracket is arranged on the vertical plate of the front cabin of the automobile; the fender rear bracket includes a rear bracket body; the rear bracket body is provided with a fourth fender assembly hole and a rear bracket assembly hole; the rear bracket body includes a rear bracket transverse plate and a rear bracket longitudinal plate, and the rear bracket longitudinal plate is arranged perpendicular to the rear bracket transverse plate; the fourth fender assembly hole is arranged on the rear bracket longitudinal plate; the rear bracket assembly hole is arranged on the rear bracket transverse plate.

7. A fender assembly method using a mounting bracket assembly according to claim 6, characterized in that: The mounting bracket assembly includes a plurality of fender rear brackets; the plurality of fender rear brackets are arranged longitudinally along the front cabin vertical plate.

8. A fender assembly method using a mounting bracket assembly according to claim 1, characterized in that: The fender is provided with a mounting portion connected to the mounting bracket assembly.

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