Positioning device and positioning method for fender and mounting bracket

Abstract

In order to solve the problems of low fender assembly efficiency, poor consistency and symmetry, the present invention provides a positioning device and positioning method for a fender and a mounting bracket, including a mounting bracket, a first positioning frame, a positioning clamping device, a second positioning frame, a fender positioning bracket and a fender positioning block. The mounting bracket is fixedly connected to the vehicle body through the first positioning frame and the positioning clamping device, and the fender is fixedly connected to the vehicle body and the mounting bracket through the second positioning frame and the fender positioning bracket, and the gap difference between the fender and the front door is limited by the fender positioning block. The device can simultaneously complete the positioning and assembly of the mounting brackets and fenders on both sides of the vehicle body, effectively ensuring the assembly accuracy and symmetry of the fender, ensuring the gap and surface difference between the fender and surrounding parts, and improving the product quality and appearance quality of the entire vehicle.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a positioning device and a positioning method for a fender and a mounting bracket. Background Art

[0002] Fenders are the most important exterior components in the automotive industry. Their appearance quality and assembly precision directly affect the appearance quality of the entire front of the vehicle. In the existing automotive design process, the mounting brackets are usually welded parts with large cumulative welding tolerances and poor precision, resulting in poor fender assembly accuracy and consistency. Fenders are also usually assembled manually, and technicians must have extensive assembly and debugging experience. To ensure the gap and surface difference between the fender and surrounding environmental parts, the fender installation position must be repeatedly debugged, which greatly affects production efficiency and has poor consistency. In addition, the fender assembly also uses single-sided positioning installation and debugging, which makes the Y-direction (body width direction) of the left and right fenders symmetrical. Summary of the Invention

[0003] In order to solve the problems of low fender assembly efficiency, poor consistency and symmetry, the present invention provides a positioning device and method for a fender and a mounting bracket, and the technical solutions adopted are as follows:

[0004] A positioning device for a fender and a mounting bracket, characterized by comprising:

[0005] A vehicle body, wherein the vehicle body is provided with a vehicle body positioning hole and a support surface;

[0006] A mounting bracket, wherein the mounting bracket is provided with a YZ mounting surface and an XZ mounting surface, the YZ mounting surface is provided with a vehicle body mounting hole, and the XZ mounting surface is provided with a mounting bracket positioning hole and a fender mounting hole;

[0007] A first positioning frame, wherein the first positioning frame is provided with a first positioning frame locating pin and a first positioning frame support leg, wherein the first positioning frame locating pin is distributed correspondingly to the vehicle body locating hole position, and the first positioning frame support leg is distributed correspondingly to the support surface position and is cooperatively connected;

[0008] A positioning and clamping device is provided with two groups, which are symmetrically arranged on the left and right sides of the first positioning frame. The positioning and clamping device consists of a mounting seat, a mounting bracket positioning block, and a clamping mechanism. The mounting seat is fixedly connected to the lower side of one side of the first positioning frame, and the mounting bracket positioning block is fixedly connected to the mounting seat. The mounting bracket positioning block Y is fixedly connected to the outside with a mounting bracket positioning pin distributed corresponding to the position of the mounting bracket positioning hole. The clamping mechanism is fixedly connected to the outside of the mounting bracket positioning block, and is used to clamp the mounting bracket on the outer surface of the mounting bracket positioning block Y;

[0009] A second positioning frame, on which second positioning frame positioning pins and second positioning frame legs are arranged corresponding to the vehicle body positioning holes and the support surface positions;

[0010] a fender positioning bracket, comprising a first fender positioning bracket and a second fender positioning bracket fixedly connected to the second positioning frame, wherein the first fender positioning bracket is provided with a fender Z-direction positioning pin, and the second fender positioning bracket is provided with a fender Y-direction positioning pin, wherein the fender Z-direction positioning pin and the fender Y-direction positioning pin are respectively distributed corresponding to the positions of the Z-direction positioning hole and the Y-direction positioning hole on the fender;

[0011] The fender positioning block is composed of a positioning plate, a profiling block, a gap pin and a fixing piece. The profiling block is fixedly connected to the positioning plate and the inner side is distributed in contact with the fender and the outer wall of the vehicle door. There are at least two groups of profiling blocks. The gap pin is located between two adjacent groups of profiling blocks and is fixedly connected to the positioning plate. One end of the fixing piece is fixedly connected to the positioning plate or the profiling block, and the other end is fixedly connected to the fender and the outer wall of the vehicle door.

[0012] Furthermore, the fender positioning blocks are provided in three groups from top to bottom along the height direction.

[0013] Furthermore, the fender positioning block includes a first fender positioning block, a second fender positioning block and a third fender positioning block. The positioning plate of the first fender positioning block is fixedly connected to the fender positioning bracket. The fixing part of the first fender positioning block is a suction cup. The fixing parts of the second fender positioning block and the third fender positioning block are magnets.

[0014] Furthermore, the clamping mechanism includes a clamp, a clamping rod, and a clamping block. The fixed part of the clamp is fixedly connected to the mounting bracket positioning block, the clamping rod is fixedly connected to the movable end of the clamp, and the clamping block is fixedly connected to the clamping rod and is arranged opposite to the outward side surface of the mounting bracket positioning block Y.

[0015] A positioning method based on the positioning device of the fender and the mounting bracket is characterized by comprising the following steps:

[0016] S1. The first positioning frame is temporarily fixed above the vehicle body by means of the first positioning pin and the positioning hole of the vehicle body, the first positioning frame leg and the supporting surface;

[0017] S2. The XZ mounting surface of the mounting bracket is connected to the mounting bracket positioning pin along the Y direction of the vehicle body through the mounting bracket positioning hole, and the XZ mounting surface of the mounting bracket is clamped to the mounting bracket positioning block by a clamping mechanism, and the YZ mounting surface is fixedly connected to the vehicle body;

[0018] S3. Remove the first positioning frame, and temporarily connect the second positioning frame to the body through the positioning structure;

[0019] S4. Install and position the fender using the Z- and Y-direction locating pins on the fender locating bracket. Install the fender locating block to the outside of the gap between the fender and the front door. The contoured block of the fender locating block fits and secures the fender and the front door. The gap pins on the fender locating block control and adjust the gap between the fender and the front door.

[0020] The beneficial effects of the present invention are:

[0021] 1. The mounting bracket is fixed to the left and right sides of the vehicle body through the first positioning frame. The mounting bracket is positioned and assembled by the first positioning frame and positioning clamping device to improve assembly accuracy. The fender is fixedly connected to the mounting bracket and the vehicle body through the second positioning frame. The position of the fender on the vehicle body is ensured by the fender positioning bracket, and the clearance between the fender and the front door is ensured by the fender positioning block. This effectively improves the fender installation accuracy, installation symmetry and consistency, and reduces assembly difficulty and improves efficiency.

[0022] 2. The mounting bracket is provided with a YZ mounting surface and an XZ mounting surface. The body mounting holes provided on the YZ mounting surface can absorb the welding deviation at the body fixing holes, thereby simplifying the welding process requirements. The XZ mounting surface is used to cooperate with the clamping mechanism on the mounting bracket positioning device to fix the position of the mounting bracket, ensure the installation position of the fender, and solve the problem of poor welding accuracy and consistency of the mounting bracket.

[0023] 3. The mounting bracket is fixed to the left and right sides of the vehicle body through a positioning clamping device, which can avoid the influence of the accumulated welding tolerance of the vehicle body, effectively improve the accuracy of the mounting bracket, and ensure the installation position of the fender. Compared with the existing technology, the mounting bracket is welded to the vehicle body structure, which avoids the problem of difficult control of the accuracy of the welded mounting bracket after the accumulation of welding tolerances due to the complex welding levels, long dimensional chains and numerous parts of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the connection structure between the mounting bracket, the first positioning frame and the mounting bracket positioning device of the present invention

[0025] Figure 2 Schematic diagram of the installation bracket structure

[0026] Figure 3 for Figure 1 Top view

[0027] Figure 4 、 Figure 5 Schematic diagram of the positioning clamping device structure

[0028] Figure 6 Schematic diagram of the connection structure between the second positioning frame and the fender

[0029] Figure 7 for Figure 6 Top view

[0030] Figure 8 Schematic diagram of the connection structure between the fender, fender positioning bracket and fender positioning block

[0031] Figure 9 Schematic diagram of the fender positioning block structure

[0032] Among them, 1-body, 101-body positioning hole, 102-support surface;

[0033] 2-mounting bracket, 201-YZ mounting surface, 202-body mounting hole, 203-XZ mounting surface, 204-mounting bracket positioning hole, 205-fender mounting hole, 206-reinforcement rib, 207-flange;

[0034] 3-first positioning frame, 301-first positioning frame positioning pin, 302-first positioning frame support leg;

[0035] 4-mounting bracket positioning device, 401-mounting seat, 402-mounting bracket positioning block, 403-mounting bracket positioning pin, 404-clamp, 405-clamping rod, 406-clamping block;

[0036] 5- fender;

[0037] 6-Front door;

[0038] 7-second positioning frame, 701-second positioning frame positioning pin, 702-second positioning frame support leg,

[0039] 8-first fender positioning bracket, 801-fender Z-direction positioning pin,

[0040] 9-second fender positioning bracket, 901-fender Y-direction positioning pin;

[0041] 10-first fender positioning block, 1001-first positioning plate, 1002-first contour block, 1003-first gap pin, 1004-suction cup;

[0042] 11-second fender positioning block, 1101-second positioning plate, 1102-second contouring block, 1103-second gap pin, 1104-magnet 1;

[0043] 12-third fender positioning block, 1201-third positioning plate, 1202-third profiling block, 1203-third gap pin, 1204-magnet two. DETAILED DESCRIPTION

[0044] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0045] In the description of the invention, it should be understood that the X direction refers to the forward direction or length direction of the vehicle, the Y direction refers to the left-right direction or width direction of the vehicle, and the Z direction refers to the height direction of the vehicle. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the viewing direction or positional relationship, and are only for the convenience of describing the invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the invention.

[0046] like Figure 1-9 The positioning device of the fender and mounting bracket shown includes a mounting bracket 2, a first positioning frame 3, a mounting bracket positioning device 4, a second positioning frame 7, a fender positioning bracket, and a fender positioning block. The mounting bracket 2 is assembled on the left and right sides of the vehicle body 1 through the first positioning frame 3 and the mounting bracket positioning device 4, and the fender 5 is assembled on the position of the vehicle body 1 in front of the front door 6 through the second positioning frame 7, the fender positioning bracket and the fender positioning block.

[0047] Specifically, a group of body positioning holes 101 are respectively provided on the left and right sides of the front portion of the body 1 , and four groups of supporting surfaces 102 are distributed along the Y direction on the upper end surface.

[0048] The mounting bracket 2 is provided with a YZ mounting surface 201 and an XZ mounting surface 203. The YZ mounting surface 201 is provided with a body mounting hole 202, and the XZ mounting surface 203 is provided with a mounting bracket positioning hole 204 and a fender mounting hole 205. A reinforcing rib 206 is connected between the YZ mounting surface 201 and the XZ mounting surface 203, and a flange 207 is provided around the XZ mounting surface 203 to strengthen the rigidity of the mounting bracket 2.

[0049] The first positioning skeleton 3 has a frame-like structure as a whole. A group of first positioning skeleton locating pins 301 are respectively provided on the left and right sides of the first positioning skeleton 3. The first positioning skeleton locating pins 301 are distributed corresponding to the positions of the vehicle body locating holes 101. The first positioning skeleton 3 is also provided with four groups of first positioning skeleton legs 302 that are distributed and matched with the positions of the support surface 102. The first positioning skeleton 3 is temporarily fixed on the vehicle body 1 through the first positioning skeleton locating pins 301 matching with the vehicle body locating holes 101 and the first positioning skeleton legs 302 matching with the support surface 102.

[0050] The mounting bracket positioning device 4 is provided with two groups, which are respectively arranged at the left and right ends of the first positioning frame 3. The mounting bracket positioning device 4 consists of a mounting seat 401, a mounting bracket positioning block 402, a mounting bracket positioning pin 403, a clamp 404, a clamping rod 405 and a clamping block 406. The mounting seat 401 is fixedly connected to the left and right ends of the lower side of the first positioning frame 3, the mounting bracket positioning block 402 is fixedly connected to the lower side of the mounting seat 401, and the mounting bracket positioning pin 403 is provided with two groups and fixedly connected to the Y-outer side surface of the mounting bracket positioning block 402. The length of the mounting bracket positioning pin 403 is distributed along the Y direction. In this embodiment, the clamp 404 model is CH-12130, and its fixed part is fixedly connected to the mounting bracket positioning block 402, and the clamping rod 405 is fixedly connected to the movable part, and the clamping rod 405 has an L-shaped structure. When the clamping rod 405 is installed, it is located on the Y-outer side of the mounting bracket positioning block 402, and two groups of clamping blocks 406 are fixedly connected to the inner side surface of the clamping rod 405.

[0051] The installation method of mounting bracket 2 is as follows:

[0052] First, the first positioning frame 3 is inserted into the body positioning hole 101 on the body 1 along the Z direction through the first positioning frame positioning pin 301 to limit the displacement of the first positioning frame 3 in the X and Y directions on the body 1 and the rotation around the Z direction. At the same time, the first positioning frame 3 is fitted with the support surface 102 on the body 1 through the first positioning frame support leg 302, thereby temporarily fixing the first positioning frame 3 on the body 1.

[0053] The mounting bracket 2 passes through the mounting bracket positioning hole 204 on the XZ mounting surface 203 through the mounting bracket positioning pin 403 in the mounting bracket positioning device 4 along the Y direction. The mounting bracket positioning hole 204 and the mounting bracket positioning pin 403 cooperate to limit the movement of the mounting bracket 2 in the X and Z directions on the vehicle body 1 and the rotation around the Y direction. Moreover, the Y-direction inner side surface of the XZ mounting surface 203 of the mounting bracket 2 abuts against the Y-direction outer side surface of the mounting bracket positioning block 402, and the YZ mounting surface 201 abuts against the vehicle body 1. Then, the clamping rod 405 and the clamping block 406 are driven by the clamp 404 to press on the Y-direction outer side surface of the XZ mounting surface 203, thereby limiting the movement of the mounting bracket 2 in the Y direction and the rotation around the X and Z directions. Finally, the bolt passes through the vehicle body mounting hole 202 and is fixedly connected to the vehicle body 1, thereby finally realizing the installation and positioning of the mounting bracket 2 on the vehicle body 1.

[0054] like Figure 6-8 As shown, the second positioning skeleton 7 is a frame structure as a whole. Two groups of second positioning skeleton locating pins 701 are provided on the second positioning skeleton 7, which are distributed corresponding to the two groups of body locating holes 101 on the body 1. Four groups of second positioning skeleton legs 702 are also provided on the second positioning skeleton 7. The four groups of second positioning skeleton legs 702 are distributed corresponding to the four groups of support surfaces 102 and are connected in a coordinated manner. The second positioning skeleton 7 is inserted into the body locating holes 101 along the Z direction through the second positioning skeleton locating pins 701, thereby limiting the movement of the second positioning skeleton 7 in the X and Y directions and the rotation around the Z direction. The second positioning skeleton legs 702 are distributed in contact with the support surfaces 102, thereby temporarily fixing the second positioning skeleton 7 on the body 1.

[0055] There are two groups of fender positioning brackets, namely a first fender positioning bracket 8 and a second fender positioning bracket 9. The first fender positioning bracket 8 is fixedly connected to the upper left and right ends of the second positioning frame 7 by bolts, and a fender Z-direction positioning pin 801 is provided on the first fender positioning bracket 8. The second fender positioning bracket 9 is fixedly connected to the left and right sides of the lower front end of the second positioning frame 7 by bolts. A fender Y-direction positioning pin 901 is provided on the second fender positioning bracket 9. Z-direction positioning holes and Y-direction positioning holes are respectively provided on the upper XY plane and the lower front end XZ plane of the fender 5. The fender Z-direction positioning pin 801 is inserted into the Z-direction positioning hole in the fender 8 along the Z direction to limit the movement of the fender 5 in the X, Y and Z directions of the vehicle body 1 and the rotation around the X, Y and Z directions. The fender Y-direction positioning pin 901 is inserted into the Y-direction positioning hole on the fender 5 along the Y direction to limit the movement of the fender 5 in the Z direction of the vehicle body 1.

[0056] The fender positioning block includes a first fender positioning block 10, a second fender positioning block 11 and a third fender positioning block 12 to meet the requirements that the fender positioning blocks are distributed from top to bottom on the Y-outer side of the fender 5 and the front door 6. Specifically, the first fender positioning block 10 is composed of a first positioning plate 1001, a first profiling block 1002, a first gap pin 1003 and a suction cup 1004. The first positioning plate 1001 is fixedly connected to the left and right end portions of the second positioning frame 7. The first profiling block 1002 is provided with two groups and the inner side surfaces are profiling surfaces. The two groups of first profiling blocks 100 2 are respectively fitted with the Y-direction outer side surfaces of the fender 5 and the door 6, the first gap pin 1003 is fixedly connected to the inner side surface of the first positioning plate 1001 and is located between the two sets of first profiling blocks 1002, and one end of the suction cup 1004 is fixedly connected to the first positioning plate 1001. Moreover, in the Y direction, the length of the first gap pin 1003 is greater than the length of the suction cup 1004, and the length of the suction cup 1004 is approximately equal to the length of the first profiling block 1002. In this embodiment, the connecting rod of the suction cup 1004 is a telescopic rod with an adjustable length, which can be adjusted according to different assembly requirements; The second fender positioning block 11 is composed of a second positioning plate 1101, a second profiling block 1102, a second gap pin 1103 and a magnet 1104. The third fender positioning block 12 is composed of a third positioning plate 1201, a third profiling block 1202, a third gap pin 1203 and a magnet 2 1204. The second fender positioning block 11 and the third fender positioning block 12 have the same structure. The only difference is that they are installed at different heights at the connection between the fender 5 and the front door 6. Therefore, in this embodiment, the second fender positioning block 11 is taken as an example for detailed description. The second profiling block 12 is composed of a third positioning plate 1201, a third profiling block 1202, a third gap pin 1203 and a magnet 2 1204. There are two groups of shaping blocks 1102, which are fixed at intervals on the Y-direction inner side surface of the second positioning plate 1101, and the inner side surface of the second shaping block 1102 is provided with a shaping surface, which fits with the outer surface of the fender 5 and the front door 6 of corresponding height. The second gap pin 1103 is fixedly connected to the inner side surface of the second positioning plate 1101 and is located between the two groups of second shaping blocks 1102. The magnet 1104 is fixedly connected to the shaping surface of the inner side surface of the second shaping block 1102, and the length of the second gap pin 1103 in the Y direction is greater than the length of the second shaping block 1102.

[0057] The installation method of fender 5 is as follows:

[0058] First, the second positioning frame 7 is inserted into the vehicle body positioning hole 101 along the Z direction through the second positioning frame positioning pin 701, limiting the movement of the second positioning frame 7 in the X and Y directions of the vehicle body 1 and the rotation around the Z direction, and is connected to the support surface 102 through the second positioning frame support leg 702, thereby temporarily fixing the second positioning frame 7 on the vehicle body 1.

[0059] Then, the first fender positioning bracket 8 is inserted into the Z-direction positioning hole on the upper XY plane of the fender 5 along the Z direction through the fender Z-direction positioning pin 801. At the same time, the upper XY plane of the fender 5 abuts against the vehicle body 1, thereby limiting the movement of the fender 5 in the X, Y, and Z directions of the vehicle body 1 and the rotation around the X, Y, and Z directions. Then, the second fender positioning bracket 9 is inserted into the Y-direction positioning hole on the front XZ plane of the fender 5 along the Y direction through the fender Y-direction positioning pin 901, thereby limiting the movement of the fender 5 in the Z direction on the vehicle body 1.

[0060] Finally, the first gap pin 1103 on the first fender positioning block 10 is inserted into the gap between the fender 5 and the upper part of the front door 6, and the profiling surfaces of the two sets of first profiling blocks 1002 are respectively attached to the outer surfaces of the fender 5 and the front door 6 and sucked by the suction cup 1004; after the upper first fender positioning block 10 is fixed, the second gap pin 1103 is inserted into the gap between the fender 5 and the middle part of the front door 6, and the second profiling block 1102 is attached to the outer surfaces of the fender 5 and the front door 6 by the magnet 1104, and the third fender positioning block 12 is fixed in the same manner. The installation method of the second fender positioning block 11 will not be elaborated here. The fender positioning blocks can be set in multiple groups according to actual conditions, and except for the height of the first fender positioning block 10, the heights of the remaining fender positioning blocks can be adjusted at any time to adapt to different assembly requirements and assembly environments. This fender positioning method can effectively solve the problems of poor fender installation accuracy, poor consistency and poor symmetry, and can also simplify the assembly process, reduce labor costs, and improve production efficiency, thereby improving the fender assembly accuracy and consistency, and thus improving the quality and appearance of the entire vehicle.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A positioning device for a fender and a mounting bracket, characterized in that: include: A vehicle body, wherein the vehicle body is provided with a vehicle body positioning hole and a support surface; A mounting bracket, wherein the mounting bracket is provided with a YZ mounting surface and an XZ mounting surface, the YZ mounting surface is provided with a vehicle body mounting hole, and the XZ mounting surface is provided with a mounting bracket positioning hole and a fender mounting hole; a first positioning frame, wherein the first positioning frame is provided with a first positioning frame locating pin and a first positioning frame supporting leg, wherein the first positioning frame locating pin is distributed correspondingly to the vehicle body locating hole position, and the first positioning frame supporting leg is distributed correspondingly to the support surface position; A positioning and clamping device is provided with two groups, which are symmetrically arranged on the left and right sides of the first positioning frame. The positioning and clamping device consists of a mounting seat, a mounting bracket positioning block, and a clamping mechanism. The mounting seat is fixedly connected to the lower side of one side of the first positioning frame, and the mounting bracket positioning block is fixedly connected to the mounting seat. The mounting bracket positioning block Y is fixedly connected to the outside with a mounting bracket positioning pin distributed corresponding to the position of the mounting bracket positioning hole. The clamping mechanism is fixedly connected to the outside of the mounting bracket positioning block, and is used to clamp the mounting bracket on the outer surface of the mounting bracket positioning block Y; A second positioning frame, on which are provided second frame positioning pins and second positioning frame legs correspondingly distributed and connected to the vehicle body positioning holes and the support surface; a fender positioning bracket, comprising a first fender positioning bracket and a second fender positioning bracket fixedly connected to the second positioning frame, wherein the first fender positioning bracket is provided with a fender Z-direction positioning pin, and the second fender positioning bracket is provided with a fender Y-direction positioning pin, wherein the fender Z-direction positioning pin and the fender Y-direction positioning pin are respectively distributed corresponding to the positions of the Z-direction positioning hole and the Y-direction positioning hole on the fender; The fender positioning block is composed of a positioning plate, a profiling block, a gap pin and a fixing piece. The profiling block is fixedly connected to the positioning plate and the inner side is distributed in contact with the fender and the outer wall of the vehicle door. There are at least two groups of profiling blocks. The gap pin is located between two adjacent groups of profiling blocks and is fixedly connected to the positioning plate. One end of the fixing piece is fixedly connected to the positioning plate or the profiling block, and the other end is fixedly connected to the fender and the outer wall of the vehicle door.

2. The fender and mounting bracket positioning device according to claim 1, characterized in that: The fender positioning blocks are arranged in three groups from top to bottom along the height direction.

3. The positioning device for a fender and a mounting bracket according to claim 2, characterized in that: The fender positioning block includes a first fender positioning block, a second fender positioning block and a third fender positioning block. The positioning plate of the first fender positioning block is fixedly connected to the fender positioning bracket. The fixing part of the first fender positioning block is a suction cup. The fixing parts of the second fender positioning block and the third fender positioning block are magnets.

4. The fender and mounting bracket positioning device according to claim 1, characterized in that: The clamping mechanism includes a clamp, a clamping rod, and a clamping block. The fixed part of the clamp is fixedly connected to the mounting bracket positioning block, the clamping rod is fixedly connected to the movable end of the clamp, and the clamping block is fixedly connected to the clamping rod and is arranged opposite to the outward side surface of the mounting bracket positioning block Y.

5. A positioning method based on the positioning device of the fender and the mounting bracket according to claim 1, characterized in that: The following steps are involved: S1. The first positioning frame is temporarily fixed above the vehicle body by means of the first positioning pin and the positioning hole of the vehicle body, the first positioning frame leg and the supporting surface; S2. The XZ mounting surface of the mounting bracket is connected to the mounting bracket positioning pin along the Y direction of the vehicle body through the mounting bracket positioning hole, and the XZ mounting surface of the mounting bracket is clamped to the mounting bracket positioning block by a clamping mechanism, and the YZ mounting surface is fixedly connected to the vehicle body; S3. Remove the first positioning frame, and temporarily connect the second positioning frame to the body through the positioning structure; S4. Install and position the fender using the Z- and Y-direction locating pins on the fender locating bracket. Install the fender locating block to the outside of the gap between the fender and the front door. The contoured block of the fender locating block fits and secures the fender and the front door. The gap pins on the fender locating block control and adjust the gap between the fender and the front door.

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