A welding positioning device for modified vehicles

Abstract

The present invention relates to the field of welding equipment, and specifically to a new type of welding positioning device for modified vehicles, which includes a chassis capable of moving and steering, a handle for manipulating the movement or steering of the chassis, and a fixing assembly for clamping a spoiler and pressing the spoiler onto a rear box cover; a positioning plate for abutting against the bottom of the rear end of a vehicle to be modified is provided on the front side of a first bottom plate; a first telescopic member for driving a base frame to move up and down is installed above the first bottom plate, and a connecting member includes a front side vertical plate for abutting against the rear side of the rear end of the vehicle; a pair of clamping members with adjustable clamping distances and capable of clamping the left and right sides of the rear end of the vehicle to be modified are installed on the base frame; a third telescopic member for driving the fixing assembly to rise and fall is installed on the top of the first horizontal plate. The existing manual welding positioning method has the problem of inaccurate positioning, and the new type of welding positioning device for modified vehicles provided by the present invention has more accurate positioning during welding.

Description

Technical Field

[0001] The present invention relates to the field of welding equipment, and particularly to a welding positioning device for modified vehicles. Background Art

[0002] A spoiler (also known as a car wing, car spoiler or car spoiler wing) is part of a car's aerodynamic kit. Its function is to block the airflow rushing down from the roof to form a downward acting force to offset part of the aerodynamic lift, thereby increasing the ground adhesion of the wheels. It can reduce the lift at the rear of the vehicle (simply referred to as the rear of the car), and avoid problems such as excessive vehicle steering, reduced rear-wheel grip, and poor high-speed stability that are likely to occur when the lift at the rear of the car is greater than the lift at the front of the car.

[0003] People will modify vehicles without a spoiler into modified vehicles with a spoiler. The spoiler is usually welded to the rear trunk lid of the vehicle. Therefore, during welding, it is necessary to manually fix the spoiler on the rear trunk lid of the vehicle to be modified for positioning. The accuracy of the entire welding completely depends on manual operation. If the position of the spoiler changes due to reasons such as judgment error or fatigue of the staff, it will directly affect the welding accuracy.

[0004] Therefore, the existing method of manual welding positioning has the problem of inaccurate positioning. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a welding positioning device for modified vehicles with relatively accurate positioning.

[0006] In order to solve the above technical problems, the present invention provides a modified vehicle welding positioning device comprising a chassis that can move and steer, a handle for manipulating the movement or steering of the chassis, and a fixing component for clamping a spoiler and pressing the spoiler on a rear box cover; a U-shaped base frame with an adjustable height and an opening facing upward is installed on the top of the chassis; the base frame comprises a first bottom plate and two vertical plates, and a positioning plate for abutting against the bottom of the rear end of the vehicle to be modified is arranged on the front side of the first bottom plate; a first telescopic member for driving the base frame to move up and down is installed above the first bottom plate, a hole is provided on the first bottom plate for the telescopic end of the first telescopic member to pass through, at least four second lead rods are fixedly installed on the top of the chassis, and the first bottom plate is provided with a second passage for the second lead rod to pass through, the shape, number and size of which match the second lead rod The second connecting disc is vertically installed on the top of the second lead rod, and the second connecting disc is connected to the first bottom plate through the second return spring; a connecting piece is arranged between the tops of the two vertical plates of the base frame, and the connecting piece includes a front vertical plate for contacting the rear side of the rear of the vehicle; an L-shaped connecting piece is fixedly installed on the connecting piece, and the L-shaped connecting piece includes a first horizontal plate and a vertical plate perpendicular to each other, and support plates are respectively installed on the left and right sides of the bottom of the first horizontal plate; a pair of clamping pieces with adjustable clamping distance and capable of clamping the left and right sides of the rear of the vehicle to be modified are installed on the base frame, and a second telescopic piece for driving a pair of clamping pieces to clamp or release is installed on the rear side of the vertical plate, and the second telescopic piece is connected to the pair of clamping pieces through the second transmission piece; a third telescopic piece for driving the fixed assembly to rise and fall is installed on the top of the first horizontal plate. Welding positioning is achieved by adjusting the positioning in the front and back, up and down, and left and right directions, and free and fast movement is achieved through the handle and the chassis.

[0007] As a further improvement of the present invention: the chassis includes a base plate, and wheels are rotatably mounted on the left and right sides of the rear of the base plate; universal wheel seats capable of synchronous steering are respectively mounted on the left and right sides of the front of the base plate, and wheels are rotatably mounted in the universal wheel seats; the handle includes an L-shaped rod, and a gear is fixedly mounted on the front end of the horizontal section of the L-shaped rod, and the central axis of the gear is perpendicular to the horizontal section; the gear is rotatably mounted on the top of the chassis. Preferably, circular holes are respectively opened on the left and right sides of the front of the base plate, and two universal wheel seats are rotatably mounted in the two circular holes. Preferably, the gear is synchronously transmitted and connected with the two universal wheel seats through a first transmission member. Preferably, the universal wheel seat comprises a hollow tube body with openings on two opposite sides rotatably mounted in a circular hole; an annular groove is provided on the inner wall of the circular hole, and a circle of annular slider matching the annular groove is provided on the outer surface of the tube body; a small circular plate is fixedly installed in the tube body, the small circular plate is perpendicular to the central axis of the tube body, a long hole is provided on the small circular plate, and the wheel is rotatably mounted in the long hole; the first transmission member comprises an outer gear ring fixedly sleeved on the two outer tube bodies respectively, and a rack that can slide left and right on the top of the base plate and mesh with the two outer gear rings at the same time, and a small rack meshing with the gear is fixedly installed on the side of the rack close to the gear. The universal wheel seat is driven to rotate by the gear, the small rack, and the rack, so that the steering of the device can be achieved by turning the handle.

[0008] As a further improvement of the present invention: the clamping member includes a left clamping member and a right clamping member, and the left clamping member and the right clamping member both include a first straight rod that can slide left and right, and the rear end of the first straight rod is rotatably connected to the second transmission member; the front end of the first straight rod is installed with an L-shaped clamping arm, and the opposite surfaces of the two L-shaped clamping arms are provided with a clamping block for contacting the left or right side of the rear end of the vehicle. Preferably, support plates are provided on both sides of the first horizontal plate; at least two first lead rods are vertically installed on the surface of the two first straight rods close to the vertical plate, and the vertical plate and the support plate are provided with first through holes for the first lead rods to pass through, which are matched with the number, shape and size of the first lead rods; the end of the first straight rod away from the L-shaped clamping arm is vertically installed with a first connecting disc, and the first connecting disc is connected to the support plate respectively through a first return spring. Preferably, the second transmission member includes a sliding plate that can slide up and down driven by the second telescopic member, and the left and right sides of the sliding plate are rotatably installed with connecting rods, and the two connecting rods are rotatably connected to the rear ends of the two first straight rods respectively.

[0009] As a further improvement of the present invention: The fixing component includes a pair of columns fixedly installed on the left and right sides of the top of the first horizontal plate. The top of the pair of columns is fixedly installed with a second horizontal plate. The bottom of the second horizontal plate is fixedly installed with a third telescopic member. The telescopic end of the third telescopic member penetrates through the second horizontal plate and extends out from the top of the second horizontal plate. The top of the telescopic end is fixedly installed with a spoiler clamping member for clamping the spoiler; The spoiler clamping member includes a third horizontal plate installed on the top of the telescopic end. At least three mutually parallel first inclined plates that are inclined forward are vertically installed on the top of the third horizontal plate. A second inclined plate is fixedly installed on the front sides of the at least three first inclined plates. A third inclined plate is vertically installed on the top of the front side of the second inclined plate. A clamping protrusion for clamping the spoiler is provided on the surface of the third inclined plate that contacts the spoiler. A small baffle is installed at the bottom of the third inclined plate. Arc-shaped pressing plates for pressing the spoiler against the trunk lid are installed on both the left and right sides of the third inclined plate. Preferably, a pressing block for clamping the fixing component and the spoiler together and a fourth telescopic member for driving the pressing block to loosen or clamp the spoiler are installed on the fixing component.

[0010] The beneficial effects of the present invention are as follows: The welding positioning device for a modified vehicle provided by the present invention has relatively accurate positioning during welding. Through the chassis and the handle, the device can be turned and moved relatively easily. Through the fixing component, the device can clamp the spoiler and press the spoiler against the rear trunk lid, reducing the probability of the spoiler shifting, thereby improving the positioning accuracy. Through the cooperation of the positioning plate on the base frame that can be lifted and the fixing component that can be lifted, the positioning of the spoiler in the height direction can be completed. Through the clamping member, the positioning of the spoiler in the left and right directions can be achieved. Through the front vertical plate that abuts against the rear side of the vehicle tail, the positioning of the spoiler in the front and rear directions can be achieved. By restricting the position of the spoiler in these three directions, it is no longer necessary for workers to manually hold the spoiler during welding, greatly improving the positioning accuracy and thus the welding precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the overall structural schematic diagram of the present invention and the spoiler;

[0012] Figure 2 is the front view of the present invention;

[0013] Figure 3 is the overall structural schematic diagram of the present invention and the spoiler from another angle;

[0014] Figure 4 is the overall structural schematic diagram of the present invention and the spoiler from the right view angle;

[0015] Figure 5 is the schematic diagram of the positional relationship among the present invention, the spoiler and the vehicle;

[0016] Figure 6 This is the assembly drawing of the chassis and the handle in the present invention;

[0017] Figure 7 This is the overall structural schematic diagram of the pipe body and the external gear ring in the present invention;

[0018] Figure 8 This is the overall structural schematic diagram of the universal wheel seat and the wheel in the present invention;

[0019] Figure 9 This is the partial structural schematic diagram of the chassis in the present invention;

[0020] Figure 10 This is the overall structural schematic diagram of the handle in the present invention;

[0021] Figure 11 This is the assembly drawing of the base frame, the clamping member, the second telescopic member and the second transmission member in the present invention;

[0022] Figure 12 This is the assembly drawing of the base frame, the clamping member, the L-shaped connecting member, the second telescopic member and the second transmission member in the present invention;

[0023] Figure 13 This is the assembly drawing of the clamping member, the L-shaped connecting member, the second telescopic member and the second transmission member in the present invention;

[0024] Figure 14 This is the schematic diagram of the positional relationship among the partial structure of the chassis, the base frame, the first telescopic member, etc. in the present invention;

[0025] Figure 15 This is the overall structural schematic diagram of the connecting member in the present invention;

[0026] Figure 16 This is the assembly drawing of the base frame and the connecting member in the present invention;

[0027] Figure 17 This is the overall structural schematic diagram of the L-shaped connecting member in the present invention;

[0028] Figure 18 This is the schematic diagram of the positional relationship among the fixing member, the pressing block, the fourth telescopic member, the column, the third telescopic member, the L-shaped connecting member, etc. in the present invention;

[0029] Figure 19 This is the schematic diagram of the positional relationship among the fixing member, the pressing block, the fourth telescopic member, the column, the third telescopic member, the L-shaped connecting member, etc. from another angle in the present invention;

[0030] Figure 20 This is the overall structural schematic diagram of the fixing member in the present invention;

[0031] Figure 21 This is the overall structural schematic diagram of the fixing member from another angle in the present invention;

[0032] Figure 22 Schematic diagram of the overall structure of the fixing member, pressing block and fourth telescopic member in the present invention;

[0033] The names of the components corresponding to the respective marks in the above drawings are: 1, chassis; 101, substrate; 102, strip-shaped hole; 103, wheel; 104, round hole; 1041, annular sliding groove;

[0034] 2, handle; 201, L-shaped rod; 202, pull ring; 203, gear; 204, rotating shaft;

[0035] 3, base frame; 301, first bottom plate; 302, vertical plate; 303, positioning plate;

[0036] 401, first telescopic member; 402, second telescopic member; 4021, third connecting disc; 403, third telescopic member; 404, fourth telescopic member;

[0037] 5, universal wheel seat; 501, pipe body; 502, small round plate; 503, long hole;

[0038] 6, connecting member; 601, front vertical plate; 602, soft rubber pad; 603, middle vertical plate; 604, rear vertical plate;

[0039] 7, L-shaped connecting member; 701, first horizontal plate; 702, vertical plate; 703, support plate;

[0040] 8A, left clamping member; 8B, right clamping member; 801, first straight rod; 802, L-shaped clamping arm; 803, clamping block; 804, first lead screw; 805, first connecting disc; 806, first return spring;

[0041] 9, fixing assembly; 901, column; 902, second horizontal plate; 903, third horizontal plate; 904, first inclined plate; 905, second inclined plate; 906, third inclined plate; 907, clamping projection; 908, baffle; 909, arc-shaped pressing plate;

[0042] 10, pressing block;

[0043] 1101, external gear ring; 1102, rack; 1103, small rack;

[0044] 12, spoiler;

[0045] 1301, sliding plate; 1302, connecting rod; 1303, contact plate; 1304, sliding track; 1305, first small rotating shaft; 1306, second small rotating shaft;

[0046] 1401, second lead screw; 1402, second connecting disc; 1403, second return spring. Detailed implementation manners

[0047] The following further elaborates in detail on the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0048] Definitions of relevant terms involved in the present invention:

[0049] (1) In the present invention, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. are all based on Figure 2 the defined direction.

[0050] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, the welding positioning device for a modified vehicle provided by the present invention includes a chassis 1 capable of moving and steering, a handle 2 for controlling the movement or steering of the chassis 1, and a fixing component 9 for clamping a spoiler 12 and pressing the spoiler 12 against the rear trunk lid.

[0051] As Figure 1 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10As shown, the chassis 1 includes a base plate 101, and strip holes 102 are symmetrically opened on the left and right sides of the rear of the base plate 101, and wheels 103 are rotatably installed in the strip holes 102, and the wheel axles of the wheels 103 are arranged horizontally. Universal wheel seats 5 capable of synchronous steering are installed on the left and right sides of the front of the base plate 101, and wheels 103 are rotatably installed in the universal wheel seats 5. Round holes 104 are opened on the left and right sides of the front of the base plate 101, and two universal wheel seats 5 are rotatably installed in the two round holes 104. The handle 2 includes an L-shaped rod 201, and the upper end of the vertical section of the L-shaped rod 201 has a bent portion bent outward, and a pull ring 202 is arranged on the top of the vertical section for people to pull, and a gear 203 is fixedly installed at the front end of the horizontal section of the L-shaped rod 201, and the central axis of the gear 203 is perpendicular to the horizontal section. A reinforcing rod is fixedly installed at the symmetric axis in the left and right directions of the chassis 1, and a groove is provided on the rear side of the reinforcing rod. The gear 203 is rotatably installed in the groove of the reinforcing rod at the top of the chassis 1 through a rotating shaft 204. The central axis of the rotating shaft 204 is perpendicular to the horizontal section, and the center point of the gear 203 and the center point of the chassis 1 are located on the same vertical line. The top of the chassis 1 is also provided with parallel rotation limit rods for limiting the rotation angle of the handle 2 at the left and right ends of the horizontal section of the L-shaped rod 201. The gear 203 is synchronously connected to the two universal wheel seats 5 through a first transmission member. The universal wheel seat 5 includes a hollow tube body 501 rotatably installed in the circular hole 104 and opened on opposite sides. An annular groove 1041 is provided on the inner wall of the circular hole 104, and an annular slider matching the annular groove is provided on the outer surface of the tube body 501. A small circular plate 502 is fixedly installed in the tube body 501, and the small circular plate 502 is perpendicular to the central axis of the tube body 501. A long hole 503 is provided on the small circular plate 502, and the wheel 103 is rotatably installed in the long hole 503. The first transmission member includes an outer gear ring 1101 fixedly sleeved on the outside of the two tube bodies 501 and a rack 1102 that can slide left and right on the top of the base plate 101 and mesh with the two outer gear rings 1101 at the same time. A small rack 1103 meshing with the gear 203 is fixedly installed on the side of the rack 1102 close to the gear 203.

[0052] If Figure 1 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 、 Figure 16 、 Figure 17As shown in the figure, a U-shaped base frame 3 with an adjustable height and an upward opening and a first telescopic member 401 for driving the base frame 3 to move up and down are installed on the top of the chassis 1. At least four second lead screws 1401 are fixedly installed on the top of the chassis 1. Second through holes for the second lead screws 1401 to pass through, which are identical in shape, number, and size to the second lead screws 1401, are formed in the first bottom plate 301. Second connecting discs 1402 are vertically installed at the tops of the second lead screws 1401, and the second connecting discs 1402 are connected to the first bottom plate 301 through second return springs 1403. The base frame 3 includes a first bottom plate 301 and two vertical plates 302. A positioning plate 303 for abutting against the bottom of the rear of the vehicle to be refitted and for limiting the up-and-down movement of the base frame 3 is provided on the front side of the first bottom plate 301. A connecting member 6 is provided between the tops of the two vertical plates of the base frame 3. The connecting member 6 has a U-shaped structure and includes a second bottom plate, a rear vertical plate 604 perpendicular to the second bottom plate, and a front vertical plate 601 perpendicular to the second bottom plate and for abutting against the rear side of the vehicle tail. A middle vertical plate 603 is vertically installed at the symmetry axis in the front-back direction of the second bottom plate. A soft rubber pad 602 is provided on the surface of the front vertical plate 601 in contact with the rear side of the vehicle tail to be refitted. An L-shaped connecting member 7 is fixedly installed on the connecting member 6. The L-shaped connecting member 7 includes a first horizontal plate 701 and a vertical plate 702 that are perpendicular to each other. Support plates 703 are respectively installed on the left and right sides of the bottom of the first horizontal plate 701. The first horizontal plate 701 is in contact with the top of the connecting member 6, and the vertical plate 702 is in contact with the rear vertical plate of the connecting member 6. A positioning assembly for positioning the base frame 3 in the left-right direction is installed on the base frame 3 and the L-shaped connecting member 7. The positioning assembly includes a pair of clamping members that are symmetrically arranged on the left and right sides of the base frame 3 and the L-shaped connecting member 7 and whose clamping distance can be adjusted to clamp the left and right sides of the rear of the vehicle to be refitted. A second telescopic member 402 for driving the pair of clamping members to clamp or loosen is installed on the rear side of the vertical plate 702. A third connecting disc 4021 is installed at the top end of the telescopic rod of the second telescopic member 402. The second telescopic member 402 is connected to the pair of clamping members through a second transmission member. The clamping members include a left clamping member 8A and a right clamping member 8B. Both the left clamping member 8A and the right clamping member 8B include first straight rods 801 that can slide left and right. The rear ends of the first straight rods 801 are rotatably connected to the second transmission member. L-shaped clamping arms 802 are installed at the front ends of the first straight rods 801. Clamping blocks 803 for abutting against the left or right side of the vehicle tail are provided on the opposite surfaces of the two L-shaped clamping arms 802. The clamping blocks 803 are all made of elastic rubber or silica gel. Support plates 703 are provided on both sides of the first horizontal plate 701. At least two first lead screws 804 are vertically installed on the surfaces of the two first straight rods 801 close to the vertical plate 302. First through holes for the first lead screws 804 to pass through, which are identical in number, shape, and size to the first lead screws 804, are formed in the vertical plate 302 and the support plates 703.One end of the first straight rod 801 far from the L-shaped clamping arm 802 passes through the vertical plate 302 and the support plate 703 in sequence. At one end of the first straight rod 801 far from the L-shaped clamping arm 802, first connecting circular plates 805 are vertically installed. The first connecting circular plates 805 and the support plate 703 are respectively connected by first return springs 806. The second transmission member includes a sliding plate 1301 that can slide up and down driven by the second telescopic member 402. On the rear side of the vertical plate 702, a sliding track 1304 for the sliding plate 1301 to slide is provided. On the left and right sides of the sliding plate 1301, connecting rods 1302 are rotatably installed through first small rotating shafts 1305. The two connecting rods 1302 are respectively rotatably connected to the rear ends of the two first straight rods 801 through second small rotating shafts 1306. On the rear side surface of the sliding plate 1301, two contact plates 1303 for contacting the third connecting circular plate 4021 are vertically installed.

[0053] As Figure 1 , Figure 18 , Figure 19 , Figure 20 , Figure 21 , Figure 22 shown, at the front end of the top of the first horizontal plate 701, a third telescopic member 403 for driving the fixing component 9 to lift is installed. The fixing component 9 includes a pair of upright columns 901 fixedly installed on the left and right sides in front of the top of the first horizontal plate 701. At the top of the pair of upright columns 901, a second horizontal plate 902 is fixedly installed. At the bottom of the second horizontal plate 902, the telescopic end of the third telescopic member 403 penetrates through the second horizontal plate 902 and extends out from the top of the second horizontal plate 902. At the top of the telescopic end, a spoiler clamping member for clamping the spoiler 12 is fixedly installed. The spoiler clamping member includes a third horizontal plate 903 installed at the top of the telescopic end. In each of the pair of upright columns 901, a third lead screw is slidably installed. The top ends of the two third lead screws are fixedly connected to the bottom of the third horizontal plate 903. The bottom ends of the two third lead screws are connected to the inner bottom of the upright column through third return springs (not shown in the figure). At the top of the third horizontal plate 903, at least three mutually parallel first inclined plates 904 inclined forward are vertically installed. The front side surfaces of the at least three first inclined plates 904 are jointly fixedly installed with a second inclined plate 905. At the top of the front side surface of the second inclined plate 905, a third inclined plate 906 is vertically installed. On the surface of the third inclined plate 906 in contact with the spoiler 12, a clamping protrusion 907 for clamping the spoiler 12 is provided. A small baffle 908 is installed at the bottom of the third inclined plate 906. Arc-shaped pressing plates 909 for pressing the spoiler 12 against the carriage cover are installed on the left and right sides of the third inclined plate 906. A pressing block 10 for clamping the fixing component 9 and the spoiler 12 and a fourth telescopic member 404 for driving the pressing block 10 to loosen or clamp the spoiler are installed on the fixing component 9.

[0054] The first telescopic member 401, the second telescopic member 402, the third telescopic member 403, and the fourth telescopic member 404 are all cylinders or electric push rods.

[0055] The working principle of the present invention is as follows: After the vehicle to be refitted is parked, the device in the initial state is taken out. At this time, the telescopic end of the first telescopic member 401 is in the shortened state, the second return spring 1403 is in the natural elongation state, and the bottom of the first bottom plate 301 is in contact with the top of the reinforcing rod. The telescopic rod of the second telescopic member 402 is in the extended state, and the third connecting disc 4021 installed at the top of the telescopic rod is far from the bottom of the contact plate 1303. The sliding plate 1301 is located at the bottom of the sliding track 1304, the first return spring 806 is in the natural elongation state, the distance between the two first straight rods 801 and the two vertical plates 702 is the closest to each other, and the distance between a pair of clamping members is the shortest. The telescopic end of the third telescopic member 403 is in the shortened state, and the distance between the first horizontal plate 701 and the second horizontal plate 902 is the closest. The telescopic end of the fourth telescopic member 404 is in the shortened state, and the bottom of the pressing block 10 is in contact with the top of the small baffle 908 of the third inclined plate 906. The volume of the device is in the smallest state.

[0056] The fourth telescopic member 404 is activated, and the telescopic end of the fourth telescopic member 404 extends. The distance between the pressing block 10 and the third inclined plate 906 reaches the maximum value. The spoiler 12 is placed, and the clamping protrusion 907 is inserted into the gap on the spoiler 12. The small baffle 908 plays a supporting role for the spoiler 12. The two arc-shaped pressing plates 909 are respectively in contact with the tops of both sides of the spoiler 12. The telescopic end of the fourth telescopic member 404 shortens until the pressing block 10 presses the spoiler 12 against the third inclined plate 906.

[0057] Activate the third telescopic member 403. The telescopic end of the third telescopic member 403 extends to the maximum value, and the distance between the first horizontal plate 701 and the second horizontal plate 902 is the farthest, causing the fixing assembly 9 to be in the highest position. Activate the second telescopic member 402. The telescopic rod of the second telescopic member 402 shortens, and the third connecting disc 4021 gradually approaches the bottom of the contact plate 1303. The contact plate 1303 drives the sliding plate 1301 to slide upward on the rear side of the vertical plate 702. One end of each of the two connecting rods 1302 close to the contact plate 1303 rotates around the first small rotating shaft 1305, and one end of each of the two connecting rods 1302 away from the contact plate 1303 rotates around the second small rotating shaft 1306. The height of the ends of the two connecting rods 1302 close to the contact plate 1303 gradually increases until they are on the same horizontal plane as the ends of the two connecting rods 1302 away from the contact plate 1303. During the process of the height of the ends of the two connecting rods 1302 close to the contact plate 1303 gradually increasing, the two first straight rods 801 are respectively slid away from the vertical plate 302 by the two connecting rods 1302. The two first straight rods 801 respectively drive the first lead screw 804 to slide away from the vertical plate 302. The first return spring 806 is in a compressed state. When the distance between the two first straight rods 801 and the two vertical plates 702 is the farthest, the distance between a pair of clamping members reaches the maximum value.

[0058] Grip the pull ring 202 and drive the chassis 1 through the L-shaped rod 201. The four wheels 103 start to roll. During the movement, if it is necessary to change the forward direction of the chassis 1, then rotate the L-shaped rod 201 in different directions through the pull ring 202. When the L-shaped rod 201 rotates, the gear 203 will start to rotate and drive the small rack 1103 to slide. The small rack 1103 drives the rack 1102 to slide. The rack 1102 drives the two outer gear rings 1101 meshing with the rack 1102 to start rotating in the same direction. The outer gear ring 1101 drives the tube body 501 to rotate. The annular slider rotates in the annular chute. The tube body 501 drives the small round plate 502 to rotate, thereby driving the orientation of the wheels 103 to change and completing the forward direction of the chassis 1. After approaching the rear of the vehicle, move the device left and right so that the axis of symmetry of the device in the left-right direction is on the same straight line as the axis of symmetry of the modified vehicle in the left-right direction. Then push the device forward so that the soft rubber pad 602 abuts against the rear side of the vehicle tail, and the front-rear positioning of the spoiler 12 is completed.

[0059] Activate the second telescopic member 402. The telescopic rod of the second telescopic member 402 gradually extends. The sliding plate 1301 slides downward on the rear side of the vertical plate 702. One ends of the two connecting rods 1302 close to the contact plate 1303 rotate around the first small rotating shaft 1305 respectively, and the other ends of the two connecting rods 1302 away from the contact plate 1303 rotate around the second small rotating shaft 1306 respectively. The height of the one ends of the two connecting rods 1302 close to the contact plate 1303 gradually decreases. During the process of the height of the one ends of the two connecting rods 1302 close to the contact plate 1303 gradually decreasing, the two first straight rods 801 are respectively slid by the two connecting rods 1302 towards the direction close to the vertical plate 302, and the first return spring 806 gradually extends. The distance between a pair of clamping members gradually shrinks until the two clamping blocks 803 are respectively abutted against the left side and the right side of the vehicle tail, completing the positioning of the spoiler 12 in the left-right direction.

[0060] Activate the first telescopic member 401. The first telescopic member 401 gradually extends, driving the base frame 3 to move upward. The second return spring 1403 is gradually compressed until the positioning plate 303 abuts against the bottom of the vehicle tail of the vehicle to be refitted. Activate the third telescopic member 403. The telescopic end of the third telescopic member 403 shortens, driving the fixing assembly 9 to move downward until the bottom of the spoiler 12 contacts the top of the car rear cover. At this time, the positioning of the spoiler 12 in the up-down direction is completed. Thus, the positioning of the spoiler 12 is completed and welding can begin.

[0061] After welding is completed, the telescopic end of the fourth telescopic member 404 extends, increasing the distance between the pressing block 10 and the third inclined plate 906. The telescopic rod of the second telescopic member 402 shortens, increasing the distance between a pair of clamping members. Move the device backward. The telescopic end of the first telescopic member 401 shortens, and the second return spring 1403 gradually returns to the natural elongation state. The base frame 3 moves downward, and the bottom of the first bottom plate 301 contacts the top of the reinforcing rod. The telescopic rod of the second telescopic member 402 extends until the distance between a pair of clamping members reaches the minimum value. The telescopic end of the third telescopic member 403 shortens until the distance between the first horizontal plate 701 and the second horizontal plate 902 reaches the minimum value. The telescopic end of the fourth telescopic member 404 shortens until the distance between the pressing block 10 and the third inclined plate 906 reaches the minimum value. Thus, the device returns to the initial state and is stored for the next use after being put away.

[0062] It should be noted that the present invention is not limited to the specific structures shown in the accompanying drawings in the above embodiments, and various changes can be made within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A welding positioning device for a modified vehicle, characterized in that: It comprises a chassis (1) capable of movement and steering, a handle (2) for manipulating the chassis (1) to move or steer, and a fixing component (9) for clamping a spoiler (12) and pressing the spoiler (12) onto a rear box cover; A U-shaped base frame (3) with an adjustable height and an opening facing upward is installed on the top of the chassis (1); The base frame (3) comprises a first bottom plate (301) and two vertical plates (302); a positioning plate (303) for contacting the bottom of the rear end of the vehicle to be modified is arranged on the front side of the first bottom plate (301); a first telescopic member (401) for driving the base frame (3) to move up and down is installed above the first bottom plate (301); a hole is provided on the first bottom plate (301) for the telescopic end of the first telescopic member (401) to pass through; at least four second lead rods (1401) are fixedly installed on the top of the chassis (1); the first bottom plate (301) is provided with a first telescopic member (401) having a shape, number and size similar to that of the first telescopic member (401); A second through hole for the second lead rod (1401) to pass through is matched with the second lead rod (1401), and a second connecting disc (1402) is vertically installed on the top of each of the second lead rods (1401), and the second connecting disc (1402) is connected to the first bottom plate (301) via a second return spring (1403); a connecting member (6) is arranged between the tops of the two vertical plates of the base frame (3), and the connecting member (6) includes a front vertical plate (601) for abutting against the rear side of the rear end of the vehicle, and a soft rubber pad (602) is arranged on the side of the front vertical plate (601) that contacts the rear side of the rear end of the vehicle to be modified; An L-shaped connecting member (7) is fixedly mounted on the connecting member (6), wherein the L-shaped connecting member (7) comprises a first horizontal plate (701) and a vertical plate (702) which are perpendicular to each other, and support plates (703) are respectively mounted on the left and right sides of the bottom of the first horizontal plate (701); A pair of clamping members with adjustable clamping distance and capable of clamping the left and right sides of the rear end of the vehicle to be modified is installed on the base frame (3); a second telescopic member (402) for driving the pair of clamping members to clamp or release is installed on the rear side of the vertical plate (702); the second telescopic member (402) is transmission-connected to the pair of clamping members via a second transmission member; the clamping members include a left clamping member (8A) and a right clamping member (8B); the left clamping member (8A) and the right clamping member (8B) both include a first straight rod (801) that can slide left and right; the rear ends of the first straight rod (801) are rotationally connected to the second transmission member; the front ends of the first straight rods (801) are each installed with an L-shaped clamping arm (802); the opposing surfaces of the two L-shaped clamping arms (802) are each provided with a clamping block (803) for abutting against the left or right side of the rear end of the vehicle; support plates (703) are each provided on both sides of the first horizontal plate (701); two At least two first lead rods (804) are vertically mounted on one surface of the first straight rod (801) close to the vertical plate (302), and first through holes for the first lead rods (804) to pass through are provided on the vertical plate (302) and the support plate (703), and the number, shape and size of the first lead rods (804) are matched with those of the first lead rods (804). A first connecting disc (805) is vertically mounted on one end of the first straight rod (801) away from the L-shaped clamping arm (802), and the first connecting disc (805) and the support plate (703) are respectively connected via a first return spring (806). The second transmission member comprises a sliding plate (1301) that can slide up and down under the drive of the second telescopic member (402), and connecting rods (1302) are rotatably mounted on the left and right sides of the sliding plate (1301), and the two connecting rods (1302) are rotatably connected to the rear ends of the two first straight rods (801) respectively. A third telescopic member (403) for driving the fixing assembly (9) to move up and down is installed on the top of the first horizontal plate (701); the fixing assembly (9) comprises a pair of columns (901) fixedly installed on the left and right sides of the top of the first horizontal plate (701); a second horizontal plate (902) is fixedly installed on the top of the pair of columns (901); a third telescopic member (403) is fixedly installed on the bottom of the second horizontal plate (902); a telescopic end of the third telescopic member (403) passes through the second horizontal plate (902) and extends from the top of the second horizontal plate (902); a spoiler plate clamping member for clamping a spoiler plate (12) is fixedly installed on the top of the telescopic end; the spoiler plate clamping member comprises a third horizontal plate (903) installed on the top of the telescopic end; at least three mutually parallel A first inclined plate (904) tilted forward, a second inclined plate (905) being fixedly mounted on the front side surfaces of at least three of the first inclined plates (904), a third inclined plate (906) being vertically mounted on the top of the front side surfaces of the second inclined plates (905), a clamping protrusion (907) for clamping with the spoiler (12) being arranged on the side of the third inclined plate (906) that contacts the spoiler (12), a small baffle (908) being mounted on the bottom of the third inclined plate (906), and arc-shaped pressing plates (909) for pressing the spoiler (12) onto the vehicle compartment cover being mounted on both left and right sides of the third inclined plate (906); a clamping block (10) for clamping the fixing assembly (9) and the spoiler (12) and a fourth telescopic member (404) for driving the clamping block (10) to loosen or clamp the spoiler are mounted on the fixing assembly (9).

2. A modified vehicle welding positioning device according to claim 1, characterized in that: The chassis (1) comprises a base plate (101), and wheels (103) are rotatably mounted on the left and right sides of the rear of the base plate (101); universal wheel seats (5) capable of synchronous steering are respectively mounted on the left and right sides of the front of the base plate (101), and wheels (103) are rotatably mounted in the universal wheel seats (5); The handle (2) comprises an L-shaped rod (201), a gear (203) being fixedly mounted on the front end of a horizontal section of the L-shaped rod (201), and a central axis of the gear (203) being perpendicular to the horizontal section; The gear (203) is rotatably mounted on the top of the chassis (1).

3. A modified vehicle welding positioning device according to claim 2, characterized in that: Circular holes (104) are respectively provided on the left and right sides of the front of the base plate (101), and the two universal wheel seats (5) are rotatably mounted in the two circular holes (104) respectively.

4. A modified vehicle welding positioning device according to claim 3, characterized in that: The gear (203) is synchronously connected to the two universal wheel seats (5) via a first transmission member.

5. A modified vehicle welding positioning device according to claim 4, characterized in that: The universal wheel seat (5) comprises a hollow tube body (501) rotatably mounted in the circular hole (104) and having openings on two opposite sides; An annular groove (1041) is provided on the inner wall of the circular hole (104); a ring of annular sliding blocks matching the annular groove is provided on the outer surface of the tube body (501); a small circular plate (502) is fixedly installed in the tube body (501); the small circular plate (502) is perpendicular to the central axis of the tube body (501); a long hole (503) is provided on the small circular plate (502); and the wheel (103) is rotatably installed in the long hole (503); The first transmission member comprises outer gear rings (1101) respectively fixedly sleeved on the outside of the two tube bodies (501) and a rack (1102) capable of sliding left and right on the top of the base plate (101) and simultaneously meshing with the two outer gear rings (1101); a small rack (1103) meshing with the gear (203) is fixedly mounted on a surface of the rack (1102) close to the gear (203).

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