Automobile body welding fixture

Abstract

The utility model discloses an automobile body welding fixture, which belongs to the technical field of welding auxiliary tools and comprises a support frame, two groups of front and rear clamping components, a support vertical plate, a connecting seat and a worm gear lead screw lifter. The two sets of front-back clamping assemblies are arranged above the two sides, in the length direction, of the supporting frame correspondingly, and each set of front-back clamping assembly at least comprises two front-back clamping mechanisms. The automobile body welding clamp is simple in structure, the supporting vertical plate is fixedly arranged at the bottom of the front-back clamping mechanism, and the worm gear lead screw lifting machine is arranged below the supporting vertical plate to support the supporting vertical plate, so that the height of the front-back clamping mechanism can be adjusted while the front-back clamping mechanism is supported, and the welding efficiency of the automobile body is improved. When the bottom of the vehicle body needs to be welded and repaired, the vehicle body can be easily supported by lifting the front clamping mechanism and the rear clamping mechanism, and therefore a worker can conveniently conduct welding and repairing operation below the bottom of the vehicle body.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary tooling, in particular to a welding fixture for automobile body welding. Background Art

[0002] As the basic structure of an automobile, the automobile body is usually formed by stamping steel plates and then welding, including parts such as the roof, floor, side wall, front wall, and rear wall of the body, forming the overall framework of the automobile and providing a protective space for the people and goods inside the vehicle.

[0003] In the process of automobile production, if there are welding defects in the body or it is found in subsequent processes that the body structure needs to be repaired, manual welding is a commonly used method. Workers can perform local welding repairs for specific problems to avoid affecting the entire body structure. Among them, the welding fixture is an important auxiliary tool for body welding.

[0004] The existing welding fixtures for automobile bodies, such as the new all-aluminum body welding positioning tooling disclosed in the Chinese patent document with the publication number of CN113560796A, although it can clamp the body in all directions, it is usually used in the continuous production of the body, and the structure of the tooling is complex. Moreover, when welding repairs need to be carried out on the bottom of the body, it is difficult to lift the body, resulting in inconvenient welding.

[0005] Obviously, the existing technology still needs to be improved and enhanced. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a welding fixture for automobile body welding, aiming to solve the problems existing in the existing welding fixtures for automobile body welding, such as complex structure, difficult to lift the body when welding repairs need to be carried out on the bottom of the body, and inconvenient welding.

[0007] To achieve the above purpose, the solution provided by the utility model is as follows:

[0008] A welding fixture for automobile body welding includes a support frame in a rectangular shape in the horizontal direction; it further includes:

[0009] Two groups of front and rear clamping components, the two groups of front and rear clamping components are respectively arranged above both sides in the length direction of the support frame, and each group of front and rear clamping components includes at least two front and rear clamping mechanisms;

[0010] A support vertical plate, the support vertical plate is vertically fixed at the bottom of the front and rear clamping mechanisms;

[0011] A connecting seat, the connecting seat is provided with a guiding hole suitable for the vertical passing of the support vertical plate, and the connecting seat is connected to the support frame;

[0012] Worm gear screw lift, the worm gear screw lift is arranged below the supporting vertical plate, and the worm gear screw lift is drivingly connected with the supporting vertical plate.

[0013] Optionally, the worm gear screw lift includes:

[0014] Circular base, the circular base is horizontally arranged on the ground;

[0015] Support cylinder, the support cylinder is vertically fixed on the circular base,

[0016] Lift body, the lift body is fixed at the upper end of the support cylinder;

[0017] Worm gear, the worm gear is rotatably arranged in the lift body, and the axial direction of the worm gear is perpendicular to the ground;

[0018] Screw rod, the screw rod vertically penetrates through the central hole of the worm gear, and the screw rod is rotatably connected with the inner wall of the central hole of the worm gear. The lower end of the screw rod is vertically movable in the support cylinder, and the upper end of the screw rod is located above the lift body;

[0019] Worm, the worm is horizontally arranged, and the worm is horizontally rotatably arranged in the lift body. The worm is in meshing transmission with the worm gear;

[0020] Pallet, the pallet is fixedly connected with the upper end of the screw rod.

[0021] Optionally, the front and rear clamping mechanism includes:

[0022] Support cross plate, the support cross plate is horizontally fixed on the support vertical plate, and the support cross plate is parallel to the wide side direction of the support frame;

[0023] First clamping plate, the first clamping plate is vertically arranged on the support cross plate, and the length direction of the first clamping plate is parallel to the length direction of the support frame;

[0024] Second clamping plate, the second clamping plate is vertically arranged on the side of the first clamping plate facing away from the support frame;

[0025] Cylinder, the cylinder is fixed on the support cross plate, and the telescopic rod of the cylinder is fixedly connected with the side of the second clamping plate facing away from the first clamping plate;

[0026] First cushion block, the first cushion block is fixedly arranged on the side of the first clamping plate facing the second clamping plate, and the first cushion block is located at the upper part of the first clamping plate;

[0027] Second cushion block, the second cushion block is arranged opposite to the first cushion block, and the second cushion block is fixedly arranged on the side of the second clamping plate facing the first clamping plate.

[0028] Optionally, the front and rear clamping mechanism further includes a guide rod perpendicularly connected to the first clamping plate; the guide rod is parallel to the telescopic rod of the air cylinder, and the guide rod passes through the second clamping plate.

[0029] Optionally, a mounting plate is fixedly provided at the bottom of the first clamping plate; a U-shaped connecting member is provided at the bottom of the supporting cross plate; the U-shaped connecting member is slidably connected to the bottom of the supporting cross plate along the length direction of the supporting cross plate; the mounting plate is perpendicular to the first clamping plate, and connecting rods are perpendicularly fixedly provided on both sides of the mounting plate; the two connecting rods are respectively detachably connected to the two ends of the U-shaped connecting member; a locking screw rod abutted against the bottom of the supporting cross plate is inserted at the bottom of the U-shaped connection.

[0030] Optionally, a first scale is provided on the top of the supporting cross plate, and the first scale is arranged along the length direction of the supporting cross plate; a second scale is provided on the supporting vertical plate, and the second scale is arranged along the height direction of the supporting vertical plate.

[0031] Optionally, the connecting seat includes:

[0032] a connecting plate, the connecting plate is connected to the support frame;

[0033] a guide cylinder, the guide cylinder is arranged vertically, and a guide hole matched with the supporting vertical plate is opened on the guide cylinder;

[0034] a reinforcing plate, the reinforcing plate is fixedly connected to both the connecting plate and the guide cylinder at the same time.

[0035] Optionally, the connecting plate is slidably connected to both the top and the bottom of the support frame, guide rail parts are formed on the outer sides of the top and the bottom of the support frame, and the guide rail parts are parallel to the length direction of the support frame.

[0036] Optionally, the connecting plate includes a vertical connecting plate and two inverted L-shaped connecting plates arranged in a mirror image, the two inverted L-shaped connecting plates are respectively arranged at the top and the bottom of the vertical connecting plate, and the inverted L-shaped connecting plates are slidably arranged on the guide rail parts.

[0037] Optionally, a third scale parallel to the guide rail part is provided on the top of the support frame.

[0038] The beneficial effects of the present utility model are as follows: The present utility model provides an automobile body welding fixture, the structure of the automobile body welding fixture is simple, by arranging a supporting vertical plate at the bottom of the front and rear clamping mechanism and arranging a worm gear screw jack below the supporting vertical plate to support the supporting vertical plate, while supporting the front and rear clamping mechanism, the height of the front and rear clamping mechanism can also be adjusted. When welding repair is needed at the bottom of the vehicle body, by lifting the front and rear clamping mechanism, it is easy to lift the vehicle body, so as to facilitate the workers to carry out welding repair work below the bottom of the vehicle body. Description of the Drawings

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the structures shown in these drawings.

[0040] Figure 1 It is a schematic structural diagram of an automobile body welding fixture provided by the present invention.

[0041] Figure 2 is Figure 1 An enlarged view of part A in

[0042] Figure 3 is Figure 1 An enlarged view of part B in

[0043] Figure 4 It is a positional relationship diagram of the worm screw lift and the support vertical plate.

[0044] Figure 5 It is a schematic structural diagram of the worm screw lift.

[0045] Figure 6 is the structural schematic of the front and rear clamping mechanism Figure 1 .

[0046] Figure 7 is the structural schematic of the front and rear clamping mechanism Figure 2 .

[0047] Figure 8 It is a schematic structural diagram of the connecting seat.

[0048] Explanation of the reference numerals in the drawings:

[0049] 1 - Support frame; 101 - Guide rail part;

[0050] 2 - Front and rear clamping mechanism; 201 - Support cross plate; 2011 - Guide groove; 202 - First clamping plate; 203 - Second clamping plate; 204 - Cylinder; 205 - First cushion block; 206 - Second cushion block; 207 - Guide rod; 208 - Mounting plate; 209 - U-shaped connecting piece; 210 - Connecting rod; 211 - Sliding part; 212 - Locking screw;

[0051] 3 - Support vertical plate;

[0052] 4 - Connecting seat; 41 - Connecting plate; 411 - Vertical connecting plate; 412 - Inverted L-shaped connecting plate; 42 - Guide cylinder; 421 - Guide hole; 43 - Reinforcing plate;

[0053] 5 - Worm gear screw lift; 51 - Circular base; 52 - Support cylinder; 53 - Lift body; 54 - Screw rod; 55 - Tray; 56 - Worm

[0054] 6 - First scale; 7 - Second scale; 8 - Third scale. Specific embodiments

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0057] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0058] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] Please refer to Figures 1 to 8 , the present invention provides an automobile body welding fixture, which can clamp the bottom of the automobile body and is thus used for welding and repairing the automobile body. Specifically, the automobile body welding fixture includes a support frame 1 in a horizontal rectangle, front and rear clamping components, a support vertical plate 3, a connecting seat 4, and a worm gear screw lift 5.

[0060] Among them, there are two sets of the front and rear clamping assemblies, and the two sets of the front and rear clamping assemblies are respectively arranged above both sides in the length direction of the support frame 1. Moreover, each set of the front and rear clamping assemblies includes at least two front and rear clamping mechanisms 2, so that the bottom of the vehicle body can be clamped by the front and rear clamping mechanisms 2, and the vehicle body can be supported. The support vertical plate 3 is vertically fixed at the bottom of the front and rear clamping mechanism 2; a guiding hole 421 suitable for the vertical penetration of the support vertical plate 3 is arranged on the connecting seat 4, and the connecting seat 4 is connected to the support frame 1. The worm gear screw lift 5 is arranged below the support vertical plate 3, and the worm gear screw lift 5 is in transmission connection with the support vertical plate 3.

[0061] It can be understood that the numbers of the support vertical plate 3, the connecting seat 4, and the worm gear screw lift 5 are all the same as the number of the front and rear clamping mechanisms 2. The worm gear screw lift 5 can be a worm gear screw lift 5 adjusted by a handwheel for lifting, or a worm gear screw lift 5 directly driven by a motor to adjust the lifting. In the present utility model, by arranging the support vertical plate 3 at the bottom of the front and rear clamping mechanism 2 and arranging the worm gear screw lift 5 below the support vertical plate 3 to support the support vertical plate 3, while the front and rear clamping mechanisms 2 are supported, the height of the front and rear clamping mechanisms 2 can also be adjusted. When welding and repairing the bottom of the vehicle body is required, by lifting the front and rear clamping mechanisms 2, the vehicle body can be lifted to a certain height after being clamped, so as to facilitate the workers to carry out welding and repair operations below the bottom of the vehicle body.

[0062] In addition, in the present utility model, a guiding hole 421 is arranged on the connecting seat 4. When the support vertical plate 3 vertically penetrates into the guiding hole 421, the connecting seat 4 can play a guiding and limiting role on the support vertical plate 3 and the front and rear clamping mechanisms 2 above it, thereby preventing the front and rear clamping mechanisms 2 from moving randomly, enabling the front and rear clamping mechanisms 2 to be in the correct use position. In this way, while the bottom of the vehicle body is successfully clamped, the welding and repair quality of the vehicle body can also be guaranteed.

[0063] As Figure 1 and Figure 5 shown, optionally, the worm gear screw lift 5 includes a circular base 51, a support cylinder 52, a lift body 53, a worm gear (not shown in the drawings), a screw rod 54, a worm 56, and a tray 55. Specifically, the circular base 51 is horizontally arranged on the ground, the support cylinder 52 is vertically fixed on the circular base 51, and the lift body 53 is fixedly arranged at the upper end of the support cylinder 52. Since the contact area between the circular base 51 and the ground is large, when the lift body 53 is arranged at the upper end of the support cylinder 52 on the circular base 51, the stability of the worm gear screw lift 5 can be improved, making the worm gear screw lift 5 not easily fall over, so as to ensure that the vehicle body can be stably clamped, and when the workers weld and repair the vehicle body, the vehicle body will not fall down, and the safety hazard is small.

[0064] Specifically, the worm wheel is rotatably arranged in the lift body 53, and the axial direction of the worm wheel is perpendicular to the ground; the screw rod 54 is vertically inserted into the center hole of the worm wheel, and the screw rod 54 is rotatably connected to the inner wall of the center hole of the worm wheel (the inner wall of the center hole is provided with an internal thread matching the screw rod 54), the lower end of the screw rod 54 is vertically movable in the support tube 52, and the upper end of the screw rod 54 is located above the lift body 53; the worm 56 is horizontally arranged, and the worm 56 is horizontally rotatably arranged in the lift body 53, and the worm 56 is meshed with the worm wheel for transmission. The tray 55 is fixedly connected to the upper end of the screw rod 54, and the tray 55 is used to support the vertical plate 3 and the front and rear clamping mechanism 2.

[0065] Through the meshing transmission of the worm 56 and the worm wheel, the horizontal rotation of the worm 56 can be converted into the vertical rotation of the worm wheel, so that when the worm wheel rotates, the screw 54 rotatably connected to the inner wall of the worm wheel center hole can move up and down, thereby driving the tray 55 and the supporting vertical plate 3 above the tray 55 and the front and rear clamping mechanisms 2 to rise and fall, thereby realizing the adjustment of the height of the front and rear clamping mechanisms 2, and when the bottom of the vehicle body needs to be welded and repaired, the vehicle body can be clamped and lifted to a certain height, so as to facilitate the workers to perform welding and repair operations under the bottom of the vehicle body.

[0066] like Figure 6 and Figure 7 As shown, optionally, the front and rear clamping mechanism 2 includes a supporting transverse plate 201, a first clamping plate 202, a second clamping plate 203, a cylinder 204, a first cushion block 205 and a second cushion block 206. Specifically, the supporting transverse plate 201 is horizontally fixed on the supporting vertical plate 3, and the supporting transverse plate 201 is parallel to the wide side direction of the supporting frame 1. The first clamping plate 202 and the second clamping plate 203 can be specifically used to clamp the skirt of the bottom of the vehicle body, wherein the first clamping plate 202 is vertically arranged on the supporting transverse plate 201, and the length direction of the first clamping plate 202 is parallel to the length direction of the supporting frame 1, and the second clamping plate 203 is vertically arranged on the side of the first clamping plate 202 away from the supporting frame 1. The cylinder 204 is fixed on the supporting cross plate 201, and the telescopic rod of the cylinder 204 (the telescopic rod of the cylinder 204 is parallel to the length direction of the supporting cross plate 201) is fixedly connected to the side of the second clamping plate 203 away from the first clamping plate 202, so that the second clamping plate 203 can be driven to move by the action of the telescopic rod of the cylinder 204, so that the second clamping plate 203 and the first clamping plate 202 can cooperate to clamp the skirt of the bottom of the vehicle body.

[0067] like Figure 6 and Figure 7As shown in the figure, specifically, the first cushion block 205 is fixedly arranged on one side of the first clamping plate 202 facing the second clamping plate 203, and the first cushion block 205 is located at the upper part of the first clamping plate 202. The second cushion block 206 is arranged opposite to the first cushion block 205, and the second cushion block 206 is fixedly arranged on one side of the second clamping plate 203 facing the first clamping plate 202. Anti-slip bumps or anti-slip ribs (not shown in the attached drawings) that can increase the friction force are arranged on the surfaces of the above-mentioned first cushion block 205 and second cushion block 206. When clamping the skirt on the bottom of the vehicle body, the first cushion block 205 and the second cushion block 206 are in contact with the skirt. Therefore, there is a large friction force between the first cushion block 205 and the second cushion block 206 and the skirt, so that the skirt on the bottom of the vehicle body can be stably clamped. When welding and repairing the vehicle body, the vehicle body will not move, so the quality of welding and repairing the vehicle body can be ensured.

[0068] It should be noted that when the skirt on the bottom of the vehicle body is clamped by the front and rear clamping mechanism 2, the vehicle body can be stably supported by the tops of the first clamping plate 202 and the second clamping plate 203, thereby further ensuring the quality of welding and repairing the vehicle body.

[0069] As Figure 6 shown, optionally, the front and rear clamping mechanism 2 further includes a guide rod 207 vertically connected to the first clamping plate 202; the guide rod 207 is parallel to the telescopic rod of the cylinder 204, and the guide rod 207 passes through the second clamping plate 203. At least two guide rods 207 can be arranged, and the guide rods 207 are located on both sides of the telescopic rod of the cylinder 204. In this way, during the movement of the second clamping plate 203, the guide rods 207 can guide the movement of the second clamping plate 203, so that the second clamping plate 203 moves along a predetermined straight line direction and always corresponds to the first clamping plate 202. In this way, when the first clamping plate 202 and the second clamping plate 203 clamp the bottom of the vehicle body, both sides of the bottom of the vehicle body (such as the bottom skirt) can be evenly stressed, so that the shape and dimensional accuracy of the clamped part of the vehicle body can be better maintained.

[0070] As Figure 6 and Figure 7As shown, optionally, an installation plate 208 is fixedly provided at the bottom of the first clamping plate 202 and is placed on the support cross plate 201. The installation plate 208 is perpendicular to the first clamping plate 202, and connecting rods 210 are fixedly provided perpendicularly on both sides of the installation plate 208. A U-shaped connecting piece 209 is provided at the bottom of the support cross plate 201. The U-shaped connecting piece 209 is slidably connected to the bottom of the support cross plate 201 along the length direction of the support cross plate 201, and the two connecting rods 210 are respectively detachably connected to both ends of the U-shaped connecting piece 209. Thus, the installation plate 208 and the first clamping plate 202 thereon can be kept connected through the connecting rods 210 and the U-shaped connecting piece 209. And because the U-shaped connecting piece 209 can slide along the length direction of the support cross plate 201, the fixed position of the first clamping plate 202 can be adjusted along the length direction of the support cross plate 201, so as to enable the front and rear clamping mechanism 2 to meet the requirement of clamping vehicle bodies of different widths.

[0071] And in order to fix the U-shaped connecting piece 209 so that the first clamping plate 202 will not move after the fixed position is adjusted, in the above optional embodiment, a locking screw rod 212 that is inserted into the bottom of the U-shaped connecting piece 209 and abuts against the bottom of the support cross plate 201 can be provided.

[0072] It should be noted that after the fixed position of the first clamping plate 202 is adjusted, the telescopic stroke of the telescopic rod of the air cylinder 204 also needs to be adjusted correspondingly, so as to ensure that the bottom of the vehicle body can always be clamped by the first clamping plate 202 and the second clamping plate 203.

[0073] In order to enable the U-shaped connecting piece 209 to slide along the bottom of the support cross plate 201, a guide groove 2011 is provided at the bottom of the support cross plate 201, and a sliding part 211 that is slidably matched with the guide groove 2011 is provided on the U-shaped connecting piece 209.

[0074] As Figures 1 to 3 shown, optionally, a first scale 6 is provided at the top of the support cross plate 201. The first scale 6 is arranged along the length direction of the support cross plate 201, so that the position of the first clamping plate 202 can be accurately adjusted with the help of the first scale 6, enabling the front and rear clamping mechanism 2 to meet the requirement of clamping vehicle bodies of different widths.

[0075] A second scale 7 is provided on the supporting vertical plate 3, and the second scale 7 is arranged along the height direction of the supporting vertical plate 3. As described above, the supporting vertical plate 3 is vertically penetrated through the connecting seat 4. Therefore, the change of the scale numbers at the contact between the second scale 7 and the connecting seat 4 can be used to judge the height change during the height adjustment of the front and rear clamping mechanisms 2. Thus, with the help of the second scale 7, the height of the front and rear clamping mechanisms 2 can be accurately adjusted to keep the heights of multiple front and rear clamping mechanisms 2 consistent. When welding and repairing the vehicle body, the situation that the vehicle body is unevenly stressed and tilted due to the inconsistent heights of the front and rear clamping mechanisms 2 can be avoided, thereby ensuring the stability of the vehicle body during the welding and repairing process and improving the welding and repairing quality of the vehicle body.

[0076] As Figure 1 , Figure 2 , Figure 4 and Figure 8 shown, optionally, the connecting seat 4 includes a connecting plate 41, a guide cylinder 42 and a reinforcing plate 43. Specifically, the connecting plate 41 is connected to the support frame 1; the guide cylinder 42 is vertically arranged, and a guide hole 421 matching the supporting vertical plate 3 is formed on the guide cylinder 42; at least two reinforcing plates 43 are provided, and the reinforcing plates 43 are fixedly connected to both the connecting plate 41 and the guide cylinder 42 at the same time, thereby being able to improve the bearing capacity of the connecting seat 4.

[0077] As Figure 1 , Figure 2 , Figure 4 and Figure 8 shown, optionally, the connecting plate 41 is slidably connected to both the top and the bottom of the support frame 1 at the same time. Thus, the distance between the front and rear clamping mechanisms 2 on the same side of the support frame 1 can be adjusted by moving the connecting seat 4, so that the front and rear clamping mechanisms 2 can meet the requirements for clamping vehicle bodies of different lengths. In order to enable the connecting plate 41 to slide along the length direction of the support frame 1, guide rail parts 101 are formed on the outer sides of the top and the bottom of the support frame 1, and the guide rail parts 101 are parallel to the length direction of the support frame 1.

[0078] As Figure 1 , Figure 2 , Figure 4 and Figure 8 shown, optionally, the connecting plate 41 includes a vertical connecting plate 411 and two mirror-image inverted L-shaped connecting plates 412. The two inverted L-shaped connecting plates 412 are respectively arranged at the top and the bottom of the vertical connecting plate 411, and the inverted L-shaped connecting plates 412 are slidably arranged on the guide rail parts 101. The cooperation between the inverted L-shaped connecting plates 412 and the vertical connecting plate 411 enables the connecting plate 41 to only slide along the length direction of the support frame 1, ensuring the reliable connection between the front and rear clamping mechanisms 2 and the support frame 1.

[0079] As Figure 1As shown, optionally, a third scale 8 parallel to the guide rail portion 101 is provided at the top of the support frame 1. By means of the third scale 8, the distance between the front and rear clamping mechanisms 2 on the same side of the support frame 1 can be precisely adjusted, so that the front and rear clamping mechanisms 2 can better meet the requirements for clamping vehicle bodies of different lengths.

[0080] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An automotive body welding fixture, comprising a support frame rectangular in the horizontal direction; characterized in that, Also includes: Two groups of front and rear clamping assemblies, the two groups of front and rear clamping assemblies are respectively arranged above the two sides in the length direction of the support frame, and each group of the front and rear clamping assemblies includes at least two front and rear clamping mechanisms; A support vertical plate, wherein the support vertical plate is vertically fixed to the bottom of the front and rear clamping mechanisms; A connecting seat, wherein the connecting seat is provided with a guide hole suitable for supporting the vertical plate to vertically pass through, and the connecting seat is connected to the supporting frame; A worm gear screw lift is arranged below the supporting vertical plate, and the worm gear screw lift is transmission-connected to the supporting vertical plate.

2. The automotive body welding fixture according to claim 1, wherein The worm gear screw lift comprises: A circular base, wherein the circular base is horizontally arranged on the ground; A support tube, wherein the support tube is vertically fixed on a circular base. An elevator body, wherein the elevator body is fixedly mounted on the upper end of the support tube; A worm wheel, the worm wheel is rotatably arranged in the elevator body, and the axial direction of the worm wheel is perpendicular to the ground; A screw rod, the screw rod is vertically inserted into the center hole of the worm wheel, and the screw rod is rotatably connected to the inner wall of the center hole of the worm wheel, the lower end of the screw rod is vertically movable in the support tube, and the upper end of the screw rod is located above the elevator body; A worm, the worm is arranged horizontally and is arranged in the elevator body for horizontal rotation, and the worm is meshed with the worm wheel for transmission; A tray is fixedly connected to the upper end of the screw rod.

3. The automotive body welding fixture according to claim 1, wherein The front and rear clamping mechanisms include: A supporting transverse plate, wherein the supporting transverse plate is horizontally fixed on the supporting vertical plate, and the supporting transverse plate is parallel to the wide side direction of the supporting frame; A first clamping plate, wherein the first clamping plate is vertically arranged on the supporting horizontal plate, and a length direction of the first clamping plate is parallel to a length direction of the supporting frame; A second clamping plate, the second clamping plate is vertically arranged on a side of the first clamping plate away from the supporting frame; A cylinder, wherein the cylinder is fixedly mounted on the supporting horizontal plate, and a telescopic rod of the cylinder is fixedly connected to a side of the second clamping plate facing away from the first clamping plate; A first cushion block, the first cushion block is fixedly arranged on a side of the first clamping plate facing the second clamping plate, and the first cushion block is located on an upper portion of the first clamping plate; The second cushion block is arranged opposite to the first cushion block, and the second cushion block is fixedly arranged on a side of the second clamping plate facing the first clamping plate.

4. The automotive body welding fixture according to claim 3, characterized in that, The front and rear clamping mechanism also includes a guide rod vertically connected to the first clamping plate; the guide rod is parallel to the telescopic rod of the cylinder, and the guide rod is penetrated on the second clamping plate.

5. The automotive body welding fixture according to claim 3, wherein A mounting plate is fixedly provided at the bottom of the first clamping plate; a U-shaped connecting piece is provided at the bottom of the supporting cross plate; the U-shaped connecting piece is slidably connected to the bottom of the supporting cross plate along the length direction of the supporting cross plate; the mounting plate is perpendicular to the first clamping plate, and connecting rods are vertically fixedly provided on both sides of the mounting plate; the two connecting rods are detachably connected to the two ends of the U-shaped connecting piece respectively; a locking screw abutting against the bottom of the supporting cross plate is inserted at the bottom of the U-shaped connection.

6. The automotive body welding fixture according to claim 5, characterized in that, A first scale is provided on the top of the supporting horizontal plate, and the first scale is arranged along the length direction of the supporting horizontal plate; a second scale is provided on the supporting vertical plate, and the second scale is arranged along the height direction of the supporting vertical plate.

7. The automotive body welding fixture according to claim 1, characterized in that, The connecting seat comprises: A connecting plate connected to the supporting frame; A guide cylinder, which is arranged vertically and has a guide hole that matches the supporting vertical plate; Reinforcing plate, the reinforcing plate is fixedly connected to both the connecting plate and the guiding cylinder at the same time.

8. The automotive body welding fixture according to claim 7, characterized in that, The connecting plate is slidably connected to both the top and the bottom of the support frame at the same time. Guide rail parts are formed on the outer sides of both the top and the bottom of the support frame, and the guide rail parts are parallel to the length direction of the support frame.

9. The automotive body welding fixture according to claim 8, characterized in that, The connecting plate includes a vertical connecting plate and two inverted L-shaped connecting plates arranged in a mirror image of each other; the two inverted L-shaped connecting plates are respectively arranged at the top and the bottom of the vertical connecting plate, and the inverted L-shaped connecting plates are slidably arranged on the guide rail parts.

10. The automotive body welding fixture according to claim 8, characterized in that, A third scale parallel to the guide rail part is provided at the top of the support frame.

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