A rear frame assembly welding tool

Abstract

The present invention relates to the technical field of welding tooling, and specifically discloses a rear frame assembly welding tooling, including a supporting mechanism, a positioning mechanism and a driving mechanism. When welding, the vertical plate is placed on the supporting base plate, and the vertical plate is fixedly positioned by the first positioning assembly. When welding the guide rail, the third positioning assembly and the fourth positioning assembly are moved to the side of the supporting base plate away from the vertical plate. At this time, the third positioning assembly and the fourth positioning assembly will not interfere with the welding of the guide rail and the vertical plate. After the guide rail is welded, the wheel frame fixing plate is clamped to a predetermined position, and the third positioning assembly is moved to position the wheel frame fixing plate. After positioning, the wheel frame fixing plate is welded, and then the enclosure is clamped to a preset position, and the fourth positioning assembly is moved to directly above the enclosure and positioned. This allows for multi-component welding of the rear frame assembly to be achieved on the same welding tooling, thereby ensuring positioning accuracy and saving costs.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, in particular to a rear frame assembly welding tooling. Background Art

[0002] The rear frame assembly is an important part of the forklift. The rear frame assembly generally includes four parts: the vertical plate, the guide rail, the wheel frame fixing plate and the enclosure. During the production process of the rear frame assembly, multiple components are generally positioned through multiple tooling. Generally, at least three welding toolings are required. The first is to weld the guide rail to the vertical plate, the second is to weld the wheel frame fixing plate to the vertical plate, and the third is to weld the enclosure to the vertical plate. However, there is a big problem. The parts need to be moved repeatedly, which easily leads to positioning errors. In addition, the welding of a component requires multiple tooling equipment, which greatly increases the cost. Summary of the Invention

[0003] The present invention is made in consideration of the above-mentioned problems. The purpose of the invention is to provide a rear frame assembly welding tool, which can complete the welding of multiple components on one welding tool, ensure positioning accuracy, save costs, and ensure complete welding.

[0004] To achieve the above-mentioned object, the present invention provides a welding tool for a rear frame assembly, wherein the rear frame assembly includes a vertical plate, a guide rail, a wheel frame fixing plate and a surrounding plate, the welding tool is used to weld the guide rail, the wheel frame fixing plate and the surrounding plate to the vertical plate, the welding tool includes a support mechanism and a positioning mechanism provided on the support mechanism, the support mechanism includes a reversible support base plate, the positioning mechanism includes a first positioning assembly for fixing the vertical plate, a second positioning assembly for fixing the two guide rails on opposite sides of the vertical plate, a third positioning assembly for fixing the wheel frame fixing plate at the rear end of the vertical plate, and a fourth positioning assembly for fixing the surrounding plate above the wheel frame fixing plate, wherein the third positioning assembly and the fourth positioning assembly are movably provided on the support base plate;

[0005] When the welding tool is used to weld the guide rail, the third positioning assembly and the fourth positioning assembly can both be moved to the side of the support base plate away from the vertical plate; when the welding tool is used to weld the wheel frame fixing plate, the fourth positioning assembly can be moved to the side of the support base plate away from the vertical plate.

[0006] According to the above-mentioned rear frame assembly welding tool, the support mechanism further includes an active positioner and a driven positioner, and the active positioner and the driven positioner are respectively located on two symmetrical sides of the support base plate;

[0007] The active positioner includes a main support frame, an active turntable rotatably arranged on the main support frame, and an active motor for driving the active turntable to rotate. The driven positioner includes a secondary support frame and a driven turntable rotatably arranged on the secondary support frame. Both sides of the support base are respectively connected to the active turntable and the driven turntable.

[0008] According to the above-mentioned rear frame assembly welding tool, through holes are provided on both sides of the middle part of the vertical plate; the first positioning assembly includes a first positioning cylinder, a first clamping cylinder and a second clamping cylinder fixed on the supporting base plate, and a pressure plate is provided on the telescopic axis of the first positioning cylinder, and the pressure plate is in contact with the front end surface of the vertical plate. At least two of the first clamping cylinders are symmetrically distributed at the front end of the vertical plate, and the telescopic axis of the first clamping cylinder can abut against the top of the front end of the vertical plate. The two second clamping cylinders are arranged on both sides of the middle part of the vertical plate through the two through holes, and the telescopic axis of the second clamping cylinder can abut against the top surface of the middle part of the vertical plate.

[0009] According to the above-mentioned rear frame assembly welding tooling, an adjustment plate is provided on the front end of the vertical plate, and the first positioning assembly also includes two adjustment screws, the two adjustment screws are symmetrically distributed on the supporting base plate at the front end of the vertical plate, and one end of the adjustment screw is threadedly connected to the adjustment plate.

[0010] According to the above-mentioned rear frame assembly welding fixture, the second positioning assembly includes a third clamping cylinder and a clamping seat, the third clamping cylinder is fixed to the support base and is located on one side of the guide rail, and a first clamping plate is provided on the telescopic shaft of the third clamping cylinder, and the first clamping plate can abut against the top of the guide rail;

[0011] The clamping seat includes a clamping seat main body abutting against the outer side of the guide rail and a second clamping plate abutting against the inner side of the guide rail, and the second clamping plate is rotatably arranged on the clamping seat main body.

[0012] According to the above-mentioned rear frame assembly welding tool, it also includes a driving mechanism, which includes a first driving assembly for driving the third positioning assembly to move and a second driving assembly for driving the fourth positioning assembly to move.

[0013] According to the above-mentioned rear frame assembly welding tooling, the first driving assembly includes two guide shafts symmetrically arranged on the supporting base plate, a first slider slidably arranged on the guide shafts, a first connecting plate connected to the bottom of the third positioning assembly, and a first driving cylinder fixed to the bottom of the supporting base plate. The guide shafts are arranged on the supporting base plate along the front and rear directions of the vertical plate, and the telescopic shaft of the first driving cylinder is connected to the first connecting plate.

[0014] According to the above-mentioned rear frame assembly welding tool, the wheel frame fixing plate includes a driving wheel fixing plate and two driven wheel fixing plates arranged on both sides of the driving wheel fixing plate, the driving wheel fixing plate is provided with a first mounting hole, and the two driven wheel fixing plates are both provided with a second mounting hole;

[0015] The third positioning assembly includes a first fixing seat fixedly connected to the first slider, first positioning protrusions distributed on both sides of the first fixing seat, a first mounting seat connected to the first fixing seat, and a fourth clamping cylinder arranged on the first mounting seat. When the third positioning assembly moves toward the side close to the wheel frame fixing plate, the first positioning protrusion can be stuck in the second mounting hole, and the third clamping plate on the fourth clamping cylinder can pass through the first mounting hole and abut against the front end surface of the driving wheel fixing plate.

[0016] According to the above-mentioned rear frame assembly welding tooling, the second driving assembly includes two slide rails symmetrically arranged on the support base plate, a second slider slidably arranged on the slide rails, a second connecting plate for connecting with the fourth positioning assembly, and a second driving cylinder fixed to the bottom of the support base plate. The slide rails are arranged on the support base plate along the front and rear directions of the vertical plate, and the second driving cylinder is connected to the second connecting plate.

[0017] According to the above-mentioned rear frame assembly welding tooling, the fourth positioning assembly includes a correction plate located above the enclosure and an extrusion shaft located on both sides of the enclosure. Both ends of the correction plate are connected to the slider through a support seat, and a correction bolt for squeezing the top of the enclosure is provided on the correction plate, and the extrusion shaft can abut against one side of the enclosure.

[0018] The present invention has the following beneficial effects: when using the welding tool for welding, the vertical plate is placed on the supporting base plate by a robot, the position of the supporting vertical plate is adjusted by the first positioning assembly, and the vertical plate is fixed and positioned. When welding the guide rail, the third positioning assembly and the fourth positioning assembly are moved to the side of the supporting base plate away from the vertical plate. At this time, the third positioning assembly and the fourth positioning assembly will not interfere with the welding of the guide rail and the vertical plate. After the guide rail is welded, the welding wheel frame fixing plate can be clamped to a predetermined position by the robot, and then the third positioning assembly is moved to position the wheel frame fixing plate. After positioning, the wheel frame fixing plate is welded. After completion, the enclosure is clamped to a preset position by the robot, and the fourth positioning assembly is moved to just above the enclosure and positioned. It is possible to achieve multi-component welding of the rear frame assembly on the same welding tool, which can ensure positioning accuracy and save costs. In addition, the supporting base plate can be flipped during the welding process, which can make the welding more comprehensive and the welding strength high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2. It is a schematic diagram of the overall structure of the rear frame assembly and the welding fixture assembly of the embodiment;

[0020] Figure 2 is an assembly diagram of the positioning mechanism and the supporting base plate of the embodiment;

[0021] Figure 3 1 is a schematic diagram of the assembly of the driving mechanism and the positioning mechanism of the embodiment;

[0022] Figure 4 2 is a schematic structural diagram of a rear frame assembly according to an embodiment.

[0023] In the picture:

[0024] 1. Rear frame assembly; 11. Vertical plate; 111. Adjustment plate; 12. Guide rail; 13. Wheel frame fixing plate; 131. Drive wheel fixing plate; 131a. First mounting hole; 132. Driven wheel fixing plate; 132a. Second mounting hole; 14. Enclosure;

[0025] 2. Support mechanism; 21. Support base; 22. Active positioner; 221. Main support frame; 222. Active turntable; 223. Active motor; 23. Driven positioner; 231. Auxiliary support frame; 232. Driven turntable;

[0026] 3. Positioning mechanism; 31. First positioning assembly; 311. First positioning cylinder; 311a. Pressing plate; 312. First clamping cylinder; 313. Second clamping cylinder; 314. Adjusting bolt; 32. Second positioning assembly; 321. Third clamping cylinder; 321a. First clamping plate; 322. Clamping seat; 322a. Clamping seat body; 322b. Second clamping plate; 33. Third positioning assembly; 331. First fixing seat; 332. First protrusion; 333. First mounting seat; 334. Fourth clamping cylinder; 334a. Third clamping plate; 34. Fourth positioning assembly; 341. Correction plate; 341a. Correction bolt; 342. Extrusion shaft;

[0027] 4. Driving mechanism; 41. First driving assembly; 411. Guide shaft; 412. First slider; 413. First connecting plate; 42. Second driving assembly; 421. Slide rail; 422. Second slider; 423. Second connecting plate; 424. Second driving cylinder. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0029] like Figure 1-4As shown, a rear frame assembly welding tool includes a support mechanism 2 for providing support, a positioning mechanism 3 arranged on the support mechanism 2, and a driving mechanism 4. The driving mechanism 4 can drive the third positioning component 33 and the fourth positioning component 34 in the positioning mechanism 3. When welding the guide rail 12 and the vertical plate 11, the third positioning component 33 and the fourth positioning component 34 can be moved away to prevent the third positioning component 33 and the fourth positioning component 34 from interfering with the welding device. When welding the wheel frame fixing plate 13, the fourth positioning component 34 can be moved away to prevent the fourth positioning component 34 from interfering with the welding device, thereby achieving an avoidance effect, thereby achieving the welding of multiple components of the rear frame assembly 1 on the same welding tool.

[0030] Specifically, the rear frame assembly 1 includes a vertical plate 11, a guide rail 12, a wheel frame fixing plate 13 and a surrounding plate 14. The welding tooling of this embodiment is used to weld the guide rail 12, the wheel frame fixing plate 13 and the surrounding plate 14 to the vertical plate 11. The first step is to weld the two guide rails 12 to both sides of the vertical plate 11, the second step is to weld the wheel frame fixing plate 13 to the rear end of the vertical plate 11, and the third step is to weld the surrounding plate 14 to the rear end of the vertical plate 11.

[0031] Specifically, the supporting mechanism 2 includes a flip supporting base plate 21, a main positioner and a slave positioner. The active positioner 22 and the driven positioner 23 are respectively located on two symmetrical sides of the supporting base plate 21. The active positioner 22 includes a main supporting frame 221, an active turntable 222 rotatably arranged on the main supporting frame 221, and an active motor 223 for driving the active turntable 222 to rotate. The driven positioner 23 includes a sub-support frame 231 and a driven turntable 232 rotatably arranged on the sub-support frame 231. The two sides of the supporting base plate 21 are respectively connected to the active turntable 222 and the driven turntable 232. When the welding angle needs to be adjusted, the active motor 223 drives the active turntable 222 to rotate, thereby driving the supporting base plate 21 to rotate, and the driven turntable 232 also rotates together.

[0032] Furthermore, the positioning mechanism 3 includes a first positioning component 31 for fixing the vertical plate 11, a second positioning component 32 for fixing the two guide rails 12 on opposite sides of the vertical plate 11, a third positioning component 33 for fixing the wheel frame fixing plate 13 at the tail end of the vertical plate 11, and a fourth positioning component 34 for fixing the enclosure 14 to the top of the wheel frame fixing plate 13, wherein the third positioning component 33 and the fourth positioning component 34 are movably arranged on the support base plate 21, and when the welding tool is used to weld the guide rail 12, the third positioning component 33 and the fourth positioning component 34 can be moved to the side of the support base plate 21 away from the vertical plate 11, and when the welding tool is used to weld the wheel frame fixing plate 1 3, the fourth positioning component 34 can be moved to the side of the supporting base plate 21 away from the vertical plate 11, that is, when welding the guide rail 12, the first positioning component 31 and the second positioning component 32 are used to fix the positions of the vertical plate 11 and the guide rail 12. At this time, the third positioning component 33 and the fourth positioning component 34 are moved away to prevent the third positioning component 33 and the fourth positioning component 34 from interfering with the welding device, thereby achieving an avoidance effect. Similarly, when welding the wheel frame fixing plate 13, the first positioning component 31 is used to fix the vertical plate 11, the second positioning component 32 is used to fix the guide rail 12, the third positioning component 33 is used to fix the wheel frame fixing plate 13 column, and the fourth positioning component 34 is avoided.

[0033] Furthermore, through holes are provided on both sides of the middle of the vertical plate 11. The first positioning assembly 31 includes a first positioning cylinder 311, a first clamping cylinder 312 and a second clamping cylinder 313 fixed on the supporting base plate 21. A pressing plate 311a is provided on the telescopic shaft of the first positioning cylinder 311. The pressing plate 311a is in contact with the front end surface of the vertical plate 11. At least two first clamping cylinders 312 are symmetrically distributed at the front end of the vertical plate 11, and the telescopic shaft of the first clamping cylinder 312 can be aligned with the front end surface of the vertical plate 11. The top of the front end of the vertical plate 11 is abutted, and two second clamping cylinders 313 are set on both sides of the middle part of the vertical plate 11 through two through holes, and the telescopic axis of the second clamping cylinder 313 can abut against the top surface of the middle part of the vertical plate 11. When the manipulator places the vertical plate 11 on the supporting base plate 21, the position is first adjusted by the first positioning cylinder 311, and then the first clamping cylinder 312 and the second clamping cylinder 313 are used to fix the vertical plate 11 to complete the installation and positioning of the vertical plate 11.

[0034] Furthermore, an adjustment plate 111 is provided on the front end of the vertical plate 11, and the first positioning assembly 31 also includes two adjusting screws, which are symmetrically distributed on the supporting base plate 21 at the front end of the vertical plate 11, and one end of the adjusting screw is threadedly connected to the adjusting plate 111. After the vertical plate 11 is adjusted by the first positioning cylinder 311, fine-tuning can be performed using the two adjusting screws to ensure the positioning accuracy of the vertical plate 11, thereby ensuring the welding accuracy.

[0035] Furthermore, the second positioning assembly 32 includes a third clamping cylinder 321 and a clamping seat 322. The third clamping cylinder 321 is fixed on the supporting base 21 and is located on one side of the guide rail 12. A first clamping plate 321a is provided on the telescopic axis of the third clamping cylinder 321, and the first clamping plate 321a can abut against the top of the guide rail 12. The clamping seat 322 includes a clamping seat body 322a abutting against the outer side of the guide rail 12 and a second clamping plate 322b abutting against the inner side of the guide rail 12. The second clamping plate 322b is rotatably set on the clamping seat body 322a. Before welding the guide rail 12, the guide rail 12 is clamped to both sides of the vertical plate 11 by a robot. The third clamping cylinder 321 drives its telescopic axis to rotate, and the first clamping plate 321a is used to realize the vertical positioning of the guide rail 12, and the second clamping plate 322b on the clamping seat 322 is used to realize the horizontal positioning of the guide rail 12, thereby completing the positioning of the guide rail 12.

[0036] In order to realize the movement of the third positioning assembly 33 and the fourth positioning assembly 34 , in this embodiment, the driving mechanism 4 includes a first driving assembly 41 for driving the third positioning assembly 33 to move and a second driving assembly 42 for driving the fourth positioning assembly 34 to move.

[0037] Specifically, the first driving assembly 41 includes two guide shafts 411 symmetrically arranged on the supporting base plate 21, a first slider 412 slidably arranged on the guide shaft 411, a first connecting plate 413 connected to the bottom of the third positioning assembly 33, and a first driving cylinder fixed to the bottom of the supporting base plate 21. The guide shaft 411 is arranged on the supporting base plate 21 along the front and rear direction of the vertical plate 11, the telescopic shaft of the first driving cylinder is connected to the first connecting plate 413, and the first driving cylinder is arranged on the supporting base plate 21 along the front and rear direction of the vertical plate 11. The first driving cylinder drives the third positioning assembly 33 to move along the arrangement direction of the guide shaft 411 through the first connecting plate 413.

[0038] Specifically, the wheel frame fixing plate 13 includes a driving wheel fixing plate 131 and two driven wheel fixing plates 132 arranged on both sides of the driving wheel fixing plate 131. The driving wheel fixing plate 131 is provided with a first mounting hole 131a, and the two driven wheel fixing plates 132 are provided with a second mounting hole 132a. The third positioning assembly 33 includes a first fixing seat 331 fixed to the first slider 412, first positioning protrusions distributed on both sides of the first fixing seat 331, a first mounting seat 333 connected to the first fixing seat 331, and a fourth clamping cylinder 334 arranged on the first mounting seat 333. When the third positioning assembly 33 is moved toward the first slider 412, the first positioning protrusions 331 are provided on both sides of the first fixing seat 331. When the side of the wheel frame fixing plate 13 moves, the first positioning protrusion can be stuck in the second mounting hole 132a, and the third clamping plate 334a on the fourth clamping cylinder 334 can pass through the first mounting hole 131a and abut against the front end surface of the driving wheel fixing plate 131. The two driven wheel fixing plates 132 are positioned by the first positioning protrusion, and the driving wheel fixing plate 131 is positioned by the third clamping plate 334a on the fourth clamping cylinder 334, so as to realize the clamping positioning of the entire wheel frame fixing plate 13. At the same time, since the first fixing seat 331 is connected to the first slider 412, the entire third positioning assembly 33 can be driven to move, which is convenient for adjusting the position.

[0039] Specifically, the second driving assembly 42 includes two sliding rails 421 symmetrically arranged on the supporting base plate 21, a second slider 422 slidably arranged on the sliding rails 421, a second connecting plate 423 for connecting with the fourth positioning assembly 34, and a second driving cylinder fixed to the bottom of the supporting base plate 21. The sliding rails 421 are arranged on the supporting base plate 21 along the front and rear directions of the vertical plate 11, the second driving cylinder is connected to the second connecting plate 423, and the two second driving cylinders respectively drive the two ends of the fourth positioning assembly 34 to move along the arrangement direction of the sliding rails 421 through the two second connecting plates 423.

[0040] Furthermore, the enclosure 14 is located above the wheel frame fixing plate 13. When fixing the enclosure 14, it needs to be fixed from above and on both sides. Therefore, the fourth positioning assembly 34 includes a correction plate 341 located above the enclosure 14 and an extrusion shaft 342 located on both sides of the enclosure 14. Both ends of the correction plate 341 are connected to the slider through a support seat, and a correction bolt 341a for squeezing the top of the enclosure 14 is provided on the correction plate 341. The extrusion shaft 342 can abut against one side of the enclosure 14. When the correction plate 341 moves to the top of the enclosure 14 through the support seat, the correction bolt 341a can be manually tightened to correct the top position of the enclosure 14, and the enclosure 14 is clamped and fixed by the two extrusion shafts 342.

[0041] The technical solutions of the present invention have been described in detail above with reference to the accompanying drawings, and the embodiments described are intended to facilitate understanding of the concepts of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A rear frame assembly welding tool, the rear frame assembly comprising a vertical plate, a guide rail, a wheel frame fixing plate and a surrounding plate, the welding tool being used to weld the guide rail, the wheel frame fixing plate and the surrounding plate to the vertical plate, characterized in that: The welding fixture includes a support mechanism and a positioning mechanism provided on the support mechanism, the support mechanism includes a reversible support base plate, the positioning mechanism includes a first positioning assembly for fixing the vertical plate, a second positioning assembly for fixing the two guide rails on opposite sides of the vertical plate, a third positioning assembly for fixing the wheel frame fixing plate to the rear end of the vertical plate, and a fourth positioning assembly for fixing the enclosure plate above the wheel frame fixing plate, wherein the third positioning assembly and the fourth positioning assembly are movably provided on the support base plate; When the welding tool is used to weld the guide rail, the third positioning assembly and the fourth positioning assembly can both be moved to a side of the support base plate away from the vertical plate; when the welding tool is used to weld the wheel frame fixing plate, the fourth positioning assembly can be moved to a side of the support base plate away from the vertical plate; The support mechanism further comprises an active positioner and a driven positioner, wherein the active positioner and the driven positioner are respectively located on two symmetrical sides of the support base plate; The active positioner includes a main support frame, an active turntable rotatably arranged on the main support frame, and an active motor for driving the active turntable to rotate; the driven positioner includes a secondary support frame and a driven turntable rotatably arranged on the secondary support frame; both sides of the support base are connected to the active turntable and the driven turntable respectively; Through holes are provided on both sides of the middle portion of the vertical plate; the first positioning assembly includes a first positioning cylinder, a first clamping cylinder and a second clamping cylinder fixed to the supporting base plate, a pressure plate is provided on the telescopic shaft of the first positioning cylinder, and the pressure plate is in contact with the front end surface of the vertical plate, at least two of the first clamping cylinders are symmetrically distributed at the front end of the vertical plate, and the telescopic shaft of the first clamping cylinder can abut against the top of the front end of the vertical plate, and the two second clamping cylinders are arranged on both sides of the middle portion of the vertical plate through the two through holes, and the telescopic shaft of the second clamping cylinder can abut against the top surface of the middle portion of the vertical plate; The second positioning assembly includes a third clamping cylinder and a clamping seat. The third clamping cylinder is fixed to the supporting base and is located on one side of the guide rail. A first clamping plate is provided on the telescopic shaft of the third clamping cylinder. The first clamping plate can abut against the top of the guide rail. The clamping seat includes a clamping seat main body abutting against the outer side of the guide rail and a second clamping plate abutting against the inner side of the guide rail, and the second clamping plate is rotatably arranged on the clamping seat main body.

2. The rear frame assembly welding tool according to claim 1, characterized in that: An adjustment plate is provided on the front end of the vertical plate, and the first positioning assembly also includes two adjustment screws, which are symmetrically distributed on the supporting base plate at the front end of the vertical plate, and one end of the adjustment screw is threadedly connected to the adjustment plate.

3. The rear frame assembly welding tool according to claim 1, characterized in that: The system further includes a driving mechanism comprising a first driving assembly for driving the third positioning assembly to move and a second driving assembly for driving the fourth positioning assembly to move.

4. The rear frame assembly welding tool according to claim 3, characterized in that: The first driving assembly includes two guide shafts symmetrically arranged on the supporting base, a first slider slidably arranged on the guide shafts, a first connecting plate connected to the bottom of the third positioning assembly, and a first driving cylinder fixed to the bottom of the supporting base. The guide shafts are arranged on the supporting base along the front and rear directions of the vertical plate, and the telescopic shaft of the first driving cylinder is connected to the first connecting plate.

5. The rear frame assembly welding tool according to claim 4, characterized in that: The wheel frame fixing plate includes a driving wheel fixing plate and two driven wheel fixing plates arranged on both sides of the driving wheel fixing plate, the driving wheel fixing plate is provided with a first mounting hole, and the two driven wheel fixing plates are both provided with a second mounting hole; The third positioning assembly includes a first fixing seat fixedly connected to the first slider, first positioning protrusions distributed on both sides of the first fixing seat, a first mounting seat connected to the first fixing seat, and a fourth clamping cylinder arranged on the first mounting seat. When the third positioning assembly moves toward the side close to the wheel frame fixing plate, the first positioning protrusion can be stuck in the second mounting hole, and the third clamping plate on the fourth clamping cylinder can pass through the first mounting hole and abut against the front end surface of the driving wheel fixing plate.

6. The rear frame assembly welding tool according to claim 3, characterized in that: The second driving assembly includes two sliding rails symmetrically arranged on the supporting base plate, a second slider slidably arranged on the sliding rails, a second connecting plate for connecting with the fourth positioning assembly, and a second driving cylinder fixed to the bottom of the supporting base plate. The sliding rails are arranged on the supporting base plate along the front and rear directions of the vertical plate, and the second driving cylinder is connected to the second connecting plate.

7. The rear frame assembly welding tool according to claim 6, characterized in that: The fourth positioning assembly includes a correction plate located above the enclosure and an extrusion shaft located on both sides of the enclosure. Both ends of the correction plate are connected to the slider through a support seat, and a correction bolt for squeezing the top of the enclosure is provided on the correction plate. The extrusion shaft can abut against one side of the enclosure.

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