A tool for trailer welding

Abstract

The present invention relates to a tool for trailer welding. It includes a base, on which a plurality of groups of buckle units are arranged, each group of buckle units includes a first saddle-shaped buckle and a second saddle-shaped buckle respectively connected to the corresponding first limit seat and the second limit seat, and the extension lines of the center lines of the first saddle-shaped buckle and the second saddle-shaped buckle intersect and are perpendicular in the horizontal plane; it also includes a plurality of groups of rotary lock assemblies arranged on the base, each group of rotary lock assemblies is respectively engaged with the corresponding buckle units; it also includes a push positioning assembly and a right-angle limiter connected at one end of the base; it also includes a bracket positioning assembly connected to the base; it also includes a frame positioning assembly for positioning the frame body. The present invention has multiple points of positioning for the placement of the workpiece, which will not cause the problems of welding position offset and poor welding accuracy, improve the welding qualification rate, improve production efficiency, and ensure that the scheduled work is completed within the construction period.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a tool for trailer welding. Background Art

[0002] In the transportation industry, trailers are often used to transport a variety of items. In actual work, the trailer frame is required to be relatively flat when transporting items. If it is not flat, it will affect the subsequent transportation process. The product will slip and tip over, greatly affecting the transportation efficiency and safety.

[0003] There is a kind of as in the specification Figure 8 The frame assembly shown in the figure comprises a frame body with a rectangular structure, and limit seat units are fixedly connected at the four corners of the frame body, and the four groups of limit seat units are symmetrically arranged in pairs, and each group of limit seat units comprises a first limit seat and a second limit seat; a front support body located between two adjacent groups of limit seat units is fixedly connected at one end of the frame body, and the front support body is formed by a sleeve, a flange, a bottom plate with a through hole in the middle, and a plurality of groups of ribs fixed to each other; two groups of axle brackets arranged in parallel are fixedly connected to the end of the frame body away from the front support body; the axle bracket is a door-shaped structure; the two groups of axle brackets are located between two adjacent groups of limit seat units; support block units are fixedly connected to the borders of the frame body in two length directions, and the support block units comprise two groups of first support blocks arranged in parallel fixedly connected to the outer side surface of the border of the frame body, and two groups of second support blocks arranged in parallel fixedly connected to the inner side surface.

[0004] However, due to the large size of the body frame and the high precision required, manual welding is generally used. However, the relatively strict process requirements make welding difficult. During welding, the welding position is generally placed manually by the staff, causing the welding position to shift and the welding accuracy to be unable to be guaranteed, resulting in long processing time, low pass rate, low production efficiency, and the inability to effectively guarantee the construction period. Summary of the invention

[0005] In order to solve the technical problems existing in the known technology, the present invention provides a trailer welding tool with simple structure, simple operation, accurate welding positioning, high welding precision and high production efficiency.

[0006] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is: a trailer welding tool includes a base, and a plurality of groups of snap units are arranged above the base, each group of snap units includes a first saddle-shaped snap and a second saddle-shaped snap respectively connected to the corresponding first limit seat and the second limit seat, and the extension lines of the center lines of the first saddle-shaped snap and the second saddle-shaped snap intersect and are perpendicular in the horizontal plane; it also includes a plurality of groups of rotary lock components arranged on the base for locking, connecting and releasing the frame frame and the base, and each group of rotary lock components is respectively engaged with the corresponding snap units; it also includes a pushing positioning component and a right-angle limiter connected at one end of the base for positioning the front support body; it also includes a bracket positioning component connected on the base for positioning the axle bracket; it also includes a frame positioning component for positioning the frame frame.

[0007] The advantages and positive effects of the present invention are as follows: the present invention provides a tooling for trailer welding, which preliminarily positions the frame body by setting a rotary lock component, and finally positions the frame body by using a frame positioning component, and locks and connects the frame body and the base by using the rotary lock component; positions the front support body on the central axis of the length direction of the frame body by setting two groups of right-angle limiters, and then pushes the front support body to move on the central axis of the length direction of the frame body to a preset position by using a push positioning component, thereby completing the final positioning of the front support body; clamps and positions the axle support by setting a support positioning component; the present invention has multi-point positioning for the placement of the workpiece, does not cause problems such as welding position offset and poor welding accuracy, improves the welding qualification rate, improves production efficiency, and ensures that the scheduled work is completed within the construction period.

[0008] Preferably: the rotary lock assembly includes a rotary lock mounting plate connected to the frame body, a rotary lock bottom box is fixedly connected to the top of the rotary lock mounting plate, and a rotary lock spring sheet is fixedly connected to the top of the rotary lock bottom box; a through hole is opened at the center of the rotary lock mounting plate, and a rotating shaft sleeve fixedly connected thereto is passed through the through hole, a rotary lock shaft rotatably connected to the rotating shaft sleeve is passed through the rotating shaft sleeve, a rotating block is connected to the lower end of the rotary lock shaft, and a rotary lock handle is connected to the upper end, and the rotary lock handle is snap-fitted with the buckle unit; a limit lock nut in contact with the rotary lock spring sheet is screwed on the rotary lock shaft; a rotary lock hole that is adapted to the outer contour of the rotating block and can be passed through by the rotating block is opened on the base.

[0009] Preferably, the rotary lock assembly further comprises a rotary shaft cap detachably connected to the top of the rotary lock rotary shaft, the rotary lock handle is L-shaped and the rotary lock handle is fixedly connected to the rotary shaft cap.

[0010] Preferably, two groups of inclined chamfers which are centrally symmetrically arranged are arranged on the top of the rotating block.

[0011] Preferably, a through hole extending in the radial direction is provided on the rotary lock shaft, a limit pin is passed through the through hole, and the limit pin is passed through a through groove provided on the limit lock nut.

[0012] Preferably: two groups of right-angle limit members are provided, and the two groups of right-angle limit members are respectively connected to their corresponding rotary lock shafts; the right-angle limit members include an installation sleeve which is sleeved on the rotary lock shaft and fixedly connected thereto, and a limiting horizontal plate portion is fixedly connected to the top of the installation sleeve, one end of the limiting horizontal plate portion is in contact with the front support body, and the other opposite end is fixedly connected to a limiting vertical plate portion in contact with the frame body; the two groups of right-angle limit members are symmetrically arranged.

[0013] Preferably: the pushing and positioning assembly includes two groups of push plate pillars arranged in parallel and fixedly connected to the base, and a group of laterally arranged push plates are rotatably connected to the top of each of the two groups of push plate pillars; the two groups of push plate pillars are arranged in parallel and are connected to their respective corresponding push plate pillars in the middle; a driving connecting plate is arranged at the end of the push plate away from the right-angle limiter, and the two ends of the driving connecting plate are respectively hinged to the two groups of push plates; it also includes a push cylinder which is arranged laterally and the cylinder barrel is hinged to the base, and the protruding end of the push cylinder is hinged to the driving connecting plate.

[0014] Preferably: the frame positioning assembly comprises a lever cylinder connected to the base, a positioning mounting plate is fixedly connected to the movable end of the lever cylinder, and two groups of first positioning blocks and two groups of second positioning blocks are fixedly connected to the bottom surface of the positioning mounting plate.

[0015] Preferably: the bracket positioning assembly includes two groups of parallelly arranged beam pillars fixedly connected to the base, a connecting beam is detachably connected to the top of the two groups of beam pillars, positioning pressing pieces are connected to both ends of the connecting beam, and grooves matching the top outer contour of the axle bracket are provided on the positioning pressing pieces; a group of splint connecting rods are rotatably connected to both ends of the connecting beam, the two groups of splint connecting rods are located below their respective corresponding positioning pressing pieces, and a group of positioning splints extending radially thereof are fixedly connected to the outer peripheral wall of each group of splint connecting rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the twist lock assembly in the present invention;

[0018] Figure 3 is a schematic cross-sectional structural diagram of the twist lock assembly in the present invention;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the right-angle limiter in the present invention;

[0020] Figure 5It is a schematic diagram of the three-dimensional structure of the push positioning assembly in the present invention;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the bracket positioning assembly in the present invention;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the frame positioning assembly in the present invention;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the frame assembly;

[0024] Fig. 9 It is a schematic diagram of the clamping of the frame assembly.

[0025] In the figure: 1, rotary lock assembly; 1-1, rotary block; 1-1-1, inclined chamfer; 1-2, rotary lock shaft; 1-3, shaft sleeve; 1-4, rotary lock mounting plate; 1-5, rotary lock bottom box; 1-6, rotary lock spring sheet; 1-7, limit lock nut; 1-8, limit pin; 1-9, shaft cover; 1-10, rotary lock handle; 2, first saddle buckle; 3, second saddle buckle; 4, right-angle limiter; 4-1, limit vertical plate; 4-2, mounting sleeve; 4-3, limit horizontal plate; 5, push positioning assembly; 5-1, push cylinder; 5-2, cylinder support; 5-3, cylinder hinge seat; 5-4, push Plate pillar; 5-5, push plate; 5-6, drive connecting plate; 6, frame positioning assembly; 6-1, first positioning block; 6-2, second positioning block; 6-3, positioning mounting plate; 6-4, lever cylinder; 7, bracket positioning assembly; 7-1, beam pillar; 7-2, positioning pressing piece; 7-3, clamping plate connecting rod; 7-4, positioning clamping plate; 7-5, connecting beam; 8, base; 8-1, rotary lock hole; 9, frame assembly; 9-1, frame frame; 9-2, first limit seat; 9-3, second limit seat; 9-4, front support body; 9-5, first support block; 9-6, second support block; 9-7, axle bracket. DETAILED DESCRIPTION

[0026] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0027] See also Figure 1 The trailer welding tooling of the present invention includes a base 8, and a plurality of groups of snap units are arranged above the base 8, each group of snap units includes a first saddle-shaped snap 2 and a second saddle-shaped snap 3 respectively connected to the corresponding first limit seat 9-2 and the second limit seat 9-3, and the extension lines of the center lines of the first saddle-shaped snap 2 and the second saddle-shaped snap 3 intersect and are perpendicular in the horizontal plane.

[0028] like Figure 1As shown, this embodiment also includes a plurality of sets of rotary lock assemblies 1 arranged on the base 8 for locking, connecting and releasing the frame body 9-1 and the base 8, and each set of rotary lock assemblies 1 is respectively engaged with the corresponding buckle units.

[0029] like Figure 2 and Figure 3 As shown, in this embodiment, the rotary lock assembly 1 includes a rotary lock mounting plate 1-4 connected to the frame body 9-1, a rotary lock bottom box 1-5 is fixedly connected to the top of the rotary lock mounting plate 1-4, and a rotary lock spring piece 1-6 is fixedly connected to the top of the rotary lock bottom box 1-5. A through hole is provided at the center of the rotary lock mounting plate 1-4, and a rotating shaft sleeve 1-3 fixedly connected thereto is passed through the through hole, a rotary lock shaft 1-2 rotatably connected to the rotating shaft sleeve 1-3 is passed through the rotating shaft sleeve 1-3, a rotating clamping block 1-1 is connected to the lower end of the rotary lock shaft 1-2, a rotary lock hole 8-1 which is adapted to the outer contour of the rotating clamping block 1-1 and can be passed through by the rotating clamping block 1-1 is provided on the base 8, the rotating clamping block 1-1 passes through the rotary lock hole 8-1, and two groups of inclined chamfers 1-1-1 which are centrally symmetrically arranged are provided on the top of the rotating clamping block 1-1, the inclined chamfers 1-1-1 cooperate with the base 8 so that the inclined chamfers 1-1-1 can rotate smoothly when in contact with the base 8.

[0030] A rotating shaft cap 1-9 is detachably connected to the top of the rotary lock shaft 1-2, and a rotary lock handle 1-10 is connected to the rotating shaft cap 1-9; in this embodiment, the rotary lock handle 1-10 is L-shaped and is engaged with the buckle unit, and when the frame body 9-1 and the base 8 are in a locked connection state, the rotary lock handle 1-10 is engaged with a group of saddle-shaped buckles; when the rotary lock handle 1-10 is rotated to engage with another group of saddle-shaped buckles, the frame body 9-1 and the base 8 are released from the locked connection state. A limit lock nut 1-7 in contact with the rotary lock spring sheet 1-6 is screwed on the rotary lock shaft 1-2, and a through hole extending in the radial direction is provided on the rotary lock shaft 1-2, and a limit pin 1-8 is inserted in the through hole, and the limit pin 1-8 is inserted in the through groove provided on the limit lock nut 1-7.

[0031] The working principle of the rotary lock assembly 1 is as follows: when the frame body 9-1 and the base 8 are in a locked connection state, the rotary lock handle 1-10 is engaged with a group of saddle-shaped buckles. At this time, the rotating block 1-1 is located below the rotary lock hole 8-1 and the length direction of the rotating block 1-1 is perpendicular to the length direction of the rotary lock hole 8-1. In addition, the rotary lock spring sheet 1-6 is pressed by the limiting lock nut 1-7 and is in a state of elastic deformation; when it is necessary to release the locking connection between the frame body 9-1 and the base 8, the rotary lock handle 1-10 needs to be manually pulled to rotate it toward the other group of saddle-shaped buckles. During this process, the rotary lock shaft 1-2 and the rotary lock block 1-1 rotate under the action of the rotary lock handle 1-10. By setting the inclined chamfer 1-1-1 and the rotary lock spring sheet 1-6, the rotary block 1-1 can rotate smoothly. When the rotating block 1-1 rotates until its length direction is consistent with the length direction of the rotary lock hole 8-1, the frame body 9-1 and the base 8 are released from the locked connection.

[0032] like Figure 1 As shown, a frame positioning assembly 6 for positioning the frame 9-1 is connected to the base 8. Figure 7 As shown, in this embodiment, the frame positioning assembly 6 includes a lever cylinder 6-4 connected to the base 8, a positioning mounting plate 6-3 is fixedly connected to the movable end of the lever cylinder 6-4, and two groups of first positioning blocks 6-1 and two groups of second positioning blocks 6-2 are fixedly connected to the bottom surface of the positioning mounting plate 6-3.

[0033] In the actual working process, the frame body 9-1 is first placed on the base 8, so that the multiple groups of rotating blocks 1-1 in the rotary lock assembly 1 correspond one by one to the multiple groups of rotary lock holes 8-1 on the base 8, thereby completing the preliminary positioning of the frame body 9-1; after completing the preliminary positioning, the lever cylinder 6-4 is started, so that the two adjacent vertical surfaces of the first positioning block 6-1 are respectively in contact with the adjacent right-angle surfaces of the first support block 9-5 and the frame body 9-1, and the two adjacent vertical surfaces of the second positioning block 6-2 are respectively in contact with the adjacent right-angle surfaces of the second support block 9-6 and the frame body 9-1, thereby completing the final positioning of the frame body 9-1. The specific situation is as follows Fig. 9 After the frame body 9 - 1 is finally positioned, the frame body 9 - 1 and the base 8 are locked and connected by using the rotary lock assembly 1 .

[0034] After the final positioning of the frame body 9-1 is completed, the front support body 9-4 and the axle bracket 9-7 need to be welded on the frame body 9-1.

[0035] In order to accurately position the front support body 9-4, as Figure 1As shown, this embodiment also includes a push positioning assembly 5 and a right angle stopper 4 connected at one end of the base 8 for positioning the front support 9-4. Two groups of right angle stoppers 4 are provided, and the two groups of right angle stoppers 4 are respectively connected to their corresponding rotary lock shafts 1-2 and are symmetrically arranged.

[0036] like Figure 4 As shown, in this embodiment, the right-angle limiter 4 includes a mounting sleeve 4-2 which is sleeved on the rotary lock shaft 1-2 and fixedly connected thereto, a limit horizontal plate portion 4-3 is fixedly connected to the top of the mounting sleeve 4-2, one end of the limit horizontal plate portion 4-3 is in contact with the front support body 9-4, and the other opposite end is fixedly connected to a limit vertical plate portion 4-1 in contact with the frame body 9-1. Fig. 9 As shown, when the frame body 9-1 and the base 8 are in a locked connection state, the opposite ends of the two sets of limiting horizontal plate parts 4-3 are in close contact with the two opposite edges of the lower part of the front support body 9-4; the outer side surfaces of the limiting vertical plate parts 4-1 of the two sets of limiting horizontal plate parts 4-3 are in close contact with the inner side surfaces of the frame body 9-1, thereby achieving right-angle positioning. By setting two sets of right-angle limiting parts 4, the front support body 9-4 is positioned on the central axis of the length direction of the frame body 9-1.

[0037] The front support body 9-4 can be positioned for a second time by setting the push positioning assembly 5, so that the position of the front support body 9-4 on the central axis in the length direction of the frame body 9-1 is fixed. Figure 5 In this embodiment, the pushing and positioning assembly 5 includes two groups of push plate pillars 5-4 arranged in parallel and fixedly connected to the base 8, and a group of laterally arranged push plates 5-5 are rotatably connected to the top of the two groups of push plate pillars 5-4; the two groups of push plate pillars 5-4 are arranged in parallel and are connected to their respective corresponding push plate pillars 5-4 in the middle; a driving connecting plate 5-6 is arranged at the end of the push plate 5-5 away from the right-angle limit member 4, and the two ends of the driving connecting plate 5-6 are respectively hinged to the two groups of push plates 5-5.

[0038] The push positioning assembly 5 also includes a push cylinder 5-1 which is arranged transversely and whose cylinder barrel is hinged to the base 8. The extended end of the push cylinder 5-1 is hinged to the driving connecting plate 5-6. In this embodiment, a cylinder support 5-2 is fixed to the base 8, and a cylinder hinge seat 5-3 is fixed to the cylinder support 5-2. The cylinder hinge seat 5-3 is hinged to the cylinder barrel of the push cylinder 5-1.

[0039] Working principle of the pushing positioning component 5: The pushing positioning component 5 utilizes the connecting rod principle. The protruding end of the pushing cylinder 5-1 drives the driving connecting plate 5-6 to move. The driving connecting plate 5-6 drives the two groups of parallel push plate pillars 5-4 to rotate synchronously around the central axis of the push plate pillars 5-4. The synchronous movement of the two groups of parallel push plate pillars 5-4 can push the front support body 9-4 after the right-angle limiter 4 is positioned, so that the front support body 9-4 moves to the preset position on the central axis in the length direction of the frame body 9-1, thereby completing the final positioning.

[0040] In order to accurately position the axle bracket 9-7, Figure 1 As shown, this embodiment also includes a bracket positioning assembly 7 connected to the base 8 for positioning the axle bracket 9-7. Figure 6 In this embodiment, the bracket positioning assembly 7 includes two groups of parallel beam pillars 7-1 fixedly connected to the base 8, and the tops of the two groups of beam pillars 7-1 are detachably connected with connecting beams 7-5, and the two ends of the connecting beams 7-5 are connected with positioning pressing pieces 7-2, and the positioning pressing pieces 7-2 are provided with notches that match the top outer contour of the axle bracket 9-7; a group of clamping plate connecting rods 7-3 are rotatably connected to the two ends of the connecting beams 7-5, and the two groups of clamping plate connecting rods 7-3 are located below the corresponding positioning pressing pieces 7-2, and a group of positioning clamping plates 7-4 extending radially thereof are fixedly connected to the outer peripheral wall of each group of clamping plate connecting rods 7-3. Open grooves are provided at the two ends of the connecting beams 7-5, and notches corresponding to the open grooves on the connecting beams 7-5 are provided at the outer ends of the positioning clamping plates 7-4. In actual use, the positioning pressing piece 7-2 can clamp and position the axle bracket 9-7 so that the side surface of the axle bracket 9-7 is pressed against the inner side surface of the connecting beam 7-5 and the lower end is pressed against the frame body 9-1. After the clamping is completed, the clamp connecting rod 7-3 is rotated so that the positioning clamp 7-4 and the connecting beam 7-5 are in a parallel state, and then bolts are inserted into the notch of the positioning clamp 7-4 and the open groove of the connecting beam 7-5.

[0041] Working principle:

[0042] In the actual working process, the frame body 9-1 is first placed on the base 8, so that the multiple groups of rotating blocks 1-1 in the rotary lock assembly 1 correspond to the multiple groups of rotary lock holes 8-1 on the base 8, thereby completing the preliminary positioning of the frame body 9-1; after completing the preliminary positioning, the frame body positioning assembly 6 is used to perform the final positioning of the frame body 9-1, as shown in the specific situation. Fig. 9As shown. After the frame body 9-1 is finally positioned, the frame body 9-1 and the base 8 are locked and connected by using the rotary lock assembly 1. After the frame body 9-1 is finally positioned, the front support body 9-4 and the axle bracket 9-7 need to be welded on the frame body 9-1; the front support body 9-4 is positioned on the central axis of the length direction of the frame body 9-1 by using two sets of right-angle limiters 4, and then the front support body 9-4 is pushed on the central axis of the length direction of the frame body 9-1 by using the push positioning assembly 5 until it reaches the preset position, thereby completing the final positioning; the axle bracket 9-7 is clamped and positioned by using the bracket positioning assembly 7.

[0043] The invention has multi-point positioning for the placement of workpieces, which will not cause problems such as welding position deviation and poor welding precision, thereby improving the welding qualification rate, improving production efficiency, and ensuring that the scheduled work is completed within the construction period.

Claims

1. A trailer welding tool, characterized by: The invention comprises a base (8), wherein a plurality of groups of buckle units are arranged above the base (8), each group of buckle units comprises a first saddle-shaped buckle (2) and a second saddle-shaped buckle (3) respectively connected to a corresponding first limiting seat (9-2) and a second limiting seat (9-3), and the extension lines of the center lines of the first saddle-shaped buckle (2) and the second saddle-shaped buckle (3) intersect and are perpendicular in a horizontal plane; the invention also comprises a plurality of groups of rotary lock components (1) arranged on the base (8) for locking, connecting and releasing the frame body (9-1) and the base (8), each group of rotary lock components (1) being respectively engaged with the corresponding buckle units; the invention also comprises a push positioning component (5) and a right-angle limiting member (4) connected at one end of the base (8) for positioning the front support body (9-4); the invention also comprises a bracket positioning component (7) connected on the base (8) for positioning the axle bracket (9-7); and the invention also comprises a frame positioning component (6) for positioning the frame body (9-1); The rotary lock assembly (1) comprises a rotary lock mounting plate (1-4) connected to a vehicle frame (9-1); a rotary lock bottom box (1-5) is fixedly connected to the top of the rotary lock mounting plate (1-4); and a rotary lock spring sheet (1-6) is fixedly connected to the top of the rotary lock bottom box (1-5); a through hole is opened at the center of the rotary lock mounting plate (1-4); a rotating shaft sleeve (1-3) fixedly connected to the rotating shaft sleeve (1-3) is passed through the through hole; a rotary lock rotating shaft sleeve (1-3) is passed through the rotating shaft sleeve (1-3) and is rotatably connected to the rotating shaft sleeve (1-3). A shaft (1-2), a rotating block (1-1) is connected to the lower end of the rotating lock shaft (1-2), and a rotating lock handle (1-10) is connected to the upper end, and the rotating lock handle (1-10) is engaged with the buckle unit; a limit lock nut (1-7) in contact with the rotating lock spring sheet (1-6) is screwed on the rotating lock shaft (1-2); and a rotating lock hole (8-1) is provided on the base (8) and is adapted to the outer contour of the rotating block (1-1) and can be passed through by the rotating block (1-1); The rotary lock assembly (1) also includes a rotary shaft cap (1-9) detachably connected to the top of the rotary lock rotary shaft (1-2); the rotary lock handle (1-10) is L-shaped and the rotary lock handle (1-10) is fixedly connected to the rotary shaft cap (1-9); Two groups of inclined chamfers (1-1-1) arranged in a centrally symmetrical manner are arranged on the top of the rotating block (1-1); A through hole extending in the radial direction is provided on the rotary lock shaft (1-2), and a limit pin (1-8) is inserted into the through hole. The limit pin (1-8) is inserted into a through groove provided on the limit lock nut (1-7); Two groups of right-angle limiters (4) are provided, and the two groups of right-angle limiters (4) are respectively connected to their corresponding rotary lock shafts (1-2); the right-angle limiters (4) comprise a mounting sleeve (4-2) sleeved on the rotary lock shaft (1-2) and fixedly connected thereto, a limit transverse plate portion (4-3) fixedly connected to the top of the mounting sleeve (4-2), one end of the limit transverse plate portion (4-3) being in contact with the front support body (9-4), and the other opposite end being fixedly connected to a limit vertical plate portion (4-1) in contact with the frame body (9-1); the two groups of right-angle limiters (4) are symmetrically arranged.

2. The trailer welding tool as claimed in claim 1, characterized in that: The push positioning assembly (5) comprises two groups of push plate pillars (5-4) arranged in parallel and fixedly connected to the base (8); a group of push plates (5-5) arranged transversely are rotatably connected to the tops of the two groups of push plate pillars (5-4); the two groups of push plate pillars (5-4) are arranged in parallel and are connected to the corresponding push plate pillars (5-4) at the middle; a driving connecting plate (5-6) is arranged at the end of the push plate (5-5) away from the right-angle limiter (4), and the two ends of the driving connecting plate (5-6) are respectively hinged to the two groups of push plates (5-5); and also comprises a push cylinder (5-1) arranged transversely and the cylinder barrel of which is hinged to the base (8), and the protruding end of the push cylinder (5-1) is hinged to the driving connecting plate (5-6).

3. The trailer welding tool as claimed in claim 1, characterized in that: The frame positioning assembly (6) comprises a lever cylinder (6-4) connected to a base (8), a positioning mounting plate (6-3) fixedly connected to the movable end of the lever cylinder (6-4), and two groups of first positioning blocks (6-1) and two groups of second positioning blocks (6-2) fixedly connected to the bottom surface of the positioning mounting plate (6-3).

4. The trailer welding tool as claimed in claim 1, characterized in that: The bracket positioning assembly (7) comprises two groups of parallelly arranged crossbeam pillars (7-1) fixedly connected to the base (8); a connecting crossbeam (7-5) is detachably connected to the top of the two groups of crossbeam pillars (7-1); positioning pressing pieces (7-2) are connected to both ends of the connecting crossbeam (7-5); and a notch matching the top outer contour of the axle bracket (9-7) is provided on the positioning pressing piece (7-2); a group of clamping plate connecting rods (7-3) are rotatably connected to both ends of the connecting crossbeam (7-5); the two groups of clamping plate connecting rods (7-3) are located below their respective corresponding positioning pressing pieces (7-2); and a group of positioning clamping plates (7-4) extending radially thereof are fixedly connected to the outer peripheral wall of each group of clamping plate connecting rods (7-3).

Images