Welding device for dozer blade support of excavator

Abstract

The invention discloses an excavator dozer blade support welding device, and belongs to the technical field of dozer blade support welding machining. An excavator dozer blade support welding device comprises a base, two slidable moving frames are correspondingly arranged in the base, two arc-shaped frames are correspondingly and fixedly installed on the surface of the top end of any moving frame, the surfaces of the two arc-shaped frames are jointly and slidably connected with arc-shaped blocks matched with the arc-shaped frames, and a shovel plate is jointly placed on the surfaces of the two arc-shaped blocks. Two rotating grooves are correspondingly formed in the inner side face of any arc-shaped block, rotating blocks are rotationally connected into the rotating grooves, and clamping grooves used for fixing and limiting the shovel plates are formed in the end surfaces of the rotating blocks. Compared with a traditional welding process, the welding device for the dozer blade support of the excavator has the advantages that the stability in the welding process of the support body and the shovel plate is guaranteed, the welding precision of the contact part of the arc-shaped plate and the shovel plate is improved, the welding speed is increased, the welding quality is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bulldozer bracket welding processing, and more specifically to a bulldozer bracket welding device for an excavator. Background Art

[0002] The excavator bulldozer is an important working device, which is used for pushing and leveling earth and stone under various working conditions. The bulldozer is connected to the excavator through a bracket. Before assembling the bulldozer to the excavator, the bulldozer bracket needs to be welded to the outer surface of the bulldozer. A welding device is required to weld the bracket to the outer surface of the bulldozer.

[0003] There are two main traditional bulldozer bracket welding methods, but both methods have certain limitations. The first method is to cover the bulldozer on the ground with the outer surface of the bulldozer facing upward, lift the bracket through external lifting equipment and transport it to the outer surface of the bulldozer, and then the personnel use the welding head to weld the contact part between the bracket and the bulldozer. However, this method is easily affected by external factors such as wind, causing the bracket to shake when in contact with the surface of the bulldozer, thereby affecting the accuracy of the welding position and reducing the welding rate and welding quality. The second method is to place the bulldozer on a supporting frame with the outer surface of the bulldozer facing the ground, and then place the bracket from the bottom of the bulldozer. Due to limited space at the bottom, personnel need to curl up for welding, which not only increases labor intensity, but also easily leads to fatigue of personnel, further affecting welding efficiency and quality. Summary of the invention

[0004] The object of the present invention is to provide a welding device for an excavator bulldozer bracket to solve the problems raised in the above background technology:

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The cam is an angular movement movement mechanism which allows the cam to move along a line that is adapted to move the cams relative to the base, wherein the cams have two opposite ends, and the ends are engaged with the cams and the two ends are engaged with the cam.

[0007] By adopting the above technical scheme, the shovel plate is lifted by the external lifting equipment and placed on the surface of the two arc blocks. After being placed on the surface of the arc blocks, the shovel plate is fixed by the card slot, and the two gears rotate with the arc teeth, so that the two arc blocks rotate and turn the shovel plate, and then the two bracket bodies are placed in the two placement slots, and the bracket body is pushed toward the shovel plate by personnel. At this time, the bracket body moves on the surface of the roller and moves the arc plate. When the arc plate contacts the position where the shovel plate needs to be welded, the elastic sheet clamps and fixes the bracket body. At this time, the arc plate and the shovel plate match and contact each other, and then the personnel pick up the welding gun and weld the contact part between the arc plate and the shovel plate. Compared with the traditional welding process, the welding device improves the welding accuracy of the contact part between the arc plate and the shovel plate, thereby improving the welding speed and welding quality, and reducing the labor intensity of the workers.

[0008] Preferably, an arc-shaped slide groove is provided on the surface of any one of the arc-shaped frames, a pulley device is provided between the arc-shaped slide groove and the arc-shaped block, and the arc-shaped block is slidably connected to the arc-shaped frame by cooperating with the arc-shaped slide groove through the pulley device.

[0009] By adopting the above technical solution and setting the pulley device, it is ensured that the arc block moves more smoothly on the surface of the arc frame.

[0010] Preferably, any one of the movable frames is provided with a slot inside, the inner wall of the slot is rotatably connected to a rotating shaft, a gear is coaxially fixedly mounted on the surface of the rotating shaft, and an arc-shaped tooth meshing with the gear is fixedly mounted on the outer surface of the arc block.

[0011] Preferably, a spring shaft is provided on the surface of the rotating block, and the rotating block is rotatably connected to the rotating groove via the spring shaft. Slots are provided on the side surfaces of the arc block and the rotating block, and pins for fixing the rotating block are inserted into the slots.

[0012] By adopting the above technical solution, after the latch is plugged into the slot, it is used to fix the rotating block.

[0013] Preferably, a slot is provided on the end surface of the drawer, an elastic sheet for locking the bracket body is rotatably connected inside the slot, an elastic reset shaft is provided between the elastic sheet and the slot, the elastic sheet is rotatably connected to the slot via the elastic reset shaft, and a paddle is fixedly mounted on the surface of the elastic sheet.

[0014] By adopting the above technical solution, when the arc plate contacts the position where the shovel plate needs to be welded, the pushing of the bracket body is stopped, and then the bracket body is clamped and fixed by the elastic sheet.

[0015] Preferably, a first motor is fixedly mounted on the surface of one of the movable frames, an output end of the first motor is fixedly connected to a rotating shaft, a spline and a key cylinder are fixedly mounted on one end of the two rotating shafts respectively, and the spline and the key cylinder are matched and plugged into each other.

[0016] By adopting the above technical solution and through the design of splines and key cylinders, the two moving frames can move towards each other or in opposite directions, thereby ensuring the power transmission of the rotating shaft.

[0017] Preferably, the inner bottom surface of the placement groove is rotatably connected with a roller, and when the bracket body moves in the placement groove via the roller, the bracket body moves more steadily and smoothly.

[0018] Preferably, counterweight racks are fixedly mounted on both side surfaces of the base, and the counterweight racks are used for overall balance of the device. A placement buckle is fixedly mounted on the surface of one of the storage racks, and the welding gun is placed on the surface of the storage rack through the placement buckle.

[0019] By adopting the above technical solution, the counterweight frame ensures that the large bulldozer is more stable during the welding process.

[0020] Preferably, a bidirectional screw rod is rotatably connected inside the base, and the surface of the bidirectional screw rod is threadedly connected to the two movable frames.

[0021] By adopting the above technical solution, the second motor rotates to drive the bidirectional screw rod to rotate, so that the two movable frames move toward each other or in opposite directions, so that the two arc blocks follow the movement of the movable frames. According to the specifications of the shovel plate, the two arc blocks are adjusted to adapt to the shovel plate, thereby increasing the versatility and actual production practicability of the device.

[0022] Preferably, a second motor is fixedly mounted on one end surface of the base, and an output end of the second motor is fixedly connected to one end of the bidirectional lead screw.

[0023] By adopting the above technical solution, the rotation of the second motor can adjust the two arc blocks to adapt to the shovel plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) When the bulldozer bracket welding device is in use, the shovel plate is lifted by an external lifting device and placed on the surface of two arc blocks. After being placed on the surface of the arc blocks, the shovel plate is fixed by a slot, and the two gears rotate with the arc teeth, thereby causing the two arc blocks to rotate and flip the shovel plate. Then, the two bracket bodies are placed inside the two placement slots, and personnel push the bracket bodies toward the shovel plates. At this time, the bracket bodies move on the surface of the rollers and move with the arc plates. When the arc plates contact the positions where the shovel plates need to be welded, the elastic sheets clamp and fix the bracket bodies. At this time, the arc plates and the shovel plates match and contact each other. Then, personnel pick up the welding gun and weld the contact parts between the arc plates and the shovel plates. Compared with the traditional welding process, the welding device improves the welding accuracy of the contact parts between the arc plates and the shovel plates, thereby improving the welding speed and welding quality, and reducing the labor intensity of workers.

[0026] 2) When the excavator bulldozer bracket welding device is in use, the device always keeps the shovel plate and the bracket body stable during the welding process of the shovel plate and the bracket body, thereby achieving stability in the contact area between the shovel plate and the arc plate. When the welding gun welds the contact area between the shovel plate and the arc plate, stability is guaranteed during the welding process, and the welding accuracy of the contact area between the arc plate and the shovel plate is further improved.

[0027] 3) When the excavator bulldozer blade bracket welding device is in use, the second motor rotates to drive the bidirectional screw to rotate, thereby causing the two moving frames to move toward each other or in opposite directions, so that the two arc blocks follow the movement of the moving frames. According to the specifications of the shovel plate, the two arc blocks are adjusted to adapt to the shovel plate, thereby increasing the versatility and actual production practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the position structure of the base and the movable frame of the present invention;

[0030] Figure 3 It is a schematic diagram of the position structure of the arc frame and the arc block of the present invention;

[0031] Figure 4It is a schematic diagram of the position structure of the rotating groove and the rotating block of the present invention;

[0032] Figure 5 It is a schematic diagram of the arc-shaped tooth position structure of the present invention;

[0033] Figure 6 It is a schematic diagram of the rotating block structure of the present invention;

[0034] Figure 7 It is a schematic diagram of the matching structure of the spline and the key cylinder of the present invention;

[0035] Figure 8 It is a schematic diagram of the placement position of the bracket body of the present invention;

[0036] Fig. 9 It is a schematic diagram of the position of the placement slot of the present invention.

[0037] Explanation of the numbers in the figure: 1. base; 2. moving frame; 3. arc frame; 4. arc slide; 5. arc block; 6. pulley device; 7. rotating groove; 8. rotating block; 9. card slot; 10. shovel plate; 11. fixed frame; 12. storage rack; 13. drawer; 14. placement slot; 15. elastic sheet; 16. slot; 17. rotating shaft; 18. gear; 19. arc teeth; 20. spring shaft; 21. slot; 22. latch; 23. notch; 24. elastic reset shaft; 25. pick; 26. roller; 27. welding gun; 28. placement buckle; 29. ​​bracket body; 30. arc plate; 31. spline; 32. key cylinder; 33. first motor; 34. bidirectional screw rod; 35. second motor; 36. counterweight frame. DETAILED DESCRIPTION

[0038] Example 1: Please refer to Figure 1 - Fig. 9, a welding device for an excavator bulldozer support, comprising a base 1, wherein two slidable moving frames 2 are correspondingly arranged inside the base 1, and the moving frames 2 match the base 1 to ensure that the moving frames 2 move smoothly in the base 1, and two arc frames 3 are correspondingly fixedly installed on the top surface of any one of the moving frames 2, and the arc frames 3 are semicircular arc frames, and the surfaces of the two arc frames 3 are slidably connected with arc blocks 5 matching therewith, and the arc blocks 5 move around the center of the semicircular arc frames, and a shovel plate 10 is placed on the surfaces of the two arc blocks 5, and the shovel plate 10 is a conventional shovel arc plate in the prior art, and two rotating grooves 7 are correspondingly provided on the inner side surface of any one of the arc blocks 5, and a rotating block 8 is rotatably connected inside the rotating groove 7, and the end of the rotating block 8 The surface is provided with a card slot 9 for fixing and limiting the shovel plate 10, and a fixed frame 11 is fixedly installed on the side surface of any one of the mobile frames 2. The surfaces of the two fixed frames 11 are fixedly connected with storage frames 12, and the insides of the two storage frames 12 are slidably connected with matching drawers 13, and the surface of the drawers 13 is provided with a placement groove 14. According to the welding position of the shovel plate 10, the drawer 13 is pulled out so that the position of the placement groove 14 corresponds to the welding position of the shovel plate 10, and a bracket body 29 is placed inside the placement groove 14. One end surface of the two bracket bodies 29 is fixedly installed with an arc plate 30 matching the shovel plate 10, and a welding gun 27 is placed on the surface of one of the storage frames 12. The welding gun 27 is a conventional In the conventional welding head during the operation, the shovel plate 10 is lifted by an external lifting device and placed on the surface of the two arc blocks 5. After being placed on the surface of the arc blocks 5, the shovel plate 10 is fixed by the slot 9. The two gears 18 rotate and the arc teeth 19 rotate, so that the two arc blocks 5 rotate and turn the shovel plate 10. Then, the two bracket bodies 29 are placed inside the two placement slots 14, and the bracket bodies 29 are pushed toward the shovel plate 10 by personnel. At this time, the bracket body 29 moves on the surface of the roller 26 and moves with the arc plate 30. When the arc plate 30 contacts the position where the shovel plate 10 needs to be welded, the elastic sheet 15 clamps and fixes the bracket body 29. At this time, the arc plate 30 and the shovel plate 10 are mutually connected. Matching contact, then the personnel pick up the welding gun 27 and weld the contact part between the arc plate 30 and the shovel plate 10. Compared with the traditional welding process, the welding device improves the welding accuracy of the contact part between the arc plate 30 and the shovel plate 10, thereby improving the welding speed and welding quality, and reducing the labor intensity of the workers; during the welding process of the shovel plate 10 and the bracket body 29, the device always keeps the shovel plate 10 and the bracket body 29 stable, thereby achieving the stability of the contact part between the shovel plate 10 and the arc plate 30. When the welding gun 27 welds the contact part between the shovel plate 10 and the arc plate 30, the stability of the welding process is guaranteed, and the welding accuracy of the contact part between the arc plate 30 and the shovel plate 10 is further improved.

[0039] An arc-shaped slide groove 4 is provided on the surface of any arc-shaped frame 3, and a pulley device 6 is provided between the arc-shaped slide groove 4 and the arc-shaped block 5. The arc-shaped block 5 cooperates with the arc-shaped slide groove 4 through the pulley device 6 to be slidably connected with the arc-shaped frame 3. The setting of the pulley device 6 ensures that the arc-shaped block 5 moves more smoothly on the surface of the arc-shaped frame 3.

[0040] A slot 16 is provided inside any of the moving frames 2 , and a shaft 17 is rotatably connected to the inner wall of the slot 16 . A gear 18 is coaxially fixedly mounted on the surface of the shaft 17 . An arc-shaped tooth 19 meshing with the gear 18 is fixedly mounted on the outer surface of the arc block 5 .

[0041] A spring shaft 20 is provided on the surface of the rotating block 8, and the spring shaft 20 is a conventional spring shaft 20 in the prior art. The rotating block 8 is rotatably connected to the rotating groove 7 through the spring shaft 20. The side surfaces of the arc block 5 and the rotating block 8 are both provided with a slot 21. The inside of the slot 21 is plugged with a pin 22 for fixing the rotating block 8. After the pin 22 is plugged into the slot 21, it is used to fix the rotating block 8.

[0042] A notch 23 is provided on the end surface of the drawer 13, and an elastic sheet 15 for locking the bracket body 29 is rotatably connected inside the notch 23. The elastic sheet 15 is a conventional elastic sheet 15 in the prior art. An elastic reset shaft 24 is provided between the elastic sheet 15 and the notch 23. The elastic sheet 15 is rotatably connected to the notch 23 through the elastic reset shaft 24. A paddle 25 is fixedly installed on the surface of the elastic sheet 15. When the arc plate 30 contacts the position where the shovel plate 10 needs to be welded, the pushing of the bracket body 29 is stopped, and the bracket body 29 is clamped and fixed by the elastic sheet 15.

[0043] A first motor 33 is fixedly installed on the surface of one of the mobile frames 2. The first motor 33 is a conventional forward and reverse motor in the prior art. The output end of the first motor 33 is fixedly connected to the rotating shaft 17. A spline 31 and a key cylinder 32 are fixedly installed at one end of the two rotating shafts 17 respectively. The spline 31 and the key cylinder 32 are matched and plugged into each other. Through the design of the spline 31 and the key cylinder 32, the two mobile frames 2 can move towards each other or in opposite directions, which can ensure the power transmission of the rotating shaft 17.

[0044] The inner bottom surface of the placement groove 14 is rotatably connected with a roller 26 , and when the bracket body 29 moves in the placement groove 14 via the roller 26 , the bracket body 29 moves more steadily and smoothly.

[0045] The two side surfaces of the base 1 are fixedly mounted with counterweight racks 36, which are used for the overall balance of the device. A placement buckle 28 is fixedly mounted on the surface of one of the storage racks 12, and the welding gun 27 is placed on the surface of the storage rack 12 through the placement buckle 28.

[0046] The use steps of the present invention are as follows: when the bulldozer bracket welding device of the excavator is in use, the latch 22 is first pulled out from the slot 21. At this time, the rotating block 8 rotates under the action of the spring shaft 20, and the shovel plate 10 is lifted by an external lifting device and placed on the surface of the two arc blocks 5. During the placement process, the shovel plate 10 squeezes the rotating block 8. At this time, the rotating block 8 rotates and is stored in the rotating groove 7. When the rotating block 8 is not squeezed, the rotating block 8 is reset so that the slot 9 fixes the surface of the shovel plate 10. The first motor 33 rotates to drive the rotating shaft 17 to rotate. The spline 31 and the key cylinder 32 are matched and plugged with each other, so that the two gears 18 rotate to drive the arc teeth 19 to rotate, and then the two arc blocks 5 rotate to drive the shovel plate 10 to flip. According to the welding position of the shovel plate 10, The drawer 13 is pulled out so that the position of the placement groove 14 corresponds to the welding position of the shovel plate 10, and then the two bracket bodies 29 are placed inside the two placement grooves 14, and the bracket body 29 is pushed toward the shovel plate 10 by a person. At this time, the bracket body 29 moves on the surface of the roller 26 with the arc plate 30. When the arc plate 30 contacts the position where the shovel plate 10 needs to be welded, the pushing of the bracket body 29 is stopped, and the bracket body 29 is clamped and fixed by the elastic sheet 15. At this time, the arc plate 30 and the shovel plate 10 match and contact each other, and then the person picks up the welding gun 27 and welds the contact part between the arc plate 30 and the shovel plate 10. After the welding is completed, the rotating block 8 is first turned outward to make the slot 9 separate from the shovel plate 10, The welded bulldozer is then hoisted by an external hoisting device. The shovel plate 10 is hoisted by an external hoisting device and placed on the surface of the two arc blocks 5. After being placed on the surface of the arc blocks 5, the shovel plate 10 is fixed by the slot 9. The two gears 18 rotate with the arc teeth 19, so that the two arc blocks 5 rotate and turn the shovel plate 10. Then, the two bracket bodies 29 are placed inside the two placement slots 14, and the bracket bodies 29 are pushed toward the shovel plate 10 by personnel. At this time, the bracket body 29 moves on the surface of the roller 26 and moves with the arc plate 30. When the arc plate 30 contacts the position where the shovel plate 10 needs to be welded, the elastic sheet 15 clamps and fixes the bracket body 29. At this time, the arc plate 30 and the shovel plate 10 are matched and contacted with each other, and then the personnel pick up the welding gun 27 and weld the contact part between the arc plate 30 and the shovel plate 10. Compared with the traditional welding process, the welding device improves the welding accuracy of the contact part between the arc plate 30 and the shovel plate 10, thereby improving the welding speed and welding quality, and reducing the labor intensity of the workers; during the welding process of the shovel plate 10 and the bracket body 29, the device always keeps the shovel plate 10 and the bracket body 29 stable, thereby achieving the stability of the contact part between the shovel plate 10 and the arc plate 30. When the welding gun 27 welds the contact part between the shovel plate 10 and the arc plate 30, the stability of the welding process is guaranteed, and the welding accuracy of the contact part between the arc plate 30 and the shovel plate 10 is further improved.

[0047] Example 2: Please refer to Figure 1 - Fig. 9 The difference between the embodiment 1 and the embodiment 1 is that the base 1 is internally rotatably connected with a bidirectional screw rod 34, and the surface of the bidirectional screw rod 34 is threadedly connected to the two moving frames 2. The second motor 35 rotates with the bidirectional screw rod 34, so that the two moving frames 2 move toward each other or in opposite directions, so that the two arc blocks 5 follow the movement of the moving frames 2. According to the specifications of the shovel plate 10, the two arc blocks 5 are adjusted to adapt to the shovel plate 10, thereby increasing the versatility and actual production practicability of the device.

[0048] A second motor 35 is fixedly mounted on one end surface of the base 1. The second motor 35 is a conventional forward and reverse motor in the prior art. The output end of the second motor 35 is fixedly connected to one end of the bidirectional screw rod 34. The rotation of the second motor 35 can adjust the two arc blocks 5 to adapt to the shovel plate 10.

[0049] The use steps of the present invention are as follows: when the excavator bulldozer bracket welding device is in use, the existing excavators have different sizes and specifications, and the installed bulldozers have different sizes. When welding shovel plates 10 of different sizes, the second motor 35 rotates with the bidirectional screw rod 34, so that the two moving frames 2 move toward each other or in opposite directions, so that the two arc blocks 5 follow the movement of the moving frames 2, and ensure that the distance between the two arc blocks 5 can be suitable for the length of the shovel plate 10. This scheme rotates the second motor 35 with the bidirectional screw rod 34, so that the two moving frames 2 move toward each other or in opposite directions, so that the two arc blocks 5 follow the movement of the moving frames 2. According to the specifications of the shovel plate 10, the two arc blocks 5 are adjusted to adapt to the shovel plate 10, thereby increasing the versatility and actual production practicability of the device.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding device for an excavator bulldozer support, comprising a base (1), characterized in that: Two slidable moving frames (2) are correspondingly arranged inside the base (1), and two arc frames (3) are correspondingly fixedly installed on the top surface of any one of the moving frames (2), and the surfaces of the two arc frames (3) are slidably connected with arc blocks (5) matching therewith, and a shovel plate (10) is placed on the surfaces of the two arc blocks (5), and two rotating grooves (7) are correspondingly provided on the inner side surface of any one of the arc blocks (5), and a rotating block (8) is rotatably connected inside the rotating groove (7), and a clamping groove (9) for fixing and limiting the shovel plate (10) is provided on the end surface of the rotating block (8). A fixed frame (11) is fixedly mounted on the side surface of any one of the movable frames (2); a storage frame (12) is fixedly connected to the surfaces of the two fixed frames (11); a matching drawer frame (13) is slidably connected to the inside of the two storage frames (12); a placement groove (14) is provided on the surface of the drawer frame (13); a bracket body (29) is placed inside the placement groove (14); an arc plate (30) matching the shovel plate (10) is fixedly mounted on one end surface of the two bracket bodies (29); a welding gun (27) is placed on the surface of one of the storage frames (12).

2. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: The surface of any one of the arc-shaped frames (3) is provided with an arc-shaped slide groove (4), a pulley device (6) is provided between the arc-shaped slide groove (4) and the arc-shaped block (5), and the arc-shaped block (5) cooperates with the arc-shaped slide groove (4) through the pulley device (6) so as to be slidably connected with the arc-shaped frame (3).

3. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: Any one of the movable frames (2) is provided with a slot (16) inside, the inner wall of the slot (16) is rotatably connected to a rotating shaft (17), a gear (18) is coaxially fixedly mounted on the surface of the rotating shaft (17), and an arc-shaped tooth (19) meshing with the gear (18) is fixedly mounted on the outer surface of the arc block (5).

4. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: A spring shaft (20) is arranged on the surface of the rotating block (8), and the rotating block (8) is rotatably connected to the rotating groove (7) via the spring shaft (20). The side surfaces of the arc block (5) and the rotating block (8) are both provided with a slot (21), and a latch (22) for fixing the rotating block (8) is inserted into the interior of the slot (21).

5. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: The end surface of the drawer (13) is provided with a notch (23), the inside of the notch (23) is rotatably connected with an elastic sheet (15) for locking the bracket body (29), an elastic reset shaft (24) is arranged between the elastic sheet (15) and the notch (23), the elastic sheet (15) is rotatably connected with the notch (23) via the elastic reset shaft (24), and a paddle (25) is fixedly mounted on the surface of the elastic sheet (15).

6. The welding device for an excavator bulldozer bracket according to claim 3, characterized in that: A first motor (33) is fixedly mounted on the surface of one of the movable frames (2), and an output end of the first motor (33) is fixedly connected to a rotating shaft (17). A spline (31) and a key cylinder (32) are fixedly mounted on one end of the two rotating shafts (17), respectively, and the spline (31) and the key cylinder (32) are matched and plugged into each other.

7. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: The inner bottom surface of the placement groove (14) is rotatably connected to a roller (26), and when the bracket body (29) moves in the placement groove (14) via the roller (26), the bracket body (29) moves more steadily and smoothly.

8. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: Counterweight frames (36) are fixedly mounted on both side surfaces of the base (1), and the counterweight frames (36) are used for the overall balance of the device. A placement buckle (28) is fixedly mounted on the surface of one of the storage racks (12), and the welding gun (27) is placed on the surface of the storage rack (12) via the placement buckle (28).

9. The welding device for an excavator bulldozer bracket according to claim 1, characterized in that: A bidirectional screw rod (34) is rotatably connected inside the base (1), and the surface of the bidirectional screw rod (34) is threadedly connected to the two moving frames (2).

10. The welding device for the support of an excavator bulldozer according to claim 9, characterized in that: A second motor (35) is fixedly mounted on one end surface of the base (1), and an output end of the second motor (35) is fixedly connected to one end of a bidirectional screw rod (34).

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