A fixing welding device for the swing frame of the rear axle of an underground scraper

Abstract

The present invention discloses a device for fixing and welding a swing frame of a rear axle of an underground scraper loader, which relates to the technical field of welding and comprises a tooling base, on which two first lifting devices, four second lifting devices and one third lifting device are arranged, each of the first lifting devices is arranged with a bearing seat, each of the bearing seat is arranged with an elastic bending structure, and each of the second lifting devices is arranged with a fixed seat. The present invention adjusts the height of the elastic bending structure to carry a workpiece through the first lifting device, and the elastic bending structure undergoes elastic deformation when carrying the workpiece, so that the workpiece is restricted from rolling to both sides under the elastic force of the elastic bending structure, thereby avoiding the need to wait for the workpiece to be stationary and consuming a lot of time, so that the two ends of the elastic bending structure can be directly pulled by the locking structure to move toward each other until they contact the surface of the workpiece, thereby fixing the workpiece, ensuring the stability of the workpiece during welding, and improving the welding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a fixing welding device for a rear axle swing frame of an underground scraper. Background Art

[0002] An underground scraper is a mechanical device based on a hydraulic control system, which is widely used in mining, underground engineering construction and other fields. It picks up and transports ore or waste materials through a bucket. In order to adapt to the unevenness of the underground working site, the rear axle or body of the underground scraper swings left and right along the longitudinal center line of the vehicle to make the four wheels touch the ground, increase the traction and the bucket's shoveling force, so the rear drive axle swinging structure is often used to achieve four-wheel touch the ground.

[0003] The swing frame of the rear frame of the underground scraper loader is fixed in a double-supported manner. The fixing effect of the existing welding tooling is not good. The position between the rear frame of the scraper loader and the swing frame cannot be accurately aligned, and it is easy to shake and dislocate during welding. The fixing error on site according to the installation drawing is large, which affects the welding quality. The existing invention patent with patent announcement number CN117697304B discloses a fixing welding tool for the swing frame of the rear axle of the underground scraper loader. The mounting frame, the first fixing mechanism and the second fixing mechanism are installed by setting a base, so that several support plates are installed inside the mounting frame. The support plate, the first fixing mechanism and the second fixing mechanism clamp the rear axle bearing and support the bottom of the scraper body. The rear axle is installed inside the swing frame, and the swing frame is lifted and fixed by the support plate to position and connect the rear axle, the swing frame and the scraper body.

[0004] However, this invention patent also has corresponding defects: when the workpiece, i.e., the rear axle swing frame, is placed on the first fixing mechanism and the second fixing mechanism, due to the large mass of the workpiece itself, the connecting mechanisms and the bent plates on the first fixing mechanism and the second fixing mechanism are arc-shaped, and the workpiece cannot be accurately placed at the lowest point on the connecting mechanism and the bent plate. Therefore, the workpiece will roll back and forth on the connecting mechanism and the bent plate for a period of time before it can come to a standstill. Only then can the workpiece be fixed by the pressure plate, which takes a long time and results in low welding efficiency. If the workpiece is fixed during the rolling process of the workpiece, it will result in incomplete contact between the workpiece and the lowest point of the connecting mechanism and the bent plate when the workpiece is fixed, resulting in poor stability after the workpiece is fixed, affecting the welding quality. Moreover, if other mechanical equipment is used to limit the rolling of the workpiece, due to the large mass of the workpiece, the workpiece will be damaged by collision when the mechanical equipment contacts it. Summary of the invention

[0005] The purpose of the present invention is to provide a device for fixing and welding a swing frame of a rear axle of an underground scraper, which solves the problem in the prior art that a workpiece rolls back and forth when placed, which wastes time and reduces welding efficiency.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A device for fixing and welding a swing frame of a rear axle of an underground scraper loader comprises a tooling base, on which are arranged two first lifting devices, four second lifting devices and one third lifting device, each of the first lifting devices is provided with a bearing seat, each of the bearing seats is provided with an elastic bending structure for bearing a workpiece, each of the second lifting devices is provided with a fixed seat, each of the fixed seats is provided with a linear moving device, each of the linear moving devices is provided with a locking structure, the third lifting device is provided with a bearing device for bearing the swing frame, and the bearing device is located between the two elastic bending structures, the tooling base is also provided with a welding mechanism for installing a welding gun for welding, and the welding mechanism can slide around the center of the tooling base.

[0008] Among them, the elastic bending structure bends and deforms in contact with the surface of the workpiece when carrying the workpiece, and can automatically reset to an arc shape through elastic force after the workpiece is detached. The locking structure is used to hook one end of the elastic bending structure and move it toward the other end to fix the workpiece, and when fixing the workpiece, the elastic bending structure locks its own maximum deformation state.

[0009] As a preferred solution of the present invention, the elastic bending structure includes a limit seat fixedly arranged on the bearing seat, an arc-shaped groove is opened on the top of the limit seat, and a plurality of mounting grooves are opened in sequence along a horizontal straight line on the inner wall of the arc-shaped groove, and an elastic bearing member is arranged in each of the mounting grooves, and each of the elastic bearing members includes a first elastic member and two second elastic members, and the first elastic member is located in the middle position of the bottom of the mounting groove and can be elastically deformed in the vertical direction, and the two second elastic members are symmetrical about the center of the first elastic member and are obliquely arranged on the inner side wall of the mounting groove, and each of the elastic bearing members is provided with a bending bearing member for carrying a workpiece, and the bending bearing member is arc-shaped and can be bent, the bending bearing member is fixedly connected to the top of the first elastic member, and the bending bearing member is slidably connected to the top of the two second elastic members, and the corresponding two locking structures respectively pull the two ends of the bending bearing member to move toward each other to fix the workpiece, and a plurality of downward pressing fixing members are also arranged on the inner side wall of the mounting groove, and the downward pressing fixing member is used to limit the first elastic member to a maximum deformation when fixing the workpiece.

[0010] As a preferred solution of the present invention, the curved bearing member includes an arc-shaped base fixedly arranged on the top of the first elastic member, both sides of the arc-shaped base are rotatably connected with arc-shaped side pressure plates through torsion springs, and the arc-shaped outer walls of the arc-shaped side pressure plates are slidably connected with the corresponding two second elastic members, the top of each of the arc-shaped side pressure plates is rotatably connected with an arc-shaped top pressure plate through a torsion spring, each of the arc-shaped top pressure plates is provided with an avoidance groove, and the avoidance grooves of the two opposite arc-shaped top pressure plates are staggered with each other, and the arc-shaped base, the two arc-shaped side pressure plates and the two arc-shaped top pressure plates together constitute an arc-shaped plate body.

[0011] As a preferred solution of the present invention, the second elastic member includes a fixed cylinder obliquely arranged on the inner wall of the mounting groove, a sliding column is slidably connected to the inside of the fixed cylinder through a spring, and the top of the sliding column is slidably connected to the arc-shaped side pressure plate, and an electromagnet for adsorbing the sliding column is arranged at the inner bottom of the fixed cylinder.

[0012] As a preferred solution of the present invention, the downward pressure fixing member includes a linear drive device arranged on the inner side wall of the mounting groove, and the linear drive device moves in a vertical direction, a hook plate is arranged on the linear drive device, a plurality of downward pressure rings are arranged at the bottom of the arc-shaped base, and the plurality of downward pressure rings are symmetrical about the first elastic member, and the hook plate is inserted into the plurality of downward pressure rings.

[0013] As a preferred solution of the present invention, the width of the arc-shaped base is greater than the width of the mounting groove, and the minimum height of the first elastic member is less than the depth of the mounting groove.

[0014] As a preferred solution of the present invention, the locking structure includes a moving seat arranged on a linear moving device, an extension plate parallel to the horizontal plane is arranged on the side of the moving seat facing the first lifting device, a plurality of hooks are arranged on one side of the extension plate through a torsion spring, and the top of each of the arc-shaped top pressure plates is rotatably connected to a fixing ring through a torsion spring, and the fixing ring is inclined upward along the horizontal plane.

[0015] As a preferred solution of the present invention, both the draw hook and the fixing ring are magnetic, and after the fixing ring is out of contact with the draw hook, the angle between the fixing ring and the outer wall of the arc-shaped top pressure plate is greater than zero degrees.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention adjusts the height of the elastic bending structure to carry the workpiece through the first lifting device, and the elastic bending structure undergoes elastic deformation when carrying the workpiece, so that the workpiece is restricted from rolling to both sides under the elastic force of the elastic bending structure, avoiding the need to wait for the workpiece to be stationary and wasting a lot of time. The two ends of the elastic bending structure can be directly pulled by the locking structure to move toward each other until they come into contact with the surface of the workpiece, thereby fixing the workpiece, ensuring the stability of the workpiece during welding, and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 A structural schematic diagram of a rear axle swing frame fixing welding device for an underground scraper is provided in accordance with an embodiment of the present invention;

[0020] Figure 2 A partial cross-sectional structural schematic diagram of a fixing welding device for a rear axle swing frame of an underground scraper is provided in accordance with an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of a pressing fixing member and a limiting seat is provided for an embodiment of the present invention;

[0022] Figure 4 An overall structural schematic diagram of a second elastic member is provided for an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the internal structure of a second elastic member is provided for an embodiment of the present invention;

[0024] Figure 6 Provided for embodiments of the present invention Figure 2 A schematic diagram of the structure enlargement of part A shown in FIG.

[0025] Figure 7 Provided for embodiments of the present invention Figure 2 The enlarged schematic diagram of the structure of part B shown in FIG.

[0026] Figure 8 A schematic diagram of the side structure of a fixing welding device for a rear axle swing frame of an underground scraper loader is provided in accordance with an embodiment of the present invention.

[0027] The numbers in the figure represent the following:

[0028] 1. Tooling base; 2. First lifting device; 3. Second lifting device; 4. Bearing seat; 5. Elastic bending structure; 6. Fixed seat; 7. Linear moving device; 8. Locking structure; 9. Third lifting device; 10. Bearing device;

[0029] 501, limit seat; 502, arc groove; 503, first elastic member; 504, second elastic member; 505, bending bearing member; 506, downward pressure fixing member; 507, arc base; 508, arc side pressure plate; 509, arc top pressure plate; 510, fixing cylinder; 511, spring; 512, sliding column; 513, linear drive device; 514, hook plate; 515, downward pressure ring; 516, installation groove; 517, avoidance groove; 801, movable seat; 802, extension plate; 803, pull hook; 804, fixing ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 8 As shown, the present invention provides a fixed welding device for the rear axle swing frame of an underground scraper loader, including a tooling base 1, on which are arranged two first lifting devices 2, four second lifting devices 3 and one third lifting device 9, each of the first lifting devices 2 is provided with a bearing seat 4, each of the bearing seats 4 is provided with an elastic bending structure 5 for bearing a workpiece, each of the second lifting devices 3 is provided with a fixed seat 6, each of the fixed seats 6 is provided with a linear moving device 7, each of the linear moving devices 7 is provided with a locking structure 8, the third lifting device 9 is provided with a bearing device 10 for bearing the workpiece, and the bearing device 10 is located between the two elastic bending structures 5, and the tooling base 1 is also provided with a welding mechanism for installing a welding gun for welding, and the welding mechanism can slide around the center of the tooling base 1.

[0032] Among them, the elastic bending structure 5 bends and deforms in contact with the surface of the workpiece when carrying the workpiece, and can automatically reset to an arc shape through elastic force after the workpiece is detached. The locking structure 8 is used to hook one end of the elastic bending structure 5 and move it toward the other end to fix the workpiece, and when fixing the workpiece, the elastic bending structure 5 locks its own maximum deformation state.

[0033] In actual application of the present application, the tooling base 1 is used to support the entire device. Furthermore, the tooling base 1 has a moving function, for example, a universal wheel with a braking function is provided at the bottom to adjust the position of the entire device.

[0034] The height of the two bearing seats 4 is adjusted by the two first lifting devices 2 so that the two elastic bending structures 5 carry the workpiece (the workpiece here is the rear axle, and the workpiece in the following text refers to the rear axle), and then the height of the bearing device 10 is adjusted by the third lifting device 9 to lift the swing frame and install it in coordination with the workpiece (rear axle). The swing frame is carried and lifted by the bearing device 10 so that the swing frame cooperates with the rear axle, and then the rear axle swing frame is welded to ensure the welding accuracy of the rear axle swing frame.

[0035] When the workpiece, i.e., the rear axle, is placed on the two elastic bending structures 5 through the equipment, the elastic bending structure 5 is bent and deformed by the pressure from the workpiece, so that the surrounding sides of the workpiece are squeezed by the elastic bending structure 5, thereby limiting the rolling of the workpiece along the elastic bending structure 5, avoiding the need to wait for the workpiece to be stationary and wasting time. The two ends of the elastic bending structure 5 can be directly pulled toward each other by the locking structure 8 until they are tightly against the outer wall of the workpiece, thereby completing the fixation of the workpiece and ensuring the stability of the workpiece when welding with the swing frame, thereby improving the welding efficiency. Subsequently, a welding gun is installed on the welding mechanism to weld the workpiece and the swing frame. During welding, the welding mechanism slides around the center of the tooling base 1 to weld different positions.

[0036] In this embodiment, the first lifting device 2, the second lifting device 3 and the third lifting device 9 are all existing technologies, such as hydraulic push rods, etc., the linear moving device 7 is also existing technology, such as a motor-driven screw to drive the locking structure 8 to move, etc., and the supporting device 10 is also existing technology, such as a plurality of seat bodies that fit the surface of the swing frame.

[0037] The welding mechanism is also prior art, for example, the same as the welding tooling in a fixing welding tooling for the swing frame of the rear axle of an underground scraper disclosed in patent publication number CN117697304B.

[0038] The elastic bending structure 5 includes a limit seat 501 fixedly arranged on the bearing seat 4, an arc groove 502 is opened on the top of the limit seat 501, and a plurality of mounting grooves 516 are sequentially opened along a horizontal straight line on the inner wall of the arc groove 502, and an elastic bearing member is arranged in each mounting groove 516, and each elastic bearing member includes a first elastic member 503 and two second elastic members 504, and the first elastic member 503 is located in the middle position of the bottom of the mounting groove 516 and can be elastically deformed in the vertical direction, and the two second elastic members 504 are symmetrical about the center of the first elastic member 503 and are obliquely arranged in the mounting groove 5 On the inner wall of 16, each elastic bearing member is provided with a bending bearing member 505 for bearing the workpiece, and the bending bearing member 505 is arc-shaped and can be bent, the bending bearing member 505 is fixedly connected to the top of the first elastic member 503, and the bending bearing member 505 is slidably connected to the top of the two second elastic members 504, and the corresponding two locking structures 8 respectively pull the two ends of the bending bearing member 505 to move toward each other to fix the workpiece, and a plurality of downward pressing fixing members 506 are also provided on the inner wall of the mounting groove 516, and the downward pressing fixing members 506 are used to limit the first elastic member 503 to the maximum deformation when fixing the workpiece.

[0039] When the elastic bending structure 5 is in use, the two ends of the workpiece are respectively placed on a plurality of bending bearing members 505 on two limit seats 501. Under the action of the gravity of the workpiece, the bending bearing member 505 bends and deforms, and squeezes the first elastic member 503 downward to deform, and at the same time squeezes the two second elastic members 504 to deform, and the bending bearing member 505 slides along the end of the second elastic member 504 to avoid interference between the bending bearing member 505 and the second elastic member 504 when bending and deforming.

[0040] Since the curved bearing member 505 is subjected to the elastic force of the second elastic members 504 on both sides thereof, the inner side wall of the curved bearing member 505 has a restrictive effect on the workpiece, thereby restricting the workpiece from rolling on the curved bearing member 505, avoiding the need to wait for the workpiece to be stationary and wasting a lot of time, thereby improving the welding efficiency. The first elastic member 503 and the second elastic member 504 can have a buffering effect on the workpiece, thereby avoiding collision damage to the workpiece when it is placed.

[0041] The downward pressing fixing member 506 is used to limit the first elastic member 503 to the maximum compression deformation, thereby limiting the first elastic member 503 from moving in the vertical direction after the workpiece is fixed, ensuring the stability of the workpiece during welding. When the workpiece is fixed, the second lifting device 3 can adjust the height so that the locking structure 8 moves in an inclined downward direction when pulling the bending bearing member 505, so that the bending bearing member 505 squeezes the first elastic member 503 to the maximum compression amount, so as to avoid the first elastic member 503 from moving up and down during the welding process, thereby ensuring the welding quality.

[0042] The installation groove 516 is provided to increase the installation space, reduce the space occupied by the elastic bearing member and the downward pressing fixing member 506 in the arc groove 502, and improve the utilization rate of the space.

[0043] In this embodiment, the first elastic member 503 is a conventional technology, such as a support spring and a support column are arranged inside the cylinder, and the support column is connected to the top of the support spring.

[0044] The curved bearing member 505 includes an arc-shaped base 507 fixedly arranged on the top of the first elastic member 503, and both sides of the arc-shaped base 507 are rotatably connected with arc-shaped side pressure plates 508 through torsion springs, and the arc-shaped outer walls of the arc-shaped side pressure plates 508 are slidably connected with the corresponding two second elastic members 504, and the top of each arc-shaped side pressure plate 508 is rotatably connected with an arc-shaped top pressure plate 509 through a torsion spring, and each arc-shaped top pressure plate 509 is provided with an avoidance groove 517, and the avoidance grooves 517 of the two opposite arc-shaped top pressure plates 509 are staggered with each other, and the arc-shaped base 507, the two arc-shaped side pressure plates 508 and the two arc-shaped top pressure plates 509 together constitute an arc-shaped plate body.

[0045] When the workpiece is placed on the arc base 507, the arc base 507 squeezes the first elastic member 503 and deforms under the action of the gravity of the workpiece, thereby driving the arc side pressure plates 508 on both sides to slide along the end of the second elastic member 504, so that the workpiece contacts the two arc side pressure plates 508, thereby squeezing the arc side pressure plates 508 to compress the second elastic member 504, so that the two arc side pressure plates 508 are subjected to the elastic force of the second elastic member 504, thereby applying pressure to the workpiece, thereby limiting the rolling of the workpiece through the two arc side pressure plates 508, and then the locking structure 8 pulls the two arc top pressure plates 509 to move toward each other until they are against the surface of the workpiece, and pulls the locking structure 8 downward through the second lifting device 3, thereby further driving the workpiece to squeeze the first elastic member 503 to the maximum compression amount, thereby ensuring the stability of the workpiece during welding.

[0046] The avoidance grooves 517 on the two arc-shaped top pressure plates 509 are used to avoid interference between the two arc-shaped top pressure plates 509 .

[0047] The arc-shaped side pressure plate 508 and the arc-shaped base 507 are connected by a torsion spring, and the arc-shaped side pressure plate 508 and the arc-shaped top pressure plate 509 are also connected by a torsion spring, so that the entire curved bearing member 505 can automatically reset under the elastic force of the torsion spring to carry the next workpiece, thereby improving the convenience of use.

[0048] The second elastic member 504 includes a fixed cylinder 510 obliquely arranged on the inner wall of the mounting groove 516, a sliding column 512 is slidably connected inside the fixed cylinder 510 via a spring 511, and the top of the sliding column 512 is slidably connected to the arc-shaped side pressure plate 508, and an electromagnet for adsorbing the sliding column 512 is arranged at the inner bottom of the fixed cylinder 510.

[0049] When the second elastic member 504 is pressed by the arc-shaped side pressure plate 508 , the sliding column 512 slides along the fixing tube 510 and presses the spring 511 to deform.

[0050] The electromagnet attracts the sliding column 512 , so that when the workpiece is placed, the sliding column 512 squeezes the spring 511 to deform, so that the distance between the two sliding columns 512 in the same installation groove 516 is maximized to avoid interference between the workpiece and the arc-shaped side pressure plate 508 .

[0051] The pressing fixing member 506 includes a linear driving device 513 arranged on the inner wall of the mounting groove 516, and the linear driving device 513 moves in the vertical direction. A hook plate 514 is arranged on the linear driving device 513. A plurality of pressing rings 515 are arranged at the bottom of the arc-shaped base 507, and the plurality of pressing rings 515 are symmetrical about the first elastic member 503. The hook plate 514 is inserted into the plurality of pressing rings 515.

[0052] The downward pressing fixing member 506 drives the hook plate 514 through the linear driving device 513 to drive the multiple downward pressing rings 515 to move downward synchronously, thereby driving the arc base 507 to move downward to further squeeze the first elastic member 503 to the maximum compression amount to ensure stability during welding.

[0053] The lower pressing ring 515 is in the shape of an elongated ring, so that the hook plate 514 has a certain movable space inside the lower pressing ring 515 to ensure that when the hook plate 514 is at the highest point, the first elastic member 503 can deform freely within a limited range to avoid interference between the lower pressing ring 515 and the hook plate 514 .

[0054] In this embodiment, the linear drive device 513 is a conventional technology, for example, the same as the linear moving device 7 .

[0055] The width of the arc base 507 is greater than the width of the mounting groove 516, and the minimum height of the first elastic member 503 is less than the depth of the mounting groove 516. The arc base 507 can be supported by the notch of the mounting groove 516, that is, the inner wall of the arc groove 502, so as to serve as the maximum compression amount of the first elastic member 503, and the arc base 507 is supported by the inner wall of the arc groove 502, thereby improving the stability of the arc base 507 during the welding process.

[0056] The locking structure 8 includes a moving seat 801 arranged on the linear moving device 7, and an extension plate 802 parallel to the horizontal plane is arranged on the side of the moving seat 801 facing the first lifting device 2. A plurality of hooks 803 are arranged on one side of the extension plate 802 through a torsion spring. The top of each arc-shaped top pressure plate 509 is rotatably connected to a fixing ring 804 through a torsion spring, and the fixing ring 804 is inclined upward along the horizontal plane.

[0057] The linear moving device 7 drives the moving seat 801 and the extension plate 802 to move until the hook 803 is inserted into the corresponding fixed ring 804. Through the continued driving of the linear moving device 7, the extension plate 802 drives the hook 803 to pull the fixed ring 804 toward the direction of another arc-shaped top pressure plate 509 until the arc-shaped top pressure plate 509 is against the surface of the workpiece.

[0058] The hook 803 and the fixing ring 804 are both magnetic, and after the fixing ring 804 is out of contact with the hook 803, the angle between the fixing ring 804 and the outer wall of the arc-shaped top pressure plate 509 is greater than zero, so that the hook 803 is fully in contact with the fixing ring 804 and remains stable, so that the hook 803 can be stably inserted into the fixing ring 804.

[0059] When the fixing ring 804 is not in contact with the draw hook 803 , the angle between the fixing ring 804 and the arc-shaped top pressure plate 509 is greater than zero, so that there is a certain buffer when the draw hook 803 is in contact with the fixing ring 804 .

[0060] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A fixing welding device for a rear axle swing frame of an underground scraper, comprising a tooling base (1), characterized in that: The tool base (1) is provided with two first lifting devices (2), four second lifting devices (3) and one third lifting device (9); each of the first lifting devices (2) is provided with a bearing seat (4); each of the bearing seats (4) is provided with an elastic bending structure (5) for bearing a workpiece; each of the second lifting devices (3) is provided with a fixed seat (6); each of the fixed seats (6) is provided with a linear moving device (7); each of the linear moving devices (7) is provided with a locking structure (8); the third lifting device (9) is provided with a bearing device (10) for bearing a swing frame, and the bearing device (10) is located between the two elastic bending structures (5); the tool base (1) is also provided with a welding mechanism for mounting a welding gun for welding, and the welding mechanism is capable of sliding around the center of the tool base (1); The elastic bending structure (5) is adapted to bend and deform in contact with the surface of the workpiece when carrying the workpiece, and can automatically return to an arc shape by elastic force after the workpiece is detached, and the locking structure (8) is used to hook one end of the elastic bending structure (5) and move it toward the other end to fix the workpiece, and when fixing the workpiece, the elastic bending structure (5) locks its maximum deformation state; The elastic bending structure (5) comprises a limit seat (501) fixedly arranged on the bearing seat (4); an arc-shaped groove (502) is provided on the top of the limit seat (501); a plurality of mounting grooves (516) are sequentially provided on the inner wall of the arc-shaped groove (502) along a horizontal straight line; an elastic bearing member is arranged in each mounting groove (516); each elastic bearing member comprises a first elastic member (503) and two second elastic members (504); the first elastic member (503) is located in the middle of the bottom of the mounting groove (516) and can be elastically deformed in the vertical direction; the two second elastic members (504) are symmetrical about the center of the first elastic member (503) and are obliquely arranged in the mounting groove. On the inner side wall of the mounting groove (516), each of the elastic bearing members is provided with a bending bearing member (505) for bearing a workpiece, and the bending bearing member (505) is arc-shaped and can be bent, the bending bearing member (505) is fixedly connected to the top of the first elastic member (503), and the bending bearing member (505) is slidably connected to the tops of the two second elastic members (504), and the corresponding two locking structures (8) respectively pull the two ends of the bending bearing member (505) to move towards each other to fix the workpiece, and a plurality of downward pressing fixing members (506) are also provided on the inner side wall of the mounting groove (516), and the downward pressing fixing members (506) are used to limit the first elastic member (503) to a maximum deformation when fixing the workpiece; The curved bearing member (505) comprises an arc-shaped base (507) fixedly arranged on the top of the first elastic member (503); both sides of the arc-shaped base (507) are rotatably connected to arc-shaped side pressure plates (508) via torsion springs; the arc-shaped outer walls of the arc-shaped side pressure plates (508) are slidably connected to the corresponding two second elastic members (504); the top of each arc-shaped side pressure plate (508) is rotatably connected to an arc-shaped top pressure plate (509) via a torsion spring; each arc-shaped top pressure plate (509) is provided with an avoidance groove (517); and the avoidance grooves (517) of two opposite arc-shaped top pressure plates (509) are offset from each other; the arc-shaped base (507), the two arc-shaped side pressure plates (508) and the two arc-shaped top pressure plates (509) together form an arc-shaped plate body.

2. The fixing welding device for the rear axle swing frame of an underground scraper according to claim 1 is characterized in that: The second elastic member (504) comprises a fixed cylinder (510) obliquely arranged on the inner wall of the mounting groove (516), a sliding column (512) being slidably connected in the fixed cylinder (510) via a spring (511), and the top of the sliding column (512) is slidably connected to the arc-shaped side pressure plate (508), and an electromagnet for adsorbing the sliding column (512) is arranged at the inner bottom of the fixed cylinder (510).

3. The fixing welding device for the rear axle swing frame of an underground scraper according to claim 1 is characterized in that: The pressing fixing member (506) comprises a linear drive device (513) arranged on the inner side wall of the mounting groove (516), and the linear drive device (513) moves in a vertical direction, a hook plate (514) is arranged on the linear drive device (513), a plurality of pressing rings (515) are arranged at the bottom of the arc-shaped base (507), and the plurality of pressing rings (515) are symmetrical about the first elastic member (503), and the hook plate (514) is inserted into the plurality of pressing rings (515).

4. The fixing welding device for the rear axle swing frame of an underground scraper according to claim 1 is characterized in that: The width of the arc-shaped base (507) is greater than the width of the mounting groove (516), and the minimum height of the first elastic member (503) is less than the depth of the mounting groove (516).

5. The fixing welding device for the rear axle swing frame of an underground scraper according to claim 1 is characterized in that: The locking structure (8) comprises a moving seat (801) arranged on the linear moving device (7); an extension plate (802) parallel to the horizontal plane is arranged on the side of the moving seat (801) facing the first lifting device (2); a plurality of draw hooks (803) are arranged on one side of the extension plate (802) via a torsion spring; the top of each arc-shaped top pressure plate (509) is rotatably connected to a fixing ring (804) via a torsion spring, and the fixing ring (804) is inclined upward along the horizontal plane.

6. The fixing welding device for the rear axle swing frame of an underground scraper according to claim 5 is characterized in that: The draw hook (803) and the fixing ring (804) are both magnetic, and after the fixing ring (804) is out of contact with the draw hook (803), the angle between the fixing ring (804) and the outer wall of the arc-shaped top pressure plate (509) is greater than zero degrees.

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