A welding, forming and fixing device for truck cross beams

Abstract

The present invention discloses a welding, forming and fixing device for truck cross beams, including a welding workpiece and two adjustment frames, the top surfaces of the two adjustment frames are both provided with a clamping mechanism, the clamping mechanism includes a clamping plate, connecting arms are fixedly connected between the middle sides of the upper end of the adjustment frame and the lower middle part of one side of the clamping plate, a telescopic mechanism is fixedly connected between the two adjustment frames, the telescopic mechanism includes a plurality of telescopic components and a plurality of second rotating shafts, and the telescopic component includes a first rotating shaft and two rotating arms. The pull rod of the present invention controls the length of the telescopic mechanism to adjust the distance between the two adjustment frames, fixes the two longitudinal beams on the two clamping plates, and then places the cross beam between the two longitudinal beams, then adjusts the position of the pull rod to fix the cross beam, adjusts the telescopic machine to different lengths, realizes the processing of cross beams of different specifications, reduces the cost of using tools, and can perform welding work on the cross beam.

Description

Technical Field

[0001] The invention relates to the technical field of truck manufacturing, in particular to a welding, forming and fixing device for a truck cross beam. Background Art

[0002] The frame is generally composed of longitudinal beams and cross beams. There are two main forms: side beam type and center beam type. The cross beam is used to ensure the torsional rigidity of the frame and bear the longitudinal load, and can also support the main components of the truck. The structural characteristics of the side beam frame are that it is easy to install the cab, carriage and some special equipment and arrange other assemblies, which is conducive to the modification of modified vehicles and the development of multi-variety vehicles. The cross beam is not only used to ensure the torsional rigidity of the frame and bear the longitudinal load, but also to support the main components of the car. Usually, trucks have five to six cross beams, sometimes more. The structural characteristics of the side beam frame are that it is easy to install the cab, carriage and some special equipment and arrange other assemblies, which is conducive to the modification of modified vehicles and the development of multi-variety vehicles, so it is widely used in trucks and most special vehicles.

[0003] In the prior art, for example, the Chinese patent number CN112404766A, "An automatic welding device for vehicle thermoformed floor beams", includes a support base plate and a support plate arranged on the support base plate and symmetrically distributed, an auxiliary moving mechanism for assisting the movement of the floor is arranged above the support plate, a welding gun head is arranged above the auxiliary moving mechanism, the welding gun head is connected to a welding body that controls it to perform welding, and the welding body is connected to a space moving mechanism that drives it to move in three directions perpendicular to each other. The present invention can quickly and accurately position the floor by setting a space moving mechanism and auxiliary movement, and then can accurately weld various points of the floor through the space moving mechanism, which is fast and convenient, and has a high degree of automation; this device can also reset the lifting support plate by setting a limit plate, without the need to manually control the movement of the first drive motor, which is convenient and has a high degree of automation.

[0004] However, in the prior art, trucks of different sizes have corresponding crossbeam specifications of different types. When producing truck crossbeams, multiple sets of fixing devices corresponding to the crossbeam specifications must be produced for installation and welding. Multiple sets of fixing devices not only increase production costs, but also take up a lot of space. At the same time, when welding processes are performed outdoors, the fixing devices are large in size and complex in structure, making it difficult to move them outdoors, which greatly limits the use scenarios of the fixing devices. Summary of the invention

[0005] The object of the present invention is to provide a welding, forming and fixing device for truck beams, so as to solve the problem that the specifications of the beams corresponding to trucks of different sizes are also different. When producing truck beams, multiple sets of fixing devices corresponding to the specifications of the beams must be produced for installation and welding. Multiple sets of fixing devices not only increase the production cost, but also take up a lot of space. At the same time, when the welding process is carried out outdoors, due to the large size and complex structure of the fixing device, it is difficult to move it outdoors, which greatly limits the problem of the use scenarios of the fixing device.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding, forming and fixing device for a truck cross beam, comprising a welding workpiece and two adjusting frames, the top surfaces of the two adjusting frames are both provided with a clamping mechanism, the clamping mechanism comprises a clamping plate, connecting arms are fixedly connected between the middle sides of the upper end of the adjusting frame and the lower middle part of one side of the clamping plate, and a telescopic mechanism is fixedly connected between the two adjusting frames;

[0007] The telescopic mechanism includes multiple telescopic components and multiple second rotating shafts, the telescopic components include a first rotating shaft and two rotating arms, the two ends of the first rotating shaft are respectively rotatably connected to the center positions of the two rotating arms, the two ends of the rotating arms are provided with rotating holes, the rotating arms of the two telescopic mechanisms are rotatably connected through the second rotating shafts at corresponding positions, the sides of the two adjustment frames are provided with rectangular slide grooves, the inner side walls of the two adjustment frames are fixedly connected with positioning blocks, the interiors of the rectangular slide grooves are slidably clamped with pull rods, the pull rods are fixedly connected with sliding blocks to the adjacent rotating arms, and the positioning blocks are fixedly connected to the adjacent rotating arms.

[0008] Preferably, two traction mechanisms are arranged between the two clamping plates, and the traction mechanisms include two lifting rods, adjacent sides of the lifting rods are fixedly connected with shrinkable outer tubes, the insides of the shrinkable outer tubes are slidably connected with shrinkable inner rods, and a fixed rod is fixedly connected between the two shrinkable inner rods.

[0009] Preferably, an L-shaped slot is provided in the upper middle portion of one side of the clamping plate, an L-shaped slider is fixedly connected to the upper middle portion of one side of the lifting rod, the L-shaped slider is slidably engaged with the L-shaped slot, and a handle is fixedly connected to the outer side of the lifting rod.

[0010] Preferably, a fixing mechanism is provided between the two telescopic fixing rods, and the fixing mechanism comprises a first fixing component and a second fixing component.

[0011] Preferably, the first fixing assembly includes a first fixing plate, the second fixing assembly includes a second fixing plate, and the first fixing plate and the second fixing plate are both fixedly connected to the fixing rod.

[0012] Preferably, an L-shaped rod is fixedly connected to the upper middle portion of one side of the first fixing plate, and an opening is provided at the upper middle portion of one side of the second fixing plate.

[0013] Preferably, a baffle is fixedly connected to the upper middle portion of one side of the second fixed plate, an arc-shaped slider is slidably connected inside the baffle, and a spring is fixedly connected between the arc-shaped slider and the inner wall of the opening of the second fixed plate.

[0014] Preferably, the length of the shrinkable outer tube is equal to the length of the shrinkable inner rod, the inner diameter of the shrinkable outer tube is 1.2 times the outer diameter of the shrinkable inner rod, the adjacent ends of the shrinkable outer tube and the shrinkable inner rod are fixedly connected with a limiting plate, and the inner diameter of the shrinkable outer tube is equal to the outer diameter of the limiting plate.

[0015] Preferably, the surface of the spring is coated with a rust inhibitor, and the inside of the L-shaped slide groove and the rectangular slide groove are coated with a lubricant.

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

[0017] 1. In the present invention, the distance between the two adjustment frames is adjusted by controlling the length of the telescopic mechanism through the pull rod, the two longitudinal beams are fixed on the two clamping plates, and then the crossbeam is placed between the two longitudinal beams. Then, the position of the pull rod is adjusted to fix the crossbeam, and the different lengths of the telescopic machine are adjusted, so that the processing of crossbeams of different specifications is realized, and the cost of using tools is reduced, and the welding work of the crossbeam can be carried out.

[0018] 2. In the present invention, when the device needs to be moved, the adjustment frames on both sides are merged by pulling the pull rod, and the inner rod is retracted to slide inside the outer tube, thereby reducing the length of the traction mechanism, making the volume of the entire device smaller and convenient to move.

[0019] 3. In the present invention, by pulling the handle to make the traction mechanism slide to both sides of the beam, the L-shaped rod is pressed against the arc-shaped slider and the spring is compressed, the arc-shaped slider and the L-shaped rod are engaged with each other, and the handle is lifted up, the arc-shaped slider slides to the upper side of the L-shaped rod, and the arc-shaped slider and the L-shaped rod are no longer engaged, and the L-shaped rod is detached from the opening, thereby achieving the fixation of the beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a device for welding, forming and fixing a truck beam according to the present invention;

[0021] Figure 2 This is a schematic diagram of the telescopic mechanism structure of a truck beam welding and forming fixing device of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a telescopic component used in a truck beam welding, forming and fixing device of the present invention;

[0023] Figure 4 It is a front view of a traction mechanism for a truck beam welding and forming fixing device of the present invention;

[0024] Figure 5 This is an exploded rendering of a clamping mechanism and a traction mechanism for a truck beam welding and forming fixing device of the present invention;

[0025] Figure 6 A cross-sectional view of the connection relationship between a shrinkable outer tube and a shrinkable inner rod of a truck beam welding forming and fixing device of the present invention;

[0026] Figure 7 It is a cross-sectional schematic diagram of a fixing mechanism of a truck cross beam welding and forming fixing device of the present invention;

[0027] Figure 8 The present invention is a schematic diagram of the internal structure of a fixing mechanism of a truck cross beam welding and forming fixing device.

[0028] In the figure:

[0029] 1. Adjusting frame; 2. Clamping mechanism; 21. Clamping plate; 22. Connecting arm; 23. L-shaped slide; 3. Telescopic mechanism; 31. Telescopic assembly; 311. Rotating arm; 312. First rotating axis; 32. Second rotating axis; 33. Positioning block; 34. Sliding block; 35. Rectangular slide; 36. Pull rod; 4. Traction mechanism; 41. Lifting rod; 42. L-shaped slider; 43. Handle; 44. Retractable outer tube; 45. Retractable inner rod; 46. Fixed rod; 5. Welding workpiece; 6. Fixing mechanism; 61. First fixing assembly; 611. First fixing plate; 612. L-shaped rod; 62. Second fixing assembly; 621. Second fixing plate; 622. Arc-shaped slider; 623. Spring; 624. Baffle. 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 implementation regulations described 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] Reference Figure 1-8As shown: A welding and forming fixing device for truck cross beams, comprising a welding workpiece 5 and two adjusting frames 1, the top surfaces of the two adjusting frames 1 are both provided with a clamping mechanism 2, the clamping mechanism 2 comprises a clamping plate 21, connecting arms 22 are fixedly connected between the middle sides of the upper end of the adjusting frame 1 and the middle lower part of one side of the clamping plate 21, a telescopic mechanism 3 is fixedly connected between the two adjusting frames 1, the telescopic mechanism 3 comprises a plurality of telescopic components 31 and a plurality of second rotating shafts 32, the telescopic components 31 comprises a first rotating shaft 312 and two rotating arms 311, the two ends of the first rotating shaft 312 are respectively rotatably connected to the center positions of the two rotating arms 311, and the two ends of the rotating arms 311 are A rotating hole is provided, and the rotating arms 311 of the two telescopic mechanisms 3 are rotatably connected through the second rotating shaft 32 at the corresponding position. A rectangular slide groove 35 is provided on the side of the two adjustment frames 1, and the inner side walls of the two adjustment frames 1 are fixedly connected with a positioning block 33. The inside of the rectangular slide groove 35 is slidably connected with a pull rod 36, and a sliding block 34 is fixedly connected between the pull rod 36 and the adjacent rotating arm 311, and the positioning block 33 is fixedly connected to the adjacent rotating arm 311; when it is necessary to fix the welding workpiece 5, first slide the pull rod 36 from the other end of the rectangular slide groove 35 to the positioning block 33, and the pull rod 36 drives the sliding block 34 to move and connect with the sliding block 34 The connected rotating arms 311 move accordingly. Since the two staggered rotating arms 311 are rotationally connected via the first rotating shaft 312, the outer ends of the two rotating arms 311 approach each other, and the length of the entire telescopic assembly 31 becomes longer. The two telescopic assemblies 31 are also rotationally connected via the second rotating shaft 32. Therefore, the movements of the various telescopic assemblies 31 of the entire telescopic mechanism 3 are interrelated, so that the length of the entire telescopic mechanism 3 is also longer, and the distance between the two adjustment frames 1 is also increased accordingly. The two longitudinal beams are fixed on the clamping plates 21 of the adjustment frames 1 on both sides. Specifically, threaded holes are provided on the sides of the clamping plates 21, and fastening screws are installed at the welding joints of the longitudinal beams and the cross beams to complete the clamping. The plate 21 can fix the corresponding longitudinal beam, and then place the crossbeam between the two longitudinal beams, and then adjust the position of the pull rod 36 to make the length of the entire telescopic mechanism 3 consistent with the length of the crossbeam, and the crossbeam is fixed on the longitudinal beam. The two clamping plates 21 generate an extrusion force on the entire welding workpiece 5, and the welding work on the crossbeam can be carried out. When welding welding workpieces 5 of different specifications, it is only necessary to pull the pull rod 36 again, place another welding workpiece 5 between the two clamping plates 21, and adjust the pull rod 36 again to clamp the clamping plate 21 to the welding workpiece 5. When the equipment needs to be moved, pull the pull rod 36 to merge the adjustment frames 1 on both sides, so that the volume of the entire equipment becomes smaller and it is convenient to move.

[0032] according to Figure 4 , Figure 6As shown, two traction mechanisms 4 are arranged between the two clamping plates 21, and the traction mechanism 4 includes two lifting rods 41, and the adjacent sides of the lifting rods 41 are fixedly connected with a retractable outer tube 44, and the inside of the retractable outer tube 44 is slidably connected with a retractable inner rod 45, and a fixed rod 46 is fixedly connected between the two retractable inner rods 45. When the length of the telescopic mechanism 3 is adjusted, the traction mechanism 4 at the top part of the entire device also moves accordingly. When the telescopic mechanism 3 becomes longer, the retractable inner rod 45 inside the retractable outer tube 44 slides outwardly. When the telescopic mechanism 3 becomes shorter, the retractable inner rod 45 outside the retractable outer tube 44 slides toward the inside of the retractable outer tube 44, so that the total length of the entire traction mechanism 4 is always synchronized with the length of the telescopic mechanism 3.

[0033] according to Figure 5 As shown, an L-shaped slot 23 is provided at the upper middle portion of one side of the clamping plate 21, an L-shaped slider 42 is fixedly connected to the upper middle portion of one side of the lifting rod 41, the L-shaped slider 42 is slidably engaged with the L-shaped slot 23, and a handle 43 is fixedly connected to the outer side of the lifting rod 41. By pulling the handle 43 on the outer side of the lifting rod 41, the L-shaped slider 42 slides horizontally along the L-shaped slot 23, so that the entire traction mechanism 4 can be positioned at any position of the clamping plate 21, and at the same time, pulling the handle 43 upwards can make the lifting rod 41 move upward, thereby increasing the height of the entire traction mechanism 4.

[0034] according to Figure 7 As shown, a fixing mechanism 6 is provided between the two telescopic fixing rods 46, and the fixing mechanism 6 includes a first fixing component 61 and a second fixing component 62. When in use, the two traction mechanisms 4 need to align and position and fix the welded beam, and the first fixing component 61 and the second fixing component 62 are respectively clamped on both sides of the beam to keep the beam in a vertical state to prevent the beam from falling sideways and affecting the welding effect.

[0035] according to Figure 7 , Figure 8 As shown, the first fixing assembly 61 includes a first fixing plate 611, and the second fixing assembly 62 includes a second fixing plate 621. The first fixing plate 611 and the second fixing plate 621 are both fixedly connected to the fixing rod 46. The fixing rods 46 on the two traction mechanisms 4 are respectively connected to the first fixing plate 611 and the second fixing plate 621, and the entire first fixing plate 611 and the second fixing plate 621 jointly produce the function of the fixing mechanism 6.

[0036] according to Figure 7 , Figure 8 As shown, an L-shaped rod 612 is fixedly connected to the upper middle portion of one side of the first fixing plate 611, and an opening is provided at the upper middle portion of one side of the second fixing plate 621. When the first fixing plate 611 approaches the second fixing plate 621, the L-shaped rod 612 on the first fixing plate 611 enters the opening of the second fixing plate 621.

[0037] according to Figure 7 As shown, a baffle plate 624 is fixedly connected to the upper middle part of one side of the second fixed plate 621, and an arc-shaped slider 622 is slidably connected inside the baffle plate 624. A spring 623 is fixedly connected between the arc-shaped slider 622 and the inner wall of the opening of the second fixed plate 621. When the first fixed plate 611 is slid toward the second fixed plate 621, the L-shaped rod 612 moves toward the arc-shaped slider 622 and squeezes close to it. The arc-shaped slider 622 is compressed by the pressure to compress the spring 623. At the same time, the L-shaped rod 612 moves deeper into the opening, and the corner position of the L-shaped rod 612 moves to the arc-shaped slider 622. The arc-shaped slider 622 is no longer compressed, and the spring 623 and the arc-shaped slider 623 are compressed. The slider 622 returns to its initial state, so that the arc-shaped slider 622 and the L-shaped rod 612 are mutually engaged, thereby realizing the fixation of the first fixing plate 611 and the second fixing plate 621 to the crossbeam. When the fixation needs to be cancelled, the handle 43 connected to the second fixing plate 621 is lifted upward, so that the lifting rod 41 drives the second fixing plate 621 to move upward, and the arc-shaped slider 622 of the second fixing plate 621 slides to the upper side of the L-shaped rod 612, and the arc-shaped slider 622 and the L-shaped rod 612 are no longer engaged. At this time, the L-shaped rod 612 is detached from the opening, and the first fixing component 61 and the second fixing component 62 no longer clamp the crossbeam.

[0038] according to Figure 6 As shown, the length of the shrinkable outer tube 44 is equal to the length of the shrinkable inner rod 45, the inner diameter of the shrinkable outer tube 44 is 1.2 times the outer diameter of the shrinkable inner rod 45, the adjacent ends of the shrinkable outer tube 44 and the shrinkable inner rod 45 are fixedly connected with a limiting plate, and the inner diameter of the shrinkable outer tube 44 is equal to the outer diameter of the limiting plate, so that the shrinkable inner rod 45 can slide inside the shrinkable outer tube 44 without detaching.

[0039] according to Figure 5 , Figure 7 As shown, the surface of the spring 623 is coated with a rust preventive, and the inside of the L-shaped slide groove 23 and the rectangular slide groove 35 are coated with a lubricant, which increases the service life of the spring 623 and makes it easier to pull the pull rod 36 and move the handle 43.

[0040] The method of use and working principle of the device are as follows: the pull rod 36 is slid from the other end of the rectangular slide groove 35 to the positioning block 33, the pull rod 36 drives the sliding block 34 to move, and the rotating arm 311 connected to the sliding block 34 moves accordingly. Since the two staggered rotating arms 311 are rotationally connected through the first rotating shaft 312, the outer ends of the two rotating arms 311 are close to each other, and the length of the entire telescopic assembly 31 becomes longer. The two telescopic assemblies 31 are also rotationally connected through the second rotating shaft 32, so the movements of the various telescopic assemblies 31 of the entire telescopic mechanism 3 are interrelated, so that The length of the entire telescopic mechanism 3 is also increased, and the distance between the two adjustment frames 1 is also increased. At the same time, the traction mechanism 4 also moves accordingly, and the two longitudinal beams are fixed on the clamping plates 21 of the adjustment frames 1 on both sides, and then the crossbeam is placed between the two longitudinal beams. Then the position of the pull rod 36 is adjusted to make the length of the entire telescopic mechanism 3 consistent with the length of the crossbeam, and the handle 43 is pulled to make the L-shaped slider 42 slide horizontally along the L-shaped slide groove 23, and the first fixing component 61 and the second fixing component 62 are controlled to be clamped on both sides of the crossbeam respectively, and the first fixing plate 611 is moved closer to the second fixing plate 621. The L-shaped rod 612 moves toward the arc slider 622 and is squeezed close to it. The arc slider 622 is compressed by the pressure to compress the spring 623. At the same time, the L-shaped rod 612 moves deeper into the opening. The corner position of the L-shaped rod 612 moves to the arc slider 622. The arc slider 622 is no longer compressed. The spring 623 and the arc slider 622 return to their initial state, so that the arc slider 622 and the L-shaped rod 612 are mutually engaged, thereby realizing the fixation of the first fixing plate 611 and the second fixing plate 621 to the crossbeam. When the fixation needs to be cancelled, the handle 43 connected to the second fixing plate 621 is lifted upward, so that the lifting rod 41 drives the second fixing plate 621 to move upward, and the second fixing plate 611 is fixed to the crossbeam. The arc-shaped slider 622 of the fixed plate 621 slides to the upper side of the L-shaped rod 612, and the arc-shaped slider 622 is no longer engaged with the L-shaped rod 612. At this time, the L-shaped rod 612 is disengaged from the opening, and the first fixing assembly 61 and the second fixing assembly 62 no longer clamp the beam. At this time, the beam can be welded. When welding welding workpieces 5 of different specifications, it is only necessary to pull the pull rod 36 again, place another welding workpiece 5 between the two clamping plates 21, and adjust the pull rod 36 again to clamp the clamping plates 21 to the welding workpiece 5. When the equipment needs to be moved, pull the pull rod 36 to merge the adjustment frames 1 on both sides, so that the volume of the entire equipment becomes smaller and it is convenient to move.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding and forming fixing device for a truck cross beam, comprising a welding workpiece (5) and two adjustment frames (1), characterized in that: The top surfaces of the two adjustment frames (1) are each provided with a clamping mechanism (2), the clamping mechanism (2) comprising a clamping plate (21), connecting arms (22) are fixedly connected between the middle sides of the upper end of the adjustment frame (1) and the lower middle part of one side of the clamping plate (21), two connecting arms (22) are fixedly connected between the clamping plate (21) and the adjustment frame (1) at the corresponding position, and a telescopic mechanism (3) is fixedly connected between the two adjustment frames (1); The telescopic mechanism (3) comprises a plurality of telescopic components (31) and a plurality of second rotating shafts (32). The telescopic components (31) comprise a first rotating shaft (312) and two rotating arms (311). The two ends of the first rotating shaft (312) are respectively rotatably connected to the center positions of the two rotating arms (311). The two ends of the rotating arms (311) are provided with rotating holes. The rotating arms (311) of two adjacent telescopic components are rotatably connected via the second rotating shafts (32) at corresponding positions. The sides of the two adjustment frames (1) are provided with rectangular sliding grooves (35). The inner side walls of the two adjustment frames (1) are fixedly connected with positioning blocks (33). The interiors of the rectangular sliding grooves (35) are slidably connected with pull rods (36). The pull rods (36) are fixedly connected with sliding blocks (34) with the adjacent rotating arms (311). The positioning blocks (33) are fixedly connected with the adjacent rotating arms (311). Two traction mechanisms (4) are arranged between the two clamping plates (21), and the traction mechanism (4) comprises two lifting rods (41), and adjacent sides of the lifting rods (41) are fixedly connected with a shrinking outer tube (44), and the shrinking outer tubes (44) are slidably connected with shrinking inner rods (45), and a fixing rod (46) is fixedly connected between the two shrinking inner rods (45); an L-shaped sliding groove (23) is opened at the upper middle part of one side of the clamping plate (21), and an L-shaped sliding block (42) is fixedly connected at the upper middle part of one side of the lifting rod (41), and the L-shaped sliding block (42) is slidably engaged with the L-shaped sliding groove (23), and the outer side of the lifting rod (41) is fixedly connected with a handle (43); a fixing mechanism (6) is arranged between the two fixing rods (46), and the fixing mechanism (6) comprises a first A fixing assembly (61) and a second fixing assembly (62); the first fixing assembly (61) comprises a first fixing plate (611), the second fixing assembly (62) comprises a second fixing plate (621), the first fixing plate (611) and the second fixing plate (621) are respectively fixedly connected to two fixing rods (46); an L-shaped rod (612) is fixedly connected to the upper middle portion of one side of the first fixing plate (611), and an opening is provided at the upper middle portion of one side of the second fixing plate (621); a baffle plate (624) is fixedly connected to the upper middle portion of one side of the second fixing plate (621), an arc-shaped sliding block (622) is slidably connected inside the baffle plate (624), and a spring (623) is fixedly connected between the arc-shaped sliding block (622) and the inner wall of the opening of the second fixing plate (621).

2. The welding, forming and fixing equipment for truck cross beams according to claim 1 is characterized in that: The length of the shrinkable outer tube (44) is equal to the length of the shrinkable inner rod (45), and the inner diameter of the shrinkable outer tube (44) is 1.2 times the outer diameter of the shrinkable inner rod (45).

3. The welding, forming and fixing equipment for truck beams according to claim 1, characterized in that: The surface of the spring (623) is coated with a rust preventive agent, and the insides of the L-shaped slide groove (23) and the rectangular slide groove (35) are coated with a lubricant.

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