A bending device for the carriage plate of a semi-trailer

Abstract

The present invention discloses a bending device for the sheet material of a semi-trailer carriage, which relates to the field of steel plate bending processing. The device includes a frame, on which a plurality of tile pressing components and adjusting components are arranged in an array. The tile pressing component includes an upper roller shaft and a lower roller shaft, an upper pressing wheel mounted on the upper roller shaft, and a lower pressing wheel mounted on the lower roller shaft. The adjusting component includes a supporting roller arranged above and / or below the tile pressing component. A supporting seat is sleeved on the supporting roller, and a U-shaped locking block is slidably connected to one end of the supporting seat. Both ends of the U-shaped locking block are rotatably connected to both ends of the upper pressing wheel or the lower pressing wheel. In this semi-trailer carriage sheet material bending device, through the arrangement of the supporting roller and the U-shaped locking block, the pressing wheel can still be independently fixed on the supporting seat after being separated from the air shaft. When replacing a single pressing wheel, only the corresponding U-shaped locking block needs to be unlocked and the damaged pressing wheel removed, without disassembling adjacent components or the whole roller shaft, thus greatly shortening the maintenance time and reducing the losses caused by shutdown.

Description

Technical Field

[0001] The present invention relates to the technology of steel plate bending processing, and specifically relates to a bending device for the plates of a semi-trailer carriage. Background Art

[0002] As the core load-bearing structure of road transportation, the side plates, top plates and other large plates of a semi-trailer carriage need to meet the process requirements of high strength, light weight and complex curved surface forming. Traditional carriage plates mostly adopt a corrugated structure, and reinforcing ribs are formed through periodic bending to improve the bending stiffness and impact resistance. In the field of steel plate bending processing, although many solutions have been proposed in the prior art, there are still certain defects. For example, the Chinese invention patent with the publication number CN112045018A discloses a tile press for producing multi-type color steel tiles, which adjusts the distance between the pressing wheels through an adjusting component to adapt to the production of plates of different types. Another example is the galvanized steel plate forming roller equipment disclosed in the publication number CN110788185A. When replacing a single pressing wheel, it is necessary to disassemble the adjacent pressing wheels and transmission components. Especially in the batch production of carriage plates, the pressing wheels are prone to wear due to long-term high-pressure contact. However, the existing pressing wheel replacement requires the overall disassembly of the roller group, which is cumbersome and time-consuming, affecting the production continuity. Summary of the Invention

[0003] The purpose of the present invention is to provide a bending device for the plates of a semi-trailer carriage to solve the above-mentioned deficiencies in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A bending device for the plates of a semi-trailer carriage, including a frame, on which a plurality of tile pressing components and adjusting components are arranged in an array. The tile pressing component includes an upper roller shaft and a lower roller shaft, an upper pressing wheel installed on the upper roller shaft, and a lower pressing wheel installed on the lower roller shaft. The adjusting component includes a support roller arranged above and / or below the tile pressing component. A support seat is sleeved on the support roller. One end of the support seat is slidably connected with a U-shaped locking block, and both ends of the U-shaped locking block are rotatably connected with both ends of the upper pressing wheel or the lower pressing wheel. A locking member is installed on one side of the support seat, and the locking member is used to restrict the axial movement and circumferential rotation of the support seat along the support roller.

[0005] Further, the upper roller shaft and the lower roller shaft are air shaft. When the air shaft is in a tightened state, it is used to restrict the movement of the upper pressing wheel and the lower pressing wheel. When the air shaft is in a contracted state, the restriction on the upper pressing wheel and the lower pressing wheel is released.

[0006] Further, the tile pressing component further includes two vertical frames installed on the frame. A lower roller seat and an upper roller seat are installed on the vertical frames. The upper roller seat is connected with a lifting member, and the lifting member is used to drive the upper roller seat to move vertically to adjust the distance between the upper pressing wheel and the lower pressing wheel.

[0007] Further, the support roller is fixedly installed on one side of the vertical frame. The axial direction of the support roller is parallel to the axial direction of the upper roller shaft or the lower roller shaft. Two guide columns are fixedly connected to the top of the U-shaped locking block, and the guide columns are slidably connected to the inner wall of the support seat.

[0008] Further, a limiting chute is axially provided on the support roller. The locking member includes a lock block and a bolt. The lock block is slidably connected to the inner wall of the support roller. The bolt is threadedly connected to the inner wall of the lock block, and the bolt is slidably connected to the limiting chute.

[0009] Further, an arc-shaped groove is penetrated and provided on the support seat, and the arc-shaped groove is slidably connected to the bolt.

[0010] Further, a deviation prevention mechanism is provided on one side of the frame in the direction of the plate input. The deviation prevention mechanism includes two brackets installed on the frame. A slide bar is installed between the two brackets. Two sliders are slidably connected to the slide bar. A limiting plate is fixedly installed on the slider, and a limiting groove is provided on the opposite side of the limiting plate.

[0011] Further, the deviation prevention mechanism further includes a bidirectional lead screw. The middle of the bidirectional lead screw is rotatably connected to an L-shaped frame. The two ends of the bidirectional lead screw are respectively threadedly connected to the inner walls of the two sliders. A spring is sleeved between the slider and the L-shaped frame, and the two ends of the spring are respectively fixedly connected to the L-shaped frame and the slider.

[0012] Further, the deviation prevention mechanism can move along the direction of the plate conveying.

[0013] Further, the distance between the upper pressing wheel and the lower pressing wheel arranged along the direction of the plate conveying gradually decreases.

[0014] Compared with the prior art, a bending device for the semi-trailer carriage plate provided by the present invention has the following beneficial effects:

[0015] 1. In the bending device for the semi-trailer carriage plate, through the arrangement of the support roller and the U-shaped locking block, the pressing wheel can still be independently fixed on the support seat after being separated from the air shaft. When replacing a single pressing wheel, only the corresponding U-shaped locking block needs to be unlocked and the damaged pressing wheel removed, without disassembling adjacent components or the whole roller shaft, greatly shortening the maintenance time and reducing the loss caused by shutdown.

[0016] 2. In the bending device for the semi-trailer carriage plate, the pressing wheel is fixed by means of an air shaft, realizing the locking of the pressing wheel position in the inflated state and allowing the pressing wheel to be freely adjusted in the contracted state. Combining the axial sliding and circumferential rotation functions of the support roller, the distance, angle and arrangement mode of the pressing wheels can be quickly adjusted to meet the requirements of different thicknesses, materials and bending shapes.

[0017] 3. The bending device for the semi-trailer carriage plate can move the pressing wheel above the roller shaft by setting a rotatable support base, temporarily disable specific pressing wheels or switch to spare pressing wheels, so as to achieve local non-bending or special-shaped processing (such as straight in the middle and corrugated pressing on both sides), expanding the application scenarios of the equipment. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0019] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the structure of the corrugating component and the adjusting component provided by the embodiment of the present invention;

[0021] Figure 3 Provided by the embodiment of the present invention Figure 2 Schematic diagram of the back structure;

[0022] Figure 4 Schematic diagram of the anti-deviation mechanism structure provided by the embodiment of the present invention;

[0023] Figure 5 Provided by the embodiment of the present invention Figure 2 Schematic diagram of the state where one of the upper pressing wheels rotates to the upper side;

[0024] Figure 6 Schematic diagram of the plate forming after one of the upper pressing wheels (concave shape) rotates to the upper side provided by the embodiment of the present invention;

[0025] Figure 7 Schematic diagram of the plate forming after one of the upper pressing wheels (convex shape) rotates to the upper side provided by the embodiment of the present invention;

[0026] Figure 8 Schematic diagram of the adjusting components provided above and below the corrugating component in the embodiment of the present invention;

[0027] Figure 9 Schematic diagram when the number of pressing wheels gradually increases symmetrically from the middle of one side in the embodiment of the present invention.

[0028] Explanation of the reference numerals:

[0029] Tile pressing assembly; 11. Upper roller shaft; 12. Lower roller shaft; 13. Upper pressing wheel; 14. Lower pressing wheel; 15. Vertical frame; 16. Upper roller seat; 17. Lower roller seat; 2. Adjusting assembly; 21. Support roller; 22. Support seat; 23. U-shaped locking block; 24. Locking member; 241. Locking block; 242. Bolt; 243. Limit chute; 244. Arc-shaped groove; 25. Guide post; 3. Lifting member; 4. Anti-deviation mechanism; 41. Bracket; 42. Slide bar; 43. Slide table; 44. Limit plate; 45. Limit groove; 46. Bi-directional lead screw; 47. L-shaped frame; 48. Spring

[0030] 100. Frame

[0031] 200. Cutting assembly Specific embodiments

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings

[0033] Example, please refer to Figures 1-9 , a semi-trailer carriage plate bending device, including a frame 100, on which a tile pressing assembly 1 for plate forming is installed. The tile pressing assembly 1 includes an upper roller shaft 11 and a lower roller shaft 12, as well as an upper pressing wheel 13 installed on the upper roller shaft 11 and a lower pressing wheel 14 installed on the lower roller shaft 12. One of the upper pressing wheel 13 and the lower pressing wheel 14 is concave and the other is convex, so as to present a state that can cooperate with each other. When the plate passes between the upper pressing wheel 13 and the lower pressing wheel 14, the plate is extruded and bent into a tile-shaped plate with the required shape and size for the side structure in the semi-trailer carriage, such as Figure 7 the plate forming state shown

[0034] It should be noted that the number of upper pressing wheels 13 installed on the same upper roller shaft 11 is determined by the number of corrugated parts required for the plate to be formed. There is no specific upper and lower position limit for the upper pressing wheel 13 and the lower pressing wheel 14 Figure 2 In [reference], the concave upper pressing wheel 13 is taken as an example. In actual use, it can also be installed below for plate processing. In order to facilitate observing the forming state and quality, it is preferred that the upper pressing wheel 13 is concave

[0035] The semi-trailer carriage plate bending device further includes an adjusting assembly 2, as shown in Figure 2As shown in the figure, the adjusting assembly 2 includes a support roller 21 mounted above the tile pressing assembly 1. A support seat 22 is sleeved on the support roller 21. One end of the support seat 22 is slidably connected with a U-shaped locking block 23. Both ends of the U-shaped locking block 23 are rotatably connected with both ends of the upper pressing wheel 13 or the lower pressing wheel 14. A locking member 24 is installed on one side of the support seat 22. The locking member 24 is used to restrict the axial movement and circumferential rotation of the support seat 22 along the support roller 21.

[0036] The provision of the support roller 21 enables each upper pressing wheel 13 to be positionally restricted by the U-shaped locking block 23 on the support roller 21 after being disengaged from the limiting effect of the upper roller shaft 11. That is to say, when the upper pressing wheel 13 is not installed on the upper roller shaft 11, it can still be restricted by the adjusting assembly 2, playing an auxiliary supporting role. When some of the upper pressing wheels 13 are damaged and need to be replaced, in the prior art, the upper roller shaft 11 and each upper pressing wheel 13 thereon need to be taken out from the frame 100. And when replacing the damaged upper pressing wheel 13 after taking them out, it is also necessary to remove all the upper pressing wheels 13 on the adjacent side in order to remove it from the upper roller shaft 11. However, in this solution, only the upper roller shaft 11 needs to be taken out, and then each upper pressing wheel 13 originally installed on the upper roller shaft 11 will be hung on the support roller 21, and each upper pressing wheel 13 will be independently fixed by the U-shaped locking block 23. When any one of the upper pressing wheels 13 is damaged and needs to be replaced, only the damaged upper pressing wheel 13 needs to be taken out from the U-shaped locking block 23 for replacement, without the need to remove other upper pressing wheels 13, simplifying the maintenance process and improving work efficiency.

[0037] In addition, the provision of the locking member 24 stabilizes the position of the support seat 22 on the support roller 21, preventing the upper pressing wheel 13 from shifting during processing, so that the initial position can be maintained before and after the replacement of the upper pressing wheel 13. After the replacement, production can be resumed only by reinstalling the upper roller shaft 11. At the same time, when the locking member 24 is in the unlocked state, the support seat 22 is allowed to move flexibly on the support roller 21, facilitating the adjustment of the positions of the upper pressing wheels 13. In some scenarios where the position or spacing of the corrugations needs to be adjusted, the position of the upper pressing wheel 13 can be adjusted by the position of the support seat 22. However, for the adjustment of the position of the upper pressing wheel 13, the lower pressing wheel 14 also needs to be adjusted synchronously so that the upper pressing wheel 13 and the lower pressing wheel 14 are in a relative position. Therefore, in some embodiments, the lower pressing wheel 14 is also equipped with a corresponding adjusting mechanism, such as Figure 8 As shown in the figure, so as to achieve the coordination and consistency of the upper and lower pressing wheels 14, that is, the support roller 21 is mounted above and / or below the tile pressing assembly 1. Through this design, not only the flexibility and adaptability of the equipment are improved, but also the stability and reliability in the production process are further optimized.

[0038] In one embodiment of the present invention, the upper roller shaft 11 and the lower roller shaft 12 are air expandable shafts. When the air expandable shafts are in the expanded state, they are used to restrict the movement of the upper pressure wheel 13 and the lower pressure wheel 14. When the air expandable shafts are in the contracted state, the restriction on the upper pressure wheel 13 and the lower pressure wheel 14 is released. The air expandable shafts can be of the slat type, the key type or the through type, and are selected according to actual requirements so as to effectively control the upper pressure wheel 13 and the lower pressure wheel 14 under different working conditions. The setting of the air expandable shafts makes the fixing and releasing of the upper pressure wheel 13 and the lower pressure wheel 14 more convenient, improves the flexibility of equipment operation. At the same time, the design of the air expandable shafts also reduces the mechanical wear caused by frequent disassembly and assembly, extends the service life of the equipment, and reduces the maintenance cost.

[0039] In one embodiment of the present invention, the tile pressing assembly 1 further includes two upright frames 15 installed on the frame 100. A lower roller seat 17 and an upper roller seat 16 are installed on the upright frames 15. The upper roller seat 16 is connected to a lifting member 3. The lifting member 3 is used to drive the upper roller seat 16 to move in the vertical direction to adjust the distance between the upper pressure wheel 13 and the lower pressure wheel 14, as Figure 2 shown. Generally, the lower roller seat 17 is fixed to the bottom of the bracket 41, and the upper roller seat 16 is driven by the lifting member 3 to move in the vertical direction to adjust the distance between the upper pressure wheel 13 and the lower pressure wheel 14. If an adjusting assembly 2 is also installed on one side of the lower roller shaft 12, another lifting member 3 can be installed on the lower roller seat 17 to achieve synchronous adjustment of the lower roller seat 17. However, generally, only adjusting the upper roller seat 16 can meet most production requirements. In this application, the adjustment of the upper roller seat 16 is taken as an example. In addition, the lifting adjustment of the upper roller seat 16 also enables the distance between the upper pressure wheel 13 and the lower pressure wheel 14 arranged in the sheet conveying direction to be different. Generally, the distance between the upper pressure wheel 13 and the lower pressure wheel 14 arranged in the sheet conveying direction gradually decreases. When one end of the sheet enters between the upper pressure wheel 13 and the lower pressure wheel 14 at the end position, the sheet is first bent into a smaller arc to form a pre-bent mark. As the sheet continues to be conveyed forward, it gradually enters between the upper pressure wheel 13 and the lower pressure wheel 14 with a smaller distance, and the bending arc gradually increases, finally achieving the required forming effect, enabling the sheet to smoothly transition during the conveying process, avoiding stress concentration and material damage caused by sharp bending, and improving product quality and production efficiency. Through this progressive bending design, the sheet is evenly stressed during the forming process, reducing the risk of deformation and fracture, ensuring the consistency and stability of the product. At the same time, the flexible adjustment mechanism enables the equipment to adapt to sheets of different thicknesses and materials, further broadening the application range and improving the comprehensive performance of the production line.

[0040] In addition, in some embodiments, at the positions of the upper roller shaft 11 and the lower roller shaft 12 where the sheet material first comes into contact, only the upper pressing wheel 13 and the lower pressing wheel 14 at the middle position may be retained, and no pressing wheels are provided on both sides to reduce the resistance when the sheet material initially comes into contact and the resistance when the sheet material shrinks towards the middle during bending. Then, the number of pressing wheels on the upper roller shaft 11 and the lower roller shaft 12 along the conveying direction gradually and symmetrically increases from the middle, as Figure 9 shown. This design not only optimizes the force distribution of the sheet material but also reduces energy consumption and avoids excessive friction between the sheet material and other pressing wheels when the sheet material concentrates towards the middle during the initial bending process (because the force required for the sheet material to bend from a flat state is relatively large). As the bending arc appears, the degree of friction generated by the subsequent increase in the bending arc will gradually weaken. Under the progressive arrangement of the upper pressing wheel 13 and the lower pressing wheel 14, the wear between the sheet material and each pressing wheel caused by bending is also reduced, extending the service life of the pressing wheels and also reducing energy consumption.

[0041] In an embodiment of the present invention, the lifting member 3 is of a general threaded rod driving method, which is prior art and will not be specifically described herein;

[0042] The support roller 21 is fixedly installed on one side of the vertical frame 15. The axial direction of the support roller 21 is parallel to the axial direction of the upper roller shaft 11 or the lower roller shaft 12. Since the U-shaped locking block 23 also needs to move up and down when the upper pressing wheel 13 moves up and down, two guide posts 25 are fixedly connected to the top of the U-shaped locking block 23. The guide posts 25 are slidably connected to the inner wall of the support seat 22. By providing the guide posts 25, the U-shaped locking block 23 moves up and down as the upper roller shaft 11 moves up and down.

[0043] In an embodiment of the present invention, a limiting chute 243 is axially provided on the support roller 21. The locking member 24 includes a locking block 241 and a bolt 242. The locking block 241 is slidably connected to the inner wall of the support roller 21. The bolt 242 is threadedly connected to the inner wall of the locking block 241. The bolt 242 is slidably connected to the limiting chute 243. The bolt 242 passes through the support seat 22. When the bolt 242 is rotated for tightening operation, the locking block 241 is pushed towards the inner wall of the support roller 21 and fits tightly, thereby fixing the position of the support roller 21, and the bolt 242 abuts against one side of the support seat 22 to fix the support seat 22 and prevent it from displacing during the working process. When the bolt 242 is rotated for loosening operation, the locking block 241 is separated from the inner wall of the support roller 21, and the locking block 241 can move along the axial direction of the support roller 21, thereby realizing the axial adjustment of the support roller 21.

[0044] In an embodiment of the present invention, an arc-shaped groove 244 is penetrated through the support seat 22. The arc-shaped groove 244 is slidably connected to the bolt 242, as Figure 3As shown, the arc-shaped groove 244 is designed such that when the bolt 242 is loosened, the support seat 22 can rotate axially around the support roller 21, enabling the upper pressure wheel 13 to also rotate to a position above the upper roller shaft 11, as Figure 5 shown. The upper pressure wheel 13 rotated to the upper position can be replaced or maintained, and used as a spare wheel. In some processing scenarios, the upper pressure wheel 13 can avoid the bending of the sheet at this position by rotating above the upper roller shaft 11, as Figure 6 and Figure 7 shown. At this time, the sheet presents a shape with the middle not bent and the two ends bent to meet the requirement of installing other components at local positions of the side plate of the semi-trailer carriage. Through this flexible adjustment mechanism, not only the adaptability and versatility of the equipment are improved, but also the accuracy and efficiency of sheet processing are further optimized, the downtime caused by frequent replacement of the pressure wheel is reduced, and the continuity and stability of the production process are ensured.

[0045] In an embodiment of the present invention, a deviation prevention mechanism 4 is provided on one side of the frame 100 in the sheet input direction. The deviation prevention mechanism 4 includes two brackets 41 installed on the frame 100. A slide bar 42 is installed between the two brackets 41. Two sliders 43 are slidably connected to the slide bar 42. A limit plate 44 is fixedly installed on the slider 43. A limit groove 45 is formed on the opposite sides of the limit plate 44. The height of the limit groove 45 is greater than the thickness of the sheet. When the sheet is bent, its side edge slides in the limit groove 45, effectively preventing the sheet from shifting, keeping the sheet in a centered position, and ensuring the accuracy and stability of the bending process;

[0046] Further, the anti-offset mechanism 4 further includes a bidirectional lead screw 46. The middle of the bidirectional lead screw 46 is rotatably connected to an L-shaped frame 47. The two ends of the bidirectional lead screw 46 are respectively threadedly connected to the inner walls of two sliding platforms 43. A spring 48 is sleeved between the sliding platform 43 and the L-shaped frame 47. The two ends of the spring 48 are respectively fixedly connected to the L-shaped frame 47 and the sliding platform 43. The spring 48 is in a stretched state. When the sliding platform 43 moves, the bidirectional lead screw 46 rotates synchronously, so that the two sliding platforms 43 always move synchronously, approaching or separating from each other synchronously, thereby ensuring that the plate always maintains a central position during the bending process and avoiding processing errors caused by offset. The tensile force of the spring 48 cooperates with the movement of the sliding platform 43, further enhancing the stability and reliability of the anti-offset mechanism 4; in addition, the anti-offset mechanism 4 can also be arranged to be movable along the conveying direction of the plate (not shown in the figure). During processing, the end of the plate can be locked in the limiting groove 45, and the plate is conveyed by the movement of the anti-offset mechanism 4, so that the plate is always subjected to a stable limiting effect during the conveying process, avoiding processing errors caused by vibration or offset during the conveying process; in some embodiments, the active rotation of the upper roller shaft 11 and the lower roller shaft 12 can directly convey the plate, realizing bending and conveying at the same time. At this time, the anti-offset mechanism 4 can be fixed only at the end of the plate, move along with the movement of the plate, and maintain the limiting of the plate during the movement. Specifically, a slide rail (not shown in the figure) for the bracket 41 to move is provided on the frame 100.

[0047] After the plate is bent and formed, it can be cut by the cutting assembly 200 located at the output position to obtain a formed plate with a suitable length. The cutting assembly 200 is prior art and will not be specifically described here.

[0048] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the present invention.

Claims

1. A bending device for the carriage plate of a semi-trailer, comprising a frame (100), characterized in that: An array of tile pressing components (1) and adjusting components (2) are installed on the frame (100). The tile pressing component (1) includes an upper roller shaft (11) and a lower roller shaft (12), an upper pressing wheel (13) installed on the upper roller shaft (11), and a lower pressing wheel (14) installed on the lower roller shaft (12). The adjusting component (2) includes a support roller (21) arranged above and / or below the tile pressing component (1). A support seat (22) is sleeved on the support roller (21). One end of the support seat (22) is slidably connected with a U-shaped locking block (23). Both ends of the U-shaped locking block (23) are rotatably connected with both ends of the upper pressing wheel (13) or the lower pressing wheel (14). A locking member (24) is installed on one side of the support seat (22). The locking member (24) is used to restrict the axial movement and circumferential rotation of the support seat (22) along the support roller (21). When the locking member (24) is in the unlocked state, the support seat (22) is allowed to move on the support roller (21).

2. The bending device for the semi-trailer carriage plate according to claim 1, characterized in that, The upper roller shaft (11) and the lower roller shaft (12) are air shaft. When the air shaft is in the tightened state, it is used to restrict the movement of the upper pressing wheel (13) and the lower pressing wheel (14). When the air shaft is in the contracted state, the restriction on the upper pressing wheel (13) and the lower pressing wheel (14) is released.

3. The bending device for the semi-trailer carriage plate according to claim 2, wherein, The tile pressing component (1) further includes two vertical frames (15) installed on the frame (100). A lower roller seat (17) and an upper roller seat (16) are installed on the vertical frame (15). The upper roller seat (16) is connected with a lifting member (3). The lifting member (3) is used to drive the upper roller seat (16) to move in the vertical direction to adjust the distance between the upper pressing wheel (13) and the lower pressing wheel (14).

4. The bending device for the semi-trailer carriage plate according to claim 3, characterized in that, The support roller (21) is fixedly installed on one side of the vertical frame (15). The axial direction of the support roller (21) is parallel to the axial direction of the upper roller shaft (11) or the lower roller shaft (12). Two guide posts (25) are fixedly connected to the top of the U-shaped locking block (23). The guide posts (25) are slidably connected with the inner wall of the support seat (22).

5. A semi-trailer carriage plate bending device according to claim 1, characterized in that, A limiting chute (243) is axially formed on the support roller (21). The locking member (24) includes a lock block (241) and a bolt (242). The lock block (241) is slidably connected with the inner wall of the support roller (21). The bolt (242) is threadedly connected with the inner wall of the lock block (241). The bolt (242) is slidably connected with the limiting chute (243).

6. The bending device for the semi-trailer carriage plate according to claim 5, characterized in that, An arc-shaped groove (244) is formed through the support seat (22). The arc-shaped groove (244) is slidably connected with the bolt (242).

7. A bending device for the semi-trailer carriage plate according to claim 1, characterized in that, An anti-deviation mechanism (4) is arranged on one side of the frame (100) in the direction of the sheet material input. The anti-deviation mechanism (4) includes two brackets (41) installed on the frame (100). A slide bar (42) is installed between the two brackets (41). Two sliders (43) are slidably connected to the slide bar (42). A limiting plate (44) is fixedly installed on the slider (43). A limiting groove (45) is formed on the opposite sides of the limiting plate (44).

8. A bending device for the semi-trailer carriage plate according to claim 7, characterized in that, The anti-deviation mechanism (4) further includes a bidirectional lead screw (46). The middle of the bidirectional lead screw (46) is rotationally connected to an L-shaped frame (47). The two ends of the bidirectional lead screw (46) are respectively threadedly connected to the inner walls of two sliding platforms (43). A spring (48) is sleeved between the sliding platform (43) and the L-shaped frame (47). The two ends of the spring (48) are respectively fixedly connected to the L-shaped frame (47) and the sliding platform (43).

9. The bending device for the semi-trailer carriage plate according to claim 8, characterized in that, The anti-deviation mechanism (4) can move along the direction of sheet conveying.

10. A semi-trailer carriage plate bending device according to claim 3, characterized in that, The distance between the upper pressing wheel (13) and the lower pressing wheel (14) arranged along the sheet conveying direction gradually decreases.

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