Bending device for manufacturing metal structure

By designing a metal structure bending device including an adapter mechanism, a guide mechanism, a fixing mechanism, a bending mechanism and a heating mechanism, the problem of difficult to maintain the precise position of the metal structure during the bending process in the prior art is solved, and high-precision bending processing and quality stability are achieved.

CN119819762APending Publication Date: 2025-04-15SICHUAN PINZHONG STEEL STRUCTURE CO LTD
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Patent Information

Application Number
CN202510186068.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

The existing metal structure bending devices are difficult to ensure that the metal structure is accurately in the appropriate processing position during the entire bending process, resulting in machining errors and affecting the bending accuracy and the quality stability of the metal structural parts.

Method used

A bending device including an adapter mechanism, a guide mechanism, a fixing mechanism, a bending mechanism and a heating mechanism is designed. By adjusting the height of the support plate, the guide mechanism and the fixing mechanism can be adaptively adjusted to ensure that the metal structure is in the precise position of each link and avoid processing errors caused by height difference.

Benefits of technology

The precise position of the metal structure is maintained during the entire bending process, the bending accuracy is improved, the quality stability of the metal structural parts is ensured, and it can adapt to metal structure processing of different sizes and shapes.

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Abstract

The invention relates to the technical field of metal bending, and discloses a bending device for metal structure manufacturing, which comprises a worktable, adaptive mechanisms are arranged on two sides of the top of the worktable, a guide mechanism is arranged on one side of the top of each adaptive mechanism, and a fixing mechanism is arranged on the other side of the top of each adaptive mechanism. A supporting frame is fixedly connected to the middle section of the top of the workbench, a bending mechanism is arranged on one side of the bottom of the supporting frame, a heating mechanism is arranged on the other side of the bottom of the supporting frame, and a slot position mechanism is arranged on the side, close to one of the adaptive mechanisms, of the top of the workbench. The adaptation mechanism comprises a supporting plate and a double-shaft motor. By adjusting the height of the supporting plate, the height of the guiding mechanism and the height of the fixing mechanism can be correspondingly changed according to the adjusting height of the groove position mechanism, and it is ensured that in the whole bending process, the metal structure can be kept at the proper machining position in all links from entering the device to bending completion.
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Description

Technical Field

[0001] The invention relates to the technical field of metal bending, in particular to a bending device for metal structure manufacturing. Background Art

[0002] With the rapid development of modern industry, metal structures are increasingly used in many fields, such as construction, machinery manufacturing, and the automotive industry. In the manufacturing process of metal structures, bending is an extremely critical process, and its processing accuracy and quality directly affect whether the final metal structure can meet the diverse use requirements. In order to complete the bending of metal structures efficiently and with high quality, various bending devices have emerged. Most metal structures are in the shape of plates, and the bending positions need to be heated.

[0003] At present, there are many kinds of metal structure bending devices on the market. Most of these devices have basic bending functions, and some are also equipped with corresponding fixed structures to limit the metal structure. At the same time, some also take into account the processing conditions of metal structures of different sizes and specifications, and try to adapt to different sizes through simple adjustment structures. For example, some manually replace molds or slot components of different specifications to deal with metal structures of different sizes, and some use screw transmission and other methods to adjust the position of bending components within a certain range.

[0004] However, these existing metal structure bending devices often have difficulty in ensuring that the metal structure is accurately in the appropriate processing position at every stage from entering the device to completing the bending process. Due to the lack of an effective height coordination adjustment mechanism, when facing metal structures of different sizes and shapes, processing errors are prone to occur due to the height difference between the various mechanisms, which in turn affects the bending accuracy, and cannot fully guarantee the quality stability of metal structural parts, making it difficult to meet the current requirements of high-precision metal structure manufacturing. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a press bending device for metal structure manufacturing, which solves the problem that the existing metal structure press bending devices are often difficult to ensure that the metal structure is accurately in the appropriate processing position in each link from entering the device to completing the bending process.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bending device for metal structure manufacturing, comprising a workbench, both sides of the top of the workbench are provided with adapting mechanisms, one side of the top of the adapting mechanism is provided with a guiding mechanism, the other side of the top of the adapting mechanism is provided with a fixing mechanism, the middle section of the top of the workbench is fixedly connected with a support frame, one side of the bottom of the support frame is provided with a bending mechanism, the other side of the bottom of the support frame is provided with a heating mechanism, and a slot mechanism is provided on one side of the top of the workbench close to one of the adapting mechanisms;

[0007] The adaptation mechanism includes a support plate and a double-axis motor, the bottom of the double-axis motor is fixedly connected to the top of the workbench, the two output ends of the double-axis motor are fixedly connected to a connecting rod 1, the external rotation of the connecting rod 1 is connected to a support block, the bottom of the support block is fixedly connected to the workbench, the ends of the connecting rod 1 that are away from each other are fixedly connected to a connecting rod 2, one end of the connecting rod 2 is fixedly connected to a bevel gear 1, the top of the workbench is fixedly connected to two support cylinders, the inner wall of the support cylinder is slidably connected to a moving cylinder, the top of the moving cylinder is fixedly connected to the bottom of the support plate, the inner wall of the moving cylinder is threadedly connected to a screw, the bottom end of the screw is fixedly connected to a bevel gear 2, the bevel gear 1 is meshingly connected to the bevel gear 2, and auxiliary support components are provided on both sides of the bottom of the support plate, and the auxiliary support components are used to auxiliary support the support plate.

[0008] Preferably, the auxiliary support assembly includes a connecting rod 1 and a connecting rod 2, the connecting rod 1 and the connecting rod 2 are connected by a rotating shaft, one end of the connecting rod 1 is rotatably connected to the top of the workbench, and one end of the connecting rod 2 is rotatably connected to a bottom corner of the support plate, the top of the workbench is fixedly connected to a fixed shell 1, the inner wall of the fixed shell 1 is slidably connected to a slider 1, the other end of the connecting rod 2 is rotatably connected to the outer side of the slider 1, the bottom side of the support plate is fixedly connected to a fixed shell 2, the inner wall of the fixed shell 2 is slidably connected to the slider 2, and the other end of the connecting rod 1 is rotatably connected to the outer side of the slider 2.

[0009] Preferably, the guiding mechanism comprises a connecting plate, the bottom of which is fixedly connected to one side of the top of the supporting plate, both sides of the top of the connecting plate are fixedly connected to the connecting plate, a guide rod is slidably connected to the internal through hole of the connecting plate, a spring 1 is sleeved on the outside of the guide rod, the opposite ends of the two guide rods are fixedly connected to the guide plate, and the two ends of the spring 1 are arranged between the connecting plate and the guide plate.

[0010] Preferably, a guide roller is provided between the two guide plates, and both outer sides of the guide roller are rotatably connected to support rods, and the bottom of the support rod is fixedly connected to the top of the connecting plate.

[0011] Preferably, the fixing mechanism includes a fixing plate, the bottoms of the two fixing plates are fixedly connected to the top of the supporting plate, the inner wall of the fixing plate is rotatably connected to a bidirectional threaded rod 1, one end of the bidirectional threaded rod 1 is fixedly connected to a turntable, the external threads of the bidirectional threaded rod 1 are connected to two clamping plates, a roller is rotatably connected between the two fixing plates, and the outside of the roller is slidably connected to the internal through hole of the clamping plate.

[0012] Preferably, the bending mechanism includes a cylinder and a bending block, the cylinder is installed on one side of the top of the support frame, the cylinder and the bending block are connected by a fixing component, the fixing component includes a connecting block and an assembly block, the top of the connecting block is fixedly connected to the output end of the cylinder, the bottom of the assembly block is fixedly connected to the top of the bending block, the outer side of the assembly block is plug-fitted with the through hole of the connecting block, a locking plate is rotatably connected to one side of the outer side of the connecting block, the outer side of the locking plate is plug-fitted with the groove of the assembly block, a reinforcement component is arranged on the outer side of the connecting block, and the reinforcement component is used for reinforcing the bending block when it is fixed.

[0013] Preferably, the reinforcement assembly includes a mounting shell, the outer side of the mounting shell is fixedly connected to the outer side of the connecting block, the inner wall of the mounting shell is slidably connected to a movable plate, one end of the movable plate is fixedly connected to an insertion rod, one end of the insertion rod is plugged into a groove of a locking plate, the other end of the movable plate is fixedly connected to a pull rod, the outer side of the pull rod is provided with a spring 2, one end of the spring 2 is fixedly connected to the other side of the movable plate, and the other end of the spring 2 is fixedly connected to the inner wall of the mounting shell.

[0014] Preferably, the slot mechanism includes a connecting platform, the bottom of which is fixed to the top of the workbench, a driving motor is installed on the outer side of the connecting platform, the output end of the driving motor is fixedly connected to a transmission rod, two worms are fixedly connected to the outside of the transmission rod, the outer side of the worm is meshingly connected to a worm wheel, the outer side of the worm wheel is fixedly connected to a two-way threaded rod, the outer side of the two-way threaded rod is threadedly connected to two moving sleeves, the top of the moving sleeve is rotatably connected to a rotating rod, one end of the rotating rod is rotatably connected to a bending slot plate, a bending slot block is arranged between the two bending slot plates, and the bottom of the bending slot block is fixedly connected to the top of the connecting platform.

[0015] Preferably, the heating mechanism includes an air storage box, which is fixedly connected to one side of the top of the support frame, the outer side of the air storage box is connected to an air outlet pipe 1, one end of the air outlet pipe 1 is fixedly connected to an air distribution pipe, the outer side of the air distribution pipe is connected to multiple air outlet pipes 2, one end of the air outlet pipe 2 is fixedly connected to a connecting pipe, the bottom of the connecting pipe is fixedly connected to a flame burning head, the outer side of the air outlet pipe 1 is provided with a valve 1, and the outer side of the air outlet pipe 2 is provided with a valve 2.

[0016] Preferably, both sides of the outside of the gas distribution pipe are fixedly connected with a fixing frame 1, the top of which is fixedly connected to the bottom of the support frame, and both sides of the outside of each of the connecting pipes are fixedly connected with a fixing frame 2, the top of which is fixedly connected to the bottom of the support frame.

[0017] The present invention provides a bending device for metal structure manufacturing, which has the following beneficial effects:

[0018] 1. The present invention adjusts the height of the support plate so that the guide mechanism and the fixing mechanism can change their own heights accordingly according to the adjustment height of the slot mechanism, thereby ensuring that during the entire bending process, the metal structure can be kept in a suitable processing position at each stage from entering the device to completing the bending, avoiding processing errors caused by height differences, and effectively improving the bending accuracy. When the metal structure enters the bending device, the guide mechanism can accurately guide the metal structure to a suitable processing position through the synergistic effect of the guide plate and the guide roller. Its adaptive adjustment characteristics can cope with metal structures of different sizes and shapes, ensuring that they enter the fixing mechanism in the correct position. The fixing mechanism then firmly fixes the metal structure to prevent the metal structure from shifting during the bending process, so that the metal structure can be processed according to the preset shape and angle during bending, greatly improving the bending accuracy and ensuring the quality stability of the metal structure.

[0019] 2. The movable sleeve of the present invention drives the bending groove plate to move through the rotating rod, thereby changing the distance between the two bending groove plates and the bending groove block, which can meet the bending requirements of metal structures of different sizes and shapes, provide suitable slots for the bending of metal structures, broaden the range of processable materials of the device, and improve the versatility of the equipment.

[0020] 3. In the bending operation of the present invention, the spring, plug rod and other reinforcing components can prevent the lock plate from loosening, make the connection between the bending block and the connecting block more stable, ensure the stability and accuracy of the bending action, and improve the quality and accuracy of the bending. When disassembling, the bending block can be easily removed by simple operations such as pulling the pull rod and turning the lock plate, which is convenient for replacing or repairing the bending block. This reduces the time and difficulty of equipment maintenance, improves the maintainability and use efficiency of the entire bending device, and reduces the risk of long-term equipment shutdown due to component damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 It is a side view structural schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the adapting mechanism of the present invention;

[0024] Figure 4It is a schematic diagram of the support tube structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the guide mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the fixing mechanism structure of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the bending block of the present invention;

[0028] Figure 8 For the present invention Figure 7 A in the enlarged view;

[0029] Fig. 9 It is a schematic diagram of the lock plate structure of the present invention;

[0030] Fig.10 It is a schematic diagram of the slot mechanism structure of the present invention;

[0031] Fig.11 It is a schematic diagram of the rotating rod structure of the present invention;

[0032] Fig.12 It is a schematic diagram of the heating mechanism structure of the present invention;

[0033] Fig.13 It is a schematic diagram of the fixing frame structure of the present invention.

[0034] Among them, 1. workbench; 2. adapter mechanism; 201. support plate; 202. double-axis motor; 203. connecting rod 1; 204. support block; 205. connecting rod 2; 206. bevel gear 1; 207. bevel gear 2; 208. screw; 209. moving cylinder; 2010. support cylinder; 2011. connecting rod 1; 2012. connecting rod 2; 2013. fixed shell 1; 2014. slider 1; 2015. fixed shell 2; 2016. slider 2; 3. guide mechanism; 301. connecting plate; 302. connecting plate; 303. guide rod; 304. spring 1; 305. guide plate; 306. support rod; 307. guide roller; 4. fixing mechanism; 401. fixing plate; 402. two-way threaded rod 1; 403. turntable; 404. clamping plate; 405. roller; 5. support Bracket; 6, bending mechanism; 601, cylinder; 602, bending block; 603, connecting block; 604, assembly block; 605, mounting shell; 606, moving plate; 607, plug rod; 608, pull rod; 609, spring 2; 6010, locking plate; 7, slot mechanism; 701, connecting table; 702, driving motor; 703, transmission rod; 704, worm; 705, worm wheel; 706 , bending groove block; 707, two-way threaded rods; 708, movable sleeve; 709, rotating rod; 7010, bending groove plate; 8, heating mechanism; 801, gas storage box; 802, outlet pipe one; 803, valve one; 804, gas distribution pipe; 805, outlet pipe two; 806, valve two; 807, connecting pipe; 808, flame burning head; 809, fixing frame one; 8010, fixing frame two. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the specification 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.

[0036] See also Figure 1-Figure 13The embodiment of the present invention provides a bending device for metal structure manufacturing, including a workbench 1, and adapter mechanisms 2 are arranged on both sides of the top of the workbench 1. The adapter mechanisms 2 arranged on both sides can flexibly adjust the height, so that the entire device can adapt to the processing of metal structures of different specifications. The bilateral symmetrical layout is conducive to maintaining the balance and stability of the device. A guide mechanism 3 is arranged on one side of the top of the adapter mechanism 2. Relying on the adjustable height of the adapter mechanism 2, the guide mechanism 3 can work at different heights. Through the synergistic effect of the guide plate 305 and the guide roller 307, when the metal structure enters the device, the guide mechanism 3 can adaptively adjust the position of the guide plate 305 according to the size, shape, position and angle of entry of the metal structure. The spring 1 304 can make the guide plate 305 slide flexibly on the guide rod 303, so as to accurately guide different metal structures, ensure that the metal structure can accurately enter the subsequent processing flow, especially can accurately reach the appropriate position of the fixing mechanism 4, and lay the foundation for high-precision processing of the entire bending process. A fixing mechanism 4 is provided on the other side of the top of the adapter mechanism 2. Based on the height adjustment function of the adapter mechanism 2, the fixing mechanism 4 can effectively fix the metal structure at a suitable height. After the metal structure is guided by the guide mechanism 3, the bidirectional threaded rod 402 in the fixing mechanism 4 rotates, so that the two clamping plates 404 move toward or away from each other under the restriction of the roller 405, thereby clamping or loosening the metal structure, firmly clamping the metal structure, and preventing the displacement of the metal structure during the bending process, so that the metal structure can be processed strictly according to the preset shape and angle during bending, which greatly improves the bending accuracy and ensures the quality and shape stability of the final metal structure. A support frame 5 is fixedly connected to the top middle section of the workbench 1, providing a stable installation foundation for the bending mechanism 6 and the heating mechanism 8. A bending mechanism 6 is provided on one side of the bottom of the support frame 5. Under the stable support of the support frame 5, the bending mechanism 6 (such as by driving the bending block 602 downward through the cylinder 601) can accurately apply pressure to the metal structure placed in a suitable position (such as on the bending slot plate 7010) to achieve the bending operation. A heating mechanism 8 is provided on the other side of the bottom of the support frame 5. The heating mechanism 8 can heat the part of the metal structure that needs to be bent under the support of the support frame 5. A slot mechanism 7 is provided on the top of the workbench 1 near one of the adapter mechanisms 2, and the slot mechanism 7 is close to the adapter mechanism 2 to facilitate the coordination with the height adjustment function of the entire device. The slot mechanism 7 changes the spacing between the two bending slot plates 7010 and the bending slot block 706 through the coordinated work of the driving motor 702, the worm 704, the worm wheel 705, the two-way threaded rod 707 and other components, thereby providing a suitable bending slot for metal structures of different sizes and shapes.

[0037] The adaption mechanism 2 includes a support plate 201 and a dual-axis motor 202. The bottom of the dual-axis motor 202 is fixedly connected to the top of the workbench 1, so that the dual-axis motor 202 is firmly installed on the top of the workbench 1. Both output ends of the dual-axis motor 202 are fixedly connected to a connecting rod 1 203. The dual output end design of the dual-axis motor 202 can drive two connecting rods 1 203 to rotate at the same time. The external rotation of the connecting rod 1 203 is connected to a support block 204. The bottom of the support block 204 is fixedly connected to the workbench 1. The support block 204 ensures effective support for the connecting rod 1 203 while not restricting its rotation, so that the connecting rod 1 203 can smoothly rotate around the support block 204, thereby smoothly transmitting the power of the dual-axis motor 202, ensuring the continuity and smoothness of the entire power transmission link. The ends of the connecting rod 1 203 that are far away from each other are fixedly connected to the connecting rod 2 205. The connecting rod 2 205 plays a connecting role, so that the power of the dual-axis motor 202 is transmitted to the bevel gear 1 206. One end of the connecting rod 2 205 is fixedly connected to the bevel gear 1 206. The setting of the bevel gear 1 206 converts the rotational power transmitted from the connecting rod 2 205 into a form suitable for bevel gear transmission. The top of the workbench 1 is fixedly connected to two support cylinders 2010, and the inner wall of the support cylinder 2010 is slidably connected to the moving cylinder 209. The top of the moving cylinder 209 is fixedly connected to the bottom of the support plate 201. The two support cylinders 2010 are fixed on the workbench 1, providing a stable and vertical guide channel for the moving cylinder 209, ensuring that the moving cylinder 209 can only slide up and down along the inner wall of the support cylinder 2010, avoiding the unstable situation such as deviation and shaking during the lifting process. The up and down movement of the moving cylinder 209 can drive the support plate 201 to achieve a change in height. The inner wall of the moving cylinder 209 is threadedly connected with a screw rod 208, and the bottom end of the screw rod 208 is fixedly connected with a bevel gear 207, and the bevel gear 1 206 is meshed with the bevel gear 207. The meshing transmission of the bevel gear 1 206 and the bevel gear 207 accurately transmits the power from the bevel gear 1 206 to the screw rod 208, driving the screw rod 208 to rotate. The threaded connection relationship between the screw rod 208 and the moving cylinder 209 allows the rotational motion of the screw rod 208 to be converted into the linear lifting motion of the moving cylinder 209, thereby driving the support plate 201 to achieve precise height adjustment.

[0038] See also Figure 1-Figure 3, auxiliary support components are provided on both sides of the bottom of the support plate 201, and the auxiliary support components are used to provide auxiliary support for the support plate 201. The auxiliary support components include a connecting rod 1 2011 and a connecting rod 2 2012. The connecting rod 1 2011 and the connecting rod 2 2012 are connected by a rotating shaft, and the connecting rod 1 2011 and the connecting rod 2 2012 can rotate relative to each other through the rotating shaft connection. This flexible connection method can adjust the angle between the two in real time according to the actual position change during the lifting process of the support plate 201, so as to achieve coordinated action. One end of the connecting rod 1 2011 is rotatably connected to the top of the workbench 1, so that the connecting rod 1 2011 can flexibly rotate around the connection point when the support plate 201 is lifted or lowered, and the normal movement of the support plate 201 will not be restricted by the fixed connection. One end of the connecting rod 2012 is rotatably connected to a bottom corner of the support plate 201. When the support plate 201 is at different heights and is subjected to external forces in different directions, the connecting rod 2012 can rotate accordingly with the change of its angle, sharing the force for the support plate 201 from the side, thereby enhancing the stability of the support plate 201 during the lifting and working process. The top of the workbench 1 is fixedly connected with a fixed shell 2013, and the inner wall of the fixed shell 2013 is slidably connected with a slider 2014. The other end of the connecting rod 2012 is rotatably connected to the outer side of the slider 2014. The fixed shell 2013 is fixed on the workbench 1, providing a stable sliding track for the slider 2014, ensuring that the slider 2014 can only slide in a straight line along the inner wall of the fixed shell 2013. The connection rod 2012 is rotatably connected with the slider 1 2014, so that when the connection rod 2012 rotates with the lifting of the support plate 201, the slider 1 2014 can slide adaptively in the fixed shell 1 2013, playing a guiding role. The bottom side of the support plate 201 is fixedly connected with the fixed shell 2015, and the inner wall of the fixed shell 2015 is slidably connected with the slider 2016. The other end of the connection rod 1 2011 is rotatably connected to the outer side of the slider 2 2016. The setting of the fixed shell 2015 and the slider 2 2016 is similar to the above-mentioned fixed shell 1 2013 and the slider 1 2014, but the connection rod 1 2011 is constrained and guided from another direction. Through the sliding of the slider 2016 in the fixed shell 2015 and the rotational connection with the connection rod 1 2011, the connection rod 1 2011 can flexibly adjust the angle and maintain stable support force transmission according to the movement of the support plate 201 during the auxiliary support process.

[0039] See also Figure 1 , Figure 2 and Figure 5The guide mechanism 3 includes a connecting plate 301, the bottom of which is fixedly connected to one side of the top of the support plate 201, and the connecting plate 301 is firmly connected to the support plate 201, so that the guide mechanism 3 can rely on the adjustable height advantage of the support plate 201 in the adapter mechanism 2 to be at a suitable working height position. Both sides of the top of the connecting plate 301 are fixedly connected to the connecting plate 302. When the guide mechanism 3 is working, the external force acting on the guide plate 305 and other components can be transmitted to the connecting plate 301 through the connecting plate 302. A guide rod 303 is slidably connected to the internal through hole of the connecting plate 302, providing a precise linear motion guide for the guide plate 305. When the metal structure enters the guide mechanism 3 and contacts the guide plate 305 to generate a force, the guide rod 303 limits the guide plate 305 to slide only along its axial direction. The outer sleeve of the guide rod 303 is provided with a spring 1 304. The spring 1 304 uses its own elastic restoring force to make the guide plate 305 adjust its position adaptively according to the specific position of the metal structure and the applied pressure, ensuring that no matter in what state the metal structure enters, the guide plate 305 can be closely fitted and accurately guided, further enhancing the adaptability of the guide mechanism 3 to metal structures of different specifications and the accuracy of guidance. The opposite ends of the two guide rods 303 are fixedly connected with the guide plates 305, and the guide plates 305 are respectively connected by the two guide rods 303, so that the guide plates 305 can maintain a stable and symmetrical state during the movement. The two guide rods 303 can jointly limit the freedom of the guide plate 305 to prevent it from being skewed, twisted and other unstable conditions, ensuring that the guide plate 305 always guides the metal structure in a correct posture. The two ends of the spring 1 304 are arranged between the connecting plate 302 and the guide plate 305 to provide support points for the spring 1 304.

[0040] See also Figure 5 A guide roller 307 is arranged between the two guide plates 305, and the outer sides of the guide roller 307 are rotatably connected with support rods 306, and the bottom of the support rod 306 is fixedly connected to the top of the connecting plate 301. When the metal structure moves between the two guide plates 305, it contacts the guide roller 307. Since the guide roller 307 can rotate freely under the support of the support rod 306, the friction force during the movement of the metal structure is greatly reduced. This not only allows the metal structure to pass through the guide mechanism 3 more easily and smoothly, but also improves the processing efficiency.

[0041] See also Figure 1 , Figure 2 , Figure 5 and Figure 6The fixing mechanism 4 includes a fixing plate 401, and the bottoms of the two fixing plates 401 are fixedly connected to the top of the support plate 201, so that the fixing mechanism 4 can be flexibly in a suitable working height position with the help of the adjustable height function of the support plate 201 in the adapter mechanism 2. The inner wall of the fixing plate 401 is rotatably connected with a two-way threaded rod 402, so that the two-way threaded rod 402 can rotate smoothly in the space defined by the fixing plate 401. One end of the two-way threaded rod 402 is fixedly connected with a turntable 403, and the setting of the turntable 403 provides an operator with a convenient force application component. By manually rotating the turntable 403, the external force can be easily transmitted to the two-way threaded rod 402 to rotate it. The external thread of the two-way threaded rod 402 is connected to two clamping plates 404, and the two clamping plates 404 can make linear motions toward or away from each other along the two-way threaded rod 402. It also has self-locking properties. Once the position of the clamping plate 404 is adjusted to clamp the metal structure, it can ensure that the clamping plate 404 will not loosen due to external interference during the bending process, thereby achieving a stable and reliable fixing effect. A roller 405 is rotatably connected between the two fixing plates 401. The outside of the roller 405 is slidably connected to the internal through hole of the clamping plate 404. When the metal structure slides on the roller 405, it is easy to move the metal structure.

[0042] See also Figure 1 , Figure 2 , Figure 7 , Figure 8 and Fig. 9The bending mechanism 6 includes a cylinder 601 and a bending block 602. The cylinder 601, as a power source, can provide a stable and adjustable linear driving force. This driving method is easy to control the force and stroke, and can accurately output the corresponding pressure according to the actual processing requirements such as the material, size and required bending degree of different metal structures. The bending block 602 is an actuator that directly acts on the metal structure, and performs a bending operation on the metal structure under the drive of the cylinder 601. The cylinder 601 is installed on one side of the top of the support frame 5. The cylinder 601 is installed on the support frame 5. With the characteristics that the support frame 5 is located in the middle of the top of the workbench 1 and has a stable structure, a solid and reliable installation foundation is provided for the cylinder 601. The cylinder 601 is connected to the bending block 602 through a fixed component, which includes a connecting block 603 and an assembly block 604. The top of the connecting block 603 is fixedly connected to the output end of the cylinder 601, and the bottom of the assembly block 604 is fixedly connected to the top of the bending block 602. The outer side of the assembly block 604 is plugged into the through hole of the connecting block 603. The plug-in connection mode of the connecting block 603 and the assembly block 604 is relatively simple in structure but very reliable, and can make the cylinder 601 and the bending block 602 tightly connected. On the one hand, it ensures that the driving force output by the cylinder 601 can be effectively transmitted to the bending block 602 through the connecting block 603 and the assembly block 604, avoiding the loss of force or interruption of transmission during the force transmission process, and ensuring that the bending block 602 can obtain sufficient and stable pressure to perform the bending operation; on the other hand, the plug-in connection facilitates installation and disassembly, and is more convenient and efficient in the assembly, maintenance of the device and replacement of the bending block 602. A locking plate 6010 is rotatably connected to one side of the outer side of the connecting block 603, and the outer side of the locking plate 6010 is plugged into the groove of the assembly block 604. By rotating the locking plate 6010 and inserting it into the groove of the assembly block 604, the horizontal movement of the bending block 602 can be limited, preventing the bending block 602 from accidentally detaching from the connecting block 603 due to lateral forces and other factors during the bending process, thereby enhancing the stability of the connection between the two and ensuring that the bending operation can be carried out safely and stably.

[0043] See also Figure 7 and Figure 8A reinforcement component is arranged on the outer side of the connection block 603, and the reinforcement component is used to reinforce the bending block 602 when it is fixed. The reinforcement component includes a mounting shell 605, and the outer side of the mounting shell 605 is fixedly connected to the outer side of the connection block 603. The mounting shell 605 is fixed on the connection block 603, providing a stable mounting carrier for the entire reinforcement component. A moving plate 606 is slidably connected to the inner wall of the mounting shell 605, and the moving plate 606 can transfer the externally applied tensile force or the elastic force of the spring to the insertion rod 607 through its own sliding. One end of the moving plate 606 is fixedly connected to the insertion rod 607, and one end of the insertion rod 607 is plugged into the groove of the locking plate 6010, so that the position change of the moving plate 606 can directly drive the insertion rod 607 to move synchronously. When the insertion rod 607 is inserted into the groove of the locking plate 6010, an effective limiting effect is formed in the direction perpendicular to the plane of the locking plate 6010, and the locking plate 6010 cooperates with the horizontal limiting of the bending block 602, further limiting the degree of freedom of the locking plate 6010 to prevent it from loosening or falling out. The other end of the movable plate 606 is fixedly connected with a pull rod 608, which provides a convenient force application position for the operator. When the bending block 602 needs to be disassembled, the operator can easily drive the movable plate 606 to move by pulling the pull rod 608. The outer sleeve of the pull rod 608 is provided with a spring 609, one end of the spring 609 is fixedly connected to the other side of the movable plate 606, and the other end of the spring 609 is fixedly connected to the inner wall of the mounting shell 605. When the bending block 602 is normally installed and reinforced, when the insertion rod 607 is inserted into the groove of the locking plate 6010, the spring 609 will be compressed, and the elastic force generated by it acts on the movable plate 606, so that the insertion rod 607 can be tightly pressed in the groove of the locking plate 6010, automatically achieving the reinforcement effect and ensuring the stability of the connection.

[0044] See also Figure 1 , Figure 2 , Fig.10 and Fig.11, the slot mechanism 7 includes a connecting platform 701, the bottom of which is fixed on the top of the workbench 1, and the connecting platform 701 is fixed on the workbench 1, so that the slot mechanism 7 has a solid and stable installation foundation. The drive motor 702 is installed on the outside of the connecting platform 701 to ensure the installation position of the drive motor 702. The output end of the drive motor 702 is fixedly connected with a transmission rod 703, so that the rotational power output by the drive motor 702 can be efficiently and stably transmitted to the transmission rod 703. The outside of the transmission rod 703 is fixedly connected with two worms 704, which realizes the distribution of power and can drive the two worms 704 to rotate synchronously at the same time, ensuring the balance and stability of subsequent transmission, and avoiding the accuracy of slot adjustment affected by uneven force on one side. The outside of the worm 704 is meshed with a worm wheel 705, so that the worm wheel 705 rotates, and the outside of the worm wheel 705 is fixedly connected with a two-way threaded rod 707, which transmits the rotational power from the worm wheel 705 to the two-way threaded rod 707 to drive it to rotate. The external threads of the bidirectional threaded rod 707 are connected to two moving sleeves 708, so that the moving sleeves 708 can accurately move linearly along the axial direction as the bidirectional threaded rod 707 rotates. The top of the moving sleeve 708 is rotatably connected to a rotating rod 709, so that during the linear movement of the moving sleeve 708, the force and displacement changes can be effectively transmitted to the bending groove plate 7010 through the rotating rod 709. One end of the rotating rod 709 is rotatably connected to the bending groove plate 7010, so that the rotating rod 709 can drive the bending groove plate 7010 to move in the expected direction and trajectory. A bending groove block 706 is arranged between the two bending groove plates 7010. The bottom of the bending groove block 706 is fixedly connected to the top of the connecting platform 701. The bending groove block 706 is fixed on the connecting platform 701 and its position is relatively fixed, which provides a reference base for the two movable bending groove plates 7010, so that the two bending groove plates 7010 can adjust the spacing around the bending groove block 706 to jointly form a suitable bending groove space.

[0045] See also Figure 1 , Figure 2 , Fig.12 and Fig.13The heating mechanism 8 includes an air storage box 801, which is fixedly connected to one side of the top of the support frame 5, providing a reliable installation foundation for the air storage box 801. The outer side of the air storage box 801 is connected with an air outlet pipe 1 802, which serves as a bridge connecting the air storage box 801 with the subsequent air pipe components, and provides a stable and directional outlet channel for the stored gas. One end of the air outlet pipe 1 802 is fixedly connected with a gas distribution pipe 804, so that the gas flowing out of the air storage box 801 can be reasonably distributed here. The outer side of the gas distribution pipe 804 is connected with multiple air outlet pipes 2 805, which further refines the gas distribution path and guides the gas diverted by the gas distribution pipe 804 to different positions more accurately. One end of the air outlet pipe 2 805 is fixedly connected with a connecting pipe 807, which plays a role in transition and directional gas delivery. It can accurately deliver the gas derived from the air outlet pipe 2 805 to the flame burning head 808. The bottom of the connecting pipe 807 is fixedly connected with a flame burning head 808. The flame burning head 808 is the final heating execution component. Through the fixed connection with the connecting pipe 807, it can receive the gas transported from the gas storage box 801 through each gas pipe in sequence, and ignite it to convert it into flame, which directly acts on the part of the metal structure that needs to be bent for heating. The outer side of the outlet pipe 1 802 is provided with a valve 1 803, and the outer side of the outlet pipe 2 805 is provided with a valve 2 806. The settings of valve 1 803 and valve 2 806 are respectively for the outlet pipe 1 802 and the outlet pipe 2 805. The operator can accurately control the flow of gas in different pipelines by adjusting the opening of these two valves. Valve one 803 can perform macro-control on the total gas flow out of the gas storage box 801, while valve two 806 can further refine the control of the gas flow of each branch. The cooperation of the two makes it possible to flexibly adjust the size, intensity and heating range of the flame according to actual heating needs, thereby achieving precise adjustment of the heating effect, and when the width of the metal structure is too large or too small, closing or opening valve two 806 can prevent waste of resources.

[0046] See also Figure 1 , Figure 2 , Fig.12 and Fig.13 The two sides of the gas distribution pipe 804 are fixedly connected with a fixing frame 1 809, and the top of the fixing frame 1 809 is fixedly connected to the bottom of the support frame 5. The fixing frame 1 809 firmly fixes the gas distribution pipe 804 on the support frame 5, so that the gas distribution pipe 804 has a stable support structure. The two sides of the outside of each connecting pipe 807 are fixedly connected with a fixing frame 2 8010, and the top of the fixing frame 2 8010 is fixedly connected to the bottom of the support frame 5. The fixing frame 2 8010 provides reliable support and fixation for the connecting pipe 807. The connecting pipe 807 plays an important role in accurately transmitting the gas delivered by the gas outlet pipe 2 805 to the flame burning head 808.

[0047] Working principle: The dual-axis motor 202 is started, and its two output ends drive the connecting rod 1 203 to rotate. The connecting rod 1 203 is supported by the support block 204, and drives the connecting rod 2 205 to rotate, thereby rotating the bevel gear 1 206. The meshing transmission of the bevel gear 1 206 and the bevel gear 2 207 drives the screw 208 to rotate. The rotation of the screw 208 causes the moving cylinder 209 to move up and down along the supporting cylinder 2010, thereby driving the support plate 201 to rise and fall. During the lifting process of the support plate 201, the auxiliary support assembly plays a role. When the support plate 201 moves, the relative angle between the connecting rod 1 2011 and the connecting rod 2 2012 changes. Through the sliding block 1 2014 sliding in the fixed shell 1 2013 and the sliding block 2 2016 sliding in the fixed shell 2 2015, the auxiliary support of the support plate 201 is realized to ensure the stability of its lifting process. By adjusting the height of the support plate 201, the guide mechanism 3 and the fixing mechanism 4 can change their own heights accordingly according to the adjustment height of the slot mechanism 7, ensuring that during the entire bending process, the metal structure can be maintained in a suitable processing position at each stage from entering the device to completing the bending, avoiding processing errors caused by height differences and effectively improving the bending accuracy.

[0048] Subsequently, the metal structure to be bent passes between the two guide plates 305 on the side close to the heating mechanism 8. The guide plate 305 slides on the guide rod 303, and the spring 1 304 is compressed or stretched, so that the guide plate 305 can be adaptively adjusted according to the position and pressure of the metal structure. At the same time, the metal structure moves on the guide roller 307, so that the guide roller 307 rotates under the support of the support rod 306, further guiding the movement direction of the metal structure to ensure the correct direction of the metal structure during the bending process.

[0049] Then, the part to be bent is moved to the bottom of the flame burning head 808, and then valve 1 803 and valve 2 806 are opened. The gas in the gas storage box 801 passes through the gas outlet pipe 1 802, the gas distribution pipe 804, the gas outlet pipe 2 805 and the connecting pipe 807, and then the flame is ejected from the flame burning head 808. By controlling the opening of valve 1 803 and valve 2 806, the gas flow rate and the flame size can be adjusted, and the part of the metal structure to be bent can be heated to reduce the hardness and strength of the material, improve its plasticity, and facilitate the subsequent bending operation.

[0050] When the heating is completed, one end of the metal structure is moved to another guide mechanism 3 so that one end is located between the two clamping plates 404. At this time, the turntable 403 is rotated to drive the bidirectional threaded rod 402 to rotate. Since the two clamping plates 404 are threadedly connected to the bidirectional threaded rod 402 and are restricted by the roller 405, the rotation of the bidirectional threaded rod 402 causes the two clamping plates 404 to move toward or away from each other, thereby clamping or loosening the metal structure so as to fix the metal structure during the bending process.

[0051] After the front and rear ends of the metal structure are fixed, the metal structure that needs to be bent is placed on the bending groove plate 7010, and the cylinder 601 is started to push the connecting block 603 downward. The connecting block 603 drives the bending block 602 downward to bend the part of the metal structure that needs to be bent that is moved to the bending groove plate 7010.

[0052] The driving motor 702 is started to drive the transmission rod 703 to rotate, and the worm 704 on the transmission rod 703 rotates accordingly. The meshing transmission of the worm 704 and the worm wheel 705 causes the two-way threaded rod 707 to rotate. The rotation of the two-way threaded rod 707 causes the two moving sleeves 708 to move toward or away from each other. The moving sleeve 708 drives the bending groove plate 7010 to move through the rotating rod 709, changing the spacing between the two bending groove plates 7010 and the bending groove block 706, thereby adapting to the bending requirements of metal structures of different sizes and shapes, and providing a suitable slot for the bending of metal structures.

[0053] When the bending block 602 needs to be installed, first align the assembly block 604 of the bending block 602 with the through hole of the connecting block 603. Insert the assembly block 604 into the through hole of the connecting block 603 so that the two are initially matched. At this time, the locking plate 6010 is in a rotatable state, and its outer side corresponds to the position of the groove of the assembly block 604. Rotate the locking plate 6010 so that its outer side is inserted into the groove of the assembly block 604, and the bending block 602 is initially fixed, limiting the movement of the bending block 602 in the horizontal direction, and ensuring that the relative position between it and the connecting block 603 is stable in the initial installation state.

[0054] When the locking plate 6010 is inserted into the groove of the assembly block 604, the spring 2 609 in the reinforcement assembly is in a compressed state, which generates elastic force on the movable plate 606. Under the action of the elastic force, the movable plate 606 drives the insertion rod 607 to move toward the groove of the locking plate 6010, so that the insertion rod 607 is inserted into the groove of the locking plate 6010. Through the cooperation between the insertion rod 607 and the groove of the locking plate 6010, the connection between the bending block 602 and the connecting block 603 is further reinforced, preventing the locking plate 6010 from accidentally loosening, ensuring that the bending block 602 is stably connected to the cylinder 601 during the bending operation, thereby ensuring the accuracy and stability of the bending action.

[0055] When it is necessary to disassemble the bending block 602, first pull the pull rod 608, and the pull rod 608 drives the movable plate 606 to overcome the elastic force of the spring 2 609 and move in the direction away from the locking plate 6010. The movement of the movable plate 606 causes the insertion rod 607 to be pulled out of the groove of the locking plate 6010, thereby releasing the locking of the locking plate 6010 by the reinforcement assembly. After the insertion rod 607 is pulled out, the locking plate 6010 is rotated so that its outer side is disengaged from the groove of the assembly block 604. At this time, the bending block 602 is no longer restricted by the locking plate 6010 in the horizontal direction. By moving the bending block 602, the assembly block 604 is pulled out of the through hole of the connecting block 603, and the disassembly of the bending block 602 is completed. In this way, the bending block 602 can be easily replaced or repaired.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bending device for metal structure manufacturing, comprising a workbench (1), characterized in that: Adaptation mechanisms (2) are provided on both sides of the top of the workbench (1); a guide mechanism (3) is provided on one side of the top of the adaptation mechanism (2); a fixing mechanism (4) is provided on the other side of the top of the adaptation mechanism (2); a support frame (5) is fixedly connected to the middle section of the top of the workbench (1); a bending mechanism (6) is provided on one side of the bottom of the support frame (5); a heating mechanism (8) is provided on the other side of the bottom of the support frame (5); and a slot mechanism (7) is provided on one side of the top of the workbench (1) close to one of the adaptation mechanisms (2); The adapting mechanism (2) comprises a support plate (201) and a dual-axis motor (202), the bottom of the dual-axis motor (202) being fixedly connected to the top of the workbench (1), the two output ends of the dual-axis motor (202) being fixedly connected to a connecting rod 1 (203), the outer rotation of the connecting rod 1 (203) being connected to a supporting block (204), the bottom of the supporting block (204) being fixedly connected to the workbench (1), the ends of the connecting rod 1 (203) being away from each other being fixedly connected to a connecting rod 2 (205), one end of the connecting rod 2 (205) being fixedly connected to a bevel gear 1 (206), the workbench The top of (1) is fixedly connected to two support cylinders (2010), the inner wall of the support cylinder (2010) is slidably connected to a moving cylinder (209), the top of the moving cylinder (209) is fixedly connected to the bottom of the support plate (201), the inner wall of the moving cylinder (209) is threadedly connected to a screw rod (208), the bottom end of the screw rod (208) is fixedly connected to a bevel gear 2 (207), the bevel gear 1 (206) is meshingly connected to the bevel gear 2 (207), and auxiliary support components are arranged on both sides of the bottom of the support plate (201), and the auxiliary support components are used to provide auxiliary support to the support plate (201).

2. The bending device for metal structure manufacturing according to claim 1, characterized in that: The auxiliary support assembly comprises a connecting rod 1 (2011) and a connecting rod 2 (2012), wherein the connecting rod 1 (2011) and the connecting rod 2 (2012) are connected via a rotating shaft, one end of the connecting rod 1 (2011) is rotatably connected to the top of the workbench (1), and one end of the connecting rod 2 (2012) is rotatably connected to a bottom corner of the support plate (201), and the top of the workbench (1) is fixedly connected to a fixed shell 1 (2013). The inner wall of the fixed shell 1 (2013) is slidably connected to a slider 1 (2014), the other end of the connecting rod 2 (2012) is rotatably connected to the outer side of the slider 1 (2014), the bottom side of the support plate (201) is fixedly connected to a fixed shell 2 (2015), the inner wall of the fixed shell 2 (2015) is slidably connected to a slider 2 (2016), and the other end of the connecting rod 1 (2011) is rotatably connected to the outer side of the slider 2 (2016).

3. The bending device for metal structure manufacturing according to claim 1, characterized in that: The guide mechanism (3) comprises a connecting plate (301), the bottom of the connecting plate (301) is fixedly connected to one side of the top of the support plate (201), both sides of the top of the connecting plate (301) are fixedly connected to the connecting plate (302), a guide rod (303) is slidably connected to the internal through hole of the connecting plate (302), a spring (304) is sleeved on the outside of the guide rod (303), the opposite ends of the two guide rods (303) are fixedly connected to the guide plate (305), and the two ends of the spring (304) are arranged between the connecting plate (302) and the guide plate (305).

4. The bending device for metal structure manufacturing according to claim 3, characterized in that: A guide roller (307) is provided between the two guide plates (305), and both sides of the outside of the guide roller (307) are rotatably connected to support rods (306), and the bottom of the support rod (306) is fixedly connected to the top of the connecting plate (301).

5. The bending device for metal structure manufacturing according to claim 1, characterized in that: The fixing mechanism (4) comprises a fixing plate (401), the bottoms of the two fixing plates (401) are fixedly connected to the top of the support plate (201), the inner wall of the fixing plate (401) is rotatably connected to a bidirectional threaded rod (402), one end of the bidirectional threaded rod (402) is fixedly connected to a turntable (403), the outer threads of the bidirectional threaded rod (402) are connected to two clamping plates (404), a roller (405) is rotatably connected between the two fixing plates (401), and the outer portion of the roller (405) is slidably connected to the inner through hole of the clamping plate (404).

6. The bending device for metal structure manufacturing according to claim 1, characterized in that: The bending mechanism (6) comprises a cylinder (601) and a bending block (602), wherein the cylinder (601) is mounted on one side of the top of the support frame (5), and the cylinder (601) and the bending block (602) are connected via a fixing component, wherein the fixing component comprises a connecting block (603) and an assembling block (604), wherein the top of the connecting block (603) is fixedly connected to the output end of the cylinder (601), and the bottom of the assembling block (604) is fixedly connected to the top of the bending block (602), and the outer side of the assembling block (604) is plugged into and matched with the through hole of the connecting block (603), and a locking plate (6010) is rotatably connected to one side of the outer side of the connecting block (603), and the outer side of the locking plate (6010) is plugged into and matched with the groove of the assembling block (604), and a reinforcing component is arranged on the outer side of the connecting block (603), and the reinforcing component is used for reinforcing the bending block (602) when it is fixed.

7. The bending device for metal structure manufacturing according to claim 6, characterized in that: The reinforcement component includes a mounting shell (605), the outer side of the mounting shell (605) is fixedly connected to the outer side of the connecting block (603), the inner wall of the mounting shell (605) is slidably connected to a movable plate (606), one end of the movable plate (606) is fixedly connected to an insertion rod (607), one end of the insertion rod (607) is plugged into a groove of a locking plate (6010), the other end of the movable plate (606) is fixedly connected to a pull rod (608), the outer side of the pull rod (608) is provided with a spring 2 (609), one end of the spring 2 (609) is fixedly connected to the other side of the movable plate (606), and the other end of the spring 2 (609) is fixedly connected to the inner wall of the mounting shell (605).

8. The bending device for metal structure manufacturing according to claim 1, characterized in that: The slot mechanism (7) comprises a connecting platform (701), the bottom of the connecting platform (701) is fixed to the top of the workbench (1), a driving motor (702) is installed on the outside of the connecting platform (701), the output end of the driving motor (702) is fixedly connected to a transmission rod (703), the outside of the transmission rod (703) is fixedly connected to two worms (704), the outside of the worms (704) is meshingly connected to a worm wheel (705), and the outside of the worm wheel (705) is The side is fixedly connected with a second bidirectional threaded rod (707), the external threads of the second bidirectional threaded rod (707) are connected with two movable sleeves (708), the top of the movable sleeve (708) is rotatably connected with a rotating rod (709), one end of the rotating rod (709) is rotatably connected with a bending groove plate (7010), a bending groove block (706) is arranged between the two bending groove plates (7010), and the bottom of the bending groove block (706) is fixedly connected to the top of the connecting platform (701).

9. The bending device for metal structure manufacturing according to claim 1, characterized in that: The heating mechanism (8) comprises an air storage box (801), the air storage box (801) is fixedly connected to one side of the top of the support frame (5), the outer side of the air storage box (801) is connected to an air outlet pipe (802), one end of the air outlet pipe (802) is fixedly connected to an air distribution pipe (804), the outer side of the air distribution pipe (804) is connected to a plurality of air outlet pipes (805), one end of the air outlet pipe (805) is fixedly connected to a connecting pipe (807), the bottom of the connecting pipe (807) is fixedly connected to a flame burning head (808), the outer side of the air outlet pipe (802) is provided with a valve (803), and the outer side of the air outlet pipe (805) is provided with a valve (806).

10. The bending device for metal structure manufacturing according to claim 9, characterized in that: Both sides of the outside of the gas distribution pipe (804) are fixedly connected to a fixing frame 1 (809), and the top of the fixing frame 1 (809) is fixedly connected to the bottom of the support frame (5). Both sides of the outside of each of the connecting pipes (807) are fixedly connected to a fixing frame 2 (8010), and the top of the fixing frame 2 (8010) is fixedly connected to the bottom of the support frame (5).