Photovoltaic support punching machine

Abstract

The utility model relates to the technical field of punching machines, in particular to a photovoltaic support punching machine. Comprising a supporting table and further comprises a fixing frame which is fixedly connected to the upper surface of the supporting table, lifting air cylinders are symmetrically arranged at the bottom of the fixing frame, a lower pressing plate is fixedly connected to the telescopic ends of the two lifting air cylinders, a mounting sleeve is fixedly connected to the bottom of the lower pressing plate, and a connecting disc is fixedly connected to the interior of the mounting sleeve through bolts. Through the arrangement of the mounting assembly, a worker can conveniently disassemble and replace the specification of the lower die, through the arrangement of the fixing assembly, C-shaped steel can be effectively fixed, through the arrangement of the adjusting assembly, the horizontal position of the C-shaped steel can be effectively adjusted and moved, and through the arrangement of the collecting assembly, the C-shaped steel can be conveniently collected. And waste materials can be conveniently collected and treated, and the overall practicability of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of punching machines, and in particular to a photovoltaic bracket punching machine. Background Art

[0002] Solar photovoltaic brackets are special brackets designed for placing, installing and fixing solar panels in solar photovoltaic systems. C-shaped steel is an important component of solar photovoltaic brackets. When punching C-shaped steel, a photovoltaic bracket punching machine is required.

[0003] In the prior art, the lower die inside the punching machine is integrated with the entire device, which results in a punching machine of one specification being able to effectively punch only one specification of C-shaped steel. When punching of different specifications of C-shaped steel is required, punching machines of different specifications need to be used, which not only reduces the punching efficiency of the C-shaped steel, but also increases the production cost of the producer. Moreover, after punching the C-shaped steel, the punching machine in the prior art cannot effectively collect and process the waste generated after punching, thereby reducing the overall practicality of the device.

[0004] Compared with the Chinese patent with publication number CN220762889U, the present utility model relates to the field of photovoltaic bracket technology, and in particular to a photovoltaic bracket punching machine. It includes a frame, the frame is provided with a lower die and an upper die, the lower die is provided with a die hole that matches the shape of the positioning hole on the C-shaped steel, the lower part of the upper die is provided with a punch for cooperating with the die hole, the top of the frame is provided with a lifting device for driving the upper die to rise and fall, unpowered roller conveyors are provided on both sides of the frame, the lower die is provided with a channel that matches the cross-sectional shape of the C-shaped steel, the frame is rotatably connected to a driving wheel on one side of the channel, the driving wheel is connected to the servo motor provided on the frame, the frame is provided with a fixed plate on the other side of the channel, the fixed plate is slidably connected to a pinch wheel, the cylinder fixed on the frame has a piston rod that passes through the fixed plate and is connected to the pinch wheel, and also includes a controller. The hole spacing of the C-shaped steel processed by the utility model is relatively accurate.

[0005] The above solution can very conveniently fix the C-shaped steel, but the lower mold and the device in the above solution are still integrated, and the staff still cannot change the specifications of the lower mold according to the different specifications of the C-shaped steel. Moreover, the above solution still cannot effectively collect and process the waste, and fails to solve the problems raised in the above background technology.

[0006] Therefore, those skilled in the art provide a photovoltaic bracket punching machine to solve the problems raised in the above background technology. Utility Model Content

[0007] The purpose of the utility model is to provide a photovoltaic bracket punching machine, including a support platform and:

[0008] A fixing frame is fixedly connected to the upper surface of the support platform, and a lifting cylinder is symmetrically provided at the bottom of the fixing frame. The telescopic ends of the two lifting cylinders are fixedly connected to a lower pressure plate, and the bottom of the lower pressure plate is fixedly connected to a mounting sleeve. The interior of the mounting sleeve is fixedly connected to a connecting disk by bolts, and the bottom of the connecting disk is fixedly connected to a punching head, and a buffer pad is bonded to the bottom of the connecting disk;

[0009] The lower die is located above the support platform, the interior of the lower die is provided with a movable groove for the C-shaped steel to move, the upper surface of the lower die is provided with a guide groove for the punch head to move, and both sides of the outer wall of the lower die are fixedly connected to the mounting plate through the connecting plate;

[0010] The fixing frames are symmetrically arranged outside the fixing frame, and the interiors of the two fixing frames are provided with guide grooves for the movement of the mounting plate;

[0011] An installation assembly is provided on the upper surface of the fixing frame and is used to fix the fixing frame and the installation plate;

[0012] A fixing assembly is symmetrically arranged above the support platform and is used to fix the C-shaped steel;

[0013] An adjustment component is symmetrically arranged at the bottom of the support platform and is used to move the C-shaped steel;

[0014] The collecting component is displaced below the supporting platform and is used to collect and process the waste generated after punching.

[0015] As a further improvement of the present technical solution, the mounting assembly includes a fixing plate fixedly connected to the upper surface of the fixing frame, the fixing plate having sliding rods symmetrically provided inside, the two ends of the sliding rods being fixedly connected to the inner top and inner bottom ends of the fixing plate respectively, the fixing plate having a resistance plate provided inside, the resistance plate having a guide groove for the movement of the sliding rod, the outsides of the plurality of sliding rods being sleeved with return springs, the return springs being in contact with the contact plate and the fixing plate, the upper surface of the resistance plate being fixedly connected to a pull plate through the upper plate, the bottom of the resistance plate being symmetrically provided with insertion rods, the contact surfaces of the fixing plate and the fixing frame being provided with guide grooves for the movement of the insertion rods, and the upper surface of the mounting plate being provided with guide grooves for the movement of the insertion rods.

[0016] As a further improvement of the present technical solution, the fixing assembly includes T-shaped plates symmetrically arranged above the support platform, and the interiors of the two T-shaped plates are penetrated by threaded holes for the movement of the threaded rod. One end of the threaded rod is fixedly connected to a knob, and the other end of the threaded rod is fixedly connected to a contact plate.

[0017] As a further improvement of the present technical solution, the adjusting assembly includes an adjusting plate symmetrically arranged at the bottom of the support platform, the inner side wall of the adjusting plate is rotatably connected to a screw rod, the other end of the screw rod extends to the outside of the adjusting plate and is fixedly connected to a limit plate, one of the adjusting plates is fixedly connected to the outside of a driving motor, the output shaft of the driving motor is fixedly connected to one end of one of the screw rods through a coupling, the two screw rods are connected by a synchronous belt and a pulley transmission, the external thread of the screw rod is connected to a threaded block, the contact surface of the adjusting plate and the support platform is provided with a guide groove for the movement of the threaded block, and the upper surfaces of the two threaded blocks are respectively fixedly connected to the bottom of the two T-shaped plates.

[0018] As a further improvement of the present technical solution, the front end surface and the rear end surface of the support platform are fixedly connected with scale bars, and the exteriors of the two threaded blocks are fixedly connected with scale pointers through outer plates.

[0019] As a further improvement of the present technical solution, the collection component includes an installation frame symmetrically arranged at the bottom of the support platform, the interior of the two installation frames is provided with an insertion plate, the bottom of the two insertion plates are fixedly connected with an L-shaped plate, a collection frame is fixedly connected between the two L-shaped plates, the interior of the insertion plate is fixedly connected with an inner plate, the outside of the inner plate is symmetrically provided with telescopic rods, the telescopic ends of the multiple telescopic rods are fixedly connected with a fixed rod, the outside of the multiple telescopic rods are each sleeved with a resistance spring, the multiple resistance springs are in resistance between the fixed rod and the inner plate, and the outside of the insertion plate and the installation frame are provided with a guide groove for the movement of the fixed rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In this photovoltaic bracket punching machine, through the provided installation component, fixing component, adjustment component and collection component, when it is necessary to punch the C-shaped steel, it is only necessary to first fix and clamp the C-shaped steel through the fixing component. When the C-shaped steel is fixed, the adjustment component starts to operate. At this time, the adjustment component will drive the C-shaped steel to move synchronously. When one end of the C-shaped steel is inserted into the movable groove inside the lower die, the lifting cylinder starts to operate. At this time, the lifting cylinder will drive the punching head to move synchronously, so that the C-shaped steel can be effectively punched by the punching head. Through the setting of the buffer pad, the downward pressure can be effectively buffered, so that the entire device can be effectively protected. After the C-shaped steel is punched, waste will be generated. At this time, the collection component can effectively collect and process the waste. When the specifications of the lower die need to be changed according to the different specifications of the C-shaped steel, it is only necessary to use the installation component to conveniently disassemble the fixing frame and the mounting plate, so that it is convenient for the staff to replace the lower die, effectively improving the overall practicality of the device, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model after the lower mold is disassembled;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the collection frame after disassembly in the present invention;

[0025] Figure 4 This is a schematic diagram of the cutaway three-dimensional structure of the adjustment plate in the present invention;

[0026] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0027] Figure 6 for Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0028] Figure 7 for Figure 4 Schematic diagram of the enlarged structure of the C area in the middle.

[0029] The meaning of each number in the figure is:

[0030] 1. Support platform; 2. Fixed frame; 3. Lifting cylinder; 4. Lower pressure plate; 5. Lower die; 6. C-shaped steel; 7. T-shaped plate; 8. Knob; 9. Threaded rod; 10. Contact plate; 11. Connecting plate; 12. Mounting plate; 13. Fixed frame; 14. Fixed plate; 15. Mounting sleeve; 16. Connecting plate; 17. Buffer pad; 18. Punch head; 19. Collecting frame; 20. Mounting frame; 21. Adjustment plate; 22. Drive motor; 23. Screw; 24. Threaded block; 25. Limit plate; 26. Synchronous belt; 27. Sliding rod; 28. Contact plate; 29. ​​Reset spring; 30. Upper plate; 31. Insert rod; 32. Insert plate; 33. Inner plate; 34. Telescopic rod; 35. Fixed rod; 36. Contact spring; 37. L-shaped plate; 38. Scale bar; 39. Outer plate; 40. Scale pointer. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1 - Figure 7 As shown, this embodiment provides a photovoltaic bracket punching machine, including a support platform 1, and also includes:

[0033] The fixing frame 2 is fixedly connected to the upper surface of the support platform 1. The bottom of the fixing frame 2 is symmetrically provided with lifting cylinders 3. The telescopic ends of the two lifting cylinders 3 are fixedly connected to the lower pressure plate 4. The bottom of the lower pressure plate 4 is fixedly connected to the mounting sleeve 15. The interior of the mounting sleeve 15 is fixedly connected to the connecting plate 16 by bolts. The bottom of the connecting plate 16 is fixedly connected to the punch head 18. The bottom of the connecting plate 16 is bonded with a buffer pad 17.

[0034] The lower die 5 is located above the support platform 1. A movable groove for the C-shaped steel 6 is opened inside the lower die 5. A guide groove for the punch head 18 is opened through the upper surface of the lower die 5. Both sides of the outer wall of the lower die 5 are fixedly connected to the mounting plate 12 through the connecting plate 11.

[0035] The fixing frames 13 are symmetrically arranged outside the fixing frame 2, and the interiors of the two fixing frames 13 are provided with guide grooves for the movement of the mounting plates 12;

[0036] The mounting assembly is provided on the upper surface of the fixing frame 13 and is used to fix the fixing frame 13 and the mounting plate 12;

[0037] The fixing assembly is symmetrically arranged above the support platform 1 and is used to fix the C-shaped steel 6;

[0038] The adjustment component is symmetrically arranged at the bottom of the support platform 1 and is used to move the C-shaped steel 6;

[0039] The collecting component is displaced below the supporting platform 1 and is used to collect and process the waste generated after punching.

[0040] The above working principle: when it is necessary to punch the C-shaped steel 6, it is only necessary to first fix and clamp the C-shaped steel 6 through the fixing assembly. When the C-shaped steel 6 is fixed, the adjusting assembly starts to operate. At this time, the adjusting assembly will drive the C-shaped steel 6 to move synchronously. When one end of the C-shaped steel 6 is inserted into the movable groove inside the lower die 5, the lifting cylinder 3 starts to operate. At this time, the lifting cylinder 3 will drive the punching head 18 to move synchronously, so that the C-shaped steel 6 can be effectively punched by the punching head 18. Through the setting of the buffer pad 17, the downward force can be effectively buffered, thereby effectively protecting the entire device. When the C-shaped steel 6 is punched, waste will be generated. At this time, the collection assembly can effectively collect and process the waste. When the specifications of the lower die 5 need to be replaced according to the different specifications of the C-shaped steel 6, the fixing frame 13 and the mounting plate 12 can be easily disassembled through the installation assembly, so that it is convenient for the staff to replace the lower die 5, effectively improving the overall practicality of the device and saving time and effort.

[0041] In order to effectively fix and install the lower mold 5, the installation component includes a fixing plate 14 fixedly connected to the upper surface of the fixing frame 13, and the interior of the fixing plate 14 is symmetrically provided with sliding rods 27, and the two ends of multiple sliding rods 27 are fixedly connected to the internal top and internal bottom ends of the fixing plate 14 respectively. A contact plate 28 is provided inside the fixing plate 14, and the interior of the contact plate 28 is provided with a guide groove for the movement of the sliding rod 27. The outsides of multiple sliding rods 27 are all sleeved with return springs 29, and multiple return springs 29 all contact between the contact plate 28 and the fixing plate 14. The upper surface of the contact plate 28 is fixedly connected to the pull plate through the upper plate 30, and the bottom of the contact plate 28 is symmetrically provided with an insertion rod 31. The contact surface of the fixing plate 14 and the fixing frame 13 is provided with a guide groove for the movement of the insertion rod 31. The upper surface of the mounting plate 12 is provided with a guide groove for the movement of the insertion rod 31. When the lower mold 5 is fixedly installed, it is only necessary to pull the pull plate first. At this time, the pull plate will drive the upper plate 30 to move synchronously, and the upper plate 30 will drive the contact plate 28 to move synchronously on the outside of the slide bar 27. During the movement of the contact plate 28, the reset spring 29 will be squeezed, and the contact plate 28 will also drive the insertion rod 31 to move synchronously. At this time, the mounting plate 12 is inserted into the inside of the fixed frame 13, and the pull plate is released. At this time, the reset spring 29 is reset, driving the contact plate 28 to move synchronously, and the contact plate 28 drives the insertion rod 31 to move synchronously. When the insertion rod 31 is inserted into the guide groove on the upper surface of the mounting plate 12, the mounting plate 12 and the fixed frame 13 can be fixed. At this time, the lower mold 5 can be fixedly installed, and it can be convenient for the staff to disassemble and replace the lower mold 5, effectively improving the overall practicality of the device.

[0042] Taking into account that the C-shaped steel 6 needs to be fixed first when processing it, the fixing assembly includes T-shaped plates 7 symmetrically arranged above the support platform 1. The interiors of the two T-shaped plates 7 are penetrated by threaded holes for the threaded rod 9 to move. One end of the threaded rod 9 is fixedly connected to a knob 8, and the other end of the threaded rod 9 is fixedly connected to a contact plate 10. When the C-shaped steel 6 needs to be fixed, it is only necessary to turn the knob 8 first. At this time, the knob 8 will drive the threaded rod 9 to move synchronously inside the T-shaped plate 7, and the threaded rod 9 will drive the contact plate 10 to move synchronously. When the contact plate 10 contacts the outside of the C-shaped steel 6, the C-shaped steel 6 can be effectively fixed and clamped by the contact plate 10.

[0043] In order to effectively adjust and move the horizontal position of the C-shaped steel 6, the adjustment component includes an adjustment plate 21 symmetrically arranged at the bottom of the support platform 1. The inner side wall of the adjustment plate 21 is rotatably connected to a screw rod 23. The other end of the screw rod 23 extends to the outside of the adjustment plate 21 and is fixedly connected to a limit plate 25. The outside of one of the adjustment plates 21 is fixedly connected to a drive motor 22. The output shaft of the drive motor 22 is fixedly connected to one end of one of the screw rods 23 through a coupling. The two screw rods 23 are connected by a synchronous belt 26 and a pulley transmission. The external thread of the screw rod 23 is connected to a threaded block 24. The contact surface between the adjustment plate 21 and the support platform 1 is provided with a guide for the movement of the threaded block 24. Toward the groove, the upper surfaces of the two threaded blocks 24 are fixedly connected to the bottoms of the two T-shaped plates 7 respectively. When the C-shaped steel 6 needs to be adjusted and moved, the drive motor 22 starts to run. At this time, the drive motor 22 will drive one of the screw rods 23 to rotate synchronously. Since the two screw rods 23 are connected by a synchronous belt 26 and a pulley for transmission, the two screw rods 23 will rotate synchronously at this time, and the threaded block 24 will move synchronously on the outside of the screw rod 23, driving the T-shaped plate 7 to move synchronously. The T-shaped plate 7 then drives the contact plate 10 and the C-shaped steel 6 to move synchronously. At this time, the C-shaped steel 6 can be moved, thereby facilitating the effective punching of the C-shaped steel 6.

[0044] In order to facilitate the staff to observe the distance moved by the C-shaped steel 6, the front end surface and the rear end surface of the support platform 1 are fixedly connected with a scale bar 38, and the outside of the two threaded blocks 24 are fixedly connected with a scale pointer 40 through the outer plate 39. During the movement of the threaded block 24, the scale pointer 40 will also be driven to move synchronously. At this time, the staff can check the distance moved by the C-shaped steel 6 through the cooperation between the scale pointer 40 and the scale bar 38, which effectively improves the accuracy of the hole spacing gap of the C-shaped steel 6.

[0045] In addition, in order to be able to collect and process the waste materials effectively, the collection assembly includes a mounting frame 20 symmetrically arranged at the bottom of the support platform 1, and the interior of the two mounting frames 20 are provided with plug plates 32, and the bottoms of the two plug plates 32 are fixedly connected with L-shaped plates 37, and the collection frame 19 is fixedly connected between the two L-shaped plates 37. The interior of the plug plates 32 is fixedly connected with the inner plate 33, and the outside of the inner plate 33 is symmetrically provided with telescopic rods 34, and the telescopic ends of the multiple telescopic rods 34 are fixedly connected with the fixed rods 35. The outsides of the multiple telescopic rods 34 are all sleeved with interference springs 36, and the multiple interference springs 36 are all in conflict between the fixed rods 35 and the inner plate 33. The outsides of the plug plates 32 and the mounting frame 20 are provided with a space for the fixed rods 35 to move. When the guide groove is needed to collect and process the waste, it is only necessary to press the fixing rod 35 first. At this time, the fixing rod 35 will simultaneously squeeze the telescopic rod 34 and the resistance spring 36, and then the plug plate 32 will be inserted into the interior of the mounting frame 20. At this time, the plug plate 32 will drive the fixing rod 35 to move synchronously. When the plug plate 32 drives the fixing rod 35 to move into the guide groove outside the mounting frame 20, the resistance spring 36 is reset, driving the fixing rod 35 to move synchronously. When the fixing rod 35 is inserted into the guide groove outside the mounting frame 20, the mounting frame 20 and the plug plate 32 can be fixed. At this time, the collection frame 19 can be installed, so that the waste can be collected and processed through the collection frame 19.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic support punching machine, comprising a support platform (1), characterized in that: Also includes: A fixing frame (2) is fixedly connected to the upper surface of the support platform (1); a lifting cylinder (3) is symmetrically provided at the bottom of the fixing frame (2); the telescopic ends of the two lifting cylinders (3) are fixedly connected to a lower pressure plate (4); the bottom of the lower pressure plate (4) is fixedly connected to a mounting sleeve (15); the interior of the mounting sleeve (15) is fixedly connected to a connecting plate (16) by bolts; the bottom of the connecting plate (16) is fixedly connected to a punching head (18); and a buffer pad (17) is bonded to the bottom of the connecting plate (16); A lower die (5) is located above the support platform (1), a movable groove for the C-shaped steel (6) to move is provided inside the lower die (5), a guide groove for the punch head (18) to move is provided through the upper surface of the lower die (5), and both sides of the outer wall of the lower die (5) are fixedly connected to the mounting plate (12) through the connecting plate (11); A fixing frame (13) is symmetrically arranged outside the fixing frame (2), and a guide groove for the movement of the mounting plate (12) is provided inside the two fixing frames (13); A mounting assembly is provided on the upper surface of the fixing frame (13) and is used to fix the fixing frame (13) and the mounting plate (12); A fixing assembly is symmetrically arranged above the support platform (1) and is used to fix the C-shaped steel (6); An adjustment component is symmetrically arranged at the bottom of the support platform (1) and is used to move the C-shaped steel (6); The collecting component is displaced below the supporting platform (1) and is used to collect and process waste materials generated after punching.

2. A photovoltaic bracket punching machine according to claim 1, characterized in that: The mounting assembly comprises a fixing plate (14) fixedly connected to the upper surface of the fixing frame (13), a plurality of sliding rods (27) are symmetrically provided inside the fixing plate (14), and the two ends of the plurality of sliding rods (27) are fixedly connected to the internal top end and the internal bottom end of the fixing plate (14) respectively, a contact plate (28) is provided inside the fixing plate (14), and a guide groove for the movement of the sliding rods (27) is provided inside the contact plate (28), and the exteriors of the plurality of sliding rods (27) are all sleeved with a plurality of sliding rods (27). A plurality of reset springs (29) are provided, and the plurality of reset springs (29) are in contact between the contact plate (28) and the fixed plate (14). The upper surface of the contact plate (28) is fixedly connected to a pull plate through an upper plate (30). The bottom of the contact plate (28) is symmetrically provided with an insertion rod (31). The contact surfaces of the fixed plate (14) and the fixed frame (13) are provided with a guide groove for the insertion rod (31) to move. The upper surface of the mounting plate (12) is provided with a guide groove for the insertion rod (31) to move.

3. A photovoltaic bracket punching machine according to claim 1, characterized in that: The fixing assembly comprises T-shaped plates (7) symmetrically arranged above the support platform (1), and threaded holes are provided in the interiors of the two T-shaped plates (7) for the threaded rod (9) to move, one end of the threaded rod (9) is fixedly connected to a knob (8), and the other end of the threaded rod (9) is fixedly connected to a contact plate (10).

4. A photovoltaic bracket punching machine according to claim 3, characterized in that: The adjustment assembly comprises an adjustment plate (21) symmetrically arranged at the bottom of the support platform (1), the inner side wall of the adjustment plate (21) is rotatably connected to a screw rod (23), the other end of the screw rod (23) extends to the outside of the adjustment plate (21) and is fixedly connected to a limit plate (25), the outside of one of the adjustment plates (21) is fixedly connected to a drive motor (22), the output shaft of the drive motor (22) is fixedly connected to one end of one of the screw rods (23) through a coupling, the two screw rods (23) are connected by a synchronous belt (26) and a pulley transmission, the external thread of the screw rod (23) is connected to a threaded block (24), the contact surface between the adjustment plate (21) and the support platform (1) is provided with a guide groove for the movement of the threaded block (24), and the upper surfaces of the two threaded blocks (24) are respectively fixedly connected to the bottoms of the two T-shaped plates (7).

5. A photovoltaic bracket punching machine according to claim 4, characterized in that: The front end surface and the rear end surface of the support platform (1) are both fixedly connected with scale bars (38), and the exteriors of the two threaded blocks (24) are both fixedly connected with scale pointers (40) via outer plates (39).

6. A photovoltaic bracket punching machine according to claim 1, characterized in that: The collecting assembly comprises a mounting frame (20) symmetrically arranged at the bottom of the supporting platform (1), two mounting frames (20) are each provided with an inserting plate (32), the bottoms of the two inserting plates (32) are each fixedly connected with an L-shaped plate (37), a collecting frame (19) is fixedly connected between the two L-shaped plates (37), the interior of the inserting plates (32) is fixedly connected with an inner plate (33), the exterior of the inner plate (33) is symmetrically provided with telescopic rods (34), the telescopic ends of the plurality of telescopic rods (34) are each fixedly connected with a fixed rod (35), the exteriors of the plurality of telescopic rods (34) are each sleeved with a resisting spring (36), the plurality of resisting springs (36) are each resisted between the fixed rod (35) and the inner plate (33), and the exteriors of the inserting plates (32) and the mounting frame (20) are each provided with a guide groove for the movement of the fixed rod (35).

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