Material conveyor with adjustable conveying length

Abstract

The utility model belongs to the technical field of conveyors, and particularly relates to a conveying-length-adjustable material conveyor which comprises a first mounting frame and a second mounting frame, driving rollers and first auxiliary supporting rollers are rotationally arranged on the inner sides of the first mounting frame and the second mounting frame, and tensioning roller mechanisms are arranged on the inner sides of the first mounting frame and the second mounting frame. A conveying belt is wound on the outer sides of the driving roller, the first auxiliary supporting roller and the tensioning roller mechanism, a reinforcing telescopic mechanism is connected between the first mounting frame and the second mounting frame, and auxiliary supporting devices are further arranged on the inner sides of the first mounting frame and the second mounting frame. The auxiliary supporting device comprises a fixed supporting plate and a mounting seat, the fixed supporting plate and the mounting seat are fixedly arranged on the inner side of the first mounting frame and the inner side of the second mounting frame, and a telescopic support set is arranged at the top of the mounting seat. The problem that the middle section of the conveying face of the conveying belt lacks support in the comparison technical scheme is effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of conveyor technology, and specifically relates to a material conveyor with adjustable conveying length. Background Technology

[0002] When processing metal sheets using machines such as fiber laser cutting machines, shearing machines, and bending machines, belt conveyors are often required to transport the sheets. In order to adapt to different material conveying needs and site requirements, length-adjustable material conveyors with telescopic functions are needed.

[0003] Chinese utility model patent CN209601390U discloses an adjustable-length belt conveyor, which "adopts a scissor mechanism and a floating roller system, and the distance between the driving roller and the driven roller of the device can be adjusted within a large range, which can conveniently convey items scattered over a large area." However, the middle section of the conveyor belt located on the top conveying surface lacks support, which requires this part of the conveyor belt to withstand high downward pressure, resulting in reduced structural stability and lifespan of the conveyor belt, thus affecting the reliability of the conveyor belt. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a material conveyor with adjustable conveying length. The bottom of the conveyor belt can be effectively supported by the second auxiliary support roller, and the fixed support plate and telescopic plate of this device always maintain support for the rollers, thereby improving the overall structural strength of the telescopic support group and effectively solving the problem of lack of support in the middle section of the conveying surface of the conveyor belt in the comparative technical solutions.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a material conveyor with adjustable conveying length, comprising a first mounting frame and a second mounting frame. Both the first and second mounting frames have a drive roller and a first auxiliary support roller rotatably mounted on their inner sides. Both the first and second mounting frames also have a tension roller mechanism on their inner sides. A conveyor belt is wound around the outer sides of the drive roller, the first auxiliary support roller, and the tension roller mechanism. A reinforcing telescopic mechanism connects the first and second mounting frames. The inner sides of both the first and second mounting frames also have auxiliary supports. The device, the auxiliary support device includes a fixed support plate and a mounting base fixedly installed inside the first mounting frame and the second mounting frame. The top of the mounting base is provided with a telescopic bracket group. The telescopic bracket group includes multiple sets of continuously arranged C-shaped brackets. The inner side of the C-shaped bracket is provided with a second auxiliary support roller. The side plate of the C-shaped bracket is provided with a sliding groove. Both sides of the C-shaped bracket are provided with fixed pins. A sliding lifting shaft is slidably inserted into the inner side of the sliding groove. A first rotating arm and a second rotating arm are connected between two adjacent sets of C-shaped brackets through the fixed pins and the sliding lifting shaft.

[0006] The beneficial effects of this utility model are as follows: While the spacing between the first and second mounting brackets is adjusted, the mounting base moves accordingly, pulling the C-shaped brackets fixed to the mounting bases at both ends of the telescopic bracket assembly. The traction of these two sets of C-shaped brackets drives the first and second rotating arms between adjacent sets of C-shaped brackets to rotate, forming an extension or folding action. As the first and second rotating arms rotate, their bottoms rise and fall along the slide groove via sliding lifting shafts, ensuring the success of the extension and folding actions. Furthermore, each set of first and second rotating arms rotates synchronously, allowing each set of C-shaped brackets to move forward and backward under the drive of the first and second rotating arms. The displacement between rows ensures that the C-shaped bracket and the second auxiliary support roller remain evenly distributed. The second auxiliary support roller effectively supports the bottom of the conveyor belt. The bottom of the C-shaped bracket is equipped with rollers. During the adjustment process of this device, the auxiliary support device also extends and retracts. The two sets of fixed support plates move synchronously with the movement of the first mounting frame and the second mounting frame. At the same time, the telescopic groove and telescopic plate extend and retract with the displacement of the fixed support plate, so that the fixed support plate and telescopic plate always maintain support for the rollers, thereby improving the overall structural strength of the telescopic bracket group and effectively solving the problem of lack of support in the middle section of the conveyor surface in the comparative technical solution.

[0007] While the spacing between the first and second mounting brackets is adjusted, the telescopic guide rail is also displaced. As the telescopic guide rail moves, the relative position between the telescopic rod and the telescopic guide rail also changes. This allows the overall structural length formed by the telescopic guide rail and the telescopic rod to be adjusted as the first and second mounting brackets move. The maximum extension length of the telescopic rod is limited by the limiting groove and anti-detachment plate. The telescopic guide rail and the telescopic rod reinforce the first and second mounting brackets, improving the overall structural stability of the device. After adjustment, the locking screw is turned by the foot lever to tighten it, thereby locking the telescopic rod and completing the fixation between the first and second mounting brackets.

[0008] To facilitate the movement of the first and second mounting brackets:

[0009] As a further improvement to the above technical solution: both the first mounting bracket and the second mounting bracket are equipped with wheels at the bottom.

[0010] The beneficial effects of this improvement are: the wheels facilitate the movement of the first mounting frame and the second mounting frame.

[0011] To maintain the tension of the conveyor belt:

[0012] As a further improvement to the above technical solution: the tensioning roller mechanism includes a tensioning guide rail installed inside the first mounting frame and the second mounting frame. A slider is slidably installed on the inner side of the tensioning guide rail. One side of the slider is rotatably connected to the tensioning roller. The tensioning roller provides tension support for the conveyor belt.

[0013] The beneficial effects of this improvement are as follows: under the action of gravity, no matter how long the conveyor belt is above the two sets of active rollers of this device, the tensioning roller can maintain the tension effect on the conveyor belt, and can adaptively rise and fall along the tensioning guide as the conveyor belt is pulled or released, thus maintaining the tension effect on the conveyor belt.

[0014] To improve the overall structural strength of the telescopic support assembly:

[0015] As a further improvement to the above technical solution: one set of fixed support plates has an expansion groove on its inner side, and another set of fixed support plates has an expansion plate installed at one end, with the expansion groove and the expansion plate being inserted and connected.

[0016] The beneficial effects of this improvement are as follows: During the adjustment process of this device, the auxiliary support device also extends and retracts accordingly. The two sets of fixed support plates move synchronously with the movement of the first mounting frame and the second mounting frame. At the same time, the telescopic groove and telescopic plate extend and retract with the displacement of the fixed support plate, so that the fixed support plate and telescopic plate always maintain support for the roller, thereby improving the overall structural strength of the telescopic support group.

[0017] To support the U-shaped support:

[0018] As a further improvement to the above technical solution: except for the C-shaped bracket located above the mounting base, each group of C-shaped brackets has a roller mounting groove through its base plate, and a roller is provided on the inner side of the roller mounting groove. The bottom of the roller is in contact with the fixed support plate and the telescopic plate.

[0019] The beneficial effects of this improvement are: the rollers can maintain contact with the fixed support plate and the telescopic plate during the movement of the C-shaped bracket, and the contact between the rollers and the fixed support plate and the telescopic plate plays a supporting role for the C-shaped bracket.

[0020] To improve the overall structural stability of this device:

[0021] As a further improvement to the above technical solution: the enhanced telescopic mechanism includes a telescopic guide rail disposed on the inner side wall of the first mounting frame and the second mounting frame, a telescopic rod slidably inserted into the inner side of the telescopic guide rail, a limiting groove penetrating through the top of the telescopic guide rail, and an anti-detachment plate disposed at the top of the telescopic rod.

[0022] The beneficial effects of this improvement are as follows: while the spacing between the first and second mounting frames is adjusted, the telescopic guide rail is also displaced. As the telescopic guide rail is displaced, the relative position between the telescopic rod and the telescopic guide rail also changes, so that the overall structural length formed by the telescopic guide rail and the telescopic rod can be adjusted with the movement of the first and second mounting frames. The maximum extension length of the telescopic rod is limited by the limiting groove and the anti-detachment plate. The telescopic guide rail and the telescopic rod reinforce the first and second mounting frames, thereby improving the overall structural stability of the device.

[0023] To lock and unlock the telescopic rod and the telescopic guide rail:

[0024] As a further improvement to the above technical solution: the side plates of the first mounting bracket, the second mounting bracket, and the side plate of the telescopic guide rail are all provided with threaded holes, and locking screws are installed on the inner threads of the threaded holes, and a foot pedal lever is provided at one end of the locking screws.

[0025] The beneficial effects of this improvement are: stepping on the foot pedal lever drives the locking screw to rotate and loosen or tighten it, thereby releasing the lock between the telescopic rod and the telescopic guide rail, or locking the telescopic rod and the telescopic guide rail.

[0026] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0028] Figure 2 This is an isometric view of the present invention without showing the conveyor belt;

[0029] Figure 3 This is a partial isometric view of the present invention;

[0030] Figure 4 This is a schematic diagram of the installation of the auxiliary support device in this utility model;

[0031] Figure 5 This is a structural schematic diagram of the present invention from a partial upward viewing angle;

[0032] Figure 6 This is a schematic diagram of the back structure of the first mounting bracket and the second mounting bracket in this utility model;

[0033] Figure 7 This is a partial isometric structural diagram of the first mounting bracket, the second mounting bracket, and the reinforcing telescopic mechanism in this utility model;

[0034] Figure 8 This is a schematic diagram of the telescopic support assembly in this utility model;

[0035] Figure 9 This is a top sectional view of the first mounting bracket, the second mounting bracket, and the reinforcing telescopic mechanism in this utility model;

[0036] Figure 10 This is a schematic diagram of the structure of the fixed support plate in this utility model;

[0037] In the diagram: 1. First mounting frame; 2. Second mounting frame; 3. Traveling wheel; 4. Drive roller; 5. First auxiliary support roller; 6. Tensioning guide rail; 7. Slider; 8. Tensioning roller; 9. Conveyor belt; 10. Reinforced telescopic mechanism; 11. Telescopic guide rail; 12. Telescopic rod; 13. Limiting groove; 14. Anti-detachment plate; 15. Auxiliary support device; 16. Fixed support plate; 17. Telescopic groove; 18. Telescopic plate; 19. Mounting seat; 20. C-shaped bracket; 21. Second auxiliary support roller; 22. Slide groove; 23. Fixed pin; 24. First rotating arm; 25. Second rotating arm; 26. Sliding lifting shaft; 27. Roller mounting groove; 28. Roller; 29. ​​Screw hole; 30. Locking screw; 31. Foot pedal lever. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0039] like Figure 1-10 As shown, an adjustable-length material conveyor includes a first mounting frame 1 and a second mounting frame 2. A drive roller 4 and a first auxiliary support roller 5 are rotatably mounted on the inner sides of both the first and second mounting frames 1 and 2. A tension roller mechanism is also provided on the inner sides of both the first and second mounting frames 1 and 2. A conveyor belt 9 is wound around the outer sides of the drive roller 4, the first auxiliary support roller 5, and the tension roller mechanism. A reinforcing telescopic mechanism 10 connects the first and second mounting frames 1 and 2. An auxiliary support device 15 is also provided on the inner sides of the first and second mounting frames 1 and 2. The auxiliary support device 15 includes a fixed mounting... The first mounting bracket 1 and the second mounting bracket 2 are equipped with a fixed support plate 16 and a mounting base 19. The top of the mounting base 19 is provided with a telescopic bracket group, which includes multiple sets of continuously arranged C-shaped brackets 20. The inner side of the C-shaped bracket 20 is provided with a second auxiliary support roller 21. The side plate of the C-shaped bracket 20 is provided with a sliding groove 22. Both sides of the C-shaped bracket 20 are provided with fixed pins 23. The inner side of the sliding groove 22 is slidably inserted with a sliding lifting shaft 26. The two adjacent sets of C-shaped brackets 20 are connected by a first rotating arm 24 and a second rotating arm 25 through the fixed pins 23 and the sliding lifting shaft 26.

[0040] While the spacing between the first mounting bracket 1 and the second mounting bracket 2 is adjusted, the mounting base 19 moves accordingly, pulling the C-shaped brackets 20 fixed to the mounting base 19 at both ends of the telescopic bracket assembly. The traction of these two sets of C-shaped brackets 20 drives the first rotating arm 24 and the second rotating arm 25 between adjacent sets of C-shaped brackets 20 to rotate, forming an extension or folding action. As the first rotating arm 24 and the second rotating arm 25 rotate, their bottoms rise and fall along the slide groove 22 via the sliding lifting shaft 26, ensuring the success of the extension and folding actions. Furthermore, each set of first rotating arms 24 and second rotating arms 25 rotates synchronously, allowing each set of C-shaped brackets 20 to be equally spaced through the drive of the first rotating arms 24 and the second rotating arms 25. The movement ensures that the C-shaped bracket 20 and the second auxiliary support roller 21 remain evenly distributed. The second auxiliary support roller 21 effectively supports the bottom of the conveyor belt 9. The bottom of the C-shaped bracket 20 is equipped with rollers 28. During the adjustment process of this device, the auxiliary support device 15 also extends and retracts. The two sets of fixed support plates 16 move synchronously with the movement of the first mounting frame 1 and the second mounting frame 2. At the same time, the telescopic groove 17 and the telescopic plate 18 extend and retract with the displacement of the fixed support plate 16, so that the fixed support plate 16 and the telescopic plate 18 always support the rollers 28, thereby improving the overall structural strength of the telescopic bracket group and effectively solving the problem of lack of support in the middle section of the conveyor surface of the conveyor belt 9 in the comparative technical solution.

[0041] While the spacing between the first mounting bracket 1 and the second mounting bracket 2 is adjusted, the telescopic guide rail 11 is also moved. As the telescopic guide rail 11 moves, the relative position between the telescopic rod 12 and the telescopic guide rail 11 also changes, so that the overall structural length formed by the telescopic guide rail 11 and the telescopic rod 12 can be adjusted with the movement of the first mounting bracket 1 and the second mounting bracket 2. The maximum extension length of the telescopic rod 12 is limited by the limiting groove 13 and the anti-detachment plate 14. The telescopic guide rail 11 and the telescopic rod 12 reinforce the first mounting bracket 1 and the second mounting bracket 2, improving the overall structural stability of the device. After the adjustment is completed, the locking screw 30 is driven to rotate by the foot lever 31 to tighten it, thereby locking the telescopic rod 12 and completing the fixation between the first mounting bracket 1 and the second mounting bracket 2.

[0042] Both the first mounting bracket 1 and the second mounting bracket 2 are equipped with wheels 3 at their bottom.

[0043] The wheels 3 are used to facilitate the movement of the first mounting bracket 1 and the second mounting bracket 2.

[0044] The tensioning roller mechanism includes a tensioning guide rail 6 installed inside the first mounting frame 1 and the second mounting frame 2. A slider 7 is slidably installed on the inner side of the tensioning guide rail 6. One side of the slider 7 is rotatably connected to the tensioning roller 8. The tensioning roller 8 provides tension support for the conveyor belt 9.

[0045] Under the influence of gravity, no matter how long the conveyor belt 9 is above the two sets of drive rollers 4 in this device, the tension roller 8 can maintain the tension effect on the conveyor belt 9, and can adaptively rise and fall along the tension guide rail 6 as the conveyor belt 9 is pulled or released, thus maintaining the tension effect on the conveyor belt 9.

[0046] One set of fixed support plates 16 has an inner telescopic groove 17, and another set of fixed support plates 16 has a telescopic plate 18 installed at one end. The telescopic groove 17 and the telescopic plate 18 are inserted and connected.

[0047] During the adjustment process of this device, the auxiliary support device 15 also extends and retracts accordingly. The two sets of fixed support plates 16 move synchronously with the movement of the first mounting frame 1 and the second mounting frame 2. At the same time, the telescopic groove 17 and the telescopic plate 18 extend and retract with the displacement of the fixed support plate 16, so that the fixed support plate 16 and the telescopic plate 18 always maintain support for the roller 28, thereby improving the overall structural strength of the telescopic bracket group.

[0048] Except for the C-shaped bracket 20 located above the mounting base 19, each set of C-shaped brackets 20 has a roller mounting groove 27 extending through its base plate. The inner side of the roller mounting groove 27 is provided with a roller 28, and the bottom of the roller 28 is in contact with the fixed support plate 16 and the telescopic plate 18.

[0049] During the movement of the U-shaped bracket 20, the roller 28 can maintain contact with the fixed support plate 16 and the telescopic plate 18, and the contact between the roller 28 and the fixed support plate 16 and the telescopic plate 18 plays a supporting role for the U-shaped bracket 20.

[0050] The reinforced telescopic mechanism 10 includes a telescopic guide rail 11 disposed on the inner side wall of the first mounting frame 1 and the second mounting frame 2. A telescopic rod 12 is slidably inserted into the inner side of the telescopic guide rail 11. A limiting groove 13 is provided through the top of the telescopic guide rail 11. An anti-detachment plate 14 is provided at the top of the telescopic rod 12.

[0051] While the spacing between the first mounting frame 1 and the second mounting frame 2 is adjusted, the telescopic guide rail 11 is also moved. As the telescopic guide rail 11 moves, the relative position between the telescopic rod 12 and the telescopic guide rail 11 also changes, so that the overall structural length formed by the telescopic guide rail 11 and the telescopic rod 12 can be adjusted with the movement of the first mounting frame 1 and the second mounting frame 2. The maximum extension length of the telescopic rod 12 is limited by the limiting groove 13 and the anti-detachment plate 14. The telescopic guide rail 11 and the telescopic rod 12 reinforce the first mounting frame 1 and the second mounting frame 2, thereby improving the overall structural stability of the device.

[0052] The first mounting bracket 1, the second mounting bracket 2 and the side plate of the telescopic guide rail 11 are all provided with threaded holes 29. A locking screw 30 is installed on the inner thread of the threaded hole 29. A foot pedal lever 31 is provided at one end of the locking screw 30.

[0053] Stepping on the foot pedal lever 31 rotates the locking screw 30 to loosen or tighten it, thereby releasing the lock between the telescopic rod 12 and the telescopic guide rail 11, or locking the telescopic rod 12 and the telescopic guide rail 11.

[0054] The working principle and usage process of this utility model: When using this device, the distance between the first mounting frame 1 and the second mounting frame 2, i.e., the total length of the device, is adjusted according to usage requirements. During adjustment, the foot pedal lever 31 is used to rotate and loosen the locking screw 30. Then, the first mounting frame 1 or the second mounting frame 2 can be pulled. During this process, as the two active rollers 4 move away from or closer to each other, the conveyor belt 9 is stretched. Under the action of gravity, no matter how long the conveyor belt 9 is above the two sets of active rollers 4, the tension roller 8 can maintain the tensioning effect on the conveyor belt 9. It can also adaptively rise and fall along the tension guide rail 6 as the conveyor belt 9 is stretched or released. The distance between the first mounting frame 1 and the second mounting frame 2 is adjusted. Simultaneously, the mounting base 19 moves, pulling the C-shaped brackets 20 fixed to the mounting base 19 at both ends of the telescopic bracket assembly. The traction of these two sets of C-shaped brackets 20 drives the first rotating arm 24 and second rotating arm 25 between adjacent sets of C-shaped brackets 20 to rotate, forming an extension or folding action. As the first rotating arm 24 and second rotating arm 25 rotate, their bottoms rise and fall along the slide groove 22 via the sliding lifting shaft 26, ensuring the success of the extension and folding actions. Furthermore, each set of first rotating arms 24 and second rotating arms 25 rotates synchronously, allowing each set of C-shaped brackets 20 to achieve equal displacement through the drive of the first rotating arms 24 and second rotating arms 25, ensuring that the C-shaped brackets 20 and the second auxiliary support roller 21 remain evenly aligned. In a uniformly distributed state, the bottom of the conveyor belt 9 can be effectively supported by the second auxiliary support roller 21, solving the problem of lack of support in the middle section of the conveyor surface of the conveyor belt 9 in the comparative technical solution. Furthermore, the bottom of the U-shaped bracket 20 is equipped with rollers 28. During the adjustment process of this device, the auxiliary support device 15 also extends and retracts accordingly. The two sets of fixed support plates 16 move synchronously with the movement of the first mounting frame 1 and the second mounting frame 2. Simultaneously, the telescopic groove 17 and the telescopic plate 18 extend and retract with the displacement of the fixed support plate 16, thereby ensuring that the fixed support plate 16 and the telescopic plate 18 always support the rollers 28, thus improving the overall structural strength of the telescopic bracket assembly. Moreover, while the spacing between the first mounting frame 1 and the second mounting frame 2 is adjusted, the telescopic support is also activated. The guide rail 11 is displaced. As the telescopic guide rail 11 is displaced, the relative position between the telescopic rod 12 and the telescopic guide rail 11 also changes. This allows the overall structural length formed by the telescopic guide rail 11 and the telescopic rod 12 to be adjusted as the first mounting frame 1 and the second mounting frame 2 move. The maximum extension length of the telescopic rod 12 is limited by the limiting groove 13 and the anti-detachment plate 14. The telescopic guide rail 11 and the telescopic rod 12 reinforce the first mounting frame 1 and the second mounting frame 2, improving the overall structural stability of the device. After adjustment, the locking screw 30 is driven to rotate by the foot lever 31 to tighten it, thereby locking the telescopic rod 12 and completing the fixation between the first mounting frame 1 and the second mounting frame 2.

[0055] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A material conveyor with adjustable conveying length, characterized in that: The system includes a first mounting frame (1) and a second mounting frame (2). Both the first mounting frame (1) and the second mounting frame (2) have a rotating drive roller (4) and a first auxiliary support roller (5) on their inner sides. Both the first mounting frame (1) and the second mounting frame (2) also have a tension roller mechanism on their inner sides. A conveyor belt (9) is wound around the outer sides of the drive roller (4), the first auxiliary support roller (5), and the tension roller mechanism. A reinforcing telescopic mechanism (10) connects the first mounting frame (1) and the second mounting frame (2). An auxiliary support device (15) is also provided on the inner sides of the first mounting frame (1) and the second mounting frame (2). The auxiliary support device (15) includes components fixedly mounted on the first mounting frame (1). The second mounting bracket (2) has a fixed support plate (16) and a mounting base (19) on its inner side. The top of the mounting base (19) is provided with a telescopic bracket group. The telescopic bracket group includes multiple sets of continuously arranged C-shaped brackets (20). The inner side of the C-shaped bracket (20) is provided with a second auxiliary support roller (21). The side plate of the C-shaped bracket (20) is provided with a sliding groove (22). Both sides of the C-shaped bracket (20) are provided with fixed pins (23). The inner side of the sliding groove (22) is provided with a sliding lifting shaft (26). The two adjacent sets of C-shaped brackets (20) are connected by a first rotating arm (24) and a second rotating arm (25) through the fixed pins (23) and the sliding lifting shaft (26).

2. The adjustable-length material conveyor according to claim 1, characterized in that: Both the first mounting bracket (1) and the second mounting bracket (2) are equipped with wheels (3) at their bottom.

3. The adjustable-length material conveyor according to claim 1, characterized in that: The tensioning roller mechanism includes a tensioning guide rail (6) installed inside the first mounting frame (1) and the second mounting frame (2). A slider (7) is slidably installed on the inner side of the tensioning guide rail (6). One side of the slider (7) is rotatably connected to the tensioning roller (8). The tensioning roller (8) provides tension support for the conveyor belt (9).

4. The adjustable-length material conveyor according to claim 1, characterized in that: One set of fixed support plates (16) has an inner side provided with a telescopic groove (17), and another set of fixed support plates (16) has a telescopic plate (18) installed at one end. The telescopic groove (17) and the telescopic plate (18) are inserted and connected.

5. The adjustable-length material conveyor according to claim 1, characterized in that: Except for the C-shaped bracket (20) located above the mounting base (19), each set of C-shaped brackets (20) has a roller mounting groove (27) through its base plate. The inner side of the roller mounting groove (27) is provided with a roller (28), and the bottom of the roller (28) is in contact with the fixed support plate (16) and the telescopic plate (18).

6. The adjustable-length material conveyor according to claim 1, characterized in that: The enhanced telescopic mechanism (10) includes a telescopic guide rail (11) disposed on the inner side wall of the first mounting frame (1) and the second mounting frame (2). A telescopic rod (12) is slidably inserted into the inner side of the telescopic guide rail (11). A limiting groove (13) is provided through the top of the telescopic guide rail (11). An anti-detachment plate (14) is provided at the top of the telescopic rod (12).

7. The adjustable-length material conveyor according to claim 1, characterized in that: The first mounting bracket (1), the second mounting bracket (2) and the telescopic guide rail (11) are all provided with threaded holes (29). The inner thread of the threaded hole (29) is provided with a locking screw (30). One end of the locking screw (30) is provided with a foot lever (31).

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