Dual layer independent variable speed conveyor belt

Abstract

The application discloses a double-layer independent variable-speed conveying belt and relates to the technical field of conveying belts. The double-layer independent variable-speed conveying belt comprises a frame body, the top of the frame body is provided with a primary conveying belt, a conveying belt frame is arranged on the top of the frame body and is driven by a servo motor, the outer side of the conveying belt frame is provided with a secondary conveying belt, and the side of the primary conveying belt is provided with a power rod used for driving the primary conveying belt. The double-layer independent variable-speed conveying belt can move the protective plates on both sides to the top of the side of the conveying belt frame through the cooperation of the transmission rod one, the sliding groove, the sliding rod, the cross rod, the extrusion block, the spring one and the transmission rod two after angle adjustment of the conveying belt frame and the secondary conveying belt, preliminarily limits the materials on the secondary conveying belt and prevents the materials from falling off.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt technology, specifically to a double-layer independent variable speed conveyor belt. Background Technology

[0002] Conveyor belt systems are widely used in various industrial production lines, playing a crucial role, especially in material handling, sorting, and assembly processes. Traditional conveyor belt equipment mainly relies on a single conveyor layer, using a transmission device to drive the conveyor belt for continuous material transport. However, in actual production processes, due to the differences in the weight, size, shape, and transportation requirements of various materials, traditional single-layer conveyor belts have certain limitations in efficiency and flexibility, especially when handling multiple types of materials, making precise control difficult.

[0003] Chinese patent CN207956785U, authorized and published on October 12, 2018, discloses a double-layer independent variable speed conveyor belt, which includes a frame, with a primary conveyor belt and a secondary conveyor belt respectively on both sides of the frame. The primary conveyor belt is set on a first conveyor belt frame, which is rotatably connected to the frame. The bottom of the secondary conveyor belt is provided with a conveyor belt lifting assembly fixed on the frame, and the lifting mechanism controls the horizontal position of the secondary conveyor belt.

[0004] The aforementioned application document describes the use of a rotatable double-layer conveyor belt to adjust the bending angle between the primary and secondary conveyor belts. However, after adjusting the conveyor belt angle, there is a possibility that the goods being transported on the conveyor belt may fall off the side of the conveyor belt, thus affecting the use of the device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a double-layer independent variable speed conveyor belt, solving the problems mentioned in the background section. To achieve the above objectives, this invention provides the following technical solution: a double-layer independent variable speed conveyor belt, comprising: The frame, the top of which is equipped with a primary conveyor belt; A conveyor belt frame is mounted on the top of the frame and driven by a servo motor. A secondary conveyor belt is mounted on the outer side of the conveyor belt frame, and a power rod for driving the primary conveyor belt is mounted on the side of the primary conveyor belt. A transmission rod is fixedly connected to the bottom of the conveyor belt frame. A transmission rod is connected to the bottom of the conveyor belt frame via a spring. A transmission component for transmission is assembled between the transmission rod and the transmission rod. A protective plate is fixedly connected to the top of the transmission rod. A limiting component is assembled on the side of the conveyor belt frame. An auxiliary limiting component is assembled on the top of the frame.

[0006] Preferably, the transmission component includes a sliding groove formed at the top of the frame, a sliding rod slidably connected inside the sliding groove, a crossbar fixedly connected to the top of the sliding rod, and a pressing block fixedly connected to the top of the crossbar. With this device, after adjusting the angle of the conveyor belt frame and the secondary conveyor belt, regardless of whether the adjustment is clockwise or counterclockwise, the protective plates on both sides can be moved to the top position of the side of the conveyor belt frame, initially restricting the material on the secondary conveyor belt and preventing material from falling off.

[0007] Preferably, the crossbar is located at the bottom of the second transmission rod and is in contact with the second transmission rod.

[0008] Preferably, the extrusion blocks are provided in two sets, with two extrusion blocks in each set, and the two extrusion blocks are symmetrically distributed about the transmission rod.

[0009] Preferably, the limiting component includes a hydraulic chamber 1 fixed to the side of the protective plate. One end of the hydraulic chamber 1 is slidably connected to a force-bearing rod 2 via a piston, and the other end of the hydraulic chamber 1 is slidably connected to a transmission rod 3 via a piston. A spring 2 is fitted to the bottom of the force-bearing rod 2. The hydraulic chamber 2 is fitted to the outside of the power rod. A movable plate is slidably connected to the inside of the hydraulic chamber 2 via a piston. An elastic telescopic rod is fitted to the side of the movable plate. A compression arc rod is slidably connected to the side of the hydraulic chamber 2 via a piston. A limiting rod is fitted to the side of the transmission rod 3. By setting up the limiting component, the limiting rods on both sides can move a certain distance towards the central axis of the secondary conveyor belt, further limiting the material on the secondary conveyor belt and further preventing material from falling off.

[0010] Preferably, the end of the second spring away from the second force-bearing rod is mounted on the inner wall of the first hydraulic chamber.

[0011] Preferably, the end of the elastic telescopic rod away from the movable plate is fitted onto the inner wall of the hydraulic chamber two.

[0012] Preferably, the auxiliary limiting component includes rotating rods fixed to the two sides of the hydraulic chamber. A sprocket is fixedly connected to the outer side of the rotating rod, and a chain is mounted on the outer side of the sprocket. A reciprocating screw is rotatably connected to the top of the frame, and a second sprocket is fixedly connected to the outer side of the reciprocating screw. A movable seat is threadedly connected to the outer side of the reciprocating screw, and a limiting plate is mounted on the top of the movable seat. By setting up the auxiliary limiting component, the limiting plates on both sides can move rapidly back and forth in the horizontal direction, thereby separating the material on the primary conveyor belt, preventing material accumulation, and making the device easier to use.

[0013] Preferably, the end of the chain furthest from the first sprocket is fitted to the outer side of the second sprocket.

[0014] Preferably, the movable seat is located at the top of the frame and is in a sliding connection with the frame.

[0015] This invention provides a double-layer independent variable speed conveyor belt. It has the following beneficial effects: (1) The double-layer independent variable speed conveyor belt can adjust the angle of the conveyor belt frame and the secondary conveyor belt. Regardless of whether the adjustment is clockwise or counterclockwise, the protective plates on both sides can be moved to the top of the side of the conveyor belt frame by the transmission rod 1, sliding groove, sliding rod, crossbar, squeezing block, spring 1 and transmission rod 2, so as to initially restrict the material on the secondary conveyor belt and prevent the material from falling.

[0016] (2) When the protective plate moves upward, the double-layer independent variable speed conveyor belt can drive the hydraulic chamber to move upward together. In conjunction with the force rod 2, transmission rod 3, spring 2, hydraulic chamber 2, elastic telescopic rod, moving plate and extrusion arc rod, the limiting rods on both sides can move a certain distance to the central axis of the secondary conveyor belt, further restricting the material on the secondary conveyor belt and further preventing the material from falling.

[0017] (3) When the hydraulic chamber 2 is in a rotating state, the double-layer independent variable speed conveyor belt can drive the rotating rod to rotate quickly. In conjunction with the sprocket 1, chain, reciprocating screw, sprocket 2 and moving seat, the limiting plates on both sides can move back and forth quickly in the horizontal direction, thereby separating the material on the primary conveyor belt, preventing material accumulation, and making the device easier to use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the overall appearance of the present invention; Figure 2 This is a three-dimensional structural diagram of the overall appearance of the present invention from another perspective; Figure 3 This is a three-dimensional structural diagram of some parts of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a three-dimensional structural diagram of the limiting component of the present invention; Figure 6 This is a three-dimensional structural diagram of some parts of the limiting component of the present invention; Figure 7 This is a three-dimensional structural diagram of the auxiliary limiting component of the present invention; Figure 8This is a three-dimensional structural diagram of some parts of the auxiliary limiting component of the present invention.

[0019] In the picture: 100. Frame; 200. Primary conveyor belt; 300. Conveyor belt frame; 400. Secondary conveyor belt; 500. Power rod; 701. Transmission rod one; 702. Sliding chute; 703. Sliding rod; 704. Crossbar; 705. Extrusion block; 706. Spring one; 707. Transmission rod two; 708. Protective plate; 800. Restriction component; 801. Hydraulic chamber one; 802. Force-bearing rod two; 803. Transmission rod three; 804. Spring two; 805. Hydraulic chamber two; 806. Elastic telescopic rod; 807. Moving plate; 808. Compression arc rod; 809. Restriction rod; 900. Auxiliary limiting component; 901. Sprocket 1; 902. Chain; 903. Reciprocating screw; 904. Sprocket 2; 905. Moving seat; 906. Limiting plate; 907. Rotating rod. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1, please refer to Figures 1-4 A double-layer independent variable speed conveyor belt, comprising: The frame 100 is equipped with a primary conveyor belt 200 on its top. The conveyor belt frame 300 is mounted on the top of the frame 100 and is driven by a servo motor. A secondary conveyor belt 400 is mounted on the outside of the conveyor belt frame 300, and a power rod 500 for driving the primary conveyor belt 200 is mounted on the side of the primary conveyor belt 200. A transmission rod 701 is fixedly connected to the bottom of the conveyor belt frame 300. A transmission rod 707 is connected to the bottom of the conveyor belt frame 300 via a spring 706. A transmission component for transmission is assembled between the transmission rod 701 and the transmission rod 707. The transmission component includes a sliding groove 702 formed on the top of the frame 100. A sliding rod 703 is slidably connected inside the sliding groove 702. A crossbar 704 is fixedly connected to the top of the sliding rod 703. The crossbar 704 is located at the bottom of the transmission rod 707 and is in contact with it. When the conveyor belt frame 300 and the secondary conveyor belt 400 rotate clockwise at a certain angle, the conveyor belt frame 300 can drive the transmission rod 701 fixedly connected to it to rotate together, so that the transmission rod 701 drives the crossbar 704 hinged to it to move to the left.

[0027] A pressing block 705 is fixedly connected to the top of the crossbar 704. Two sets of pressing blocks 705 are provided, with two blocks in each set. The two pressing blocks 705 are symmetrically distributed about the transmission rod 707. A protective plate 708 is fixedly connected to the top of the transmission rod 707. When the transmission rod 707 moves upward, it drives the protective plate 708 fixedly connected to it to move upward as well, causing the protective plates 708 on both sides to move to the top side position of the conveyor belt frame 300. When the conveyor belt frame 300 and the secondary conveyor belt 400 rotate counterclockwise at a certain angle, the pressing block 705 on the left moves to the bottom position of the transmission rod 707. Similarly, this also causes the protective plates 708 on both sides to move to the top side position of the conveyor belt frame 300, protecting the material being conveyed on the secondary conveyor belt 400. In this way, whether the conveyor belt frame 300 and the secondary conveyor belt 400 are adjusted by rotating clockwise or counterclockwise, the protective plates 708 on both sides can be moved to the top position of the side of the conveyor belt frame 300, which initially restricts the material on the secondary conveyor belt 400 and prevents the material from falling.

[0028] In use, the material to be conveyed is placed on the primary conveyor belt 200, and the power lever 500 is activated to drive the primary conveyor belt 200 to perform the corresponding conveying operation, thereby transporting the material to the secondary conveyor belt 400 on the conveyor belt frame 300; after adjusting the angle of the conveyor belt frame 300 and the secondary conveyor belt 400, ... Figure 3 and Figure 4 As shown, when the conveyor belt frame 300 and the secondary conveyor belt 400 rotate clockwise at a certain angle, the conveyor belt frame 300 can drive the transmission rod 701 fixedly connected to it to rotate together. This causes the transmission rod 701 to drive the horizontal bar 704 hinged to it to move to the left. The horizontal bar 704, which is moving to the left, can drive the pressing block 705 and the sliding rod 703 fixedly connected to it to move to the left together. This causes the pressing block 705 on the right to move to the bottom position of the transmission rod 707, thereby pressing the transmission rod 707 and driving the transmission rod 707 to move upward. At this time, the transmission rod 707... When the compression spring 706 moves upward, the transmission rod 707, which is in an upward-moving state, can drive the protective plate 708 fixedly connected to it to move upward together, so that the protective plates 708 on both sides move to the top position of the side of the conveyor belt frame 300; when the conveyor belt frame 300 and the secondary conveyor belt 400 rotate counterclockwise at a certain angle, the left-side squeezing block 705 moves to the bottom position of the transmission rod 707, and similarly, the protective plates 708 on both sides can also move to the top position of the side of the conveyor belt frame 300 to protect the material being conveyed on the secondary conveyor belt 400.

[0029] Example 2, please refer to Figures 1-6Based on Embodiment 1, a limiting component 800 is mounted on the side of the conveyor belt frame 300. The limiting component 800 includes a hydraulic chamber 801 fixed to the side of the protective plate 708. When the protective plate 708 moves upward, the hydraulic chamber 801 mounted on its side can move upward together.

[0030] One end of the hydraulic chamber 801 is slidably connected to a force-bearing rod 802 via a piston. When the force-bearing rod 802 moves into the hydraulic chamber 801, it works in conjunction with the hydraulic chamber 801, which is slidably connected to the force-bearing rod 802 via a piston, causing the force-bearing rod 802 to compress the oil originally stored in the hydraulic chamber 801 as it moves downward.

[0031] The other end of the hydraulic chamber 801 is slidably connected to the transmission rod 803 via a piston. When the oil originally stored in the hydraulic chamber 801 is squeezed, the oil flows towards the transmission rod 803, causing the transmission rod 803, which is slidably connected to the hydraulic chamber 801 via a piston, to extend out of the hydraulic chamber 801.

[0032] A spring 804 is fitted at the bottom of the second force-bearing rod 802. The end of the spring 804 away from the second force-bearing rod 802 is fitted onto the inner wall of the first hydraulic chamber 801. A second hydraulic chamber 805 is fitted on the outside of the power rod 500. A movable plate 807 is slidably connected to the inside of the second hydraulic chamber 805 via a piston. An elastic telescopic rod 806 is fitted on the side of the movable plate 807. The end of the elastic telescopic rod 806 away from the movable plate 807 is fitted onto the inner wall of the second hydraulic chamber 805. When the second hydraulic chamber 805 rotates rapidly, the movable plate 807 inside the second hydraulic chamber 805 stretches the elastic telescopic rod 806 under the action of centrifugal force, and moves along the inner wall of the second hydraulic chamber 805.

[0033] A compression arc rod 808 is slidably connected to the side of the hydraulic chamber 2 805 via a piston. When the moving plate 807 moves, it can compress the oil originally stored in the hydraulic chamber 2 805. The oil in the hydraulic chamber 2 805 is compressed and flows towards the side closer to the compression arc rod 808, which drives the compression arc rod 808, which is slidably connected to the hydraulic chamber 2 805 via a piston, to move.

[0034] The transmission rod 803 is equipped with a limiting rod 809 on its side. When the transmission rod 803 moves, it can drive the limiting rod 809 fixedly connected to it to move. The limiting rods 809 on both sides move a certain distance towards the central axis of the secondary conveyor belt 400, which can further restrict the material on the secondary conveyor belt 400 and further prevent the material from falling off.

[0035] In use, based on Embodiment 1, when the protective plate 708 moves upward, it drives the hydraulic chamber 801 mounted on its side to move upward as well. At this time, the force-bearing rod 802, which is slidably connected between the piston and the hydraulic chamber 801, moves to the bottom position of the extrusion arc rod 808, and the force-bearing rod 802 and the extrusion arc rod 808 come into contact with each other. When the primary conveyor belt 200 and the power rod 500 rotate rapidly to quickly convey materials, the rapidly rotating power rod 500 drives the hydraulic chamber 805 mounted on its outer side to rotate rapidly. The moving plate 807 located inside the hydraulic chamber 805 stretches the elastic telescopic rod 806 under the action of centrifugal force and moves along the inner wall of the hydraulic chamber 805. As the moving plate 807 moves, it can squeeze the oil originally stored in the hydraulic chamber 805. The oil in the hydraulic chamber 805 is squeezed and flows towards the side closer to the extrusion arc rod 808, driving the hydraulic chamber 805 to rotate rapidly. The compression arc rod 808, which is connected to the hydraulic cylinder 805 by a piston, moves between 05. At this time, the compression arc rod 808 rotates together with the hydraulic cylinder 805 and extends out of the hydraulic cylinder 805 at the same time. As the compression arc rod 808 moves, it can compress the force rod 802 and drive the force rod 802 to move downward. In conjunction with the hydraulic cylinder 801, which is connected to the force rod 802 by a piston, the force rod 802 compresses the oil originally stored in the hydraulic cylinder 801 during its downward movement. The oil in the hydraulic cylinder 801 is compressed and flows towards the side closer to the transmission rod 803. This causes the transmission rod 803, which is connected to the hydraulic cylinder 801 by a piston, to extend out of the hydraulic cylinder 801. The transmission rod 803, which is in a moving state, can drive the limiting rod 809, which is fixedly connected to it, to move. The limiting rods 809 on both sides move a certain distance towards the central axis of the secondary conveyor belt 400.

[0036] Example 3, please refer to Figures 1-8 Based on Embodiments 1 and 2, an auxiliary limiting component 900 is installed on the top of the frame 100. The auxiliary limiting component 900 includes a rotating rod 907 fixed to the side of the hydraulic chamber 2 805. When the hydraulic chamber 2 805 is rotating, it can drive the rotating rod 907 fixed to the side of the hydraulic chamber 2 805 to rotate quickly.

[0037] A sprocket 901 is fixedly connected to the outer side of the rotating rod 907. When the rotating rod 907 rotates rapidly, it causes the sprocket 901 fixedly connected to it to rotate.

[0038] A chain 902 is mounted on the outer side of sprocket 901. A reciprocating screw 903 is rotatably connected to the top of the frame 100. A second sprocket 904 is fixedly connected to the outer side of the reciprocating screw 903. The end of the chain 902 away from sprocket 901 is mounted on the outer side of sprocket 904. When sprocket 901 rotates, it engages with the chain 902 mounted on the outer side of sprocket 901, causing sprocket 904, which is connected to sprocket 901 via chain 902, to rotate.

[0039] A movable seat 905 is threadedly connected to the outer side of the reciprocating screw 903. The movable seat 905 is located at the top of the frame 100 and is slidably connected to the frame 100. A limiting plate 906 is mounted on the top of the movable seat 905. When the movable seat 905 reciprocates rapidly in the horizontal direction, it can drive the limiting plate 906, which is fixedly connected to it, to move together, separating the material on the primary conveyor belt 200, preventing material accumulation, and making the device easier to use.

[0040] In use, based on Embodiment 1 and Embodiment 2, when the hydraulic chamber 2 805 is rotating, it can drive the rotating rod 907 fixed on the side of the hydraulic chamber 2 805 to rotate rapidly. This causes the rotating rod 907 to drive the sprocket 1 901 fixedly connected to it to rotate. In conjunction with the chain 902 assembled on the outside of the sprocket 1 901, the sprocket 2 904, which is driven by the chain 902 and the sprocket 1 901, to rotate. The rapidly rotating sprocket 2 904 can drive the reciprocating screw 903 fixedly connected to it to rotate rapidly. At the same time, the movable seat 905, which is threadedly assembled on the outside of the reciprocating screw 903, is restricted by the frame 100 slidably connected to it. This causes the reciprocating screw 903 to drive the movable seat 905 to move rapidly back and forth in the horizontal direction during rotation. The movable seat 905, which is in the moving state, can drive the restricting plate 906 fixedly connected to it to move together, thus separating the material located on the primary conveyor belt 200.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A double-layer independent variable speed conveyor belt, characterized in that, include: The frame, the top of which is equipped with a primary conveyor belt; A conveyor belt frame is mounted on the top of the frame and driven by a servo motor. A secondary conveyor belt is mounted on the outer side of the conveyor belt frame, and a power rod for driving the primary conveyor belt is mounted on the side of the primary conveyor belt. A transmission rod is fixedly connected to the bottom of the conveyor belt frame. A transmission rod is connected to the bottom of the conveyor belt frame via a spring. A transmission component for transmission is assembled between the transmission rod and the transmission rod. A protective plate is fixedly connected to the top of the transmission rod. A limiting component is assembled on the side of the conveyor belt frame. An auxiliary limiting component is assembled on the top of the frame.

2. The double-layer independent variable speed conveyor belt according to claim 1, characterized in that: The transmission component includes a sliding groove formed on the top of the frame, a sliding rod slidably connected inside the sliding groove, a crossbar fixedly connected to the top of the sliding rod, and a pressing block fixedly connected to the top of the crossbar.

3. A double-layer independent variable speed conveyor belt according to claim 2, characterized in that: The crossbar is located at the bottom of the second transmission rod and is in contact with the second transmission rod.

4. A double-layer independent variable speed conveyor belt according to claim 2, characterized in that: The extrusion blocks are provided in two sets, with two extrusion blocks in each set, and the two extrusion blocks are symmetrically distributed about the transmission rod.

5. A double-layer independent variable speed conveyor belt according to claim 2, characterized in that: The limiting component includes a hydraulic chamber 1 fixed to the side of the protective plate. One end of the hydraulic chamber 1 is slidably connected to a force-bearing rod 2 via a piston. The other end of the hydraulic chamber 1 is slidably connected to a transmission rod 3 via a piston. A spring 2 is fitted at the bottom of the force-bearing rod 2. The hydraulic chamber 2 is fitted to the outside of the power rod. A movable plate is slidably connected to the inside of the hydraulic chamber 2 via a piston. An elastic telescopic rod is fitted to the side of the movable plate. A compression arc rod is slidably connected to the side of the hydraulic chamber 2 via a piston. A limiting rod is fitted to the side of the transmission rod 3.

6. A double-layer independent variable speed conveyor belt according to claim 5, characterized in that: The end of the second spring away from the second force-bearing rod is assembled on the inner wall of the first hydraulic chamber.

7. A double-layer independent variable speed conveyor belt according to claim 5, characterized in that: The end of the elastic telescopic rod away from the moving plate is fitted onto the inner wall of the hydraulic chamber two.

8. A double-layer independent variable speed conveyor belt according to claim 5, characterized in that: The auxiliary limiting component includes a rotating rod fixed to two sides of the hydraulic chamber. A sprocket is fixedly connected to the outer side of the rotating rod. A chain is mounted on the outer side of the sprocket. A reciprocating screw is rotatably connected to the top of the frame. A sprocket is fixedly connected to the outer side of the reciprocating screw. A movable seat is threadedly connected to the outer side of the reciprocating screw. A limiting plate is mounted on the top of the movable seat.

9. A double-layer independent variable speed conveyor belt according to claim 8, characterized in that: The end of the chain furthest from the first sprocket is fitted onto the outer side of the second sprocket.

10. A double-layer independent variable speed conveyor belt according to claim 8, characterized in that: The movable seat is located at the top of the frame and is in a sliding connection with the frame.

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