Replacing trolley for conveying belt

Abstract

The utility model discloses a replacing trolley for a conveying belt, which relates to the field of conveying belts, and has the technical key points that the replacing trolley comprises a trolley body, a first support frame is arranged at the top of the trolley body, two first extension seats are arranged at the top of the first support frame, and a first movable interval is formed between the two first extension seats; a rolling rotating shaft is rotationally connected into the first movable interval, first transmission convex teeth are arranged on the outer portion of the rolling rotating shaft, the rolling rotating shaft is used for rolling the old conveying belt, so that a transmission chain of the old conveying belt is meshed with the first transmission convex teeth, and a second supporting frame is arranged at the top of the vehicle body; and two second extending seats are arranged at the top of the second supporting frame, and a second movable interval is formed between the two second extending seats, so that the technical problem that the risk of scalding is increased due to the fact that the temperature of the conveying belt is high, operators need to make contact with the conveying belt in the high-temperature state for a long time when the conveying belt is pulled is solved.

Description

Technical Field

[0001] This utility model relates to the field of conveyor belts, and in particular to a trolley for changing conveyor belts. Background Technology

[0002] Freshly made glass bottles are typically extremely hot, posing a significant challenge to the materials used in conveyor belts. Since high temperatures can damage, deform, or burn ordinary conveyor belt materials, it is essential to select metal materials capable of withstanding high temperatures. Stainless steel, alloy steel, nickel-based alloys, or other special alloys are commonly used. These metals possess extremely high melting points and excellent thermal stability, allowing them to withstand high temperatures without compromising their physical properties. Compared to traditional rubber or plastic conveyor belts, metal materials can operate at temperatures as high as 800°C or even higher without significant softening or structural damage. To ensure the stability of the conveyor belt, a drive chain is installed beneath it, and drive wheels mesh with the chain on the frame. When the drive wheels rotate, they drive the drive chain, enabling the conveyor belt to move.

[0003] During long-term use, conveyor belts are subjected to continuous friction, stretching, and pressure, leading to material wear and aging. However, due to the high temperature of the conveyor belt, operators need to be in contact with the high-temperature conveyor belt for a long time, which increases the risk of burns. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a conveyor belt replacement trolley, aiming to solve the technical problem that the high temperature of the conveyor belt requires operators to be in contact with it for extended periods, increasing the risk of burns.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A conveyor belt changing trolley includes a trolley body. A first support frame is provided on the top of the trolley body. Two first extension seats are provided on the top of the first support frame, forming a first movable interval between the two first extension seats. A winding shaft is rotatably connected inside the first movable interval. A first transmission tooth is provided on the outside of the winding shaft. The winding shaft is used to wind up an old conveyor belt, causing the drive chain of the old conveyor belt to mesh with the first transmission tooth. A second support frame is provided on the top of the trolley body. Two second extension seats are provided on the top of the second support frame, forming a second movable interval between the two second extension seats. An unwinding shaft is rotatably connected inside the second movable interval. A second transmission tooth is provided on the outside of the unwinding shaft. The unwinding shaft is used to place a new conveyor belt, causing the drive chain of the new conveyor belt to mesh with the second transmission tooth.

[0007] Before replacing the conveyor belt, one end of the old conveyor belt needs to be guided onto the take-up spool so that the drive chain of the old conveyor belt meshes with the first drive tooth. At the same time, the new conveyor belt is already threaded onto the outside of the unwinding spool, and one end of the new conveyor belt is connected to the other end of the old conveyor belt. When the operator rotates the take-up spool, the rotation of the take-up spool causes the old conveyor belt to begin to wind around the take-up spool. Since one end of the new conveyor belt is connected to the other end of the old conveyor belt, the old conveyor belt will drive the new conveyor belt to unwind during the drive winding process, so that the new conveyor belt gradually replaces the position of the old conveyor belt. This completes the disassembly of the old conveyor belt and the installation of the new conveyor belt simultaneously, avoiding the operator's long-term exposure to the high temperature of the old conveyor belt and simplifying the installation method of the new conveyor belt.

[0008] Furthermore, in this application, the first extension seat has a first rotating groove inside, and the first rotating groove has a first stabilizing bearing inside. The two ends of the winding shaft are respectively rotatably connected to the inside of the first stabilizing bearings of the two first extension seats.

[0009] By using a first stabilizing bearing, the winding shaft can rotate smoothly within the first rotating groove of the first extension seat, which helps to reduce friction and resistance when winding up old conveyor belts and improves the smoothness of operation.

[0010] Furthermore, in this application, one end of the winding shaft extends through the adjacent first stabilizing bearing, and one end of the winding shaft is provided with a rotating disk. The rotating disk has a plurality of first locking holes inside, and the first extension seat adjacent to the rotating disk has a second locking hole. A locking pin is inserted into any of the first locking holes, and the locking pin is inserted into the second locking hole.

[0011] When the operator needs to place the old conveyor belt outside the winding shaft, in order to prevent the winding shaft from rotating, the locking pin passes through the first locking hole and is inserted into the second locking hole, thereby locking the position of the rotating turntable and preventing the winding shaft from rotating; and the design of the rotating turntable allows the operator to easily wind up the shaft, thus facilitating the winding of the old conveyor belt.

[0012] Furthermore, in this application, the outer side of the winding shaft is provided with two limiting plates, which are spaced apart to form a limiting interval, so that the old conveyor belt is located inside the limiting interval.

[0013] Furthermore, in this application, the interior of the second extension seat is provided with a second rotating groove, the interior of the second rotating groove is provided with a second stabilizing bearing, the interior of the second stabilizing bearing is rotatably connected with a rotating shaft, one end of the rotating shaft is provided with a rotating seat, the rotating seat is located within the second movable interval, one side of the rotating seat is provided with a clamping spring, one end of the clamping spring is provided with a fixed clamping plate, the fixed clamping plates of the two second extension seats are spaced apart to form a clamping interval, and the unwinding rotating shaft is detachably connected to the clamping interval.

[0014] Furthermore, in this application, a fixing block is provided on one side of the fixing clamp, an external spline is provided on the outside of the fixing block, fixing grooves are provided at both ends of the unwinding shaft, an internal spline is provided inside the fixing groove, and the fixing block is inserted into the adjacent fixing groove, so that the external spline is connected to the adjacent internal spline.

[0015] Furthermore, in this application, a mounting groove is provided on one side of the rotating seat, and first locking protrusions are provided on both sides of the interior of the mounting groove. The other end of the clamping spring is inserted into the mounting groove, so that the first locking protrusions on both sides of the mounting groove are engaged with the other end of the clamping spring. A mounting post is provided on the other side of the fixing plate, and second locking protrusions are provided on both sides of the mounting post. The mounting post is inserted into one end of the clamping spring, so that the second locking protrusions on both sides of the mounting post are engaged with the one end of the clamping spring.

[0016] Furthermore, in this application, the mounting groove is provided with a guide piston cylinder, which is located inside the clamping spring. A guide piston rod is slidably connected inside the guide piston cylinder, and the guide piston rod is connected to the other side of the fixed clamping plate.

[0017] Furthermore, in this application, the other side of the fixed clamp is provided with a plurality of limiting pins, and the side of the rotating seat is provided with a plurality of limiting slots, wherein the plurality of limiting pins are inserted into the plurality of limiting slots.

[0018] Furthermore, in this application, the bottom of the vehicle body is provided with multiple movable base frames, and a movable wheel is rotatably connected to one side of the movable base frame. Multiple first fixing holes are opened inside the movable wheel, and a second fixing hole is opened on one side of the movable base frame. A fixing pin passes through the inside of the second fixing hole, and the fixing pin is inserted into any of the first fixing holes.

[0019] This utility model has the following beneficial effects:

[0020] Before replacing the conveyor belt, one end of the old conveyor belt needs to be guided onto the take-up spool so that the drive chain of the old conveyor belt meshes with the first drive tooth. At the same time, the new conveyor belt is already threaded onto the outside of the unwinding spool, and one end of the new conveyor belt is connected to the other end of the old conveyor belt. When the operator rotates the take-up spool, the rotation of the take-up spool causes the old conveyor belt to begin to wind around the take-up spool. Since one end of the new conveyor belt is connected to the other end of the old conveyor belt, the old conveyor belt will drive the new conveyor belt to unwind during the drive winding process, so that the new conveyor belt gradually replaces the position of the old conveyor belt. This completes the disassembly of the old conveyor belt and the installation of the new conveyor belt simultaneously, avoiding the operator's long-term exposure to the high temperature of the old conveyor belt and simplifying the installation method of the new conveyor belt. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the winding shaft of this utility model.

[0023] Figure 3 This is a schematic diagram of the unwinding shaft of this utility model.

[0024] Figure 4 This is a schematic diagram of the rotating seat of this utility model.

[0025] Figure 5 This is a structural schematic diagram of the fixing clamp of this utility model.

[0026] Figure 6 This is a schematic diagram of the clamping spring of this utility model.

[0027] Figure 7 This is a schematic diagram of the structure of the mobile wheel of this utility model.

[0028] Figure 8 This is a schematic diagram of the vehicle body structure of this utility model.

[0029] In the attached figures, the following labels are used:

[0030] 1. Vehicle body; 4. Movable base frame; 5. Movable wheels; 6. First fixing hole; 7. Second fixing hole; 8. Fixing pin; 9. First support frame; 10. First extension seat; 11. Rewinding shaft; 12. Limiting plate; 13. Limiting interval; 14. First rotating groove; 15. First stabilizing bearing; 16. First movable interval; 17. First transmission tooth; 18. Rotating turntable; 19. First locking hole; 20. Second locking hole; 21. Locking pin; 22. Second support frame; 23. Second extension seat; 24. Second movable interval 25. Second rotating groove; 26. Second stabilizing bearing; 27. Rotating shaft; 28. Rotating seat; 29. ​​Fixed clamping plate; 30. Limiting insert; 31. Limiting slot; 32. Mounting groove; 33. Guide piston cylinder; 34. Guide piston rod; 35. First locking protrusion; 36. Clamping spring; 37. Fixed insert; 38. Mounting post; 39. Second locking protrusion; 40. Fixed groove; 41. External spline; 42. Internal spline; 43. Unwinding shaft; 44. Second transmission tooth; 45. Clamping interval; 46. Old conveyor belt; 47. New conveyor belt. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Reference Figures 1-8 In some specific embodiments, a conveyor belt replacement trolley includes a trolley body 1. The top of the trolley body 1 is provided with a first support frame 9. The top of the first support frame 9 is provided with two first extension seats 10. The two first extension seats 10 are separated to form a first movable interval 16. A winding shaft 11 is rotatably connected inside the first movable interval 16. The outside of the winding shaft 11 is provided with a first transmission tooth 17. The winding shaft 11 is used to wind up the old conveyor belt 46, so that the transmission chain of the old conveyor belt 46 meshes with the first transmission tooth 17. The top of the trolley body 1 is provided with a second support frame 22. The top of the second support frame 22 is provided with two second extension seats 23. The two second extension seats 23 are separated to form a second movable interval 24. A unwinding shaft 43 is rotatably connected inside the second movable interval 24. The outside of the unwinding shaft 43 is provided with a second transmission tooth 44. The unwinding shaft 43 is used to place a new conveyor belt 47, so that the transmission chain of the new conveyor belt 47 meshes with the second transmission tooth 44.

[0035] With the above technical solution, before replacing the conveyor belt, one end of the old conveyor belt 46 needs to be guided onto the take-up shaft 11 so that the drive chain of the old conveyor belt 46 meshes with the first drive tooth 17. At the same time, the new conveyor belt 47 is already passed through the outside of the unwinding shaft 43, and one end of the new conveyor belt 47 is connected to the other end of the old conveyor belt 46. When the operator rotates the take-up shaft 11, the rotation of the take-up shaft 11 causes the old conveyor belt 46 to begin to wind around the take-up shaft 11. Since one end of the new conveyor belt 47 is connected to the other end of the old conveyor belt 46, the old conveyor belt 46 will drive the new conveyor belt 47 to unwind during the drive winding process, so that the new conveyor belt 47 gradually replaces the position of the old conveyor belt 46, thereby simultaneously completing the disassembly of the old conveyor belt 46 and the installation of the new conveyor belt 47. This avoids the operator from being in contact with the old conveyor belt 46 at high temperatures for a long time and simplifies the installation method of the new conveyor belt 47.

[0036] In addition, one end of the new conveyor belt 47 can be temporarily fixed to the other end of the old conveyor belt 46 by steel wire or bolts.

[0037] Reference Figures 1-2In some specific embodiments, a first rotating groove 14 is provided inside the first extension seat 10, and a first stabilizing bearing 15 is provided inside the first rotating groove 14. The two ends of the winding shaft 11 are respectively rotatably connected to the inside of the first stabilizing bearing 15 of the two first extension seats 10.

[0038] With the above technical solution, by using the first stabilizing bearing 15, the winding shaft 11 can rotate smoothly inside the first rotating groove 14 of the first extension seat 10, which helps to reduce friction and resistance when winding the old conveyor belt 46 and improve the smoothness of operation.

[0039] Reference Figures 1-2 In some specific embodiments, one end of the winding shaft 11 passes through the adjacent first stabilizing bearing 15, and one end of the winding shaft 11 is provided with a rotating disk 18. The rotating disk 18 has a plurality of first locking holes 19 inside, and a second locking hole 20 is provided in the first extension seat 10 adjacent to the rotating disk 18. A locking pin 21 passes through any of the first locking holes 19 and is inserted into the second locking hole 20.

[0040] With the above technical solution, when the operator needs to place the old conveyor belt 46 outside the winding shaft 11, in order to prevent the winding shaft 11 from rotating, the locking pin 21 passes through the first locking hole 19 and is inserted into the second locking hole 20, thereby locking the position of the rotating turntable 18 and preventing the winding shaft 11 from rotating; and the design of the rotating turntable 18 allows the operator to easily wind up the shaft 11, thus facilitating the winding up of the old conveyor belt 46.

[0041] Reference Figures 1-2 In some specific embodiments, two limiting plates 12 are provided on the outside of the winding shaft 11, and the two limiting plates 12 are separated to form a limiting interval 13, so that the old conveyor belt 46 is located inside the limiting interval 13.

[0042] With the above technical solution, when the old conveyor belt 46 is wound up, it is guided into the limiting interval 13 between the two limiting plates 12. The width of the limiting interval 13 restricts the position of the conveyor belt winding and prevents the conveyor belt from moving during winding, which helps to maintain uniform winding tension.

[0043] Reference Figures 3-6In some specific embodiments, a second rotating groove 25 is provided inside the second extension seat 23, a second stabilizing bearing 26 is provided inside the second rotating groove 25, a rotating shaft 27 is rotatably connected inside the second stabilizing bearing 26, a rotating seat 28 is provided at one end of the rotating shaft 27, the rotating seat 28 is located in the second movable interval 24, a clamping spring 36 is provided on one side of the rotating seat 28, a fixing clamp 29 is provided at one end of the clamping spring 36, the fixing clamps 29 of the two second extension seats 23 are spaced apart to form a clamping interval 45, and the unwinding rotating shaft 43 is detachably connected to the clamping interval 45.

[0044] With the above technical solution, the operator will thread the new conveyor belt 47 through the winding shaft 11. By placing the winding shaft 11 in the clamping interval 45 formed by the two fixed clamps 29, it is convenient to install the new conveyor belt 47 at the position where it needs to be unwound, so as to replace the old conveyor belt 46.

[0045] Furthermore, when the new conveyor belt 47 is unwound, the old conveyor belt 46 is completely wound around the take-up shaft 11. At this time, one end of the old conveyor belt 46 can be installed outside the unwinding shaft 43. By rotating the unwinding shaft 43, the old conveyor belt 46 is wound around the unwinding shaft 43, so that the old conveyor belt 46 can be disassembled from the unwinding shaft 43. The old conveyor belt is then disassembled from the clamping interval 45 by the unwinding shaft 43.

[0046] Reference Figures 3-6 In some specific embodiments, a fixing insert 37 is provided on one side of the fixing clamp 29, an external spline 41 is provided on the outside of the fixing insert 37, a fixing groove 40 is provided at both ends of the unwinding shaft 43, an internal spline 42 is provided inside the fixing groove 40, and the fixing insert 37 is inserted into the adjacent fixing groove 40 so that the external spline 41 is splined to the adjacent internal spline 42.

[0047] With the above technical solution, when it is necessary to fix the unwinding shaft 43, the operator places the unwinding shaft 43 in the clamping interval 45, and the fixing block 37 is inserted into the adjacent fixing slot 40, so that the outer spline 41 is splined with the adjacent inner spline 42. The spline connection provides a strong connection force, so that the unwinding shaft 43 will not be displaced due to external force during operation, thus improving the safety and stability of operation.

[0048] Reference Figures 3-6In some specific embodiments, a mounting groove 32 is provided on one side of the rotating seat 28, and first locking protrusions 35 are provided on both sides of the interior of the mounting groove 32. The other end of the clamping spring 36 is inserted into the mounting groove 32, so that the first locking protrusions 35 on both sides of the mounting groove 32 are engaged with the other end of the clamping spring 36. A mounting post 38 is provided on the other side of the fixing clamp plate 29, and second locking protrusions 39 are provided on both sides of the mounting post 38. The mounting post 38 is inserted into one end of the clamping spring 36, so that the second locking protrusions 39 on both sides of the mounting post 38 are engaged with the one end of the clamping spring 36.

[0049] Through the above technical solution, the clamping spring 36 can be stably fixed between the mounting groove 32 and the fixing plate 29 by the snap-fit ​​design of the first snap-fit ​​protrusion 35 and the second snap-fit ​​protrusion 39, thus preventing the clamping spring 36 from falling off under the action of external force.

[0050] Reference Figure 6 In some specific embodiments, the mounting groove 32 is provided with a guide piston cylinder 33, which is located inside the clamping spring 36. A guide piston rod 34 is slidably connected inside the guide piston cylinder 33, and the guide piston rod 34 is connected to the other side of the fixed clamping plate 29.

[0051] Through the above technical solution, the guide piston cylinder 33 provides a precise sliding path for the guide piston rod 34, ensuring the stable and accurate movement of the fixed clamping plate 29 during the clamping process, thereby improving the accuracy of the fixed insert block 37 and the adjacent fixed groove 40.

[0052] Reference Figure 6 In some specific embodiments, a plurality of limiting pins 30 are provided on the other side of the fixed clamp 29, and a plurality of limiting slots 31 are provided on one side of the rotating seat 28, with the plurality of limiting pins 30 being inserted into the plurality of limiting slots 31.

[0053] With the above technical solution, when the unwinding shaft 43 is placed within the clamping interval 45, the unwinding shaft 43 will drive the fixed clamping plate 29 to move, so that the multiple limiting pins 30 of the fixed clamping plate 29 are inserted into the multiple limiting slots 31. Thus, when the unwinding shaft 43 rotates, the limiting pins 30 replace the clamping spring 36 to drive the rotating seat 28 to rotate, thereby avoiding the clamping spring 36 from twisting during rotation and affecting the clamping force of the clamping spring 36.

[0054] Reference Figure 7 In some specific embodiments, the bottom of the vehicle body 1 is provided with multiple movable base frames 4, and a movable wheel 5 is rotatably connected to one side of the movable base frame 4. Multiple first fixing holes 6 are opened inside the movable wheel 5, and a second fixing hole 7 is opened on one side of the movable base frame 4. A fixing pin 8 passes through the inside of the second fixing hole 7, and the fixing pin 8 is inserted into any of the first fixing holes 6.

[0055] With the above technical solution, when it is necessary to fix the moving wheel 5, the fixing pin 8 is passed through the second fixing hole 7 of the moving base frame 4, so that the fixing pin 8 is inserted into any of the first fixing holes 6, thereby limiting the position of the moving wheel 5 and preventing the moving wheel 5 from rotating when the old conveyor belt 46 is replaced.

[0056] In addition, to increase the stability of the vehicle body 1, a load-bearing object can be added to the vehicle body 1 when the old conveyor belt 46 is wound up, thereby further enhancing the stability of the old conveyor belt 46 during winding.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

Claims

1. A trolley for changing conveyor belts, characterized in that, The vehicle includes a body, the top of which is provided with a first support frame. The top of the first support frame is provided with two first extension seats, which are separated by a first movable interval. A winding shaft is rotatably connected inside the first movable interval. The outside of the winding shaft is provided with a first transmission tooth. The winding shaft is used to wind up an old conveyor belt, so that the transmission chain of the old conveyor belt meshes with the first transmission tooth. The top of the vehicle also includes a second support frame, the top of which is provided with two second extension seats, which are separated by a second movable interval. An unwinding shaft is rotatably connected inside the second movable interval. The outside of the unwinding shaft is provided with a second transmission tooth. The unwinding shaft is used to place a new conveyor belt, so that the transmission chain of the new conveyor belt meshes with the second transmission tooth.

2. A conveyor belt changing trolley according to claim 1, characterized in that, The first extension seat has a first rotating groove inside, and the first rotating groove has a first stabilizing bearing inside. The two ends of the winding shaft are respectively rotatably connected to the first stabilizing bearings of the two first extension seats.

3. A conveyor belt changing trolley according to claim 2, characterized in that, One end of the winding shaft passes through the adjacent first stabilizing bearing. One end of the winding shaft is provided with a rotating disk. The rotating disk has multiple first locking holes inside. The first extension seat adjacent to the rotating disk has a second locking hole. A locking pin passes through any of the first locking holes and is inserted into the second locking hole.

4. A conveyor belt changing trolley according to claim 1, characterized in that, The winding shaft is provided with two limiting plates on its outside, and the two limiting plates are separated to form a limiting interval, so that the old conveyor belt is located inside the limiting interval.

5. A conveyor belt changing trolley according to claim 1, characterized in that, The second extension seat has a second rotating groove inside, and a second stabilizing bearing is provided inside the second rotating groove. A rotating shaft is rotatably connected inside the second stabilizing bearing. A rotating seat is provided at one end of the rotating shaft. The rotating seat is located within the second movable interval. A clamping spring is provided on one side of the rotating seat. A fixed clamping plate is provided at one end of the clamping spring. The fixed clamping plates of the two second extension seats are spaced apart to form a clamping interval. The unwinding shaft is detachably connected to the clamping interval.

6. A conveyor belt changing trolley according to claim 5, characterized in that, A fixing block is provided on one side of the fixing clamp, and an external spline is provided on the outside of the fixing block. Fixing grooves are provided at both ends of the unwinding shaft, and an internal spline is provided inside the fixing groove. The fixing block is inserted into the adjacent fixing groove, so that the external spline is connected to the adjacent internal spline.

7. A conveyor belt changing trolley according to claim 6, characterized in that, The rotating seat has a mounting groove on one side, and the mounting groove has first locking protrusions on both sides inside. The other end of the clamping spring is inserted into the mounting groove, so that the first locking protrusions on both sides of the mounting groove are engaged with the other end of the clamping spring. The fixed clamping plate has a mounting post on the other side, and the mounting post has second locking protrusions on both sides. The mounting post is inserted into one end of the clamping spring, so that the second locking protrusions on both sides of the mounting post are engaged with the one end of the clamping spring.

8. A conveyor belt changing trolley according to claim 7, characterized in that, The mounting groove is provided with a guide piston cylinder, which is located inside the clamping spring. A guide piston rod is slidably connected inside the guide piston cylinder, and the guide piston rod is connected to the other side of the fixed clamping plate.

9. A conveyor belt changing trolley according to claim 8, characterized in that, The other side of the fixed clamp is provided with multiple limiting pins, and the side of the rotating seat is provided with multiple limiting slots, and the multiple limiting pins are inserted into the multiple limiting slots.

10. A conveyor belt changing trolley according to claim 1, characterized in that, The bottom of the vehicle body is provided with multiple movable base frames. A movable wheel is rotatably connected to one side of each movable base frame. Multiple first fixing holes are opened inside the movable wheel. A second fixing hole is opened on one side of each movable base frame. A fixing pin passes through the inside of the second fixing hole. The fixing pin is inserted into any of the first fixing holes.

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