A belt conveyor lower roller replacement device and an auxiliary device thereof

Abstract

The utility model relates to the field of belt conveyor carrier roller replacement equipment, disclose a kind of belt conveyor lower carrier roller replacement device and its auxiliary device, including lifting platform and the mobile device being arranged in the surface of lifting platform, mobile device is connected with first bearing groove and second bearing groove, lifting platform and mobile device drive first bearing groove and second bearing groove move in vertical direction and horizontal direction, first bearing groove can be removed old lower carrier roller when lifting platform rises, second bearing groove can place new lower carrier roller when lifting platform descends.The utility model has the beneficial effects of reducing manual labor intensity, reducing production interruption loss, improving replacement accuracy and efficiency, and can quickly and safely complete the replacement of lower carrier roller.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyor idler replacement equipment, and in particular to a belt conveyor lower idler replacement device and its auxiliary device. Background Technology

[0002] Belt conveyors are widely used continuous transportation equipment in industries such as metallurgy, mining, ports, and power. Their core components include upper idlers, lower idlers, and the conveyor belt. The lower idlers are located in the return section of the belt conveyor and serve as the main support for the conveyor belt in this section. They bear the weight of the conveyor belt, material friction, and environmental corrosion over long periods, making them prone to wear, deformation, or bearing seizure. If the lower idlers fail and are not replaced in time, it can lead to conveyor belt misalignment, accelerated localized wear, or even breakage, severely impacting production efficiency and equipment safety.

[0003] Currently, replacing the lower idler roller mainly relies on manual operation, requiring the following steps: first, stop the machine and disconnect the conveyor power; then, manually lift the return section of the conveyor belt, remove the old idler roller, and install the new one; finally, reset the conveyor belt and restart the equipment. This method has the following technical drawbacks: 1. The replacement process requires interrupting the operation of the conveyor and must be stopped. For production lines that operate continuously (such as ore transportation in mines and bulk cargo loading and unloading in ports), a single shutdown for replacement may result in several hours of production stagnation, directly affecting production capacity.

[0004] 2. Manual labor is labor-intensive and inefficient. The return section of the conveyor belt is heavy and requires multiple people to lift and keep it stable. This not only consumes manpower but also takes a long time. It is easy for the conveyor belt to slip due to coordination errors, which poses a risk of personnel injury. Existing lifting tools can only lift the idler rollers vertically and cannot maintain the tension of the conveyor belt at the same time (especially on the return section), so it is necessary to rely entirely on the machine being stopped.

[0005] Chinese utility model patent CN217123032U discloses a "quick roller replacement device," comprising a base plate, a top plate, support plates, and a lead screw. A scissor-type lifting mechanism is positioned above the base plate, and the top plate is located on top of the scissor-type lifting mechanism. A hydraulic rod is installed within the scissor-type lifting mechanism, driving it to rise and fall. Two support plates are slidably mounted on the top surface of the top plate. The lead screw passes through the two support plates and is threadedly connected to them. Rotation of the lead screw causes the two support plates to move closer or further apart. Each support plate has a groove. While this patent's support plates can lift the roller shaft, making roller replacement quick and convenient, and operable by a single person, it cannot automatically replace new rollers. The new roller still needs to be manually placed in the original position, resulting in low efficiency and poor accuracy. It does not achieve automated operation, requires a high degree of manual intervention, and still presents safety concerns. Utility Model Content

[0006] To overcome the problems of reduced production capacity due to machine downtime required for lower idler replacement, difficulty in lifting the conveyor belt, and low efficiency and poor accuracy in automatically replacing new idlers in the aforementioned background technologies, this utility model provides a lower idler replacement device for belt conveyors and its auxiliary devices. Through the coordinated use of a lifting platform, a moving device, and auxiliary devices, machine downtime is eliminated, the conveyor belt can be easily lifted, and new idlers can be automatically replaced. This allows for rapid disassembly of the lower idler and precise positioning of the new idler, reducing manual labor intensity, minimizing production interruption losses, improving replacement accuracy and efficiency, and enabling fast and safe lower idler replacement.

[0007] The technical solution of this utility model is as follows: A belt conveyor lower idler replacement device includes a lifting platform and a moving device arranged on the surface of the lifting platform. The moving device is connected to a first bearing groove and a second bearing groove. The lifting platform and the moving device drive the first bearing groove and the second bearing groove to move in the vertical and horizontal directions. The first bearing groove can remove the old lower idler when the lifting platform rises, and the second bearing groove can place the new lower idler when the lifting platform falls.

[0008] Compared with existing technologies, the beneficial effects of this technical solution are as follows: The replacement device provided in this application utilizes the coordinated action of a lifting platform and a moving device. The lifting platform can drive the first and second bearing grooves to move vertically up and down, while the moving device can drive the first and second bearing grooves to move horizontally. The first bearing groove can remove the old lower roller, while the second bearing groove can install the new lower roller. There is no need to manually place the new lower roller under the roller bracket, thus realizing the automated replacement process of the lower roller. This solves the problems of the background technology, which lacks automation, has a high degree of manual intervention, and has insufficient safety. It has the beneficial effects of reducing manual labor intensity, improving replacement efficiency, and enabling the rapid and safe replacement of lower rollers.

[0009] Preferably, the lifting platform is a scissor lift, and the moving device is a screw drive mechanism, which is installed on the working platform of the scissor lift.

[0010] Its beneficial effects are as follows: The scissor lift hydraulic lift drives the first and second bearing grooves to move up and down, and provides vertical lifting force to lift the lower support roller. The screw drive mechanism carries the first and second bearing grooves and realizes lateral movement. The two work together to complete the fully automated process of moving the old lower support roller out and installing the new lower support roller.

[0011] More preferably, the scissor lift includes a base located below the work platform, with scissor arms connecting the two sides of the base to the work platform, a hydraulic cylinder in the middle connecting to the work platform, and rollers installed on the bottom surface.

[0012] Its beneficial effects are as follows: the scissor arm and the hydraulic cylinder work together to make the work platform only able to move vertically up and down, and move vertically up and down on a predetermined trajectory, so as to realize the vertical movement of the first and second bearing grooves driven by the work platform, and realize the replacement of the lower roller; the setting of the rollers makes it easier to push the entire replacement device.

[0013] More preferably, the lead screw transmission mechanism includes a connected drive motor and a lead screw, with a first bearing groove and a second bearing groove arranged side by side on the working platform and sleeved on the lead screw body and threaded thereon.

[0014] Its beneficial effect is that the rotation of the lead screw can drive the first and second bearing grooves to move laterally. Thus, by controlling the operation of the drive motor and its rotation direction, the lateral movement direction and displacement of the first and second bearing grooves can be controlled, thereby realizing the replacement of the lower roller.

[0015] More preferably, the lead screw passes vertically through the lower part of the first bearing groove and the lower part of the second bearing groove in the horizontal direction. The groove structure in the first bearing groove and the groove structure in the second bearing groove both cooperate with the lower support roller. The lower support roller can be placed in the groove of the first bearing groove or the groove of the second bearing groove.

[0016] Its beneficial effects are as follows: by setting the lead screw to pass through the first bearing groove and the second bearing groove simultaneously, the two can be driven to move synchronously. The groove structure in the first bearing groove and the second bearing groove cooperates with the lower support, which can prevent the lower support roller from falling off during the replacement process, and ensure the stability and smoothness of the replacement process.

[0017] More preferably, the drive motor is a stepper motor, and the lead screw transmission mechanism also includes a coupling connecting the output shaft of the stepper motor and the lead screw. One end of the lead screw near the coupling is provided with a transmission seat, and the other end is provided with a support seat. Bearings are provided in both the transmission seat and the support seat, and the lead screw passes through the bearings in both.

[0018] Its beneficial effects are as follows: the lead screw transmission mechanism can improve the positioning accuracy of the first and second bearing grooves through the stepper motor, making the positioning of removing the old lower roller and replacing the new lower roller more accurate; the coupling is used to connect the output shaft of the motor and the input shaft of the lead screw, which can reliably transmit torque, compensate for unavoidable shaft deviations, facilitate installation and maintenance, and ensure correct installation and alignment; the transmission seat and support seat are used to stably support the two ends of the lead screw, and the lead screw can rotate freely with the stepper motor in the bearings inside the two, controlling the lateral displacement of the first and second bearing grooves.

[0019] In a further preferred embodiment, both ends of the bottom surfaces of the first and second bearing grooves are respectively connected to sliders, and a guide rail is provided below the sliders, allowing the sliders to slide on the guide rails.

[0020] Its beneficial effects are as follows: the lead screw can drive the first and second bearing grooves to move laterally on the guide rail through the slider, which improves the stability of the two during the movement and avoids the problem of deviation.

[0021] More preferably, the guide rail is parallel to the lead screw; one side of the guide rail is provided with a groove extending along its length, the slider is embedded in the groove and can slide within the groove.

[0022] Its beneficial effects are that the slider can move along the side of the guide rail and maintain a stable connection with the guide rail during the movement, further improving the stability of the first and second bearing grooves during the lateral movement. This utility model also provides a technical solution: An auxiliary device is used in conjunction with the aforementioned belt conveyor lower idler roller replacement device. The auxiliary device is arranged on both sides of the mobile device, and its top surface is higher than the top surface of the mobile device. It can lift the conveyor belt when the lifting platform rises.

[0023] Its beneficial effects are as follows: by setting up an auxiliary device with its top surface higher than the top surface of the moving device, it can provide temporary support for the return section conveyor when the lower idler is lowered, and maintain the tension of the conveyor belt during the lifting process of the lifting platform, avoiding the risk of deviation or slippage caused by the loosening of the conveyor belt, realizing the replacement of the lower idler in the continuous operation of the belt conveyor, and solving the technical bottlenecks of the traditional method that requires stopping the machine and cannot maintain the tension of the conveyor belt.

[0024] Preferably, the auxiliary device includes an auxiliary support and an auxiliary roller, the auxiliary support is fixed to the platform surface, and the two ends of the auxiliary roller are engaged in the slots of the auxiliary support.

[0025] Its beneficial effect is that when the lifting platform rises, the auxiliary idler rollers lift the conveyor belt, and the conveyor belt can smoothly transition from the surface of the auxiliary idler rollers. Attached Figure Description

[0026] This utility model will be described with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the structure of this utility model when replacing the lower idler roller.

[0027] Reference numerals: 1. Lifting platform; 11. Scissor lift; 12. Working platform; 13. Base; 14. Scissor arm; 15. Hydraulic cylinder; 16. Roller; 2. Moving device; 21. Screw transmission mechanism; 22. Drive motor; 221. Stepper motor; 23. Screw; 24. Coupling; 25. Transmission seat; 26. Support seat; 31. First bearing groove; 32. Second bearing groove; 33. Groove; 4. Slider; 41. Guide rail; 42. Slide rail; 5. Auxiliary device; 51. Auxiliary idler; 52. Idler support; 6. Bayonet; 61. Conveyor belt; 62. Lower idler; 63. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Example 1: As Figures 1 to 4 The belt conveyor lower idler roller replacement device shown includes a lifting platform 1 and a moving device 2 arranged on the surface of the lifting platform 1. The moving device 2 is connected to a first bearing groove 31 and a second bearing groove 32. The lifting platform 1 and the moving device 2 drive the first bearing groove 31 and the second bearing groove 32 to move in the vertical and horizontal directions. The first bearing groove 31 can remove the old lower idler roller 63 when the lifting platform 1 rises, and the second bearing groove 32 can place the new lower idler roller 63 when the lifting platform 1 falls.

[0030] Specifically, such as Figure 4As shown, the return section of the belt conveyor is located below the transport section. The lower idler roller 63 of the return section is suspended on the inner side of the idler roller brackets 6 on both sides and arranged horizontally. The shaft ends of the lower idler roller 63 are engaged in the slots 61 of the idler roller brackets 6. Pushing the lower idler roller 63 upward, the lower idler roller 63 can be detached from the idler roller brackets 6. The conveyor belt 62 is laid on the surface of the lower idler roller 63. In this embodiment, when the lower idler roller 63 needs to be replaced, the new lower idler roller 63 is first placed in the second bearing groove 32. Then, the replacement device is moved to the lower idler roller 63 to be replaced, while keeping the first bearing groove 31 and the second bearing groove in place. The length direction of the second support groove 32 is consistent with the length direction of the lower support roller 63 to be replaced. Then, the moving device 2 is controlled to move, and the first support groove 31 is moved to the lower support roller 63 to be replaced directly below it. Then, the lifting platform 1 is controlled to move upward, driving the first support groove 31 to move upward and lift the old lower support roller 63 upward, so that it is separated from the support roller bracket 6. Next, the moving device 2 is controlled to move horizontally, so that the first support groove 31 is away from the replacement position, and the second support groove 32 reaches the upper part of the replacement position. Finally, the lifting platform 1 is controlled to descend, so that the new lower support roller 63 is inserted into the support roller bracket 6, and the replacement of the lower support roller 63 is automatically completed.

[0031] Therefore, the replacement device provided in this embodiment, through the coordinated action of the lifting platform 1 and the moving device 2, enables the lifting platform 1 to drive the first bearing groove 31 and the second bearing groove 32 to move vertically up and down, and the moving device 2 to drive the first bearing groove 31 and the second bearing groove 32 to move horizontally. The first bearing groove 31 can remove the old lower roller 63, while the second bearing groove 32 can install the new lower roller 63. There is no need to manually place the new lower roller 63 under the roller bracket 6, realizing the automated replacement process of the lower roller 63. This solves the problems of non-automated operation, high degree of manual intervention, and insufficient safety in the background technology. It has the beneficial effects of reducing manual labor intensity, improving replacement efficiency, and being able to quickly and safely complete the replacement of the lower roller 63.

[0032] Example 2: Based on Example 1, the structure of the lifting platform 1 and the moving device 2 is optimized. The lifting platform 1 is a scissor lift 11, and the moving device 2 is a screw drive mechanism 21, which is mounted on the working platform 12 of the scissor lift 11. The scissor lift 11 drives the first bearing groove 31 and the second bearing groove 32 to move up and down, and provides vertical lifting force to lift the lower support roller 63. The screw drive mechanism 21 carries the first bearing groove 31 and the second bearing groove 32 and realizes lateral movement. The two work together to complete the fully automated process of moving the old lower support roller 63 to the installation of the new lower support roller 63.

[0033] Specifically, the scissor lift 11 includes a base 13 located below the work platform 12. The two sides of the base 13 are connected to the work platform 12 via scissor arms 14, and a hydraulic cylinder 15 is located in the middle and connected to the work platform 12. Rollers 16 are also installed on the bottom surface. The scissor arms 14 are symmetrically arranged on both sides of the base 13, and are connected by multiple hinged arms to form one or more "X" shaped cross structures. The mounting base of the hydraulic cylinder 15 is fixed on the base 13, and its connecting rod output end is fixedly connected to the bottom surface of the work platform 12. When the connecting rod extends or retracts, it drives the work platform 12 to move up and down. When the hydraulic cylinder 15 pushes / pulls the work platform 12, it causes the scissor arms 14 to rotate around their central pivot to unfold or fold. The core function is to efficiently convert and amplify the small-stroke linear thrust of the hydraulic cylinder 15 into a large-stroke, strictly vertical lifting motion of the work platform 12. At the same time, it provides guidance, stability, support, foldability, synchronous movement, and structural compactness. Thus, the scissor arms 14 and the hydraulic cylinder 15 work together to enable the work platform 12 to only perform vertical lifting motion, moving vertically up and down on a predetermined trajectory. This allows the work platform 12 to drive the first bearing groove 31 and the second bearing groove 32 to move in the vertical direction, realizing the replacement of the lower roller 63. The setting of the roller 16 makes it easier to push the entire replacement device. In addition, the hydraulic cylinder 15 can be connected to the control system, which can automatically control the first bearing groove 31 and the second bearing groove 32 to move up and down, further improving the degree of automation.

[0034] The lead screw transmission mechanism 21 includes a connected drive motor 22 and a lead screw 23. A first bearing groove 31 and a second bearing groove 32 are arranged side-by-side on the work platform 12 and are threaded onto the lead screw 23. The output shaft of the drive motor 22 rotates the lead screw 23 in both forward and reverse directions. Since the lead screw 23 is threaded onto the first and second bearing grooves 31 and 32, its rotation causes the first and second bearing grooves 31 and 32 to move laterally. Therefore, by controlling the operation and rotation direction of the drive motor 22, the lateral movement direction and displacement of the first and second bearing grooves 31 and 32 can be controlled, enabling the replacement of the lower idler roller 63. Furthermore, the drive motor 22 can be connected to a control system, which can automatically control the lateral movement direction and displacement of the first and second bearing grooves 31 and 32, further improving the level of automation.

[0035] Preferably, the lead screw 23 is arranged horizontally above the surface of the lifting platform 1 and passes vertically through the lower part of the first bearing groove 31 and the lower part of the second bearing groove 32 in sequence. Both the first and second bearing grooves 31 and 32 have grooves 33 extending along their length. The structure of the grooves 33 matches the structure of the lower support roller 63, allowing the lower support roller 63 to be placed within the grooves 33 with its shaft ends flush with the ends of the grooves 33. The lead screw 23 must be perpendicular to the length of the grooves 33. Thus, by simultaneously passing the lead screw 23 through the first and second bearing grooves 31 and 32, both can move synchronously. The groove structure 33 within the first and second bearing grooves 31 and 32, in conjunction with the lower support roller 63, prevents the lower support roller 63 from falling off during replacement, ensuring the stability and smoothness of the replacement process.

[0036] In a further preferred embodiment, the drive motor 22 is a stepper motor 221, and the lead screw transmission mechanism 21 also includes a coupling 24 connecting the output shaft of the stepper motor 221 and the lead screw 23. One end of the lead screw 23 near the coupling 24 is provided with a transmission seat 25, and the other end is provided with a support seat 26. Bearings are provided in both the transmission seat 25 and the support seat 26, and the lead screw 23 passes through the bearings of both. Among them, the drive motor 22 is a stepper motor 221. The lead screw transmission mechanism 21 can improve the positioning accuracy of the first bearing groove 31 and the second bearing groove 32 through the stepper motor 221, so that the positioning position of removing the old lower support roller 63 and replacing the new lower support roller 63 is more accurate. The coupling 24 is used to connect the output shaft of the motor and the input shaft of the lead screw, which can reliably transmit torque, compensate for unavoidable shaft deviations, facilitate installation and maintenance, and ensure correct installation and alignment. The transmission seat 25 and the support seat 26 are used to stably support the two ends of the lead screw 23, and the lead screw 23 can rotate freely with the stepper motor 221 in the bearings inside the two, controlling the lateral displacement of the first bearing groove 31 and the second bearing groove 32.

[0037] In a further preferred embodiment, both ends of the bottom surfaces of the first bearing groove 31 and the second bearing groove 32 are respectively fixedly connected to sliders 4. A guide rail 41 is provided below the sliders 4, and the sliders 4 can slide on the guide rail 41. Thus, the lead screw 23 can drive the first bearing groove 31 and the second bearing groove 32 to move laterally on the guide rail 41 through the sliders 4, which improves the stability of the two during the movement and avoids the problem of deviation.

[0038] Specifically, the guide rail 41 is parallel to the lead screw 23, which is located between the two guide rails 41. The inner / outer sides of the guide rail 41 are provided with a groove 42 extending along its length. The slider 4 can be a "┗" shaped structure, with its lower part embedded in the groove 42 and connected to it. It can slide in the groove 42, so that the slider 4 can move along the side of the guide rail 41 and maintain a stable connection with the guide rail 41 during the movement, further improving the stability of the first bearing groove 31 and the second bearing groove 32 during the lateral movement.

[0039] Example 3: Based on the above examples, this example also provides an auxiliary device 5, which is used in conjunction with the belt conveyor lower idler roller replacement device. The auxiliary device 5 is arranged on both sides of the moving device 2, that is, the screw drive mechanism 21 is arranged between the two auxiliary devices 5. The top surface of the auxiliary device 5 is higher than the top surface of the moving device 2, and can lift the conveyor belt 62 when the lifting platform 1 rises.

[0040] Therefore, by setting up an auxiliary device 5, with its top surface higher than the top surface of the moving device 2, it provides temporary support for the return section conveyor when the lower idler 63 is lowered, and maintains the tension of the conveyor belt 62 during the lifting process of the lifting platform 1, avoiding the risk of deviation or slippage caused by the loosening of the conveyor belt 62. This enables the replacement of the lower idler 63 in the continuous operation of the belt conveyor, solving the technical bottlenecks of the traditional method that requires stopping the machine and cannot maintain the tension of the conveyor belt.

[0041] Specifically, the auxiliary device 5 includes an auxiliary support 51 and an auxiliary roller 52. The auxiliary support 51 is fixed to the surface of the working platform 12. The two ends of the auxiliary roller 52 are engaged in the slots 61 of the auxiliary support 51. The auxiliary supports 51 at both ends of each auxiliary roller 52 stand opposite each other. The length direction of the auxiliary roller 52 is consistent with the length direction of the first bearing groove 31 and the second bearing groove 32. When the lifting platform 1 rises, the auxiliary roller 52 lifts the conveyor belt 62, and the conveyor belt 62 can smoothly transition from the surface of the auxiliary roller 52. In addition, the setting height of the auxiliary roller 52 can be designed according to the actual height of the roller support 6 where the lower roller 63 is installed on site. It needs to be designed so that when the first bearing groove 31 pushes the old lower roller 63 out of the roller support 6, the auxiliary roller 52 can lift the conveyor belt 62, and the moving device 2 can just move the replaced lower roller 63 horizontally out.

[0042] When replacing the lower idler roller 63, the working platform 12 of the scissor-type hydraulic lifting mechanism is raised. During the raising process, the first bearing groove 31 is raised synchronously, pushing the damaged lower idler roller 63 upward. Even if the shaft end of the lower idler roller 63 is higher than the top of the slot 61 of the idler roller bracket 6, the auxiliary idler roller 52 holds the conveyor belt 62. Then, the stepper motor 221 in the screw drive mechanism 21 drives the screw 23 to rotate, so that the first bearing groove 31 and the second bearing groove 32 move laterally along the guide rail 41 until the new lower idler roller 63 in the second bearing groove 32 moves directly above the slot 61 of the idler roller bracket 6 where the original lower idler roller 63 was installed. Then the working platform 12 descends until the new lower idler roller 63 just falls into the slot 61 of the idler roller bracket 6. It continues to descend, and the new lower idler roller 63 separates from the second bearing groove 32. The damaged lower idler roller 63 in the first bearing groove 31 descends synchronously, thus completing the disassembly and replacement of the entire lower idler roller 63.

[0043] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the technical solution of this application, and these all fall within the scope of protection of this application.

Claims

1. A device for changing the lower idler roller of a belt conveyor, characterized in that: The device includes a lifting platform (1) and a moving device (2) arranged on the surface of the lifting platform (1). The moving device (2) is connected to a first bearing groove (31) and a second bearing groove (32). The lifting platform (1) and the moving device (2) drive the first bearing groove (31) and the second bearing groove (32) to move in the vertical and horizontal directions. The first bearing groove (31) can remove the old lower roller (63) when the lifting platform (1) rises, and the second bearing groove (32) can place a new lower roller (63) when the lifting platform (1) falls.

2. The belt conveyor lower idler roller replacement device according to claim 1, characterized in that: The lifting platform (1) is a scissor lift (11), and the moving device (2) is a screw drive mechanism (21). The screw drive mechanism (21) is set on the working platform (12) of the scissor lift (11).

3. The belt conveyor lower idler roller replacement device according to claim 2, characterized in that: The scissor lift (11) includes a base (13) set below the working platform (12). The two sides of the base (13) are connected to the working platform (12) through scissor arms (14), and a hydraulic cylinder (15) is provided in the middle to connect to the working platform (12). Rollers (16) are also installed on the bottom surface.

4. The belt conveyor lower idler roller replacement device according to claim 2, characterized in that: The lead screw transmission mechanism (21) includes a connected drive motor (22) and a lead screw (23). The first bearing groove (31) and the second bearing groove (32) are arranged side by side on the working platform (12) and are sleeved on the lead screw (23) and threaded together.

5. The belt conveyor lower idler roller replacement device according to claim 4, characterized in that: The lead screw (23) passes vertically through the lower part of the first bearing groove (31) and the lower part of the second bearing groove (32) in the horizontal direction. The groove structure of the first bearing groove (31) and the groove structure in the second bearing groove (32) are both matched with the lower roller (63).

6. The belt conveyor lower idler roller replacement device according to claim 4, characterized in that: The drive motor (22) is a stepper motor (221). The lead screw transmission mechanism (21) also includes a coupling (24) connecting the output shaft of the stepper motor (221) and the lead screw (23). One end of the lead screw (23) near the coupling (24) is provided with a transmission seat (25), and the other end is provided with a support seat (26). Bearings are provided in both the transmission seat (25) and the support seat (26), and the lead screw (23) passes through the bearings of both.

7. The belt conveyor lower idler roller replacement device according to claim 6, characterized in that: The bottom ends of the first bearing groove (31) and the second bearing groove (32) are respectively connected to sliders (4), and a guide rail (41) is provided below the slider (4), and the slider (4) can slide on the guide rail (41).

8. The belt conveyor lower idler roller replacement device according to claim 7, characterized in that: The guide rail (41) is parallel to the lead screw (23); a groove (42) extending along its length is provided on one side of the guide rail (41), and the slider (4) is embedded in the groove (42) and can slide in the groove (42).

9. An auxiliary device, characterized in that: When used in conjunction with the belt conveyor lower idler replacement device according to any one of claims 1-8, the auxiliary device (5) is arranged on both sides of the moving device (2), and its top surface is higher than the top surface of the moving device (2), so as to lift the conveyor belt (62) when the lifting platform (1) rises.

10. An auxiliary device (5) according to claim 9, characterized in that: The auxiliary device (5) includes an auxiliary bracket (51) and an auxiliary roller (52). The auxiliary bracket (51) is fixed on the surface of the work platform (12), and the two ends of the auxiliary roller (52) are engaged in the slots (61) of the auxiliary bracket (51).

Images