Photovoltaic panel frame angle twisting device

Abstract

The utility model relates to an angle twisting device for a photovoltaic panel frame. The angle twisting device for the photovoltaic panel frame comprises a box body, the four corner rubbing boxes correspond to the four corners of the photovoltaic panel frame in a one-to-one mode, each corner rubbing box can move in the front-back direction and the left-right direction, each corner rubbing box comprises a box body, and a notch is formed in the side, facing the corresponding corner of the photovoltaic panel frame, of each box body; three rotating rollers are rotationally assembled in the box body, the three rotating rollers are in transmission connection through a belt, the side face, opposite to the rotating rollers, of the belt is a polishing face used for rubbing the corners of the frame, and the polishing face, between two rotating rollers, of the belt corresponds to the notches. When the photovoltaic panel frame corner twisting device is used, operation is convenient, corner twisting operation can be carried out on the four corners of a photovoltaic panel frame without turning over the photovoltaic panel frame, meanwhile, corner twisting operation can be carried out on the four corners of the photovoltaic panel frame at the same time, operation is easy and convenient, and meanwhile corner twisting efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic panel frame grinding, in particular to a photovoltaic panel frame corner grinding device. Background Art

[0002] Traditional photovoltaic panel frames use metal aluminum as the main material. However, when the frame is initially formed, its corner surface is usually rough and needs further polishing before it can be put into use for better results.

[0003] In the prior art, the photovoltaic panel frame is generally polished by continuously pushing the photovoltaic panel frame close to the polishing parts of the machine. For the polishing of the corners of the photovoltaic frame, the photovoltaic frame needs to be constantly turned over to change the polishing surface. This repetition reduces the polishing efficiency. Utility Model Content

[0004] The utility model provides a photovoltaic panel frame corner rubbing device to solve the technical problems of troublesome and low efficiency in polishing the existing photovoltaic panel frame.

[0005] In order to solve the above problems, the utility model provides a photovoltaic panel frame corner rubbing device adopts the following technical solution: comprising a box body, with the length direction of the box body as the front-to-back direction and the height direction as the up-down direction;

[0006] There are four corner rubbing boxes, which correspond to the four corners of the photovoltaic panel frame one by one. Each corner rubbing box can move in the front-to-back direction and the left-to-right direction. The corner rubbing box includes a box body, and a notch is opened on the side of the box body facing the inside of the box body; three rotating rollers are rotatably installed in the box body, and the three rotating rollers are connected by belt transmission, and the side of the belt facing away from the rotating roller is a polishing surface for rubbing the corners of the frame, and the polishing surface of the belt between two rotating rollers is arranged corresponding to the notch.

[0007] The beneficial effect is that when the photovoltaic panel frame angle rubbing device of the utility model is used, the photovoltaic panel frame is first placed in the box, and then the angle rubbing box is driven to move in the front, back, left and right directions until the four corners of the photovoltaic panel frame are in the corresponding notches, and then the rotating roller is rotated so that the grinding surface of the belt performs angle rubbing operation on the corresponding corners of the photovoltaic panel frame. When the photovoltaic panel frame angle rubbing device of the utility model is used, it is easy to operate, and the four corners of the photovoltaic panel frame can be rubbed without flipping the photovoltaic panel frame. At the same time, the four corners of the photovoltaic panel frame can also be rubbed at the same time. The operation is simple and the angle rubbing efficiency is high.

[0008] Furthermore, a conveyor belt extending in the left-right direction is provided in the box body, and the conveyor belt is used to convey the photovoltaic panel frame into the box body. Conveying openings corresponding to the conveyor belt are also opened on the side walls on both sides of the box body.

[0009] Beneficial effect: It is convenient to transport the photovoltaic panel frame into the box and transport the photovoltaic panel frame out of the box, which is convenient for staff to operate.

[0010] Furthermore, a driving plate is provided in the box body, a driving motor is provided on the driving plate, and a driving rod extending in the front-to-back direction is coaxially fixed to the output shaft of the driving motor; three conveyor belts are arranged at intervals in the front-to-back direction, and the driving wheels of the three conveyor belts are coaxially arranged and coaxially fixed to the driving rod.

[0011] Beneficial effect: Improve the stability of the photovoltaic panel frame transported by the conveyor belt, while saving the cost required to drive the conveyor belt, reducing costs and saving money.

[0012] Furthermore, two pairs of longitudinal linear modules and two transverse linear modules are provided in the box, the two pairs of longitudinal linear modules are placed on the left and right sides of the box, the two transverse linear modules are placed on the two pairs of longitudinal linear modules, and the left and right ends of the transverse linear modules are respectively slidably assembled on the corresponding two longitudinal linear modules, wherein two corner rubbing boxes are slidably assembled on one of the transverse linear modules, and the other two corner rubbing boxes are slidably assembled on the other transverse linear module.

[0013] Beneficial effects: simple structure and easy operation.

[0014] Furthermore, one of the three rotating rollers is a driving roller, and the other two are driven rollers. A driving motor is provided at the lower end of the box body, and the output shaft of the driving motor is coaxially fixed with the driving roller.

[0015] Beneficial effect: Only one active motor is needed to drive the three rotating rollers to rotate, thus saving costs.

[0016] Furthermore, the box body is a rectangular box, and a notch is opened at the corner of the box body facing the inside of the box body, and the two side walls at the notch are respectively connected to a baffle plate that is perpendicular to the corresponding side wall; a through hole is also opened on the bottom plate of the box body at the position corresponding to the notch, which penetrates the bottom plate of the box body in the up and down direction, and the lower end of the through hole is connected to a chip removal channel.

[0017] Beneficial effect: It is convenient to collect the debris generated by rubbing the corners, so as to avoid the debris from polluting the environment. At the same time, it can also prevent the debris from entering the box body, and prevent the equipment inside the box body from being polluted by the debris and damaged.

[0018] Furthermore, a guide block is provided on the bottom plate of the box body at the notch. The guide block is a rectangular block and is provided with a guide slope. The lower end of the guide slope is below the lower end surface of the photovoltaic panel frame, and the upper end surface of the guide block is above the lower end surface of the photovoltaic panel frame.

[0019] Beneficial effect: The four corners of the photovoltaic panel frame are supported by the guide blocks at the four notches, so as to avoid the photovoltaic panel frame from shaking when the corners of the photovoltaic panel frame are polished, thereby ensuring the stability of the corner rubbing operation.

[0020] Furthermore, a detection mechanism is provided inside the box body, and the detection mechanism includes a pressure sensor arranged on the bottom plate of the box body and a transmission plate in contact with the pressure sensitive element of the pressure sensor. A fixed rod is provided on the transmission plate, and a mounting sleeve is provided on the fixed rod. The end of the mounting sleeve facing away from the fixed rod is also rotatably equipped with a roller, and the roller contacts the belt. The end of the mounting sleeve facing the transmission plate is also provided with a spring mounted on the fixed rod, and the spring is always in a compressed state.

[0021] Beneficial effect: The pressure data is detected by the pressure sensor, and the tension of the belt is detected, so that the belt can be replaced in time when the belt is loose, thereby ensuring the quality of the angle rubbing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0023] Figure 1 This is a schematic structural diagram of a photovoltaic panel frame corner rubbing device of the utility model;

[0024] Figure 2 This is a top view of a photovoltaic panel frame corner rubbing device of the utility model;

[0025] Figure 3 This is a cross-sectional view of a photovoltaic panel frame corner rubbing device of the utility model;

[0026] Figure 4 for Figure 1 The enlarged schematic diagram at A in the middle;

[0027] Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0028] Figure 6 This is a schematic diagram of the internal structure of a corner rubbing box of a photovoltaic panel frame corner rubbing device of the utility model;

[0029] Figure 7 This is a schematic diagram of the internal structure of a corner rubbing box of a photovoltaic panel frame corner rubbing device of the utility model;

[0030] Figure 8 for Figure 7 Enlarged schematic diagram at point C in the middle.

[0031] Description of reference numerals:

[0032] 1. Box body; 2. Corner rubbing box; 3. Box body; 4. Belt; 5. Conveyor belt; 6. Photovoltaic panel frame; 7. Conveying port; 8. Driving plate; 9. Driving motor; 10. Driving rod; 11. Driving wheel; 12. Longitudinal linear module; 13. Horizontal linear module; 14. Active roller; 15. Driven roller; 16. Active motor; 17. Baffle; 18. Perforation; 19. Chip removal channel; 20. Guide block; 21. Guide slope; 22. Pressure sensor; 23. Pressure sensitive element; 24. Transmission plate; 25. Fixed rod; 26. Mounting sleeve; 27. Roller; 28. Polishing surface. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0034] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0035] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0036] Embodiment 1 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0037] like Figures 1 to 8 As shown, a photovoltaic panel frame corner rubbing device of the utility model comprises a box body 1, a conveyor belt 5 and a corner rubbing box 2. The box body 1 is a rectangular parallelepiped structure as a whole, and the length direction of the box body 1 is defined as the front-to-back direction, and the height direction is the up-down direction.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, conveying openings 7 are provided on the side walls on both sides of the box body 1 , and the size of the conveying openings 7 matches the size of the photovoltaic panel frame 6 so that the photovoltaic panel frame 6 can enter and exit the box body 1 .

[0039] like Figure 4 As shown, a driving plate 8 is provided in the box body 1, a driving motor 9 is provided on the driving plate 8, and a driving rod 10 extending in the front-rear direction is coaxially fixed on the output shaft of the driving motor 9.

[0040] There are three conveyor belts 5, which are arranged inside the box body 1 at intervals along the front-rear direction, and the driving wheels 11 of the three conveyor belts 5 are coaxially fixed on the driving rod 10. The three conveyor belts 5 are arranged corresponding to the conveying port 7.

[0041] like Figure 2 As shown, two pairs of longitudinal linear modules 12 and two transverse linear modules 13 are further provided in the box 1 . The two pairs of longitudinal linear modules 12 are respectively arranged at the front and rear ends of the box 1 , and the two pairs of longitudinal linear modules 12 are respectively arranged at the left and right sides of the box 1 .

[0042] The two transverse linear modules 13 are respectively disposed on the two pairs of longitudinal linear modules 12 , and the left and right ends of the transverse linear modules 13 are respectively slidably assembled on the corresponding two longitudinal linear modules 12 .

[0043] like Figure 2 and Figure 5 As shown, there are four corner rubbing boxes 2, which correspond one to one with the four corners of the photovoltaic panel frame 6, and two of the corner rubbing boxes 2 are slidably assembled on one of the horizontal linear modules 13, and the other two corner rubbing boxes 2 are slidably assembled on the other horizontal linear module 13.

[0044] like Figure 6 and Figure 7 As shown, the corner rubbing box 2 includes a rectangular box body 3, three rotating rollers arranged inside the box body 3, and a detection mechanism arranged inside the box body 3.

[0045] The box body 3 has a notch facing the corner of the photovoltaic panel frame 6. The notch is formed at the corner of the box body 3. The two side walls of the box body 3 at the notch are respectively connected with a baffle 17 perpendicular to the corresponding side wall.

[0046] A through hole 18 penetrating the bottom plate of the box body 3 in the up-down direction is further provided at a position corresponding to the notch on the bottom plate of the box body 3 , and a chip removal channel 19 is connected to the lower end of the through hole 18 .

[0047] A guide block 20 is also provided at the notch. The guide block 20 is a rectangular block and is provided with a guide slope 21. The lower end of the guide slope 21 is below the lower end surface of the photovoltaic panel frame 6, and the upper end surface of the guide block 20 is above the lower end surface of the photovoltaic panel frame 6.

[0048] An active motor 16 is also provided at the lower end of the bottom plate of the box body 3 .

[0049] The three rotating rollers are all rotatably mounted on the bottom plate of the box body 3, and one of the rotating rollers is a driving roller 14, and the other two are driven rollers 15. The driving roller 14 is coaxially fixed on the output shaft of the driving motor 16.

[0050] The three rotating rollers are connected by a belt 4, and the side of the belt 4 facing away from the rotating roller is a polishing surface 28 for rubbing the corners of the photovoltaic panel frame 6. The polishing surface 28 of the belt 4 between the two driven rollers 15 is set corresponding to the notch.

[0051] like Figure 8 As shown, the detection mechanism includes a pressure sensor 22 disposed on the bottom plate of the box body 3 and a transmission plate 24 in contact with the pressure sensitive element 23 of the pressure sensor 22, and a fixed rod 25 is fixed on the transmission plate 24. A mounting sleeve 26 is sleeved on the fixed rod 25, and a roller 27 is rotatably mounted on the end of the mounting sleeve 26 facing away from the fixed rod 25, and the roller 27 contacts the belt 4. A spring sleeved on the fixed rod 25 is also provided on the end of the mounting sleeve 26 facing the transmission plate 24, and the spring is always in a compressed state.

[0052] When the photovoltaic panel frame 6 corner rubbing device of the utility model is used, the driving motor 9 is first started to convey the photovoltaic panel frame 6 to the inside of the box body 1 along the conveyor belt 5, and then the corner rubbing box 2 is first driven to move left and right on the horizontal linear module 13 until the notches of each corner rubbing box 2 correspond to the corners corresponding to the photovoltaic panel frame 6 in the front-to-back direction, and then the horizontal linear module 13 is driven to move back and forth on the longitudinal linear module 12, so that the lower end surface of the photovoltaic panel frame 6 contacts the corresponding guide inclined surface 21, and then the horizontal linear module 13 continues to move. Then the photovoltaic panel frame 6 is moved along the guide slope 21 to the upper end surface of the guide block 20, so that the photovoltaic panel frame 6 is supported on the upper end surface of the guide block 20, until the corner of the photovoltaic panel frame 6 contacts the polished surface 28 of the belt 4 of the corresponding corner rubbing box 2, and then the active motor 16 is started again to rotate the active roller 14, thereby driving the driven roller 15 to rotate, and then the belt 4 is rotated, and then the polished surface 28 of the belt 4 can rub the corner of the photovoltaic panel frame 6, and the debris generated by rubbing is discharged and collected along the chip discharge channel 19. After the corner rubbing operation is completed, the horizontal support module and the corner rubbing box 2 are moved to make the photovoltaic panel frame 6 fall back to the conveyor belt 5, and then the drive motor 9 is started again to transport the photovoltaic panel frame 6 to the box 1.

[0053] When the photovoltaic panel frame corner rubbing device of the utility model is in use, the entire process is automatically completed by mechanical equipment. There is no need for manual flipping of the photovoltaic panel frame to rub the corners of the photovoltaic panel frame. At the same time, the four corners of the photovoltaic panel frame can be rubbed at the same time, thereby improving the corner rubbing efficiency, reducing the corner rubbing time, and thus reducing time costs.

[0054] Embodiment 2 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0055] The main difference between it and Example 1 is that in Example 1, a conveyor belt extending in the left-right direction is also provided in the box body, and the conveyor belt is used to transport the photovoltaic panel frame into the box body. Conveying openings corresponding to the conveyor belt are also opened on the side walls on both sides of the box body.

[0056] In this embodiment, a support platform can also be provided in the box, and in this case, the staff can manually place the photovoltaic panel frame on the support platform along the conveying port.

[0057] Embodiment 3 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0058] The main difference between it and Example 1 is that: in Example 1, a driving plate is also provided in the box body, a driving motor is provided on the driving plate, and a driving rod extending in the front-to-back direction is coaxially fixed on the output shaft of the driving motor; three conveyor belts are arranged at intervals in the front-to-back direction, and the driving wheels of the three conveyor belts are coaxially arranged and coaxially fixed on the driving rod.

[0059] In this embodiment, a driving motor can also be connected to the driving wheel of each conveyor belt.

[0060] Embodiment 4 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0061] The main difference between it and Example 1 is that: in Example 1, two pairs of longitudinal linear modules and two transverse linear modules are provided in the box body, the two pairs of longitudinal linear modules are placed on the left and right sides of the inside of the box body, the two transverse linear modules are placed on the two pairs of longitudinal linear modules, and the left and right ends of the transverse linear modules are respectively slidably assembled on the corresponding two longitudinal linear modules, among which two corner rubbing boxes are slidably assembled on one of the transverse linear modules, and the other two corner rubbing boxes are slidably assembled on the other transverse linear module.

[0062] In this embodiment, two pairs of longitudinal slides and two transverse slides are provided in the box body, and the two pairs of longitudinal slides are disposed on the left and right sides of the inside of the box body, and the two transverse slides are disposed on the two pairs of longitudinal slides, and the left and right ends of the transverse slides are respectively slidably assembled on the corresponding two longitudinal slides, wherein two corner rubbing boxes are slidably assembled on one of the transverse slides, and the other two corner rubbing boxes are slidably assembled on the other transverse slide. At this time, telescopic cylinders are arranged on the transverse slides and the longitudinal slides to drive the transverse slides and the corner rubbing boxes to move.

[0063] Embodiment 5 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0064] The main difference between it and Example 1 is that in Example 1, one of the three rotating rollers is a driving roller, and the other two are driven rollers. A driving motor is provided at the lower end of the box body, and the output shaft of the driving motor is coaxially fixed with the driving roller.

[0065] In this embodiment, the three rotating rollers can also be active rollers. In this case, an active motor is provided at the lower end of each rotating roller. The output shaft of the active motor is coaxially fixed with the corresponding active roller, and each active motor runs synchronously.

[0066] Embodiment 6 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0067] The main difference between it and Example 1 is that in Example 1, the box body is a rectangular box, the notch is opened at the corner of the box body facing the inside of the box body, and the two side walls at the notch are respectively connected to a baffle that is perpendicular to the corresponding side wall.

[0068] In this embodiment, the box body can also be a circular box, in which case the notch is formed on the radius of the box body side wall toward the center of the box body, and the two baffles extend along the radius of the box body and are perpendicular to each other.

[0069] Embodiment 7 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0070] The main difference between it and Example 1 is that in Example 1, a guide block is also provided on the bottom plate of the box body at the notch, the guide block is a rectangular block and a guide slope is provided on the guide block, the lower end of the guide slope is below the lower end surface of the photovoltaic panel frame, and the upper end surface of the guide block is above the lower end surface of the photovoltaic panel frame.

[0071] In this embodiment, no guide block is provided.

[0072] Embodiment 8 of a photovoltaic panel frame corner rubbing device provided by the utility model:

[0073] The main difference between it and Example 1 is that: in Example 1, a detection mechanism is also provided inside the box body, the detection mechanism includes a pressure sensor arranged on the bottom plate of the box body and a transmission plate in contact with the pressure sensitive element of the pressure sensor, a fixed rod is provided on the transmission plate, a mounting sleeve is sleeved on the fixed rod, the end of the mounting sleeve facing away from the fixed rod is also rotatably equipped with a roller, the roller is in contact with the belt, and the end of the mounting sleeve facing the transmission plate is also provided with a spring sleeved on the fixed rod, and the spring is always in a compressed state.

[0074] In this embodiment, no detection mechanism is provided, and the upper wall of the box body is not provided at this time. The staff observes the looseness of the belt with the naked eye to ensure the quality of the corners of the belt facing the photovoltaic panel frame.

[0075] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0076] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A photovoltaic panel frame corner rubbing device, characterized in that: include: The box body has the length direction of the box body as the front-to-back direction and the height direction as the up-down direction; There are four corner rubbing boxes, which correspond to the four corners of the photovoltaic panel frame one by one. Each corner rubbing box can move in the front-to-back direction and the left-to-right direction. The corner rubbing box includes a box body, and a notch is provided on the side of the box body facing the corner corresponding to the photovoltaic panel frame. Three rotating rollers are rotatably installed in the box body, and the three rotating rollers are connected by belt transmission, and the side surface of the belt facing away from the rotating roller is a polishing surface for rubbing the corners of the frame, wherein the polishing surface of the belt between two rotating rollers is arranged corresponding to the notch.

2. A photovoltaic panel frame corner rubbing device according to claim 1, characterized in that: A conveyor belt extending in the left-right direction is also provided in the box body. The conveyor belt is used to transport the photovoltaic panel frame into the box body. Conveying openings corresponding to the conveyor belt are also opened on the side walls on both sides of the box body.

3. A photovoltaic panel frame corner rubbing device according to claim 2, characterized in that: A driving plate is also provided in the box body, on which a driving motor is arranged, and a driving rod extending in the front-to-back direction is coaxially fixed to the output shaft of the driving motor; three conveyor belts are arranged at intervals in the front-to-back direction, and the driving wheels of the three conveyor belts are coaxially arranged and coaxially fixed to the driving rod.

4. A photovoltaic panel frame corner rubbing device according to any one of claims 1 to 3, characterized in that: Two pairs of longitudinal linear modules and two transverse linear modules are provided in the box. The two pairs of longitudinal linear modules are placed on the left and right sides of the box. The two transverse linear modules are placed on the two pairs of longitudinal linear modules. The left and right ends of the transverse linear modules are respectively slidably assembled on the corresponding two longitudinal linear modules. Two corner rubbing boxes are slidably assembled on one of the transverse linear modules, and the other two corner rubbing boxes are slidably assembled on the other transverse linear module.

5. A photovoltaic panel frame corner rubbing device according to any one of claims 1 to 3, characterized in that: One of the three rotating rollers is a driving roller, and the other two are driven rollers. A driving motor is arranged at the lower end of the box body, and an output shaft of the driving motor is coaxially fixed with the driving roller.

6. A photovoltaic panel frame corner rubbing device according to any one of claims 1 to 3, characterized in that: The box body is a rectangular box, with a notch opened at the corner of the box body facing the inside of the box body, and the two side walls at the notch are respectively connected to a baffle plate that is perpendicular to the corresponding side wall; a through hole is also opened on the bottom plate of the box body at the position corresponding to the notch, which penetrates the bottom plate of the box body in the up and down direction, and the lower end of the through hole is connected to a chip removal channel.

7. A photovoltaic panel frame corner rubbing device according to any one of claims 1 to 3, characterized in that: A guide block is also provided on the bottom plate of the box body at the notch. The guide block is a rectangular block and is provided with a guide slope. The lower end of the guide slope is below the lower end surface of the photovoltaic panel frame, and the upper end surface of the guide block is above the lower end surface of the photovoltaic panel frame.

8. A photovoltaic panel frame corner rubbing device according to any one of claims 1 to 3, characterized in that: A detection mechanism is also provided inside the box body, which includes a pressure sensor arranged on the bottom plate of the box body and a transmission plate in contact with the pressure sensitive element of the pressure sensor. A fixed rod is provided on the transmission plate, and a mounting sleeve is sleeved on the fixed rod. The end of the mounting sleeve facing away from the fixed rod is also rotatably equipped with a roller, and the roller contacts the belt. The end of the mounting sleeve facing the transmission plate is also provided with a spring sleeved on the fixed rod, and the spring is always in a compressed state.

Images