Intelligent centering conveyor for glass

Abstract

The utility model discloses an intelligent centering conveyor for glass, which relates to the field of glass conveying equipment and comprises a main machine conveying line, a limiting mechanism, a centering mechanism, a centering guide mechanism and a support frame, the main machine conveying line is mounted above the support frame, and the centering mechanism is mounted at the bottom of the support frame. The working end of the centering mechanism extends upwards to the position above the supporting frame, and a limiting mechanism is arranged at the output end of the main machine conveying line. The main machine conveying line, the limiting mechanism and the centering mechanism are all electrically connected with the PLC. In the conveying process, autonomous positioning stop and centering righting operation of the glass are achieved, and it is guaranteed that the glass is conveyed in the middle on a main machine conveying line.

Description

Technical Field

[0001] The utility model relates to the field of glass conveying equipment, in particular to an intelligent glass centering conveyor. Background Art

[0002] During the glass processing, the glass cannot be accurately placed in the middle of the conveyor line when loading or the conveyor line is too long, causing the glass to deviate from its position during transportation. This affects the dimensional accuracy of the processing, is not conducive to improving the quality of the product, and also brings trouble to the operation of the next process. In severe cases, the glass may be broken due to bumps.

[0003] At present, the straightening is performed manually during the conveying process, which not only has certain risks during the operation, but is also not conducive to improving production efficiency.

[0004] Therefore, how to develop an intelligent glass centering conveyor to realize autonomous positioning, stopping and centering operations of the glass during the conveying process to ensure the centered transportation of the glass on the main conveyor line has become a difficult problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0005] The utility model aims to provide a glass intelligent centering conveyor, which can realize autonomous positioning, stopping and centering and straightening operations of glass during the conveying process, so as to ensure the centering transportation of glass on the main machine conveying line.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model discloses an intelligent centering conveyor for glass, comprising a main conveying line, a limiting mechanism, a centering mechanism, a centering guide mechanism and a support frame, wherein the main conveying line is installed above the support frame, the centering mechanism is installed at the bottom of the support frame, and the working end of the centering mechanism extends upward to the top of the support frame, and the output end of the main conveying line is provided with the limiting mechanism; the main conveying line, the limiting mechanism and the centering mechanism are all electrically connected to a PLC controller.

[0008] Preferably, the main machine conveyor line includes a transmission shaft, a synchronous belt and a transmission motor. The multiple transmission shafts are arranged in parallel and rotatably connected to the top of the support frame through a bearing seat, and every two adjacent transmission shafts are connected through the synchronous belt transmission. The transmission motor is installed on one side of the support frame through a first transmission motor fixing plate. The transmission motor is connected to the first reducer through transmission. The transmission shaft adjacent to the first reducer is connected to the power output end of the first reducer through the synchronous belt, and the transmission motor is electrically connected to the PLC controller.

[0009] Preferably, the transmission shaft includes a transmission shaft body, a multi-directional wheel and a synchronous pulley, and multiple transmission shaft bodies are rotatably connected to the bearing seat. The synchronous pulley is arranged at one end of the transmission shaft body and is used to be rotatably connected to the synchronous belt, and multiple multi-directional wheels for conveying glass are evenly distributed on the transmission shaft body.

[0010] Preferably, the centering mechanism includes a linear module, an aluminum profile support arm and a clamp, the fixed end of the linear module is connected to the bottom of the middle rod of the support frame, the ends of the power output shafts arranged on both sides of the linear module are respectively rotatably connected to the two sides of the support frame, the aluminum profile support arm is threadedly connected to the power output shaft of the linear module, the clamp is fixedly connected to the top of the aluminum profile support arm, and the linear module is electrically connected to the PLC controller.

[0011] Preferably, the linear module includes a servo motor, a second reducer, a forward and reverse screw, a second transmission motor fixing plate, a second fixed seat, a coupling and a screw fixing plate. The servo motor and the second reducer are both installed on the bottom of the middle rod of the support frame through the second transmission motor fixing plate. The power input end of the second reducer is rotationally connected to the power output end of the servo motor. The two forward and reverse screws are symmetrically arranged on both sides of the servo motor, and one end of the forward and reverse screws is rotationally connected to the support frame through the second fixed seat, and the other end of the forward and reverse screws is rotationally connected to the power output end of the second reducer through a coupling. The aluminum profile support arm is connected to the forward and reverse screws through a screw fixing plate threaded sleeve, and the servo motor is electrically connected to the PLC controller.

[0012] Preferably, the clamp comprises a clamp fixing plate and a polymer plate, the bottom of the clamp fixing plate is connected to the top of the aluminum profile support arm, and the polymer plate is connected to the top of the clamp fixing plate.

[0013] Preferably, the centering guide mechanism includes a guide shaft, a linear bearing and a first connecting plate, the guide shaft is fixedly connected to the bottom of the support frame through a first fixed seat, the linear bearing sliding sleeve is connected to the guide shaft, the first connecting plate is fixedly connected to the linear bearing, and the centering mechanism is slidably connected to the support frame through the first connecting plate.

[0014] Preferably, the limiting mechanism includes a limiting block, a rotating rod, a third fixed seat and a driving assembly, both ends of the rotating rod are rotatably connected to the support frame through the third fixed seat, a plurality of limiting blocks for positioning and intercepting glass are evenly distributed on the rotating rod, the fixed end of the driving assembly is installed at the bottom of the middle rod of the support frame, the output end of the driving assembly is transmission-connected to the rotating rod and drives the limiting block on the rotating rod to flip and limit, and the driving assembly is electrically connected to the PLC controller.

[0015] Preferably, the driving assembly includes a stepper motor, a third transmission motor fixing plate, a first transmission pulley, a second transmission pulley and a transmission belt, the stepper motor is installed at the bottom of the middle rod of the support frame through the third transmission motor fixing plate, the first transmission pulley is transmission-connected to the power output end of the stepper motor, the second transmission pulley is fixedly sleeved and connected to the rotating rod, the first transmission pulley and the second transmission pulley are transmission-connected through the transmission belt, and the stepper motor is electrically connected to the PLC controller.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] 1) The setting of the limit mechanism plays the role of stopping the glass at a fixed point on the main machine conveyor line. When the glass is transported to the specified position of the main machine conveyor line, the stepper motor drives the rotating rod and the multiple limit blocks set on the rotating rod to rotate 180 degrees in the clockwise or counterclockwise direction until the glass abuts against the limit blocks, completing the positioning and stopping operation of the glass on the main machine conveyor line;

[0018] 2) The setting of the centering mechanism: the servo motor transmits the rotational power to the second reducer, and the second reducer drives the positive and negative lead screws arranged on both sides to rotate in the same direction, so that the aluminum profile arms respectively installed on the two positive and negative lead screws can achieve the operation of approaching the glass at the same time, and finally the polymer plate arranged on the clamping claw completes the alignment operation of the glass on the machine conveyor line, ensuring the centering transportation of the glass on the main machine conveyor line.

[0019] In general, the utility model has a simple structure and is easy to use. Through the cooperation between the limiting mechanism and the centering mechanism, the autonomous positioning, stopping and centering operations of the glass are realized during the transportation process, ensuring the centered transportation of the glass on the main machine conveyor line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a glass intelligent centering conveyor of the utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure between the main machine conveying line and the support frame of the utility model;

[0023] Figure 3 For this utility model Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 For this utility model Figure 2 The enlarged view of point B in the middle;

[0025] Figure 5 This is a schematic diagram of the connection structure between the centering mechanism and the support frame of the utility model;

[0026] Figure 6 For this utility model Figure 5 Enlarged view of point C in the middle;

[0027] Figure 7 This is a schematic diagram of the connection structure between the centering guide mechanism and the support frame of the utility model;

[0028] Figure 8 This is a schematic diagram of the connection structure between the limiting mechanism and the support frame of the utility model;

[0029] Fig. 9 For this utility model Figure 8 Enlarged view of point D in the middle.

[0030] Description of the accompanying drawings: 1. Main machine conveyor line; 101. Bearing seat; 102. Transmission shaft; 1021. Transmission shaft body; 1022. Multi-directional wheel; 1023. Synchronous pulley; 103. Synchronous belt; 104. Transmission motor; 105. First reducer; 106. First transmission motor fixing plate; 2. Limiting mechanism; 201. Limiting block; 202. Rotating rod; 203. Third fixing seat; 204. Driving assembly; 2041. Stepping motor; 2042. Third transmission motor fixing plate; 2043. First transmission pulley; 2044. Second transmission pulley ; 2045, transmission belt; 3, centering mechanism; 301, linear module; 3011, servo motor; 3012, second reducer; 3013, forward and reverse screws; 3014, second transmission motor fixing plate; 3015, second fixed seat; 3016, coupling; 3017, screw fixing plate; 302, aluminum profile support arm; 303, clamping jaw; 3031, clamping jaw fixing plate; 3032, polymer plate; 4, centering guide mechanism; 401, guide shaft; 402, linear bearing; 403, first connecting plate; 404, first fixed seat; 5, support frame. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] like Figure 1-9 As shown, a glass intelligent centering conveyor includes a main conveyor line 1, a limiting mechanism 2, a centering mechanism 3, a centering guide mechanism 4 and a support frame 5, wherein the main conveyor line 1 is installed above the support frame 5, the centering mechanism 3 is installed at the bottom of the support frame 5, and the working end of the centering mechanism 3 extends upward to the top of the support frame 5, and the limiting mechanism 2 is provided at the output end of the main conveyor line 1; the main conveyor line 1, the limiting mechanism 2 and the centering mechanism 3 are all electrically connected to the PLC controller.

[0033] Specifically, Figure 2-4 As shown, the main machine conveyor line 1 includes a transmission shaft 102, a synchronous belt 103 and a transmission motor 104. The multiple transmission shafts 102 are arranged in parallel and are rotatably connected to the top of the support frame 5 through a bearing seat 101, and every two adjacent transmission shafts 102 are transmission-connected through the synchronous belt 103. The transmission motor 104 is installed on one side of the support frame 5 through a first transmission motor fixing plate 106. The transmission motor 104 is transmission-connected to the first reducer 105. The transmission shaft 102 adjacent to the first reducer 105 is transmission-connected to the power output end of the first reducer 105 through the synchronous belt 103, and the transmission motor 104 is electrically connected to the PLC controller.

[0034] Specifically, the transmission shaft 102 includes a transmission shaft body 1021, a multi-directional wheel 1022 and a synchronous pulley 1023. A plurality of the transmission shaft bodies 1021 are rotatably connected to the bearing seat 101. The synchronous pulley 1023 is arranged at one end of the transmission shaft body 1021 and is used to be rotatably connected to the synchronous belt 103. A plurality of multi-directional wheels 1022 for conveying glass are evenly distributed on the transmission shaft body 1021. Specifically, when the main conveyor line 1 is working, the transmission motor 104 provides the power required for conveying glass. After the rotation force provided by the output end of the transmission motor 104 is decelerated and converted by the first reducer 105, the transmission shaft body 1021 arranged equidistantly and the plurality of multi-directional wheels 1022 arranged on the transmission shaft body 1021 are driven to rotate together through the synchronous belt 103 and the synchronous pulley 1023, thereby realizing the conveying operation of the glass; specifically, the setting of the multi-directional wheel 1022 assists the centering mechanism 3 in completing the adjustment operation of the lateral position of the glass.

[0035] Specifically, Figure 5-6As shown, the centering mechanism 3 includes a linear module 301, an aluminum profile support arm 302 and a clamp 303. The fixed end of the linear module 301 is connected to the bottom of the middle rod of the support frame 5. The ends of the power output shafts arranged on both sides of the linear module 301 are respectively rotatably connected to the two sides of the support frame 5. The aluminum profile support arm 302 is threadedly connected to the power output shaft of the linear module 301. The clamp 303 is fixedly connected to the top of the aluminum profile support arm 302. The linear module 301 is electrically connected to the PLC controller.

[0036] Specifically, the linear module 301 includes a servo motor 3011, a second reducer 3012, a forward and reverse lead screw 3013, a second transmission motor fixing plate 3014, a second fixing seat 3015, a coupling 3016 and a lead screw fixing plate 3017. The servo motor 3011 and the second reducer 3012 are both installed at the bottom of the middle rod of the support frame 5 through the second transmission motor fixing plate 3014. The power input end of the second reducer 3012 is rotationally connected to the power output end of the servo motor 3011. The two forward and reverse screws 3013 are symmetrically arranged on both sides of the servo motor 3011, and one end of the forward and reverse screw 3013 is rotationally connected to the support frame 5 through a second fixed seat 3015, and the other end of the forward and reverse screw 3013 is rotationally connected to the power output end of the second reducer 3012 through a coupling 3016, and the aluminum profile support arm 302 is threadedly connected to the forward and reverse screw 3013 through a screw fixing plate 3017, and the servo motor 3011 is electrically connected to the PLC controller.

[0037] Specifically, when the centering mechanism 3 is working, the servo motor 3011 provides the power required for centering the glass. The rotational force provided by the output end of the servo motor 3011 is reduced and converted by the second reducer 3012, and drives the forward and reverse screws 3013 on both sides of the second reducer 3012 to rotate in the same direction. The two aluminum profile arms 302 are connected to the forward and reverse screws 3013 on both sides through the screw fixing plate 3017 threaded set, and complete the synchronous mirror motion in the vertical glass transportation direction under the drive of the forward and reverse screws 3013, realizing the operation of approaching or moving away from the glass at the same time, and finally the clamping jaws 303 complete the centering alignment operation of the glass on the main conveyor line 1 to ensure the centering transportation of the glass on the main conveyor line.

[0038] Specifically, the clamping jaw 303 includes a clamping jaw fixing plate 3031 and a polymer plate 3032. The bottom of the clamping jaw fixing plate 3031 is connected to the top of the aluminum profile support arm 302, and the polymer plate 3032 is connected to the top of the clamping jaw fixing plate 3031. Specifically, when the glass is centered and aligned, the polymer plate 3032 is in contact with the glass. The user can set a sponge, a rubber pad or other flexible materials on the contact surface of the polymer plate 3032 and the glass according to actual conditions to prevent damage to the glass.

[0039] Specifically, Figure 7 As shown, the centering guide mechanism 4 includes a guide shaft 401, a linear bearing 402 and a first connecting plate 403. The guide shaft 401 is fixedly connected to the bottom of the support frame 5 through a first fixed seat 404. The linear bearing 402 is slidably connected to the guide shaft 401. The first connecting plate 403 is fixedly connected to the linear bearing 402. The centering mechanism 3 is slidably connected to the support frame 5 through the first connecting plate 403.

[0040] Specifically, Figure 8-9 As shown, the limiting mechanism 2 includes a limiting block 201, a rotating rod 202, a third fixed seat 203 and a driving assembly 204, both ends of the rotating rod 202 are rotatably connected to the support frame 5 through the third fixed seat 203, and a plurality of limiting blocks 201 for positioning and intercepting glass are evenly distributed on the rotating rod 202. The fixed end of the driving assembly 204 is installed at the bottom of the middle rod of the support frame 5. The output end of the driving assembly 204 is transmission-connected with the rotating rod 202 and drives the limiting block 201 on the rotating rod 202 to flip and limit, and the driving assembly 204 is electrically connected to the PLC controller.

[0041] Specifically, the driving assembly 204 includes a stepper motor 2041, a third transmission motor fixing plate 2042, a first transmission pulley 2043, a second transmission pulley 2044 and a transmission belt 2045. The stepper motor 2041 is installed at the bottom of the middle rod of the support frame 5 through the third transmission motor fixing plate 2042. The first transmission pulley 2043 is transmission-connected to the power output end of the stepper motor 2041. The second transmission pulley 2044 is fixedly sleeved and connected to the rotating rod 202. The first transmission pulley 2043 and the second transmission pulley 2044 are transmission-connected through the transmission belt 2045. The stepper motor 2041 is electrically connected to the PLC controller.

[0042] Specifically, the setting of the limit mechanism 2 plays the role of stopping the glass at a fixed point on the main machine conveyor line 1. When the glass is transported to the fixed position, the stepper motor 2041 starts to work, and drives the rotating rod 202 and the multiple limit blocks 201 set on the rotating rod 202 through the transmission belt 2045 to complete a 180-degree rotation until the glass contacts the limit blocks 201, completing the glass stopping operation; specifically, when the glass arrives at the specified position, in order to enable the stepper motor 2041 to achieve autonomous movement, the user can install infrared positioning devices on both sides of the support frame 5 according to actual conditions, so as to detect whether the glass is transported to the specified position, and send a signal to the PLC controller after the glass arrives at the specified position, and control the stepper motor 2041 to act; specifically, the user can set sponges, rubber pads or other flexible materials on the contact surface side of the limit blocks 201 and the glass according to actual conditions to avoid damage to the glass.

[0043] The use process of the utility model is as follows:

[0044] First, when the glass is transported to the designated position of the main machine conveyor line 1, the PLC controller controls the stepper motor 2041 to operate, and drives the rotating rod 202 and the limit block 201 to rotate 180 degrees in the clockwise or counterclockwise direction until the glass contacts the limit block 201, completing the positioning and stopping operation of the glass on the main machine conveyor line 1;

[0045] Then, the servo motor 3011 transmits the rotational power to the second reducer 3012, and the second reducer 3012 drives the forward and reverse lead screws 3013 arranged on both sides to rotate together in the same direction, so that the aluminum profile support arms 302 respectively installed on the two forward and reverse lead screws 3013 can achieve the operation of approaching the glass at the same time, and finally the polymer plate 3032 arranged on the clamping jaws 303 completes the alignment operation of the glass on the main machine conveyor line 1;

[0046] Finally, when the glass completes the centering alignment operation, the servo motor 3011 controls the two aluminum profile arms 302 to move away from the glass at the same time. At the same time, the stepper motor 2041 drives the rotating rod 202 and the limit block 201 to rotate 180 degrees in the opposite direction. The glass that has completed the centering alignment operation will continue to move to the next process driven by the main machine conveyor line 1.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A glass intelligent centering conveyor, characterized in that: The invention comprises a main machine conveying line (1), a limiting mechanism (2), a centering mechanism (3), a centering guide mechanism (4) and a support frame (5); the main machine conveying line (1) is installed above the support frame (5); the centering mechanism (3) is installed at the bottom of the support frame (5); and the working end of the centering mechanism (3) extends upward to the top of the support frame (5); the output end of the main machine conveying line (1) is provided with the limiting mechanism (2); and the main machine conveying line (1), the limiting mechanism (2) and the centering mechanism (3) are all electrically connected to a PLC controller.

2. The glass intelligent centering conveyor according to claim 1 is characterized in that: The main machine conveyor line (1) comprises a transmission shaft (102), a synchronous belt (103) and a transmission motor (104); a plurality of the transmission shafts (102) are arranged in parallel and are rotatably connected to the top of the support frame (5) via a bearing seat (101); and every two adjacent transmission shafts (102) are transmission-connected via the synchronous belt (103); the transmission motor (104) is mounted on one side of the support frame (5) via a first transmission motor fixing plate (106); the transmission motor (104) is transmission-connected to a first reducer (105); a transmission shaft (102) adjacent to the first reducer (105) is transmission-connected to a power output end of the first reducer (105) via the synchronous belt (103); and the transmission motor (104) is electrically connected to the PLC controller.

3. The glass intelligent centering conveyor according to claim 2 is characterized in that: The transmission shaft (102) comprises a transmission shaft body (1021), a multi-directional wheel (1022) and a synchronous pulley (1023); a plurality of the transmission shaft bodies (1021) are rotatably connected to the bearing seat (101); the synchronous pulley (1023) is arranged at one end of the transmission shaft body (1021) and is used for being rotatably connected to the synchronous belt (103); and a plurality of the multi-directional wheels (1022) for conveying glass are evenly distributed on the transmission shaft body (1021).

4. The glass intelligent centering conveyor according to claim 3 is characterized in that: The centering mechanism (3) comprises a linear module (301), an aluminum profile support arm (302) and a clamp (303); the fixed end of the linear module (301) is connected to the bottom of the middle rod of the support frame (5); the ends of the power output shafts arranged on both sides of the linear module (301) are rotatably connected to the two sides of the support frame (5); the aluminum profile support arm (302) is threadedly connected to the power output shaft of the linear module (301); the clamp (303) is fixedly connected to the top of the aluminum profile support arm (302); and the linear module (301) is electrically connected to the PLC controller.

5. The glass intelligent centering conveyor according to claim 4 is characterized in that: The linear module (301) comprises a servo motor (3011), a second reducer (3012), a forward and reverse lead screw (3013), a second transmission motor fixing plate (3014), a second fixing seat (3015), a coupling (3016) and a lead screw fixing plate (3017); the servo motor (3011) and the second reducer (3012) are both mounted on the bottom of the middle rod of the support frame (5) via the second transmission motor fixing plate (3014); the power input end of the second reducer (3012) is rotationally connected to the power output end of the servo motor (3011); The two forward and reverse lead screws (3013) are symmetrically arranged on both sides of the servo motor (3011), and one end of the forward and reverse lead screws (3013) is rotationally connected to the support frame (5) through a second fixed seat (3015), and the other end of the forward and reverse lead screws (3013) is rotationally connected to the power output end of the second reducer (3012) through a coupling (3016), the aluminum profile support arm (302) is threadedly connected to the forward and reverse lead screws (3013) through a lead screw fixing plate (3017), and the servo motor (3011) is electrically connected to the PLC controller.

6. The glass intelligent centering conveyor according to claim 5 is characterized in that: The clamp (303) comprises a clamp fixing plate (3031) and a polymer plate (3032), the bottom of the clamp fixing plate (3031) is connected to the top of the aluminum profile support arm (302), and the polymer plate (3032) is connected to the top of the clamp fixing plate (3031).

7. The glass intelligent centering conveyor according to claim 3 is characterized in that: The centering guide mechanism (4) comprises a guide shaft (401), a linear bearing (402) and a first connecting plate (403); the guide shaft (401) is fixedly connected to the bottom of the support frame (5) via a first fixing seat (404); the linear bearing (402) is slidably connected to the guide shaft (401); the first connecting plate (403) is fixedly connected to the linear bearing (402); and the centering mechanism (3) is slidably connected to the support frame (5) via the first connecting plate (403).

8. The glass intelligent centering conveyor according to claim 3 is characterized in that: The limiting mechanism (2) comprises a limiting block (201), a rotating rod (202), a third fixed seat (203) and a driving assembly (204); both ends of the rotating rod (202) are rotatably connected to the support frame (5) via the third fixed seat (203); a plurality of limiting blocks (201) for positioning and intercepting glass are evenly distributed on the rotating rod (202); a fixed end of the driving assembly (204) is mounted on the bottom of the middle rod of the support frame (5); an output end of the driving assembly (204) is transmission-connected to the rotating rod (202) and drives the limiting block (201) on the rotating rod (202) to flip and limit; and the driving assembly (204) is electrically connected to the PLC controller.

9. The glass intelligent centering conveyor according to claim 8, characterized in that: The driving assembly (204) comprises a stepper motor (2041), a third transmission motor fixing plate (2042), a first transmission pulley (2043), a second transmission pulley (2044) and a transmission belt (2045); the stepper motor (2041) is mounted on the bottom of the middle rod of the support frame (5) via the third transmission motor fixing plate (2042); the first transmission pulley (2043) is transmission-connected to the power output end of the stepper motor (2041); the second transmission pulley (2044) is fixedly sleeved and connected to the rotating rod (202); the first transmission pulley (2043) and the second transmission pulley (2044) are transmission-connected via the transmission belt (2045); and the stepper motor (2041) is electrically connected to the PLC controller.

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