Drafting device for slub yarn

Abstract

The utility model discloses a kind of drafting devices of bamboo joint yarn, including base, the left and right two walls of the base are rotationally connected with the roller of longitudinal uniform distribution by pivot, further including cleaning mechanism;Cleaning mechanism: it includes guide rod one, translation shell, nylon silk annular brush seat and suction assembly, the guide rod one is slidably connected in the round hole one opened in the right wall of base, translation shell is equipped between the left end of guide rod one, the left and right two walls of translation shell are rotationally connected with the nylon silk annular brush seat of longitudinal uniform distribution by sealing bearing, nylon silk annular brush seat is cooperatively installed with the roller adjacent to transverse, suction assembly is equipped between translation shell and base, the drafting device of this bamboo joint yarn, by transmission element, accumulated cotton wax, short nap, flying flower and other impurities on the surface of roller can be cleaned and collected automatically, reduce the bamboo joint yarn of bamboo joint yarn flaw degree, roller surface cleaning automation, without staff intervention.

Description

Technical Field

[0001] This utility model relates to the field of spinning technology, specifically to a drafting device for slub yarn. Background Technology

[0002] Slub yarn refers to yarn with thick or thin sections along its length that differ from the thickness of regular plain yarn. These overlapping sections resemble the knots of bamboo, hence the name slub yarn. The slub effect is achieved through a drafting device within the spinning machine. Some slub yarn drafting devices have three sets of rollers within the frame: front, middle, and rear. Each set of rollers is controlled by a corresponding motor. During slub yarn production, control elements, combined with a motor controller, ensure a constant speed for the front roller while increasing the speed of the middle and rear rollers to achieve overfeeding, creating thicker sections that differ from the base yarn, thus achieving the slub effect. During use, the rollers rub against the fibers. Over time, impurities such as cotton wax, short fibers, and fly waste accumulate on the roller surface, increasing friction and leading to more hooked fibers, which easily form slub yarn defects requiring manual cleaning. Therefore, we propose a drafting device for slub yarn. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a drafting device for slub yarn. This device can automatically clean and collect impurities such as cotton wax, short fibers, and fly waste accumulated on the roller surface through transmission elements, thereby reducing the slub yarn defect rate. The roller surface cleaning is automated and does not require manual intervention, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a drafting device for slub yarn, including a base, wherein the left and right walls of the base are rotatably connected to longitudinally uniformly distributed rollers via a rotating shaft, and also includes a cleaning mechanism; Cleaning mechanism: It includes a guide rod, a translation shell, a nylon filament ring brush seat, and an adsorption assembly. The guide rod is slidably connected to a circular hole on the right wall of the base. A translation shell is provided between the left ends of the guide rod. The left and right walls of the translation shell are rotatably connected by a sealed bearing to a longitudinally evenly distributed nylon filament ring brush seat. The nylon filament ring brush seat is installed in conjunction with the adjacent rollers laterally. An adsorption assembly is provided between the translation shell and the base. This device can automatically clean and collect impurities such as cotton wax, short fibers, and fly waste accumulated on the roller surface through a transmission element, reducing the slub yarn defect of slub yarn. The roller surface cleaning is automated and does not require manual intervention.

[0005] Furthermore, it also includes a microcontroller, which is located outside the base and its input terminal is electrically connected to an external power supply, facilitating the control of electrical components within the device.

[0006] Furthermore, it also includes a motor controller, which is located outside the base. The left side of the base is equipped with evenly distributed servo motors. The input ends of the servo motors are all electrically connected to the output end of the microcontroller through the motor controller. The output shafts of the servo motors are all fixedly connected to the left end of the adjacent rotating shafts to regulate the rotation speed of the rollers in the drafting device of the slub yarn.

[0007] Furthermore, the cleaning mechanism also includes a worm gear, a worm, and a low-speed motor. The worm gear is respectively located on the outer middle of the nylon filament ring brush holder. The worm is rotatably connected inside the translational housing through bearing two. The worm gear is meshed with the worm. A low-speed motor is provided on the front side of the translational housing. The input end of the low-speed motor is electrically connected to the output end of the microcontroller. The output shaft of the low-speed motor is fixedly connected to the front end of the worm, so that the nylon filament ring brush holder in the slub yarn drafting device can rotate synchronously.

[0008] Furthermore, the cleaning mechanism also includes a laser sensor and an electro-hydraulic actuator. The laser sensor is located on the left side of the translation shell and is bidirectionally electrically connected to the microcontroller. An electro-hydraulic actuator is located on the right side of the base. The input end of the electro-hydraulic actuator is electrically connected to the output end of the microcontroller, and the telescopic end of the electro-hydraulic actuator is fixedly connected to the right side of the translation shell, thereby controlling the horizontal left and right movement position of the translation shell within the drafting device for slub yarn.

[0009] Furthermore, the adsorption assembly includes an annular adsorption shell, a first pipe, a corrugated pipe, and a second pipe. The annular adsorption shells are evenly arranged on the left side of the translation shell. The annular adsorption shells are axially aligned with the adjacent nylon filament annular brush seats. The inner wall of the annular adsorption shell is provided with the first pipe, and the right wall of the base is provided with the evenly distributed second pipe. Corrugated pipes are provided between the second pipe and the vertically adjacent first pipe. By cooperating with an external industrial vacuum cleaner, impurities such as cotton wax, short fibers, and fly waste cleaned off the inner roller of the drafting device of the slub yarn are collected.

[0010] Furthermore, a fixed seat is provided on the inclined surface of the base, and an electro-hydraulic actuator two is provided on the upper side of the fixed seat. The input end of the electro-hydraulic actuator two is electrically connected to the output end of the microcontroller. A lifting seat is provided on the telescopic end of the electro-hydraulic actuator two. The interior of the lifting seat is rotatably connected to evenly distributed auxiliary rollers through a bearing three. The auxiliary rollers are all installed in cooperation with adjacent rollers. A laser sensor two and two symmetrically distributed guide rods two are provided on the upper side of the lifting seat. The laser sensor two is bidirectionally electrically connected to the microcontroller. The upper ends of the guide rods two are slidably connected to the circular holes two opened on the fixed seat to adjust the vertical position of the auxiliary rollers in the drafting device of the slub yarn.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This drafting device for slub yarn has the following advantages: When using the drafting device for slub yarn, the device drives the nylon filament ring brush seat to move horizontally back and forth while rotating through worm gear transmission and electric rod drive. This automatically cleans the cotton wax, short fibers, fly waste and other impurities accumulated on the roller surface. At the same time, the cleaned cotton wax, short fibers, fly waste and other impurities are collected by the adsorption component and external industrial vacuum cleaner, reducing the slub yarn defect. The roller surface cleaning is automated and does not require human intervention. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the translation shell of this utility model; Figure 3 This is an enlarged structural diagram of point A in this utility model.

[0013] In the diagram: 1. Base, 2. Microcontroller, 3. Rotating shaft, 4. Roller, 5. Servo motor, 6. Motor controller, 7. Cleaning mechanism, 71. Guide rod one, 72. Translation shell, 73. Nylon filament ring brush holder, 74. Worm gear, 75. Worm, 76. Low-speed motor, 77. Laser sensor one, 78. Electro-hydraulic actuator one, 79. Adsorption assembly, 791. Ring adsorption shell, 792. Pipe one, 793. Corrugated pipe, 794. Pipe two, 8. Fixed seat, 9. Guide rod two, 10. Lifting seat, 11. Auxiliary roller, 12. Electro-hydraulic actuator two, 13. Laser sensor two. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3This embodiment provides a technical solution: a drafting device for slub yarn, including a base 1, with longitudinally evenly distributed rollers 4 rotatably connected to the left and right walls of the base 1 via a rotating shaft 3; a microcontroller 2 located outside the base 1, with its input terminal electrically connected to an external power supply; and a motor controller 6 located outside the base 1. Evenly distributed servo motors 5 are located on the left side of the base 1, with their input terminals electrically connected to the output terminals of the microcontroller 2 via the motor controller 6. The output shafts of the servo motors 5 are fixedly connected to the left ends of adjacent rotating shafts 3. A fixed seat 8 is provided on the inclined surface of the base 1, and an electro-hydraulic actuator 12 is provided on the upper side of the fixed seat 8. The input terminal of the electro-hydraulic actuator 12 is connected to the input terminal of the microcontroller 2. The output end is electrically connected. The telescopic end of the electro-hydraulic actuator 12 is equipped with a lifting seat 10. Inside the lifting seat 10, evenly distributed auxiliary rollers 11 are rotatably connected via bearings 3. Each auxiliary roller 11 is installed in conjunction with an adjacent roller 4. A laser sensor 13 and two symmetrically distributed guide rods 9 are provided on the upper side of the lifting seat 10. The laser sensor 13 is bidirectionally electrically connected to the microcontroller 2. The upper ends of the guide rods 9 are slidably connected to the circular holes 2 opened on the fixed seat 8. When using the device to draft the slub yarn, the positional relationship data between the components in the device is first entered into the microcontroller 2. Then, the device is installed on the corresponding position on the textile machine with bolts. At the same time, the pipe 794 is connected to the suction port of an external industrial vacuum cleaner. The drafting device inside the textile machine is then used to draft the yarn. The fiber is positioned so that it passes sequentially through the vertical gap between roller 4 and the adjacent auxiliary roller 11 from the lower right to the upper left. Then, the microcontroller 2, via the motor controller 6, starts the servo motor 5, causing its output shaft to drive roller 4 through the rotating shaft 3 (the motor controller 6 converts the input electrical energy into controllable three-phase AC power through power electronic conversion and closed-loop control algorithms, achieving precise control of the speed, torque, and direction of the servo motor 5). During the rotation of roller 4, it comes into frictional contact with the fiber. During this process, the microcontroller 2, via the motor controller 6, adjusts the speed of each of the three servo motors 5, creating a speed difference between the upper roller 4 and the middle and lower rollers 4. By adjusting the speed difference of roller 4, the draft ratio of the roller 4 on the fiber is changed, forming a slub effect, thus achieving slub yarn. During the wire stretching operation, when the device is cleaning at one end, the microcontroller 2 activates the electro-hydraulic actuator 12, causing its telescopic end to move the lifting seat 10 and its connecting parts vertically upwards synchronously. During this process, the microcontroller 2 activates the laser sensor 13, which emits a light signal that illuminates the top wall of the fixed seat 8 and reflects back to its initial position. Based on the light signal propagation time and speed, the upward movement distance of the lifting seat 10 is obtained, and the detection result is transmitted to the lifting seat 10 as an electrical signal. The lifting seat 10, based on the detection result and the positional relationship data between the components within the device, adjusts the retraction position of the telescopic end of the electro-hydraulic actuator 12, allowing the lifting seat 10 to avoid the subsequent horizontal movement of the translational housing 72 by moving upwards.During the vertical movement of the lifting seat 10, the guide rod 9 slides adaptively along the corresponding circular hole 2. Through the sliding engagement between the two, the lifting seat 10 bears the radial pressure applied to the telescopic end of the electro-hydraulic actuator 12, preventing damage to the telescopic end of the electro-hydraulic actuator 12 due to radial pressure. The system also includes a cleaning mechanism 7. Cleaning mechanism 7 includes guide rod 71, translation shell 72, nylon filament annular brush holder 73, and adsorption assembly 79. Guide rod 71 is slidably connected to a circular hole 1 on the right wall of base 1. Translation shell 72 is located between the left ends of guide rod 71. Nylon filament annular brush holders 73 are rotatably connected longitudinally and evenly distributed between the left and right walls of translation shell 72 via sealed bearings. Nylon filament annular brush holders 73 are all fitted with adjacent rollers 4 laterally. Adsorption assembly 79 is located between translation shell 72 and base 1. Cleaning mechanism 7 also includes worm gear 74, worm 75, and low-speed motor 76. Worm gear 74 is located on the outer middle of the nylon filament annular brush holder 73. Worm 75 is rotatably connected inside translation shell 72 via bearing 2. The worm gear 74 is rotatably connected with the rollers 4 laterally. The worm gear 75 is engaged with the worm. A low-speed motor 76 is located on the front side of the translation housing 72. The input end of the low-speed motor 76 is electrically connected to the output end of the microcontroller 2. The output shaft of the low-speed motor 76 is fixedly connected to the front end of the worm gear 75. The cleaning mechanism 7 also includes a laser sensor 77 and an electro-hydraulic actuator 78. The laser sensor 77 is located on the left side of the translation housing 72 and is electrically connected to the microcontroller 2 bidirectionally. An electro-hydraulic actuator 78 is located on the right side of the base 1. The input end of the electro-hydraulic actuator 78 is electrically connected to the output end of the microcontroller 2. The telescopic end of the electro-hydraulic actuator 78 is fixedly connected to the right side of the translation housing 72. The adsorption assembly 79 includes an annular adsorption housing 791, a first pipe 792, a corrugated pipe 793, and a second pipe 794. The annular adsorption housing 791 is divided into... The annular adsorption shells 791 are evenly distributed on the left side of the translation shell 72, and are axially aligned with the adjacent nylon filament annular brush seats 73. The inner walls of the annular adsorption shells 791 are all permeated with pipes 792. The right wall of the base 1 is permeated with evenly distributed pipes 794. Corrugated pipes 793 are provided between pipes 794 and the vertically adjacent pipes 792. When the device is in use for cleaning, the microcontroller 2 activates the electro-hydraulic actuator 78, causing its extension and retraction to drive the translation shell 72 to move horizontally back and forth. During the horizontal movement of the translation shell 72, the nylon filament annular brush seats 73 move laterally, thus allowing the nylon filament annular brush seats 73 to come into contact with the outer side of the corresponding roller 4 during the horizontal movement, thereby removing the accumulated debris on the roller 4. The system cleans away impurities such as cotton wax, lint, and fly ash. Simultaneously, the microcontroller 2 activates a low-speed motor 76, whose output shaft drives the worm gear 75 to rotate. During this rotation, the worm gear 75 engages with the worm wheel 74, causing the corresponding nylon annular brush holder 73 to rotate synchronously. The nylon annular brush holder 73 rotates around its own axis and presses against the outer side of the roller 4, further improving the cleaning effect on the accumulated cotton wax, lint, and fly ash on the roller 4. Simultaneously, an external industrial vacuum cleaner operates, using pipe two 794, corrugated pipe 793, and pipe one 792 to generate pneumatic suction force in the annular suction shell 791, thus promptly collecting any impurities that fall off the roller 4. This system is convenient to use.Simultaneously, during this process, the microcontroller 2 activates the laser sensor 77. The laser sensor 77 emits a light signal that illuminates the left wall of the base 1 and reflects back to the initial position. Using the same principle, the translation distance of the translation shell 72 is measured, and the measurement result is transmitted to the microcontroller 2 as an electrical signal. Based on this result and the positional relationship data between the components within the device, the microcontroller 2 adjusts the extension and retraction stroke of the telescopic end of the electro-hydraulic actuator 78. This prevents the translation shell 72 from colliding with the base 1 during its horizontal reciprocating movement. During horizontal movement, the guide rod 71 slides adaptively along the corresponding circular hole. Based on the same principle, the sliding engagement between the two supports the radial pressure applied by the translation shell 72 to the telescopic end of the electro-hydraulic actuator 78, preventing damage to the telescopic end of the electro-hydraulic actuator 78 due to radial pressure. This device, through its transmission elements, automatically cleans and collects accumulated impurities such as cotton wax, short fibers, and fly waste on the surface of roller 4, reducing the slub yarn defect rate. The surface cleaning of roller 4 is automated and requires no operator intervention.

[0016] The working principle of the drafting device for slub yarn provided by this utility model is as follows: When using the device to draft slub yarn, firstly, the positional relationship data between the components in the device is entered into the microcontroller 2. Then, the device is installed on the corresponding position on the textile machine with bolts. At the same time, pipe 2 794 is connected to the air intake of an external industrial vacuum cleaner. Through the traction device in the textile machine, the fiber passes through the vertical gap between the roller 4 and the adjacent auxiliary roller 11 from the lower right to the upper left. Then, the microcontroller 2 starts the servo motor 5 through the motor controller 6, so that its output shaft drives the roller 4 to rotate through the rotating shaft 3. (The motor controller 6 converts the input electrical energy into controllable three-phase AC power through power electronic conversion and closed-loop control algorithm, realizing the control of the speed, torque and direction of the servo motor 5.) (Precise control) During the rotation of roller 4, it comes into frictional contact with the fiber. During this process, the microcontroller 2 regulates the speed of each of the three servo motors 5 through the motor controller 6, so that there is a speed difference between the upper roller 4 and the middle and lower rollers 4. By adjusting the speed difference of roller 4, the drafting ratio of roller 4 on the fiber is changed, forming a bamboo effect, thereby realizing the drafting operation of bamboo yarn. When the device is used for cleaning, the microcontroller 2 activates the electro-hydraulic push rod 12, so that its extension end drives the lifting seat 10 and the connecting parts of the lifting seat 10 to move vertically upward synchronously. During this process, the microcontroller 2 activates the laser sensor 13. The laser sensor 13 emits a light signal to illuminate the top wall of the fixed seat 8 and reflects it back to the initial position. According to the propagation time and speed of the light signal, The upward movement distance of the lifting seat 10 is obtained, and the detection result is transmitted to the lifting seat 10 as an electrical signal. Based on the detection result and the positional relationship data between the components within the device, the lifting seat 10 adjusts the retraction position of the telescopic end of the electro-hydraulic actuator 12. This allows the lifting seat 10 to avoid the horizontal movement of the subsequent translation shell 72 by moving upward. During the vertical movement of the lifting seat 10, the guide rod 9 adaptively slides along the corresponding circular hole 2. Through the sliding engagement between the two, the radial pressure applied by the lifting seat 10 to the telescopic end of the electro-hydraulic actuator 12 is borne, preventing damage to the telescopic end of the electro-hydraulic actuator 12 due to radial pressure. Subsequently, the microcontroller 2 activates the electro-hydraulic actuator 78, causing its telescopic end to extend and retract, driving the translation shell 72... The sliding shell 72 moves horizontally back and forth. During this horizontal movement, it drives the nylon annular brush holder 73 to move laterally. This allows the nylon annular brush holder 73 to make contact with the outer side of the corresponding roller 4, thus cleaning the accumulated impurities such as cotton wax, short lint, and fly ash on the roller 4. Simultaneously, the microcontroller 2 starts the low-speed motor 76, whose output shaft drives the worm gear 75 to rotate. During the rotation of the worm gear 75, the worm wheel 74 drives the corresponding nylon annular brush holder 73 to rotate synchronously through meshing connection. By rotating around its own axis and making contact with the outer side of the roller 4, the nylon annular brush holder 73 further improves the cleaning effect of the nylon annular brush holder 73 on the roller 4, removing the accumulated impurities such as cotton wax, short lint, and fly ash.Simultaneously, during this process, an external industrial vacuum cleaner operates, generating pneumatic suction force on the annular adsorption shell 791 through pipe 2 794, corrugated pipe 793, and pipe 1 792. This allows for the timely collection of impurities dropped from the roller 4, making it convenient to use. At the same time, the microcontroller 2 activates laser sensor 1 77, which emits a light signal that illuminates the left wall of the base 1 and reflects back to its initial position. Using the same principle, the translation distance of the translation shell 72 is measured, and the measurement result is transmitted to the microcontroller 2 as an electrical signal. The microcontroller 2 then... By collecting the positional relationship data between the components within the device, the extension and retraction stroke of the telescopic end of the electro-hydraulic actuator 78 is controlled. This prevents the translation housing 72 from colliding with the base 1 during its horizontal reciprocating movement. During the horizontal movement of the translation housing 72, the guide rod 71 slides adaptively along the corresponding circular hole. Based on the same principle, the sliding engagement between the two supports the radial pressure applied by the translation housing 72 to the telescopic end of the electro-hydraulic actuator 78, preventing damage to the telescopic end of the electro-hydraulic actuator 78 due to radial pressure.

[0017] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be an MSP430, the servo motor 5 can be an MHMF042L1U2, the motor controller 6 can be an SDJ series motor controller, the low-speed motor 76 can be a GA25-370 micro DC geared motor, the laser sensor 1 77 and the laser sensor 2 13 can be E3C-LDA6, and the electro-hydraulic actuator 1 78 and the electro-hydraulic actuator 2 12 can be DYZW integral straight micro electro-hydraulic actuators. The microcontroller 2 controls the operation of the servo motor 5, the motor controller 6, the low-speed motor 76, the laser sensor 1 77, the electro-hydraulic actuator 1 78, the electro-hydraulic actuator 2 12, and the laser sensor 2 13 using methods commonly used in the prior art.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A drafting device for slub yarn, comprising a base (1), wherein the left and right walls of the base (1) are rotatably connected by longitudinally uniformly distributed rollers (4) via a rotating shaft (3), characterized in that: It also includes cleaning agencies (7); Cleaning mechanism (7): It includes a guide rod (71), a translation shell (72), a nylon filament ring brush seat (73) and an adsorption component (79). The guide rod (71) is slidably connected to a circular hole on the right wall of the base (1). The translation shell (72) is provided between the left ends of the guide rod (71). The left and right walls of the translation shell (72) are rotatably connected by a sealed bearing to a longitudinally evenly distributed nylon filament ring brush seat (73). The nylon filament ring brush seat (73) is installed in conjunction with the adjacent roller (4) laterally. An adsorption component (79) is provided between the translation shell (72) and the base (1).

2. The drafting device for slub yarn according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the base (1), and the input terminal of the microcontroller (2) is electrically connected to an external power supply.

3. The drafting device for slub yarn according to claim 2, characterized in that: It also includes a motor controller (6), which is located outside the base (1). The base (1) has evenly distributed servo motors (5) on the left side. The input ends of the servo motors (5) are electrically connected to the output ends of the microcontroller (2) through the motor controller (6). The output shafts of the servo motors (5) are fixedly connected to the left end of the adjacent rotating shaft (3).

4. The drafting device for slub yarn according to claim 2, characterized in that: The cleaning mechanism (7) also includes a worm gear (74), a worm (75) and a low-speed motor (76). The worm gear (74) is respectively located on the outer middle of the nylon filament ring brush holder (73). The worm (75) is rotatably connected to the inside of the translation shell (72) through a bearing. The worm gear (74) is meshed with the worm (75). The front side of the translation shell (72) is provided with a low-speed motor (76). The input end of the low-speed motor (76) is electrically connected to the output end of the microcontroller (2). The output shaft of the low-speed motor (76) is fixedly connected to the front end of the worm (75).

5. The drafting device for slub yarn according to claim 2, characterized in that: The cleaning mechanism (7) also includes a laser sensor (77) and an electro-hydraulic actuator (78). The laser sensor (77) is located on the left side of the translation shell (72). The laser sensor (77) is bidirectionally electrically connected to the microcontroller (2). The electro-hydraulic actuator (78) is located on the right side of the base (1). The input end of the electro-hydraulic actuator (78) is electrically connected to the output end of the microcontroller (2). The telescopic end of the electro-hydraulic actuator (78) is fixedly connected to the right side of the translation shell (72).

6. The drafting device for slub yarn according to claim 1, characterized in that: The adsorption assembly (79) includes an annular adsorption shell (791), a first pipe (792), a corrugated pipe (793), and a second pipe (794). The annular adsorption shells (791) are evenly arranged on the left side of the translation shell (72). The annular adsorption shells (791) are axially aligned with the adjacent nylon annular brush seat (73). The inner wall of the annular adsorption shells (791) is provided with the first pipe (792). The right wall of the base (1) is provided with the second pipe (794) which is evenly distributed. The second pipe (794) is provided with a corrugated pipe (793) between the second pipe (794) and the vertically adjacent first pipe (792).

7. The drafting device for slub yarn according to claim 2, characterized in that: The base (1) has a fixed seat (8) on its inclined surface. The upper side of the fixed seat (8) has an electro-hydraulic push rod (12). The input end of the electro-hydraulic push rod (12) is electrically connected to the output end of the microcontroller (2). The telescopic end of the electro-hydraulic push rod (12) has a lifting seat (10). The interior of the lifting seat (10) is rotatably connected to an evenly distributed auxiliary roller (11) through a bearing (3). The auxiliary roller (11) is installed in cooperation with the adjacent roller (4). The upper side of the lifting seat (10) has a laser sensor (13) and two symmetrically distributed guide rods (9). The laser sensor (13) is electrically connected to the microcontroller (2) in both directions. The upper ends of the guide rods (9) are slidably connected to the circular holes (2) on the fixed seat (8).

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