Rice huller roller adjusting assembly, roller adjusting method and rice huller

Abstract

The invention discloses a rice huller roller adjusting assembly, a roller adjusting method and a rice huller, the roller adjusting assembly comprises a pin shaft, a stepping motor, a lead screw, a guide rod, a contact switch and an air cylinder, the pin shaft is arranged on a movable support, the stepping motor is connected with the lead screw, the lead screw is provided with a lead screw nut, and the lead screw nut is connected with the guide rod. The lead screw and the guide rod penetrate through the pin shaft and can horizontally move along the pin shaft, one end of the guide rod is connected with the lead screw nut, the contact switch is arranged on the movable support, a stopping plate is arranged on the side, close to the contact switch, of the lead screw nut, and the contact switch makes contact with the stopping plate along with movement of the movable support. The air cylinder is connected with the movable support. The gap between the fixed roller and the movable roller is statically and accurately adjusted, the rice hulling effect is improved, the service life of the fixed roller and the movable roller is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of rice hulling equipment, and particularly relates to a roller adjustment assembly for a rice huller, a roller adjustment method, and a rice huller. Background Art

[0002] In the rice hulling operation, the gap adjustment of the rubber rollers of the rice huller plays a crucial role in the rice hulling effect. There are many deficiencies in the existing rubber roller adjustment methods of rice hullers. Most pneumatic rice hullers use the direct friction method between the moving rubber roller and the stationary rubber roller. In this way, the rubber rollers wear quickly, have a short service life, and frequently replacing the rubber rollers increases the production cost and the maintenance workload. At the same time, it is difficult to accurately control the gap between the rubber rollers with the traditional adjustment method, resulting in unstable rice hulling effect, affecting the production efficiency and product quality. Therefore, there is an urgent need for a device and method that can automatically and accurately adjust the gap between the rubber rollers of the rice huller to improve the durability of the rubber rollers and the rice hulling effect.

[0003] During the working process of the rice huller, belt drive is a common power transmission method. However, when the traditional belt drive system of the rice huller is running, due to the long-term use of the belt, it will become loose, resulting in reduced transmission efficiency and even problems such as slipping, affecting the normal operation of the rice huller. At the same time, the existing rice hullers will also adjust the gap between the moving roller and the fixed roller according to the rice hulling situation; after adjustment, it is also necessary to retighten the belt. The existing tensioning methods are mostly manual tensioning, which requires operators to regularly check and manually adjust the tensioning degree. The operation is cumbersome, and it is difficult to ensure that the belt is always in the best tensioning state under different working conditions, unable to meet the requirements of the efficient and stable operation of the rice huller. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned existing technologies, and provide a rice huller that can improve the rice hulling effect, extend the service life of the fixed roller and the moving roller, and reduce the production cost by statically and accurately adjusting the gap between the fixed roller and the moving roller; the tensioning mechanism solves the problems of inconvenient tensioning and difficulty in automatically maintaining the best tensioning state in the belt drive system of the existing rice huller.

[0005] The technical solution adopted by the present invention is as follows: A rice huller, which at least includes a rice hulling body and a rice hulling control component. The inside of the rice hulling body is divided into two independent cavities, namely a rice hulling cavity and an adjustment cavity. In the adjustment cavity, a fixed roller and a moving roller that extend into the rice hulling cavity and are arranged vertically are respectively connected through a fixed bracket and a moving bracket. The moving bracket moves relative to the inner side of the adjustment cavity. The roller adjustment component includes a pin shaft, a stepping motor, a lead screw, a guide rod, a contact switch, and a cylinder. The pin shaft is arranged on the moving bracket. The stepping motor is connected to the lead screw. A lead screw nut is arranged on the lead screw. Both the lead screw and the guide rod pass through the pin shaft and can move horizontally along the pin shaft. One end of the guide rod is connected to the lead screw nut. The contact switch is arranged on the moving bracket. A stop plate is arranged on the side of the lead screw nut close to the contact switch. The contact switch contacts the stop plate as the moving bracket moves. The cylinder is connected to the moving bracket. The cylinder, the stepping motor, and the contact switch are all electrically connected to the rice hulling control component.

[0006] The present invention also discloses a method for adjusting the rollers of a rice huller, which is realized through the roller adjustment component and includes the following steps:

[0007] Step 1: Electrically connect the cylinder, the stepping motor, and the contact switch to the rice hulling control component, make the contact switch contact the stop plate, and when the contact switch is in the on state, proceed to Step 2;

[0008] Step 2: Start the rice hulling control component, set the gap parameter between the fixed roller and the moving roller, and set the operating air pressure of the cylinder, then proceed to Step 3;

[0009] Step 3: The rice hulling control component controls the stepping motor to rotate, driving the lead screw to rotate, and the lead screw nut generates displacement on the lead screw, then proceed to Step 4;

[0010] Step 4: The rice hulling control component controls the cylinder to operate. The cylinder pulls the moving roller towards the fixed roller. When the moving roller abuts against the fixed roller and reaches the set operating air pressure of the cylinder, the rice hulling control component controls the cylinder to stop working and controls the cylinder to maintain the current pulling force, then proceed to Step 5;

[0011] Step 5: The lead screw continues to rotate driven by the stepping motor, thereby driving the lead screw nut to continue moving towards the fixed roller. When the contact switch separates from the stop plate, the contact switch disconnects, then proceed to Step 6;

[0012] Step 6: The rice hulling control component controls the stepping motor to rotate in the reverse direction, driving the lead screw to rotate, and the lead screw nut generates displacement on the lead screw, thereby driving the moving bracket and the moving roller to move away from the fixed roller. When the lead screw nut contacts the pin shaft and the contact switch contacts the stop plate, the rice hulling control component marks this position as the zero point, then proceed to Step 7;

[0013] Step 7: The stepping motor continues to rotate in the reverse direction. The lead screw nut drives the moving bracket to displace away from the fixed roller. Taking the zero point marked in Step 6 as the reference, when the displacement value reaches the set gap parameter between the fixed roller and the moving roller, the husking control component controls the stepping motor to stop working, and the gap adjustment between the fixed roller and the moving roller is completed.

[0014] In one embodiment, it further includes a manual adjustment step for the fixed roller and the moving roller, which is specifically as follows:

[0015] According to the gap between the fixed roller and the moving roller, the husking control component controls the stepping motor to rotate forward or backward. When the gap between the fixed roller and the moving roller is adjusted to the required husking gap, the husking control component controls the stepping motor to stop working.

[0016] The present invention also discloses a husker, which includes a roller adjustment component, a husking machine body, and a husking control component. The inside of the husking machine body is divided into two independent cavities, namely a husking cavity and an adjustment cavity. The top of the husking cavity is provided with a feed port communicating with its interior. Inside the adjustment cavity, a fixed roller and a moving roller extending into the husking cavity and arranged vertically are respectively connected through a fixed bracket and a moving bracket. The moving bracket moves relative to the inner side of the adjustment cavity. A first tensioning wheel and a tensioning mechanism are further provided inside the adjustment cavity. A conveyor belt is provided on the fixed roller, the moving roller, the first tensioning wheel, and the tensioning mechanism. The tensioning mechanism contacts the conveyor belt and tensions the conveyor belt after the displacement of the moving roller.

[0017] In one embodiment, the tensioning mechanism includes a tensioning mounting bracket fixedly connected to the inside of the adjustment cavity. One side of the tensioning mounting bracket is provided with a rotating arm rotating relative to the tensioning mounting bracket through a rotating shaft. A second tensioning wheel contacting the conveyor belt and tensioning the conveyor belt after the displacement of the moving roller is provided on the rotating arm. A spring force adjustment component is provided between the rotating arm and the tensioning mounting bracket.

[0018] In one embodiment, the spring force adjustment component includes a spring. The two ends of the spring are respectively connected to the tensioning mounting bracket and the rotating arm.

[0019] In one embodiment, first connecting parts are respectively provided at the two ends of the spring. The spring is respectively connected to the tensioning mounting bracket and the rotating arm through the first connecting parts.

[0020] In one embodiment, a first connecting component is provided on the side of the tensioning mounting bracket. The first connecting component includes a first connecting rod. The first connecting part of the spring is connected to the first connecting rod. A limit nut for restricting the movement of the first connecting part of the spring to the outside of the first connecting rod is provided at the end of the first connecting rod away from the tensioning mounting bracket.

[0021] In one embodiment, a second connecting portion is provided on the rotating arm, and the second connecting portion is connected to the first connecting portion of the spring through a second connecting assembly.

[0022] In one embodiment, the second connecting assembly includes a second connecting rod connected to the second connecting portion. A third connecting portion is provided at one end of the second connecting rod away from the second connecting portion, and the third connecting portion is connected to the first connecting portion of the spring.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The present invention realizes the precise automatic adjustment of the gap between the rubber rollers of the rice huller. Compared with the traditional method, it can effectively avoid excessive wear of the fixed roller and the moving roller, extend the service life of the fixed roller and the moving roller, and reduce the frequency and cost of replacing the fixed roller and the moving roller; the precise adjustment of the gap between the fixed roller and the moving roller ensures the stability of the rice hulling effect during the rice hulling process, improves the production efficiency and product quality;

[0025] 2. The device not only has an automatic adjustment function, but also is provided with a manual adjustment method, which increases the flexibility and convenience of operation and can adapt to different production requirements;

[0026] 3. The tensioning mechanism provides a tensioning force through a spring, and can automatically adjust the tensioning degree according to the change of the conveyor belt tension, without the need for frequent manual adjustment by workers, greatly improving the work efficiency;

[0027] 4. The tensioning mechanism has a simple structure, is easy to install, and has high reliability. It can effectively extend the service life of the conveyor belt and reduce the maintenance cost of the equipment; at the same time, the stable tensioning state ensures the efficient and stable operation of the conveyor belt drive system of the rice huller, and improves the overall working performance of the rice huller. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the roller adjustment assembly of the present invention;

[0029] Figure 2 is of the present invention Figure 1 enlarged view at A;

[0030] Figure 3 is an electrical connection block diagram of each component of the present invention;

[0031] Figure 4 is a schematic structural diagram of the rice huller of the present invention;

[0032] Figure 5 is a schematic structural diagram of the tensioning mechanism of the present invention;

[0033] Figure 6 is a left view of the tensioning mechanism of the present invention.

[0034] In the figure: 1, hulling machine body; 2, hulling control component; 3, fixed bracket; 4, movable bracket; 5, fixed roller; 6, movable roller; 7, roller adjustment component; 8, tensioning mechanism; 9, first tensioning wheel; 10, conveyor belt; 11, feed inlet; 101, adjustment cavity; 701, cylinder; 702, stepping motor; 703, lead screw; 704, lead screw nut; 705, contact switch; 706, pin shaft; 707, guide rod; 708, stop plate; 709, connecting plate; 801, tensioning mounting bracket; 802, rotating arm; 803, rotating shaft; 804, second tensioning wheel; 805, elastic force adjustment component; 806, first connection component; 807, reinforcing plate; 808, adjusting handwheel; 8021, second connection part; 8022, second connection component; 80221, second connecting rod; 80222, third connection part; 8051, spring; 80511, first connection part; 8061, first connecting rod; 8062, limit nut. Detailed implementation mode

[0035] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0036] As Figures 1 - 3 shown, the present invention discloses a roller adjustment component of a hulling machine. The hulling machine at least includes a hulling machine body 1 and a hulling control component 2. The inside of the hulling machine body 1 is divided into two independent cavities, namely a hulling cavity and an adjustment cavity 101. Inside the adjustment cavity 101, a fixed roller 5 and a movable roller 6 that extend into the hulling cavity and are arranged up and down are respectively connected through a fixed bracket 3 and a movable bracket 4. The movable bracket 4 moves relative to the inner side of the adjustment cavity 101. The roller adjustment component 7 includes a pin shaft 706, a stepping motor 702, a lead screw 703, a guide rod 707, a contact switch 705 and a cylinder 701. The pin shaft 706 is arranged on the movable bracket 4. The stepping motor 702 is connected to the lead screw 703. A lead screw nut 704 is arranged on the lead screw 703. Both the lead screw 703 and the guide rod 707 pass through the pin shaft 706 and can move horizontally along the pin shaft 706. One end of the guide rod 707 is connected to the lead screw nut 704. The contact switch 705 is arranged on the movable bracket 4. A stop plate 708 is arranged on the lead screw nut 704 on the side close to the contact switch 705. The contact switch 705 contacts the stop plate 708 as the movable bracket 4 moves. The cylinder 701 is connected to the movable bracket 4. The cylinder 701, the stepping motor 702 and the contact switch 705 are all electrically connected to the hulling control component 2.

[0037] The contact switch 705 is arranged on the movable bracket 4 through a connecting plate 709.

[0038] In the roller adjusting assembly, the air cylinder 701 is used to tighten the moving roller 6 towards the fixed roller 5 when the moving roller 6 is in the initial state, and the magnitude of its acting force can be adjusted by air pressure. This acting force is the inter-roller pressure during the husking process. The contact switch 705 is used to feedback signals and control the operation of the stepping motor 702. The lead screw 703 cooperates with the lead screw nut 704 to convert the rotational force of the stepping motor 702 into displacement along the lead screw 703.

[0039] The husking control assembly 2 at least includes a PLC and a human-machine interface. The PLC is used to receive signals from the air cylinder 701, the stepping motor 702, and the contact switch 705, and control the operating states of the air cylinder 701 and the stepping motor 702. The human-machine interface is used to input the gap parameters between the fixed roller 5 and the moving roller 6 and set the operating air pressure of the air cylinder 701; meanwhile, through the human-machine interface, the distance between the fixed roller 5 and the moving roller 6 can also be manually adjusted. The PLC controls the operating air pressure of the air cylinder 701 through a pneumatic control valve.

[0040] The lead screw 703 of the present invention is preferably a ball screw. The contact switch 705 can be a travel limit switch, or other types of contact switches 705 that are turned on or off through displacement, can generate signals and output them to the PLC.

[0041] The present invention also discloses a method for adjusting the rollers of a husker, which is realized through the husker roller adjustment group 7 and includes the following steps:

[0042] Step 1: Electrically connect the air cylinder 701, the stepping motor 702, and the contact switch 705 to the husking control assembly 2, and make the contact switch 705 contact the stop plate 708. When the contact switch 705 is in the on state, proceed to Step 2;

[0043] Step 2: Start the husking control assembly 2, set the gap parameters between the fixed roller 5 and the moving roller 6, and set the operating air pressure of the air cylinder 701, then proceed to Step 3;

[0044] Step 3: The husking control assembly 2 controls the stepping motor 702 to rotate, driving the lead screw 703 to rotate, and the lead screw nut 704 generates displacement on the lead screw 703, then proceed to Step 4;

[0045] Step 4: The husking control assembly 2 controls the operation of the air cylinder 701. The air cylinder 701 pulls the moving roller 6 towards the fixed roller 5. When the moving roller 6 abuts against the fixed roller 5 and reaches the set operating air pressure of the air cylinder 701, the husking control assembly 2 controls the air cylinder 701 to stop working and controls the air cylinder 701 to maintain the current pulling force, then proceed to Step 5;

[0046] Step 5: The lead screw 703 continues to rotate driven by the stepper motor 702, thereby driving the lead screw nut 704 to continue moving towards the fixed roller 5. When the contact switch 705 separates from the stop plate 708, the contact switch 705 disconnects, and Step 6 is entered;

[0047] Step 6: The husking control component 2 controls the stepper motor 702 to rotate in the reverse direction, driving the lead screw 703 to rotate. The lead screw nut 704 generates displacement on the lead screw 703, thereby driving the moving bracket 4 and the moving roller 6 to move away from the fixed roller 5. When the lead screw nut 704 contacts the pin shaft 706 and the contact switch 705 contacts the stop plate 708, the husking control component 2 marks this position as the zero point, and Step 7 is entered;

[0048] Step 7: The stepper motor 702 continues to rotate in the reverse direction, and the lead screw nut 704 drives the moving bracket 4 to displace away from the fixed roller 5. Based on the zero point marked in Step 6, when the displacement value reaches the set gap parameter between the fixed roller 5 and the moving roller 6, the husking control component 2 controls the stepper motor 702 to stop working, and the gap adjustment between the fixed roller 5 and the moving roller 6 is completed.

[0049] In this embodiment, it also includes a manual adjustment step for the fixed roller 5 and the moving roller 6, which is specifically as follows:

[0050] According to the gap between the fixed roller 5 and the moving roller 6, the husking control component 2 controls the stepper motor 702 to rotate forward or backward. When the gap between the fixed roller 5 and the moving roller 6 is adjusted to the required husking gap, the husking control component 2 controls the stepper motor 702 to stop working.

[0051] To avoid the friction between the fixed roller 5 and the moving roller 6 during operation and reduce the burning of the rubber roller, it is necessary to keep the distance between the fixed roller 5 and the moving roller 6 greater than 0.5 mm. The function of the air cylinder 701 can only solve the problem of the fixed roller 5 and the moving roller 6 being pressed together, and cannot solve the problem of the gap between the fixed roller 5 and the moving roller 6. Through the cooperation of other components of the roller adjustment component 7 and the setting of the corresponding roller adjustment method, after each start-up of the husker, the zero point is searched for and marked, and then the distance between the fixed roller 5 and the moving roller 6 is determined through the marked zero point; in this way, even if the fixed roller 5 and the moving roller 6 are worn, the gap between the fixed roller 5 and the moving roller 6 can be kept at the set value, thereby reducing the wear of the fixed roller 5 and the moving roller 6 during the husking process.

[0052] By controlling the number, frequency, and direction of the pulses input to the stepper motor 702, its position, speed, and rotation direction can be accurately controlled to accurately control the displacement distance of the lead screw nut 704 on the lead screw 703, thereby controlling the gap between the fixed roller 5 and the moving roller 6.

[0053] Such as Figures 1 - 6As shown in the figure, the present invention also discloses a rice huller, which includes a roller adjustment assembly, a rice hulling body 1, and a rice hulling control assembly 2. The interior of the rice hulling body 1 is divided into two independent cavities, namely a rice hulling cavity and an adjustment cavity 101. The top of the rice hulling cavity is provided with a feed inlet 11 communicating with its interior. Inside the adjustment cavity 101, a fixed roller 5 and a moving roller 6 extending into the rice hulling cavity and arranged vertically are respectively connected through a fixed bracket 3 and a moving bracket 4. The moving bracket 4 moves relative to the inner side of the adjustment cavity 101. Inside the adjustment cavity 101, a first tensioning wheel 9 and a tensioning mechanism 8 are also provided. A conveyor belt 10 is arranged on the fixed roller 5, the moving roller 6, the first tensioning wheel 9, and the tensioning mechanism 8. The tensioning mechanism 8 contacts the conveyor belt 10 and tensions the conveyor belt 10 after the displacement of the moving roller 6.

[0054] In this embodiment, the tensioning mechanism 8 includes a tensioning mounting bracket 801 fixedly connected to the interior of the adjustment cavity 101. On one side of the tensioning mounting bracket 801, a rotating arm 802 rotatable relative to the tensioning mounting bracket 801 is provided through a rotating shaft 803. A second tensioning wheel 804 contacting the conveyor belt 10 and tensioning the conveyor belt 10 after the displacement of the moving roller 6 is arranged on the rotating arm 802. A elastic force adjusting component 805 is arranged between the rotating arm 802 and the tensioning mounting bracket 801.

[0055] In this embodiment, the elastic force adjusting component 805 includes a spring 8051. The two ends of the spring 8051 are respectively connected to the tensioning mounting bracket 801 and the rotating arm 802.

[0056] In this embodiment, first connecting parts 80511 are respectively arranged at the two ends of the spring 8051. The spring 8051 is respectively connected to the tensioning mounting bracket 801 and the rotating arm 802 through the first connecting parts 80511.

[0057] In this embodiment, a first connecting component 806 is arranged on the side of the tensioning mounting bracket 801. The first connecting component 806 includes a first connecting rod 8061. The first connecting part 80511 of the spring 8051 is connected to the first connecting rod 8061. A limit nut 8062 for restricting the movement of the first connecting part 80511 of the spring 8051 to the outside of the first connecting rod 8061 is arranged at the end of the first connecting rod 8061 away from the tensioning mounting bracket 801.

[0058] In this embodiment, a second connecting part 8021 is arranged on the rotating arm 802. The second connecting part 8021 is connected to the first connecting part 80511 of the spring 8051 through a second connecting component 8022.

[0059] In this embodiment, the second connection component 8022 includes a second connecting rod 80221 connected to the second connection portion 8021. A third connection portion 80222 is provided at one end of the second connecting rod 80221 away from the second connection portion 8021, and the third connection portion 80222 is connected to the first connection portion 80511 of the spring 8051.

[0060] One end of the second connecting rod 80221 away from the spring 8051 extends outside the adjustment cavity 101, and an adjustment handwheel 808 is provided at the end of the second connecting rod 80221 extending outside the adjustment cavity 101. The setting of the adjustment handwheel 808 enables the conveyor belt 10 to be tensioned by rotating the adjustment handwheel 808 when the conveyor belt 10 is worn, ensuring the service life of the conveyor belt 10. A reinforcing plate 807 is provided on one side of the tensioning mounting bracket 801 away from the rotating arm 802. The setting of the reinforcing plate 807 can ensure the strength of the structure of the tensioning mounting bracket 801.

[0061] Both the first connection portion 80511 and the third connection portion 80222 are hook-shaped, which is convenient for connection and also convenient for disassembly.

[0062] Grooves adapted to the conveyor belt 10 are provided on the outer surfaces of the first tensioning wheel 9 and the second tensioning wheel 804 to enhance the friction between the first tensioning wheel 9 and the second tensioning wheel 804 and the conveyor belt 10, improving the transmission stability. The tensioning mounting bracket 801 and the rotating arm 802 are made of high-strength materials, having good mechanical strength and fatigue resistance, and can ensure stable and reliable operation during long-term use.

[0063] When the conveyor belt 10 experiences displacement, slack, slippage, wear, etc., the tension of the conveyor belt 10 will change accordingly. At this time, the conveyor belt 10 acts on the tensioning wheel 804, causing the tensioning wheel 804 to drive the rotating arm 802 to rotate around the rotating shaft 803. Since one end of the spring 8051 is connected to the rotating arm 802 and the other end is fixed to the tensioning mounting bracket 801 connected to the hulling machine body 1, the rotation of the rotating arm 802 will cause the spring 8051 to undergo tensile or compressive deformation. The elastic force generated by the deformation of the spring 8051 acts on the rotating arm 802, and then provides a tensioning force for the conveyor belt 10 through the tensioning wheel 804, realizing the automatic tensioning of the conveyor belt 10 during the transmission process.

[0064] During the transmission of the conveyor belt 10, if the conveyor belt 10 becomes loose and the tension decreases, the second tensioning wheel 804 will be further pressed against the conveyor belt 10 under the elastic force of the spring 8051; if the tension of the conveyor belt 10 is too large, the second tensioning wheel 804 will overcome the elastic force of the spring 8051, causing the spring 8051 to deform further, thereby adjusting the tension degree and always keeping the conveyor belt 10 in a proper tension state. The setting of the first tensioning wheel 9, in cooperation with the second tensioning wheel 804, further ensures the tension state of the conveyor belt 10.

[0065] The above-described embodiments merely represent specific implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A rice husker roller adjustment assembly, the rice husker comprising at least a rice husker body and a rice husker control assembly, the interior of the rice husker body being divided into two independent cavities, a rice husker cavity and an adjustment cavity, the adjustment cavity being connected with a fixed roller and a movable roller extending into the rice husker cavity and arranged up and down through a fixed bracket and a movable bracket respectively, the movable bracket moving relative to the inner side of the adjustment cavity, characterized in that: The roller adjustment assembly includes a pin shaft, a stepper motor, a screw shaft, a guide rod, a contact switch and a cylinder. The pin shaft is arranged on a movable bracket. The stepper motor is connected to the screw shaft. A screw nut is provided on the screw shaft. The screw shaft and the guide rod both pass through the pin shaft and can move horizontally along the pin shaft. One end of the guide rod is connected to the screw nut. The contact switch is arranged on the movable bracket. A stop plate is provided on the side of the screw nut close to the contact switch. The contact switch contacts the stop plate as the movable bracket moves. The cylinder is connected to the movable bracket. The cylinder, stepper motor and contact switch are all electrically connected to the rice hulling control assembly.

2. A rice husker roller adjustment method, characterized in that: This is achieved by the roller adjustment assembly according to claim 1, comprising the following steps: Step 1: electrically connect the cylinder, stepper motor and contact switch to the rice husking control assembly, make the contact switch contact the stop plate, and the contact switch is in the on state, then proceed to step 2; Step 2: Start the rice husking control component, set the gap parameters between the fixed roller and the movable roller, set the cylinder operating pressure, and proceed to step 3; Step 3: The rice husking control component controls the stepper motor to rotate, driving the screw to rotate, and the screw nut is displaced on the screw, and then proceeds to step 4; Step 4: The rice husking control component controls the operation of the cylinder, and the cylinder pulls the movable roller to move toward the fixed roller. When the movable roller is pressed against the fixed roller and reaches the set cylinder operation pressure, the rice husking control component controls the cylinder to stop working and controls the cylinder to maintain the current pulling force, and enters step 5; Step 5: The screw continues to rotate driven by the stepper motor, thereby driving the screw nut to continue to move toward the fixed roller. When the contact switch is separated from the stop plate, the contact switch is disconnected, and the process proceeds to step 6. Step 6: The rice husking control component controls the stepper motor to rotate in the opposite direction, driving the screw to rotate. The screw nut is displaced on the screw, thereby driving the movable bracket and the movable roller to move away from the fixed roller. When the screw nut contacts the pin shaft and the contact switch contacts the stop plate, the rice husking control component marks this position as the zero point and enters step 7. Step seven, the stepper motor continues to rotate in the opposite direction, and the lead screw nut drives the movable bracket to move away from the fixed roller. Taking the zero point marked in step six as the reference, when the displacement value reaches the set gap parameter between the fixed roller and the movable roller, the rice husking control component controls the stepper motor to stop working, and the gap adjustment between the fixed roller and the movable roller is completed.

3. A rice husker roller adjustment method according to claim 2, characterized in that: It also includes the steps of manual adjustment of the fixed roller and the movable roller, as follows: According to the gap between the fixed roller and the movable roller, the stepper motor is controlled to rotate forward or reverse through the rice husking control component. When the gap between the fixed roller and the movable roller is adjusted to the required rice husking gap, the rice husking control component controls the stepper motor to stop working.

4. A rice husker, characterized in that: It comprises the roller adjustment assembly as claimed in claim 1, a rice husking machine body and a rice husking control assembly, the interior of the rice husking machine body being divided into two independent cavities, a rice husking chamber and an adjusting chamber, the top of the rice husking chamber being provided with a feed port communicating with the interior thereof, the interior of the adjusting chamber being connected with a fixed roller and a movable roller extending into the rice husking chamber and arranged up and down through a fixed bracket and a movable bracket respectively, the movable bracket moving relative to the inside of the adjusting chamber, the interior of the adjusting chamber being provided with a first tensioning wheel and a tensioning mechanism, the fixed roller, the movable roller, the first tensioning wheel and the tensioning mechanism being provided with a conveyor belt, the tensioning mechanism being in contact with the conveyor belt and tensioning the conveyor belt after the movable roller is displaced.

5. A rice husker according to claim 4, characterized in that: The tensioning mechanism includes a tensioning mounting bracket fixedly connected to the inside of the adjusting chamber, one side of the tensioning mounting bracket is provided with a rotating arm rotating relative to the tensioning mounting bracket through a rotating shaft, the rotating arm is provided with a second tensioning wheel which contacts the conveyor belt and tensions the conveyor belt after the moving roller is displaced, and an elastic force adjustment component is provided between the rotating arm and the tensioning mounting bracket.

6. A rice husker according to claim 5, characterized in that: The elastic force adjustment component comprises a spring, and two ends of the spring are respectively connected to the tensioning mounting bracket and the rotating arm.

7. A rice husker according to claim 6, characterized in that: The two ends of the spring are respectively provided with a first connecting portion, and the spring is respectively connected to the tensioning mounting bracket and the rotating arm through the first connecting portion.

8. A rice husker according to claim 7, characterized in that: A first connecting assembly is provided on the side of the tensioning mounting bracket, and the first connecting assembly includes a first connecting rod. The first connecting portion of the spring is connected to the first connecting rod, and a limiting nut is provided at one end of the first connecting rod away from the tensioning mounting bracket to limit the first connecting portion of the spring from moving to the outside of the first connecting rod.

9. A rice husker according to claim 8, characterized in that: The rotating arm is provided with a second connecting portion, and the second connecting portion is connected to the first connecting portion of the spring through a second connecting assembly.

10. A rice husker according to claim 9, characterized in that: The second connecting assembly includes a second connecting rod connected to the second connecting portion, and a third connecting portion is provided at one end of the second connecting rod away from the second connecting portion, and the third connecting portion is connected to the first connecting portion of the spring.

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