A rice huller roller adjusting assembly and a rice huller

Abstract

The utility model discloses a rice huller roller adjustment subassembly and rice huller, the roller adjustment subassembly includes pin shaft, step motor, screw rod, guide rod, contact switch and pneumatic cylinder, the pin shaft sets up on the mobile support, the step motor is connected with screw rod, be equipped with screw rod nut on the screw rod, the screw rod and guide rod all pass through the pin shaft and can move along the pin shaft horizontally, the guide rod one end is connected with screw rod nut, the contact switch sets up on the mobile support, one side of screw rod nut is equipped with the stop board close to the contact switch, the contact switch is along with the mobile support and stops the board contact of moving, the pneumatic cylinder is connected with the mobile support. The utility model discloses through to the static accurate adjustment of fixed roller and moving roller gap, improves the effect of rice huller, prolongs fixed roller and moving roller life, and reduces production cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of rice hulling equipment, specifically relating to a rice hulling machine roller adjustment assembly and a rice hulling machine. Background Technology

[0002] In rice hulling operations, the adjustment of the gap between the rubber rollers of the rice huller plays a crucial role in the hulling effect. Existing methods for adjusting the rubber rollers in rice hullers have several shortcomings. Most pneumatic rice hullers use direct friction between the moving and stationary rubber rollers. This method results in rapid roller wear, a short service life, and frequent roller replacements, increasing production costs and maintenance workload. Furthermore, traditional adjustment methods struggle to precisely control the roller gap, leading to unstable hulling results and impacting production efficiency and product quality. Therefore, there is an urgent need for a device and method that can automatically and precisely adjust the gap between the rubber rollers of the rice huller to improve roller durability and hulling effect.

[0003] In the operation of rice hullers, conveyor belt drive is a common power transmission method. However, in traditional rice huller conveyor belt drive systems, the conveyor belt can become loose over time, leading to reduced transmission efficiency and even slippage, affecting the normal operation of the rice huller. Furthermore, existing rice hullers require adjustments to the gap between the moving and fixed rollers based on the rice being hulled; after adjustment, the conveyor belt also needs to be re-tensioned. Current tensioning methods are mostly manual, requiring operators to periodically check and manually adjust the tension, which is cumbersome and makes it difficult to ensure the conveyor belt is always at optimal tension under different operating conditions, failing to meet the requirements for efficient and stable operation of rice hullers. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a rice hulling machine that improves the rice hulling effect, extends the service life of the fixed roller and the moving roller, and reduces production costs by statically and precisely adjusting the gap between the fixed roller and the moving roller. The tensioning mechanism solves the problem of inconvenient tensioning and difficulty in automatically maintaining the optimal tension in the existing rice hulling machine conveyor belt transmission system.

[0005] The technical solution adopted by this utility model is: a rice huller, which includes at least a rice huller body and a rice huller control assembly. The rice huller body is internally divided into two independent cavities: a rice hulling cavity and an adjustment cavity. A fixed roller and a movable roller, extending into the rice hulling cavity and arranged vertically, are connected to the adjustment cavity via a fixed bracket and a movable bracket, respectively. The movable bracket moves relative to the inner side of the adjustment cavity. The roller adjustment assembly includes a pin, a stepper motor, a lead screw, a guide rod, a contact switch, and a cylinder. The pin is configured... On the movable support, the stepper motor is connected to the lead screw, and the lead screw is provided with a lead screw nut. The lead screw and the guide rod both pass through the pin and can move horizontally along the pin. One end of the guide rod is connected to the lead screw nut. The contact switch is set on the movable support. A stop plate is provided on the side of the lead screw nut near the contact switch. The contact switch contacts the stop plate as the movable support moves. The cylinder is connected to the movable support. The cylinder, the stepper motor and the contact switch are all electrically connected to the rice hulling control component.

[0006] This utility model also discloses a rice huller, including a roller adjustment assembly, a rice huller body, and a rice huller control assembly. The rice huller body is divided into two independent cavities: a rice hulling cavity and an adjustment cavity. The top of the rice hulling cavity is provided with a feed inlet communicating with its interior. The adjustment cavity is connected by a fixed bracket and a movable bracket, respectively, to a fixed roller and a movable roller extending into the rice hulling cavity and arranged vertically. The movable bracket moves relative to the inside of the adjustment cavity. The adjustment cavity is also provided with a first tensioning wheel and a tensioning mechanism. A conveyor belt is provided on the fixed roller, the movable roller, the first tensioning wheel, and the tensioning mechanism. The tensioning mechanism contacts the conveyor belt and tensions the conveyor belt after the movable roller is displaced.

[0007] 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 that rotates relative to the tensioning mounting bracket via a rotating shaft. The rotating arm is provided with a second tensioning wheel that contacts the conveyor belt and tensions the conveyor belt after the moving roller is displaced. An elastic adjustment component is provided between the rotating arm and the tensioning mounting bracket.

[0008] In one embodiment, the elastic adjustment assembly includes a spring, the two ends of which are connected to a tension mounting bracket and a rotating arm, respectively.

[0009] In one embodiment, the spring is provided with a first connecting part at each end, and the spring is connected to the tensioning mounting bracket and the rotating arm respectively through the first connecting part.

[0010] In one embodiment, the tensioning mounting bracket has a first connecting assembly on its side. The first connecting assembly includes a first connecting rod. The first connecting part of the spring is connected to the first connecting rod. The end of the first connecting rod away from the tensioning mounting bracket is provided with a limiting nut to restrict the movement of the first connecting part of the spring to the outside of the first connecting rod.

[0011] In one embodiment, the rotating arm is provided with a second connecting part, which is connected to the first connecting part of the spring through a second connecting assembly.

[0012] In one embodiment, 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, the third connecting portion being connected to the first connecting portion of the spring.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model realizes 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, and improves production efficiency and product quality.

[0015] 2. The device not only has an automatic adjustment function, but also a manual adjustment mode, which increases the flexibility and convenience of operation and can adapt to different production needs;

[0016] 3. The tensioning mechanism provides tension through springs and can automatically adjust the tension according to changes in the conveyor belt tension, eliminating the need for frequent manual adjustments and greatly improving work efficiency.

[0017] 4. The tensioning mechanism has a simple structure, is easy to install, and has high reliability, which can effectively extend the service life of the conveyor belt and reduce the maintenance cost of the equipment. At the same time, the stable tension ensures the efficient and stable operation of the rice huller conveyor belt transmission system and improves the overall working performance of the rice huller. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the roller adjustment assembly structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a block diagram showing the electrical connections of the components of this invention;

[0021] Figure 4 This is a schematic diagram of the structure of the rice huller of the present invention;

[0022] Figure 5 This is a schematic diagram of the tensioning mechanism of the present invention;

[0023] Figure 6 This is a left view of the tensioning mechanism of the present invention.

[0024] In the diagram: 1. Rice huller body; 2. Rice hulling control components; 3. Fixed bracket; 4. Moving bracket; 5. Fixed roller; 6. Moving roller; 7. Roller adjustment assembly; 8. Tensioning mechanism; 9. First tensioning wheel; 10. Conveyor belt; 11. Feed inlet; 101. Adjustment chamber; 701. Cylinder; 702. Stepper motor; 703. Lead screw; 704. Lead screw nut; 705. Contact switch; 706. Pin; 707. Guide rod; 708. Stop plate; 709. Connecting plate; 801. Tensioning mounting bracket; 802. Rotating arm; 803. Rotating shaft; 804. Second tensioning wheel; 805. Spring adjustment assembly; 806. First connecting assembly; 807. Reinforcing plate; 808. Adjusting handwheel; 8021. Second connecting part; 8022. Second connecting assembly; 80221. Second connecting rod; 80222. Third connecting part; 8051. Spring; 80511. First connecting part; 8061. First connecting rod; 8062. Limit nut. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-3As shown, this utility model discloses a rice huller roller adjustment assembly. The rice huller includes at least a rice huller body 1 and a rice huller control assembly 2. The rice huller body 1 is internally divided into two independent cavities: a rice hulling cavity and an adjustment cavity 101. A fixed roller 5 and a movable roller 6, extending into the rice hulling cavity and arranged vertically, are connected to the adjustment cavity 101 via a fixed bracket 3 and a movable bracket 4, respectively. The movable bracket 4 moves relative to the inner side of the adjustment cavity 101. The roller adjustment assembly 7 includes a pin 706, a stepper motor 702, a lead screw 703, a guide rod 707, a contact switch 705, and a cylinder 701. The pin 706 is mounted on the movable bracket 4. The stepper motor... Motor 702 is connected to lead screw 703. Lead screw 703 is provided with lead screw nut 704. Lead screw 703 and guide rod 707 both pass through pin 706 and can move horizontally along pin 706. One end of guide rod 707 is connected to lead screw nut 704. Contact switch 705 is provided on moving bracket 4. Stop plate 708 is provided on the side of lead screw nut 704 near contact switch 705. Contact switch 705 contacts stop plate 708 as moving bracket 4 moves. Cylinder 701 is connected to moving bracket 4. Cylinder 701, stepper motor 702 and contact switch 705 are all electrically connected to rice hulling control component 2.

[0027] The contact switch 705 is mounted on the movable bracket 4 via the connecting plate 709.

[0028] In the roller adjustment assembly, cylinder 701 is used to pull the moving roller 6 towards the fixed roller 5 in its initial state. The magnitude of its force can be adjusted by air pressure, and this force is the inter-roller pressure during the hulling process. Contact switch 705 is used to provide feedback signals to control the operation of stepper motor 702. Lead screw 703 cooperates with lead screw nut 704 to convert the rotational force of stepper motor 702 into displacement along lead screw 703.

[0029] The rice hulling control component 2 includes at least a PLC and a human-machine interface (HMI). The PLC receives signals from the cylinder 701, stepper motor 702, and contact switch 705, and controls the operating status of the cylinder 701 and stepper motor 702. The HMI is used to input the gap parameters between the fixed roller 5 and the moving roller 6, and to set the operating air pressure of the cylinder 701. The distance between the fixed roller 5 and the moving roller 6 can also be manually adjusted through the HMI. The PLC controls the operating air pressure of the cylinder 701 through an air pressure regulating valve.

[0030] The lead screw 703 of this invention is preferably a ball screw. The contact switch 705 can be a travel limit switch, or other types of contact switches 705 that can be connected or disconnected by displacement, generate signals, and output to the PLC.

[0031] The rice huller roller adjustment group 7 of this utility model includes a rice huller roller adjustment method, comprising the following steps:

[0032] Step 1: Electrically connect cylinder 701, stepper motor 702 and contact switch 705 to the control assembly 2. Make contact switch 705 contact stop plate 708. When contact switch 705 is in the ON state, proceed to step 2.

[0033] Step 2: Start the rice hulling control component 2, set the gap parameters between the fixed roller 5 and the moving roller 6, set the operating air pressure of cylinder 701, and proceed to step 3;

[0034] Step 3: The rice hulling control component 2 controls the stepper motor 702 to rotate, which drives the lead screw 703 to rotate. The lead screw nut 704 is displaced on the lead screw 703, and then proceeds to step 4.

[0035] Step 4: The rice hulling control component 2 controls the cylinder 701 to run. The cylinder 701 pulls the moving roller 6 towards the fixed roller 5. When the moving roller 6 and the fixed roller 5 are pressed together and the set operating air pressure of the cylinder 701 is reached, the rice hulling control component 2 controls the cylinder 701 to stop working and controls the cylinder 701 to maintain the current pulling force, and proceeds to step 5.

[0036] Step 5: The lead screw 703 continues to rotate under the drive of 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 is disconnected, and the process proceeds to step 6.

[0037] Step 6: The rice hulling control component 2 controls the stepper motor 702 to rotate in the opposite direction, driving the lead screw 703 to rotate. The lead screw nut 704 is displaced 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 706 and the contact switch 705 contacts the stop plate 708, the rice hulling control component 2 marks this position as the zero point and proceeds to step 7.

[0038] Step 7: Stepper motor 702 continues to rotate in the opposite direction, and lead screw nut 704 drives the moving bracket 4 to move away from the fixed roller 5. Taking the zero point marked in step 6 as the reference, when the displacement value reaches the set gap parameter between the fixed roller 5 and the moving roller 6, the rice hulling control component 2 controls stepper motor 702 to stop working, and the gap adjustment between the fixed roller 5 and the moving roller 6 is completed.

[0039] A method for adjusting the rollers of a rice huller also includes a manual adjustment step for the fixed roller 5 and the movable roller 6, as detailed below:

[0040] Based on the gap between the fixed roller 5 and the moving roller 6, the stepper motor 702 is controlled to rotate forward or backward by the hull control component 2. When the gap between the fixed roller 5 and the moving roller 6 is adjusted to the required hull gap, the hull control component 2 controls the stepper motor 702 to stop working.

[0041] To avoid friction between the fixed roller 5 and the moving roller 6 during operation and reduce the burning of the rollers, the distance between the fixed roller 5 and the moving roller 6 needs to be greater than 0.5mm. However, the cylinder 701 can only solve the problem of the fixed roller 5 and the moving roller 6 being close together, but it cannot solve the problem of the gap between the fixed roller 5 and the moving roller 6. By cooperating with other components of the roller adjustment assembly 7 and setting the corresponding roller adjustment method, the zero point is found and marked after each start-up of the rice huller, and then the distance between the fixed roller 5 and the moving roller 6 is determined by the marked zero point. In this way, even if the fixed roller 5 and the moving roller 6 wear down, the gap between the fixed roller 5 and the moving roller 6 can be maintained at the set value, thereby reducing the wear of the fixed roller 5 and the moving roller 6 during the rice hulling process.

[0042] By controlling the number, frequency, and direction of the input pulses to the stepper motor 702, its position, speed, and direction can be precisely controlled, thereby precisely controlling the displacement distance of the lead screw nut 704 on the lead screw 703, and thus controlling the gap between the fixed roller 5 and the moving roller 6.

[0043] like Figures 1-6 As shown, this utility model also discloses a rice huller, including a roller adjustment assembly, a rice huller body 1, and a rice huller control assembly 2. The rice huller body 1 is divided into two independent cavities: 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. The adjustment cavity 101 is connected to a fixed roller 5 and a movable roller 6 extending into the rice hulling cavity and arranged vertically, respectively, by a fixed bracket 3 and a movable bracket 4. The movable bracket 4 moves relative to the inside of the adjustment cavity 101. The adjustment cavity 101 is also provided with a first tensioning wheel 9 and a tensioning mechanism 8. A conveyor belt 10 is provided on the fixed roller 5, the movable 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 movable roller 6 is displaced.

[0044] In this embodiment, the tensioning mechanism 8 includes a tensioning mounting bracket 801 fixedly connected to the inside of the adjustment cavity 101. One side of the tensioning mounting bracket 801 is provided with a rotating arm 802 that rotates relative to the tensioning mounting bracket 801 via a rotating shaft 803. The rotating arm 802 is provided with a second tensioning wheel 804 that contacts the conveyor belt 10 and tensions the conveyor belt 10 after the moving roller 6 is displaced. An elastic adjustment component 805 is provided between the rotating arm 802 and the tensioning mounting bracket 801.

[0045] In this embodiment, the elastic adjustment component 805 includes a spring 8051, the two ends of which are connected to the tension mounting bracket 801 and the rotating arm 802, respectively.

[0046] In this embodiment, the spring 8051 has a first connecting part 80511 at both ends, and the spring 8051 is connected to the tensioning mounting bracket 801 and the rotating arm 802 respectively through the first connecting part 80511.

[0047] In this embodiment, the tensioning mounting bracket 801 is provided with a first connecting component 806 on its side. 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. The end of the first connecting rod 8061 away from the tensioning mounting bracket 801 is provided with a limiting nut 8062 that restricts the first connecting part 80511 of the spring 8051 from moving to the outside of the first connecting rod 8061.

[0048] In this embodiment, the rotating arm 802 is provided with a second connecting part 8021, and the second connecting part 8021 is connected to the first connecting part 80511 of the spring 8051 through the second connecting component 8022.

[0049] In this embodiment, the second connecting component 8022 includes a second connecting rod 80221 connected to the second connecting part 8021. The end of the second connecting rod 80221 away from the second connecting part 8021 is provided with a third connecting part 80222. The third connecting part 80222 is connected to the first connecting part 80511 of the spring 8051.

[0050] The end of the second connecting rod 80221 away from the spring 8051 extends to the outside of the adjusting cavity 101, and an adjusting handwheel 808 is provided at the end of the second connecting rod 80221 extending to the outside of the adjusting cavity 101. The adjusting handwheel 808 allows the conveyor belt 10 to be tensioned by rotating the adjusting handwheel 808 when wear occurs, ensuring the service life of the conveyor belt 10. A reinforcing plate 807 is provided on the side of the tensioning mounting bracket 801 away from the rotating arm 802. The reinforcing plate 807 ensures the structural strength of the tensioning mounting bracket 801.

[0051] Both the first connecting part 80511 and the third connecting part 80222 are hook-shaped, which facilitates connection and disassembly.

[0052] The outer surfaces of the first tensioning roller 9 and the second tensioning roller 804 are provided with grooves adapted to the conveyor belt 10 to enhance the friction between the first tensioning roller 9 and the second tensioning roller 804 and the conveyor belt 10, thereby improving transmission stability. The tensioning mounting bracket 801 and the rotating arm 802 are made of high-strength materials, possessing good mechanical strength and fatigue resistance, ensuring stable and reliable operation during long-term use.

[0053] When the conveyor belt 10 experiences displacement, slack, slippage, or wear, 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 rice 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 tension to the conveyor belt 10 through the tensioning wheel 804, realizing the automatic tensioning of the conveyor belt 10 during the transmission process.

[0054] During the transmission process of the conveyor belt 10, if the conveyor belt 10 becomes slack and the tension decreases, the second tensioning pulley 804 will further tighten the conveyor belt 10 under the elastic force of the spring 8051. If the tension of the conveyor belt 10 is too high, the second tensioning pulley 804 will overcome the elastic force of the spring 8051, causing the spring 8051 to deform further, thereby adjusting the tension and always maintaining the conveyor belt 10 in a suitable tension state. The setting of the first tensioning pulley 9, in conjunction with the second tensioning pulley 804, further ensures the tension state of the conveyor belt 10.

[0055] The above-described embodiments merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A rice huller roller adjustment assembly, the rice huller comprising at least a rice huller body and a rice hulling control assembly, wherein the rice huller body is internally divided into two independent cavities: a rice hulling cavity and an adjustment cavity. A fixed roller and a movable roller, extending into the rice hulling cavity and arranged vertically, are respectively connected to the adjustment cavity via a fixed bracket and a movable bracket. The movable bracket moves relative to the inner side of the adjustment cavity. The assembly is characterized in that... The roller adjustment assembly includes a pin, a stepper motor, a lead screw, a guide rod, a contact switch, and a cylinder. The pin is mounted on a movable support. The stepper motor is connected to the lead screw, and a lead screw nut is provided on the lead screw. Both the lead screw and the guide rod pass through the pin and can move horizontally along the pin. One end of the guide rod is connected to the lead screw nut. The contact switch is mounted on the movable support, and a stop plate is provided on the side of the lead screw nut near the contact switch. The contact switch contacts the stop plate as the movable support moves. The cylinder is connected to the movable support. The cylinder, stepper motor, and contact switch are all electrically connected to the rice hulling control assembly.

2. A rice huller, characterized in that, The invention includes the roller adjustment assembly, rice hulling machine body, and rice hulling control assembly as described in claim 1. The rice hulling machine body is internally divided into two independent cavities: a rice hulling cavity and an adjustment cavity. The top of the rice hulling cavity is provided with a feed inlet communicating with its interior. The adjustment cavity is connected by a fixed bracket and a movable bracket, respectively, to a fixed roller and a movable roller extending into the rice hulling cavity and arranged vertically. The movable bracket moves relative to the inside of the adjustment cavity. The adjustment cavity is also provided with a first tensioning wheel and a tensioning mechanism. A conveyor belt is provided on the fixed roller, the movable roller, the first tensioning wheel, and the tensioning mechanism. The tensioning mechanism contacts the conveyor belt and tensions the conveyor belt after the movable roller is displaced.

3. A rice huller according to claim 2, characterized in that: 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 that rotates relative to the tensioning mounting bracket via a rotating shaft. The rotating arm is provided with a second tensioning wheel that contacts the conveyor belt and tensions the conveyor belt after the moving roller is displaced. An elastic adjustment component is provided between the rotating arm and the tensioning mounting bracket.

4. A rice huller according to claim 3, characterized in that: The elastic adjustment assembly includes a spring, the two ends of which are connected to a tension mounting bracket and a rotating arm, respectively.

5. A rice huller according to claim 4, characterized in that: The spring is provided with a first connecting part at each end, and the spring is connected to the tensioning mounting bracket and the rotating arm respectively through the first connecting part.

6. A rice huller according to claim 5, characterized in that: The tensioning mounting bracket has a first connecting assembly on its side. The first connecting assembly includes a first connecting rod. The first connecting part of the spring is connected to the first connecting rod. The end of the first connecting rod away from the tensioning mounting bracket is provided with a limiting nut to restrict the movement of the first connecting part of the spring to the outside of the first connecting rod.

7. A rice huller according to claim 6, characterized in that: The rotating arm is provided with a second connecting part, which is connected to the first connecting part of the spring through a second connecting assembly.

8. A rice huller according to claim 7, 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 the end of the second connecting rod away from the second connecting portion, the third connecting portion being connected to the first connecting portion of the spring.

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