Pneumatic thresher with cylinder combination and back-off function
By combining servo motors, ball screws, and sensors, precise cylinder engagement and automated retraction of the fast and slow rollers of the pneumatic rice huller are achieved, solving the problems of complex gap control and easy equipment damage in existing technologies, and improving processing efficiency and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 四川钭进科技有限公司
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-03
AI Technical Summary
Existing rice hullers suffer from complex operation and low precision in controlling the gap between the fast and slow rollers, making it difficult to achieve gapless cylinder engagement and accurate retraction. Furthermore, the lack of effective limiting devices makes the equipment prone to damage, affecting processing efficiency and lifespan.
The system employs a servo motor, ball screw, and sensor combined with a PLC control module to achieve precise cylinder closing and automated retraction of the fast and slow rollers. The slow roller is driven by a cylinder to quickly close to a gapless state, and sensors and limit devices are used to avoid collisions. The combination of ball screw and plum blossom coupling reduces transmission errors.
It achieves precise control of the gap between the fast and slow rollers, improves the quality and efficiency of rice hulling, reduces the intensity of manual operation, extends the equipment life, and adapts to the processing needs of different rice varieties.
Smart Images
Figure CN224443097U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic rice hullers, and in particular to a pneumatic rice huller with a cylinder retraction function. Background Technology
[0002] The rice huller is a key piece of equipment in the rice processing process, which dehulls the rice through the relative movement of fast and slow rollers. Current rice hullers have shortcomings in the control of the gap between the fast and slow rollers: traditional rice hullers mostly use mechanical transmission to adjust the gap and engage the fast and slow rollers, which is complicated to operate and has low precision, making it difficult to ensure zero gap when engaging the rollers and the accuracy of the gap after retraction.
[0003] Existing pneumatic rice hullers often require manual operation after stopping the machine when adjusting the gap, which cannot flexibly adjust the gap width according to processing needs, affecting processing efficiency. Furthermore, during the cylinder closing process, there is a lack of effective limit and sensing devices, which can easily lead to roller collision damage and reduce the service life of the equipment. Therefore, we propose a pneumatic rice huller with a cylinder closing and retraction function. Utility Model Content
[0004] In view of this, this application provides a pneumatic rice huller with cylinder retraction function, which solves the above technical problems to a certain extent.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A pneumatic rice huller with cylinder retraction function includes a motor base mounted on top of the pneumatic rice huller. A servo motor is fixedly mounted on one side of the motor base. A precision swivel coupling is fixedly mounted on the output end of the servo motor. A ball screw is fixedly mounted on one side of the precision swivel coupling. A ball nut is threaded onto the outer side of the ball screw. A positioning block is fixedly mounted on one side of the ball nut. A sensor is fixedly mounted on one side of the positioning block.
[0007] As a further improvement to the above solution, a cylinder seat is provided on one side of the motor base, and a cylinder body is fixedly installed on one side of the cylinder seat. A slow roller is provided at the output end of the cylinder body, and a fast roller is installed on the front side of the pneumatic rice huller. The slow roller and the fast roller are arranged opposite to each other.
[0008] As a further improvement to the above solution, guide posts are fixedly installed at the four corners of one side of the motor base, and the positioning block is slidably installed on the outside of the guide posts.
[0009] As a further improvement to the above solution, the servo motor and the cylinder body are electrically connected to a PLC control module, and the sensor is electrically connected to the PLC control module.
[0010] As a further improvement to the above solution, the outer side of the ball screw is provided with external threads, the inner side of the guide post is provided with internal threads, and a guide groove is provided on one side of the positioning block, with the guide post fitting into the guide groove.
[0011] As a further improvement to the above solution, the pneumatic rice huller includes a feed bin and a processing seat, with the fast roller and slow roller positioned in front of the processing seat.
[0012] As a further improvement to the above solution, the cylinder body can drive the slow roller to quickly close to the fast roller until there is no gap when it is working.
[0013] As a further improvement to the above solution, the precision plum blossom coupling enables a flexible connection between the servo motor and the ball screw, thereby reducing transmission errors.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] (1) The present invention provides a pneumatic rice huller with cylinder closing and retraction function. The slow roller is driven by a cylinder to close quickly. Combined with the precise control of servo motor, ball screw and sensor, it ensures that there is no gap when the fast roller and slow roller close, and the gap distance after retraction is accurate, which improves the quality of rice hulling. The gap distance between the fast roller and slow roller can be adjusted at any time without stopping the machine for manual operation. It can adapt to the rice hulling needs of different varieties and different processing requirements, and improves the processing efficiency and equipment adaptability.
[0016] (2) The pneumatic rice huller with cylinder closing and retraction function of this utility model is controlled by PLC control module and PC program for the entire cylinder closing and retraction process, realizing automated operation, reducing manual intervention and reducing the labor intensity of operators; the sensor and limit device are installed to avoid collision damage between the slow roller and the fast roller due to excessive movement during cylinder closing, protecting the roller body and extending the service life of the equipment.
[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of a pneumatic rice huller with cylinder retraction function proposed in this utility model;
[0019] Figure 2 It shows Figure 1 A schematic diagram of the three-dimensional structure of part A in the diagram;
[0020] Figure 3 This diagram shows a partial structural side view of a pneumatic rice huller with cylinder retraction function according to an embodiment of this application;
[0021] Figure 4 This diagram shows a top view of a portion of the structure of a pneumatic rice huller with cylinder retraction function according to an embodiment of this application.
[0022] Figure label:
[0023] 1. Motor base; 2. Servo motor; 3. Precision plum blossom coupling; 4. Cylinder body; 5. Positioning block; 6. Sensor; 7. Cylinder base; 8. Fast roller; 9. Slow roller; 10. Ball nut; 11. Guide post; 12. Ball screw. Detailed Implementation
[0024] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings;
[0025] The structure of this utility model will now be described in detail with reference to the accompanying drawings.
[0026] refer to Figure 1-4 A pneumatic rice huller with cylinder retraction function includes a motor base 1 mounted on top of the pneumatic rice huller. A servo motor 2 is fixedly mounted on one side of the motor base 1. A precision plum blossom coupling 3 is fixedly mounted on the output end of the servo motor 2. A ball screw 12 is fixedly mounted on one side of the precision plum blossom coupling 3. A ball nut 10 is threaded on the outer side of the ball screw 12. A positioning block 5 is fixedly mounted on one side of the ball nut 10. A sensor 6 is fixedly mounted on one side of the positioning block 5.
[0027] In this embodiment, a cylinder seat 7 is provided on one side of the motor base 1, a cylinder body 4 is fixedly installed on one side of the cylinder seat 7, a slow roller 9 is provided at the output end of the cylinder body 4, a fast roller 8 is installed on the front side of the pneumatic rice huller, and the slow roller 9 and the fast roller 8 are arranged opposite to each other.
[0028] In this embodiment, guide posts 11 are fixedly installed at the four corners of one side of the motor base 1, and positioning blocks 5 are slidably installed on the outside of the guide posts 11.
[0029] In this embodiment, the servo motor 2 and the cylinder body 4 are electrically connected to a PLC control module, and the sensor 6 is electrically connected to the PLC control module. The PLC control module is an existing device that allows personnel to adjust the positions of the fast roller 8 and the slow roller 9 via a touch panel, and can automatically adjust the positions of the fast roller 8 and the slow roller 9 by sensing the positions of the fast roller 8 and the slow roller 9 via the sensor 6.
[0030] In this embodiment, the outer side of the ball screw 12 is provided with an external thread, the inner side of the guide post 11 is provided with an internal thread, and a guide groove is provided on one side of the positioning block 5. The guide post 11 fits into the guide groove. The combination of the external and internal threads allows the ball screw 12 to move the positioning block 5, which is limited by the guide post 11, after rotation, and also makes the adjustment more accurate.
[0031] In this embodiment, the pneumatic rice huller includes a feeding hopper and a processing base. The fast roller 8 and the slow roller 9 are located in front of the processing base. When the sensor 6 reaches the limit device of the slow roller 9, the sensor 6 sends a signal to the PLC control module. The PLC control module can control the servo motor 2 to stop working, and the ball nut 10 and the sensor 6 stop moving. This position is the base point where the fast roller 8 and the slow roller 9 close without gap. Subsequently, the PLC control module sends a signal to the servo motor 2 again to make it work again, driving the ball nut 10 to continue moving towards the slow roller 9, driving the slow roller 9 to move, so that the fast roller 8 and the slow roller 9 separate from the closed state without gap to a state with a gap of a specific distance. This gap distance is controllable and the width can be adjusted at any time.
[0032] In this embodiment, when the cylinder body 4 is working, it can drive the slow roller 9 to quickly close to the fast roller 8 to a gapless state; the sensor 6 is installed on the ball nut 10 and moves together with the ball nut 10; a positioning block 5 and a limiting device are provided on one side of the slow roller 9 to limit the position of the slow roller 9; the cylinder body 4 is installed on the cylinder seat 7, and its output end is associated with the slow roller 9 to drive the slow roller 9 to move; the fast roller 8 is arranged opposite to the slow roller 9 to form the working area for rice hulling; the sensor 6 is prior art, so it is not described in detail in this article.
[0033] In this embodiment, the precision plum blossom coupling 3 enables a flexible connection between the servo motor 2 and the ball screw 12 to reduce transmission errors; the motor base 1 is used to install the servo motor 2, which is connected to the ball screw 12 through the precision plum blossom coupling 3. A ball nut 10 is installed on the ball screw 12, and the guide post 11 is connected to the ball nut 10 to guide the movement of the ball nut 10.
[0034] Specifically, the motor base 1 is used to install the servo motor 2, which is connected to the ball screw 12 via a precision plum blossom coupling 3. A ball nut 10 is fitted on the ball screw 12, and a guide post 11 is connected to the ball nut 10 to guide its movement. A sensor 6 is installed on the ball nut 10 and moves with it. A positioning block 5 and a limiting device are provided on one side of the slow roller 9 to limit its position. The cylinder body 4 is installed on the cylinder base 7, and its output end is associated with the slow roller 9 to drive its movement. The fast roller 8 is arranged opposite to the slow roller 9 to form the working area for rice hulling.
[0035] When the rice huller starts operating normally, the cylinder body 4 begins to work, driving the slow roller 9 to quickly close towards the fast roller 8 until there is no gap between them. At this time, the servo motor 2 starts to work, driving the ball screw 12 to rotate clockwise through the precision plum blossom coupling 3, causing the ball nut 10 and the sensor 6 to move along the guide post 11 towards the slow roller 9. When the sensor 6 reaches the limit device of the slow roller 9, the sensor 6 sends a signal to the PLC control module, which controls the servo motor 2 to stop working, and the ball nut 10 and the sensor 6 to stop moving. This position is the base point for the fast roller 8 and the slow roller 9 to close without gap. Subsequently, the PLC control module sends a signal to the servo motor 2 again to make it work a second time, driving the ball nut 10 to continue moving towards the slow roller 9, driving the slow roller 9 to move, so that the fast roller 8 and the slow roller 9 separate from the closed state without gap to a state with a gap of a specific distance. This gap distance is controllable and the width can be adjusted at any time.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pneumatic thresher with cylinder combination and back-off function, characterized in that, include: A motor base (1) is installed above the pneumatic rice huller. A servo motor (2) is fixedly installed on one side of the motor base (1). A precision plum blossom coupling (3) is fixedly installed at the output end of the servo motor (2). A ball screw (12) is fixedly installed on one side of the precision plum blossom coupling (3). A ball nut (10) is installed on the outer thread of the ball screw (12). A positioning block (5) is fixedly installed on one side of the ball nut (10). A sensor (6) is fixedly installed on one side of the positioning block (5).
2. The pneumatic thresher with cylinder retracting function according to claim 1, characterized in that, A cylinder seat (7) is provided on one side of the motor base (1), and a cylinder body (4) is fixedly installed on one side of the cylinder seat (7). A slow roller (9) is provided at the output end of the cylinder body (4), and a fast roller (8) is installed on the front side of the pneumatic rice huller. The slow roller (9) and the fast roller (8) are arranged opposite to each other.
3. The pneumatic thresher with cylinder retracting function according to claim 1, characterized in that, The motor base (1) has guide posts (11) fixedly installed at the four corners of one side, and the positioning block (5) is slidably installed on the outside of the guide posts (11).
4. The pneumatic thresher with cylinder retracting function according to claim 1, characterized in that, The servo motor (2) and the cylinder body (4) are electrically connected to a PLC control module, and the sensor (6) is electrically connected to the PLC control module.
5. The pneumatic thresher with cylinder return function according to claim 3, characterized in that, The ball screw (12) has an external thread on its outer side, the guide post (11) has an internal thread on its inner side, and the positioning block (5) has a guide groove on one side, with the guide post (11) fitting into the guide groove.
6. The pneumatic thresher with cylinder retracting function according to claim 2, characterized in that, The pneumatic rice huller includes a feed bin and a processing seat, with the fast roller (8) and slow roller (9) positioned in front of the processing seat.
7. The pneumatic thresher with cylinder retracting function according to claim 2, characterized in that, When the cylinder body (4) is working, it can drive the slow roller (9) to quickly close to the fast roller (8) until there is no gap.
8. The pneumatic thresher with cylinder retracting function according to claim 1, characterized in that, The precision plum blossom coupling (3) enables a flexible connection between the servo motor (2) and the ball screw (12) to reduce transmission errors.