Permanent magnet motor driving type rice huller
By using a permanent magnet motor direct drive and an axial flow fan for heat dissipation, the high energy consumption and control difficulty of existing rice hullers during low-speed operation are solved, achieving high efficiency, energy saving and convenient operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG LIANGGONG MASCH TECH CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-04-28
AI Technical Summary
The existing rice hullers driven by dual frequency conversion motors have low magnetic flux intensity when running at low speeds, resulting in unstable torque output, increased control difficulty, unstable mechanical motion, increased energy consumption, and more electrical energy consumption.
The machine adopts a direct-drive method with a permanent magnet motor. The fixed rubber roller is directly driven by the first permanent magnet motor, while the movable rubber roller is driven by the active pulley, the driven pulley, and the transmission belt, which reduces the energy loss of electrical energy converted into magnetic field. The machine also uses an axial flow fan to dissipate heat and clean the inside of the machine.
It improves the efficiency of permanent magnet motors, reduces energy consumption, enhances the durability of drive belts, and provides operators with better heat dissipation and easier cleaning of the control panel.
Smart Images
Figure CN224167558U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rice hulling machine technology, and specifically relates to a rice hulling machine driven by a permanent magnet motor. Background Technology
[0002] A rice huller is a grain processing machine that removes the husk from paddy rice to produce brown rice. It removes the outer husk of the paddy rice, reducing grain breakage and surface damage, and preserving the brown rice as intact as possible.
[0003] Currently, Chinese patent CN112774763, published on April 5, 2022, discloses a rice huller with dual frequency conversion motors, including a machine body, a feeding hopper, a fixed rubber roller, a swinging rubber roller, a discharge port, an extraction pipe, and an air inlet. A first motor is installed at the bottom of the machine body and below the fixed rubber roller. Fixed pulleys are installed on one end of the fixed rubber roller and on the output shaft of the first motor. A fixed belt connects the two fixed pulleys. A drive cylinder is installed on the machine body at both ends of the swinging rubber roller. Swinging arms are installed at both ends of the swinging rubber roller. The cylinder body of the drive cylinder is connected to the machine body, and the end of the piston rod is hinged to the end of the swinging arm. A second motor is installed at the bottom of the machine body and below the swinging rubber roller. Swinging pulleys are installed on one end of the swinging rubber roller and on the output shaft of the second motor. A swinging belt connects the two swinging pulleys.
[0004] This type of rice huller with dual frequency conversion motors uses two frequency conversion motors to drive a fixed rubber roller and a swinging rubber roller to rotate via belts. However, the magnetic flux intensity of the frequency conversion motors is low when running at low speeds, resulting in unstable torque output. This increases the difficulty of control. At the same time, when the frequency conversion motors run at low speeds, the unstable mechanical movement of the motors leads to increased energy consumption, requiring more electrical energy to overcome the resistance of mechanical movement. Ultimately, this means that the rice huller needs to consume more electrical energy when running at low speeds, which is not conducive to energy conservation and environmental protection. Utility Model Content
[0005] The purpose of this invention is to provide a rice huller driven by a permanent magnet motor, which helps to save energy through direct drive by the permanent magnet motor.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a permanent magnet motor driven rice huller, comprising a rice huller body, a control console disposed on the side of the body, a fixed rubber roller rotatably connected to the body, a movable rubber roller located on one side of the fixed rubber roller, a swing arm with one end hinged to the body and the other end rotatably connected to the end of the movable rubber roller, and a swing cylinder with one end hinged to the body and the other end hinged to the swing arm. A mounting platform is disposed on the body and on one side of the fixed and movable rubber rollers, and an output shaft and the fixed rubber roller are fixed on the mounting platform. A first permanent magnet motor is connected to the end. A second permanent magnet motor is fixed on the mounting platform and located on one side of the first permanent magnet motor. The end of the second permanent magnet motor is provided with a driving pulley. The end of the movable rubber roller is provided with a driven pulley. A transmission belt is provided between the driving pulley and the driven pulley. A protective shell is provided on the side of the machine body to wrap around the swing arm, the driving pulley, the driven pulley and the transmission belt. An inspection door is also provided on the side of the protective shell near the control console. Two axial flow fans for cooling the transmission belt are installed on the inner wall of the inspection door.
[0007] A further feature of this invention is that when the inspection door is opened, two axial flow fans on the inner wall of the inspection door provide airflow toward the control panel.
[0008] A further feature of this invention is that: a bushing is provided in the middle of the inspection door, a rotating shaft is provided on the inspection door that passes through the bushing, a knob is provided at one end of the rotating shaft, and a locking arm for locking onto the inner wall of the casing is provided at the end of the rotating shaft away from the knob.
[0009] A further feature of this invention is that a reset torsion spring is sleeved on the rotating shaft, with one end connected to the locking arm and the other end connected to the end of the bushing.
[0010] A further feature of this invention is that the swing arm extends upward at an angle away from the axial flow fan, an exhaust port is provided on the upper side of the casing and at the upper end of the swing arm, and a guide shroud is provided on the upper surface of the casing to guide the airflow in the exhaust port to the side of the first permanent magnet motor and the second permanent magnet motor.
[0011] A further feature of this invention is that: a movable arm with one end hinged to the side wall of the machine body is provided inside the enclosure, and a tensioning wheel that abuts against the transmission belt is provided at the end of the movable arm; and a tensioning cylinder with one end hinged to the machine body and the other end hinged to the movable arm is also provided inside the enclosure.
[0012] In summary, this utility model has the following beneficial effects:
[0013] 1. The fixed rubber roller inside the machine body is directly driven by the first permanent magnet motor, while the movable rubber roller is driven by the second permanent magnet motor through the driving pulley, the driven pulley and the transmission belt. Since the permanent magnet motor uses permanent magnets to generate a magnetic field, the energy loss of electrical energy converted into magnetic field is reduced. Therefore, under the same conditions, the permanent magnet motor is more efficient and consumes less energy.
[0014] When the drive belt is in operation, two axial flow fans on the inner wall of the access door blow air to cool the space inside the enclosure, thereby reducing the surface temperature of the drive belt during operation and improving its durability. At the same time, since the access door is located near the control panel, when operators operate the control panel in hot weather, opening the access door allows the airflow from the axial flow fans to be directed at the operators, ultimately helping to cool them down and achieving efficient use of the axial flow fans.
[0015] 2. When the control panel is covered with dust, the axial flow fan can be used to blow air through the control panel by opening the access door, which will help clean the dust on the surface of the control panel.
[0016] 3. When it is necessary to open the access door, simply rotate the knob to rotate the locking arm, thereby disengaging the locking arm from the inner wall of the enclosure, and finally, the access door can be opened quickly.
[0017] 4. One end of the return torsion spring is connected to the locking arm and the other end is connected to the end of the bushing. The elastic restoring force of the return torsion spring can ensure that the locking arm can be stably locked on the inner wall of the casing, which is conducive to the stable closing of the maintenance door. When it is necessary to open the maintenance door, the locking arm can be rotated by rotating the knob, and the return torsion spring will undergo elastic deformation, thereby opening the maintenance door.
[0018] 5. Since the swing arm extends upward at an angle away from the axial flow fan inside the enclosure, the swing arm can guide the airflow blown by the axial flow fan, so that the airflow flows upward along the swing arm and is discharged from the exhaust port. At the same time, the airflow discharged from the exhaust port can be guided to the side of the first permanent magnet motor and the second permanent magnet motor by the airflow discharged from the exhaust port, thereby realizing the heat dissipation of the surface of the first permanent magnet motor and the second permanent magnet motor by the airflow discharged from the exhaust port.
[0019] 6. When the drive belt is in motion, the tensioning cylinder drives the movable arm to swing, which in turn drives the tensioning wheel to press against the drive belt, thereby achieving the tensioning of the drive belt. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a magnified view of a portion of the structure of this utility model after omitting the outer casing;
[0023] Figure 3 This is a structural schematic diagram of the inner wall position of the inspection door in this utility model;
[0024] Figure 4 yes Figure 3 Enlarged view of part A in the middle.
[0025] In the diagram, 1. Machine body; 11. Control console; 12. Fixed rubber roller; 13. Movable rubber roller; 131. Driven pulley; 14. Swing arm; 15. Swing cylinder; 2. Mounting platform; 21. First permanent magnet motor; 22. Second permanent magnet motor; 221. Drive pulley; 222. Transmission belt; 3. Enclosure shell; 31. Inspection door; 311. Bushing; 312. Rotating shaft; 3121. Return torsion spring; 313. Knob; 314. Locking arm; 32. Axial flow fan; 33. Exhaust vent; 34. Flow guide; 4. Movable arm; 41. Tensioning wheel; 42. Tensioning cylinder. Detailed Implementation
[0026] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0027] A rice huller driven by a permanent magnet motor, as described in the following article Figure 1 , Figure 2This type of permanent magnet motor driven rice huller includes a rice huller body 1, a control console 11, a fixed rubber roller 12, a movable rubber roller 13, a swing arm 14, and a swing cylinder 15. The control console 11 is located on the side of the body 1, and the operator controls the operation of the rice huller through the control console 11. Meanwhile, the fixed rubber roller 12 is rotatably connected to the body 1 through a bearing, while the movable rubber roller 13 is located on one side of the fixed rubber roller 12. The swing arm 14 is hinged to the body 1 at one end, and the other end is rotatably connected to the end of the movable rubber roller 13 through a bearing. The swing cylinder 15 is hinged to the body 1 at one end and to the swing arm 14 at the other end.
[0028] Reference Figure 1 , Figure 2 A mounting platform 2 is provided on the machine body 1 and located on one side of the fixed rubber roller 12 and the movable rubber roller 13. A first permanent magnet motor 21 with an output shaft connected to the end of the fixed rubber roller 12 via a coupling is fixed on the mounting platform 2 by bolts. A second permanent magnet motor 22 located on one side of the first permanent magnet motor 21 is also fixed on the mounting platform 2 by bolts. The end of the second permanent magnet motor 22 is keyed to a drive pulley 221, and the end of the movable rubber roller 13 is keyed to a driven pulley 131. A transmission belt 222 is provided between the drive pulley 221 and the driven pulley 131. A movable arm 4 with one end hinged to the side wall of the machine body 1 is also provided on the side wall of the machine body 1. The end of the movable arm 4 is rotatably connected to a tensioning wheel 41 that abuts against the transmission belt 222 via a bearing. A tensioning cylinder 42 with one end hinged to the machine body 1 and the other end hinged to the movable arm 4 is also provided on the side wall of the machine body 1.
[0029] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4A casing 3, bolted to the side of the machine body 1, covers the movable arm 4, swing arm 14, drive pulley 221, driven pulley 131, and drive belt 222. A maintenance door 31 is hinged to the side of the casing 3 closest to the control console 11. Two axial flow fans 32, bolted to the inner wall of the maintenance door 31, are used to dissipate heat from the drive belt 222. When the maintenance door 31 is opened, the two axial flow fans 32 on the inner wall of the maintenance door 31 provide airflow towards the control console 11. A bushing 311 is integrally formed in the middle of the maintenance door 31, and a rotating shaft 312 passes through the bushing 311 on the maintenance door 31. Meanwhile, a knob 313 is welded to one end of the rotating shaft 312, and a locking arm 314 for locking onto the inner wall of the casing 3 is welded to the other end of the rotating shaft away from the knob 313. A return torsion spring 3121 is sleeved on the rotating shaft 312, with one end welded to the locking arm 314 and the other end welded to the end of the bushing 311. Meanwhile, the swing arm 14 extends upward at an angle away from the axial flow fan 32, and an exhaust port 33 is opened on the upper side of the casing 3 and at the upper end of the swing arm 14. A guide shroud 34 for guiding the airflow in the exhaust port 33 to the side of the first permanent magnet motor 21 and the second permanent magnet motor 22 is fixed on the upper surface of the casing 3 by bolts.
[0030] Principle: The fixed rubber roller 12 inside the machine body 1 is directly driven by the first permanent magnet motor 21, while the movable rubber roller 13 is driven by the second permanent magnet motor 22 through the driving pulley 221, the driven pulley 131 and the transmission belt 222. Since the permanent magnet motor uses permanent magnets to generate a magnetic field, the energy loss of converting electrical energy into magnetic field is reduced. Therefore, under the same conditions, the permanent magnet motor is more efficient and consumes less energy.
[0031] When the drive belt 222 is in operation, the two axial flow fans 32 on the inner wall of the inspection door 31 can blow air to cool the space inside the enclosure 3, thereby reducing the surface temperature of the drive belt 222 during operation and improving its durability. At the same time, since the inspection door 31 is located on the side near the control panel 11, when the operator operates the control panel 11 in hot weather, the operator can quickly open the inspection door 31 by rotating the knob 313, so that the airflow from the axial flow fans 32 can be blown onto the operator, which can help cool the operator and achieve efficient use of the axial flow fans 32.
Claims
1. A permanent magnet motor driven rice huller, comprising a rice huller body (1), a control console (11) disposed on the side of the body (1), a fixed rubber roller (12) rotatably connected inside the body (1), a movable rubber roller (13) located on one side of the fixed rubber roller (12), a swing arm (14) with one end hinged to the body (1) and the other end rotatably connected to the end of the movable rubber roller (13), and a swing cylinder (15) with one end hinged to the body (1) and the other end hinged to the swing arm (14), characterized in that: A mounting platform (2) is provided on the machine body (1) and on one side of the fixed rubber roller (12) and the movable rubber roller (13). A first permanent magnet motor (21) with its output shaft connected to the end of the fixed rubber roller (12) is fixed on the mounting platform (2). A second permanent magnet motor (22) located on one side of the first permanent magnet motor (21) is fixed on the mounting platform (2). A drive pulley (221) is provided at the end of the second permanent magnet motor (22), and a driven pulley (131) is provided at the end of the movable rubber roller (13). A transmission belt (222) is provided between the driving pulley (221) and the driven pulley (131). A protective shell (3) is provided on the side of the machine body (1) to wrap around the swing arm (14), the driving pulley (221), the driven pulley (131) and the transmission belt (222). A maintenance door (31) is also provided on the side of the protective shell (3) near the control console (11). Two axial flow fans (32) for cooling the transmission belt (222) are installed on the inner wall of the maintenance door (31).
2. A permanent magnet motor driven rice huller according to claim 1, characterized in that: When the inspection door (31) is opened, two axial flow fans (32) on the inner wall of the inspection door (31) provide airflow toward the control panel (11).
3. A permanent magnet motor driven rice huller according to claim 1, characterized in that: A bushing (311) is provided in the middle of the inspection door (31), and a rotating shaft (312) passing through the bushing (311) is provided on the inspection door (31). A knob (313) is provided at one end of the rotating shaft (312), and a locking arm (314) for locking onto the inner wall of the casing (3) is provided at the end of the rotating shaft (312) away from the knob (313).
4. A permanent magnet motor driven rice huller according to claim 3, characterized in that: A reset torsion spring (3121) is sleeved on the rotating shaft (312), with one end connected to the locking arm (314) and the other end connected to the end of the bushing (311).
5. A permanent magnet motor driven rice huller according to claim 1, characterized in that: The swing arm (14) extends upward at an angle away from the axial flow fan (32). An exhaust port (33) is provided on the upper side of the enclosure (3) at the upper end of the swing arm (14). A guide shroud (34) is provided on the upper surface of the enclosure (3) to guide the airflow in the exhaust port (33) to the side of the first permanent magnet motor (21) and the second permanent magnet motor (22).
6. A permanent magnet motor driven rice huller according to claim 1, characterized in that: The enclosing shell (3) is also provided with a movable arm (4) with one end hinged to the side wall of the machine body (1). The end of the movable arm (4) is provided with a tensioning wheel (41) that abuts against the transmission belt (222). The enclosing shell (3) is also provided with a tensioning cylinder (42) with one end hinged to the machine body (1) and the other end hinged to the movable arm (4).