Automatic weeding mechanism between crop plants

Abstract

The automatic weeding mechanism between crop plants belongs to agricultural machinery; a sun gear is fixed on a power input shaft, a friction ring with a driving shaft is arranged on the upper outer side of the sun gear, a planetary gear, a bevel gear A and a hanging frame are installed on the driving shaft, an intermediate shaft and a driven shaft are installed on the hanging frame, bevel gears B and C are fixed on the intermediate shaft, a bevel gear D and a cutter disc are fixed on the driven shaft, a weeding knife is fixed on the cutter disc, an inner gear ring is set on the outside of the planetary gear, a stepper motor equipped with a connecting plate and a Π-shaped friction frame is arranged above the friction ring and the inner gear ring, a cover shell for installing an ultrasonic sensor covers the sun gear, the friction ring and the inner gear ring, and a wire connects the automatic controller with the ultrasonic sensor and the stepper motor respectively; the structure of the mechanism is novel, unique and reasonable, and the mechanical weeding between plants is efficient and of good quality, with a low seedling injury rate and a high degree of automation.

Description

Technical Field

[0001] The invention belongs to agricultural machinery, and mainly relates to a mechanical weeding mechanism. Background Art

[0002] In recent years, with the development of green organic agriculture in my country, the use of chemical herbicides has been reduced year by year, and mechanical weeding machines without pollution and drug residue have become indispensable weeding tools. However, due to the shortcomings in structural design, when the existing weeding machines are weeding between plants, their operating parts not only remove the weeds between plants, but also cause irregular mechanical scratches and damage to the seedlings, and even dig their roots out of the soil, causing the death of the seedlings. The seedling injury rate is relatively high, and the promotion and application of mechanical weeding machines are limited. Summary of the invention

[0003] The purpose of the present invention is to design an automatic weeding mechanism between crop plants in response to the problems existing in the above-mentioned prior art, in combination with the actual needs of mechanical weeding operations, so as to achieve the goals of high degree of automation, low seedling injury rate and good weeding effect between crops.

[0004] The purpose of the invention is achieved as follows: a sun gear is fixed on a positioned power input shaft, a friction ring is rotatably mounted on the outer portion of the upper side of the sun gear, a driving shaft is rotatably mounted on the friction ring, a planetary gear and a bevel gear A are respectively fixed on the upper side and lower end of the driving shaft, a hanging bracket is relatively rotatably mounted on the middle portion of the driving shaft, an intermediate shaft and a driven shaft are rotatably inserted on the middle portion and the end portion of the hanging bracket, bevel gears B and C are respectively fixed on the inner and outer ends of the intermediate shaft, bevel gears D and a cutter disc are respectively fixed on the upper and lower ends of the driven shaft, a weeding blade is fixed on the cutter disc, and the planetary gears are meshed with the sun gear. The bevel gear A is meshed with the bevel gear B, and the bevel gear C is meshed with the bevel gear D; an inner gear ring meshing with the planetary gear is mounted on the outside of the planetary gear; a stepper motor is fixedly arranged above the friction ring and the inner gear ring, a connecting plate is fixedly mounted on the motor shaft of the stepper motor, and a Π-shaped friction frame is fixedly mounted on the lower end of the connecting plate, and the inner and outer lower end surfaces of the Π-shaped friction frame are respectively in a downward pressure contact fit or out of contact fit with the upper ends of the friction ring and the inner gear ring; a cover shell is fixedly covered above the sun gear, the friction ring and the inner gear ring, and an ultrasonic sensor is mounted on the outside of the cover shell; wires connect the automatic controller with the ultrasonic sensor and the stepper motor respectively, thereby forming an automatic weeding mechanism between crop plants.

[0005] The invention adopts an ultrasonic sensor to identify the seedlings, and then utilizes a mechanical rotation control structure to make the weeding knife on the knife disc automatically bypass the seedlings and pass through adjacent seedlings, thereby completing the mechanical weeding operation between the plants. The invention has the characteristics of novel, unique and reasonable structure, good quality of mechanical weeding between plants, high efficiency, low seedling injury rate and high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the automatic weeding mechanism between crop plants;

[0007] Figure 2 yes Figure 1 Bottom view of

[0008] Figure 3 yes Figure 1 A top view of

[0009] Figure 4 yes Figure 1 Schematic diagram of the local structure.

[0010] Description of part numbers in the figure:

[0011] 1. Cover, 2. Ultrasonic sensor, 3. Wire, 4. Automatic controller, 5. Power input shaft, 6. Stepper motor, 7. Connecting plate, 8. Π-shaped friction frame, 9. Friction ring, 10. Internal gear ring, 11. Driving shaft, 12. Bevel gear A, 13. Bevel gear B, 14. Intermediate shaft, 15. Hanging bracket, 16. Planetary gear, 17. Sun gear, 18. Cutter disc, 19. Driven shaft, 20. Bevel gear D, 21. Weeding knife, 22. Bevel gear C, 23. Protective ring. DETAILED DESCRIPTION

[0012] The following is a detailed description of the implementation scheme of the invention in conjunction with the accompanying drawings. An automatic weeding mechanism between crop plants, wherein a sun gear 17 is fixedly mounted on a positioned power input shaft 5, a friction ring 9 is rotatably mounted on the upper outer portion of the sun gear 17, a driving shaft 11 is rotatably mounted on the friction ring 9, a planetary gear 16 and a bevel gear A12 are respectively fixedly mounted on the upper side and lower end of the driving shaft 11, a hanging bracket 15 is relatively rotatably mounted on the middle portion of the driving shaft 11, an intermediate shaft 14 and a driven shaft 19 are rotatably inserted on the middle portion and the end portion of the hanging bracket 15, a bevel gear B13 and a bevel gear C22 are respectively fixedly mounted on the inner and outer ends of the intermediate shaft 14, a bevel gear D20 and a cutter disc 18 are respectively fixedly mounted on the upper and lower ends of the driven shaft 19, a weeding blade 21 is fixedly mounted on the cutter disc 18, the planetary gear 16 and the bevel gear A12 are respectively fixedly mounted on the upper side and lower end of the driving shaft 11, a hanging bracket 15 is relatively rotatably mounted on the middle portion of the driving shaft 11, an intermediate shaft 14 and a driven shaft 19 are respectively rotatably inserted on the middle portion and the end portion of the hanging bracket 15, a bevel gear B13 and a bevel gear C22 are respectively fixedly mounted on the inner and outer ends of the intermediate shaft 14, a bevel gear D20 and a cutter disc 18 are respectively fixedly mounted on the upper and lower ends of the driven shaft 19, a weeding blade 21 is fixedly mounted on the cutter disc 18, the planetary gear 16 meshes with the sun gear 17, the bevel gear A12 meshes with the bevel gear B13, and the bevel gear C22 meshes with the bevel gear D20; the inner gear ring 10 meshing with the planetary gear 16 is mounted on the outside of the planetary gear 16; the stepper motor 6 is fixedly arranged at the upper part of the friction ring 9 and the inner gear ring 10, the connecting plate 7 is fixedly mounted on the motor shaft of the stepper motor 6, and the Π-shaped friction frame 8 is fixedly mounted on the lower end of the connecting plate 7, and the inner and outer lower end surfaces of the Π-shaped friction frame 8 are respectively pressed and contacted or disengaged with the upper ends of the friction ring 9 and the inner gear ring 10; the cover 1 is fixedly covered above the sun gear 17, the friction ring 9 and the inner gear ring 10, and the ultrasonic sensor 2 is installed on the outside of the cover 1; the wire 3 connects the automatic controller 4 with the ultrasonic sensor 2 and the stepper motor 6 respectively. A protective cover 23 is fixedly mounted on the end of the hanging frame 15, and the protective cover 23 is located outside the weeding knife 21 as a whole.

[0013] When used for weeding between rows, the rotating power input shaft 5 drives the sun gear 17 to rotate. When the inner lower end of the Π-shaped friction frame 8 is in downward pressure contact with the friction ring 9, the friction ring 9 is locked. At this time, the outer lower end of the Π-shaped friction frame 8 is out of downward pressure contact with the inner gear ring 10. Driven by the sun gear 17, the planetary gear 16 rotates, and drives the weeding knife 21 to rotate through the driving shaft 11, bevel gear A12, bevel gear B13, intermediate shaft 14, bevel gear C22, bevel gear D20, driven shaft 19, and knife disc 18 in sequence. When the ultrasonic sensor 2 detects the upright seedlings, the wire 3 transmits the electrical signal The power is input to the automatic controller 4, the stepper motor 6 is started, and the Π-shaped friction frame 8 is driven to rotate through the connecting plate 7. While the Π-shaped friction frame 8 is disengaged from the friction ring 9, the Π-shaped friction frame 8 is in contact with the inner gear ring 10 and locked. The planetary gear 16 revolves around the sun gear 17 while rotating. The weeding knife 21 is driven to rotate around the axis of the power input shaft 5 through the driving shaft 11, the hanging frame 15, and the knife disc 18 to avoid touching the seedlings and complete the weeding operation between the plants. Then the stepper motor 6 reverses, and the Π-shaped friction frame 8 returns to the initial position, and the process is repeated. The protective ring 23 can reduce and avoid the damage of the weeding knife 21 to the seedlings.

Claims

1. An automatic weeding mechanism between crop plants, characterized in that: A sun gear (17) is fixedly mounted on a power input shaft (5) with a positioning configuration, a friction ring (9) is rotatably mounted on the upper outer portion of the sun gear (17), a driving shaft (11) is rotatably mounted on the friction ring (9), a planetary gear (16) and a bevel gear A (12) are respectively fixedly mounted on the upper side and lower end of the driving shaft (11), a hanging frame (15) is relatively rotatably mounted on the middle portion of the driving shaft (11), an intermediate shaft (14) and a driven shaft (19) are rotatably inserted on the middle portion and the end portion of the hanging frame (15), a bevel gear B (13) and a bevel gear C (22) are respectively fixedly mounted on the inner and outer ends of the intermediate shaft (14), a bevel gear D (20) and a cutter disc (18) are respectively fixedly mounted on the upper and lower ends of the driven shaft (19), a weeding blade (21) is fixedly mounted on the cutter disc (18), the planetary gear (16) is meshed with the sun gear (17) The bevel gear A (12) meshes with the bevel gear B (13), and the bevel gear C (22) meshes with the bevel gear D (20); an inner gear ring (10) meshing with the planetary gear (16) is mounted on the outside of the planetary gear (16); a stepper motor (6) is fixedly arranged above the friction ring (9) and the inner gear ring (10); a connecting plate (7) is fixedly mounted on the motor shaft of the stepper motor (6); a Π-shaped friction frame (8) is fixedly mounted on the lower end of the connecting plate (7); the inner and outer lower end surfaces of the Π-shaped friction frame (8) are respectively in a downward pressure contact fit or a disengagement contact fit with the upper ends of the friction ring (9) and the inner gear ring (10); a cover (1) is fixedly covered above the sun gear (17), the friction ring (9) and the inner gear ring (10), and an ultrasonic sensor (2) is mounted on the outside of the cover (1); and a wire (3) connects the automatic controller (4) with the ultrasonic sensor (2) and the stepper motor (6) respectively.

2. The automatic weeding mechanism between crop plants according to claim 1, characterized in that: A protective cover (23) is fixedly mounted on the end of the hanging frame (15), and the protective cover (23) is entirely located outside the weeding blade (21).

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