Precise automatic control mechanism for sowing length

Abstract

The invention discloses a precise automatic control mechanism for sowing length, which belongs to agricultural machinery. A power transmission shaft with a follower pulley and a one-way ratchet is rotatably mounted on the upper side of a single frame assembly coaxially with a seeding drive shaft, a seeding power transmission disc with a pawl column is fixedly mounted on the end of the seeding drive shaft opposite to the power transmission shaft, the pawl and the torsion spring are sleeved on the pawl column, a two-way hydraulic cylinder and an anti-skid seeding drive wheel are mounted on the single frame assembly, a driving pulley is fixedly mounted on the anti-skid seeding drive wheel, a transmission belt is sleeved on the main and follower pulleys, a counting detection column is mounted on the outer end surface of the anti-skid seeding drive wheel, a counting sensor is mounted on the single frame assembly, and a wire connects the automatic controller with the counting sensor and the two-way hydraulic cylinder respectively. The mechanism realizes automatic and precise control of sowing length, is simple, convenient and fast to operate, saves seeds and reduces operating costs.

Description

Technical Field

[0001] The invention belongs to agricultural machinery and mainly relates to a sowing length automatic control mechanism. Background Art

[0002] When conducting performance testing of seed meters or sowing operations in experimental fields, breeding fields, and improved seed breeding fields, it is necessary to control the sowing length more accurately. However, the currently used seeding machines cannot achieve precise automatic control of the sowing length, which not only makes the performance testing of seed meters and sowing operations in experimental fields, breeding fields, and improved seed breeding fields labor-intensive and time-consuming, but also causes the loss and waste of improved seed, and increases the cost of testing and breeding. Summary of the invention

[0003] The purpose of the present invention is to design a precise automatic control mechanism for sowing length in response to the problems existing in the above-mentioned prior art, in combination with the actual needs of scientific research experiments, performance testing and breeding and sowing operations, so as to achieve the purpose of saving labor, effort and time in regulating the sowing length, achieving precise length, high degree of automation, strong applicability, saving seeds, and reducing testing and production costs.

[0004] The purpose of the invention is achieved in this way: a power transmission shaft is rotatably installed on the upper side of the single frame assembly coaxially with the seeding drive shaft of the seeding device, a follower pulley and a one-way ratchet are respectively fixed on the two end parts of the power transmission shaft, a seeding power transmission disk is fixed on the end part of the seeding drive shaft on the side opposite to the power transmission shaft, a pawl column is fixed on the seeding power transmission disk, the pawl is rotatably mounted on the pawl column, a torsion spring is mounted on the pawl column between the seeding power transmission disk and the one-way ratchet, the two ends of the torsion spring are respectively positioned and matched with the seeding power transmission disk and the pawl, and the pawl is contacted and locked with the one-way ratchet. In coordination, a two-way hydraulic cylinder is installed on a single frame assembly, and the cylinder rod of the two-way hydraulic cylinder is in contact or out of contact with a pawl. An anti-skid seeding drive wheel is rotatably installed on the middle lower side of the single frame assembly, and the active pulley is fixed on the anti-skid seeding drive wheel. The transmission belt is sleeved on the active pulley and the driven pulley. A counting detection column is installed on the outer end face of the anti-skid seeding drive wheel, and a counting sensor is installed on the upper rear side of the single frame assembly. The counting sensor cooperates with the counting detection column, and the wire connects the automatic controller with the counting sensor and the two-way hydraulic cylinder respectively, thereby forming a precise automatic control mechanism for the sowing length.

[0005] The invention inputs the required sowing length into the automatic controller before the sowing operation, and can automatically and accurately control the start and stop of the sowing device within the determined length during the sowing operation. It has the characteristics of reasonable structure, high degree of automation, precise control of sowing length, simple, convenient and fast operation, saving labor, effort and time, saving seeds and reducing operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the precise automatic control mechanism for sowing length;

[0007] Figure 2 It is a schematic diagram of the assembly structure of a bidirectional hydraulic cylinder, a one-way ratchet, a seeding power transmission plate, a pawl, a pawl column and a torsion spring;

[0008] Figure 3 yes Figure 2 Left view of .

[0009] Description of part numbers in the figure:

[0010] 1. Parallel four-bar frame, 2. Bidirectional hydraulic cylinder, 2-1. Cylinder rod, 3. Seeder, 3-1. Seeder drive shaft, 4. Torsion spring, 5. Seeder power transmission disc, 6. Seed guide tube, 7. Seed furrow opener, 8. Presser, 9. Soil cover, 10. Anti-skid seeding drive wheel, 11. Active pulley, 12. Counting detection column, 13. Counting sensor, 14. Automatic controller, 15. Monolithic frame assembly, 16. Transmission belt, 17. Follower pulley, 18. Power transmission shaft, 19. One-way ratchet, 20. Pawl, 21. Pawl column. DETAILED DESCRIPTION

[0011] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. A precise automatic control mechanism for sowing length comprises a single frame assembly 15, wherein the single frame assembly 15 is mounted on the rear side of a parallel four-bar frame 1, a seeding device 3 is mounted on the upper side of the single frame assembly 15, a seed furrow opener 7, a seed guide tube 6, a soil cover 9 and a pressure suppressor 8 are mounted on the lower side of the single frame assembly 15 in sequence from front to back, a power transmission shaft 18 is rotatably mounted coaxially with a seeding drive shaft 3-1 of the seeding device 3 on the upper side of the single frame assembly 15, a follower pulley 17 and a one-way ratchet 19 are respectively fixed on both ends of the power transmission shaft 18, a seeding power transmission disc 5 is fixed on the end of the seeding drive shaft 3-1 on the side opposite to the power transmission shaft 18, a ratchet column 21 is fixed on the seeding power transmission disc 5, a ratchet 20 is rotatably mounted on the ratchet column 21, and the ratchet column 21 is located between the seeding power transmission disc 5 and the one-way ratchet 19 A torsion spring 4 is set on the position, and the two ends of the torsion spring 4 are respectively positioned and matched with the seeding power transmission disk 5 and the pawl 20, and the pawl 20 is in contact and locked cooperation with the one-way ratchet 19. The bidirectional hydraulic cylinder 2 is installed on the single frame assembly 15, and the cylinder rod 2-1 of the bidirectional hydraulic cylinder 2 is in contact or out of contact with the pawl 20. The anti-skid seeding drive wheel 10 is rotatably installed on the middle lower side of the single frame assembly 15, the active pulley 11 is fixed on the anti-skid seeding drive wheel 10, and the transmission belt 16 is set on the active pulley 11 and the driven pulley 17. A counting detection column 12 is installed on the outer end face of the anti-skid seeding drive wheel 10, and a counting sensor 13 is equipped on the upper rear side of the single frame assembly 15. The counting sensor 13 cooperates with the counting detection column 12, and the wire connects the automatic controller 14 with the counting sensor 13 and the bidirectional hydraulic cylinder 2 respectively.

[0012] When in operation, the mechanism is installed on the seeding machine using the parallelogram frame 1, and the anti-skid seeding drive wheel 10 is in close contact with the soil surface, supporting the entire mechanism on the soil surface. After turning on the automatic controller 14 and inputting the sowing length value into the automatic controller 14, the seeding machine drives the mechanism to move forward. Under the action of soil resistance, the counting detection column 12 rotates with the anti-skid seeding drive wheel 10, and the counting sensor 13 transmits the electrical signal of the number of rotations of the counting detection column 2 to the automatic controller 14 for calculation and processing to determine the sowing length. At the same time, the rotational movement of the anti-skid seeding drive wheel 10 is driven in sequence by the main driving pulley 11, the transmission belt 16, the follower pulley 17, the power transmission shaft 18, the one-way ratchet 19, the pawl 20, the pawl column 21, and the seeding power transmission disk 5. The seeding drive shaft 3-1 of the seeding device 3 rotates, and the seeds discharged by the seeding device 3 are sown through the seed guide tube 6 into the seed furrow opened by the seed furrow opener 7. Then, the soil covering device 9 and the pressure device 8 respectively complete the seed furrow covering and seed furrow pressure operations. When the sowing length reaches the preset value, the electrical signal of the automatic controller 14 immediately starts the two-way hydraulic cylinder 2, so that its cylinder rod 2-1 extends, and pushes the pawl 20 to rotate around the pawl column 21 on the seeding power transmission disk 5, so that the pawl 20 is disengaged from the locking fit with the one-way ratchet 19, and the power transmission between the one-way ratchet 19 and the seeding power transmission disk 5 is cut off, and the sowing operation is stopped. The cylinder rod 2-1 retracts and disengages from the pushing contact with the pawl 20. Under the action of the torsion spring 4, the pawl 20 rotates in the opposite direction on the pawl column 21, so that the pawl 20 and the one-way ratchet 19 return to the locking contact.

Claims

1. A precise automatic control mechanism for sowing length, comprising a single frame assembly (15), wherein the single frame assembly (15) is mounted on the rear side of a parallel four-bar frame (1), a seed meter (3) is mounted on the upper side of the single frame assembly (15), and a seed furrow opener (7), a seed guide tube (6), a soil cover (9) and a pressure suppressor (8) are mounted on the lower side of the single frame assembly (15) in sequence from front to back, characterized in that: A power transmission shaft (18) is rotatably mounted on the upper side of the single frame assembly (15) coaxially with the seeding drive shaft (3-1) of the seeding device (3). A follower pulley (17) and a one-way ratchet (19) are respectively fixedly mounted on the two ends of the power transmission shaft (18). A seeding power transmission disk (5) is fixedly mounted on the end of the seeding drive shaft (3-1) opposite to the power transmission shaft (18). A pawl column (21) is fixedly mounted on the seeding power transmission disk (5). The pawl (20) is rotatably mounted on the pawl column (21). A torsion spring (4) is mounted on the pawl column (21) between the seeding power transmission disk (5) and the one-way ratchet (19). The two ends of the torsion spring (4) are respectively positioned and matched with the seeding power transmission disk (5) and the pawl (20). The pawl (20) and the one-way ratchet (19) are in a rotatable manner. The invention relates to a contact locking match, wherein a bidirectional hydraulic cylinder (2) is mounted on a single frame assembly (15), a cylinder rod (2-1) of the bidirectional hydraulic cylinder (2) is in contact with or out of contact with a ratchet (20), an anti-skid seeding drive wheel (10) is rotatably mounted on the middle lower side of the single frame assembly (15), a driving pulley (11) is fixedly mounted on the anti-skid seeding drive wheel (10), a transmission belt (16) is sleeved on the driving pulley (11) and the driven pulley (17), a counting detection column (12) is mounted on the outer end surface of the anti-skid seeding drive wheel (10), a counting sensor (13) is mounted on the upper rear side of the single frame assembly (15), the counting sensor (13) is matched with the counting detection column (12), and a wire connects an automatic controller (14) with the counting sensor (13) and the bidirectional hydraulic cylinder (2) respectively.

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