Lever type sowing depth adjustable hole sowing unit

Abstract

The lever-type hole sowing and seeding unit with adjustable sowing depth belongs to agricultural machinery; a sowing depth regulating block with a pin shaft and a lead screw with a hand wheel are installed on a rectangular cylinder-type unit frame, the lead screw is threadedly connected with the sowing depth regulating block, a lever with a strip through hole is inserted in the center hole of the sowing depth regulating block, the pin shaft is inserted in the strip through hole, a rigid seed guide tube with a duckbill hole opener installed at the bottom is inserted in the rectangular cylinder-type unit frame and fixed on the left end of the lever, a driving rod with a set pressure spring is inserted in the rectangular cylinder-type unit frame and hinged with the right end of the lever, a motor and a seeding device assembly with a seed box are installed on the rectangular cylinder-type unit frame, a driving pulley is fixed on the seeding shaft of the seeding device assembly, a linkage shaft with a driven pulley and an eccentric wheel is installed on the rectangular cylinder-type unit frame through a bracket, and a transmission belt is set on the main and driven pulleys; this unit realizes the sowing depth adjustment of hole sowing, with high adjustment accuracy, simple adjustment operation and strong applicability.

Description

Technical Field

[0001] The invention belongs to agricultural machinery, and mainly relates to a lever-type structure seeding unit with adjustable sowing depth for hole sowing. Background Art

[0002] Hole sowing is a sowing method with good agronomic performance for precision sowing. In this method, a duckbill hole opener is often inserted into the soil to complete the hole construction and seed input and sowing operations. The seed hole sowing depth cannot be adjusted or changed. However, in actual production operations, different crop varieties have different sowing depth requirements, and different soil conditions also have different and changed seed hole sowing depths. The existing structure of the hole sowing assembly cannot meet and realize the requirements of adjusting and changing the hole sowing depth under different seeds and different soil conditions. It has poor operational adaptability, single performance, and low utilization rate. Summary of the invention

[0003] The purpose of the present invention is to address the problems existing in the above-mentioned prior art, combine the different actual changing requirements of the sowing depth of hole sowing operations, and study and design a lever-type hole sowing and seed arrangement unit with adjustable sowing depth, so as to adapt to and meet the requirements of different hole sowing depths, make the adjustment operation simple, convenient and fast, have high adjustment accuracy, expand the performance of the machine and improve the utilization rate.

[0004] The purpose of the invention is achieved in this way: a sowing depth control block can be installed in a horizontal and transversely movable manner in a rectangular cylindrical single frame, a lead screw is installed on the rectangular cylindrical single frame for horizontal axial positioning and circumferential rotation, the lead screw and the sowing depth control block are inserted and threadedly connected, a lever with a strip through hole can be inserted and installed in the center hole of the sowing depth control block for horizontal and transverse movement, a pin shaft is fixedly inserted on the sowing depth control block, the strip through hole on the lever and the pin shaft can be horizontally and transversely movable and circumferentially rotatable in a sleeve-fitting manner, a rigid seed guide tube and a driving rod can be inserted and installed up and down on the left side of the lower wall and the right side of the upper wall of the rectangular cylindrical single frame respectively, the rigid seed guide tube is fixedly installed on the left end portion of the lever, the duckbill type hole opener is fixedly installed on the lower end portion of the rigid seed guide tube, the lower end portion of the driving rod is hingedly connected to the right end portion of the lever, a pressure spring is sleeved on the lower side of the driving rod, and the pressure spring The upper end of the spring is in contact with the upper wall of the rectangular cylinder-type monomer frame for positioning and cooperation, and the lower end of the pressure spring is axially positioned on the driving rod. A motor and a seed metering device assembly are fixedly installed on the upper end surface of the left side of the rectangular cylinder-type monomer frame, and a seed box is mounted on the upper part of the seed metering device assembly and is interconnected. The upper and lower ends of the telescopic hose are respectively connected with the seed discharge port of the seed discharge pipe assembly and the seed inlet of the seed guide pipe. The motor shaft of the motor is connected with the seed discharge shaft of the seed metering device assembly. A driving pulley is fixedly installed on the outer end portion of the seed discharge shaft, and a linkage shaft is rotatably supported and installed by a bracket on the upper end surface of the right part of the rectangular cylinder-type monomer frame. A driven pulley and an eccentric wheel are respectively fixedly installed on both ends of the linkage shaft, and a transmission belt is sleeved on the driving pulley and the driven pulley. The outer surface of the circumference of the eccentric wheel is in close extrusion contact with the upper end surface of the driving rod, and a hand wheel is fixedly installed on the outer end portion of the lead screw, thereby constituting a lever-type hole sowing and seed discharging monomer with adjustable sowing depth.

[0005] The invention adopts the method of adjusting and changing the lever fulcrum position to realize the change of the swing amplitude of the lever end, and then drives the duckbill type hole opener to be inserted into the soil layer at different depths through the rigid seed guide tube, so as to complete the stepless adjustment of the hole sowing depth. The invention has the characteristics of novel and unique structure, simple and convenient operation and fast operation for hole sowing depth adjustment, high adjustment accuracy, strong applicability, wide adaptability and high single unit utilization rate, and provides technical support and guarantee for hole sowing depth adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a lever-type hole-seeding and seed-laying unit with adjustable sowing depth;

[0007] Figure 2 yes Figure 1 Rear view 3D schematic.

[0008] Description of part numbers in the figure:

[0009] 1. Motor, 2. Seed-dispensing shaft, 3. Seed-dispensing device assembly, 4. Seed box, 5. Active pulley, 6. Transmission belt, 7. Eccentric wheel, 8. Driven pulley, 9. Linkage shaft, 10. Drive rod, 11. Bracket, 12. Pressure spring, 13. Lead screw, 14. Hand wheel, 15. Rectangular cylinder-type single frame, 16. Strip through hole, 17. Duckbill hole opener, 18. Sowing depth control block, 19. Rigid seed guide tube, 20. Pin, 21. Lever, 22. Telescopic hose. DETAILED DESCRIPTION

[0010] The following is a detailed description of the implementation scheme of the invention in conjunction with the accompanying drawings. A lever-type sowing depth adjustable hole sowing and seeding unit, comprising a seeding device assembly 3 and a duckbill-type hole opener 17, a sowing depth control block 18 is mounted in a rectangular cylindrical unit frame 15 so as to be horizontally and laterally movable, a lead screw 13 is mounted on the rectangular cylindrical unit frame 15 so as to be horizontally axially positioned and circumferentially rotatable, the lead screw 13 and the sowing depth control block 18 are inserted and threadedly connected, a lever 21 with a bar-shaped through hole 16 is installed in a horizontally and laterally movable plug-in installation in the center hole of the sowing depth control block 18, a pin 20 is fixed The bar-shaped through hole 16 on the lever 21 is fitted with the pin 20 so as to be horizontally movable and circumferentially rotatable. The rigid seed guide tube 19 and the drive rod 10 are respectively inserted and moved up and down on the left side of the lower wall and the right side of the upper wall of the rectangular cylindrical single frame 15. The rigid seed guide tube 19 is fixedly installed on the left end of the lever 21, and the duckbill hole opener 17 is fixedly installed on the lower end of the rigid seed guide tube 19. The lower end of the drive rod 10 is hingedly connected to the right end of the lever 21. The pressure The spring 12 is sleeved on the lower part of the driving rod 10, the upper end of the pressure spring 12 is in contact with the upper wall of the rectangular cylindrical monomer frame 15, and the lower end of the pressure spring 12 is axially positioned on the driving rod 10. The motor 1 and the seeding device assembly 3 are fixed on the upper end surface of the left side of the rectangular cylindrical monomer frame 15, and the seed box 4 is mounted on the upper part of the seeding device assembly 3 and is interconnected. The upper and lower ends of the telescopic hose 22 are respectively connected to the seeding port of the seeding device assembly 3 and the seeding port of the seed guide tube 19. The motor shaft of the motor 1 is connected to the seeding port of the seeding device assembly 3. The seeding shaft 2 of the seeding device assembly 3 is connected, and a driving pulley 5 is installed on the outer end of the seeding shaft 2. A linkage shaft 9 is rotatably supported and installed through a bracket 11 on the upper end surface of the right part of the rectangular cylindrical single frame 15. A driven pulley 8 and an eccentric wheel 7 are respectively fixed on the two ends of the linkage shaft 9. The transmission belt 6 is sleeved on the driving pulley 5 and the driven pulley 8. The outer surface of the circumference of the eccentric wheel 7 is in close extrusion contact with the upper end surface of the driving rod 10, and a hand wheel 14 is fixed on the outer end of the screw 13.

[0011] When in operation, start the motor 1, the seeding shaft 2 and the active pulley 5 rotate, the seeding shaft 2 discharges the seeds that enter the seeding device assembly 3 from the seed box 4, and puts them into the closed duckbill hole opener 17 through the telescopic hose 22 and the seed guide tube 19. At the same time, the active pulley 5 drives the eccentric wheel 7 to rotate through the transmission belt 6, the driven pulley 8, and the linkage shaft 9 in turn. Under the control of the eccentric wheel 7 and the pressure spring 12, the driving rod 10 that moves back and forth up and down pushes the lever 21 to swing up and down around the pin 20 on the sowing depth control block 18. The rigid seed guide tube 19 is used to drive the duckbill hole opener 17 to be inserted into the soil of the seed bed and opened to complete the seeding operation, and then it rises back to its original position and closes, and it is repeated in sequence. When it is necessary to adjust the sowing depth, the hand wheel 14 is turned by hand to drive the lead screw 13 to rotate in situ on the rectangular cylindrical single frame 15, the sowing depth control block 18 is pulled and the pin shaft 20 is driven to move horizontally in the rectangular cylindrical single frame 15, and the fulcrum matching position of the pin shaft 20 and the strip through hole 16 on the lever 21 is adjusted to adjust the up and down swing size of the end of the lever 21, and then the depth of the duckbill hole opener 17 inserted into the soil layer is changed by the rigid seed guide tube 19 to complete the stepless adjustment of the sowing depth.

Claims

1. A lever-type hole-seeding unit with adjustable sowing depth, comprising a seed-seeding device assembly (3) and a duckbill hole-opening device (17), characterized in that A sowing depth control block (18) is installed in a rectangular cylindrical single body frame (15) so as to be horizontally and laterally movable, a lead screw (13) is installed on the rectangular cylindrical single body frame (15) so as to be horizontally axially positioned and circumferentially rotatable, the lead screw (13) and the sowing depth control block (18) are inserted and threadedly connected, a lever (21) with a strip-shaped through hole (16) is installed in a central hole of the sowing depth control block (18) so as to be horizontally and laterally movable, a pin shaft (20) is fixedly installed on the sowing depth control block (18), and the strip-shaped through hole (16) on the lever (21) is inserted and threadedly connected to the central hole of the sowing depth control block (18). The rigid seed guide tube (19) and the driving rod (10) are respectively inserted and movably mounted on the left side of the lower wall and the right side of the upper wall of the rectangular cylindrical single frame (15) so as to be horizontally movable and circumferentially rotatable. The rigid seed guide tube (19) and the driving rod (10) are respectively movably mounted on the left end of the lever (21). The duckbill-type hole opener (17) is fixed on the lower end of the rigid seed guide tube (19). The lower end of the driving rod (10) is hingedly connected to the right end of the lever (21). The pressure spring (12) is mounted on the lower side of the driving rod (10). The upper end of the spring (12) contacts and positions the upper wall of the rectangular cylindrical single frame (15), and the lower end of the pressure spring (12) is axially positioned on the driving rod (10). The motor (1) and the seed metering device assembly (3) are fixedly mounted on the upper end surface of the left side of the rectangular cylindrical single frame (15). The seed box (4) is mounted on the upper part of the seed metering device assembly (3) and is interconnected. The upper and lower ends of the telescopic hose (22) are respectively connected to the seeding port of the seed metering device assembly (3) and the seed inlet of the seed guide tube (19). The motor shaft of the motor (1) is connected to the seeding shaft (2) of the seed metering device assembly (3). A driving pulley (5) is fixedly mounted on the outer end of the seeding shaft (2); a linkage shaft (9) is rotatably supported and mounted on the upper end surface of the right part of the rectangular cylindrical single frame (15) via a bracket (11); a driven pulley (8) and an eccentric wheel (7) are respectively fixedly mounted on the two ends of the linkage shaft (9); a transmission belt (6) is sleeved on the driving pulley (5) and the driven pulley (8); the circumferential outer surface of the eccentric wheel (7) is in close extrusion contact with the upper end surface of the driving rod (10); and a hand wheel (14) is fixedly mounted on the outer end of the lead screw (13).

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