A tobacco leaf spiral picking mechanism and a tobacco leaf spiral picking device

Abstract

The application discloses a tobacco spiral picking mechanism and a tobacco spiral picking device, wherein the tobacco spiral picking mechanism comprises front spiral teeth and rear spiral teeth located in the middle; the front spiral teeth comprise a cylindrical front spiral tooth body and 2-6 front picking pieces in the shape of a cross and uniformly arranged longitudinally on the circumference of the front spiral tooth body; the outer surface of the front picking piece is in the shape of a wave; and the outer side end of the front spiral tooth body is provided with a front connecting rod; the rear spiral teeth comprise a cylindrical rear spiral tooth body and a rear picking rack spirally wound on the circumferential surface of the rear spiral tooth body; the outer surface of the rear picking rack is in the shape of a gear; and the outer side end of the rear spiral tooth body is provided with a rear connecting rod. The tobacco spiral picking mechanism can separate and pick the tobacco on the front and rear sides and the left and right sides step by step, has high picking efficiency and good picking effect, saves time and effort, and greatly reduces the labor intensity of tobacco growers.

Description

Technical Field

[0001] This invention relates to the field of tobacco leaf harvesting machinery technology, specifically to a tobacco leaf spiral harvesting mechanism and a tobacco leaf spiral harvesting device. Background Technology

[0002] Harvesting is a crucial step in tobacco production. In recent years, the number of tobacco producers has decreased significantly, making it difficult to guarantee timely harvesting. Delayed harvesting can easily lead to missing the optimal harvesting period, severely impacting tobacco quality. Currently, while some harvesting machinery is available, existing harvesting mechanisms need to harvest leaves simultaneously from all four directions (front, back, left, and right). However, the current structure is not well-suited for simultaneous harvesting in all four directions. This structural limitation often makes harvesting leaves in the front-back or left-right directions difficult, resulting in incomplete harvesting and requiring manual re-harvesting of missed leaves, thus reducing harvesting efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a tobacco leaf spiral harvesting mechanism and device that saves time and effort, reduces the labor intensity of tobacco growers, and can harvest tobacco leaves in all four directions (front, back, left, and right) of the tobacco plant.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A tobacco leaf spiral harvesting mechanism includes a front spiral tooth and a rear spiral tooth located in the middle. The front spiral tooth includes a cylindrical front spiral tooth body and 2-6 front harvesting pieces arranged longitudinally in a cross shape on the circumference of the front spiral tooth body. The outer surface of the front harvesting pieces is wavy. A front connecting rod is provided at the outer end of the front spiral tooth body. The rear spiral tooth includes a cylindrical rear spiral tooth body and a rear harvesting rack spirally wound around the circumferential surface of the rear spiral tooth body. The outer surface of the rear harvesting rack is gear-shaped. A rear connecting rod is provided at the outer end of the rear spiral tooth body.

[0006] To better achieve the above objectives, the present invention further provides the following technical solution:

[0007] The tooth spacing of the front picking blade is 4-8 cm; the helix angle of the rear picking rack is 15°-30°.

[0008] To better achieve the above objectives, the present invention further provides the following technical solution:

[0009] A tobacco spiral harvesting device including the above-mentioned tobacco spiral harvesting mechanism, comprising a frame beam, with a front support arm and a rear support arm provided at the front and rear ends of the frame beam, a rear chain drive box connected to the lower end of the rear support arm, a servo motor connected to the outside of the rear chain drive box via a reducer, a bearing seat support plate connected to the lower end of the front support arm, and uniformly arranged rollers connected between the rear chain drive box and the bearing seat support plate via a bearing seat.

[0010] The rear chain drive box is connected to a drive shaft via a chain, and the front end of the drive shaft is connected to the rear connecting rod of the tobacco leaf spiral harvesting mechanism via a universal coupling.

[0011] The front connecting rod of the tobacco spiral harvesting mechanism is connected to the front end of the frame beam via a suspension ball bearing, an L-shaped harvesting mechanism height adjustment rod, and an adjustment rod locking device.

[0012] The above technical solution may further include the following technical solutions:

[0013] A drive shaft support is provided above the rear chain drive box.

[0014] The above technical solution may further include the following technical solutions:

[0015] Above the drive shaft support is a baffle located above the tobacco leaf spiral harvesting mechanism via a baffle support rod. The lower front end of the baffle is connected to the height adjustment rod of the harvesting mechanism.

[0016] The above technical solution may further include the following technical solutions:

[0017] The adjusting rod locking device includes a U-shaped connecting plate sleeved on the outside of the frame crossbeam and the outside of the height adjusting rod of the picking mechanism, and fastening bolts are threaded onto the vertical side wall of the U-shaped connecting plate.

[0018] In summary, the advantages of this invention are as follows: The tobacco leaf spiral harvesting mechanism of this invention is symmetrically arranged on both sides of the tobacco plant to be harvested. The rotation of the front harvesting blade impacts the leaf bases of the tobacco leaves on both sides of the plant, causing the petioles of the leaves on both sides to separate from the plant, thus achieving harvesting of the tobacco leaves on both sides of the plant. The rear harvesting rack engages with the petioles of the leaves on both sides, applying a torsional force to the petioles of the leaves on both sides, causing the petioles of the leaves on both sides to separate from the plant, thus achieving harvesting of the tobacco leaves on both sides of the plant. The spiral tobacco harvesting device is symmetrically arranged on both sides of the tobacco plants to be harvested. First, the front harvesting blades harvest the tobacco leaves on the left and right sides, and then the rear harvesting racks harvest the tobacco leaves on the front and rear sides, completing the harvesting of tobacco leaves within a fixed height. After harvesting, the tobacco leaves fall onto the transverse conveying rollers, which transfer the tobacco leaves to the lifting system. The spiral tobacco harvesting mechanism and device of this invention separate and harvest the tobacco leaves on the front and rear sides and the tobacco leaves on the left and right sides in stages, which has high harvesting efficiency, saves time and labor, and greatly reduces the labor intensity of tobacco growers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the tobacco leaf spiral harvesting mechanism of Embodiment 1 of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the tobacco leaf spiral harvesting device according to Embodiment 2 of the present invention.

[0021] Attached image labels:

[0022] 1. Servo motor; 2. Gearbox; 3. Rear chain drive box; 4. Bearing housing; 5. Drive shaft; 6. Universal coupling; 7. Rear helical gear; 8. Drum; 9. Front helical gear; 10. Bearing housing support plate; 11. Front support arm; 12. Suspension ball bearing; 13. Baffle; 14. Height adjustment rod of harvesting mechanism; 15. Adjustment rod locking device; 16. Frame crossbeam; 17. Rear support arm; 18. Baffle support rod; 19. Drive shaft support seat; 20. Rear connecting rod; 21. Front connecting rod; 71. Rear helical gear body; 72. Rear harvesting rack; 91. Front helical gear body; 92. Front harvesting plate. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1:

[0025] like Figure 1As shown, Embodiment 1 of the present invention discloses a tobacco leaf spiral harvesting mechanism, comprising a front spiral tooth 9 and a rear spiral tooth 7 located in the middle. The front spiral tooth 9 includes a cylindrical front spiral tooth body 91 and four front harvesting plates 92 arranged longitudinally in a cross shape on the circumference of the front spiral tooth body 91. The outer surface of the front harvesting plates 92 is wavy, and a front connecting rod 21 is provided at the outer end of the front spiral tooth body 91. The rear spiral tooth 7 includes a cylindrical rear spiral tooth body 71 and a rear harvesting rack 72 spirally wound around the circumferential surface of the rear spiral tooth body 71. The outer surface of the rear harvesting rack 72 is gear-shaped, and a rear connecting rod 20 is provided at the outer end of the rear spiral tooth body 71. The tooth spacing of the front harvesting plates 92 is 5 cm; the helix angle of the rear harvesting rack is 20°.

[0026] Example 2:

[0027] like Figure 2 As shown, Embodiment 2 of the present invention discloses a tobacco spiral harvesting device including the tobacco spiral harvesting mechanism of Embodiment 1, wherein it includes a frame beam 16, a front support arm 11 and a rear support arm 17 are provided at the front and rear ends of the frame beam 16, the lower end of the rear support arm 17 is connected to a rear chain drive box 3, the outer side of the rear chain drive box 3 is connected to a servo motor 1 through a reducer 2, the lower end of the front support arm 11 is connected to a bearing seat support plate 10, and the rear chain drive box 3 and the bearing seat support plate 10 are connected by a bearing seat 4 with uniformly arranged rollers 8.

[0028] The rear chain drive box 3 is connected to the drive shaft 5 via a chain, and the front end of the drive shaft 5 is connected to the rear connecting rod 20 of the tobacco leaf spiral harvesting mechanism via a universal coupling 6.

[0029] The front connecting rod 21 of the tobacco spiral harvesting mechanism is connected to the front end of the frame beam 16 via a suspension ball bearing 12, an L-shaped harvesting mechanism height adjustment rod 14, and an adjustment rod locking device 15.

[0030] A drive shaft support seat 19 is provided above the rear chain drive box 3.

[0031] Above the drive shaft support 19, a baffle 13 located above the tobacco spiral harvesting mechanism is connected via a baffle support rod 18. The lower front end of the baffle 13 is connected to the harvesting mechanism height adjustment rod 14.

[0032] The adjusting rod locking device 15 includes a U-shaped connecting plate sleeved on the outside of the frame beam 16 and the outside of the height adjusting rod 14 of the picking mechanism, and fastening bolts are threaded on the vertical side wall of the U-shaped connecting plate.

[0033] Working principle:

[0034] The tobacco leaf spiral harvesting device of the present invention is symmetrically arranged on a tobacco harvesting machine. During tobacco leaf harvesting, the spiral harvesting device is positioned on both sides of the tobacco plant to be harvested. The rotational speed of the spiral harvesting device maintains a suitable fixed speed ratio with the traveling speed of the tobacco harvesting machine, avoiding disturbance to the tobacco plant by the front harvesting blade 92 and the rear harvesting rack 72. First, the rotation of the front harvesting blade 92 impacts the leaf bases of the tobacco leaves on both sides of the plant, causing the petioles of the leaves on both sides to separate from the plant, thus achieving the harvesting of the tobacco leaves on both sides of the plant. Then, the rear harvesting rack 72 engages with the petioles of the leaves on both sides, applying pressure to the petioles of the leaves on both sides. By applying torsional force, the petioles of the tobacco leaves on both the front and rear sides are separated from the tobacco plant, thus enabling the harvesting of tobacco leaves on both sides. This completes the harvesting of tobacco leaves in four directions (front, back, left, and right) within a fixed height, achieving the separation and step-by-step harvesting of tobacco leaves in these four directions. After harvesting, the tobacco leaves fall onto the transverse conveying roller 8, which transfers the tobacco leaves to the lifting system. The tobacco leaf spiral harvesting mechanism and device of this invention separate and harvest tobacco leaves on the front and rear sides and on the left and right sides in a step-by-step manner, overcoming the shortcomings of traditional harvesting mechanisms that have a single structure and cannot effectively harvest tobacco leaves in four directions. This results in high harvesting efficiency, saves time and labor, and greatly reduces the labor intensity of tobacco growers.

Claims

1. A tobacco leaf spiral harvesting mechanism, characterized in that, The device includes a front helical tooth and a rear helical tooth located in the middle. The front helical tooth includes a cylindrical front helical tooth body and 2-6 front picking pieces arranged longitudinally in a cross shape on the circumference of the front helical tooth body. The outer surface of the front picking pieces is wavy. A front connecting rod is provided at the outer end of the front helical tooth body. The rear helical tooth includes a cylindrical rear helical tooth body and a rear picking rack spirally wound around the circumferential surface of the rear helical tooth body. The outer surface of the rear picking rack is gear-shaped. A rear connecting rod is provided at the outer end of the rear helical tooth body. The tooth spacing of the front picking blade is 4-8cm; the helix angle of the rear picking rack is 15°-30°.

2. A tobacco spiral harvesting device comprising the tobacco spiral harvesting mechanism of claim 1, characterized in that, The machine includes a frame beam, with a front support arm and a rear support arm at the front and rear ends of the frame beam. The lower end of the rear support arm is connected to a rear chain drive box, and a servo motor is connected to the outside of the rear chain drive box via a reducer. The lower end of the front support arm is connected to a bearing seat support plate, and a uniformly arranged roller is connected between the rear chain drive box and the bearing seat support plate via a bearing seat. The rear chain drive box is connected to a drive shaft via a chain, and the front end of the drive shaft is connected to the rear connecting rod of the tobacco leaf spiral harvesting mechanism via a universal coupling. The front connecting rod of the tobacco spiral harvesting mechanism is connected to the front end of the frame beam via a suspension ball bearing, an L-shaped harvesting mechanism height adjustment rod, and an adjustment rod locking device.

3. The tobacco leaf spiral harvesting device according to claim 2, characterized in that, A drive shaft support is provided above the rear chain drive box.

4. The tobacco leaf spiral harvesting device according to claim 2 or 3, characterized in that, Above the drive shaft support is a baffle located above the tobacco leaf spiral harvesting mechanism via a baffle support rod. The lower front end of the baffle is connected to the height adjustment rod of the harvesting mechanism.

5. The tobacco leaf spiral harvesting device according to claim 2 or 3, characterized in that, The adjusting rod locking device includes a U-shaped connecting plate sleeved on the outside of the frame crossbeam and the outside of the height adjusting rod of the picking mechanism, and fastening bolts are threaded onto the vertical side wall of the U-shaped connecting plate.

6. The tobacco leaf spiral harvesting device according to claim 4, characterized in that, The adjusting rod locking device includes a U-shaped connecting plate sleeved on the outside of the frame crossbeam and the outside of the height adjusting rod of the picking mechanism, and fastening bolts are threaded onto the vertical side wall of the U-shaped connecting plate.

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