A pulse airflow generator for jujube harvesting

Abstract

This invention discloses a pulsed airflow generating device for jujube harvesting, relating to the field of harvesting machinery technology. It includes a support frame and an airflow pulse generator mounted on the support frame. The airflow pulse generator includes an air source, an air pipe, a power source, a reciprocating telescopic mechanism, a transmission mechanism, and a mechanical oscillating pulse generating mechanism. The mechanical oscillating pulse generating mechanism includes an outer frame and a disturbance plate. An airflow channel is provided within the outer frame. The air source is connected to the inlet end of the air pipe, and the outlet end of the air pipe is connected to the inlet end of the airflow channel. The disturbance plate is disposed within the airflow channel, and a rotating shaft is fixedly connected to one end of the disturbance plate. The rotating shaft is rotatably connected within the outer frame of the pulse generating mechanism and is connected to the reciprocating telescopic mechanism via the transmission mechanism. The power source is connected to the reciprocating telescopic mechanism, used to drive the disturbance plate to oscillate through the reciprocating telescopic mechanism and the transmission mechanism. This invention is simple to operate, improves harvesting efficiency, and ensures harvesting quality.

Description

Technical Field

[0001] This invention relates to the field of harvesting machinery technology, and in particular to a pulse airflow generator for jujube harvesting. Background Technology

[0002] Currently, the main mechanical harvesting methods for jujubes in my country are small handheld vibratory harvesters and large canopy-vibrating and trunk-shaking harvesters. Both methods involve direct contact between the machine's harvesting components and the fruit tree to apply vibration, effectively separating the fruit from the tree. However, this contact-based vibratory harvesting can easily cause mechanical damage to the branches and fruit, reducing fruit quality and seriously affecting the economic benefits of the harvest. To further extend the jujube industry chain, increase product added value, and enhance market competitiveness, fruit farmers and orchard owners urgently need a simple-to-operate, highly efficient, and quality-assured jujube harvesting machine. Summary of the Invention

[0003] The purpose of this invention is to provide a pulsed airflow generator for jujube harvesting, which solves the problems existing in the prior art. It is simple to operate, can improve harvesting efficiency, and ensure harvesting quality.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] This invention provides a jujube harvesting pulse airflow generating device, including a support frame and an airflow pulse generator mounted on the support frame. The airflow pulse generator includes an air source, an air pipe, a power source, a reciprocating telescopic mechanism, a transmission mechanism, and a mechanical oscillating pulse generating mechanism. The mechanical oscillating pulse generating mechanism includes an outer frame and a disturbance plate. An airflow channel is provided within the outer frame. The air source is connected to the inlet end of the air pipe, and the outlet end of the air pipe is connected to the inlet end of the airflow channel. The disturbance plate is disposed within the airflow channel, and a rotating shaft is fixedly connected to one end of the disturbance plate. The rotating shaft is rotatably connected within the outer frame of the pulse generating mechanism. The rotating shaft is connected to the reciprocating telescopic mechanism via the transmission mechanism. The power source is connected to the reciprocating telescopic mechanism and is used to drive the disturbance plate to oscillate through the reciprocating telescopic mechanism and the transmission mechanism.

[0006] Preferably, the reciprocating telescopic mechanism includes a crank disc, a connecting rod, a linear bearing, a reciprocating rod, and a spherical bearing. The output shaft of the power source is fixedly connected to the center of the crank disc. An eccentric hole is fixedly provided on the crank disc. One end of the connecting rod is provided with a first bearing hole, and the other end is provided with a fork arm. A first bearing is installed in the first bearing hole, and a bolt passes through the inner hole of the first bearing and is threaded into the eccentric hole. One end of the reciprocating rod is provided with a second bearing hole, and the other end is connected to the spherical bearing. A second bearing is installed in the second bearing hole. A pin passes through the through hole on the fork arm and the inner hole of the second bearing to connect the fork arm to the connecting rod. The reciprocating rod is slidably disposed on the linear bearing, and the linear bearing is fixed on the mounting bracket. The reciprocating rod is connected to the transmission mechanism through the spherical bearing.

[0007] Preferably, the crank disc is provided with a plurality of eccentric holes, and the connecting rod is connected to any one of the eccentric holes by the bolt and the first bearing.

[0008] Preferably, the transmission mechanism includes a rack, a gear, and a rack mounting base. The rack is slidably disposed on the rack mounting base, one end of the rack is hinged to the reciprocating rod, and the gear is fixed on the rotating shaft and meshes with the rack.

[0009] Preferably, the air pipe adopts a Laval nozzle structure.

[0010] Preferably, the air source is a ducted fan.

[0011] Preferably, a plurality of disturbance plates are provided at equal intervals along the height direction in the airflow channel, and three air pipes are provided at the air inlet end of the airflow channel along the height direction, with each air pipe's air inlet end connected to an air source.

[0012] Preferably, the air inlet of the air source and the air outlet of the air pipe are both circular, and their axes are on the same straight line.

[0013] Preferably, the disturbance piece has a streamlined structure and an up-and-down swing angle of ±35°.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] The jujube harvesting pulse airflow generating device provided by the present invention harvests jujubes through pulse airflow, and has the characteristics of simple structure, reliable operation, high harvesting efficiency, and no mechanical damage to fruit trees. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the jujube harvesting pulse airflow generating device in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the airflow pulse generator in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the connection structure between the reciprocating telescopic mechanism and the power source in an embodiment of the present invention.

[0020] In the diagram: 1-Bracket, 2-Airflow pulse generator, 3-Air source, 4-Air pipe, 5-Power source, 6-Reciprocating telescopic mechanism, 7-Transmission mechanism, 8-Mechanical swing pulse generator, 9-Pulse generator outer frame, 10-Disturbance plate, 11-Airflow channel, 12-Rotating shaft, 13-Crank disc, 14-Connecting rod, 15-Linear bearing, 16-Reciprocating rod, 17-Fork arm, 18-Mounting bracket, 19-Eccentric hole, 20-Rack, 21-Gear, 22-Rack fixing seat, 23-Spherical bearing. Detailed Implementation

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a pulsed airflow generator for jujube harvesting, which solves the problems existing in the prior art, is simple to operate, can improve harvesting efficiency, and ensure harvesting quality.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-3As shown, this embodiment provides a jujube harvesting pulse airflow generating device, including a support 1 and an airflow pulse generator 2 disposed on the support 1. The airflow pulse generator 2 includes an air source 3, an air pipe 4, a power source 5, a reciprocating telescopic mechanism 6, a transmission mechanism 7, and a mechanical swing pulse generating mechanism 8. The mechanical swing pulse generating mechanism 8 includes an outer frame 9 and a disturbance plate 10. An airflow channel 11 is provided inside the outer frame 9. The air source 3 is connected to the air inlet end of the air pipe 4, and the air outlet end of the air pipe 4 is connected to the air inlet end of the airflow channel 11. The disturbance plate 10 is disposed inside the airflow channel 11. A rotating shaft 12 is fixedly connected to one end of the disturbance plate 10. The rotating shaft 12 is rotatably connected inside the outer frame 9 of the pulse generating mechanism. The rotating shaft 12 is connected to the reciprocating telescopic mechanism 6 through the transmission mechanism 7. The power source 5 is connected to the reciprocating telescopic mechanism 6 and is used to drive the disturbance plate 10 to swing through the reciprocating telescopic mechanism 6 and the transmission mechanism 7.

[0025] In use, the support 1 is fixed to the ground, with its height slightly greater than the height of the jujubes in the main fruiting area of ​​the jujube tree, so that the air outlet of the airflow channel 11 can be aligned with the jujube harvesting area. Powered by the power source 5, the reciprocating telescopic mechanism 6 and the transmission mechanism 7 drive the disturbance plate 10 to swing. The air source 3 inputs high-speed airflow into the airflow channel 11 through the air pipe 4. Under the action of the swinging disturbance plate 10, a pulsed airflow is formed, which blows the jujubes off the tree, achieving the harvesting effect. This device harvests jujubes using pulsed airflow, featuring simple structure, reliable operation, high harvesting efficiency, and no mechanical damage to the fruit trees.

[0026] In this embodiment, the reciprocating telescopic mechanism 6 includes a crank disc 13, a connecting rod 14, a linear bearing 15, a reciprocating rod 16, and a spherical bearing 23. The output shaft of the power source 5 is fixedly connected to the center of the crank disc 13. An eccentric hole 19 is fixedly provided on the crank disc 13. One end of the connecting rod 14 is provided with a first bearing hole, and the other end is provided with a fork arm 17. A first bearing is installed in the first bearing hole, and a bolt passes through the inner hole of the first bearing and is threaded into the eccentric hole 19. One end of the reciprocating rod 16 is provided with a second bearing hole, and the other end is connected to the spherical bearing 23. A second bearing is installed in the second bearing hole. A pin passes through the through hole on the fork arm 17 and the inner hole of the second bearing to connect the fork arm 17 to the connecting rod 14. The reciprocating rod 16 is slidably disposed on the linear bearing 15, and the linear bearing 15 is fixed on the mounting bracket 18. The reciprocating rod 16 is connected to the transmission mechanism 7 through the spherical bearing 23. The power source 5 drives the crank disk 13 to rotate, which in turn drives the reciprocating rod 16 to move back and forth via the connecting rod 14. The structure is simple, and the power source 5 can be a drive motor.

[0027] In this embodiment, the crank disc 13 is provided with multiple eccentric holes 19, and the connecting rod 14 is connected to any one of the eccentric holes 19 by bolts and a first bearing. By connecting the connecting rod 14 to the eccentric holes 19 at different positions, the stroke of the reciprocating telescopic mechanism 6 can be adjusted, thereby adjusting the swing angle of the disturbance plate 10.

[0028] In this embodiment, the transmission mechanism 7 includes a rack 20, a gear 21, and a rack mounting base 22. The rack 20 is slidably mounted on the rack mounting base, and one end of the rack 20 is hinged to the reciprocating rod 16. The gear 21 is fixed to the rotating shaft 12 and meshes with the rack 20. The reciprocating movement of the reciprocating rod 16 drives the rack 20 to reciprocate, thereby driving the gear 21 to rotate forward and backward. The forward and backward rotation of the gear 21 drives the disturbance plate 10 to swing through the rotating shaft 12.

[0029] In this embodiment, the air pipe 4 adopts a Laval nozzle structure to increase the airflow injection speed.

[0030] In this embodiment, the air source 3 is a ducted fan. Multiple disturbance plates 10 are evenly spaced along the height direction inside the airflow channel 11. Three air pipes 4 are provided along the height direction at the air inlet end of the airflow channel 11, and the air inlet end of each air pipe 4 is connected to an air source 3. High-speed ducted fans are selected, and each ducted fan operates independently.

[0031] In this embodiment, the air inlet of the air source 3 and the air outlet of the air pipe 4 are both circular and their axes are on the same straight line, which minimizes airflow loss.

[0032] In this embodiment, the disturbance piece 10 has a streamlined structure, designed to resemble an aircraft aileron, and its vertical swing angle is ±35°.

[0033] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A pulsed airflow generator for jujube harvesting, characterized in that: The device includes a support frame and an airflow pulse generator mounted on the support frame. The airflow pulse generator includes an air source, an air pipe, a power source, a reciprocating telescopic mechanism, a transmission mechanism, and a mechanical oscillating pulse generating mechanism. The mechanical oscillating pulse generating mechanism includes an outer frame and a disturbance plate. An airflow channel is provided inside the outer frame. The air source is connected to the inlet end of the air pipe, and the outlet end of the air pipe is connected to the inlet end of the airflow channel. The disturbance plate is disposed inside the airflow channel, and multiple disturbance plates are evenly spaced along the height direction inside the airflow channel. One end of the disturbance plate is fixedly connected to a rotating shaft, which is rotatably connected inside the outer frame of the pulse generating mechanism. The rotating shaft is connected to the reciprocating telescopic mechanism through the transmission mechanism, and the power source is connected to the reciprocating telescopic mechanism for driving the disturbance plate to oscillate through the reciprocating telescopic mechanism and the transmission mechanism. The reciprocating telescopic mechanism includes a crank disc, a connecting rod, a linear bearing, a reciprocating rod, and a spherical bearing. The output shaft of the power source is fixedly connected to the center of the crank disc. The crank disc has an eccentric hole. One end of the connecting rod has a first bearing hole, and the other end has a fork arm. A first bearing is installed in the first bearing hole, and a bolt passes through the inner hole of the first bearing and is threaded into the eccentric hole. One end of the reciprocating rod has a second bearing hole, and the other end is connected to the spherical bearing. A second bearing is installed in the second bearing hole. A pin passes through a through hole on the fork arm and the inner hole of the second bearing to connect the fork arm to the connecting rod. The reciprocating rod is slidably mounted on the linear bearing, and the linear bearing is fixed on the mounting bracket. The reciprocating rod is connected to the transmission mechanism through the spherical bearing. The crank disc is provided with a plurality of eccentric holes, and the connecting rod is connected to any one of the eccentric holes by the bolt and the first bearing.

2. The jujube harvesting pulse airflow generating device according to claim 1, characterized in that: The transmission mechanism includes a rack, a gear, and a rack mounting base. The rack is slidably mounted on the rack mounting base, and one end of the rack is hinged to the reciprocating rod. The gear is fixed to the rotating shaft and meshes with the rack.

3. The jujube harvesting pulse airflow generating device according to claim 1, characterized in that: The air pipe adopts a Laval nozzle structure.

4. The jujube harvesting pulse airflow generating device according to claim 1, characterized in that: The air source is a ducted fan.

5. The jujube harvesting pulse airflow generating device according to claim 1, characterized in that: The air inlet of the airflow channel is provided with three air pipes along the height direction, and the air inlet of each air pipe is connected to an air source.

6. The jujube harvesting pulse airflow generating device according to claim 1, characterized in that: The air inlet of the air source and the air outlet of the air pipe are both circular, and their axes are on the same straight line.

7. The jujube harvesting pulse airflow generating device according to claim 1, characterized in that: The disturbance plate has a streamlined structure and an up-and-down swing angle of ±35°.

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