A self-propelled chuanxiong planting machine with adjustable row spacing in heavy soil

Abstract

This invention discloses a self-propelled Ligusticum striatum planting machine with adjustable row and plant spacing in heavy clay soils, relating to the field of agricultural machinery. It includes a tracked vehicle and an adjustment frame mounted on the tracked vehicle, a linkage mechanism mounted on the adjustment frame, several guide rails vertically mounted on the linkage mechanism, and planting units mounted on the guide rails. The guide rails contain elastic elements, and the planting units are mounted above the elastic elements. This invention aims to solve the problem of existing Ligusticum striatum planting machines having difficulty controlling sowing depth and row spacing.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, specifically to a self-propelled Ligusticum chuanxiong planting machine with adjustable row and plant spacing in heavy clay soil. Background Technology

[0002] Ligusticum chuanxiong is mainly produced in Sichuan, and is also cultivated in Yunnan, Guizhou, Guangxi and other places. Ligusticum chuanxiong is not cold-resistant and is suitable for growing in a mild and humid environment. It is suitable for planting in loose, fertile, well-drained, humus-rich neutral or slightly acidic sandy loam soil.

[0003] Among existing Ligusticum striatum planting machines, the patent application number CN202310085269.3, entitled "A Ligusticum striatum Planting Machine," describes a planting device for Ligusticum striatum. This solves the technical problem that automated or semi-automated equipment cannot ensure that Ligusticum striatum seeds are transported in a single-species manner with the buds facing upwards, nor can it guarantee that Ligusticum striatum seeds are planted in a single-species manner. However, since Ligusticum striatum thrives in a mild and humid environment, resulting in high soil viscosity, it is difficult to control the sowing depth of Ligusticum striatum. At the same time, in order to maximize profits, for some plots of land with special dimensions, it is necessary to adjust the sowing row spacing of Ligusticum striatum according to the land size. Existing Ligusticum striatum planting machines do not have corresponding row spacing adjustment devices. Summary of the Invention

[0004] This invention provides a self-propelled Ligusticum striatum planting machine with adjustable plant spacing in heavy clay soils, in order to solve the problem that existing Ligusticum striatum planting machines have difficulty controlling the sowing depth and sowing row spacing.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A self-propelled Ligusticum chuanxiong planting machine with adjustable row and plant spacing in heavy clay soil includes a tracked vehicle and an adjustment frame mounted on the tracked vehicle. It also includes a linkage mechanism mounted on the adjustment frame, several guide rails vertically mounted on the linkage mechanism, and planting units mounted on the guide rails. The guide rails are provided with elastic elements, and the planting units are mounted above the elastic elements.

[0007] This invention installs individual planting units onto a linkage mechanism, utilizing the characteristics of the linkage mechanism to adjust the spacing between adjacent planting units while ensuring that the spacing between adjacent planting units is equal, thus ensuring equal row spacing for sowing *Ligusticum striatum* seeds. Furthermore, by installing the planting units into a guide rail to form a guide rail slider mechanism, and by setting elastic elements above or below the planting units, the planting units possess a certain degree of self-adaptation capability. This allows the planting units to automatically move upwards to avoid obstacles such as soil clods. Finally, by utilizing the weight of the planting units and the restoring ability of the elastic elements, the planting units are reset, ensuring consistent sowing depth for *Ligusticum striatum* seeds.

[0008] Furthermore, the linkage mechanism includes several parallel first links and several parallel second links. The first links and the second links are of equal length. The middle parts of the first links and the second links are rotatably connected. The two ends of the first links are rotatably connected to the ends of two adjacent second links, and the two ends of the second links are rotatably connected to the ends of two adjacent first links. The guide rail is fixedly installed on the rotation shaft at the middle of the first links and the middle of the second links.

[0009] An X-shaped structure is formed by the first and second connecting rods, and multiple X-shaped structures are connected into a whole to form a complete linkage mechanism. This allows each guide rail installed at the intersection of the X-shaped structure to move synchronously with the extension and retraction of the linkage mechanism, and ensures that the distance between two adjacent guide rails is equal and changes synchronously, thereby adjusting the sowing row spacing of Ligusticum striatum.

[0010] Furthermore, the linkage mechanism also includes a telescopic device mounted on the adjusting frame, with both ends of the telescopic device fixedly connected to the two guide rails that are furthest apart.

[0011] Because the linkage mechanism enables all guide rails to move in tandem, the spacing between all guide rails can be adjusted by adjusting the distance between the two furthest guide rails, which facilitates the adjustment of the sowing row spacing, and the force required to adjust the distance between the two furthest guide rails is relatively small.

[0012] Furthermore, the planting unit includes a hopper, a material picking component, a feeding component, and a planting component installed in the hopper, wherein the feeding component connects the end of the material picking component and the initial end of the planting component.

[0013] The silo is used to store the seeds of Ligusticum striatum. The seeds are taken out of the silo one by one by the material taking component and placed on the feeding component. The feeding component then delivers the seeds to the planting component for sowing.

[0014] Furthermore, the bottom of the hopper is provided with an opening, and the material handling assembly includes a circulating elevator that passes through the opening and several material handling hoppers that are evenly installed on the elevator.

[0015] Because the structure of *Ligusticum striatum* seed is a circular disc with cylindrical stems at both ends, it is quite complex. If the traditional funnel-shaped bottom opening method is used to send the *Ligusticum striatum* seed out of the silo, it will lead to uneven discharge. A small opening will easily cause blockage, while a large opening will easily cause burst discharge, which is difficult to control. Therefore, a circulating elevator is used to continuously transport the *Ligusticum striatum* seed out of the silo in sequence. The operating speed of the circulating elevator can control the output speed of the *Ligusticum striatum* seed. Optimizing the size of the hopper can control the number of *Ligusticum striatum* seeds taken out at one time, ensuring that the *Ligusticum striatum* seed does not accumulate in the subsequent devices.

[0016] Furthermore, the feeding assembly includes a lifting conveyor belt, with a ramp above the initial end of the lifting conveyor belt, the top of which is located at the unloading end of the feeding hopper.

[0017] Because the structure of the ligusticum seeds is approximately cylindrical, when the hopper takes out the ligusticum seeds and throws them onto the slope, the ligusticum seeds roll down the slope. This ensures that when the ligusticum seeds reach the bottom of the slope, the stems at both ends face the sides of the bottom of the slope. This ensures that the ligusticum seeds entering the lifting conveyor belt are consistent, which facilitates the transportation, processing and delivery of the ligusticum seeds by the lifting conveyor belt.

[0018] Furthermore, the feeding assembly also includes a clamping conveyor belt located on one side of the lifting conveyor belt. A V-shaped groove is formed between the conveying plane of the clamping conveyor belt and the conveying plane of the lifting conveyor belt. A rotating conveyor belt is provided at the end of the clamping conveyor belt. The conveying plane of the rotating conveyor belt is coplanar with the conveying plane of the clamping conveyor belt. The transmission direction of the rotating conveyor belt is upward along the conveying plane of the clamping conveyor belt.

[0019] Since the planting units are mounted on the tracked vehicle, they will be in a state of continuous vibration during the sowing process. However, the structure of the Ligusticum striatum seed is not a standard cylinder, and its placement can easily be passively changed during vibration, which is not conducive to the subsequent processing of the device. Therefore, a V-shaped groove is formed by the lifting conveyor belt and the clamping conveyor belt. The weight of the Ligusticum striatum seed is used to confine it within the V-shaped groove. Since the structure of the Ligusticum striatum seed consists of a circular disc and cylindrical stems at both ends, its overall length is greater than its diameter. Under the constraint of the V-shaped groove formed by the lifting and clamping conveyor belts, the sidewalls of the disc of the Ligusticum striatum seed will be tightly attached to the lifting and clamping conveyor belts, while the stems at both ends will extend along the V-shaped groove. This state of the Ligusticum striatum seed will not be easily changed, ensuring the consistency of the Ligusticum striatum seed's shape during the transportation process by the lifting and clamping conveyor belts.

[0020] In addition, a bud will grow on the disc of the Ligusticum striatum seed. When sowing the Ligusticum striatum seed, the bud needs to face upwards. Therefore, it is necessary to keep the buds facing the same direction during the sowing process. However, whether the Ligusticum striatum seed is picked up by a circulating elevator or transported by a ramp, lifting conveyor belt, or clamping conveyor belt, the bud of the Ligusticum striatum seed will face any direction, which is not conducive to sowing. Therefore, by setting a rotating conveyor belt at the end of the clamping conveyor belt, when the Ligusticum striatum seed is transported to the rotating conveyor belt, the disc of the Ligusticum striatum seed will contact both the lifting conveyor belt and the rotating conveyor belt at the same time. It will continue to move forward under the action of the lifting conveyor belt, while the conveying direction of the rotating conveyor belt is upward along the conveying plane of the clamping conveyor belt. This will give the Ligusticum striatum seed a rotational force, causing the Ligusticum striatum seed to rotate and change the direction of its bud. This allows the direction of the bud of the Ligusticum striatum seed to adjust itself during transportation, which is convenient for sowing.

[0021] Furthermore, a baffle is provided above the lifting conveyor belt to block the passage of the bud opening of the ligusticum seed. The installation position of the baffle corresponds to that of the rotating conveyor belt, and the width of the baffle is equal to the width of the rotating conveyor belt.

[0022] The rotating conveyor belt causes the ligusticum seeds to rotate laterally, changing the orientation of the buds. Then, a baffle prevents the ligusticum seeds from passing through, ensuring that the buds of the ligusticum seeds that pass through the baffle all face the direction of the baffle, which facilitates sowing.

[0023] Furthermore, the planting component includes a seed metering pipe installed at the end of the feeding component, and a trenching mechanism and a soil covering mechanism located on both sides of the seed metering pipe. The seed metering pipe has through holes for the seeds of Ligusticum striatum to pass through on the feeding component.

[0024] The seeds of Ligusticum striatum, conveyed by the feeding component, enter the seed metering pipe through the through hole. The seed metering pipe then delivers the seeds to the trenches opened by the ditching mechanism for sowing. Finally, the soil is backfilled by the covering mechanism.

[0025] Furthermore, the planting assembly also includes a lifting slider disposed within the seed metering tube. The lifting slider has two slots on the side facing the feeding assembly, with a gap between the two slots. The width of the slots is greater than or equal to the diameter of the stem of the *Ligusticum striatum* seed and less than the diameter of the *Ligusticum striatum* seed plate. The orientation of the slots is opposite to the direction of travel of the tracked vehicle. The lower end of the seed metering tube has a notch on the side facing the feeding assembly, and the length of the notch is greater than the length of the *Ligusticum striatum* seed.

[0026] When the seeds of Ligusticum striatum pass through the seed-discharging tube, they rub against the tube wall, causing them to rotate and change the orientation of their buds, which affects the sowing process. By using two slots on the lifting slider to secure the stems at both ends of the seeds, the seeds are moved to the lower end of the seed-discharging tube by the lifting slider, allowing them to detach from the slider and enter the soil to complete the sowing. This avoids the problem of the buds of the seeds changing orientation.

[0027] The sowing method is as follows: In the initial state, the lifting slider is located below the through hole. Under the conveying of the feeding component, one end of the stem of the *Ligusticum striatum* seed enters the seed dispensing tube through the through hole. The lifting slider rises, and the slot above the lifting slider contacts the stem that has entered the seed dispensing tube, causing the stem to embed into the slot. The lifting slider continues to rise, lifting the *Ligusticum striatum* seed so that the disc of the seed embeds into the gap between two slots. The other stem embeds into the slot located below the lifting slider, thus completing the restriction of the *Ligusticum striatum* seed by the lifting slider. The machine is positioned so that the lifting slider descends to the lower end of the seed metering tube. The lifting slider is then confined to the lower end of the seed metering tube, while the stem of the *Ligusticum striatum* seed at the lower end is inserted into the soil. The tracked vehicle continues to move forward, causing the stem of the *Ligusticum striatum* seed at the lower end to first disengage from the groove. Then, the *Ligusticum striatum* seed leaves the seed metering tube through the notch. Finally, the stem of the *Ligusticum striatum* seed at the upper end also disengages from the groove. At this point, the *Ligusticum striatum* seed is laid flat on the soil, and because the groove is oriented in the opposite direction to the direction of the tracked vehicle's movement, the clips on the disengaged *Ligusticum striatum* seed face upwards.

[0028] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0029] (1) This invention installs the planting unit onto the linkage mechanism, and uses the characteristics of the linkage mechanism to adjust the spacing between two adjacent planting units while ensuring that the spacing between two adjacent planting units is equal, thus ensuring that the row spacing of the sowing of Ligusticum striatum is equal. Then, by installing the planting unit into the guide rail to form a guide rail slider mechanism, and setting elastic elements above or below the planting unit, the planting unit has a certain self-adaptive ability, so that when the planting unit passes through obstacles such as soil clods, it can automatically move upward to avoid the obstacles. By using the self-weight of the planting unit and the reset ability of the elastic elements, the planting unit is reset, thus ensuring the consistency of the sowing depth of Ligusticum striatum.

[0030] (2) An X-shaped structure is formed by the first link and the second link, and multiple X-shaped structures are connected into a whole to form a complete linkage mechanism, so that each guide rail installed at the intersection of the X-shaped structure can move synchronously with the extension and retraction of the linkage mechanism, and can ensure that the distance between two adjacent guide rails is equal and changes synchronously, thereby adjusting the sowing row spacing of Ligusticum striatum.

[0031] (3) The ligusticum seeds in the silo are continuously transported out of the silo by the circulating elevator. The running speed of the circulating elevator can control the output speed of the ligusticum seeds. Optimizing the size of the hopper can control the number of ligusticum seeds taken out at one time, ensuring that the ligusticum seeds will not accumulate in the subsequent device.

[0032] (4) A V-shaped groove is formed by the lifting conveyor belt and the clamping conveyor belt. The weight of the Ligusticum striatum seed is used to confine it within the V-shaped groove. Since the structure of the Ligusticum striatum seed is a circular disc and cylindrical stems at both ends, its overall length is greater than its diameter. Under the constraint of the V-shaped groove formed by the lifting conveyor belt and the clamping conveyor belt, the side wall of the disc of the Ligusticum striatum seed will be tightly attached to the lifting conveyor belt and the clamping conveyor belt, while the stems at both ends will extend along the V-shaped groove. This state of the Ligusticum striatum seed will not be easily changed, ensuring the consistency of the Ligusticum striatum seed's morphology during the transportation process of the lifting conveyor belt and the clamping conveyor belt.

[0033] (5) By setting a rotating conveyor belt at the end of the clamping conveyor belt, when the ligusticum seeds are transported to the rotating conveyor belt, the disc nodes of the ligusticum seeds will contact both the lifting conveyor belt and the rotating conveyor belt at the same time. They will continue to move forward under the action of the lifting conveyor belt. The conveying direction of the rotating conveyor belt is upward along the conveying plane of the clamping conveyor belt, which will give the ligusticum seeds a rotational force, causing the ligusticum seeds to rotate and change the orientation of their buds. This allows the orientation of the ligusticum seeds' buds to be adjusted by themselves during the transportation process, which is convenient for sowing.

[0034] (6) The stems at both ends of the ligusticum seed are secured by the two slots on the lifting slider. The ligusticum seed is sent to the lower end of the seeding tube under the action of the lifting slider, so that the ligusticum seed is released from the lifting slider and enters the soil to complete the sowing. This avoids the problem of the bud opening on the ligusticum seed changing direction. Attached Figure Description

[0035] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention.

[0036] Figure 1 This is a schematic diagram of the linkage mechanism structure in this invention;

[0037] Figure 2 This is a cross-sectional view of the material handling component structure in this invention;

[0038] Figure 3 This is a top view of the feeding mechanism structure in this invention;

[0039] Figure 4 This is a cross-sectional view of the seeding tube structure in this invention;

[0040] Figure 5 This is a schematic diagram of the lifting slider structure in this invention;

[0041] Among them, 1-adjusting frame, 2-linkage mechanism, 201-first link, 202-second link, 203-telescopic device, 3-guide rail, 4-planting unit, 401-hopper, 402-opening, 403-circulating elevator, 404-feeding hopper, 405-lifting conveyor belt, 406-slope, 407-clamping conveyor belt, 408-rotating conveyor belt, 409-baffle, 410-seed metering pipe, 411-through hole, 412-lifting slider, 413-slot, 414-gap, 415-notch, 5-elastic element. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0044] Example 1

[0045] This embodiment provides a self-propelled Ligusticum chuanxiong planting machine with adjustable plant spacing in heavy clay soil, such as... Figures 1-5 As shown, it includes a tracked vehicle and an adjustment frame 1 mounted on the tracked vehicle. It also includes a linkage mechanism 2 mounted on the adjustment frame 1, several guide rails 3 vertically mounted on the linkage mechanism 2, and planting units 4 mounted on the guide rails 3. The guide rails 3 are provided with elastic elements 5, and the planting units 4 are mounted above the elastic elements 5.

[0046] The adjusting frame 1 is attached to the rear of the tracked vehicle and is towed forward by the tracked vehicle. In order to enhance the load-bearing capacity of the guide rail 3, it is preferable to set at least two sets of transverse rails on the adjusting frame 1. A slider is set on the back of the guide rail 3, which is embedded in the rail for sliding, providing additional load capacity for the guide rail 3 and preventing the guide rail 3 or the linkage mechanism 2 from being damaged due to excessive weight of the planting unit 4. The number of guide rails 3 and planting units 4 are equal and arbitrary, determined according to the number of rows to be sown simultaneously by the device. The length and number of linkage mechanisms 2 also need to be varied according to the number of guide rails 3. The elastic element 5 is preferably a spring, which is set below the planting unit 4 inside the guide rail 3. Preferably, a spring can also be set above the planting unit 4.

[0047] In a more preferred embodiment, the linkage mechanism 2 includes a plurality of parallel first linkages 201 and a plurality of parallel second linkages 202. The first linkages 201 and the second linkages 202 are of equal length. The middle part of the first linkage 201 and the middle part of the second linkage 202 are rotatably connected. The two ends of the first linkage 201 are rotatably connected to the ends of two adjacent second linkages 202, and the two ends of the second linkage 202 are rotatably connected to the ends of two adjacent first linkages 201. The guide rail 3 is fixedly installed on the rotation shaft at the middle part of the first linkage 201 and the middle part of the second linkage 202.

[0048] In this design, the number of first connecting rods 201 and second connecting rods 202 are equal, forming an X-shaped structure. The guide rail 3 is installed at the intersection of the X-shaped structure. In addition, since the end of the linkage mechanism 2 does not need to be connected to another connecting rod, the first connecting rod 201 and the second connecting rod 202 at the end only need to be half the length. One end of the linkage mechanism 2 is preferably fixed to the adjusting frame 1, and the other end can perform telescopic movement. Furthermore, in order to enhance the weighing capacity of the linkage mechanism 2, a transverse slide rail is preferably provided on the adjusting frame 1. A slider is provided on the pivot at the intersection of the X-shaped structure formed by the first connecting rod 201 and the second connecting rod 202. The slider is embedded in the slide rail and slides to enhance the weighing capacity of the linkage mechanism 2.

[0049] In a more preferred embodiment, the linkage mechanism 2 further includes a telescopic device 203 mounted on the adjustment frame 1, and the two ends of the telescopic device 203 are respectively fixedly connected to the two guide rails 3 that are furthest apart.

[0050] The telescopic device 203 is preferably a hydraulic telescopic device. The overall length of the linkage mechanism 2 is changed by hydraulic telescopic movement. Then, multiple first links 201 and second links 202 divide this overall length into the distance between two adjacent guide rails 3, which is the sowing distance of the Ligusticum chuanxiong planter. This ensures that even if the sowing row spacing is adjusted, all row spacings are equal, making the operation simple and quick.

[0051] Example 2

[0052] Based on Example 1, such as Figures 1-5 As shown, the planting unit 4 includes a hopper 401, a material picking component, a feeding component, and a planting component installed in the hopper 401. The feeding component connects the end of the material picking component and the beginning of the planting component. The bottom of the hopper 401 has an opening 402. The material picking component includes a circulating elevator 403 that passes through the opening 402 and several picking hoppers 404 that are evenly installed on the elevator.

[0053] The feeding component is connected at the discharge end of the feeding component and at the inlet of the planting component. Preferably, the opening 402 is equipped with a material blocking brush to prevent the ligusticum seeds from leaking from the bottom of the silo 401. The circulating elevator 403 carries the feeding hopper 404 through the opening 402. The feeding hopper 404 can push the material blocking brush aside to pass through. After the feeding hopper 404 passes through the opening 402, the material blocking brush resets and blocks the opening 402. The size of the feeding hopper 404 is set according to the size of the ligusticum seeds. Preferably, when the feeding hopper 404 passes through the silo 401, only one ligusticum seed is located in the feeding hopper 404.

[0054] In a more preferred embodiment, the feeding assembly includes a lifting conveyor belt 405, with a ramp 406 above the initial end of the lifting conveyor belt 405, and the top of the ramp 406 located at the unloading end of the feeding hopper 404.

[0055] The slope of ramp 406 should be 10°-15° to avoid excessive gravitational acceleration that could knock off the buds of the *Ligusticum striatum* seeds. Driven by the circulating elevator 403, the hopper 404 will flip at the unloading end, dumping the *Ligusticum striatum* seeds inside. The top of ramp 406 will receive the dumped *Ligusticum striatum* seeds and allow them to roll down ramp 406, ensuring that the stems at both ends of the seeds face opposite directions in the rolling direction. The *Ligusticum striatum* seeds received by the lifting conveyor belt 405 will all have roughly the same orientation, meaning that the orientation of one stem of the *Ligusticum striatum* seed is approximately the same as the conveying direction of the lifting conveyor belt 405.

[0056] In a more preferred embodiment, the feeding assembly further includes a clamping conveyor belt 407 located on one side of the lifting conveyor belt 405. A V-shaped groove is formed between the conveying plane of the clamping conveyor belt 407 and the conveying plane of the lifting conveyor belt 405. A rotating conveyor belt 408 is provided at the end of the clamping conveyor belt 407. The conveying plane of the rotating conveyor belt 408 is coplanar with the conveying plane of the clamping conveyor belt 407. The transmission direction of the rotating conveyor belt 408 is upward along the conveying plane of the clamping conveyor belt 407.

[0057] The conveying direction of the clamping conveyor belt 407 is the same as that of the lifting conveyor belt 405. Preferably, the conveying plane of the lifting conveyor belt 405 is inclined at an angle of 5°-10°. The clamping conveyor belt 407 and the lifting conveyor belt 405 form an asymmetrical V-shaped groove. The included angle of the V-shaped groove is determined according to the diameter of the disc segment of the *Ligusticum striatum* seed. Preferably, when the *Ligusticum striatum* seed is located at the bottom end of the V-shaped groove, its disc segment can simultaneously interact with the conveying plane of the lifting conveyor belt 405 and the conveying plane of the clamping conveyor belt 407. The conveying plane of the rotating conveyor belt 408 is coplanar with the conveying plane of the clamping conveyor belt 407. That is, the rotating conveyor belt 408 and the lifting conveyor belt 405 form a V-shaped groove of the same size. When the ligusticum seeds pass through, they can simultaneously contact the conveying plane of the lifting conveyor belt 405 and the conveying plane of the rotating conveyor belt 408. This allows the ligusticum seeds to be rotated by the rotating conveyor belt 408 while being conveyed by the lifting conveyor belt 405, thereby changing the orientation of the buds on the ligusticum seed plate nodes.

[0058] In a more preferred embodiment, a baffle 409 is provided above the lifting conveyor belt 405 to block the passage of the bud opening of the ligusticum seed. The installation position of the baffle 409 corresponds to that of the rotating conveyor belt 408, and the width of the baffle 409 is equal to the width of the rotating conveyor belt 408.

[0059] The lower end of the baffle is preferably tangent to the disc of the Ligusticum striatum seed, allowing the disc to rotate while preventing the buds from passing through. To prevent the buds from falling off, the lower edge of the baffle is rounded and can be wrapped with a layer of cushioning material such as rubber or silicone to reduce the impact force of the buds hitting the baffle. At the same time, it can also reduce the rotation speed of the rotating conveyor belt 408, so that the Ligusticum striatum seed only needs to rotate once on the rotating conveyor belt 408. This allows the baffle to block the buds while minimizing the rotation speed of the Ligusticum striatum seed.

[0060] Example 3

[0061] Based on any of the above embodiments, such as Figures 1-5 As shown, the planting assembly includes a seed dispensing pipe 410 installed at the end of the feeding assembly, and a trenching mechanism and a soil covering mechanism located on both sides of the seed dispensing pipe 410. The seed dispensing pipe 410 has a through hole 411 for the Ligusticum striatum seeds on the feeding assembly to pass through. The planting assembly also includes a lifting slider 412 disposed in the seed dispensing pipe 410. The lifting slider 412 has two slots 413 on the side facing the feeding assembly, and a gap 414 is provided between the two slots 413. The width of the slots 413 is greater than or equal to the diameter of the Ligusticum striatum seed stem, and less than the diameter of the Ligusticum striatum seed disc. The orientation of the slots 413 is opposite to the direction of travel of the tracked vehicle. The lower end of the seed dispensing pipe 410 has a notch 415 on the side facing the feeding assembly, and the length of the notch 415 is greater than the length of the Ligusticum striatum seed.

[0062] The installation positions of the ditching mechanism and the soil covering mechanism are determined according to the travel direction of the tracked vehicle. The installation order from front to back is: ditching mechanism, seeding pipe 410, and soil covering mechanism. The length of the through hole 411 is greater than the length of the Ligusticum striatum seed. The distance between the two slots 413 on the lifting slider 412 is greater than the thickness of the Ligusticum striatum seed disc and less than the length of the Ligusticum striatum seed. The size of the slot is preferably equal to the diameter of the Ligusticum striatum seed stem, so that the stem of the Ligusticum striatum seed can be embedded in the slot 413 and its rotation is restricted. The orientation of the slot 413 is opposite to the travel direction of the tracked vehicle. Similarly, the orientation of the through hole 411 and the notch 415 is also opposite to the travel direction of the tracked vehicle. The conveying direction of the feeding component is the same as the travel direction of the tracked vehicle. The lifting slider 412 can be a slider driven by a hydraulic telescopic rod or a slider with a certain weight, which is stretched by a traction device and falls by its own weight.

[0063] Example 4

[0064] Based on any of the above embodiments, the specific process for the Chuanxiong planting machine to complete sowing is as follows:

[0065] The linkage mechanism 2 is extended or shortened to adjust the sowing row spacing. The tracked vehicle moves forward. When the planting unit passes through an obstacle, the planting unit moves upward and the elastic element 5 deforms. After the planting unit passes through the obstacle, the planting units return to their original positions under their own weight. The elastic element 5 also returns to its original position and reduces the vibration of the planting unit.

[0066] Ligusticum striatum seeds are added to silos 401, either manually or by adding them to each silo 401 from a main silo. A circulating elevator 403 drives a hopper 404 to rotate, continuously collecting Ligusticum striatum seeds and pouring them onto a ramp 406. Targeting a single seed, the seed rolls down ramp 406, aligning its stem with both sides facing the direction of rolling. After passing ramp 406, the seed enters the lifting conveyor belt 405, where one of its stems faces the direction of the lifting conveyor belt. The conveying direction of the conveyor belt 405 is roughly the same. The *Ligusticum striatum* seed rolls on the inclined lifting conveyor belt 405 and comes into contact with the clamping conveyor belt 407, and is conveyed in the conveying direction until it comes into contact with the rotating conveyor belt 408. At this point, the lifting conveyor belt 405 lifts the *Ligusticum striatum* seed forward, while the rotating conveyor belt 408 rubs against the nodes of the *Ligusticum striatum* seed, causing it to rotate until its bud is blocked by the baffle 409. At this point, the posture of the *Ligusticum striatum* seed is such that the orientation of one of its stems is roughly the same as the conveying direction of the lifting conveyor belt 405, and its… The bud faces the direction of the baffle 409, i.e., upwards; the *Ligusticum striatum* seed continues to move to the through hole 411 of the seed-discharging tube 410, and one of the stems of the *Ligusticum striatum* seed extends into the through hole 411. Before this, the lifting slider 412 needs to be moved below the through hole 411, and then the lifting slider 412 is driven to rise. The stem extending into the through hole 411 is captured by the upper slot 413 on the lifting slider 412 and its rotation is restricted. The lifting slider 412 continues to rise, so that the other stem of the *Ligusticum striatum* seed is captured by the upper slot 413 on the lifting slider 412. The lower slot 413 captures and restricts the rotation of the seed. At this time, the bud of the seed faces the opposite direction of the tracked vehicle's movement, driving the lifting slider 412 to descend. This causes the stem of the seed located below to embed into the soil. Under the action of the tracked vehicle's movement, the stem of the seed located below disengages from the slot 413. The seed leaves the seed discharge pipe 410 through the notch 415. After the other stem of the seed also disengages from the slot 413, the seed falls completely into the soil. At this time, the seed is in the position of bud facing upwards, completing the sowing process.

[0067] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0068] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A self-propelled Ligusticum striatum planting machine with adjustable row and plant spacing in heavy clay soil, comprising a tracked vehicle and an adjusting frame (1) mounted on the tracked vehicle, characterized in that, It also includes a linkage mechanism (2) installed on the adjustment frame (1), several guide rails (3) vertically installed on the linkage mechanism (2) and planting units (4) installed on the guide rails (3), wherein the guide rails (3) are provided with elastic elements (5), and the planting units (4) are installed above the elastic elements (5); The planting unit (4) includes a hopper (401), a material picking component, a feeding component and a planting component installed in the hopper (401), wherein the feeding component connects the end of the material picking component and the beginning of the planting component; The bottom of the hopper (401) is provided with an opening (402), and the material handling component includes a circulating elevator (403) passing through the opening (402) and a number of material handling hoppers (404) evenly installed on the elevator. The feeding assembly includes a lifting conveyor belt (405), and a ramp (406) is provided above the initial end of the lifting conveyor belt (405). The top of the ramp (406) is located at the unloading end of the feeding hopper (404). The feeding assembly also includes a clamping conveyor belt (407), which is located on one side of the lifting conveyor belt (405). A V-shaped groove is formed between the conveying plane of the clamping conveyor belt (407) and the conveying plane of the lifting conveyor belt (405). A rotating conveyor belt (408) is provided at the end of the clamping conveyor belt (407). The conveying plane of the rotating conveyor belt (408) is coplanar with the conveying plane of the clamping conveyor belt (407). The transmission direction of the rotating conveyor belt (408) is upward along the conveying plane of the clamping conveyor belt (407).

2. The self-propelled Ligusticum chuanxiong planting machine with adjustable row and plant spacing in heavy clay soil as described in claim 1, characterized in that, The linkage mechanism (2) includes several parallel first links (201) and several parallel second links (202). The first links (201) and the second links (202) are of equal length. The middle part of the first link (201) and the middle part of the second link (202) are rotatably connected. The two ends of the first link (201) are rotatably connected to the ends of two adjacent second links (202), and the two ends of the second link (202) are rotatably connected to the ends of two adjacent first links (201). The guide rail (3) is fixedly installed on the rotation shaft of the middle part of the first link (201) and the middle part of the second link (202).

3. A self-propelled Ligusticum chuanxiong planting machine with adjustable row and plant spacing in heavy clay soil as described in claim 2, characterized in that, The linkage mechanism (2) also includes a telescopic device (203) installed on the adjustment frame (1), and the two ends of the telescopic device (203) are respectively fixedly connected to the two guide rails (3) that are furthest apart.

4. The self-propelled Ligusticum chuanxiong planting machine with adjustable plant spacing in heavy clay soil as described in claim 1, characterized in that, Above the lifting conveyor belt (405) is a baffle (409) for blocking the passage of the bud opening of the ligusticum seed. The installation position of the baffle (409) corresponds to that of the rotating conveyor belt (408), and the width of the baffle (409) is equal to the width of the rotating conveyor belt (408).

5. A self-propelled Ligusticum chuanxiong planting machine with adjustable row and plant spacing in heavy clay soil as described in claim 1, characterized in that, The planting assembly includes a seed discharge pipe (410) installed at the end of the feeding assembly, and a trenching mechanism and a soil covering mechanism located on both sides of the seed discharge pipe (410). The seed discharge pipe (410) is provided with a through hole (411) for the seed of Ligusticum striatum to pass through on the feeding assembly.

6. A self-propelled Ligusticum chuanxiong planting machine with adjustable row and plant spacing in heavy clay soil as described in claim 5, characterized in that, The planting assembly also includes a lifting slider (412) disposed in the seed metering pipe (410). The lifting slider (412) has two slots (413) on the side facing the feeding assembly. A gap (414) is provided between the two slots (413). The width of the slots (413) is greater than or equal to the diameter of the stem of the *Ligusticum striatum* seed and less than the diameter of the *Ligusticum striatum* seed plate. The orientation of the slots (413) is opposite to the direction of travel of the tracked vehicle. A notch (415) is provided at the lower end of the seed metering pipe (410) on the side facing the feeding assembly. The length of the notch (415) is greater than the length of the *Ligusticum striatum* seed.

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