Seeding rate adjusting device of small four-row rice direct seeding machine

Abstract

The invention relates to the technical field of agricultural seeding machines, in particular to a seeding rate adjusting device of a small four-row rice direct seeding machine. Comprising a machine head, a supporting mechanism, a seeding rate adjusting mechanism and a seeding mechanism, the seeding rate adjusting mechanism is provided with four gear matching mechanisms and four gear executing mechanisms, and the transverse displacement of the gear matching mechanisms is adjusted by switching different gear rods so as to perform gear shifting matching on the gear executing mechanisms; the seed metering mechanism adjusts seed metering rotation based on the rotating speed of a power output shaft of the gear executing mechanism, and adjustment of different seeding rates of different rice is achieved. The seeding rate of one or more seeding devices can be simultaneously adjusted on the machine head through the operating rod, the seeding rate adjustment consistency is good, and the adjustment mode is convenient. The invention reduces the labor intensity of workers, promotes the rapid development of the precision direct seeding machine for paddy rice in hilly and mountainous regions, improves the labor productivity of paddy rice planting in hilly and mountainous regions, reduces the cost, increases the efficiency, and improves the comprehensive production capacity of paddy rice.

Description

Technical Field

[0001] This invention relates to the field of agricultural seeding technology, and in particular to a seeding rate adjustment device for a small four-row rice direct seeding machine. Background Technology

[0002] Compared to manual broadcasting, direct seeding technology for rice not only significantly improves operational efficiency and reduces planting costs, but also effectively reduces labor intensity. Furthermore, rice direct seeders feature precise hill-planting capabilities, ensuring consistent planting depth and accurate control of row and plant spacing. Simultaneously, the seed metering device can adjust the seeding rate according to different rice varieties and regional agronomic requirements. The small four-row rice direct seeder is specifically designed for small-plot operations in hilly and mountainous areas, adapting well to various small-plot environments.

[0003] However, most existing rice direct seeding machines use an individual, independent seeding rate adjustment method. Adjusting the seeding rate requires stopping the machine, keeping all seed metering devices running, and manually adjusting the seeding rate for each device one by one. Furthermore, the seeding rate needs to be manually identified and confirmed. This results in poor consistency and low accuracy in seeding rate adjustment, and the process is cumbersome and inconvenient. An integrated seeding rate adjustment method offers better consistency, but it is not suitable for adjusting the seeding rate after replacing some seed metering devices. Summary of the Invention

[0004] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention proposes a seeding rate adjustment device for a small four-row rice direct seeding machine.

[0005] The technical solution of the present invention is as follows: A seeding rate adjustment device for a small four-row rice direct seeding machine, comprising: Machine head; A support mechanism is mounted on the machine head; A broadcast rate adjustment mechanism is mounted on the support mechanism, and the broadcast rate adjustment mechanism includes: A control assembly, mounted on the engine head near the driver's seat, the control assembly having multiple shift levers; A drive motor is mounted on the support mechanism; The output adjustment component has four gear matching mechanisms and four gear actuation mechanisms. The gear matching mechanisms and the gear actuation mechanisms are structurally matched during gear shifting. The gear matching mechanisms are connected to the gear levers. By switching different gear levers, the lateral displacement of the gear matching mechanisms is adjusted to perform gear shifting matching on the gear actuation mechanisms. Four seeding mechanisms are installed at intervals on the support mechanism, each seeding mechanism including: The first shell and the second shell, together, form a row of cavities; The power transmission shaft, when connected to the gear shifting mechanism, forms a power unit; A seeding power shaft is inserted into the seeding cavity to drive seeding, and a seeding power gear is installed on the seeding power shaft located outside the seeding cavity; The seeding rate adjustment shaft is connected to the power output shaft of the gear actuator. The seeding rate adjustment shaft is equipped with a seeding rate adjustment gear that meshes with the seeding power gear. The seeding rotation of the seeding power shaft is adjusted based on the rotation speed of the power output shaft of the gear actuator to achieve different seeding rates for different types of rice.

[0006] In one possible technical solution, the gear shifting mechanism further includes: The first and second side plates, which are arranged in parallel, form a gear working cavity; A power input shaft passes through the gear working cavity and is movably connected to the first side plate and the second side plate. The power input shaft is connected to the power transmission shaft of the adjacent seeding mechanism. The first and second main transmission gears are spaced apart and mounted on the power input shaft within the gear working cavity; An idler gear is installed on the inner wall of the second side plate and is located in the same vertical plane as the second main transmission gear. The idler gear and the second main transmission gear are distributed at intervals. A first power output shaft passes through the gear working cavity and is movably connected to the first side plate and the second side plate; The first and second transmission gears are spaced apart and mounted on the first power output shaft within the gear working cavity, and the second transmission gear meshes with the idler gear. The second power output shaft is located outside the gear working cavity and is connected to the first power output shaft. The second power output shaft, which is away from the first power output shaft, is connected to the broadcast volume adjustment shaft.

[0007] In one possible technical solution, the gear matching mechanism further includes: The intermediate shaft is mounted on the first side plate and can be moved left and right relative to the first side plate; The first matching gear and the second matching gear are fitted onto the intermediate shaft at intervals; A stepless push rod is installed on one side of the first side plate outside the gear working cavity. One end is connected to the intermediate shaft, and the other end is connected to the gear shift lever of the operating component. The position of the intermediate shaft can be adjusted by shifting gears with the gear shift lever, thereby controlling whether the first matching gear or the second matching gear is matched with the gear of the gear shifting mechanism.

[0008] In one possible technical solution, the control component further includes four levers, each lever corresponding to a gear matching mechanism. The levers have three gears. By shifting different gears, the position of the levers is adjusted to adjust the lateral displacement of the gear matching mechanism, thereby performing gear shifting matching on the gear actuator.

[0009] In one possible technical solution, the support mechanism further includes: Three-point mounting brackets are installed on the machine head; The crossbeam is connected to the three-point hook-and-loop fastener; Two support bases are installed on both sides of the crossbeam; The first support tube and the second support tube are installed in parallel on the support base. The second support tube has multiple through holes for fixing the seed metering device, thereby ensuring the consistency of the row spacing for rice sowing. The speed reducer is mounted on the crossbeam.

[0010] In one possible technical solution, both the first housing and the second housing have two countersunk holes and one through hole. The countersunk holes have built-in tight-fit bearings for mounting the power transmission shaft, the seeding power shaft, and the seeding rate adjustment shaft.

[0011] In one possible technical solution, the power transmission shaft has a countersunk hole on one end face, which is connected to the power input shaft by a pin, and a through hole on the other end, which is connected to the second bushing pin.

[0012] In one possible technical solution, the end of the volume adjustment shaft near the volume adjustment mechanism is machined with an external thread, which is threaded to the second power output shaft to improve connection stability, and the other end is an optical shaft with a scale.

[0013] In one possible technical solution, it further includes: The first bushing connects the power transmission shaft to the drive motor; The square bushing connects the seeding power shaft between adjacent seeding mechanisms; The second bushing connects the power transmission shaft to the power input shaft.

[0014] The seeding rate adjustment device for the small four-row rice direct seeding machine according to the present invention allows for simultaneous adjustment of the seeding rate of one or more seeders via a joystick on the machine head. This results in good consistency and convenient adjustment of the seeding rate. The present invention reduces manual labor intensity, promotes the rapid development of precision direct seeding machines for rice in hilly and mountainous areas, improves labor productivity in rice cultivation in these areas, reduces costs and increases efficiency, and enhances the overall rice production capacity.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 A schematic diagram of the seeding rate adjustment device for a small four-row rice direct seeding machine provided by the present invention; Figure 2 A schematic diagram of the support mechanism provided by the present invention; Figure 3 This is a schematic diagram of the distribution adjustment mechanism provided by the present invention; Figure 4 A schematic diagram of the operating component of the broadcast volume adjustment mechanism provided by the present invention; Figure 5 A schematic diagram of the broadcast adjustment component of the broadcast adjustment mechanism provided by the present invention; Figure 6 This is a schematic diagram of the structure of the second side plate of the broadcast volume adjustment component provided by the present invention; Figure 7 This is a schematic diagram of the structure of the first side plate of the broadcast volume adjustment component provided by the present invention; Figure 8 Left view of the structural schematic of the seed metering mechanism provided by the present invention; Figure 9 Right view of the structural schematic of the seed metering mechanism provided by the present invention; Figure 10 This is a schematic diagram of the connection structure between the seeding rate adjustment mechanism and the seed metering mechanism provided by the present invention.

[0018] In the diagram: 1 is the machine head; 2 is the support mechanism; 201 is the three-point connector; 202 is the limit support spring; 203 is the crossbeam; 204 is the support base; 205 is the first support tube; 206 is the second support tube; 207 is the reducer; 3 is the feed rate adjustment mechanism; 301 is the operating component; 302 is the drive motor; 303 is the feed rate adjustment component; 30301 is the first side plate; 30302 is the power input shaft; 30303 is the first transmission main gear; 30304 is the bushing; 30305 is the second transmission main gear; 30306 is the second side plate; 30307 is the second matching gear. 30308 is an idler wheel; 30309 is an idler wheel shaft; 30310 is a first power output shaft; 30311 is a second transmission pair gear; 30312 is a coupling sleeve; 30313 is a first transmission pair gear; 30314 is a second power output shaft; 30315 is an intermediate shaft; 30316 is a first matching gear; 30317 is a continuously variable push rod; 4 is a seed metering mechanism; 401 is a first housing; 402 is a power transmission shaft; 403 is a seed metering power shaft; 404 is a seeding rate adjustment shaft; 405 is a second housing; 501 is a first bushing; 502 is a square bushing; 503 is a second bushing. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, it may include a series of steps or units, or optionally, steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0023] The accompanying drawings show only the portions relevant to this application, not all of them. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations may be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0024] The terms “component,” “module,” “system,” “unit,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, a thread of execution, a program, and / or distributed between two or more computers. Furthermore, these units can be executed from various computer-readable media on which various data structures are stored. Units can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from a second unit interacting with another unit between a local system, a distributed system, and / or a network; for example, the Internet interacting with other systems via signals).

[0025] Example 1 like Figures 1 to 10 As shown, this embodiment provides a seeding rate adjustment device for a small four-row rice direct seeding machine, which includes: Head 1; Support mechanism 2 is installed on the machine head 1; The broadcast volume adjustment mechanism 3 is mounted on the support mechanism 2, and the broadcast volume adjustment mechanism 3 includes: The control assembly 301 is mounted on the engine head 1 near the driver's seat, and the control assembly 301 has multiple shift levers; The drive motor 302 is mounted on the support mechanism 2; The dispensing volume adjustment component 303 has four gear matching mechanisms and four gear actuation mechanisms. The gear matching mechanisms and gear actuation mechanisms are structurally matched during gear shifting. The gear matching mechanisms are connected to the gear levers. By switching different gear levers, the lateral displacement of the gear matching mechanisms is adjusted to match the gear actuation mechanisms during gear shifting. The gear shifting mechanism includes: The first side plate 30301 and the second side plate 30306, which are arranged in parallel, form a gear working cavity; The power input shaft 30302 passes through the gear working cavity and is movably connected to the first side plate 30301 and the second side plate 30306. The power input shaft 30302 is connected to the power transmission shaft 402 of the adjacent seeding mechanism 4 to form a power unit for driving the power input shaft 30302 to rotate. The first transmission main gear 30303 and the second transmission main gear 30305 are spaced apart and mounted on the power input shaft 30302 within the gear working cavity. In this embodiment, the first transmission main gear 30303 and the second transmission main gear 30305 have different numbers of teeth to provide different rotational speeds. An idler wheel 30308 is installed on the inner wall of the second side plate 30306 and is located in the same vertical plane as the second transmission main gear 30305. The idler wheel 30308 and the second transmission main gear 30305 are spaced apart. In this embodiment, the idler wheel 30308 is installed on the inner wall of the second side plate 30306 through an idler wheel shaft 30309. The first power output shaft 30310 passes through the gear working cavity and is movably connected to the first side plate 30301 and the second side plate 30306; The first transmission pair gear 30313 and the second transmission pair gear 30311 are spaced apart and mounted on the first power output shaft 30310 in the gear working cavity. The second transmission pair gear 30311 meshes with the idler gear 30308. The second power output shaft 30314 is located outside the gear working cavity and is connected to the first power output shaft 30310. The second power output shaft 30314, which is away from the first power output shaft 30310, is connected to the broadcast volume adjustment shaft 404.

[0026] The gear matching mechanism includes: The intermediate shaft 30315 is mounted on the first side plate 30301 and can be moved left and right relative to the first side plate 30301. The first matching gear 30316 and the second matching gear 30307 are spaced apart and mounted on the intermediate shaft 30315; The stepless push rod 30317 is installed on one side of the first side plate 30301 outside the gear working cavity. One end is connected to the intermediate shaft 30315, and the other end is connected to the gear shift lever of the operating component 301. The position of the intermediate shaft 30315 can be adjusted by shifting gears with the gear shift lever, thereby controlling whether the first matching gear 30316 or the second matching gear 30307 is matched with the gear of the gear shifting mechanism.

[0027] Four seeding mechanisms 4 are installed at intervals on the support mechanism 2, and each seeding mechanism 4 includes: The first shell 401 and the second shell 405 cooperate to form a row of seed cavities; The power transmission shaft 402, after being connected to the gear shifting mechanism, forms a power unit. In this embodiment, at least one power unit is connected to the drive motor 302 to drive the power unit to rotate. A seeding power shaft 403 is inserted into the seeding cavity to drive seeding. A seeding power gear is installed on the seeding power shaft 403 located outside the seeding cavity. The seeding rate adjustment shaft 404 is connected to the power output shaft of the gear actuator. The seeding rate adjustment shaft 404 is equipped with a seeding rate adjustment gear that meshes with the seeding power gear. The seeding rotation of the seeding power shaft 403 is adjusted based on the rotation speed of the power output shaft of the gear actuator to achieve different seeding rates for different types of rice.

[0028] It should be noted that in this embodiment, the four power units share a single drive motor 302, and each seeding mechanism 4 is equipped with a gear actuator on one side to adjust the seeding speed of the seeding mechanism 4 and adjust the seeding amount.

[0029] It should be noted that, in this embodiment, the support mechanism 2 includes: The three-point connector 201 is installed on the machine head 1; The crossbeam 203 is connected to the three-point hook-and-loop connector 201; Two support bases 204 are installed on both sides of the crossbeam 203; The first support tube 205 and the second support tube 206 are installed in parallel on the support base 204. The second support tube 206 has multiple through holes for fixing the seed metering device, thereby ensuring the consistency of the row spacing for rice sowing. The reducer 207 is mounted on the crossbeam 203. Specifically, in this embodiment, the front part of the three-point hook 201 is welded from multiple sheet metal parts and is fixed to the machine head 1 by pins and bolts. Each end has a pull ring connected to the limiting support spring 202. The rear part consists of a bearing seat, and the bottom end is bolted to the crossbeam 203, allowing the crossbeam 203 to rotate slightly. The limiting support spring 202 connects the three-point hook 201 and the crossbeam 203, providing tension to the crossbeam 203 and reducing swaying caused by machine movement vibrations. The support base 204 is made of a hollow... The machine is constructed from welded sheet metal parts and bolted to the crossbeam 203. One support is installed on each side, symmetrically distributed. The upper end is fixed to the first support tube 205 and the second support tube 206 by pins, and the lower end is connected to the soil-covering base plate. The drive motor is fixed on the support base 204 on the left side. The second support tube 206 has four evenly distributed through holes in the middle section, and the seed metering device is fixed by bolts to ensure the uniformity of the row spacing for rice sowing. The reducer 207 is installed inside the crossbeam 203, with its front end connected to the PTO drive shaft of the machine head 1 and its rear end connected to the transmission system via chain drive.

[0030] It should be noted that in this embodiment, the power input shaft 30302 has a through hole 4cm from its end face at each of its left and right ends, which is connected to the seed metering mechanism 4 via a pin; the second matching gear 30307 and the first matching gear 30316 have built-in bearings and are mounted on the intermediate shaft 30315. The intermediate shaft 30315 does not rotate and has a through hole 4cm from its right end face, and a countersunk hole on its right end face, which is connected to the stepless push rod 30317 via a pin, allowing it to move linearly; the idler wheel 30308 has... A bearing is installed on the idler shaft 30309; the idler shaft 30309 is welded to the second side plate 30306; the second power output shaft 30314 has an internal threaded hole at its left end, which is threaded to the seed metering mechanism 4, and a through hole is opened 4cm from the right end face, which is connected to the first power output shaft 30310 through the coupling sleeve 30312; the stepless push rod 30317 is powered by the battery on the machine head 1, and the extension, retraction and stopping of the push rod are realized by the controller through the operating component 301.

[0031] It should be noted that, in this embodiment, the gear shifting mechanism further includes: The bushing 30304 is mounted on the power input shaft 30302 and is used to provide support, positioning and reduce friction for the rotating power output shaft 30302, while protecting the shaft and bearing housing from wear.

[0032] The coupling sleeve 30312 is installed on the first power output shaft 30310 and is used to provide support, positioning and reduce friction for the rotating power output shaft 30302, while protecting the shaft and bearing housing from wear.

[0033] It should be noted that, in this embodiment, the control component 301 includes four control levers, each control lever corresponding to a gear matching mechanism. The control levers have three gears. By shifting different gears, the position of the control levers is adjusted to adjust the lateral displacement of the gear matching mechanism, thereby performing gear shifting matching on the gear actuator.

[0034] It should be noted that in this embodiment, the three settings are: the foremost setting is high-volume setting I, the middle setting is neutral setting II, and the last setting is low-volume setting III.

[0035] It should be noted that, in this embodiment, both the first housing 401 and the second housing 405 have two countersunk holes and one through hole. The countersunk holes have built-in tight-fit bearings for installing the power transmission shaft 402, the seeding power shaft 403, and the seeding rate adjustment shaft 404, supporting the internal gear structure of the seeding rate adjustment mechanism 303. The bottom end has two semi-circular notches. The lower notch is hung on the first support tube 205 to provide support, while the upper notch avoids the main power shaft of the seeding mechanism 4 to prevent interference.

[0036] It should be noted that, in this embodiment, one end face of the power transmission shaft 402 has a countersunk hole, which is connected to the power input shaft 30302 by a pin, and the other end has a through hole, which is connected to the second bushing 503 by a pin.

[0037] It should be noted that, in this embodiment, the end of the volume adjustment shaft 404 near the volume adjustment mechanism 303 is threaded with an external thread, which is threaded to the second power output shaft 30314 to improve connection stability, and the other end is an optical shaft with a scale.

[0038] It should be noted that, in this embodiment, one end of the power transmission shaft 402 in the seeding mechanism 4 located at the end is connected to the drive motor 302 through the first bushing 501.

[0039] It should be noted that in this embodiment, the seeding mechanism 4 adjusts the seeding rate by moving the seeding rate adjustment shaft 404 to adjust the depth of the orifice. The specific structure and working principle of the seeding rate adjustment of the seeding wheel are disclosed in the prior art, so they will not be described in detail here.

[0040] It should be noted that in this embodiment, during seeding rate adjustment, the drive motor 302 operates, and the four levers individually control the corresponding seeding rate adjustment mechanism 303. The initial position of the lever is neutral II, at which time the stepless push rod 30317 is in the middle stroke position, the second matching gear 30307 and the first matching gear 30316 are in the middle position and do not mesh with any gear, so the seeding rate of the seeding mechanism 4 does not change. When the lever is pushed forward, it is in the high seeding rate I position, and the stepless push rod 30317 retracts to the shortest stroke position. The first matching gear 30316 and the first transmission main... When gear 30303 and the first transmission pair gear 30313 mesh, power is transmitted from the second power output shaft 30314 to the distribution volume adjustment shaft 404, thereby increasing the distribution volume; when the control lever is pulled back, it is in the small distribution volume position III, and the stepless push rod 30317 extends forward to the maximum stroke position. The second matching gear 30307 meshes with the second transmission main gear 30305 and the idler gear 30308. The idler gear 30308 meshes with the second transmission pair gear 30311, thereby reversing the second power output shaft 30314 and transmitting power to the distribution volume adjustment shaft 404, thereby decreasing the distribution volume.

[0041] The seeding rate adjustment device for the small four-row rice direct seeding machine according to the present invention allows for simultaneous adjustment of the seeding rate of one or more seeders via a joystick on the machine head. This results in good consistency and convenient adjustment of the seeding rate. The present invention reduces manual labor intensity, promotes the rapid development of precision direct seeding machines for rice in hilly and mountainous areas, improves labor productivity in rice cultivation in these areas, reduces costs and increases efficiency, and enhances the overall rice production capacity.

[0042] Example 2 This embodiment further improves upon Embodiment 1, proposing a seeding rate adjustment device for a small four-row rice direct seeding machine, specifically including: The first bushing 501 connects the power transmission shaft 402 and the drive motor 302; The square bushing 502 connects the seeding power shaft 403 between adjacent seeding mechanisms 4. Specifically, the seeding power shaft 403 has square shafts at both ends and through holes. It is connected to the adjacent seeding power shaft 403 through the square bushing 502 and the adjacent seeding power shaft 403 by a pin. The second bushing 503 connects the power transmission shaft 402 and the power input shaft 30302, and is used to provide support, positioning and reduce friction for the rotating power output shaft 30302, the seeding power shaft 403 and the power transmission shaft 402, while protecting the shaft and bearing housing from wear.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0044] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0045] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0046] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A seeding rate adjustment device for a small four-row rice direct seeding machine, characterized in that, include: Machine head (1); Support mechanism (2) is installed on the machine head (1); A broadcast rate adjustment mechanism (3) is installed on the support mechanism (2), and the broadcast rate adjustment mechanism (3) includes: The control assembly (301) is mounted on the engine head (1) near the driver's seat, and the control assembly (301) has multiple shift levers; A drive motor (302) is mounted on the support mechanism (2); The output adjustment component (303) has four gear matching mechanisms and four gear execution mechanisms. The gear matching mechanism and the gear execution mechanism are structurally matched when shifting gears. The gear matching mechanism is connected to the gear lever. By switching different gear levers, the lateral displacement of the gear matching mechanism is adjusted to perform gear shifting matching on the gear execution mechanism. Four seeding mechanisms (4) are installed at intervals on the support mechanism (2), and each seeding mechanism (4) includes: The first shell (401) and the second shell (405) cooperate to form a row of seed cavities; The power transmission shaft (402) is connected to the gear shifting mechanism to form a power unit; A seeding power shaft (403) is inserted into the seeding cavity to drive seeding, and a seeding power gear is installed on the seeding power shaft (403); The seeding rate adjustment shaft (404) is connected to the power output shaft of the gear actuator. The seeding rate adjustment shaft (404) is equipped with a seeding rate adjustment gear that meshes with the seeding power gear. The seeding rotation of the seeding power shaft (403) is adjusted based on the rotation speed of the power output shaft of the gear actuator to achieve different seeding rates for different types of rice.

2. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 1, characterized in that, The gear shifting mechanism includes: The first side plate (30301) and the second side plate (30306) arranged in parallel form a gear working cavity; The power input shaft (30302) passes through the gear working cavity and is movably connected to the first side plate (30301) and the second side plate (30306). The power input shaft (30302) is connected to the power transmission shaft (402) of the adjacent seeding mechanism (4). The first transmission main gear (30303) and the second transmission main gear (30305) are spaced apart and mounted on the power input shaft (30302); An idler gear (30308) is installed on the inner wall of the second side plate (30306) and is located in the same vertical plane as the second transmission main gear (30305); The first power output shaft (30310) passes through the gear working cavity and is movably connected to the first side plate (30301) and the second side plate (30306); The first transmission pair gear (30313) and the second transmission pair gear (30311) are spaced apart and mounted on the first power output shaft (30310). The second transmission pair gear (30311) meshes with the idler gear (30308). The second power output shaft (30314) is located outside the gear working cavity and is connected to the first power output shaft (30310). The second power output shaft (30314), which is away from the first power output shaft (30310), is connected to the broadcast volume adjustment shaft (404).

3. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 1, characterized in that, The gear matching mechanism includes: An intermediate shaft (30315) is mounted on the gear shifting mechanism; The first matching gear (30316) and the second matching gear (30307) are spaced apart and mounted on the intermediate shaft (30315); The stepless push rod (30317) is installed on one side of the first side plate (30301), with one end connected to the intermediate shaft (30315) and the other end connected to the stop rod of the control assembly (301).

4. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 1, characterized in that, The control assembly (301) includes four control levers, each corresponding to a gear matching mechanism. The control levers have three gears. By shifting to different gears, the position of the control levers is adjusted to adjust the lateral displacement of the gear matching mechanism, thereby performing gear shifting matching on the gear actuator.

5. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 1, characterized in that, The support mechanism (2) includes: The three-point connector (201) is installed on the machine head (1); The crossbeam (203) is connected to the three-point connector (201); Two support bases (204) are installed on both sides of the crossbeam (203); The first support tube (205) and the second support tube (206) are installed in parallel on the support base (204), wherein the second support tube (206) has multiple through holes; The speed reducer (207) is mounted on the crossbeam (203).

6. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 1, characterized in that, Both the first housing (401) and the second housing (405) have two countersunk holes and one through hole, with a tight-fitting bearing installed in the countersunk hole.

7. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 2, characterized in that, The power transmission shaft (402) has a countersunk hole on one end face and is connected to the power input shaft (30302) by a pin.

8. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 2, characterized in that, The end of the distribution adjustment shaft (404) near the distribution adjustment mechanism (303) has an external thread, which is threaded to the second power output shaft (30314).

9. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 7, characterized in that, One end of the power transmission shaft (402) in the seeding mechanism (4) located at the end is connected to the drive motor (302).

10. The seeding rate adjustment device for a small four-row rice direct seeding machine according to claim 1, characterized in that, Also includes: The first bushing (501) connects the power transmission shaft (402) and the drive motor (302). The square bushing (502) connects the seeding power shaft (403) between adjacent seeding mechanisms (4); The second bushing (503) connects the power transmission shaft (402) and the power input shaft (30302).

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