Assembly of ground wheel transmission component of no-tillage precision fertilization seeder

CN224638492UActive Publication Date: 2026-08-18JILIN KANGDA AGRI MACHINERY
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Patent Information

Application Number
CN202521993581.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-17
Publication Date
2026-08-18
Estimated Expiration
2035-09-17

AI Technical Summary

Technical Problem

在动力传递过程中,株距与肥量调控装置、地轮传动组件各自独立,驱动与被驱动件要通过过渡件连接,需要一个复杂的地轮传动系统,增加损耗,操作复杂,效率低下

Benefits of technology

本实用新型将株距调控装置、肥量调控装置、地轮传动组件集成于一体,使地轮传动组件通过左、右离合机构直接与地轮传动轴连接,动力传递路径大幅缩短,减少了传统结构中多个过渡件带来的动力损耗,提高了传递效率。

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Abstract

This utility model relates to the field of agricultural seeding machinery technology, specifically to the assembly of a ground wheel transmission component for a no-till precision fertilizing seeder. The assembly includes a main crossbeam, a ground wheel transmission component, a ground wheel transmission shaft, a sowing shaft, and a fertilizer discharge shaft. It also includes a plant spacing control device and a fertilizer discharge control device. The left and right ground wheel transmission components are hinged to the plant spacing control device and the fertilizer discharge control device, respectively. The ground wheel transmission shaft is driven by the left and right ground wheel transmission components, respectively. The plant spacing control device and the fertilizer discharge control device are driven by the ground wheel transmission shaft. The sowing shaft and the fertilizer discharge shaft are driven by the plant spacing control device and the fertilizer discharge control device, respectively. This utility model integrates the plant spacing control device, the fertilizer discharge control device, and the ground wheel transmission component into one unit, significantly shortening the power transmission path of the ground wheel transmission component, reducing power loss caused by multiple transition parts in traditional structures, and improving transmission efficiency.
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Description

Technical Field

[0001] This utility model relates to the field of agricultural seeding machinery technology, specifically to the assembly of a ground wheel transmission component for a no-till precision fertilization seeder. Background Technology

[0002] In modern agricultural production, no-till precision fertilization seeders are being used more and more widely. In existing no-till seeders, the plant spacing and fertilizer application control devices and the ground wheel drive assembly are usually independent structures. During power transmission, the plant spacing and fertilizer application control devices and the ground wheel drive assembly are independent of each other, and the driving and driven parts need to be connected through a transition piece. This requires a complex ground wheel drive system, which increases losses, makes operation complicated, and results in low efficiency.

[0003] To address the problems existing in current no-till seeders, there is an urgent need for a new ground wheel transmission structure that can enable transmission between the wheel transmission components, plant spacing control device, and fertilizer application control device, in order to meet the needs of precision fertilization and seeding operations in agriculture. Utility Model Content

[0004] The purpose of this utility model is to provide an assembly of the ground wheel transmission component for a no-till precision fertilizing seeder. This assembly solves the technical problems in the background art by improving the ground wheel transmission structure of the no-till precision fertilizing seeder.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an assembly of the ground wheel transmission components of a no-till precision fertilization seeder, including a seeder main crossbeam, a ground wheel transmission assembly, a ground wheel transmission shaft, a sowing shaft, and a fertilizer discharge shaft; it also includes a plant spacing control device and a fertilizer amount control device fixedly installed on the seeder main crossbeam. The main crossbeam of the seeder is connected to the traction equipment; The ground wheel drive assembly includes a left ground wheel drive assembly and a right ground wheel drive assembly with identical structures and symmetrical arrangement; the left ground wheel drive assembly and the right ground wheel drive assembly are respectively hinged to the plant spacing control device and the fertilizer amount control device; The ground wheel drive shaft is connected to the left ground wheel drive assembly and the right ground wheel drive assembly respectively. The plant spacing control device and the fertilizer amount control device are connected to the ground wheel drive shaft. The sowing shaft and the fertilizer discharge shaft are connected to the plant spacing control device and the fertilizer amount control device respectively, so as to realize the transmission of power from the ground wheel drive assembly through the ground wheel drive shaft to the sowing shaft and the fertilizer discharge shaft.

[0006] Furthermore, both the plant spacing control device and the fertilizer application control device are sprocket assembly structures arranged vertically. A plant spacing adjustment device is coaxially installed at the left end of the ground wheel drive shaft. The lower part of the plant spacing adjustment device is connected to the ground wheel drive shaft, and the upper part of the plant spacing adjustment device is connected to the sowing shaft. A fertilizer quantity control device is coaxially mounted on the right end of the ground wheel drive shaft. The lower part of the fertilizer quantity control device is connected to the ground wheel drive shaft via a bearing, and the upper part of the fertilizer quantity control device is connected to the fertilizer discharge shaft.

[0007] Furthermore, it also includes a left clutch mechanism and a right clutch mechanism; The left clutch mechanism is located between the left ground wheel transmission assembly and the ground wheel transmission shaft, and the right clutch mechanism is located between the right ground wheel transmission assembly and the ground wheel transmission shaft, and is used to control the power supply and disconnection between the ground wheel transmission assembly and the ground wheel transmission shaft.

[0008] Furthermore, the left ground wheel drive assembly and the right ground wheel drive assembly have the same structure; The left ground wheel transmission assembly includes a wheel, a sprocket transmission structure, and a fixed bracket. The wheel is rotatably mounted on the left end of the fixed bracket, and the right end of the fixed bracket is hinged to the plant spacing adjustment device. The wheel is connected to one end of the sprocket transmission structure, and the other end of the sprocket transmission structure is connected to the left clutch mechanism.

[0009] Furthermore, it also includes a secondary hydraulic cylinder lifting mechanism and a main hydraulic cylinder lifting mechanism; The auxiliary hydraulic cylinder lifting mechanism is connected to the left ground wheel transmission assembly, and the main hydraulic cylinder lifting mechanism is connected to the right ground wheel transmission assembly; The auxiliary hydraulic cylinder lifting mechanism includes a hydraulic cylinder, piston rod, hydraulic oil pipe, hydraulic control valve, and mounting bracket. The mounting bracket of the auxiliary hydraulic cylinder lifting mechanism is fixedly installed on the fertilizer control device by bolts. The bottom of the hydraulic cylinder of the auxiliary hydraulic cylinder lifting mechanism is hinged to the middle of the fixed bracket of the left ground wheel transmission assembly by a pin. When the hydraulic cylinder of the auxiliary hydraulic cylinder lifting mechanism extends or retracts, it drives the left ground wheel transmission assembly to rotate around the ground wheel transmission shaft. The structure of the main hydraulic cylinder lifting mechanism is the same as that of the auxiliary hydraulic cylinder lifting mechanism. When the hydraulic cylinder of the main hydraulic cylinder lifting mechanism extends or retracts, it drives the right ground wheel transmission assembly to rotate around the ground wheel transmission shaft.

[0010] Beneficial effects This utility model integrates the plant spacing control device, fertilizer application control device, and ground wheel transmission assembly into one unit, allowing the ground wheel transmission assembly to be directly connected to the ground wheel transmission shaft through left and right clutch mechanisms. This significantly shortens the power transmission path, reduces power loss caused by multiple transition parts in traditional structures, and improves transmission efficiency.

[0011] This utility model connects the auxiliary oil cylinder lifting mechanism and the main oil cylinder lifting mechanism to the left and right ground wheel transmission components respectively. During operation, the operator can adjust the chassis height from the ground by controlling the extension and retraction of the hydraulic cylinders in the auxiliary oil cylinder lifting mechanism and the main oil cylinder lifting mechanism according to the soil hardness of different plots and the sowing depth requirements of different crops. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 This is a schematic diagram of the assembly structure of the ground wheel transmission component disclosed in this utility model; Figure 2 This is an exploded structural diagram of the assembly of the ground wheel transmission component disclosed in this utility model; Figure 3 This is a schematic diagram of the structure of the left ground wheel transmission assembly of the ground wheel transmission component disclosed in this utility model; Figure 4 This is a schematic diagram of the structure of the no-till precision fertilization seeder disclosed in this utility model.

[0014] In the picture: 1. Left ground wheel drive assembly; 101. Wheel; 102. Chain drive structure; 103. Fixed bracket; 2. Left clutch mechanism; 3. Plant spacing adjustment device; 4. Ground wheel drive shaft; 5. Seeding shaft; 6. Fertilizer discharge shaft; 7. Seeder main crossbeam; 8. Right clutch mechanism; 9. Fertilizer quantity adjustment device; 10. Right ground wheel drive assembly; 11. Auxiliary cylinder lifting mechanism; 12. Main cylinder lifting mechanism; 13. Seeding module; 14. Fertilizer quantity module. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] To achieve the above objectives, this utility model provides the following technical solution, such as... Figure 1-4 As shown, a ground wheel drive assembly of a no-till precision fertilization seeder includes a seeder main crossbeam 7, a ground wheel drive assembly, a ground wheel drive shaft 4, a seeding shaft 5, and a fertilizer discharge shaft 6; it also includes a plant spacing control device 3 and a fertilizer amount control device 9 fixedly installed on the seeder main crossbeam 7. The main crossbeam 7 of the seeder is connected to the traction device; the main crossbeam 7 of the seeder is used to connect with the external traction device to provide a traction foundation; it should be noted that the existing no-till precision fertilization seeders all include a sowing module 13, a fertilizer module 14, and a ground wheel transmission assembly, but the existing sowing module 13, fertilizer module 14, and ground wheel transmission assembly all have their own transmission structures, wherein the sowing module 13 and fertilizer module 14 are used for sowing and fertilization respectively, and their specific structures are prior art and will not be described in this application.

[0017] The ground wheel drive assembly includes a left ground wheel drive assembly 1 and a right ground wheel drive assembly 10 with identical structures and symmetrical arrangement; the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 are respectively hinged to the plant spacing control device 3 and the fertilizer amount control device 9. The ground wheel drive shaft 4 is connected to the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 respectively. The plant spacing control device 3 and the fertilizer amount control device 9 are connected to the ground wheel drive shaft 4. The sowing shaft 5 and the fertilizer discharge shaft 6 are connected to the plant spacing control device 3 and the fertilizer amount control device 9 respectively, so as to realize the transmission of power from the ground wheel drive assembly through the ground wheel drive shaft 4 to the sowing shaft 5 and the fertilizer discharge shaft 6.

[0018] Furthermore, both the plant spacing control device 3 and the fertilizer amount control device 9 are sprocket sets arranged vertically. The plant spacing control device 3 is connected to the ground wheel drive shaft 4 and the sowing shaft 5 respectively, and is used to transmit the power of the ground wheel drive shaft 4 to the sowing shaft 5 to drive the sowing module 13 to operate. The fertilizer amount control device 9 is connected to the ground wheel drive shaft 4 and the fertilizer discharge shaft 6 respectively, and is used to transmit the power of the ground wheel drive shaft 4 to the fertilizer discharge shaft 6 to drive the fertilizer amount module 14 to operate.

[0019] The left end of the ground wheel drive shaft 4 is coaxially equipped with a left clutch mechanism 2 and a plant spacing adjustment device 3. The lower part of the plant spacing adjustment device 3 is connected to the ground wheel drive shaft 4 through a bearing, and the upper part of the plant spacing adjustment device 3 is connected to the sowing shaft 5. The sowing shaft 5 is connected to the sowing module 13 for transmission. When the ground wheel drive shaft 4 rotates, it drives the plant spacing adjustment device 3 to rotate, thereby driving the sowing shaft 5 to drive the sowing module 13 to work. The right end of the ground wheel drive shaft 4 is coaxially equipped with a right clutch mechanism 8 and a fertilizer quantity control device 9. The lower part of the fertilizer quantity control device 9 is connected to the ground wheel drive shaft 4 through a bearing, and the upper part of the fertilizer quantity control device 9 is connected to the fertilizer discharge shaft 6. The fertilizer discharge shaft 6 is connected to the fertilizer quantity module 14 for transmission. When the ground wheel drive shaft 4 rotates, it drives the fertilizer quantity control device 9 to operate, which in turn drives the fertilizer discharge shaft 6 to drive the fertilizer quantity module 14 to work.

[0020] Furthermore, it also includes a left clutch mechanism 2 and a right clutch mechanism 8; The left clutch mechanism 2 is located between the left ground wheel transmission assembly 1 and the ground wheel transmission shaft 4, and the right clutch mechanism 8 is located between the right ground wheel transmission assembly 10 and the ground wheel transmission shaft 4, and is used to control the power supply between the ground wheel transmission assembly and the ground wheel transmission shaft 4.

[0021] Furthermore, the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 have the same structure; The left ground wheel drive assembly 1 includes a wheel 101, a sprocket drive structure 102, and a fixed bracket 103. The wheel 101 is rotatably mounted on the left end of the fixed bracket 103. The right end of the fixed bracket 103 is hinged to the plant spacing control device 3. The wheel 101 is connected to one end of the sprocket drive structure 102, and the other end of the sprocket drive structure 102 is connected to the left clutch mechanism 2, so that the rotational power of the wheel 101 is transmitted to the ground wheel drive shaft 4 through the sprocket drive structure 102 and the left clutch mechanism 2.

[0022] Furthermore, it also includes an auxiliary cylinder lifting mechanism 11 and a main cylinder lifting mechanism 12; The auxiliary hydraulic cylinder lifting mechanism 11 is connected to the left ground wheel transmission assembly 1, and the main hydraulic cylinder lifting mechanism 12 is connected to the right ground wheel transmission assembly 10. It is used to drive the ground wheel transmission assembly to rotate around the ground wheel transmission shaft 4 to adjust the chassis height above the ground.

[0023] The auxiliary hydraulic cylinder lifting mechanism 11 includes a hydraulic cylinder, piston rod, hydraulic oil pipe, hydraulic control valve, and mounting bracket. The mounting bracket of the auxiliary hydraulic cylinder lifting mechanism 11 is fixedly installed on the fertilizer control device 9 by bolts. The bottom of the hydraulic cylinder of the auxiliary hydraulic cylinder lifting mechanism 11 is hinged to the middle of the fixed bracket 103 of the left ground wheel transmission assembly 1 by a pin. When the hydraulic cylinder of the auxiliary hydraulic cylinder lifting mechanism 11 extends or retracts, it drives the left ground wheel transmission assembly 1 to rotate around the ground wheel transmission shaft 4. The structure of the main hydraulic cylinder lifting mechanism 12 is the same as that of the auxiliary hydraulic cylinder lifting mechanism 11. When the hydraulic cylinder of the main hydraulic cylinder lifting mechanism 12 extends or retracts, it drives the right ground wheel transmission assembly 10 to rotate around the ground wheel transmission shaft 4.

[0024] The working principle and process are as follows: During operation, the power transmission path of the ground wheel drive component in this application is mainly divided into two directions, corresponding to the driving of the sowing module 13 and the fertilizer module 14, respectively. The specific power transmission process is as follows: The first power transmission direction (driving the sowing module 13): When the external traction device drives the no-till precision fertilizing seeder, the wheel 101 in the left ground wheel transmission assembly 1 contacts the ground and rolls. The rotation of the wheel 101 drives the sprocket transmission structure 102 connected to it. At this time, if the left clutch mechanism 2 is engaged, the sprocket transmission structure 102 will transmit power to the outer ring of the left clutch mechanism 2. Since the inner ring of the left clutch mechanism 2 is fixedly connected to the ground wheel transmission shaft 4, the power will be transmitted to the ground wheel transmission shaft 4 through the left clutch mechanism 2, causing the ground wheel transmission shaft 4 to rotate. When the ground wheel transmission shaft 4 rotates, the plant spacing adjustment device 3 at its left end will operate accordingly. The plant spacing adjustment device 3 transmits power to the sowing shaft 5 through the sprocket assembly structure. The sowing shaft 5 then transmits power to the seed metering device in the sowing module 13, driving the seed metering device to work and complete the seed sowing operation.

[0025] The second power transmission direction (driving fertilizer module 14): While the external traction equipment drives the seeder, the wheel in the right ground wheel transmission assembly 10 contacts the ground and rolls and rotates. The wheel drives the sprocket transmission structure in the right ground wheel transmission assembly 10 to operate. If the right clutch mechanism 8 is engaged, the sprocket transmission structure transmits power to the outer ring of the right clutch mechanism 8. The inner ring of the right clutch mechanism 8 is fixed to the ground wheel transmission shaft 4, and the power is transmitted to the ground wheel transmission shaft 4 through the right clutch mechanism 8. When the ground wheel transmission shaft 4 rotates, the fertilizer quantity control device 9 at its right end operates accordingly. The fertilizer quantity control device 9 transmits power to the fertilizer discharge shaft 6 through the sprocket assembly structure. The fertilizer discharge shaft 6 transmits power to the fertilizer dispenser in the fertilizer module 14, driving the fertilizer dispenser to work.

[0026] The ground wheel transmission component of this application is also divided into two states during the working process: transportation state and operation state. When the no-till precision fertilizing seeder needs to be transported from one work plot to another, or moved during non-operational periods, the equipment is in transport mode. At this time, the operator controls the hydraulic system to supply high-pressure hydraulic oil to the hydraulic cylinders of the auxiliary cylinder lifting mechanism 11 and the main cylinder lifting mechanism 12. The piston rods extend, pushing the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 to rotate around their respective hinge points until the chassis height meets the transport requirements. The left clutch mechanism 2 and the right clutch mechanism 8 then disengage, cutting off the power transmission between the sprocket drive structure of the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 and the ground wheel drive shaft 4. When the external traction equipment drives the seeder to move, the wheels of the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 will rotate with the movement of the traction equipment. However, since the power cannot be transmitted to the ground wheel drive shaft 4, the ground wheel drive shaft 4 will not rotate. Consequently, the plant spacing control device 3, fertilizer control device 9, sowing shaft 5, and fertilizer discharge shaft 6 are all stationary. The sowing module 13 and fertilizer module 14 stop working, thus avoiding missed sowing and fertilizer leakage during transportation, and reducing unnecessary component wear and energy consumption.

[0027] When the no-till precision fertilizing seeder arrives at the work area and is ready to perform sowing and fertilization operations, the equipment switches to operating mode. First, the operator, based on the soil hardness of the work area and the required sowing depth of the crop, adjusts the auxiliary hydraulic cylinder lifting mechanism 11 and the main hydraulic cylinder lifting mechanism 12 through the hydraulic control system. This drives the left ground wheel transmission assembly 1 and the right ground wheel transmission assembly 10 to rotate around the hinge point, lowering the chassis until the entire seeder chassis is adjusted to the appropriate ground clearance (i.e., the height corresponding to the sowing depth). After the chassis ground clearance is adjusted, the left clutch mechanism 2 and the right clutch mechanism 8 switch to the engaged state, establishing a power transmission channel between the sprocket drive structure of the left ground wheel transmission assembly 1 and the right ground wheel transmission assembly 10 and the ground wheel drive shaft 4. Subsequently, the external traction equipment is activated, driving the seeder to move on the work plot. The wheels of the left ground wheel drive assembly 1 and the right ground wheel drive assembly 10 rotate under the action of ground friction. The power is transmitted to the ground wheel drive shaft 4 through the chain drive structure and clutch mechanism. The rotation of the ground wheel drive shaft 4 drives the plant spacing control device 3 and the fertilizer amount control device 9 to operate, and then drives the sowing module 13 and the fertilizer discharge module 14 to work through the sowing shaft 5 and the fertilizer discharge shaft 6 respectively.

[0028] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An assembly of the ground wheel drive components for a no-till precision fertilizing seeder, characterized in that, It includes the main crossbeam (7) of the seeder, the ground wheel drive assembly, the ground wheel drive shaft (4), the seeding shaft (5) and the fertilizer discharge shaft (6); it also includes the plant spacing control device (3) and the fertilizer amount control device (9) fixedly installed on the main crossbeam (7) of the seeder. The main crossbeam (7) of the seeder is connected to the traction equipment; The ground wheel drive assembly includes a left ground wheel drive assembly (1) and a right ground wheel drive assembly (10) with the same structure and symmetrical arrangement; the left ground wheel drive assembly (1) and the right ground wheel drive assembly (10) are respectively hinged to the plant spacing control device (3) and the fertilizer amount control device (9); The ground wheel drive shaft (4) is connected to the left ground wheel drive assembly (1) and the right ground wheel drive assembly (10) respectively. The plant spacing control device (3) and the fertilizer amount control device (9) are connected to the ground wheel drive shaft (4). The sowing shaft (5) and the fertilizer discharge shaft (6) are connected to the plant spacing control device (3) and the fertilizer amount control device (9) respectively, so as to realize the transmission of power from the ground wheel drive assembly through the ground wheel drive shaft (4) to the sowing shaft (5) and the fertilizer discharge shaft (6).

2. The assembly of the ground wheel drive components of the no-till precision fertilizing seeder according to claim 1, characterized in that, Both the plant spacing control device (3) and the fertilizer application control device (9) are sprocket sets arranged vertically. The plant spacing control device (3) is coaxially installed on the left end of the ground wheel drive shaft (4). The lower part of the plant spacing control device (3) is connected to the ground wheel drive shaft (4), and the upper part of the plant spacing control device (3) is connected to the sowing shaft (5). The right end of the ground wheel drive shaft (4) is coaxially provided with a fertilizer amount control device (9). The lower part of the fertilizer amount control device (9) is connected to the ground wheel drive shaft (4) through a bearing, and the upper part of the fertilizer amount control device (9) is connected to the fertilizer discharge shaft (6).

3. The assembly of the ground wheel drive components of the no-till precision fertilizing seeder according to claim 1, characterized in that, It also includes a left clutch mechanism (2) and a right clutch mechanism (8); The left clutch mechanism (2) is located between the left ground wheel transmission assembly (1) and the ground wheel transmission shaft (4), and the right clutch mechanism (8) is located between the right ground wheel transmission assembly (10) and the ground wheel transmission shaft (4), and is used to control the power supply and disconnection between the ground wheel transmission assembly and the ground wheel transmission shaft (4).

4. The assembly of the ground wheel drive components of the no-till precision fertilizing seeder according to claim 3, characterized in that, The left ground wheel drive assembly (1) and the right ground wheel drive assembly (10) have the same structure; The left ground wheel transmission assembly (1) includes a wheel (101), a sprocket transmission structure (102) and a fixed bracket (103). The wheel (101) is rotatably mounted on the left end of the fixed bracket (103). The right end of the fixed bracket (103) is hinged to the plant spacing control device (3). The wheel (101) is connected to one end of the sprocket transmission structure (102), and the other end of the sprocket transmission structure (102) is connected to the left clutch mechanism (2).

5. The assembly of the ground wheel drive components of the no-till precision fertilizing seeder according to claim 4, characterized in that, It also includes an auxiliary cylinder lifting mechanism (11) and a main cylinder lifting mechanism (12). The auxiliary cylinder lifting mechanism (11) is connected to the left ground wheel transmission assembly (1), and the main cylinder lifting mechanism (12) is connected to the right ground wheel transmission assembly (10). The auxiliary cylinder lifting mechanism (11) includes a hydraulic cylinder, piston rod, hydraulic oil pipe, hydraulic control valve and mounting bracket. The mounting bracket of the auxiliary cylinder lifting mechanism (11) is fixedly installed on the fertilizer control device (9) by bolts. The bottom of the hydraulic cylinder of the auxiliary cylinder lifting mechanism (11) is hinged to the middle of the fixed bracket (103) of the left ground wheel transmission assembly (1) by a pin. When the hydraulic cylinder of the auxiliary cylinder lifting mechanism (11) extends or retracts, it drives the left ground wheel transmission assembly (1) to rotate around the ground wheel transmission shaft (4). The structure of the main cylinder lifting mechanism (12) is the same as that of the auxiliary cylinder lifting mechanism (11). When the hydraulic cylinder of the main cylinder lifting mechanism (12) extends or retracts, it drives the right ground wheel transmission assembly (10) to rotate around the ground wheel transmission shaft (4).