Hydraulic system for a rice transplanter

Abstract

The application discloses a hydraulic system of a rice transplanter, comprising an oil tank, the oil tank being in communication with a variable pump module and a constant pump module respectively, the variable pump module being in communication with a differential lock module, the differential lock module being in communication with a hydraulic motor group, the constant pump module being in communication with a steering module, and the variable pump module, the differential lock module, the constant pump module and the steering module being electrically connected with a controller module. The application has the beneficial effects that: power transmission is carried out in a full hydraulic mode, the transmission structure is greatly simplified, a variable hydraulic system is adopted, the stepless speed regulation is realized, the function of low-speed large-torque output is improved, more escape force is provided for a mechanical farmland stuck vehicle, the passability is improved, two reserved hydraulic power sources can provide power for other towed devices, the hydraulic power can realize linear motion through a hydraulic cylinder and can realize rotary motion through a motor, and better support is provided for the multifunctionality of an agricultural machinery power chassis.

Description

Technical Field

[0001] This application belongs to the field of agricultural machinery technology, specifically relating to a hydraulic system for a rice transplanter. Background Technology

[0002] Existing agricultural machinery, such as rice transplanters, tractors, and combine harvesters, has long relied on mechanical transmission systems. After years of development, this technology has evolved into a mature system comprised of components such as clutches, gearboxes, drive shafts, and chains. It achieves rigid power transmission from the engine to the working device through gear meshing and shaft rotation, featuring an intuitive structure, mature manufacturing processes, and relatively low cost, thus laying a solid foundation for the widespread adoption and application of agricultural machinery.

[0003] However, mechanical transmission structures have significant drawbacks: their rigid layout cannot flexibly adapt to the complex and ever-changing operational needs of modern agricultural machinery; the high impact load during transmission easily leads to premature wear and failure of parts; and they have high energy loss, which is not conducive to energy conservation and environmental protection. Furthermore, continuously variable speed control and precise power distribution usually require complex mechanisms, increasing design and manufacturing costs. These inherent defects have prompted the industry to seek better solutions. Hydraulic drive technology, due to its advantages such as flexible transmission, continuously variable speed control, ease of layout, and overload protection, is gradually becoming an important development direction for agricultural machinery transmission systems. Utility Model Content

[0004] The purpose of this application is to provide a hydraulic system for a rice transplanter that solves the drawbacks of the mechanical transmission structure of traditional agricultural machinery.

[0005] The objective of this application is achieved through the following technical solution: A hydraulic system for a rice transplanter includes an oil tank, which is connected to a variable pump module and a fixed pump module. The variable pump module is connected to a differential lock module, the differential lock module is connected to a hydraulic motor assembly, and the fixed pump module is connected to a steering module. The variable pump module, differential lock module, fixed pump module, and steering module are all electrically connected to a controller module.

[0006] Furthermore, the variable pump module includes an inlet / outlet solenoid valve, a variable pump, and a make-up pump. The oil tank is connected to the make-up pump. The variable pump is connected to the differential lock module through a circulation pipeline. The make-up pump is connected to the inlet / outlet solenoid valve and the circulation pipeline. The inlet / outlet solenoid valve is connected to the variable mechanism of the variable pump. The inlet / outlet solenoid valve is electrically connected to the controller module.

[0007] Furthermore, the differential lock module includes a primary distribution valve, a secondary distribution valve, a differential lock pilot valve, and a differential lock valve. The hydraulic motor assembly includes a left hydraulic motor and a right hydraulic motor. The variable pump module is connected to the primary distribution valve, the differential lock pilot valve, and the two differential lock valves. The differential lock pilot valve is connected to the two differential lock valves. The two differential lock valves are connected to the left hydraulic motor and the right hydraulic motor, respectively. The primary distribution valve is connected to the two secondary distribution valves. The two secondary distribution valves are connected to the left hydraulic motor and the right hydraulic motor, respectively. The differential lock pilot valve is electrically connected to the controller module.

[0008] Furthermore, both the left-side hydraulic motor and the right-side hydraulic motor include a front hydraulic motor and a rear hydraulic motor, and the two-stage distribution valve is connected to the front hydraulic motor and the rear hydraulic motor respectively.

[0009] Furthermore, the steering module includes a steering solenoid valve and a steering cylinder, a fixed displacement pump module is connected to the steering solenoid valve, the steering solenoid valve is connected to the steering cylinder, and the steering solenoid valve is electrically connected to the controller module.

[0010] Furthermore, the metering pump module is connected to the lifting module, the metering pump module is connected to the rice transplanting module, and both the lifting module and the rice transplanting module are electrically connected to the controller module.

[0011] Furthermore, the lifting module includes a lifting solenoid valve and a lifting cylinder. The metering pump module is connected to the lifting solenoid valve, the lifting solenoid valve is connected to the lifting cylinder, and the lifting solenoid valve is electrically connected to the controller module.

[0012] Furthermore, the rice transplanting module includes a rice transplanting solenoid valve and a rice transplanting motor. The metering pump module is connected to the rice transplanting solenoid valve, the rice transplanting solenoid valve is connected to the rice transplanting motor, and the rice transplanting solenoid valve is electrically connected to the controller module.

[0013] Furthermore, it also includes a fuel engine and a battery, with the fuel engine's generator module electrically connected to the battery, and the battery electrically connected to the controller module.

[0014] Furthermore, it also includes a remote control, which communicates wirelessly with the controller module.

[0015] The beneficial effects of this application are: (1) The power transmission is carried out by a full hydraulic method, which greatly simplifies the transmission structure. At the same time, the variable hydraulic system is used to realize stepless speed regulation and improve the function of low speed and high torque output, providing greater extrication force for mechanical farm vehicles stuck in the ground and improving their passability.

[0016] (2) By reserving two hydraulic power sources, power can be provided to other towed devices. The hydraulic power can achieve linear motion through hydraulic cylinders and rotational motion through motors. It is not limited by traditional mechanical transmission, which is more convenient and provides better support for the multi-functionality of agricultural machinery power chassis.

[0017] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the process principle of this application.

[0019] Figure 2 yes Figure 1 Enlarged view on the left.

[0020] Figure 3 This is a schematic diagram of the electrical principle of this application.

[0021] In the diagram: 1-oil tank, 2-variable pump module, 3-differential lock module, 4-hydraulic motor assembly, 5-fixed displacement pump module, 6-steering module, 7-lifting module, 8-transplanting module, 9-in / out solenoid valve, 10-variable pump, 11-first unloading valve, 12-replenishing pump, 13-first-stage distribution valve, 14-second-stage distribution valve, 15-differential lock pilot valve, 16-differential lock valve, 17-left hydraulic motor, 18-right hydraulic motor, 106 - Front hydraulic motor, 111 - Rear hydraulic motor, 21 - Second unloading valve, 22 - Pressure sensor, 23 - Steering solenoid valve, 113 - Steering cylinder, 25 - Lifting solenoid valve, 202 - Lifting cylinder, 27 - Rice transplanting solenoid valve, 206 - Rice transplanting motor, 28 - Third unloading valve, 29 - Rear motor encoder, 214 - Rice transplanting motor encoder, 31 - Controller module, 102 - Fuel engine, 33 - Battery, 116 - Radiator. Detailed Implementation

[0022] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0023] Example 1 refer to Figures 1-3 As shown, a hydraulic system for a rice transplanter includes an oil tank 1, a variable pump module 2, a differential lock module 3, a hydraulic motor assembly 4, a fixed displacement pump module 5, a steering module 6, a lifting module 7, a transplanting module 8, a controller module 31, a fuel engine 102, a storage battery 33, and a remote controller.

[0024] Oil tank 1 is used for oil storage, enabling the supply and recovery of hydraulic fluid. Oil tank 1 is connected to variable pump module 2 and fixed displacement pump module 5 respectively, providing oil supply for both types of pumps. Variable pump module 2 supplies oil to the downstream end in variable quantities, while fixed displacement pump module 5 supplies oil to the downstream end in fixed quantities.

[0025] The variable displacement pump module 2 is connected to the differential lock module 3, which in turn is connected to the hydraulic motor assembly 4. The differential lock module 3 is used to switch between differential lock functions, allowing for high traction during locking or flexible movement during differential operation. The hydraulic motor assembly 4 rotates under hydraulic pressure, driving the corresponding wheels to roll.

[0026] The metering pump module 5 is connected to the steering module 6, which adjusts the steering of the motor outriggers. The metering pump module 5 is also connected to the lifting module 7, which adjusts the height of the transplanter tailplate. Finally, the metering pump module 5 is connected to the transplanting module 8, which provides power for transplanting.

[0027] The variable pump module 2, differential lock module 3, fixed displacement pump module 5, steering module 6, lifting module 7 and rice transplanting module 8 are all electrically connected to the controller module 31. The controller module 31 monitors the working status of each module and adjusts the working mode of each module accordingly.

[0028] The variable pump module 2, differential lock module 3, and hydraulic motor unit 4 form a closed hydraulic system. Since walking is the continuous and most basic function of the rice transplanter, the use of a closed hydraulic system can ensure efficient and accurate walking. The fixed displacement pump module 5, steering module 6, lifting module 7, and transplanting module 8 form an open hydraulic system. Since the operation function is discontinuous and simple, the use of an open hydraulic system can simplify the structure.

[0029] The variable pump module 2 includes an inlet / outlet solenoid valve 9, a variable pump 10, a first unloading valve 11, and a replenishing pump 12. The oil tank 1 is connected to the replenishing pump 12, which is also connected to the inlet / outlet solenoid valve 9. The replenishing pump 12 supplies variable adjustment oil to the inlet / outlet solenoid valve 9. The inlet / outlet solenoid valve 9 is connected to the variable mechanism of the variable pump 10 and is electrically connected to the controller module 31. The controller module 31 provides an electrical signal to the inlet / outlet solenoid valve 9, which, through the oil, drives the variable mechanism of the variable pump 10 to adjust the flow rate of the variable pump 10.

[0030] The variable displacement pump 10 is connected to the differential lock module 3 via a circulation pipeline to supply oil to the differential lock module 3. The variable displacement pump 10 is preferably a bidirectional variable displacement pump, and the replenishment pump 12 is connected to the low-pressure side of the circulation pipeline to replenish the circulating power oil. The first unloading valve 11 is connected to the circulation pipeline for safe pressure relief.

[0031] The differential lock module 3 includes a primary distribution valve 13, a secondary distribution valve 14, a differential lock pilot valve 15, and a differential lock valve 16. The hydraulic motor assembly 4 includes a left hydraulic motor 17 and a right hydraulic motor 18. The circulation lines of the variable pump 10 in the variable pump module 2 are connected to the primary distribution valve 13, the differential lock pilot valve 15, and the two differential lock valves 16, respectively. The oil supplied to the primary distribution valve 13 and the differential lock valves 16 is motor power oil, while the oil supplied to the differential lock pilot valve 15 is differential lock switching oil.

[0032] The differential lock pilot valve 15 is connected to two differential lock valves 16, which are connected to the left hydraulic motor 17 and the right hydraulic motor 18, respectively. The differential lock pilot valve 15 is electrically connected to the controller module 31, which provides an electrical signal to the differential lock pilot valve 15. The differential lock pilot valve 15 switches between differential and lock states through the differential lock valves 16, thereby changing the travel mode.

[0033] The primary distribution valve 13 is connected to two secondary distribution valves 14, which are respectively connected to the left hydraulic motor 17 and the right hydraulic motor 18. The primary distribution valve 13 is used to distribute the motor power oil between the left and right sides. Both the left hydraulic motor 17 and the right hydraulic motor 18 include a front hydraulic motor 106 and a rear hydraulic motor 111. The secondary distribution valves 14 are connected to the front hydraulic motor 106 and the rear hydraulic motor 111, respectively, and perform the distribution between the front and rear on that side.

[0034] When the differential lock pilot valve 15 is closed, the high-pressure hydraulic fluid cannot pass through the differential lock pilot valve 15. At this time, the differential lock valve 16 is in the open state under its own spring force. The hydraulic oil of the variable pump 10 can directly enter the four motors through the differential lock valve 16, or it can enter the motors through the first-stage distribution valve 13 and the second-stage distribution valve 14. At this time, the flow rate through the four motors is automatically distributed according to the motor speed requirements, and it is in real-time four-wheel drive mode.

[0035] When the differential lock pilot valve 15 is opened, high-pressure hydraulic fluid can pass through it. At this time, the differential lock valve 16 is closed under the pilot control pressure. The hydraulic oil from the variable pump cannot enter the motor through the differential lock valve 16, but can only enter the four motors through the first-stage distribution valve 13 and the second-stage distribution valve 14. After being divided by the distribution valves, the flow rate through the four motors is equal, and the four motors are in differential lock mode, maintaining a consistent speed. The second unloading valve 21 is connected to the motor pipeline and the circulation pipeline for safe pressure relief.

[0036] The steering module 6 includes a steering solenoid valve 23 and a steering cylinder 113. The fixed displacement pump module 5 is connected to the steering solenoid valve 23, which is connected to the steering cylinder 113. The steering solenoid valve 23 is electrically connected to the controller module 31, which provides an electrical signal to the steering solenoid valve 23. The steering solenoid valve 23 controls the extension and retraction of the steering cylinder 113 through hydraulic fluid. The extension and retraction of the steering cylinder 113 is converted into the rotation adjustment of the motor outrigger, thereby realizing the steering function.

[0037] The lifting module 7 includes a lifting solenoid valve 25 and a lifting cylinder 202. The metering pump module 5 is connected to the lifting solenoid valve 25, which is connected to the lifting cylinder 202. The lifting solenoid valve 25 is electrically connected to the controller module 31, which provides an electrical signal to the lifting solenoid valve 25. The lifting solenoid valve 25 controls the extension and retraction of the lifting cylinder 202 through hydraulic fluid. The extension and retraction of the lifting cylinder 202 is converted into the lifting and lowering adjustment of the transplanting tail plate, thereby realizing the function of adjusting the transplanting depth.

[0038] The rice transplanting module 8 includes a rice transplanting solenoid valve 27 and a rice transplanting motor 206. The metering pump module 5 is connected to the rice transplanting solenoid valve 27, which is connected to the rice transplanting motor 206. The rice transplanting solenoid valve 27 is electrically connected to the controller module 31, which provides an electrical signal to the rice transplanting solenoid valve 27. The rice transplanting solenoid valve 27 controls the rotation of the rice transplanting motor 206 through oil, and the rotation of the rice transplanting motor 206 is then transmitted to the rice transplanting mechanism through the universal joint assembly, thereby providing the power for rice transplanting.

[0039] A radiator 116 is also installed on the oil tank 1 for cooling the oil. Pressure sensors 22 are installed on each pipeline of the system to monitor the pressure of each pipeline and prevent abnormal operation of the system. A third unloading valve 28 is installed on the oil supply line of the metering pump module 5 for safe pressure relief. The rear hydraulic motor 111 is equipped with a rear motor encoder 29, and the transplanting motor 206 is equipped with a transplanting motor encoder 214 to monitor the motor speed. The transplanting motor has an encoder to measure the motor speed, and the two rear wheel motors also have encoders to provide the speed of the rear wheels, providing the basic data required for system control. The controller adjusts the transplanting spacing by comparing the walking speed and adjusting the transplanting motor speed in real time. By setting the transplanting spacing program, transplanting functions with different spacing requirements can be met.

[0040] The internal combustion engine 102 serves as the power source for the system, providing power to each pump unit. The generator module of the internal combustion engine 102 is electrically connected to the battery 33, and the battery 33 is electrically connected to the controller module 31, thereby supplying power to the controller module 31.

[0041] The remote controller and controller module 31 communicate wirelessly. Currently, agricultural machinery still requires manual operation in the field. Although some equipment has remote control capabilities, this is still achieved by adding automatic driving mechanisms and equipment to the existing manual driving system, resulting in cost waste and equipment complexity. This system uses hydraulic drive technology and electrical control technology. The remote controller and controller can effectively achieve remote control. Furthermore, since this system requires no manual operation and is entirely electrically controlled, it can provide a data interface for future unmanned driving.

[0042] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic system for a rice transplanter, comprising an oil tank (1), characterized in that: The oil tank (1) is connected to the variable pump module (2) and the fixed pump module (5) respectively. The variable pump module (2) is connected to the differential lock module (3). The differential lock module (3) is connected to the hydraulic motor group (4). The fixed pump module (5) is connected to the steering module (6). The variable pump module (2), the differential lock module (3), the fixed pump module (5) and the steering module (6) are all electrically connected to the controller module (31).

2. The hydraulic system of the rice transplanter according to claim 1, characterized in that: The variable pump module (2) includes an inlet / outlet solenoid valve (9), a variable pump (10) and a replenishing pump (12). The oil tank (1) is connected to the replenishing pump (12). The variable pump (10) is connected to the differential lock module (3) through a circulation pipeline. The replenishing pump (12) is connected to the inlet / outlet solenoid valve (9) and the circulation pipeline respectively. The inlet / outlet solenoid valve (9) is connected to the variable mechanism of the variable pump (10). The inlet / outlet solenoid valve (9) is electrically connected to the controller module (31).

3. The hydraulic system of the rice transplanter according to claim 1 or 2, characterized in that: The differential lock module (3) includes a primary distribution valve (13), a secondary distribution valve (14), a differential lock pilot valve (15), and a differential lock valve (16). The hydraulic motor assembly (4) includes a left hydraulic motor (17) and a right hydraulic motor (18). The variable pump module (2) is connected to the primary distribution valve (13), the differential lock pilot valve (15), and the two differential lock valves (16). The differential lock pilot valve (15) is connected to the two differential lock valves (16). The two differential lock valves (16) are connected to the left hydraulic motor (17) and the right hydraulic motor (18). The primary distribution valve (13) is connected to the two secondary distribution valves (14). The two secondary distribution valves (14) are connected to the left hydraulic motor (17) and the right hydraulic motor (18). The differential lock pilot valve (15) is electrically connected to the controller module (31).

4. The hydraulic system of the rice transplanter according to claim 3, characterized in that: The left hydraulic motor (17) and the right hydraulic motor (18) both include a front hydraulic motor (106) and a rear hydraulic motor (111), and the secondary distribution valve (14) is connected to the front hydraulic motor (106) and the rear hydraulic motor (111) respectively.

5. The hydraulic system of the rice transplanter according to claim 1, characterized in that: The steering module (6) includes a steering solenoid valve (23) and a steering cylinder (113). The metering pump module (5) is connected to the steering solenoid valve (23), the steering solenoid valve (23) is connected to the steering cylinder (113), and the steering solenoid valve (23) is electrically connected to the controller module (31).

6. The hydraulic system of the rice transplanter according to claim 1, characterized in that: The metering pump module (5) is connected to the lifting module (7), and the metering pump module (5) is connected to the rice transplanting module (8). Both the lifting module (7) and the rice transplanting module (8) are electrically connected to the controller module (31).

7. The hydraulic system of the rice transplanter according to claim 6, characterized in that: The lifting module (7) includes a lifting solenoid valve (25) and a lifting cylinder (202). The metering pump module (5) is connected to the lifting solenoid valve (25), the lifting solenoid valve (25) is connected to the lifting cylinder (202), and the lifting solenoid valve (25) is electrically connected to the controller module (31).

8. The hydraulic system of the rice transplanter according to claim 6 or 7, characterized in that: The transplanting module (8) includes a transplanting solenoid valve (27) and a transplanting motor (206). The metering pump module (5) is connected to the transplanting solenoid valve (27), the transplanting solenoid valve (27) is connected to the transplanting motor (206), and the transplanting solenoid valve (27) is electrically connected to the controller module (31).

9. The hydraulic system of the rice transplanter according to claim 1, characterized in that: It also includes a fuel engine (102) and a battery (33), the power generation module of the fuel engine (102) is electrically connected to the battery (33), and the battery (33) is electrically connected to the controller module (31).

10. The hydraulic system of the rice transplanter according to claim 1 or 9, characterized in that: It also includes a remote control, which communicates wirelessly with the controller module (31).

Images