Hydraulic device for rice transplanter and rice transplanter

Abstract

The utility model relates to a kind of rice transplanter hydraulic device and rice transplanter, and rice transplanter hydraulic device includes hydraulic oil tank, steering pump, torque amplifier, gear pump, control valve, hydraulic stepless speed changer and lifting cylinder, gear pump is drivingly connected with hydraulic stepless speed changer;Torque amplifier's oil inlet is communicated with hydraulic oil tank by first oil inlet pipeline, and torque amplifier's oil return is communicated with hydraulic oil tank by first oil return pipeline;The oil inlet of control valve is communicated with hydraulic oil tank by second oil inlet pipeline, and control valve is connected with lifting cylinder, and the oil return of lifting cylinder and control valve is respectively communicated with hydraulic oil tank after being supplemented with oil by second oil return pipeline and third oil return pipeline by hydraulic stepless speed changer;Steering pump is equipped on first oil inlet pipeline, and gear pump is equipped on second oil inlet pipeline.The utility model uses steering pump to oil supply torque amplifier alone, can separate the steering hydraulic system of rice transplanter and working system, and can be quickly and accurately determined fault.

Description

Technical Field

[0001] This utility model relates to the technical field of rice transplanters, specifically to a hydraulic device for a rice transplanter and a rice transplanter. Background Technology

[0002] Currently, most rice transplanter hydraulic systems power the gear pump located in the right housing of the gearbox. The hydraulic oil first passes through a torque amplifier for steering, then through a control valve (for flow control) for lifting. The return oil from the control valve replenishes the hydraulic continuously variable transmission (HST), forming a series hydraulic circuit. The hydraulic system's oil source is the three-way oil from the gearbox. For example... Figure 1 As shown, the existing hydraulic system of the rice transplanter uses a three-way oil system. Oil flows from the inside of the gearbox 19 through the suction filter 23 to the inlet of the gear pump 4. High-pressure oil flows from the outlet of the gear pump 4 to the torque amplifier 3, then to the control valve 5, and finally to the lifting cylinder 7. The oil then returns to the hydraulic continuously variable transmission 6 for replenishment, enabling the vehicle's steering and the raising and lowering of the planting platform. When the lifting cylinder 7 fails to lift, it's impossible to determine whether the problem lies with the control valve 5 or the torque amplifier 3. It could be due to a stuck control valve 5, severe internal leakage in the torque amplifier 3 (leading to frequent replacements), or insufficient oil suction from the pump caused by a clogged suction filter 23.

[0003] Due to limitations in manufacturing processes and materials, the gearbox of a rice transplanter generates a significant amount of impurities during gear meshing during vehicle operation. This is fatal to the hydraulic system. Rice transplanters operate for concentrated periods, which can easily lead to problems such as control valve jamming and gear pump wear. Furthermore, when problems occur, the interconnected nature of the system makes it difficult to accurately identify the faulty component immediately. Utility Model Content

[0004] This utility model provides a hydraulic device for a rice transplanter and a rice transplanter in order to solve one or more technical problems existing in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a hydraulic device for a rice transplanter, including a hydraulic oil tank, a steering pump, a torque amplifier, a gear pump, a control valve, a hydraulic continuously variable transmission (CVT), and a lifting cylinder. The gear pump is connected to the hydraulic CVT. The oil inlet of the torque amplifier is connected to the hydraulic oil tank through a first oil inlet pipeline, and the oil return port of the torque amplifier is connected to the hydraulic oil tank through a first oil return pipeline. The oil inlet of the control valve is connected to the hydraulic oil tank through a second oil inlet pipeline. The control valve is connected to the lifting cylinder. The oil return ports of the lifting cylinder and the control valve are connected to the hydraulic oil tank after replenishing oil to the CVT through the second oil return pipeline and the third oil return pipeline, respectively. A steering pump is provided on the first oil inlet pipeline, and a gear pump is provided on the second oil inlet pipeline.

[0006] The beneficial effects of this utility model are as follows: The hydraulic device for a rice transplanter of this utility model uses a steering pump to supply oil to the torque amplifier separately, which can separate the steering hydraulic system of the rice transplanter from the working system, and can quickly and accurately determine the fault; moreover, it uses an independent hydraulic oil tank for oil supply, which can solve the cleanliness problem, reduce the system failure rate, and at the same time, can accurately determine the faulty component, reduce the labor intensity of market service personnel and improve product operation efficiency.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the steering pump and the gear pump have the same structure.

[0009] Furthermore, the control valve is connected to and communicates with the rod chamber of the lifting cylinder via a control pipeline, and the rodless chamber of the lifting cylinder is connected to and communicates with the oil inlet of the hydraulic continuously variable transmission via a second return oil pipeline.

[0010] Furthermore, the return port of the control valve is connected to and communicates with the second return line through the third return line.

[0011] Furthermore, the return port of the hydraulic continuously variable transmission is connected to the hydraulic oil tank through a fourth return oil line.

[0012] This utility model also provides a rice transplanter, including a hydraulic device for a rice transplanter as described above, and an engine, wherein the engine is connected to the hydraulic continuously variable transmission and the steering pump respectively through a double-groove pulley and a transmission belt.

[0013] The beneficial effects of this utility model are: the rice transplanter of this utility model has an engine that can provide power to both the hydraulic continuously variable transmission and the steering pump.

[0014] Furthermore, the hydraulic continuously variable transmission is equipped with a double-groove pulley, the engine is connected to the double-groove pulley via a first transmission belt, and the double-groove pulley is also connected to the steering pump via a second transmission belt.

[0015] Furthermore, it also includes a gearbox, on which the torque amplifier, gear pump and hydraulic continuously variable transmission are all mounted, and the hydraulic oil tank is located outside the gearbox.

[0016] The beneficial effects of adopting the above-mentioned further solution are as follows: By setting up a gearbox and placing the hydraulic oil tank outside the gearbox, and using a separate hydraulic oil tank to supply oil to the hydraulic device of the rice transplanter, the cleanliness problem can be solved, the system failure rate can be reduced, and the faulty component can be accurately identified. This also reduces the labor intensity of market service personnel and improves product operation efficiency. Furthermore, it also includes a front axle and a rear axle, with the gearbox mounted on the front axle and the lifting cylinder mounted on the rear axle.

[0017] Furthermore, it also includes an insertion mechanism, wherein the hydraulic rod of the lifting cylinder is connected to the insertion mechanism. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the structural principle of the hydraulic device in an existing rice transplanter. Figure 2 This is a schematic diagram illustrating the structural principle of the hydraulic device for the rice transplanter of this utility model; Figure 3 This is a schematic diagram illustrating the structural principle of the hydraulic device of the rice transplanter as assembled in the rice transplanter.

[0019] The attached diagram lists the components represented by each number as follows: 1. Hydraulic oil tank; 2. Steering pump; 3. Torque amplifier; 4. Gear pump; 5. Control valve; 6. Hydraulic continuously variable transmission (CVT); 7. Lifting cylinder; 8. First oil inlet line; 9. Second oil inlet line; 10. First oil return line; 11. Second oil return line; 12. Third oil return line; 13. Fourth oil return line; 14. Control line; 15. Engine; 16. Double groove pulley; 17. First drive belt; 18. Second drive belt; 19. Gearbox; 20. Front axle; 21. Rear axle; 22. Insertion mechanism; 23. Suction filter. Detailed Implementation

[0020] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] Example 1 like Figure 2 As shown, a hydraulic device for a rice transplanter in this embodiment includes a hydraulic oil tank 1, a steering pump 2, a torque amplifier 3, a gear pump 4, a control valve 5, a hydraulic continuously variable transmission (CVT) 6, and a lifting cylinder 7. The gear pump 4 is connected to the hydraulic CVT 6. The oil inlet of the torque amplifier 3 is connected to the hydraulic oil tank 1 through a first oil inlet line 8, and the oil return port of the torque amplifier 3 is connected to the hydraulic oil tank 1 through a first oil return line 10. The oil inlet of the control valve 5 is connected to the hydraulic oil tank 1 through a second oil inlet line 9, and the control valve 5 is connected to the lifting cylinder 7. The oil return ports of the lifting cylinder 7 and the control valve 5 are connected to the hydraulic oil tank 1 after replenishing the hydraulic CVT 6 through a second oil return line 11 and a third oil return line 12, respectively. The steering pump 2 is installed on the first oil inlet line 8, and the gear pump 4 is installed on the second oil inlet line 9.

[0022] Specifically, the steering pump 2 and gear pump 4 described in this embodiment have the same structure.

[0023] like Figure 2 As shown, in a specific embodiment, the control valve 5 is connected to and communicates with the rod chamber of the lifting cylinder 7 through the control pipeline 14, and the rodless chamber of the lifting cylinder 7 is connected to and communicates with the oil inlet of the hydraulic continuously variable transmission 6 through the second return oil pipeline 11.

[0024] like Figure 2 As shown, in one specific embodiment, the return port of the control valve 5 is connected to and communicates with the second return line 11 via the third return line 12. The return port of the hydraulic continuously variable transmission 6 is communicated with the hydraulic oil tank 1 via the fourth return line 13.

[0025] In this embodiment, the normal operating system of a rice transplanter hydraulic device first draws oil from the hydraulic oil tank 1 to the inlet of the gear pump 4. High-pressure oil flows from the outlet of the gear pump 4 to the control valve 5, then into the lifting cylinder 7, and finally returns to the hydraulic continuously variable transmission 6, thus achieving the lifting, lowering, and movement of the rice transplanter. In this embodiment, the steering system of the rice transplanter hydraulic device draws oil from the newly added hydraulic oil tank 1 to the inlet of the steering pump 2, directly supplying oil to the torque amplifier 3. The torque amplifier 3 returns oil to the hydraulic oil tank 1. This embodiment eliminates the oil suction filter 23; if the lifting cylinder 7 fails to lift, it can be determined that the control valve 5 is malfunctioning.

[0026] This embodiment of a rice transplanter hydraulic device utilizes a steering pump to supply oil to the torque amplifier separately, which can separate the rice transplanter steering hydraulic system from the working system, allowing for quick and accurate fault diagnosis. Furthermore, the use of an independent hydraulic oil tank for oil supply solves the cleanliness problem, reduces the system failure rate, and enables accurate identification of faulty components, thereby reducing the workload of market service personnel and improving product operation efficiency.

[0027] Example 2 like Figure 2 and Figure 3 As shown, a rice transplanter of this embodiment includes a hydraulic device as described in Embodiment 1, and also includes an engine 15. The engine 15 is connected to the hydraulic continuously variable transmission 6 and the steering pump 2 via a double-groove pulley 16 and a transmission belt, respectively. In this embodiment, the engine can provide power to both the hydraulic continuously variable transmission and the steering pump.

[0028] like Figure 3As shown, in a preferred embodiment, the hydraulic continuously variable transmission 6 is equipped with a double-groove pulley 16, the engine 15 is connected to the double-groove pulley 16 via a first transmission belt 17, and the double-groove pulley 16 is also connected to the steering pump 2 via a second transmission belt 18.

[0029] Specifically, the rice transplanter in this embodiment also includes a gearbox 19. The torque amplifier 3, gear pump 4, and hydraulic continuously variable transmission 6 are all mounted on the gearbox 19, and the hydraulic oil tank 1 is located outside the gearbox 19. By setting up a gearbox and placing the hydraulic oil tank outside the gearbox, a separate hydraulic oil tank is used to supply oil to the hydraulic system of the rice transplanter. This solves the cleanliness problem, reduces the system failure rate, and allows for accurate identification of faulty components, reducing the labor intensity of market service personnel and improving product operation efficiency. More specifically, the rice transplanter in this embodiment also includes a front axle 20 and a rear axle 21, with the gearbox 19 mounted on the front axle 20 and the lifting cylinder 7 mounted on the rear axle 21.

[0030] More specifically, this embodiment also includes an insertion mechanism 22, and the oil rod of the lifting cylinder 7 is connected to the insertion mechanism 22.

[0031] In this embodiment, the gearbox, torque amplifier, engine, hydraulic continuously variable transmission, lifting cylinder, planting mechanism, control valve and other functional components are all commonly used components of rice transplanters.

[0032] This embodiment of a rice transplanter separates the hydraulic lines of the working hydraulic system and the steering hydraulic system, and uses hydraulic oil from an independent hydraulic oil tank instead of the hydraulic oil source of the gearbox three-way oil. This eliminates the absorption rate, greatly improves the cleanliness of the hydraulic system oil, reduces the failure rate of hydraulic components, and can also quickly and accurately identify the faulty component.

[0033] In the description of this utility model, it should be understood that the terms "front" and "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydraulic device for a rice transplanter, characterized in that, The system includes a hydraulic oil tank, a steering pump, a torque amplifier, a gear pump, a control valve, a hydraulic continuously variable transmission (CVT), and a lifting cylinder. The gear pump is connected to the CVT. The torque amplifier's inlet is connected to the hydraulic oil tank via a first inlet line, and its return port is also connected to the hydraulic oil tank via a first return line. The control valve's inlet is connected to the hydraulic oil tank via a second inlet line, and the control valve is connected to the lifting cylinder. The return ports of the lifting cylinder and the control valve replenish the CVT's oil supply via second and third return lines, respectively, before connecting to the hydraulic oil tank. A steering pump is installed on the first inlet line, and a gear pump is installed on the second inlet line.

2. The hydraulic device for a rice transplanter according to claim 1, characterized in that, The steering pump and gear pump have the same structure.

3. The hydraulic device for a rice transplanter according to claim 1, characterized in that, The control valve is connected to and communicates with the rod chamber of the lifting cylinder via a control pipeline, and the rodless chamber of the lifting cylinder is connected to and communicates with the oil inlet of the hydraulic continuously variable transmission via a second return oil pipeline.

4. The hydraulic device for a rice transplanter according to claim 3, characterized in that, The return port of the control valve is connected to and in communication with the second return pipeline through the third return pipeline.

5. The hydraulic device for a rice transplanter according to claim 3, characterized in that, The return port of the hydraulic continuously variable transmission is connected to the hydraulic oil tank through a fourth return oil line.

6. A rice transplanter, characterized in that, The device includes a hydraulic system for a rice transplanter as described in any one of claims 1 to 5, and further includes an engine, which is connected to the hydraulic continuously variable transmission and the steering pump via a double-groove pulley and a drive belt, respectively.

7. A rice transplanter according to claim 6, characterized in that, The hydraulic continuously variable transmission is equipped with a double-groove pulley. The engine is connected to the double-groove pulley via a first transmission belt. The double-groove pulley is also connected to the steering pump via a second transmission belt.

8. A rice transplanter according to claim 6, characterized in that, It also includes a gearbox, on which the torque amplifier, gear pump and hydraulic continuously variable transmission are all mounted, and the hydraulic oil tank is located outside the gearbox.

9. A rice transplanter according to claim 8, characterized in that, It also includes a front axle and a rear axle, with the gearbox mounted on the front axle and the lifting cylinder mounted on the rear axle.

10. A rice transplanter according to claim 6, characterized in that, It also includes an insertion mechanism, wherein the hydraulic rod of the lifting cylinder is connected to the insertion mechanism.

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