Rotary cultivator hydraulic system and rotary cultivator

Abstract

The utility model provides a rotary cultivator hydraulic system and a rotary cultivator, which comprise a master control system, a steering control unit and a machine tool control unit, and the machine tool control unit and the steering control unit are arranged in parallel. The machine tool control unit comprises a field flattening machine telescopic subsystem, a field flattening machine lifting subsystem, a rotary cultivator lifting subsystem and a horizontal adjusting subsystem which are arranged in parallel. According to the hydraulic system of the rotary cultivator and the rotary cultivator, different choices of natural descending and forced descending can be achieved, the rotary cultivator can descend more smoothly, meanwhile, the hydraulic system of the rotary cultivator is optimized, the situation that trenches are different in depth after the ground with different flatness is cultivated is improved, and follow-up crop growth is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to a rotary tiller hydraulic system and a rotary tiller. Background Art

[0002] In the development of modern agriculture, highly automated agriculture is also gradually developing and improving. Improving the simplicity of agricultural machinery operation and meeting the diverse operational needs of users is also one of the areas of gradual optimization in the field of agricultural machinery development. The hydraulic systems of relevant rotary tillers have various issues that need to be optimized. The hydraulic operating system is insufficient to meet the diverse user needs. For one thing, in the hydraulic control system before the improvement, the hydraulic cylinder of the machine that extends and retracts upward and downward could not smoothly lower, affecting user experience. For another, due to the complex road surface of the working fields, the horizontal angle between the rotary tiller and the ground often varies greatly in different fields, resulting in inconsistent trench depths after tilling, which affects subsequent crop growth.

[0003] Therefore, it is necessary to provide a rotary tiller hydraulic system and a rotary tiller to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of the utility model is to provide a rotary tiller hydraulic system and a rotary tiller. By optimizing the design of the hydraulic system, different modes of natural contraction and forced contraction of the machine can be selected, the descent is smoother, and the machine is better suitable for uneven cultivated land.

[0005] According to one aspect of the present invention, a rotary tiller hydraulic system is provided, comprising a general control system, a steering control unit, and an implement control unit, wherein the general control system comprises an oil tank for providing hydraulic oil, the steering control unit comprises a first oil return line connected to the oil tank, and a first oil inlet line connected to the general control system for controlling the steering of the rotary tiller, the implement control unit comprises a second oil return line connected to the oil tank, and a second oil inlet line connected to the general control system for controlling the operation of the rotary tiller, the implement control unit and the steering control unit are arranged in parallel, the implement control unit comprises a field leveling machine telescopic subsystem, a field leveling machine lifting subsystem, a rotary tiller lifting subsystem, and a horizontal adjustment subsystem, wherein the field leveling machine telescopic subsystem, the field leveling machine lifting subsystem, the rotary tiller lifting subsystem, and the horizontal adjustment subsystem are arranged in parallel. The present application realizes the selection of different modes of natural contraction and forced contraction of the implement, making the descent smoother and avoiding the situation where it cannot be completely descended to the contracted position. At the same time, the present application can better adjust the horizontal angle between the rotary tiller and the ground, thereby better realizing rotary tillage operations in trenches of different depths and providing good arable land conditions for subsequent crop growth.

[0006] The utility model provides a rotary tiller hydraulic system, which realizes that a steering control unit and a machine control unit are arranged in the same hydraulic system, thereby facilitating integrated control and improving the functional diversity of the hydraulic control.

[0007] Preferably, the first oil return circuit and the second oil return circuit are connected to the oil return circuit of the oil tank.

[0008] Preferably, the rotary tiller lifting subsystem includes:

[0009] The rotary tiller lifting oil inlet circuit is connected to the second oil inlet circuit;

[0010] The first three-position four-way valve is connected to the rotary tiller lifting oil inlet circuit and the second oil return circuit;

[0011] H1 oil cylinder, H1 oil cylinder is connected to the first three-position four-way valve, H1 oil cylinder includes a rodless chamber and a rod chamber;

[0012] H2 oil cylinder, H2 oil cylinder is arranged in parallel with H1 oil cylinder, H2 oil cylinder includes a rodless cavity and a rod cavity;

[0013] A first hydraulically controlled one-way valve is connected to the oil path between the first three-position four-way valve and the rodless chambers of the h1 and h2 oil cylinders;

[0014] A second hydraulically controlled one-way valve is connected to the oil path between the first three-position four-way valve and the rod chambers of the h1 and h2 oil cylinders;

[0015] A two-position, three-way valve is connected to the oil line between the second hydraulically controlled one-way valve and the rod chambers of the H1 and H2 cylinders. This application allows users to choose whether to force or allow the cylinders to retract naturally, depending on their needs and actual conditions. This allows users to choose whether to force or allow the rotary tiller to descend naturally, while also avoiding issues with unsmooth or incomplete natural descent.

[0016] Preferably, the two-position three-way valve includes a first position and a second position:

[0017] When the two-position three-way valve is in the first position, the first three-position four-way valve controls the hydraulic oil in the rod chamber or rodless chamber of the h1 oil cylinder and the h2 oil cylinder to realize forced control of the rotary tiller to descend or ascend;

[0018] When the two-position three-way valve is in the second position, the natural descent of the rotary tiller is achieved by controlling the hydraulic oil in the rod chambers of the h1 oil cylinder and the h2 oil cylinder through the first, third and fourth-way valves.

[0019] Preferably, the first hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0020] Preferably, the second hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0021] Preferably, the rotary tiller lifting subsystem also includes a first oil circuit, a first branch, a second oil circuit, and a second branch. The oil inlet of the first hydraulically controlled one-way valve is connected to the first three-position four-way valve through the first oil circuit, and the oil outlet of the first hydraulically controlled one-way valve is connected to the rodless cavity of the h1 oil cylinder and the h2 oil cylinder. The control oil port of the first hydraulically controlled one-way valve is connected to the second oil circuit through the second branch; the oil inlet of the second hydraulically controlled one-way valve is connected to the first three-position four-way valve through the second oil circuit, and the oil outlet of the second hydraulically controlled one-way valve is connected to the rod cavity of the h1 oil cylinder and the h2 oil cylinder. The control oil port of the second hydraulically controlled one-way valve is connected to the first oil circuit through the first branch.

[0022] Preferably, the level adjustment subsystem includes:

[0023] A horizontal adjustment oil inlet passage, the horizontal adjustment oil inlet passage is connected to the second oil inlet passage;

[0024] The second three-position four-way valve is connected to the rotary tiller lifting oil inlet circuit and the second oil return circuit;

[0025] H3 oil cylinder, H3 oil cylinder is connected to the second three-position four-way valve, including a rodless chamber and a rod chamber;

[0026] A third hydraulically controlled one-way valve is connected to the oil path between the second three-position four-way valve and the rodless chamber of the h3 oil cylinder;

[0027] A fourth hydraulically controlled one-way valve is connected to the oil path between the second three-position four-way valve and the rod chamber of the h3 oil cylinder; preferably, the third hydraulically controlled one-way valve includes an oil inlet, an oil outlet, and a control oil port;

[0028] Preferably, the fourth hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0029] Preferably, the horizontal adjustment subsystem also includes a third oil circuit, a third branch, a fourth oil circuit, and a fourth branch. The oil inlet of the third hydraulically controlled one-way valve is connected to the second three-position four-way valve through the third oil circuit, the oil outlet of the third hydraulically controlled one-way valve is connected to the rodless chamber of the h3 oil cylinder, and the control oil port of the third hydraulically controlled one-way valve is connected to the fourth oil circuit through the fourth branch; the oil inlet of the fourth hydraulically controlled one-way valve is connected to the second three-position four-way valve through the fourth oil circuit, the oil outlet of the fourth hydraulically controlled one-way valve is connected to the rod chamber of the h3 oil cylinder, and the control oil port of the fourth hydraulically controlled one-way valve is connected to the third oil circuit through the third branch.

[0030] Preferably, the telescopic subsystem of the leveling machine includes:

[0031] The telescopic oil inlet of the leveling machine is connected to the second oil inlet;

[0032] The third three-position four-way valve is connected to the telescopic oil inlet circuit of the flat machine and the second oil return circuit;

[0033] H4 oil cylinder, H4 oil cylinder is connected to the second three-position four-way valve, including a rodless chamber and a rod chamber;

[0034] H5 oil cylinder, H5 oil cylinder is arranged in parallel with H4 oil cylinder, including a rodless cavity and a rod cavity;

[0035] The fifth hydraulically controlled one-way valve is connected to the oil path between the third three-position four-way valve and the rodless chambers of the H4 and H5 oil cylinders;

[0036] The sixth hydraulically controlled one-way valve is connected to the oil circuit between the third three-position four-way valve and the rod chambers of the h4 and h5 cylinders.

[0037] Preferably, the fifth hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0038] Preferably, the sixth hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0039] Preferably, the telescopic subsystem of the leveling machine also includes a fifth oil circuit, a fifth branch, a sixth oil circuit, and a sixth branch. The oil inlet of the fifth hydraulically controlled one-way valve is connected to the third three-position four-way valve through the fifth oil circuit, and the oil outlet of the fifth hydraulically controlled one-way valve is connected to the rodless cavity of the h4 oil cylinder and the h5 oil cylinder, and the control oil port of the fifth hydraulically controlled one-way valve is connected to the sixth oil circuit through the sixth branch; the oil inlet of the sixth hydraulically controlled one-way valve is connected to the third three-position four-way valve through the sixth oil circuit, and the oil outlet of the fourth hydraulically controlled one-way valve is connected to the rod cavity of the h4 oil cylinder and the h5 oil cylinder, and the control oil port of the sixth hydraulically controlled one-way valve is connected to the fifth oil circuit through the fifth branch.

[0040] The design of the telescopic subsystem of the field leveler helps to achieve the extension and contraction of the field leveler implements, and better realize the tillage operation and the operation of the crawler machine.

[0041] Preferably, the leveling machine lifting subsystem includes:

[0042] The oil inlet line for lifting the field leveler is connected to the second oil inlet line;

[0043] The fourth three-position four-way valve is connected to the oil inlet line of the flat machine and the second oil return line;

[0044] H6 oil cylinder, H6 oil cylinder is connected to the fourth three-position four-way valve, including a rodless chamber and a rod chamber;

[0045] H7 oil cylinder, H7 oil cylinder is arranged in parallel with H6 oil cylinder, including rodless cavity and rod cavity;

[0046] The seventh hydraulically controlled one-way valve is connected to the oil path between the fourth three-position four-way valve and the rodless chambers of the H6 and H7 oil cylinders;

[0047] The eighth hydraulically controlled one-way valve is connected to the oil circuit between the fourth three-position four-way valve and the rod chambers of the h6 and h7 cylinders.

[0048] Preferably, the seventh hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0049] Preferably, the eighth hydraulically controlled one-way valve includes an oil inlet, an oil outlet and a control oil port;

[0050] Preferably, the leveling machine lifting subsystem also includes a seventh oil circuit, a seventh branch, an eighth oil circuit, and an eighth branch. The oil inlet of the seventh hydraulically controlled one-way valve is connected to the fourth three-position four-way valve through the seventh oil circuit, the oil outlet of the seventh hydraulically controlled one-way valve is connected to the rodless chamber of the h1 cylinder, and the control oil port of the seventh hydraulically controlled one-way valve is connected to the eighth oil circuit through the eighth branch; the oil inlet of the eighth hydraulically controlled one-way valve is connected to the fourth three-position four-way valve through the eighth oil circuit, the oil outlet of the fourth hydraulically controlled one-way valve is connected to the rod chamber of the h1 cylinder, and the control oil port of the eighth hydraulically controlled one-way valve is connected to the seventh oil circuit through the seventh branch.

[0051] The design of the lifting subsystem of the field leveler helps to realize the lifting of the field leveler implements, and better realize the tillage operation and the operation of the crawler machine.

[0052] Preferably, the feature of the overall control system is that it further comprises: a gear pump connected to the oil tank;

[0053] A coarse filter is placed between the oil tank and the gear pump and is connected to the oil tank and the gear pump;

[0054] Fine filter, the fine filter is connected to the gear pump;

[0055] A diverter valve, one end of the diverter valve is connected to the fine filter, and the other end is connected to the first oil inlet and the second oil inlet, the first oil inlet is connected to the steering control unit, and the second oil inlet is connected to the tool control unit;

[0056] Solenoid main valve, one end of the solenoid main valve is connected to the diverter valve, and the other end is connected to the oil tank;

[0057] A first overflow valve is further provided between the diverter valve and the fine filter oil circuit, and the first overflow valve is communicated with the oil tank.

[0058] Preferably, the steering control unit includes: a five-position five-way valve connected to the first oil inlet, a left-turn cylinder connected to the five-position five-way valve, a right-turn cylinder arranged in parallel with the left-turn cylinder, and a second overflow valve with one end connected between the five-position five-way valve and the diverter valve and the other end connected to the oil tank, and the right-turn cylinder is connected to the five-position five-way valve.

[0059] Preferably, the five-position five-way valve includes a neutral position, a left turn position, a left turn throttling position, a right turn position and a right turn throttling position: when the five-position five-way valve is in the neutral position, the five-way oil circuits are interconnected, and the hydraulic oil returns directly to the oil tank after passing through the five-position five-way valve; when the five-position five-way valve is in the left turn position, the hydraulic oil enters the left turn cylinder after passing through the left turn oil circuit of the five-position five-way valve. When the piston rod of the left turn cylinder reaches the set stroke, the hydraulic oil returns to the five-position five-way valve through the oil return port of the left turn cylinder and returns to the oil tank through the five-position five-way valve; when the five-position five-way valve is in the left turn throttling position When the five-position five-way valve is in the right turn position, the flow direction of the hydraulic oil is the same as that of the left turn position, the flow rate decreases, and the movement speed of the piston rod of the left turn cylinder slows down; when the five-position five-way valve is in the right turn position, the hydraulic oil passes through the right turn oil circuit of the five-position five-way valve and enters the right turn cylinder. When the piston rod of the right turn cylinder reaches the set stroke, the hydraulic oil returns to the five-position five-way valve through the return oil port of the right turn cylinder, and returns to the oil tank through the five-position five-way valve; when the five-position five-way valve is in the right turn throttling position, the flow direction of the hydraulic oil is the same as that of the right turn position, the flow rate decreases, and the movement speed of the piston rod of the right turn cylinder slows down.

[0060] Preferably, the rotary tiller lifting subsystem also includes a one-way valve connected between the first hydraulically controlled one-way valve and the rodless chamber of the h2 oil cylinder, and a throttle valve arranged in parallel with the one-way valve. This application allows for the selective addition of one-way and throttle valves based on load, ensuring that the oil cylinder can be properly extended and retracted, facilitating smooth lifting of the rotary tiller. Similarly, the addition of one-way and throttle valves can also be selected for other hydraulic sub-control systems.

[0061] Preferably, the leveling machine lifting subsystem also includes a one-way valve connected between the seventh hydraulically controlled one-way valve and the rodless chamber of the H6 oil cylinder, and a throttle valve arranged in parallel with the one-way valve. This application allows for the selective addition of one-way and throttle valves based on load, ensuring the cylinder can extend and retract normally, facilitating smooth lifting and lowering of the leveling machine.

[0062] Preferably, a quick-change connector is provided between the rodless chamber of the H3 oil cylinder and the third hydraulically controlled one-way valve, and a quick-change connector is provided between the rod chamber of the H3 oil cylinder and the fourth hydraulically controlled one-way valve. By providing quick-change connectors in this application, sub-control oil circuit systems with different functions can be added according to user needs, which is beneficial for improving the realization of multiple functions of the rotary tiller and enhancing the practicality of the rotary tiller.

[0063] Preferably, a quick-change joint is provided between the rodless chamber of the h4 oil cylinder and the h5 oil cylinder and the fifth hydraulically controlled one-way valve, and a quick-change joint is provided between the rod chamber of the h4 oil cylinder and the h5 oil cylinder and the sixth hydraulically controlled one-way valve.

[0064] Preferably, a quick-change joint is provided between the rodless chamber of the h6 oil cylinder and the h7 oil cylinder and the seventh hydraulically controlled one-way valve, and a quick-change joint is provided between the rod chamber of the h6 oil cylinder and the h7 oil cylinder and the eighth hydraulically controlled one-way valve.

[0065] Preferably, the first three-position four-way valve includes a neutral position, a rising position, a falling position, an oil inlet, an oil return port, a first execution port, and a second execution port.

[0066] Preferably, the two-position three-way valve includes a first position and a second position, and the two-position three-way valve includes a first working port, a second working port and a third working port.

[0067] Preferably, when the two-position three-way valve is in the first state and when the first-position four-way valve is in the descending position, the hydraulic oil flows out from the machine oil circuit through the oil inlet of the first-position four-way valve and the second execution port. At this time, a part of the hydraulic oil reaches the second hydraulically controlled one-way valve through the second oil circuit to open the second hydraulically controlled one-way valve, and the other part reaches the first hydraulically controlled one-way valve through the second branch to open the first hydraulically controlled one-way valve. The hydraulic oil through the second hydraulically controlled one-way valve reaches the rod chamber of the h1 cylinder and the h2 cylinder through the first working port and the second working port. The hydraulic oil in the rodless chamber of the h1 cylinder and the h2 cylinder flows to the oil tank through the throttle valve, the first hydraulically controlled one-way valve, the first execution port and the return oil port. The h1 cylinder and the h2 cylinder contract, thereby driving the rotary tiller to naturally descend by gravity or spring force.

[0068] Preferably, when the two-position three-way valve is in the second position, and when the first-position four-way valve is in the descending position, the hydraulic oil flows out from the tool oil circuit through the oil inlet of the first-position four-way valve and the second execution port. At this time, a part of the hydraulic oil reaches the second hydraulically controlled one-way valve through the second oil circuit to open the second hydraulically controlled one-way valve, and the other part reaches the first hydraulically controlled one-way valve through the second branch to open the first hydraulically controlled one-way valve. After the hydraulic oil reaches the first working port through the second hydraulically controlled one-way valve, it does not circulate with the rod chamber of the h2 cylinder. The hydraulic oil in the rodless chamber of the h1 cylinder and the h2 cylinder passes through the throttle valve, the first hydraulically controlled one-way valve, the first execution port, and the return oil port to the oil tank. At the same time, due to the effect of negative pressure, the hydraulic oil in the oil tank is sucked into the rod chamber of the h1 cylinder and the h2 cylinder through the third working port, thereby forcing the rotary tiller to descend.

[0069] Preferably, the implement control unit includes a field leveler telescopic subsystem, a field leveler lifting subsystem, a rotary tiller lifting subsystem and a horizontal adjustment subsystem arranged in parallel, and the cylinder in each control oil circuit can be a single-acting cylinder or a double-acting cylinder.

[0070] Preferably, a rotary tiller including the above-mentioned rotary tiller hydraulic system includes a rotary tiller and a connecting frame assembly, the connecting frame assembly includes a horizontal pull rod, an upper connecting frame, an h1 oil cylinder, an h3 oil cylinder, an lower connecting rod, and a horizontal pull rod, the two ends of the horizontal pull rod are respectively connected to the rotary tiller and the rotary tiller upper connecting frame and the rotary tiller, one end of the h1 oil cylinder and the h2 oil cylinder is connected to the upper connecting frame, and the other end is connected to the rotary tiller to realize the lifting of the rotary tiller, one end of the lower connecting rod is connected to the rotary tiller and the other end is connected to the rotary tiller, one end of the horizontal pull rod is connected to the upper connecting frame and the other end is connected to the bottom, one end of the vertical pull rod is connected to the upper connecting frame and the other end is connected to the lower connecting rod; one end of the h3 oil cylinder is connected to the upper connecting frame and the other end is connected to the bottom, the h3 oil cylinder and the horizontal pull rod are arranged relatively to each other along the left and right sides of the rotary tiller, and the h3 oil cylinder can be extended and retracted along the up and down direction of the rotary tiller to adjust the horizontal inclination angle of the rotary tiller. Through this application, the horizontal distance of one end of the rotary tiller relative to the ground can be kept unchanged, while the horizontal distance of the other end relative to the ground can be adjusted. When the ground is uneven, the horizontal angle between the rotary tiller and the ground can be better adjusted, thereby better realizing rotary tillage operations in trenches of different depths and providing good arable land conditions for subsequent crop growth.

[0071] Preferably, the rotary tiller includes a first connecting portion, a second connecting portion, and a third connecting portion, wherein the first connecting portion is connected to one end of the horizontal pull rod, the lower connecting rods include two arranged on the left and right, and the second connecting portion and the third connecting portion are respectively connected to one end of the two lower connecting rods. Through this application, a three-point suspension connection between the rotary tiller and the entire machine is achieved, which is more concise and flexible.

[0072] Preferably, a rotary tiller is provided, comprising the rotary tiller hydraulic system of the above-mentioned solution.

[0073] The utility model provides a hydraulic system for a rotary tiller, including a general control system, a steering control unit, and an implement control unit. The implement control unit includes a field leveler telescopic subsystem, a field leveler lifting subsystem, a rotary tiller lifting subsystem, and a horizontal adjustment subsystem arranged in parallel. The hydraulic system of the present application can achieve different options of natural descent and forced descent by reasonably designing the rotary tiller lifting subsystem, which helps the rotary tiller to descend more smoothly. At the same time, the present application can better adjust the horizontal angle between the rotary tiller and the ground, improve the situation of different depths of trenches after tilling land with different flatness, thereby better realizing rotary tillage operations in trenches of different depths, and providing good arable land conditions for subsequent crop growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0075] Figure 1 This is the hydraulic principle diagram of the rotary tiller hydraulic system;

[0076] Figure 2 This is the hydraulic principle diagram of the rotary tiller lifting subsystem in the natural descending state;

[0077] Figure 3 for Figure 1 A partial enlarged view of the principle diagram of the rotary tiller hydraulic system;

[0078] Figure 4 This is the hydraulic principle diagram of the rotary tiller lifting subsystem in the forced descent state;

[0079] Figure 5 It is a structural diagram of a rotary tillage implement and a connecting frame assembly;

[0080] Figure 6 This is an overall schematic diagram of a rotary tiller.

[0081] Description of Figure Numbers:

[0082] 10. Overall control system; 20. Steering control unit; 30. Implement control unit; 31. Rotary tiller lifting subsystem; 32. Leveling subsystem; 33. Field leveler telescopic subsystem; 34. Field leveler lifting subsystem; 101. Fuel tank; 102. Gear pump; 103. Coarse filter; 104. Fine filter; 105. First relief valve; 106. Solenoid main valve; 107. Diverter valve; 201. Five-position five-way valve; 202. Second relief valve; 203. Right-turn cylinder; 204. Left-turn cylinder; 31. 1. First, three-position, four-way valve; 312, h1 cylinder; 313, h2 cylinder; 314, two-position, three-way valve; 321, second, three-position, four-way valve; 322, h3 cylinder; 331, third, three-way valve; 332, h4 cylinder; 333, h5 cylinder; 341, fourth, three-way valve; 342, h6 cylinder; 343, h7 cylinder; Y1, first hydraulically controlled one-way valve; Y2, second hydraulically controlled one-way valve; Y3, third hydraulically controlled one-way valve; Y4, fourth hydraulically controlled one-way valve; Y5, fifth hydraulically controlled one-way valve; Y6, sixth hydraulically controlled one-way valve; Y7, seventh hydraulically controlled one-way valve; Y8, eighth hydraulically controlled one-way valve; Z1, one-way valve; Z2, throttle valve; W, rodless chamber; V, rod chamber; K, quick-change connector; P1, oil inlet; T1, oil return port; A, first execution port; B, second execution port; D1, first working port; D2, second working port; D3, third working port; Pz, first oil inlet; P0, second oil inlet; P01, rotary tiller lifting oil inlet; P02, leveling oil inlet; P03, field leveler telescopic Oil inlet; P04, leveling machine lifting oil inlet; Tz, first oil return; T0, second oil return; P, oil inlet; T, oil return; A1, first oil circuit; A2, first branch; A3, third oil circuit; A4, third branch; A5, fifth oil circuit; A6, fifth branch; A7, seventh oil circuit; A8, seventh branch; B1, second oil circuit; B2, second branch; B3, fourth oil circuit; B4, fourth branch; B5, sixth oil circuit; B6, sixth branch; B7, eighth oil circuit; B8, eighth branch.

[0083] 40. Rotary tiller; 41. First connecting part; 42. Second connecting part; 43. Third connecting part; 50. Connecting frame assembly; 51. Upper connecting frame; 52. Lower connecting rod; 53. Horizontal pull rod; 100. Rotary tiller hydraulic system; 200. Rotary tiller. DETAILED DESCRIPTION

[0084] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0085] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0086] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0087] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0088] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0089] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0090] The embodiment for implementing the present application is described based on the accompanying drawings. It should be noted that in the following description, the direction of F is set to the front of the rotary tiller (refer to Figure 5 and Figure 6 ), set the direction of B to the rear of the rotary tiller (refer to Figure 5 and Figure 6 ), set the direction of L to "left of the rotary tiller (refer to Figure 5 ), set the direction of R to the right of the rotary tiller (refer to Figure 5 ).

[0091] See also Figure 1As shown, this embodiment provides a rotary tiller hydraulic system 100, including a general control system 10, a steering control unit 20, and an implement control unit 30. The general control system 10 includes a fuel tank 101 for providing hydraulic oil. The steering control unit 20 includes a first oil inlet Pz connected to the fuel tank 101 for controlling the steering of the rotary tiller 200, and a first oil return Tz connected to the fuel tank. The implement control unit 30 includes a second oil inlet P0 for controlling the operation of the rotary tiller 200, and a second oil return T0 connected to the fuel tank. The first oil return Tz and the second oil return T0 are connected to the oil return T of the fuel tank 101. The implement control unit 30 is arranged in parallel with the steering control unit 20. The implement control unit 30 includes a field leveling machine telescopic subsystem 33, a field leveling machine lifting subsystem 34, a rotary tiller lifting subsystem 31 and a horizontal adjustment subsystem 32 arranged in parallel. Through the rotary tiller hydraulic system 100 of the present application, different options of natural descent and forced descent can be realized, which helps the rotary tiller 200 to descend more smoothly. At the same time, through the present application, the horizontal angle between the rotary tiller 40 and the ground can be better adjusted, improving the situation of different depths of trenches after tilling the ground with different flatness, thereby better realizing rotary tillage operations in trenches of different depths and providing good arable land conditions for subsequent crop growth.

[0092] The rotary tiller hydraulic system 100 provided in this embodiment realizes that the steering control unit 20 and the implement control unit 30 are arranged in the same hydraulic system, which helps to realize integrated control and improve the convenience of hydraulic control.

[0093] The overall control system 10 also includes a gear pump 102, a coarse filter 103, a fine filter 104, a diverter valve 107, an electromagnetic main valve 106, and a first relief valve 105. The gear pump 102 is connected to the fuel tank 101, the coarse filter 103 is placed between the fuel tank 101 and the gear pump 102 and is connected to the fuel tank 101 and the gear pump 102, the fine filter 104 is connected to the gear pump 102, one end of the diverter valve 107 is connected to the fine filter 104 via an oil inlet P, and the other end is connected to the first oil inlet Pz and the second oil inlet P0 respectively. The first oil inlet Pz is connected to the steering control unit 20, and the second oil inlet P0 is connected to the tool control unit 30. One end of the electromagnetic main valve 106 is connected to the diverter valve 107 and the other end is connected to the fuel tank 101. A first relief valve 105 is also provided between the oil circuits of the diverter valve 107 and the fine filter 104, and the first relief valve 105 is in communication with the fuel tank 101.

[0094] This embodiment can better achieve the smoothness of the entire hydraulic system, which helps to prevent the problem of oil flow failure due to oil circuit abnormalities.

[0095] The steering control unit includes a five-position, five-way valve 201 connected to the first oil inlet Pz, a left-turn cylinder 204 connected to the five-position, five-way valve 201, a right-turn cylinder 203 arranged in parallel with the left-turn cylinder 204, and a second relief valve 202 with one end connected between the five-position, five-way valve 201 and the diverter valve 107 and the other end connected to the oil tank 101. The right-turn cylinder 203 is connected to the five-position, five-way valve 201. The steering control unit controls the rotary tiller 200 to turn left, turn right, or travel straight.

[0096] The five-position five-way valve 201 includes a neutral position, a left turn position, a left turn throttling position, a right turn position and a right turn throttling position: when the five-position five-way valve 201 is in the neutral position, the five-way oil circuits are interconnected, and the hydraulic oil directly returns to the oil tank 101 after passing through the five-position five-way valve 201; when the five-position five-way valve 201 is in the left turn position, the hydraulic oil passes through the left turn oil circuit of the five-position five-way valve 201 and enters the left turn cylinder 204. When the piston rod of the left turn cylinder 204 reaches the set stroke, the hydraulic oil returns to the five-position five-way valve 201 through the return oil port T1 of the left turn cylinder 204, and returns to the oil tank 101 through the five-position five-way valve 201; when the five-position five-way valve 201 is in the left turn position, the hydraulic oil passes through the left turn oil circuit of the five-position five-way valve 201 and enters the left turn cylinder 204. When the piston rod of the left turn cylinder 204 reaches the set stroke, the hydraulic oil returns to the five-position five-way valve 201 through the return oil port T1 of the left turn cylinder 204, and returns to the oil tank 101 through the five-position five-way valve 201; When the throttling position is set, the flow direction of the hydraulic oil is the same as that of the left turn position, the flow rate is reduced, and the movement speed of the piston rod of the left turn cylinder 204 is slowed down. When the five-position five-way valve 201 is in the right turn position, the hydraulic oil passes through the right turn oil circuit of the five-position five-way valve 201 and enters the right turn cylinder 203. When the piston rod of the right turn cylinder 203 reaches the set stroke, the hydraulic oil returns to the five-position five-way valve 201 through the oil return port T1 of the right turn cylinder 203, and then returns to the fuel tank 101 through the five-position five-way valve 201. When the five-position five-way valve 201 is in the right turn throttling position, the flow direction of the hydraulic oil is the same as that of the right turn position, the flow rate is reduced, and the movement speed of the piston rod of the right turn cylinder 203 is slowed down. Through this embodiment, the rotary tiller 200 can be selected to turn left or right smoothly, and the steering speed of the rotary tiller 200 can be better adjusted, thereby improving the user experience.

[0097] See also Figures 2 to 4As shown, the rotary tiller lifting subsystem 31 includes a first three-position four-way valve 311, an h1 oil cylinder 312, an h2 oil cylinder 313, a first hydraulically controlled one-way valve Y1, a second hydraulically controlled one-way valve Y2, and a two-position three-way valve 314. The first three-position four-way valve 311 is connected to the rotary tiller lifting oil inlet P01 and the second oil return T0. The h1 oil cylinder 312 is connected to the first three-position four-way valve 311. The h1 oil cylinder 312 includes a rodless chamber W and a rod chamber V. The h2 oil cylinder 313 is connected to the h1 oil cylinder 314. 2 are arranged in parallel. The h2 oil cylinder 313 includes a rodless chamber W and a rod chamber V. The first hydraulically controlled one-way valve Y1 is connected to the oil path between the first three-position four-way valve 311 and the rodless chambers W of the h1 oil cylinder 312 and the h2 oil cylinder 313. The second hydraulically controlled one-way valve Y2 is connected to the oil path between the first three-position four-way valve 311 and the rod chambers of the h1 oil cylinder and the h2 oil cylinder. The two-position three-way valve 314 is connected to the oil path between the second hydraulically controlled one-way valve Y2 and the rod chambers V of the h1 oil cylinder and the h2 oil cylinder. With this embodiment, the user can choose to force the oil cylinders to retract or allow them to retract naturally, thereby selecting whether to force or naturally lower the rotary tiller 40. This also avoids the problem of unsmooth or incomplete natural lowering.

[0098] The two-position three-way valve 314 includes a first position (unmarked) and a second position (unmarked): when the two-position three-way valve 314 is in the first position, the first three-position four-way valve 311 controls the hydraulic oil in the rod chamber V or rodless chamber W of the h1 cylinder 312 and the h2 cylinder 313 to achieve forced control of the rotary tiller 40 to descend or ascend; when the two-position three-way valve 314 is in the second position, the first three-position four-way valve 311 controls the hydraulic oil in the rod chamber V of the h1 cylinder 312 and the h2 cylinder 313 to achieve natural descent of the rotary tiller 40.

[0099] Through this embodiment, the user can choose to force the oil cylinder to contract or to allow the oil cylinder to contract naturally according to needs and actual conditions, thereby choosing whether to force the rotary tiller 40 to descend naturally or to descend naturally, while also avoiding the problem of the natural descent being not smooth or not being able to descend completely. The control scheme of the hydraulic system of the present application reduces the complexity of the hydraulic scheme, the control scheme is more concise, and the use of control elements is reduced, which helps to achieve better control effect of the rotary tiller, thereby realizing the smoothness of the rotary tiller hydraulic system and improving the convenience of rotary tiller operation. At the same time, it also realizes the diversity of user choices and is convenient for users to use.

[0100] The first hydraulically controlled one-way valve Y1 includes an oil inlet, an oil outlet and a control oil port, and the second hydraulically controlled one-way valve Y2 includes an oil inlet, an oil outlet and a control oil port.

[0101] The rotary tiller lifting subsystem 31 also includes a first oil circuit A1, a first branch A2, a second oil circuit B1, and a second branch B2. The oil inlet of the first hydraulically controlled one-way valve Y1 is connected to the first three-position four-way valve 311 through the first oil circuit A1, and the oil outlet of the first hydraulically controlled one-way valve is connected to the rodless chamber W of the h1 and h2 oil cylinders. The control oil port of the first hydraulically controlled one-way valve Y1 is connected to the second oil circuit B1 through the second branch B2. The oil inlet of the second hydraulically controlled one-way valve Y2 is connected to the first three-position four-way valve 311 through the second oil circuit B1, and the oil outlet of the second hydraulically controlled one-way valve Y2 is connected to the rod chamber V of the h1 and h2 oil cylinders. The control oil port of the second hydraulically controlled one-way valve Y2 is connected to the first oil circuit A1 through the first branch A2. This embodiment helps to simplify and smooth the hydraulic control scheme, reduce the complexity of the hydraulic system, and reduce the failure rate of the hydraulic control system.

[0102] The rotary tiller lifting subsystem 31 also includes a check valve Z1 connected between the first hydraulically controlled check valve Y1 and the rodless chamber W of the h2 oil cylinder 313, and a throttle valve Z2 arranged in parallel with the check valve Z1. This application allows for the selective addition of check valves Z1 and throttle valves Z2 based on load, ensuring proper extension and retraction of the oil cylinder, facilitating smooth raising and lowering of the rotary tiller 40. Similarly, the addition of check valves Z1 and throttle valves Z2 can be selected for other hydraulic sub-control systems. This simple and smooth control scheme reduces the complexity of the hydraulic system and minimizes the failure rate of the hydraulic control system.

[0103] The first three-position, four-way valve 311 includes a neutral position (unlabeled), an ascending position (unlabeled), a descending position (unlabeled), an oil inlet P1, an oil return port T1, a first actuating port A, and a second actuating port B. The oil inlet P1 is connected to the rotary tiller's lifting oil inlet line P01, the oil return port T1 is connected to the second oil return line T0, the first actuating port A is connected to the first hydraulically controlled one-way valve Y1, and the second actuating port B is connected to the second hydraulically controlled one-way valve Y2.

[0104] The two-position, three-way valve 314 includes a first position (not labeled) and a second position (not labeled). The valve 314 includes a first working port D1, a second working port D2, and a third working port D3. The first working port D1 is connected to the second hydraulically controlled one-way valve Y2, the second working port D2 is connected to the rod chambers V of the h1 and h2 cylinders, and the third working port D3 is connected to the oil tank 101.

[0105] When the two-position three-way valve 314 is in the first position (see Figure 2), when the first three-position four-way valve 311 is in the descending position, the hydraulic oil flows out from the tool oil circuit through the oil inlet P1 of the first three-position four-way valve 311 and the second execution port B. At this time, a part of the hydraulic oil reaches the second hydraulically controlled one-way valve Y2 through the second oil circuit B1 to open the second hydraulically controlled one-way valve Y2, and the other part reaches the first hydraulically controlled one-way valve Y1 through the second branch B2 to open the first hydraulically controlled one-way valve Y1. The hydraulic oil through the second hydraulically controlled one-way valve Y2 reaches the rod chamber V of the h1 cylinder 312 and the h2 cylinder 313 through the first working port D1 and the second working port D2. The hydraulic oil in the rodless chamber W of the h1 cylinder 312 and the h2 cylinder 313 passes through the throttle valve Z2, the first hydraulically controlled one-way valve Y1, the first execution port A and the return oil port T1 to the oil tank 101. The h1 cylinder 312 and the h2 cylinder 313 contract, thereby driving the rotary tiller 40 to naturally descend by gravity or spring force.

[0106] When the two-position three-way valve 314 is in the second position (see Figure 3 As shown in FIG2 , when the first three-position four-way valve 311 is in the descending position, the hydraulic oil flows out from the tool oil circuit through the oil inlet P1 of the first three-position four-way valve 311 and the second execution port B. At this time, part of the hydraulic oil reaches the second hydraulically controlled one-way valve Y2 through the second oil circuit B1 to open the second hydraulically controlled one-way valve Y2, and the other part reaches the first hydraulically controlled one-way valve Y1 through the second branch circuit B2 to open the first hydraulically controlled one-way valve Y1. After the hydraulic oil passes through the second hydraulically controlled one-way valve Y2 and reaches the first working port D1, There is no flow with the rod chamber V of the h2 cylinder 313, and the hydraulic oil in the rodless chamber W of the h1 cylinder 312 and the h2 cylinder 313 flows through the throttle valve Z2, the first hydraulically controlled one-way valve Y1, the first execution port A, and the return oil port T1 to the oil tank 101. At the same time, due to the effect of negative pressure, the hydraulic oil in the oil tank 101 enters through the third working port D3 and is then sucked into the rod chamber V of the h1 cylinder 312 and the h2 cylinder 313 through the second working port D2, thereby forcing the rotary tiller 40 to descend.

[0107] Through this embodiment, different options of natural descent and forced descent can be realized, which helps the rotary tiller 200 to descend more smoothly. At the same time, different operating modes can be selected, making it convenient for users to make different choices according to their needs.

[0108] See also Figure 1 and Figure 4As shown, the horizontal adjustment subsystem 32 includes a second three-position four-way valve 321, an h3 oil cylinder 322, a third hydraulically controlled one-way valve Y3, a fourth hydraulically controlled one-way valve Y4, a third oil circuit A3, a third branch A4, a fourth oil circuit B3, and a fourth branch B4. The second three-position four-way valve 321 is connected to the horizontal adjustment oil inlet circuit P02 and the second oil return circuit T0. The h3 oil cylinder 322 is connected to the second three-position four-way valve 321. The h3 oil cylinder 322 includes a rodless cavity W and a rod cavity V. The third hydraulically controlled one-way valve Y3 includes an oil inlet, an oil outlet, and a control oil port. The fourth hydraulically controlled one-way valve Y4 includes an oil inlet, an oil outlet, and a control oil port. Control oil port, the oil inlet of the third hydraulically controlled one-way valve Y3 is connected to the second three-position four-way valve 321 through the third oil circuit A3, the oil outlet of the third hydraulically controlled one-way valve Y3 is connected to the rodless chamber W of the h3 cylinder 322, the control oil port of the third hydraulically controlled one-way valve Y3 is connected to the fourth oil circuit B3 through the fourth branch B4, the oil inlet of the fourth hydraulically controlled one-way valve Y4 is connected to the second three-position four-way valve 321 through the fourth oil circuit B3, the oil outlet of the fourth hydraulically controlled one-way valve Y4 is connected to the rod chamber V of the h3 cylinder 322, and the control oil port of the fourth hydraulically controlled one-way valve Y4 is connected to the third oil circuit A3 through the third branch A4.

[0109] This embodiment can better adjust the horizontal angle between the rotary tiller 40 and the ground, improve the situation of different trench depths after tilling land with different flatness, thereby better realizing rotary tillage operations in trenches of different depths and providing good arable land conditions for subsequent crop growth.

[0110] A quick-change connector K is provided between the rodless chamber W of the h3 oil cylinder 322 and the third hydraulically controlled one-way valve Y3, and a quick-change connector K is provided between the rod chamber V of the h3 oil cylinder 322 and the fourth hydraulically controlled one-way valve Y4. The provision of the quick-change connector K in this application allows for the addition of sub-control oil circuit systems with different functions according to user needs, thereby improving the realization of multiple functions of the rotary tiller 200 and enhancing the practicality of the rotary tiller 200.

[0111] The telescopic subsystem 33 of the leveling machine includes a third three-position four-way valve 331, an h4 oil cylinder 332, an h5 oil cylinder 333, a fifth hydraulically controlled one-way valve Y5, a sixth hydraulically controlled one-way valve Y6, a fifth oil circuit A5, a fifth branch A6, a sixth oil circuit B5, and a sixth branch B6. The third three-position four-way valve 331 is connected to the telescopic oil inlet circuit P03 of the leveling machine and the second oil return circuit T0. The h4 oil cylinder 332 is connected to the second three-position four-way valve 321. The h4 oil cylinder 332 includes a rodless cavity W and a rod cavity V. The h5 oil cylinder 333 is arranged in parallel with the h4 oil cylinder 332. The h5 oil cylinder 333 includes a rodless cavity W and a rod cavity V. The fifth hydraulically controlled one-way valve Y5 includes an oil inlet, an oil outlet, and a control oil port. The sixth hydraulically controlled one-way valve Y5 includes an oil inlet, an oil outlet, and a control oil port. The one-way valve Y6 includes an oil inlet, an oil outlet and a control oil port. The oil inlet of the fifth hydraulically controlled one-way valve Y5 is connected to the third three-position four-way valve 331 through the fifth oil circuit A5, the oil outlet of the fifth hydraulically controlled one-way valve Y5 is connected to the rodless cavity W of the h4 cylinder 332 and the h5 cylinder 333, the control oil port of the fifth hydraulically controlled one-way valve Y5 is connected to the sixth oil circuit B5 through the sixth branch B6, the oil inlet of the sixth hydraulically controlled one-way valve Y6 is connected to the third three-position four-way valve 331 through the sixth oil circuit B5, the oil outlet of the fourth hydraulically controlled one-way valve Y4 is connected to the rod cavity V of the h4 cylinder 332 and the h5 cylinder 333, and the control oil port of the sixth hydraulically controlled one-way valve Y6 is connected to the fifth oil circuit A5 through the fifth branch A6.

[0112] A quick-change connector K is provided between the rodless chamber W of the h4 cylinder 332 and the h5 cylinder 333 and the fifth hydraulically controlled one-way valve Y5, and a quick-change connector K is provided between the rod chamber V of the h4 cylinder 332 and the h5 cylinder 333 and the sixth hydraulically controlled one-way valve Y6. The provision of the quick-change connector K in this application allows for the addition of sub-control oil circuit systems with different functions according to user needs, thereby improving the realization of multiple functions of the rotary tiller 200 and enhancing the practicality of the rotary tiller 200.

[0113] The leveling machine lifting subsystem 34 includes a fourth three-position four-way valve 341, an h6 oil cylinder 342, an h7 oil cylinder 343, a seventh hydraulically controlled one-way valve Y7, an eighth hydraulically controlled one-way valve Y8, a seventh oil circuit A7, a seventh branch A8, an eighth oil circuit B7, and an eighth branch B8. The fourth three-position four-way valve 341 is connected to the leveling machine lifting oil inlet circuit P04 and the second oil return circuit T0. The h6 oil cylinder 342 is connected to the fourth three-position four-way valve 341. The h6 oil cylinder 342 includes a rodless cavity W and a rod cavity V. The h7 oil cylinder 343 is arranged in parallel with the h6 oil cylinder 342. The h7 oil cylinder 343 includes a rodless cavity W and a rod cavity V. The seventh hydraulically controlled one-way valve Y7 includes an oil inlet, an oil outlet, and a control oil port. The eighth hydraulically controlled The one-way valve Y8 includes an oil inlet, an oil outlet and a control oil port. The oil inlet of the seventh hydraulically controlled one-way valve Y7 is connected to the fourth three-position four-way valve 341 through the seventh oil circuit A7, the oil outlet of the seventh hydraulically controlled one-way valve Y7 is connected to the rodless cavity W of the h6 cylinder 342 and the h7 cylinder 343, the control oil port of the seventh hydraulically controlled one-way valve Y7 is connected to the eighth oil circuit B7 through the eighth branch B8, the oil inlet of the eighth hydraulically controlled one-way valve Y8 is connected to the fourth three-position four-way valve 341 through the eighth oil circuit B7, the oil outlet of the fourth hydraulically controlled one-way valve Y4 is connected to the rod cavity V of the h6 cylinder 342 and the h7 cylinder 343, and the control oil port of the eighth hydraulically controlled one-way valve Y8 is connected to the seventh oil circuit A7 through the seventh branch A8.

[0114] The leveling machine lifting subsystem 34 also includes a check valve Z1 connected between the seventh hydraulically controlled check valve Y7 and the rodless chamber W of the h6 oil cylinder 342, and a throttle valve Z2 arranged in parallel with the check valve Z2. This application allows for the selective addition of check valves Z3 and throttle valves Z2 based on load, ensuring proper cylinder extension and retraction, facilitating smooth raising and lowering of the leveling machine.

[0115] A quick-change connector K is provided between the rodless chamber W of the h6 and h7 oil cylinders 342 and 343 and the seventh hydraulically controlled one-way valve Y7, and a quick-change connector K is provided between the rod chamber V of the h6 and h7 oil cylinders 342 and 343 and the eighth hydraulically controlled one-way valve Y8. The provision of the quick-change connector K in this application allows for the addition of sub-control oil circuit systems with different functions according to user needs, thereby improving the realization of multiple functions of the rotary tiller 200 and enhancing the practicality of the rotary tiller 200.

[0116] See also Figure 5 and Figure 6As shown, another aspect of the present embodiment provides a rotary tiller 200 including the above-mentioned rotary tiller hydraulic system 100, including a rotary tiller 40 and a connecting frame assembly 50, the rotary tiller is located at the rear of the rotary tiller, the connecting frame assembly 50 includes a horizontal pull rod 53, an upper connecting frame 51, an h1 oil cylinder 312, an h3 oil cylinder 322, an h3 oil cylinder 322, a lower connecting rod 52, and a horizontal pull rod 53, the two ends of the horizontal pull rod 53 are respectively connected to the rotary tiller 40 and the rotary tiller upper connecting frame 51 and the rotary tiller 200, one end of the h1 oil cylinder 312 and the h2 oil cylinder 313 is connected to the upper connecting frame 51, and the other end is connected to The rotary tiller 200 is connected to realize the lifting and lowering of the rotary tiller 40. One end of the lower connecting rod 52 is connected to the rotary tiller 40 and the other end is connected to the rotary tiller 200. One end of the horizontal pull rod 53 is connected to the upper connecting frame 51 and the other end is connected to the bottom. One end of the h3 oil cylinder 322 is connected to the upper connecting frame 51 and the other end is connected to the bottom. One end of the vertical pull rod 54 is connected to the upper connecting frame 51 and the other end is connected to the lower connecting rod 52; the h3 oil cylinder 322 and the horizontal pull rod 53 are arranged opposite to each other along the left and right sides of the rotary tiller 200, and the h3 oil cylinder 322 can be extended and retracted along the upper and lower directions of the rotary tiller 200 to adjust the horizontal inclination angle of the rotary tiller 40. Through this application, the horizontal distance of one end of the rotary tiller 40 relative to the ground can be kept unchanged, while the horizontal distance of the other end relative to the ground can be adjusted. When the ground is uneven, the horizontal angle between the rotary tiller 40 and the ground can be better adjusted, thereby better realizing rotary tillage operations in trenches of different depths and providing good arable land conditions for subsequent crop growth.

[0117] The rotary tiller 40 includes a first connecting portion 41, a second connecting portion 42, and a third connecting portion 43. The first connecting portion 41 is connected to one end of a horizontal pull rod 53. The lower connecting rods 52 include two arranged on the left and right sides. The second connecting portion 42 and the third connecting portion 43 are respectively connected to one end of the two lower connecting rods 52. Through this application, a three-point suspension connection between the rotary tiller 40 and the entire machine is achieved, which is more simple and flexible.

[0118] See also Figure 6 As shown, a rotary tiller 200 includes the rotary tiller hydraulic system 100 of the above solution.

[0119] It should also be further understood that the first three-position four-way valve in this embodiment includes a neutral position, an ascending position, a descending position, an oil inlet, an oil return port, a first execution port, and a second execution port. The second three-position four-way valve, the third three-position four-way valve, and the fourth three-position four-way valve have the same structure as the first three-position four-way valve, so they will not be repeated. In addition, in this embodiment, the number of parallel cylinders in each oil circuit in the tool control unit is selected as one or two according to the functional requirements of the tool. It is obvious to those skilled in the art that the number of cylinders can be selected as one, two, or more according to the functional requirements of the tool.

[0120] It should be noted that it is obvious to those skilled in the art that the oil cylinder in this embodiment can also be replaced by an electric cylinder.

[0121] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. A rotary tiller hydraulic system, characterized in that: include: A total control system, the total control system including an oil tank for providing hydraulic oil; A steering control unit, comprising a first oil inlet circuit connected to the overall control system and a first oil return circuit connected to the oil tank, for controlling the steering of the rotary tiller; An implement control unit, the implement control unit comprising a second oil inlet circuit connected to the overall control system and a second oil return circuit connected to the fuel tank, for controlling the operation of the rotary tiller; The implement control unit is arranged in parallel with the steering control unit; The implement control unit includes the field leveler telescopic subsystem, the field leveler lifting subsystem, the rotary tiller lifting subsystem and the leveling subsystem; The field leveler telescopic subsystem, the field leveler lifting subsystem, the rotary tiller lifting subsystem and the horizontal adjustment subsystem are arranged in parallel.

2. A rotary tiller hydraulic system according to claim 1, characterized in that The rotary tiller lifting subsystem includes: A rotary tiller lifting oil inlet circuit, the rotary tiller lifting oil inlet circuit being connected to the second oil inlet circuit; a first three-position four-way valve, the first three-position four-way valve being connected to the rotary tiller lifting oil inlet circuit and the second oil return circuit; h1 oil cylinder, the h1 oil cylinder is connected to the first three-position four-way valve, the h1 oil cylinder includes a rodless chamber and a rod chamber; h2 oil cylinder, the h2 oil cylinder is arranged in parallel with the h1 oil cylinder, the h2 oil cylinder includes a rodless cavity and a rod cavity; a first hydraulically controlled one-way valve connected to the oil path between the first three-position four-way valve and the rodless chambers of the h1 and h2 oil cylinders; a second hydraulically controlled one-way valve connected to the oil path between the first three-position four-way valve and the rod chambers of the h1 and h2 oil cylinders; A two-position three-way valve is connected to the oil path between the second hydraulically controlled one-way valve and the rod chambers of the h1 oil cylinder and the h2 oil cylinder.

3. A rotary tiller hydraulic system according to claim 2, characterized in that The two-position three-way valve includes a first position and a second position: When the two-position three-way valve is in the first position, the first three-position four-way valve controls the hydraulic oil in the rod chamber or rodless chamber of the h1 oil cylinder and the h2 oil cylinder to achieve forced control of the rotary tiller to descend or ascend; When the two-position three-way valve is in the second position, the natural descent of the rotary tiller is achieved by controlling the hydraulic oil in the rod chambers of the h1 oil cylinder and the h2 oil cylinder through the first three-position four-way valve.

4. A rotary tiller hydraulic system according to claim 3, characterized in that: The level adjustment subsystem includes: a horizontal adjustment oil inlet passage, the horizontal adjustment oil inlet passage being connected to the second oil inlet passage; a second three-position four-way valve, the second three-position four-way valve being connected to the rotary tiller lifting oil inlet circuit and the second oil return circuit; h3 oil cylinder, the h3 oil cylinder is connected to the second three-position four-way valve and includes a rodless chamber and a rod chamber; a third hydraulically controlled one-way valve connected to the oil path between the second three-position four-way valve and the rodless chamber of the h3 oil cylinder; A fourth hydraulically controlled one-way valve is connected to the oil circuit between the second three-position four-way valve and the rod chamber of the h3 oil cylinder.

5. A rotary tiller hydraulic system according to claim 4, characterized in that The telescopic subsystem of the leveling machine includes: a telescopic oil inlet for the field leveler, the telescopic oil inlet for the field leveler being connected to the second oil inlet; A third three-position four-way valve, the third three-position four-way valve being connected to the telescopic oil inlet circuit of the leveling machine and the second oil return circuit; h4 oil cylinder, the h4 oil cylinder is connected to the second three-position four-way valve and includes a rodless chamber and a rod chamber; H5 oil cylinder, the H5 oil cylinder is arranged in parallel with the H4 oil cylinder, and includes a rodless cavity and a rod cavity; a fifth hydraulically controlled one-way valve connected to the oil path between the third three-position four-way valve and the rodless chambers of the H4 and H5 oil cylinders; The sixth hydraulically controlled one-way valve is connected to the oil path between the third three-position four-way valve and the rod chambers of the h4 and h5 oil cylinders.

6. A rotary tiller hydraulic system according to claim 5, characterized in that The field leveling machine lifting subsystem includes: a field leveling machine lifting oil inlet passage, the field leveling machine lifting oil inlet passage being connected to the second oil inlet passage; a fourth three-position four-way valve, the fourth three-position four-way valve being connected to the lifting oil inlet circuit of the leveling machine and the second oil return circuit; H6 oil cylinder, the H6 oil cylinder is connected to the fourth three-position four-way valve, and includes a rodless chamber and a rod chamber; H7 oil cylinder, the H7 oil cylinder is arranged in parallel with the H6 oil cylinder, and includes a rodless cavity and a rod cavity; a seventh hydraulically controlled one-way valve connected to the oil path between the fourth three-position four-way valve and the rodless chambers of the H6 and H7 oil cylinders; An eighth hydraulically controlled one-way valve is connected to the oil circuit between the fourth three-position four-way valve and the rod chambers of the h6 and h7 oil cylinders.

7. A rotary tiller hydraulic system according to claim 6, characterized in that The overall control system also includes: a gear pump connected to the oil tank; a coarse filter, the coarse filter being placed between the oil tank and the gear pump and connected to the oil tank and the gear pump; a fine filter connected to the gear pump; a diverter valve, one end of which is connected to the fine filter via an oil inlet line, and the other end of which is connected to the first oil inlet line and the second oil inlet line, respectively; the first oil inlet line is connected to the steering control unit, and the second oil inlet line is connected to the tool control unit; an electromagnetic main valve, one end of which is connected to the diverter valve, and the other end of which is connected to the oil tank; A first overflow valve is further provided between the diverter valve and the fine filter oil circuit, and the first overflow valve is communicated with the oil tank.

8. A rotary tiller hydraulic system according to claim 7, characterized in that The steering control unit includes: a five-position five-way valve connected to the first oil inlet line, a left-turn oil cylinder connected to the five-position five-way valve, a right-turn oil cylinder arranged in parallel with the left-turn oil cylinder, and a second overflow valve with one end connected between the five-position five-way valve and the diverter valve and the other end connected to the oil tank. The right-turn oil cylinder is connected to the five-position five-way valve.

9. A rotary tiller hydraulic system according to claim 8, characterized in that The rotary tiller lifting subsystem also includes a one-way valve connected between the first hydraulically controlled one-way valve and the rodless chamber of the h2 oil cylinder, and a throttle valve arranged in parallel with the one-way valve.

10. The rotary tiller hydraulic system according to claim 9, characterized in that: A quick-change joint is provided between the rodless chamber of the h3 oil cylinder and the third hydraulically controlled one-way valve, and a quick-change joint is provided between the rod chamber of the h3 oil cylinder and the fourth hydraulically controlled one-way valve.

11. A rotary tiller according to claim 1 or 10, characterized in that The invention comprises a rotary tillage implement and a connecting frame assembly, wherein the connecting frame assembly comprises: a horizontal pull rod, the two ends of which are respectively connected to the rotary tiller and the rotary tiller; an upper connecting frame connected to the rotary tiller; h1 oil cylinder; h2 oil cylinder; One end of the h1 oil cylinder and the h2 oil cylinder is connected to the upper connecting frame, and the other end is connected to the rotary tiller to realize the lifting of the rotary tiller; a lower connecting rod, one end of which is connected to the rotary tiller and the other end of which is connected to the rotary tiller; A vertical pull rod, one end of which is connected to the upper connecting frame and the other end is connected to the lower connecting rod; an h3 oil cylinder, one end of which is connected to the upper connecting frame and the other end is connected to the lower connection, the h3 oil cylinder and the horizontal pull rod are arranged opposite to each other along the left and right sides of the rotary tiller, and the h3 oil cylinder can be extended and retracted along the up and down directions of the rotary tiller to adjust the horizontal inclination angle of the rotary tiller.

Images