Hydraulic system for balance control of harvester

Abstract

The utility model discloses a hydraulic system for balance control of a harvester, which comprises a plurality of working systems, each working system comprises a plurality of oil ways and a three-position four-way electromagnetic valve, each three-position four-way electromagnetic valve comprises a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is connected with a hydraulic source through a first oil way, and the second inlet is connected with a second oil way. The second inlet is connected with the oil return tank through a second oil way, the first outlet is connected with the hydraulic element through a third oil way, and the second outlet is connected with the hydraulic element through a fourth oil way; the three-position four-way electromagnetic valve comprises a first station, a second station and a third station; in the first station, the first inlet is connected with the second outlet, and the second inlet is connected with the first outlet; in the second station, the first inlet is closed, and the second inlet is connected with the first outlet and the second outlet; and in the third station, the first inlet is connected with the first outlet, and the second inlet is connected with the second outlet.

Description

Technical Field

[0001] The utility model relates to a hydraulic system for balancing control of a harvester. Background Art

[0002] A sprayer is a machine that disperses liquid into mist. It is a type of machinery that can be divided into agricultural, medical and other uses (such as industrial use). Agricultural use is classified as agricultural machinery for plant protection. Generally, those driven by human power are called sprayers, and those driven by power (engine, motor) are called sprayers. Sprayers are divided into hydraulic, pneumatic and centrifugal sprayers according to their working principles. According to the carrying method, they are divided into handheld, backpack, shoulder, pedal, stretcher, cart, self-propelled, vehicle-mounted, hanging, etc. There are also aerial sprayers.

[0003] The sprayer uses a hydraulic system to achieve movement and drive the working mechanism. Due to the different mechanisms of the sprayer itself, a specific hydraulic system needs to be designed for it. This patent aims to provide a hydraulic system to meet the functional needs of the sprayer. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and provide a hydraulic system for balancing control of a harvester.

[0005] A hydraulic system for balancing control of a harvester, comprising a plurality of working systems, wherein the working systems comprise a plurality of oil circuits and a three-position four-way solenoid valve, wherein the three-position four-way solenoid valve comprises a first inlet, a second inlet, a first outlet, and a second outlet, wherein the first inlet is connected to a hydraulic source via a first oil circuit, the second inlet is connected to an oil return tank via a second oil circuit, the first outlet is connected to a hydraulic element via a third oil circuit, and the second outlet is connected to the hydraulic element via a fourth oil circuit;

[0006] The three-position four-way solenoid valve comprises a first station, a second station and a third station;

[0007] First station: the first inlet is connected to the second outlet, and the second inlet is connected to the first outlet;

[0008] Second station: the first inlet is closed, and the second inlet is connected to the first outlet and the second outlet;

[0009] The third workstation: the first inlet is connected to the first outlet, and the second inlet is connected to the second outlet.

[0010] The working system is provided with a hydraulic lock, which includes two one-way valves, which are respectively arranged on the third oil circuit and the fourth oil circuit, and the two one-way valves are respectively connected to the fourth oil circuit and the third oil circuit through an oil circuit.

[0011] Preferably, the third oil circuit and the fourth oil circuit are also provided with throttle valves.

[0012] Preferably, an overflow valve is provided between the hydraulic source and the oil return tank.

[0013] Preferably, a two-position two-way solenoid valve is provided between the hydraulic source and the oil return tank, the two-position two-way solenoid valve comprises an inlet and an outlet, and the two-position two-way solenoid valve comprises a first station and a second station;

[0014] First station: the import and export are connected;

[0015] Second station: There is a two-way cut-off function between the inlet and the outlet.

[0016] Beneficial effects: Compared with the prior art, the utility model forms a hydraulic system through a valve body, two three-position four-way solenoid valves, a two-position two-way solenoid valve, a relief valve, and two hydraulic locks to meet some hydraulic functions of the harvester. The hydraulic lock prevents the circuit oil from flowing to ensure that the oil cylinder can maintain its position stationary even when there is a certain external load. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a hydraulic system for balance control of a harvester;

[0018] In the figure, 1, the first oil circuit, 2, the second oil circuit, 3, the third oil circuit, 4, the fourth oil circuit, 5, the throttle valve, 6, the hydraulic lock, 7, the three-position four-way solenoid valve, 8, the two-position two-way solenoid valve, 9, the overflow valve. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] like Figure 1 As shown, the first oil circuit 1, the second oil circuit 2, the third oil circuit 3, the fourth oil circuit 4, the throttle valve 5, the hydraulic lock 6, the three-position four-way solenoid valve 7, the two-position two-way solenoid valve 8, and the overflow valve 9;

[0021] A hydraulic system for balancing control of a harvester, comprising a plurality of working systems, wherein the working system comprises a plurality of oil circuits and a three-position four-way solenoid valve 7, wherein the three-position four-way solenoid valve 7 comprises a first inlet, a second inlet, a first outlet, and a second outlet, wherein the first inlet is connected to a hydraulic source via a first oil circuit 1, the second inlet is connected to an oil return tank via a second oil circuit 2, the first outlet is connected to a hydraulic element via a third oil circuit 3, and the second outlet is connected to the hydraulic element via a fourth oil circuit 4;

[0022] The three-position four-way solenoid valve 7 includes a first station, a second station, and a third station;

[0023] First station: the first inlet is connected to the second outlet, and the second inlet is connected to the first outlet;

[0024] Second station: the first inlet is closed, and the second inlet is connected to the first outlet and the second outlet;

[0025] The third workstation: the first inlet is connected to the first outlet, and the second inlet is connected to the second outlet.

[0026] The working system is provided with a hydraulic lock 6, and the hydraulic lock 6 includes two one-way valves, which are respectively arranged on the third oil circuit 3 and the fourth oil circuit 4, and the two one-way valves are respectively connected to the fourth oil circuit 4 and the third oil circuit 3 through an oil circuit.

[0027] In this embodiment, a throttle valve 5 is further provided on the third oil circuit 3 and the fourth oil circuit 4 .

[0028] In this embodiment, an overflow valve is provided between the hydraulic source and the oil return tank.

[0029] In this embodiment, a two-position two-way solenoid valve 8 is provided between the hydraulic source and the oil return tank, the two-position two-way solenoid valve includes an inlet and an outlet, and the two-position two-way solenoid valve 8 includes a first position and a second position;

[0030] First station: the import and export are connected;

[0031] Second station: There is a two-way cut-off function between the inlet and the outlet.

[0032] The specific flow direction of the hydraulic oil in the electromagnetic reversing valve and the change of the oil path after the reversing valve in the hydraulic system is replaced are detailed in Figure 1 .

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic system for harvester balance control, characterized in that: It includes multiple working systems, wherein the working system includes multiple oil circuits and a three-position four-way solenoid valve, wherein the three-position four-way solenoid valve includes a first inlet, a second inlet, a first outlet, and a second outlet, wherein the first inlet is connected to a hydraulic source through a first oil circuit, the second inlet is connected to an oil return tank through a second oil circuit, the first outlet is connected to a hydraulic element through a third oil circuit, and the second outlet is connected to a hydraulic element through a fourth oil circuit; The three-position four-way solenoid valve comprises a first station, a second station and a third station; First station: the first inlet is connected to the second outlet, and the second inlet is connected to the first outlet; Second station: the first inlet is closed, and the second inlet is connected to the first outlet and the second outlet; The third workstation: the first inlet is connected to the first outlet, and the second inlet is connected to the second outlet.

2. A hydraulic system for harvester balance control according to claim 1, characterized in that: The working system is provided with a hydraulic lock, which includes two one-way valves, which are respectively arranged on the third oil circuit and the fourth oil circuit, and the two one-way valves are respectively connected to the fourth oil circuit and the third oil circuit through an oil circuit.

3. The hydraulic system for harvester balance control according to claim 1, characterized in that: The third oil circuit and the fourth oil circuit are also provided with throttle valves.

4. The hydraulic system for harvester balance control according to claim 1, characterized in that: An overflow valve is arranged between the hydraulic source and the oil return tank.

5. The hydraulic system for harvester balance control according to claim 1, characterized in that: A two-position two-way solenoid valve is provided between the hydraulic source and the oil return tank, the two-position two-way solenoid valve includes an inlet and an outlet, and the two-position two-way solenoid valve includes a first station and a second station; First station: the import and export are connected; Second station: There is a two-way cut-off function between the import and export, that is, two-way check.

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