Hydraulic oil way system for harvester

Abstract

The hydraulic oil way system is characterized in that the hydraulic oil way system comprises a first hydraulic oil way and a second hydraulic oil way, the two ends of the first hydraulic oil way are connected with a working oil cylinder and a hydraulic main way respectively, and the two ends of the second hydraulic oil way are connected with a hydraulic motor and the hydraulic main way respectively; the hydraulic main path is connected with a hydraulic source, a first two-position three-way control valve is arranged between the hydraulic main path and the first hydraulic oil path and between the hydraulic main path and the second hydraulic oil path, a second two-position three-way control valve is arranged on the second hydraulic oil path, and the second hydraulic oil path is divided into a first branch and a second branch through the second two-position three-way control valve. The first branch is connected with the first oil cylinder, the second branch is connected with the second oil cylinder, the second hydraulic oil way is connected to the first hydraulic oil way through the hydraulic motor, and the joint of the second hydraulic oil way and the first hydraulic oil way is located between the first two-position three-way control valve and the second two-position three-way control valve.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil circuit system for a harvester. Background Art

[0002] Corn harvester is an agricultural machine that harvests corn stalks when the corn is ripe or close to ripe according to agronomic requirements. It is a new type of agricultural machinery developed for the development of new energy and to reduce the labor intensity of farmers. It is a low-priced agricultural machinery suitable for the popularization of small four-wheeled vehicles in rural areas and can harvest corn stalks. It shortens the labor cycle of farmers and frees them from heavy physical labor.

[0003] Corn harvesters usually use hydraulic systems to realize the operation and transmission of the mechanism, but different harvesters require different matching hydraulic systems. This patent aims to propose a universal hydraulic system to meet some functions of corn harvesters. Utility Model Content

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

[0005] A hydraulic oil circuit system for a harvester comprises a first hydraulic oil circuit and a second hydraulic oil circuit, wherein both ends of the first hydraulic oil circuit are respectively connected to a working oil cylinder and a hydraulic main circuit, and both ends of the second hydraulic oil circuit are respectively connected to a hydraulic motor and a hydraulic main circuit.

[0006] The main hydraulic circuit is connected to the hydraulic source. A two-position three-way control valve 1 is provided between the main hydraulic circuit and the first hydraulic oil circuit and the second hydraulic oil circuit. A two-position three-way control valve 2 is provided on the second oil circuit. The second hydraulic oil circuit is divided into a first branch and a second branch through the two-position three-way control valve 2. The first branch is connected to the first oil cylinder, and the second branch is connected to the second oil cylinder.

[0007] The second hydraulic oil circuit is connected to the first hydraulic oil circuit through a hydraulic motor, and the connection point between the second hydraulic oil circuit and the first hydraulic oil circuit is located between the first two-position three-way control valve and the second two-position three-way control valve.

[0008] Preferably, the two-position three-way control valve 1 includes a first state position and a second state position, and the two-position three-way control valve 1 includes a first liquid inlet, a first liquid outlet, and a second liquid outlet, the first liquid inlet is connected to the hydraulic main circuit, the first liquid outlet is connected to the first hydraulic oil circuit, and the second liquid outlet is connected to the second hydraulic oil circuit;

[0009] The first state position: the first liquid inlet is connected to the first liquid outlet, and the second state position: the first liquid inlet is connected to the second liquid outlet.

[0010] Preferably, the two-position three-way control valve 2 includes a first state position and a second state position, the two-position three-way control valve 1 includes a second liquid inlet, a third liquid outlet, and a fourth liquid outlet, the second liquid inlet is connected to the first hydraulic oil circuit, the third liquid outlet is connected to the first branch, and the fourth liquid outlet is connected to the second branch;

[0011] The first state position: the second liquid inlet is connected to the third liquid outlet, and the second state position: the second liquid inlet is connected to the third liquid outlet.

[0012] Preferably, a one-way valve is provided between the hydraulic motor and the first hydraulic oil circuit, and the flow direction of the one-way valve is toward the first hydraulic oil circuit.

[0013] Preferably, a one-way valve is provided on the second branch line, and the flow direction of the one-way valve is toward the second oil cylinder.

[0014] Preferably, the main hydraulic circuit is connected to the oil tank through a third hydraulic oil circuit, and an overflow valve is provided on the third hydraulic oil circuit.

[0015] Preferably, the two-position three-way control valve is a mechanical reversing valve.

[0016] Beneficial effects: Compared with the prior art, the utility model realizes some hydraulic functions of the corn harvester through two two-position three-way control valves and two one-way valves. The hydraulic system has a simple structure and is easy to operate, and controls the pressure inside the hydraulic oil circuit through the overflow valve. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] In the figure, 1, hydraulic main circuit, 2, two-position three-way control valve 1, 3, first hydraulic oil circuit, 4, second hydraulic oil circuit, 5, hydraulic motor, 6, one-way valve, 7, two-position three-way control valve 2, 8, first branch, 9, second branch, 10, third hydraulic oil circuit, 11, 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, hydraulic main circuit 1, two-position three-way control valve 1 2, first hydraulic oil circuit 3, second hydraulic oil circuit 4, hydraulic motor 5, one-way valve 6, two-position three-way control valve 2 7, first branch circuit 8, second branch circuit 9, third hydraulic oil circuit 10, overflow valve 11;

[0021] A hydraulic oil circuit system for a harvester includes a first hydraulic oil circuit 3 and a second hydraulic oil circuit 4. Both ends of the first hydraulic oil circuit 3 are respectively connected to a working oil cylinder and a hydraulic main circuit 1. Both ends of the second hydraulic oil circuit 4 are respectively connected to a hydraulic motor 5 and the hydraulic main circuit 1.

[0022] The hydraulic main circuit 1 is connected to the hydraulic source, and the hydraulic main circuit 1 is connected to the oil tank through the third hydraulic oil circuit 10. The third hydraulic oil circuit 10 is provided with an overflow valve 11. A two-position three-way control valve 1 2 is provided between the hydraulic main circuit 1 and the first hydraulic oil circuit 3 and the second hydraulic oil circuit 4. A two-position three-way control valve 2 7 is provided on the second oil circuit. The second hydraulic oil circuit 4 is divided into a first branch 8 and a second branch 9 through the two-position three-way control valve 2 7. The first branch 8 is connected to the first oil cylinder, and the second branch 9 is connected to the second oil cylinder. A one-way valve 6 is provided on the second branch 9, and the flow direction of the one-way valve 6 is toward the second oil cylinder.

[0023] The second hydraulic oil circuit 4 is connected to the first hydraulic oil circuit 3 through the hydraulic motor 5. The connection between the second hydraulic oil circuit 4 and the first hydraulic oil circuit 3 is located between the two-position three-way control valve 1 2 and the two-position three-way control valve 2 7. A one-way valve 6 is provided between the hydraulic motor 5 and the first hydraulic oil circuit 3. The flow direction of the one-way valve 6 is toward the first hydraulic oil circuit 3.

[0024] Preferably, the two-position three-way control valve 1 2 includes a first state position and a second state position, and the two-position three-way control valve 1 includes a first liquid inlet, a first liquid outlet, and a second liquid outlet, the first liquid inlet is connected to the hydraulic main circuit 1, the first liquid outlet is connected to the first hydraulic oil circuit 3, and the second liquid outlet is connected to the second hydraulic oil circuit 4;

[0025] The first state position: the first liquid inlet is connected to the first liquid outlet, and the second state position: the first liquid inlet is connected to the second liquid outlet.

[0026] The two-position three-way control valve 2 7 includes a first state position and a second state position, and the two-position three-way control valve 1 includes a second liquid inlet, a third liquid outlet, and a fourth liquid outlet, the second liquid inlet is connected to the first hydraulic oil circuit 3, the third liquid outlet is connected to the first branch 8, and the fourth liquid outlet is connected to the second branch 9;

[0027] The first state position: the second liquid inlet is connected to the third liquid outlet, and the second state position: the second liquid inlet is connected to the third liquid outlet.

[0028] Instructions for use: When the two-position three-way control valve 1 2 is in the first state, the hydraulic oil enters the first hydraulic oil circuit 3 through the hydraulic main circuit 1; when the two-position three-way control valve 2 7 is in the second state, the hydraulic oil enters the first oil cylinder; when the two-position three-way control valve 2 7 is in the second state, the hydraulic oil enters the second oil cylinder;

[0029] When the two-position three-way solenoid valve 1 is in the second state, the hydraulic oil enters the second hydraulic oil circuit 4 through the main circuit, passes through the hydraulic motor 5 and enters the second hydraulic oil circuit 4. When the two-position three-way control valve 2 7 is in the second state, the hydraulic oil enters the first cylinder. When the two-position three-way control valve 2 7 is in the second state, the hydraulic oil enters the second cylinder.

[0030] 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 oil circuit system for a harvester, characterized in that: It includes a first hydraulic oil circuit and a second hydraulic oil circuit, wherein both ends of the first hydraulic oil circuit are connected to the working oil cylinder and the hydraulic main circuit respectively, and both ends of the second hydraulic oil circuit are connected to the hydraulic motor and the hydraulic main circuit respectively. The hydraulic main circuit is connected to the hydraulic source, a two-position three-way control valve 1 is provided between the hydraulic main circuit and the first hydraulic oil circuit and the second hydraulic oil circuit, a two-position three-way control valve 2 is provided on the second hydraulic oil circuit, and the second hydraulic oil circuit is divided into a first branch and a second branch through the two-position three-way control valve 2, the first branch is connected to the first oil cylinder, and the second branch is connected to the second oil cylinder. The second hydraulic oil circuit is connected to the first hydraulic oil circuit through a hydraulic motor, and the connection point between the second hydraulic oil circuit and the first hydraulic oil circuit is located between the first two-position three-way control valve and the second two-position three-way control valve.

2. The hydraulic oil circuit system for a harvester according to claim 1, characterized in that: The two-position three-way control valve 1 includes a first state position and a second state position, and the two-position three-way control valve 1 includes a first liquid inlet, a first liquid outlet, and a second liquid outlet, the first liquid inlet is connected to the hydraulic main circuit, the first liquid outlet is connected to the first hydraulic oil circuit, and the second liquid outlet is connected to the second hydraulic oil circuit; The first state position: the first liquid inlet is connected to the first liquid outlet, and the second state position: the first liquid inlet is connected to the second liquid outlet.

3. The hydraulic oil circuit system for a harvester according to claim 1, characterized in that: The two-position three-way control valve 2 includes a first state position and a second state position, the two-position three-way control valve 1 includes a second liquid inlet, a third liquid outlet, and a fourth liquid outlet, the second liquid inlet is connected to the first hydraulic oil circuit, the third liquid outlet is connected to the first branch, and the fourth liquid outlet is connected to the second branch; The first state position: the second liquid inlet is connected to the third liquid outlet, and the second state position: the second liquid inlet is connected to the third liquid outlet.

4. The hydraulic oil circuit system for a harvester according to claim 1, characterized in that: A one-way valve is provided between the hydraulic motor and the first hydraulic oil circuit, and the flow direction of the one-way valve is toward the first hydraulic oil circuit.

5. The hydraulic oil circuit system for a harvester according to claim 1, characterized in that: The second branch is provided with a one-way valve, and the flow direction of the one-way valve is toward the second oil cylinder.

6. The hydraulic oil circuit system for a harvester according to claim 1, characterized in that: The main hydraulic circuit is connected to the oil tank through the third hydraulic oil circuit, and an overflow valve is arranged on the third hydraulic oil circuit.

7. The hydraulic oil circuit system for a harvester according to claim 1, characterized in that: Two-position three-way control valves are all mechanical reversing valves.

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