Tractor power gear shifting lubrication control system, hydraulic system and tractor

Abstract

The utility model relates to the technical field of tractors, in particular to a tractor power gear shifting lubrication control system, a hydraulic system and a tractor. The second end of an oil inlet pipeline is communicated with the first end of a control oil way, and the second end of the control oil way is communicated with the control end of a first clutch through a first electromagnetic valve; the second end of the control oil way communicates with the control end of the second clutch through a second electromagnetic valve. The second end of the oil inlet pipeline is communicated with the input end of an overflow valve through a pipeline, the output end of the overflow valve is communicated with the lubricating end of the first clutch through a first lubricating oil way, and the output end of the overflow valve is communicated with the lubricating end of the second clutch through a second lubricating oil way. A second switch valve is arranged on the second lubricating oil way. The utility model has the beneficial effects that the control and lubrication of the wet clutch are accurately combined, and the working wet clutch is ensured to obtain more lubrication flow, so that the lubrication flow of the whole system is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a tractor power shift lubrication control system, a hydraulic system and a tractor. Background Art

[0002] The control and lubrication systems of the wet clutch are currently relatively independent. In the existing solution, the oil at the outlet of the overflow valve is used to lubricate the clutch and reaches the clutch directly in parallel. The overflow valve establishes sufficient system pressure for the control system. After the control system pressure is met, it opens and the oil enters the lubrication. Regardless of whether the clutch is working or not, the lubricating oil will always pass through all clutches, and the control is not precise. Regardless of whether the clutch is working or not, each clutch will receive a certain lubrication flow, which makes the lubrication flow of the entire system too large, and makes it impossible to ensure that the working clutch can obtain sufficient lubrication flow, while causing excessive energy consumption. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tractor power shift lubrication control system, a hydraulic system and a tractor, so as to solve the above problems existing in the prior art.

[0004] The technical solution of the utility model for solving the above technical problems is as follows: A tractor power shift lubrication control system includes a first clutch, a second clutch, an oil tank, an oil pump, a control oil circuit, a first solenoid valve, a second solenoid valve and a relief valve, the oil pump is arranged on an oil inlet pipeline, a first end of the oil inlet pipeline is connected to the oil tank, a second end of the oil inlet pipeline is connected to the first end of the control oil circuit, the second end of the control oil circuit is connected to the control end of the first clutch through a first control branch oil pipe, the second end of the control oil circuit is connected to the control end of the second clutch through a second control branch oil pipe, a first solenoid valve is provided on the first control branch oil pipe, and a second solenoid valve is provided on the second control branch oil pipe; the second end of the oil inlet pipeline is connected to the input end of the relief valve through a pipeline, an output end of the relief valve is connected to the lubrication end of the first clutch through a first lubricating oil circuit, and an output end of the relief valve is connected to the lubrication end of the second clutch through a second lubricating oil circuit, a first switching valve is provided on the first lubricating oil circuit, and a second switching valve is provided on the second lubricating oil circuit.

[0005] The beneficial effects of the present invention are: precise combination of control and lubrication of the wet clutch ensures that the working wet clutch obtains more lubrication flow, thereby reducing the lubrication flow of the entire system, reducing energy consumption, and avoiding dragging of the non-working clutch due to excessive lubricating oil.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, an oil suction filter is provided on the oil inlet pipeline, and the oil suction filter is arranged between the input end of the oil pump and the oil tank.

[0008] The beneficial effect of adopting the above further solution is that the oil suction filter is provided to filter impurities in the oil, thereby avoiding damage to subsequent equipment and increasing the service life of the equipment.

[0009] Furthermore, an outlet filter is provided on the oil inlet pipeline, and the outlet filter is provided between the output end of the oil pump and the control oil circuit.

[0010] The beneficial effect of adopting the above further solution is that the outlet filter can further filter the oil.

[0011] Furthermore, a bypass valve is included. The output end of the overflow valve is connected to the oil tank through a return oil pipe, and the bypass valve is arranged on the return oil pipe.

[0012] The beneficial effect of adopting the above further solution is that the function of the bypass valve is to establish sufficient pressure, close when the pressure is lower than the set value, and open when the pressure is greater than the set value, so that the oil overflowed from the overflow valve can flow back to the oil tank when the oil pressure is too high.

[0013] Furthermore, the first switch valve is a solenoid valve that opens or closes synchronously with the first solenoid valve, and the second switch valve is a solenoid valve that opens or closes synchronously with the second solenoid valve.

[0014] The beneficial effect of adopting the above further solution is: achieving synchronization between the opening of the clutch and the entry of lubricating oil, ensuring that the working clutch can be lubricated and no lubricating oil enters the non-working clutch.

[0015] Furthermore, the first switch valve and the second switch valve are both hydraulic valves, the control end of the first switch valve is connected to the output end of the first solenoid valve through a pipeline, and the control end of the second switch valve is connected to the output end of the second solenoid valve through a pipeline.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that the first switch valve and the second switch valve are both hydraulic valves, which can synchronize the opening and closing of the first switch valve and the second switch valve with the opening and closing of the first solenoid valve or the second solenoid valve, ensuring that the working clutch has lubricating oil entering for lubrication, and the non-working clutch does not have lubricating oil entering.

[0017] Furthermore, the oil pump is a mechanical pump.

[0018] The beneficial effect of adopting the above further solution is that a mechanical pump is used for oil supply, and the system cost is low.

[0019] Furthermore, a liquid level sensor is provided in the oil tank.

[0020] The beneficial effect of adopting the above further solution is that the oil amount in the oil tank can be monitored.

[0021] The utility model solves the above technical problem and further provides a hydraulic system, including the above-mentioned tractor power shift lubrication control system.

[0022] The beneficial effects of adopting the above scheme are: the control and lubrication of the wet clutch are precisely combined, ensuring that the working wet clutch obtains more lubrication flow, thereby reducing the lubrication flow of the entire system, reducing energy consumption, and avoiding dragging of the non-working clutch due to excessive lubricating oil.

[0023] The utility model solves the above technical problem and further provides a tractor, comprising the above hydraulic system.

[0024] The beneficial effects of adopting the above scheme are: the control and lubrication of the wet clutch are precisely combined, ensuring that the working wet clutch obtains more lubrication flow, thereby reducing the lubrication flow of the entire system, reducing energy consumption, and avoiding dragging of the non-working clutch due to excessive lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the utility model;

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1. First clutch; 2. Second clutch; 3. Fuel tank; 4. Oil pump; 5. Control oil circuit; 6. First solenoid valve; 7. Second solenoid valve; 8. Overflow valve; 9. Oil inlet line; 10. First control branch oil pipe; 11. Second control branch oil pipe; 12. First lubricating oil circuit; 13. Second lubricating oil circuit; 14. First on-off valve; 15. Second on-off valve; 16. Oil suction filter; 17. Outlet filter; 18. Bypass valve; 19. Return oil pipe. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] Example 1

[0030] like Figure 1As shown, this embodiment discloses a tractor power shift lubrication control system, including a first clutch 1, a second clutch 2, a fuel tank 3, an oil pump 4, a control oil circuit 5, a first solenoid valve 6, a second solenoid valve 7 and a relief valve 8. The oil pump 4 is provided on an oil inlet line 9. The oil pump 4 is a mechanical pump. The use of a mechanical pump for oil supply has low system cost. A first end of the oil inlet line 9 is connected to the fuel tank 3. A liquid level sensor is provided in the fuel tank 3 to monitor the amount of oil in the fuel tank 3.

[0031] The second end of the oil inlet pipeline 9 is connected to the first end of the control oil circuit 5, and the second end of the control oil circuit 5 is connected to the control end of the first clutch 1 through the first control branch oil pipe 10, and the second end of the control oil circuit 5 is connected to the control end of the second clutch 2 through the second control branch oil pipe 11. The first control branch oil pipe 10 is provided with a first solenoid valve 6, and the second control branch oil pipe 11 is provided with a second solenoid valve 7; the second end of the oil inlet pipeline 9 is connected to the input end of the overflow valve 8 through a pipeline, and the output end of the overflow valve 8 is connected to the lubrication end of the first clutch 1 through the first lubricating oil circuit 12, and the output end of the overflow valve 8 is connected to the lubrication end of the second clutch 2 through the second lubricating oil circuit 13, the first lubricating oil circuit 12 is provided with a first switch valve 14, and the second lubricating oil circuit 13 is provided with a second switch valve 15.

[0032] In this embodiment, the oil inlet line 9 is provided with an oil suction filter 16 and an outlet filter 17. The oil suction filter 16 is located between the input end of the oil pump 4 and the oil tank 3, and the outlet filter 17 is located between the output end of the oil pump 4 and the control oil circuit 5. The oil suction filter 16 is provided to filter impurities in the oil, and the outlet filter 17 further filters the oil to prevent damage to subsequent equipment and increase its service life.

[0033] In this embodiment, a bypass valve 18 is also included. The output end of the relief valve 8 is connected to the oil tank 3 through a return oil pipe 19. The bypass valve 18 is arranged on the return oil pipe 19. The function of the bypass valve 18 is to establish sufficient pressure. It closes when the pressure is lower than the set value and opens when the pressure is greater than the set value. It can return the oil overflowing from the relief valve 8 to the oil tank 3 when the oil pressure is too high.

[0034] In this embodiment, the first switch valve 14 is a solenoid valve that opens or closes synchronously with the first solenoid valve 6, and the second switch valve 15 is a solenoid valve that opens or closes synchronously with the second solenoid valve 7, thereby realizing synchronization between the opening of the clutch and the entry of lubricating oil, ensuring that the working clutch can be lubricated and no lubricating oil enters the non-working clutch.

[0035] Example 2

[0036] like Figure 1 As shown, this embodiment incorporates the following improvements over the first embodiment: both the first on-off valve 14 and the second on-off valve 15 are hydraulic valves. The control end of the first on-off valve 14 is connected to the output end of the first solenoid valve 6 via a pipe, and the control end of the second on-off valve 15 is connected to the output end of the second solenoid valve 7 via a pipe. Both the first on-off valve 14 and the second on-off valve 15 are hydraulic valves, capable of opening and closing synchronously with the opening and closing of the first solenoid valve 6 or the second solenoid valve 7, ensuring that lubricating oil enters the operating clutch for lubrication and prevents lubricating oil from entering the inoperative clutch.

[0037] Working principle: The oil pump 4 starts and draws oil from the oil tank 3. The oil is filtered by the suction filter 16 before entering the oil pump 4, and then filtered by the outlet filter 17 after leaving the oil pump 4 to ensure the cleanliness of the oil. Under the action of the oil pump 4, the oil enters the control oil circuit 5, and the excess oil passes through the relief valve 8. When the first clutch 1 needs to work and the second clutch 2 does not work, the first solenoid valve 6 opens, and at the same time drives the first switch valve 14 to open, while the second solenoid valve 7 and the second switch valve 15 remain closed, controlling the oil to enter the control end of the first clutch 1, controlling the operation of the first clutch 1. At the same time, the oil overflowing from the relief valve 8 enters the lubrication end of the first clutch 1 through the first lubricating oil circuit 12 to lubricate the first clutch 1.

[0038] When the second clutch 2 is required to work and the first clutch 1 is not working, the second solenoid valve 7 is opened, and at the same time, the second switch valve 15 is driven to open. The first solenoid valve 6 and the first switch valve 14 remain closed, and the control oil enters the control end of the second clutch 2 to control the operation of the second clutch 2. At the same time, the oil overflowing from the overflow valve 8 enters the lubrication end of the second clutch 2 through the second lubricating oil circuit 13 to lubricate the second clutch 2.

[0039] In the above two embodiments, the control and lubrication of the wet clutch are precisely combined to ensure that the working wet clutch obtains more lubrication flow, thereby reducing the lubrication flow of the entire system, reducing energy consumption, and avoiding dragging of the non-working clutch due to excessive lubricating oil.

[0040] Example 3

[0041] This embodiment discloses a hydraulic system, including the above-mentioned tractor power shift lubrication control system.

[0042] Example 4

[0043] This embodiment discloses a tractor, comprising the hydraulic system described above.

[0044] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, “a plurality of” means at least two, such as two, three, etc., unless otherwise clearly defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tractor power shift lubrication control system, characterized in that: The invention comprises a first clutch (1), a second clutch (2), an oil tank (3), an oil pump (4), a control oil circuit (5), a first solenoid valve (6), a second solenoid valve (7) and a relief valve (8), wherein the oil pump (4) is arranged on an oil inlet pipeline (9), a first end of the oil inlet pipeline (9) is connected to the oil tank (3), a second end of the oil inlet pipeline (9) is connected to a first end of the control oil circuit (5), a second end of the control oil circuit (5) is connected to a control end of the first clutch (1) through a first control branch oil pipe (10), and a second end of the control oil circuit (5) is connected to a control end of the second clutch (2) through a second control branch oil pipe (11). The first control branch oil pipe (10) is provided with a first solenoid valve (6), and the second control branch oil pipe (11) is provided with a second solenoid valve (7); the second end of the oil inlet pipe (9) is connected to the input end of the relief valve (8) through a pipeline, the output end of the relief valve (8) is connected to the lubrication end of the first clutch (1) through a first lubricating oil circuit (12), and the output end of the relief valve (8) is connected to the lubrication end of the second clutch (2) through a second lubricating oil circuit (13), the first lubricating oil circuit (12) is provided with a first switch valve (14), and the second lubricating oil circuit (13) is provided with a second switch valve (15).

2. A tractor power shift lubrication control system according to claim 1, characterized in that: An oil suction filter (16) is provided on the oil inlet pipeline (9), and the oil suction filter (16) is provided between the input end of the oil pump (4) and the oil tank (3).

3. A tractor power shift lubrication control system according to claim 1, characterized in that: An outlet filter (17) is provided on the oil inlet pipeline (9), and the outlet filter (17) is provided between the output end of the oil pump (4) and the control oil circuit (5).

4. A tractor power shift lubrication control system according to claim 1, characterized in that: It also includes a bypass valve (18), the output end of the overflow valve (8) is connected to the oil tank (3) through a return oil pipe (19), and the bypass valve (18) is arranged on the return oil pipe (19).

5. A tractor power shift lubrication control system according to any one of claims 1 to 4, characterized in that: The first switch valve (14) is a solenoid valve that opens or closes synchronously with the first solenoid valve (6), and the second switch valve (15) is a solenoid valve that opens or closes synchronously with the second solenoid valve (7).

6. A tractor power shift lubrication control system according to any one of claims 1 to 4, characterized in that: The first switch valve (14) and the second switch valve (15) are both hydraulic valves. The control end of the first switch valve (14) is connected to the output end of the first solenoid valve (6) through a pipeline, and the control end of the second switch valve (15) is connected to the output end of the second solenoid valve (7) through a pipeline.

7. A tractor power shift lubrication control system according to any one of claims 1 to 4, characterized in that: The oil pump (4) is a mechanical pump.

8. A tractor power shift lubrication control system according to any one of claims 1 to 4, characterized in that: A liquid level sensor is provided in the oil tank (3).

9. A hydraulic system, characterized in that: The invention comprises a tractor power shift lubrication control system according to any one of claims 1 to 8.

10. A tractor, characterized in that: Comprising a hydraulic system as claimed in claim 9.

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