CN216951376U

CN216951376U - Tractor gearbox clutch electrohydraulic control system and tractor

Info

Publication number: CN216951376U
Application number: CN202221158463.7U
Authority: CN
Inventors: 刘永坚; 申屠军阳; 朱晓岩; 李德芳; 谭洪洋
Original assignee: Weichai Lovol Heavy Industry Co Ltd
Current assignee: Weichai Lovol Intelligent Agricultural Technology Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-07-12
Anticipated expiration: 2032-05-16

Abstract

The utility model relates to an electro-hydraulic control system of a tractor gearbox clutch and a tractor, wherein the electro-hydraulic control system of the tractor gearbox clutch comprises an oil tank, an oil pump, an energy accumulator, an electromagnetic valve and a pressure switching valve, wherein the oil tank is connected with the clutch through an oil inlet pipeline; the oil inlet pipeline is also connected with a pressure switching branch and an energy storage branch, the pressure switching branch is positioned at the upstream of the energy storage branch, the energy storage branch and the pressure switching branch are both connected with the oil tank, the energy storage branch is connected with an energy accumulator, and the pressure switching branch is provided with a pressure switching valve and an oil cooler; the energy storage branch is also connected with a pressure relief branch, and the energy storage branch is connected with the oil tank. The utility model has the advantages of stable pressure maintaining, small pressure drop, timely gear shifting, automatic oil liquid supplement and release through pressure switching, better economy, quick pressure release control through the pressure release branch and convenient and quick maintenance.

Description

Tractor gearbox clutch electrohydraulic control system and tractor

Technical Field

The utility model relates to the technical field of tractors, in particular to an electro-hydraulic control system of a tractor gearbox clutch and a tractor.

Background

At present, tractors equipped with wet clutch transmissions are increasing, and the wet clutch equipped with the tractor transmission needs functions of engagement, disengagement, lubrication, cooling and the like, but great improvements are needed in terms of shifting comfort, maintainability and use economy. The existing clutch electrohydraulic control system can only work under a certain pressure, and the working pressure is unstable.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tractor gearbox clutch electro-hydraulic control system and a tractor, aiming at solving one or more technical problems in the prior art.

The technical scheme for solving the technical problems is as follows: an electro-hydraulic control system of a tractor gearbox clutch comprises an oil tank, an oil pump, an energy accumulator, an electromagnetic valve and a pressure switching valve, wherein the oil tank is connected with the clutch through an oil inlet pipeline, the oil pump and the electromagnetic valve are arranged on the oil inlet pipeline, and the electromagnetic valve is also connected with the oil tank through a pressure relief pipeline; the oil inlet pipeline is also connected with a pressure switching branch and an energy storage branch, the pressure switching branch is positioned at the upstream of the energy storage branch, the energy storage branch and the pressure switching branch are both connected with an oil tank, the energy storage branch is connected with an energy accumulator, and the pressure switching branch is provided with a pressure switching valve and an oil cooler; the energy storage branch is also connected with a pressure relief branch, and the energy storage branch is connected with the oil tank.

The utility model has the beneficial effects that: the clutch electrohydraulic control system has the advantages of stable pressure maintaining, small pressure reduction, timely gear shifting, automatic supplement and release of oil through pressure switching, better economy, quick release of control pressure through the pressure relief branch in the aspect of maintainability, and convenient and quick maintenance. By arranging the energy storage branch and arranging the energy accumulator on the energy storage branch, the energy accumulator can store pressure oil, when the charging pressure is reached, the oil pump is reversed by controlling the pressure switching valve to unload the oil pump, the electro-hydraulic control system can be continuously operated by utilizing the pressure oil in the energy accumulator, the oil output by the oil pump has no pressure, energy is not consumed, the power of the electromagnetic valve acts by the pressure provided by the oil in the energy accumulator, when the pressure of the energy accumulator is consumed to a certain degree, the pressure switching valve is switched back to utilize the oil pump to convey the oil to pressurize, the energy accumulator continues to store energy, and the energy accumulator performs circulating energy storage in such a way, can play a role in stabilizing pressure, reduces the pressure when the electromagnetic valve is reversed, and is sensitive to reversing.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, still be equipped with the filter on the oil inlet pipeline, the filter is located the upper reaches of pressure switching branch road and energy storage branch road.

The beneficial effect of adopting the further scheme is that: through setting up the filter, can make the fluid that enters into pressure switching branch road and energy storage branch road filter earlier, avoid blockking up relevant parts in low reaches.

Further, the oil pump is located upstream of the filter.

The beneficial effect of adopting the further scheme is that: is beneficial to pumping oil into a subsequent pipeline.

Further, a one-way valve is arranged on an oil inlet pipeline between the pressure switching branch and the energy storage branch.

The beneficial effect of adopting the further scheme is that: by arranging the check valve, the oil is prevented from flowing reversely.

Further, a stop valve is arranged on the pressure relief branch.

The beneficial effect of adopting the further scheme is that: through setting up the stop valve, the quick pressure release of convenient operation.

Further, the pressure relief branch is also connected with the pressure switching valve.

And the pressure switching branch is connected with the lubricating and cooling pipeline.

The beneficial effect of adopting the further scheme is that: the oil can be conveyed to a lubricating and cooling pipeline of the clutch after being cooled, and finally the oil can flow back to the oil tank.

Further, the oil cooler is located downstream of the pressure switching valve.

Further, the electromagnetic valve comprises a valve port A, a valve port P and a valve port T, wherein the valve port A is connected with the clutch, the valve port P is connected with the oil inlet pipeline, and the valve port T is connected with the pressure release pipeline;

when the accumulator is in an oil charging state and the pressure switching valve is in a pressure switching state, the valve port A is communicated with the valve port T; when the clutch is in an engaged state, the valve port A is communicated with the valve port P.

The beneficial effect of adopting the further scheme is that: the electro-hydraulic control system can be switched to different use states by switching the electromagnetic valve.

The tractor comprises a clutch and the electro-hydraulic control system of the tractor gearbox clutch.

The utility model has the beneficial effects that: the tractor provided by the utility model adopts the clutch electrohydraulic control system, has the advantages of stable pressure maintaining, small pressure reduction and timely gear shifting, can realize automatic supplement and release of oil through pressure switching, is good in economy, can quickly release control pressure through the pressure release branch in the aspect of maintenance, and is convenient and quick to maintain.

Drawings

FIG. 1 is a schematic view of a connection structure of an electro-hydraulic control system of a tractor gearbox clutch of the utility model;

FIG. 2 is a schematic view of the connection structure of the tractor gearbox clutch electrohydraulic control system in the oil charging state;

FIG. 3 is a schematic view of a pressure switching state connection structure of an electro-hydraulic control system of a tractor gearbox clutch according to the utility model;

FIG. 4 is a schematic view of a clutch engagement connection structure of an electro-hydraulic control system of a tractor gearbox clutch of the utility model;

FIG. 5 is a schematic view of a connection structure of a pressure relief state of an electro-hydraulic control system of a tractor gearbox clutch.

In the drawings, the reference numbers indicate the following list of parts:

1. an oil tank; 2. an oil pump; 3. an accumulator; 4. an electromagnetic valve; 5. a pressure switching valve; 6. an oil cooler; 7. a stop valve; 8. lubricating and cooling the pipeline; 9. a one-way valve; 10. a clutch; 11. and (3) a filter.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

Example 1

As shown in fig. 1 to 5, the tractor transmission clutch electrohydraulic control system of the embodiment includes an oil tank 1, an oil pump 2, an energy accumulator 3, an electromagnetic valve 4 and a pressure switching valve 5, wherein the oil tank 1 is connected with a clutch 10 through an oil inlet pipeline, the oil pump 2 and the electromagnetic valve 4 are arranged on the oil inlet pipeline, and the electromagnetic valve 4 is further connected with the oil tank 1 through a pressure relief pipeline; the oil inlet pipeline is also connected with a pressure switching branch and an energy storage branch, the pressure switching branch is positioned at the upstream of the energy storage branch, the energy storage branch and the pressure switching branch are both connected with the oil tank 1, the energy storage branch is connected with an energy accumulator 3, and the pressure switching branch is provided with a pressure switching valve 5 and an oil cooler 6; the energy storage branch is also connected with a pressure relief branch, and the energy storage branch is connected with the oil tank 1.

As shown in fig. 1 to 5, a preferable scheme of this embodiment is that a filter 11 is further disposed on the oil inlet pipeline, and the filter 11 is located upstream of the pressure switching branch and the energy storage branch. High pressure filter can be chooseed for use to filter 11, through setting up the filter, can make the fluid that enters into pressure switching branch road and energy storage branch road filter earlier, avoids blockking up the relevant part of low reaches.

As shown in fig. 1 to 5, a specific solution of the present embodiment is that the oil pump 2 is located upstream of the filter 11. Is beneficial to pumping oil into a subsequent pipeline.

As shown in fig. 1 to 5, a preferred embodiment of the present invention is that a check valve 9 is disposed on an oil inlet pipeline between the pressure switching branch and the energy storage branch. By arranging the check valve, the oil is prevented from flowing reversely.

As shown in fig. 1 to 5, a specific scheme of this embodiment is that a stop valve 7 is disposed on the pressure relief branch. Through setting up the stop valve, the quick pressure release of convenient operation.

As shown in fig. 1 to fig. 5, an alternative of this embodiment is that the pressure relief branch is further connected to a pressure switching valve 5.

As shown in fig. 1-5, the electro-hydraulic control system for the tractor transmission clutch of the embodiment further comprises a lubricating and cooling pipeline, and the pressure switching branch is connected with the lubricating and cooling pipeline 8. The oil can be conveyed to a lubricating and cooling pipeline of the clutch after being cooled, and finally the oil can flow back to the oil tank.

As shown in fig. 1 to 5, the oil cooler 6 of the present embodiment is located downstream of the pressure switching valve 5.

As shown in fig. 1 to 5, the electromagnetic valve 4 of the present embodiment includes a valve port a, a valve port P, and a valve port T, where the valve port a is connected to the clutch, the valve port P is connected to the oil inlet pipeline, and the valve port T is connected to the pressure relief pipeline; when the accumulator 3 is in an oil-filled state and the pressure switching valve 5 is in a pressure switching state, the valve port A is communicated with the valve port T; when the clutch 10 is in an engaged state, the valve port a is communicated with the valve port P. The electro-hydraulic control system can be switched to different use states by switching the electromagnetic valve.

The direction indicated by the arrow in fig. 2 to 5 is the flow direction of the oil.

The clutch electrohydraulic control system of this embodiment is at the during operation, and during the oil charge state, the fluid of oil tank 1 is exported to filter 11 through oil pump 2, and the fluid after the filtration directly fills liquid for energy storage ware 3 through check valve 9, and stop valve 7 is in the closed condition this moment, and solenoid valve 4 is in the uncharged state, and solenoid valve 4 is located the left side position, and clutch 10 communicates with solenoid valve 4's valve port A, and valve port A communicates with valve port T, and valve port T lug connection to oil tank. When the pressure switching valve is in a pressure switching state, after the accumulator is filled with oil to the set pressure of the pressure switching valve 5, the pressure switching valve 5 is opened, at this time, the oil filtered by the filter 11 is conveyed to the oil cooler 6 through the pressure switching valve 5, the oil cooled by the oil cooler 6 is conveyed to the lubricating and cooling pipeline 8 of the clutch 10, and finally the oil flows back to the oil tank 1. When the clutch 10 is in a meshing state, oil filtered by the filter 11 is conveyed to the valve port P of the electromagnetic valve 4 through the check valve 9, at the moment, the electromagnetic valve 4 is electrified, the electromagnetic valve 4 is located at the right side position, namely, the valve port P is communicated with the valve port a, pressure oil is conveyed to the clutch 10 through the valve port a of the electromagnetic valve 4, and the clutch 10 is in a meshing state. When the pressure of the energy accumulator 3 needs to be discharged, the stop valve 7 is opened manually, and at the moment, the pressure oil quickly returns to the oil tank 1 through the stop valve 7.

The clutch electro-hydraulic control system of this embodiment has that the pressurize is stable, pressure drop is little, shift in time, simultaneously through pressure switch, can realize the automatic replenishment and the release of fluid, and the economic nature is better, in the aspect of the maintainability, can release control pressure fast through the pressure release branch road, maintains convenient and fast. By arranging the energy storage branch and arranging the energy accumulator on the energy storage branch, the energy accumulator can store pressure oil, when the charging pressure is reached, the oil pump is switched by controlling the pressure switching valve to unload, the electro-hydraulic control system can be continuously operated by utilizing the pressure oil in the energy accumulator, the oil output by the oil pump has no pressure, energy consumption is not needed, the power of the electromagnetic valve acts through the pressure provided by the oil in the energy accumulator, when the pressure of the energy accumulator is consumed to a certain degree, the pressure switching valve is switched back to utilize the oil pump to convey the oil to pressurize, the energy accumulator continuously stores energy, and thus, the circulating energy storage is carried out, the pressure stabilizing effect can be achieved, the pressure is reduced when the electromagnetic valve is switched, and the reversing is sensitive.

Example 2

The tractor of this embodiment includes the clutch, still includes foretell tractor gearbox clutch electricity liquid control system.

The tractor of this embodiment adopts above-mentioned clutch electrohydraulic control system, has that the pressurize is stable, pressure drop is little, shift in time, switches through pressure simultaneously, can realize the automatic replenishment and the release of fluid, and the economic nature is better, in the aspect of the maintainability, can release control pressure fast through the pressure release branch road, maintains convenient and fast.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The electro-hydraulic control system for the clutch of the tractor gearbox is characterized by comprising an oil tank, an oil pump, an energy accumulator, an electromagnetic valve and a pressure switching valve, wherein the oil tank is connected with the clutch through an oil inlet pipeline; the oil inlet pipeline is also connected with a pressure switching branch and an energy storage branch, the pressure switching branch is positioned at the upstream of the energy storage branch, the energy storage branch and the pressure switching branch are both connected with an oil tank, the energy storage branch is connected with an energy accumulator, and the pressure switching branch is provided with a pressure switching valve and an oil cooler; the energy storage branch is also connected with a pressure relief branch, and the energy storage branch is connected with the oil tank.

2. The electro-hydraulic control system of the tractor gearbox clutch according to claim 1, characterized in that a filter is further arranged on the oil inlet pipeline, and the filter is located upstream of the pressure switching branch and the energy storage branch.

3. The tractor transmission clutch electro-hydraulic control system of claim 2, wherein the oil pump is located upstream of the filter.

4. The electro-hydraulic control system of the tractor gearbox clutch according to claim 1, characterized in that a one-way valve is arranged on an oil inlet pipeline between the pressure switching branch and the energy storage branch.

5. The tractor transmission clutch electrohydraulic control system of claim 1, wherein said pressure relief branch is provided with a shut-off valve.

6. The tractor transmission clutch electrohydraulic control system of claim 1, wherein said pressure relief branch is further connected to a pressure switching valve.

7. The electro-hydraulic control system of the tractor gearbox clutch according to claim 1, characterized by further comprising a lubrication cooling pipeline, wherein the pressure switching branch is connected with the lubrication cooling pipeline.

8. The tractor transmission clutch electro-hydraulic control system of claim 1, wherein the oil cooler is located downstream of the pressure switching valve.

9. The electro-hydraulic control system of the tractor gearbox clutch according to claim 1, characterized in that the solenoid valve comprises a valve port A, a valve port P and a valve port T, wherein the valve port A is connected with the clutch, the valve port P is connected with an oil inlet pipeline, and the valve port T is connected with a pressure relief pipeline;

when the accumulator is in an oil-filled state and the pressure switching valve is in a pressure switching state, the valve port A is communicated with the valve port T; when the clutch is in a meshing state, the valve port A is communicated with the valve port P.

10. A tractor comprising a clutch and further comprising a tractor gearbox clutch electro-hydraulic control system as claimed in any one of claims 1 to 9.