CN219932595U - Hydraulic system of corn harvester - Google Patents
Hydraulic system of corn harvester Download PDFInfo
- Publication number
- CN219932595U CN219932595U CN202320950404.1U CN202320950404U CN219932595U CN 219932595 U CN219932595 U CN 219932595U CN 202320950404 U CN202320950404 U CN 202320950404U CN 219932595 U CN219932595 U CN 219932595U
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- reversing valve
- oil
- hydraulic
- oil cylinder
- way
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- 240000008042 Zea mays Species 0.000 title claims abstract description 14
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims abstract description 14
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims abstract description 13
- 235000005822 corn Nutrition 0.000 title claims abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 137
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 30
- 239000010721 machine oil Substances 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 abstract description 9
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 235000009973 maize Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic system of a corn harvester, which comprises a hydraulic oil tank and a reversing valve group, wherein the reversing valve group comprises a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve and a fifth reversing valve which are connected in parallel, an oil inlet and an oil return port of the reversing valve group are respectively connected with an oil inlet and an oil return port of the hydraulic oil tank through overflow valves, two working oil ports of the fourth reversing valve are respectively connected with a returning machine oil cylinder through two hydraulic control one-way valves, and the fourth reversing valve is a three-position four-way reversing valve with a median function of O type. The reversing valve for controlling the oil cylinder of the returning machine adopts the three-position four-way reversing valve with the O-shaped median function, the PTAB is in a cut-off state during the median position, the return oil is prevented from entering the oil cylinder of the returning machine in the median position state, the automatic rising of the oil cylinder caused by the action of mechanical external force is prevented, and the automatic extending of the oil cylinder of the returning machine when the road condition is poor is avoided.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic system of a corn harvester.
Background
When the corn harvester finds that the road conditions of the whole harvester are poor in ridge passing and the like in the using process, the controlled returning engine oil cylinder automatically stretches out, and the analysis shows that under the action of mechanical external force of the oil cylinder, the hydraulic oil in the oil cylinder generates instantaneous negative pressure, so that return oil reversely flows into the oil cylinder, and the load is automatically lifted.
Disclosure of Invention
The utility model solves the problem that a return engine oil cylinder controlled by the corn harvester automatically stretches out under the poor road conditions such as ridge passing and the like in the related art, and provides a hydraulic system of the corn harvester.
In order to solve the technical problems, the utility model is realized by the following technical scheme: the utility model provides a maize picker hydraulic system, includes hydraulic tank and switching-over valves, the switching-over valves includes parallelly connected first switching-over valve, second switching-over valve, third switching-over valve, fourth switching-over valve and fifth switching-over valve, the oil inlet and the oil return mouth of switching-over valves pass through the overflow valve respectively with hydraulic tank's oil inlet and return mouth link to each other, two work hydraulic fluid ports of fourth switching-over valve link to each other with returning the field machine oil jar through two hydraulically controlled check valves respectively, the fourth switching-over valve is the three-position four-way switching-over valve that the median function is O.
Preferably, the first reversing valve is a two-position four-way reversing valve with a median function of H type.
As a preferable scheme, the two working oil ports of the second reversing valve are respectively connected with the header oil cylinder through two hydraulic control one-way valves, and the second reversing valve is a three-position four-way reversing valve with a Y-shaped median function.
As an optimal scheme, two working oil ports of the third reversing valve are respectively connected with the main clutch oil cylinder through two hydraulic control one-way valves, and the third reversing valve is a three-position four-way reversing valve with a Y-shaped median function.
As an optimal scheme, two working oil ports of the fifth reversing valve are respectively connected with the granary oil cylinder through two hydraulic control one-way valves, and the fifth reversing valve is a three-position four-way reversing valve with a Y-shaped median function.
Compared with the prior art, the utility model has the beneficial effects that: the reversing valve for controlling the oil cylinder of the returning machine adopts the three-position four-way reversing valve with the O-shaped median function, the PTAB is in a cut-off state during the median position, the return oil is prevented from entering the oil cylinder of the returning machine in the median position state, the automatic rising of the oil cylinder caused by the action of mechanical external force is prevented, and the automatic extending of the oil cylinder of the returning machine when the road condition is poor is avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of the present utility model.
In the figure:
1. the hydraulic oil tank, 2, the first reversing valve, 3, the second reversing valve, 4, the third reversing valve, 5, the fourth reversing valve, 6, the fifth reversing valve, 7, the hydraulic control one-way valve, 8 and the overflow valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
As shown in fig. 1, the hydraulic system of the corn harvester comprises a hydraulic oil tank 1 and a reversing valve group, wherein the reversing valve group comprises a first reversing valve 2, a second reversing valve 3, a third reversing valve 4, a fourth reversing valve 5 and a fifth reversing valve 6 which are connected in parallel, an oil inlet and an oil return port of the reversing valve group are respectively connected with an oil inlet P and an oil return port T of the hydraulic oil tank 1 through overflow valves 8, two working oil ports A4 and B4 of the fourth reversing valve 5 are respectively connected with an oil port a3 and an oil port B3 of a return field machine oil cylinder through two hydraulic control one-way valves 7, an oil inlet P4 of the fourth reversing valve 5 is connected with an oil inlet P of the hydraulic oil tank 1 through an oil inlet P6 of the overflow valves 8, an oil return port T4 of the fourth reversing valve 5 is connected with an oil return port T of the hydraulic oil tank 1 through an oil return port T6 of the overflow valves 8, and the fourth reversing valve 5 is a three-position four-way reversing valve with a middle position being O type.
In one embodiment, the first reversing valve 2 is a two-position four-way reversing valve with a median function of H type, the oil inlet P1 of the first reversing valve 2 is connected with the oil inlet P of the hydraulic oil tank 1 through the oil inlet P6 of the overflow valve 8, and the oil return port T1 of the first reversing valve 2 is connected with the oil return port T of the hydraulic oil tank 1 through the oil return port T6 of the overflow valve 8.
In one embodiment, the second reversing valve 3 is a three-position four-way reversing valve with a Y-shaped middle position function, two working oil ports A2 and B2 of the second reversing valve 3 are respectively connected with an a1 oil port and a B1 oil port of the header oil cylinder through two hydraulic control one-way valves 7, an oil inlet P2 of the second reversing valve 3 is connected with an oil inlet P of the hydraulic oil tank 1 through an oil inlet P6 of an overflow valve 8, and an oil return port T2 of the second reversing valve 3 is connected with an oil return port T of the hydraulic oil tank 1 through an oil return port T6 of the overflow valve 8.
In one embodiment, the third reversing valve 4 is a three-position four-way reversing valve with a Y-shaped middle position function, two working oil ports A3 and B3 of the third reversing valve 4 are respectively connected with an a2 oil port and a B2 oil port of the returning machine oil cylinder through two hydraulic control one-way valves 7, an oil inlet P3 of the third reversing valve 4 is connected with an oil inlet P of the hydraulic oil tank 1 through an oil inlet P6 of an overflow valve 8, and an oil return port T3 of the third reversing valve 4 is connected with an oil return port T of the hydraulic oil tank 1 through an oil return port T6 of the overflow valve 8.
In one embodiment, the fifth reversing valve 6 is a three-position four-way reversing valve with a Y-shaped median function, two working oil ports A5 and B5 of the fifth reversing valve 6 are respectively connected with an a4 oil port and a B4 oil port of the returning machine oil cylinder through two hydraulic control one-way valves 7, an oil inlet P5 of the fifth reversing valve 6 is connected with an oil inlet P of the hydraulic oil tank 1 through an oil inlet P6 of the overflow valve 8, and an oil return port T5 of the fifth reversing valve 6 is connected with an oil return port T of the hydraulic oil tank 1 through an oil return port T6 of the overflow valve 8.
The working principle is as follows:
(1) The oil inlets P of the hydraulic oil tank 1 are directly communicated with the oil return port T when the reversing valve groups (1) - (9) are not electrified, and all the oil cylinders do not work;
(2) The oil port a1 of the header oil cylinder is electrified, the header oil cylinder is lifted, the oil port a1 of the header oil cylinder is electrified, the port b1 of the header oil cylinder is connected with the oil inlet P of the hydraulic oil tank 1, the corresponding hydraulic control one-way valve 7 is opened, the port a1 of the header oil cylinder is connected with the oil return port T of the hydraulic oil tank 1, and the header oil cylinder is lifted under the action of the dead weight of load;
(3) The oil port a2 of the main clutch oil cylinder is electrified, the main clutch oil cylinder is lifted, the oil port a2 of the main clutch oil cylinder is electrified, the oil port b2 of the main clutch oil cylinder is connected with the oil inlet P of the hydraulic oil tank 1, the corresponding hydraulic control one-way valve 7 is opened, the oil port a2 of the main clutch oil cylinder is connected with the oil return port T of the hydraulic oil tank 1, and the main clutch oil cylinder is lifted under the action of load dead weight;
(4) The oil port a3 of the oil cylinder of the returning machine is filled with oil, the oil cylinder of the returning machine rises, the oil port (1) (7) of the reversing valve bank is filled with electricity, the port b3 is connected with the oil inlet P of the hydraulic oil tank 1, the corresponding hydraulic control one-way valve 7 is opened, the port a3 of the oil cylinder of the returning machine is connected with the oil return port T of the hydraulic oil tank 1, and the oil cylinder of the returning machine falls under the action of dead weight of load; the fourth reversing valve 5 of the oil cylinder of the returning machine is a three-position four-way reversing valve with the middle position function of O type, the PTAB is in a cut-off state during the middle position, the return oil is prevented from entering the oil cylinder of the returning machine in the middle position state, the oil cylinder is prevented from automatically rising under the action of mechanical external force, and the automatic extension of the oil cylinder of the returning machine when the road condition is poor is avoided;
(5) The (1) and (8) in the reversing valve bank are electrified, the oil port a4 of the granary oil cylinder is electrified, the granary oil cylinder is lifted, the (1) and (9) in the reversing valve bank are electrified, the port b4 is connected with the oil inlet P of the hydraulic oil tank 1, the corresponding hydraulic control one-way valve 7 is opened, the port a4 of the granary oil cylinder is connected with the oil return port T of the hydraulic oil tank 1, oil is returned under the action of the dead weight of load, and the granary oil cylinder is lifted;
(6) When the load action and the oil pressure of the oil cylinder are higher than the set pressure of the relief valve 8 by 16MPa, the relief valve 8 is opened, and the oil inlet P of the hydraulic oil tank 1 is connected with the oil return port T of the hydraulic oil tank 1, and the load pressure is kept by 16MPa.
The above is a preferred embodiment of the present utility model, and a person skilled in the art can also make alterations and modifications to the above embodiment, therefore, the present utility model is not limited to the above specific embodiment, and any obvious improvements, substitutions or modifications made by the person skilled in the art on the basis of the present utility model are all within the scope of the present utility model.
Claims (5)
1. A hydraulic system of a corn harvester, characterized in that: the hydraulic oil tank is characterized by comprising a hydraulic oil tank (1) and a reversing valve group, wherein the reversing valve group comprises a first reversing valve (2), a second reversing valve (3), a third reversing valve (4), a fourth reversing valve (5) and a fifth reversing valve (6) which are connected in parallel, an oil inlet and an oil return port of the reversing valve group are respectively connected with the oil inlet and the oil return port of the hydraulic oil tank (1) through overflow valves (8), two working oil ports of the fourth reversing valve (5) are respectively connected with a returning machine oil cylinder through two hydraulic control one-way valves (7), and the fourth reversing valve (5) is a three-position four-way reversing valve with a median function of O type.
2. The corn harvester hydraulic system of claim 1, wherein: the first reversing valve (2) is a two-position four-way reversing valve with the median function of H type.
3. The corn harvester hydraulic system of claim 1, wherein: the two working oil ports of the second reversing valve (3) are respectively connected with the header oil cylinder through two hydraulic control one-way valves (7), and the second reversing valve (3) is a three-position four-way reversing valve with a Y-shaped median function.
4. The corn harvester hydraulic system of claim 1, wherein: the two working oil ports of the third reversing valve (4) are respectively connected with the main clutch oil cylinder through two hydraulic control one-way valves (7), and the third reversing valve (4) is a three-position four-way reversing valve with a Y-shaped median function.
5. The corn harvester hydraulic system of claim 1, wherein: the two working oil ports of the fifth reversing valve (6) are respectively connected with the granary oil cylinder through two hydraulic control one-way valves (7), and the fifth reversing valve (6) is a three-position four-way reversing valve with a Y-shaped median function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950404.1U CN219932595U (en) | 2023-04-24 | 2023-04-24 | Hydraulic system of corn harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320950404.1U CN219932595U (en) | 2023-04-24 | 2023-04-24 | Hydraulic system of corn harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219932595U true CN219932595U (en) | 2023-10-31 |
Family
ID=88504432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320950404.1U Active CN219932595U (en) | 2023-04-24 | 2023-04-24 | Hydraulic system of corn harvester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219932595U (en) |
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2023
- 2023-04-24 CN CN202320950404.1U patent/CN219932595U/en active Active
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