Lifting and unloading hydraulic system for corn machine and corn machine

Abstract

The utility model provides a lifting unloading hydraulic system for a corn machine and the corn machine, and the lifting unloading hydraulic system for the corn machine structurally comprises a lifting oil cylinder which is used for driving a granary to lift and fall; the grain unloading oil cylinder is used for driving the granary to turn over and withdraw; the lifting control valve is connected with the lifting oil cylinder and the oil tank; the grain unloading control valve is connected with the grain unloading oil cylinder and the oil tank; the first hydraulic pump is connected with the oil tank and the lifting control valve through pipelines; and the second hydraulic pump is connected with the oil tank and the grain unloading control valve through pipelines. According to the lifting and unloading hydraulic system for the corn machine and the corn machine, the problem that an existing lifting and unloading hydraulic system for the corn machine is difficult to meet the use requirement can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of corn harvester hydraulic systems, and in particular to a corn harvester lifting and unloading hydraulic system and a corn harvester. Background Art

[0002] The grain unloading hydraulic system is an important part of the corn harvester hydraulic system. With the need to improve efficiency in large-scale harvesting and large trucks pulling grain, the usual grain unloading height has gradually failed to meet the needs of users. Therefore, there are more and more grain silo unloading models with secondary lifting function, and the demand for hydraulic systems adapted to them is becoming more and more urgent.

[0003] At present, the existing grain unloading system is usually connected in parallel or in series with a valve group to achieve the newly added grain lifting function, but both methods have disadvantages. The parallel valve group cannot achieve the compound action of lifting and unloading, and lifting and unloading are a time-added process. The parallel valve group will greatly reduce the overall operating efficiency. The series valve group will cause the system pressure to be superimposed, resulting in a significant reduction in the lifting and unloading capacity. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a lifting and unloading hydraulic system for a corn harvester and a corn harvester, so as to solve the problem that the lifting and unloading hydraulic system of the existing corn harvester is difficult to meet the usage requirements.

[0005] According to the first aspect of the utility model, a lifting and unloading hydraulic system for a corn harvester is provided, wherein the lifting and unloading hydraulic system for the corn harvester includes: a lifting cylinder, used to drive the grain bin to lift and fall; a grain unloading cylinder, used to drive the grain bin to flip and retract; a lifting control valve, connected to the lifting cylinder and the oil tank; a grain unloading control valve, connected to the grain unloading cylinder and the oil tank; a first hydraulic pump, connected to the oil tank and the lifting control valve through a pipeline; and a second hydraulic pump, connected to the oil tank and the grain unloading control valve through a pipeline.

[0006] Preferably, the lifting control valve includes a first connecting port, a second connecting port, a first oil inlet and a first oil return port, the first connecting port and the second connecting port are connected to the lifting cylinder, the first oil inlet is connected to the first hydraulic pump, and the first oil return port is connected to the oil tank.

[0007] Preferably, a first three-position four-way reversing valve and a first two-position two-way valve are provided in the lifting control valve, the first hydraulic pump is connected to the first three-position four-way reversing valve, the first three-position four-way reversing valve is connected to the lifting cylinder, and the first two-position two-way valve is connected to the first three-position four-way reversing valve.

[0008] Preferably, a first unloading valve is further provided in the lift control valve, and the first unloading valve is connected in parallel with the first two-position two-way valve.

[0009] Preferably, the grain unloading control valve includes a third connecting port, a fourth connecting port, a second oil inlet and a second oil return port, the third connecting port and the fourth connecting port are connected to the grain unloading oil cylinder, the second oil inlet is connected to the second hydraulic pump, and the second oil return port is connected to the oil tank.

[0010] Preferably, a second three-position four-way reversing valve and a second two-position two-way valve are provided in the grain unloading control valve, the second hydraulic pump is connected to the second three-position four-way reversing valve, the second three-position four-way reversing valve is connected to the grain unloading oil cylinder, and the second two-position two-way valve is connected to the second three-position four-way reversing valve.

[0011] Preferably, a second unloading valve is further provided in the grain unloading control valve, and the second unloading valve is connected in parallel with the second two-position two-way valve.

[0012] Preferably, a first oil suction filter is provided between the first hydraulic pump and the oil tank.

[0013] Preferably, a second oil suction filter is provided between the second hydraulic pump and the oil tank.

[0014] According to a second aspect of the utility model, a corn harvester is provided, wherein the corn harvester comprises the lifting and unloading hydraulic system for the corn harvester as described above.

[0015] The lifting and unloading hydraulic system and corn harvester of the utility model embodiment have a lifting cylinder for driving the grain bin to lift and lower, and a grain unloading cylinder for driving the grain bin to flip and retract. The lifting control valve is connected to the lifting cylinder and the oil tank. The grain unloading control valve is connected to the grain unloading cylinder and the oil tank. The first hydraulic pump is connected to the oil tank and the lifting control valve through a pipeline, and the second hydraulic pump is connected to the oil tank and the grain unloading control valve through a pipeline. The lifting cylinder and the grain unloading cylinder are both connected to the oil tank through independent hydraulic pumps, and the lifting cylinder and the grain unloading cylinder have separate power sources. The two can act simultaneously without affecting each other and with high efficiency, thereby achieving simultaneous compound actions, which can effectively solve the problem that the existing corn harvester's lifting and unloading hydraulic system is difficult to meet usage requirements.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a hydraulic system for lifting and unloading grains for a corn harvester according to the utility model.

[0019] Figure markings: 1-lifting cylinder; 2-grain unloading cylinder; 3-lifting control valve; 31-first connecting port; 32-second connecting port; 33-first oil inlet; 34-first oil return port; 301-first three-position four-way reversing valve; 3011-a1 solenoid coil; 3012-b1 solenoid coil; 302-first two-position two-way valve; 303-first unloading valve; 4-grain unloading control valve; 41-third connecting port; 42-fourth connecting port; 43-second oil inlet; 44-second oil return port; 401-second three-position four-way reversing valve; 4011-a2 solenoid coil; 4012-b2 solenoid coil; 402-second two-position two-way valve; 403-second unloading valve; 5-first hydraulic pump; 50-first oil suction filter; 6-second hydraulic pump; 60-second oil suction filter; 7-oil tank. DETAILED DESCRIPTION

[0020] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0021] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0022] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0023] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0024] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0025] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0026] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0027] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0028] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0029] like Figure 1 As shown, according to the first aspect of the utility model, a lifting and unloading hydraulic system for a corn harvester is provided, and the lifting and unloading hydraulic system for the corn harvester includes a lifting cylinder 1, a grain unloading cylinder 2, a lifting control valve 3, a grain unloading control valve 4, a first hydraulic pump 5 and a second hydraulic pump 6.

[0030] In the following description, reference will be made to Figure 1 The specific structure of the above components of the hydraulic system for lifting and unloading grain for a corn harvester and the connection relationship of the above components are specifically described.

[0031] like Figure 1 As shown, in the embodiment, the lifting cylinder 1 is used to drive the grain bin of the corn machine to lift and fall, and the grain unloading cylinder 2 is used to drive the grain bin of the corn machine to flip and retract, so that the corn machine can realize the operation of lifting and unloading grain. The lifting control valve 3 can be connected to the lifting cylinder 1 and the oil tank 7, and the lifting control valve 3 is used to control the lifting cylinder 1 to lift and fall. The grain unloading control valve 4 can be connected to the grain unloading cylinder 2 and the oil tank 7, and the grain unloading cylinder 2 is used to control the grain unloading cylinder 2 to flip and retract. The first hydraulic pump 5 can be connected to the oil tank 7 and the lifting control valve 3 through a pipeline, and the second hydraulic pump 6 can be connected to the oil tank 7 and the grain unloading control valve 4 through a pipeline, that is, the lifting cylinder 1 and the grain unloading cylinder 2 are connected to the oil tank 7 through independent hydraulic pumps, so that the lifting cylinder 1 and the grain unloading cylinder 2 have separate power sources. With this arrangement, the lifting cylinder 1 and the grain unloading cylinder 2 can act simultaneously without affecting each other, and thus can achieve simultaneous compound actions.

[0032] Preferably, Figure 1As shown, in the embodiment, the lift control valve 3 may include a first connection port 31, a second connection port 32, a first oil inlet 33 and a first oil return port 34. Specifically, the first connection port 31 and the second connection port 32 may be the reversing port A1 and the reversing port B1 of the lift control valve 3, the first oil inlet 33 may be the oil inlet P1 of the lift control valve 3, and the first oil return port 34 may be the oil return port T1 of the lift control valve 3. The first connection port 31 and the second connection port 32 of the lift control valve 3 may be connected to the lift cylinder 1 through a pipeline. The first oil inlet 33 of the lift control valve 3 may be connected to the first hydraulic pump 5 through a pipeline. The first oil return port 34 of the lift control valve 3 may be connected to the oil tank 7 through a pipeline.

[0033] More preferably, Figure 1 As shown, in the embodiment, a first three-position four-way reversing valve 301 and a first two-position two-way valve 302 may be provided in the lifting control valve 3. Specifically, the first three-position four-way reversing valve 301 may be connected to the first hydraulic pump 5, and the first three-position four-way reversing valve 301 may be connected to the lifting cylinder 1. The first two-position two-way valve 302 may be connected to the first three-position four-way reversing valve 301. The combined operation of the first three-position four-way reversing valve 301 and the first two-position two-way valve 302 realizes the lifting and lowering of the granary. Such a setting can simplify the connection structure, facilitate installation and maintenance, and reduce costs.

[0034] Preferably, Figure 1 As shown, in the embodiment, the lift control valve 3 may also be provided with a first unloading valve 303. Preferably, the first unloading valve 303 may be provided in parallel with the first two-position two-way valve 302, that is, both ends of the first unloading valve 303 are connected with both ends of the first two-position two-way valve 302. Such a setting can prevent system overload and improve system stability and reliability.

[0035] In addition, preferably, Figure 1 As shown, in an embodiment, the grain unloading control valve 4 may include a third connection port 41, a fourth connection port 42, a second oil inlet 43 and a second oil return port 44. Specifically, the third connection port 41 and the fourth connection port 42 may be the reversing port A2 and the reversing port B2 of the grain unloading control valve 4, the second oil inlet 43 may be the oil inlet P2 of the grain unloading control valve 4, and the second oil return port 44 may be the oil return port T2 of the grain unloading control valve 4. The third connection port 41 and the fourth connection port 42 of the grain unloading control valve 4 may be connected to the grain unloading oil cylinder 2 through a pipeline. The second oil inlet 43 of the grain unloading control valve 4 may be connected to the second hydraulic pump 6 through a pipeline. The second oil return port 44 of the grain unloading control valve 4 may be connected to the oil tank 7 through a pipeline.

[0036] More preferably, Figure 1As shown, in the embodiment, a second three-position four-way reversing valve 401 and a second two-position two-way valve 402 may be provided in the grain unloading control valve 4. Specifically, the second three-position four-way reversing valve 401 may be connected to the second hydraulic pump 6, and the second three-position four-way reversing valve 401 is connected to the grain unloading oil cylinder 2. The second two-position two-way valve 402 may be connected to the second three-position four-way reversing valve 401. Among them, the combined operation of the second three-position four-way reversing valve 401 and the second two-position two-way valve 402 realizes the flipping and retraction of the granary. Such a setting can simplify the connection structure, facilitate installation and maintenance, and reduce costs.

[0037] Preferably, Figure 1 As shown, in the embodiment, the grain unloading control valve 4 may also be provided with a second unloading valve 403. Preferably, the second unloading valve 403 may be provided in parallel with the second two-position two-way valve 402, that is, both ends of the second unloading valve 403 are connected with both ends of the second two-position two-way valve 402. Such a setting can prevent system overload and improve system stability and reliability.

[0038] In addition, preferably, Figure 1 As shown, in the embodiment, a first oil suction filter 50 may be provided between the first hydraulic pump 5 and the oil tank 7, that is, the first hydraulic pump 5 is connected to the first oil suction filter 50 through a pipeline, the first oil suction filter 50 is connected to the oil tank 7, and the first oil suction filter 50 is used to provide clean hydraulic oil for the first hydraulic pump 5. A second oil suction filter 60 may be provided between the second hydraulic pump 6 and the oil tank 7, that is, the second hydraulic pump 6 is connected to the second oil suction filter 60 through a pipeline, the second oil suction filter 60 is connected to the oil tank 7, and the second oil suction filter 60 is used to provide clean hydraulic oil for the second hydraulic pump 6.

[0039] like Figure 1 As shown, the specific operation of the hydraulic system for lifting and unloading grain for the corn machine is as follows:

[0040] When controlling the grain tank lifting action, the first two-position two-way valve 302 is energized, and the b1 solenoid coil 3012 of the first three-position four-way reversing valve 301 of the lifting control valve 3 receives the control signal, and the solenoid valve works in the right position. The hydraulic oil enters the rodless chamber of the lifting cylinder 1 through the second connection port 32 of the first three-position four-way reversing valve 301, driving the grain tank to achieve the lifting action. The hydraulic oil in the rod chamber of the lifting cylinder 1 flows into the first three-position four-way reversing valve 301 through the first connection port 31, and then flows back to the oil tank 7 through the first oil return port 34.

[0041] When the grain box is controlled to fall, the first two-position two-way valve 302 is energized, and the a1 solenoid coil 3011 of the first three-position four-way reversing valve 301 of the lifting control valve 3 receives the control signal, and the solenoid valve works in the left position. The hydraulic oil enters the rod chamber of the lifting cylinder 1 through the first connection port 31 of the first three-position four-way reversing valve 301, driving the grain box to fall. The hydraulic oil in the rod chamber of the lifting cylinder 1 flows into the first three-position four-way reversing valve 301 through the second connection port 32, and then flows back to the oil tank 7 through the first oil return port 34.

[0042] When the grain box flips during the process of controlling the grain unloading action, the second two-position two-way valve 402 is energized, and the b2 electromagnetic coil 4012 of the second three-position four-way reversing valve 401 of the grain unloading control valve 4 receives the control signal, and the electromagnetic valve works in the right position. The hydraulic oil enters the rodless cavity of the grain unloading oil cylinder 2 through the fourth connection port 42 of the second three-position four-way reversing valve 401, driving the grain box to flip. The hydraulic oil in the rod cavity of the grain unloading oil cylinder 2 flows into the second three-position four-way reversing valve 401 through the third connection port 41, and then flows back to the oil tank 7 through the second oil return port 44.

[0043] After the grain is unloaded, when the grain box is controlled to be retracted, the second two-position two-way valve 402 is energized, and the a2 electromagnetic coil 4011 of the second three-position four-way reversing valve 401 of the grain unloading control valve 4 receives the control signal, and the electromagnetic valve works in the left position. The hydraulic oil enters the rod chamber of the grain unloading oil cylinder 2 through the third connection port 41 of the second three-position four-way reversing valve 401, driving the grain box to achieve the retraction action. The hydraulic oil in the rodless chamber of the grain unloading oil cylinder 2 flows into the second three-position four-way reversing valve 401 through the fourth connection port 42, and then flows back to the oil tank 7 through the second oil return port 44.

[0044] In addition, according to the second aspect of the utility model, a corn harvester is provided, which includes the lifting and unloading hydraulic system for the corn harvester as described above.

[0045] During use, the lifting cylinder 1 and the grain unloading cylinder 2 are connected to the oil tank 7 through independent hydraulic pumps, so that the lifting cylinder 1 and the grain unloading cylinder 2 have independent power sources. In this way, the lifting cylinder 1 and the grain unloading cylinder 2 can act at the same time without affecting each other, so that the corn harvester can achieve lifting and unloading compound actions with higher efficiency.

[0046] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A lifting and unloading hydraulic system for corn harvester, characterized in that: The lifting and unloading hydraulic system for the corn machine includes: Lifting cylinder, used to drive the grain bin to lift and lower; A grain unloading oil cylinder, used to drive the grain bin to flip and retract; A lifting control valve connected to the lifting cylinder and the oil tank; A grain unloading control valve connected to the grain unloading oil cylinder and the oil tank; A first hydraulic pump connected to the oil tank and the lift control valve through pipelines; and The second hydraulic pump is connected to the oil tank and the grain unloading control valve through pipelines.

2. The lifting and unloading hydraulic system for corn harvester according to claim 1 is characterized in that: The lifting control valve includes a first connecting port, a second connecting port, a first oil inlet and a first oil return port, the first connecting port and the second connecting port are connected to the lifting cylinder, the first oil inlet is connected to the first hydraulic pump, and the first oil return port is connected to the oil tank.

3. The hydraulic system for lifting and unloading corn harvester according to claim 2 is characterized in that: The lifting control valve is provided with a first three-position four-way reversing valve and a first two-position two-way valve, the first hydraulic pump is connected to the first three-position four-way reversing valve, the first three-position four-way reversing valve is connected to the lifting cylinder, and the first two-position two-way valve is connected to the first three-position four-way reversing valve.

4. The lifting and unloading hydraulic system for corn harvester according to claim 3 is characterized in that: The lift control valve is further provided with a first unloading valve, and the first unloading valve is connected in parallel with the first two-position two-way valve.

5. The lifting and unloading hydraulic system for corn harvester according to claim 1 is characterized in that: The grain unloading control valve includes a third connecting port, a fourth connecting port, a second oil inlet and a second oil return port. The third connecting port and the fourth connecting port are connected to the grain unloading oil cylinder, the second oil inlet is connected to the second hydraulic pump, and the second oil return port is connected to the oil tank.

6. The hydraulic system for lifting and unloading corn harvester according to claim 5 is characterized in that: The grain unloading control valve is provided with a second three-position four-way reversing valve and a second two-position two-way valve, the second hydraulic pump is connected to the second three-position four-way reversing valve, the second three-position four-way reversing valve is connected to the grain unloading oil cylinder, and the second two-position two-way valve is connected to the second three-position four-way reversing valve.

7. The hydraulic system for lifting and unloading corn harvester according to claim 6 is characterized in that: The grain unloading control valve is also provided with a second unloading valve, and the second unloading valve is connected in parallel with the second two-position two-way valve.

8. The hydraulic system for lifting and unloading corn harvester according to claim 1 is characterized in that: A first oil suction filter is provided between the first hydraulic pump and the oil tank.

9. The hydraulic system for lifting and unloading corn harvester according to claim 1, characterized in that: A second oil suction filter is provided between the second hydraulic pump and the oil tank.

10. A corn machine, characterized in that: The corn harvester includes the hydraulic system for lifting and unloading grain for the corn harvester according to any one of claims 1 to 9.

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