Double-pump confluence hydraulic system and corn machine

Abstract

The utility model relates to the field of double-pump confluence hydraulic systems, in particular to a double-pump confluence hydraulic system and a corn machine. A double-pump confluence hydraulic system comprises a hydraulic oil tank used for supplying oil to and returning oil to the whole system; the first electromagnetic valve group is used for communicating with the overturning oil cylinder; the second electromagnetic valve group is used for communicating with the lifting oil cylinder; the first gear pump is communicated with the first electromagnetic valve group; the second gear pump is communicated with the second electromagnetic valve group; and the first reversing valve is used for communicating the liquid inlets of the first electromagnetic valve group and the second electromagnetic valve group. According to the utility model, the first reversing valve is arranged between the overturning hydraulic system consisting of the first gear pump and the first electromagnetic valve group and the lifting hydraulic system consisting of the second gear pump and the second electromagnetic valve group, so that the double-pump confluence function of the two hydraulic systems is realized, and the aim of improving the action speed of the two hydraulic systems is fulfilled; the cost of parts is saved, the working efficiency of the whole machine is improved, and the satisfaction degree of users is improved.

Description

Technical Field

[0001] The utility model relates to the field of double-pump confluence hydraulic systems, in particular to a double-pump confluence hydraulic system and a corn harvester. Background Art

[0002] Corn harvesters are becoming increasingly common, and the requirements for their efficiency are gradually increasing. To better meet drivers' demands for efficient corn cob dumping, many corn harvesters have adopted a two-stage unloading structure that first lifts and then reverses the corn cob box.

[0003] The existing structure is driven by two lifting cylinders and two tilting cylinders to complete the action.

[0004] However, when modifying the existing solution, in order to achieve the situation where the two sets of cylinders for lifting and flipping the fruit cluster box can move separately or simultaneously at the same engine speed, greater power is required, or the cost needs to be increased, or the overall structure volume needs to be increased. It cannot be modified simply and efficiently, and the feasibility is low. Utility Model Content

[0005] The utility model aims to provide a double-pump confluence hydraulic system device, which can realize the situation that two groups of oil cylinders for lifting and turning a fruit ear box can act separately or simultaneously.

[0006] Another object of the present invention is to provide a corn harvester that can increase the speed of the individual actions of the lifting and turning cylinders while maintaining the same engine speed.

[0007] The technical solution of the present utility model is achieved as follows:

[0008] A dual-pump confluence hydraulic system comprising:

[0009] Hydraulic oil tank, used to supply and return oil to the entire system;

[0010] The first solenoid valve group is used to connect to the tilting oil cylinder;

[0011] The second solenoid valve group is used to connect the lifting cylinder;

[0012] a first gear pump, connected to the first solenoid valve group;

[0013] a second gear pump, connected to the second solenoid valve group;

[0014] The first reversing valve is used to connect the liquid inlets of the first solenoid valve group and the second solenoid valve group.

[0015] In a preferred embodiment of the present invention, the first solenoid valve group includes a second reversing valve and a third reversing valve;

[0016] The second reversing valve and the third reversing valve are both connected to the oil return pipeline and the oil inlet pipeline connected to the first gear pump.

[0017] In a preferred embodiment of the present invention, the second solenoid valve group includes a fourth reversing valve and a fifth reversing valve;

[0018] The fourth reversing valve and the fifth reversing valve are both connected to the oil return pipeline and the oil inlet pipeline connected to the second gear pump.

[0019] In a preferred embodiment of the present invention, the dual-pump confluence hydraulic system further includes a controller, which is signal-connected to the first solenoid valve group, the second solenoid valve group, the first gear pump, the second gear pump, and the first reversing valve.

[0020] In a preferred embodiment of the present invention, the first reversing valve is a two-position, two-way electromagnetic reversing valve.

[0021] In a preferred embodiment of the present invention, the first gear pump is connected to a first filter.

[0022] In a preferred embodiment of the present invention, the second gear pump is connected to a second filter.

[0023] A corn harvester comprises the dual-pump confluence hydraulic system described in any one of the above items.

[0024] The beneficial effects of the embodiments of the present utility model are:

[0025] By setting a first reversing valve between the two hydraulic systems, the turning hydraulic system composed of the first gear pump and the first solenoid valve group, and the lifting hydraulic system composed of the second gear pump and the second solenoid valve group, the dual-pump merging function of the two hydraulic systems is realized, thereby improving the action speed of the two hydraulic systems, saving parts costs, improving the working efficiency of the whole machine, and enhancing user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of a dual-pump confluence hydraulic system provided by an embodiment of the present utility model;

[0028] Figure 2A schematic diagram of the oil circuit during acceleration and reversal of the dual-pump confluence hydraulic system provided by an embodiment of the present utility model;

[0029] Figure 3 A schematic diagram of the oil circuit during accelerated lifting of the dual-pump converging hydraulic system provided by an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the oil circuit during normal flipping and normal lifting of the dual-pump converging hydraulic system provided by an embodiment of the utility model.

[0031] In the picture:

[0032] 1-Hydraulic oil tank; 2-First filter; 3-First gear pump; 4-First reversing valve; 5-Multi-way valve; 6-One-way valve; 7-Second gear pump; 8-Second filter; 9-Second reversing valve; 10-Fourth reversing valve; 11-Third reversing valve; 12-Fifth reversing valve. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0038] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0040] A dual pump confluence hydraulic system, such as Figure 1 As shown, it includes: a hydraulic oil tank 1, used for supplying and returning oil to the entire system; a first solenoid valve group, used for connecting to the turning cylinder; a second solenoid valve group, used for connecting to the lifting cylinder; a first gear pump 3, connected to the first solenoid valve group; a second gear pump 7, connected to the second solenoid valve group; a first reversing valve 4, used for connecting the liquid inlets of the first solenoid valve group and the second solenoid valve group.

[0041] Specifically, in this embodiment, the first gear pump 3 and the first solenoid valve group constitute a turning hydraulic system, the second gear pump 7 and the second solenoid valve group constitute a lifting hydraulic system, and the first reversing valve 4 is connected between the turning hydraulic system and the lifting hydraulic system.

[0042] In a preferred embodiment of the present utility model, the first solenoid valve group includes a second reversing valve 9 and a third reversing valve 11;

[0043] The second reversing valve and the third reversing valve 9 are both connected to the oil return pipeline and the oil inlet pipeline connected to the first gear pump 3 .

[0044] Specifically, in this embodiment, the second reversing valve 9 is a two-position, two-way electromagnetic reversing valve, and the fourth reversing valve 11 is a three-position, four-way electromagnetic reversing valve.

[0045] In a preferred embodiment of the present invention, the second solenoid valve group includes a fourth reversing valve 10 and a fifth reversing valve 12;

[0046] The fourth reversing valve 10 and the fifth reversing valve 12 are both connected to the oil return pipeline and the oil inlet pipeline connected to the second gear pump 7 .

[0047] Specifically, in this embodiment, the fourth reversing valve 10 is a two-position, two-way electromagnetic reversing valve, and the fifth reversing valve 12 is a three-position, four-way electromagnetic reversing valve.

[0048] In a preferred embodiment of the present invention, the dual-pump confluence hydraulic system further includes a controller, which is signal-connected to the first solenoid valve group, the second solenoid valve group, the first gear pump 3 , the second gear pump 7 and the first reversing valve 4 .

[0049] In a preferred embodiment of the present invention, the first reversing valve 4 is a two-position, two-way electromagnetic reversing valve.

[0050] In a preferred embodiment of the present invention, the first gear pump 3 is connected to the first filter 2 .

[0051] In a preferred embodiment of the present invention, the second gear pump 7 is connected to a second filter 8 .

[0052] In this embodiment, the first filter 2 and the second filter 8 are both oil suction filters.

[0053] In a preferred embodiment of the present invention, a first filter 2 is provided between the first gear pump 3 and the hydraulic oil tank 1 , and a second filter 8 is provided between the second gear pump 7 and the hydraulic oil tank 1 .

[0054] Specific working principle:

[0055] The single action unloading and turning cylinder, under normal circumstances:

[0056] like Figure 4 As shown, when the grain unloading and turning cylinder is required to push the ear box to realize the turning action, the first reversing valve 4 has no control signal, the valve core function of the first reversing valve 4 works in the initial position, and the oil passages on both sides of the first reversing valve 4 are cut off.

[0057] The pressure oil output by the first gear pump 3 enters the multi-way valve 5 through the P port and is connected to the oil port of the second reversing valve 9 through the internal oil channel. At this time, the coil of the second reversing valve 9 is energized, the valve core function operates in the potential function, and the oil cannot pass through the second reversing valve 9 and then return to the hydraulic oil tank 1 from the T port through the internal oil channel. At this time, the left coil of the second reversing valve 9 is energized, the valve core function operates in the left function, and the pressure oil passes through the second reversing valve 9 and the right hydraulic control one-way valve into the rodless chamber of the grain unloading and turning cylinder, pushing the cylinder rod to extend, pushing the fruit ear box to achieve the turning action. At this time, the oil in the cylinder chamber of the grain unloading and turning cylinder passes through the left hydraulic control one-way valve, then through the second reversing valve 9, through the internal oil channel, and returns to the hydraulic oil tank 1 from the multi-way valve 5 port.

[0058] When the unloading cylinder needs to be turned over quickly:

[0059] like Figure 2 As shown, at this time, the hydraulic system works in the dual-pump confluence working condition: the first reversing valve 4 receives a control signal, the valve core function of the first reversing valve 4 works in the energized position, and the oil circuits on both sides of the first reversing valve 4 are in a passage state.

[0060] The first gear pump 3 outputs pressure oil, which enters the multi-way valve 5 through the P port. The second gear pump 7 outputs pressure oil, which enters the one-way valve 6 group through the P port. At this time, the fourth reversing valve 10 receives an electrical signal, and the valve core function works in the energized position. The oil cannot pass through the fourth reversing valve 10 through the internal oil channel and return to the hydraulic oil tank 1 through the T port. At this time, there is no electrical signal on both sides of the fifth reversing valve 12, the valve core function works in the middle position, and the oil cannot pass through the fifth reversing valve 12.

[0061] Therefore, in this case, the oil output by the second gear pump 7 all passes through the pipeline of the first reversing valve 4, enters the valve body from the P port of the multi-way valve 5, and merges with the oil output by the first gear pump 3.

[0062] At this time, the second reversing valve 9 receives the control signal, and the valve core function of the second reversing valve 9 works in the energized position. The combined oil entering the P port cannot pass through the second reversing valve 9 and return to the hydraulic oil tank 1 from the T port through the internal oil channel.

[0063] At this time, the left coil of the second reversing valve 9 is energized, and the valve core function of the second reversing valve 9 works in the left function. The combined oil passes through the second reversing valve 9 and enters the rodless chamber of the grain unloading and turning cylinder through the right hydraulic control one-way valve, pushing the cylinder rod to extend, and pushing the fruit ear box to realize the turning action.

[0064] At this time, the merged oil is the output flow of the first gear pump 3 and the second gear pump 7 at a certain engine speed, which is higher than the output flow of the first gear pump 3 at the same engine speed, thereby accelerating the extension speed of the grain unloading and turning cylinder in the merged state, thereby improving work efficiency.

[0065] Under normal circumstances, the lifting cylinder for grain unloading can be operated independently:

[0066] like Figure 4 As shown, when the grain unloading and lifting cylinder is required to lift the fruit box, the first reversing valve 4 loses its control signal, and its spool functions in its initial position, shutting off the oil flow on both sides of the first reversing valve 4. The pressurized oil output by the second gear pump 7 enters the check valve 6 group through port P and is then connected to the oil port of the fourth reversing valve 10 via an internal oil passage. At this point, the coil of the fourth reversing valve 10 is energized, and its spool functions in its potentiometric position, preventing oil from passing through the fourth reversing valve 10 and returning to the hydraulic tank 1 via port T through the internal oil passage. At this point, the right coil of the fifth reversing valve 12 is energized, and its spool functions in its right position. Pressurized oil flows through the fifth reversing valve 12, through the right hydraulically controlled check valve, and into the rodless chamber of the grain unloading and tilting cylinder, pushing the cylinder rod to extend, thereby lifting the fruit box. At this time, the oil inside the cylinder cavity of the grain unloading and turning cylinder passes through the left hydraulic control one-way valve, then through the fifth reversing valve 12 and the internal oil channel, and returns to the hydraulic oil tank 1 from the T port of the one-way valve 6 group.

[0067] When the lifting cylinder for unloading grain is operated independently and needs to be accelerated, the hydraulic system works in the dual-pump confluence condition:

[0068] like Figure 3 As shown, the first reversing valve 4 receives a control signal, the valve core function of the first reversing valve 4 works in the energized position, and the oil circuits on both sides of the first reversing valve 4 are in a passage state.

[0069] The second gear pump 7 outputs pressure oil, which enters the one-way valve 6 group through the P port. The first gear pump 3 outputs pressure oil, which enters the multi-way valve 5 through the P port. At this time, the second reversing valve 9 receives an electrical signal, and the valve core function of the second reversing valve 9 works in the energized position. The oil cannot pass through the second reversing valve 9 through the internal oil channel and return to the hydraulic oil tank 1 through the T port. At this time, there is no electrical signal on both sides of the second reversing valve 9, the valve core function works in the middle position, and the oil cannot pass through the second reversing valve 9.

[0070] In this case, the oil output by the first gear pump 3 all passes through the first reversing valve 4 through the pipeline, enters the valve body from the P port of the one-way valve 6 group, and merges with the oil output by the second gear pump 7.

[0071] At this time, the fourth reversing valve 10 receives the control signal, and the valve core function of the fourth reversing valve 10 works in the energized position. The combined oil entering from the P port cannot pass through the internal oil channel of the fourth reversing valve 10 and return to the hydraulic oil tank 1 from the T port.

[0072] At this time, the right coil of the fifth reversing valve 12 is energized, and the valve core function of the fifth reversing valve 12 works on the right side. The combined oil passes through the fifth reversing valve 12 and enters the rodless chamber of the grain unloading lifting cylinder through the right hydraulic control one-way valve, pushing the cylinder rod to extend, and pushing the fruit ear box to realize the lifting action.

[0073] At this time, the combined oil is the output flow of the first gear pump 3 and the second gear pump 7 at a certain engine speed, which is higher than the output flow of the second gear pump 7 at the same engine speed, thereby accelerating the extension speed of the unloading lifting cylinder in the combined state, thereby improving work efficiency.

[0074] A corn harvester comprises the dual-pump confluence hydraulic system described in any one of the above items.

[0075] The beneficial effects of the embodiments of the present utility model are:

[0076] By arranging the first reversing valve 4 between the two hydraulic systems, namely the turning hydraulic system composed of the first gear pump 3 and the first solenoid valve group and the lifting hydraulic system composed of the second gear pump 7 and the second solenoid valve group, the dual-pump merging function of the two hydraulic systems is realized, thereby improving the action speed of the two hydraulic systems, saving component costs, improving the working efficiency of the whole machine, and improving user satisfaction.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dual-pump confluence hydraulic system, characterized in that: include: Hydraulic oil tank, used to supply and return oil to the entire system; The first solenoid valve group is used to connect to the tilting oil cylinder; The second solenoid valve group is used to connect the lifting cylinder; a first gear pump, connected to the first solenoid valve group; a second gear pump, connected to the second solenoid valve group; The first reversing valve is used to connect the liquid inlets of the first solenoid valve group and the second solenoid valve group.

2. The dual-pump confluence hydraulic system according to claim 1, characterized in that: The first solenoid valve group includes a second reversing valve and a third reversing valve; The second reversing valve and the third reversing valve are both connected to the oil return pipeline and the oil inlet pipeline connected to the first gear pump.

3. The dual-pump confluence hydraulic system according to claim 1, characterized in that: The second solenoid valve group includes a fourth reversing valve and a fifth reversing valve; The fourth reversing valve and the fifth reversing valve are both connected to the oil return pipeline and the oil inlet pipeline connected to the second gear pump.

4. The dual-pump confluence hydraulic system according to claim 1, characterized in that: The system further includes a controller connected to the first solenoid valve group, the second solenoid valve group, the first gear pump, the second gear pump and the first reversing valve by signal.

5. The dual-pump confluence hydraulic system according to claim 1, characterized in that: The first reversing valve is a two-position, two-way electromagnetic reversing valve.

6. The dual-pump confluence hydraulic system according to claim 1, characterized in that: The first gear pump is connected to a first filter.

7. The dual-pump confluence hydraulic system according to claim 1, characterized in that: The second gear pump is connected to a second filter.

8. A corn machine, characterized in that: A dual-pump confluence hydraulic system comprising the one of claims 1 to 7.

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