Hydraulic system with sequential action and self-propelled corn machine

Abstract

The utility model relates to the field of agricultural machinery, in particular to a hydraulic system with sequential action and a self-propelled corn machine. The utility model provides a hydraulic system with sequential actions. The hydraulic system comprises a hydraulic oil tank, a hydraulic pump, a multi-way valve, a first sequence valve, an offset oil cylinder group and a turnover oil cylinder group, the hydraulic oil tank and the hydraulic pump are communicated with one side of the multi-way valve; a first liquid outlet of the multi-way valve is communicated with the first sequence valve and a liquid inlet of the offset oil cylinder group; a liquid outlet of the first sequence valve is communicated with a liquid inlet of the overturning oil cylinder group; and liquid outlets of the turnover oil cylinder group and the offset oil cylinder group are communicated with a second liquid outlet of the multi-way valve. The embodiment of the utility model has the beneficial effects that the shifting action and the overturning action of the granary are distributed and carried out in sequence, so that the interference between the granary and other components can be reduced, the occupied space is reduced, and the space utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and more particularly, to a hydraulic system with sequential actions and a self-propelled corn harvester. Background Art

[0002] With the increasingly wide application of self-propelled corn harvesters, users' demands for harvesting scenarios are becoming more and more diverse. Based on the existing models in the market, major manufacturers have also developed models that can harvest both corn ears and corn stalks.

[0003] If the grain bin and the straw box are concentrated on a single self-propelled corn harvester at the same time, due to space limitations, the husker or other relatively large structural components may need to be placed side by side with the grain bin. However, such an arrangement may cause interference between the grain bin and other structural components when the grain bin is flipped. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydraulic system with sequential actions and a self-propelled corn harvester, which can solve the above technical problems.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In a first aspect, the present invention provides a hydraulic system with sequential actions, including a hydraulic oil tank, a hydraulic pump, a multi-way valve, a first sequence valve, an offset cylinder group, and a tipping cylinder group;

[0007] The hydraulic oil tank, the hydraulic pump, and one side of the multi-way valve are connected;

[0008] The first liquid outlet of the multi-way valve is connected to the first sequence valve and the inlet of the offset cylinder group;

[0009] The liquid outlet of the first sequence valve is connected to the inlet of the tipping cylinder group;

[0010] The outlets of the tipping cylinder group and the offset cylinder group are both connected to the second liquid outlet of the multi-way valve.

[0011] In an optional embodiment, a one-way throttle valve is provided at the first liquid outlet of the multi-way valve;

[0012] The liquid outlet of the one-way throttle valve is connected to the first sequence valve and the inlet of the offset cylinder group.

[0013] In an optional embodiment, the multi-way valve includes a relief valve, an enable valve, and a reversing valve;

[0014] The relief valve, the enable valve, and the reversing valve are arranged in parallel in sequence.

[0015] In an optional embodiment, the reversing valve is a three-position four-way valve.

[0016] In an alternative embodiment, a filter is provided between the hydraulic pump and the multi-way valve.

[0017] In an alternative embodiment, the set pressure of the first sequence valve is 120 bar.

[0018] In an alternative embodiment, a second sequence valve is further included. The inlet of the second sequence valve is connected to the outlet of the offset cylinder group, and the outlet of the second sequence valve is connected to the second outlet of the multi-way valve.

[0019] In an alternative embodiment, the set pressure of the second sequence valve is greater than the set pressure of the first sequence valve.

[0020] In an alternative embodiment, the offset cylinder group includes a plurality of offset cylinders arranged in parallel;

[0021] The tipping cylinder group includes a plurality of tipping cylinders arranged in parallel.

[0022] In a second aspect, the present invention provides a self-propelled corn harvester, including the hydraulic system according to any one of the foregoing embodiments.

[0023] The beneficial effects of the embodiments of the present invention are as follows:

[0024] The offset movement and tipping movement of the grain bin are distributed and carried out in sequence, so as to reduce the interference between the grain bin and other components, reduce the space occupation, and improve the space utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of a hydraulic system with sequential actions provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of a hydraulic system with sequential actions provided by another embodiment of the present invention.

[0028] Reference numerals: 1 - hydraulic oil tank; 2 - hydraulic pump; 3 - filter; 4 - multi-way valve; 4-1 - reversing valve; 4-2 - overflow valve; 4-3 - enable valve; 5 - one-way throttle valve; 6 - first sequence valve; 7 - offset cylinder group; 8 - tipping cylinder group; 9 - second sequence valve. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0034] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] The following will describe in detail some embodiments of the present invention in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0036] In a first aspect, the present utility model provides a hydraulic system with sequential actions, as Figure 1 and Figure 2 shown, which includes a hydraulic oil tank 1, a hydraulic pump 2, a multi-way valve 4, a first sequence valve 6, an offset oil cylinder group 7, and a tipping oil cylinder group 8; the hydraulic oil tank 1, the hydraulic pump 2, and one side of the multi-way valve 4 are connected; the first liquid outlet of the multi-way valve 4 is connected to the inlet of the first sequence valve 6 and the inlet of the offset oil cylinder group 7; the liquid outlet of the first sequence valve 6 is connected to the inlet of the tipping oil cylinder group 8; the liquid outlets of the tipping oil cylinder group 8 and the offset oil cylinder group 7 are both connected to the second liquid outlet of the multi-way valve 4.

[0037] In this embodiment, the first sequence valve 6 is used to apply an action sequence to the offset oil cylinder group 7 and the tipping oil cylinder group 8, so that the offset oil cylinder group 7 operates first to drive the grain bin to offset, and then the tipping oil cylinder group 8 operates to drive the grain bin to tip.

[0038] In this embodiment, the offset oil cylinder group 7 includes a plurality of offset oil cylinders arranged in parallel; the tipping oil cylinder group 8 includes a plurality of tipping oil cylinders arranged in parallel.

[0039] In this embodiment, the bore diameter of the offset oil cylinder is 70 mm, the rod diameter is 50 mm, the bore diameter of the tipping oil cylinder is 70 mm, and the rod diameter is 40 mm. That is, the bore diameters of the two groups of oil cylinders are the same, and the rod diameter of the offset oil cylinder is larger than that of the tipping oil cylinder.

[0040] As Figure 1 shown, the specific working principle of the hydraulic system is as follows:

[0041] First, when the key is pressed to execute the grain unloading action under the full load and idle speed conditions, the pressure in front of the first sequence valve 6 is measured, that is, the pressure in the rodless cavity of the offset oil cylinder in the offset oil cylinder group 7 of the grain bin is about 16 - 70 bar, and its pressure increases instantaneously and then decreases as a whole. The pressure behind the first sequence valve 6 is measured, that is, the pressure in the rodless cavity of the tipping oil cylinder in the tipping oil cylinder group 8 of the grain bin is about 25 - 60 bar, and its pressure first increases and then decreases; when the key is pressed to execute the grain unloading action under the full load and high speed conditions, the pressure in front of the first sequence valve 6 is measured, that is, the pressure in the rodless cavity of the offset oil cylinder in the offset oil cylinder group 7 of the grain bin is about 16 - 120 bar, and its pressure increases instantaneously and then decreases as a whole. The pressure behind the first sequence valve 6 is measured, that is, the pressure in the rodless cavity of the tipping oil cylinder in the tipping oil cylinder group 8 of the grain bin is about 16 - 120 bar, and its pressure first increases and then decreases.

[0042] Since the effective operating pressures of the rodless chambers of the two sets of hydraulic cylinders overlap, in order to ensure the orderly progression of the operations, a first sequence valve 6 needs to be installed at the rodless chamber oil circuit ends of the hydraulic cylinders in the offset hydraulic cylinder group 7 and the tipping hydraulic cylinder group 8. The pressure of the first sequence valve 6 should be set at 120 bar, so that it can ensure that when the grain bin performs the grain unloading operation, it first performs the offset operation to avoid other structural components and then performs the tipping operation.

[0043] Then, when performing the reset operation of the grain bin, due to the presence of the one-way throttle valve 5, there will be a relatively large back pressure in the rodless chambers of the offset hydraulic cylinder group 7 of the grain bin and the tipping hydraulic cylinder group 8 of the grain bin. Therefore, the pressure in the rod chambers of the offset hydraulic cylinder and the tipping hydraulic cylinder is relatively large. Under idling conditions, when the measured pressure in the rod chamber of the tipping hydraulic cylinder of the grain bin is about 130 bar, the grain bin will first perform the reset operation of the tipping hydraulic cylinder, and when the measured pressure in the rod chamber of the offset hydraulic cylinder of the grain bin is about 140 bar, the reset operation of the offset hydraulic cylinder will be performed.

[0044] Under high-speed conditions, when the measured pressure in the rod chamber of the tipping hydraulic cylinder of the grain bin is about 145 bar, the grain bin will first perform the reset operation of the tipping hydraulic cylinder, and when the measured pressure in the rod chamber of the offset hydraulic cylinder of the grain bin is about 150 bar, the reset operation of the offset hydraulic cylinder will be performed.

[0045] Therefore, when performing the reset operation of the grain bin, there is no need to install a sequence valve at the rod chamber oil circuit ends of the offset hydraulic cylinder and the tipping hydraulic cylinder, and the reset operation of the tipping hydraulic cylinder can be performed first and then the reset operation of the offset hydraulic cylinder. This is because the cylinder diameters of the offset hydraulic cylinder and the tipping hydraulic cylinder of the grain bin are the same, while the rod diameter of the offset hydraulic cylinder is larger than that of the tipping hydraulic cylinder. When performing the reset operation, the effective acting area of the rod chamber of the offset hydraulic cylinder is smaller than that of the rod chamber of the tipping hydraulic cylinder. Only by providing a relatively large pressure to the rod chamber side of the offset hydraulic cylinder can the reset operation be performed.

[0046] In an alternative embodiment, the multi-way valve 4 includes a relief valve 4-2, an enable valve 4-3, and a directional control valve 4-1; the relief valve 4-2, the enable valve 4-3, and the directional control valve 4-1 are arranged in parallel in sequence.

[0047] In this embodiment, the setting pressure of the relief valve 4-2 is 160 bar.

[0048] In an alternative embodiment, the directional control valve 4-1 is a three-position four-way valve.

[0049] In an alternative embodiment, a filter 3 is provided between the hydraulic pump 2 and the multi-way valve 4.

[0050] By providing the filter 3, the cleanliness of the hydraulic oil can be ensured, preventing impurities from entering the oil circuit, thereby ensuring the stability and service life of the overall hydraulic system.

[0051] In this embodiment, there are many choices for the filter 3.

[0052] Such as an oil filter 3, a screen filter 3, a paper filter 3, a magnetic filter 3, a synthetic resin filter 3, a stainless steel filter 3, a micro-porous plastic filter 3, etc., as long as it can achieve the filtration of hydraulic oil.

[0053] In an alternative embodiment, the set pressure of the first sequence valve 6 is 120 bar.

[0054] In this embodiment, the hydraulic pump 2 sucks hydraulic oil from the hydraulic oil tank 1 through a hydraulic pipeline and supplies it to the entire hydraulic system. The filter 3 can meet the cleanliness requirements of the hydraulic system. The multi-way valve 4 is used to control whether the hydraulic oil enters the rodless cavity or the rod cavity of the offset cylinder and the tipping cylinder to achieve the offset, tipping, and reset actions of the grain bin. The one-way throttle valve 5 is used to ensure the smoothness and timeliness of the offset, tipping, and reset actions of the grain bin. The first sequence valve 6 with a set pressure of 120 bar is set to achieve the two-stage sequence action of the grain bin.

[0055] In an alternative embodiment, as Figure 2 shown, it further includes a second sequence valve 9. The liquid inlet of the second sequence valve 9 is connected to the liquid outlet of the offset cylinder group 7, and the liquid outlet of the second sequence valve 9 is connected to the second liquid outlet of the multi-way valve 4.

[0056] By setting the second sequence valve 9, the cylinder operation sequence of the grain bin can be further ensured, that is, first offset, and then tip.

[0057] Specifically, in this embodiment, the first sequence valve 6 and the second sequence valve 9 are symmetrically arranged at both ends of the tipping cylinder group 8, that is, the first sequence valve 6 is connected to the rodless cavities of the offset cylinder group 7 and the tipping cylinder group 8, and the second sequence valve 9 is connected to the rod cavities of the offset cylinder group 7 and the tipping cylinder group 8.

[0058] In an alternative embodiment, the set pressure of the second sequence valve 9 is greater than the set pressure of the first sequence valve 6.

[0059] In this embodiment, the pressure setting range of the second sequence valve 9 is: above 145 bar.

[0060] The preferred value is 145 bar or 150 bar.

[0061] In a second aspect, the present invention provides a self-propelled corn harvester, including the hydraulic system according to any one of the foregoing embodiments.

[0062] The beneficial effects of the embodiments of the present invention are:

[0063] The offset movement and flipping movement of the granary are distributed and carried out in sequence, so that the interference between the granary and other components can be reduced, the space occupation can be reduced, and the space utilization rate can be improved.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydraulic system with sequential action, characterized in that: It includes a hydraulic oil tank, a hydraulic pump, a multi-way valve, a first sequence valve, an offset cylinder group and a tilt cylinder group; The hydraulic oil tank, the hydraulic pump and one side of the multi-way valve are in communication; The first liquid outlet of the multi-way valve is connected to the liquid inlet of the first sequence valve and the offset cylinder group; The liquid outlet of the first sequence valve is connected to the liquid inlet of the overturning cylinder group; The liquid outlets of the tilting oil cylinder group and the offset oil cylinder group are both connected to the second liquid outlet of the multi-way valve.

2. The hydraulic system according to claim 1, characterized in that: A one-way throttle valve is provided at the first liquid outlet of the multi-way valve; The liquid outlet of the one-way throttle valve is connected to the liquid inlet of the first sequence valve and the offset cylinder group.

3. The hydraulic system according to claim 1, characterized in that: The multi-way valve comprises a relief valve, an enabling valve and a reversing valve; The overflow valve, the enabling valve and the reversing valve are sequentially arranged in parallel.

4. The hydraulic system according to claim 3, characterized in that: The reversing valve is a three-position four-way valve.

5. The hydraulic system according to claim 1, characterized in that: A filter is arranged between the hydraulic pump and the multi-way valve.

6. The hydraulic system according to claim 1, characterized in that: The set pressure of the first sequence valve is 120 bar.

7. The hydraulic system according to claim 1, characterized in that: It also includes a second sequence valve, wherein a liquid inlet of the second sequence valve is connected to a liquid outlet of the offset cylinder group, and a liquid outlet of the second sequence valve is connected to a second liquid outlet of the multi-way valve.

8. The hydraulic system according to claim 7, characterized in that: The setting pressure of the second sequence valve is greater than the setting pressure of the first sequence valve.

9. The hydraulic system according to claim 1, characterized in that: The offset cylinder group includes a plurality of offset cylinders arranged in parallel; The turning cylinder group includes a plurality of turning cylinders arranged in parallel.

10. A self-propelled corn harvester, characterized in that: A hydraulic system comprising any one of claims 1-9.

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