Reel lifting hydraulic system and reel lifting structure

Abstract

The utility model relates to the technical field of reels, in particular to a reel lifting hydraulic system and a reel lifting structure, and the reel lifting hydraulic system structurally comprises an oil tank; the hydraulic pump is connected with the oil tank through a pipeline; the electromagnetic multi-way valve is connected with the hydraulic pump and the oil tank through pipelines; the driving piston cylinder is connected with the electromagnetic multi-way valve through a pipeline, and the driving piston cylinder is used for driving the middle part of a reel; the driven piston cylinders are connected with the driving piston cylinder through pipelines; and the plurality of plunger cylinders are respectively connected with the plurality of driven piston cylinders through pipelines, and the plurality of plunger cylinders are used for driving the two ends of the reel. The reel lifting hydraulic system and the reel lifting structure can solve the problem that an existing reel structure and an oil cylinder connecting mode are not suitable for a large harvester.

Description

Technical Field

[0001] The present application relates to the technical field of reels, and in particular to a reel lifting hydraulic system and a reel lifting structure. Background Art

[0002] The reel lifting and lowering hydraulic system is an essential component of wheat harvesters. Currently, the reels of small and medium-sized wheat harvesters in the industry generally use a one-piece reel. This system uses a piston cylinder connected in series with a plunger cylinder on either side of the reel. Because the effective area of ​​the piston in the rod chamber of the piston cylinder is equal to the effective area of ​​the plunger in the plunger cylinder, the two reel cylinders can be controlled to extend and retract synchronously.

[0003] However, on large harvesters, the size of the harvesting platform is generally larger. If the existing reel structure and oil cylinder connection are still used, the reel beam will be deformed, affecting the dynamic balance of the reel and the feeding effect of the harvesting platform. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a reel lifting hydraulic system and a reel lifting structure to solve the problem that the existing reel structure and cylinder connection form are not suitable for large harvesters.

[0005] According to a first aspect of the present invention, a reel lifting hydraulic system is provided, wherein the reel lifting hydraulic system includes: an oil tank; a hydraulic pump connected to the oil tank through a pipeline; an electromagnetic multi-way valve connected to the hydraulic pump and the oil tank through a pipeline; an active piston cylinder connected to the electromagnetic multi-way valve through a pipeline, the active piston cylinder being used to drive the middle portion of the reel; a plurality of slave piston cylinders connected to the active piston cylinder through pipelines; and a plurality of plunger cylinders respectively connected to the plurality of slave piston cylinders through pipelines, the plurality of plunger cylinders being used to drive both ends of the reel.

[0006] Preferably, the multiple slave piston cylinders include: a first slave piston cylinder, the rodless chamber of the first slave piston cylinder is connected to the rod chamber of the active piston cylinder; and a second slave piston cylinder, the rodless chamber of the second slave piston cylinder is connected to the rod chamber of the active piston cylinder.

[0007] Preferably, the plurality of plunger cylinders include: a first plunger cylinder, the rodless chamber of the first plunger cylinder is connected to the rod chamber of the first slave piston cylinder, the first plunger cylinder is used to drive the first end of the reel; and a second plunger cylinder, the rodless chamber of the second plunger cylinder is connected to the rod chamber of the second slave piston cylinder, the second plunger cylinder is used to drive the second end of the reel.

[0008] Preferably, the first slave piston cylinder and the second slave piston cylinder have the same structure, and the first plunger cylinder and the second plunger cylinder have the same structure; the effective working area of ​​the rod chamber of the active piston cylinder is twice the working area of ​​the rodless chamber of the first slave piston cylinder, and the effective working area of ​​the rod chamber of the first slave piston cylinder is equal to the radial cross-sectional area of ​​the rodless chamber of the first plunger cylinder.

[0009] Preferably, the electromagnetic multi-way valve includes an oil inlet, an oil return port, a first connecting port and a second connecting port, the first connecting port is connected to the active piston cylinder, a hydraulic lock is provided at the second connecting port, the oil inlet is connected to the hydraulic pump, and the oil return port is connected to the oil tank through a pipeline.

[0010] Preferably, a three-position four-way reversing valve is provided in the electromagnetic multi-way valve, the hydraulic pump is connected to the three-position four-way reversing valve, and the three-position four-way reversing valve is connected to the active piston cylinder.

[0011] Preferably, the reel lifting hydraulic system further includes a throttle valve, and the throttle valve is provided between the first connecting port and the active piston cylinder.

[0012] According to a second aspect of the present invention, a reel lifting structure is provided, wherein the reel lifting structure applies the reel lifting hydraulic system described above.

[0013] Preferably, the reel lifting structure includes: a reel, including a first segment and a second segment arranged in the axial direction; a first cylinder bracket, arranged between the first segment and the second segment, the active piston cylinder, the first slave piston cylinder and the second slave piston cylinder being mounted on the first cylinder bracket for driving the middle portion of the reel; a second cylinder bracket, arranged at an end of the first segment away from the second segment, the first plunger cylinder being mounted on the second cylinder bracket for driving the first end of the reel; and a third cylinder bracket, arranged at an end of the second segment away from the first segment, the second plunger cylinder being mounted on the third cylinder bracket for driving the second end of the reel.

[0014] Preferably, the reel lifting structure further includes a cutting platform, the active piston cylinder, the first plunger cylinder and the second plunger cylinder are pivotally mounted on the cutting platform, and the first slave piston cylinder and the second slave piston cylinder are mounted on the cutting platform via a cutting platform bracket.

[0015] The hydraulic system and structure for lifting the reel of the embodiment of the utility model are characterized in that the hydraulic pump is connected to the oil tank via a pipeline. The electromagnetic multi-way valve is connected to the hydraulic pump and the oil tank via a pipeline. The active piston cylinder is connected to the electromagnetic multi-way valve via a pipeline, and the active piston cylinder is used to drive the middle part of the reel. Multiple slave piston cylinders are connected to the active piston cylinder via a pipeline. Multiple plunger cylinders are respectively connected to multiple slave piston cylinders via a pipeline. The multiple plunger cylinders are used to drive both ends of the reel. In this way, the active piston cylinder drives multiple plunger cylinders to drive the middle part and both ends of the reel respectively, thereby increasing the fulcrum of the reel and avoiding deformation of the reel. This can effectively solve the problem that the existing reel structure and oil cylinder connection form are not suitable for large harvesters.

[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 given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of a reel lifting hydraulic system according to the utility model.

[0019] Figure 2 It is a schematic diagram of the reel lifting structure according to the utility model.

[0020] Figure 3 It is a schematic diagram of a portion of the reel lifting structure according to the present invention.

[0021] Figure markings: 1-oil tank; 2-hydraulic pump; 3-electromagnetic multi-way valve; 30-three-position four-way reversing valve; 301-first electromagnet; 302-second electromagnet; 31-first connecting port; 32-second connecting port; 33-oil inlet; 34-oil return port; 35-hydraulic lock; 36-throttle valve; 4-active piston cylinder; 51-first slave piston cylinder; 52-second slave piston cylinder; 61-first plunger cylinder; 62-second plunger cylinder; 7-reel; 71-first section; 72-second section; 81-first oil cylinder bracket; 82-second oil cylinder bracket; 83-third oil cylinder bracket; 9-cutting platform. DETAILED DESCRIPTION

[0022] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0023] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0024] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” 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 coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0025] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0026] 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 used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0027] 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 encompass different orientations of the device in use or operation in addition to the orientations 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 would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," 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.

[0028] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0029] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0030] The features of the examples described herein can 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.

[0031] like Figures 1 to 3 As shown, according to a first aspect of the present invention, a reel lifting hydraulic system is provided, which includes an oil tank 1, a hydraulic pump 2, an electromagnetic multi-way valve 3, an active piston cylinder 4, a plurality of slave piston cylinders and a plurality of plunger cylinders.

[0032] In the following description, reference will be made to Figures 1 to 3 The specific structures of the above components of the reel lifting hydraulic system and the connection relationships of the above components are described in detail.

[0033] like Figures 1 to 3As shown, in the embodiment, the hydraulic pump 2 and the oil tank 1 can be connected through a pipeline. The electromagnetic multi-way valve 3 can be connected to the hydraulic pump 2 and the oil tank 1 through a pipeline. The active piston cylinder 4 can be connected to the electromagnetic multi-way valve 3 through a pipeline, and the active piston cylinder 4 can be used to drive the middle part of the reel 7. Multiple slave piston cylinders can be connected to the active piston cylinder 4 through a pipeline. Multiple plunger cylinders can be respectively connected to multiple slave piston cylinders through pipelines. The multiple plunger cylinders can be used to drive the two ends of the reel 7. In this way, the active piston cylinder 4 drives the multiple plunger cylinders to drive the middle part and the two ends of the reel 7 respectively, so as to increase the fulcrum of the reel 7 and avoid deformation of the reel 7.

[0034] Preferably, Figures 1 to 3 As shown, in this embodiment, the electromagnetic multi-way valve 3 may include an oil inlet 33, an oil return port 34, a first connection port 31, and a second connection port 32. The first connection port 31 may be connected to the active piston cylinder 4 to supply oil to the active piston cylinder 4. A hydraulic lock 35 may be provided at the second connection port 32. The oil inlet 33 of the electromagnetic multi-way valve 3 may be connected to the hydraulic pump 2 via a pipeline. The oil return port 34 of the electromagnetic multi-way valve 3 may be connected to the oil tank 1 via a pipeline.

[0035] Specifically, such as Figures 1 to 3 As shown, in the embodiment, a three-position four-way reversing valve 30 can be provided in the electromagnetic multi-way valve 3. The hydraulic pump 2 can be connected to the three-position four-way reversing valve 30 for oil supply. The three-position four-way reversing valve 30 can be connected to the active piston cylinder 4. The three-position four-way reversing valve 30 also includes a first electromagnet 301 and a second electromagnet 302. When the first electromagnet 301 is energized, the three-position four-way reversing valve 30 is in the right position, the high-pressure oil circuit is connected to the rodless chamber of the active piston cylinder 4, and the piston rod of the active piston cylinder 4 is extended to drive the middle part of the reel 7. When the second electromagnet 302 is energized, the three-position four-way reversing valve 30 is in the left position, and the oil in the active piston cylinder 4 flows back to the oil tank 1.

[0036] In addition, preferably, Figure 1 As shown, in an embodiment, the reel lifting hydraulic system may further include a throttle valve 36. The throttle valve 36 may be provided on a pipeline connecting the first connecting port 31 and the active piston cylinder 4 to control the flow of the hydraulic oil.

[0037] Preferably, Figures 1 to 3As shown, in this embodiment, the plurality of slave piston cylinders may include a first slave piston cylinder 51 and a second slave piston cylinder 52. The rodless chamber of the first slave piston cylinder 51 may communicate with the rod chamber of the master piston cylinder 4, allowing the oil in the master piston cylinder 4 to enter the first slave piston cylinder 51. Similarly, the rodless chamber of the second slave piston cylinder 52 may also communicate with the rod chamber of the master piston cylinder 4, allowing the oil in the master piston cylinder 4 to enter the second slave piston cylinder 52.

[0038] Further, preferably, Figures 1 to 3 As shown, in the embodiment, the plurality of plunger cylinders may include a first plunger cylinder 61 and a second plunger cylinder 62. The rodless cavity of the first plunger cylinder 61 may be connected to the rod cavity of the first slave piston cylinder 51, so that the oil of the first slave piston cylinder 51 can enter the first plunger cylinder 61. The piston rod of the first plunger cylinder 61 extends to drive the first end of the reel 7 (which may be Figure 2 Similarly, the rodless chamber of the second plunger cylinder 62 can be connected to the rod chamber of the second slave piston cylinder 52, so that the oil in the second slave piston cylinder 52 can enter the second plunger cylinder 62. The piston rod of the second plunger cylinder 62 extends to drive the second end of the reel 7 (which can be Figure 2 right end as shown).

[0039] More preferably, in this embodiment, the structures of the first slave piston cylinder 51 and the second slave piston cylinder 52 can be identical, and the structures of the first plunger cylinder 61 and the second plunger cylinder 62 can be identical. The effective working area of ​​the rod cavity of the master piston cylinder 4 (the radial cross-sectional area of ​​the rod cavity of the master piston cylinder 4 minus the radial cross-sectional area of ​​the piston rod) is twice the working area of ​​the rodless cavity of the first slave piston cylinder 51, and the effective working area of ​​the rod cavity of the first slave piston cylinder 51 (the radial cross-sectional area of ​​the rod cavity of the first slave piston cylinder 51 minus the radial cross-sectional area of ​​the piston rod) is equal to the radial cross-sectional area of ​​the rodless cavity of the first plunger cylinder 61. This configuration allows the piston rods of the master piston cylinder 4, the slave piston cylinder, and the plunger cylinder to extend synchronously, thereby achieving synchronous lifting of the reel 7.

[0040] In addition, if Figure 2 and Figure 3 As shown, according to a second aspect of the present invention, a reel lifting structure is provided, wherein the reel lifting structure applies the reel lifting hydraulic system as described above.

[0041] Preferably, Figure 2 and Figure 3As shown, in an embodiment, the reel lifting structure may include a reel 7, a first cylinder bracket 81, a second cylinder bracket 82, and a third cylinder bracket 83. The reel 7 may be divided into two sections along the axial direction, that is, the reel 7 includes a first section 71 and a second section 72 arranged along the axial direction. The first cylinder bracket 81 may be arranged between the first section 71 and the second section 72 (that is, arranged in the middle of the length direction of the reel 7), and the first cylinder bracket 81 is pivotally connected to the first section 71 and the second section 72 to drive the middle part of the reel 7 to lift. The active piston cylinder 4, the first slave piston cylinder 51, and the second slave piston cylinder 52 may be installed on the first cylinder bracket 81 to drive the first cylinder bracket 81 to move. The second cylinder bracket 82 may be arranged at the end of the first section 71 away from the second section 72 (that is, as shown in FIG. Figure 2 The first piston cylinder 61 can be mounted on the second oil cylinder support 82 to drive the second oil cylinder support 82 to move. The third oil cylinder support 83 can be set at the end of the second segment 72 away from the first segment 71 (i.e., as shown in FIG. Figure 2 The second piston cylinder 62 can be installed on the third oil cylinder bracket 83 to drive the third oil cylinder bracket 83 to move.

[0042] More preferably, Figure 2 and Figure 3 As shown, in an embodiment, the reel lifting structure may further include a cutting table 9. The bottom ends of the active piston cylinder 4, the first plunger cylinder 61, and the second plunger cylinder 62 are pivotally mounted on the upper surface of the cutting table 9. The first slave piston cylinder 51 and the second slave piston cylinder 52 may be mounted on the cutting table 9 via a cutting table 9 bracket (not shown).

[0043] During use, when the reel 7 needs to be lifted, the operator can energize the first electromagnet 301 of the electromagnetic multi-way valve 3 through the electric control handle. When the electromagnet is energized, it pushes the corresponding valve core to move, and the three-position four-way reversing valve 30 is in the right position. The high-pressure oil circuit connects to the rodless chamber of the active piston cylinder 4, and the piston rod of the active piston cylinder 4 extends. The oil in the rod chamber of the active piston cylinder 4 enters the rodless chamber of the first slave piston cylinder 51 and the second slave piston cylinder 52, driving the piston rods of the first slave piston cylinder 51 and the second slave piston cylinder 52 to extend. The oil in the rod chamber of the first slave piston cylinder 51 and the second slave piston cylinder 52 enters the first plunger cylinder 61 and the second plunger cylinder 62, causing the piston rods of the first plunger cylinder 61 and the second plunger cylinder 62 to extend. By controlling the cylinder diameters of the five oil cylinders and the effective areas of the rod chamber and the rodless chamber, the piston rods of the five oil cylinders are extended synchronously to achieve the lifting of the reel 7. When the reel 7 needs to be lowered, the operator uses the electric control handle to energize the second electromagnet 302 of the electromagnetic multi-way valve 3. The electromagnet, when energized, moves the corresponding valve core, placing the three-position, four-way reversing valve 30 in the left position. The weight of the reel 7 presses down on the oil cylinder, causing the piston rods to retract, thus lowering the reel 7.

[0044] 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 scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A reel lifting hydraulic system, characterized in that: The reel lifting hydraulic system includes: tank; a hydraulic pump connected to the oil tank via a pipeline; an electromagnetic multi-way valve connected to the hydraulic pump and the oil tank through pipelines; an active piston cylinder connected to the electromagnetic multi-way valve via a pipeline, the active piston cylinder being used to drive the middle portion of the reel; A plurality of slave piston cylinders connected to the master piston cylinder via pipelines; and A plurality of plunger cylinders are respectively connected to the plurality of slave piston cylinders through pipelines, and the plurality of plunger cylinders are used to drive the two ends of the reel.

2. The reel lifting hydraulic system according to claim 1, characterized in that: The plurality of slave piston cylinders include: a first slave piston cylinder, wherein the rodless chamber of the first slave piston cylinder is in communication with the rod chamber of the master piston cylinder; and A second slave piston cylinder, wherein the rodless chamber of the second slave piston cylinder is communicated with the rod chamber of the master piston cylinder.

3. The reel lifting hydraulic system according to claim 2, characterized in that: The plurality of plunger cylinders include: a first plunger cylinder, a rodless chamber of the first plunger cylinder being in communication with a rod chamber of the first slave piston cylinder, the first plunger cylinder being used to drive the first end of the reel; and The second plunger cylinder has a rodless chamber connected to the rod chamber of the second slave piston cylinder, and the second plunger cylinder is used to drive the second end of the reel.

4. The reel lifting hydraulic system according to claim 3, characterized in that: The first slave piston cylinder has the same structure as the second slave piston cylinder, and the first plunger cylinder has the same structure as the second plunger cylinder; the effective working area of ​​the rod chamber of the active piston cylinder is twice the working area of ​​the rodless chamber of the first slave piston cylinder, and the effective working area of ​​the rod chamber of the first slave piston cylinder is equal to the radial cross-sectional area of ​​the rodless chamber of the first plunger cylinder.

5. The reel lifting hydraulic system according to claim 4, characterized in that: The electromagnetic multi-way valve includes an oil inlet, an oil return port, a first connecting port and a second connecting port. The first connecting port is connected to the active piston cylinder. A hydraulic lock is provided at the second connecting port. The oil inlet is connected to the hydraulic pump, and the oil return port is connected to the oil tank through a pipeline.

6. The reel lifting hydraulic system according to claim 5, characterized in that: A three-position four-way reversing valve is provided in the electromagnetic multi-way valve, the hydraulic pump is connected to the three-position four-way reversing valve, and the three-position four-way reversing valve is connected to the active piston cylinder.

7. The reel lifting hydraulic system according to claim 5, characterized in that: The reel lifting hydraulic system further includes a throttle valve, which is disposed between the first connecting port and the active piston cylinder.

8. A reel lifting structure, characterized in that: The reel lifting structure adopts the reel lifting hydraulic system according to any one of claims 3 to 7.

9. The reel lifting structure according to claim 8, wherein: The reel lifting structure includes: The reel includes a first segment and a second segment arranged in an axial direction; a first oil cylinder support, disposed between the first segment and the second segment, the active piston cylinder, the first slave piston cylinder, and the second slave piston cylinder being mounted on the first oil cylinder support for driving the middle portion of the reel; a second oil cylinder support, disposed at an end of the first segment away from the second segment, the first plunger cylinder being mounted on the second oil cylinder support for driving the first end of the reel; and The third oil cylinder support is provided at the end of the second segment away from the first segment. The second plunger cylinder is installed on the third oil cylinder support and is used to drive the second end of the reel.

10. The reel lifting structure according to claim 9, wherein: The reel lifting structure further includes a cutting platform, the active piston cylinder, the first plunger cylinder and the second plunger cylinder are pivotally mounted on the cutting platform, and the first slave piston cylinder and the second slave piston cylinder are mounted on the cutting platform via a cutting platform bracket.

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