An electric control lifter for tractor and tractor

Abstract

The utility model relates to tractor hoist technology field especially relates to a tractor's electric control hoist and tractor, tractor's electric control hoist's structure includes hoist main part, the hoist main part is provided with the hoist arm that can pivot, the inside of hoist main part is provided with a plurality of oil channel, hoist oil cylinder is set up in the inside of hoist main part, hoist oil cylinder is connected with hoist arm transmission, and electric control distributor is installed in the outside of hoist main part, and electric control distributor is communicated with hoist oil cylinder through oil channel. The tractor's electric control hoist and tractor can solve the problem that the hoist oil cylinder and electric control distributor of external design occupy larger space and need more pipelines.

Description

Technical Field

[0001] This application relates to the field of tractor lift technology, and in particular to an electronically controlled lift for tractors and a tractor. Background Technology

[0002] Currently, in small-horsepower tractors below 25 horsepower, the lifting cylinder and electronic distributor of the electronic lifting device are mostly externally designed, meaning that the lifting cylinder and electronic distributor are completely separated from the lifting device housing and connected by oil pipes.

[0003] This layout occupies a significant amount of space within the tractor and requires numerous pipelines, leading to increased oil leak points and higher costs. This externally mounted lifting cylinder and distributor layout is particularly difficult to apply to smaller new energy tractors, hindering the development of low-horsepower new energy tractors. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an electronically controlled lifting device and tractor for tractors, so as to solve the problems that the externally designed lifting cylinder and electronically controlled distributor occupy a large space and require a lot of pipelines.

[0005] According to a first aspect of the present invention, an electronically controlled lifting device for a tractor is provided, wherein the electronically controlled lifting device for a tractor includes: a lifting device body, on which a pivotable lifting arm is provided, and a plurality of oil passages are opened inside the lifting device body; a lifting cylinder is disposed inside the lifting device body and is throttle-connected to the lifting arm; and an electronically controlled distributor is installed outside the lifting device body, and the electronically controlled distributor is connected to the lifting cylinder through the oil passages.

[0006] Preferably, the lifting device body includes: a housing, in which the oil passage is formed, and the lifting cylinder is installed inside the housing; a lifting shaft passing through the housing, the end of the lifting shaft being splinedly connected to the lifting arm; and a rotating rocker arm pivotally disposed inside the housing, the rotating rocker arm being splinedly connected to the middle part of the lifting shaft, and the rotating rocker arm being drively connected to the lifting cylinder.

[0007] Preferably, the lifting cylinder includes: a cylinder barrel disposed within the housing, the cylinder barrel communicating with the oil passage; a cylinder piston disposed within the cylinder barrel, the cylinder piston capable of moving axially along the cylinder barrel under hydraulic pressure; and a cylinder piston rod, the first end of the cylinder piston rod being connected to the cylinder piston, and the second end of the cylinder piston rod being pivotally connected to the rotating rocker arm.

[0008] Preferably, the first side of the housing is provided with a main body oil inlet and a boss portion, the boss portion is provided with a connecting oil port, and the main body oil inlet is connected to the connecting oil port through the oil passage.

[0009] Preferably, the electronically controlled distributor is installed on the boss portion of the housing, and the electronically controlled distributor is provided with a distributor inlet, which is connected to the connecting oil port.

[0010] Preferably, the second side of the housing is provided with a cylinder inlet, which is connected to the cylinder barrel through the oil passage, and the electronically controlled distributor is provided with a distributor outlet, which is connected to the cylinder inlet through a pipeline.

[0011] Preferably, an oil tank is provided inside the housing, a first oil return port is provided on the boss portion, the first oil return port is connected to the oil tank through the oil passage, and the electronically controlled distributor is provided with a first distributor oil return port, which is connected to the first oil return port.

[0012] Preferably, the boss portion is provided with a second oil return port, the second oil return port is connected to the oil tank through the oil passage, and the electronically controlled distributor is provided with a second distributor oil return port, the second distributor oil return port is connected to the second oil return port.

[0013] Preferably, the electronically controlled distributor is provided with an oil port sealing ring at the connection point with the boss portion.

[0014] According to a second aspect of the present invention, a tractor is provided, wherein the tractor includes an electrically controlled lift for a tractor as described above.

[0015] This utility model relates to an electrically controlled lifting device for a tractor and a tractor. The lifting device body has a pivotable lifting arm, and multiple oil passages are provided inside the lifting device body. A lifting cylinder is located inside the lifting device body and is drive-connected to the lifting arm. An electronically controlled distributor is installed outside the lifting device body. The electronically controlled distributor is connected to the lifting cylinder via oil passages, enabling it to control the oil inlet and outlet of the lifting cylinder, thereby controlling the movement of the lifting arm. This design significantly saves overall machine space, reduces the number of pipelines, and thus lowers costs. It effectively solves the problem of externally designed lifting cylinders and electronically controlled distributors occupying large spaces and requiring extensive piping.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an electrically controlled lifting device for a tractor according to the present invention.

[0019] Figure 2 This is a schematic diagram from another angle of the electrically controlled lifting device for tractors according to this utility model.

[0020] Figure 3 This is a cross-sectional view of the electrically controlled lifting device for tractors according to the present invention.

[0021] Figure 4 This is an installation structure diagram of the electric control distributor for an electric lifter used in a tractor, according to this utility model.

[0022] Reference numerals in the attached drawings: 1-Lifter body; 11-Housing shell; 12-Lifting shaft; 13-Rotating rocker arm; 14-Lifting arm; 15-Snap ring; 2-Lifting cylinder; 21-Cylinder barrel; 22-Cylinder piston; 23-Cylinder piston rod; 3-Electrically controlled distributor; 30-First distributor return port; 31-Distributor inlet; 32-Second distributor return port; 33-Distributor outlet; 4-Boss; 40-Connecting port; 41-First return port; 42-Second return port; 5-Main body inlet; 6-Cylinder inlet; 7-Port sealing ring; 8-Fixing bolt. Detailed Implementation

[0023] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after 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; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0024] 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 feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0025] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0026] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0027] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0028] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that 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 relation terms used herein will be interpreted accordingly.

[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0030] Variations in the shapes shown in the accompanying 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 accompanying drawings, but include changes in shape that may occur during manufacturing.

[0031] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0032] like Figures 1 to 4 As shown, according to a first aspect of the present invention, an electric lifting device for a tractor is provided, which includes a lifting device body 1, a lifting cylinder 2, and an electric control distributor 3.

[0033] In the following description, reference will be made to Figures 1 to 4 This section describes the specific structure of the aforementioned components of the electronically controlled lifter for tractors, as well as the connection relationships between these components.

[0034] like Figures 1 to 4 As shown, in this embodiment, the lifting body 1 can be equipped with a pivotable lifting arm 14 to achieve lifting, neutralizing, lowering, or floating actions. Multiple oil passages can be provided inside the lifting body 1 for hydraulic oil flow, thereby reducing the number of external pipelines. The lifting cylinder 2 can be located inside the lifting body 1 to save overall machine layout space. The lifting cylinder 2 can be drivenly connected to the lifting arm 14. An electronic control distributor 3 is installed outside the lifting body 1. The electronic control distributor 3 can be connected to the lifting cylinder 2 via oil passages, enabling the electronic control distributor 3 to control the oil inlet and outlet of the lifting cylinder 2, thereby controlling the movement of the lifting arm 14. This configuration significantly saves overall machine layout space, reduces the number of pipelines, and thus lowers costs.

[0035] Preferred, such as Figures 1 to 3As shown, in this embodiment, the lifting device body 1 may include a housing 11, a lifting shaft 12, and a rotating rocker arm 13. The housing 11 may have multiple oil passages integrally formed with it, thus replacing external piping to reduce costs and potential oil leaks. The lifting cylinder 2 may be installed inside the housing 11 and connected to the electronic control distributor 3 via the oil passages and piping. The lifting shaft 12 may pass through the housing 11. Specifically, both ends of the lifting shaft 12 may extend out of the housing 11, and the middle portion may be located inside the housing 11. The lifting shaft 12 is mounted to the housing 11 via bearings. Two lifting arms 14 may be splinedly connected to the two ends of the lifting shaft 12, respectively. The rotating rocker arm 13 is pivotally mounted inside the housing 11. The rotating rocker arm 13 can be connected to the spline in the middle of the lifting shaft 12, and the rotating rocker arm 13 can be connected to the lifting cylinder 2 for transmission, so that the lifting cylinder 2 can drive the lifting shaft 12 to rotate through the rotating rocker arm 13, thereby driving the lifting arm 14 to move.

[0036] Specifically, such as Figures 1 to 3 As shown, in this embodiment, splines can be provided at the middle and both ends of the lifting shaft 12, and the lifting arm 14 and the rotating rocker arm 13 can be driven to the lifting shaft 12 via the splines. Furthermore, a retaining spring 15 can be provided at the connection between the lifting arm 14 and the lifting shaft 12, thereby positioning the lifting arm 14. The rotating rocker arm 13 can include a connected annular portion and a rod-shaped portion. The annular portion can be fitted onto the spline at the middle of the lifting shaft 12, thus being driven to the lifting shaft 12. The rod-shaped portion can be driven to the lifting cylinder 2, thereby driving the lifting shaft 12 to rotate. The lifting arm 14 can move under the drive of the lifting shaft 12.

[0037] Furthermore, preferably, such as Figures 1 to 3 As shown, in this embodiment, the lifting cylinder 2 may include a cylinder barrel 21, a cylinder piston 22, and a cylinder piston rod 23. The cylinder barrel 21 may be embedded inside the housing 11. The cylinder barrel 21 may be connected to an oil passage. The cylinder piston 22 is movably disposed inside the cylinder barrel 21, and the cylinder piston 22 can move axially along the cylinder barrel 21 under hydraulic pressure. The first end of the cylinder piston rod 23 may be connected to the cylinder piston 22, and the second end of the cylinder piston rod 23 may be pivotally connected to the rotating rocker arm 13. When the hydraulic cylinder piston 22 is driven to move, the cylinder piston 22 can drive the cylinder piston rod 23 to move, thereby driving the rotating rocker arm 13 to pivot.

[0038] Preferred, such as Figures 1 to 4As shown, in this embodiment, the first side portion (which can be the end portion in the width direction) of the housing 11 may be provided with a main body oil inlet 5 and a boss portion 4. The boss portion 4 may protrude from the surface of the housing 11 to facilitate the installation of the electronically controlled distributor 3. A connecting oil port 40 may be provided on the boss portion 4, which can communicate with an oil passage within the housing 11. The main body oil inlet 5 is provided on the housing 11 for communication with an oil inlet pipeline. The main body oil inlet 5 can be connected to the connecting oil port 40 via an oil passage.

[0039] Preferred, such as Figures 1 to 4 As shown, in this embodiment, the electronically controlled distributor 3 can be mounted to the boss portion 4 of the housing 11 by fixing bolts 8. The electronically controlled distributor 3 may be provided with a distributor inlet 31 on the side near the boss portion 4. The distributor inlet 31 can be connected to the connecting oil port 40, so that hydraulic oil can be delivered to the electronically controlled distributor 3.

[0040] Furthermore, preferably, such as Figures 1 to 4 As shown, in this embodiment, the second side (which can be the end in the length direction) of the housing 11 may be provided with a hydraulic cylinder inlet 6. The electronically controlled distributor 3 may be provided with a distributor outlet 33, which can be connected to the hydraulic cylinder inlet 6 through a pipeline to output hydraulic oil from the electronically controlled distributor 3 to the hydraulic cylinder inlet 6. The hydraulic cylinder inlet 6 can be connected to the large cavity of the hydraulic cylinder barrel 21 through an oil passage to supply oil to the lifting cylinder 2.

[0041] Preferred, such as Figures 1 to 4 As shown, in this embodiment, an oil tank may also be provided inside the housing 11. A first oil return port 41 may also be provided on the boss portion 4. The first oil return port 41 can be connected to the oil tank via an oil passage. The electronically controlled distributor 3 may have a first distributor oil return port 30 on its side near the boss portion 4, and the first distributor oil return port 30 can connect with the first oil return port 41. This arrangement allows the hydraulic oil flowing back from the cylinder barrel 21 to the electronically controlled distributor 3 to circulate through the first distributor oil return port 30 and the first oil return port 41 to the oil tank for storage.

[0042] Further optimized, such as Figures 1 to 4 As shown, in this embodiment, a second oil return port 42 may be provided on the boss portion 4. The second oil return port 42 can be connected to the oil tank inside the housing 11 via an oil passage. The electronically controlled distributor 3 may be provided with a second distributor oil return port 32 on its side near the boss portion 4, and the second distributor oil return port 32 can be connected to the second oil return port 42. This arrangement allows the hydraulic oil flowing from the main body oil inlet 5 to the electronically controlled distributor 3 to flow into the oil tank for storage through the second distributor oil return port 32 and the second oil return port 42.

[0043] Preferred, such as Figure 4 As shown in the embodiment, the electronically controlled distributor 3 may also be provided with an oil port sealing ring 7 at the connection point with the boss portion 4 to prevent hydraulic oil leakage. Specifically, the electronically controlled distributor 3 may be provided with annular grooves at the first distributor return port 30, the distributor inlet port 31, and the second distributor return port 32, and the oil port sealing ring 7 may be installed in the annular groove to achieve a sealing function.

[0044] In addition, such as Figures 1 to 4 As shown, according to a second aspect of the present invention, a tractor is provided, the tractor including the electrically controlled lifting device for a tractor as described above.

[0045] During operation, when the lifting arm 14 performs a lifting action, hydraulic oil enters the lifting body 1 from the main body inlet 5 and flows to the electronically controlled distributor 3 through the connecting inlet 40 and the distributor inlet 31. Subsequently, the oil in the electronically controlled distributor 3 flows out from the distributor outlet 33 and is transported through a pipeline to the cylinder inlet 6, and finally delivered to the large cavity of the cylinder barrel 21. After the hydraulic oil enters the lifting cylinder 2, the cylinder piston 22 will move axially along the cylinder barrel 21 under the action of hydraulic pressure. The cylinder piston 22 can drive the cylinder piston rod 23 to move, thereby driving the rotating rocker arm 13 and the lifting arm 14 to perform the lifting action.

[0046] When the lifting arm 14 is in the neutral position (i.e., stationary), the oil in the cylinder barrel 21 is not flowing. The oil at the main oil inlet 5 flows to the electronically controlled distributor 3 through the connecting oil inlet 40 and the distributor oil inlet 31. Then, the oil in the electronically controlled distributor 3 flows to the oil tank for storage through the second distributor return oil inlet 32 ​​and the second return oil inlet 42.

[0047] When the lifting arm 14 descends or floats, the cylinder piston 22 retracts under load. The oil in the large chamber of the cylinder barrel 21 flows through the cylinder inlet 6 to the distributor outlet 33 and enters the electronically controlled distributor 3. It then flows through the first distributor return port 30 and the first return port 41 to the oil tank for storage. The oil at the main body inlet 5 flows through the connecting port 40 and the distributor inlet 31 to the electronically controlled distributor 3, and then through the second distributor return port 32 and the second return port 42 to the oil tank for storage.

[0048] In this embodiment, the tractor's electronically controlled lifting device can control the flow of hydraulic oil via the electronically controlled distributor 3, thereby controlling the movement of the lifting cylinder 2 to achieve lifting and lowering actions of the lifting arm 14. The lifting cylinder 2 is located inside the lifting device body 1, and the oil passages are also located within the lifting device body 1. This saves space in the overall machine layout and reduces the number of pipes, thus lowering costs and reducing potential oil leaks.

[0049] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. An electrically controlled lifting device for a tractor, characterized in that, The electrically controlled lifting device for the tractor includes: The lifting device body is provided with a pivotable lifting arm, and the interior of the lifting device body has multiple oil passages. A lifting cylinder is disposed inside the main body of the lifting device, and the lifting cylinder is throttle-connected to the lifting arm; and An electronically controlled distributor is installed outside the main body of the lifting device, and the electronically controlled distributor is connected to the lifting cylinder through the oil passage; The lifting device body includes: A housing, wherein the oil passage is formed within the housing, and the lifting cylinder is installed inside the housing; A lifting shaft, passing through the housing, has its end splinedly connected to the lifting arm; and A rotating rocker arm is pivotally mounted inside the housing. The rotating rocker arm is splinedly connected to the middle of the lifting shaft and is drive-connected to the lifting cylinder. The lifting cylinder includes: The cylinder barrel is disposed inside the housing and is connected to the oil passage. A hydraulic cylinder piston, disposed within the cylinder barrel, is capable of axial movement along the cylinder barrel under hydraulic pressure; and A hydraulic cylinder piston rod, the first end of which is connected to the hydraulic cylinder piston, and the second end of which is pivotally connected to the rotating rocker arm; The first side of the housing is provided with a main body oil inlet and a boss. The boss is provided with a connecting oil port. The main body oil inlet is connected to the connecting oil port through the oil passage.

2. The electronically controlled lifting device for tractors according to claim 1, characterized in that, The electronically controlled distributor is installed on the boss portion of the housing, and the electronically controlled distributor is provided with a distributor oil inlet, which is connected to the connecting oil port.

3. The electronically controlled lifting device for tractors according to claim 2, characterized in that, The second side of the housing is provided with a cylinder inlet, which is connected to the cylinder barrel through the oil passage. The electronically controlled distributor is provided with a distributor outlet, which is connected to the cylinder inlet through a pipeline.

4. The electronically controlled lifting device for tractors according to claim 2, characterized in that, An oil tank is provided inside the housing, and a first oil return port is provided on the boss portion. The first oil return port is connected to the oil tank through the oil passage. The electronically controlled distributor is provided with a first distributor oil return port, and the first distributor oil return port is connected to the first oil return port.

5. The electronically controlled lifting device for tractors according to claim 4, characterized in that, The boss portion is provided with a second oil return port, which is connected to the oil tank through the oil passage. The electronically controlled distributor is provided with a second distributor oil return port, which is connected to the second oil return port.

6. The electronically controlled lifting device for tractors according to claim 2, characterized in that, The electronically controlled distributor is provided with an oil port sealing ring at the connection point with the boss portion.

7. A tractor, characterized in that, The tractor includes an electrically controlled lift for a tractor as claimed in any one of claims 1 to 6.

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