Unloading device and combine harvester

Abstract

The utility model relates to the technical field of harvesters, in particular to an unloading device and a combine harvester, the unloading device comprises an unloading component, a hydraulic cylinder, a magnetostrictive displacement sensor and a magnetic component, and the unloading component is rotatably connected with a first target; a cylinder body of the hydraulic cylinder is connected with the second target ground, and a cylinder rod of the hydraulic cylinder is rotationally connected with the unloading component and used for driving the unloading component to rotate relative to the first target ground so as to achieve unfolding or retracting operation; the magnetostriction displacement sensor is arranged in the cylinder body, the magnetic component is arranged on the cylinder rod, and the magnetic component can synchronously move along with the cylinder rod so as to move relative to the magnetostriction displacement sensor. Visibly, the magnetic component can move relative to the magnetostriction displacement sensor along with the cylinder rod, so that the continuous angle value of the unloading component such as a grain unloading barrel during unfolding or retracting can be detected, the real-time position of the unloading component can be reflected more visually, and especially in the grain unloading process, the requirement for a driver is lowered, and the working efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of combine harvesters, and in particular to an unloading device and a combine harvester. Background Art

[0002] With the continuous advancement of agricultural mechanization, harvesting methods are gradually shifting from manual to mechanized, significantly improving agricultural production efficiency. During grain unloading, the unloading drum of a combine harvester is primarily detected at its extreme position during deployment and retraction, failing to directly reflect the drum's other positions. This requires high operator skill. Utility Model Content

[0003] The purpose of this application is to provide an unloading device and a combine harvester, which to a certain extent solves the technical problem in the prior art that when the combine harvester is unloading grain, the unloading drum of the combine harvester is basically detected at the extreme position during the expansion and retraction process, and cannot intuitively reflect other positions of the unloading components, which requires high operating skills of the driver.

[0004] The present application provides an unloading device, comprising: an unloading member, a hydraulic cylinder, a magnetostrictive displacement sensor, and a magnetic member; wherein the unloading member is rotatably connected to a first target location; the cylinder body of the hydraulic cylinder is connected to a second target location; the cylinder rod of the hydraulic cylinder is rotatably connected to the unloading member and is used to drive the unloading member to rotate relative to the first target location to achieve an operation of deployment or retraction;

[0005] The magnetostrictive displacement sensor is arranged inside the cylinder body, and the magnetic component is arranged on the cylinder rod. The magnetic component can move synchronously with the cylinder rod to move relative to the magnetostrictive displacement sensor. The magnetostrictive displacement sensor is used to detect the continuous angle value when the unloading component is deployed or retracted.

[0006] In the above technical solution, further, the cylinder rod is formed with a mounting cavity and an opening connected to the mounting cavity and the interior of the cylinder body, and the magnetostrictive displacement sensor includes a main body and a detection part that are connected. Along the moving direction of the cylinder rod, the main body is arranged on the outside of the cylinder rod, and the detection part extends into the mounting cavity of the cylinder rod through the opening.

[0007] In any of the above technical solutions, further, the magnetic component is annular, and the detection part is arranged in the hollow part of the magnetic component, and the magnetic component can move relative to the detection part.

[0008] In any of the above technical solutions, further, a mounting groove is formed on the side wall of the mounting cavity, and the magnetic component is clamped in the mounting groove.

[0009] In any of the above technical solutions, further, when the stroke of the cylinder rod is zero, a preset gap is formed between the magnetic component and the body of the magnetostrictive displacement sensor along the moving direction of the cylinder rod.

[0010] In any of the above technical solutions, further, along the moving direction of the cylinder rod, the preset gap is 20 mm.

[0011] In any of the above technical solutions, further, the unloading device further includes a support seat, a relief valve and an oil tank; wherein the support seat is arranged on the outer wall of the cylinder body; the relief valve is arranged on the support seat;

[0012] The support seat is formed with a first oil port, a second oil port and a third oil port, and the first oil port is respectively connected to the rodless chamber of the hydraulic cylinder and the overflow valve; the third oil port is respectively connected to the oil outlet of the overflow valve and the external oil tank; the second oil port is connected to the rod chamber of the hydraulic cylinder.

[0013] In any of the above technical solutions, further, the unloading device also includes a one-way valve, which is arranged on the support seat, and the oil inlet of the one-way valve is connected to the oil outlet of the overflow valve, and the oil outlet of the one-way valve is respectively connected to the second oil port and the rod chamber of the hydraulic cylinder.

[0014] In any of the above technical solutions, further, the unloading device also includes a sensor plug, the sensor plug is arranged on the support seat, and the sensor plug is electrically connected to the magnetostrictive displacement sensor.

[0015] The present application also provides a combine harvester comprising a main body, a grain tank, and an unloading device according to any of the above technical solutions; wherein the grain tank is connected to the main body, the unloading member of the unloading device is a grain unloading drum rotatably connected to the grain tank, and the cylinder body of the hydraulic cylinder is rotatably connected to the main body. Therefore, all the beneficial technical effects of the unloading device are achieved and will not be further described here.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] When the unloading device provided by the present application is working, the extension and retraction of the cylinder rod of the hydraulic cylinder can drive the unloading component, such as the grain unloading barrel, to rotate relative to the first target location, such as the grain box, thereby realizing the operation of expanding or retracting the unloading component, such as the grain unloading barrel, so as to meet different usage requirements. In this process, the magnetic component can follow the movement of the cylinder rod relative to the magnetostrictive displacement sensor, so as to detect the continuous angle value of the unloading component, such as the grain unloading barrel, when it is expanded or retracted. That is to say, by utilizing the magnetostrictive principle, a corresponding pulse signal is generated by the intersection of two different magnetic fields to accurately measure the position, and non-contact (wear-free) absolute position measurement can be realized in the hydraulic cylinder. It is not limited to the extreme position detection, and can more intuitively reflect the real-time position of the unloading component, such as the grain unloading barrel. During the unloading process, the requirements for the driver are reduced, and the built-in magnetostrictive displacement sensor can be applied to extremely harsh working conditions, and the electrical signal is a linear signal, which can complete the full-stroke angle detection of the entire unloading component, such as the grain unloading barrel, and output a continuous electrical signal. In addition, this device also helps to improve the harvesting efficiency, and the structure of the unloading device is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram of the structure of the unloading device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a hydraulic cylinder provided in an embodiment of the present application;

[0021] Figure 3 Another structural schematic diagram of the hydraulic cylinder provided in an embodiment of the present application;

[0022] Figure 4 A cross-sectional view of a hydraulic cylinder provided in an embodiment of the present application;

[0023] Figure 5 This is an oil circuit diagram of the unloading device provided in an embodiment of the present application.

[0024] Reference numerals:

[0025] 1-unloading component, 2-hydraulic cylinder, 21-cylinder body, 211-rodless chamber, 212-rod chamber, 22-cylinder rod, 221-mounting chamber, 3-magnetostrictive displacement sensor, 31-main body, 32-detection part, 4-magnetic component, 5-support seat, 51-first oil port, 52-second oil port, 53-third oil port, 6-overflow valve, 7-oil tank, 8-check valve, 9-sensor plug, 10-mounting seat, 11-connecting ear. DETAILED DESCRIPTION

[0026] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0027] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0028] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "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 or electrical connections; direct connections or 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 application based on the specific circumstances.

[0031] Refer to the following Figures 1 to 5 An unloading device and a combine harvester according to some embodiments of the present application are described.

[0032] Example 1

[0033] See also Figures 1 to 5 As shown, an embodiment of the present application provides an unloading device, comprising: an unloading member 1, a hydraulic cylinder 2, a magnetostrictive displacement sensor 3, and a magnetic member 4; wherein the unloading member 1 is rotatably connected to a first target location; a cylinder body 21 of the hydraulic cylinder 2 is connected to a second target location; a cylinder rod 22 of the hydraulic cylinder 2 is rotatably connected to the unloading member 1 and is used to drive the unloading member 1 to rotate relative to the first target location to achieve an operation of deployment or retraction;

[0034] The magnetostrictive displacement sensor 3 is arranged inside the cylinder body 21, and the magnetic component 4 is arranged on the cylinder rod 22. The magnetic component 4 can move synchronously with the cylinder rod 22 to move relative to the magnetostrictive displacement sensor 3. The magnetostrictive displacement sensor 3 is used to detect the continuous angle value when the unloading component 1 is deployed or retracted.

[0035] Furthermore, preferably, the present unloading device can be applied to a combine harvester, and the combine harvester includes a main body and a grain tank; wherein the grain tank is connected to the main body, and the grain tank is the aforementioned first destination, then correspondingly, the unloading component 1 of the unloading device is a grain unloading barrel on the combine harvester, and this grain unloading barrel is rotatably connected to the grain tank; the main body is the aforementioned second destination, then correspondingly, the cylinder body 21 of the hydraulic cylinder 2 is rotatably connected to the main body. The following text will also illustrate the application of the present unloading device to a combine harvester. Of course, it is not limited to this. The present unloading device can also be applied to other equipment, not just combine harvesters, and correspondingly, the unloading component 1 is not limited to the grain unloading barrel, but can also be other structures, specifically designed according to actual needs.

[0036] According to the structure described above, when the unloading device provided by the present application is working, the extension and retraction of the cylinder rod 22 of the hydraulic cylinder 2 can drive the unloading component 1, that is, the grain unloading barrel to rotate relative to the first target place, that is, the grain box, and then realize the operation of expanding or retracting the grain unloading barrel, thereby meeting different usage requirements. In this process, the magnetic component 4 can follow the movement of the cylinder rod 22 relative to the magnetostrictive displacement sensor 3, so as to detect the continuous angle value of the unloading component 1, that is, the grain unloading barrel when it is expanded or retracted. That is to say, by utilizing the magnetostrictive principle, a corresponding pulse signal is generated by the intersection of two different magnetic fields to accurately Accurately measure the position, and realize non-contact (wear-free) absolute position measurement in the hydraulic cylinder 2, and is not limited to the extreme position detection, and can more intuitively reflect the real-time position of the unloading component 1, that is, the grain unloading barrel. In the process of unloading grain, the requirements for the driver are reduced, and the built-in magnetostrictive displacement sensor 3 can be applied to extremely harsh working conditions, and the electrical signal is a linear signal, which can complete the full-stroke angle detection of the entire unloading component 1, that is, the grain unloading barrel when it is expanded or retracted, and output a continuous electrical signal. In addition, this device also helps to improve the harvesting efficiency, and the unloading device has a simple structure and is easy to use.

[0037] It should be noted that: Figure 1 1 shows the unloading member 1, that is, the grain unloading drum when it is unfolded and retracted.

[0038] In this embodiment, preferably, Figure 4 As shown, the cylinder rod 22 is formed with a mounting cavity 221 and an opening communicating with the mounting cavity 221 and the interior of the cylinder body 21. The magnetostrictive displacement sensor 3 includes a main body 31 and a detection portion 32 connected thereto. Along the moving direction of the cylinder rod 22, the main body 31 is arranged on the outside of the cylinder rod 22, and the detection portion 32 extends into the mounting cavity 221 of the cylinder rod 22 through the opening.

[0039] Further, preferably, Figure 4 As shown, the magnetic component 4 is annular, and the detection portion 32 is disposed in the hollow of the magnetic component 4 , and the magnetic component 4 can move relative to the detection portion 32 .

[0040] According to the structure described above, when the cylinder rod 22 moves, it will drive the magnetic component 4 to move along the detection part 32, so as to detect the relative displacement of the two in real time, and then be able to detect the position of the unloading component 1 in real time, and the magnetic component 4 is arranged to be annular, and the detection part 32 can be passed through the hollow part of the magnetic component 4 without causing interference, and the detection can be completed smoothly. In addition, the detection part 32 is inserted into the mounting cavity 221 of the cylinder rod 22, which reduces the overall length of the hydraulic cylinder 2, makes the structure of the hydraulic cylinder 2 more stable, and can also reduce production costs. Moreover, installing the detection part 32 in the mounting cavity 221 can also play the role of a movement guide.

[0041] In this embodiment, preferably, Figure 3 As shown, a mounting groove is formed on the side wall of the mounting cavity 221, and the magnetic component 4 is clamped in the mounting groove.

[0042] According to the structure described above, the magnetic component 4 is embedded in the cylinder rod 22 to avoid interference with other components, and it can also protect the magnetic component 4. Moreover, the magnetic component 4 is clamped in the installation groove, which is more firm and stable.

[0043] It should be noted that the magnetic component 4 is not limited to being installed in the aforementioned installation groove. The magnetic component 4 can also be installed outside the end of the cylinder rod 22 close to the body 31 of the magnetostrictive displacement sensor 3 along the moving direction of the cylinder rod 22, and the specific selection is based on actual needs.

[0044] Moreover, the magnetic component 4 can also be connected to the cylinder rod 22 by gluing or bolts (non-metallic parts), or the magnetic component 4 is formed with a plug-in protrusion, the cylinder rod 22 is formed with a plug-in groove, and the plug-in protrusion and the plug-in groove are interference fit, which can also play the role of connecting the magnetic component 4 and the cylinder rod 22 together. It should also be noted that: these connection methods can also be combined with the structure of the magnetic component 4 being clamped in the installation groove to play a variety of reinforcement roles.

[0045] In this embodiment, preferably, Figure 4 As shown, when the stroke of the cylinder rod 22 is zero, a preset gap a is formed between the magnetic component 4 and the body 31 of the magnetostrictive displacement sensor 3 along the moving direction of the cylinder rod 22 .

[0046] As can be seen from the structure described above, this preset gap a can be filled with oil, providing a buffer during the initial activation of the cylinder rod 22, preventing vibration caused by extension or retraction of the cylinder, reducing the impact of signal output fluctuations, and improving the detection accuracy of the magnetostrictive displacement sensor 3. Of course, this preset distance can also be omitted, depending on actual needs.

[0047] Further, preferably, Figure 3 As shown, a preset gap a=20 mm is set along the moving direction of the cylinder rod 22. While meeting the buffering requirements, this distance is minimized as much as possible, which helps to reduce the overall length of the hydraulic cylinder 2. Of course, the preset gap a along the moving direction of the cylinder rod 22 is not limited to 20 mm and can be designed according to actual needs, for example, greater than 20 mm or less than 20 mm.

[0048] In this embodiment, preferably, Figure 2 、 Figure 3 and Figure 5 As shown, the unloading device also includes a support seat 5, a relief valve 6 and an oil tank 7; wherein, the support seat 5 is arranged on the outer wall of the cylinder body 21; the relief valve 6 is arranged on the support seat 5; the support seat 5 is formed with a first oil port 51, a second oil port 52 and a third oil port 53, and the first oil port 51 is respectively connected to the rodless chamber 211 of the hydraulic cylinder 2 and the relief valve 6; the third oil port 53 is respectively connected to the oil outlet of the relief valve 6 and the external oil tank 7; the second oil port 52 is connected to the rod chamber 212 of the hydraulic cylinder 2.

[0049] According to the structure described above, it can be seen that the first oil port 51 is the oil port of the rodless chamber 211 of the hydraulic cylinder 2, the second oil port 52 is the oil port of the rod chamber 212 of the hydraulic cylinder 2, and the third oil port 53 is the oil return port of the overflow valve 6. The oil enters from the first oil port 51 and is divided into two oil circuits, one oil circuit enters the rod chamber 212, and the other oil circuit enters the oil inlet of the overflow valve 6. The oil outlet of the overflow valve 6 is connected to the two oil circuit branches, one is connected to the third oil port 53 and directly returns to the oil tank 7, and the other oil port is connected to the oil inlet of the one-way valve, and the oil outlet of the one-way valve is connected to the oil port of the rod chamber 212 of the hydraulic cylinder 2, that is, the second oil port 52.

[0050] It can be seen that the hydraulic cylinder 2, that is, the unloading oil cylinder, has a built-in overflow valve 6. According to the set pressure, when the unloading component 1 is unfolded, if it hits hard objects such as trees, walls, houses, etc., the oil pressure in the unloading oil cylinder will rise, and the overflow valve 6 will overflow according to the set pressure, and the oil cylinder will stop working to prevent the unloading component 1 from further working and colliding with objects and being damaged, thereby improving the safety and reliability of the unloading component 1 during use.

[0051] In this embodiment, preferably, Figure 2 、 Figure 3 and Figure 5 As shown, the unloading device also includes a one-way valve 8, which is arranged on the support seat 5, and the oil inlet of the one-way valve 8 is connected to the oil outlet of the overflow valve 6, and the oil outlet of the one-way valve 8 is respectively connected to the second oil port 52 and the rod chamber 212 of the hydraulic cylinder 2.

[0052] According to the structure described above, the one-way valve is used to ensure the stability of the hydraulic oil when the overflow valve 6 overflows. Of course, the one-way valve 8 may not be provided, and the selection is based on actual needs.

[0053] In this embodiment, preferably, Figure 2 and Figure 3 As shown, the unloading device further includes a sensor plug 9 , which is disposed on the support base 5 , and the sensor plug 9 is electrically connected to the magnetostrictive displacement sensor 3 .

[0054] According to the structure described above, the sensor plug 9 is responsible for signal transmission, and preferably, the sensor plug 9 is communicatively connected to the main controller on the combine harvester, and can transmit signals to the main controller on the combine harvester. The main controller can display the detection results to the driver, etc. through the display screen. This part of the signal transmission and processing structure is an existing structure and will not be described in detail here.

[0055] Example 2

[0056] See also Figure 1As shown, the second embodiment of the present application also provides a combine harvester, including the unloading device described in the above-mentioned first embodiment, and thus, has all the beneficial technical effects of the unloading device, and the same technical features and beneficial effects are no longer repeated.

[0057] In this embodiment, preferably, Figures 1 to 4 As shown, the combine harvester also includes a main body and a grain tank; wherein, the grain tank is connected to the main body, and the unloading component 1 of the unloading device is a grain unloading barrel on the combine harvester, and this grain unloading barrel is rotatably connected to the grain tank; the cylinder body 21 of the hydraulic cylinder 2 is rotatably connected to the main body.

[0058] According to the structure described above, the combine harvester provided in the present application is equipped with a new type of unloading device, which includes an unloading component 1, a hydraulic cylinder 2, a magnetostrictive displacement sensor 3 and a magnetic component 4. The extension and contraction of the cylinder rod 22 of the hydraulic cylinder 2 can drive the unloading component 1, that is, the grain unloading barrel, to rotate relative to the grain box, thereby realizing the expansion or retraction operation, thereby meeting different usage requirements. In this process, the magnetic component 4 can follow the cylinder rod 22 to move relative to the magnetostrictive displacement sensor 3, thereby being able to detect the continuous angle value of the unloading component 1 when it is expanded or retracted, and is not limited to the extreme position detection. It can more intuitively reflect the real-time position of the unloading component 1, reduce the requirements for the driver in the process of unloading grain, and help improve work efficiency. In addition, the structure of the unloading device is simple and easy to use.

[0059] In this embodiment, preferably, Figure 1 As shown, a mounting seat 10 is provided on the side of the grain unloading drum, a connecting ear 11 is provided on the mounting seat 10, and the cylinder rod 22 of the hydraulic cylinder 2 is rotatably connected to the connecting ear 11 through a pin shaft, and the cylinder body 21 of the hydraulic cylinder 2 and the main body can also be rotatably connected through a pin shaft.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An unloading device, characterized in that: include: An unloading member, a hydraulic cylinder, a magnetostrictive displacement sensor, and a magnetic member; wherein the unloading member is rotatably connected to a first target location; the cylinder body of the hydraulic cylinder is connected to a second target location; the cylinder rod of the hydraulic cylinder is rotatably connected to the unloading member and is used to drive the unloading member to rotate relative to the first target location to achieve an expansion or retraction operation; The magnetostrictive displacement sensor is arranged inside the cylinder body, and the magnetic component is arranged on the cylinder rod. The magnetic component can move synchronously with the cylinder rod to move relative to the magnetostrictive displacement sensor. The magnetostrictive displacement sensor is used to detect the continuous angle value when the unloading component is deployed or retracted.

2. The unloading device according to claim 1, characterized in that The cylinder rod is formed with a mounting cavity and an opening communicating with the mounting cavity and the interior of the cylinder body. The magnetostrictive displacement sensor includes a main body and a detection part connected thereto. Along the moving direction of the cylinder rod, the main body is arranged on the outside of the cylinder rod, and the detection part extends into the mounting cavity of the cylinder rod through the opening.

3. The unloading device according to claim 2, characterized in that: The magnetic component is annular, the detection portion is disposed in a hollow portion of the magnetic component, and the magnetic component is movable relative to the detection portion.

4. The unloading device according to claim 3, characterized in that: A mounting groove is formed on the side wall of the mounting cavity, and the magnetic component is clamped in the mounting groove.

5. The unloading device according to claim 2, characterized in that: When the stroke of the cylinder rod is zero, a preset gap is formed between the magnetic component and the body of the magnetostrictive displacement sensor along the moving direction of the cylinder rod.

6. The unloading device according to claim 5, characterized in that: Along the moving direction of the cylinder rod, the preset gap is 20 mm.

7. The unloading device according to any one of claims 1 to 6, characterized in that The unloading device further includes a support seat, a relief valve and an oil tank; wherein the support seat is arranged on the outer wall of the cylinder body; the relief valve is arranged on the support seat; The support seat is formed with a first oil port, a second oil port and a third oil port, and the first oil port is respectively connected to the rodless chamber of the hydraulic cylinder and the overflow valve; the third oil port is respectively connected to the oil outlet of the overflow valve and the external oil tank; the second oil port is connected to the rod chamber of the hydraulic cylinder.

8. The unloading device according to claim 7, characterized in that: The unloading device also includes a one-way valve, which is arranged on the support seat, and the oil inlet of the one-way valve is connected to the oil outlet of the overflow valve, and the oil outlet of the one-way valve is respectively connected to the second oil port and the rod chamber of the hydraulic cylinder.

9. The unloading device according to claim 7, characterized in that: The unloading device further includes a sensor plug, which is disposed on the support seat and is electrically connected to the magnetostrictive displacement sensor.

10. A combine harvester, characterized in that: It comprises a main body, a grain tank and an unloading device as described in any one of claims 1 to 9; wherein the grain tank is connected to the main body, and the unloading component of the unloading device is a grain unloading barrel, and is rotatably connected to the grain tank; the cylinder body of the hydraulic cylinder is rotatably connected to the main body.

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