CN211378824U - Combine unloads grain section of thick bamboo return control system and combine - Google Patents
Combine unloads grain section of thick bamboo return control system and combine Download PDFInfo
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- CN211378824U CN211378824U CN201921338852.6U CN201921338852U CN211378824U CN 211378824 U CN211378824 U CN 211378824U CN 201921338852 U CN201921338852 U CN 201921338852U CN 211378824 U CN211378824 U CN 211378824U
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Abstract
The utility model provides a combine and a return control system of a grain unloading cylinder of the combine, wherein the control system comprises a CPU processing unit, an input signal component and an output signal component; the input signal composition is in communication connection with the CPU processing unit through the input signal isolation circuit, and the output signal composition is in communication connection with the CPU processing unit through the output signal isolation circuit; the input signal forms a limit signal for inputting the grain unloading cylinder to the CPU processing unit; the CPU processing unit controls the operation of the grain unloading cylinder according to the limit signal and through the output signal; the output signal is used for executing the output signal of the CPU processing unit so as to control the operation of the grain unloading cylinder; by adopting the technical scheme, in the grain unloading process of the combine harvester, an operator can adjust the position of the grain unloading barrel through manual operation or automatic operation, so that the reset is realized; the utility model provides a scheme can effectively shorten the operating time of unloading grain, reduces the driver and operates the degree of difficulty, improves the operating efficiency, promotes product competitiveness.
Description
Technical Field
The utility model belongs to the technical field of combine, concretely relates to combine unloads grain section of thick bamboo return control system and combine.
Background
A combine harvester is one of the most common and commonly used agricultural machines, and is mainly used for harvesting crops such as rice and wheat. The grain unloading mode of the existing grain combine harvester in China is divided into three modes of manual grain unloading, low-position mechanical grain unloading and high-position mechanical grain unloading; wherein, the manual grain unloading and the low-position mechanical grain unloading have the disadvantages of troublesome operation of operators, high labor intensity and low operation efficiency in the grain unloading process; grain is unloaded to high machine mechanical type, unloads grain in-process operating personnel and can unload a grain section of thick bamboo position through operating handle manual adjustment, has alleviateed operating personnel's intensity of labour, still exists and unloads a grain section of thick bamboo manual positioning and the return degree of difficulty is big to in the adjustment process, often can not once target in place, the long scheduling problem of adjustment time, the operating efficiency fails obvious improvement.
Based on the technical problems existing in the combine harvester, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the weak point that exists among the above-mentioned technique, provide a combine and unload grain section of thick bamboo return control system and combine, aim at solving current combine troublesome poeration, the big, the low problem of operating efficiency of intensity of labour.
The utility model provides a return control system for a grain unloading cylinder of a combine harvester, which comprises a CPU processing unit, an input signal component and an output signal component; the input signal composition is in communication connection with the CPU processing unit through the input signal isolation circuit, and the output signal composition is in communication connection with the CPU processing unit through the output signal isolation circuit; the input signal forms a limit signal for inputting the grain unloading cylinder to the CPU processing unit; the CPU processing unit controls the operation of the grain unloading cylinder according to the limit signal and through the output signal; the output signal is used for executing the output signal of the CPU processing unit so as to control the operation of the grain unloading cylinder.
Further, the input signal component comprises a left limit switch and a right limit switch; the output signal component comprises a hydraulic motor left-turn electromagnetic valve and a hydraulic motor right-turn electromagnetic valve; the left limit switch is used for inputting a left limit signal to the CPU processing unit; the right limit switch is used for inputting a right limit signal to the CPU processing unit; the CPU processing unit limits the grain unloading cylinder to run in a left-turning mode through a hydraulic motor left-turning electromagnetic valve according to the left limiting signal; and the CPU processing unit limits the grain unloading cylinder to rotate right through the hydraulic motor right-rotating electromagnetic valve according to the right limiting signal.
Furthermore, the input signal assembly also comprises a grain unloading cylinder height limiting sensor and a grain unloading cylinder bracket sensor; the output signal assembly also comprises a grain unloading cylinder ascending electromagnetic valve and a grain unloading cylinder descending electromagnetic valve; the grain unloading cylinder high limit sensor is used for inputting a rising limit signal to the CPU processing unit; the grain unloading cylinder bracket sensor is used for inputting a descending limit signal to the CPU processing unit; the CPU processing unit limits the grain unloading cylinder to ascend through the grain unloading cylinder ascending electromagnetic valve according to the ascending limit signal; and the CPU processing unit limits the grain unloading cylinder to descend according to the descending limit signal and through the grain unloading cylinder descending electromagnetic valve.
Furthermore, the input signal assembly also comprises a grain unloading cylinder zero sensor, and the grain unloading cylinder zero sensor is used for positioning the position of the grain unloading cylinder bracket and judging the position of the grain unloading cylinder; the CPU processing unit memorizes the rotation direction of the grain unloading barrel according to the zero sensor of the grain unloading barrel.
Further, the device also comprises a power system, wherein the power system is electrically connected with the return control system; the power system is used for driving the grain unloading barrel to ascend, descend, rotate left and rotate right.
Furthermore, the input signal assembly also comprises a grain unloading barrel control panel, and the grain unloading barrel control panel is provided with an ascending button, a descending button, a left-handed button, a right-handed button and an automatic return button; the lifting button is used for manually controlling the grain unloading barrel to lift and run; the descending button is used for manually controlling the grain unloading barrel to descend; the left-handed button is used for manually controlling the left-handed operation of the grain unloading barrel; the right-handed button is used for manually controlling the grain unloading barrel to operate rightwards.
Correspondingly, the utility model also provides an automatic return control method of the grain unloading cylinder of the combine harvester, which is applied to the return control system; the method also comprises the following steps: and starting a power system to drive the grain unloading barrel to operate, and when an input signal forms a limit signal for inputting the grain unloading barrel to the CPU processing unit, the CPU processing unit controls the grain unloading barrel to operate according to the limit signal and through an output signal.
Further, the method specifically comprises the following processes before the power system is started to drive the grain unloading barrel to run:
firstly, detecting whether the power supply voltage is lower than a preset voltage, and when the power supply voltage is lower than the preset voltage, not executing any action; when the power supply voltage is not lower than the preset voltage, detecting the operation of the control panel and judging whether to execute an automatic return mode; if the CPU processing unit receives the automatic return mode signal, the system enters an automatic mode, and the method specifically comprises the following steps:
s1: whether the automatic return operation is detected or not, if the automatic return operation signal is not detected, no action is executed; if the self-return operation signal is detected, performing the following S2 operation;
s2: if the ascending limit signal is not detected, continuing to control the grain unloading barrel to ascend, and simultaneously continuing to detect the ascending limit signal by the system; if the rising limit signal is detected, the following operation S3 is performed;
s3: if the zero position signal is not detected, the position of the grain unloading barrel is further judged, and a reverse rotation signal is output according to the memorized in-situ signal operation, so that the grain unloading barrel is controlled to rotate, and meanwhile, the system continues to detect the zero position signal; if the zero signal is detected, performing the following S4 operation;
s4: and if the falling sensor signal is not detected, continuing to execute control to descend the grain unloading barrel until the falling sensor signal is detected, automatically dropping the grain unloading barrel to the position of the support, and finishing the automatic returning action.
Further, when the power supply voltage is not lower than the preset voltage, the operation of the control panel is detected, and whether the manual execution mode is executed or not is judged; if the CPU processing unit receives the manual execution mode signal, the system enters the manual mode, which specifically includes:
s10: whether a left limit signal of the action direction is detected or not, and when the left limit signal is detected, the left-turning operation action of the grain unloading barrel is not executed; when the left limit signal is not detected, the left-turning operation of the grain unloading barrel is executed according to the operation of the control panel;
s20: whether a right limit signal of the action direction is detected or not, and when the right limit signal is detected, the right-turning operation action of the grain unloading barrel is not executed; when the right limit signal is not detected, executing the right rotation operation action of the grain unloading barrel according to the operation of the control panel;
s30: whether a rising limit signal of the action direction is detected or not, and when the rising limit signal is detected, the rising operation action of the grain unloading barrel is not executed; when the ascending limit signal is not detected, the ascending operation action of the grain unloading barrel is executed according to the operation of the control panel;
s40: whether a descending limit signal of the action direction is detected or not, and when the descending limit signal is detected, the descending operation action of the grain unloading cylinder is not executed; and when the descending limit signal is not detected, the descending operation action of the grain unloading barrel is executed according to the operation of the control panel.
Correspondingly, the utility model also provides a combine, including return control system, its characterized in that, return control system is above-mentioned combine unload a grain section of thick bamboo return control system.
By adopting the technical scheme, in the grain unloading process of the combine harvester, an operator can adjust the position of the grain unloading barrel through manual operation or automatic operation, so that the reset is realized; the utility model provides a scheme can effectively shorten the operating time of unloading grain, reduces the driver and operates the degree of difficulty, improves the operating efficiency, promotes product competitiveness.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a return control system of a grain unloading cylinder of the combine harvester;
FIG. 2 is a schematic view of a control panel of a return control system of a grain unloading cylinder of the combine harvester of the present invention;
fig. 3 is a flow chart of the automatic return control method for the grain unloading cylinder of the combine harvester.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1 to 3, the utility model provides a return control system for a grain discharging cylinder of a combine harvester, which comprises a CPU processing unit, an input signal component and an output signal component; the input signal composition is in communication connection with the CPU processing unit through the input signal isolation circuit, and the output signal composition is in communication connection with the CPU processing unit through the output signal isolation circuit; the input signal forms a limit signal for inputting the grain unloading cylinder to the CPU processing unit; the CPU processing unit controls the operation of the grain unloading cylinder according to the limit signal and through the output signal; the output signal is used for executing the output signal of the CPU processing unit so as to control the operation of the grain unloading cylinder; by adopting the scheme, the control system of the combine harvester can control and execute the quick and stable return of the grain unloading cylinder according to the input signal composition and the output signal composition which are arranged on the control system; the return control system effectively solves the problem that the harvester is difficult to return to the original position manually when a grain unloading cylinder is recovered in the grain unloading process, thereby reducing the operation difficulty of personnel, shortening the grain unloading operation time, reducing the labor intensity of the operating personnel and improving the operation efficiency and the product competitiveness.
Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in the present embodiment, the input signal component includes a left limit switch and a right limit switch; the output signal component comprises a hydraulic motor left-turn electromagnetic valve and a hydraulic motor right-turn electromagnetic valve; furthermore, the left limit switch is used for inputting a left limit signal to the CPU processing unit; the right limit switch is used for inputting a right limit signal to the CPU processing unit; the CPU processing unit limits the grain unloading cylinder to run in a left-turning mode through a hydraulic motor left-turning electromagnetic valve according to the left limiting signal; the CPU processing unit limits the grain unloading cylinder to rotate rightwards through a hydraulic motor right-turning electromagnetic valve according to the right limiting signal; specifically, the left limit switch signal and the right limit switch signal are positioning signals of the grain unloading barrel, so that the phenomenon that the oil pipe and the line are twisted off due to transitional rotation of the grain unloading barrel can be prevented, the left limit switch signal and the right limit switch signal are only transmitted to the controller of the CPU, and the controller controls the left-turn electromagnetic valve and the right-turn electromagnetic valve.
Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in this embodiment, the input signal component further includes a grain unloading cylinder high limit sensor and a grain unloading cylinder support sensor; the output signal assembly also comprises a grain unloading cylinder ascending electromagnetic valve and a grain unloading cylinder descending electromagnetic valve; further, the grain unloading cylinder high limit sensor is used for inputting a rising limit signal to the CPU processing unit; the grain unloading cylinder bracket sensor is used for inputting a descending limit signal to the CPU processing unit, namely the grain unloading cylinder bracket sensor is a descending sensor and is used for providing a descending sensor signal; the CPU processing unit limits the grain unloading cylinder to ascend through the grain unloading cylinder ascending electromagnetic valve according to the ascending limit signal; the CPU processing unit limits the grain unloading cylinder to descend through the grain unloading cylinder descending electromagnetic valve according to the descending limit signal; specifically, the high limit sensor and the bracket sensor are used for positioning the height of the grain unloading barrel, have the same functions with the left limit switch signal and the right limit switch signal, do not specifically control related components, mainly provide a controller for collecting the position information of the grain unloading barrel, and output signals of the controller are used for controlling each path of electromagnetic valve.
Preferably, with reference to the above schemes, as shown in fig. 1 to 3, in this embodiment, the input signal component further includes a zero sensor of the grain unloading cylinder, and the zero sensor of the grain unloading cylinder is used for positioning the position of the bracket of the grain unloading cylinder and judging the position of the grain unloading cylinder; the CPU processing unit memorizes the rotation direction of the grain unloading barrel according to the zero sensor of the grain unloading barrel; specifically, the main functions of the null sensor specifically include: firstly, the position of the grain unloading barrel bracket is positioned, so that the grain unloading barrel can accurately fall into the grain unloading barrel bracket; secondly, the position of the grain unloading barrel is judged, when the grain unloading barrel passes through a zero position signal in the manual mode rotation process, the controller can automatically memorize the current rotation direction, so that in the automatic mode, the grain unloading barrel can automatically rotate in the reverse direction and rotate back to the bracket; when the grain unloading cylinder is lifted firstly in the automatic return process until a lifting limit signal is received, and then the grain unloading cylinder rotates, as mentioned above, the zero position sensor does not control the operation of a certain component and only has a positioning function; the zero position signal is the same as other signals of the left limit switch, the right limit switch and the like, and is a common switching value signal.
Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in this embodiment, the utility model provides a combine harvester grain unloading drum return control system further includes a power system, the power system is electrically connected with the return control system, and is used for providing power to the control system; specifically, the power system is used for driving the grain unloading cylinder to ascend, descend, turn left and turn right, and the power system can adopt the power system of the existing combine harvester as direct power output.
Preferably, with the above scheme, as shown in fig. 1 to 3, in this embodiment, the input signal component further includes a grain unloading barrel control panel, and the grain unloading barrel control panel is provided with a rise button, a fall button, a left-handed button, a right-handed button, and an automatic return button; the lifting button is used for manually controlling the grain unloading barrel to lift and run; the descending button is used for manually controlling the grain unloading barrel to descend; the left-handed button is used for manually controlling the left-handed operation of the grain unloading barrel; the right-handed button is used for manually controlling the grain unloading barrel to operate rightwards; specifically, in the automatic mode process, if an emergency occurs, any button in a direction other than the current action direction can be pressed to stop the action, namely, in the automatic ascending process of the grain unloading barrel, the descending button, the left-handed button and the right-handed button can be pressed to stop the action immediately.
Correspondingly, in combination with the above scheme, as shown in fig. 1 to 3, the utility model also provides an automatic return control method for the grain unloading cylinder of the combine harvester, which is applied to the return control system; the method also comprises the following steps: the power system is started to drive the grain unloading barrel to operate, when the input signal forms a limit signal used for inputting the grain unloading barrel to the CPU processing unit, the CPU processing unit controls the grain unloading barrel to operate according to the limit signal and the output signal, so that the grain unloading barrel can be efficiently and stably controlled to return, and the working effect is improved.
Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in this embodiment, before the power system is started to drive the grain unloading barrel to operate, the following process is specifically included:
firstly, detecting whether the power supply voltage is lower than a preset voltage; specifically, the preset voltage value can be adjusted according to actual requirements, in this embodiment, the valve block may not be opened when the working voltage of the electromagnetic valve is lower than 11V, which causes a system fault, and thus the preset voltage value can be set to 11V; when the power supply voltage is lower than the preset voltage, no action is executed; when the power supply voltage is not lower than the preset voltage, detecting the operation of the control panel and judging whether to execute an automatic return mode; if the CPU processing unit receives the automatic return mode signal, the system enters an automatic mode, and the method specifically comprises the following steps:
s1: whether the automatic return operation is detected or not, if the automatic return operation signal is not detected, no action is executed; if the self-return operation signal is detected, performing the following S2 operation;
s2: if the ascending limit signal is not detected, continuing to control the grain unloading barrel to ascend, and simultaneously continuing to detect the ascending limit signal by the system; if the rising limit signal is detected, the following operation S3 is performed; specifically, during the operation of the grain unloading barrel, the grain unloading barrel needs to be lifted firstly, which mainly has the main function of preventing the grain unloading barrel from colliding with related parts on the top of a vehicle body when rotating at a low height;
s3: whether a zero position signal is detected or not, wherein the zero position signal is provided by a zero sensor of the grain unloading barrel; if no zero position signal is detected, further judging the position of the grain unloading barrel, and outputting a reverse rotation signal according to the memorized normal position signal operation, so as to control the grain unloading barrel to rotate, and simultaneously, continuously detecting the zero position signal by the system; if the zero signal is detected, performing the following S4 operation;
s4: if the falling sensor signal is detected, if the falling sensor signal is not detected, continuing to control the grain unloading barrel to descend until the falling sensor signal is detected, automatically dropping the grain unloading barrel to the position of the bracket, and finishing the automatic returning action;
by adopting the scheme, in the automatic mode process, if an emergency occurs, any button in the direction which is not the current action direction can be pressed to stop the action, namely, in the automatic ascending process of the grain unloading barrel, the descending button, the left-handed button and the right-handed button can be pressed to stop the action immediately.
Preferably, with reference to the above solutions, as shown in fig. 1 to 3, in this embodiment, when the power voltage is not lower than the preset voltage, the method further includes detecting an operation of the control panel, and determining whether to execute the manual execution mode; if the CPU processing unit receives the manual execution mode signal, the system enters the manual mode, which specifically includes:
s10: whether a left limit signal of the action direction is detected or not, and when the left limit signal is detected, the left-turning operation action of the grain unloading barrel is not executed; when the left limit signal is not detected, the left-turning operation of the grain unloading barrel is executed according to the operation of the control panel;
s20: whether a right limit signal of the action direction is detected or not, and when the right limit signal is detected, the right-turning operation action of the grain unloading barrel is not executed; when the right limit signal is not detected, executing the right rotation operation action of the grain unloading barrel according to the operation of the control panel;
s30: whether a rising limit signal of the action direction is detected or not, and when the rising limit signal is detected, the rising operation action of the grain unloading barrel is not executed; when the ascending limit signal is not detected, the ascending operation action of the grain unloading barrel is executed according to the operation of the control panel;
s40: whether a descending limit signal of the action direction is detected or not, and when the descending limit signal is detected, the descending operation action of the grain unloading cylinder is not executed; when the descending limit signal is not detected, the descending operation action of the grain unloading barrel is executed according to the operation of the control panel;
the specific operations of the above-mentioned S10 to S40 can be controlled by the operator himself or herself according to actual operating conditions, and there is no inevitable order therebetween.
Correspondingly, combine above-mentioned scheme, the utility model also provides a combine, including return control system, its characterized in that, return control system is above-mentioned combine unload a grain section of thick bamboo return control system.
By adopting the technical scheme, in the grain unloading process of the combine harvester, an operator can adjust the position of the grain unloading barrel through manual operation or automatic operation, so that the reset is realized; the utility model provides a scheme can effectively shorten the operating time of unloading grain, reduces the driver and operates the degree of difficulty, improves the operating efficiency, promotes product competitiveness.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. The technical solutions of the present invention can be used by anyone skilled in the art to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the present invention are all within the protection scope of the present invention.
Claims (5)
1. A return control system for a grain unloading cylinder of a combine harvester is characterized by comprising a CPU (central processing unit), an input signal component and an output signal component; the input signal composition is in communication connection with the CPU processing unit through an input signal isolation circuit, and the output signal composition is in communication connection with the CPU processing unit through an output signal isolation circuit;
the input signal forms a limit signal for inputting the grain unloading barrel to the CPU processing unit;
the CPU processing unit controls the operation of the grain unloading barrel according to the limiting signal and through the output signal;
the output signal composition is used for executing the output signal of the CPU processing unit so as to control the operation of the grain unloading barrel, wherein:
the input signal composition comprises: the left limit switch is used for inputting a left limit signal to the CPU processing unit;
the right limit switch is used for inputting a right limit signal to the CPU processing unit; the grain unloading cylinder zero sensor is used for positioning the position of the grain unloading cylinder bracket and judging the position of the grain unloading cylinder;
the output signal composition comprises a hydraulic motor left-turn electromagnetic valve and a hydraulic motor right-turn electromagnetic valve, so that the CPU processing unit limits the grain unloading barrel to rotate left according to the left limiting signal and through the hydraulic motor left-turn electromagnetic valve, and limits the grain unloading barrel to rotate right according to the right limiting signal and through the hydraulic motor right-turn electromagnetic valve;
the CPU processing unit can memorize the rotating direction of the grain unloading barrel according to the zero sensor of the grain unloading barrel.
2. The combine harvester grain unloading drum return control system of claim 1, wherein the input signal component further comprises a grain unloading drum high limit sensor and a grain unloading drum support sensor; the output signal assembly also comprises a grain unloading cylinder ascending electromagnetic valve and a grain unloading cylinder descending electromagnetic valve;
the grain unloading cylinder high limit sensor is used for inputting a rising limit signal to the CPU processing unit;
the grain unloading cylinder bracket sensor is used for inputting a descending limit signal to the CPU processing unit;
the CPU processing unit limits the grain unloading cylinder to ascend through the grain unloading cylinder ascending electromagnetic valve according to the ascending limit signal;
and the CPU processing unit limits the grain unloading cylinder to descend according to the descending limit signal and through the grain unloading cylinder descending electromagnetic valve.
3. The combine harvester grain unloading drum return control system of claim 1 or 2, further comprising a power system, wherein the power system is electrically connected with the return control system; the power system is used for driving the grain unloading barrel to ascend, descend, rotate left and rotate right.
4. The return control system of the grain unloading cylinder of the combine harvester according to claim 3, characterized in that the input signal assembly further comprises a grain unloading cylinder control panel, and the grain unloading cylinder control panel is provided with a rising button, a falling button, a left-handed button, a right-handed button and an automatic return button;
the lifting button is used for manually controlling the grain unloading barrel to lift and run;
the descending button is used for manually controlling the grain unloading barrel to descend;
the left-handed button is used for manually controlling the grain unloading barrel to run in a left-handed mode;
the right-handed button is used for manually controlling the grain unloading barrel to operate rightwards.
5. A combine harvester comprising a return control system, wherein the return control system is a combine harvester discharge tube return control system as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921338852.6U CN211378824U (en) | 2019-08-16 | 2019-08-16 | Combine unloads grain section of thick bamboo return control system and combine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921338852.6U CN211378824U (en) | 2019-08-16 | 2019-08-16 | Combine unloads grain section of thick bamboo return control system and combine |
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| Publication Number | Publication Date |
|---|---|
| CN211378824U true CN211378824U (en) | 2020-09-01 |
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| CN201921338852.6U Active CN211378824U (en) | 2019-08-16 | 2019-08-16 | Combine unloads grain section of thick bamboo return control system and combine |
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| Country | Link |
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| CN (1) | CN211378824U (en) |
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