CN113678634A - Controllable profile modeling device of angle for cotton picker - Google Patents
Controllable profile modeling device of angle for cotton picker Download PDFInfo
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- CN113678634A CN113678634A CN202110894267.XA CN202110894267A CN113678634A CN 113678634 A CN113678634 A CN 113678634A CN 202110894267 A CN202110894267 A CN 202110894267A CN 113678634 A CN113678634 A CN 113678634A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D46/00—Picking of fruits, vegetables, hops, or the like; Devices for shaking trees or shrubs
- A01D46/08—Picking of fruits, vegetables, hops, or the like; Devices for shaking trees or shrubs of cotton
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D67/00—Undercarriages or frames specially adapted for harvesters or mowers; Mechanisms for adjusting the frame; Platforms
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D75/00—Accessories for harvesters or mowers
- A01D75/18—Safety devices for parts of the machines
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Abstract
The invention relates to an angle-controllable profiling device for a cotton picker, which comprises a separating and gathering device shield and a separating and gathering device framework, wherein the separating and gathering device framework is of an L-shaped structure, an angle adjusting block is arranged on the vertical inner surface of the separating and gathering device framework, the angle adjusting block and the separating and gathering device framework are limited by a first pin shaft, and one end part of the angle adjusting block is fixed with one end of a linkage shaft by a second pin shaft; the linkage shaft is connected with the angle adjusting block and a copying transverse shaft, and the copying transverse shaft is horizontally arranged on the transverse inner surface of the frame of the separator; the upper end surface, the lower end surface, the inner end surface and the lower end surface of the separator framework are provided with horizontal limiting plates, the imitated cross shaft is limited below the horizontal limiting plates, and the horizontal limiting plates are provided with limiting through holes through which the linkage shafts penetrate; an angle sensor is arranged on the angle adjusting block; when the lower surface of the copying cross shaft is flush with the lower surface of the divider framework, the reading of the angle sensor is a correction zero point. The profiling device is simple in structure, small in occupied size, capable of monitoring and adjusting the height of the cotton picking head in real time according to the angle of the ground during profiling, convenient and flexible to use and low in overhaul cost.
Description
Technical Field
The invention belongs to the technical field of cotton pickers, and particularly relates to an angle-controllable profiling device for a cotton picker.
Background
The cotton is a main economic crop in Xinjiang area in China, along with the development of science and technology, the agricultural production tends to be mechanized step by step, the manual picking of the cotton wastes time and labor, and the requirement of mechanized production is not met. In the cotton picker working in the cotton field, due to poor flatness of the cotton field, a cotton picking head of the cotton picker is easy to touch the ground or be inserted into a soil pile during working, and a cotton picking head body can be damaged seriously to influence the normal working of the cotton picker.
In the cotton picker in the prior art, a hydraulic profiling device is additionally arranged on a cotton picking head, and the hydraulic profiling device can float the cotton picking head on the ground, so that the possibility of inserting the cotton picking head into the ground is reduced; however, this structure copying apparatus has the following problems: the profiling height is not adjustable, and the angle is not controllable; the cotton picker has more hydraulic profiling hydraulic pipelines and high cost; the hydraulic copying valve has abrasion and leakage, so that the service life is influenced; because the hydraulic copying device is arranged at the front lower end of the cotton picker, the copying device cannot be timely transmitted to the control system after the copying is invalid, and the alarm system is insensitive.
Chinese patent CN 103703931B of the invention provides an electronic copying device for a cotton picker, which moves up and down along a copying guide rail shaft through a copying guide rail, and drives a copying fork and a sensor to move synchronously, and the copying device needs to rely on the synchronous stability of the copying guide rail, the copying fork and the sensor to a great extent; the height adjustment flexibility is poor, and the structure is complicated, and area occupied is big, and real-time monitoring and later stage inspection cost of maintenance are high when using.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects, the invention provides the angle-controllable profiling device for the cotton picker, which has the advantages of simple structure, small occupied volume, capability of adjusting the angle according to the ground angle during profiling, real-time monitoring and adjustment of the height of a cotton picking head, convenience and flexibility in use and low overhaul cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: an angle-controllable profiling device for a cotton picker comprises a separating and gathering device shield and a separating and gathering device framework, wherein the separating and gathering device framework is of an L-shaped structure, and the separating and gathering device shield covers the oblique edge of the separating and gathering device framework; an angle adjusting block is arranged on the vertical inner surface of the separator framework, the angle adjusting block and the separator framework are attached and limited through a first pin shaft, and one end part of the angle adjusting block is fixed with one end of a linkage shaft through a second pin shaft; the linkage shaft is connected with the angle adjusting block and the tracing cross shaft, and the tracing cross shaft is horizontally arranged on the transverse inner surface of the separator framework; the upper end face, the lower end face, the inner end face and the lower end face of the separator framework are provided with horizontal limiting plates, the imitated transverse shaft is limited below the horizontal limiting plates, and the horizontal limiting plates are provided with limiting through holes through which the linkage shafts penetrate;
the angle adjusting block comprises a first plate body, a second plate body and a third plate body, the first plate body is of a square structure, the second plate body is of a rectangular structure, the lower bottom edge of the second plate body is connected with the first side edge of the first plate body of the square structure, and the length of the lower bottom edge of the connected first plate body is smaller than that of the first side edge of the first plate body; the third plate body is of a triangular structure, and an included angle is formed between the right-angle sides of the third plate body and the second plate body; the second pin shaft penetrates through a second pin hole in the third plate body to lock the linkage shaft and the third plate body;
the divider framework is also provided with a first limiting pin and a second limiting pin which correspond to the angle adjusting block, the first limiting pin is arranged above the first side edge of the first plate body and the bevel edge of the second plate body, and the second limiting pin is arranged below the connecting end part of the second side edge and the third side edge of the first plate body;
an angle sensor is arranged on the angle adjusting block; when the lower surface of the profiling cross shaft is flush with the lower surface of the divider framework, the reading of the angle sensor is a correction zero point.
The profiling device is conducted through an angle adjusting block which can flexibly rotate and a linkage shaft which is fixedly connected with the angle adjusting block, so that the distance between a profiling transverse shaft and the ground is adjusted; the angle sensor monitors the changed angle of the angle sensor and compares the changed angle with a preset value of the cotton picker, so that the profiling height and the floating direction of the cotton picking head are controlled; the profiling device has a simple structure and small occupied volume; the plurality of guide rails which do not need linkage are supported and driven, the use is convenient and flexible, and the overhaul cost is low.
The first plate body is provided with a first side edge and a second side edge, and the first side edge is connected with the second side edge; the angle adjusting block moves among the first limiting pin, the second limiting pin and the third limiting pin in a distance limiting mode. The third limiting pin is introduced, the angle adjusting block is limited together with the first limiting pin and the second limiting pin, the angle adjusting block is prevented from slipping from one side face, and the service life and the stability of the profiling device are improved.
Furthermore, the angle adjusting block is provided with a first pin hole through which a first pin shaft penetrates, and the first pin hole is formed in the center of gravity of the angle adjusting block. First round pin axle passes the first pinhole of setting on the angle adjusting block focus, can ensure that the angle adjusting block can not adjust because of focus unbalance when rotating, error when reducing the adjustment of profile modeling diaphragm.
Furthermore, the angle adjusting block is provided with lightening holes, and the lightening holes are formed in the periphery of the first plate body. The lightening holes are introduced, so that the weight of the angle adjusting block can be reduced, the pressure required by the angle adjusting block and the universal driving shaft is further improved, and the use is convenient and flexible.
Furthermore, a gasket is arranged on the contact surface of the angle adjusting block and the first pin shaft.
Further, the linkage shaft comprises a shaft rod, a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are arranged at two ends of the shaft rod;
the first connecting part is a hollow ring and a threaded rod arranged below the hollow ring, the threaded rod is in threaded connection with the shaft rod, and the second pin shaft is in interference fit with the hollow ring;
the second connecting part comprises an L-shaped pipe body, a first reinforcing support and a second reinforcing support, the first reinforcing support is arranged on the outer side surface of the L-shaped pipe body, the second reinforcing support is arranged at the end part of the L-shaped pipe body, the first reinforcing support is arranged on the inner upper surface of the profiling cross shaft, and the second reinforcing support is arranged on the inner side surface of the profiling cross shaft; the other end of the L-shaped pipe body is integrally formed with the shaft rod. The linkage shaft and a second pin shaft fixed on the angle adjusting block are locked through a hollow ring, so that the rotation stability of the linkage shaft and the angle adjusting block is good, and slippage cannot occur; the linkage shaft and the profiling cross shaft can improve the connection strength between the linkage shaft and the profiling cross shaft through two reinforcing supports, and the profiling device is simple in structure and stable in use.
Furthermore, the length of the limiting through hole is the offset of the linkage shaft when the angle adjusting block moves between the first limiting pin and the second limiting pin. The overturning angle of the angle adjusting block is limited by controlling the length of the limiting through hole, so that the phenomenon that the angle of a profiling cross shaft is deviated due to the calculation error of a profiling device or the failure of a linkage shaft, and the angle of a cotton picking head of the cotton picker is inclined is avoided; and a limiting through hole is limited, the control is accurate, and the failure rate is low.
Furthermore, an arc-shaped plate is arranged below the profiling cross shaft and is in a hook shape. The hook-shaped arc-shaped plate is introduced, the distance between the profiling transverse plate and the ground is judged and adjusted through one point at the lowest point, and the use is flexible.
Further, the angle sensor is connected to a signal conversion device, and the signal conversion device is electrically connected with the cotton picker monitoring device. The signal monitored by the angle sensor is connected with the cotton picker monitoring device through the signal conversion device, the using state of the cotton picker is monitored in real time, and the alarm is given in time when a fault occurs.
Furthermore, the splitter shield comprises an inner shield body and an outer shield body, and the inner shield body covers one side surface and one part of the other side surface of the splitter framework; the outer cover body covers the oblique edge and the horizontal straight edge of the separator framework and has a gap with the vertical edge;
the gap formed by the inner cover body, the outer cover body and the separator framework is an observation and maintenance cavity. The collector separating shield covers the cotton picking head and the like, so that the cotton picking part is effectively prevented from being damaged; the angle adjusting block is partially exposed, so that whether the angle adjusting block operates normally or not can be conveniently observed, and the angle adjusting block is convenient to overhaul.
The invention has the beneficial effects that:
1. the profiling device is conducted through an angle adjusting block which can flexibly rotate and a linkage shaft which is fixedly connected with the angle adjusting block, so that the distance between a profiling transverse shaft and the ground is adjusted; the angle sensor monitors the changed angle of the angle sensor and compares the changed angle with a preset value of the cotton picker, so that the profiling height and the floating direction of the cotton picking head are controlled; the profiling device has a simple structure and small occupied volume; the plurality of guide rails which do not need linkage are supported and driven, the use is convenient and flexible, and the overhaul cost is low.
2. A third limiting pin is introduced to limit the angle adjusting block together with the first limiting pin and the second limiting pin, so that the angle adjusting block is prevented from slipping from one side surface, and the service life and the stability of the profiling device are improved; the first pin shaft penetrates through a first pin hole formed in the center of gravity of the angle adjusting block, so that the angle adjusting block can be prevented from being adjusted due to unbalanced center of gravity when rotating, and errors in adjustment of the profiling transverse plate are reduced; the lightening holes are introduced, so that the weight of the angle adjusting block can be reduced, the pressure required by the angle adjusting block and the universal driving shaft is further improved, and the use is convenient and flexible.
3. The linkage shaft and a second pin shaft fixed on the angle adjusting block are locked through a hollow ring, so that the rotation stability of the linkage shaft and the angle adjusting block is good, and slippage cannot occur; the linkage shaft and the profiling cross shaft can improve the connection strength between the linkage shaft and the profiling cross shaft through two reinforcing supports, and the profiling device is simple in structure and stable in use; the overturning angle of the angle adjusting block is limited by controlling the length of the limiting through hole, so that the phenomenon that the angle of a profiling cross shaft is deviated due to the calculation error of a profiling device or the failure of a linkage shaft, and the angle of a cotton picking head of the cotton picker is inclined is avoided; and a limiting through hole is limited, the control is accurate, and the failure rate is low.
4. A hook-shaped arc-shaped plate is introduced, the distance between the profiling transverse plate and the ground is judged and adjusted through one point at the lowest point, and the use is flexible; the signal monitored by the angle sensor is connected with the cotton picker monitoring device through the signal conversion device, the using state of the cotton picker is monitored in real time, and the alarm is given in time when a fault occurs.
5. The collector separating shield covers the cotton picking head and the like, so that the cotton picking part is effectively prevented from being damaged; the angle adjusting block is partially exposed, so that whether the angle adjusting block operates normally or not can be conveniently observed, and the angle adjusting block is convenient to overhaul.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic view of an angle adjusting block and a linkage shaft according to the present invention;
wherein: the device comprises a splitter shield 1, an inner shield 11, an outer shield 12, a splitter framework 2, an angle adjusting block 3, a first plate 31, a second plate 32, a third plate 33, a first limiting pin 34, a second limiting pin 35, a third limiting pin 36, a first pin hole 37, a second pin hole 38, an angle sensor 39, a lightening hole 30, a first pin shaft 4, a gasket 41, a second pin shaft 5, a linkage shaft 6, a shaft rod 61, a first connecting part 62, a hollow ring 621, a threaded rod 622, a second connecting part 63, an L-shaped pipe 631, a first reinforcing support 632, a second reinforcing support 633, a profiling cross shaft 7, an arc-shaped plate 71, a horizontal limiting plate 8 and a limiting through hole 81.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the angle-controllable profiling device for the cotton picker comprises a separating and gathering device shield 1 and a separating and gathering device framework 2, wherein the separating and gathering device framework 2 is of an L-shaped structure, and the separating and gathering device shield 1 is arranged on the oblique edge of the separating and gathering device framework 2; an angle adjusting block 3 is arranged on the vertical inner surface of the ridging device framework 2, the angle adjusting block 3 and the ridging device framework 2 are attached and limited through a first pin shaft 4, and one end of the angle adjusting block 3 is fixed with one end of a linkage shaft 6 through a second pin shaft 5; the linkage shaft 6 is connected with the angle adjusting block 3 and the tracing cross shaft 7, and the tracing cross shaft 7 is horizontally arranged on the transverse inner surface of the separator framework 2; a horizontal limiting plate 8 is arranged on the upper end surface, the lower end surface and the inner end surface of the separator framework 2, the imitated transverse shaft 7 is limited below the horizontal limiting plate 8, and a limiting through hole 81 through which the linkage shaft 6 passes is arranged on the horizontal limiting plate 8; an arc-shaped plate 71 is arranged below the profiling cross shaft, and the arc-shaped plate 71 is in a hook shape; the angle sensor 39 is connected to a signal conversion device which is electrically connected to the cotton picker monitoring device.
The angle adjusting block 3 comprises a first plate body 31, a second plate body 32 and a third plate body 33, the first plate body 31 is of a square structure, the second plate body 32 is of a rectangular structure, the lower bottom edge of the second plate body 32 is connected with the first side edge of the first plate body 31 of the square structure, and the length of the lower bottom edge of the connected first plate body 31 is smaller than that of the first side edge of the first plate body 31; the third plate body 33 is a triangular structure, and an included angle is formed between the right-angle sides of the third plate body 33 and the second plate body 32; the second pin shaft 5 penetrates through a second pin hole 38 on the third plate body 33 to lock the linkage shaft 6 and the third plate body 33; a first pin hole 37 through which the first pin shaft 4 penetrates is formed in the angle adjusting block 3, the first pin hole 37 is formed in the center of gravity of the angle adjusting block 3, and a gasket 41 is arranged on the contact surface of the angle adjusting block 3 and the first pin shaft 4; the angle adjusting block 3 is provided with lightening holes which are arranged on the periphery of the first plate body 31.
An angle sensor 39 is arranged on the angle adjusting block 3; when the lower surface of the tracing cross shaft 7 is flush with the lower surface of the divider framework 2, the reading of the angle sensor 39 is a correction zero point.
The divider framework 2 is also provided with a first limiting pin 34 and a second limiting pin 35 corresponding to the angle adjusting block 3, the first limiting pin 34 is arranged above the inclined edges of the first side edge of the first plate body 31 and the second plate body 32, and the second limiting pin 35 is arranged below the connecting end part of the second side edge and the third side edge of the first plate body 31; the first limiting pin 36 is arranged on the outer side of the end part where the first side edge and the second side edge of the first plate body 31 are connected; the angle adjusting block 3 moves among the limited distances of the first limit pin 34, the second limit pin 35 and the third limit pin 36; the length of the limiting through hole 81 for the linkage shaft 6 to pass through is the offset of the linkage shaft 6 when the angle adjusting block 3 moves between the first limiting pin 34 and the second limiting pin 35.
The linkage shaft 6 comprises a shaft rod 61, a first connecting part 62 and a second connecting part 63 which are arranged at two ends of the shaft rod 61; the first connecting part 62 is a hollow ring 621 and a threaded rod 622 arranged below the hollow ring 621, the threaded rod 622 is in threaded connection with the shaft rod 61, and the second pin shaft 5 is in interference fit with the hollow ring 621; the second connecting portion 63 includes an L-shaped tube 631, a first reinforcing brace 632 disposed on the outer surface of the L-shaped tube 631, and a second reinforcing brace 633 disposed at the end of the L-shaped tube 631, wherein the first reinforcing brace 632 is disposed on the inner upper surface of the horizontal axis, and the second reinforcing brace 633 is disposed on the inner surface of the horizontal axis; the other end of the L-shaped tube 631 is integrally formed with the shaft 61.
The splitter shield comprises an inner shield body 11 and an outer shield body 12, wherein the inner shield body 11 covers one side surface and one part of the other side surface of the splitter framework; the outer cover body 12 covers the oblique edge and the horizontal straight edge of the frame of the separator, and a gap is reserved between the oblique edge and the vertical edge; the gap formed by the inner cover body 11, the outer cover body 12 and the separator framework is an observation and maintenance cavity.
Besides, a distance sensor for monitoring the distance from the ground can be arranged at the lower end part of the splitter framework. The position of the profiling cross shaft is judged in real time by adopting two modes of distance monitoring and angle monitoring, so that the profiling effect of the profiling device is further improved.
The profiling device is conducted through an angle adjusting block which can flexibly rotate and a linkage shaft which is fixedly connected with the angle adjusting block, so that the distance between a profiling transverse shaft and the ground is adjusted; the angle sensor monitors the changed angle of the angle sensor and compares the changed angle with a preset value of the cotton picker, so that the profiling height and the floating direction of the cotton picking head are controlled; the profiling device has a simple structure and small occupied volume; the plurality of guide rails which do not need linkage are supported and driven, the use is convenient and flexible, and the overhaul cost is low.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. An angle-controllable profiling device for a cotton picker comprises a separating and gathering device shield and a separating and gathering device framework, wherein the separating and gathering device framework is of an L-shaped structure, and the separating and gathering device shield is arranged on the oblique edge of the separating and gathering device framework; the method is characterized in that: an angle adjusting block is arranged on the vertical inner surface of the separator framework, the angle adjusting block and the separator framework are attached and limited through a first pin shaft, and one end part of the angle adjusting block is fixed with one end of a linkage shaft through a second pin shaft; the linkage shaft is connected with the angle adjusting block and the tracing cross shaft, and the tracing cross shaft is horizontally arranged on the transverse inner surface of the separator framework; the upper end face, the lower end face, the inner end face and the lower end face of the separator framework are provided with horizontal limiting plates, the imitated transverse shaft is limited below the horizontal limiting plates, and the horizontal limiting plates are provided with limiting through holes through which the linkage shafts penetrate;
the angle adjusting block comprises a first plate body, a second plate body and a third plate body, the first plate body is of a square structure, the second plate body is of a rectangular structure, the lower bottom edge of the second plate body is connected with the first side edge of the first plate body of the square structure, and the length of the lower bottom edge of the connected first plate body is smaller than that of the first side edge of the first plate body; the third plate body is of a triangular structure, and an included angle is formed between the right-angle sides of the third plate body and the second plate body; the second pin shaft penetrates through a second pin hole in the third plate body to lock the linkage shaft and the third plate body;
the divider framework is also provided with a first limiting pin and a second limiting pin which correspond to the angle adjusting block, the first limiting pin is arranged above the first side edge of the first plate body and the bevel edge of the second plate body, and the second limiting pin is arranged below the connecting end part of the second side edge and the third side edge of the first plate body;
an angle sensor is arranged on the angle adjusting block; when the lower surface of the profiling cross shaft is flush with the lower surface of the divider framework, the reading of the angle sensor is a correction zero point.
2. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the first plate body is provided with a first side edge and a second side edge, and the first side edge is connected with the second side edge; the angle adjusting block moves among the first limiting pin, the second limiting pin and the third limiting pin in a distance limiting mode.
3. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the angle adjusting block is provided with a first pin hole through which a first pin shaft penetrates, and the first pin hole is formed in the center of gravity of the angle adjusting block.
4. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the angle adjusting block is provided with lightening holes, and the lightening holes are formed in the periphery of the first plate body.
5. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: and a gasket is arranged on the contact surface of the angle adjusting block and the first pin shaft.
6. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the linkage shaft comprises a shaft rod, a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are arranged at two ends of the shaft rod;
the first connecting part is a hollow ring and a threaded rod arranged below the hollow ring, the threaded rod is in threaded connection with the shaft rod, and the second pin shaft is in interference fit with the hollow ring;
the second connecting part comprises an L-shaped pipe body, a first reinforcing support and a second reinforcing support, the first reinforcing support is arranged on the outer side surface of the L-shaped pipe body, the second reinforcing support is arranged at the end part of the L-shaped pipe body, the first reinforcing support is arranged on the inner upper surface of the profiling cross shaft, and the second reinforcing support is arranged on the inner side surface of the profiling cross shaft; the other end of the L-shaped pipe body is integrally formed with the shaft rod.
7. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the length of the limiting through hole is the offset of the linkage shaft when the angle adjusting block moves between the first limiting pin and the second limiting pin.
8. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: an arc-shaped plate is arranged below the profiling cross shaft and is in a hook shape.
9. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the angle sensor is connected to a signal conversion device, and the signal conversion device is electrically connected with the cotton picker monitoring device.
10. The angle-controllable profiling device for the cotton picker according to claim 1, wherein: the divider-combiner shield comprises an inner shield body and an outer shield body, wherein the inner shield body covers one side surface and one part of the other side surface of the divider-combiner framework; the outer cover body covers the oblique edge and the horizontal straight edge of the separator framework and has a gap with the vertical edge;
the gap formed by the inner cover body, the outer cover body and the separator framework is an observation and maintenance cavity.
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CN202110894267.XA CN113678634B (en) | 2021-08-05 | 2021-08-05 | Controllable copying device of angle for cotton picker |
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CN111990062A (en) * | 2020-08-19 | 2020-11-27 | 农业农村部南京农业机械化研究所 | Terrain-imitating device for harvester cutting table |
CN112753372A (en) * | 2021-02-18 | 2021-05-07 | 华南理工大学 | Copying device for roller type cotton picker |
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