CN111819993A - A combined harvester cutting height detection device - Google Patents

Abstract

The invention discloses a stubble height detection device for a combine harvester, which comprises a profiling pallet, a rotating shaft, a sensor swing arm and an angle sensor. The profiling pallet is connected with the rotating shaft, and both the profiling pallet and the rotating shaft are located in the combine harvester At the bottom of the header of the machine, the profiling pallet can be offset against the cutting stubble, and an elastic piece is arranged between the profiling pallet and the header of the combine harvester. The header is connected, the rotating shaft is connected with the sensor swing arm transmission, the rotating shaft can drive the sensor to rotate, the sensor swing arm is connected with the angle sensor, and the angle sensor can detect the rotation angle of the sensor swing arm. During the operation of the combine harvester, the profiling pallet abuts against the cut stubble, and the profiling pallet drives the rotating shaft to rotate with the change of the height of the cut stubble, and the rotating shaft transmits the angle change to the angle sensor through the sensor swing arm, which can be used for Next, prepare for the height adjustment of the combine harvester.

Description

A combined harvester cutting height detection device

technical field

The invention relates to the technical field of agricultural machinery and its surrounding supporting facilities, in particular to a stubble height detection device of a combine harvester.

Background technique

With the proposal and continuous development of precision agriculture and smart agriculture, the importance of unmanned and automated agricultural machinery in the field of agricultural machinery has become more and more prominent, which will greatly improve the accuracy of farmland operations while reducing the labor intensity of operators. As a kind of agricultural machinery widely used in the agricultural field, the combine harvester is a traditional manual control of the lifting and lowering of the header, and the height of the stubble will fluctuate greatly. Too high or too low stubble will be detrimental to the harvest of crops. influences.

The Chinese patent with the publication number CN102282963A discloses a stubble height intelligent detection device, which adopts a pipe sleeve with a sliding pipe and a reed switch array inside the package installed between the harvester body and the header. Output the height signal of the header to measure the height of the stubble of the harvester and prepare for the subsequent processing and analysis of the signal. This device has high sensitivity and high measurement accuracy. However, agricultural machinery will generate large mechanical vibration during driving. Mechanical vibration will easily damage the sealing of the reed switch or cause the sensitivity to change due to the mechanical pressure generated, and its service life will be changed. And the measurement accuracy will be reduced accordingly.

Therefore, how to change the current situation in the prior art that the combine harvester cannot accurately measure the height of the stubble has become an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a stubble height detection device for a combine harvester to solve the problems existing in the prior art, so that the combine harvester can accurately detect the stubble height and improve the accuracy of data measurement.

In order to achieve the above purpose, the present invention provides the following solutions: the present invention provides a device for detecting the height of stubble of a combine harvester, which includes a profiling pallet, a rotating shaft, a sensor swing arm and an angle sensor, and the profiling pallet is connected to the The rotating shaft is connected, the profiling pallet and the rotating shaft are both located at the bottom of the header of the combine harvester, the profiling pallet can offset the cutting stubble, and the profiling pallet is connected to the cutting edge of the combine harvester. An elastic member is arranged between the tables, the elastic member is in a compressed state, the rotating shaft is rotatably connected to the header of the combine harvester, the rotating shaft is connected to the sensor swing arm in a drive, and the rotating shaft can The sensor is driven to rotate, the sensor swing arm is connected with the angle sensor, and the angle sensor can detect the rotation angle of the sensor swing arm.

Preferably, the rotating shaft is connected to the sensor swing arm through a fork, the rotating shaft is connected to the fork, the fork has a chute, and one end of the sensor swing arm away from the angle sensor has a A connecting column is slidably arranged in the chute.

Preferably, the angle sensor is fixed on the header of the combine harvester by using several types of brackets.

Preferably, the profiling support plate is a pan-shaped structure, and the profiling support board includes a bottom plate, a back plate connected to the bottom plate, and two side plates, and the two side plates are respectively connected with the back plate of the back plate. Both ends are connected, the back plate and the side plate are both perpendicular to the bottom plate, the bottom plate can be in contact with the stubble, and the opening of the profiling support plate is arranged in a direction away from the header of the combine harvester.

Preferably, a support seat is provided on the back plate, and the support seat is connected with the rotation shaft.

Preferably, the support base is of a split structure, and the support base is detachably connected to the back plate.

Preferably, the elastic member is a hinge spring, the elastic member is sleeved on the outside of the rotating shaft, and the profiling pallet and the header of the combine harvester are respectively abutted against the elastic member.

Preferably, a linear bearing is provided on the header of the combine harvester, and the rotating shaft passes through the linear bearing and is connected to the sensor swing arm in a driving manner.

Preferably, the number of the angle sensors is two, the two angle sensors are respectively disposed at both ends of the rotating shaft, and the number of the sensor swing arms is consistent with the number of the angle sensors and has a one-to-one correspondence .

Preferably, the effective stroke of the angle sensor is 60°.

Compared with the prior art, the present invention achieves the following technical effects: the stubble height detection device of the combine harvester of the present invention includes a profiling pallet, a rotating shaft, a sensor swing arm and an angle sensor, and the profiling pallet is connected to the rotating shaft, Both the profiling pallet and the rotating shaft are located at the bottom of the combine harvester's header, the profiling pallet can be offset against the stubble, an elastic piece is arranged between the profiling pallet and the header of the combine harvester, and the elastic piece is in a compressed state The rotating shaft is rotatably connected with the header of the combine harvester, the rotating shaft is connected with the sensor swing arm drive, the rotating shaft can drive the sensor to rotate, the sensor swing arm is connected with the angle sensor, and the angle sensor can detect the rotation angle of the sensor swing arm. The device for detecting the height of the stubble of the combine harvester of the invention, when the combine harvester is operating, the profiling pallet abuts against the stubble, and the profiling pallet drives the rotating shaft to rotate with the change of the height of the stubble, and the rotating shaft rotates the angle of the stubble. Changes are communicated to the angle sensor via the sensor swing arm. The stubble height detection device of the combine harvester of the invention has a compact structure and strong adaptability, and an elastic member is arranged between the profiling pallet and the header of the combine harvester, so that the operator can be used in different working environments and larger machinery. The measurement of the stubble height is completed under vibration, which can prepare for the subsequent height adjustment of the combine harvester.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

Fig. 1 is the structural representation of the combine harvester cutting height detection device of the present invention;

Fig. 2 is the enlarged schematic diagram of the partial structure of the stubble height detection device of the combine harvester of the present invention;

Fig. 3 is the principle schematic diagram of the combine harvester cutting height detection device of the present invention;

Among them, 1 is a profiling pallet, 101 is a bottom plate, 102 is a back plate, 103 is a side plate, 2 is a rotating shaft, 3 is a sensor swing arm, 4 is an angle sensor, 5 is an elastic piece, 6 is a fork, 7 is the chute, 8 is the connecting column, 9 is the bracket, 10 is the support seat, 11 is the linear bearing, 12 is the header of the combine harvester, AC is the length of the center point of the rotation wheelbase angle sensor (mm); AB is the Angle sensor swing arm length (mm); CD is the height of the profiling pallet (mm); H is the height from the bottom of the profiling pallet to the cutter (mm).

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a stubble height detection device of a combine harvester, so as to solve the problems existing in the above-mentioned prior art, so that the combine harvester can accurately detect the stubble height and improve the accuracy of data measurement.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1-3, wherein, FIG. 1 is a schematic structural diagram of the device for detecting the height of stubble in a combine harvester according to the present invention, and FIG. 2 is an enlarged schematic view of a partial structure of the device for detecting the height of stubble in a combine harvester according to the present invention, and FIG. 3 It is a schematic diagram of the principle of the stubble height detection device of the combine harvester of the present invention.

The present invention provides a stubble height detection device for a combine harvester, comprising a profiling pallet 1, a rotating shaft 2, a sensor swing arm 3 and an angle sensor 4, the profiling pallet 1 is connected with the rotating shaft 2, and the profiling pallet 1 and the rotating shaft 2 are both located at the bottom of the header 12 of the combine harvester, the profiling pallet 1 can be offset against the cutting stubble, an elastic member 5 is arranged between the profiling pallet 1 and the header 12 of the combine harvester, and the elastic piece 5 is located at the bottom of the header 12 of the combine harvester. In the compressed state, the rotating shaft 2 is rotatably connected to the header 12 of the combine harvester, the rotating shaft 2 is connected to the sensor swing arm 3 through transmission, the rotating shaft 2 can drive the sensor to rotate, the sensor swing arm 3 is connected to the angle sensor 4, and the angle The sensor 4 can detect the rotation angle of the sensor swing arm 3 .

In the combined harvester cutting height detection device of the present invention, when the combine harvester is operating, the profiling pallet 1 is in contact with the cutting stubble, and the profiling pallet 1 further drives the rotating shaft 2 to rotate with the change of the cutting stubble height. The shaft 2 transmits the angle change to the angle sensor 4 through the sensor swing arm 3 . The stubble height detection device of the combine harvester of the present invention has a compact structure and strong adaptability, and an elastic member 5 is arranged between the profiling pallet 1 and the header 12 of the combine harvester, so as to improve the stability of the device and realize that the operator can The measurement of the height of the stubble can be completed in the same working environment and under large mechanical vibration, which can prepare for the subsequent height adjustment of the header 12 of the combine harvester.

Specifically, the rotating shaft 2 is connected to the sensor swing arm 3 through a fork 6, the rotating shaft 2 is connected to the fork 6, the fork 6 has a chute 7, and the end of the sensor swing arm 3 away from the angle sensor 4 has a connecting column 8, which connects The column 8 is slidably arranged in the chute 7 . The rotating shaft 2, the fork 6 and the sensor swing arm 3 constitute a crank-slider structure, so that the rotating shaft 2 transmits the angle change to the angle sensor 4, the structure is stable and reliable, and the accuracy of data measurement is further improved.

In this specific embodiment, the angle sensor 4 is fixed on the header 12 of the combine harvester by using a type bracket 9, and the type bracket 9 provides a stable fixed support for the angle sensor 4 and does not affect the sensor swing arm 3 and the angle sensor 4. connect.

Wherein, the profiling pallet 1 has a pan-shaped structure, and the profiling pallet 1 includes a bottom plate 101 , a back plate 102 connected to the bottom plate 101 , and two side plates 103 , and the two side plates 103 are respectively connected with both ends of the back plate 102 . , the two side plates 103 and the back plate 102 are connected to form a U shape, the back plate 102 and the side plates 103 are both perpendicular to the bottom plate 101, the bottom plate 101 can be offset with the stubble, and the opening of the profiling pallet 1 faces away from the combine harvester The height of the side plate 103 is gradually reduced from the back plate 102 .

More specifically, a support base 10 is provided on the back plate 102 , the support base 10 is connected with the rotating shaft 2 , the copying pallet 1 is connected with the rotating shaft 2 by the support base 10 , and the rotating shaft 2 is connected with the support base 10 through the side plate 103 . .

In this specific embodiment, the support base 10 is a split structure, which is easy to disassemble and assemble, and the support base 10 is detachably connected to the back plate 102, which is convenient for cleaning and maintenance of the device.

In addition, the elastic member 5 is a hinge spring, the elastic member 5 is sleeved on the outside of the rotating shaft 2, the profiling pallet 1 and the header 12 of the combine harvester are respectively abutted against the elastic member 5, and the elastic member 5 improves the stability of the device, Avoid problems such as shaking and dislocation during the working process of the device, and improve the accuracy of the measurement results.

In other specific embodiments of the present invention, a linear bearing 11 is provided on the header 12 of the combine harvester, and the rotating shaft 2 passes through the linear bearing 11 and is connected to the sensor swing arm 3 for transmission.

Further, the number of angle sensors 4 is two, and the two angle sensors 4 are respectively disposed at both ends of the rotating shaft 2 . During operation, the angle sensors 4 at both ends of the rotating shaft 2 receive the data of the cutting height at the left and right ends at the same time, and compare and analyze the two sets of data, which improves the accuracy of the measurement results.

In order to ensure that the angle sensor 4 can work normally, the effective travel of the angle sensor 4 is 60°.

The formula for converting the angle to height after the angle sensor 4 measures the angle is listed below:

H=CD*sin(θ ₄ -θ ₃ +θ ₂ )

In the formula, AC is the length (mm) between the rotation axis 2 and the center point of the angle sensor 4; AB is the length (mm) of the swing arm 3 of the angle sensor 4; CD is the height of the profiling pallet 1 (mm); H is the profiling pallet 1 The height from the bottom to the cutting knife (mm), see Figure 3 for details of each angle in the formula. The stubble height detecting device of the combine harvester of the invention has stable and reliable structure, simple conversion formula, and further improves the accuracy of data measurement.

In the present invention, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. a combine harvester cutting height detection device, it is characterized in that: comprise a profiling pallet, a rotating shaft, a sensor swing arm and an angle sensor, the profiling pallet is connected with the rotating shaft, and the profiling pallet is Both the pallet and the rotating shaft are located at the bottom of the header of the combine harvester, the profiling pallet can be offset against the stubble, an elastic piece is arranged between the profiling pallet and the header of the combine harvester, the The elastic member is in a compressed state, the rotating shaft is rotatably connected to the header of the combine harvester, the rotating shaft is drivingly connected with the sensor swing arm, the rotating shaft can drive the sensor to rotate, and the sensor The swing arm is connected with the angle sensor, and the angle sensor can detect the rotation angle of the swing arm of the sensor. 2 . The stubble height detection device of a combine harvester according to claim 1 , wherein the rotating shaft is connected to the sensor swing arm through a fork frame, the rotating shaft is connected to the fork frame, and the The fork is provided with a chute, and one end of the sensor swing arm away from the angle sensor has a connection post, and the connection post is slidably arranged in the chute. 3 . The stubble height detection device of a combine harvester according to claim 2 , wherein the angle sensor is fixed on the header of the combine harvester by using several types of brackets. 4 . 4 . The stubble height detection device of a combine harvester according to claim 1 , wherein the profiling support plate is a pan-shaped structure, and the profiling support plate comprises a bottom plate and a back plate connected with the bottom plate. 5 . , Two side plates, the two side plates are respectively connected with the two ends of the back plate, the back plate and the side plates are both perpendicular to the bottom plate, the bottom plate can be in contact with the stubble, so The opening of the profiling pallet is arranged in a direction away from the header of the combine harvester. 5 . The stubble height detection device of a combine harvester according to claim 4 , wherein a support seat is provided on the back plate, and the support seat is connected with the rotating shaft. 6 . 6 . The stubble height detection device of a combine harvester according to claim 5 , wherein the support base is a split structure, and the support base is detachably connected to the back plate. 7 . 7 . The stubble height detection device of a combine harvester according to claim 1 , wherein the elastic member is a hinge spring, the elastic member is sleeved on the outside of the rotating shaft, and the profiling pallet, The headers of the combine harvester are respectively abutted against the elastic members. 8 . The stubble height detection device of a combine harvester according to claim 1 , wherein a linear bearing is arranged on the header of the combine harvester, and the rotating shaft passes through the linear bearing and the sensor swing arm. 9 . Transmission is connected. 9 . The stubble height detection device of a combine harvester according to claim 1 , wherein the number of the angle sensors is two, and the two angle sensors are respectively arranged on the rotating shaft. 10 . At both ends of the sensor, the number of the sensor swing arms is consistent with the number of the angle sensors and corresponds one-to-one. 10 . The stubble height detection device of a combine harvester according to claim 1 , wherein the effective stroke of the angle sensor is 60°. 11 .

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