JP5531709B2 - Combine cutting height detector - Google Patents

Description

  The present invention relates to a cutting height detection device for detecting the height of a combine harvesting device from a field scene.

  The harvesting device of the combine performs the harvesting operation while the operator adjusts up and down depending on the state of the field and the degree of growth of the cereal. If this reaping device is lowered too much, it will cause the weed pods to enter the field and mow, and if the reaping device is raised too much, the tip with the grain will be left behind. It is possible to move up and down within the upper and lower movement limits.

  In order to detect the ground height of the reaping device, for example, in Patent Document 1 below, the grounding body is brought into contact with the field scene at the lower end of the reaping device, and the height of the reaping device is determined by the vertical movement of the grounding body. A grounding sensor for detection is provided.

JP 2006-204144 A

  During the harvesting and harvesting operation of the combine, the mowing device may be lowered and the grounding sensor may be grounded while the grounding sensor is grounded. It must be prevented from being damaged by excessive force.

  For this reason, the above-mentioned Patent Document 1 includes a detection case that supports a grounding body that swings up and down around the front fulcrum and follows the grounding and an angle sensor that detects the swinging of the grounding body at the lower part of the cutting device. The grounding body is extended rearward and downward, and is configured to swing following the unevenness of the field scene with its rear end as a grounding point. It is supported by a rear support shaft so as to be movable between the retracted position, and when a forward external force acts on the grounding portion of the grounding body from the rear, the detection case moves from the detection position to the retracted position to prevent damage. It is configured.

  In this configuration, the detection case provided with a grounding body that swings up and down around the front fulcrum and follows the ground is pivotally supported by the rear support shaft, and the front side of the detection case that pivotally supports the grounding body is in the lower detection position. Therefore, when the aircraft moves backward while turning and moves the aircraft diagonally backward, an external force other than just behind acts on the grounding body. The detection case may be difficult to move to the upper retracted position and may be damaged.

  Therefore, in the present invention, the harvesting height detection of the combine which has a configuration in which the grounding sensor is provided at the lower part of the harvesting device of the combine and prevents damage even if the aircraft is moved obliquely backward while the grounding sensor is grounded to the field. It is an object to provide an apparatus.

The problems of the present invention are solved by the following technical means.
According to the first aspect of the present invention, the front part of the sensor mounting body (1) is pivotally supported by the horizontal axis (1a) at the lower part of the cutting device so as to be pivotable up and down. A grounding body (3) that is in contact with the surface is pivotally supported by the vertical axis (4) so as to be able to turn left and right. The combine mowing height detecting device is characterized in that a sensor (8) for detecting an angle is provided.

  In this configuration, when the aircraft is advanced, the grounding body (3) moves up and down along the unevenness of the farm scene to rotate the sensor mounting body (1) up and down around the horizontal axis (1a). The vertical rotation angle with respect to the reaping device of 1) is detected as the ground height of the reaping device by the sensor (8). Then, when the combine is moved backward while the grounding body (3) is grounded and an external force is applied to the grounding body (3) from the rear to the front, the grounding body (3) rotates left and right about the vertical axis (4). To escape external force.

  The invention according to claim 2 is that the grounding body (3) is a belt-like body that is curved in an arc shape when viewed from the side, and a rear part of the grounding body (3) is separated from the field scene. The combine cutting height detecting device according to claim 1, wherein the combine cutting height detecting device is used.

  With this configuration, the grounding body (3) is less likely to stab into the field when the combine moves backward, and the area of the grounding body (3) that touches the field scene is small, and the left and right pivots about the vertical axis (4) receive external force from the rear. Becomes smooth.

According to a third aspect of the present invention, there is provided the combined cut height detecting device according to the second aspect, wherein a rear portion of the grounding body (3) is cut into a hook shape.
With this configuration, soot and the like are less likely to accumulate in the grounding body (3), and the ground height detection of the reaping device can be continued smoothly.

  According to the first aspect of the present invention, even if an external force is applied to the grounding body (3) from behind or obliquely rearward while the grounding body (3) is in contact with the field scene and the combine is moved backward or swivel, (3) can rotate around the vertical axis (4) to release the external force and prevent the cutting height detector from being damaged.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the grounding body (3) is less likely to pierce the field scene when the combine moves backward, and the grounding body (3) contacts the field scene. When the combine is moved backward or turned while being left as it is, the external force acting on the grounding body (3) is unlikely to become excessive, and the cutting height detecting device can be prevented from being damaged.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, shavings and the like are hardly accumulated in the grounding body (3), and the accuracy of detecting the cutting height is improved.

It is a whole side view of a combine. It is the whole combine front view. It is a partial enlarged side sectional view. It is a partial enlarged side view. It is a partial enlarged plan view. FIG. It is a partially expanded side sectional view of another embodiment. It is a control block diagram which shows the flow of a control signal.

Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.
In the present specification, the left side and the right side refer to directions when the combine is directed in the forward direction (orientation for an operator riding on the combine).

  As shown in FIGS. 1 and 2, a crawler traveling device 12 having a pair of left and right traveling crawlers 11 that travel on the soil surface is disposed on the lower side of the combine body 10, and the weed basket 6 is disposed on the front end side of the body 10. A cutting device 7 including a cutting blade 13 and the like is provided. There is a cabin 15 with a cockpit 14 behind the reaping device 7, and a threshing device 16 that takes over and transports the cereals conveyed from the reaping device 7 to the upper side of the vehicle body 10 for threshing and sorting. A grain tank 17 is provided on the left rear side of 15 and temporarily stores the grains threshed and selected by the threshing device 16, and is disposed on the right side of the threshing device 16 behind the cabin 15. The auger 18 is connected to the rear part of the grain tank 17, and the grain in the grain tank 17 is discharged to the outside of the combine.

  The auger 18 is composed of a base-side main tube 18a and a tip-side front tube 18b that are internally provided with a spiral, and when the grain is discharged, the main tube 18a and the front tube 18b are integrally raised and lowered from the auger receiver 20 and the front tube 18b. Is expanded and contracted with respect to the original cylinder 18a, and the position of the discharge chute 19 at the tip is moved onto the grain tank on the truck.

  In the above combine, when the operator sits on the cockpit 14 and tilts the control lever 21 standing on the left front side to the left and right, the operator turns to the side to which it is tilted, and when it is tilted back and forth, the reaping device 7 is moved up and down. Power is transmitted to the traveling crawlers 11 and 11 to travel at an arbitrary speed. When harvesting cereals, when the threshing clutch of the reaping device 7 is turned on, the threshing lever is turned on and the threshing device 16 is driven while the threshing device 16 is driven, the cereals harvested by the reaping device 7 are threshed by the transport device. It is fed into the device 16, the grain is threshed, and the threshed grain is stored in the glen tank 17.

  In the cutting device 7, a cutting main frame 22 is pivotally supported by a pivot 24 on a support stand 23 erected on the vehicle body 10, and a portion of the lower weed ridge 6 is cut and lifted cylinder 25 around the pivot 24. FIG. In this case, it is moved up and down without being displayed. Further, a pulling device 27 provided obliquely and upwardly from the rear of the weed ridge 6 is supported by the cutting main frame 22 and the connecting frame 26 extending forward from the pivot 24. A transmission case 28 is attached to the front end of the connection frame 26 to drive the device 27.

  A cutting height detection device that detects the ground height of the cutting blade 13, that is, the cutting height of the cereal, is provided at the lower end of the cutting device 7, so that the cutting height is automatically maintained within a certain range in the vertical direction. However, the cutting height detecting device has a structure shown in FIGS.

  A sensor mounting body 1 having a sharpened tip in side view is pivotally supported on the lower sensor mounting member 60 provided at the tip of the cutting device 7 so that the rear part swings up and down on the horizontal axis 1a. The rear part of the sensor mounting body 1 is urged downward by a coil spring 1b. The swing angle of the sensor mounting body 1 is detected by a potentiometer type sensor 8 and converted to the ground height of the reaping device 7. The spring 1b is wound around the horizontal shaft 1a, one end thereof is brought into contact with the integral pin 60a on the sensor mounting member 60 side, and is locked on the other end sensor mounting body 1 side. The sensor mounting body 1 is constantly urged to the downward rotation side by the generated force. A pin 60b for restricting the downward rotation position of the sensor mounting body 1 is integrally provided from the sensor mounting member 60 side.

  The grounding body mounting tool 2 is sandwiched in a shape in which the rear part of the sensor mounting body 1 is cut out in a U-shape when viewed from the side, and the grounding body mounting tool 2 is pivotally supported by the vertical axis 4 so as to swing left and right. Then, a torsion spring 9 is attached around the longitudinal axis 4, and an integral pin 9 a is sandwiched between both ends of the torsion spring 9 on the sensor attachment body 1 side and an integral pin 9 b is sandwiched on the grounding body attachment tool 2 side. Thereby, it urges | biases so that the grounding body fixture 2 may be hold | maintained in the attitude | position which goes to a back side.

  A grounding body 3 made of a band iron curved in an arc shape is attached to the grounding body attachment 2 facing backward. The rear part of the grounding body 3 is wound upward and partly cut out toward the rear to form a bowl shape. By making it into a bowl shape, it becomes difficult to catch sawdust and the like. In addition, you may comprise the grounding body fixture 2 with a piano wire.

  When the grounding body 3 moves up and down due to the unevenness of the field scene, the rear part of the sensor mounting body 1 rotates up and down, and this is detected by the sensor 8 and can be converted into the ground height of the reaping device 7 by the microcomputer 30 described later. is there.

  When the aircraft is rotated backward or backward while the grounding body 3 is in contact with the field scene, an external force is applied to the grounding body 3 from the rear or diagonally behind. However, the grounding body 3 rotates around the vertical axis 4 to apply the external force. There will be no escape and damage.

  Further, by restricting the downward rotation position of the sensor mounting body 1 by the pin 60b, when the cutting device 7 is raised to the non-cutting work height, the sensor mounting body 1 and the grounding body 3 are excessively lowered. It is possible to prevent the grounding body 3 from plunging into the field scene when the mowing device 7 is lowered to the mowing work height.

In addition, the above-mentioned cutting height detection device may be attached to the weed pods 6 and 6 at both the left and right ends of the reaping device 7, or may be attached to the weed pod 6 at the middle portion in the left and right direction.
In another embodiment shown in FIG. 7, the sensor 8 is mounted at a high position on the weed ridge 6 where mud water hardly adheres, and the detection arm 8a of the sensor 8 and the sensor arm 1c of the sensor mounting body 1 are connected to the connecting rod 52 or the wire. And the movement of the sensor mounting body 1 is detected by the sensor 8.

Next, the raising / lowering control of the cutting device 7 will be described.
FIG. 8 is a control block diagram showing the flow of the lifting control signal of the reaping device. The signal input to the microcomputer 30 is an on / off signal from a fixed point stop switch 46 provided on a setting panel in the cabin 15, and the control lever 21. A signal for raising and lowering the cutting device 7 from the cutting, a setting signal from the cutting upper and lower limit setting switch 39, an allowable maximum position signal at the upper cutting limit sensor 48 and an allowable lowering signal from the lower cutting limit sensor 49, sensor 8, the height of the cutting device 7 with respect to the vehicle body 10 from the height sensor 34, the height of the cutting device 7 with respect to the vehicle body 10 from the left / right horizontal sensor 35, and the front / rear direction of the vehicle body 10 from the front / rear horizontal sensor 36. Inclination, ON / OFF signal from cutting height automatic switch 37, ON / OFF signal of threshing device 16 from threshing clutch switch 38, cutting upper / lower limit setting Upper and lower limits of the set values of the cutting apparatus 7 the switch 39, cutting device 7 detects a signal of the lower limit sensor 49 reaper upper limit sensor 48 reaper is inputted through the first input interface 31.

  Further, the extension position signal of the vehicle body left stroke sensor 42, the extension position signal of the vehicle body right stroke sensor 43, the extension position signal of the vehicle body front / rear stroke sensor 44, the distance detection signal of the ultrasonic sensor 45, and the engine speed of the engine rotation sensor 50 are as follows. , Input via the second input interface 32.

  A signal output from the microcomputer 30 is an operation signal to the cutting raising solenoid 40 and the cutting lowering solenoid 41 via the output interface 33, and the cutting lifting cylinder 25 is operated to raise and lower the cutting device 7.

  When the cutting height automatic switch 37 is turned ON, the cutting device 7 is lowered to the cutting height, the grounding body 3 is grounded, and the detection signal from the sensor 8 is input to the microcomputer 30, the detection by the sensor 8 is performed. The microcomputer 30 compares the value with a preset value (having a predetermined width (range)) preset on the microcomputer 30 side so that the detected value by the sensor 8 falls within the preset value on the microcomputer 30 side. An output is made to the mowing raising solenoid 40 or the mowing lowering solenoid 41, and the mowing raising / lowering cylinder 25 is expanded and contracted, and the mowing device 7 is adjusted up and down.

  In order to continue the mowing operation again when the mowing device 7 is lowered below the lowering limit, the fixed point stop switch 46 is turned off and the mowing device 7 is raised to the normal working position. Then, the operation of the control lever 47 causes the reaping device 7 to move up and down the vertical range set by the reaping upper / lower limit setting switch 39. In this way, if the fixed point stop switch 46 is turned on to prevent the mowing device 7 from being lowered too much, mud mowing due to an erroneous operation and damage to the mowing device 7 can be prevented.

  If the engine trouble is solved and the engine is restarted after the driving is stopped due to engine trouble and the cutting device 7 is grounded, the cutting device 7 attempts to return to the working range. However, if the fixed point stop switch 46 is turned on, The mowing device 7 is slightly raised up to the mowing lower limit and stopped, so that it is safe.

  The sensor 8 is attached to the right and left central weed ridge 6 so that the ground height detected by the sensor 8 and the horizontal height of the airframe detected by the left and right horizontal sensor 35 are used to calculate the ground height of the outermost right and left weed ridge 6. Then, the sensor 8 can be made into one. If the left and right horizontal sensor 35 is attached to the reaping device 7, the more accurate ground height of the right and left outermost weed pods 6 can be calculated.

  In addition, the inclination detected by the left / right horizontal sensor 35 and the front / rear horizontal sensor 36 is greater than a certain value, or the detection difference between the vehicle body left stroke sensor 42 and the vehicle body right stroke sensor 43 and the detection difference of the vehicle body front / rear stroke sensor 44 are greater than a predetermined value. If it is, it can be determined that the field is a wet field, which makes the control responsiveness sensitive. Moreover, if it can be determined that the field is a wet paddy field, it is possible to control more accurately by adopting the ground height detected by the ultrasonic sensor 45 for control.

DESCRIPTION OF SYMBOLS 1 Sensor attachment body 1a Horizontal axis 3 Grounding body 4 Vertical axis 8 Sensor

Claims (3)

  A grounding body (3) that supports the front part of the sensor mounting body (1) at the lower part of the cutting device so as to be pivotable up and down by a horizontal axis (1a) and contacts the farm scene at the rear part of the sensor mounting body (1). A sensor (8) for detecting the angle by which the sensor mounting body (1) is rotated up and down with respect to the reaping device by the grounding of the grounding body (3). A combine cutting height detecting device characterized by being provided.   The grounding body (3) is a belt-like body that is curved in an arc shape when viewed from the side, and a rear portion of the grounding body (3) is separated from a field scene. Combine harvester height detector.   The combined cutting height detecting device according to claim 2, wherein a rear portion of the grounding body (3) is cut into a hook shape.

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