JP2010279315A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester provided with a rake-in reel facilitating control of height of a reaping part and available at a low cost. <P>SOLUTION: The combine harvester is provided with a ground sensor 40 to detect grounding and attached to a bottom of the reaping part 4 for reaping culms and arranged at a front part of a machine body, a reaping height sensor 66 to detect the height of the reaping part 4 relative to the machine body, and a lifting cylinder to attach the reaping part 4 to the machine body in a vertically movable state, and is further provided with a controller 60 to control the height of the reaping part 4 relative to the machine body based on either one of the detection values by the ground sensor 40 and the reaping height sensor 66 according to the height of the reaping part 4 relative to the machine body, wherein the reaping part height is preset by a reaping height setting dial 52 to set the height of the reaping part 4 relative to the machine body. The controlling operation is facilitated by selectively using these two height sensors 40, 66 according to the height of the reaping part 4 relative to the machine body, and the number of parts for the height control of the reaping part 4 can be reduced compared with conventional harvesters. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a combine which is an agricultural grain harvesting machine.

The rake-type combine that is the subject of the present invention, when the machine is driven by a traveling device, rakes the cereals in the field with a scraping reel that rotates, cuts the cereals with a cutting blade, They are collected in the auger, supplied to the threshing chamber of the threshing device by the conveying device, and threshed.
At this time, the front / rear position and the vertical position of the scraping reel with respect to the cutting frame are adjusted in order to improve the working efficiency of the scraping reel according to the state of the grain straws in the field.

  In addition, a mounting shaft in the left-right direction is provided on the lower surface of the bottom plate of the cutting frame, and a front sensing plate is rotatably mounted on each of the mounting shafts, and the amount of rotation of the plate is detected on the left and right front sensing plates. Therefore, when the cutting part descends and the front sensing plate comes into contact with the field, it rotates around the mounting shaft, so that the cutting height sensor detects the height of the cutting part. The cutting height control is performed to make the height of the cutting portion constant by this signal.

  In addition, a rear sensor plate is pivotally mounted on the rear side of each front sensor plate, and a spring is provided between the front sensor plate and the rear sensor plate, and the spring moves the front sensor plate downward and rear sensor. Since the plate is energized so as to be lowered forward, the rear sensing plate prevents the farm scene or stock from coming into contact with the front sensing plate when the aircraft is moved backward, and only the rear sensing plate In other words, the front side sensing plate is pivoted upward about the mounting shaft and retracted.

JP 2001-78540 A

  In the invention described in Patent Document 1, since there are a plurality of sensors used for control to keep the height of the cutting part constant, in order to easily determine which sensor performs control, a separate switch or A dial was provided so that the operator could select and operate as necessary. However, in this case, since there are many operation tools, not only the operation is troublesome, but also the manufacturing cost is increased.

  An object of the present invention is to provide a combine equipped with a take-up reel that is inexpensive and easy to control the height of a cutting part.

The problems of the present invention are solved by the following means.
That is, the invention according to claim 1 detects the height of the ground between the cutting part (4) for cutting the cereals arranged on the front side of the machine body and the cutting part (4) provided at the bottom of the cutting part (4). In a combine provided with a grounding sensor (40), a cutting height sensor (66) for detecting the height of the cutting unit (4) with respect to the machine, and a lifting means for raising and lowering the cutting unit (4) with respect to the machine. A cutting height setting dial (52) for setting the height of the cutting part (4) with respect to the airframe, and grounding according to the height of the cutting part (4) with respect to the airframe set by the cutting height setting dial (52) A combine provided with a control device (60) for controlling the height of the cutting unit (4) relative to the airframe based on one of the detection values of the sensor (40) and the cutting height sensor (66). is there.

  According to the first aspect of the invention, the control operation is simplified by automatically using the two height sensors of the grounding sensor 40 and the cutting height sensor 66 according to the height of the cutting unit 4 with respect to the machine body. The number of parts required for the operation can be reduced as compared with the prior art, and the manufacturing cost can be reduced and provided at low cost.

The right view of the combine of one Example of this invention is shown. The right view of the moving mechanism of the take-in reel of the combine of FIG. 1 is shown. The top view of the moving mechanism of the take-in reel of the combine of FIG. 1 is shown. The side view of the sensing plate attachment part of the harvesting part of the combine of FIG. 1 is shown. The control block diagram of the harvesting part of the combine of FIG. 1 is shown. The flowchart of the vertical movement control of the harvesting part of the combine of FIG. 1 is shown. The flowchart of the trunnion position control of the combine of FIG. 1 is shown.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a right side view of a combine according to an embodiment of the present invention, FIG. 2 shows a side view of a take-up reel portion of the combine of FIG. 1, and FIG. 3 shows a take-up reel of the combine of FIG. FIG. 4 is a side view of a cutting ground sensor mounting portion of the combine cutting portion of FIG. 1. In this specification, the left and right directions are referred to as left and right, respectively, and the front and rear directions are referred to as front and rear, respectively.

  The combine is provided with a machine frame 1 and a traveling device 2 below the machine frame 1, a threshing device (not shown) is provided on the upper left side of the machine frame 1, and a cutting portion 4 is provided on the front side of the threshing device. After the grain harvested by the harvesting unit 4, conveyed to the threshing device and threshed by the threshing device is stored in the Glen tank 43, the grain in the Glen tank 43 is discharged from the auger 44 to the outside.

  The cutting unit 4 has a cutting frame 5 that is a rectangular frame in plan view and an upper portion that is integrally attached to the rectangular frame of the cutting frame 5, and a basket body 6 that is a part of the cutting frame 5 and a front side of the basket body 6. A supported weed body 7 is provided, a scraping reel 8 for scraping the cereals sown by the weed body 7 is provided, and a cutting blade 14 (FIG. 2) is provided below the stirring reel 8. On the rear side, an auger (not shown) for collecting the harvested grains is provided. The rear end of the cutting frame 5 is connected to the start end of the transport device 23, and the end of the transport device 23 is connected to a threshing chamber (not shown) of the threshing device.

  Further, the cutting unit 4 is provided with a cutting unit vertical cylinder (lifting / lowering driving means) between the cutting frame 5 or the conveying device 23 and the body frame 1, and the cutting unit 4 is configured to be vertically movable by extending and contracting the cylinder. Then, a cutting height sensor 66 (see FIG. 1) is provided at an appropriate position, and the height of the cutting unit 4 with respect to the machine body is detected by this sensor 66. That is, the cutting height sensor 66 is provided at the vertical rotation fulcrum portion of the cutting unit 4, and the cutting height sensor 66 detects the vertical rotation angle of the cutting unit 4 with respect to the body frame 1, whereby the body frame 1. The height of the cutting part 4 with respect to is detected.

  Further, a rotation center shaft (not shown) extending in the left-right direction is provided at the center portion of the take-up reel 8, and a pair of reel mounting members 9 are fixed to the left and right end portions of the rotation center shaft. The reel mounting member 9 is provided with a plurality of arm rods 10 projecting radially about the rotation center axis, and the tip portions of the adjacent arm rods 10 are connected to each other by reinforcing rods 11 to form a polygonal shape as a whole. Constitute. A base portion of the reel tine 12 is pivotally supported at the tip of each armband 10 so as to be rotatable. Reel mounting members 9 provided at the left and right ends of the lateral rotation center axis of the take-up reel 8 are rotatably supported by boss portions 13, respectively. The boss portions 13 are formed by a pair of left and right reel support arms (support members) 15. The reel support arm 15 is attached to the front side portion so as to be slidable in the longitudinal direction (the longitudinal direction of the machine body). The sliding of the boss portion 13 on the reel support arm 15 is performed by the rod 21 and the reel front / rear arm 20. That is, as shown in the plan view of FIG. 3, the base portion of the reel front / rear arm 20 that is rotated in the front / rear direction by the reel front / rear motor 18 is attached to the reel support arm 15 so as to be able to rotate back and forth. A rod 21 connects the upper end portion of the arm 20 and the boss portion 13.

The reel support arm 15 is pivotally supported by the cutting frame 5 so as to be movable up and down about the rotation shaft 15a, and the intermediate portion of the reel support arm 15 is supported by the cutting frame 5. Since it is supported at the tip of the attached reel vertical hydraulic cylinder 17, the vertical movement of the reel support arm 15 is performed by the reel vertical hydraulic cylinder 17, and the raising / lowering position of the take-up reel 8 is changed.
2 is a tip locus of the reel tine 12 when the take-up reel 8 is rotated.

  When the reel front / rear motor 18 is operated with the above configuration, the reel front / rear arm 20 rotates in the front / rear direction, and the boss 13 slides on the reel support arm 15 in the longitudinal direction via the rod 21, The front and rear positions of the take-in reel 8 are changed.

The above configuration has the following effects.
When the vehicle is driven by the traveling device 2, the cereals in the field are scraped by the reel tines 12 of the rotating scraping reel 8, and the roots of the cereal are sown by the weeding body 7. The culms harvested and harvested by the cutting blade 14 are collected by an auger (not shown), supplied to the threshing chamber of the threshing device by the transport device, and threshed.

  At this time, the reel front / rear motor 18 is operated to adjust the front / rear position of the scraping reel 8 with respect to the cutting frame 5 in order to improve the working efficiency of the scraping reel 8 depending on the state of the rice straw in the field. The rotation of the front / rear arm 20 is transmitted to the boss 13 via the rod 21 and the boss 13 is slid in the longitudinal direction on the reel support arm 15.

  Further, as shown in FIG. 4, a rotating shaft 31 in the left-right direction is provided on the lower surface of the bottom plate 6 a of the basket body 6 integral with the cutting frame 5, and the front sensing plate 32 is fixed to the rotating shaft 31 on the left and right. The rear end of the front sensing plate 32 and the front end of the rear sensing plate 33 are connected by an intermediate rotation shaft 34, and the front end of the rear detection plate 33 is rotated intermediately. A shaft 34 is pivotally mounted so as to be rotatable up and down. The front-side sensing plate 32 and the rear-side sensing plate 33 are made of a plate body having a rectangular shape in plan view having a width substantially equal to the cutting width, and are arranged so as to be respectively located on the left and right sides of the bottom plate 6a as shown in FIG.

  The front end of the spring 30 is locked to the front side sensing plate 32, and the rear end of the spring 30 is locked to the rear side sensing plate 33. Therefore, the rear end of the rear sensing plate 33 is supported in a state of being pressed against the basket body 6 integral with the cutting frame 5 by the spring 30, and the rear end of the rear sensing plate 33 is supported by the basket body 6. The bottom surface 6a is in slidable contact.

  The spring 30 is composed of a tension spring body, and the front sensing plate 32 is urged downward and the rear sensing plate 33 is energized so that the rear sensing plate 33 moves backward. It has a function to prevent entry into a farm scene and a function to prevent intrusion of mud into the upper surface side of the front sensing plate 32.

  As shown in FIG. 4, the arm 35 is fixed to the rotation shaft 31 protruding from the basket body 6 integral with the cutting frame 5 (FIG. 1), and the arm 35 is provided with an engagement pin 36. An engagement groove 37a formed on the bifurcated contact 37 is engaged, and the base of the contact 37 is rotatably attached to the basket body 6 side by a shaft 39, and the basket body 6 side is rotated through the rotation of the shaft 39. The contact height sensor (position sensor) detects the amount of rotation of the contact 37 (= the vertical rotation angle of the front sensing plate 32 pivotally supported by the cutting unit 4) and detects the height of the cutting unit 4 with respect to the field scene. 40 is configured.

  A pair of grounding height sensors 40 are provided on the left and right sides of the aircraft. That is, when the cutting unit 4 is lowered and the front side sensing plate 32 comes into contact with the field, the arm 35 rotates about the rotating shaft 31 around the rotating shaft 31. The engagement pin 36 provided at the position moves, and the contact 37 is rotated by the movement of the engagement pin 36, whereby the ground contact height of the cutting portion 4 can be detected.

  The arm 35 is engaged with the front end of a spring 41 that urges the front sensing plate 32 to the upward rotation side, the rear end of the spring 41 is engaged with an adjustment bolt 42, and the adjustment bolt 42 is located on the basket body 6 side. Screw onto the fixed part. Therefore, when the spring 41 is pulled by the adjusting bolt 42, the elasticity of the spring 41 becomes strong and the sensitivity of the contact height sensor 40 becomes dull. When the spring 41 is loosened, the sensitivity becomes sensitive.

  In the combine of this embodiment, as shown in the control block diagram of FIG. 5, the combine control controller 60 is connected to the following input side devices and output side devices. That is, the combine control controller 60 is configured so that the cutting / threshing clutch 51 for operating the cutting unit 4 and the threshing unit, and the cutting height setting dial 52 that can arbitrarily change the height of the cutting unit 4 and the height of the cutting unit 4 relative to the body frame 1. The body cutting height sensor 66 for detecting the height, the pair of left and right grounding sensors 40, 40 for detecting the cutting ground contact height, and the output side of the cutting portion 4 by adjusting the degree of expansion / contraction of a cutting lift hydraulic cylinder (not shown). A hydraulic valve that raises and lowers the height is connected.

FIG. 6 shows a flowchart of cutting height control by the cutting unit 4.
Here, depending on the value (target value) set with the cutting height setting dial 52, the grounding sensor 40 controls the cutting height or the anti-machine cutting height sensor (anti-machine sensor) 66 is switched. That is, the setting value by the cutting height setting dial 52 is an analog value in the range of zero v to 5 v, and an intermediate value of 2.5 v is an intermediate value of the cutting diamond value. Therefore, when the cutting height setting dial value is less than 2.5 V, control by the ground sensor 40 is performed as cutting low position control, and when it is 2.5 V or more, control by the to-machine cutting height sensor 66 is performed as cutting height position control. Switch.

  First, the reaping / threshing clutch 51 is actuated to start harvesting and threshing the cereal, and the detected value by the ground sensor 40 is equal to or lower than the lower limit value of the control range of the ground sensor 40, and the to-machine cutting height sensor If the detected value of the (machine sensor) 66 is smaller than the lower limit avoidance value of the machine sensor 66, the cutting unit 4 is quickly raised (step a). This is for raising the cutting unit 4 to an appropriate height as quickly as possible while preventing the cutting unit 4 from being pushed into the ground. Further, if the detection value by the ground sensor 40 is equal to or lower than the lower limit value of the control range of the ground sensor 40 and the detection value of the cutting height sensor 66 exceeds the lower limit avoidance value of the aircraft sensor 66, The mowing unit 4 is slowly raised to the standard height (step b).

  The ground sensor 40 detects a height exceeding the lower limit value of the control range of the ground sensor 40, and the value set by the cutting height setting dial 52 is used for switching between the cutting height position control and the cutting low position control. When the dial intermediate value set as the boundary value is exceeded (= control range of the aircraft sensor 66), the height control of the cutting unit 4 by the aircraft sensor 66 is performed, and the target height of the cutting unit 4 is determined by the dial position. (Step c), when the value detected by the aircraft sensor 66 exceeds the target height of the cutting unit 4, the cutting unit 4 is quickly lowered (step d), and the value detected by the aircraft sensor 66 is When the height is equal to or lower than the target height of the portion 4, the cutting portion 4 is quickly raised (step e).

  If the target value set with the cutting height setting dial 52 is equal to or less than the intermediate value, control is performed using the detection value of the ground sensor 40. When the detected value of the ground sensor 40 exceeds the upper limit value of the control range of the ground sensor 40, the cutting unit 4 is quickly lowered (step f), and the detected value of the ground sensor 40 becomes the upper limit value of the control range of the ground sensor 40. If less, the height of the cutting unit 4 is set with the cutting height setting dial 52 during the cutting low position control determination (step g). When the height of the cutting unit 4 is set by the cutting height setting dial 52, when the detected value of the ground sensor 40 exceeds the target value of the control range of the ground sensor 40, the cutting unit 4 is slowly lowered to the standard position. Set (step h). When the height of the cutting unit 4 set by the cutting height setting dial 52 is equal to or less than the target value of the control range of the ground sensor 40, the cutting unit 4 is slowly raised and set to the standard position (step i).

  Thus, when it is necessary to raise the cutting unit 4 with the value detected by the cutting height sensor 66 (step a, step e), the cutting unit 4 is quickly raised to prevent the cutting unit 4 from being pushed into the ground. The reason is that the mowing unit 4 is raised to an appropriate height as quickly as possible.

  In addition, when the vertical movement of the cutting unit 4 is performed based on the detection value of the aircraft sensor 66 as described above, there is no problem even if it is fast. However, when the cutting unit 4 is performed based on the detection value of the ground sensor 40, the cutting unit Since 4 easily touches the ground, it is possible to prevent damage to the cutting unit 4 by adjusting the height slowly.

  In the following embodiments, when a hydrostatic continuously variable transmission (hereinafter referred to as HST) dedicated to the mowing unit is provided in the mowing unit 4, a rotational speed sensor that detects the rotational speed of the mowing unit 4 and a trunnion shaft of the HST A position sensor is provided.

  With the above configuration, the rotational speed control is performed based on the rotational speed of the cutting unit 4, and if the detected value of the rotational speed sensor of the cutting unit 4 is abnormal, the operation of the cutting unit 4 is controlled based on the detected value of the trunnion shaft position sensor. When there is no change in the detected value of the rotational speed of the cutting unit 4 by the rotational speed sensor, the rotational speed of the cutting unit is determined to be abnormal and displayed on the monitor, and the operation control of the cutting unit 4 is controlled by the detected value of the trunnion shaft position sensor. Do.

Also, if there is no change in the detection value of the trunnion shaft position sensor, it is considered that there is an abnormality in the position control of the trunnion shaft. Operation control of the cutting unit 4 is performed based on the detection value of the rotation speed sensor. A flowchart of this control is shown in FIG.
Therefore, the operation can be continued even if the reaper rotation speed sensor breaks down.

  If there is a zoom auger 44 that expands and contracts the grain in the Glen tank 43, if the position does not change even if the contraction output of the zoom auger 44 is output for a certain period of time,判断 Judges that compression is in progress and issues an alarm. This is to prevent the helix from being damaged due to the compression of the scissors in the auger 44.

  If an abnormality is detected during the contraction output of the zoom auger 44, output is performed in a direction in which the auger 44 extends for a certain period of time, and after that, the auger spiral drive clutch is turned on to discharge the kite. .

  In addition, the position value of the auger 44 is stored at the time of the abnormality, the position stored value is compared with the current position at the next time the bag is discharged, and only when the auger 44 is on the extension side with respect to the stored value, The dredge is discharged by turning on the driving clutch of the auger spiral for discharging.

DESCRIPTION OF SYMBOLS 1 Airframe frame 2 Traveling device 4 Cutting part 5 Cutting frame 6 Basket body 6a Bottom plate 7 Weeding body 8 Scraping reel 9 Reel mounting member 10 Arm bar 11 Reinforcement bar 12 Reel tine 13 Boss part 14 Cutting blade 15 Reel support arm 15a Rotation Shaft 17 Reel vertical cylinder 17a Hydraulic valve 18 Reel front / rear motor 20 Reel front / rear arm 21 Rod 23 Transfer device 30 Spring 31 Rotating shaft 32 Front sensing plate 33 Rear sensing plate 34 Intermediate pivot shaft 35 Arm 36 Engaging pin 37 Contact 37a Engagement groove 39 Shaft 40 Grounding sensor (position sensor)
41 Adjustment regulating spring 42 Ground cutting height adjustment bolt 43 Glen tank 44 Grain auger 51 Cutting / threshing clutch 52 Cutting height setting dial 60 General purpose combine control controller 66 Cutting height sensor

Claims (1)

A harvesting part (4) for harvesting cereal grains arranged on the front side of the machine body, a grounding sensor (40) for detecting a ground height of the harvesting part (4) provided at the bottom of the harvesting part (4), and a harvesting part ( In the combine provided with the cutting height sensor (66) for detecting the height of the machine body of 4) and the lifting means for raising and lowering the cutting part (4) with respect to the machine body,
A cutting height setting dial (52) for setting the height of the cutting part (4) with respect to the airframe, and grounding according to the height of the cutting part (4) with respect to the airframe set by the cutting height setting dial (52) A control device (60) for controlling the height of the cutting unit (4) with respect to the machine body based on one of the detection values of the sensor (40) and the cutting height sensor (66).
Combine that is characterized by providing.

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