JP5973280B2 - General purpose combine - Google Patents

Description

  The present invention relates to a general-purpose combiner including a reel that is rotationally driven to scrape a crop, and more particularly to a detection device that detects the height (vertical position) and the front-rear direction position of the reel.

  In general, the general-purpose combiner includes a reel that rotates in the harvesting unit, and harvests the entire amount of cereal that has been scraped by the reel and transports it to the threshing unit. The reel is supported so as to be movable in the vertical direction and movable in the front-rear direction with respect to the cutting frame.

  The reel is provided movably in the front-rear direction at the tip of a reel support arm that is supported by the cutting frame so as to be swingable in the vertical direction. An elevating cylinder is disposed between the reel support arm and the cutting frame, and a reel boss portion supported by the reel support arm is moved in the front-rear direction by the advance / retreat cylinder.

  Accordingly, the height position of the reel is adjusted by the vertical movement of the reel support arm by the elevating cylinder, and the position in the front-rear direction is adjusted by the advance / retreat cylinder.

  Also, a potentiometer (reel height sensor) is provided near the pivot shaft of the reel support arm to detect the height position of the reel (see Patent Document 1). There has also been proposed a configuration in which a stroke sensor is arranged in parallel with the elevating cylinder and the height position of the reel is detected by the stroke sensor (see Patent Document 2).

  On the other hand, the rear end portion of the reel support arm with the reel attached to the tip is supported via the advance / retreat arm supported by the cutting frame, and the lifting cylinder is attached to the intermediate portion of the reel support arm, What was supported by what is called a four-point link mechanism is also proposed (refer patent document 3).

  In this apparatus, the reel is moved in the front-rear direction by swinging the advance / retreat arm by the advance / retreat cylinder, and the reel is moved in the vertical direction (elevation) by the elevating cylinder.

Japanese Patent No. 3670056 JP-A-6-105610 Japanese Patent No. 3995031

  In Patent Document 1, the rotation angle of the reel support arm is detected to detect the reel height, while in Patent Document 2, the stroke of the lifting cylinder is detected to detect the reel height. In both cases, the detected height position of the reel is greatly influenced by the position of the reel in the front-rear direction with respect to the reel support arm. In order to adjust the front / rear position of the reel and obtain the reel height with high accuracy, it is necessary to detect the front / rear position of the reel with respect to the reel support arm with a stroke sensor or the like. In addition, the rotation position of the reel support arm or the stroke position of the lifting cylinder and the front and rear positions of the reel mutually affect the height of the reel, so that troublesome control for correcting the detection value is required. .

  Further, when the potentiometer for detecting the rotation angle of the reel support arm of Patent Document 1 or the stroke sensor of Patent Document 2 is applied to the reel support arm by the four-point link mechanism shown in Patent Document 3, the potentiometer and the stroke sensor are It is difficult to detect the exact position of the reel and the position in the front-rear direction by affecting each other.

  Therefore, an object of the present invention is to provide a general-purpose combine that solves the above-described problems by arranging sensors so as not to affect each other in the vertical and forward / backward movements of the reel.

The present invention, the retractable arm between the reel reaper frame (4) reel support arms arranged (38) (8) to the front end, and the reaper frame the rear portion (81) (8,82) ( while supporting through 37), and supported by through the elevating cylinder (41) between its said intermediate portion (87) reaper frame (8,86),
As the elevating cylinder (41) expands and contracts, the reel support arm (38) is rotated around a pivot (81) with the advance / retreat arm (37), and the advance / retreat arm (37) is rotated by the advance / retreat cylinder (39). ) Around the pivot shaft (82) with the cutting frame (8) and the lifting cylinder (41) around the pivot shaft (86) with the cutting frame (8). The reel support arm (38) is moved in the front-rear direction by rotating,
In the general-purpose combine, wherein the reel (4) is moved in the vertical direction by the elevating cylinder (41), moved in the front-rear direction by the advance / retreat cylinder (39), and the reel is rotated to scrape the crop. ,
A vertical direction detection sensor (90, 91) for detecting a stroke of the elevating cylinder (41);
A front-rear direction detection sensor (103) for detecting a front-rear direction position of the reel support arm (38),
It is in the general-purpose combine characterized by this.

For example with reference to FIGS. 11 to 13, wherein the longitudinal direction detection sensor (103) is a potentiometer for detecting a rotational angle with respect to previous SL reaper frame (8) of the retractable arm (37).

  For example, referring to FIG. 11, FIG. 14 and FIG. 15, the vertical direction detection sensor includes a potentiometer (91), reel support arm (38) and potentiometer (91) arranged on the cutting frame (8a). And a wire (90) connecting the two.

  The reference numerals in the parentheses are for comparison with the drawings, but do not affect the structure of the claims.

  According to the present invention, when moving the reel up and down by swinging the reel support arm up and down by the lifting cylinder, the vertical position of the reel is detected by detecting the stroke of the lifting cylinder. Since the support arm swings in the vertical direction about the pivot shaft with the advance / retreat arm, the detection value of the front / rear direction detection sensor for detecting the front / rear direction position of the reel support arm is a constant value, and the reel is moved by the advance / retreat cylinder When the support arm is moved in the front-rear direction and the reel is moved in the front-rear direction, the front-rear position of the reel is detected by detecting the front-rear position of the reel by detecting the front-rear position of the reel support arm. The detected value is a constant value.

  Therefore, the vertical direction detection sensor and the front-rear direction detection sensor can detect the vertical position and the front-rear direction position of the reel without being affected by each other, and the control is simplified.

  If the forward / backward direction detection sensor is a potentiometer that detects the rotation angle of the advance / retreat arm with respect to the cutting frame, the forward / backward position of the reel can be reliably detected with a simple and inexpensive configuration without using an expensive stroke sensor. Can do.

  When the vertical direction detection sensor is composed of a potentiometer and a wire connecting the reel support arm and the potentiometer, the vertical position of the reel is reliably detected with a simple and inexpensive configuration without using an expensive stroke sensor. be able to.

It is a top view of the general purpose combine to which the present invention is applied. It is a left view of the general purpose combine which applied this invention. It is a right view of the general purpose combine to which the present invention is applied. It is a side view of the general purpose combine which shows the state which lowered the cutting part with respect to the traveling body and raised the reel with respect to the cutting part. It is a side view of the general purpose combine which shows the state which raised the cutting part with respect to the traveling body and lowered the reel with respect to the cutting part. It is a power transmission system diagram of this general purpose combine. It is a perspective view of a control part. It is a rear view of a multi steering lever. It is a left view which shows a cutting part. It is a right view which shows a cutting part. It is the perspective view seen from the right rear of a cutting part. It is a schematic side view which shows the vertical movement of a reel. It is a schematic side view which shows the front-back direction movement of a reel. It is a figure which shows the front-back direction detection sensor of a reel. It is a figure which shows the front-back direction detection sensor of the reel by other embodiment.

  1 to 3 are a plan view, a left side view, and a right side view of a general-purpose combine to which the present invention is applied. The general-purpose combine shown in the figure is for harvesting crops such as rice, wheat, and beans. The general-purpose combine includes a traveling machine body 2 having a pair of left and right crawler type traveling devices 1L and 1R, and a front of the traveling machine body 2. A reaping portion 3 that is connected to the reaping portion, a cylindrical reel 4 that extends in the left-right direction, and a movable mechanism 6 that supports the reel on the reaping portion 3 side so as to be movable in the vertical direction (up and down) and the front-rear direction. I have.

  The cutting unit 3 is integrally provided with a feeder 7 in the rear half and a cutting frame 8 in the front half, and a weeding body 9 projects forward from the left and right side walls of the cutting frame 8. A columnar scooping auger 11 extending in the left-right direction is supported on the lower part and the rear part between the left and right side walls of the left and right side walls so as to be rotatable about an axis. A cutting blade 12 is installed. Incidentally, the reel 4 is located between the left and right side walls of the plan view mowing frame 8.

  The feeder 7 includes a feeder conveyor 13 in the front-rear direction for conveying the harvested crop culm backward, and the feeder 7 is located on the side of the control unit 14 on the traveling machine body 2 side, which will be described later. In addition to being supported by the front part of the traveling machine body 2, the cutting frame 8 is formed in a left-right range extending from the front side of the control part 14 to the front side of the feeder 7.

  Between the cutting part 3 and the front part of the traveling machine body 2, a hydraulic lift cylinder (cutting part lifting actuator) 16 is provided that raises and lowers the cutting part 3 relative to the traveling machine body 2 by expansion and contraction. Yes. By operating the lift cylinder 16 to extend, the cutting unit 3 rises with respect to the traveling machine body 2, while by operating the lift cylinder 16 to reduce, the cutting unit 3 descends with respect to the traveling machine body 2.

  The reel 4 has a rotary shaft 17 that is driven to rotate about its own axis by power transmitted by means to be described later, and a polygonal shape (hexagonal shape in the illustrated example) in side view that rotates integrally with the rotary shaft 17. A pair of left and right side frames 18 and 18 are provided, and the vertex portions of the pair of left and right side frames 18 and 18 arranged in parallel and opposed to each other in a separated state are connected and fixed by horizontal frames 19 in the left and right direction, respectively. It is formed in a prismatic shape in which the periphery and both left and right sides communicate with each other inside and outside and the inside is a hollow. In addition, a plurality of reel tines 21 that protrude downward are arranged at predetermined intervals on each horizontal frame 19 arranged at predetermined intervals around the axis of the rotating shaft 17.

  The crop culm in the field that has been picked up by the rotating reel 4 is cut by the cutting blade 12 that is driven to slide back and forth in the left and right direction, and is picked up by the picking auger 11 to the feeder 7 side. The crop culm introduced on the feeder 7 side is conveyed rearward to the traveling machine body 2 side by the feeder conveyor 13.

  In the left half of the traveling machine body 2, a threshing unit 22 for performing threshing processing of cereals such as harvested rice and wheat and sorting grains such as cocoons from the processed product threshed is installed. A Glen tank 23 that stores grains from the threshing unit 22 is disposed in the right half of the traveling machine body 2, and the control unit 14 into which an operator gets is installed in front of the Glen tank 23.

  The threshing unit 22 includes a handling chamber 24 into which crop culm from the feeder conveyor 13 is introduced, and a sorting chamber 26 formed immediately below the handling chamber 24. An extending cylindrical handling cylinder 27 is rotatably supported around its own axis, and a swinging sorter 28 that moves back and forth is installed in the upper part of the sorting chamber 26. A tang fan 29 for raising the sorting air obliquely upward at the rear is arranged, and the first spiral 31 and the second spiral 32 are arranged in the front and rear in the middle in the front-rear direction in the lower part of the sorting chamber 26.

  The cereals introduced from the feeder 7 to the threshing unit 22 are threshed while being transported backward by the rotating barrel 27 in the handling chamber 24, and the processed product falls into the sorting chamber 26. The processed material that has fallen into the sorting chamber 26 is swayed and sorted by the swaying sorter 28 and sorted (wind-selected) by the sorting wind. Specifically, the first thing that falls on the first spiral 31 on the front side without being affected by the sorting wind, and the second thing that falls on the second spiral 32 on the rear side slightly affected by the sorting wind, Sorted into waste such as sawdust blown upward and rearward under the influence of the sorting wind. By the way, the first thing is conveyed as grain in the Glen tank 23, the second thing is reintroduced into the sorting chamber 26 and wind-selected, and the discharged matter is discharged from the rear end side of the traveling machine body 2 to the outside of the machine. The

  A chaff sheave 33 made up of a plurality of fins 33a arranged in parallel in the front-rear direction is installed in the latter half of the swing sorter 28. Then, during the opening operation in which the fins 33a are rotated downward by a fin opening / closing actuator composed of an electric motor or the like, the opening degree is increased, and the air volume of the selection air blown up above the swinging selection body 28. On the other hand, during the closing operation in which the fins 33a are rotated so as to face the horizontal direction by the fin opening / closing actuator, the opening degree becomes small, and the air volume of the selection air blown above the swinging selection body 28 Decrease. By adjusting the air volume by opening and closing the fins 33a as described above, it is possible to perform the optimum air selection according to the amount of processed material.

  The grain in the Glen tank 23 is discharged out of the machine by the discharge auger 36 supported at the rear end of the traveling machine body 2. Specifically, the base end portion of the discharge auger 36 is supported by the traveling machine body 2 so that the whole can swing up and down and can be horizontally rotated, and the discharge portion that discharges the grain at the tip portion of the discharge auger 36 36a is provided, and the grain can be discharged on the spot by moving the discharge portion 36a of the discharge auger 36 to a predetermined position by swinging up and down or horizontally.

  FIG. 4 is a side view of the general-purpose combiner showing a state in which the cutting unit 3 is lowered with respect to the traveling machine body and the reel 4 is raised with respect to the cutting unit, and FIG. And it is a side view of the general purpose combine which shows the state which lowered the reel with respect to the cutting part. This general purpose combine can also raise only the reel 4 to the highest position with respect to the cutting part 3 while the cutting part 3 is lowered to the lowest position with respect to the traveling machine body 2 (see FIG. 4). Furthermore, it is also possible to raise the cutting unit 3 to the highest position with respect to the traveling machine body 2 while the reel 4 is lowered to the lowest position with respect to the cutting unit 3 (see FIG. 5).

  FIG. 6 is a power transmission system diagram of the present general-purpose combiner. The power generated by the engine 42 is branched into the power of the traveling system and the power of the work system on the most upstream side of the transmission. The power of the traveling system is transmitted in the order of traveling HST43 → traveling transmission 44 to drive the left and right crawler traveling devices 1L, 1R to travel. On the other hand, the power of the work system is intermittently transmitted to the threshing portion 22 via the threshing clutch 46, and the power on the threshing portion 22 side is intermittently transmitted to the reaping portion 3 and the reel 4 via the reaping clutch 47.

  The traveling HST 43 performs forward / reverse switching of power from the engine 42 side and continuously variable transmission, and transmits the output power to the traveling transmission 44. The traveling transmission 44 has a function of transmitting the power from the traveling HST 43 to the left and right crawler type traveling devices 1L and 1R at a constant speed and a function of transmitting the power from the traveling HST 43 at different rotational speeds. The left side clutch 48L that intermittently transmits to the traveling device 1L and the right side clutch 48R that intermittently transmits the power from the traveling HST 43 to the right crawler traveling device 1R. For this reason, when one of the left and right side clutches 48L and 48R is disconnected and the other is connected, the traveling machine body 2 is turned to the disconnected side. Incidentally, if the left and right crawler type traveling devices 1L and 1R are driven at the same speed, the traveling machine body 2 travels straight.

  The power transmitted to the cutting unit 3 side is chain-transmitted to the feeder drive shaft 49 to convey and drive the feeder conveyor 13, and the power of the feeder drive shaft 49 is transmitted to the branch shaft 51. The power of the branch shaft 51 is transmitted to the take-up auger drive shaft 52 by a chain and drives the take-up auger 11 to be driven, and is also driven by the belt to the cutting blade drive shaft 53 to drive the cutting blade 12 by cutting.

  Further, the power of the branch shaft 51 is transmitted to the reel transmission device 54. The reel transmission 54 includes an input shaft 56 to which the power of the branch shaft 51 is transmitted in a chain, an input pulley 57 that rotates integrally with the input shaft 56, an output shaft 58, and an output pulley that rotates integrally with the output shaft 58. 59 and a V-belt 61 wound around an input pulley 57 and an output pulley 59. The power of the input shaft 56 is steplessly changed and transmitted to the output shaft 58 by the operation of the input pulley 57, the output pulley 59, and the V belt 61 via the reel speed change actuator. The power of the output shaft 58 is transmitted to the rotary shaft 17 to drive the reel 4 to rotate.

  That is, the reel transmission device 54 is configured to continuously change the rotation speed of the reel 4. Further, the reel transmission device 54 is housed in a transmission case 38 </ b> A that constitutes one of the left and right reel support arms 38 and 38.

  Next, the configuration of the control unit will be described with reference to FIGS. FIG. 7 is a perspective view of the control unit. The control unit 14 includes a seat 63 on which an operator is seated (see FIGS. 1 to 3), a shift lever 64 disposed on the side of the seat 63, a multi-steer lever 66 disposed in front of the seat 63, A switch panel 67 disposed behind the lever 64 and a cutting height setting dial 68 disposed in front of the transmission lever 64 and on the side of the multi-steering lever 66 are provided.

  The shift lever 64 can swing forward from the neutral position by swinging the traveling HST 43 in the neutral state from the front / rear neutral position to the left / right side, while moving from the neutral position to the left / right other side. By swinging, it is possible to swing backward from the neutral position. The speed increasing operation to the forward travel side through the traveling HST 43 is performed by swinging forward from the neutral position of the transmission lever 64, while the traveling HST 43 is performed by swinging backward from the neutral position of the transmission lever 64. The speed increasing operation to the reverse traveling side is performed.

  A grip 64a is formed at the upper end portion of the speed change lever 64, and a momentary type take-up switch (forced take-up operation means) 69 that can be pushed while gripping the grip 64a is formed at the side of the grip 64a. An alternate type lodging switch (overlay cutting operation means) 71 is provided on the back side of the grip 64a.

  The cutting height setting dial 68 is configured so that it can be pushed and operated. When the cutting height setting dial 68 is pressed, the cutting height automatic switch is turned on, and when the cutting height is set again, the cutting height is set. While the automatic switch is turned off, the elevation height (cutting height) of the cutting unit 3 during cutting is set by the dial operation of the cutting height setting dial 68.

  FIG. 8 is a rear view of the multi-steer lever. The multi-steer lever 66 swings up and down to manually move the cutting unit 3 through the lift cylinder 16 and also swings left and right to operate the vehicle body.

  Specifically, the multi-steer lever 66 is swung forward from the front-rear neutral position to perform the lowering operation of the cutting unit 3 for reducing the lift cylinder 16 to swing the multi-steer lever 66 rearward from the front-rear neutral position. As a result, the lifting operation of the cutting part 3 for extending the lift cylinder 16 is performed, while the multi-steering lever 66 is swung from the left / right neutral position to the left side, whereby the right side of the left / right crawler type traveling devices 1L, 1R is moved. The left side of the left and right crawler type travel devices 1L and 1R is moved to the right side by performing a left turn operation to drive the vehicle body to the left side by driving at high speed to the left side and swinging the multi-steer lever 66 from the neutral position to the right side. In response to this, a right turn operation is performed to drive the vehicle at a high speed and turn the vehicle body to the right.

  That is, the multi-steering lever 66 is a cutting unit lifting / lowering manual operation unit that moves the cutting unit 3 up and down with respect to the traveling machine body 2 and also a steering operation unit of the traveling machine body 2.

  In addition, a reel up / down manual operation means 74 is provided on one of the left and right sides of the upper end of the multi-steer lever 66, and a reel front / rear movement manual operation means 76 is provided on the left and right sides. A momentary trigger switch 73 is installed on the front side of the upper end.

  Specifically, as the reel raising / lowering manual operation means 74, a momentary reel raising switch 74 </ b> A that raises the reel 4 with respect to the cutting unit 3 and a momentary reel that lowers the reel 4 with respect to the cutting unit 3. A lowering switch 74B is provided above and below, and as a reel forward / reverse movement manual operation means 76, a momentary reel advance switch 76A for operating the reel 4 forward with respect to the reaper 3 and a reel 4 retracted relative to the reaper 3 A momentary reel retraction switch 76B to be operated is provided up and down.

  Next, the reel movable mechanism 6 in the cutting unit 3 which is a main part of the present invention will be described with reference to FIGS. 9 to 14. The movable mechanism 6 includes a pair of left and right reel support arms 38 and 38 that support the rotating shaft 17 of the reel 4 at the front end. The rear end portions of these reel support arms 38 are supported by the cutting frame 8 via advance / retreat arms 37, 37. That is, the upper end portion of the advance / retreat arm 37 is connected to the reel support arm 38 via the pivot shaft 81, and the lower end portion is connected to the cutting frame 8 via the pivot shaft 82. Specifically, as shown in detail in FIG. 11, the rear end portions of the left and right reel support arms 38, 38 are integrally connected by a connecting frame 83, and the advancing / retracting arm 37 is composed of left, right, and intermediate three pieces. The right and middle advance / retreat arms 37a and 37b are integrally connected by an intermediate shaft 84, and their upper ends are rotatably connected to the connection frame 83 via brackets, and the lower ends of the cutting frame 8 are The pivot shaft 82 is connected to the rear end via a bracket 85.

  Elevating cylinders (reel up / down moving actuators) 41 and 41 are respectively attached between the intermediate portions of the left and right reel support arms 38 and 38 and the cutting frame 8. The elevating cylinder 41 has a cylinder portion 41a on the fixed side connected to the cutting frame 8 via a pin 86, and a piston portion 41b on the movable side connected to the reel support arm 38 via a pin 87. . An advancing / retreating cylinder (reel back-and-forth movement actuator) 39 is attached between a connecting frame 83 that connects the rear ends of the left and right reel support arms 38 and the upper surface of the feeder 7. In addition, although the said raising / lowering cylinder 41 and the advance / retreat cylinder 39 consist of a hydraulic cylinder in this Embodiment, other linear motion actuators, such as an electric cylinder, may be sufficient. One end of the advance / retreat cylinder 39 is connected to the connection frame 83, but may be connected to the advance / retreat arm 37.

  Therefore, the reel support arm 38 constitutes a four-point link (four-bar link) mechanism that is supported by four pivot points 81, 82, 86, and 87, and as shown in FIG. By swinging in the vertical (up and down) direction around the pivot point 81 and extending and retracting the advance / retreat cylinder 39, it can move in the front-rear direction around the pivot points 82 and 86 as shown in FIG.

  As shown in FIGS. 10 and 11, the vertical movement of the reel support arm 38 is transmitted to the potentiometer 91 via the Bowden wire 90. One end portion of the outer wire 90 a of the Bowden wire 90 is attached to an outer receiver 92 provided on the cylinder portion 41 a that is the fixed side of the right elevating cylinder 41. One end of the inner wire 90 b of the wire 90 is attached by a pin 93 in the vicinity of the pivot shaft 87 in the reel support arm 38. The potentiometer 91 is disposed on the rear side surface of the back plate 8 a of the cutting frame 8. The back plate 8a closes the right side surface on the rear side of the cutting frame 8 in which the take-up auger 11 is stored with the axis line in the horizontal direction, and the feeder 7 is connected to the left rear side of the cutting frame 8. Yes.

  As shown in FIGS. 11 and 14, the potentiometer 91 is attached to the back plate 8a via a cross member 95. A sensor arm 96 is rotatably supported by a pivot pin 97 on the cross member 95. It is supported. The other end of the inner wire 90 b of the Bowden wire 90 is connected to one end of the sensor arm 96, and the other end of the sensor arm 96 is interlocked with the operating arm 91 a of the potentiometer 91 via a pin 99. Yes. The other end of the outer wire 90a of the Bowden wire 90 is attached to an outer receiver 100 provided at the edge 8c of the back plate 8a, and the sensor arm 96 resists the tensile force of the inner wire 90b. The spring 101 is stretched between the other side edge 8d of the back plate 8a. The potentiometer 91 constitutes a stroke sensor that detects the stroke of the elevating cylinder 41, and accordingly constitutes an up / down direction detection sensor that detects the vertical (up / down) position of the reel 4 due to the vertical swing of the reel support arm 38. . Note that the Bowden wire 90 may be connected to the potentiometer 91 by fixing the inner wire 90 b to a fixing member such as the back plate 8 a and connecting the outer wire 90 a to the sensor arm 96.

  A potentiometer 103 that detects the rotation angle of the rotary shaft 82 that rotates integrally with the forward / backward arm 37 is disposed on the pivot shaft (rotary shaft) 82 of the forward / backward arm 37 on the cutting frame 8 side. The potentiometer 103 constitutes a front-rear direction detection sensor that detects the front-rear direction position of the reel support arm 38.

  Accordingly, as shown in FIG. 12, when the lifting / lowering position of the reel 4 is adjusted by swinging the reel support arm 38 in the vertical direction around the pivot shaft 81 by the expansion / contraction of the lifting cylinder 41, The potentiometer 91 that detects the stroke detects the up / down (vertical direction) position of the reel 4. At this time, the advancing / retreating arm 37 is at a fixed position, and the detection value of the potentiometer 103 for detecting the rotation angle of the pivot shaft (rotating shaft) 82 is a fixed value.

  As shown in FIG. 13, by extending and retracting the advance / retreat cylinder 39, the reel support arm 38 is swung back and forth around the pivot shafts 82 and 86 on the cutting frame 8 side of the elevating cylinder 41 and the advance / retreat arm 37. Thus, when the front / rear position of the reel 4 is adjusted, the front / rear direction position of the reel 4 is detected by detecting the rotation angle of the pivot shaft (rotary shaft) 82 of the advance / retreat arm 37. At this time, the elevating cylinder 41 is at a certain length position, and the detected value of the potentiometer 91 as a stroke sensor is at a constant value.

  As shown in FIG. 15, the potentiometer 91 as the stroke sensor may be disposed laterally on a crosspiece member 95 that is attached laterally to the back plate 8a. The sensor arm 96 is attached by a pivot pin 97 so as to be movable in the vertical direction, and an inner wire 90b of a Bowden wire 90 suspended from the upper direction is connected to the tip of the sensor arm 96. The outer receiver 100 of the Bowden wire 90 is disposed on the upper portion of the back plate 8a. Accordingly, in the present embodiment, the sensor arm 96 is urged downward by gravity and opposes the inner wire 90b, so that the spring 101 shown in FIG. 14 is not necessary.

  The front-rear direction detection sensor is not limited to the potentiometer 103 that detects the rotation angle of the pivot shaft 82 on the cutting frame 8 side of the advancing / retreating arm 37, but the rotation angle of the lifting cylinder 41 with respect to the cutting frame 8 (the lifting cylinder) Other devices such as a device that detects the rotation angle of the pivot shaft 86 that rotates integrally with the motor 41 and a device that detects the stroke of the advance / retreat cylinder 39 may be used. The sensor for detecting the vertical position of the reel 4 by the stroke of the lifting cylinder is not limited to the one composed of the potentiometer 91 and the wire 90 described above, but is a stroke that is arranged in parallel with the lifting cylinder 41 and detects the stroke of the lifting cylinder. Others such as a sensor may be used.

  The potentiometer 91 disposed on the back plate 8a detects the stroke of the lift cylinder via the wire 90, and is less expensive than a stroke sensor that directly detects the stroke of the lift cylinder. Since it is arranged on the back plate 8a that does not interfere with the flow of the water, it can be detected without being affected by the crop.

  The adjustment of the reel 4 in the vertical direction (up / down) and the front / rear direction is performed by the ascending switch 74A and the descending switch 74B of the reel lifting / lowering manual operation means 74 and the forward switch 76A and the backward switch 76B of the reel forward / backward movement manual operation means 76. It is done by operation.

  Further, when the take-in switch 69 disposed on the upper end grip 64a of the shift lever 64 is turned on, forced take-in control is performed. In the forced scraping control, the reel rotation is set to a predetermined rotational speed (for example, maximum rotation) suitable for scraping, the reel is set to a predetermined rear position (for example, rearmost position) suitable for scraping, and The reel is set at a predetermined height position (for example, a lower limit position) suitable for scraping. Specifically, the reel 4 is a chain line position in FIG. When the take-in switch 69 is turned off to terminate the forced take-in control, the reel is returned to the state before the switch 69 is turned on.

  When the lodging switch 71 disposed on the transmission lever 64 is turned on, the lodging control is performed. In the lodging control, the reel rotation is set to a predetermined rotation speed (for example, the maximum rotation speed) suitable for harvesting material, the reel is set to a predetermined front position (for example, the frontmost position) suitable for lodging cutting, and the reel Is set to a predetermined height position (for example, a lower limit position) suitable for fall cutting. Specifically, the reel 4 is in a solid line position in FIG. When the lodging switch 71 is turned off and the lodging control is terminated, the reel is returned to the state before the switch is turned on.

DESCRIPTION OF SYMBOLS 3 Cutting part 4 Reel 6 Movable mechanism 8 Cutting frame 37 Advance / retreat arm 38 Reel support arm 39 Advance / retreat cylinder 41 Lift cylinder 90, 91 Vertical direction detection sensor (potentiometer, wire)
103 Longitudinal direction detection sensor (potentiometer)

Claims (3)

Frame reaper reel support arm to place the reel in a front end portion, while supported by the retractable arm between the frame reaper said its rear end, through the lifting cylinder between the frame reaper the its middle portion And support
The reel support arm is rotated about a pivot shaft with the advance / retreat arm by expansion / contraction of the elevating cylinder, and the advance / retreat arm is rotated about the pivot shaft with the cutting frame by the advance / retreat cylinder. , By moving the reel support arm in the front-rear direction by rotating the lifting cylinder around a pivot shaft with the cutting frame,
In the general-purpose combine that moves the reel up and down by the elevating cylinder, moves in the front-rear direction by the advance and retreat cylinder, and scrapes the crop by rotating the reel.
A vertical direction detection sensor for detecting a stroke of the lifting cylinder;
A front-rear direction detection sensor that detects a front-rear direction position of the reel support arm,
A general-purpose combine characterized by that. The front-rear direction detection sensor is a potentiometer that detects a rotation angle of the advance / retreat arm with respect to a front-rear cutting frame.
The general-purpose combine according to claim 1. The vertical direction detection sensor includes a potentiometer disposed on the cutting frame, and a wire connecting the reel support arm and the potentiometer.
The general-purpose combine according to claim 1 or 2.

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