JP5891144B2 - Combine - Google Patents

Description

  The present invention relates to a combine that can accurately detect the amount of discharged grain.

  When performing harvesting work in a field, a combine that performs harvesting and threshing of grains and recovery of grains is often used. The combine travels on the field with a crawler, and harvests the culm with a cutting blade during the travel, conveys the harvested culm to the handling cylinder, and threshes. Then, the chaff sheave and tang that are arranged below the barrel are used to sort the koji and grains separated from the koji, and the selected grains are collected in a grain tank via a screw conveyor (for example, Patent Documents). 1).

  The combine described in Patent Document 1 is provided with a loss sensor that detects the amount of grain discharged (loss amount) at a discharge port that discharges dust. Based on the detection result of the loss sensor, the angle of the chaff sheave and the air volume of the tang are adjusted to reduce the loss.

JP 2009-225686 A

  When the detection value of the loss sensor corresponds to the actual loss amount, the operation of the chaff sheave and the red pepper can be appropriately controlled. However, if the detection value of the loss sensor does not correspond to the actual loss amount, the airflow of the chaff sheave and the tang cannot be adjusted appropriately.

  For example, when the air volume of Tang Dynasty is excessive, the grain that has obtained kinetic energy from the wind from Tang Tang collides with the loss sensor vigorously, and the detection value of the loss sensor may detect a larger amount of loss than the actual amount of loss. is there.

  This invention is made | formed in view of such a situation, and it aims at providing the combine with which the actual loss amount and the detection value of a loss sensor respond | correspond.

  The combine according to the present invention selects a threshing device for threshing the harvested cereal, a storage unit for storing the threshed grain by the threshing device, and selecting the grain threshed by the threshing device. Based on the detection means, a discharge port for discharging the processed product after the sorting process by the sorting means, a detecting means for detecting the impact force of the grains contained in the processed product, the detection value of the detecting means, In the combine provided with a calculation means for calculating the amount of grain discharged from the discharge port, the calculation means has a correction means for correcting the grain amount according to the selection operation state of the selection means. .

  In the present invention, the grain amount obtained from the detection value of the detection unit is corrected according to the setting of the selection unit, and the actual loss amount and the detection value of the loss sensor are made to correspond to each other.

  The combine according to the present invention is characterized in that the selecting means includes tang and the correcting means corrects the grain amount according to the air volume of the tang.

  In the present invention, the grain amount obtained from the detection value of the detection means is corrected according to the air volume of the tang and the actual loss amount and the detection value of the loss sensor are made to correspond to each other.

  The combine according to the present invention is characterized in that the selecting means includes a chaff sheave, and the correcting means corrects the grain amount according to the angle of the chaff sheave.

  In the present invention, the grain amount obtained from the detection value of the detection means is corrected according to the angle of the chaff sheave, and the actual loss amount and the detection value of the loss sensor are made to correspond.

  In the combine according to the present invention, the grain amount obtained from the detection value of the detection unit is corrected according to the setting of the selection unit, and the actual loss amount and the detection value of the loss sensor are made to correspond to each other with high accuracy. The amount can be calculated and the operation of the sorting means can be controlled appropriately.

It is an external appearance perspective view of a combine. It is side surface sectional drawing which outlines the internal structure of a threshing apparatus. It is a transmission mechanism figure which shows the transmission path of the driving force of an engine schematically. It is a side view which shows the principal part structure of a chaff sheave and a shutter. It is a block diagram which shows the structure around the controller which controls threshing work. It is the conceptual diagram which shows an example of the function which is memorize | stored in the memory | storage part and shows the relationship between the loss amount and the detection value of a loss sensor. It is explanatory drawing explaining the relationship between the rotation speed of a red pepper, and the detected value of a loss sensor. It is explanatory drawing explaining the relationship between the fin angle r and the detection value of a loss sensor.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating a combine according to an embodiment.

  Hereinafter, the present invention will be described in detail based on the drawings showing the combine according to the first embodiment. FIG. 1 is an external perspective view of a combine.

  In the figure, reference numeral 1 denotes a traveling crawler, and an airframe 9 is provided above the traveling crawler 1. A threshing device 2 is provided on the body 9. On the front side of the threshing device 2, there is provided a cutting unit 3 including a weed plate 3a for discriminating between a harvested corn straw and a non-harvested corn straw, a cutting blade 3b for harvesting the corn straw, and a raising device 3c for causing the corn straw. It is. On the right side of the threshing device 2 is provided a grain tank 4 for storing the grain, and on the left part of the threshing device 2 is provided a long feed chain 5 before and after conveying cereals. On the upper side of the feed chain 5, there is provided a clamping member 6 for clamping the cereal cake, and the clamping member 6 and the feed chain 5 face each other. In the vicinity of the front end portion of the feed chain 5, an upper transport device 7 is disposed. The grain tank 4 is provided with a cylindrical discharge auger 4 a for discharging the grain from the grain tank 4, and a cabin 8 is provided on the front side of the grain tank 4.

  The vehicle body 9 travels by driving the travel crawler 1. As the machine body 9 travels, the cereals are taken into the mowing unit 3 and mowed. The harvested corn straw is conveyed to the threshing device 2 through the upper conveying device 7, the feed chain 5 and the clamping member 6, and threshed in the threshing device 2.

  FIG. 2 is a side sectional view schematically showing the internal configuration of the threshing apparatus 2. As shown in FIG. 2, a handling room 10 for threshing cereals is provided at the front upper part of the threshing device 2. A cylindrical handling cylinder 11 whose axial direction is the longitudinal direction is mounted in the handling chamber 10, and the handling cylinder 11 is rotatable about the axis. A large number of teeth 12, 12,... 12 are arranged in a spiral on the peripheral surface of the barrel 11. On the lower side of the handling cylinder 11, a crimp net 15 is disposed for coping with the handling teeth 12, 12,. The said handling cylinder 11 rotates with the driving force of the engine 40 mentioned later, and threshs a cereal.

  Four dust feed valves 10 a, 10 a, 10 a, 10 a are arranged in parallel in the front-rear direction on the upper wall of the handling chamber 10, and the dust feed valve 10 a is an amount of straw and grains to be sent to the rear part of the handling chamber 10. Adjust.

  A processing chamber 13 is connected to the rear of the handling chamber 10. A cylindrical processing cylinder 13b whose axial direction is the longitudinal direction is mounted in the processing chamber 13, and the processing cylinder 13b is rotatable around the axis. A large number of teeth 13c, 13c,..., 13c are arranged in a spiral on the peripheral surface of the processing cylinder 13b. A treatment net 13d that disperses the ridges in cooperation with the teeth 13c, 13c,..., 13c is disposed below the treatment cylinder 13b. The processing cylinder 13b is rotated by the driving force of the engine 40, and performs a process of separating the grain from the straw and the grain delivered from the handling chamber 10. A discharge port 13 e is opened below the rear end of the processing chamber 13.

  Four processing cylinder valves 13 a, 13 a, 13 a, 13 a are juxtaposed along the front-rear direction on the upper wall of the processing chamber 13, and the processing cylinder valves 13 a, 13 a, 13 a, 13 a go to the rear part of the processing chamber 13. Adjust the amount of straw and grains to be delivered.

  Below the crimp net 15 is provided a swinging sorter 16 for sorting grains and straws. The rocking sorter 16 is provided on the back side of the rocking sorter 17 for making the grains and straws uniform and selecting the specific gravity, and for rough sorting of the grains and straws. A chaff sheave 18 to be performed, and a stroller rack 19 provided on the rear side of the chaff sheave 18 for dropping the grains mixed in the straw. The Strollac 19 has a plurality of through holes (not shown). A swing arm 21 is connected to the front portion of the swing sorter 17. The swing arm 21 is configured to swing back and forth. By the swinging of the swinging arm 21, the swing sorting device 16 swings, and selection of straw and grains is performed.

  The swing sorting device 16 is provided below the chaff sheave 18 and further includes a grain sheave 20 that performs fine sorting of grains and straw. Below the grain sheave 20, a first grain plate 22 inclined with the front facing down is provided, and on the front side of the first grain plate 22, a first screw conveyor 23 is provided.

  The first screw conveyor 23 takes in the grain that has slid down the first grain plate 22 and feeds it to the grain tank 4. A spout 4 b is provided on the side surface of the grain tank 4, and the grain is put into the grain tank 4 from the spout 4 b.

  At the rear of the first grain plate 22, an inclined plate 24 inclined downward is provided continuously. A second grain plate 25 inclined downward toward the front is connected to the rear end of the inclined plate 24. A second screw conveyor 26 is provided on the upper side of the connecting portion between the second grain plate 25 and the inclined plate 24 to convey straw and grains.

  Falling objects that have fallen onto the inclined plate 24 or the second grain plate 25 from the through holes of the Strollac 19 slide down toward the second screw conveyor 26. The fallen fallen object is conveyed to the processing rotor 14 provided on the left side of the handling cylinder 11 by the second screw conveyor 26 and is threshed by the processing rotor 14.

  A tang 27 that performs a wind-up operation is provided in front of the first screw conveyor 23 and below the swing sorter 17. The wind generated by the wind-up operation of the carp 27 travels backward. A rectifying plate 28 for sending the wind upward is disposed between the tang 27 and the first screw conveyor 23.

  A passage plate 36 is connected to the rear end portion of the second grain plate 25. A lower suction cover 30 is provided above the passage plate 36. A space between the lower suction cover 30 and the passage plate 36 is a discharge passage 37 through which dust is discharged.

  An upper suction cover 31 is provided above the lower suction cover 30. Between the upper suction cover 31 and the lower suction cover 30, an axial fan 32 for sucking and discharging soot is disposed. A dust exhaust port 33 is provided behind the axial flow fan 32. The air flow generated by the operation of the tang 27 is rectified by the rectifying plate 28, then passes through the swing sorting device 16 and reaches the dust outlet 33 and the discharge passage 37. The grain is discharged from the dust outlet 33 and the discharge passage 37.

  On the upper side of the upper suction cover 31, below the processing chamber 13, there is provided a sluice 35 that is inclined with the front facing downward. Exhaust discharged from the discharge port 13e of the processing chamber 13 slides down the downflow basin 35 and falls onto the Strollac 19.

  A loss sensor 34 for detecting the amount of discharged grain is provided between the discharge passage 37 and the Strollac 19. The grains that have passed over the Strollac 19 collide with the loss sensor 34. The loss sensor 34 includes a piezoelectric element, and a voltage signal is output from the loss sensor 34 due to the collision of the grains, and the amount of grain discharged from the dust outlet 33 and the discharge passage 37 is detected.

  The driving of the traveling crawler 1, the cutting operation of the cutting unit 3, the rotation of the handling cylinder 11, the rotation of the processing cylinder 13 b, the swinging of the swing sorting device 16, the rotating operation of the first screw conveyor 23, etc. The driving force is used. FIG. 3 is a transmission mechanism diagram schematically showing the transmission path of the driving force of the engine 40.

  The driving of the traveling crawler 1, the cutting operation of the cutting unit 3, the rotation of the handling cylinder 11, the rotation of the processing cylinder 13 b, the swinging of the swing sorting device 16, the rotating operation of the first screw conveyor 23, etc. The driving force is used. FIG. 3 is a transmission mechanism diagram schematically showing the transmission path of the driving force of the engine 40.

  As shown in FIG. 3, the engine 40 is connected to a traveling mission 42 via an HST (Hydro Static Transmission) 41.

  The HST 41 includes a hydraulic pump (not shown), a mechanism (not shown) for adjusting the flow rate of hydraulic oil supplied to the hydraulic pump and the pressure of the hydraulic pump, and a transmission circuit (not shown) for controlling the mechanism. And have. The traveling mission 42 has a gear (not shown) that transmits driving force to the traveling crawler 1.

  The engine 40 is connected to the handling cylinder 11 and the processing cylinder 13b through an electromagnetic threshing clutch 44.

  The engine 40 is connected to the handling cylinder 11 and the processing cylinder 13b through a threshing clutch 44, and is also connected to an eccentric crank 45. The eccentric crank 45 is connected to the swing arm 21, and the swing sorting device 16 swings when the eccentric crank 45 is driven.

  Further, the engine 40 is connected to the tang 27 through a threshing clutch 44, and further connected to a cutter 46 for cutting the waste after threshing. A tang rotation speed detection sensor 27 a for detecting the rotation speed of the tang 27 is provided in the vicinity of the tang 27.

  The red pepper rotation speed detection sensor 27 a is a magnetic sensor including, for example, a Hall element or an MR element, and detects the rotation speed of the transmission shaft that transmits power to the red pepper 27. The rotation speed of the transmission shaft corresponds to the rotation speed of the tang 27.

  The engine 40 is connected to the cutting unit 3 through a threshing clutch 44 and a cutting clutch 47. The driving force of the engine 40 is transmitted to the traveling crawler 1 via the traveling mission 42, and the aircraft travels. Further, the driving force of the engine 40 is transmitted to the cutting unit 3 via the cutting clutch 47, and the cereal is harvested by the cutting unit 3.

  The driving force of the engine 40 is transmitted to the handling cylinder 11 via the threshing clutch 44, and the cereal is threshed by the handling cylinder 11. Further, the driving force of the engine 40 is transmitted to the processing cylinder 13b via the threshing clutch 44. The processing cylinder 13b separates the grain from the processed product threshed by the handling cylinder 11.

  Further, the driving force of the engine 40 is transmitted to the swing sorting device 16 via the threshing clutch 44 and the eccentric crank 45 and is discharged from the straw and grains leaked from the handling cylinder 11 and the discharge port 13e of the processing chamber 13. Selection of potatoes and kernels.

  Further, the driving force of the engine 40 is transmitted to the tang 27 through the threshing clutch 44, and the culm sorted by the swing sorting device 16 is discharged from the dust outlet 33 and the discharge passage 37 by the wake action of the tang 27. .

  Next, the structure of the chaff sheave 18 and the tang 27 will be described. FIG. 4 is a side view showing the main configuration of the chaff sheave and shutter.

  A waste wall chain 50 is provided in the vicinity of the handling cylinder 11 for conveying the waste threshed by the handling cylinder 11 toward the cutter 46. An exhaust wall guide rod 51 is provided so as to face the exhaust wall chain 50, and the waste water moves between the exhaust wall guide rod 51 and the exhaust wall chain 50 together with the movement of the exhaust wall chain 50.

  As shown in FIG. 4, an L-shaped turning lever 52 is provided on the lower side of the waste wall guide rod 51, and the turning lever 52 extends from the front and rear shafts 52a which are long in the front-rear direction and from the front end portion of the front and rear shafts 52a. And an upper and lower shaft 52b protruding upward. A pivot 52c is provided at the corner between the vertical shaft 52b and the front / rear shaft 52a.

  The waste wall guide rod 51 and the rear end portion of the front / rear shaft 52 a are connected via a connecting rod 53, and a spring body 54 is fixed around the connecting rod 53. As the waste moving between the waste wall guide rod 51 and the waste wall chain 50 increases, the waste wall guide rod 51 is pressed and moved downward, and the turning lever 52 is pivoted on the pivot 52c. It rotates backward (see the solid line arrow in FIG. 4).

  At this time, the spring body 54 is compressed. On the other hand, as the squeezing is reduced, the squeezing guide rod 51 moves upward due to the restoring force of the compressed spring body 54, and the pivot lever 52 pivots forward with the pivot 52c as a fulcrum (broken arrow in FIG. 4). reference).

  Next, the configuration of the chaff sheave 18 will be described. The chaff sheave 18 has a frame (not shown) framed in a rectangular shape. A plurality of fins 18a, 18a,..., 18a extending in the left-right direction are arranged in parallel in the front-rear direction between the left and right frame members extending in the front-rear direction.

  The upper portions of the fins 18a, 18a, ..., 18a are pivotally supported by a frame member, and the lower portions of the fins 18a, 18a, ..., 18a are pivoted by a single connecting rod 18b extending in the front-rear direction. It is supported. A midway portion of a rectangular rotating plate 18c is connected to the front portion of the connecting rod 18b, and one end of the rotating plate 18c is pivoted around the shaft 18i above the connecting rod 18b. It is supported. One end of a chaff wire 18e is connected to the other end of the rotating plate 18c, and the other end of the chaff wire 18e is connected to the vertical shaft 52b.

  The shaft body 18i is provided with a potentiometer type fin sensor 18j for detecting the position of the rotating plate 18c. Based on the output of the fin sensor 18j, a fin angle (an angle formed between the fins 18a, 18a, ..., 18a and the connecting rod 18b) r is detected.

  One end of an L-shaped manual plate 18h operated by a manual lever (not shown) is connected to the shaft 18i. The other end portion of the manual plate 18h is connected to the middle portion of the chaff wire 18e and one end portion of the manual wire 18g. The other end of the manual wire 18g is connected to the manual lever.

  The manual plate 18h and the rotary plate 18c are connected to one end of the rotary plate 18c and the other end of the manual plate 18h via a spring body 18d. One end of a spring body 18f is connected to the middle portion of the manual plate 18h, and the other end of the spring body 18f is fixed at an appropriate position of the threshing device 2.

  When the pivot lever 52 pivots backward, the chaff wire 18e is pulled, the pivot plate 18c pivots counterclockwise, and the connecting rod 18b moves rearward. The fins 18a, 18a,..., 18a stand up to increase the fin angle r, and the intervals between the fins 18a, 18a,.

  At this time, the spring body 18f is compressed (see the solid line arrow in FIG. 4). On the other hand, when the turning lever 52 is turned forward, the turning plate 18c is turned clockwise by the restoring force of the spring body 18f, the connecting rod 18b is moved forward, the fins 18a, 18a tilts and the fin angle r becomes small, and the interval between the fins 18a, 18a,..., 18a becomes narrow (see the broken line arrows in FIG. 4).

  Further, by operating the manual lever, the manual wire 18g can be pulled or loosened to rotate the manual plate 18h and the rotating plate 18c, thereby adjusting the interval between the fins 18a, 18a,. It is like that. The manual lever can be fixed at an appropriate position.

  Next, the configuration near the air inlet 55 of the tang 27 will be described. A rectangular air inlet 55 through which air sucked into the carp 27 flows is provided on one side of the carp 27. A rectangular fixed plate 56 that is long in the front-rear direction and covers a part of the intake port 55 is provided at the center of the intake port 55, and a rectangular plate-shaped shutter 57 is adjacent to the upper side of the fixed plate 56. ing.

  One end of the shutter 57 is pivotally supported by the threshing device 2. When the shutter 57 is rotated upward, the shutter 57 is separated from the fixed plate 56 and the opening area of the intake port 55 is enlarged, and when the shutter 57 is rotated downward, the shutter 57 Approaches the fixed plate 56 and the opening area of the intake port 55 is reduced.

  An upper end portion of a tension spring 58 is connected to the front end portion of the shutter 57, and the lower end portion of the tension spring 58 is locked in place on the threshing device 2. A shaft body 59 projects forward from the front end portion of the shutter 57, and one end portion of the shutter wire 60 is connected to the projecting end portion of the shaft body 59. The other end of the shutter wire 60 is connected to the vertical shaft 52b.

  When the rotation lever 52 is rotated backward, the shutter wire 60 is pulled, the shutter 57 is rotated upward, the opening area of the intake port 55 is enlarged, and the tension spring 58 is extended. (See solid line arrow in FIG. 4). On the other hand, when the rotating lever 52 is rotated forward, the restoring force of the tension spring 58 causes the shutter 57 to rotate downward to reduce the opening area of the intake port 55 (broken arrow in FIG. 4). reference).

  A servo motor 70 is disposed below the rotating lever 52. The servo motor 70 is provided with an electromagnetic brake (not shown) that brakes the rotation shaft of the servo motor 70. The electromagnetic brake is released simultaneously with the start of rotation of the servo motor 70, and the electromagnetic brake is activated simultaneously with the end of rotation.

  The rotating shaft of the servo motor 70 is connected to one of the electromagnetic motor clutch 71 via a reduction gear box (not shown). The other of the motor clutch 71 is connected to the pivot 52c. The servo motor 70 is connected to a motor drive circuit 91 described later, and the motor clutch 71 is connected to a motor clutch drive circuit 92 described later.

  When the motor clutch 71 is engaged and the rotation lever 52 is rotated rearward by the rotation of the servo motor 70, the exhaust wall guide rod 51 moves downward and the spring body 54 is compressed. (See solid line arrow in FIG. 4). When the motor clutch 71 is disengaged, due to the restoring force of the spring body 54, the exhaust wall guide rod 51 moves upward and the pivot lever 52 pivots forward (see the broken line arrow in FIG. 4). .

  FIG. 5 is a block diagram showing a configuration around a controller that controls the threshing operation. The combine includes a controller 90 that controls the threshing operation, and the controller 90 has a plurality of functions A, B, and C (FIG. 6 to be described later) that indicate the relationship between the detected value of the CPU 90a and the red pepper rotation speed detection sensor 27a and the loss amount. A storage unit 90b that stores information), a RAM 90c that temporarily stores information, an input interface 90d, and an output interface 90e.

  The detection values of the fin sensor 18j, the red pepper speed detection sensor 27a, and the loss sensor 34 are input to the input interface 90d. Further, a signal is output from the output interface 90 e to a motor driving circuit 91 that outputs a driving signal to the servo motor 70 and a motor clutch driving circuit 92 that outputs a driving signal to the motor clutch 71.

  The controller 90 outputs drive signals to the motor drive circuit 91 and the motor clutch drive circuit 92 based on the detection values input from the fin sensor 18j, the rotary speed detection sensor 27a, and the loss sensor 34, and the fins 18a and the shutter 57 are controlled. Controls opening and closing. The controller 90 may control the direction of the dust delivery valve 10a by controlling the drive of a motor (not shown) that supplies power to the dust delivery valve 10a.

  FIG. 6 is a conceptual diagram illustrating an example of a function stored in the storage unit 90b and indicating the relationship between the loss amount and the detection value of the loss sensor 34. The storage unit 90b stores three functions A, B, and C that indicate a linear relationship between the detection value of the loss sensor 34 and the loss amount.

  The slopes of functions A, B, and C (ratio of increase / decrease amount of loss to increase / decrease amount of detection value) are different from each other. The slope of function B is greater than function A, and the slope of function C is greater than function B. The controller 90 sets one of the functions A, B, and C according to the magnitude of the rotational speed detected by the red pepper rotational speed detection sensor 27a.

  The functions A, B, and C correspond to the rotational speeds a, b, and c of the carp 27 (where a> b> c). The controller 90 sets the function A when the detection value of the red pepper rotation speed detection sensor 27a indicates the rotation speed a or higher, and sets the function A when the detection value of the red pepper rotation speed detection sensor 27a indicates the rotation speed c or higher and lower than the rotation speed a. When the function B is set and the detection value of the red pepper rotation speed detection sensor 27a indicates less than the rotation speed c, the function C is set.

  Next, the relationship between the rotation speed of the red pepper 27 and the detection value of the loss sensor 34 will be described. FIG. 7 is an explanatory diagram for explaining the relationship between the rotation speed of the carp 27 and the detection value of the loss sensor 34. FIG. 7A is an explanatory diagram for explaining the state in the threshing apparatus 2 when the rotation speed of the tang 27 is small, and FIG. 7B is an explanatory view for explaining the state in the threshing apparatus 2 when the rotation speed of the tang 27 is large.

  As shown in FIG. 7A, when the rotation speed of the tangs 27 is small, the air volume of the tangs 27 is small, and the kinetic energy given to the grains by the winds of the tangs 27 is small. For this reason, when the grain moved backward by the wind of the red pepper 27 collides with the loss sensor 34, the detection value detected by the loss sensor 34 is small.

  As shown in FIG. 7B, when the rotation speed of the tang 27 is large, the air volume of the tang 27 is large, and the kinetic energy given to the grain by the wind of the tang 27 is large. For this reason, when the grain moved backward by the wind of the red pepper 27 collides with the loss sensor 34, the detection value detected by the loss sensor 34 is large.

  That is, even if the same amount of grain collides with the loss sensor 34, the detection value detected by the loss sensor 34 differs depending on the rotation speed of the tang 27. Therefore, a plurality of functions A to C whose magnitudes are increased or decreased are stored in advance in the storage unit 90b in accordance with the magnitude of the rotation speed detected by the red pepper rotation speed detection sensor 27a. Set the function according to the detected value.

  The controller 90 calculates the loss amount by applying the detection value of the loss sensor 34 to the set function. Based on the calculated loss amount, a drive signal is output to the motor drive circuit 91 and the motor clutch drive circuit 92 to control the opening and closing of the fin 18a and the shutter 57.

  The controller 90 may set one of the functions A to C according to the magnitude of the detection value (fin angle r) of the fin sensor 18j. FIG. 8 is an explanatory diagram for explaining the relationship between the fin angle r and the detection value of the loss sensor 34. FIG. 8A is an explanatory diagram for explaining a state in the threshing device 2 when the fin angle r is small, and FIG. 8B is an explanatory diagram for explaining a state in the threshing device 2 when the fin angle r is large.

  Since the wind from the tang 27 blows up along the fin 18a, the wind direction depends on the fin angle r. As shown in FIG. 8A, when the fin angle r is small, the upward angle of the wind direction is small, and the wind draws an arc trajectory having a large radius of curvature. As a result, most of the kernels on the wind pass through the loss sensor 34 to the discharge passage 37, and a small amount of kernels collide with the loss sensor 34.

  As shown in FIG. 8B, when the fin angle r is large, the upward angle of the wind direction is large, and the wind draws an arc trajectory having a small curvature radius. As a result, most of the grains on the wind collide with the loss sensor 34 without exceeding the loss sensor 34.

  That is, even if the amount of discharged grain is the same, the amount of kernel that collides with the loss sensor 34 differs depending on the size of the fin angle r. Therefore, according to the magnitude of the fin angle r detected by the fin sensor 18j, a plurality of functions A to C whose magnitude is large are stored in the storage unit 90b in advance, and the controller 90 corresponds to the detection value of the fin sensor 18j. Set the function.

  The controller 90 may set a function according to the detection value of the fin sensor 18j and the detection value of the red-tooth rotation speed detection sensor 27a. For example, the detection value of the fin sensor 18j and the detection value of the rotary speed detection sensor 27a are respectively weighted, and a function is set according to the magnitude of the value obtained by adding, subtracting, multiplying or dividing both values. Alternatively, both values may be calculated by applying them to a relational expression set in advance, and a function may be set according to the magnitude of the calculation result.

  Note that a switch for manually setting the rotation angle of the fin angle r or the tongue 27 may be provided in the cabin 8 and the controller 90 may set a function in accordance with an input value from the switch.

  In the combine according to the embodiment, the grain amount obtained from the detection value of the loss sensor 34 is corrected according to the setting of the chaff sheave 18 or the tang 27, and the actual loss amount and the detection value of the loss sensor 34 are made to correspond to each other. Thus, the loss amount can be calculated with high accuracy, and the operation of the chaff sheave 18 or the tang 27 can be appropriately controlled.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is intended to include all modifications within the scope of the claims and the scope equivalent to the scope of the claims.

2 Threshing device 4 Grain tank (storage part)
18 Chaff sheave 18j Fin sensor 27 Kara 27a Kara rotational speed detection sensor 34 Loss sensor (detection means)
37 Discharge passage (discharge port)
90 controller (calculation means, correction means)

Claims (3)

A threshing device for threshing the harvested cereal, a storage unit for storing the grain threshed by the threshing device, a selection means for selecting the grain threshed by the threshing device, and the selection means A discharge port for discharging the processed product after the sorting process, a detection means for detecting the impact force of the grain contained in the processed product, and a grain discharged from the discharge port based on a detection value of the detection means In a combine equipped with a calculation means for calculating the grain amount,
The combine is characterized in that the calculation means includes a correction means for correcting the grain amount in accordance with the selection operation state of the selection means. The sorting means includes tang
The combine according to claim 1, wherein the correction means corrects the grain amount according to the air volume of the tang. The sorting means includes a chaff sheave,
The combine according to claim 1 or 2, wherein the correcting means corrects the grain amount according to the angle of the chaff sheave.

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