JP2020031598A - Combine harvester - Google Patents

Abstract

To provide an engine rotating speed controlling device which restrains a decrease in an engine rotating speed in a state that a threshing load is increased, and prevents the occurrence of screening failure so as to smoothly maintain threshing screening work.SOLUTION: A combine harvester which includes an engine rotating speed controlling device for automatically increasing an engine rotating speed related to the acceleration operation of a traveling gear shift lever in a state of being connected with a threshing clutch is such that: threshing load detection means for detecting a threshing load is provided; when a threading load is detected to be a maximum load state or a load state in the vicinity by the threshing load detection means, the deceleration of the engine rotating speed is restrained even the traveling gear shift lever is operated to a deceleration side; and threshing load display means 55A for displaying a threshing load detected by the threshing load detection means is provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a combine.

  In conventional agricultural machines, the accelerator operation is linked to the gear shift operation of the gear shift operation tool, and the gear shift operation tool is operated on the speed increasing side to increase the engine rotation speed as the running speed increases, thereby reducing the running load. Techniques for obtaining a corresponding engine output are known. (Patent Document 1)

JP 2013-049328 A

  When the above-described conventional technology is applied to a combine, during a mowing operation, for example, in order to cope with an increase in threshing load due to the introduction of a large amount of grain stalks into a mowing device, when the traveling speed is reduced, The rotation speed of the engine will also be reduced in conjunction with the rotation of the engine, and the wind of Karino and the oscillating speed of the oscillating sorting shelf provided in the threshing device linked without passing through the transmission from the engine will decrease, resulting in poor sorting There's a problem.

  Therefore, an object of the present invention is to suppress the decrease in the engine rotation speed in a state where the threshing load is increased, to prevent the occurrence of sorting failure, and to smoothly maintain the threshing sorting operation.

  In order to solve the above problems, the present invention takes the following technical measures.

  That is, the invention according to claim 1 automatically increases the engine rotational speed in connection with the speed-up operation of the traveling speed change lever with the threshing clutch connected, and relates to the speed reduction operation of the traveling speed change lever. A threshing load detecting means for detecting a threshing load, and the threshing load detecting means reduces the threshing load to a maximum load state or a load in the vicinity thereof. In a state where it is detected that the vehicle is in the state, even if the traveling speed change lever is operated to the deceleration side, the reduction of the engine rotational speed is restrained, so that a combine is provided.

  The invention according to claim 2 is the combine according to claim 1, further comprising threshing load display means for displaying the threshing load detected by the threshing load detection means.

  In a state where the threshing load is detected by the threshing load detecting means to be in the maximum load state or a load state in the vicinity thereof, the engine may be operated even if the traveling speed change lever is operated to the deceleration side. The combine according to claim 1 or 2, wherein the rotation speed is maintained at a rated rotation speed.

  The invention according to a fourth aspect is the combine according to the third aspect, wherein the holding of the rated rotation speed is released when the threshing load falls within a set range.

  The invention according to claim 5 is configured such that the holding of the rated rotation speed is released when the traveling speed change lever is operated to the neutral position in a state where the threshing load is reduced within a set range. In the combine described in the above section.

  According to the first aspect of the present invention, when the threshing load detecting means detects that the threshing load is in the maximum load state or in a load state in the vicinity of the maximum load state, the engine can be operated even if the traveling speed change lever is operated to the reduction side. Since the rotation speed is reduced, the drive speed of the threshing device linked to the engine and the driving speed of the rocking sorting shelf does not decrease, and the proper sorting is maintained by maintaining the airflow of the rock and the rocking speed of the rocking sorting shelf. The state is maintained, and the occurrence of sorting failure can be prevented.

  According to the second aspect of the invention, in addition to the effect of the first aspect, the operator can recognize the threshing load by visually recognizing the threshing load display means, and can operate the traveling speed change lever. It is possible to recognize the cause of the engine speed not decreasing regardless of the deceleration operation.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the threshing load detecting means detects that the threshing load is in the maximum load state or a load state in the vicinity thereof. In this state, the engine speed is maintained at the rated speed even if the traveling speed change lever is operated to the deceleration side, so that the threshing processing capability can be maintained at a high level.

  According to the fourth aspect of the present invention, in achieving the effect of the third aspect of the present invention, the holding of the rated rotation speed is released when the threshing load falls within the set range, so that the traveling speed change lever is provided. In response to the deceleration operation, the engine rotation speed is reduced, and the traveling speed can be smoothly reduced.

  According to the fifth aspect of the present invention, in achieving the effect of the third aspect of the present invention, the holding of the rated rotational speed is performed by setting the traveling speed change lever to the neutral position in a state where the threshing load is reduced within a set range. Since it is released when it is operated, a smooth reverse running can be performed in accordance with the reverse operation of the travel shift lever.

It is a right view of a combine. It is a top view of a combine. It is a top view of the control part of a combine. It is explanatory drawing of the operation panel including the threshing load display part (threshing load display means). It is an explanatory side view of threshing load detection means (layer thickness sensor). FIG. 3 is a block circuit diagram of an engine speed control device. FIG. 4 is an explanatory diagram of a load level displayed on a load monitor.

As shown in FIGS. 1 and 2, the combine is equipped with a threshing device 3 on the left side of a body frame 2 provided with a traveling device 1, and a control unit 4 provided on a right front portion of the body frame 2. A grain tank 5 is mounted on the rear side, and a mowing device 6 is provided on the front side of the body frame 2 so as to be able to move up and down.
The traveling device 1 includes a left and right endless crawler 11 extending over left and right driving sprockets 8 driven by a traveling mission 7 and a number of rolling wheels 10 pivotally supported by left and right rolling frame 9 supporting the body frame 2. Is wound around. The transmission mission 7 receives a shift driving force from a hydraulic stepless transmission (not shown) that is shifted by a traveling transmission lever (described later) provided on the control unit 4, and transmits left and right driving sprockets via left and right side clutches. 8 is driven. When the steering lever 12 provided on the steering section 4 is tilted in the turning direction, the side clutch on this side is disengaged and the driving of one of the driving sprockets 8 is stopped, and the turning is performed.
The driving force of the engine E mounted on the lower part of the control unit 4 is input to the hydraulic continuously variable transmission.

  The threshing device 3 is composed of an upper handling room 13 and a lower sorting room 14, and a handling drum (not shown) is rotatably provided in the upper handling room 13. A dust exhaust fan is installed. A swing sorting shelf 42 (see FIG. 5) is provided in the sorting room 14 so as to be able to swing back and forth. Be placed.

The driving force of the engine E is input to the threshing device 3 through a belt tension type threshing clutch (not shown).
The control unit 4 has a cockpit S provided above an engine cover that covers the engine E, and has an operation panel P provided with a steering lever 12 and the like in front of the cockpit S. Thrusting clutch for connecting and disconnecting a traveling speed change lever L for shifting the hydraulic continuously variable transmission through a mechanical interlocking mechanism and a threshing clutch (not shown) for transmitting the driving force of the engine E to the threshing device 3 A lever DC, a cutting clutch lever KC for connecting and disconnecting a cutting clutch (not shown) for transmitting a driving force of the engine E to a cutting device 6 described later, and an engine by manually adjusting a fuel supply amount to the engine E side. It has a side operation panel SL provided with a throttle lever 69 for adjusting the rotational speed. The control section 4 may be configured to be covered by a cabin.

  The Glen tank 5 is formed in a box shape having a bottom-side transfer spiral in the front-rear direction on the bottom, and a first fry cylinder 18 for frying the sorted kernels from the threshing device 3 on the upper side wall inside the fuselage. The ends are in communication. On the rear side of the Glen tank 5, a fry section 20 of a discharge auger 19 that takes over the grains from the bottom transfer spiral and discharges the grains to the outside is provided upright. The rear end of the bottom transfer spiral and the lower part of the frying spiral contained in the fryer 20 are gear-coupled, and the driving force of the engine E is applied to the front end of the bottomal transfer spiral via a discharge clutch (not shown). It is configured to be input from.

  The cutting device 6 includes a weeding rod (not shown) provided at the front end, a lug-type raising device 23 obliquely provided on the rear side of the weeding culm, and a clipper-type device disposed at the lower rear of the raising device 23. And a transport chain (not shown) for transporting the harvested grain culm toward the threshing apparatus 3 and the like, and can be turned up and down on a suspension stand erected at the front of the body frame 2. It is pivoted on. A hydraulic cylinder (not shown) that expands and contracts by the forward and backward tilting operation of the steering lever 12 is provided, and the mowing device 6 is moved up and down by the expansion and contraction operation of the hydraulic cylinder.

  As shown in FIGS. 1 to 3, the control section 4 supports a cockpit S on an upper part of an engine cover 50 in which the engine E is installed, and a step 51 for a driver to board is provided on a lower front side of the engine cover 50. A front operation post 52 is erected at the front end of the step 51, and a parking brake pedal 53 is arranged above the front part of the step 51.

  The operation panel P described above is mounted on the upper end of the front operation post 52, and a handle 54 is provided on the rear side of the operation panel P.

  As shown in FIG. 3, the above-described steering lever 12 is provided upright at the right end of the operation panel P, and a monitor 55 is disposed at the center of the operation panel P in the left-right direction. KY is a key switch for starting the engine E.

As shown in FIG. 4, the monitor 55 includes a threshing load display section (threshing load display means) 55A for displaying a threshing load, a traveling speed display section 55B for displaying a work traveling speed, and a handling depth adjustment position. , A lighting state display section 55D for displaying the lighting state of the traveling light and the working light, and a grain storage amount display section 55E for displaying the grain accumulation height in the Glen tank 5. And a fuel storage amount display unit 55F for displaying the fuel storage amount, and a message display unit 55G including a liquid crystal panel.
(Threshing load detection means)
As shown in FIG. 5, a float type layer thickness sensor 56 for detecting the layer thickness of the object to be sorted on the sorting sheave provided in the swing sorting shelf 42 is provided at the center of the swing sorting shelf 42 in the front-rear direction. Provide.

  The layer thickness sensor 56 includes a sensor arm 56B having a float 56A on the free end side and a potentiometer 56C for detecting the rotation angle of the sensor arm 56B that rotates vertically when the float 56A is pushed up by the workpiece. Be composed.

  That is, the configuration is such that the larger the layer thickness of the sorting object on the swing sorting shelf 42, the larger the amount of grain culm supplied to the threshing device 3 and the greater the threshing load.

In addition, when the grain stalk is moist, the threshing load increases, and the sorted material is less likely to leak from the swing sorting shelf 42, so that the layer thickness of the sorted material on the swing sorting shelf 42 increases. .
(Engine speed control device)
Thus, the engine speed control device 57 has a control ON / OFF switch 59 for switching the engine speed control between an effective state and an invalid state, a potentiometer 56C of a layer thickness sensor 56, A traveling speed sensor 60 for detecting the speed, a shift operation potentiometer 61 for detecting the longitudinal rotation angle of the traveling shift lever L, a cutting clutch connection state sensor 62 for detecting a connection / disconnection state of the cutting clutch, and connection of a threshing clutch. A threshing clutch connection state sensor 63 for detecting a / cutoff state, an engine output rotation speed sensor 64 for detecting the output rotation speed of the engine E, and a throttle lever potentiometer 70 for detecting the operation angle of the throttle lever 69 are connected.

On the output side of the controller 58, on the output side, a lighting control unit 66 for controlling the lighting of eight light-emitting diodes 65 having a square light-emitting unit forming a threshing load display unit (load monitor); A governor control unit 67 that controls the fuel supply amount to change the output rotation speed and a message display control unit 68 that displays a short sentence on the message display unit 55G are connected.
(Engine speed control)
The engine E is started, the throttle lever 69 is operated to increase the speed, the output rotation speed of the engine E is set to the rated speed (2800 rpm in this embodiment), the cutting clutch and the threshing clutch are connected, and the traveling speed change lever L To the forward side to start the mowing and threshing operation.

  When the traveling speed change lever L is operated to increase the forward speed while the control ON / OFF switch 59 is switched to the effective side, the operation angle of the traveling speed change lever L is detected by the speed change operation potentiometer 61, and the governor control unit 67 is controlled by the controller 58. And the fuel supply amount to the engine E side is increased, and the output rotation speed of the engine E is increased. The forward operation angle of the travel shift lever L and the output rotation speed of the engine E are set in a proportional relationship.

  The grain stalks harvested by the reaping device 6 are supplied to the handling room 13 of the threshing device 3 and threshed, and the hulled grains, branch stalks and straw chips are placed on a swing sorting shelf 42 provided in the sorting room 14. It leaks and a layer of the object to be sorted is formed.

  When a large amount of the harvested culm is supplied, or when the culm to be cut is wet, the leakage of the sorted material downward from the swing sorting shelf 42 is delayed, and Increases the layer thickness of the object to be sorted. Thereby, the float 56A of the layer thickness sensor 56 is pushed up, and the layer thickness of the object to be sorted is detected based on the detection value of the potentiometer 56C.

  A state in which the layer thickness of the object to be sorted thus detected is a maximum layer thickness preset in the controller 58 or a layer thickness close to the maximum layer thickness (layer thickness levels 7 to 9 of a load monitor to be described later with reference to FIG. 7). In the case of), even if the traveling speed change lever L is operated to the deceleration side, the amount of fuel supply per unit time to the engine E side by the governor control section 67 is fixed, and the engine rotation speed is not reduced (the deceleration is suppressed). .

  That is, the threshing load is determined from the layer thickness of the sorting target object detected by the layer thickness sensor 56, and when the threshing load is detected to be in the maximum load state or a load state in the vicinity thereof, the traveling speed change lever L Even if is operated to the deceleration side, deceleration of the engine rotational speed is suppressed and the rated rotational speed is maintained. Alternatively, a configuration may be adopted in which the reduction of the engine rotation speed is suppressed, and the engine rotation speed when the threshing load reaches the maximum load state is maintained.

  When the layer thickness detected by the layer thickness sensor 56 falls to a range set in advance by the controller 58 (a layer thickness level 6 or less on a load monitor display in FIG. 7 described later), the above-described engine rotation The deceleration check of the speed is released, and the speed is controlled to the engine output rotational speed according to the position of the speed reduction device of the traveling transmission lever L.

  When the travel shift lever L is operated to the neutral position (travel stop position), the above-described deceleration check of the engine rotational speed may be released.

  However, if the engine speed is maintained at a speed that does not reach the rated speed, operating the traveling speed change lever L from the neutral position to the forward side or the reverse side automatically causes the engine speed to reach the rated speed. The speed is configured to be increased.

In addition, a position sensor 71 for detecting the height of the reaper 6 with respect to the machine frame 2 is connected to the input side of the controller 58, and it is detected that the reaper 6 has risen to a height higher than the set height with respect to the machine frame 2. In this case, the harvesting clutch and the clutch of the feed chain provided on the side of the handling room may be automatically shut off, and the engine speed may be maintained at the rated speed. However, even when it is detected that the mowing device 6 has risen above the set height with respect to the body frame 2, if the threshing load is at the maximum load, the control for maintaining the engine speed at the rated speed is performed. Is canceled. Thereafter, when the threshing load decreases from the maximum load to an appropriate load, the control for maintaining the engine rotation speed at the rated rotation speed returns to the valid state.
(Display control of load monitor)
As shown in FIG. 7, the detection result by the layer thickness sensor 56 is set to ten levels from the layer thickness level 0 to 9, and the controller 58 outputs to the lighting control unit 66 according to the detection result. , The eight light-emitting diodes 65 of the threshing load display section 55A are sequentially turned on.

  When the threshing clutch is disconnected, the engine load may be displayed on the threshing load display section 55A. The load state displayed on the threshing load display section 55A can be distinguished from the engine load or the threshing load. As described above, the indicator 72 may be provided on one of the left and right sides of the threshing load display section 55A. The indicator 72 and the buzzer 73 are connected to the output side of the controller 58, and when the threshing load is maximized, the buzzer 73 is sounded and the indicator 72 is blinked five times. Please move the shift lever to the deceleration side. " Alternatively, the entire surface of the monitor 55 may be a liquid crystal screen, and the display may be interrupted on this screen. The buzzer 73 is built in the front wall side of the front operation post 52, but may be provided on the threshing device 3 side, or may be provided on both the front operation post 52 side and the threshing device 3 side. The two buzzers 73 may sound simultaneously. When the buzzer 73 is to be repeatedly sounded, a pattern of sounding 100 msec and sounding stop 250 msec, and a pattern of sounding 100 msec and sounding stop 150 msec are set. These two patterns may be configured to be automatically selected according to the traveling distance or the elapsed time. The sound of the buzzer 73 is configured to be released by pressing the horn switch.

  Further, as a condition of the above-mentioned short interruption display, the traveling speed detected by the traveling speed sensor 60 may be 0.2 m / s or more. Further, a cereal stalk sensor 74 provided in the mowing device 6 for detecting a culm to be reaped is connected to the input side of the controller 58, and the fact that the cereal stalk sensor 74 detects the cereal stalk is used as an interrupt condition in the above short sentence May be added. In a state where the parking brake pedal 53 is depressed, the condition based on the traveling speed may be invalidated.

  Further, the larger threshing load or engine load may be displayed on the threshing load display section 55A.

  In the case where the layer thickness sensor 56 has a poor adjustment, the eight light emitting diodes of the threshing load display section 55A may be turned on and off at the same time.

55A threshing load display section (threshing load display means)
57 Engine speed control device L Travel shift lever E Engine

Claims (5)

  An engine that automatically increases the engine speed in connection with the speed-up operation of the traveling speed change lever and automatically reduces the engine speed in connection with the deceleration operation of the traveling speed change lever with the threshing clutch connected. In a combine provided with a rotation speed control device, a threshing load detecting means for detecting a threshing load is provided, and in a state where the threshing load is detected by the threshing load detecting means to be in a maximum load state or a load state in the vicinity thereof, A combine wherein the engine speed is reduced even if the traveling speed change lever is operated to a deceleration side.   The combine according to claim 1, further comprising threshing load display means for displaying the threshing load detected by the threshing load detection means.   In a state in which the threshing load is detected by the threshing load detecting means to be in the maximum load state or a load state in the vicinity thereof, the engine speed is maintained at the rated speed even if the traveling speed change lever is operated to the deceleration side. The combine according to claim 1 or 2, wherein the combine has a configuration.   The combine according to claim 3, wherein the holding of the rated rotation speed is released when the threshing load falls within a set range. The combine according to claim 3, wherein the holding of the rated rotation speed is released when the traveling speed change lever is operated to a neutral position in a state where the threshing load is reduced within a set range.

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