JP3831243B2 - Combine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combine that continuously harvests threshing and threshing during traveling by an engine driving force.
[0002]
[Problems to be solved by the invention]
Conventionally, there is a means for performing vehicle speed shift control in response to a change in engine load to perform output control for keeping the engine speed substantially constant, and for giving an overload warning when the engine load is overloaded. When the traveling load becomes large when turning in a non-cutting work state on a headland or the like, there is a disadvantage that an overload alarm is issued because the driving load becomes larger than the limit value during the cutting work.
[0003]
[Means for Solving the Problems]
Therefore, in the present invention, when the engine load during work is larger than the engine overload set value set in advance by the overload alarm setter as a reference value, in the combine that outputs an overload alarm, A turning means for detecting a turning state of the airframe is provided, and when the turning direction of the non-cutting work is detected by the turning means , the reference value is changed to an engine overload set value that is higher by a fixed value than during the cutting work. A controller is provided to stop the output of the overload alarm until the engine load becomes equal to or higher than the changed reference value, and the vehicle speed deceleration rate previously set by the vehicle speed deceleration setting device as a normal value is set by the controller. By reducing the vehicle speed by changing to a large deceleration rate, the running load is reduced and the engine speed is controlled to be substantially constant. There is provided a combine, wherein the.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an overall side view of the combine, and FIG. 2 is a plan view thereof. In FIG. 1, 1 is a machine base equipped with a traveling crawler 2 via a track frame 3, and 4 is an axis perpendicular to the traveling direction of the machine body. Threshing section comprising two large and small diameter screw-type first and second handling cylinders 5 and 6 and a swing sorter 7, etc., 8 is a threshing section that is arranged above the threshing section 4 and is taken out through the milling cylinder 9 4 is a grain tank for storing grains, 10 is an upper carry-out auger for taking out grains in the grain tank 8, 11 is an engine room in which an engine 12 is installed behind the grain tank 8, and 13 is a driver's seat 14. And a steering handle 15 and the like provided in the cab 16 and disposed above the front of the threshing section 4, 17 is a step for getting on and off the left and right workers, 18 is threshing. Hydraulic cutting lift cylinder 19 at the lower front of part 4 Is a reaper to be equipped with movable up and down.
[0007]
The reaping part 18 is constituted by a reaping header 20 for taking in uncut cereal grains, and a feeder house 21 connected to the rear center of the header 20 to feed the reaped grains to the threshing part 4. An uncut shearing reel 22, a reciprocating cutting blade 23, and a scraping auger 24 are provided in the harvesting header 20, and the feeder house 21 is located below the cab 16 from the driver seat 14 in the center of the cab 16. It is arranged so as to be displaced to the left side, and the cereal grains to be taken into the header 20 are fed to the beater 26 on the left side of the front part of the threshing part 4 via the supply conveyor 25 provided in the feeder house 21 so as to be threshed. It is composed.
[0008]
As shown in FIG. 3, the transmission case 27 has a hydraulic continuously variable transmission mechanism 27 incorporating a hydraulic pump and a hydraulic motor, and the transmission input shaft 30 of the continuously variable transmission mechanism 27 is connected to the belt 31 by the output shaft 29 of the engine 12. The driving crawler 2 is driven to be variable in speed, and the first and second handling cylinders 5 and 6 are connected to the engine output shaft 29 via the belt transmission system 32 to drive the threshing unit 4. 2 The cutting input shaft 34 of the supply conveyor 25 is connected to the handling cylinder shaft 33 of the handling cylinder 5 via a belt 35 to drive the cutting unit 18.
[0009]
As shown in FIG. 5, an electronic governor 36 that automatically performs output control that keeps the rotational speed of the engine 12 substantially constant, is a rack solenoid that adjusts the fuel injection amount of the fuel injection pump of the engine 12. A solenoid 38, a rack position sensor 39 for detecting the fuel injection amount of the solenoid 38, a pickup type rotation sensor 40 for detecting the rotational speed of the engine 12, and an operation amount of an accelerator lever or a pedal operated by an operator are detected. A potentiometer-type accelerator sensor 41 is connected to an electronic governor controller 42 to constitute the electronic governor 36, and a buzzer 43 that gives an overload warning of the engine 12 and a load monitor 44 that displays the work status are connected to the controller 42. I am letting. The fuel supply amount of the engine 12 is automatically adjusted by the control of the solenoid 38 based on the detection results of the sensors 39, 40, and 41, so that the rotational speed of the engine 12 is substantially constant even when the load of the engine 12 changes. When the output of the engine 12 calculated based on the detection results of the rack position sensor 39 and the rotation sensor 40 becomes larger than the setting and the engine 12 is overloaded, the buzzer 43 is configured to sound an overload warning to the operator.
[0010]
Further, a work controller 45 for controlling a traveling unit such as the cutting unit 8 and the continuously variable transmission mechanism 27 is connected to the electronic governor controller 42, and the overload warning control of the buzzer 43 is regulated by the cutting up / down state. The cutting switch 47 for detecting the on / off operation of the cutting clutch 46 by means of, the manual switch 48 for raising and lowering the cutting unit 18 by manual operation, the operation of raising the cutting unit 18 of the cutting height to the turning height and the turning height An automatic elevating switch 49 that performs an operation of lowering the cutting unit 18 to the cutting work height, a potentiometer type cutting height cutting sensor 50 that detects the height of the cutting unit 18 with respect to the main unit, a steering handle 15, and the like An overload alarm is provided when the load factor of the engine 12 exceeds the setting, and the straight travel switch 51 provided in the operation unit for detecting the straight travel and turning motion of the aircraft. An overload setter 52 for turning, a vehicle speed reduction setter 53 for setting a vehicle speed reduction rate when the vehicle turns, an electric reaping motor 54 for turning on and off the reaping clutch 46, and reaping by operating the elevating cylinder 19 The work controller 45 is connected to an electromagnetic lift valve 55 that performs lift control of the unit 18 and an electric transmission motor 56 that operates the shift mechanism 27 to control shift of the vehicle speed. Then, the lifting valve 55 is operated by operating the manual switch 48 or the automatic lifting switch 49 to move the cutting unit 18 up and down, and when the cutting switch 47 is turned off or the automatic lifting switch 49 is operated, the cutting unit 18 moves the cutting work height. When the cutting height is raised to the turning height, the cutting motor is operated to cut the cutting clutch 46, while the cutting switch 47 is turned on or the automatic lifting switch 49 is operated to move the cutting portion 18 from the turning height. When lowered to the cutting work height, the cutting motor 54 is operated to turn on the cutting clutch 46.
[0011]
Further, the control contents of the harvesting motor 54, the lifting valve 55 and the transmission motor 56 of the work controller 45 are input to the electronic governor controller 42, and when the lifting cylinder 19 raising control and the cutting clutch 46 disconnection control are performed, The overload alarm for the buzzer 43 by the electronic governor controller 42 is prohibited, and the overload alarm for the buzzer 43 is permitted when the elevating cylinder 19 descending control and the cutting clutch 46 engagement control are performed.
[0012]
Further, as shown in FIG. 4, the load monitor 44 includes an overload display unit 58 for displaying a load display unit 57 that gradually displays a change in engine load in a liquid crystal display stepwise when the engine is overloaded, and an engine rotation during operation. An engine rotation display unit 59 for displaying the number on the liquid crystal is provided, and the operator is notified of the engine load state during work by the load display unit 57 and the engine overload state by the alarm buzzer 43 and the overload display unit 58. It is composed.
[0013]
Then, as shown in the flowchart of FIG. 6, with the cutting switch 47 turned on, the cutting clutch 18 is switched to ON, and the cutting unit 18 is lowered to the predetermined cutting work height position by the manual switch 48 or the automatic lift switch 49. When in the cutting operation state, the load monitor 44 displays the cutting operation, and during the cutting operation, based on the load of the engine 12 calculated from the detection results of the rack position sensor 37 and the rotation sensor 40, the accelerator sensor 41 By contrast with the set value, the fuel injection solenoid 38 is operated to control the output of the engine 12 so as to keep the rotational speed of the engine 12 substantially constant. Prevent clogging during transport. Further, when the load of the engine 12 during work becomes a certain level or more (for example, 85 to 90%), the vehicle speed is reduced to reduce the engine load, and the engine load increases even when the vehicle speed reduction reaches the limit. When the load of the engine 12 being worked becomes larger than the load set by the device 52 (for example, the engine load factor 95%), the overload state of the engine 12 is indicated by the ringing of the buzzer 43 and the lighting of the overload display portion 57. Let them know.
[0014]
On the other hand, when the cutting switch 47 is turned off and the cutting clutch 46 is turned off, or when the cutting part 18 is automatically raised by the operation of the automatic lift switch 49 and the cutting clutch 46 is turned off, the straight switch 51 is When the body turns during non-cutting work at a headland or the like that is turned on, the panel display 44 displays a turning indication for non-cutting work, and the load of the engine 12 during the work is set load (engine load factor 95%) ), The buzzer 43 stops ringing, the overload display unit 57 is turned off, the overload alarm is prohibited, and the engine speed is controlled to be substantially constant.
[0015]
As is clear from the above, in the combine that outputs an overload warning when the engine is overloaded during work, turning means 47, 50, and 51 for detecting the turning direction of the machine during non-reaping work are provided, and the non-reaching work is performed. By stopping the overload alarm output when turning inside the aircraft, overload during normal mowing work is detected early and appropriate measures are taken to improve work stability and non-mowing work It is possible to improve the stability of turning work by eliminating problems such as an overload alarm being output due to an overload during turning and the turning operation being interrupted.
[0016]
In addition, by providing an overload alarm setting means 52 for changing an overload alarm reference value for outputting an overload alarm, the reference value for outputting an overload alarm can be easily changed in accordance with various conditions such as a work environment. The engine performance can be maintained stably by providing an appropriate overload warning.
[0017]
Furthermore, by providing the vehicle speed deceleration setting means 53 for changing the vehicle speed deceleration rate of the vehicle speed, a deceleration rate that is arbitrarily set (for example, 10 to 30%) when the engine load during the cutting operation or turning operation becomes large. As a result, the vehicle speed can be reduced and the vehicle can travel with good stability and engine performance can be maintained stably.
[0018]
In addition, as shown in FIG. 7, when turning the body in the non-reaping work state, the engine overload setting value (for example, engine load factor 95%) set in advance as a reference value by the overload alarm setting device 52 is used as the work controller. The engine overload setting value (for example, engine load factor is approximately 98%) higher than that during the cutting operation by 45 is changed to a value higher than the engine overload setting value (engine load factor is approximately 98%). While stopping the ringing and the like, the work controller 45 changes the deceleration rate of the vehicle speed when approaching an overload to a deceleration rate (for example, 20%) larger than a normal value (for example, 15%) to reduce the traveling load. Alternatively, a configuration in which the engine speed is controlled to be substantially constant may be used. Then, by changing the speed reduction rate of the vehicle speed when the aircraft is turning during non-reaping work, the vehicle speed when turning the aircraft on a field headland or the like where the traveling load increases is satisfactorily reduced, and the engine 12 is excessively driven. The engine 12 can be prevented from being driven by a load, and the engine performance can be maintained stably. The engine 12 is overloaded by properly reducing the vehicle speed when turning the body in a field headland where the traveling load increases. The engine performance can be stably maintained by preventing driving.
[0019]
【The invention's effect】
In the present invention, when the engine load during work is larger than the engine overload set value set in advance by the overload alarm setter as a reference value, the combiner that outputs an overload alarm in the combiner during non-reaping work A controller for changing the reference value to an engine overload set value that is higher by a fixed value than during the mowing work when the turning means for detecting the turning state is detected. And the controller stops the output of the overload alarm until the engine load exceeds the reference value after the change, so an overload alarm is output due to overload during turning during non-cutting operations Thus, it is possible to improve the stability of the turning work by eliminating problems such as the turning operation being interrupted.
Then, the vehicle speed reduction rate set in advance by the vehicle speed deceleration setting device as a normal value is changed to a larger deceleration rate by the controller to reduce the vehicle speed, thereby reducing the driving load and keeping the engine speed substantially constant. Therefore, by changing the speed reduction rate of the vehicle speed when turning the aircraft during non-reaping work, the vehicle speed when turning the aircraft on a field headland etc. where the traveling load increases is reduced well. The engine can be prevented from being overloaded and the engine performance can be maintained stably, and the vehicle speed when turning the body in a field headland where the traveling load increases etc. can be satisfactorily reduced, The engine can be prevented from being overloaded and the engine performance can be maintained stably.
[Brief description of the drawings]
FIG. 1 is an overall side view of a combine.
FIG. 2 is an overall plan view of the combine.
FIG. 3 is an explanatory diagram of a drive system.
FIG. 4 is an explanatory diagram of a load monitor.
FIG. 5 is a control circuit diagram.
FIG. 6 is a flowchart.
FIG. 7 is a flowchart of load factor change.
[Explanation of symbols]
47 Cutting switch (turning means)
50 Cutting height sensor (turning means)
51 Straight switch (turning means)
52 Overload setter (overload alarm setting means)

Claims (1)

In the combine that outputs an overload alarm when the engine load during work is larger than the engine overload set value set in advance by the overload alarm setter as a reference value ,
A turning means for detecting the turning direction of the airframe during non-cutting work is provided, and when the turning direction of the airframe during non-cutting work is detected by the turning means , the reference value is higher than that during the cutting work by an engine overload. Provide a controller to change to the set value, stop the output of the overload alarm until the engine load exceeds the reference value after the change by the controller ,
The vehicle speed deceleration rate set in advance by the vehicle speed deceleration setting device as a normal value is changed to a larger deceleration rate by the controller to reduce the vehicle speed, thereby reducing the driving load and maintaining the engine speed substantially constant. Combine that is characterized by doing so .

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