JP2000209933A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a combine harvester eliminated in troubles of abrupt accelerations of the harvesters in a start of traveling and capable of operating safely by retaining the revolution of an engine in the previously determined rated speed in a specific method. SOLUTION: This combine harvester has an engine 4 as the power source of a travel gear, a reaper, a thresher of the like, an engine revolution changing mean changing the revolution of the engine 4, a control device outputting a changing control signal to the engine revolution changing mean, a speed changing mean to carry out the speed change operation of the travel gear and a thresher switch to switch the rotating power to the thresher, and in the case of setting the revolution of the engine 4 almost the same as the previously determined rated revolutions, the control device outputs a control signal setting the time required to elevate the revolution of the engine 4 to the predetermined rated revolution by operating the speed changing mean slower than the time in the on switching operation of the thresher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine for cutting and threshing rice, for example, in a field while moving an airframe.

[0002]

2. Description of the Related Art A combine harvester, as well as performing the above-described harvesting work, has many opportunities to move in a field or run on a farm road.

[0003]

However, the vehicle speed of the traveling device of the combine is generally configured to be able to select a continuously changing speed via a hydrostatic transmission (HST). However, when the speed change lever for moving the swash plate of the HST is operated, the rotation speed of the engine is increased from the rotation speed at no load to the rated rotation speed in connection with this operation. There is a danger of sudden acceleration at the time of danger.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and to provide a combine capable of performing a safe operation, and has taken the following technical means. That is, an engine 4 which is a driving source of the traveling device 1, the mowing unit 2, the threshing unit 3, etc., an engine speed changing unit for changing the speed of the engine 4, and a change control signal to the engine speed changing unit. The engine 4 includes a control device 5, a speed change operation means for performing a speed change operation of the traveling device 1, and a threshing on / off operation means for turning on / off the rotational power to the threshing unit 3.
When the rotational speed of the engine 4 is set to approximately the same as the preset rated rotational speed, the control device 5 increases the rotational speed of the engine 4 to approximately the same as the preset rotational speed by operating the shift operation means. The combine is characterized in that the control signal is output so that the time is made slower than the case of the threshing on / off operation means.

Further, an engine 4 which is a driving source of the traveling device 1, the mowing unit 2, the threshing unit 3, etc., an engine speed changing means for changing the speed of the engine 4, and a change control signal to the engine speed changing means. , A vehicle speed changing means for changing the vehicle speed of the traveling device 1, and a threshing on / off operation means for turning on / off the rotating power to the threshing unit 3, and the control device 5 controls a preset rotation speed of the engine 4. A control signal for changing the vehicle speed of the rotation speed changing means and the traveling device 1 is output so as to be within a predetermined range, and when the vehicle speed is increased, the speed is equal to or higher than a preset rotation speed from a no-load rotation speed. And outputting a control signal to the vehicle speed changing means at a speed lower than when the engine speed is within a preset speed from a no-load speed. It was down.

[0006]

The driver operates the engine switch provided on the operation panel of the driving unit to start the engine, and operates the respective operation levers to drive the rotating parts of the body such as the reaping unit 2 and the threshing unit 3, and the like. Move the aircraft forward to begin work. Then
The grain stalks cut and conveyed rearward in the cutting section are threshed in the threshing section, and the threshed paddy is sent from the threshing section 3 to the tank 4 and stored therein, and thereafter, the grain is discharged by the grain discharging device. Is discharged.

In such a work, when the speed change operating means is operated to select a desired speed when the body is moving forward, the rotation speed of the engine 4 becomes related to this when the speed of the engine 4 is not loaded. Hereinafter, it is referred to as "no-load rotation speed")
To a preset rotation speed (hereinafter referred to as “rated rotation speed”). The control device 5 outputs a control signal to the engine speed changing means so that the rising time is slower than the case of the threshing on / off operation means.

When controlling the vehicle speed in the harvesting operation, the control device 5 outputs a control signal to the rotation speed changing means and the vehicle speed changing means so that the preset rotation speed of the engine 4 is within a preset range. At the same time, when increasing the vehicle speed, a control signal to be performed at a lower speed than when the rotational speed is equal to or higher than a preset rotational speed from the no-load rotational speed and within a preset rotational speed from the no-load rotational speed is used. Output to vehicle speed changing means.

[0009]

[Effect] It is possible to improve the efficiency of harvesting work because the running of the aircraft is safe at the start and the ability of the engine can be used rationally.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. First, the structure will be described. The combine 6 is mounted on a front part of a chassis 7 equipped with a crawler-type traveling device 1 arranged at predetermined intervals in the left-right direction in the forward direction of the fuselage. The cutting unit 2 is provided so as to be able to move up and down freely by the lifting means, the threshing unit 3 is provided on the left side of the chassis 7 behind the cutting unit 2, and the tank 8 is provided on the right side of the threshing unit 3. An operation unit 10 surrounded by a cabin 9 with an air conditioner is provided in a space between the unit 2 and the air conditioner.

The cutting section 2 includes a plurality of weeding bodies 11 arranged in the right and left directions, and a lug 1 that moves obliquely upward and rearward.
Raising device 13 having a plurality 2 and arranged in the lateral direction
And a clipper-type cutting device 14 and a harvested grain culm transport device 15 for transporting the harvested grain stalk rearward and upward. In addition, a transmission device (either stepped or stepless may be used, and a bell-con may be used in the embodiment, but HST may be used, not shown) is provided in a drive unit to the mowing unit 2.

The threshing unit 3 has, on one side, an automatic grain culm feeding device 16 that rotates in the direction of movement of the machine body, and grips and transports the root portion of the grain culm carried by the harvested grain culm carrying device 15. This is a self-removing type configuration in which the tip is fed into a handling room to thresh. It should be noted that a normal type of mowing unit and threshing unit for supplying the cut culm into threshing may be used. The tank 8 is a hollow tank having a lower spiral (not shown) at the bottom, and temporarily accommodates the grains transported upward by the graining device (not shown) of the threshing unit 3 and temporarily stores the grains. It is provided rotatably on the side. The lower end of the conveying end of the spiral communicates with the lower end of a vertical fryer 17 whose axis is positioned vertically behind the tank 8, and the upper end of the vertical fryer 17 has a discharge port. Communicates with a discharge auger 18 which rotates vertically and horizontally.

The driving section 10 has a left operation panel 2 provided integrally above a seat 19 and a left operation panel 20 provided above.
1, the front operation wall 22 is erected on the front side thereof, and in plan view, the left operation wall 21 and the front operation wall 22 are tilted L
It is arranged in a letter shape. At the front end of the left operation panel 20 in the corner formed by the left operation wall 21 and the front operation wall 22, the inside is lowered outside (the corner side).
The instrument panel 23 is provided obliquely so as to face the seat 19 with a height.

The instrument panel 23 has a fuel gauge for displaying the amount of fuel, a blinker pilot for displaying blinking of the direction indicator, an engine tachometer for displaying the number of revolutions of the engine, an hour meter for displaying the operating time, Multi-eye that displays the operating status of the combine (engine operating status, cutting unit threshing unit clogging alarm, automatic device error display, operation switch switching display, paddy tank level display, body horizontal operation status display) A cutting synchro indicator and the like for displaying a cutting speed at the time of lodging are provided.

On the left operation panel 21, a turning mode for switching between a shift lever (HST lever) 24, a sub-shift lever 25, and a turning (super turning, gentle turning, etc.) mode is provided from the front side. A cut-off / threshing lever 27 provided with a cutting switch 26 for turning on and off a cutting clutch (not shown) provided on a transmission mechanism for transmitting rotational power to the cutting unit 2 on the upper side; A throttle lever 28 is provided in front of -25. Each of the levers 24, 2
5, 27, 28, and 29 are mounted on a horizontal shaft rotatably provided on the machine frame of the left operation wall 21 so as to be rotatable in the front-rear direction.

A horizontal shaft 44 of the throttle lever 28 has a gear 45 which is engaged with a gear 47 of a transmission mechanism 48 for transmitting the rotational power of a forward / reverse rotation motor 46 to one shaft end. Further, the outer wire 4 restricts the movement of both ends.
9 is pivotally connected to the throttle lever 28, and the other end of the inner wire 50 is pulled toward the original position by a tension spring 43.
Is pivoted to

A horizontal shaft (not shown) of the speed change lever 24 meshes with a gear (not shown) of a transmission mechanism (not shown) for transmitting the rotational power of the forward / reverse rotation motor 51 to one shaft end. A gear (not shown) is attached. And the speed change lever
A cutting automatic stop switch 31 for automatically stopping the driving of the cutting unit 2 is provided at the rear of the grip unit 30 of 24, and the supply depth of the grain culm to be supplied to the threshing unit 3 is increased on the right lateral side thereof. Manual (depth) switch 32 for operation
And a manual (shallow) switch 33 for performing an operation of reducing the supply depth of the grain culm to be supplied to the threshing unit 3 is provided on the rear side, and is disposed before and after.

Further, from the front left side of the left operation panel 20 in the forward direction of the machine, a supply depth dial switch 34 for selecting a supply depth according to the length of the grain stem to be threshed, An automatic direction control switch 35 for turning on and off the correction work, a vehicle speed adjustment dial switch 36 for adjusting the vehicle speed, an accelerator switch 37 for automatically controlling the number of revolutions of the engine 4, and many other switches are provided.

The driver passes through the space between the front operation wall 22 and the seat 19 and gets on and off from the right side. The driver is provided with a buzzer stop switch, a display changeover switch, a work light switch, and the like. Switch, key switch, etc., and an operation lever at the right end. The operation lever 38 moves up and down the reaping unit 2 when tilted forward and backward, and changes the traveling direction of the machine body to the left or right when tilted left and right. The lifting and lowering and direction correcting means have the same configuration as the well-known means, and a detailed description thereof will be omitted.

The block circuit shown in FIG. 6 will be described.
Memory 39 containing necessary data and control programs
The information to be input via the input interface 40 to the control device (operation control unit, CPU) 5 of the microcomputer having the
4. Automatic direction control switch 35 for turning on / off the automatic correction of the traveling direction of the aircraft, vehicle speed switch 36 for turning on / off the automatic control of the vehicle speed, accelerator switch 37 for automatically controlling the number of revolutions of the engine 4, and many other switches. Information, rotation speed sensor 5 for detecting the rotation speed of engine 4
2, the rotation lever rotation information output from the transmission lever sensor 54, and the accelerator position sensor 53.
And the accelerator information of the throttle lever 28 output from the controller.

As a part of the control output output from the control device 5 via the output interface 41, there are start command signals to the forward / reverse motors 46 and 51 and the like. The control device 5 has the following functions. That is, as a part of the function, when the driver turns on the vehicle speed switch 36 and the accelerator switch 37, the automatic control work information of the vehicle speed and the automatic control work information of the engine speed are fetched through the input interface 40. . A control signal is output to the forward / reverse rotation motors 46 and 51 so as to be within the range of the taken-in engine speed and the built-in proper engine speed.
When the accelerator position sensor 53 is on the open side, the rotation speed of the engine 4 is from the rotation speed at no load (no load rated rotation speed) to the preset rotation speed set in advance.
The control signal for increasing the speed is continuously output to the forward / reverse motor 51, and a pulse signal is output when the speed is within the range from the set rotation speed to the control maximum rotation speed. When the rotation speed exceeds the maximum control speed, the control signal for increasing the speed is not output. When the input information of the mowing / de-lever 27 is input, a start command signal is continuously output to the forward / reverse rotation motor 46 so as to increase from the no-load rated speed to the working rated speed. When speed change lever rotation information output from the speed change lever sensor 54 in which the speed change lever 24 has rotated from the neutral position is input, a pulse signal that increases from the no-load rated speed to the working rated speed is forward-reverse-driven. To the data 46. That is, the speed-up speed is slower than the case based on the input information of the mowing / de-lever 27.

Next, the operation will be described. First, the driver opens and closes the door of the cabin 9 and sits on the seat,
When the parking brake pedal is depressed and the key is turned on to the key switch to start the engine 4, the power output from the engine 4 is transmitted to the rotating parts of the body via the transmission mechanism. Then, the throttle lever 28 is turned to select the engine at a predetermined rotational speed, and the sub-transmission lever 25 is turned to the front side to select, for example, the standard, and then the cutting / de-lever 27 is operated. When the threshing unit 3 and the reaping switch 26 are turned on and the reaping unit 2 is driven, the mechanical conditions and the like are changed to the instrument panel 2.
3 is displayed on each display device.

Thereafter, when the preparation for the harvesting work is completed, the depressing of the parking brake pedal is released, and subsequently, the shift lever 24 is rotated forward to move the machine forward, and the operation lever 38 is tilted forward and backward. To determine the position of the reaper 2,
Alternatively, the tilting body is adjusted to a predetermined line while tilting left and right to change the traveling direction of the aircraft. Then, the root portion of the cereal culm caused by the rag 12 moving diagonally backward and upward along the provoke case of the provoke device 13 is cut by the reaping device 14 and inherited by the reamed cereal culm transport device 15. It is transported upward and backward.

Then, the cereal culm that has reached the conveying end portion is nipped by the automatic cereal culm feeding device 16 and conveyed backward, sent to a culm processing device such as a cutter for processing.
The ears of the culm are fed into the handling room and threshed. Processed products such as grains produced by this are separated into grains and straw chips by wind screening, and the grains are sent to the tank 8 by the transport device and stored therein. Thereafter, when the kernels in the tank are full, the driver interrupts the harvesting operation and performs the operation of discharging the kernels. Is discharged outside the machine, so that it may be transferred to a truck such as a truck.

When performing the vehicle speed control and the accelerator control in such a harvesting operation, the driver turns on the vehicle speed switch 36 and the accelerator switch 37. Then
The control device 5 takes in the vehicle speed control work information and the engine rotation automatic control work via the input interface 40.
When the shift lever 24 is rotated from the neutral position and the shift lever rotation information output from the shift lever sensor 54 is input, the control device 5 outputs a pulse signal to the forward / reverse rotation motor 46. Therefore, the speed at which the engine 4 rises from the no-load rated speed to the rated working speed is increased by the cutting / de-leveraging.
It rises slowly compared to the speed that rises when 27 enters. Therefore, when starting the running of the aircraft, it is possible to prevent sudden acceleration due to a sudden change in engine speed, and it is safe.

Further, in the operation of automatically controlling the vehicle speed, the control device 5 controls the rotation speed of the engine 4 taken in through the input interface 40 and the forward / reverse rotation mode so that the rotation speed is within the range of the pre-installed proper rotation speed. The control signal is output to the data 46 and 51. When the accelerator position sensor 53 is on the open side, the speed of the engine 4 is controlled by the forward / reverse rotation motor 51 from the no-load rated speed at no load to a preset set speed. A signal is output continuously, a pulse signal is output when the rotation speed is within the range from the set rotation speed to the control maximum rotation speed, and no control signal for increasing the speed is output when the rotation speed exceeds the control maximum rotation speed.

Therefore, when the accelerator approaches high idling, the engine 4 is fully utilized, and
Although the engine speed decreases with a slight increase in vehicle speed,
When the engine 4 has a margin, the speed is increased quickly. When the margin is exhausted, the engine speed is increased by fully observing the change in the engine speed after the acceleration, so that the vehicle speed control with good responsiveness and good stability is performed. And work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a plan view of the driving unit partially cut away.

FIG. 3 is an external view of an engine partially cut away.

FIG. 4 is a diagram showing a vehicle speed control operation.

FIG. 5 is a diagram showing control of the engine speed.

FIG. 6 is a block circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling device 2 Cutting part 3 Threshing part 4 Engine 5 Control device

Continued on front page F term (reference) 2B076 AA03 BA05 EA04 EC17 EC19 ED11 3G060 AA08 AB01 BA01 BA17 CC04 DA08 FA06 GA02 GA03 GA21 3G093 AA09 AB01 BA09 CB05 CB06 DA01 DA06 DB05 DB11 DB22 EA03 EA05 EC02 FB03

Claims (2)

[Claims] 1. An engine 4, which is a driving source of a traveling device 1, a reaper 2, a threshing unit 3, and the like; an engine speed changing means for changing the speed of the engine 4; Control device 5 that outputs the vehicle and traveling device 1
A speed change operation means for performing a speed change operation and a threshing on / off operation means for turning on / off the rotation power to the threshing unit 3, and a control device for setting the rotation speed of the engine 4 to substantially the same as a preset rated rotation speed 5 is a control signal for delaying the time required for raising the rotation speed of the engine 4 to approximately the same rotation speed as the preset rotation speed by operating the speed change operation means, as compared to the case of the threshing on / off operation means. A combine characterized by outputting. 2. An engine 4, which is a drive source of the traveling device 1, the mowing unit 2, the threshing unit 3, and the like; an engine speed changing unit for changing the speed of the engine 4; Control device 5 that outputs the vehicle and traveling device 1
Vehicle speed changing means for changing the vehicle speed of the engine, and threshing on / off operation means for turning on / off the rotating power to the threshing unit 3, and the control device 5 rotates the predetermined number of rotations of the engine 4 so as to be within a predetermined range. In addition to outputting a control signal for changing the vehicle speed of the number changing means and the traveling device 1 and increasing the vehicle speed, when the vehicle speed is equal to or higher than a preset rotational speed set from the no-load rotational speed, the control signal is preset from the no-load rotational speed. A combiner for outputting to a vehicle speed changing means a control signal to be performed at a lower speed than when the rotational speed is within a set rotational speed.