JP2000265863A - Accelerator control device for reaping working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a tilting motor from lowering of a life and damage due to overload by stopping forcibly moving of an acceleration lever when the acceleration lever is not moved by performing an automatic operation for the acceleration lever. SOLUTION: When a tilting motor 24 is normally rotated and an acceleration lever 2 is tilted in an open direction, an output of the tilting motor 24 is stopped if a value of an acceleration position sensor 25 is not changed to 0.1 V or more in the open direction for a second or more, for instance. When the value of the acceleration position sensor 25 is changed in a close direction after the output of the tilting motor 24 is stopped, the output stop of the tilting motor 24 is released and an acceleration control is restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator control device for a harvesting vehicle such as a combine or a harvester for automatically operating an accelerator lever to raise or lower an engine speed to a required height.

[0002]

When the accelerator lever is automatically operated by outputting a tilt motor for tilting the accelerator lever back and forth, a straw or the like may bite the accelerator or an object may be placed before and after the accelerator lever. Alternatively, if the accelerator lever is held down by manual operation, the accelerator lever may not move. At this time,
Attempting to move the accelerator lever forcibly may cause the tilting motor to seize or break the circuit, resulting in failure.

Accordingly, an object of the present invention is to automatically operate the accelerator lever to stop the accelerator lever from being forcibly moved when it does not move, and to protect the tilting motor and the circuit from shortening the life or damage due to overload. It is a thing.

[0004]

In order to achieve the above object, the present invention is configured as follows.

That is, a tilt motor for tilting the accelerator lever back and forth, automatic accelerator lever operating means for automatically operating the accelerator lever by outputting the tilt motor, and accelerator lever tilt angle detecting means for detecting the tilt angle of the accelerator lever. And an output of the tilting motor is stopped when the tilting angle of the accelerator lever does not change after a lapse of a predetermined time after outputting the tilting motor.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall side view of a combine embodying the present invention. In the figure, a is a combine crawler,
b is a crawler drive shaft, c is a mowing part, d is a feed chain that feeds the cut culm to the threshing machine while transporting it, e is a grain tank that stores threshed grain, and f is the stored grain outside the machine. Indicates the auger to be ejected.

FIG. 2 shows a switch layout of a driver's seat of a combine according to the present invention. Reference numeral 1 denotes an HST lever that tilts forward and backward to increase or decrease the vehicle speed. When the lever is tilted forward from a neutral position in the figure, the speed increases in the forward direction, and when the lever is tilted backward, the speed increases in the reverse direction. When the vehicle is returned from the forward or reverse position to the neutral position, the speed is reduced, and the aircraft stops at the neutral position. 2 is an accelerator lever that tilts forward and backward to open and close the throttle to raise and lower the engine speed. Tilt forward to open the throttle and raise the engine speed, tilt it backward to close the throttle and reduce the engine speed. Lower. Reference numeral 3 denotes a power steering lever which tilts forward and backward and left and right to operate the raising and lowering of the reaping unit and turning of the machine body. The aircraft turns to the left when tilted to the left and turns to the right when tilted to the right.

FIG. 3 shows a mechanism diagram of an accelerator lever 2 embodying the present invention. The accelerator lever 2 pivotally supports an operation piece bent in a U-shape on a support shaft 2a to be rotatably mounted. A knob 21 is attached to the tip of the accelerator lever 2,
The start end of the throttle wire 22 is connected to the base end. The tilting motor 2 is connected to one side of the support shaft 2a via a reduction gear 23.
4 and an accelerator position sensor 25 composed of a potentiometer on the other side. The end of the throttle wire 22 is connected to a throttle lever 26 pivotally supported on the throttle shaft 2b. A return spring (not shown) is attached to the throttle shaft 2b to return the throttle lever 26 to the closed position.

The accelerator lever 2 is configured as described above.
To open the throttle, the tilt motor 24 is rotated forward to tilt the accelerator lever 2 forward. As a result, the throttle lever 26 is rotated in the opening direction by being pulled by the throttle wire 22 connected to the base end. When closing the throttle, the tilt motor 24 is rotated in the reverse direction to tilt the accelerator lever 2 backward. As a result, the throttle wire 22 connected to the base end is loosened, and is urged by the return spring to return the throttle lever 26 in the closing direction. The accelerator position sensor 25 detects the tilt angle of the accelerator lever 2 and controls the rotation of the tilt motor 24 to adjust the opening of the throttle.

In the accelerator control device embodying the present invention, when the tilt motor 24 is rotated forward and the accelerator lever 2 is tilted in the opening direction, the value of the accelerator position sensor 25 becomes 0 for at least one second, for example. If it does not change in the opening direction by 1 V or more, the output of the tilt motor 24 is stopped. After the output of the tilt motor 24 is stopped, when the value of the accelerator position sensor 25 changes in the closing direction, the tilt motor 2
The output stop of No. 4 is released, and the accelerator control is restarted.

Alternatively, the accelerator position sensor 25
Is changed in the opening direction by, for example, 0.1 V or more,
The output stop of the tilt motor 24 may be released. When the operation position of the accelerator lever 2 is not fully open, the accelerator lever can be further operated in the opening direction, and thus the accelerator control can be restarted by operating in the opening direction other than the closing direction.

Conversely, when the tilt motor 24 is rotated in the reverse direction to tilt the accelerator lever 2 in the closing direction, for example, if the value of the accelerator position sensor 25 does not change in the closing direction by 0.1 V or more for at least one second, the tilt motor 24 Stop output of After the output of the tilt motor 24 is stopped, when the value of the accelerator position sensor 25 changes in the opening direction, the output stop of the tilt motor 24 is released and the accelerator control is restarted.

Alternatively, the accelerator position sensor 25
Is changed in the closing direction by, for example, 0.1 V or more,
The output stop of the tilt motor 24 may be released. When the operation position of the accelerator lever 2 is not fully closed, the accelerator lever 2 can be further operated in the closing direction. Thus, the accelerator control can be restarted by operating the opening direction other than the opening direction.

Next, in connection with the present invention, when the vehicle is stopped, the accelerator is manually returned to idling while the threshing lever is kept on, and if there is no operation for 10 seconds, the engine speed is reduced to 14%.
The accelerator control device of the combine which rises to 00 rpm will be described.

FIG. 4 shows a block diagram of the accelerator control device. The accelerator control device includes an engine rotation sensor 51, an accelerator position sensor 25 on the input side of the microcomputer 5 via an input interface 5a,
HST position sensor 52, threshing clutch 53 for intermittently connecting threshing pulley, paddy discharge clutch 54 for driving auger, vehicle speed sensor 55, sensor check switch 56 for selecting sensor check mode, and automatic accelerator for selecting accelerator control The switch 57 is connected, and the accelerator opening / closing relay 5 is connected to the output side via the output interface 5b.
8a, 58b and HST acceleration / deceleration relays 59a, 59b are connected.

This accelerator control device is configured as described above. When the threshing clutch 53 is engaged, the vehicle speed value of the vehicle speed sensor 55 is zero or less, the accelerator position sensor 25 detects the operation of closing the accelerator, and the engine rotation sensor 51 Detects the idling of 1100 rpm or less, outputs the accelerator opening relay 58a after 10 seconds, and raises the engine speed to 1400 rpm, which is higher than 1100 rpm.

In order to secure an invasion space at the beginning of cutting, the operator cuts the cereal stems in the space by hand and supplies the culm to a stopped combine to thresh, that is, a so-called pillow operation. For this reason, returning the accelerator lever to idling with the threshing lever still in place is highly likely to have further threshing refrained.

Conventionally, when the threshing lever is turned on, the engine speed is maintained at a required height, and when the accelerator lever is manually operated, the control is stopped and returned to idling.
For this reason, it took time to raise the engine speed to the required height when performing the pillow operation. This accelerator control device maintains the engine speed at 1400 rpm higher than idling when the threshing lever is turned on,
The engine speed can be quickly increased to cope with the next threshing.

Next, in connection with the present invention, a description will be given of an accelerator control device of a combine which automatically raises the engine speed to a required height by operating the HST lever forward with the threshing lever inserted.

In this accelerator control device, in the configuration of FIG. 4, the sensor value of the HST position sensor 52 moves forward, the threshing clutch 53 is engaged, and the engine rotation sensor 5
1 detects 2600 rpm or less, outputs an accelerator opening relay 58a to reduce the engine speed to the rated 260 rpm.
It rises to 0 rpm.

When shifting to normal work after pillow handling, the HST lever is operated forward without cutting the threshing lever, and forward movement, alignment, cutting, and threshing are often performed. This accelerator control device automatically raises the engine speed to a required height when the HST lever is operated forward while the threshing lever is kept in, so that it is not necessary to operate the accelerator lever each time.

Next, according to the present invention, when the vehicle is stopped in a non-working state, the engine speed should not be reduced to idling at once, but should wait once at 2,000 rpm before the engine. An accelerator control device of the combine to be dropped will be described.

In the accelerator control device shown in FIG. 4, when the paddy discharge clutch 54 and the threshing clutch 53 are both disengaged and the vehicle speed value of the vehicle speed sensor 55 is 0.01 or less, the engine rotation sensor 51 When detecting 2000 rpm or more, the accelerator closing relay 58b is output to reduce the engine speed to 2000 rpm. If the condition does not change after the lapse of 3 seconds, the accelerator closing relay 58b is output again to reduce the engine speed to 1100 rpm at idling.

In the conventional accelerator control device, when the vehicle is stopped in a non-working state, the engine speed is reduced to idling after waiting three seconds, but idling is slower and gives an uncomfortable feeling. This accelerator control device
If the vehicle is stopped in a non-working state, the speed immediately drops to 2000 rpm, so that such an uncomfortable feeling is eliminated. Also,
Since the engine is temporarily stopped at 2000 rpm and dropped to idling three seconds later, even if a sudden work occurs during that time, the engine speed can be quickly recovered and the work can be resumed.

Next, in connection with the present invention, a description will be given of an accelerator control device in which the reference operation position of the accelerator lever when automatically operating the accelerator lever following the HST lever can be arbitrarily set.

In this accelerator control device, in the configuration of FIG. 4, when the engine rotation sensor 51 detects 500 rpm or more and both the sensor check switch 56 and the accelerator automatic switch 57 are turned on, the accelerator control system adjustment mode is set. HST position sensor 52
After detecting the HST operation, the accelerator position sensor 25 detects the accelerator operation.
If not, the HST position sensor 5 at this time
2 and the sensor value of the accelerator position sensor 25 are stored in a non-volatile memory, and the HS value in the subsequent accelerator control is stored.
The reference operation position of the accelerator lever 2 with respect to the T lever 1 is set. Thereby, the reference operation position of the accelerator lever 2 when automatically operating the accelerator lever 2 following the HST lever 1 can be set according to the user's preference.

In this accelerator control device, in the accelerator control system adjustment mode, after detecting the engagement of the threshing clutch 53 or the paddy discharge clutch 54, the accelerator position sensor 25 detects the accelerator operation, and thereafter the accelerator operation is performed for one second or more. If not, the sensor value of the accelerator position sensor 25 at this time is stored in the nonvolatile memory,
The reference operation position of the accelerator lever 2 when the subsequent threshing lever or paddy discharge lever is inserted may be used. Thereby, the engine speed at the time of throwing the threshing lever or the paddy discharging lever can be adjusted at the user level according to the kind of paddy or the like.

Next, in connection with the present invention, when setting the reference operating position of the accelerator lever at the time of throwing the threshing lever or paddy discharging lever, the engine speed is set to the rated 2600 rpm.
An accelerator control device that increases to pm will be described.

The accelerator control device detects the engagement of the threshing clutch 53 or the paddy discharge clutch 54 in the configuration of FIG.
When the engine speed is detected to be equal to or less than pm, the accelerator opening relay 58a is output and the engine speed is increased to the rated 2600 rpm. Then, the accelerator position sensor 25 does not detect the accelerator operation for 3 seconds, and if it detects, the next 1
If the accelerator operation is not detected for a second, the sensor value of the accelerator position sensor 25 at this time is stored in the non-volatile memory, and is used as a reference operating position of the accelerator lever 2 when the threshing lever or the paddy discharging lever is subsequently inserted. Thus, first, the engine speed at the time of throwing the threshing lever or the paddy discharging lever is set to the rated 2600 rpm to give a guide, and then, if the accelerator lever 2 is operated, the position is set to the threshing lever or the padding discharging lever. Since the reference operation position of the accelerator lever 2 when the lever is turned on is set, the setting is easy, and the operation can be quickly and surely performed.

Next, in connection with the present invention, an accelerator control device of a combine which selects four kinds of functions with two switches will be described. As shown in FIG. 5, the accelerator control device includes two switches, an accelerator automatic switch and a vehicle speed switch.
Accelerator-controlled travel control, paddy discharge control,
Four functions are selected: engine constant rotation control and vehicle speed control. Of the four functions, the engine constant rotation control is commonly selected by both an accelerator automatic switch and a vehicle speed switch. As a result, important and basic functions can be selected with either switch, and specific functions are individually selected with each switch, thereby preventing erroneous operations by the operator.

[0032]

As described above, the accelerator control device of the present invention stops the output of the tilt motor when the tilt angle of the accelerator lever does not change after a predetermined time has elapsed after the output of the tilt motor. Therefore, according to the present invention, since the accelerator lever which does not move for some reason is not forcibly moved, the tilting motor can be protected from shortening of life or damage due to overload.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine embodying the present invention.

FIG. 2 is a switch layout diagram of a driver's seat of a combine implementing the present invention.

FIG. 3 is a mechanism diagram of an accelerator lever embodying the present invention.

FIG. 4 is a block diagram of an accelerator control device related to the present invention.

FIG. 5 is a correspondence table of switches for selecting accelerator control and functions.

[Explanation of symbols]

 1 HST lever 2 accelerator lever 21 knob 22 throttle wire 23 reduction gear 24 tilting motor 25 accelerator position sensor 26 throttle lever 3 power steering lever 5 microcomputer 5a input interface 5b output interface 51 engine rotation sensor 52 HST position sensor 53 threshing clutch 54 paddy discharge Clutch 55 Vehicle speed sensor 56 Sensor check switch 57 Accelerator automatic switch 58 Accelerator opening / closing relay 59 HST acceleration / deceleration relay a Crawler b Crawler drive shaft c Cutting section d Feed chain e Grain tank f Auger

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02D 29/00 F02D 29/00 BF Term (Reference) 2B076 AA03 BA07 DC01 DD03 DD04 EA03 EA06 EA08 EA09 EB01 EB03 EC17 EC19 EC21 ED11 2B092 AA01 AA03 AB04 CC02 3D037 EA00 EB01 EB03 EB07 EB12 EB25 3G065 BA04 CA34 CA38 DA05 DA06 DA14 EA01 GA46 JA02 JA09 JA14 KA05 KA13 KA16 KA29 3G093 AA09 AB01 DB03 FA04

Claims (1)

[Claims] 1. A tilt motor for tilting an accelerator lever back and forth, automatic accelerator lever operating means for automatically operating an accelerator lever by outputting a tilt motor, and an accelerator lever tilt angle detecting means for detecting a tilt angle of an accelerator lever. An accelerator control device for a reaping work vehicle, wherein the output of the tilt motor is stopped when the tilt angle of the accelerator lever does not change after a predetermined time has elapsed since the output of the tilt motor.