JP2944356B2 - Combine accelerator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically controlling an accelerator of an engine mounted on a combine.

[0002]

2. Description of the Related Art An accelerator device of a combine has a structure which can be arbitrarily adjusted and fixed by a hand accelerator lever, and is generally set to a high speed position during a heavy load operation.

However, if the accelerator device is set at a high speed during a light load when the harvesting operation is not being performed, fuel is wasted. Therefore, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 60-128822, when the traveling clutch is disengaged in a state in which the work clutch is disengaged, the engine speed drops to the set low-speed rotation. It has been proposed to control the accelerator device so that the engine speed does not decrease even when the traveling clutch is disengaged.

[0004]

According to the above-mentioned conventional structure, the accelerator down control is automatically performed when the traveling clutch is disengaged and the vehicle is stopped while traveling outside the field with the accelerator device set at a high speed. However,
Even while harvesting in the field, disengage the work clutch, and
There is also a case where running is stopped, and in such a case, the accelerator device is automatically lowered even though work is being performed, and when the harvesting work traveling is resumed, the accelerator up operation must be performed again. Is expected to be bothersome.

[0005] For example, in a combine, harvested grains are stored and collected in a tank or collected and bagged.
Then, when the tank is full or a full bag of grain is accumulated, the machine is moved to the edge of the ridge, and the work of discharging the grain accumulated in the tank and the grain packed in the bag from the machine is performed. In this case, the harvesting work is stopped by disengaging the work clutch, and the aircraft is stopped by disengaging the traveling clutch. However, according to the conventional structure, the accelerator down control is automatically performed even in such a case. When the harvesting operation is resumed after the discharge of the grains, the accelerator-up operation has to be performed again.

The present invention has been made in view of such a point, and enables appropriate accelerator control based on a rational judgment taking into account not only the working state but also the traveling shift state. The purpose is to:

[0007]

In order to achieve the above object, the present invention is characterized in that both the threshing clutch and the mowing clutch are in the "clutch disengaged" state and the traveling auxiliary transmission is in the high speed state or the neutral state. And a detecting means for detecting that the main transmission for traveling is in a neutral state, and a deceleration actuator for forcibly moving the accelerator device to a predetermined low-speed position based on the detection. The operation and effect are as follows.

[0008]

When the vehicle travels back and forth to the field, the threshing clutch and the mowing clutch are both set to the "clutch disengaged" state, and the auxiliary transmission for traveling is often set to the high speed state. With the device in neutral,
If the aircraft is stopped for a certain period of time with the engine running, the accelerator device is automatically decelerated to a predetermined low speed position. In this case, when the vehicle is temporarily stopped within a certain period of time, traveling can be resumed in the previously set high accelerator state without automatic deceleration of the accelerator device.

When the vehicle is stopped with the engine running, the traveling main transmission is set to the neutral state, and the auxiliary transmission is set to the neutral state just in case. Is automatically decelerated to a predetermined low speed position.

[0010] Further, during a mowing operation with the threshing clutch and the mowing clutch in the "clutch-engaged" state, automatic deceleration control of the accelerator device is performed even if the machine body is stopped by running shifts (main shift and sub shift). Never. At this time, since the stop time during the work is generally relatively short, fuel consumption during this time is not a problem.

[0011] Further, during harvesting work in the field, the vehicle does not travel at high speed, and the auxiliary sub-transmission for traveling is switched to the low-speed position and held, so that at this time the accelerator device is operated regardless of other conditions. Is not performed. Therefore, during the mowing operation, both the threshing clutch and the mowing clutch are set to the "clutch disengaged" state in order to discharge the collected kernels on the ridge side, and the main transmission is set to the neutral state to stop the accelerator even when the machine is stopped. The device is kept in the high-speed setting state.

[0012]

Therefore, according to the present invention, by detecting the selection state of the sub-transmission for traveling, it is determined whether or not a mowing operation is to be performed, and it is determined that the traveling state is outside the field. Then, when the aircraft stops, the accelerator deceleration control is performed to suppress fuel waste, and when it is determined that the mowing operation is being performed, the accelerator deceleration control is rather stopped when the aircraft is stopped, so that the next operation can be started. This eliminates the trouble of performing the accelerator increasing operation again, and can be used conveniently and practically.

[0013]

FIG. 3 shows the front of a self-contained combine. This combine is a pair of left and right crawler traveling devices 1
A cutting unit 5 having a raising device 2, a cutting blade 3, a cutting grain culm conveying device 4, and the like is connected to a front portion of the traveling body provided with a swingable up and down centering on a fulcrum P. And a threshing device 6, an engine 7, a control unit 8, and the like.

FIG. 1 shows the transmission system of the combine. The output of the engine 7 is branched into two systems, one of which is transmitted to a threshing device 6 via a threshing clutch 10 and the other of which is constituted by a hydraulic continuously variable transmission (HST). The transmission is transmitted to the traveling mission 12 through the main transmission 11 and transmitted to the left and right crawler traveling devices 1 through the gear type auxiliary transmission 13 that performs three-speed shifting. A part of the output of the main transmission 11 is supplied to the reaping unit 5 via the reaping clutch 14 so that the running speed and the reaping unit driving speed are synchronized.

An accelerator device 15 provided in the engine 7
Of the speed control lever 15a is returned to the idling position a, and the hand accelerator lever 16 linked to the speed control lever 15a is arranged on the control unit so that the friction holding mechanism 17 can hold the friction at an arbitrary operation position. I have.

As shown in FIG. 2, the friction holding mechanism 17 is configured such that when the solenoid 18 is energized, the friction plate 17a is attracted against the spring 17b and the friction holding action is released. The releasing operation of the friction holding function causes the hand accelerator lever 16 to return to the idling position a by the urging action of the speed adjusting lever 15a.

The operation of the solenoid 18 as an actuator for returning the hand accelerator lever 16 to the idling position a is controlled via the control device 20 as follows. That is, the switch S1 for detecting that the main transmission lever 21 for operating the main transmission 11 is at the neutral position N, and the sub transmission lever 22 for operating the auxiliary transmission 13 are moved at the high speed position h and the neutral position n for traveling. Switches S2 and S3 for detecting that the threshing clutch 1
A switch S4 for detecting that the operating lever 23 is in the "clutch disengagement position" 0FF,
The switch S5 for detecting that the operating lever 24 is at the "clutch disengaged position" 0FF is connected to the control device 20.

As shown in FIG. 1, the switch S1 detects that the main shift lever 21 is at the neutral position N, and the sub shift lever 22 is at the high speed position h or the neutral position n for traveling. When the switch S2 or S3 detects that the threshing clutch bar 23 and the mowing clutch lever 24 are both at the "clutch disengagement position" 0FF, the switches S4 and S5 detect that
After a certain time (several seconds to several tens of seconds), the solenoid 18 is energized.

Accordingly, when the threshing clutch 10 and the mowing clutch 14 are both in the "clutch disengaged" state and the sub transmission 13 is in a high speed state for traveling traveling, the main transmission is performed while the engine 7 in the high accelerator set state is running. Apparatus 1
When the aircraft is stopped for a certain period of time with 1 being in the neutral state, the holding function of the hand accelerator lever 16 is released by the energization of the solenoid 18 as described above, and the accelerator device 15 is released.
Is automatically decelerated to the idling position a. In this case, the automatic deceleration of the accelerator device 15 is not performed when the vehicle is temporarily stopped within a predetermined time.

When the vehicle is stopped with the engine 7 running, the main transmission 11 is set to the neutral state, and the auxiliary transmission 13 is set to the neutral state just in case. 15 automatically decelerates to the idling position a.

In the mowing operation with the threshing clutch 10 and the mowing clutch 14 in the "clutch-engaged" state, the automatic deceleration control of the accelerator device 15 is performed regardless of the traveling speed (main speed and sub speed). Is not done.

When the sub-transmission 13 is switched to the standard low-speed position m for cutting or the low-speed position 1 for falling cutting, the automatic deceleration control of the accelerator device 15 is not performed.

That is, a list of the above operations is as shown in FIG.

[Alternative Embodiment] An actuator 18 in which the accelerator device 15 is automatically decelerated
As an example, an electric motor that forcibly moves the hand-accelerated lever 16 that has been held in friction against a frictional force to a predetermined low-speed position can be used.

Further, the predetermined low-speed position when the automatic deceleration control is performed may be set arbitrarily in addition to the idling position.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

Fig. 1 Transmission system diagram of combine

FIG. 2 is a longitudinal sectional front view of a friction holding mechanism for fixing an accelerator.

FIG. 3 is a side view showing a front part of a self-removing combine.

FIG. 4 is an explanatory diagram of operation.

[Explanation of symbols]

 Reference Signs List 10 threshing clutch 11 main transmission 13 auxiliary transmission 14 harvesting clutch 15 accelerator device 18 deceleration actuator a low speed position

Claims (1)

(57) [Claims] 1. A threshing clutch (10) and a mowing clutch (14) are both in a "clutch disengaged" state, a traveling auxiliary transmission (13) is in a high-speed state or a neutral state, and Detecting means for detecting that the transmission (11) is in a neutral state;
An accelerator control device of a combine equipped with a deceleration actuator (18) for forcibly moving an accelerator device (15) to a predetermined low-speed position (a) after a predetermined time.