JPH02295411A - Control device for speed of combine - Google Patents

Abstract

PURPOSE:To accelerate the speed of a combine and improve operation efficiency by carrying out acceleration control at a rate faster than set rate until rate of the combine attains standard rate for operation after means for detecting operation state detects that the combine is kept to reaping operation state. CONSTITUTION:A transmission device 9 for traveling a combine is automatically subjected to transmission operation at a set rate K1 so that load state of an engine E is detected by means S1 for detecting engine load and engine load is maintained to set state. The device is subjected to acceleration control at a rate K2 faster than set rate K1 until rate of the combine attains standard rate for operation after means S0 for detecting operation state detects reaping operation state and thereafter accelerated at the set rate K1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes an engine load detection means for detecting the load state of the engine, and maintains the engine load at a set state based on information of the engine load detection means. The present invention relates to a vehicle speed control device for a combine harvester, which is provided with a vehicle speed control means for automatically changing the speed of a traveling transmission device at a set speed.

[Conventional technology]

The engine load on a combine harvester is mainly a running load and a threshing load. Then, the engine speed changes according to an increase or decrease in engine load.

The threshing load increases or decreases as the amount of grain culm supplied to the threshing device increases or decreases in response to increases or decreases in the reaping speed, that is, the vehicle speed.

Therefore, in order to maintain the engine load at the set state during reaping work, the combine harvester's vehicle speed control device calculates the engine rotation speed (reference rotation speed) corresponding to the engine load and makes the engine rotation speed closer to the reference rotation speed. , the vehicle speed was automatically adjusted.

In other words, when the threshing load decreases and the engine speed becomes higher than the reference speed, the speed is increased, and when the threshing load increases and the engine speed becomes smaller than the reference speed, the speed is reduced. Ta.

By the way, a so-called headland is provided around the farmland, and the combine harvester performs the harvesting operation after making a turn on the headland. In other words, each time one work stroke is completed, the machine turns at the headland and begins the next work stroke.

That is, at the start of each work process, the traveling speed is low. And the engine load is small. Therefore, the engine speed is increased until it reaches the reference speed.

Conventionally, the speed was increased at the start of work at a set speed until the engine speed reached a dead zone of the reference speed.

If the set speed is high, there is a risk of problems such as hunting in the traveling speed.
The set speed was set relatively low.

[Problem to be solved by the invention]

In the above conventional technology, at the start of each work process,
The settling time until the engine load reaches the set running speed becomes longer. As a result, the working time became longer and the working efficiency decreased.

An object of the present invention is to solve the above-mentioned conventional drawbacks and improve work efficiency by speeding up acceleration without impairing control stability.

[Means to solve the problem]

In order to achieve this object, the first characteristic configuration of the vehicle speed control device for a combine harvester according to the present invention includes a work state detection means for detecting whether the combine harvester is in a reaping work state, and a work state detection means for setting a reference speed for work. A speed setting means is provided, and the vehicle speed control means is faster than the set speed from the time when the work state detection means detects that the work state is in the reaping work state until the time when the reference speed for the work is reached. It is configured to perform speed increase control based on the speed.

A second characteristic configuration is that the speed setting means is configured to set the reference speed for the work based on the average vehicle speed during the reaping work.

[For production]

In the combine vehicle speed control device according to the first characteristic configuration,
First, a reference speed for work is set.

This reference speed is generally set to a speed lower than the traveling speed when the engine load is in the set state. Then, at the start of work in each work process, the speed is increased at a speed greater than the set speed until the reference speed is reached.

Thereafter, the speed is increased to the set speed.

In the combine vehicle speed control device according to the second characteristic configuration,
In the first working process, vehicle speed control is performed to increase the speed at the set speed. Then, the reference speed for the work is set based on the average vehicle speed. In other words, the speed increase control is performed at a speed faster than the set speed from the next work stroke until the reference vehicle speed is reached.

〔Effect of the invention〕

In the combine vehicle speed control device according to the first characteristic configuration,
The speed is increased at a speed greater than the set speed until the reference speed is reached, and then the speed is increased at the set speed.
It is possible to shorten the settling time until the engine load reaches the set traveling speed at the start of each work process without causing hunting or the like in the traveling speed. As a result, work efficiency can be improved.

In the combine vehicle speed control device according to the second characteristic configuration,
Since the reference vehicle speed is set based on the average vehicle speed during the reaping operation, it is possible to set the reference vehicle speed according to the driving ground and the situation of the planted grain culm. As a result, vehicle speed control can be adapted to the field conditions.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 3, the combine is equipped with a crawler traveling device (1) and a threshing device (2) on the body (■), and a reaping section (3) and a control section at the front of the body (v). (4) is provided.

The reaping unit (3) includes a triggering device (5) that raises the grain culm in the field, a cutting blade (6) that cuts the stock base of the raised grain culm, and a rear part of the machine while changing the posture of the harvested grain culm to a sideways posture. Each is provided with a conveying device (7) for conveying the threshing toward the side threshing feed chain (8).

Then, at a location on the transport start end side of the transport device (7), a stock sensor (
S0) is provided.

To explain, when the reaping operation starts, the grain whose stock has been cut off by the cutting blade (6) is detected by the stock sensor (
S0), the stock sensor (S0) is turned ON, and as the reaping work is completed, grain supply is stopped and the stock sensor (S0) is turned OFF. become. In other words, this stock sensor (S0) corresponds to the work state detection means.

As shown in FIG. 1, the engine (E) and the crawler traveling device (1) are interlocked and connected via a traveling transmission (9), and the engine (E) and the threshing device (2) are connected to each other via a traveling transmission (9). ) and the handling cylinder (10) are interlocked and connected via a belt tension type threshing clutch (11).

A rotation speed sensor (S1) is provided to detect the rotation speed of the engine (E).

The transmission (9) is interlocked and connected to a manually operated transmission lever (13) via a link mechanism (12). A speed change motor (14) is operatively connected to the link mechanism (12) via a friction type transmission mechanism (15). In other words, while the speed change lever (13) allows manual speed change operation, the speed change motor (
14), the gear can be changed automatically.

A vehicle speed sensor (S3) is provided that detects the traveling speed based on the input rotational speed to the transmission section of the crawler traveling device (1).

Note that (S4) in FIG. 1 is a reset switch for resetting the control operation.

Then, the stock sensor (SO), the rotation speed sensor (
A control device (H) using a microcomputer is provided for automatically adjusting the vehicle speed by operating the speed change motor (14) based on the detection information of the vehicle speed sensor (S,) and the vehicle speed sensor (S3). There is.

In other words, the vehicle speed control means (100) and speed setting means (101) are configured using the control device (H).

To explain the configuration for maintaining the engine load at the set state, the engine speed for reaping work is set by subtracting the set I from the maximum engine speed in the non-reaping work state when the stock sensor (S0) is in the OFF state. is stored as the reference rotation speed.

In the reaping work state, the rotation speed sensor (S1
The speed change motor ( ) is configured to increase the speed when the detected rotation speed of the motor (
■4) is designed to change gears.

In other words, the rotation speed sensor (S1) corresponds to engine load detection means.

To explain the speed change operation by the speed change motor (14), basically, the speed change motor (14) is operated intermittently to change speed at a set speed (K1). However, at the start of each work process, the speed change motor (14) is operated continuously until the travel speed reaches the reference speed (Vs) for work, so that the speed is faster than the set speed (K1). The gear is changed at a speed (K2) (second mode). In addition, the speed (K+
) and (Kz) are set to constant values.

To add an explanation to the setting of the reference speed (Vs) for work, the setting of the reference speed (Vs) for work is as follows:
,) Find the average vehicle speed (Vm) during the reaping operation in the first working stroke after operation. In this case, the reference speed (
Since Vs) is not set, the speed will be increased at the set speed (K1) until the engine load reaches the set running speed (first mode). Then, a value obtained by subtracting a predetermined value (α) from the average vehicle speed (Vm) is set as the reference vehicle speed (Vs).

Next, the operation of the control device (H) will be explained based on the flowchart shown in FIG.

First, it is determined whether a reference speed (Vs) for work has been set. If it is not set, the driving transmission (
9) is the first mode in which the gear is changed at the set speed (K+). In addition, if it is set, a second mode is set in which speed increase control is performed at a speed (K2) faster than the set speed until the reference speed (Vs) is reached at the start of the reaping work.

Note that the setting of the reference speed (Vs) is cleared at the start of the control operation and when the reset switch (S4) is turned on.

To further explain the case of the first mode, it is determined whether or not the reaping work has started based on the signal from the stock origin sensor (S0).

Then, when it is determined that the reaping work has started, the rotation speed sensor (
Based on the information in S1), the driving transmission (9) is set at the set speed (K1) so as to maintain the engine load at the set state.
to automatically shift gears. When the end of work is determined based on the signal from the stock sensor (S0), a value obtained by subtracting a predetermined value (α) from the average vehicle speed (Vm) during work is set as the reference speed (Vs).

To explain the case of the second mode, when it is determined that the mowing operation is in progress, it is determined whether the traveling speed (Vx) at that time is higher than the reference speed (Vs). . If it is large, the traveling transmission (9) is operated to change the speed at the set speed (K1) so as to maintain the engine load at the set state. On the other hand, if it is small,
Until the reference speed (Vs) is reached, the speed is increased at a speed (K2) faster than the set speed.

[Another example]

In the above embodiment, the value obtained by subtracting the predetermined value (α) from the average speed (Vm) during work is set as the standard speed (Vs), but the average speed (Vm) is multiplied by a set constant. The method of setting the reference speed (Vs) can be changed in various ways, such as.

Further, in the above embodiment, the engine load is detected by the rotation speed sensor (S1), but the configuration of the engine load detection means can be changed in various ways, such as by using a torque sensor.

Furthermore, in the above embodiment, the set speed (K+), (
Although the case where Kt) is a constant value is shown, the set speeds (K+) and (Kt) may be changed based on detection information from each sensor, etc.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the vehicle speed control device for a combine harvester according to the present invention, with FIG. 1 being a block diagram of the control configuration, FIG. 2 being a flowchart of control operation, and FIG. 3 being a schematic side view of the combine. (9)...Transmission device for driving, (30)...
...Working state detection means, (S1)...Engine load detection means, (E)...Engine, (Ks)
, (Kt)...Setting speed, (Vs)...
・Reference speed for work, (Vm)...Average speed,
(100)...Vehicle speed control means, (101)...
...Speed setting means.

Claims (1)

[Claims] 1. Engine load detection means (S_1) for detecting the load state of the engine (E);
Based on the information of K_1), the driving transmission (9) is set at the set speed (K_1) to maintain the engine load at the set state.
) A vehicle speed control device for a combine harvester is provided with a vehicle speed control means (100) that automatically performs a speed change operation, and a work state detection means (S_0) that detects whether the combine harvester is in a reaping work state; Speed setting means (101) for setting a reference speed for work is provided, and the vehicle speed control means (
100) is a speed (K_2) faster than the set speed from the time the work state detection means (S_0) detects that the reaping work state is reached until the work reference speed (Vs) is reached. A vehicle speed control device for a combine harvester configured to perform speed increase control. 2. The vehicle speed control device for a combine harvester according to claim 1, wherein the speed setting means (101) sets the reference speed (Vs) for the work based on the average vehicle speed (Vm) during the reaping work. It is composed of