JP2624400B2 - Combine speed controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine speed control device.

[0002]

2. Description of the Related Art Conventionally, in a vehicle speed control device of a combine, in order to avoid occurrence of engine stall due to an increase in running load when turning on a headland after cutting a field, a manual operation is performed when an operator finishes the cutting operation. The vehicle speed was reduced by the operation. However, in manual deceleration operation,
Not only is it annoying itself, it is easy to forget to operate,
There was also a risk of causing engine stalls due to forgetting to operate
As a technique to improve this point, non-
If an increase in running load is detected in the work state,
Automatically decreases when the vehicle speed is higher than the set speed.
Speed control devices that operate at high speed have been proposed (for example,
See JP-A-2-245115).

[0003]

The object of the invention is to be Solved However, the above-mentioned modified
In good technology, combine harvesters have finished
After changing to the working state, traveling by turning movement on the headland
The load increases and deceleration operation is performed after the increase in load is detected.
Therefore, the deceleration operation tends to be delayed. That
As a result, for example, the vehicle speed when entering a turning operation is relatively high
In the case of
That the risk of instability has not been eliminated
Therefore, further improvement has been desired.

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible for a combine to complete a mowing operation.
Manual deceleration operation after changing to the non-working state.
While increasing the running load when turning on a headland
An object of the present invention is to provide a combined vehicle speed control device capable of more accurately preventing the occurrence of engine stall .

[0005]

SUMMARY OF THE INVENTION A first characteristic configuration of a combine vehicle speed control device according to the present invention comprises a vehicle speed detection unit for detecting a vehicle speed, and a work state detection unit for detecting whether or not a harvesting work state is present. Control means for controlling the operation of the operation actuator of the transmission for traveling, and the control means detects a change from the reaping work state to the non-cutting work state based on the detection information of the work state detecting means. Accordingly, when the vehicle speed detected by the vehicle speed detecting means is higher than the set target vehicle speed, the operation actuator is operated to reduce the speed to the set target vehicle speed.

A second characteristic configuration specifies a preferred specific configuration for implementing the first characteristic configuration, and includes a target vehicle speed adjusting means for changing and adjusting the target vehicle speed. It is in.

[0007]

According to the first feature configuration, if the work state detecting means detects that the working state of the combine has changed from the cutting work state to the non-cutting work state, the vehicle speed detecting means decreases the current vehicle speed to the set target vehicle speed or less. Detect whether or not. When the current vehicle speed is higher than the set target vehicle speed, the control means operates the operation actuator to decelerate the traveling transmission to reduce the speed to the set target vehicle speed.

[0008] According to the second characteristic configuration, the operator can change and adjust the set target vehicle speed to a more appropriate value by the target vehicle speed adjusting means. For example, in wetland conditions where the traveling load during turning is heavy because the crawler traveling device of the combine is likely to sink from the surface of the field, the set target vehicle speed is adjusted to a lower speed side, and conversely, the crawler traveling device of the combine In a dry field condition where the running load during turning does not become heavy because it is difficult to sink from the surface of the field, the set target vehicle speed is adjusted to the high speed side.

[0009]

According to the first feature configuration, the combine is
After the harvesting operation is completed and the state changes to the non-working state,
Before turning, the vehicle speed falls below the target vehicle speed set in advance.
Since the vehicle is being dynamically decelerated, the running load
The engine stalls due to the increased load,
It can be prevented more accurately .

According to the second characteristic configuration, in addition to the effects of the first characteristic configuration, the turning time is improved due to the field conditions and the like.
Sufficient deceleration according to the expected load increase
, While avoiding unnecessarily decelerating to the low speed side, thereby improving work efficiency.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the combine includes a thruster 2 mounted on a body 9 having a pair of right and left crawler traveling devices 1, and a boarding operation section 4 provided at a front portion of the body 9. A mowing unit 3 is provided to be movable up and down. The reaper 3, device 5 causes cause field of grain stalks, causing the cutting blade 6 to cut the strain base cereal stalks, reaper grain stalks threshing machine body rear side while the posture change in the transverse inclination posture feed chain 8 Each of the transporting devices 7 for transporting the paper toward the.

A stock sensor S0 is provided at a position at the start of the conveyance of the conveyance device 7 so as to come into contact with the stock of the grain culm to be conveyed and to be turned ON. If you add the description, along with starting the cutting work, the cereal stalks which are cut strain base at the cutter blade 6 is in contact with the strain based sensors S0, the strain based sensors S0 is activated ON, and As the harvesting operation is completed, the supply of grain culm is stopped and the stock sensor S0 is turned off.
Will work. In other words, is this strain based on sensor S0,
This corresponds to a work state detecting means for detecting whether or not a mowing work state is present .

Next, a control configuration of the combine will be described with reference to FIG. The output of the engine E is transmitted to each of the threshing device 2 and the cutting unit 3 and also transmitted to a continuously variable transmission 10 using hydraulic pressure, and the output of the transmission 10 is used for crawler traveling. The power is transmitted to the mission unit 11 of the device 1. However, although not described in detail, transmission between the components is performed by a belt or the like. A speed sensor S1 for detecting the speed of the engine E is provided, and a vehicle speed detecting means for detecting a vehicle speed V based on the output speed of the transmission 10 transmitted to the input shaft 11A of the transmission unit 11. A vehicle speed sensor S2 is attached to the transmission section 11.

In FIG. 1, reference numeral 12 denotes a lever for manual operation of the transmission 10, and reference numeral 13 denotes an electric motor as an operation actuator of the transmission 10. The manual operation lever 12, the transmission 10 and Are linked via a friction type transmission mechanism 14 to the link mechanism 15. In other words, the gear shift operation can be performed by the manual operation lever 12 and the electric motor 13 in a form in which the manual gear shift operation is prioritized to the gear shift operation by the electric motor 13.

Further, a control device 16 using a microcomputer is provided, to which detection signals of the stock sensor S0, the rotation speed sensor S1, and the vehicle speed sensor S2 are inputted. A control means 100 for controlling the operation of the electric motor 13 by utilizing the control means 100 is configured. Further, a predetermined voltage corresponding to the set target vehicle speed α is input to the control device 16 from a volume 17 as target vehicle speed adjusting means. Then, the control device 16 executes the following deceleration control based on the information from the various sensors described above.

The deceleration control will be described with reference to FIG. First, by detecting that the detection signal of the stock sensor S0 has switched from the ON state to the OFF state, it is detected that the combine has changed from the reaping operation state to the non-rearing operation state. Then, after resetting the deceleration output number counter N for counting the number of deceleration operation outputs to the electric motor 13 (N = 0), whether the current vehicle speed V detected by the vehicle speed sensor S2 is equal to or less than the set target vehicle speed α. If the speed is higher than the set target vehicle speed α, the deceleration operation is performed so as to be equal to or lower than the set target vehicle speed α.
Incidentally, the value of the set target vehicle speed α is usually 0.7 to
It is set to about 0.8 m / sec.

In the deceleration operation, first, a certain time width γ
The deceleration operation ON of (70 ms) is output to the electric motor 13. For this reason, it is determined whether a predetermined time period γ (70 ms) has elapsed since the deceleration operation was turned ON, and if it was determined that the time had elapsed, the deceleration operation was stopped. Next, the stop state of the deceleration operation is continued for a predetermined time T (ms). However,
The time T (ms) of the deceleration OFF timer is variable and is represented by the following equation. T = N · a + b where N is the value of the deceleration output counter, a and b
Is a constant and is determined to be a: 30 ms and b: 50 ms. Therefore, a timer time T (ms) is calculated based on the above equation before the deceleration OFF timer is activated. Therefore, the first time (N
= 0), the time width T of the deceleration OFF timer is 50 ms. After the operation of the deceleration OFF timer is started, the elapse of the timer time T (ms) is judged. Returns to the comparison flow of the current vehicle speed V and the set target vehicle speed α.

In the comparison flow, if the current vehicle speed V is still higher than the set target vehicle speed α, the deceleration operation is repeated until the current vehicle speed V becomes equal to or less than the set target vehicle speed α.
However, in the second and subsequent deceleration operations, the deceleration operation ON time of the constant time width γ (70 ms) is the same, but the time width T of the deceleration OFF timer is expressed by a relational expression T = N
· Since it is expressed by a + b, 80 ms, 110 ms, 14
0 ms,... When the current vehicle speed V becomes equal to or less than the set target vehicle speed α, the deceleration control routine ends.

[0019] In [Other Embodiment] The above embodiment is a working state detection means, is used to strain based sensors S0 for detecting a cutting grain stalks strain origin, in addition to this, for example, provided in the threshing apparatus 2 A grain culm detection sensor may be used.

Further, in the above embodiment, the volume 17 is used as the target vehicle speed adjusting means for changing and adjusting the set target vehicle speed α, but in addition to this, for example, switching to a predetermined stage (3 to 5 stages) is performed. Such a changeover switch may be used. And the specific conditions in the above steps,
For example, if a wet field, usually a dry field, is displayed in the case of three stages, there is an advantage that the operation can be performed easily and surely by not only a skilled person but also a non-skilled person.

The deceleration operation ON output time and the deceleration OFF time in the deceleration operation routine are determined by the transmission 1
It can be set appropriately other than the above values according to the capability of 0 or the like. Further, the deceleration OFF time may not be variable as described above, but may be a fixed time width.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[0023]

[Brief description of the drawings]

FIG. 1 is a block diagram of a control configuration.

FIG. 2 is a schematic side view of the combine.

FIG. 3 is a flowchart of deceleration control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Transmission 13 Operation actuator 17 Target vehicle speed adjusting means 100 Control means α Set target vehicle speed S0 Work state detecting means S2 Vehicle speed detecting means V Vehicle speed

Claims (2)

(57) [Claims] 1. A vehicle speed detecting means (S) for detecting a vehicle speed (V).
2), a work state detecting means (S0) for detecting whether or not a mowing work state is established, and a control means (1) for controlling the operation of the operation actuator (13) of the traveling transmission (10).
00) is provided, and the control means (100) is provided with the work state detecting means (S
0) The vehicle speed (V) detected by the vehicle speed detecting means (S2) is higher than the set target vehicle speed (α) in accordance with the detection of the change from the harvesting operation state to the non-harvesting operation state based on the detection information. In this case, a combine vehicle speed control device configured to operate the operation actuator (13) to reduce the speed to the set target vehicle speed (α). 2. The combine vehicle speed control device according to claim 1, further comprising target vehicle speed adjusting means (17) for changing and adjusting said target vehicle speed (α).