JPH084421B2 - Vehicle speed control system for all culms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is designed to maintain the engine load at a set target load based on the information of the load detection means for detecting the load state of the engine. The present invention relates to a vehicle speed control device for an all-crane throw-in combine, which is provided with vehicle speed control means for automatically operating a traveling transmission.

[Conventional technology]

The vehicle speed control device of this type has a corresponding relationship between the vehicle speed and the engine load, such that the higher the vehicle speed in the combine, the more the amount of grain culm to be processed and the heavier the load on the engine. By automatically adjusting the vehicle speed, the engine load condition can be maintained at the target load.

By the way, in a total culm input type combine harvester, a mowing operation is usually carried out by cutting one part of the root part of the grain stalk and collecting the tip side part of the grain culm by equipping it with a mowing part. However, since all of the cut grain culms are put into the handling room, there is a problem that the amount of grains that can be collected is smaller than the amount of the put grain culms and the treatment efficiency is low. Therefore, by exchanging the upper and lower two places of the root part of the grain culm in the field and replacing it with the upper and lower two-stage cutting unit that collects the tip side part of the grain culm, the stump residue in the field is reduced and handled. It is considered to reduce the amount of grain culm thrown into the chamber to improve the treatment efficiency.

However, conventionally, the control condition in the vehicle speed control has not been automatically switched according to the type of the mowing unit, that is, the state of the grain stalks thrown into the handling room.

[Problems to be Solved by the Invention]

Compared with the case of threshing a long grain culm that cut one part of the plant base, and the case of threshing the short grain culm of the tip side part by cutting two places above and below the plant base part of the grain culm, When threshing grain culms, long grain culms tend to be entangled with each other, so the load tends to increase rapidly, while when threshing short grain culms, the grain culms are not easily entangled with each other, resulting in a rapid increase. Load tends not to increase.

Therefore, when threshing a long grain culm cut from one part of the root part, the target load should be reduced against the maximum load allowed to the engine so that the engine does not stop due to a sudden increase in load. However, when threshing a short grain culm, such an engine stop is unlikely to occur, so that the target load can be set higher.

Therefore, in the case of upper and lower two-step cutting, it is possible to set the target load higher than in the case of single-step cutting to control the vehicle speed, but the target load is set manually according to the type of cutting unit. If so, the operation is troublesome and the setting of the target load may be erroneous.

The present invention has been made in view of the above circumstances,
The purpose thereof is to enable the load condition of the engine to be automatically adjusted appropriately in accordance with the cutting form of the grain culm.

[Means for solving the problem]

A vehicle speed control device for an all-crane throw-in type combine according to the present invention is based on information of a load detection means for detecting a load state of an engine so that the load of the engine is maintained at a set target load. A vehicle speed control means for automatically operating the vehicle is provided, and its characteristic configuration is as follows.

That is, the mowing pretreatment unit for mowing the grain culms in the field, a single-step mowing unit that cuts one point of the root part of the grain culm to collect the tip side part of the grain culm, and the grain stalk of the field It is configured to be replaceable with an upper and lower two-step mowing type cutting unit that cuts the upper and lower two parts of the original part and collects the tip side part of the grain culm, depending on which of the two cutting parts is installed. A target for changing and setting the value of the target load so that the value when the above-mentioned upper and lower two-step mowing unit is attached is larger than that when the above-mentioned one-step mowing unit is attached. The point is that load changing means is provided.

[Work]

As mentioned above, in the case of the upper and lower two-stage cutting method in which the top and bottom parts of the grain culm are cut by cutting the top and bottom two places of the grain basin part, one part of the grain basin part is cut. Since the target load can be set higher than in the case of the one-step cutting type that collects the tip side part of the grain culm, the one-step cutting type cutting is more effective when the upper and lower two-step cutting type cutting section is installed. The target load of the engine is automatically changed so that it becomes larger than when the unit is mounted.

〔The invention's effect〕

Therefore, it is possible to automatically change the target load of the engine so that when the upper and lower two-step mowing section is installed, it becomes larger than when the single-step mowing section is installed. , The load condition of the engine can be properly adjusted automatically according to the cutting form of the grain culm.

〔Example〕

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

As shown in FIG. 2, the all-culm throw-in type combine has a vehicle (V) equipped with a crawler traveling device (1), a boarding maneuvering part (2), and a threshing device (3), and its front part. It comprises a mowing pretreatment section (4) mounted to be movable up and down around a horizontal axis along the lateral direction of the machine body.

The pre-cutting processing unit (4) is a single-step cutting type cutting unit (4A) (see FIG. 2) that cuts one part of the root part of the grain culm in the field to recover the tip side part, and the grain culm. So that both the upper and lower two-step mowing section (4B) (see Fig. 3) that cuts the upper and lower two parts of the mowing part and collects the tip side part can be installed. It can be exchanged.

Explaining the one-step cutting type mowing section (4A),
As shown in FIG. 2, a weeding tool (5) provided at the tip, a reel (6) for scraping the planted grain culm in the field to the rear side of the machine body (V), and a grain culm that has been scraped Clipper type cutting blade (7) for cutting the root of the plant, an auger (8) for receiving the cut grain culm and sending it to the rear of the machine body (V), and a grain culm sent from the auger (8) with the threshing device. (3)
It consists of a feeder (9) that scrapes up and conveys it.

Explaining the two-step mowing section (4B),
As shown in FIG. 3, the weeding tool (5), the raising device (10), the lower cutting blade (7) for cutting off the raised root of the grain culm, and the cut grain culm in the standing posture. A conveying device (11) for nipping and conveying toward the rear, an upper cutting blade (12) for cutting an upper part of the conveyed grain stem from the root side,
An auger (8) that laterally joins the tip side portion of the cut grain culm to the center side of the cutting portion, and a tip side portion of the grain culm sent from the auger (8) is scraped up and conveyed to the threshing device (3). And a feeder (9). Incidentally, among the members constituting the two-step cutting type mowing section (4B), the member having the same function as the one-step cutting type cutting section (4A) is the one-step cutting type cutting section (4A). The same drawing number is attached.

Only the front part of the feeder (9) is exchanged so that the rear part of the feeder (9) can be shared regardless of which of the both mowing parts (4A) and (4B) is used. ing. Then, as shown in FIG. 1, the connectors (13) for connecting the wires for the various sensors and actuators attached to the mowing parts (4A) and (4B) to the machine side are used to connect the two Mowing part (4
It is possible to detect which of A) and (4B) is attached. If the explanation is added, for example, the connector (1
Change the connection state to the connector part on the cutting part side so that the connection state to the specific pin of 3) will be different depending on which of the two cutting parts (4A) and (4B) is attached. Thus, it is possible to automatically detect which reaper is attached by determining the connection state of the connector (13) with respect to a specific pin.

The threshing device (3) is a handling room (A) into which all the cut grain culms transported by the feeder (9) are put.
And a sorting device (B) for sorting the leaked material from the handling room (A).

Then, as shown in FIG. 2 and FIG. 4, whether or not the handling chamber (A) is in the grain culm supply state in the ceiling cover (14) at the grain culm entrance side portion of the handling chamber (A). Contact type grain culm detection sensor (S ₀ ) as grain culm supply state detecting means for detecting
Is installed.

If the description of the grain culm detection sensor (S ₀ ) is added,
A contact piece (16) attached swingably around an axis parallel to the axis of rotation of the handling cylinder (15) so as to come into contact with the object to be treated in the handling chamber (A), and the contact piece ( 16) the handling cylinder (1
A spring (17) for urging the side closer to 5) and a switch (18) that is turned on when the contact piece (16) swings by a set value or more. That is, when the grain culm is supplied to the handling chamber (A), the contact piece (16) contacts the object to be treated by the handling barrel (15) and the switch (18) is turned on, and the grain culm is turned on. It detects that it is in the supply state,
Moreover, when the supply of grain culms to the handling room (A) is stopped and the switch (18) is turned off, it can be detected that the grain culm is not supplied. However, although not described in detail, the contact piece (16) is brought into intermittent contact with the grain culm, so that the switch (18) is continuously in the OFF state for a set time (for example, 2 seconds) or more. In this case, it is determined that the supply is not in progress.

And, as will be described in detail later, while the grain culm detection sensor (S ₀ ) is detecting that it is in the grain culm supply state,
The vehicle speed is automatically adjusted so that the load of the engine (E) is maintained at the target load.

Next, a configuration for changing and adjusting the vehicle speed will be described.

As shown in FIG. 1, the output of the engine (E) is transmitted to the handling cylinder (15) through a belt tension type threshing clutch (19) by a belt, and a hydraulic continuously variable transmission is used as a transmission. A belt is transmitted to the transmission (20), and the crawler traveling device (1) is driven by the output of the transmission (20).

A manually operated speed change lever (21) provided in the boarding control section (2) and the speed change device (20) are interlockingly connected, and a speed change is performed as an actuator for operating the speed change device (20). An electric motor (M) is interlockingly connected to the transmission (20) via a friction type transmission mechanism (22) so as to prioritize the speed change by the speed change lever (21). Further, the engine (E) is additionally provided with a rotation speed sensor (S ₁ ) as load detecting means for detecting the load state thereof based on the rotation speed. That is, the engine (E) decreases in rotation speed as the load increases. Therefore, the vehicle speed control is performed by controlling the speed change electric motor (M) based on the information of the rotation speed sensor (S ₁ ). I am trying to do.

And a control device using a microcomputer (23)
Is provided, and which of the grain culm detection sensor (S ₀ ), the rotation speed sensor (S ₁ ), and the reaper (4A), (4B) is attached to the control device (23) thereof. Each of the signals from the connector (13) for detecting is connected.
In the figure, (S ₂ ) is a threshing switch that detects whether the threshing clutch (19) is in the engaged state or the disengaged state.

That is, by using the control device (23), a rotation speed sensor as a load detecting means for detecting the load state of the engine (E) so that the load of the engine (E) is maintained at a set target value. Vehicle speed control means for automatically operating the transmission (20) for traveling is configured based on the information of (S ₁ ).

In addition, when the grain culm detection sensor (S ₀ ) is OFF and the threshing switch (S ₂ ) is ON, the engine (E) is considered to be in an unloaded state and the unloaded state While the engine speed is in, the engine speed (X) detected by the engine speed sensor (S ₁ ) is detected.
Is updated and stored as a reference speed (ST) for determining the magnitude of the engine load.

When the grain culm detection sensor (S ₀ ) is ON and the threshing switch (S ₂ ) is ON, the load acting state on the engine (E) is defined as the load acting state. Is a transmission electric motor (M) so that the deviation between the reference rotation speed (ST) and the detected rotation speed (X) is maintained within a target value range corresponding to the set target value of the engine load. Is operated to automatically operate the transmission (20).

However, as shown in the following table, the value of the target value is based on a signal from the connector (13), and the mowing unit attached is a one-step mowing unit (4A) or a two-step mowing type. Whether it is the reaping unit (4B) is detected, and the height is changed and set according to the corresponding reaping unit. That is, the connector (13) corresponds to the target load changing means for changing and setting the value of the target load according to which of the two mowing parts (4A) and (4B) is attached. become.

When the engine speed (X) of the engine (E) is lower than the changed target value range, it is determined that the load is increased, the deceleration operation is performed, and the engine speed (X) is lower than the target value range. When is increased, it is determined that the load is reduced and the speed is increased. However, in order to recover the engine output faster as the deviation of the detected rotation speed with respect to the target value increases, the operation speed for acceleration / deceleration is adjusted according to the magnitude of the deviation of the detected rotation speed with respect to the target value. I am doing it.

If the target value of the load is further explained, in the case of the two-step cutting type, the length of the collected grain culms becomes shorter than in the case of the one-step cutting type, and as a result, the treatment of the handling room (A) at the same vehicle speed is performed. The amount of grain culm is smaller in the two-step cutting than in the one-step cutting, and the load on the engine (E) is lighter. Therefore, in the case of two-step cutting, even if the target load is set higher than in the case of single-step cutting, the engine (E) will not be overloaded. However, since the target load is set high in the case of two-step cutting, there is a possibility that the recovery thereof will be delayed as compared with the case of single-step cutting when the overload state suddenly occurs. Therefore, in the case of two-step cutting, the operation speed for performing the acceleration / deceleration operation is set higher than that in the case of single-step cutting.

[Another embodiment]

In the above-described embodiment, the case where the load on the engine (E) is detected based on the number of revolutions thereof has been described as an example. However, for example, the load may be detected based on the torque of the engine (E) or the like. Various changes can be made to the specific configuration of each unit, such as the specific configuration of the detection unit.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a vehicle speed control device for an all-cullet throw-in type combine according to the present invention, FIG. 1 is a block diagram of the control configuration, and FIG. 2 is a schematic side view of the combine equipped with a single-step cutting type mowing unit, FIG. 3 is a schematic side view of the two-step mowing type mowing unit, and FIG. 4 is a cutaway front view of the handling room. (E) …… Engine, (S ₁ ) …… Load detection means, (4)
…… Pre-cutting section, (4A) …… Single-step cutting section,
(4B) …… Upper and lower two-step mowing section, (13) …… Target load changing means, (20) …… Traveling transmission, (23) …… Vehicle speed control means.

Claims (1)

[Claims] 1. An engine (E) based on information of a load detecting means (S ₁ ) for detecting a load state of the engine (E).
Speed control means (23) for automatically operating the traveling transmission (20) so that the load of the vehicle is maintained at the set target load.
Is a vehicle speed control device for an all-culm throw-in type combine, in which a cutting pretreatment unit (4) for mowing grain culms in a field cuts one point of the root portion of the grain culm to cut the tip of the grain culm. A single-step mowing unit (4A) that collects the side part, and a two-step upper and lower mowing part that collects the tip side part of the grain culm by cutting two places above and below the plant base of the grain culm in the field ( 4B) is interchangeable, and the target load value is set to the upper and lower two-stage cutting type mowing unit according to which of the two mowing units (4A) and (4B) is mounted. A target load changing means (13) is provided to change and set so that the load when (4B) is attached is larger than that when the one-step mowing section (4A) is attached. Vehicle speed control device for culm-type combine.