JPH10155333A - Crawler type moving farm machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crawler type moving farm machine useful for a combine or the like for maintaining the rotation number of an engine fixed at all times and improving operation accuracy by controlling engine output corresponding to an engine load at the time of turning a machine body. SOLUTION: Relating to this crawler type moving farm machine equipped with an electronic governor 69 for controlling the rotation of the engine 21, the engine output is controlled by the electronic governor 69 corresponding to the engine load at the time of turning the machine body. Also, it is preferable to perform the deceleration control of a car speed when the maximum output state of the engine 21 continues for more than prescribed time while turning the machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler-type mobile agricultural machine, such as a combine machine, provided with an electronic governor that constantly maintains the engine speed with respect to engine load fluctuations.

[0002]

Normally, the torque curve representing the relationship between the engine speed and the torque (output) is always constant irrespective of the state of the load. When turning, the load becomes high and the engine speed decreases, and in the case of the combine, there arises a problem that threshing performance and the like deteriorate.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a crawler-type mobile agricultural machine equipped with an electronic governor for controlling the rotation of an engine, in which the engine output is controlled by the electronic governor in accordance with the engine load when the aircraft turns. The engine output is increased by the control of the electronic governor. When the load of the rotating engine is high, the engine is safely driven with the upper limit of 90% of the maximum output of the normal engine, for example. % Of the engine output is temporarily increased to the maximum output limit to prevent a decrease in engine speed, and to improve the work accuracy of agricultural machines such as a combine in which work accuracy is reduced by engine rotation such as threshing performance.

Further, when the maximum output state of the engine continues for a predetermined time or more during the turning of the body, the vehicle speed is controlled to be decelerated. When it is not possible,
The load is reduced by reducing the vehicle speed, the engine load and the engine output are appropriately matched, and the working accuracy of the agricultural machine is further improved.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a rotation control circuit diagram of the engine, FIG. 2 is an overall side view of the combine, and FIG.
In the figure, (1) is a track frame on which a traveling crawler (2) is mounted, (3) is a machine frame mounted on the track frame (1), (4) is a feed chain (5) which is stretched to the left and handled. A threshing unit, which is a threshing machine incorporating a body (6) and a processing cylinder (7), (8) is a cutting blade (9) and a grain culm transport mechanism (1)
0) and the like, and a cutting section (11) is a cutting frame (1).
2) a hydraulic cylinder for raising and lowering the reaping unit (8) via
(13) is a straw processing unit that faces the end of the straw chain (14), and (15) is a crushing cylinder (1) for transferring the grains from the threshing unit (4).
6) a grain tank carried in through (6); (17) a discharge auger for carrying out the grains in the tank (15) out of the machine;
8) is a driving cabin having a round steering handle (19) and a driver's seat (20), and (21) is a driving cabin (1).
8) An engine provided below, configured to continuously cut and thresh grain culms.

As shown in FIG. 4, the traveling crawler (2)
The transmission case (22) for driving the vehicle is a traveling hydraulic continuously variable transmission mechanism (25) which is a main transmission mechanism including a pair of a first hydraulic pump (23) and a first hydraulic motor (24).
And a turning hydraulic continuously variable transmission mechanism (28), which is a steering mechanism including a pair of second hydraulic pumps (26) and a second hydraulic motor (27), and an output of the engine (21). The first and second hydraulic pumps (23) (2) are mounted on the shaft (21a).
The input shaft (29) of 6) is interlockingly connected via a transmission belt (30) to drive these hydraulic pumps (23) and (26).

An auxiliary transmission mechanism (32) and a differential mechanism (3) are connected to an output shaft (31) of the first hydraulic motor (24).
3) The driving wheels (34) of the traveling crawler (2) are interlocked via 3). The differential mechanism (33) has a pair of symmetrical planetary gear mechanisms (35) and (35). The planetary gear mechanism (35) includes one sun gear (36) and three planetary gears (3) meshing on the outer periphery of the sun gear (36).
7) and a ring gear (38) meshing with these planetary gears (37).

The planetary gear (37) is rotatably supported on a carrier (41) of a carrier shaft (40) on a coaxial line with a sun gear shaft (39), and sandwiches left and right sun gears (36) and (36). The left and right carriers (41) are opposed to each other, and the ring gear (38) has internal teeth (38a) meshing with each planetary gear (37), and is arranged coaxially with the sun gear shaft (39). The shaft (40) is rotatably supported on the shaft (40).

A traveling hydraulic continuously variable transmission mechanism (2)
5) Controlling the forward / reverse rotation and rotation speed of the first hydraulic motor (24) by adjusting the angle change of the rotary swash plate of the first hydraulic pump (23), and the rotation output of the first hydraulic motor (24). From the transmission gear (42) of the output shaft (31) to each gear (4
3) A center gear (46) fixed to the sun gear shaft (39) via (44) (45) and the auxiliary transmission mechanism (32).
To rotate the sun gear (36). The auxiliary transmission mechanism (32) includes an auxiliary transmission shaft (47) having the gear (45) and a parking brake shaft (49) having a gear (48) meshing with the center gear (46). A pair of low-speed gears (50) and (48) and a medium-speed gear (5) are provided between the shaft (47) and the brake shaft (49).
1) (52) ・ Providing high-speed gears (53) and (54)
It is configured such that the switching between the low speed, the medium speed, and the high speed can be performed by sliding the gear (51) at the center position. is there). The brake shaft (49) is provided with a vehicle speed detection gear (55), and the gear (55)
A vehicle speed sensor (56) for detecting the vehicle speed from the number of revolutions is provided. It should be noted that the cutting P transmitting the rotational force to the cutting unit (8).
The transmission gear (42) of the output shaft (31) is meshed with the PTO input gear (58) of the TO shaft (57).

The first hydraulic motor (24) transmitted to the sun gear shaft (39) via the center gear (46).
Is transmitted to the carrier shaft (40) through the left and right planetary gear mechanisms (35), and the rotation transmitted to the carrier shaft (40) is transmitted to the pair of left and right reduction gears (6).
0) and (61) to the left and right wheel shafts (34a) of the left and right drive wheels (34), respectively.

Further, a hydraulic stepless speed change mechanism for turning (2)
8) The forward / reverse rotation of the second hydraulic motor (27) and the control of the rotation speed are performed by adjusting the angle change of the rotary swash plate of the second hydraulic pump (26), and the output shaft of the second hydraulic motor (27) is controlled. The rotational output is transmitted from the output gear of (62) to the input gears (65a) and (65b) of the turning input shaft (64) via the gear transmission mechanism (63), and the external teeth (3) of the right ring gear (38) are transmitted.
8b) directly and on the left ring gear (3
The external gear (38b) of (8) is transmitted through the reverse gear (67) of the reverse rotation shaft (66) so that the left and right ring gears (38) rotate at the same rotational speed when the second hydraulic motor (27) rotates forward. , The left gear (38) is rotated forward and the right gear (38) is rotated reversely.

When the driving of the second hydraulic pump (23) is stopped and the left and right ring gears (38) are stationary, the driving of the first hydraulic pump (23) is performed. The rotation output from the first hydraulic motor (24) is transmitted from the center gear (46) to the left and right sun gears (36) at the same speed, and the planetary gears (37) and the carrier (41) of the left and right planetary gear mechanism (35) and the reduction gear. Gear (60)
(61) is transmitted to the left and right wheel sets (34a) at the same rotational speed in the same rotational direction in the left and right directions, so that the aircraft travels straight forward and backward. On the other hand, when the drive of the first hydraulic pump (23) for traveling is stopped and the left and right sun gears (36) are stationary and fixed, the second hydraulic pump (26) for turning is driven forward and reverse to rotate the left hydraulic pump (23). The planetary gear mechanism (35) rotates forward or backward,
In addition, the right planetary gear mechanism (35) rotates reversely or forwardly to make the driving direction of the left and right traveling crawlers (2) forward and backward, thereby causing the body to spin turn right or left on the spot.

Further, when the first hydraulic pump (23) for traveling is driven and the second hydraulic pump (26) for turning is driven to turn the machine body left and right, turning with a large turning radius is enabled. The turning radius is determined according to the speed of the left and right traveling crawlers (2).

As shown in FIG. 1, the fuel injection amount of the fuel injection pump (68) of the engine (21) is controlled by an electronic governor (69).
A rack position sensor (71) of an electronic governor (69) for detecting a fuel injection amount from a rack position, and a rotation speed of an engine (21). An electronic governor (6) includes a pickup-type rotation sensor (72) for detecting an operation amount of an accelerator lever or a pedal operated by an operator, and a potentiometer-type accelerator sensor (73) for detecting an operation amount of an accelerator lever or a pedal operated by an operator.
9) is connected to the governor controller (74), and the controller (74) is connected to the vehicle speed controller (7).
5) is connected. Then, the first hydraulic motor (2
4) A vehicle speed sensor (7) for detecting the vehicle speed from the rotation output or the like.
6) and a turning switch (7) provided at the position of the steering handle (19) to detect a turning operation of the handle (19).
7) (the turning operation of the lever is detected when the turning operation is performed by the left and right side clutch levers) and an engine output setting device that controls the rotation output of the engine (21) according to the load factor of the engine (21). (78) and a shift operation motor (79) for adjusting the swash plate angle of the first hydraulic pump (23) together with the main shift lever to shift the traveling speed to the controller (75). 21)
Is configured to perform the rotation control.

Also, as shown in FIG. 5, a mowing for detecting a stalked culm on the upper surface of a raking belt (81) disposed at a rear position of the moving case (80) of the mowing part (8). A detection switch (82) is provided, and the controller (7)
5), the detection switch (82) is connected, and it is determined whether the work is in the harvesting operation (the switch (82) is on) or the work is turning (the switch (82) is off). It is provided so as to be turned off to more reliably detect the turning of the body.

As shown in FIG. 6 and FIG. 7, the output curve representing the relationship with the number of revolutions of the engine (21) is set to be about 90% in the normal mode with respect to the high output mode of the maximum output. Engine that is not related to load fluctuation (2
The constant control (isolonous control (a)) at the rated rotational speed of 1) is performed. When the turning switch (77) and the reaping detection switch (82) detect that the steering wheel (19) is operated and the aircraft turns, the engine at the time when the engine load factor is 70% or less is detected. When the output is maintained and the engine load is 80% or less (between 70% and 80%), the maximum output is 80% of the maximum output, and the engine load is 90% or less (80% and 90%). 90% of the maximum output during
When the engine load ratio is 90% or more, the engine speed is increased to the maximum output (1
00%) to the limit of the high-power mode.
9) (reverse droop control (b)).
The output during the turning of the machine body is increased by an output difference (P) between the normal mode and the normal mode, so that a highly viscous and continuous operation can be performed even in a high load operation such as during the turning.

The control of the electronic governor (69) includes isochronous control for keeping the engine speed constant even when the load fluctuates, and controlling the engine speed in accordance with the degree of load as in the case of the mechanical governor ( When the load increases, the engine speed decreases, and when the load decreases, the engine speed increases.) Droop control and, contrary to this droop control, when the work load approaches the engine output limit, the engine speed is increased by increasing the engine speed. There is an increased reverse droop control, and the output is increased by the reverse droop control when the aircraft turns.

If the engine (21) is driven at the maximum output (100%) for a predetermined time (for example, a very short time such as two seconds) even if the engine load factor does not decrease, the speed change is performed. The vehicle speed reduction control is performed by driving the operation motor (79).
The work accuracy of various working units such as the threshing performance of the threshing unit driven by 1) can be stably maintained.

[0019]

As is apparent from the above embodiment, the present invention provides an electronic governor (6) for controlling the rotation of the engine (21).
In the crawler type mobile agricultural machine equipped with 9), since the engine output is controlled by the electronic governor (69) in accordance with the engine load at the time of turning the body, when the engine (21) with which the body turns is under a high load, it is usually used. Engine (2
For example, while the engine (21) is safely driven with the upper limit of 90% of the maximum output of (1), the engine output is temporarily increased to the maximum output limit of approximately 100%, and the decrease in engine rotation is reduced. By preventing such problems, it is possible to improve the working accuracy of an agricultural machine such as a combine in which the working accuracy is reduced due to engine rotation such as threshing performance.

Further, when the maximum output state of the engine (21) continues for a predetermined time or more during the turning of the body, the vehicle speed is controlled to be reduced.
When it is impossible to cope with the high load only by the control of the electronic governor (69) at the time of the high load of 1), the load can be reduced by reducing the vehicle speed, and the engine load and the engine output can be appropriately matched. The working accuracy of the agricultural machine can be further improved.

[Brief description of the drawings]

FIG. 1 is a rotation control circuit diagram of an engine.

FIG. 2 is an overall side view of the combine.

FIG. 3 is an overall plan view of the combine.

FIG. 4 is an explanatory diagram of a mission drive system.

FIG. 5 is an explanatory side view of the reaper.

FIG. 6 is a flowchart.

FIG. 7 is an output diagram.

[Explanation of symbols]

 (21) Engine (69) Electronic governor

Claims (2)

[Claims] 1. A crawler-type mobile agricultural machine equipped with an electronic governor for controlling rotation of an engine, wherein a crawler-type mobile agricultural machine is provided such that the engine output is controlled by the electronic governor according to the engine load when the aircraft turns. Moving farm machine. 2. The crawler type mobile agricultural machine according to claim 1, wherein the vehicle speed is controlled to be reduced when the maximum output state of the engine continues for a predetermined time or more during the turning of the body.