JPH1066435A - Combine - Google Patents

Abstract

(57) [Problem] To reduce manufacturing cost and improve handling workability such as maintenance and repair, etc., and to cut off a speed change motor (3
2) is prevented from operating. A threshing unit (4) for continuously performing a harvesting operation.
And a cutting section (8), and an engine (14a).
Sensor (41) for detecting the moving speed of the harvesting work in a combine provided with a stepless cutting speed change mechanism (29) for continuously changing the driving speed of the cutting unit (8) for transmitting the power of the harvesting operation.
(42), a continuously variable speed pulley (26) (27) forming a continuously variable harvesting speed change mechanism (29) and a harvesting speed change motor (32) for switching the speed ratio of the belt (28) are provided. Mowing speed change motor (32) only when
Is automatically controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester in which a culm is cut by a cutting unit while being moved by a traveling crawler, and the threshing unit is threshed for harvesting.

[0002]

2. Description of the Related Art Conventionally, as shown in JP-A-56-5013, a threshing unit and a cutting unit for continuously performing harvesting work are provided, and the driving speed of a cutting unit for transmitting the power of an engine is steplessly changed. There is a technology for providing a continuously variable cutting speed change mechanism.

[0003]

According to the prior art, the cutting speed change mechanism is switched by connecting the cutting speed change lever to the traveling speed change lever and operating the cutting speed change lever by manual operation of the traveling speed change lever. Even when the mowing unit is stopped, such as when the vehicle is moving or traveling on a road, the mowing shift lever operates to perform the mowing shift. for that reason,
If a low-priced, easy-to-assemble mowing transmission mechanism made of continuously variable pulleys and belts is used instead of a mowing transmission mechanism formed by hydraulic pumps and hydraulic motors that are expensive to manufacture and require Even if the speed change pulley is stopped, there is a problem that the speed change operation is performed and the belt or the speed change operation unit is damaged, the structure of the cutting speed change mechanism is limited to a specific type, the manufacturing cost is reduced, and the handling such as maintenance and repair is performed. There is a problem that workability cannot be easily improved.

Further, as disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-178841, a continuously variable transmission mechanism formed by a continuously variable transmission pulley and a continuously variable transmission belt is provided to transmit the engine driving force to the reaping unit and to provide the continuously variable transmission mechanism. There is also a technique of providing a mowing speed change motor that performs a speed change operation of the motor. However, in the prior art, since the traveling speed is shifted down and the harvesting speed is also shifted down due to the reduction of the threshing load, if the traveling clutch is disengaged during the harvesting operation and the emergency stop is performed, the threshing load is reduced. The cutting speed is shifted down, and when the operation is resumed with the running clutch engaged, the cutting speed is insufficient, and there is a problem in that the raising and unpulling of the uncut culm are performed improperly.

[0005]

The present invention provides a threshing unit and a reaping unit for continuously performing a harvesting operation.
In a combine having a stepless cutting speed change mechanism that continuously changes the driving speed of a cutting unit that transmits the power of an engine,
A sensor that detects the moving speed of the harvesting operation, a continuously variable pulley that forms a continuously variable harvesting transmission mechanism, and a harvesting speed change motor that switches the speed ratio of the belt are provided, and the harvesting speed change motor is automatically activated only when the movement is confirmed by the vehicle speed. It is characterized in that it is configured to control.

[0006]

[Operation] Therefore, the harvesting work moving speed is detected, the harvesting motor is automatically controlled, and the speed ratio of the continuously variable speed pulley and the belt is switched to automatically perform the harvesting speed control, thereby making it possible to reduce the speed compared to a hydraulic speed change structure. This makes it easy to reduce the manufacturing cost and improve the handling workability such as maintenance and repair, and also to automatically control the reaping speed change motor only when the traveling crawler is driven and moving. The cutting speed change motor can be prevented from operating when the emergency stop is performed, the cutting speed before the emergency stop is maintained until the traveling clutch is engaged and the work is resumed, and when the work is resumed, the uncut culm is raised and raised. The scraping operation can be performed properly.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a control circuit diagram, FIG. 2 is a side view of the combine, and FIG. 3 is a plan view thereof, wherein (1) is a track frame on which a traveling crawler (2) is mounted, and (3) is the track frame ( 1) A machine installed on the top, (4) is a threshing unit in which a feed chain (5) is stretched to the left and a handling cylinder (6) and a processing cylinder (7) are built in, (8) is a cutting blade and The harvesting unit equipped with a grain culm transport mechanism, etc. (9) is a straw chain (1)
0) The straw processing unit that faces the end, (11) is the driver's seat (1)
2) and a driver's cab including a driving operation unit (13), (14)
Is the engine room in which the engine (14a) is installed, (1)
Reference numeral 5) denotes a grain tank for storing the grains from the threshing unit (4), which is configured to continuously perform cutting and threshing operations.

Further, in the figure, (16) is a raising / lowering and steering lever for performing a raising / lowering operation of the reaping unit (8) and a steering operation by right and left side clutch control, (17) is a traveling main speed change lever, and (18) is The sub transmission lever, (19) is a mowing clutch lever, and (20) is a threshing clutch lever.

Further, as shown in FIGS. 4 and 5, a transmission shaft (22) is supported on a support shaft (3a) of the machine base (3) via a bearing body (21) to drive the engine (14a). The drive shaft (22) is provided with a mowing drive pulley (23) for transmitting the force, and the mowing drive case (24) of the mowing portion (8) is provided.
To support the cutting input shaft (25). And a cutting speed change mechanism (29) including a pair of split pulleys (26) and (27) and a belt (28), and the transmission shaft (22).
And the split pulley (26) (2)
7), and a continuously variable transmission cam (30) is provided on the split pulley (26) of the transmission shaft (22).

As shown in FIGS. 6 and 7, a mowing speed change motor (32), which is a speed change operation member, is provided inside an inside box (31) of the operation operation portion (13).
The sector gear (3) always meshed with the output gear (33) of (2).
4) and the transmission rods (35) (3)
6), transmission arm (37) (38) and transmission shaft (39)
Through the sector gear (3) to the continuously variable cam (30).
4) The steplessly variable speed cam (30) is operated and controlled by the forward / reverse control of the motor (32) via a sector gear (34) or the like to change the effective diameter of the split pulley (26). Then, the output rotation speed of the belt (28) is changed, and the reaping conveyance speed of the reaping unit (8) is continuously variable. In addition, a potentiometer type cutting speed change sensor (40) for detecting a rotation angle of the gear (34) in conjunction with the sector gear (34) is provided.
Thus, the mowing shift position by the motor (32) is detected.

Further, as shown in FIG. 1, a potentiometer type main shift sensor (41) for detecting a main shift position in conjunction with the main shift lever (17), and an auxiliary shift lever (18).
A change-over switch type sub-speed sensor (42) for detecting a sub-shift position in conjunction with a motor, a pickup type engine speed sensor (43) for detecting the speed of the engine (14a), and a speed of the traveling crawler (2). A pick-up type vehicle speed sensor (44) for detecting, and a pick-up type cutting speed sensor (45) for detecting the driving speed of the cutting blade and the transport mechanism of the cutting unit (8).

A harvesting / conveying speed control circuit (46) constituted by a microcomputer is provided. The sensors (40) to (45) are input-connected to the control circuit (46), and the hydraulic pressure of the engine (14a) is controlled. (47) for detecting that the pressure is rising to an appropriate pressure, a switch (48) for detecting that the battery charging operation of the engine (14a) is being performed properly, and a reaping and threshing clutch lever (19). And (20), switches (49) and (50) for detecting a clutch engagement operation are provided, and the switches (47) to (50) are connected to the control circuit (46).

The speed increasing circuit (51) and the speed reducing circuit (5)
2) A cutting speed change motor (32) is output-connected to the control circuit (46) via the control circuit (46), and based on the vehicle speed detected by each sensor (41) (42), the cutting speed change motor (32) is connected.
Is operated to change the reaping conveyance speed of the reaping section (8).

As shown in FIG. 8, the relationship between the vehicle speed (x) and the mowing transport speed (y) is represented by a solid line having a gentle slope and a linear line having a gentle inclination angle. On the other hand, as shown in FIG. 9, the cutting transfer ratio (z), which is the ratio of the cutting transfer speed (y) to the vehicle speed (x), is indicated by a solid line that is a quadratic curve with respect to a conventional constant value indicated by a virtual line. The harvesting transport ratio (z) increases in proportion to the low speed change of the vehicle speed (x), and the harvest transport speed (y) is set based on the average harvesting vehicle speed (x0). Even in this case, the mowing transport speed (y) during the low-speed harvesting operation is maintained at a speed higher than the minimum speed required for mowing transport (the mowing speed when the main shift is neutral = the mowing speed at the sub-shift 1st speed). I have.

Further, in FIG. 1, each sensor (43)-
(45) and rotation of the engine (14a) by means of the switches (47) to (50), the threshing unit (4) and the cutting unit (8)
The control circuit (46) determines whether or not the driving speed of the reaping unit (8) is equal to or higher than a set value, and only when the reaping unit (8) is driven, (32) is made operable, and the control operation by the motor (32) is performed.

Further, a manual switch (5
3) (54) is connected to the control circuit (46), and the manual control of the manual switches (53) and (54) is performed similarly to the automatic control operation by the output of the sensors (41) and (42) for detecting the vehicle speed. The mowing speed change motor (32) can be operated only when the mowing part (8) is driven.

A select switch (55) is provided for setting a reference value of a reaping conveyance speed of the reaping section (8) which is changed by the reaping speed change motor (32).
Is connected to the control circuit (46) so that the harvesting / conveying speed of the mowing unit (8) can be selected in a stepless manner according to crop conditions and the like.

As is apparent from the above, the threshing unit (4) and the reaping unit (8) for continuously performing the harvesting operation are provided, and the driving speed of the reaping unit (8) for transmitting the power of the engine (14a) is reduced. Stepless harvesting speed change mechanism (29) changing to stages
, A speed change sensor (41) (42) for detecting the moving speed of the harvesting operation, and a continuously variable speed pulley (26) (27) forming a continuously variable harvesting speed change mechanism (29).
And a mowing speed change motor (32) for switching the speed ratio of the belt (28), and automatically controls the mowing speed changing motor (32) only when the movement is confirmed by the vehicle speed. The motor (32) is automatically controlled, and the continuously variable pulleys (26) (27) and the belt (2) are controlled.
8) The gear ratio control is automatically performed by switching the gear ratio of
Compared with the hydraulic transmission structure etc., it can reduce the manufacturing cost and improve the handling workability such as maintenance and repair, etc.
The cutting speed change motor (32) is automatically controlled only when the traveling crawler (2) is driven and moving. For example, when the running clutch is disengaged and emergency stop is performed, the operation of the cutting speed change motor (32) is controlled. Therefore, the mowing speed before the emergency stop is maintained until the operation is resumed by engaging the traveling clutch, and when the operation is resumed, the raising and the scraping operation of the uncut moist culm are performed properly.

This embodiment is constructed as described above, in which the engine (14a) is operated, the cutting and threshing clutch levers (19) and (20) are turned on, and the harvesting operation is performed by moving in the field. As shown in FIG. 11, the presence or absence of rotation is detected by the engine rotation sensor (43), and the engine (14) is detected.
a) Hydraulic pressure and charging action, and each of the levers (19)
The on operation of (20) is detected by the switches (47) to (50), the movement of the combine is confirmed by the vehicle speed sensor (44), and the harvesting speed sensor (4) is detected.
The operation of the reaping unit (8) is confirmed by 5), and the control circuit (46) determines that the reaping shift for changing the driving speed of the reaping unit (8) is possible.

The main speed change position is input from the main speed change sensor (41) and the sub speed change position is input from the sub speed change sensor (42) to calculate the vehicle speed. And the harvesting transport speed is calculated based on the vehicle speed, as shown in FIG. 10, and when the sub speed is low (L1, L2, L3, L4) and high (H
1, H2, H3, H4) and the main speed change (forward 1,
The raising speed is calculated by the combination with (2, 3, 4), and the control circuit (4) storing this data in advance is used.
The mowing speed change motor (3)
2) operates forward or reverse to control the operation of the mowing transmission mechanism (29) via the sector gear (34) and the continuously variable cam (30), and to change the mowing transport speed in conjunction with the vehicle speed. Harvesting work.

[0021]

As is apparent from the above embodiments, the present invention is provided with a threshing unit (4) and a reaping unit (8) for continuously performing a harvesting operation, and a reaping unit (4) for transmitting the power of the engine (14a). 8) a combiner provided with a stepless harvesting speed change mechanism (29) for changing the drive speed steplessly; sensors (41) and (42) for detecting the moving speed of the harvesting operation;
A continuously variable pulley (26) (27) forming a continuously variable cutting mechanism (29) and a cutting speed change motor (32) for switching the speed ratio of the belt (28) are provided, and cutting is performed only when the movement is confirmed by the vehicle speed. The speed change motor (32) is configured to be automatically controlled, and the harvesting work moving speed is detected to automatically control the harvesting motor (32) to control the continuously variable speed pulleys (26) (27) and the belt (28). By automatically changing the gear ratio to perform the mowing shift control, it is possible to easily reduce the manufacturing cost and improve the handling workability such as maintenance and repair as compared with a hydraulic shifting structure and the like. 2) The mowing speed change motor (32) is automatically controlled only when the mowing speed change motor (32) is driven and moving. Can be prevented from being operated, and the mowing speed before the emergency stop is maintained until the work is restarted by putting the traveling clutch on, so that when the work is resumed, the uncut moist culm can be properly raised and raked. Things.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram showing one embodiment of the present invention.

FIG. 2 is a side view of the combine.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory diagram of a transmission mechanism.

FIG. 5 is an explanatory view of the same.

FIG. 6 is an explanatory view of a speed change operation member.

FIG. 7 is an explanatory view of the same.

FIG. 8 is a shift output diagram.

FIG. 9 is a shift output diagram.

FIG. 10 is a diagram showing a triggered conveyance output line.

FIG. 11 is a flowchart.

[Explanation of symbols]

 (4) Threshing unit (8) Cutting unit (14a) Engine (26) (27) Continuously variable speed pulley (28) Belt (29) Cutting transmission mechanism (32) Cutting transmission motor (41) Main transmission sensor (42) Sub Shift sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirotaka Otsuka 1-32 Chayacho, Kita-ku, Osaka Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Satoshi Kasoya 1-32 Chayacho, Kita-ku, Osaka-shi Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Makoto Goto 1-32 Chayacho, Kita-ku, Osaka-shi Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Mutsumi Machida 428 Enami, Okayama-shi, Okayama Pref.

Claims (1)

[Claims] 1. A combine harvester comprising: a threshing unit and a harvesting unit for continuously performing a harvesting operation; and a stepless harvesting transmission mechanism for continuously changing a drive speed of a harvesting unit for transmitting power of an engine. There is provided a sensor for detecting a moving speed, a cutting speed change motor for switching a speed ratio of a continuously variable pulley and a belt forming a stepless cutting speed change mechanism, and the cutting speed change motor is automatically controlled only when the movement is confirmed by the vehicle speed. A combine speed control device, characterized in that: