JP2001186810A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wrong operation damaging a stepless reaping speed change mechanism and to improve durability of stepless speed change belt. SOLUTION: In a velocity control apparatus of combine harvester which is equipped with a threshing part (4) and a reaping part (8) for continuously carrying out harvest operation and a reaping speed change motor (32) for changing change gear ratios of stepless speed change pulleys (26) and (27) and a belt (28) for changing the driving speed of the reaping part (8) for transmitting power of an engine (14a) in a stepless manner and automatically controls the reaping speed change motor (32) in the drive of the reaping part (8), the apparatus is equipped with a control circuit (46) for selecting a crop condition.

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 structure, 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, a tension pulley is pressed against the continuously variable transmission belt, a cutting speed change lever is connected to an arm on which the pulley is mounted via a wire, and a cutting speed change motor is connected via a spiral rod between the levers. Therefore, the operation of the mowing speed change motor is prohibited by stopping the engine, but even when the engine is stopped, the tension pulley is operated by the operation of the mowing speed change lever and the continuously variable speed pulley is stopped. When the speed of the continuously variable transmission belt is changed, there is a problem that it is not easy to prevent an erroneous operation that damages the continuously variable transmission mechanism and to improve the durability of the continuously variable transmission belt.

[0005]

The present invention provides a threshing unit and a reaping unit for continuously performing a harvesting operation.
A continuously variable pulley that continuously changes the drive speed of a reaping unit that transmits the power of an engine and a reaping speed change motor that switches a speed ratio of a belt, and a combine speed control device that automatically controls the reaping speed motor when the reaping unit is driven. , Provided with a control circuit for selecting crop conditions, automatically controls the harvesting motor according to the harvest work moving speed and crop conditions,
By automatically changing the gear ratio of the continuously variable pulley and belt to control the gear change, the manufacturing cost can be reduced compared to a hydraulic gear structure, etc., the handling workability such as maintenance and repair can be improved, and the function of the gear change control can be achieved. Improvement can be easily achieved.

[0006]

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.

In the drawing, (16) is a lifting / lowering and steering operation lever for raising / lowering the reaping unit (8) and performing a steering operation by left and right side clutch control, (17) is a traveling main speed change lever, and (18) Denotes a sub speed change lever, (19) denotes a mowing clutch lever, and (20) denotes 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 (21) to drive the engine (14a). A cutting drive pulley (23) for transmitting a force is provided on the transmission shaft (22), and a cutting drive case (24) of the cutting unit (8).
To support the cutting input shaft (25). A cutting speed change mechanism (29) including a pair of split pulleys (26) and (27) and a belt (28);
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) as a speed change operation member is provided inside a machine side 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.

A potentiometer type cutting speed change sensor (40) for detecting a rotation angle of the gear (34) is provided in conjunction with the sector gear (34), and the cutting by the motor (32) is performed by the sensor (40). It is configured to detect a shift position.

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 harvesting transfer ratio, which is the ratio of the harvesting transfer speed to the vehicle speed (cutting transfer speed / vehicle speed), and the vehicle speed is expressed by a quadratic curve with respect to a conventional constant value indicated by a virtual line. As shown by the solid line, the harvesting transport ratio changes greatly when the vehicle speed is low, and even if the harvesting transport speed is set based on the average harvesting vehicle speed, the In comparison, the change in the harvesting transfer speed during the low-speed traveling harvesting operation is reduced with respect to the vehicle speed so that the minimum speed required for the cutting transfer (the cutting speed when the main shift is neutral = the auxiliary shift 1).
(High cutting speed).

Further, in FIG. 1, each sensor (43)
(45) and the switches (47) to (50) detect the rotation of the engine (14a) and the driving of the threshing unit (4) and the reaping unit (8), and the driving speed of the reaping unit (8) is determined. The control circuit (46) determines whether or not the setting is equal to or more than the setting, and enables the mowing speed change motor (32) only when the mowing unit (8) is driven. It is configured to be 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. Continuously variable speed pulley (26) that changes to stages
(27) A harvesting speed change motor (32) for switching the speed ratio of the belt (28) is provided. A speed increase / deceleration manual switch (53) / (54) is connected to a select switch (55) for selecting a speed and a control circuit (46) for connecting the motor (32). Only at that time, both the automatic control and the manual control are performed by the output of the control circuit (46) for operating the mowing transmission motor (32). Then, based on the harvesting operation moving speed and the harvesting speed selected according to the crop condition, the harvesting motor (3
2) automatic control of the speed of the continuously variable pulleys (26) (27) and the belt (28) to automatically control the reaping shift by reducing the manufacturing cost and maintenance compared to a hydraulic shift structure, etc. In addition to the improvement of handling workability such as repairing and the like, and the improvement of the function of the cutting shift control, the cutting is performed only when the cutting unit (8) is operating by the output of the control circuit (46) which performs both automatic control and manual control. When the engine (14a) is stopped, the cutting operation is performed by a manual operation so that the belt (28) or the shift operation unit is not damaged. 29) To prevent an erroneous operation that damages 29) and to improve the durability of the continuously variable transmission belt (28).

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. 10, 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 vehicle speed is calculated by inputting the main shift position from the main shift sensor (41) and the sub-shift position from the sub-shift sensor (42), and calculating the vehicle speed from the reaper shift sensor (40). And the harvesting transport speed is calculated based on the vehicle speed, as shown in FIG. 9, and when the sub-shift 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.
6) 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. However, the harvesting work is performed.

[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 continuously variable speed pulley (26) (27) for continuously changing the drive speed of (8) and a mowing speed change motor (32) for changing the speed ratio of the belt (28); In the combine speed control device for automatically controlling (32), a control circuit (46) for selecting a crop condition is provided. Speed change pulley (26) (27) and belt (2)
8) By automatically changing the gear ratio in the cutting gear shift control, it is possible to reduce the manufacturing cost, improve the workability such as maintenance and repair, and improve the function of the cutting gear shift control, etc., as compared with the hydraulic shift structure. It can be aimed at.

[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 diagram showing a triggered conveyance output diagram.

FIG. 10 is a flowchart.

[Explanation of symbols]

 (4) Threshing section (8) Cutting section (14a) Engine (26) (27) Split pulley (28) Belt (32) Cutting speed change motor (46) Cutting transfer speed control circuit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hideyuki Watanabe 1-32 Chayacho, Kita-ku, Osaka-shi Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Satoshi Kasuya 1-32 Chayamachi, Kita-ku, Osaka-shi Inside Yanmar Agricultural Machinery Co., Ltd. Person Mutsumi Machida 428 Enami, Okayama City, Okayama Pref.

Claims (1)

[Claims] The present invention provides a threshing unit and a reaping unit for continuously performing a harvesting operation, and a continuously variable pulley for continuously changing a drive speed of a reaping unit for transmitting power of an engine. A combine speed control device for automatically controlling a cutting speed change motor when a cutting unit is driven, the control device for selecting a crop condition being provided.