JP2707090B2 - Combine speed controller - Google Patents

Description

The present invention relates to a speed control apparatus for a combine, which cuts a grain stalk in a cutting section and moves it in a threshing section for harvesting while moving, for example, by driving a traveling crawler. About.

"Conventional technology" Conventionally, as shown in JP-A-56-5013, a threshing unit and a harvesting unit that continuously perform harvesting work are provided, and the drive speed of the harvesting unit that transmits the power of the engine is steplessly changed. There is a technology for providing a continuously variable cutting speed change mechanism.

"Problems to be Solved by the Invention" In the prior art, the cutting speed change lever is connected to the traveling speed change lever, and the stepless cutting speed change mechanism is switched by 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. Therefore, in place of a cutting speed change mechanism formed by a hydraulic pump and a hydraulic motor which is expensive to manufacture and disassembly and disassemble, when a low-cost cutting speed change mechanism formed by a continuously variable pulley and a belt and easily assembled and disassembled is provided,
Even if the continuously variable pulley is stopped, there is a problem that the shift operation is performed and the belt or the shift operation unit is damaged, and the structure of the mowing shift mechanism is limited to a specific structure, so that manufacturing costs are reduced, and maintenance and repair are performed. There is a problem that it is not possible to easily improve the handling workability.

Further, as shown in Japanese Utility Model Application Laid-Open No. Sho 62-178841, a continuously variable transmission mechanism formed of a continuously variable transmission pulley and a continuously variable transmission belt is provided to transmit the engine driving force to the reaping unit, and the continuously variable transmission mechanism is operated in a shifting operation. There is also a technique in which a mowing speed change motor is provided. 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. Since the speed change of the continuously variable speed veil is performed, there is a problem that it is not easy to prevent an erroneous operation that damages the continuously variable speed mechanism and to improve the durability of the continuously variable speed belt.

Means for Solving the Problems However, the present invention provides a threshing unit and a reaping unit for continuously performing a harvesting operation, and a stepless reaping that continuously changes a driving speed of a reaping unit that transmits power of an engine. A transmission mechanism,
A cutting sensor for detecting the driving speed of the cutting unit; a cutting sensor for detecting the drive of the cutting unit; and a cutting sensor for detecting the drive of the cutting unit. In a combine speed control device for automatically controlling a mowing speed change motor during driving, a speed increasing and deceleration manual switch is connected to a control circuit for connecting each of the sensors and the motor, and the mowing speed changing motor is operated only when the mowing unit is operating. And both automatic control and manual control are performed by the output of the control circuit.

"Operation" Therefore, the harvesting work moving speed is detected and the cutting motor is automatically controlled, and the cutting speed control is performed automatically by switching the gear ratio of the continuously variable pulley and the belt. It is possible to easily reduce the manufacturing cost and improve the handling workability such as maintenance and repair, and to control the reaping speed change motor only when the reaping unit is operating by the output of the control circuit that performs both automatic control and manual control. When the engine is operated, it is possible to easily eliminate inconveniences such as the belt or the shift operation section being damaged due to the manual operation of the continuously variable cutting transmission mechanism when the engine is stopped, thereby damaging the continuously variable cutting transmission mechanism. It is possible to easily prevent erroneous operation and improve durability of the continuously variable transmission belt.

"Example" Hereinafter, an example of the present invention will be described in detail with reference to the drawings. First
The figure is a control circuit diagram, FIG. 2 is a side view of the combine, and FIG. 3 is a plan view thereof. In the figure, (1) is a track frame on which a traveling crawler (2) is mounted, and (3) is the track frame. (1) A machine base to be erected, (4) a threshing unit that stretches a feed chain (5) to the left and incorporates a handling cylinder (6) and a processing cylinder (7), and (8) a cutting blade And a harvesting unit including a grain culm transport mechanism, (9) a straw processing unit facing the end of a straw chain (10), (11) a cab having a driver's seat (12) and a driving operation unit (13). , (14) is an engine room in which the engine (14a) is installed, and (15) is a grain tank for storing the grain from the threshing unit (4), which is configured to continuously perform cutting and threshing work. ing.

Also, in the figure, (16) is a lifting / lowering and steering operation lever for performing a lifting / lowering operation of the reaper (8) and a steering operation by right and left side clutch control, (17) is a traveling main transmission lever, and (18) is a sub transmission lever. , (19) is a reaping clutch lever, and (20) is a threshing clutch lever.

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

Also, as shown in FIGS. 6 and 7, the driving operation unit (13)
A mowing speed change motor (32), which is a speed change operation member, is provided inside the machine inner box (31), and a sector gear (34) constantly meshed with an output gear (33) of the motor (32) is supported. Rod (35) (36), shifting arm (37) (3
8) and the continuously variable cam (30) through the transmission shaft (39)
The continuously variable cam (30) is operated and controlled via the sector gear (34) by forward / reverse control of the motor (32), and the split pulley (26)
Is changed so that the output rotation speed of the belt (28) is changed, and the reaping conveyance speed of the reaping unit (8) is continuously variable.

Also, the gear (34) is linked with the sector gear (34).
A potentiometer-type mowing shift sensor (40) for detecting the rotation angle of the motor (32) is provided, and the mowing shift position by the motor (32) is detected by the sensor (40).

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 a sub-shift position in conjunction with the auxiliary shift lever (18). A change-over switch type auxiliary speed sensor (42);
A pickup-type engine rotation sensor (43) for detecting the number of revolutions of the engine (14a), a pickup-type vehicle speed sensor (44) for detecting the number of revolutions of the traveling crawler (2); A pick-up type cutting speed sensor (45) for detecting a driving speed of the mechanism.

And a mowing transport speed control circuit (46) comprising a microcomputer, wherein the sensors (40) to (45)
Is connected to the control circuit (46), the switch (47) for detecting that the oil pressure of the engine (14a) is rising to an appropriate pressure, and the battery charging operation of the engine (14a) is performed properly. Switch (4
8) and switches (49) (50) that detect clutch engagement operation in conjunction with the mowing and threshing clutch levers (19) and (20)
The switches (47) to (50) are connected to the control circuit (4
6) Connected to.

Also, a cutting speed change motor (32) is connected to the control circuit (46) via an amplifier circuit (51) and a deceleration circuit (52), and the cutting speed is determined based on the vehicle speed detected by each sensor (41) (42). The operation of the speed change motor (32) is controlled, and the mowing unit (8) is controlled.
Is configured to change the mowing transport speed.

Then, as shown in FIG. 8, the relationship between the vehicle speed (x) and the mowing transport speed (y) is shown by a solid line having a gentle inclination angle with respect to the conventional linear linear line (y = x) of the direct proportionality shown by a virtual line. A conventional straight line (y = ax + b), as shown in FIG. 9, is a imaginary line that represents the ratio of the harvesting transport speed (y) to the vehicle speed (x) (y ÷ x). Constant value (z
= A), it is changed as shown by a solid line that is a quadratic curve (z = a / x ² + b), and the reaping conveyance ratio (z) increases in proportion to the low speed change of the vehicle speed (x). Thus, even if the harvesting transport speed (y) is set based on the average harvesting vehicle speed (x = x0), the harvesting transport speed (y) during the low-speed harvesting operation is the minimum speed (main It is configured such that the cutting speed at the time of neutral shift is equal to or higher than the cutting speed of the sub-shift 1st speed.

In FIG. 1, the sensors (43) to (45) and the switches (47) to (50) detect the rotation of the engine (14a) and the driving of the threshing unit (4) and the cutting unit (8). Then, the control circuit (46) determines whether or not the driving speed of the reaping unit (8) is higher than a set value, and the reaping speed change motor (32) can be operated only when the reaping unit (8) is driven. age,
The control operation by the motor (32) is performed.

Further, manual switches (53) and (54) for speed increase and deceleration are connected to the control circuit (46), and the manual switches (53) and (42) are output similarly to the automatic control operation based on the outputs of the sensors (41) and (42) for detecting the vehicle speed. Also in the manual control of (54), the reaping speed change motor (3) is operated only when the reaping unit (8) is driven.
2) It is configured to operate.

Also provided is a select switch (55) for setting a reference value of the cutting transfer speed of the cutting unit (8) changed by the cutting speed change motor (32), and the switch (55) is connected to the control circuit (46); Harvester (8) according to crop conditions
So that the reaping conveyance speed can be selected steplessly.

As is clear from the above, the threshing unit (4) and the harvesting unit (8) for continuously performing the harvesting work are provided, and the drive speed of the harvesting unit (8) for transmitting the power of the engine (14a) is steplessly changed. Continuously variable harvesting speed change mechanism (29) and speed change sensors (41) (4)
2) and 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). A switch (49), which is a reaping sensor for detecting driving, is provided. A speed control device of a combine which automatically controls a reaping speed change motor (32) when the reaping unit (8) is driven is provided.
(42) and the control circuit (46) for connecting the switch (49) and the motor (32) are connected with the manual switches (53) and (54) for speed increase and deceleration, and the reaper (8) is operating. Only the automatic control and the manual control are performed by the output of the control circuit (46) for operating the harvesting speed change motor (32). The harvesting work moving speed is detected and the harvesting motor (32) is detected.
Automatically controls the gear ratios of the continuously variable pulleys (26) and (27) and the belt (28) to automatically control the cutting speed, thereby reducing manufacturing costs and maintaining and repairing compared to hydraulic speed change structures. In addition to improving the workability of handling, etc., the output of the control circuit (46) that performs both automatic control and manual control activates the reaping speed change motor (32) only when the reaping unit (8) is operating. When the engine (14a) is stopped, the continuously variable reaping transmission mechanism (29) is operated to eliminate such a trouble as to damage the belt (28) or the shift operation section. The structure is such that erroneous operation that damages the belt can be prevented, and the durability of the continuously variable transmission belt (28) can be improved.

This embodiment is configured as described above, and the engine (14
Activate a), mowing and threshing clutch lever (19) (2
0), when the harvesting operation is performed while 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 hydraulic pressure and charging action of the engine (14a), and The on / off operation of each of the levers (19) and (20) is detected by each of the switches (47) to (50), the movement of the combine is confirmed by a vehicle speed sensor (44), and the cutting speed sensor (45) is used for cutting. The operation of the section (8) is confirmed, and the control circuit (46) determines that a mowing shift for changing the driving speed of the mowing section (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 the reaping shift position is input from the reaping shift sensor (40). As shown in FIG. 10, the mowing transport speed is calculated based on the vehicle speed, and the sub-shift is performed at a low speed (L1, L2, L
3, L4) and high speeds (H1, H2, H3, H4), the main speed (forward 1, 2, 3, 4) is used to calculate the wake-up speed. The mowing speed change motor (32) rotates forward or reverse according to the stored speed increase or deceleration signal output of the control circuit (46), and the sector gear (34)
And a mowing transmission mechanism (2
9), the harvesting operation is performed while the harvesting transfer speed is changed in conjunction with the vehicle speed.

[Effects of the Invention] As is clear 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) Continuously variable speed change mechanism (29) for continuously changing the drive speed
And a traveling sensor (41) (4)
2) and a cutting speed change pulley (26) (27) forming a continuously variable cutting speed change mechanism (29) and a cutting speed change motor (32) for switching a speed ratio of a belt (28). A harvesting sensor (49) for detecting the speed of the mowing unit (8), wherein the harvesting speed control motor (32) is automatically controlled when the mowing unit (8) is driven, wherein the sensors (41), (42), (49) and the motor A manual control switch (53) (54) for speed increase and deceleration is connected to the control circuit (46) connecting the (32), and the mowing speed change motor (32) is operated only when the mowing part (8) is operating. It is configured to perform both automatic control and manual control by the output of the control circuit (46), and automatically controls the harvesting motor (32) by detecting the harvesting work moving speed,
By automatically changing the gear ratio of the continuously variable pulleys (26) and (27) and the belt (28) to control the cutting speed, it is possible to reduce the manufacturing cost and maintain and repair compared to a hydraulic speed change structure. The reaping speed change motor (32) can be easily operated only when the reaping 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 stepless cutting speed change mechanism (2
9) can be easily operated to prevent troubles such as damage to the belt (28) or the speed change operation portion, and to prevent erroneous operation of damaging the continuously variable cutting speed change mechanism (29) and the continuously variable speed change belt (28). ) Can be easily improved.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram showing an embodiment of the present invention, FIG. 2 is a side view of a combine, FIG. 3 is a plan view of the combine, FIG. 4 and FIG. 7 and 8 are explanatory diagrams of a shift operation member, FIGS. 8 and 9 are shift output diagrams, and FIG.
The figure shows the triggered conveyance output diagram, and FIG. 11 is the flowchart. (4) Threshing unit (8) Cutting unit (14a) Engine (26) (27) Split pulley (28) Belt (29) Cutting transmission mechanism (32) Cutting Speed change motor (41)… Main speed sensor (travel sensor) (42)… Sub speed sensor (travel sensor) (46)… Mowing and transport speed control circuit (49)… Switch (mowing sensor) (53) ( 54) Manual switch

Continuing from the front page (72) Inventor Hirotaka Otsuka 1-32 Chaya-cho, Kita-ku, Osaka, Japan Inside Yan Ma Agricultural Machinery Co., Ltd. (72) Inventor Satoshi Kasoya 1-32, Chaya-cho, Kita-ku, Osaka, Osaka (72) Inventor Makoto Goto 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Mutsumi Machida 428 Enami, Okayama-shi, Okayama Pref.Seirei Industry Co., Ltd. (56) References Japanese Utility Model 1987-617841 (JP, U)

Claims (1)

(57) [Claims] 1. A stepless cutting speed change mechanism for continuously changing a driving speed of a cutting unit for transmitting power of an engine, wherein a threshing unit and a cutting unit for continuously performing a harvesting operation are provided, and a moving speed of the harvesting operation is detected. A cutting sensor that detects the driving of the cutting unit, and a cutting sensor that detects the driving of the cutting unit. In the speed control device of the combine to automatically control, connect a manual switch for speed-up and deceleration to the control circuit that connects the sensors and the motor, only when the mowing unit is operating,
A combine speed control device characterized in that both automatic control and manual control are performed by the output of the control circuit for operating a mowing speed change motor.