JPH06133632A - Combine harvester - Google Patents

Abstract

PURPOSE:To strengthen a tension force of a tension clutch which is a reaping clutch from that in normal operation within a range of car speed '0' to a constant low speed. CONSTITUTION:This combine harvester for synchronizing the car speed with the reaping speed is constructed so as to control the tension force of a tension clutch 36 which is a reaping clutch installed between a PTO output pulley 34 of a transmission 29 and a reaping input pulley 35 of a reaping part based on the car speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine for synchronizing vehicle speed and cutting speed.

[0002]

2. Description of the Related Art Conventionally, turning on and off of power to a mowing section is performed by a tension clutch provided between a PTO output pulley of a mission and a mowing input pulley of a mowing section.

[0003]

[Problems to be Solved by the Invention] Usually, harvesting of lodging culm,
When working on wetlands, the vehicle speed is extremely slowed down, forcing the vehicle to proceed at a low (slow) speed. However, with a combine that synchronizes the mowing speed with the vehicle speed, the mowing speed also drops extremely, and the tension force of the tension clutch (mowing clutch) becomes the tension force during steady work, even though a high load is applied to the mowing section. Because of the setting, belt slip occurred, and it became impossible to convey the cuttings, and the cutting blade stopped.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in the combine for synchronizing the vehicle speed and the mowing speed, the tension force of the tension clutch, which is a mowing clutch provided between the PTO output pulley of the mission and the mowing input pulley of the mowing section, is applied. , By controlling based on the vehicle speed and making the tension force of the tension clutch stronger than the tension force during steady work in the low speed range, it is possible to properly perform the mowing work in the low speed range in the combine that synchronizes the vehicle speed and the mowing speed. It is the one.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a control circuit diagram, FIG. 2 is an overall side view of the combine, and FIG. 3 is a plan view thereof. In the figure, (1) is a track frame equipped with a traveling crawler (2), and (3) is the track frame. (1) Machine frame installed on the top, (4) Threshing section in which the feed chain (5) is stretched on the left side and the handling cylinder (6) and the processing cylinder (7) are built in, (8) is a cutting blade (9) and a grain cutting device (10), etc., a mowing unit, (11) a hydraulic cylinder for moving the mowing unit (8) up and down via an elevating fulcrum cylinder shaft (12), and (13) a straw chain ( 14) A straw processing unit that faces the end, (15) a grain tank that carries the grain from the threshing unit (4) through a fried grain cylinder (16), (1
7) is a discharge auger for discharging the grains in the tank (15) to the outside of the machine, and (18) is a driving operation section (19) and a driver's seat (2).
0) is a driver's cab, and (21) is an engine provided below the driver's seat (20), and is configured to continuously mow grain culms and thresh.

The steering side clutch lever (2
2) is provided in the front column (23), and the main traveling speed change lever (24), the auxiliary travel speed change lever (25), the reaping clutch lever (26) and the threshing clutch lever (2) are provided.
7) is provided on the side column (28).

Further, as shown in FIG. 4, a continuously variable hydraulic transmission (hereinafter referred to as HST) (30) is provided above a mechanical traveling mission (29) for driving the traveling crawler (2), and an input / output pulley (31) is provided. ) (32) and belt (33)
The output of the engine (21) is transmitted to the HST (30) via the HST (30), and the left and right traveling crawlers (2) are driven via the traveling mission (29) by the shift output of the HST (30), and the PTO output pulley (3
4) is provided, and a reaping input pulley (35) is provided at the right end of the cylindrical shaft (12), and the pulleys (34) (35) are provided through a tension clutch (36) which is a reaping clutch and a belt (37). Are connected, and the vehicle speed and the mowing speed are synchronized to drive each part of the mowing section (8).

The main speed change lever (2) is attached to the main speed change shaft (38) provided on the HST (30) via a rod (39).
4) and the sub-transmission lever (25) connected to the sub-transmission shaft (40) provided on the mission (29) via the rod (41).
The PTO output pulley (34) is provided on the auxiliary shift output side of 9), and the reaper (8) is driven via the pulley (34) by the auxiliary shift output of the mission (29).

Furthermore, a reaping clutch motor (42) is provided, and the output of the rotary shaft (43) of the motor (42) is passed through the worm (44) / worm gear (45), the reciprocating link mechanism (46), etc., to the tension clutch arm. (4
7) and the tension clutch (36) at the tip
The tension clutch arm (47) to be mounted is rocked by driving the motor (42) to move the tension clutch (3).
6) The on / off operation of 6) and the tension force adjustment when the tension clutch (36) is engaged are configured.

The cutting clutch lever (26) is turned on when it is turned on and turned off when it is turned off.
6) A mowing switch (48) for detecting the on / off operation, a vehicle speed sensor (49) for detecting the rotation speed of a predetermined rotating shaft in the mission (29), and an angular position of the tension clutch arm (47). And a tension force sensor (50) which is a potentiometer for detecting.

As shown in FIG. 1, a reference tension force setting device (51) for initially setting the tension force of the tension clutch (36) during steady work and an additional tension force for adding to the reference tension force during low speed work are initialized. An additional tension force setting device (52) for setting and a vehicle speed setting device (53) for initializing a vehicle speed for switching the tension force of the tension clutch (36) are provided, and the controller (54) constituted by a microcomputer is provided with the switch. (48), each sensor (49) (50), each setting device (5
1) (52) and (53) are connected, and the motor (42) is connected to the controller (52) via the drive circuit (55). As shown in the flow chart of FIG. When the cutting operation of the reaping clutch lever (26) is detected, the motor (4) is turned on until the value of the tension force sensor (50) becomes "0".
When the cutting clutch “disengagement” operation that drives 2) in the reverse direction is performed and the power transmission to the cutting unit (8) is cut off, while the cutting switch (48) is turned on and the operation of the cutting clutch lever (26) is detected. , Comparing the current vehicle speed with the reference vehicle speed, and if the current vehicle speed is faster than the reference vehicle speed, a cutting clutch “on” operation for driving the motor (42) in the normal direction until the reference tension force is achieved, When the vehicle speed at the present time is lower than the reference vehicle speed, the cutting clutch “ON” operation for driving the motor (42) in the normal direction is performed until the tension force obtained by adding the additional tension force to the reference tension force is performed. To transmit power to (8),
The tension force of the tension clutch (36) at the time of mowing work is configured to be higher than the reference tension force in the medium / high speed range and higher than the reference tension force in the low speed range.

In the above-mentioned mowing clutch control, the tension force in the constant low speed region is increased from the vehicle speed "0", but the tension force is increased (decreased) as the vehicle speed becomes lower (high speed). The purpose can also be achieved by the control, that is, the cutting clutch control that controls the tension force in the entire vehicle speed range.

Further, since the reaping clutch lever (26) simply turns on and off the reaping switch (48), the lever (26) can be operated easily.

[0014]

As is apparent from the above embodiments, the present invention provides a combine in which the vehicle speed and the cutting speed are synchronized,
The tension force of a tension clutch (36), which is a mowing clutch provided between the PTO output pulley (34) of the mission (29) and the mowing input pulley (35) of the mowing unit (8), is configured to be controlled based on the vehicle speed. By making the tension force of the tension clutch (36) stronger than the tension force during steady work in the low speed range,
The present invention has a remarkable effect that the harvesting work can be properly performed in the low speed range in the combine in which the vehicle speed and the harvesting speed are synchronized.

[Brief description of drawings]

FIG. 1 is a control circuit diagram.

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

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

FIG. 4 is a side view of a mission unit.

5 is a flowchart of FIG.

[Explanation of symbols]

 (8) Mowing unit (29) Mission (34) PTO output pulley (35) Mowing input pulley (36) Tension clutch (mowing clutch) (37) Belt (42) Mowing clutch motor

Claims (1)

[Claims] 1. In a combine for synchronizing a vehicle speed and a mowing speed, a tension force of a tension clutch, which is a mowing clutch provided between a PTO output pulley of a mission and a mowing input pulley of a mowing section, is configured to be controlled based on the vehicle speed. Combine that is characterized by doing.