JPH10295153A - Horizontal controller of combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a horizontal controller by which the malfunction of horizontal control owing to rotation centrifugal force, etc., is prevented and horizontal control and cutting precision are improved by providing a horizontal control inhibiting means for inhibiting horizontal control when a cutting part is elevated till fixed upper limit height. SOLUTION: A horizontal control means for keeping a machine body horizontal is provided and the horizontal control inhibiting means for inhibiting horizontal control when the cutting part is elevated to fixed upper limit height is provided. It is favorable that an inhibiting releasing means for releasing the inhibition of horizontal control when the cutting part is lowered to fixed lower limit height is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine horizontal control device for maintaining a horizontal level of a combine body by supporting the left and right sides of the combine body on a traveling portion such as a crawler so that the height of the combine body can be adjusted.

[0002]

In the conventional turning operation of the fuselage with the side clutch disengaged, the horizontal control is normally prohibited to prevent a malfunction of the horizontal control due to the centrifugal force of the fuselage. I have. However, there is an inconvenience that horizontal control is not performed even when the work is performed while the side clutch is disengaged in wet fields or deformed fields.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a horizontal control device for a combine equipped with horizontal control means for maintaining the body level, wherein the horizontal control for inhibiting the horizontal control when the reaping unit is raised to a certain upper limit height. Prohibiting means are provided to perform good work while keeping the aircraft level, such as during work while maintaining the normal cutting height position, and turning when the mowing part is raised to a certain height, such as when turning the machine. The purpose of the present invention is to prevent horizontal control from malfunctioning due to centrifugal force or the like and improve the accuracy of horizontal control.

Further, when the reaping unit is lowered to the lower limit constant height, a prohibition releasing means for releasing the prohibition of the horizontal control is provided, and when the reaping unit is lowered to a certain height and approaches the operable position, the reaping unit is automatically turned off. By keeping the machine body horizontal, the machine body is accurately kept horizontal when planting work is resumed without troublesome operation, and the cutting accuracy is improved.

[0005]

Embodiments of the present invention will be described below 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 of the same, in which (1a)
(1b) is a left and right traveling crawler (2a) (2
(b) a track frame on which the track frame (1a) and (1b) are mounted; (4) a feed chain (5) which is stretched to the left and a handling cylinder (6) and a processing machine Threshing unit with built-in body (7), (8) cutting blade (9)
And a mowing unit including a grain culm transport mechanism (10), (1
1) is a hydraulic cutting and lifting cylinder that raises and lowers the cutting unit (8) via the cutting frame (12), (13) is a straw processing unit that faces the end of the straw chain (14), and (15) is a threshing unit ( A grain tank for carrying the grains from 4) through a fryer (16), (17) a discharge auger for carrying the grains of the tank (15) out of the machine, and (18) a steering handle ( 19
b) A driving cabin including a driving operation unit (19) and a driver's seat (20), and (21) is an engine provided below the driving cabin (18), and is configured to continuously cut and thresh grain culms. doing.

As shown in FIGS. 4 and 5, the right and left traveling crawlers (2a) and (2b) are each provided with a driving sprocket (23) attached to a transmission case (22) on the machine base (3) side.
The track frames (1a) and (1b) are supported by a plurality of track rollers (24) attached to the track frames (1a) and (1b) and equalizer rolling wheels (25) and idler wheels (26). Pivot (27) (2
8) and the front and rear bell crank links (29) and (30) are supported by the machine base (3) so as to be able to move up and down freely. The crank links (29) and (30) are mounted on front and rear connecting lateral frames (31) and (32) at the lower part of the machine base (3) by bearings (33).
(34) and the pivots (35) and (36) are pivotally supported at the middle through the pivots (27) and (28).
Is rotatably supported on one end of the link (29) (30), and the other end of the front / rear crank link (29) (30) is connected via a shaft (37) (38) and a rod (39). Left and right hydraulic lifting cylinders (41) that are linked to each other and that support the base end to the machine base (3) via a bracket (40)
The other end of the rear crank link (30) is connected to the tip of the piston rod (41a) (42a) of (42) via the pivot (43), so that the left and right traveling crawlers (2a) (2b) are connected.
The left and right track frames (1a) and (1b) are individually moved up and down with respect to the machine base (3) by appropriately expanding and contracting the piston rods (41a) and (42a) of the cylinders (41) and (42) provided in the cylinder. Thus, the support height of the machine base (3) by the left and right traveling crawlers (2a) and (2b), that is, the vehicle height (H) is made variable.

Further, left and right vehicle height sensors (44a, 44b) for detecting the vehicle height (H) are provided on the machine base (3), and swing together with the arm shaft (45) of the machine base (3). The base ends of the first and second swing arms (46) and (47) are movably supported, and the distal end of the first swing arm (46) and the shaft (38) are supported.
The first arm is connected with a first detection rod (48), and the tip of a meter arm (51) of a potentiometer (50) and a second swing arm (47) installed in a sensor case (49) of the machine base (3). The link is connected by a second detection rod (52), and the crank link (30) swings, that is, the vehicle height (H) due to the expansion and contraction of the left and right lifting cylinders (41) and (42).
Is changed, the amount of change is determined by the potentiometer (5
0).

As shown in FIG. 6, the driving operation unit (19)
The operation panel (19a) has a priority manual switch (53), which is a cross-tilt type manual operation member for adjusting the vehicle height and the left and right inclination by manual operation, and a main and auxiliary transmission lever (54) for shifting the running speed. (55), a threshing clutch lever (56) for turning on and off the threshing clutch, a vehicle height setting volume (57) for continuously setting the vehicle height (H) as a reference of the machine (3), A tilt angle setting volume (58) for continuously setting the left and right tilt angles as a reference of (3), a comprehensive display (59) for performing various displays and setting operations such as a vehicle speed, and the like, and a machine base (3) A tilt angle sensor (60) such as a capacitance type for detecting the left-right tilt of the
1) is provided in the operation panel (19a).

As shown in FIG. 7, a cutting lift switch (62) for vertically adjusting a knob (54a) of the main transmission lever (54) and a front cutting unit (8) is provided, and a driver seat of the knob (54a) is provided. (20) On the right side, which is the side, an auto-lift switch (63) for automatically disengaging the reaping clutch when the reaping unit (8) is raised to a certain height, and the reaping unit (8) is lowered to a certain height. An automatic set switch (64) for automatically turning on the reaping clutch is provided so that these switches (62), (63), and (64) can be operated while the main transmission lever (54) is held. Make up.

As shown in FIG. 8, an electromagnetic switching valve (65) for driving and controlling the left and right hydraulic lifting cylinders (41) and (42).
(66), an electromagnetic switching valve (68) for driving and controlling an elevating cylinder (67) of the discharge auger (17), and an electromagnetic switching valve (69) for driving and controlling an elevating cylinder (11) of the reaper (8). ) Is connected to a hydraulic pump (70), and the electromagnetic switching valve (69) is connected to the hydraulic pump (70) via a relief valve (72) forming a flow control valve (71). (73) and the slow return valve (7) formed by the throttle valve (74).
5) A lift cylinder (11) is connected to the A port (A) of the electromagnetic switching valve (69) via the check valve (76) and the high pressure oil of a hydraulic pump (70) driven by the engine (21). Is supplied to the lifting cylinder (11) via the electromagnetic switching valve (69), and the other switching valves (65) (6) are connected to the B port (B) of the electromagnetic switching valve (69).
6) It is configured to connect (68).

A variable throttle type lifting / lowering speed control valve (77) and a manual emergency lowering valve (78) provided in parallel are connected to a lifting / lowering cylinder (11) via a slow return valve (75). 77) or emergency lowering valve (7
8) The hydraulic oil of the lifting cylinder (11) is returned to the oil tank (79) via the oil tank (79), and a high-speed response electromagnetic formed by a proportional electromagnetic hydraulic switching valve having a speed control solenoid (80) for pulse width modulation control (PWM). A valve (81) is provided, and a throttle valve (82) of a flow control valve (71) is connected to a pilot port (83) of a lifting / lowering speed control valve (77) via a high-speed response electromagnetic valve (81).

When the cutting section (8) is raised by the lifting cylinder (11) by switching the electromagnetic switching valve (69), the governing solenoid (80) is controlled by pulse width modulation control (P
WM), and the pilot pressure appropriately adjusted to the hydraulic pressure by the solenoid valve (81) is applied to the elevating speed control valve (7).
7), the degree of throttle of the control valve (77) is arbitrarily changed, and the mowing unit (8) is moved by the lifting / lowering cylinder (11) whose operating speed is adjusted according to the degree of throttle of the control valve (77). And the reaper (8)
To lower the solenoid valve (69) to neutral or B
Switching to the port (B) side, the solenoid valve (81) is operated by pulse width modulation control (PWM) in the same manner as described above, and the throttle opening of the elevating speed control valve (77) is adjusted by adjusting the pilot pressure. The mowing part (8) is lowered by adjusting the operating speed of the cylinder (11).

As shown in FIG. 1, left and right vehicle height sensors (44a, 44b), an inclination angle sensor (60), a vehicle height setting volume (57), and an inclination angle setting volume (5).
8), a manual switch (53), and an ultrasonic cutting height sensor (84) for detecting a cutting height of a grain culm which is a supporting height of the cutting blade (9) of the cutting unit (8) with respect to a field (ground) surface. ), A threshing switch (85) that is turned on by the on operation of the threshing clutch lever (56), a reaper switch (86) that is turned on by the on operation of the reaping clutch, the auto-lift switch (63), and an auto-set. Switch (64)
An automatic clutch switch (87) for automatically turning on and off the cutting clutch when the cutting unit (8) is raised or lowered to a certain height by the operation of the above, and the automatic lift and auto set switches (63) (64); Is connected to a controller (61), and an electromagnetic switching valve (65) for drivingly controlling the lifting / lowering cylinders (41) and (42).
(66) solenoid for raising and lowering (65a) (65)
b) and (66a) and (66b), and the electromagnetic switching valve (6
9) Ascending and descending solenoids (69a) (69b)
And threshing clutch cylinder (8
8) On-operation solenoid (89) of the electromagnetic switching valve (89)
a) and the on-operation solenoid (9) of the electromagnetic switching valve (91) of the reaping clutch cylinder (90) for switching the reaping clutch on and off.
1a) is connected to the controller (61) to perform horizontal control of the aircraft.

FIG. 9 and FIG. 10 show the equalizer wheels (2
5 shows a support structure for a swing fulcrum shaft (93) on the track frame (1a) (1b) side of the equalizer frame (92) for supporting the fulcrum shaft (93) and the wheel (2).
5) A bush (95) is interposed between the cylindrical shafts (94), and between the large-diameter shaft portion (93a) formed to be larger than the outer diameter of the bush (95) and the cylindrical shaft (94), and between the cylindrical shaft (94). 94) and a ring seal (9) between the cylinder shaft presser (97) by the nut (96).
8) to prevent water from entering inside the gap between the cylinder shaft (94) and the cylinder shaft presser (97) to prevent the thrust surface from being worn or the nut (96) from being loosened. It is configured to eliminate it.

While the cutting height raising output of the cutting unit (8) is being controlled by the electromagnetic switching valve (69), the cylinders (41) and (42) for horizontal control and the raising / lowering cylinder of the discharge auger (17) are controlled. The supply of the hydraulic pressure to (67) is stopped (because the hydraulic circuit is prioritized for cutting up), and horizontal control is prohibited.

In addition to the above, the horizontal control at the cutting height position is prohibited as shown in the flowchart of FIG. 11, and when the cutting height sensor (84) operates normally, the automatic lift control is automatically performed. Upper limit constant height (H-H1) set to a value lower than the lift position (H) by a predetermined height (H1)
When the cutting height is larger and the threshing switch (85) is off, it is determined that the work is stopped during non-working, and when the cutting height sensor (84) is operating normally, the upper limit constant height ( H-H
1) When the cutting height is larger than that and the auto-lift control (auto-lift switch (63) is ON), it is determined that the work in the cutting operation is stopped, the horizontal control is prohibited, and the cutting unit (8) ) Is held at a high position to prevent improper operation of the horizontal control due to centrifugal force or the like during the turning while holding the reaping section (8) at a constant high position while the hull is being held at a constant high position.

As shown in the flowchart of FIG.
When the cutting height sensor (84) is abnormal, or when the cutting height sensor (84) is normal, the lower limit constant height is set to a value lower than the autolift position (H) by a predetermined height (H2) (H2> H1). When the cutting height is smaller than the height (H-H2) and the threshing switch (85) is turned on, or when the cutting height sensor (84) is normal, the cutting height is smaller than the constant height (H-H2). In any of the cases where the output is small and the mowing lowering output is being executed, the above-described determination that the work is stopped is released, and the state is returned to the state where the horizontal control is possible. H2) The horizontal control is permitted when approaching the cutting height position below.

[0018]

As is apparent from the above embodiment, the present invention relates to a combine horizontal control device provided with a horizontal control means for maintaining the body in a horizontal position. ) Is provided with a horizontal control prohibiting means that prohibits horizontal control when raising the aircraft. Therefore, when performing work while maintaining the normal cutting height position, perform good work while maintaining the aircraft level. In addition, when the reaping unit (8) is raised to a certain height, for example, when the aircraft is turning, the horizontal control can be prevented from malfunctioning due to the turning centrifugal force or the like, and the accuracy of the horizontal control can be improved. .

Further, the cutting section (8) is fixed at the lower limit constant height (H-
Since the prohibition canceling means for canceling the prohibition of the horizontal control when descending to H2) is provided, the reaper (8)
Is lowered to a certain height, and when approaching the workable position, the aircraft is automatically kept horizontal,
When the planting operation is resumed without troublesome operation, the machine body can be accurately kept horizontal and the cutting accuracy can be improved.

[Brief description of the 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 an explanatory side view of a crawler unit.

FIG. 5 is an explanatory rear view of a crawler unit.

FIG. 6 is an explanatory diagram of a driving operation unit.

FIG. 7 is an explanatory diagram of a main transmission lever portion.

FIG. 8 is a hydraulic circuit diagram.

FIG. 9 is an explanatory plan view of an equalizer wheel;

FIG. 10 is an explanatory diagram of a seal portion of an equalizer wheel;

FIG. 11 is a flowchart.

FIG. 12 is a flowchart.

[Explanation of symbols]

 (8) Cutting part (H-H1) Constant height (H-H2) Constant height

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Teruki Tonami 1-32 Chayacho, Kita-ku, Osaka Yanmar Agricultural Machinery Co., Ltd.

Claims (2)

[Claims] 1. A combine horizontal control device having horizontal control means for maintaining a body level, wherein horizontal control prohibition means for prohibiting horizontal control when the cutting unit is raised to a certain upper limit height is provided. Combine horizontal controller. 2. The combine horizontal control device according to claim 1, further comprising a prohibition canceling means for canceling the prohibition of the horizontal control when the cutting unit is lowered to a certain lower limit height.