JPH11289849A - Horizontal control apparatus for body height of combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the safety turning of a combine by inhibiting a horizontal control when the moving speed is higher than a specified value in the horizontal control of the height of the machine body. SOLUTION: In a horizontal control apparatus for body height of a combine, which controls the height of the machine body by horizontally moving it, when the output of the vehicle speed sensor 90, which detects the travelling speed of the machine body, is higher than a specified value, the following are checked: a steering means is directed in turning, a straight advance detection switch 93 is off, a stock-side detection sensor 91 of a depth automatic controlling means is off, and a reaping switch 92, which shifts on-off of a reaping clutch by a working clutch lever, is on. When all the above conditions are satisfied, the horizontal control is inhibited, and the body height horizontal control is conducted with a lag time before the horizontal control inhibition is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine and, more particularly, to a vehicle height and level control device when a combine body rotates.

[0002]

2. Description of the Related Art Conventionally, a combine height level control has been performed by an automatic lift switch provided on a main shift lever,
That is, when the mowing unit is raised to a certain height, by inputting a switch that automatically turns off the mowing clutch,
The vehicle height level control was prohibited by detecting the rotation of the combine.

[0003]

However, when the harvester moves up and down without using the auto-lift switch during the turning of the combine, the signal of the inclination sensor is erroneously output due to the centrifugal force during the turning, and the horizontal control is performed. Had the problem of malfunctioning.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems. When the vehicle height of an airframe is controlled horizontally, the horizontal control is prohibited when the traveling speed is equal to or higher than a predetermined value, and the safety of the combine is reduced. The purpose is to obtain a proper round trip.

[0005]

SUMMARY OF THE INVENTION The present invention, in order to achieve the above object, provides a vehicle height level control device in a combine as described below. That is, in the vehicle height level control device of the combine that horizontally controls the vehicle height of the body, when the output of the vehicle speed sensor that detects the traveling speed of the body is equal to or more than a certain value, it is determined that the steering means is operated to rotate. When the straight travel detection switch is turned off, the stock depth detection sensor of the handling depth automatic control means is turned off, and the cutting switch that operates the on / off operation of the cutting clutch by the work clutch lever satisfies all of the ON conditions, A vehicle height level control device in a combine, wherein control is prohibited and a delay time is provided until horizontal control prohibition is released. Also, in a combined vehicle height level control device that horizontally controls the vehicle height, when the main shift lever is shifted to the forward position, it detects that the steering means has been operated to rotate and detects straight traveling. When the switch is OFF, the stock source detection sensor of the handling depth automatic control means is OFF, and the cutting switch for operating the cutting clutch by the work clutch lever is ON, the horizontal control is prohibited,
In addition, there is provided a vehicle height level control device in a combine, wherein a delay time is provided until horizontal control prohibition is released.

[0006]

Next, an embodiment in which the present invention is applied to a combine will be described. FIG. 1 shows a traveling crawler (2).
FIG. 2A is a side view of a combine (1) having a pair of right and left traveling devices (2) provided with (a), FIG. 2 is a plan view of the combine (1), and (1a) and (1b) are traveling portions. A track frame on which left and right traveling crawlers (2a) and (2b) are mounted, and (3) is the track frame (1a).
(1b) a machine stand to be installed, (4) a threshing unit in which a feed chain (5) is stretched to the left and a handling drum (6) and a processing drum (7) are built in, and (8) is a cutting blade ( 9) and a mowing section provided with a culm transport mechanism (10), etc., (11) is a hydraulic mowing elevating cylinder for raising and lowering the mowing section (8) via a mowing frame (12), and (13) is a straw chain (14). (2) a straw processing section at the end, (15) a grain tank for carrying the grains from the threshing section (4) through a fryer (16), (17)
Is a discharge auger for carrying out the grains of the tank (15) out of the machine, (18) is a driving cabin provided with a driving operation part (19) such as a steering handle (19b) and a driving seat (20);
An engine (21) is provided below the driving cabin (18), and is configured to continuously cut and threat grain culms.

As shown in FIGS. 3 and 4, the right and left traveling crawlers (2a) and (2b) are driven sprockets (23) to be attached to the transmission case (22) on the machine base (3) side.
And a plurality of track rollers (24) attached to the track frames (1a) and (1b) and an equalizer wheel (2).
5) and the idler wheel (26), and the track frames (1a) (1b) are supported by the front and rear pivot shafts (27).
(28) and front and rear bell crank links (29) (30)
And is supported by the machine base (3) so as to be able to move up and down freely.
The crank links (29) and (30) are attached to the front and rear connecting horizontal frames (31) and (32) at the lower part of the machine base (3).
3) The intermediate portion is swingably supported via (34) and the support shafts (35) and (36), and the pivot shafts (27) and (2)
8) is rotatably supported at one end of the link (29) (30), and the shafts (37) (38) and the rod (39) are connected between the other ends of the front and rear crank links (29) (30). And linked to each other via the bracket (4)
0), the piston rods (41a) (42) of the left and right hydraulic lifting cylinders (41) (42) pivotally supporting the base end.
a) The other end of the rear crank link (30) is connected to the tip via a pivot (43), so that the left and right traveling crawler (2) is connected.
a) The cylinder (41) provided in each of (2b)
By appropriately expanding and contracting the piston rods (41a) and (42a) of (42), the left and right track frames (1a) and (1b) are vertically moved with respect to the machine base (3), respectively.
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 varied.

Further, first and second swinging means for swinging the left and right vehicle height sensors (44a, 44b) for detecting the vehicle height (H) integrally with the arm shaft (45) of the machine base (3). Arm (4
6) The base end of (47) is supported, and the first swing arm (4
6) and the first detection rod (4) between the shaft (38).
8) and a second detection between the distal ends of the second swing arm (47) of the meter arm (51) of the potentiometer (50) installed in the sensor case (49) of the machine base (3). When the crank link (30) swings, that is, the vehicle height (H) changes due to the expansion and contraction of the left and right elevating cylinders (41) and (42), the amount of the change is measured by a potentiometer ( 50).

As shown in FIG. 5, the driving operation unit (1)
9) An operation panel (19a) includes a priority manual switch (53), which is a cross-tilt type manual operation member for adjusting the vehicle height and the lateral inclination by manual operation, and a main and sub-transmission lever ( 54) (55), a threshing clutch lever (56) for turning on and off the threshing clutch, and a machine base (3)
Height setting volume (57) for setting the vehicle height (H) as a reference for the machine in a stepless manner, and an inclination angle setting volume (58) for setting the horizontal inclination angle as a reference for the machine (3) in a stepless manner
And a comprehensive display (5) for various display and setting operations such as vehicle speed
9) and the like, and a tilt angle sensor (60) such as a pendulum type for detecting the left-right tilt of the machine base (3) and a controller (61) are provided in the operation panel (19a). A straight-ahead detection switch (93) is provided at the lower end of the steering handle (19b), and has a function of detecting a straight-ahead operation of the aircraft.

As shown in FIG. 6, the main shift lever (5
4) A knob (54a) on the right side of the front surface of a mowing raising / lowering switch (62) for vertically adjusting the mowing portion (8), and the left side of the front surface of the knob (54a) adjust the handling depth of the grain stem inserted into the threshing unit (4). In addition to the provision of a handling depth switch (63), an automatic cut-off clutch is automatically disengaged when the cutting section (8) is raised to a certain height on the right side of the knob (54a) on the driver's seat (20) side. Lift switch (64a) and reaper (8)
An automatic set switch (64b) for automatically turning on the mowing clutch when lowering to a certain height is provided, and with the main shift lever (54) held with the left hand, the auto lift and auto set switches ( 64
a) and (64b), the cutting / elevating switch (62) is operated with the index finger, and the handling depth switch (63) is operated with the middle finger. A position detection switch (94) (or a position detection potentiometer) that detects a shift position when the lever (54) is shifted to the forward position is provided at a lower end portion of the main speed change lever (54).
Is provided.

As shown in FIG. 7, an electromagnetic switching valve (65) for driving and controlling the left and right hydraulic lifting cylinders (41) (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). (76) and the slow return valve (7) formed by the throttle valve (74).
5) A lifting 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 (PW).
M), and the pilot pressure adjusted to an appropriate hydraulic pressure by the solenoid valve (81) raises / lowers the speed control valve (77).
, The degree of throttle of the control valve (77) is arbitrarily changed, and the mowing unit (8) is raised by the lifting cylinder (11) whose operating speed is adjusted according to the degree of throttle of the control valve (77). 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).

However, as described above, in a combine having a control device for detecting the traverse by input of the auto-lift switch (64a) and prohibiting the vehicle height level control, the automatic lift switch (64a) is used when the combine traverses.
If the mowing elevation is performed without using a), the centrifugal force during the rotation causes the signal of the inclination angle sensor (60) to be erroneously output, and the horizontal control to malfunction.

Therefore, in order to solve the above-mentioned inconvenience, the present invention, as shown in FIG. 8, employs a vehicle speed sensor (90) mounted on a transmission case (22) and a rear side of a raising portion of a mowing portion (8). Stock detection sensor (91) provided at the side, a reaping switch (92) provided at a side column of the driving operation unit (19), and a straight-ahead detection switch (93) provided at the lower end of the steering handle (19b). ) Is connected to the controller (61), and the lifting cylinder (4) is connected to the controller (61).
1) An electromagnetic switching valve (65) (6) for driving and controlling (42)
6) Ascending and descending solenoids (65a) (65b)
(66a) and (66b) and the controller (61)
Are connected to perform horizontal control of the aircraft.

In the present invention having the above-described configuration, when the vehicle speed sensor (90) detects that the traveling speed of the combine is equal to or higher than a predetermined value during the circulation of the combine, the steering means is operated to rotate. The straight-ahead detection switch (93) is turned off upon detection of this, the stock-source detection sensor (91) of the handling depth automatic control means is turned off, and the cutting switch (92) for operating the cutting clutch by the work clutch lever. When all the ON conditions are satisfied, the controller (61) outputs a horizontal control prohibition signal, and the ascending and descending solenoids (65a) (65b).
The operations of (66a) and (66b) are excited to start the operation of inhibiting the horizontal control, and the combine shifts to the circulating operation. And
By providing a delay time from the circling operation to the release of the horizontal control prohibition, more reliable vehicle height horizontal control can be obtained.

Further, in the above-described vehicle height level control, in the wetland work, there is a case where the work is performed with the steering handle (19b) turned off and the horizontal control function is effective. In this case, the stock sensor (91) is set to O
By setting N, horizontal control becomes possible. Furthermore, when harvesting after recirculation, especially in wet fields, where the field is rough, horizontal control is required. In general, the vehicle speed is sometimes low in wet fields, so the vehicle speed sensor (90) detects the traveling speed of the aircraft at a constant speed. Recognizing that it is less than the value, the controller (61)
The horizontal control becomes possible in response to the horizontal control prohibition release signal from. Further, when the aircraft is moved with the horizontal control function in the wetland, the cutting switch (92) is turned off.
F, that is, in the non-working state, horizontal control becomes possible. On the other hand, when circulating in a dry field, the vehicle speed drops during circling and the effect of centrifugal force remains. Accordingly, there is an advantage that malfunction can be prevented.

In the above embodiment, the vehicle speed sensor (90) is used as one of the conditions for establishing the horizontal control prohibition. However, instead of the sensor (90), as shown in FIG. When the position detection switch (94) (or position detection potentiometer) of the lever (54) is used to detect that the position of the main transmission lever is at the forward position, it is detected that the steering means has been operated to rotate. Straight detection switch (9
3) is OFF, the stock sensor (91) of the handling depth automatic control means is OFF, and the cutting switch (92) for operating the cutting clutch by the work clutch lever is ON.
When all of the conditions are satisfied, the horizontal control is prohibited by receiving the horizontal control prohibition signal from the controller (61), the revolving operation of the combine is executed reliably, and the vehicle speed sensor (90) is used. The same effect can be obtained.

In addition, FIG. 10 relates to an improvement of a lifting cylinder relating to horizontal control. In the lifting cylinder (type: 1) as shown in FIG. 10 (a), when the vehicle height level control for adjusting the vehicle height and the left and right inclination by manual operation is performed, the priority manual switch (53) which is a manual operation member is operated. The left and right ascending valves were turned on at the same time.
When such control is performed, the load balance on the left and right differs depending on the amount of paddy in the grain tank (15). Therefore, the lightly loaded cylinders (41) and (42) reach the end first, and move up and down horizontally. The inability to move was inconvenient.

In order to eliminate such inconvenience,
As shown in FIG. 10 (b), the left and right lifting cylinders (4
1) Instead of (42), a single vertical cylinder (95) connected to a common hydraulic circuit is used, and a rotating cylinder (96) also connected to an independent hydraulic circuit for rotation.
And by adopting independent configurations (type:
2) When the vehicle is up and down manually, the vehicle height up and down cylinder (95) is driven to average the vehicle height and can be driven simultaneously. In the horizontal control, the rotation cylinder (96) is driven. In the case of left rotation, the left end of the body can be tilted to function as a fulcrum (S). According to such a configuration, the hydraulic circuit has a simple configuration. In the case of circulating control, the vehicle does not go up and down diagonally when the vehicle height goes up and down, and the adjustment of the vehicle height and the inclination can be easily and safely performed manually. As a result, the left and right overload balance caused by the amount of paddy in the grain tank is different, and the inconvenience of being unable to move up and down horizontally has been resolved.

[0021]

As described above, according to the first aspect of the present invention, the output of the vehicle speed sensor for detecting the traveling speed of the aircraft is equal to or more than a predetermined value in the height control of the combine for horizontally controlling the vehicle height of the aircraft. In the case of, when the steering means is operated to rotate, the straight running detection switch is turned off, the stock sensor of the automatic handling depth control means is turned off, and the cutting clutch is turned on and off by the work clutch lever. When the harvesting switch to be operated satisfies all of the ON conditions, the horizontal control is prohibited, and a delay time is set until the horizontal control prohibition is released, thereby preventing a malfunction of the horizontal control and improving the accuracy of the horizontal control. . Further, in such a condition, in the wetland work, when the work is performed with the steering function turned off and the horizontal control function is applied, the horizontal control can be performed by turning on the stock sensor. . Furthermore, during harvesting after recirculation, especially in wet fields, the field is rough, and the running speed of the body is reduced, so that the vehicle speed sensor operates to enable horizontal control. Further, by switching the harvesting switch to OFF, the harvesting is in a non-working state and the function can be shifted to the horizontal control. According to the second aspect of the present invention, when the main shift lever is shifted to the forward position, it is detected that the steering means has been operated to rotate, the straight-ahead detection switch is turned off, and the handling depth is automatically adjusted. When the stock sensor of the control means is OFF and the cutting switch for operating the cutting clutch by the work clutch lever satisfies all the ON conditions, the horizontal control is prohibited, and until the horizontal control prohibition is released. Since the delay time is set, the operator himself / herself can surely confirm the horizontal control, and a remarkable operation and effect of preventing a malfunction of the circling operation can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a plan view of the combine.

FIG. 3 is an explanatory side view of a crawler unit.

FIG. 4 is an explanatory rear view of a crawler unit.

FIG. 5 is an explanatory diagram of a driving operation unit.

FIG. 6 is an explanatory view of a main shift lever.

FIG. 7 is a hydraulic circuit diagram

FIG. 8 is a control circuit diagram of the first embodiment.

FIG. 9 is a control circuit diagram of a second embodiment.

FIG. 10 (a) Schematic diagram of lifting cylinder (type 1) (b) Schematic diagram of lifting cylinder (type 2)

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combine 2 Traveling device 2a, 2b Traveling crawler 8 Cutting part 15 Grain tank 19b Steering handle 20 Driver's seat 22 Transmission case 24 Track roller 25 Equalizer rolling wheel 26 Idling wheel 41, 42 Left and right lifting hydraulic cylinder 54 Main shifting lever 61 Controller 64a Auto-lift switch 64b Auto-set switch 65a Ascending solenoid 65b Ascending solenoid 69 Solenoid switching valve 70 Hydraulic pump 90 Vehicle speed sensor 91 Stock detection sensor 92 Cutting switch 93 Straight-ahead detection switch 94 Position detection switch 95 Up-and-down lifting cylinder 96 Rotating cylinder

 ──────────────────────────────────────────────────の Continuing the front page (72) Wataru Nakagawa 1-32 Chayacho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Agricultural Machinery Co., Ltd.

Claims (2)

[Claims] In a combined vehicle height level control device for horizontally controlling the vehicle height of a vehicle, when an output of a vehicle speed sensor for detecting a traveling speed of the vehicle is equal to or higher than a predetermined value, the steering means is operated to rotate. Is detected, and the straight running detection switch is turned off.
F, when the stock depth detection sensor of the handling depth automatic control means is OFF, and the cutting switch for operating the on / off of the cutting clutch by the work clutch lever satisfies all the ON conditions,
A vehicle height level control device in a combine, wherein a level control is prohibited and a delay time is provided until the horizontal control prohibition is released. 2. A combined vehicle height level control device for horizontally controlling a vehicle height of an airframe, wherein when a main shift lever is shifted to a forward position, it is detected that the steering means is operated to rotate. When the straight running detection switch is OFF, the stock depth detection sensor of the handling depth automatic control means is OFF, and the cutting switch that operates the on / off of the cutting clutch by the work clutch lever satisfies all the ON conditions, horizontal control is performed. A vehicle height level control device in a combine, wherein the vehicle height level control device is prohibited and a delay time is provided until horizontal control prohibition is released.