JP3449921B2 - Combine hydraulic control unit - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention is applicable to oil <br/> pressure control device Konbai down. 2. Description of the Related Art Conventionally, Oite the Konbai down the b changing the relative vertical position of the traveling device and the left and right body - comprises a perform the attitude adjustment device of the ring control, etc., further traveling direction steering regulation and to adjust the, and with also performed constituting the regulatory reaper equipment vertical movement to cutting device height relative airframe. [0003] Then, these attitude adjustment, steering regulation, for regulating cutting <br/> device height hydraulic cylinder for fuselage upper and lower cylinders for the upper <br/> down reaper, the cylinder for steering, It is provided in the hydraulic circuit by the same hydraulic pump. For example, Japanese Patent Application Laid-Open
Japanese Patent No. 2511 discloses a hydraulic cylinder for vertical movement of the body by vertically moving the left and right traveling devices independently or integrally with the body in a hydraulic circuit by the same hydraulic pump, and a hydraulic cylinder for raising and lowering the reaper . reaper and upper and lower cylinder, a hydraulic apparatus for Konbai emissions provided a steering cylinder for machine gymnastics direction is described. [0004] The above-mentioned Japanese Unexamined Patent Publication No.
In the configuration described in 2511 JP, cutting device for vertical
Cylinder, a hydraulic cylinder for fuselage upper and lower, actuation priority relationship Siri <br/> Sunda for steering not determined. [0005] Thus, for example, the attitude adjustment of the airframe harvesting and lifting regulation of instrumentation <br/> location and steering adjustment of aircraft conflict, for aircraft vertical
If Siri <br/> Sunda and simultaneously the oil feed of the cylinder and steering for vertical cutting and a hydraulic cylinder is made of, on the relationship between the cylinder thrust settings according to the load, in particular a hydraulic cylinder for aircraft vertical sufficient hydraulic fluid to the cylinder of the cylinder and steering for vertical mowing spent a large amount of hydraulic oil is no longer sent. [0006] Consequently, it is impossible to smoothly perform the lifting regulation and steering adjustment of aircraft cutting apparatus should be of high importance than attitude adjustment of the aircraft in making appropriate work travel, mowing
There was a disadvantage that the efficiency of the threshing operation was reduced. The present invention employs the following technical means in order to solve the above-mentioned problems. That is, placed in the hydraulic circuit 66 of the same hydraulic pump P
And the hydraulic circuit 67 of the cutting vertical cylinder 48
Under braking valve Reaper for lowering reaper upper control valve 49 reaper for increased
And 50 are provided so as to operate electromagnetically, and are provided for pitching.
In the hydraulic circuit 68 of the hydraulic cylinder 8, the vehicle body 10
Pitching and vice versa
A pitching control valve 51 for switching
Of the pair of right and left rolling hydraulic cylinders 2 and 2
The pressure circuit 69 is provided with the left or right scroll frame 6.
Left and right switches that switch up and down independently or simultaneously
-Providing control valves 52, 52 for rings,
Operate the transmission clutch etc. of No. 4 to steer the running direction left and right
The hydraulic circuit 71 of the steering cylinders 70, 70
Steering control valve that is electromagnetically switched and interlocked by lever operation
72, and the harvester is operated by operating the harvesting lever switch 57.
Switching harvesting control valve 49 and harvesting control valve 50 to harvest
Raising the mowing device or controlling the mowing under the control valve 49
The mowing device is configured to be lowered by the valve 50,
When the manual tilt switch 55 provided on the vertical device is operated,
The pitching and rolling control valves 51, 52,
52 is switched so that the vehicle body 10 starts pitching or
Move the right or left cradle frame 6, 6 up and down to
It is constructed so that the ring operates, and the height above the vehicle mounted on the control device
When the lower switch 56 is operated to raise the vehicle height, the left and right
The control valves 52, 52 for the rings are switched to the up position;
While raising the vehicle height, the switch 56 for raising and lowering the vehicle height is set to the vehicle height.
When operated to the lower side, the control valves 52 for left and right rolling,
52 is switched to the lower side and the vehicle height is lowered.
However, in pitching control, the front-rear inclination sensor 60
When the inclination of the vehicle body 10 in the front-rear direction is detected,
Switching the control valve 51 for pitching and hydraulic pressure for pitching
The cylinder 8 is extended and retracted, and this pitching hydraulic
The front and rear stroke sensors 62 detect the amount of expansion and contraction of the
The vehicle body 10 is horizontally moved in the front-rear direction by feedback control.
Configuration that can be maintained in the state
The left and right inclination sensor 61 detects the left and right inclination of the vehicle body 10
Then, by this, the control valve 52 for left rolling or
By switching the control valve 52 for right rolling, the right and left rolling
The hydraulic cylinders 2 and 2 are extended and retracted,
Stroke of the hydraulic cylinders 2 and 2
Feedback control while detecting with the sensors 63 and 64
The vehicle body 10 can be controlled and maintained in a horizontal state.
And a hydraulic system for pitching and rolling.
The cylinders 8, 2, 2 for cutting and raising and lowering
Operation control relationship with cylinders 70, 70
Are hydraulic cylinders 8 for pitching or rolling,
2 and 2 are control valves 51 and 5 for pitching or rolling.
The crawlers 4 and 4 are pushed down by the
When operating in the direction to push up
Cylinder 48 is operated by the harvesting control valve 49
When the reaper is raised or the steering cylinder 70,
70 is operated by a steering control valve 72 for steering.
In this case, the control valve 5 for pitching and rolling is used.
1, 52, 52 are stopped at the neutral position and pitching and
Vehicle by operation of hydraulic cylinders 8, 2, 2 for rolling
The lifting of the body 10 shall be stopped and during this time
Cutting up of the cylinder 48 for cutting up and down by the upper control valve 49
Completion of the lifting operation or steering by the control valve 72 for steering
When the steering operation of the cylinders 70, 70 is completed,
Thus, the pitching or rolling stopped at the neutral position
The control valves 51, 52 and 52 for rings are switched and output to
For hydraulic cylinders 8, 2, 2 for pitching or rolling
The operation in the direction of pushing up the vehicle body 10 is resumed.
It is obtained by the configuration of the hydraulic control device for Konbai down, characterized in that the sea urchin configuration. [0008] The cutting for raising the cutting provided in the hydraulic circuit 67
The control valve 49 and the cutting lowering control valve 50 for cutting lowering are electromagnetically connected.
, The mowing up and down cylinder 48 expands and contracts.
The reaper is then raised or lowered. Also hydraulic
Switching operation of the pitching control valve 51 provided in the circuit 68
Then, the pitching hydraulic cylinder 8 operates and the vehicle
The body 10 pitches backward and downward, and vice versa.
Pitch in the direction. The left and right trolleys provided in the hydraulic circuit 69
When the switching control valves 52, 52 are switched, the left and right
The hydraulic cylinders 2 and 2 for rolling of the pair are extended and retracted.
And the left or right crawl frame 6 is independently or
Move up and down at the same time. In addition, for steering provided in the hydraulic circuit 71
The control valve 72 is electromagnetically switched and operated by operating the steering lever.
As a result, the steering cylinders 70, 70 operate.
The driving clutches of the left and right crawler 4 are operated to drive
The direction is steered left and right. Further , the harvesting lever switch 57 is operated.
And the cutting control valve 49 and the cutting control valve 50 are switched.
And the mowing device is raised by the mowing control valve 49.
The cutting device is lowered by the cutting control valve 50. Also,
Operate the manual tilt switch 55 provided on the steering device
And pitching and rolling control valves 51, 52,
52 is switched so that the vehicle body 10 starts pitching or
The right or left cradle frame 6, 6 moves up and down
Ring operates. Further , a switch for raising and lowering the vehicle height provided on the steering device is provided.
When the switch 56 is operated to raise the vehicle height,
Control valves 52, 52 are switched to the up side and the vehicle height rises
On the other hand, the switch 56 for raising / lowering the vehicle
When operated to the left and right rolling control valves 52, 52
The vehicle is switched to the lower side and the vehicle height decreases. In the pitching control,
The inclination sensor 60 detects the inclination of the vehicle body 10 in the front-rear direction.
This causes the control valve 51 for pitching to be switched.
The pitching hydraulic cylinder 8 expands and contracts,
The stroke of the hydraulic cylinder 8 for
By performing feedback control by detecting with the sensor 62,
Thus, the vehicle body 10 is controlled and maintained in the front-rear horizontal state. In rolling control, the vehicle body 1
When the left / right inclination sensor 61 detects the left / right inclination of 0,
Thereby, the control valve 52 for the left rolling or the right rolling
The control valve 52 for the ring is switched so that the left and right rolling
Hydraulic cylinders 2, 2 extend and contract, for each rolling
Stroke of the hydraulic cylinders 2 and 2
Feedback control while detecting with sensors 63 and 64.
Thus, the vehicle body 10 is controlled and maintained in the left-right horizontal state. Thus, for pitching or rolling,
Hydraulic cylinders 8, 2, 2 for pitching or rolling
Push the rollers 4, 4 by the control valves 51, 52, 52
When operating in the direction of pushing down and pushing up the body 10,
At the same time, the upper control valve Cylinders 48 for vertically cutting the cutting 49
When the mowing device is operated by lifting or steering
Cylinders 70, 70 are operated by a control valve 72 for steering.
When moving and steering, this pitching and rolling
Control valves 51, 52, 52 are stopped at neutral positions
Hydraulic cylinders 8, 2, 2 for pitching and rolling
, The lifting of the vehicle body 10 is stopped. During this time, the harvesting control valve 49
Is the mowing up operation of the mowing vertical cylinder 48 completed?
Alternatively, the steering cylinder 70 by the steering control valve 72,
When the steering operation of 70 is completed, the vehicle stops at the neutral position and stops.
Pitching or rolling control valves 51, 52,
52 is switched and outputted for pitching or rolling oil.
Direction in which the body 10 is pushed up by the pressure cylinders 8, 2, 2
Is resumed. [0016] As is evident from the foregoing description, according to the present invention, Oite the con <br/> by emissions, pitching adjusted and the vehicle body 10 of the vehicle body 10
Aircraft attitude adjustments such as rolling adjustment and vehicle height adjustment,
Multi-functional adjustment such as vertical adjustment of the reaper and steering adjustment of the vehicle 10
Yet as it is possible to perform the section, one of each of these regulatory functions, and pitching related to the attitude adjustment of the airframe
Supply of hydraulic oil to hydraulic cylinders 8, 2, 2 for rolling
The cutting and lifting cylinders 48 and the steering units for raising and lowering the harvesting device and adjusting the steering of the aircraft, which are more important than the attitude adjustment of the aircraft, in carrying out the appropriate harvesting and threshing work rather than feeding .
We shall emphasize the supply of hydraulic fluid to the cylinder 70, 70
As a result, the efficiency of the cutting and threshing operation can be improved. Embodiments of the present invention will be described with reference to the drawings. On each of the left and right sides of the pitching frame 1, a roller hydraulic cylinder 2 provided on the pitching frame 1 and a rolling link mechanism 3 which moves up and down in parallel mount each of the rollers 4. A pair of left and right crawler frames 6 each having a wheel 5 are independently provided so as to be able to move up and down independently.
A vehicle body 10 is provided which is rotatable up and down on the other end side around a pitching shaft 7 at one end side of the front and rear, and which has a pitching hydraulic cylinder 8 and a pitching link mechanism 9 for this vertical rotation. The pitching frame 1 integrally connects a pair of left and right vertical frames 11 with front and rear connecting frames 12, and furthermore, a pitching shaft 7 connects between front ends of the vertical frames 11. The rear ends are connected by a rolling arm shaft 13. Rolling arms 14 and 15 constituting a pair of left and right rolling link mechanisms 3 are rotatably provided on the front and rear pitching shaft 7 and the rolling arm shaft 13. The front and rear sides of the frame 6 are connected to the lower ends of the left and right rolling arms 14 and 15 by a pivot shaft 1.
A hydraulic piston 19 of a rolling hydraulic cylinder 2 mounted on a bracket 18 pivotally mounted at 6, 17 and protruding above the front of the pitching frame 1 is connected to the upper end of this rear rolling arm 15. Then, by the expansion and contraction of the rolling hydraulic cylinder 2, the left and right crawler frames 6 are moved up and down with respect to the pitching frame 1. Reference numeral 20 denotes a rod for connecting the front and rear rolling arms 14 and 15 for interlocking. The left and right crawler frames 6 are provided with rolling wheels 5 on which the crawler 4 is stretched. The roller 5 is provided with sprocket rollers 21 and 22 at the front and rear middle and rear ends, and is engaged with a driving hole provided along the center of the crawler 4 to be guided and rotated. The rear end sprocket wheel 22 is provided on a guide frame 24 and a tension bar 23 which extend and contract back and forth with respect to the rear end of the crawler frame 6. -The pressure of the roller 4 is constantly increased. On the front pitching shaft 7 of the vertical frame 11 of the pitching frame 1, there is provided a rotating boss 25 which is rotatable around the pitching shaft 7. The bracket 26 at the front end of the vehicle 10 is configured to be detachable with bolts, nuts and the like, and the vehicle body 10 is configured to be rotatable up and down around the pitching shaft 7.
A link pin 27 is provided on the rear part of the left and right vertical frame 11 of the pitching frame 1 to rotatably fit and support the tip of a link 28 of the pitching link mechanism 9 provided on the vehicle body 10. . The vehicle body 10 is mainly composed of a pair of left and right vertical frames, and the vertical frames are integrally connected to each other by a suitable number of front and rear portions by a horizontal frame 29.
The sprocket shaft 31 of the driving sprocket 30
Are mounted and supported by an axle housing 32 which covers the bearing. A pitching link mechanism 9 provided on the vehicle body 10 includes a pair of left and right arm links 34 rotatable around a pitching arm shaft 33 at a rear portion, and the arm link 3.
Link 28 pivotally connected to the tip of the fourth by a pivot pin 35
And an arm that rotates integrally with these arm links 34.
The arm 36 is connected to a hydraulic piston 37 of a pitching hydraulic cylinder 8 attached to the vehicle body 10, and the link 28 is connected to the pitching frame 1 by hydraulic expansion and contraction of the pitching hydraulic cylinder 8. By rotating around the link pin 27, the vehicle body 10 is vertically rotated around the pitching shaft 7 by the link 28 and the arm link 34. Each of the rolling arms 14 and 15 provided before and after the pitching frame 1 includes an inner arm 38 formed in a crank shape in a front view and an outer arm 39 having a straight plate shape. The inner parts of the inner arm 38 and the distal end of the outer arm 39 are used to tighten the ends of the rolling arm shafts 7, 13 with the collars 41, 42. It is provided rotatably with interposition. The vertical frame 11
With this collar 41 fixed, the rolling arm shafts 7 and 1 are fixed.
3 and the inner and outer arms 38 together with the vehicle body 10 located above.
And 39 are provided within the interval. Inner arm 39
The frame 6 provided by the pivot shafts 16 and 17 at the lower end of the roller arm is mounted outside the rolling arms 14 and 15. The vehicle body 10 has a horizontal frame 29 on the upper side and a vertical frame extending front and rear on both left and right lateral ends of the horizontal frame 29.
In the case of a combine, for example, a threshing device, an engine, a control device, and the like are mounted on the upper side, and the harvesting device is supported. Reference numeral 44 denotes a transmission case in which a traveling transmission for transmitting the driving sprocket 30 is provided, and the brackets 26 and 45 and the axle housing 32 are provided.
It is integrally attached to the front end or the rear end of the vehicle body 10 through the like. The crawler 4 includes the driving sprocket 30
And the rolling wheels 5 are wound around and stretched, and can be rotated and driven by the driving of the driving sprocket 30. The bracket 26 of the vehicle body 10 is
0 is located forward of the frontmost wheel 5 and the vehicle body 10
Is rotated up and down around the pitching axis 7 by the pitching, but is configured to maintain the tension driving of the crawler 4. 46 is an exhaust pipe of the engine, and 47 is its muffler cover. Referring to FIGS. 8 and 9, the control structure of the traveling device will be described. As shown in FIG. 8, a hydraulic circuit 66 of a hydraulic pump P for hydraulically operating the rolling hydraulic cylinder 2, the pitching hydraulic cylinder 8, the cutting vertical cylinder 48 for moving the cutting device up and down with respect to the vehicle body 10, and the like is provided. The hydraulic circuit 67 of the cutting vertical cylinder 48 is provided with a cutting control valve 49 for raising the cutting and a cutting control valve 50 for lowering the cutting so as to operate electromagnetically. The hydraulic circuit 68 of the pitching hydraulic cylinder 8 includes the vehicle body 10 with the pitching shaft 7.
Rotate around and pitch down and rotate backward and downward,
Conversely, a pitching control valve 51 is provided for switching to rotate backward and upward. A rolling control valve 52 is provided in each of the hydraulic circuits 69 of the pair of left and right rolling hydraulic cylinders 2 so as to switch the left or right scroller frame 6 up or down independently or simultaneously. . 53 is an unload valve. In addition to the above, the hydraulic circuit 66 includes a hydraulic clutch 7 of a steering cylinder 70 for operating the transmission clutches of the left and right crawler 4 and the brakes to steer the traveling direction to the left and right.
1 and a steering control valve 72 which is electromagnetically switched and interlocked by operation of the steering lever. Also, an auger for extracting threshed and harvested paddy from the paddy tank is rotated left and right or up and down to select an extraction position, such as an auger turning cylinder 73 and an auger vertical cylinder 74. A hydraulic circuit 75 is provided, and auger control valves 76 and 77 which are electromagnetically switched and operated by an operation lever are provided. In FIG. 9, a controller 54 having a microcomputer is provided with a manual tilt lever switch 55 on the input side, and the lever switch 55 and the manual tilt lever are provided in a steering device. By tilting by the operation of the manual tilt lever, each tilt lever switch is turned ON according to the tilt direction, and the pitching control valve 51,
By switching and outputting the rolling control valve 52, the vehicle body 10 is pitched, and the left or right scroller frame 6 is operated.
Are moved up and down to perform a rolling operation. Also, a vehicle height vertical lever switch 56 and a vehicle height vertical lever for switching the vertical lever switch 56 are provided.
Is provided in the control device, and the up / down lever switch 56
When the vehicle is operated to raise the vehicle height, the left and right rolling control valves 5
When the vehicle height 2 is switched to the raising side and the vehicle height is raised, and when the vehicle height is lowered, the left and right rolling control valves 52 are switched to the lowering side and the control output is lowered so as to lower the vehicle height. Is done. The cutting lever switch 57 switches between the cutting upper and lower control valves 49 and 50.
The reaping device is controlled to move up by the reaping control, and the reaping control valve 50 is controlled to move down. The vehicle body horizontal switch 58 is used to control the left and right rolling of the pitching frame 1 and the front and rear pitching control. The cereal stalk sensor 59 detects that the stalk is being harvested by the reaping device. The stalk sensor 59 performs the above-described control by the front-rear inclination sensor 60, the left-right inclination sensor 61, and the respective strobes. Sensors 62, 63 and 64 are provided. Each of the tilt sensors 60, 61 and the stroke sensors 62, 63,
A sensitivity changing means 65 for changing these sensitivities is provided in 64 or the like. With respect to the pitching control of the vehicle body 10, when the front-rear inclination sensor 60 detects the front-rear inclination of the vehicle body 10, the pitching control valve 51 is switched to the rear lower position or the rear upper position, thereby expanding and contracting the pitching hydraulic cylinder 8. The front and rear struts provided in the pitching hydraulic cylinder 8
The vehicle body 10 is controlled and maintained in a front-rear horizontal state by performing feedback control based on detection by the sensor 62. The rolling control of the pitching frame 1 is performed by detecting the left and right inclination of the vehicle body 10 or the pitching frame 1 by the left and right inclination sensor 61, so that the left rolling control valve 52 or the right -By switching the ring control valve 52, the left and right rolling hydraulic cylinders 2 are expanded and contracted, and the feedback control is performed while detecting the amount of expansion and contraction of each of the rolling hydraulic cylinders 2 by the left and right stroke sensors 63 and 64. Thus, the pitching frame 1 is controlled and maintained in the horizontal state. The height of the pitching frame 1 is controlled as follows.
The right and left rolling control valves 52 and the rolling hydraulic cylinder 2 are simultaneously or preferentially performed with the rolling control, and are provided with a height sensor for detecting the height of the pitching frame 1 with respect to the soil surface. Is controlled so as to be maintained at a constant height by expanding and contracting. As the height sensor, the height may be detected by the average value of the stroke sensors 63 and 64 of the rolling control. 8 to 10, the operation control relationship between the rolling hydraulic cylinder 2 and the pitching hydraulic cylinder 8 and the other cutting vertical cylinders 48 and the like will be described.
Ring hydraulic cylinder 2 or pitching hydraulic cylinder 8
Is operated by the rolling control valve 52 or the pitching control valve 51 in the extending direction, that is, the direction in which the crawler 4 is pushed down and the vehicle body 10 is pushed up. 49 to raise the mowing device or to move the steering cylinder 7
When the steering control valve 72 is operated by expansion and contraction by the steering control valve 72, the rolling control valve 52 and the pitching control valve 51 are stopped at the neutral position, and the rolling hydraulic cylinder 2 and the pitching cylinder 8 are extended. Body 10 by taking out
Stop pushing up. During this time, the harvesting control valve 4
When the extension of the cutting vertical cylinder 48 by 9 or the operation of the steering cylinder 70 by the steering control valve 72 is completed, the rolling control valve 52 or the pitching control valve 51 or the like is output. As described above, when the cutting vertical cylinder 48, the steering cylinder 70, etc., compete with the operation of the rolling hydraulic cylinder 2, the pitching hydraulic cylinder 8, etc. as the priority control cylinder, these hydraulic cylinders 2 , 8 etc., with priority. In addition, the rolling hydraulic cylinder 2 and the pitching hydraulic cylinder 8 only need to be limited in operation in the operation stroke in the direction of pushing up the vehicle body 10, and stop the operation control of the vehicle body 10 as well as the pushing side at the same time. Check control may be performed as follows. In the case of FIG. 8, the auger control cylinders 73 and 74 are not priority control cylinders. For this reason,
The rolling hydraulic cylinder 2 and the pitching hydraulic cylinder 8 are operated simultaneously with the operation of the auger control cylinders 73 and 74.
, Etc., may be performed. FIG. 11 to FIG.
Are divided into a control box A for controlling the horizontal level of the vehicle body which performs rolling control and pitching control, and a control box B which performs steering control and a cutting height control for moving the cutting device up and down. , Each control box A,
A control signal line 78 for controlling the hydraulic output is provided between the control boxes A and B, and the communication is performed by a pulse signal. As shown in FIG. 12 and FIG.
Then, when the vehicle enters the restraining state D, the rolling control valve 52 for controlling the vehicle body horizontal control and the solenoid output of the pitching control valve 51 are turned off by the pulse signal, and the rolling control and the pitching control are temporarily stopped. When the control by the control valve 72, the reaping control valve 51, the reaping control valve 50, and the like is completed, the vehicle body horizontal control is started.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a traveling device. FIG. 2 is an exploded side view showing the traveling device. FIG. 3 is a plan view of the traveling device. FIG. 4 is a front sectional view taken along the arrow IV in FIG. 1; FIG. 5 is a side view of a part of FIG. 4; FIG. 6 is a front sectional view taken along the arrow VI in FIG. 1; FIG. 7 is a side view of a part of FIG. 6; FIG. 8 is a hydraulic circuit diagram. FIG. 9 is a control block diagram. FIG. 10 is a partial control flowchart. FIG. 11 is a block diagram showing another embodiment. FIG. 12 is an explanatory diagram of a control signal. FIG. 13 is a partial control flowchart. [Description of Reference Numerals] P hydraulic pump 2 b - the hydraulic cylinder 4 black for Ring - la 6 Black - Rafre - upper arm 8 the hydraulic cylinder 10 the vehicle body 48 for pitching reaper reaper cylinder 49 for vertical control valve 50 reaper under control valves 51 control valve 52 for pitching Russia - ring for the control valve 55 manually tilt switch 56 vehicle height vertical motion of the switch 57 reaper lever - switch 60 longitudinal inclination sensor 61 lateral inclination sensor 62 before and after the stroke - Kusensa 63 stroke - Kusensa 64 stroke - Kusensa 66 hydraulic circuit 67 a hydraulic circuit 68 a hydraulic circuit 69 a hydraulic circuit 70 steers for the cylinder 71 the hydraulic circuit 72 control valve for steering

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI B62D 55/116 B62D 55/116 E02F 9/02 E02F 9/02 B (56) References JP-A-64-2511 (JP, A JP-A-63-7712 (JP, A) JP-A-63-177705 (JP, A) JP-A-58-11138 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01D 41/02 A01B 69/00 302 A01D 34/24 A01D 67/00 A01F 12/46 B62D 55/116 E02F 9/02

Claims (1)

(57) placed to the Claims 1 A hydraulic circuit 66 of the same hydraulic pump P
And the hydraulic circuit 67 of the cutting vertical cylinder 48
The cut-up control valve 49 for ascent and the cut-down control valve for cut-down.
And 50 are provided so as to operate electromagnetically, and are provided for pitching.
In the hydraulic circuit 68 of the hydraulic cylinder 8, the vehicle body 10
Pitching and vice versa
A pitching control valve 51 for switching
Of the pair of right and left rolling hydraulic cylinders 2 and 2
The pressure circuit 69 is provided with the left or right scroll frame 6.
Left and right switches that switch up and down independently or simultaneously
-Providing control valves 52, 52 for rings,
Operate the transmission clutch etc. of No. 4 to steer the running direction left and right
The hydraulic circuit 71 of the steering cylinders 70, 70
Steering control valve that is electromagnetically switched and interlocked by lever operation
72, and the harvester is operated by operating the harvesting lever switch 57.
Switching harvesting control valve 49 and harvesting control valve 50 to harvest
Raising the mowing device or controlling the mowing under the control valve 49
The mowing device is configured to be lowered by the valve 50,
When the manual tilt switch 55 provided on the vertical device is operated,
The pitching and rolling control valves 51, 52,
52 is switched so that the vehicle body 10 starts pitching or
Move the right or left cradle frame 6, 6 up and down to
It is constructed so that the ring operates, and the height above the vehicle mounted on the control device
When the lower switch 56 is operated to raise the vehicle height, the left and right
The control valves 52, 52 for the rings are switched to the up position;
While raising the vehicle height, the switch 56 for raising and lowering the vehicle height is set to the vehicle height.
When operated to the lower side, the control valves 52 for left and right rolling,
52 is switched to the lower side and the vehicle height is lowered.
However, in pitching control, the front-rear inclination sensor 60
When the inclination of the vehicle body 10 in the front-rear direction is detected,
Switching the control valve 51 for pitching and hydraulic pressure for pitching
The cylinder 8 is extended and retracted, and this pitching hydraulic
The front and rear stroke sensors 62 detect the amount of expansion and contraction of the
The vehicle body 10 is horizontally moved in the front-rear direction by feedback control.
Configuration that can be maintained in the state
The left and right inclination sensor 61 detects the left and right inclination of the vehicle body 10
Then, by this, the control valve 52 for left rolling or
Right of Russia - of the left and right to switch the control valve 52 for the ring Russia - Li
The hydraulic cylinders 2 and 2 are extended and retracted,
Stroke of the hydraulic cylinders 2 and 2
Feedback control while detecting with the sensors 63 and 64
The vehicle body 10 can be controlled and maintained in a horizontal state.
And a hydraulic system for pitching and rolling.
The cylinders 8, 2, 2 for cutting and raising and lowering
Operation control relationship with cylinders 70, 70
Are hydraulic cylinders 8 for pitching or rolling,
2 and 2 are control valves 51 and 5 for pitching or rolling.
The crawlers 4 and 4 are pushed down by the
When operating in the direction to push up
Cylinder 48 is operated by the harvesting control valve 49
When the reaper is raised or the steering cylinder 70,
70 is operated by a steering control valve 72 for steering.
In this case, the control valve 5 for pitching and rolling is used.
1, 52, 52 are stopped at the neutral position and pitching and
Vehicle by operation of hydraulic cylinders 8, 2, 2 for rolling
The lifting of the body 10 shall be stopped and during this time
Cutting up of the cylinder 48 for cutting up and down by the upper control valve 49
Completion of the lifting operation or steering by the control valve 72 for steering
When the steering operation of the cylinders 70, 70 is completed,
Thus, the pitching or rolling stopped at the neutral position
The control valves 51, 52 and 52 for rings are switched and output to
For hydraulic cylinders 8, 2, 2 for pitching or rolling
The operation in the direction of pushing up the vehicle body 10 is resumed.
Hydraulic control device for Konbai down, characterized in that the sea urchin configuration.