JP3762540B2 - Vehicle height level controller in the combine. - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combine, and more particularly to a vehicle height level control device when a combine machine is turning.
[0002]
[Prior art]
Conventionally, the vehicle height level control of the combine has been achieved by the input of an auto lift switch provided on the main shift lever, that is, a switch that automatically turns off the cutting clutch when raising the cutting unit to a certain height. Leveling control was prohibited by detecting turning.
[0003]
[Problems to be solved by the invention]
However, when the harvesting is performed without using the auto lift switch when turning the combine, the tilt sensor signal is erroneously output due to the centrifugal force during turning, causing the horizontal control to malfunction. .
[0004]
The present invention has been made to solve these problems. When leveling the vehicle height of the fuselage, the level control is prohibited when the traveling speed exceeds a certain value, and the safe traveling of the combine is achieved. The purpose is to obtain.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a vehicle height level control device for a combine as described below.
That is, in the combined vehicle height level control device for horizontally controlling the vehicle height, the steering means is operated to turn when the output of the vehicle speed sensor that detects the traveling speed of the aircraft is above a certain value. When the straight travel detection switch is detected, the stock detection sensor of the handling depth automatic control means is OFF, and the cutting switch for operating the cutting clutch on / off by the working clutch lever satisfies all the conditions of ON A vehicle height level control device for a combine, wherein a delay time is provided before the control is prohibited and the horizontal control prohibition is canceled.
Further, in a combined vehicle height level control device for horizontally controlling the vehicle height of the fuselage, when the main speed change lever is shifted to the forward movement position, it is detected that the steering means is operated in a turning direction and is detected to go straight. When the switch is OFF, the stock detection sensor of the automatic handling depth control means is OFF, and the cutting switch for operating the cutting clutch by the working clutch lever satisfies all the ON conditions, the horizontal control is prohibited. In addition, the present invention is a vehicle height level control device for a combine, characterized in that a delay time is provided until the horizontal control prohibition is canceled.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment in which the present invention is applied to a combine will be described.
FIG. 1 is a side view of a combine (1) having a pair of left and right traveling devices (2) provided with a traveling crawler (2a), and FIG. 2 is a plan view of the combine (1), (1a) (1b ) Is a track frame on which the left and right traveling crawlers (2a) and (2b), which are traveling units, are installed, (3) is a machine base installed on the track frames (1a) and (1b), and (4) is a feed chain (5). A threshing unit that is stretched on the left side and incorporates a handling cylinder (6) and a processing cylinder (7), (8) is a cutting part provided with a cutting blade (9), a culm conveying mechanism (10), and the like (11 ) Is a hydraulic cutting lift cylinder that raises and lowers the cutting part (8) via the cutting frame (12), (13) is a slaughter processing part that faces the terminal end of the sewage chain (14), and (15) is a threshing part (4). ) Grain tank that carries the grain from the milling cylinder (16), (17) is the front A discharge auger for unloading the grain of the tank (15), (18) a driving cabin provided with a driving operation part (19) such as a steering handle (19b) and a driver seat (20), and (21) a driving cabin. (18) It is an engine provided below, and is configured to continuously harvest and thresh cereals.
[0007]
As shown in FIGS. 3 and 4, the left and right traveling crawlers (2a) and (2b) are attached to a transmission case (22) on the machine base (3) side and a drive sprocket (23) and the track frame (1a). (1b) is supported by a plurality of track rollers (24), an equalizer wheel (25), and an idler wheel (26), and the track frame (1a) (1b) is supported by a front and rear pivot shaft (27) ( 28) and the front and rear bell crank links (29) and (30) are supported on the machine base (3) so as to be movable up and down.
The crank links (29) and (30) are intermediately connected to the front and rear connecting horizontal frames (31) and (32) at the lower part of the machine base (3) via the bearings (33) and (34) and the support shafts (35) and (36). Each of the pivot shafts (27) and (28) is rotatably supported on one end side of the link (29) and (30), and the front and rear crank links (29) and (30) are supported. The left and right hydraulic lifting cylinders (41) are connected to each other through the shafts (37) and (38) and the rod (39), and the base end is pivotally supported on the machine base (3) via the bracket (40). ) (42) The other end of the rear crank link (30) is connected to the tip of the piston rod (41a) (42a) via the pivot (43), and the left and right traveling crawlers (2a) (2b) are respectively provided. Piston rod (4) of cylinder (41) (42) a) By moving the (42a) appropriately, the left and right track frames (1a) (1b) are moved up and down separately from the machine base (3), and the machine base (2a) (2b) 3) The support height, that is, the vehicle height (H) is made variable.
[0008]
Further, left and right vehicle height sensors (44a) and (44b) for detecting the vehicle height (H) are swingable integrally with the arm shaft (45) of the machine base (3) so as to be swingable integrally with the first and second swing arms (46). ) (47) is supported, the distal end of the first swing arm (46) and the shaft (38) are connected by the first detection rod (48), and the sensor case ( 49) The tip of the second swing arm (47) of the meter arm (51) of the potentiometer (50) to be installed in the inside of the potentiometer (50) is connected by the second detection rod (52), and the left and right lifting cylinder (41) ( When the crank link (30) swings, that is, the vehicle height (H) changes by the expansion and contraction operation of (42), the amount of change is detected by the potentiometer (50).
[0009]
As shown in FIG. 5, the operation panel (19a) of the driving operation section (19) has a priority manual switch (53) which is a cross-tilt type manual operation member for adjusting the vehicle height and the left / right inclination by manual operation, The main and sub transmission levers (54) and (55) for shifting the running speed, the threshing clutch lever (56) for turning on and off the threshing clutch, and the vehicle height (H) as a reference for the machine base (3) are stepless. The vehicle height setting volume (57) to be set to, the tilt angle setting volume (58) to set the left and right inclination angles as the basis of the machine base (3) in a stepless manner, and the comprehensive display for performing various displays and setting operations such as the vehicle speed And a controller (61) in the operation panel (19a). A tilt angle sensor (60) such as a pendulum type that detects the horizontal tilt of the machine base (3) and a controller (61) are provided.
Further, a rectilinear detection switch (93) is provided at the lower end of the steering handle (19b), and has a function of detecting the rectilinear operation of the aircraft.
[0010]
As shown in FIG. 6, a cutting / lifting switch (62) for adjusting the cutting portion (8) up and down on the front right side of the knob (54a) of the main transmission lever (54) and a threshing portion (4) on the left side of the front surface. A handle depth switch (63) is provided to adjust the handle depth of the cereals to be inserted into the knob, and the cutting part (8) is raised to a certain height on the right side of the knob (54a) on the driver seat (20) side. An auto lift switch (64a) that automatically turns off the mowing clutch when it is operated, and an auto set switch (64b) that automatically turns on the mowing clutch when the mowing portion (8) is lowered to a certain height. While holding the main speed change lever (54) with the left hand, use the thumb to handle the auto lift and auto set switches (64a) and (64b), the index finger to the cutting lift switch (62), and the middle finger to handle the depth. Switch (63) are configured to operate respectively.
Further, a position detection switch (94) (or position detection potentiometer) for detecting the shift position when the lever (54) is shifted to the forward movement position is provided on the lower end side portion of the main transmission lever (54). It has been.
[0011]
As shown in FIG. 7, an electromagnetic switching valve (65) (66) for driving and controlling the left and right hydraulic lifting cylinders (41) and (42) and an electromagnetic for driving and controlling the lifting cylinder (67) of the discharge auger (17). A hydraulic control pump (70) is connected to the switching valve (68) and the electromagnetic switching valve (69) for driving and controlling the lifting cylinder (11) of the cutting part (8), and a flow control valve (71) is formed. The solenoid switching valve (69) is connected to the hydraulic pump (70) through the relief valve (72), and the check valve (75) and the check valve (75) formed by the check valve (76) and the throttle valve (74) 76) is connected to the A port (A) of the electromagnetic switching valve (69) through the lift cylinder (11), and the high pressure oil of the hydraulic pump (70) driven by the engine (21) is supplied to the electromagnetic switching valve. ( 9) and the other switching valves (65), (66) and (68) are connected to the B port (B) of the electromagnetic switching valve (69). Yes.
[0012]
Further, a variable throttle type lifting speed control valve (77) and a manual emergency lowering valve (78) provided in parallel are connected to the lifting cylinder (11) via a slow return valve (75), and the lifting speed control valve (77) or The hydraulic oil of the elevating cylinder (11) is returned to the oil tank (79) via the emergency lowering valve (78) and is formed by a proportional electromagnetic hydraulic switching valve having a pulse width modulation control (PWM) speed regulating solenoid (80). And a throttle valve (82) of the flow control valve (71) is connected to a pilot port (83) of the elevating speed control valve (77) via the high-speed response solenoid valve (81). ing.
[0013]
When the electromagnetic switching valve (69) is switched and the cutting part (8) is raised by the elevating cylinder (11), the speed regulating solenoid (80) is operated by pulse width modulation control (PWM), and the electromagnetic valve (81) is used. The pilot pressure adjusted to an appropriate hydraulic pressure acts on the elevation speed control valve (77), the degree of throttle of the control valve (77) is arbitrarily changed, and the operating speed is set according to the degree of throttle of the control valve (77). When the trimming part (8) is raised by the adjusted lift cylinder (11), and when the harvesting part (8) is lowered, the electromagnetic switching valve (69) is switched to the neutral or B port (B) side. The solenoid valve (81) is operated by pulse width modulation control (PWM) in the same manner as described above, the throttle opening degree of the elevating speed control valve (77) is adjusted by adjusting the pilot pressure, and the hydraulic cylinder (11 It is configured so as to lower the regulated to reaper the operating speed of (8).
[0014]
However, as described above, in a combine having a control device that detects turning by input of the auto lift switch (64a) and prohibits vehicle height level control, the auto lift switch (64a) is used when turning the combine. If the cutting is performed without moving up and down, the signal from the tilt angle sensor (60) is erroneously output due to the centrifugal force during the rotation, and the horizontal control malfunctions.
[0015]
Therefore, in order to eliminate the above inconvenience, the present invention is provided on the back side of the raising portion of the vehicle speed sensor (90) attached to the transmission case (22) and the cutting part (8) as shown in FIG. A stock detection sensor (91), a cutting switch (92) provided on the side column of the driving operation unit (19), and a straight-ahead detection switch (93) provided on the lower end of the steering handle (19b). Solenoids (65a) (65b), (66a), (66b) for raising and lowering electromagnetic switching valves (65), (66) that are respectively connected to the controller (61) and that drive-control the lifting cylinders (41, 42). Further, the controller (61) is connected to each other to perform horizontal control of the aircraft.
[0016]
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 certain value during the turn of the combine, the steering means is operated to turn. The straight detection switch (93) is detected, the stock detection sensor (91) of the automatic handling depth control means is OFF, and the cutting switch (92) for operating the cutting clutch on / off by the work clutch lever is ON. When all the conditions are satisfied, a horizontal control prohibition signal is output from the controller (61), and the upward and downward solenoids (65a) (65b), (66a) (66b) are excited to prohibit the horizontal control. The operation is started, and the combine moves to the turning operation. Further, by providing a delay time from the turning operation to the release of the horizontal control prohibition, more reliable vehicle height horizontal control can be obtained.
[0017]
Moreover, in the vehicle height level control as described above, in the wet field work, there are cases where the steering handle (19b) is turned off and the work of the level control function is applied. In such a case, The horizontal control becomes possible by turning on the stock detection sensor (91).
In addition, when cutting after turning, especially in wetlands, where the field is rough, horizontal control is required. In general, the vehicle speed may be slow in wetlands, so the vehicle speed sensor (90) keeps the vehicle running speed constant. Recognizing that the value is less than or equal to the value, the horizontal control is enabled by receiving a horizontal control prohibition release signal from the controller (61).
Furthermore, when the machine body is moved in the wet paddy by using the function of horizontal control, the cutting switch (92) is turned off, that is, the non-working state can be used for horizontal control.
On the other hand, when turning in dry fields, the speed of the aircraft drops during turning, and the effect of centrifugal force remains, but a delay time is set from prohibition of horizontal control to cancellation of prohibition, and horizontal control is prohibited during this period. Therefore, there is an advantage that malfunction prevention becomes possible.
[0018]
The above embodiment has been described with an example in which the vehicle speed sensor (90) is used as one of the conditions for prohibiting the horizontal control. However, instead of the sensor (90), as shown in FIG. ) Position detection switch (94) (or position detection potentiometer), when it is detected that the position of the main speed change lever is in the forward movement position, it is detected that the steering means has been operated in a turning direction, and detection of straight travel is detected. All the conditions that the switch (93) is OFF, the stock detection sensor (91) of the automatic handling depth control means is OFF, and the cutting switch (92) for operating the cutting clutch on / off by the working clutch lever are all satisfied. Sometimes, the horizontal control is prohibited in response to the horizontal control prohibition signal from the controller (61), the combine turning operation is reliably executed, and the same effect as the case of using the vehicle speed sensor (90) is obtained. Obtained.
[0019]
In addition, FIG. 10 relates to the improvement of the lifting cylinder for horizontal control. In the elevating cylinder (type: 1) as shown in FIG. 10 (a), when the vehicle height level control for adjusting the vehicle height and the left / right inclination by manual operation is performed, the priority manual switch (53) which is a manual operation member is operated. In this case, the left and right ascent valves are simultaneously turned on, and when descending, the left and right ascent valves are simultaneously turned on. However, when such control is performed, the right and left load balance is controlled by the amount of dredging in the grain tank (15). Since the cylinders (41) and (42) with the lighter load first reach the end, the inconvenience arises that they cannot move up and down horizontally.
[0020]
Therefore, in order to eliminate such inconvenience, as shown in FIG. 10 (b), instead of the right and left lifting cylinders (41) and (42), a single vertical lifting cylinder (95) connected to a common hydraulic circuit is used. In addition, by adopting an independent structure for each of the rotation cylinders (96) connected to the independent rotation hydraulic circuit (type: 2), the vehicle height vertical lift cylinder (95) is driven during manual up and down movement. For example, in the case of left rotation, the left end portion of the main body is supported as a fulcrum (S). Can function as tiltable.
According to such a configuration, the hydraulic circuit has a simple configuration, and in the case of turning control, the vehicle does not move up and down diagonally when the vehicle height is up and down, and the vehicle height and inclination can be adjusted easily and safely even manually. This eliminates the inconvenience that the left and right excess balance caused by the amount of dredging in the grain tank is different, and that it cannot move up and down horizontally.
[0021]
【The invention's effect】
As described above, in the vehicle height level control of the combine for horizontally controlling the vehicle height, according to the first aspect, the operation is performed when the output of the vehicle speed sensor for detecting the travel speed of the aircraft is a predetermined value or more. When the direction detecting means is operated to turn, the straight detection switch is OFF, the stock detection sensor of the handling depth automatic control means is OFF, and the cutting switch for operating the cutting clutch on / off by the work clutch lever is When all the ON conditions are satisfied, the horizontal control is prohibited and the delay time is set until the horizontal control prohibition is canceled, so that the malfunction of the horizontal control is prevented and the accuracy of the horizontal control can be improved. Also, under these conditions, in wetland work, when working with the horizontal control function in effect with the steering wheel turned off, the stock control sensor can be turned on to enable horizontal control. . Furthermore, when cutting after turning, especially in wet fields, the field is rough, so the traveling speed of the machine decreases, so the vehicle speed sensor is activated and horizontal control becomes possible. Still further, by switching the cutting switch to OFF, the cutting can be brought into a non-working state so as to shift to horizontal control.
According to the second aspect of the present invention, when the main speed change lever is shifted to the forward movement position, it is detected that the steering means has been operated to turn, and the straight movement detection switch is turned off, and the automatic handling depth is turned off. When the stock detection sensor of the control means is OFF and the cutting switch for operating the cutting clutch on / off with the work clutch lever satisfies all the ON conditions, the horizontal control is prohibited and the horizontal control prohibition is canceled Since the delay time is set, the operator himself can surely confirm the horizontal control, and there is a remarkable effect that the erroneous operation of the turning operation is prevented.
[Brief description of the drawings]
1 is a side view of a combine. FIG. 2 is a plan view of the combine. FIG. 3 is a side view of a crawler. FIG. 4 is a back view of the crawler. FIG. Explanatory drawing of the main transmission lever [FIG. 7] Hydraulic circuit diagram [FIG. 8] Control circuit diagram of the first embodiment [FIG. 9] Control circuit diagram of the second embodiment [FIG. 10] (A) Lifting cylinder (Type 1) ) Schematic diagram (b) Schematic diagram of lifting cylinder (type 2) [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combine 2 Traveling apparatus 2a, 2b Traveling crawler 8 Cutting part 15 Grain tank 19b Steering handle 20 Driver's seat 22 Mission case 24 Track roller 25 Equalizer wheel 26 Idle wheel 41, 42 Left / right lifting hydraulic cylinder 54 Main transmission lever 61 Controller 64a Auto lift switch 64b Auto set switch 65a Lift solenoid 65b Drop solenoid 69 Electromagnetic switching valve 70 Hydraulic pump 90 Vehicle speed sensor 91 Stock detection sensor 92 Cutting switch 93 Straight line detection switch 94 Position detection switch 95 Vertical lift cylinder 96 Rotary cylinder

Claims (2)

In the combined vehicle height level control device that controls the height of the vehicle body, when the output of the vehicle speed sensor that detects the traveling speed of the vehicle body is above a certain value, it is detected that the steering means has been operated to turn. When the straight detection switch is OFF, the stock detection sensor of the handling depth automatic control means is OFF, and the cutting switch for operating the cutting clutch on / off by the working clutch lever satisfies all the ON conditions, the horizontal control is performed. A vehicle height level control device in a combine, wherein a delay time is provided before the prohibition and the horizontal control prohibition is canceled. In a combined vehicle height level control device for level control of the vehicle height of the fuselage, when the main speed change lever is shifted to the forward movement position, the straight travel detection switch Level control is prohibited and level control is disabled when the stock detection sensor of the handling depth automatic control means is OFF, and the cutting switch for operating the cutting clutch by the working clutch lever satisfies all the ON conditions. A vehicle height level control device in a combine, characterized in that a delay time is provided until the control prohibition is released.

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