JPH09163814A - Tilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilling device capable of uniformly forming the width of a butt in a small size to simplify a tilling work in the butt. SOLUTION: In this tilling device in which a work machine (14) is liftably mounted on a tractor (1) and in which an output control member for controlling the rotation of an engine (2) is disposed, a controller is disposed. The controller is used for automatically controlling the rotation of an engine (2) with an output control member for increasing the rotation rate of the engine, when the work machine (14) is lowered to a height at which the work machine is inserted in the soil of a field and supported. Since the rotation rate of the engine is thereby automatically increased just before the tilling work is started, it can be prevented than an operation for increasing the rotation rate of the engine is delayed after the tractor is turned at the butt of the field, and the tillage is stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling device for pulling a tilling rotary working machine for tilling work by a tractor.

[0002]

2. Description of the Related Art Conventionally, a tilling rotary working machine is installed on the rear side of a tractor so as to be able to move up and down, and this rotary working machine is used to perform the tilling work. However, the tractor traveling speed during the tilling work is increased to perform the work as quickly as possible. It was hoped to end.

[0003]

In the above-mentioned prior art, the efficiency of tilling work can be improved by increasing the traveling speed. However, when the tractor is turned in the headland of the field, the tractor is decelerated and turned. It is necessary to speed up again to start the next step tilling work, and by performing the acceleration / deceleration operation in addition to the raising / lowering operation of the working machine and the steering operation of the handle, the operation when changing the tractor direction is extremely There is a problem that it becomes complicated and the field headland width for changing direction tends to be large, and if the speed-up operation is delayed at the start of tilling, the tilling force becomes insufficient and the tilling depth becomes unstable. In addition, since the speed is increased at the start of tilling, the traveling distance until reaching the predetermined tilling depth becomes large, and there is a problem that residual plowing is likely to occur. However, there is a problem in that it is not possible to easily prevent the rising and the dashing.

[0004]

SUMMARY OF THE INVENTION However, according to the present invention, in a cultivating apparatus in which a working machine is mounted on a tractor so as to be able to move up and down, and an output adjusting member for controlling the rotation of an engine is provided, the working machine plunges into the soil. A controller that automatically controls the engine rotation of the output adjustment member that accelerates when it descends to the support height is provided.Because the engine is automatically accelerated immediately before the start of plowing, It is possible to easily prevent the speed-up operation from being delayed after the direction is changed, and it is possible to easily eliminate the problem that the tilling depth becomes unstable due to insufficient plowing force and the problem that the headland width becomes large due to the occurrence of residual tillage,
By making the headland width small and uniform, it is possible to easily simplify the tilling work in the field headland.

Also, a pressing member for forcibly lowering the working machine is provided, and the pressing member operates to press the working machine against the soil surface when the working machine descends to the earth plunge height and the engine speeds up. It is possible to shorten the traveling distance until the working depth is stabilized when the working machine is lowered to start the tilling work.
Further, it is possible to reduce the rise of the soil at the beginning of the plowing, which scatters the cultivated soil on the upper surface of the rear uncultivated land, and to prevent the dashing in which the plowing force acts as the forward traveling force of the tractor.

Further, the top link for supporting the working machine together with the lower link so as to be able to move up and down is formed by a telescopic member so as to be able to expand and contract, and when the working machine descends to the earth plunge height and the engine speeds up, the working machine is soiled. The automatic expansion / contraction member that presses against the surface can shorten the travel distance until the working depth is stabilized when the work machine is lowered to start the tilling work, and the cultivated soil is scattered on the upper surface of the rear uncultivated land. It is possible to reduce the rise of soil at the start of plowing and to prevent dashing in which the plowing force acts as the forward traveling force of the tractor.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a side view of the entire tilling control circuit, FIG. 2 is a side view of the whole, FIG. 3 is a plan view of the same, and FIG. 4 is a side view of the rotary working machine section. In the figure, (1) is a tractor, which is provided with left and right front running wheels (4) and (4) on both sides of a bonnet (3) in which an engine (2) is installed.
A steering handle (5) is provided in the rear part, a driver's seat (6) is installed behind the handle (5), and left and right rear running wheels (7) and (7) are installed outside both sides of the driver's seat (6). At the same time, the left and right brake pedals (9) and (9) and the clutch pedal (10) are arranged in the step (8) on the front side of the driver's seat (6),
The worker is configured to sit on the driver's seat (6) and travel.

Further, a tillage rotary working machine (1) is mounted on a mission case (11) for driving the traveling wheels (4) and (7) via a lower link (12) and a top link (13).
4) is attached and the working machine (14) is mounted on the rear side of the tractor (1) so as to be able to move up and down.
5), a position control lever (16) for manually raising and lowering the working implement (14), and an elevating switch (17) for raising and lowering the working implement (14) to a direction-changing rising position and a plowing work lowering position by one-touch operation. ) Is arranged on the right side of the driver's seat (6), and the auxiliary traveling speed change lever (18) and the PTO speed change lever (19) for changing the output to the working machine (14) are installed in the driver's seat (6). Place it on the left side.

Further, as shown in FIGS. 4 to 7, a gear box (20) is arranged at the center of the working machine (14),
The power is transmitted from the PTO shaft (21) of the tractor (1), the beams (22) are projected to both sides from the side surface of the gearbox (20), and the support plates (23) are provided at the midpoints of the beams (22). Is fixed, the lower link (12) is connected to the front end of the support plate (23), the front end of the depth frame (24) is pivotally supported at the rear end of the support plate (23), and the depth frame (24) Left and right tail wheels (25) (25) are provided on the rear end side.

An upper part of the chain case (26) and an upper part of the side support (27) are fixed to the outer end of the beam (22), and the tiller claw shaft (28) is provided between the lower part of the chain case (26) and the lower part of the side support (27). ) Is horizontally installed, and a large number of rotary claws (29), which are nata claws, are radially planted on the cultivating claw shaft (28) in a side view, and the upper part of the rotary claw (29) is rotated. Rotary cover (3
0) and both sides are covered by side covers (31). The tiller claw shaft (28) is driven through the gear in the gear box (20), the transmission shaft in the beam (22), the sprocket and the chain in the chain case (26), and the rotary claw (29) ... It can be cultivated by rotating the handle and the handle (3
By the rotating operation of 2), the rotary cover (30) can be rotated back and forth around the axis of the tillage claw shaft (28).

Then, a plate (33) fixed to the beam (22) is made to project forward, and the plate (33) is provided.
A support rod (34) is horizontally mounted on the front end, and a mounting plate (35) is fixed to the support rod (34).
The upper part of the cutting blade (36) is fixed to 5). In addition,
Four cutting blades (36) are attached to the outer side of the lower link (12) in the left-right width direction, and the middle portion of the cutting blade (36) is curved backward and inclined forward and backward.
The linear lower part of 6) is made to incline rearward in the front part of the rotation locus of the rotary claw (29). That is, the lower part of the cutting blade (36) is arranged so as to overlap with the front part of the rotation locus of the rotary pawl (29) in a side view, and the interval between the cutting blade (36) and the rotary pawl (29) is narrowed. I'm trying to prevent leftover cultivation. However, the two outer cutting blades (36) (36) are provided between the rotary claw (29) and the amplification rotary claw (37). Also, a cutting blade (36)
A partition plate (3) is provided between the rear surface and the rotary cover (30).
8) is provided. That is, the partition plate (38) is fixedly provided on the back surface of the cutting blade (36), and the partition plate (38) is brought close to the rotary cover (30) so that straws, weeds, etc. do not get caught and entangled. ing. In addition, the partition plate (3
8) is formed in a triangular shape so that the upper side can be fitted closely to the inner shape of the rotary cover (30) and the front side can be closely fitted and fixed to the shape of the rear surface of the cutting blade (36). The rear side has an arcuate shape that guides straw and the like downward. The width (plate thickness) of the partition plate (38) is made narrower than the width of the cutting blade (36) so that straw, weeds, etc. do not get entangled.

Further, a first steel plate rear cover (40) is vertically swingably connected to the rear end of the rotary cover (30) above the rotary pawl (29) via a first fulcrum shaft (39), 1 The rear end of the rubber second rear cover (41) is fixed to the rear end of the rear cover (40), and the flattened space (4
The front end of the third rear cover (43) made of a steel plate is fixed to the rear end of the second rear cover (41) forming (2), and the second fulcrum shaft (44) and the third rear cover (at the rear end of the first rear cover (40) are fixed. 43) The third fulcrum shaft (45) at the front end is connected by a pair of left and right links (46) (46), and a fourth fulcrum shaft (47) is provided substantially coaxially with the third fulcrum shaft (45).
The lower end of the first suspension rod (48) is connected to the fourth fulcrum shaft (47), and the pair of left and right second suspension rods (50) is connected to the fifth fulcrum shaft (49) at the rear end of the third rear cover (43). The lower ends are connected to each other, and the upper ends of the first and second suspension rods (48) (50) are attached to the support body (51) of the first rear cover (40) so that the suspension rods (48) (50) can be moved up and down. And a third rear cover (43) form a side view triangle, and the second, third and fifth fulcrum shafts (44) (45) (49).
A side view triangle is formed by a line connecting the two fulcrums, and the third rear cover (43) is moved upward about the second fulcrum shaft (44) or the third fulcrum shaft (45) to move the second fulcrum shaft (4
4) and suspension rods (48) (50) of the support (51)
The third lever cover (43) is moved rearward and upward by the operation of the lever mechanism with the connecting portion as a fulcrum, and both side portions of the third rear cover (43) are caused to perform a floating operation of moving back and forth in a plan view. Further, a pair of left and right gas dampers (52) are connected between the fifth fulcrum shaft (49) and the support body (51) of the first rear cover (40), and a small spring constant can be obtained with a large initial load and the stroke can be increased. The third rear cover (43) by means of a gas damper (52) that can be made even larger
And the tractor (1) can be leveled evenly when the tractor (1) is tilted to the left and right by evenly pressing the third rear cover (43) to the left and right.

Further, the upper end side of the suspension rods (48) (50) is loosely fitted and inserted into the bearing bodies (53) of the support bodies (51), and the pins are brought into contact with the upper surface side of the bearing bodies (53). (5
4) are planted in the rods (48) (50) to prevent the rods (48) (50) from being pulled out downwardly, restrict the forward movement of the third rear cover (43), and prevent the springs (55) ( 55) wound with a pair of left and right rods (5
6) The lower end of (56) is connected to the upper surface of the first rear cover (40), and the upper end of the rod (56) is attached to the rotary cover (3).
No. 0) is slidably attached to the support body (57) and the first rear cover (40) is elastically pressed downward by the spring (55).

Further, the rake support (58) is detachably fixed to the upper surface of the third rear cover (43), and the rake (59) fixed to the support (58) is extended to the rear of the third rear cover (43). A support body (51) to which the second suspension rod (50) upper end side is attached while being extended.
The upper end of the gas damper (52) is connected to the shaft (60) of the second damper, the second suspension rod (50) and the gas damper (52) are provided as close to each other as possible and substantially parallel to each other, and after the depth frame (24). A pair of left and right tail wheels (25) (25) are attached to the ends through a support frame (61), and left and right tail wheels (2
5) The rake (59) is arranged between the (25), and the tail wheel (25) prevents the rake (59) from colliding with a ridge or the like at the time of heading direction change, and while traveling on the road or The tail wheel (25) is also used as a bumper on the left and right outside of the rake (59) for maintenance work such as lifting up.

Further, the first fulcrum shaft (39) is attached at a position substantially the same as or higher than the upper end of the rotary locus of the rotary pawl (29), and the rear cover is centered on the first fulcrum shaft (39) during the plowing work. As (40), (41) and (43) rise, a large-area equalizing space (42) is formed below the rear covers (40), (41) and (43) behind the rotary locus of the rotary pawl (29). Rear cover (40) (4
1) (43) pushes the soil forward with rotary claws (2
9) Prevents reaching the soil flip-up part and increases the tilling load of the rotary claw (29) due to the plowing work at high speed. During the plowing work, the rotary claw (29) is pulled out to the ground. The rear covers (40), (41) and (43) are lifted by the cultivated soil and arranged on an arc line having a radius centered on the point where the rotary claw (29) has a rotation locus area of about 50% or more. The leveling space (42) is defined by the rotary pawl (29) rotation locus rear side and the rear cover (40) (4).
1) Small pieces such as fine or light debris formed between (43) are scattered by the rotary claws (29) to a high position on the lower surface of the rotary covers (40) (41), and large debris or heavy debris or stumps ( Large pieces such as rice stock are scattered to a lower position by the rotary claws (29), and the small pieces are in the upper layer and the large pieces are in the lower layer due to the specific gravity separation effect due to the scattering of the rotary claws (29), and the small pieces in the upper layer. Is leveled by the rear covers (41) (43),
The large rake is pushed further downward by the rear rake (59). Therefore, the air permeability and water permeability of the large soil can be maintained well by the large soil, and the surface layer of the soil can be formed by the small soil in a state suitable for sowing or seedling transplantation.

Further, four rotary pawls (29) are arranged at intervals of 90 degrees on the same circumference around the plowing pawl shaft (28).
Are attached, and the front ends of the rotary claws (29) are alternately curved in the left-right direction, and the four rotary claws (29) are arranged in a row.
Is provided in a plurality of rows in the direction of the axis line of the tiller shaft (28),
A gap is provided between the tips of the rotary claws (29) (29) that are adjacent to each other in the left-right direction, and the lateral lateral bending width of the rotary claw (29) is set to about twice the tip gap. (29) The rotary claw (29) is formed so that the base end interval is about 5 times larger than the tip end interval.
Further, the rotary claw (29) is curved in a scooping shape after cutting the soil, and the residual force of the tip clearances of the left and right rotary claws (29) (29) is crushed by the return force of elastic deformation of the rotary claw (29). The structure is such that the rotary pawls (29), which are about 70% of the number of conventional rotary pawls attached, are attached, and the rotational speed of the rotary pawls (29) is set to the conventional rotational speed (about 200 to 400 per minute). Rotation) and the traveling speed of the tractor (1) is about twice as fast as the conventional traveling speed (about 0.5 meters per second) to increase the working efficiency without increasing the plowing load compared to the conventional one. It is configured so that it can be doubled for plowing work. Further, the cutting blade (36) is thrust into the soil at a position where it overlaps the soil plunge point of the rotary claw (29) in a side view, and the soil plunge part of the cutting blade (36) is supported rearwardly. , And the left and right sides of the cutting blade (36) are formed as flat surfaces having a width,
The downward force that the cutting blade (36) enters into the soil by towing and the force that the soil to be incised presses against the side surface of the cutting blade (36) by the restoring force are generated as the pulling-out resistance force of the cutting blade (36). , The pulling resistance of the cutting blade (36) which is approximately equal to or slightly larger than the reaction force of the inrush resistance of the rotary claw (29) causes the reaction force of the inrush resistance of the soil to move the entire tilling rotary working machine (14) upward. The rotary pawl (29) is structured so as to be prevented from being lifted up and to absorb the impact generated by the plunge into the soil. On the rear side of the tillage pawl shaft (28), a reaction force of the pull-out force of the rotary pawl (29) is generated in opposition to the reaction force (lifting force) of the leveling force of the rear covers (40) (41) (43). , Balance of each reaction force stabilizes the posture.

Further, as shown in FIG. 1, a working sensor (62) for detecting that the tilling rotary working machine (14) is in the tilling operation by the tilling operation of the PTO speed change lever (19) and the ascending / descending operation. An electronic governor controller (6) that operates a switch (17) and a solenoid of an electronic governor (63) that increases and decreases the rotation speed of the engine (2).
4) and the continuously variable transmission mechanism (6) of the mission case (11)
5) a traveling speed change circuit (66) and a lowering valve (6) of a hydraulic lifting cylinder (67) for vertically moving a lower link (12) to raise and lower a tilling rotary working machine (14).
8) The ascending solenoid (681) and the descending solenoid (682) that actuate are connected to the controller (69) composed of a microcomputer, and the rotation speed of the engine (2) is changed by the electronic governor (63) control. Also, the traveling speed is changed by the traveling speed change circuit (66), and the working machine (14) is controlled by the lifting valve (68).
It is configured to change the support height.

Further, as shown in FIG. 8, the first fulcrum shaft (3
The rear cover sensor (70) such as a potentiometer or limit switch for detecting the operation of the first rear cover (40) which rotates up and down around the rotary cover (3) is attached to the rotary cover (3).
0) Provided on the upper surface, the rear cover sensor (7
0) is connected to the controller (69), and in the cultivating device in which the cultivating rotary working machine (14) is mounted on the tractor (1) so as to be able to move up and down, the cultivating rotary working machine (1)
4) A controller (69) is provided as switching means for reducing the traveling speed of the tractor (1) on the basis of the detection result of the sensor (70) for detecting the lowering of the rear cover (40) which can be raised and lowered freely to the non-tiling work position. ing. And in FIG.
When the tractor (1) reaches the edge of the ridge and the work implement (14) is raised as shown in the flow chart of FIG. 6, the rear cover (40) is lowered to the lowest position by the input of the rear cover sensor (70), and When it is detected that the machine (14) has been lifted to the non-working position on the ground, the engine (2) rotation speed lowering operation of the electronic governor controller (64) lowers the engine (2) rotation speed and reduces the traveling speed. When the tractor (1) reaches the field headland, the operation of raising the tilling rotary working machine (14) is performed to raise the tilling rotary working machine (14) and lower the rear cover (40). Is detected by the sensor (70),
The tractor (1) traveling speed is automatically decelerated by the controller (69), and the tractor (1) traveling speed is decelerated at substantially the same timing for each direction change at the time of changing direction in the field headland where plowing work is performed by reciprocating. Then, the headland having substantially the same width is formed only by the tractor (1) direction changing operation similar to the conventional one. On the other hand, when the tractor (1) is turned in the field headland and the working machine (14) is lowered, the working machine (14) is pushed down by the lifting switch (17).
When the descent of is detected, the electronic governor controller (6
The engine (2) rotation speed increasing operation of 4) increases the engine (2) rotation to increase and return the traveling speed, so that the plowing work is performed at high speed.

Further, as shown in FIGS. 9 and 10, the lift arm (71) for moving the lower link (12) up and down by hydraulic pressure and the ascending or descending operation of the arm (71) are fed back to stop the hydraulic pressure supply. A feedback link mechanism (72) that allows the lift arm (71) to move up and down.
A lift arm raising sensor (73) and a lift arm lowering sensor (74) for detecting via the respective sensors (7
3) (74) is connected to the controller (69), and is a lift for raising and lowering the tilling rotary working machine (14) in a tilling device in which the tilling rotary working machine (14) is mounted on the tractor (1) so as to be able to move up and down. A controller (69) is provided which is a switching means for decelerating the traveling speed of the tractor (1) based on the detection result of the sensor (73) for detecting the rise of the arm (71) to the non-tiling work position. Then, as shown in the flowchart of FIG. 17, when the tractor (1) reaches the edge of the ridge and the work implement (14) is raised,
When it is detected that the lift arm (71) is lifted by the input of the lift arm lifting sensor (73) and the working machine (14) is lifted to the non-working position on the ground, the engine (2) of the electronic governor controller (64) is detected. ) The operation of lowering the rotation speed lowers the rotation speed of the engine (2) and reduces the traveling speed. When the tractor (1) reaches the field headland, the operation of raising the tilling rotary working machine (14) is performed. By doing so, the sensor (7) indicates the lifting operation of the lift arm (71) that lifts the tilling rotary working machine (14) to the ground.
3) is detected, the traveling speed of the tractor (1) is automatically reduced by the controller (69), and at the time of changing direction in a field headland where plowing work is performed by reciprocating traveling, tractor ( 1) The traveling speed is reduced,
A headland having substantially the same width is formed only by a tractor (1) direction changing operation similar to the conventional one. On the other hand, when the lowering operation of the working machine (14) is performed after the direction change of the tractor (1) in the field headland is completed and the lowering of the working machine (14) is detected by the input of the lift arm lowering sensor (74), The operation of increasing the engine (2) speed of the electronic governor controller (64) increases the engine (2) rotation to increase and return the traveling speed, so that the plowing work is performed at high speed.

Further, as shown in FIGS. 11, 12 and 13, a hydraulic steering cylinder (76) is provided on the front axle case (75) in which the front running wheels (4) are mounted, and the front running wheels (4) are mounted. Turning tie rods (7
7) is connected to the piston (78) of the cylinder (76), and a turning angle detection rod (79) for detecting the turning angle of the front traveling wheel (4) is provided in the case (75), and the handle (5) ) To operate the cylinder (76), the piston (78) retracts and the tie rod (77) moves the plate (80) at a turning angle of the tractor (1) for turning the headland at a predetermined angle or more. ) To slide the cutting angle detection rod (79), the steel balls (82) (82) of the groove (81) of the rod (79) are pushed up, and the steering sensor (83) is moved toward the headland direction. While detecting that the turning angle is necessary for conversion, the cutting angle detection rod (79)
The steering sensor (83) detects that the steel ball (82) has returned to the groove (81) by returning to the straight position and the steering sensor (83) detects that the direction change of the tractor (1) is completed. In the tilling device for connecting to the tractor (1), the tilling rotary working machine (14) is mounted on the tractor (1) so as to be lifted and lowered, the tilling work of the tilling rotary working machine (14) is performed by operating the steering handle (5). A controller (69) is provided as a switching unit that reduces the traveling speed of the tractor (1) based on the detection result of the sensor (83) that detects the stopped state. Then, as shown in the flow chart of FIG. 18, when the tractor (1) arrived at the edge of the ridge and the steering handle (5) was turned, the front running wheel (4) was largely changed in direction more than when cultivating. When it is detected that the steering angle of the steering wheel (5) is more than a predetermined value by the input of the steering sensor (83), the work machine (14) is lifted by the lifting switch (17). It is in a state where it is lifted to the non-working position, and the operation of lowering the engine (2) rotation speed of the electronic governor controller (64) lowers the engine (2) rotation speed and reduces the traveling speed. When the tractor (1) reaches the steering handle (5), a turning operation of the steering handle (5) causes the sensor (83) to detect the suspension of the tilling work. Controller (6
9) The tractor (1) traveling speed is automatically reduced by the tractor (1) and the tractor (1) is changed at substantially the same timing for each direction change at the time of changing direction in a field headland where plowing work is performed by reciprocating movement.
The traveling speed is reduced, and a headland having substantially the same width is formed only by the conventional tractor (1) direction changing operation. On the other hand, when the direction change of the tractor (1) in the field headland is completed, the working machine (14) is lowered and the steering handle (5) is operated straight, the steering sensor (83) is input to the working machine (14). ) Landing of the tractor (1) is detected, and the engine (2) rotation speed is increased by the electronic governor controller (64) to increase the engine (2) rotation speed so that the traveling speed is increased and returned to high speed. It is configured so that plowing work is performed while traveling.

Further, as shown in FIG. 14, left and right brake sensors (84) and (84) for respectively detecting the depression operation of the left and right brake pedals (9) and (9) are provided, and the sensors (8)
4) (84) is connected to the controller (69), and when the direction is changed in the field headland, braking of the rear running wheel (7) inside the turning by operating the brake pedal (9) inside the turning is performed by the sensor (84). In the cultivating device for detecting and mounting the cultivating rotary working machine (14) on the tractor (1), the brake pedal (9) operation detects the cultivating work suspension state of the cultivating rotary working machine (14). A controller (6) that is a switching unit that reduces the traveling speed of the tractor (1) based on the detection result of the sensor (84).
9) is provided. Then, as shown in the flow chart of FIG. 19, when the vehicle reaches a ridge and depresses either the left or right turning inner brake pedal (9) to perform a turning operation, the left and right brake sensors (84) (84) are input to the left and right brakes. When one of the sensors (84) (84) is turned on to detect the stop of the plowing work and the start of the direction change, the working machine (14) is lifted to the non-working position on the ground by the raising operation of the elevating switch (17). When the tractor (1) reaches the farmland headland, the engine (2) rotation speed is lowered by the operation of lowering the engine (2) rotation speed of the electronic governor controller (64) to reduce the traveling speed. By operating either the left or right brake pedal (9) or (9), the brake pedal (9) on the inner side of the turn, the brake on the inner side of the turn that performs traveling braking on the inner side of the turn The direction in the field headland where the sensor (84) detects the suspension of the tilling work by the operation of the dull (9), the traveling speed of the tractor (1) is automatically reduced by the controller (69), and the tilling work is performed by the reciprocating traveling. At the time of change, the traveling speed of the tractor (1) is reduced at substantially the same timing for each direction change, and a headland of substantially the same width is formed only by a conventional tractor (1) direction change operation. On the other hand, when the direction change of the tractor (1) in the field headland is completed and the working machine (14) is lowered and the straight traveling is resumed, the brake release input of the brake sensor (84) causes the working machine (14) to move. When it is detected that the vehicle is going straight again by descending and cultivating, the engine (2) rotation speed is increased by the electronic governor controller (64) to increase the engine (2) rotation speed and restore the traveling speed. , It is configured to perform plowing work at high speed.

Further, as shown in FIG. 1, the engine (2) rotation speed is increased when the working machine (14) is lifted and the plowing work is stopped as compared with the case of the plowing work by the rotary plowing rotary working machine (14). A rotation sensor (85) for detecting that the speed is increased by a decrease is provided, and the sensor (85) is connected to the controller (69). The tractor is provided with a tilling rotary working machine (14) which can be moved up and down. In the tiller, a controller (switching means for decelerating the traveling speed of the tractor (1) based on the detection result of the sensor (85) for detecting the state of the tilling work suspension of the tiller rotary working machine (14) by the output change of the engine (2) ( 69) is provided. Then, as shown in the flowchart of FIG.
When the tractor (1) arrives on the edge of the ridge and the work machine (14) is raised, the work machine (14) is moved to the non-working position on the ground by inputting the rotation sensor (85) to raise the lift switch (17). It is detected that the output of the engine (2) is lifted and the output of the engine (2) is increased, and the operation of lowering the engine (2) rotation speed of the electronic governor controller (64) reduces the engine (2) rotation to reduce the traveling speed. , When the tractor (1) reaches the field headland, the tilling rotary working machine (1
4) is raised to stop the tilling work, whereby the sensor (85) detects a change in the output of the engine (2) due to the rise of the tilling rotary working machine (14), and the controller (69) causes the tractor (69). 1) The tractor (1) traveling speed is automatically decelerated and the tractor (1) traveling speed is decelerated at substantially the same timing for each direction change at the time of changing direction in a field headland where plowing work is performed by reciprocating travel. (1) A headland having substantially the same width is formed only by the direction changing operation. On the other hand, when the direction change of the tractor (1) in the field headland is completed and the working machine (14) is lowered, when the lowering operation of the working machine (14) by the lifting switch (17) is detected, The operation of increasing the number of revolutions of the engine (2) of the electronic governor controller (64) increases the rotation of the engine (2) to increase and return the traveling speed, and the cultivating work is performed at high speed.

Further, as shown in FIG. 1, an ultrasonic sensor (86) which is attached to the tilling rotary working machine (14) to detect the support height of the working machine (14) with respect to the uncultivated ground is provided, and The ultrasonic sensor (86) that also serves as a sensor
Which is connected to the controller (69), in a cultivating device in which the cultivating rotary working machine (14) is mounted on the tractor (1) so as to be able to move up and down, the cultivating rotary working machine (14)
A controller (69) which is a switching means for decelerating the traveling speed of the tractor (1) on the basis of the detection result of the sensor (86) for detecting the state of suspension of the tilling work of the tilling rotary working machine (14) by the height above ground. There is. And FIG.
As shown in the flow chart of 1, the tractor (1)
When the work machine (14) is reached and the work machine (14) is raised, it is detected by the ultrasonic sensor (86) that the work machine (14) has been lifted to a non-working position on the ground higher than the automatic working depth adjustment range. The engine (2) rotation speed lowering operation of the electronic governor controller (64) reduces the engine (2) rotation speed to reduce the traveling speed. When the tractor (1) reaches the field headland, Tillage rotary working machine (1
By performing the operation of raising 4), the sensor (86) detects the stop of the tilling work due to the ground height of the tilling rotary working machine (14), and the traveling speed of the tractor (1) is automatically detected by the controller (69). The speed of the tractor (1) is decelerated at almost the same timing for each direction change at the time of changing direction in the field headland where the land is cultivated by reciprocating. Forms a headland of approximately the same width. On the other hand, when the working machine (14) is lowered when the tractor (1) is turned in the field headland and the working machine (14) is lowered by the ultrasonic sensor (86) input, When the engine (2) speed is increased by the electronic governor controller (64), the engine (2) speed is increased and the traveling speed is increased and returned, so that the plowing work is performed at high speed, and the plowing rotary is used during the plowing work. The height of the working machine (14) with respect to the uncultivated ground is input from the ultrasonic sensor (86), it is determined whether or not the working depth of the rotary claw (29) is within the proper range, and the working depth is outside the proper range. When it changes, the lifting cylinder (67) is automatically controlled by the working depth automatic adjustment operation of the lifting valve (68) based on the detection result of the ultrasonic sensor (86), and the working depth of the rotary claw (29) is made substantially constant. To keep running speed Each automatic control of conversion and Kofuka regulation is configured to perform also serves as a ultrasonic sensor (86).

Further, each of the sensors (70) (73)
Based on the detection results of (74), (83), (84), (85), and (86), the traveling transmission circuit (66) is accelerated and decelerated to automatically control the continuously variable transmission mechanism (65), as in the above embodiment. ,
The traveling speed can be reduced when shifting from the tilling operation to the direction changing operation, and the traveling speed can be increased when shifting from the direction changing operation to the tilling operation, and the rear cover sensor (70) has a potentiometer type structure, Based on the detection result of the rear cover sensor (70), the lifting valve (6
The rear cover sensor (70) can also be used for adjusting the working depth of the rotary claw (29) by automatically controlling the working depth of 8) and automatically controlling the lifting cylinder (67).

Further, as shown in FIGS. 1 and 15, the top link (13) is formed by a hydraulic expansion / contraction cylinder (87) and a piston rod (88) so that the top link (13) can extend and retract, and the top link is moved in and out. (13)
The length of the lower link (12) is changed to the working machine (1
4) The working machine (14) is rotated around the link pin (89) connected to the support plate (23) to change the support height of the rotary pawl (29), and the lift arm (71) is provided with a pressure spring. By connecting the hydraulic pressurizing cylinder (91) via (90), the pressurizing cylinder (91) contraction operation increases the force of the pressurizing spring (90), and the lifting valve (68) is switched to the lower side. , Work machine (1
4) is configured to be lowered by its own weight lowering force and the pressure spring (90) force.

Further, a limit switch type ascending operation sensor (92) and a descending operation sensor (93) for detecting the operation of the position control lever (16) for elevating and lowering the working machine (14), and the lift arm (71). Potentiometer-type rotary position sensor (94) that detects the height of the rotary claw (29) from the ground by the lifting operation of the working machine (14), and the number of revolutions of the engine (2) when changing the direction of the tractor (1) in the field headland. And a solenoid for actuating a pressure valve (96) of a pressure cylinder (91) for increasing and decreasing the force of the pressure spring (90). (97) and a release solenoid (98), and the top link (1
The expansion solenoid (100) and the reduction solenoid (101) for operating the expansion / contraction valve (99) of the expansion / contraction cylinder (87) for expanding / contracting 3) are connected to the tilling controller (6).
9).

Thus, the work machine (1) is attached to the tractor (1).
4) is an electronic governor (63) that is an output adjusting member that controls the rotation of the engine (2) while allowing the vertical movement of the engine (2).
A tilling controller (69) for automatically controlling the rotation of the engine (2) of the electronic governor (63) that accelerates the work implement (14) when it descends to the soil plunge support height. The engine (2) is automatically accelerated immediately before the start of tillage, and the working machine (1
4) is provided with a pressurizing cylinder (91) which is a pressurizing member for forcibly lowering the work implement (14) when the work implement (14) descends to the soil plunge height and the engine (2) accelerates. 14) The pressing cylinder (91) that presses the soil surface against the soil is automatically performed, and the working machine (14) is also installed together with the lower link (12).
The top link (13) that supports the up and down freely is formed by the telescopic cylinder (87) that is the telescopic member to be telescopic.
When the working machine (14) descends to the ground plunge height and the engine (2) speeds up, the telescopic cylinder (87) for pressing the working machine (14) against the soil surface is automatically operated. I am configuring.

Then, as shown in the flow chart of FIG. 22, when the plowing work operation of the working machine (14) is detected by the work sensor (62), the position control lever (16) or the elevating switch (17) is operated. When the operation of raising the work implement (14) is detected, the rotary position sensor (94) input detects the ground escape of the rotary pawl (29), and when the rotary pawl (29) escapes to the ground, The electronic governor (63) is caused to perform the operation of lowering the engine (2) rotation speed to the set value of the conversion rotation speed setting device (95), and the engine (2) is operated at the low rotation speed of the above-mentioned set value that matches the field conditions. , When the lowering operation of the working machine (14) is detected while changing the direction in the field headland, the rotary position sensor (94) inputs the rotary claw (29) to the ground. Detects the input, the rotary claw (2
When 9) descends to the position just before entering the ground, the electronic governor (63) causes the adjustment value of the accelerator lever (102) shown in FIG. 2 to increase the rotation speed of the engine (2). After the direction is changed, the engine (2) is accelerated and the rotary pawl (29) is rushed into the soil again. Further, the pressing force increasing operation for increasing the force of the pressing spring (90) by the pressing cylinder (91) and the expanding operation of the top link (13) of the expanding and contracting cylinder (87) are performed by the rotary claw (29) in the soil. This is automatically performed after the speed-up operation at the time of re-entry, and the rotary claw (29) is rushed to the predetermined tillage depth position detected by the rear cover sensor (70), and the rotary claw (29) reaches the predetermined tillage depth position. After a lapse of a predetermined time required to operate the pressure spring (9
0) The pressing force lowering operation of the pressurizing cylinder (91) for reducing the force and the top link (13) of the telescopic cylinder (87).
The reduction operation is performed while keeping the working depth of the rotary claw (29) substantially constant.

[0029]

As is apparent from the above embodiments, according to the present invention, the work machine (14) is mounted on the tractor (1) so as to be movable up and down, and the output adjusting member (63) for controlling the rotation of the engine (2). ), The controller (69) for automatically controlling the rotation of the engine (2) of the output adjusting member (63) that accelerates the work implement (14) when it descends to the in-ground support height. ) Is provided,
Since the engine (2) is automatically speeded up immediately before the start of tillage, it is possible to easily prevent the speed-up operation from being delayed after the direction is changed in the field headland, and the problem that the tilling depth becomes unstable due to insufficient tillage force. It is possible to easily eliminate the problem that the headland width becomes large due to the occurrence of residual tillage, etc., and it is possible to easily form the headland width to be small and uniform and to simplify the cultivation work of the field headland. is there.

Further, a pressure member (91) for forcibly lowering the working machine (14) is provided, and when the working machine (14) descends to the plunge height in the soil and the engine (2) accelerates. The pressure member (91) that presses the working machine (14) against the soil surface is automatically operated, and the traveling distance until the working depth is stabilized when the working machine (14) is lowered and the tilling work is started. In addition, it is possible to reduce the height of the soil at the beginning of plowing that scatters the cultivated soil on the upper surface of the rear uncultivated land, and to prevent the dashing in which the plowing force acts as the forward traveling force of the tractor (1). .

Further, the top link (13) for supporting the working machine (14) together with the lower link (12) so as to be able to move up and down is formed by the expanding and contracting member (87) so as to be expandable and contractible.
The elastic member (8) that presses the work implement (14) against the soil surface when the engine (2) is accelerated by lowering the height of the engine (2) to the earth plunge height.
7) This is an automatic operation that can lower the working machine (14) and reduce the distance traveled until the tilling depth stabilizes when cultivating work is started, and the cultivated soil is scattered on the upper surface of the rear uncultivated land. It is possible to reduce the rise of soil at the beginning and to prevent the dashing in which the plowing force acts as the forward traveling force of the tractor (1).

[Brief description of the drawings]

FIG. 1 is a tilling control circuit diagram.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of the tillage rotary working machine.

FIG. 5 is a side view of a rotary pawl portion.

FIG. 6 is a plan view of a rear cover.

FIG. 7 is a rear view of the rotary claw portion.

FIG. 8 is a side view of a rear cover sensor section.

FIG. 9 is a side view of a lift arm unit.

FIG. 10 is a plan view of the same.

FIG. 11 is a plan view of a steering sensor unit.

FIG. 12 is a side view of the same.

FIG. 13 is an enlarged view of the same.

FIG. 14 is a side view of a brake sensor unit.

FIG. 15 is a hydraulic circuit diagram for raising and lowering a working machine.

FIG. 16 is a traveling speed control flowchart.

FIG. 17 is the same flowchart.

FIG. 18 is a flowchart of the same.

FIG. 19 is the same flowchart.

FIG. 20 is the same flowchart.

FIG. 21 is the same flowchart.

FIG. 22 is a flowchart for controlling the start of plowing work.

[Explanation of symbols]

 (1) Tractor (2) Engine (12) Lower link (13) Top link (14) Tillage rotary working machine (63) Electronic governor (output adjustment member) (69) Tillage controller (87) Telescopic cylinder (telescopic member) (91) ) Pressurizing cylinder (pressurizing member)

Front page continuation (72) Inventor Tetsuya Takizawa 1-1-1 Ishishiba, Matsumoto City, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory

Claims (3)

[Claims] 1. A cultivating device, in which a working machine is mounted on a tractor so as to be able to move up and down, and an output adjusting member for controlling the rotation of an engine is provided, wherein the speed is increased when the working machine descends to a ground plunge support height. A cultivating device comprising a controller for automatically controlling engine rotation of an output adjusting member. 2. An operation of a pressing member for pressing a working machine against a soil surface when a pressing member for forcibly lowering the working machine is provided and the working machine descends to a plunge height into the soil to accelerate the engine. 2. The tilling device according to claim 1, wherein the cultivating device is automatically operated. 3. A top link for supporting the working machine together with the lower link so as to be able to move up and down is formed by a telescopic member so as to be able to expand and contract, and when the working machine descends to the earth plunge height and the engine speeds up, the working machine is soiled. The cultivating device according to claim 1, wherein the operation of the elastic member pressed against the surface is automatically performed.