JPH09201107A - Tilling rotary working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a tilling rotary working machine performing a rotational work giving excellent tilling accuracy of a tilling work. SOLUTION: This tilling rotary working machine has a raising and lowering means 50 performing raising and lowering of a tilling rotary working machine equipped in a running vehicle and a cover transfer-controlling means 52 longitudinal transferring a tilling rotary cover. The front and rear transfer of the position of the rotary cover is controlled when linking with the raising and lowering operation of the rotary working machine by the raising and lowering means 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling rotary working machine equipped with a tilling rotary working machine at a rear portion of a traveling vehicle to perform a tilling work or the like.

[0002]

In this seed tilling rotary working machine, when the rotary cover is fixedly mounted,
When turning the machine by lifting the work implement, the gap between the lowermost end of the rotary cover and the ground also expands, and when dirt or stones are scattered behind by the rotation of the rotary, such as immediately after the start of turning, the outside of the gap is covered. Soil and stones will pop out. Further, as a conventional technique, as shown in Japanese Patent Publication No. 7-67409, there is a combination of plowing depth control and forward and backward movement of a tilling rotary cover, but this problem is not solved.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention comprises an elevating and lowering operation means for elevating and lowering a tilling rotary working machine mounted on a traveling vehicle, and a cover movement control means for moving a tilling rotary cover back and forth. A state in which the rotary cover position is moved back and forth in conjunction with the raising / lowering operation of the rotary working machine by the operating means, and the rotary cover is moved rearward (downward) when the rotary working machine is raised by operating means such as a lifting switch. Control to reduce the gap between the bottom edge of the cover and the ground, preventing dirt and stones from flying from the rotary to the outside of the cover and allowing good turning work. The movement of the soil at the end of plowing (start of turning) is suppressed to a small level, and the rise of soil due to the rotary at the beginning of plowing (end of turning) is also reduced by the cover. Won improves tillage accuracy, but to particular further improve the workability and tillage accuracy scattering of dirt and sand larger the PTO rotational speed increases less effectively suppressed.

Further, an elevator operating means for raising and lowering a rotary working machine mounted on the traveling vehicle and an engine output control means for controlling the output of the engine are provided, and the engine is rotated in association with the raising operation of the working machine by the raising and lowering operating means. The number of rotations is reduced to a low rotation set value, and the rotary cover position is controlled to move back and forth in conjunction with the raising / lowering operation of the rotary working machine by the raising / lowering operation means, so that the rotary working machine is operated by the raising / lowering operation means at the time of turning the machine body. When raising it, the engine speed is automatically reduced to make a safe turn at low speed, and the rotary cover is controlled to move backward (downward) to prevent dirt, stones, etc. from popping out from the cover. so,
This enables good turning work.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a control circuit diagram, FIG. 2 is a side view of the whole, and FIG. 3 is a plan view of the same. In the figure, (1) is a tractor that is a traveling vehicle having front and rear wheels (2) and (3), and a driving cabin ( 4) A steering wheel (6) is provided in front of the driver's seat (5), and the steering wheel (6) is configured to turn the front wheels (2) to steer the vehicle body.

As shown in FIG. 4, a side drive type tilling rotary working machine (8) is mounted on a tractor (1) via a three-point link mechanism (7) so as to be able to move up and down. 9) is arranged, and the input shaft (10) is connected to the PTO shaft of the tractor (1) via the drive shaft with a universal joint to input the plowing drive force to the gear box (9).

Further, a beam (11) as a main frame is projected to both sides from the side surface of the gear box (9),
A support plate (12) is fixedly installed in the middle of each of the beams (11), and a pin (14) that pivotally connects the lower link (13) of the three-point link mechanism (7) to the front end of the support plate (12). ) Is projected, and the depth frame (1
The front end of 5) is pivotally supported, and the rear end of the top link (17) of the three-point link mechanism (7) is connected to the front end of the mast (16) above the gear box (9).

Further, an upper part of the chain case (18) is fixedly provided at the left outer end of the beam (11), and a tillage claw shaft (19) is horizontally installed at a lower part of the chain case (18) to provide the tillage claw shaft ( 19) A large number of plowing nails (20) consisting of nata nails are radially planted in a side view, and the plowing nails (20) are also provided.
The upper part of the rotation locus is covered by a rotary cover (21), and both sides are covered by side covers (22).
The plowing shaft (19) is a gear in the gear box (9), a transmission shaft in the beam (11), a chain case (1).
8) Driven through the sprocket and the chain in the inside, the plowing is performed by rotating the plowing claws (20).

Further, a first plate (23) is fixedly provided at the front of the left and right ends of the beam (11), and a bolt (24) and a second plate (2) are provided at the front end of the plate (23).
5) through which a pipe-made supporting rod (25) is horizontally mounted, and a pivot shaft (27) is rotatably inserted into the pipe-made supporting rod (26) to form a double shaft structure. The spring steel cutting blade (30) is detachably fixed to the fixed mounting plates (28) sandwiching the second plate (25) of the rotating shaft (27) through the bolts (29). Cutting blade (3
The tip edge part of 0) is made to plunge into the soil. An electric lift cylinder (electric motor) (31) for raising and lowering the cutting blade is provided between the second plate (25) and the fixed mounting plate (28), and a fixed bracket for the second plate (25). The electric cylinder (3) is connected to the (32) via the pivot (33).
1) is supported and the tip of the rod (34) of the electric cylinder (31) is fixed to the fixed mounting plate (2) via the pivot (35).
8), and the swinging movement of the lifting cylinder (31) causes the cutting blade (30) to swing up and down about the rotary shaft (27) to appropriately change the plunging depth of the cutting blade (30). It is configured to let.

The cutting blade (30) has a substantially straight portion (3) on the upper side.
0a), the lower side is formed into a curved portion (30b), and the front portion is tilted in a high-rear-low manner so that the curved portion (30b) is seen in a side view in the front portion of the rotation locus (A) of the tiller claw (20). The plowing claws (20) are made to overlap so that the plunging claws (20) are substantially aligned with the soil plunging points of the cutting blade (30).
The soil is cut by the cutting blade (30) at the time of cutting the soil, and the cut soil is easily cultivated by the plowing claw (20) to reduce the load in this plowing work. ing. Further, the cutting blade (30) is
Under hard soil conditions where the rotary tiller (36) rises to a dash state, the inrush length of the cutting blade (30) is adjusted to a large extent to prevent the rotary (36) from rising, while When the tilling load changes and the engine load also increases due to changes in the tractor posture and the tractor posture, the rush length is adjusted to a small value to maintain the engine load stable.

Furthermore, in order to invert the soil after cutting the plowing claw (20), the tip is alternately bent to the right or left by a certain width (approximately 80 mm) to have elasticity, and has an elasticity at 180 ° facing position. Four holders (37) attached to the same cross section of the claw shaft (19) so that the bending direction of the tilling claw (20) is the same in the right or left direction (four per claw shaft (19) rotation) The number of plowing nails (2) is attached in the same direction (2). The turning radius (a) of the tilling claw (20) is set to approximately 245 mm, and the base interval (T) of the adjacent tilling claws (20) (20) in the facing relationship is set to a large gap of 5, while the tip end is The interval (t), which is the gap between the claw loci (L), is approximately 1 (T: t≈5: 1) (T≈200
mm, t≈40 mm), and the base interval (T)
By increasing the number of plowing claws (20) and reducing the number of attachments, the required power is reduced, and the surplus capacity at the time of plowing with the same power is turned to speed to achieve high-speed (about twice the conventional) tillage. It is configured to be possible.

As shown in FIGS. 1 and 6, the engine (38)
Of the electronic governor (40) that detects the fuel injection amount from the rack position. The fuel injection pump (39) includes a fuel injection solenoid (41) that is a rack solenoid that adjusts the fuel injection amount by the electronic governor (40). A rack position sensor (42), a pickup type rotation sensor (43) for detecting the number of revolutions of the engine (38), and a potentiometer type for detecting an operation amount of an accelerator lever (44) or a pedal (45) operated by an operator. An accelerator sensor (46) is provided, and these solenoids (41), sensors (42), (43) and (46) are provided to a governor controller (47) of an electronic governor (40) that is engine output control means.
To the engine speed set by the accelerator lever (43) or the pedal (44).
In (0), the fuel injection amount is adjusted so that the vehicle travels while maintaining the set engine speed.

A load factor setting device (48) for setting a reference value of a load factor (rack position change rate) of the engine (38) obtained from the electronic governor controller (47) and a working machine (8) are moved up and down. An electromagnetic lifting valve (49) of a hydraulic lifting cylinder, a one-touch operation lifting switch (50) which is a lifting operation means for lifting the working machine (8),
One-touch on / off switch (51) that turns on / off (on / off) the one-touch lifting by this switch (50)
And a rotary motor (a rotary cylinder) (52) which is a rotary cover movement control means for rotating the rotary cover (21) in the front-rear direction about the tillage claw shaft (19), and an electronic governor controller ( To the tiller controller (53) to be connected to 47), the setting device (48), the valve (49), each switch (50) (51), and the motor (52) are connected, and the electronic governor controller (4) is connected.
7) The lift valve (49) is automatically controlled based on the change of the load factor of the engine (38) to change the support height of the working machine (8) with respect to the tractor (1) to change the tilling depth. The engine (38) is configured to perform work in a state where the load factor of the engine (38) is maintained substantially constant.
The rotary cover (52) is rotated in the front-rear direction in conjunction with the raising / lowering operation of the raising / lowering switch (50), and the rear cover (54) connected to the rear of the cover is vertically moved. ing.

This embodiment is constructed as described above, and conventionally, for example, the number of claws per one rotation of the claw shaft (19) is 1, the claw shaft rotation speed is approximately 170 rpm, and the vehicle speed is 0.5 m / s. The plowing work carried out under the condition that the number of claws per revolution of the claw shaft (19) is 2 and the claw shaft rotation speed is approximately 170 rpm and the vehicle speed is 1 to 1.5 m / s. The work efficiency is greatly improved by increasing the speed to about twice or more.

During work, the engine (3
8) Based on the change in the load, the work machine (8) is moved up and down to control the load of the engine (38) constantly, while the lifting switch (50) raises and lowers the work machine (8). At times, engine output control for changing the rotational speed and output torque characteristics of the engine (38) is performed. The flow chart of FIG. 9, the routine of FIG.
This operation will be described with reference to the torque characteristic diagrams of FIGS.

The rotation of the normal engine (38) is determined by the engine speed (N) detected by the accelerator sensor (46).
2) is controlled by the electronic governor (40) so that the actual engine speed (N1) detected by the rotation sensor (43) is made equal (N2 = N1). During control, when the one-touch on / off switch (51) is turned on and the lifting switch (50) is raised,
Rotate the engine (38) to 1500 rpm as shown in
Is reduced to the set value and
The engine output is switched to a low rotation torque characteristic that makes the maximum torque at 00 rpm, the traveling speed is automatically reduced during turning work, etc., and good work with the torque required for turning secured is made possible. Is.

After the turning, the up / down switch (50)
When lowering the engine, the engine (3
The engine speed of 8) is increased up to the engine speed of 2500 rpm set by the accelerator and the
By switching the engine output to a normal work torque characteristic that makes the maximum torque at pm, at a predetermined traveling speed necessary for work,
The maximum torque at this speed is secured to enable efficient high-speed cultivating work.

Further, when the engine speed is increased / decreased and the engine torque characteristic is switched by the elevating switch (50), the rotary cover (21) also moves and changes at the same time. As shown in FIG. (5
When the working machine (8) is lowered to the normal working position by the lowering operation of 0), the rotation motor (52) causes the piston rod (52a) to contract to the shortest, and the tiller claw shaft (19).
By rotating the rotary cover (21) forward around the center of the rear cover (54) and moving the rear cover (54) upward, the cultivating surface is leveled at the lowermost end of the rear cover (54).
The work machine (8) is operated by raising the lifting switch (50).
Rotating motor (52) when raising and raising the swivel work
Extends the piston rod (52a) to the maximum length, and rotates the rotary cover (21) rearward around the tillage claw shaft (19) to move the rear cover (54) downward, and the rear cover (54) is moved. The gap (C) formed between the lowermost end of the roller and the ground is reduced so that when the rotary (36) rotates to scatter the soil and stones backward, the cover (C) from the gap (C) 54) This makes it possible to perform a good turning operation in which the outward protrusion is suppressed to the maximum. In this way, the rotary cover (21) is used during turning work.
As a result of rotating the tiller backward, it is possible to minimize movement such as scattering of the soil to the outside of the cover (21) at the end of the plowing (start of turning), and the rise of the soil at the beginning of plowing (the end of turning) can also be made small, so that the plowing can be done. The accuracy can be improved, and in particular, the higher the PTO rotation speed, the less the scattering of soil and sand and the like, and the more effectively suppressed, which enables safe and good work.

[0019]

As is apparent from the above-described embodiments, the present invention provides a tillage rotary working machine (8) equipped on a traveling vehicle (1).
Elevating operation means (50) for moving up and down, and cover movement control means (52) for moving the tilling rotary cover (21) back and forth, and raising and lowering the rotary working machine (8) by the lifting operation means (50). Since the rotary cover (21) position is controlled to move back and forth in conjunction with the operation,
When the rotary working machine (8) is lifted by the operating means (50) such as an elevating switch, the rotary cover (21) is controlled so as to be moved in the rear (down) direction so that the lower end of the rear cover (54) and the ground surface are Gap formed between (C)
It is possible to effectively prevent the soil and stones from scattering from the rotary to the cover (54) side even when they are scattered to the cover (54) side, thereby enabling good turning work. The movement of the soil at the end (start of turning) can be suppressed to a small level, and the rise of soil due to the rotary at the start of tilling (the end of turning) can be suppressed to a small level by the cover (54), and the tilling accuracy can be improved. Especially P
As the TO rotation speed increases, the scattering of soil and sand can be effectively suppressed and the workability and the tilling accuracy can be further improved.

Further, it is provided with an elevating and lowering operation means (50) for elevating and lowering the rotary working machine (8) mounted on the traveling vehicle (1) and an engine output control means (47) for controlling the output of the engine (38). The engine speed is reduced to a low rotation set value in conjunction with the lifting operation of the work implement (8) by the lifting operation means (50), and the lifting operation means (50) is also provided.
Since the position of the rotary cover (21) is controlled to move back and forth in conjunction with the raising and lowering operation of the rotary working machine (8) by means of, the raising and lowering operation means (50) is used when the machine is turning.
When raising the rotary working machine (8) by
The engine speed can be automatically reduced to make a safe turn at low speed, and the rotary cover (21) can be moved backward (downward) to prevent dirt, stones, etc. from popping out from the cover (21). It is possible to prevent the above-mentioned problem and to perform a good turning work.

[Brief description of drawings]

FIG. 1 is a control circuit diagram.

FIG. 2 is an overall side view.

FIG. 3 is an overall plan view.

FIG. 4 is a side view illustrating a rotary portion.

FIG. 5 is an explanatory plan view of a rotary portion.

FIG. 6 is a layout explanatory diagram of a control unit.

FIG. 7 is a side view of a rotary cover portion.

FIG. 8 is a side view illustrating a rotary cover portion.

FIG. 9 is a flowchart.

FIG. 10 is an explanatory diagram showing a rotary routine of a rotary cover that is linked to a lifting switch.

FIG. 11 is an explanatory diagram showing normal working torque characteristics of engine output.

FIG. 12 is an explanatory diagram showing low rotation torque characteristics of engine output.

[Explanation of symbols]

 (1) Tractor (traveling vehicle) (8) Working machine (21) Rotary cover (38) Engine (47) Controller (output control means) (50) Elevating switch (elevating operation means) (52) Rotating motor (cover movement) Control means)

Claims (2)

[Claims] 1. A lifting / lowering operation of a rotary working machine equipped with a lifting / lowering operation means for lifting / lowering a tilling rotary working machine mounted on a traveling vehicle and a cover movement control means for moving a tilling rotary cover back and forth. A tilling rotary working machine characterized in that the rotary cover position is controlled to move back and forth in conjunction with. 2. An engine rotation control means for raising and lowering a rotary working machine mounted on a traveling vehicle, and an engine output control means for controlling engine output control. The rotary tillage working machine is characterized in that the number of rotations is reduced to a low rotation set value, and the rotary cover position is controlled to move back and forth in conjunction with the lifting operation of the rotary working machine by the lifting operation means.