JPH08228503A - Tillage rotary work machine - Google Patents

Abstract

PURPOSE: To provide a rotary tiller enabling easy tilling work at a high running speed, capable of safely protecting a cutting blade and having excellent working performance and durability by providing a supporting rod for holding plural cutting blades and detachably attaching the supporting rod to a bracket fixed to a main frame. CONSTITUTION: This rotary tiller is provided with a tilling rotary attached to a running vehicle, cutting blades 34 to be thrust into the soil and placed in front of the rotary, a supporting rod 25 holding plural cutting blades 34 and detachably attached and fixed to a bracket 23 fixed to a main frame 11 and an elastic member 28 inserted between the cutting blade 34 and the supporting rod 25. Preferably, the cutting blades 34 are rotatably attached to a pivoting shaft 31 connected to the main frame 11 and the blades are made to be switchable between an action position to be thrust into the soil and a non-action position lifted above the ground.

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 in which the traveling speed of a traveling vehicle during tilling work is increased to shorten the tilling work time by the tilling rotary.

[0002]

2. Description of the Related Art In such a tilling operation, when only the traveling speed is high, the tilling pitch becomes large and the remaining tillage also increases. Therefore, there is a means for increasing the rotation speed of the tilling rotary according to the traveling speed. However, in this case, there was a drawback that the plowing load was increased to increase the required power. Therefore, while keeping the number of rotations of the tilling rotary at a constant number of rotations, the number of claws per one rotation of the claw shaft is increased according to the traveling speed to reduce the residual plowing and to attach the tilling claws in the plowing width direction. There has been a means to reduce the number of cultivated fields to prevent an increase in the tilling load and maintain a stable traveling speed.

However, even in this case, when the traveling speed is set to a high speed while the rotation speed of the tilling rotary is kept constant, the pulling resistance of the tilling rotary is increased to reach the tilling rotary. Since there is a problem such as causing a slip phenomenon and making the plowing rotary side float to lower the plowing depth, a cutting blade for plunging the cutting edge into the soil is provided in front of the plowing rotary to allow slipping on the plowing rotary. There are means to prevent the phenomenon.

[0004]

[Problems to be Solved by the Invention] However, in this case,
Under the working conditions of hard soil and hard soil, appropriate work is performed, but under the working conditions of soft soil and soft soil, a subsidence phenomenon occurs in which the plowing rotary lowers the plowing rotary by the cutting blade beyond the proper plowing depth. There was a problem of making it live.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a support for mounting a plurality of cutting blades in a tilling rotary working machine in which a cutting blade for plunging a blade tip into the soil is provided in front of a tilling rotary equipped on a traveling vehicle. A rod is provided, and the support rod is detachably attached and fixed to the bracket that is fixed to the main frame so that it can be easily removed as a set without individually attaching and removing multiple cutting blades to various rotary working machines. , It is possible to easily perform heavy load work such as hard soil with a cutting blade attached, or light load work such as soft soil with a cutting blade detached, and work properly adapted to the field conditions, and cultivate It is also possible to easily adjust the mounting position of the cutting blade with respect to the tilling claw of the rotary between the bracket and the supporting rod.

Further, an elastic body is provided between each cutting blade and the supporting rod so that the cutting blade can be swung back and forth by the elastic body when the cutting resistance applied to the cutting blade during plowing work changes. The rocking impact force and the repulsive force are applied to the soil to improve the crushing effect of the soil, and the safety of the cutting blade itself is also improved to improve the durability.

Furthermore, in a cultivating rotary working machine in which a cutting blade for plunging the cutting edge into the soil is provided in front of a cultivating rotary equipped on a traveling vehicle, the cutting blade is rotatably attached to a pivot shaft connected to and supported by a main frame. Mounting, providing a cutting blade that can be switched to a working position of plunging into the soil and a non-working position above the soil surface, without the trouble of attaching and detaching the cutting blade each time,
Under hard soil conditions where the rotary tillage floats and becomes a dash state, the cutting blade is switched to the plunge position in the soil to prevent the rotary from floating, while the cutting blade remains submerged more than appropriate. Under such soft soil condition, the non-acting position above the soil surface is switched to easily enable high-speed traveling tilling work properly corresponding to any hard or soft soil condition.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view of a mounting portion of a cutting blade, FIG. 2 is a side view of the whole, and FIG. 3 is a plan view thereof. (1) is a tractor which is a traveling vehicle having front and rear wheels (2) and (3). A steering handle (6) is provided in front of the driver's seat (5) in the driving cabin (4), and the steering wheel (6) is operated to turn the front wheels (2) to steer the vehicle body. are doing.

As shown in FIGS. 4 to 5, a side drive type tilling rotary working machine (8) is mounted on a tractor (1) via a three-point link mechanism (7) so that it can be moved up and down. The gearbox (9) is arranged, and the input shaft (10) is connected to the PTO shaft of the tractor (1) through the drive shaft with the universal joint to input the plowing drive force to the gearbox (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 form 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).

Also, as shown in FIGS. 6 to 8, a first plate (23), which is a bracket, is fixedly provided in front of the left and right ends of the beam (11), and a bolt (24a) and a bolt (24a) are provided at the front end of the plate (23). The support rod (25) is laid horizontally through the second plate (24), and the bolts (27) are attached to the fixed mounting plates (26) on both sides of the second plate (24) of the support rod (25). One end of the elastic blade receiver (28), which is an elastic body formed in a U-shape with spring steel, is detachably fixed, and the other end of the blade receiver (28) is bolted (29) to a circle. The plate-shaped blade receiving plate (30) is detachably fixed. Then, the shaft boss portion (32a) of the blade mounting plate (32) is rotatably fitted to the oblique pivot shaft (31) protruding downward at the center of the blade receiving plate (30), and the boss portion (32
a) The disc portion (32b) on one end side is brought into sliding contact with the blade receiver (30), and the standing plate portion (32 on the side opposite to the sliding contact surface of the disc portion (32b) is provided.
The cutting blade (34) made of spring steel through the bolt (33) in c)
The upper end is detachably fixed to the shaft (31) at an eccentric position, and the tip edge part (34a) of the cutting blade (34) is appropriately thrust into the soil.

As shown in FIG. 9, the blade mounting plate (32)
Has a pin boss (32d) parallel to the shaft boss (32a).
Is provided, the lock pin (36) is inserted into the pin hole (35) of the boss portion (32d), and the interchangeable long hole (37) for engaging the tip of the lock pin (36) with the blade receiving plate (30). ) Is formed, a position regulating collar (39) is attached to the tip end side of the lock pin (36) via a retaining ring (38), and the head (36a) of the lock pin (36) and the boss portion (32) are formed.
d) A compression spring (40) is provided between the end faces so that the collar (39) is normally pressed by the spring (40) force toward the blade receiving plate (30). Then, at both ends of the elongated hole (37), which are spaced approximately 90 degrees from each other about the pivot shaft (31),
A blade mounting plate (32) is formed when the collar (39) is fitted into the tapered hole (37a) by forming a tapered hole (37a) for locking the action and non-acting position for fitting with the lower surface of the collar (39).
The position of the cutting blade (34) is controlled to hold the cutting blade (34) at the working position of the soil plunge or the non-working position above the soil surface, and the collar (39) is provided with the blade receiving plate () against the spring (40). Three
It is configured such that these can be freely switched along the elongated hole (37) when being lifted above 0). In addition, a constant gap (C) is formed between the head of the bolt (29) fixing the blade receiver (28) and the blade mounting plate (32) and the support rod (25), and the cutting blade (34). When the load is overloaded, the support rod (25) is brought into contact with the head of the bolt (29) to serve as this stopper.

As shown in FIG. 1, the cutting blade (34) has an upper portion (34b) formed in a straight shape, and a mounting hole for the bolt (33) is formed on a side surface of the cutting blade (34).
3) The intermediate part (34c) of 3) is curved rearward so that the intermediate part (34c) faces the front part of the rotation locus (A) of the plowing claw (20) and is slightly inclined forward toward the lower tip side. It is provided to let you. That is, the intermediate portion (34c) of the cutting blade (34) is arranged so as to overlap with the front portion of the rotation locus (A) in a side view, and the cutting blade (3) is
4) The lower end is arranged slightly outside the lower end on the front outer side of the rotation locus (A) of the tilling claw (20).

Further, in plan view, the cutting blade (34) is arranged between the tilling claw (20) and the tilling claw (20), and when the tilling claw shaft (19) is rotated, the cutting blade (34) becomes Arrange the plowing claws (20) so that they do not interfere with each other, and the cutting blade (34)
The space between the cultivating claws (20) is narrowed to prevent residual cultivation. However, the tiller (20) and the tiller (20)
It is not necessary to provide the cutting blades (34) between all of them, and as described above, they are appropriately spaced so that excessive plowing resistance does not occur (a total of four on the left and right sides).

A partition plate (41) is arranged between the rear portion of the cutting blade (34) and the rotary cover (21), and the partition plate (41) is fixed to the inner peripheral surface of the front end of the rotary cover (21). The partition plate (41) is formed in a substantially triangular shape, and the upper side (41a) is a rotary cover (21).
The front side (41b) is substantially vertical and the rear side (41c) is arcuate so as to guide the straw or the like downward along the shape of the inner side surface. The upper end of the partition plate (41) is made higher than the upper end of the rotation track A of the tilling claw (20), and the width (plate thickness) (H) of the partition plate (41) is the cutting blade (34).
The width (h) of the blade is slightly smaller (H <h) so that straws or weeds are not entangled with the cutting blade (34).

Further, the inner two of the four cutting blades (34) are disposed on the wheel width extension lines of the left and right rear wheels (3) of the tractor (1) so that the left and right rear wheels (3) pass through. The cutting wheel (34) is moved along the trace so that the rear wheel (3)
By setting the wheel traces of the field scene that has been crushed by the two cutting blades (34) so as to be broken down, a substantially uniform tilling work is performed over the entire tillage width similar to the field scene except the wheel traces. It is configured to close.

Further, each cutting blade (34) is arranged outside the width between the links (13) of the left and right lower links (13), and when the rotary working machine (8) is tilted in the left-right direction, It is configured to prevent the occurrence of rolling by suppressing the lateral inclination to the minimum by the rush resistance of the cutting blade (34) to be rushed into the inside.

By the way, as shown in FIG. 10, in the embodiment, the tip of the tilling claw (20) is alternately cut to the right or left in order to invert the soil after cutting it, so that the tip has a constant width (approximately 80).
mm) curved so as to have elasticity, and attached to the same cross section of the claw shaft (19) so that the bending direction of the tilling claw (20) at the 180 ° opposite position is the same in the right or left direction. The holder (42) is equipped with four tilling claws (20) (two in the same direction as the number of claws per rotation of the claw shaft (19)). Then, the turning radius (a) of the tilling claws (20) is set to about 245 mm, and the adjacent tilling claws (2) in the facing relationship are
0) (20) has a large base clearance (T) of 5, whereas the clearance (t) which is the clearance of the tip claw locus (L) is approximately 1 (T: t≈5: 1) (T ≈ 200 mm, t ≈ 40 m
m) to increase the base interval (T) and reduce the number of tillage claws (20) to be attached, thereby reducing the required power and speeding up the remaining tillage power with the same power. It is configured so that it can be turned at high speed for high-speed cultivation.

That is, the plowing claw (20) has a large curving width (b) (b≈80 mm) with a large curving width (b) (b = 80 mm) by curving the soil and then scooping the soil to scoop the soil. 20a) is formed into an easily deformable elastic claw, and when the plowing claw (20) is driven into the soil, the horizontal component force of the bending portion (20a) pushes the soil in the curved lateral direction, and the plowing claw ( 20) by the lateral repulsive force when elastically deforming the soil in the anti-curvature direction due to the resistance load of the soil, the scooping soil is extruded in the lateral direction substantially parallel to the tiller shaft (19) shown in the arrow of FIG. Thus, the soil portion remaining as residual tillage is crushed between the tip loci (L) of the left and right tillage claws (20) facing each other, and the residual tillage is effectively prevented from being formed. .

In this case, the nail (2
0) rotates and the resistance load of the soil becomes small, the soil part left as residual tillage is crushed from the lateral direction by the restoring elastic force due to the elastic deformation at the time of driving the nail (20) against the soil, and the crushing effect is further enhanced. To improve. The number of claws can be reduced as a claw structure that minimizes the remaining plow while cultivating with the remaining plow remaining. Further, even if there is a passage traced by the rear wheel (3) which is hard to be crushed as described above, this interval (t) is formed by cutting the cutting blade (34) before plowing with the claw (20). It is possible to further improve the tilling performance by performing the reliable crushing of the remaining plowed portion in).

This embodiment is constructed as described above. Conventionally, for example, the number of claws per revolution of the claw shaft (19) is one, the claw shaft rotation speed is about 170 rpm, and the vehicle speed is 0.5 m / s. With the number of claws per rotation of the claw shaft (19) being two, the number of claw shaft rotations is approximately 170 rpm and the vehicle speed is 1
It is carried out under working conditions of up to 1.5 m / s, and the working speed is substantially doubled or more than that of the conventional one, and work efficiency is greatly improved.

When the traveling speed is increased as described above, the higher the traveling speed is, the more the drag resistance of the rotary working machine (8) is increased to cause the upslip phenomenon in the tillage rotary. Although the working machine (8) is to be lifted, the cutting blade (34) having a receding angle (α) that plunges into the soil moves downward and the cutting blade (34) moves. The force of pressing the side surface with soil serves as pull-out resistance of the cutting blade (34) to prevent the working machine (8) from rising.

Further, the cutting blade (34) is overlapped with the soil plunging point of the tilling claw (20) so as to substantially coincide with the soil plunging point in a side view, and the cutting blade is used when cutting the soil of the plowing nail (20). The soil can be cut by (34), and the cut soil can be easily cultivated by the tilling claw (20) to reduce the load in this tilling work.

When the cutting blade (34) receives the resistance of the soil during the work, the blade receiving body (28) made of a spring causes the cutting blade (3) to move.
In 4), the rocking effect of the soil can be improved by rocking back and forth so that the rocking force and the repulsive force act on the soil. Further, a constant gap (C) is formed between the head of the bolt (29) for fixing the blade receiver (28) and the blade mounting plate (32) and the support rod (25), and the cutting blade ( When the load 34) is overloaded, the support rod (25) can be brought into contact with the head of the bolt (29) to serve as this stopper to improve the safety and the blade receiver (28). Fatigue failure due to repeated rocking can also be prevented by the gap (C).

Furthermore, the first and second plates (2
3) By making the bolt hole of the bolt (24a) connecting the (24) a stupid hole, the front and rear position of the cutting blade (34) with respect to the tilling claw (20) can be adjusted, and the tilling claw (20) can be adjusted. It is possible to constantly adjust and maintain the margin (F) of the cutting blade (34) and the plowing claw (20) by coping with changes such as wear of the blade.

Further, the cutting blade (34) is stored in a non-acting position above the soil surface substantially in parallel with the ground surface without any troublesome work such as removing the cutting blade (34) in each case when the soil is soft and has a light load. It is possible to easily perform work properly corresponding to soil hardness and softness.
The cutting blades (34) adjacent to each other on the left and right sides are attached at positions eccentric to the pivot shaft (31) with the phases vertically different, as shown in FIG.
Even when 4) is stored, it can be stored without any trouble in a state where the positions are vertically shifted without interfering with each other.

11 to 12 show L-shaped blade receivers (28) of U-shape in the above-mentioned embodiment.
The blade receiver (28a) having a shape is used.
A notch (4) to be fitted to the collar (39) on the peripheral side surface of the blade receiver (30) fixed to the a) via the bolt (29).
3) is provided at three positions at intervals of approximately 90 degrees and is configured to switch to the operating and non-operating positions as described above.

[0029]

As is apparent from the above embodiments, the present invention is directed to a tilling rotary working machine in which a cutting blade (34) for thrusting the blade tip into the soil is provided in front of the tilling rotary equipped on the traveling vehicle (1). , A support rod (25) for mounting a plurality of cutting blades (34) is provided, and the support rod (25) is detachably attached and fixed to a bracket (23) fixed to the main frame (11). A plurality of cutting blades (34) can be easily attached / detached to / from the rotary working machine as a set without individually attaching and removing the cutting blades (34), and a heavy load work such as hard soil with the cutting blades (34) attached, or It is possible to easily perform work properly corresponding to field conditions, such as light load work on soft soil after removing the cutting blade (34), and to cut the tilling claw (20) of the rotary tiller. Adjusting the mounting position of the well (34),
It can be easily made between the bracket (23) and the support rod (25).

Further, each cutting blade (34) and the supporting rod (25)
Since the elastic body (28) is interposed between the elastic body (28) and the cutting body, the elastic body (28) swings the cutting blade (34) back and forth when the cutting resistance applied to the cutting blade during cultivating work changes. As a result, rocking impact force or repulsive force can be applied to the soil to improve the crushing effect of the soil, and at the same time, the safety of the cutting blade (34) itself can be improved and the durability can be improved. is there.

Further, in a tilling rotary working machine in which a cutting blade (34) for plunging the blade tip into the soil is provided in front of the tilling rotary mounted on the traveling vehicle (1), a pivot support connected to and supported by the main frame (11). The cutting blade (3
4) is rotatably attached, and the cutting blade (34) is provided so as to be switchable between the working position of the soil plunge and the non-working position above the soil surface. Therefore, the cutting blade (34) is detached each time. The cutting blade (3) can be used under heavy load conditions such as hard soil that causes the rotary tiller to rise to a dash state without any hassle.
4) can be switched to the plunge position in the soil to prevent the floating of the rotary, but under light load conditions such as soft soil that will sink more than appropriate with the cutting blade (34) attached,
By switching to a non-acting position above the soil surface, it is possible to easily enable high-speed cultivating work that properly responds to soil conditions of both light and heavy loads, which is a remarkable effect.

[Brief description of drawings]

FIG. 1 is an explanatory view of a mounting portion of a cutting blade.

FIG. 2 is an overall side view.

FIG. 3 is an overall plan view.

FIG. 4 is a side view of a rotary rotary part.

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

FIG. 6 is a partial explanatory view of a cultivating rotary portion.

FIG. 7 is an explanatory diagram of a blade receiver.

FIG. 8 is an exploded explanatory view of a blade receiving plate and a blade mounting plate.

FIG. 9 is a cross-sectional explanatory view of a lock pin portion.

FIG. 10 is a rear view of the tilling claw portion.

FIG. 11 is an explanatory diagram showing another modified structural example.

FIG. 12 is an explanatory view showing another modified structure example.

[Explanation of symbols]

 (1) Tractor (traveling vehicle) (11) Beam (frame) (23) Plate (bracket) (25) Support rod (28) Blade receiver (elastic body) (31) Pivot shaft (34) Cutting blade

Continued Front Page (72) Minoru Tanabe, No. 32 Chayamachi, Kita-ku, Osaka City Yanmar Diesel Co., Ltd.

Claims (3)

[Claims] 1. A cultivating rotary working machine in which a cutting blade for plunging a cutting edge into the soil is provided in front of a cultivating rotary equipped on a traveling vehicle, and a supporting rod for mounting a plurality of cutting blades is provided and fixed to a main frame. A tillage rotary working machine characterized in that a support rod is detachably attached and fixed to a bracket. 2. The tillage rotary working machine according to claim 1, wherein an elastic body is provided between each cutting blade and the support rod. 3. A tilling rotary working machine in which a cutting blade for plunging a blade tip into the soil is provided in front of a tilling rotary equipped on a traveling vehicle, so that the cutting blade is rotatable about a pivot shaft connected to and supported by a main frame. A tilling rotary working machine characterized by being provided with a cutting blade which can be switched between a working position for mounting and plunging into the soil and a non-working position above the soil surface.