JP2002017103A - Rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the difficulty in crushing the surface clod in the digging of a field at a low rotational speed in the case of finely crushing the surface clod with a rotary tiller while leaving large clods in the inner part to improve the root spread of the growing crop. SOLUTION: Tilling tines 1 are attached in arranged manner to a laterally extending tilling tine shaft 2. The upper part of the shaft is covered with a main cover 3 and the rear part of the shaft 2 is covered with a rear cover 4. In a rotary tilling tool having the above structure, a swinging screen 8 provided with a plurality of longitudinal teeth 6, 6... and lateral teeth 7 protruding backward from the lower end of the longitudinal teeth 6 and swinging in longitudinal direction around the side of the main cover 3 is placed between the tilling tine shaft 2 and the rear cover 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rotary tilling device. The present invention seeks to improve the leveling performance of the rear cover by running while tilling the soil surface, finely crushing the mud excavated and tilled as an earth mass, and crushing the soil.

[0002]

2. Description of the Related Art In a conventional swing screen, a plurality of bar-shaped vertical teeth are provided in a comb-shape, and the vertical teeth swing back and forth around the center of the upper end. In the front of the tooth, crush the excavated earth mass,
The excavated soil mass was only crushed by the movement in the front-rear direction at the time of vertical tooth swing, so if the mass was pushed back and forth and escaped, the crushing performance was reduced. In other words, in the conventional vertical tooth, the soil mass could not be crushed unless the earth mass was strongly in contact with the front surface of the vertical tooth during excavation. In other words, since the cultivating claws and shafts during tilling cannot be forced to fly the soil mass unless they are turned quickly, if the rotation speed of the cultivating shaft decreases due to resistance in the case of soil with a large excavation resistance containing clay and water, It was easy to cause a problem that the soil breaking performance was extremely reduced.

[0003]

SUMMARY OF THE INVENTION The present invention takes the following technical means in order to solve the above-mentioned problems. That is, in the first invention, the main cover 3 covers substantially the upper part of the left and right cultivating claw shaft 2 in which the cultivating claws 1 are arranged and attached,
In a rotary tiller that covers the rear of the cultivating claw shaft 2 with a rear cover 4, a plurality of vertical teeth 6, 6. . . And a horizontal screen 7 protruding rearward from the lower end of the vertical tooth 6, and a swing screen 8 swinging in the front-rear direction with the main cover 3 side as an axis.
And a rotary tilling device having the configuration described above.

According to a second aspect of the present invention, the projecting direction of the horizontal teeth 7 projecting rearward from the lower ends of the vertical teeth 6 in the swinging screen 8 is extended substantially in the horizontal direction. Rotary tilling device.

[0005]

The present invention is constructed as described above, so that when the vertical tooth 6 swings back and forth, the horizontal tooth 7 moves up and down, and the lower surface of the horizontal tooth 7 presses the earth mass toward the ground. Can be easily broken. If the horizontal tooth 7 is protruded long in the substantially horizontal direction, the length acting on the upper surface of the earth mass is increased, and the soil breaking effect is further improved.

[0006]

Embodiments of the present invention will be specifically described below with reference to the drawings. The rotary tillage device 5 during the tillage excavation work has a top link 1 at a position shown in a side view of FIG.
It is suspended via a three-point link device 12 composed of 0, left and right lower links 11, 11 and the like, and when excavation work is completed, the movable agricultural machine is suspended above a rear portion thereof.

[0007] A central transmission case 13 is provided at the center in the left-right direction, and the input shaft 1 is connected to the rear PTO shaft 14 of the mobile agricultural machine.
5, the driving force on the driving side is transmitted, and the driving force is transmitted to the tilling shafts 2 and 2 projecting from the lower part of the central transmission case 13 to the left and right. On the outer periphery of the cultivating shaft 2, cultivating claws 1, 1. . . Are mounted in a detachable manner. Swing screen 8
The relationship between and the tilling shaft 2 is as shown in FIG. 1 and will be described below.

On the lower surface of the ceiling of the main cover 3 covering the upper part of the tilling shaft 2, a plurality of fixed teeth 16, 16. . . Is attached. The fixed tooth 16 is an elastic wire made of spring steel, such as a piano wire, and has a radius substantially along the nail rotation outer diameter at a predetermined interval so as not to interfere with the tilling nail 1.
As shown in the perspective view of FIG. 2, the vertical tooth 6 of the oscillating screen 8 has a fixed tooth 1 in a side view.
6 are alternately arranged in a zigzag pattern having substantially the same shape as the upper shaft 17.
Swings in the front-rear direction around.

A rotary plate 19 having an eccentric fulcrum shaft 18 is attached to the side of the central transmission case 13, and the eccentric fulcrum shaft 1 is provided.
The rod 8 is connected between the upper end 8 of the swinging screen 8 and the upper end of the upper shaft 17 projecting from the stay 20. Vertical tooth 6
At the lower end, a horizontal tooth 7 protrudes substantially horizontally in the direction of the rear cover 3.

A shaft 2 provided in the lateral direction at the rear end of the main cover 3
2, a rear cover 4 is suspended. Next, the operation will be described. By the rod 21 attached to the eccentric fulcrum shaft 18 of the rotating plate 19 which is rotated by a part of the driving force of the input shaft 15, the oscillating screen 8 swings back and forth about the upper shaft 17 as a fulcrum via a stay 20. The vertical tooth 6 of the oscillating screen 8 oscillates in the front-rear direction to crush the excavated earth mass by impact, and the horizontal tooth 7 crushes the upper earth mass on the ground side by hitting from above.

Tilling claws 1,1. . . Among the soil masses excavated in the above, those having a small outer diameter are used as the vertical teeth of the oscillating screen 8. . And fixed teeth 16, 16. . Scattered to the rear cover 4 side from the gap, and the vertical teeth 6,6. .
The soil mass larger than the tooth interval, the movement of which is restricted by the fixed teeth 16, 16, is pushed below the plowed soil. Fine soil on the surface of the tilled soil is leveled down by the rear cover 4 of the rotary tilling device 5 as the mobile farming machine advances.

[0012]

FIG. 4 shows a side drive rotary device 25 having upper transmission frames 26 projecting from the central transmission case 13a in the left-right direction.
A transmission case 27 is connected to one side in the left-right direction of the upper transmission frame 26, and a supporter frame 28 is connected to the other side so that each of the upper transmission frame 26 is suspended. Has been established. As shown in the drawing, a lower sprocket 32 having an upper portion engaged with an upper sprocket 30 of a transmission shaft 29 and a lower portion pivotally mounted on a drive shaft 31 is attached to the transmission case 27.
And a transmission chain 33, which is mounted on the transmission chain 33. Also, drive shaft 3
A mounting flange 34 is integrally provided at the inner end of the support frame 1, and a mounting shaft 34 at the lower end of the supporting machine frame 28 is also provided with a mounting flange 34 at the inner end. ing.

As shown in FIG. 6, small-diameter vertical walls 38 of a rotary plate 37, which are interposed plates, are attached to the outer end surfaces of the left and right mounting plates 36 provided at both ends of the tilling claw shaft 2 from outside. It is attached to a plate 3636. The mounting plates 36, 36 integrally provided on both ends of the tilling claw shaft 2 by welding (plug welding) or the like have a substantially rectangular outer shape, and have holes at four protruding corners. The rotating plate 37 is made of spring steel and has a flat large-diameter standing wall 39 whose outer diameter is substantially the same as the rotation locus of the tilling claw 1, and a small-diameter standing wall 3 formed by drawing a general steel material in a deep dish shape.
8, the outer peripheral edge of the small-diameter standing wall 38 is welded to the side wall surface of the large-diameter standing wall 39 by welding or bolts or the like. Both the large-diameter standing wall 39 and the small-diameter standing wall 38 are provided with large- and small-diameter central openings 40 and 41, respectively.

In the illustrated example, the large-diameter standing wall 39 has a diameter of 500 mm.
A large-diameter central opening 40 is provided in the center. Further, the small-diameter standing wall 38 has a substantially circular small-diameter central opening 41 and mounting holes 42, 42,. . . The mounting holes 42 are provided in the left and right mounting plates 3 described above.
In the hole at the corner of the rectangular shape of No. 6, it is fastened and fixed freely by a bolt. FIG. 7 shows a rotating plate 37 as an interposition plate.
In this figure, one of the left and right mounting flanges 34, 34 passes through the small-diameter central opening 41. Further, although details will be described later, a total of eight outer mounting holes 43, 43. . The heads of rods 44, 44 each composed of two bolts on the left and right sides are inserted into the outer mounting holes 43, respectively.
The large-diameter central opening 40 extends inward so as to cover the end of the rod 44. In the illustrated example, the outer diameter of the trajectory during rotation of the rod 44 is about 250 mm, and the head of the rod 44 is inserted and attached at a position about half the diameter of the rotating plate 37,
The left and right thread portions of the right and left opposing rods 44 are tightened with the left and right rods 44 near the claw holder 46 by rotating a long nut 45 having a right-hand thread and a left-hand thread portion to one side.

Claw holders 46, 4 for mounting the tilling claws 1
6. . Among them, as shown in FIG. 4, the claw holders 46a on both sides of the outermost end are provided in a pair in a vertical direction in a side view.
Each of the claw holders 46a is provided with a slanted ratchet claw 1n whose claw tip is inclined inward. The second from the outer end is provided with a single claw holder 46b and a flat claw with the claw tip side inclined inward. Further, the nail holders 46, 46. .
Are provided one by one in the up-down or front-rear direction, and a pair of inwardly facing and outwardly facing nails are attached to the nail holders 46, 46, respectively.

In the illustrated example, the rotating plate 37 is provided with the tilling claw 1.
Is a disk formed to have a radius substantially equal to the turning radius at the time of excavation, and between the outside of the outermost cultivating claw 1 at one end and the inside of the transmission case 27, and the outside of the other outermost cultivating claw 1 at the other end. These are isolated from the inside of the supporting machine frame 28, and the rotating plate 37 is approached to the transmission case 27 on the wall side or the inner surface side of the supporting machine frame 28 so as to have a gap of 15 mm or less at the maximum. Then, as described above, the tilling claw shaft 2 is integrally attached to the mounting plates 36, 36 which are integrally provided on both ends of the tilling nail shaft 2 by welding or the like. As will be described in detail later, the outer diameter of the rotating plate 37 is approximately 5 cm in radius with respect to the turning radius of the tilling claw 1 when excavating.
The same purpose and effects are obtained from a small diameter to a large diameter.

Next, attachment of the rod 44 will be described. The rod 44 is a left-handed bolt and a right-handed bolt having a thickness of about 10 mm, and four sets of bolts are inserted into outer mounting holes 43 provided near the outer periphery of the small-diameter vertical wall 38 of the rotating plate 37. Are tightened up by four long nuts to firmly attract the left and right rotating plates 37 to each other. Since the bolt and the long nut 45 like a turnbuckle are used, attachment and detachment and adjustment of the rod 44 are very easy.

[0018]

[Operation and effects of the first separate example] Rotary tillage equipment is widely used throughout the year, including paddy field cultivation in spring and autumn, alternative scraping before rice planting, paddy cultivation ridges, and field cultivation,
It is an indispensable work machine for Japanese farmers. The rotary tilling apparatus includes a side drive type rotary and a center drive type rotary depending on the layout of the drive mechanism.
Account for the percentage. In the embodiment of the present invention, the rotary tilling device 25 of the side drive type is used for tilling the field after the rush is harvested.

The tilling apparatus 25 configured as described above
When rotational power is transmitted from the fuselage side to the transmission shaft 29, the tilling claw shaft 2 is transmitted in the order of the upper sprocket 30, the transmission chain 33, the lower sprocket 32, the drive shaft 31, the mounting flange 34, the mounting plate 36, and the rotating plate 37. Then, the tilling claw 1 is driven to start the tilling operation. At that time, the tilling claws 1, 1. .
The grass, long culm, waste rush and the like scattered outside the width of the rotary tilling part are drawn toward the cultivating claw shaft 2 side. An attempt is made to enter around the mounting flange 34 of the shaft 31 and around the mounting flange 34 of the support shaft 35 on the supporting machine frame 28 side. However, the rotation plates 37, 37 restrict the movement of grasses, long culms, waste rushes, and the like scattered inward from the excavated soil surface in the field outside the width of the rotary tilling part, because the actual part is pressed against the topsoil. Or it is cut off by pressing, a part of it will be forcibly pulled around the tilling claw shaft 2 and will be wound around, or a part will be shortened and remain on the surface outside the width,
Some move away as if they are shaken off.

As described above, the grass, the long culm, the waste rush, and the like are pressed by the outer peripheral edge of the rotating plate 37. . Even if it is to be wound around the middle part of the tilling claw shaft 2, it is shaken off by the four rods 44, and the tilling claw shaft 2 is mounted on the transmission case 27 side and the support machine frame 28 side. Neither does it penetrate into the end nor wrap around the tilling claw shaft 2.

As described above, according to the embodiment of the present invention, since there is almost no invasion of grass, culm, waste rush, etc. at the mounting end of the tilling claw shaft 2, the transmission cable for the wound grass as in the prior art is used.
The seal 27 and the seal of the bearing portion of the supporting machine frame 28 are free from problems such as pain and oil leakage.

[0022]

FIG. 8 shows a rotary plate 37a.
It is the example of the 2nd figure of attachment. In this example, the tilling claw shaft 2
The mounting plate 36a to be integrally welded to both ends is formed as a flat disk. The pair of upper and lower claw holders 46, 46 at the outermost ends are mounted with offset tilling claws 1d, 1d which are shifted toward the mounting plate 36a.

The center opening 49 of the rotary plate 37a is inserted into the circular mounting plate 36a, and the presser fittings 50, 50 are pressed while the inner surface of the rotary plate 37a is pressed against the offset tilling claws 1d, 1d.
Through the bolts 51, 51. . Fix with. Rods and bolts for preventing grass winding are provided at outer mounting holes 43a, 43a. . If it is inserted into the tilling claw shaft 2, it has substantially the same operation and effect as the first separate example, but with such a configuration, the tilling claw shaft 2 has a circular shape without a corner mounting portion which is a square flange. Even in the case of the mounting plate 36a, since the rotating plate 37a can be mounted using the tilling claw, it can be mounted on any kind of rotary tilling apparatus.

[0024]

FIG. 9 shows a rotary plate 37b.
It is the example of the 3rd figure of attachment. In this example, the tilling claw shaft 2
The mounting plate 36a to be integrally welded to both ends is formed as a flat disk. Also, on the outer periphery of the tilling nail shaft 2, nail holders 46, 46. . . Are provided, and the normal tilling claws 1, 1. . . Is installed.

This example is also a side drive rotary device, and the upper transmission frame 2 extends in the left-right direction from the central transmission case.
6, 26 are protruding. A transmission case 27 is connected to one side of the upper transmission frame 26 in the left-right direction, and a supporter frame is connected to the other side to be in a hanging state. are doing. And, although not shown,
In the transmission case 27, there is provided a transmission device composed of a transmission chain having an upper portion engaged with an upper sprocket of the transmission shaft and a lower portion mounted on a lower sprocket which is mounted on the drive shaft. The configuration is as follows. Further, a mounting flange 34b is integrally provided at the inner end of the drive shaft. A mounting flange 34b (not shown) is also provided on the inner end of the support shaft at the lower end of the supporting machine frame on the opposite side, and both left and right mounting flanges 34b, 34b are provided to face each other.

The mounting flange 34b has a quadrangular shape, and a screw hole 53 is provided at a corner portion by a tap or the like.
Further, the central portion protrudes as a bulging seat surface 54 bulging in a circular shape, and the central opening 49 of the rotating plate 37b is fitted into the bulging seat surface 54, and the mounting holes 55, 55. . And the screw holes 53, 53. . At the corresponding position with bolts. With this configuration, the left and right rotating plates 37b, 37b
Are fixed to the left and right mounting flanges 34b, 34b, respectively.

The tilling claw shaft 2 can be removed from the left and right bulging seat surfaces 54 by simply removing the bolts of the mounting plate 36a, which are integrally welded to both ends of the claw shaft, from the tap screw holes 56 of the bulging seat surface 54. It can be easily removed. Left and right rotating plates 37b,
37b have outer mounting holes 43a, 43a. . To the rotating plate 3
There are four openings near the outer periphery of 7b.

[Brief description of the drawings]

FIG. 1 is an overall side view of a tilling apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of FIG. 1 according to the embodiment of the present invention.

FIG. 3 is an embodiment of the present invention and is an overall side view attached to a mobile agricultural machine.

FIG. 4 is an example of another main part, and is a rear cross-sectional view of the whole partly developed.

FIG. 5 is an enlarged view of a main part of FIG.

FIG. 6 is an enlarged view of a main part of FIG.

FIG. 7 is a side view of a main part of FIG. 6;

FIG. 8 is a perspective view of another main part of the second embodiment.

FIG. 9 is a perspective view of another main part of the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tilling claw 2 Tilling claw shaft 3 Main cover 4 Rear cover 6 Tooth 7 Horizontal tooth 8 Swinging screen

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B033 AA05 AB01 AB11 AC04 BA01 BB02 BC04 BC12 BD06 CA04 DB37 EB01 EB06 ED08

Claims (2)

[Claims] A main cover (3) covers substantially the upper part of a left-right cultivating claw shaft (2) on which tilling claws (1) are arranged and mounted.
, A plurality of vertical teeth 6, 6... Between the cultivating claw shaft 2 and the rear cover 4 in a rotary cultivator covering the rear of the vehicle with a rear cover 4. . . And a horizontal screen 7 projecting rearward from a lower end of the vertical tooth 6 and a swing screen 8 swinging in the front-rear direction about the main cover 3 as an axis. Tillage equipment. 2. A vertical tooth 6 on an oscillating screen 8.
2. The projecting direction of a lateral tooth 7 projecting rearward from a lower end thereof is extended substantially in a horizontal direction.
The rotary tillage device according to the above.