JP4053446B2 - Grass wrap prevention device for rotary tillers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grass wrap prevention device for a rotary tiller.
[0002]
[Prior art]
In this type of prior art, a linear member is installed between tilling claws spaced apart from each other in the axial direction of the nail shaft, and the nail shaft around which grass (including vines, stems, remaining trunks, etc.) is wound by this linear member The winding diameter is increased to prevent the grass from being wound (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-121608 [0004]
[Problems to be solved by the invention]
Although the above-mentioned conventional linear member also exhibits a certain degree of grass wrapping prevention function, it may be difficult to remove for long grasses such as a lotus root remnant trunk, and from above the linear member The grass may be wound, and it may be difficult to secure the tilling depth, the mud scatters, the maintenance of the claws becomes difficult, the mass of the rotary tiller increases, and the balance deteriorates.
An object of the present invention is to provide an apparatus for preventing grass winding of a rotary tiller that can solve such problems of the prior art.
[0005]
An object of the present invention is to provide a grass wrap prevention device for a rotary cultivator provided with a cutting member on the inner side of a rotary cover so as to cut grass that winds around a claw shaft between tilling claws.
[0006]
[Means for Solving the Problems]
Specific means for solving the problems in the present invention are as follows.
First, a tilling claw 2 that has an arcuate blade portion 30 preceded by the blade base 30a side and followed by the blade tip 30b side for downcut cultivation is provided on the claw shaft 3, and the claw shaft 3 with the cultivation claw 2 rotates. A cutting member 6 that rushes into the inside of the rotary cover 5 that covers the tillage portion 4 from the outside of the tillage portion 4 to the inside and cuts the grass wound around the nail shaft 3 between the tillage claws 2 is spaced in the width direction of the tillage portion 4. There are a plurality of
A band plate 7A is detachably fixed to the inner surface rear portion of the upper cover 5A of the rotary cover 5, and a plurality of fixing plates 7B are provided on the band plate 7A at intervals in the longitudinal direction. A cutting member is provided on each fixing plate 7B. 6 is detachably attached,
The cutting member 6 is directed from the rear upper side of the claw shaft 3 to the claw shaft 3, and its tip is positioned in the vicinity of the blade base 30 a of the tilling claw 2.
[0007]
2ndly, the said cutting member 6 is the cutting blade part 8 which inclined from the cutting edge 8b located in the diameter inside of the tilling part 4 to the blade base 8a located in the diameter outside from the preceding side to the trailing side of the rotation nail 2 rotation direction. It is characterized by having.
The present invention has the following features.
First, the grass that wraps around the claw shaft 3 between the cultivating claws 2 by rushing inward from the outside of the cultivating section 4 inside the rotary cover 5 that covers the cultivating section 4 on which the claw shaft 3 with the cultivating claw 2 rotates. The cutting member 6 to be cut is provided.
[0008]
As a result, the cutting member 6 cuts the grass wound around the claw shaft 3 between the tilling claws 2 and can solve the problem caused by the wound grass.
Secondly, a plurality of cutting members 6 are detachably attached to the inner surface of the upper cover 5 </ b> A of the rotary cover 5 at intervals in the width direction of the tilling portion 4.
Thereby, the grass can be cut at a plurality of positions in the width direction of the tillage portion 4, and the plurality of cutting members 6 can be easily provided on the inner surface of the rotary cover 5.
3rdly, the said cutting member 6 is the cutting blade part 8 inclined from the cutting edge 8b located in the diameter inside of the tilling part 4 to the cutting edge 8a located in the diameter outside from the preceding side in the rotation direction of the tilling nail 2 to the following side. It is to have.
[0009]
This makes it possible to cut the grass more smoothly.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4, reference numeral 1 denotes a rotary cultivator mounted on the rear portion of the tractor 12 via a three-point link mechanism 13, and can be moved up and down by a hydraulic lifting device 14 at the upper rear portion of the tractor 12.
The rotary cultivator 1 has a support arm 16 projecting left and right from a central gear case 15, a transmission case 17 is provided at the left end of the left support arm 16, and a side frame 18 is provided at the right end of the right support arm 16. The claw shaft 3 is rotatably supported between the lower portions of the side frames 18.
[0011]
The gear case 15, the left and right support arms 16, the transmission case 17, the side frame 18, and the like constitute a rotary machine frame 20. A top link connecting portion 21 is formed on the gear case 15, and the left and right support arms 16 project forward. A lower link bracket (not shown) is provided.
The top link connecting portion 21 and the lower link bracket of the rotary machine frame 20 are normally connected to the rear ends of the top link 22 and the lower link 23 of the three-point link mechanism 13, but here the top link 22 and the lower link are connected. A quick hitch 24 is connected to a rear end of the quick hitch 24, and upper and lower parts of the quick hitch 24 are detachably connected to the top link connecting portion 21 and the lower link bracket, respectively.
[0012]
A number of claw brackets 27 are fixed to the claw shaft 3 at intervals in the axial direction and the circumferential direction, and the base portion of the tilling claw 2 is inserted into each claw bracket 27 and is prevented from being detached by a fastener 28 such as a bolt. Yes.
The claw shaft 3 with the cultivating claw 2 rotates around the horizontal axis to form a cultivating portion 4, and a rotary cover 5 covering the cultivating portion 4 is attached to the rotary machine frame 20.
The rotary cover 5 includes a top cover 5A attached to the support arm 16, the transmission case 17, the side frame 18 and the like so as to cover the tillage portion 4 from above, and a rear portion of the top cover 5A via a horizontal axis. The rear cover 5B is connected so as to freely move up and down, and the side cover 5C covers the left and right sides of the upper cover 5A and the rear cover 5B.
[0013]
A grass curling prevention device 10 is disposed on the inner surface (the surface on the side of the tillage section 4) of the upper cover 5A. This grass-rolling prevention device 10 is configured by providing a plurality of cutting members 6 at an interval in the width direction of the tillage portion 4 on an attachment member 7 fixed to the inner surface of the upper cover 5A.
The attachment member 7 is formed by vertically welding a plurality of fixing plates 7B to the belt plate 7A at longitudinal intervals, and is welded or bolted to the upper cover 5A. The cutting member 6 is the fixing plate. It is detachably bolted to 7B, and plunges from the outside of the tillage part 4 to the inside.
[0014]
The cutting member 6 has a tapered cutter knife shape, and the tip of the cutting member 6 may be inserted into a position where the cutting member 6 does not come into contact with the grass-wound preventing linear member 31, but in the vicinity of the cutting edge 30 a of the arcuate blade portion 30 of the tilling claw 2. Is located.
Each cutting member 6 is located between the tilling claws 2 on the claw shaft 3, preferably in the center between the claw claws 2 or in the vicinity thereof, and when the tilling claws 2 are open claws and the spacing between the tilling claws 2 is short, The bending of the tilling claw 2 in the direction of the claw axis 3 is preferably changed from the direction indicated by the two-dot chain line in FIG. 3 to the direction indicated by the solid line in FIG. 3, that is, the direction away from the cutting member 6 in the direction of the claw axis 3. .
[0015]
The cutting member 6 is formed with a single blade (or a double blade), and the cutting blade portion 8 may be arranged in a radial direction passing through the center of the claw shaft 3, but the tip is directed to the front of the claw shaft 3. Thus, the blade 8 is inclined from the leading side in the rotation direction of the tilling claw 2 to the trailing side from the cutting edge 8 b located inside the diameter of the tilling portion 4 to the cutting edge 8 a located outside the diameter. That is, as shown in FIG. 2, the cutting blade portion 8 is inclined by an angle E with respect to the radiation of the claw shaft 3.
When the rotary cultivator 1 performs upper-cut tillage, the tilling claw 2, which is a claw, is wound around the tilling claw 2 because the cutting edge 30a side of the arcuate blade portion 30 precedes and the cutting edge 30b side follows. The grass abuts on the blade base 30a side of the tilling claw 2 and is cut while moving the arc blade portion 30 to the blade tip 30b side. At that time, the grass that cannot be cut by the cultivation claw 2 is accompanied with the cultivation claw 2 It moves and is pressed against the cutting blade portion 8 of the cutting member 6.
[0016]
The grass pressed against the cutting blade portion 8 is pushed from the blade edge 8b side to the blade base 8a side by the arc blade portion 30 of the tilling claw 2 and is cut by the cutting blade portion 8 at that time. When the grass is pushed from the blade edge 8b side to the blade base 8a side, if the cutting blade portion 8 has the inclination angle E, it will receive a pushing resistance than when it is arranged in the radial direction, There will be less grass escape and more reliable cutting. Further, the cutting blade portion 8 has a tapered shape, so that it is possible to efficiently release the external force received from the grass or the like.
[0017]
When the rotary tiller 1 is used for down-cut tillage, the cutting member 6 is reversed and attached to the attachment member 7. In this attachment, the cutting member 6 has a tip directed toward the rear of the claw shaft 3, and a cutting edge located outside the diameter from the cutting edge 8 b located inside the diameter of the tilling portion 4 with respect to the tilling claw 2 rotating down-cut. Over the 8a, the tilling claw 2 is inclined from the leading side in the rotational direction to the trailing side.
One or a plurality of linear members 31 for preventing grass winding are stretched on the claw shaft 3 so as to be displaced in the circumferential direction. The linear member 31 is formed of a wire, a string, a rope, or the like, and both ends are connected to the mounting stay 32. The mounting stay 32 is fitted to the tilling claw 2 positioned at or near both ends of the claw shaft 3 and is detachably attached to the claw shaft 3 so as to increase the wrapping diameter of the grass around the claw shaft 3. This prevents the wrapping of grass.
[0018]
The linear member 31 prevents winding of a relatively short grass, whereas the cutting member 6 is useful for preventing winding of a relatively long grass. It is possible to more reliably prevent various long and short grasses from being wound around.
In FIG. 1, reference numeral 35 denotes a rear cover angle control means provided between the support arm 16 of the rotary machine casing 20 and the rear cover 5B, and the angle (lower end height) of the rear cover 5B can be changed or leveled. The flat pressure can be adjusted and the rear cover 5B can be floated.
[0019]
When plowing a field after lotus root harvesting, the rear gauge wheel is not used, the rear cover angle control means 35 is set in a free floating state, and the angle of the rear cover 5B is detected by an angle detection means (not shown). The rotary tiller 1 is lifted and lowered by the hydraulic lifting / lowering device 14 so that the angle of the rear cover 5B is detected, but the amount of tire subsidence changes depending on the field conditions, and the rotary tiller 12 with respect to the tractor 12 is rotated. The position of the machine 1 may be different.
As described above, in a high-humidity field such as a lotus field, when the rotary cultivator 1 is used in water or mud, the position of the tractor 12 with respect to the rotary cultivator 1 changes, and the actual tilling depth is not known. There is.
[0020]
Therefore, the top link bracket 36 connecting the front end of the top link 22 is connected to the top link bracket 36 so that the approximate tilling depth can be visually determined from the angle of the top link 22 that changes with the tilling depth of the rotary cultivator 1 with respect to the tractor 12. A link angle visualizing means 37 is provided.
In FIGS. 1, 5, and 6, a top link bracket 36 for constituting a special three-point link mechanism is connected to a top link mounting base 38 on the rear surface of the tractor 12 via a pin and a rattling stopper. A visual recognition member 39 is bolted to the rear end of the link bracket 36.
[0021]
The visual recognition member 39 is obtained by fixing an arc plate 39B to the upper edge of a flat plate 39A fixed to the top link bracket 36. The arc plate 39B has a center of curvature at the center of a pin 40 connecting the top link 22, An angle display symbol (gauge) is written on the upper surface (or the side surface).
When the top link 22 swings around the pin 40, the angle of the top link 22 is visually recognized by looking at the angle display symbol of the visual recognition member 39 corresponding to the swing position of the top link 22, thereby rotary tillage. The plowing depth of the machine 1 can be estimated.
[0022]
In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the grass-rolling prevention device 10 can attach the attachment member 7 to the transmission case 17 and the side frame 18 or can be attached to the inner surface of the rear cover 5B. The base portion of the cutting member 6 may be L-shaped, and a plurality of cutting members 6 may be detachably attached to the rotary cover 5 individually.
[0023]
【The invention's effect】
According to the present invention described in detail above, when grass is wound around the claw shaft 3, the grass can be cut between the tilling claws 2 by the cutting member 6, and the problems caused by the wound grass can be solved.
[Brief description of the drawings]
FIG. 1 is an overall side view showing an embodiment of the present invention.
FIG. 2 is a sectional side view of an essential part.
FIG. 3 is a rear view of a main part.
FIG. 4 is a perspective view of a main part.
FIG. 5 is a side view of the top link angle visualizing means.
FIG. 6 is a plan view of the top link angle visualizing means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary cultivator 2 Tillage nail 3 Claw shaft 4 Plowing part 5 Rotary cover 5A Upper cover 5B Rear cover 6 Cutting member 7 Mounting member 7A Band plate 7B Fixed plate 8 Cutting blade part 8a Blade base 8b Cutting edge 10 Grass winding prevention device E Cutting Blade inclination angle

Claims (2)

A tilling claw (2) having an arcuate blade portion (30) preceded by the blade base (30a) side and following by the blade tip (30b) side and cultivated by down-cutting is provided on the claw shaft (3). ) The claw shaft (3) is inserted into the rotary cover (5) that covers the rotation portion (4) where the rotation of the claw shaft (3) rotates from the outside of the cultivation portion (4) to the inside. ) A plurality of cutting members (6) for cutting the grass that wraps around are provided at intervals in the width direction of the tillage part (4),
A strip plate (7A) is detachably fixed to the inner surface rear portion of the upper cover (5A) of the rotary cover (5), and a plurality of fixing plates (7B) are provided on the strip plate (7A) at intervals in the longitudinal direction. A cutting member (6) is detachably attached to each fixing plate (7B),
The cutting member (6) is directed from the rear upper side of the claw shaft (3) to the claw shaft (3), and its tip is positioned in the vicinity of the blade edge (30a) of the tilling claw (2). Grass wrap prevention device for rotary tillers.   The cutting member (6) extends from the cutting edge (8b) positioned inside the diameter of the tillage part (4) to the cutting edge (8a) positioned outside the diameter, from the leading side to the trailing side of the tilling claw (2) in the rotational direction. The apparatus for preventing weeding of a rotary tiller according to claim 1, characterized in that it has an inclined cutting blade (8).

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