JP2024053066A - Cultivation tines and agricultural implements - Google Patents

Abstract

[Problem] To extend the life of a tillage tine and prevent a decline in tillage performance. [Solution] The tillage tine disclosed herein is a tillage tine having a mounting base attached to a tillage shaft and a blade portion extending continuously from the mounting base, and a hard alloy portion having a higher hardness than other portions is provided on the blade edge side of the blade portion, and an end of the hard alloy portion on the mounting base side intersects with an extension line in the extension direction of the mounting base within the range of the width dimension of the mounting base, and a ridge side end of the hard alloy portion extends along the ridge at a substantially constant distance from the ridge of the blade portion toward the blade edge side. The blade portion may be curved to one side in the axial direction of the tillage shaft, and the hard alloy portion may be provided on the surface opposite to the direction in which the blade portion is curved. [Selected Figure] Figure 6

Description

The present invention relates to a tilling tine that is attached to the tilling shaft of a ridge-spreading machine having a rotary tilling device used for tilling work, for example.

Conventionally, this type of tillage claw has an attachment base that is attached to the tillage shaft, a vertical blade that extends continuously from the attachment base, and a horizontal blade that extends continuously from the vertical blade, and is curved in the opposite direction to the rotation direction of the tillage shaft from the vertical blade to the horizontal blade, and the horizontal blade is curved to one side in the direction of the rotation axis of the tillage shaft relative to the vertical blade (see, for example, Patent Document 1).

The tilling tines have a hard alloy section on the blade edge of the side blade that comes into contact with the soil, which is harder than other parts. By bringing the hard alloy section into contact with the soil during tilling work, it is less likely to wear out, and the durability of the rake face, which comes into most contact with the soil, is improved.

A number of tilling tines are attached to the tilling shaft in the circumferential and axial directions. The upper and axial ends of the tilling shaft to which the tilling tines are attached are covered by a cover body.

Japanese Utility Model Application Publication No. 05-91202

The tillage tines adjacent to the cover body covering the axial end of the tillage shaft may come into contact with the soil adhering to the inner surface of the cover body. Since the tillage tines are provided with a hard alloy part mainly on the horizontal blade part (scooping surface part), if the vertical blade part continues to come into contact with the soil adhering to the inner surface of the cover body, uneven wear occurs in which the vertical blade part wears more than the horizontal blade part. As a result, the tillage tines adjacent to the cover body covering the axial end of the tillage shaft must be replaced early to prevent damage and deterioration of tilling performance due to uneven wear.

The objective of the present invention is to provide a tillage tine that is less prone to uneven wear, thereby extending its life and preventing a decline in tillage performance.

In order to achieve the above-mentioned object, the present invention provides a tillage claw having a mounting base attached to a tillage shaft, a vertical blade portion extending continuously from the mounting base, and a horizontal blade portion extending continuously from the vertical blade portion, the tillage claw being curved in the opposite direction to the rotational direction of the tillage shaft from the vertical blade portion to the horizontal blade portion, and the horizontal blade portion being curved to one side in the direction of the rotational axis of the tillage shaft relative to the vertical blade portion, and a hard alloy portion having a harder hardness than other portions is provided on the blade edge side of the vertical blade portion and the horizontal blade portion from the vertical blade portion to the horizontal blade portion, and the end of the hard alloy portion on the mounting base side is located in the vicinity of an extension line in the direction in which the mounting base extends.
As a result, the hard alloy portion is located on the blade edge extending from the vertical blade portion to the horizontal blade portion, so that when used as a tillage tine adjacent to a cover body covering the axial end of the tillage shaft, the hard alloy portion comes into contact with the soil adhering to the inner surface of the cover body.

According to the present invention, when used as a tilling claw adjacent to a cover body that covers the axial end of the tilling shaft, it is possible to bring the hard alloy part into contact with the soil adhering to the inner surface of the cover body, which makes it possible to suppress uneven wear in which the vertical blade part wears more than the horizontal blade part, thereby extending the life of the rotary tilling device and preventing a decline in the tilling performance of the rotary tilling device.

FIG. 1 is a plan view of a ridge coating machine showing one embodiment of the present invention. FIG. FIG. 1A is a side view of the pre-treatment unit with a part of the cover body removed, and FIG. 1B is a front view of the pre-treatment unit with a part of the cover body removed. FIG. FIG. This is a cross-sectional view taken along line AA in FIG. 5. (a) is a side view of the pre-treatment unit with a portion of the cover body removed to show another example of the soil removal member, and (b) is a front view of the pre-treatment unit with a portion of the cover body removed to show another example of the soil removal member.

Figures 1 to 7 show one embodiment of the present invention.

In this embodiment, we will explain a ridger 1 that has a rotary tilling device to which the tilling tines of the present invention are attached.

This ridger 1 has a mounting unit 10 that is mounted on a traveling vehicle T such as a tractor, an offset mechanism unit 20 that has one end connected to the mounting unit 10 and the other end movable in the width direction relative to the mounting unit 10, and a working unit 30 that is connected to the other end of the offset mechanism unit 20.

The mounting section 10 has a hitch frame 11 that extends in the width direction of the traveling body T. The hitch frame 11 is connected to a three-point linkage mechanism provided on the traveling body T via a connecting frame (not shown). An input shaft 12 to which power from the traveling body T is input is provided on the front side of the hitch frame 11.

As shown in FIG. 1, the offset mechanism 20 has an offset frame 21 whose front end is provided horizontally rotatably in the center of the hitch frame 11 in the width direction, a link member 22 whose front end is provided horizontally rotatably on one end side of the hitch frame 11 in the width direction, and a connecting member 23 that connects the rear end of the offset frame 21 to the rear end of the link member 22. The offset mechanism 20 forms a parallel link mechanism with the hitch frame 11, the offset frame 21, the link member 22, and the connecting member 23. The rear end of the offset mechanism 20 moves in the width direction by driving a hydraulic offset cylinder 24 provided between the other end of the hitch frame 11 in the width direction and the rear end of the offset frame 21.

A power transmission mechanism consisting of a chain, sprockets, etc. is provided within the offset frame 21 to transmit the power transmitted to the input shaft 12 to the working unit 30.

The working unit 30 has a top field processing unit 40 for cutting down the upper part of the old ridge K formed along the periphery of the field, a pre-processing unit 50 for cutting down the lower part of the old ridge K and piling up the cut soil, and a ridge leveling unit 60 for spreading the piled up soil over the cut old ridge K, and is supported so as to be freely rotatable in the horizontal direction on the rear end side of the offset mechanism unit 20. The working unit 30 rotates relative to the rear end side of the offset mechanism unit 20 by driving a hydraulic rotating cylinder 34 provided between a member on the connecting member 23 side and a member on the working unit 30 side.

As shown in FIG. 3, the top field processing unit 40 has a rotating shaft 41 that rotates by the power transmitted to the input shaft 12, and a number of tilling tines 42 that are attached to the outer periphery of the rotating shaft 41 at intervals in the circumferential direction. The rotating shaft 41 is positioned so that the front end extends diagonally forward toward the outside of the field relative to the rear end during ridge preparation work.

As shown in FIG. 3, the pre-treatment section 50 includes a tillage shaft 51 that rotates due to the power transmitted to the input shaft 12, a plurality of first tillage tines 52, second tillage tines 53, and third tillage tines 54 that are attached to the outer periphery of the tillage shaft 51 at intervals in the circumferential direction and arranged in the axial direction of the tillage shaft 51, a cover body 55 that covers predetermined portions of the first to third tillage tines 52, 53, and 54 from the outside, and a soil removal member 56 that is provided on the third tillage tine 54 and that removes soil adhering to the rear surface inside the cover body 55.

As shown in FIG. 1, the tilling shaft 51 is positioned so that, during ridge preparation work, the front end extends diagonally forward relative to the rear end toward the outside of the field. As shown in FIG. 4, three mounting plates 51a for mounting the first to third tilling tines 52, 53, and 54 are provided on the outer periphery of the tilling shaft 51 at intervals in the axial direction.

Each mounting plate 51a is a polygonal plate-like member with one dimension larger than the other, and the center of the longitudinal direction is fixed to the tillage shaft 51. On both longitudinal sides of each mounting plate 51a, a holder 51b is provided as a mounting part for holding the mounting bases of the first to third tillage tines 52, 53, and 54 described below.

The holder 51b is formed by fixing a plate-shaped member formed into a U-shaped cross section by bending both sides in the width direction to the mounting plate 51a. The holder 51b has insertion holes for inserting the mounting bases of the first tilling tine 52, the second tilling tine 53, and the third tilling tine 54, and a mounting hole for inserting the shaft of the bolt 57.

A first tilling claw 52 is attached to the mounting plate 51a located on the front side of the tilling shaft 51. A second tilling claw 53 is attached to the mounting plate 51a located second from the front of the tilling shaft 51. A third tilling claw 54 is attached to the mounting plate 51a located third from the front of the tilling shaft 51.

The first to third tilling tines 52, 53, 54 have mounting bases 52a, 53a, 54a attached to the holder 51b, vertical blades 52b, 53b, 54b extending continuously from the mounting bases 52a, 53a, 54a, and horizontal blades 52c, 53c, 54c extending continuously from the vertical blades 52b, 53b, 54b.

The mounting bases 52a, 53a, 54a have a predetermined width and are formed to extend linearly toward the vertical blades 52b, 53b, 54b. When the first to third tillage tines 52, 53, 54 are attached to the tillage shaft 51, the mounting bases 52a, 53a, 54a face radially outward from the tillage shaft 51. The mounting bases 52a, 53a, 54a are provided at the center of the width of the mounting bases 52d, 53d, 54d for inserting the shaft of the bolt 57. The first to third tillage tines 52, 53, 54 are attached to the holder 51b by inserting the mounting bases 52a, 53a, 54a into the insertion holes of the holder 51b and fastening them with the bolt 57 and nut 58.

When attached to the tillage shaft 51, the first to third tillage tines 52, 53, 54 have a shape that curves from the vertical blade portions 52b, 53b, 54b toward the horizontal blade portions 52c, 53c, 54c in the opposite direction to the rotational direction of the tillage shaft 51. In addition, when attached to the tillage shaft 51, the first to third tillage tines 52, 53, 54 have the horizontal blade portions 52c, 53c, 54c curved in the axial direction of the tillage shaft 51 relative to the vertical blade portions 52b, 53b, 54b.

Specifically, when the first and second tillage claws 52 and 53 are attached to the tillage shaft 51, the horizontal blades 52c and 53c are curved toward the rear end of the tillage shaft 51 relative to the vertical blades 52b and 53b. Also, when the third tillage claw 54 is attached to the tillage shaft 51, the horizontal blade 54c is curved toward the front end of the tillage shaft 51 relative to the vertical blade 54b.

When the first to third tillage tines 52, 53, 54 are attached to the tillage shaft 51, the vertical blades 52b, 53b, 54b and horizontal blades 52c, 53c, 54c form cutting edges on the side in the direction of rotation of the tillage shaft 51, and ridges on the side opposite the direction of rotation.

When the first to third tilling tines 52, 53, 54 are attached to the tilling shaft 51, the rotation radius R2 of the second tilling tine 53 is larger than the rotation radius R1 of the first tilling tine 52. Also, when the first to third tilling tines 52, 53, 54 are attached to the tilling shaft 51, the rotation radius R3 of the third tilling tine 54 is larger than the rotation radius R2 of the second tilling tine 53.

The blade edges of the vertical blade portion 54b and horizontal blade portion 54c of the third tillage claw 54 are provided with a hard alloy portion 54e made of an alloy that is harder than the other portions from the vertical blade portion 54b to the horizontal blade portion 54c. The hard alloy portion 54e is formed by welding a hard alloy to the surface on the opposite side to the direction in which the horizontal blade portion 54c is curved relative to the vertical blade portion 54b. The hard alloy portion 54e protrudes from the surface on the opposite side to the direction in which the horizontal blade portion 54c is curved relative to the vertical blade portion 54b.

The end of the hard alloy part 54e on the mounting base 54a side is located near the extension line of the mounting base 54a. The tip end of the hard alloy part 54e is located near the end of the horizontal blade part 54c. Here, when the third tillage claw 54 is attached to the tillage shaft 51, it is desirable that the end of the hard alloy part 54e on the mounting base 54a side is located on the extension line of the center of rotation of the tillage shaft 51 and the widthwise center of the insertion hole 54d of the mounting base 54a, but it is also acceptable that the end of the hard alloy part 54e intersects with the extension line of the mounting base 54a within the range of the width dimension of the mounting base 54a.

The end of the hard alloy portion 54e on the ridge side extends along the ridge at a predetermined distance toward the cutting edge from the ridges of the vertical blade portion 54b and the horizontal blade portion 54c.

The bending start point P1, which is the boundary between the vertical blade portion 54b and the horizontal blade portion 54c and is the intersection of the bending start line LS where the bending of the horizontal blade portion 54c begins relative to the vertical blade portion 54b and the blade edge, is at the farthest distance D from the base end of the mounting base portion 54a in the direction in which the mounting base portion 54a extends.

The cover body 55 has an outer peripheral plate portion 55a that covers the outer peripheral portions of the first to third tillage tines 52, 53, 54 except for the side and lower portions on the old ridge K side, a front plate portion 55b that extends from the front end of the outer peripheral plate portion 55a toward the radial inside of the tillage shaft 51, and a rear plate portion 55c that extends from the rear end of the outer peripheral plate portion 55a toward the radial inside of the tillage shaft 51. The front plate portion 55b covers only the outer peripheral side of the first to third tillage tines 52, 53, 54 along the front end of the outer peripheral plate portion 55a. The rear plate portion 55c covers the portion of the first to third tillage tines 52, 53, 54 including the tillage shaft 51 on the side opposite the old ridge K. The rear plate portion 55c is positioned, for example, 10 mm away from the hard alloy portion 54e provided on the vertical blade portion 54b of the third tilling tine 54.

The soil removing member 56 is formed by bending a plate-shaped member. The soil removing member 56 covers the rotation direction side of the holder 51b that holds the mounting base 54a of the third tillage tine 54, and extends radially outward from the holder 51b to cover the rotation direction side of the periphery of the mounting base 54a of the third tillage tine 54 held by the holder 51b. The soil removing member 56 is formed such that its width dimension is larger than the combined dimension of the mounting plate 51a and the holder 51b and the thickness dimension of the vertical blade portion 54b of the third tillage tine 54. The soil removing member 56 is attached to the holder 51b together with the third tillage tine 54 by bolts 57 and nuts 58.

As shown in FIG. 1, the ridge trimming section 60 is provided so as to extend in the width direction and has a rotating shaft 61 that rotates by the power transmitted to the input shaft 12, a polyhedral drum 62 provided on the rotating shaft 61, and a cylindrical section 63 provided so as to extend in the width direction from the end of the polyhedral drum 62.

The ridge coating machine 1 configured as described above is attached to the traveling body T and moves together with the traveling body T at a position shifted to the side relative to the traveling position of the traveling body T to perform ridge coating work. The ridge coating machine 1 cuts down the upper part of the old ridge K with the top surface processing unit 40, and cuts down the lower part and sides of the old ridge K with the pre-processing unit 50. The ridge coating machine 1 supplies the soil of the old ridge K cut down by the top surface processing unit 40 and the pre-processing unit 50 to the old ridge K side with the pre-processing unit 50. The ridge coating machine 1 forms a new ridge by applying the soil supplied to the old ridge K side by the pre-processing unit 50 to the surface of the old ridge K with the ridge preparation unit 60.

In the pretreatment section 50 during ridge painting work, the soil of the old ridge K that has been cut down and thrown up by the first to third tilling tines 52, 53, 54 is guided to the cover body 55 and supplied to the old ridge K side. The soil guided to the cover body 55 moves toward the old ridge K side while contacting the inner surface of the cover body 55. For this reason, some of the soil guided to the cover body 55 tends to adhere to the inner surface of the cover body 55, and in particular, a large amount of the soil may adhere to the rear plate portion 55c of the cover body 55.

At this time, in front of the rear plate portion 55c of the cover body 55, the third tilling tine 54 moves along the front surface of the rear plate portion 55c. Therefore, the soil S adhering to the rear plate portion 55c of the cover body 55 is scraped off and removed by the third tilling tine 54 and the soil removal member 56 attached to the holder 51b that holds the third tilling tine 54.

According to the tillage tine of this embodiment, the end of the hard alloy portion 54e of the third tillage tine 54 on the mounting base 54a side is located near an extension line of the direction in which the mounting base 54a extends.
As a result, when used as the third tillage tine 54 adjacent to the rear plate portion 55c of the cover body 55, it is possible to bring the hard alloy portion 54e into contact with the soil adhering to the rear plate portion 55c, thereby suppressing the occurrence of uneven wear in which the vertical blade portion 54b wears significantly more than the horizontal blade portion 54c, thereby extending the lifespan of the third tillage tine 54 and preventing a decrease in the tillage performance of the ridge spreader 1.

The hard alloy portion 54e of the third tillage tine 54 is provided on the surface opposite to the direction in which the horizontal blade portion 54c is curved relative to the vertical blade portion 54b.
This makes it possible to bring the hard alloy portion 54e of the third tillage tine 54 into contact with the soil adhering to the rear plate portion 55c of the cover body 55, thereby making it possible to further suppress uneven wear of the vertical blade portion 54b and the horizontal blade portion 54c.

The end portion on the ridge side of the hard alloy portion 54e of the third tillage tine 54 extends along the ridges of the vertical blade portion 54b and the horizontal blade portion 54c at a predetermined distance toward the blade edge from the ridges.
As a result, the wear on the sides of the vertical blade portion 54b and the horizontal blade portion 54c caused by removing soil adhering to the rear plate portion 55c of the cover body 55 is uniform across the vertical blade portion 54b and the horizontal blade portion 54c, thereby further extending the lifespan of the third tilling tine 54 and preventing a decrease in tilling performance.

Further, a bending start point P1, which is the boundary between the vertical blade portion 54b and the horizontal blade portion 54c of the blade edge, is the position furthest from the mounting base 54a in the direction in which the mounting base 54a extends.
As a result, when the tilling shaft 51 is rotated and the old ridge K is cut up by the third tilling tine 54, the soil of the old ridge K can be evenly brought into contact with the horizontal blade portion 54c, allowing the horizontal blade portion 54c to be worn evenly overall, thereby extending the lifespan of the third tilling tine 54 and preventing a decline in tilling performance.

In addition, the third tiller tine 54 is used in the pre-treatment section 50 of the ridge coating machine 1 .
As a result, the third tillage tines 54, which can extend the life of the tillage machine and prevent a decline in tillage performance, remove soil adhering to the rear plate portion 55c of the cover body 55 of the pre-treatment unit 50, thereby making it possible to reduce the costs required for maintaining and managing the ridge coating machine 1.

In addition, the third tilling tine 54 is provided with a soil removing member 56 for removing soil adhering to the rear surface inside the cover body 55 .
This makes it possible to prevent wear on the holder 51b to which the third tillage tine 54 is attached and around the mounting base 54a of the third tillage tine, thereby making it possible to further reduce the costs required for maintaining and managing the ridge coating machine 1.

In the above embodiment, the soil removal member 56 is attached to the holder 51b that holds the third tillage tine 54 at the same time as the third tillage tine 54, but this is not limited to the above. Even if the soil removal member 56 is not included and only the third tillage tine 54 is held by the holder 51b, the soil adhering to the rear plate portion 55c of the cover body 55 can be scraped off by the mounting plate 51a and the third tillage tine 54.

In addition, in the above embodiment, the soil removal member 56 covers the rotational direction side of the holder 51b that holds the mounting base 54a of the third tillage tine 54, and extends radially outward from the holder 51b to cover the rotational direction side of the periphery of the mounting base 54a of the third tillage tine 54 held by the holder 51b, but is not limited to this. For example, as shown in FIG. 8, the soil removal member 59 may cover the rotational direction side of the holder 51b that holds the mounting base 54a of the third tillage tine 54, and cover the rotational direction side of the periphery of the mounting base 54a and part of the vertical blade portion 54b of the third tillage tine 54 held by the holder 51b.

In addition, in the above embodiment, the soil removal member 56 covers the rotation direction side of the holder 51b that holds the third tilling tines 54, but it is also possible to remove soil S adhering to the rear plate portion 55c in the same manner as in the above embodiment by covering the side opposite the rotation direction with the soil removal member.

In addition, the soil removal member 56 may have various radial length dimensions for the tilling shaft 51, such as one that covers only the holder 51b or one that covers the entire third tilling tine 54.

1 Ridge coating machine 50 Pretreatment section 51 Cultivation shaft 51b Holder 54 Third cultivating claw 54a Mounting base 54b Vertical blade section 54c Horizontal blade section 54e Hard alloy section 55 Cover body 55c Rear plate section 56 Soil removal member 59 Soil removal member

Claims (4)

A tillage tine having an attachment base attached to a tillage shaft and a blade extending continuously from the attachment base,
A hard alloy portion having a higher hardness than other portions is provided on the cutting edge side of the cutting portion,
an end portion of the hard alloy portion on the side of the mounting base intersects with an extension line of the mounting base within a range of a width dimension of the mounting base,
A tillage tine, wherein the end portion on the ridge side of the hard alloy portion extends along the ridge at an approximately constant distance from the ridge of the blade portion toward the blade edge from the end portion on the mounting base side of the hard alloy portion to the end portion on the cutting tip side. The blade portion is curved to one side in the axial direction of the tilling shaft,
The tillage tine according to claim 1 , wherein the hard alloy portion is provided on a surface opposite to a direction in which the blade portion is curved. The tilling tines according to claim 1 or 2 are arranged adjacent to a cover body that covers the axial end of the tilling shaft. An agricultural machine equipped with a tilling tine according to any one of claims 1 to 3.