JP7114116B2 - Tillage tines, ridge coating machines and agricultural machines - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tillage tine attached to a tillage shaft of a ridge coating machine having a rotary tillage device used for tillage work, for example.

Conventionally, this type of tillage tine has a mounting base attached to a tillage shaft, a vertical blade extending continuously from the mounting base, and a horizontal blade extending continuously from the vertical blade. The blade is curved in a direction opposite to the rotation direction of the tillage shaft from the vertical blade portion to the horizontal blade portion, and the horizontal blade portion is curved in one direction of the rotation axis of the tillage shaft with respect to the vertical blade portion. is known (see, for example, Patent Document 1).

In the tillage tine, a hard alloy portion having a higher hardness than other portions is provided on the blade edge portion of the horizontal blade portion that contacts cultivated soil. I am trying to improve the durability of the rake face part that comes into contact with the most.

A plurality of tillage tines are attached to the tillage shaft in the circumferential and axial directions. Moreover, the upper part and the axial end part of the tillage shaft to which the plurality of tillage tines are attached are covered with a cover body.

Japanese Utility Model Laid-Open No. 05-91202

The tillage tines adjacent to the cover body covering the axial ends of the tillage shaft may come into contact with the soil adhering to the inner surface of the cover body. Since the tillage tine is mainly provided with a hard alloy portion in the horizontal blade portion (rake face portion), if the vertical blade portion continues to contact the soil adhering to the inner surface of the cover body, the vertical blade portion will be more vertical than the horizontal blade portion. Uneven wear occurs in which the blade is greatly worn. As a result, the tillage tines adjacent to the cover body that covers the axial ends of the tillage shafts need to be replaced early in order to prevent damage and deterioration of tillage performance due to uneven wear.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tillage tine that is capable of extending the life of the tine and preventing the deterioration of the tillage performance by making uneven wear less likely to occur.

In order to achieve the above object, the present invention has a mounting base attached to a tillage shaft, a vertical blade extending continuously from the mounting base, and a horizontal blade extending continuously from the vertical blade. Then, from the vertical blade portion to the horizontal blade portion, it is curved in a direction opposite to the rotation direction of the tillage shaft, and the horizontal blade portion is curved in one direction of the rotation axis of the tillage shaft with respect to the vertical blade portion. A tilling tine having a curved shape, wherein a hard alloy portion having a higher hardness than other portions is provided from the vertical blade portion to the horizontal blade portion on the blade edge side of the vertical blade portion and the horizontal blade portion, The end of the hard metal portion on the side of the mounting base is positioned in the vicinity of an extension line in the direction in which the mounting base extends.
As a result, since the hard alloy portion is located at the blade edge portion extending from the vertical blade portion to the horizontal blade portion, when used as a tillage claw adjacent to the cover body covering the axial end portion of the tillage shaft, the cover body The hard alloy portion comes into contact with the soil adhering to the inner surface.

According to the present invention, when used as a tillage tine adjacent to the cover body covering the axial end of the tillage shaft, the hard metal part can be brought into contact with the soil adhering to the inner surface of the cover body. Therefore, it is possible to suppress uneven wear in which the vertical blade portion wears more than the horizontal blade portion, thereby extending the life of the rotary tillage device and preventing the tillage performance of the rotary tillage device from deteriorating.

1 is a plan view of a ridge coating machine showing an embodiment of the present invention; FIG. It is a left side view of a ridge coating machine. It is a front view of a ridge coating machine. (a) is a side view of the preprocessing section with a part of the cover removed, and (b) is a front view of the preprocessing section with a part of the cover removed. It is a front view of a 3rd tillage nail. It is a rear view of a 3rd tillage nail. FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5; (a) is a side view of the pretreatment unit with a part of the cover body showing another example of the soil removing member removed, and (b) is a part of the cover body showing another example of the soil removing member. FIG. 2 is a front view of the pretreatment section with the .

1 to 7 show one embodiment of the present invention.

In this embodiment, a ridge coating machine 1 having a rotary tillage device to which the tillage tines of the present invention are attached will be described.

The ridge coating machine 1 includes a mounting portion 10 mounted on a traveling body T such as a tractor, and an offset mechanism having one end connected to the mounting portion 10 and the other end movable in the width direction with respect to the mounting portion 10. It has a portion 20 and a working portion 30 connected to the other end of the offset mechanism portion 20 .

The mounting portion 10 has a hitch frame 11 extending in the width direction of the traveling body T. As shown in FIG. The hitch frame 11 is connected to a three-point link connection mechanism provided on the traveling body T via a connection 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 unit 20 includes an offset frame 21 whose front end is horizontally rotatably provided at the center of the hitch frame 11 in the width direction, and an offset frame 21 whose front end is at one end of the hitch frame 11 in the width direction. and a connecting member 23 connecting the rear end portion of the offset frame 21 and the rear end portion of the link member 22 . The offset mechanism portion 20 has a parallel link mechanism composed of 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 widthwise end of the hitch frame 11 and the rear end of the offset frame 21 .

In the offset frame 21, a power transmission mechanism including chains, sprockets, etc. is provided for transmitting the power transmitted to the input shaft 12 to the working portion 30 side.

The work part 30 includes a top processing part 40 for cutting down the upper part of the old ridge K formed along the periphery of the field, and a pretreatment part 40 for cutting down the lower part of the old ridge K and performing earth mounding with the cut down soil. It has a part 50 and a levee trimming part 60 for applying the heaped soil onto the cut-down old ridge K, and is horizontally rotatably supported on the rear end side of the offset mechanism part 20. . The working part 30 rotates with respect to the rear end side of the offset mechanism part 20 by driving a hydraulic rotating cylinder 34 provided between a member on the side of the connecting member 23 and a member on the side of the working part 30 .

As shown in FIG. 3, the top processing unit 40 includes a rotating shaft 41 that rotates by power transmitted to the input shaft 12, and a plurality of rotating shafts 41 attached to the outer peripheral side of the rotating shaft 41 at intervals in the circumferential direction. It has tillage tines 42 . The rotary shaft 41 is arranged so that the front end side extends obliquely forward toward the outside of the field with respect to the rear end side during the ridge trimming work.

As shown in FIG. 3 , the pretreatment unit 50 is attached to a tillage shaft 51 that rotates by power transmitted to the input shaft 12 , and to the outer peripheral side of the tillage shaft 51 at intervals in the circumferential direction. A plurality of first tillage tines 52, second tillage tines 53 and third tillage tines 54 arranged in the axial direction of 51, and predetermined portions of the first to third tillage tines 52, 53, 54 are covered from the outside. It has a cover body 55 and a soil removing member 56 provided on the third tillage tine 54 for removing soil adhering to the rear surface of the cover body 55 .

As shown in FIG. 1 , the tillage shaft 51 is arranged so that the front end extends obliquely forward toward the outside of the field with respect to the rear end during the ridge trimming operation. As shown in FIG. 4, three mounting plates 51a for mounting the first to third tillage tines 52, 53 and 54 are provided on the outer periphery of the tillage shaft 51 at intervals in the axial direction. It is

Each mounting plate 51a is a polygonal plate-shaped member formed larger in one direction than in the other direction, and is fixed to the tillage shaft 51 at the central portion in the longitudinal direction. Holders 51b serving as mounting portions for holding mounting bases of first to third tillage tines 52, 53, and 54, which will be described later, are provided on both sides in the longitudinal direction of each mounting plate 51a.

The holder 51b is formed by fixing a member, which is formed to have a U-shaped cross section by bending both sides in the width direction of a plate-like member, to the mounting plate 51a. The holder 51b is provided with insertion holes for inserting the mounting bases of the first tillage tines 52, the second tillage tines 53 and the third tillage tines 54, and mounting holes for inserting the shafts of the bolts 57. there is

A first tillage tine 52 is attached to the mounting plate 51a positioned on the front side of the tillage shaft 51 . A second tillage tine 53 is attached to the mounting plate 51a positioned second from the front side of the tillage shaft 51 . Further, a third tillage claw 54 is attached to the mounting plate 51a located third from the front side of the tillage shaft 51. As shown in FIG.

The first to third tillage tines 52, 53, 54 include mounting bases 52a, 53a, 54a attached to the holder 51b, vertical blades 52b, 53b, 54b extending continuously from the mounting bases 52a, 53a, 54a, Horizontal blade portions 52c, 53c and 54c continuously extending from the vertical blade portions 52b, 53b and 54b.

The mounting bases 52a, 53a, 54a have a predetermined width and are formed to extend linearly toward the vertical blades 52b, 53b, 54b. The mounting bases 52 a , 53 a , 54 a of the first to third tillage tines 52 , 53 , 54 face radially outward of the tillage shaft 51 when attached to the tillage shaft 51 . Insertion holes 52d, 53d, and 54d for inserting the shaft portions of the bolts 57 are provided in the widthwise central portions of the mounting base portions 52a, 53a, and 54a. The first to third tillage tines 52, 53, 54 are attached to the holder 51b by inserting the attachment bases 52a, 53a, 54a into the insertion holes of the holder 51b and tightening them with bolts 57 and nuts 58.

When the first to third tillage tines 52, 53, and 54 are attached to the tillage shaft 51, the tillage shaft 51 rotates from the vertical blade portions 52b, 53b, and 54b toward the horizontal blade portions 52c, 53c, and 54c. It has a shape that curves in the direction opposite to the direction. In addition, when the first to third tillage tines 52, 53, and 54 are attached to the tillage shaft 51, the horizontal blade portions 52c, 53c, and 54c are located on the tillage shaft 51 with respect to the vertical blade portions 52b, 53b, and 54b. It is curved in the axial direction.

Specifically, when the first and second tillage tines 52 and 53 are attached to the tillage shaft 51, the horizontal blade portions 52c and 53c are located on the rear end side of the tillage shaft 51 with respect to the vertical blade portions 52b and 53b. is curved. Further, when the third tillage tine 54 is attached to the tillage shaft 51, the horizontal blade portion 54c is curved toward the front end side of the tillage shaft 51 with respect to the vertical blade portion 54b.

When the first to third tillage tines 52, 53, and 54 are attached to the tillage shaft 51, the vertical blade portions 52b, 53b, and 54b and the horizontal blade portions 52c, 53c, and 54c are positioned on the rotation direction side of the tillage shaft 51. It becomes an edge, and the opposite side of the rotation direction becomes a ridge.

When the first to third tillage tines 52 , 53 , 54 are attached to the tillage shaft 51 , the rotation radius R 2 of the second tillage tine 53 is larger than the rotation radius R 1 of the first tillage tine 52 . Further, when the first to third tillage tines 52 , 53 , 54 are attached to the tillage shaft 51 , the rotation radius R 3 of the third tillage tine 54 is larger than the rotation radius R 2 of the second tillage tine 53 .

At the edge of the vertical blade portion 54b and the horizontal blade portion 54c of the third tillage tine 54, a hard alloy portion 54e made of an alloy having a hardness higher than that of other portions is formed from the vertical blade portion 54b to the horizontal blade portion 54c. is provided. The hard alloy portion 54e is formed by depositing a hard alloy on the surface of the vertical blade portion 54b opposite to the curved direction of the horizontal blade portion 54c. The hard alloy portion 54e protrudes from the surface opposite to the direction in which the horizontal blade portion 54c curves with respect to the vertical blade portion 54b.

An end portion of the hard alloy portion 54e on the side of the mounting base portion 54a is positioned in the vicinity of an extension line in the direction in which the mounting base portion 54a extends. In addition, the cutting edge side end of the hard alloy portion 54e is positioned in the vicinity of the end of the side edge portion 54c. Here, in a state where the third tillage tines 54 are attached to the tillage shaft 51, the end portion of the hard metal portion 54e on the side of the attachment base portion 54a is aligned with the rotation center of the tillage shaft 51 and the width direction of the insertion hole 54d of the attachment base portion 54a. Although it is desirable that the end of the hard alloy portion 54e is positioned on the extension line of the central portion, the end of the hard alloy portion 54e intersects with the extension line in the direction in which the mounting base 54a extends within the range of the width dimension of the mounting base 54a. It can be to some extent.

In addition, the edge of the hard alloy portion 54e on the crest side extends along the crest from the crest of the vertical blade portion 54b and the lateral blade portion 54c at a predetermined distance toward the blade edge.

A bending start point P1, which is a boundary between the vertical blade portion 54b and the horizontal blade portion 54c and is an intersection point between the blade edge and a bending start line LS at which bending of the horizontal blade portion 54c is started with respect to the vertical blade portion 54b, is , the distance D that is the farthest from the proximal end of the mounting base 54a in the direction in which the mounting base 54a extends.

The cover body 55 includes an outer peripheral plate portion 55a that covers the outer peripheral portions of the first to third tillage tines 52, 53, and 54 excluding the side portions and lower portions on the old ridge K side, and the tillage shaft 51 extending from the front end portion of the outer peripheral plate portion 55a. and a rear plate portion 55c extending radially inward of the tillage shaft 51 from the rear end portion of the outer peripheral plate portion 55a. The front plate portion 55b covers only the outer peripheral sides of the first to third tillage tines 52, 53, 54 along the front end portion of the outer peripheral plate portion 55a. Further, the rear plate portion 55c covers the portion of the first to third tillage tines 52, 53, 54 that includes the tillage shaft 51 on the side opposite to the old ridge K. The rear plate portion 55c is arranged at an interval of, for example, 10 mm from the hard alloy portion 54e provided on the vertical blade portion 54b of the third tillage tine 54. As shown in FIG.

The soil removing member 56 is formed by bending a plate-like member. The soil removing member 56 covers the rotation direction side of the holder 51b that holds the mounting base portion 54a of the third tillage tine 54, and extends radially outward of the tillage shaft 51 from the holder 51b, whereby the third tillage held by the holder 51b. 3 It covers the rotation direction side around the attachment base portion 54a of the tillage tine 54 . The soil removing member 56 is formed so that its width dimension is larger than the combined dimension of the mounting plate 51 a and the holder 51 b and the thickness dimension of the vertical blade portion 54 b of the third tillage tine 54 . The soil removing member 56 is attached to the holder 51 b together with the third tillage tines 54 by bolts 57 and nuts 58 .

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

The ridge coating machine 1 configured as described above is mounted on the traveling body T, and moves with the traveling body T to a position shifted laterally with respect to the traveling position of the traveling body T to perform the ridge coating work. The ridge coating machine 1 cuts down the upper part of the old ridge K by the top processing part 40, and cuts down the lower part and the side surface of the old ridge K by the pre-processing part 50. - 特許庁The ridge coating machine 1 supplies the soil of the old ridge K cut down by the top processing unit 40 and the preprocessing unit 50 to the side of the old ridge K by the preprocessing unit 50 . The ridge coating machine 1 forms a new ridge by coating the surface of the old ridge K with the soil supplied to the side of the old ridge K by the pretreatment part 50 by the ridge trimming part 60.例文帳に追加

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

At this time, in front of the rear plate portion 55c of the cover body 55, the third tillage claw 54 is moving 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 tillage tines 54 and the soil removing member 56 attached to the holder 51b holding the third tillage tines 54 .

According to the tillage tine of the present embodiment, the end of the hard metal portion 54e of the third tillage tine 54 on the side of the attachment base 54a is positioned near the extension line in the direction in which the attachment 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, the hard alloy portion 54e can be brought into contact with the soil adhering to the rear plate portion 55c. It is possible to suppress the occurrence of uneven wear in which the vertical blade portion 54b wears more than the horizontal blade portion 54c, thereby extending the life of the third tillage tine 54 and preventing the deterioration of the tillage performance of the ridge coating machine 1. It becomes possible.

Further, 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 curves with respect to the vertical blade portion 54b.
As a result, the hard alloy portion 54e of the third tillage tine 54 can be brought into contact with the soil adhering to the rear plate portion 55c of the cover body 55, so that the vertical blade portion 54b and the horizontal blade portion 54c are unevenly worn. can be further suppressed.

Further, the peak-side end of the hard metal portion 54e of the third tillage tine 54 extends from the peaks of the vertical blade portion 54b and the horizontal blade portion 54c along the blade edge side at a predetermined distance.
As a result, the wear of the side surfaces of the vertical blade portion 54b and the horizontal blade portion 54c caused by removing the soil adhering to the rear plate portion 55c of the cover body 55 is uniform over the vertical blade portion 54b and the horizontal blade portion 54c. Therefore, it is possible to further lengthen the life of the third tillage tines 54 and prevent the deterioration of the tillage performance.

Further, the 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 farthest position from the mounting base portion 54a in the extending direction of the mounting base portion 54a.
As a result, when the tillage shaft 51 is rotated to cut down the old ridge K with the third tillage tines 54, the soil of the old ridge K can be evenly brought into contact with the horizontal blade portion 54c. Further, it is possible to extend the life of the third tillage tines 54 and prevent the deterioration of the tillage performance.

Also, the third tillage tine 54 is used in the pretreatment section 50 of the ridge coating machine 1 .
As a result, soil adhering to the rear plate portion 55c of the cover body 55 of the pretreatment unit 50 is removed by the third tillage tines 54, which can extend the service life and prevent the deterioration of the tillage performance. It becomes possible to reduce the cost required for maintenance of the coating machine 1 .

Further, the third tillage tine 54 is provided with a soil removing member 56 for removing soil adhering to the rear surface inside the cover body 55 .
As a result, wear of the holder 51b to which the third tillage tine 54 is attached and the vicinity of the attachment base 54a of the third tillage tine can be prevented, so that the cost required for maintenance of the ridge coating machine 1 can be further reduced. It becomes possible.

In the above-described embodiment, the holder 51b holding the third tillage tines 54 is attached with the soil removing member 56 at the same time as the third tillage tines 54, but the present invention is not limited to this. Even if the soil removing member 56 is not provided and only the third tillage tines 54 are held by the holder 51b, the soil adhering to the rear plate portion 55c of the cover body 55 is removed by the mounting plate 51a and the third tillage tines. It can be scraped off by claws 54 .

In the above-described embodiment, 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 of the tillage shaft 51 from the holder 51b. Although the rotation direction side around the mounting base portion 54a of the third tillage tine 54 held by the holder 51b is covered, it is not limited to this. For example, as shown in FIG. 8, the soil removing member 59 covers the rotation direction side of the holder 51b that holds the mounting base 54a of the third tillage tine 54, and the mounting of the third tillage tine 54 held by the holder 51b. You may make it cover the rotation direction side of the circumference|surroundings of a part of base 54a and the vertical blade part 54b.

In the above-described embodiment, the soil removing member 56 covers the rotation direction side of the holder 51b holding the third tillage tine 54, but the soil removal member covers the opposite side to the rotation direction. However, it is possible to remove the soil S adhering to the rear plate portion 55c in the same manner as in the above-described embodiment.

In addition, as the soil removing member 56, various radial length dimensions of the tillage shaft 51 are conceivable, such as one that covers only the holder 51b, one that covers the entire third tillage tines 54, and the like.

1 Ridge coating machine 50 Pretreatment unit 51 Tillage shaft 51b Holder 54 Third tillage claw 54a Mounting base 54b Vertical blade 54c Horizontal blade 54e Hard alloy portion 55 Cover body 55c Rear plate portion 56 Soil removing member 59 Soil removing member

Claims (8)

A tillage tine having a mounting base attached to a tillage shaft and a blade extending continuously from the mounting base,
A hard alloy portion having higher hardness than other portions is provided on the blade edge side of the blade portion,
The tillage tine, wherein the end portion of the hard alloy portion on the side of the mounting base is positioned substantially at the same position as one of the sharpening end portions of the blade portion. 2. The tillage nail according to claim 1, wherein the end portion of the hard metal portion opposite to the mounting base portion is positioned between the other of the sharpening end portions of the blade portion and the cutting edge of the blade portion. . The blade portion is curved in one axial direction of the tillage shaft,
The tillage tine according to claim 1 or 2, wherein the hard alloy portion is provided on a surface opposite to a direction in which the blade portion curves. The tillage tine according to any one of claims 1 to 3, wherein the hard alloy portion is provided on a surface of the blade portion opposite to the blade attachment side surface. A ridge coating machine comprising the tillage tine according to any one of claims 1 to 4 in a pretreatment section that cuts down an old ridge and fills it with soil. 6. The ridge coating machine according to claim 5, wherein said tillage tine having said blade portion curved in a direction opposite to said rear plate portion is provided at a position adjacent to said rear plate portion of said cover body of said pretreatment portion. A plurality of tillage tines are arranged on the tillage shaft,
The furrow coating machine according to claim 6, wherein the tillage tine adjacent to the rear plate portion has the largest rotation radius among the plurality of tines. An agricultural work machine comprising a rotary tillage device provided with the tillage tines according to any one of claims 1 to 4.

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