Tillers and agricultural implements

Abstract

To extend the life of tillage tines and prevent a decline in tillage performance. [Solution] The tillage tine according to the present disclosure is a tillage tine having an attachment base attached to a tillage shaft and a blade portion extending continuously from the attachment base, wherein a hard alloy portion having a higher hardness than other portions is provided on the cutting edge side of the blade portion, and the 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 cutting edge. 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.

Description

[Technical Field]

[0001] The present invention relates to a tillage tine that is attached to the tillage shaft of a ridge-spreading machine having a rotary tillage device used for tillage work, for example. [Background technology]

[0002] Conventionally, this type of tillage tine has been known to have an attachment base that is attached to the tillage shaft, a vertical blade portion that extends continuously from the attachment base, and a horizontal blade portion that extends continuously from the vertical blade portion, and is 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 is curved to one side of the rotational axis direction of the tillage shaft relative to the vertical blade portion (see, for example, Patent Document 1).

[0003] In the tillage tines, a hard alloy part that is harder than other parts is provided on the blade edge of the horizontal blade part that comes into contact with the tillage soil, and by having the hard alloy part come into contact with the tillage soil during tillage work, it is made less susceptible to wear and the durability of the rake face part that comes into most contact with the soil is improved.

[0004] A plurality of tillage tines are attached to the tillage shaft in the circumferential and axial directions. The upper and axial ends of the tillage shaft to which the plurality of tillage tines are attached are covered by a cover body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 05-91202 Summary of the Invention [Problem to be solved by the invention]

[0006] The tines adjacent to the cover body covering the axial end of the tillage shaft may come into contact with soil adhering to the inner surface of the cover body. Because the tines are primarily provided with hard alloy parts on the horizontal blades (rake faces), if the vertical blades continue to come into contact with soil adhering to the inner surface of the cover body, uneven wear occurs, with the vertical blades wearing out more than the horizontal blades. This means that the tines adjacent to the cover body covering the axial end of the tillage shaft must be replaced early to prevent damage and reduced tillage performance due to uneven wear.

[0007] An object of the present invention is to provide tillage tines that are less susceptible to uneven wear, thereby achieving a longer life and preventing a decline in tillage performance. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a tillage tine 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 tine being curved in the opposite direction to the rotation 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 rotation axis of the tillage shaft relative to the vertical blade portion, and a hard alloy portion having a higher 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 near 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 portion extending from the vertical blade portion to the horizontal blade portion, so 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. [Effects of the Invention]

[0009] According to the present invention, when used as a tillage tine adjacent to a cover body that covers the axial end of the tillage shaft, it is possible to bring the hard alloy part into contact with the soil adhering to the inner surface of the cover body, thereby suppressing the occurrence of uneven wear in which the vertical blade part wears out more than the horizontal blade part, thereby extending the lifespan and preventing a decline in the tillage performance of the rotary tillage device. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view of a ridge coating machine showing one embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] 1A is a side view of the pre-treatment unit with a part of the cover removed, and FIG. 1B is a front view of the pre-treatment unit with a part of the cover removed. [Figure 5] FIG. 10 is a front view of the third tillage tine. [Figure 6] FIG. 10 is a rear view of the third tillage tine. [Figure 7] 6 is a cross-sectional view taken along the line AA in FIG. 5. [Figure 8] (a) is a side view of the pre-treatment unit with part of the cover body removed, showing another example of the soil removal member, and (b) is a front view of the pre-treatment unit with part of the cover body removed, showing another example of the soil removal member. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1 to 7 show one embodiment of the present invention.

[0012] In this embodiment, a description will be given of a ridge coating machine 1 having a rotary tilling device to which the tilling tines of the present invention are attached.

[0013] This furrow coating machine 1 has a mounting unit 10 that is mounted on a running body T such as a tractor, an offset mechanism unit 20 that has one end connected to the mounting unit 10 and the other end that is 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.

[0014] The mounting section 10 has a hitch frame 11 extending in the width direction of the traveling machine body T. The hitch frame 11 is connected to a three-point linkage mechanism provided on the traveling machine body T via a connecting frame (not shown). An input shaft 12 to which power from the traveling machine body T is input is provided on the front side of the hitch frame 11.

[0015] 1, the offset mechanism 20 has an offset frame 21 whose front end is mounted horizontally rotatably in the center of the hitch frame 11 in the width direction, a link member 22 whose front end is mounted horizontally rotatably on one widthwise end side of the hitch frame 11, 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 by 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 that is mounted between the other widthwise end of the hitch frame 11 and the rear end of the offset frame 21.

[0016] A power transmission mechanism including a chain, sprockets, etc. is provided within the offset frame 21 for transmitting the power transmitted to the input shaft 12 to the working unit 30 side.

[0017] The working unit 30 has a top surface processing unit 40 for cutting down the upper parts of old ridges K formed along the periphery of the field, a pre-processing unit 50 for cutting down the lower parts of the old ridges K and piling up the cut soil, and a ridge leveling unit 60 for spreading the piled-up soil over the cut-up old ridges K, and is supported so as to be freely rotatable horizontally on the rear end of the offset mechanism unit 20. The working unit 30 rotates relative to the rear end of the offset mechanism unit 20 by driving a hydraulic rotary cylinder 34 provided between a member on the connecting member 23 side and a member on the working unit 30 side.

[0018] 3, the top field processing unit 40 has a rotary shaft 41 that rotates by power transmitted to the input shaft 12, and a plurality of tillage tines 42 attached at intervals in the circumferential direction to the outer periphery of the rotary shaft 41. The rotary shaft 41 is positioned so that, during ridge preparation work, the front end extends diagonally forward toward the outside of the field relative to the rear end.

[0019] As shown in Figure 3, the pre-treatment unit 50 includes a tillage shaft 51 that rotates by 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 axially 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 removes soil adhering to the rear surface inside the cover body 55.

[0020] As shown in Figure 1, the tillage shaft 51 is positioned so that its front end extends diagonally forward toward the outside of the field relative to its rear end during ridge preparation work. As shown in Figure 4, three mounting plates 51a for mounting the first to third tillage tines 52, 53, and 54, respectively, are provided on the outer periphery of the tillage shaft 51 at intervals in the axial direction.

[0021] Each mounting plate 51a is a polygonal plate-like member formed so that one dimension is larger than the other dimensions, and the center portion in the longitudinal direction is fixed to the tillage shaft 51. On both longitudinal sides of each mounting plate 51a, there is provided a holder 51b as a mounting portion for holding the mounting bases of the first to third tillage tines 52, 53, 54 described below.

[0022] Holder 51b is formed by bending both sides of a plate-shaped member in the width direction to form a U-shaped cross section and fixing the member to mounting plate 51a. Holder 51b is provided with insertion holes for inserting the mounting bases of first tillage tine 52, second tillage tine 53, and third tillage tine 54, and a mounting hole for inserting the shaft of bolt 57.

[0023] A first tillage tine 52 is attached to the mounting plate 51a located on the front side of the tillage shaft 51. A second tillage tine 53 is attached to the mounting plate 51a located second from the front of the tillage shaft 51. A third tillage tine 54 is attached to the mounting plate 51a located third from the front of the tillage shaft 51.

[0024] The first to third tillage 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.

[0025] The mounting bases 52a, 53a, 54a have a predetermined width and are formed to extend linearly toward the vertical blade portions 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. Insertion holes 52d, 53d, 54d for inserting the shank of a bolt 57 are provided in the widthwise center of the mounting bases 52a, 53a, 54a. 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 bolts 57 and nuts 58.

[0026] 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 to the horizontal blade portions 52c, 53c, 54c in the opposite direction to the rotational direction of the tillage shaft 51. Furthermore, 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.

[0027] Specifically, when the first and second tillage tines 52, 53 are attached to the tillage shaft 51, the horizontal blades 52c, 53c are curved toward the rear end of the tillage shaft 51 relative to the vertical blades 52b, 53b. Also, when the third tillage tine 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.

[0028] When the first to third tillage tines 52, 53, 54 are attached to the tillage shaft 51, the sides of the vertical blades 52b, 53b, 54b and horizontal blades 52c, 53c, 54c in the direction of rotation of the tillage shaft 51 become cutting edges, and the sides opposite the direction of rotation become ridges.

[0029] When the first to third tillage tines 52, 53, 54 are attached to the tillage shaft 51, the rotation radius R2 of the second tillage tine 53 is larger than the rotation radius R1 of the first tillage tine 52. Furthermore, when the first to third tillage tines 52, 53, 54 are attached to the tillage shaft 51, the rotation radius R3 of the third tillage tine 54 is larger than the rotation radius R2 of the second tillage tine 53.

[0030] A hard alloy portion 54e made of an alloy with a higher hardness than the other portions is provided on the blade edges of the vertical blade portion 54b and horizontal blade portion 54c of the third tillage tine 54. The hard alloy portion 54e is formed by welding a hard alloy to the surface on the opposite side of the curved direction of the horizontal blade portion 54c relative to the vertical blade portion 54b. The hard alloy portion 54e protrudes from the surface on the opposite side of the curved direction of the horizontal blade portion 54c relative to the vertical blade portion 54b.

[0031] The end of the hard alloy portion 54e on the mounting base 54a side is located near an extension of the mounting base 54a in the extension direction. Furthermore, the tip side end of the hard alloy portion 54e is located near the end of the side blade portion 54c. Here, when the third tillage tine 54 is attached to the tillage shaft 51, it is desirable that the end of the hard alloy portion 54e on the mounting base 54a side be located on an extension of the center of rotation of the tillage shaft 51 and the widthwise center of the insertion hole 54d in the mounting base 54a. However, it is also acceptable that the end of the hard alloy portion 54e intersects with an extension of the extension direction of the mounting base 54a within the range of the width dimension of the mounting base 54a.

[0032] The edge of the hard alloy portion 54e on the ridge side extends along the ridge of the vertical blade portion 54b and the horizontal blade portion 54c at a predetermined distance toward the cutting edge from the ridge.

[0033] 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 54a in the extension direction of the mounting base 54a.

[0034] 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 sides and bottoms 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 inside in the radial direction 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 inside in the radial direction of the tillage shaft 51. 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 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 that includes the tillage shaft 51 on the side opposite the old ridge K. The rear plate portion 55c is disposed at a distance of, for example, 10 mm from the hard alloy portion 54e provided on the vertical blade portion 54b of the third tillage tine 54.

[0035] The soil removal member 56 is formed by bending a plate-shaped member. The soil removal member 56 covers the rotational 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 side of the periphery of the mounting base 54a of the third tillage tine 54 held by the holder 51b. The width dimension of the soil removal member 56 is larger than the combined dimension of the mounting plate 51a and holder 51b and the thickness dimension of the vertical blade portion 54b of the third tillage tine 54. The soil removal member 56 is attached to the holder 51b together with the third tillage tine 54 by bolts 57 and nuts 58.

[0036] 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 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.

[0037] 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 offset to the side of the traveling position of the traveling body T to perform ridge coating work. The ridge coating machine 1 cuts up the upper part of the old ridge K using the top surface processing section 40, and cuts up the lower part and sides of the old ridge K using the pre-processing section 50. The ridge coating machine 1 supplies the soil of the old ridge K that has been cut up by the top surface processing section 40 and the pre-processing section 50 to the old ridge K side using the pre-processing section 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 section 50 to the surface of the old ridge K using the ridge preparation section 60.

[0038] In the pre-treatment 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 tillage tines 52, 53, 54 is guided by the cover body 55 and supplied to the old ridge K 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, some 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 the soil may adhere to the rear plate portion 55c of the cover body 55.

[0039] At this time, the third tillage tines 54 are moving along the front surface of the rear plate 55c in front of the rear plate 55c of the cover body 55. Therefore, the soil S adhering to the rear plate 55c of the cover body 55 is scraped off and removed by the third tillage tines 54 and the soil removing members 56 attached to the holders 51b that hold the third tillage tines 54.

[0040] According to the tillage tines 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 of the mounting base 54a. 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 out significantly compared to the horizontal blade portion 54c, thereby extending the lifespan of the third tillage tine 54 and preventing a decline in the tillage performance of the furrow coating machine 1.

[0041] 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.

[0042] Furthermore, the edge of the hard alloy portion 54e of the third tillage tine 54 on the ridge side extends along the ridge of the vertical blade portion 54b and the horizontal blade portion 54c at a predetermined distance toward the blade edge from the ridge. This means that 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 tillage tine 54 and preventing a decline in tillage performance.

[0043] Furthermore, 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 54a in the direction in which the mounting base 54a extends. This makes it possible for the soil of the old ridge K to come into even contact with the horizontal blade portion 54c when the tilling shaft 51 is rotated and the third tilling tine 54 is used to cut up the old ridge K, 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.

[0044] The third tiller tines 54 are used in the pre-treatment section 50 of the ridge coating machine 1. This allows the third tillage tines 54, which can extend the lifespan and prevent a decline in tillage performance, to remove soil adhering to the rear plate portion 55c of the cover body 55 of the pre-treatment section 50, thereby making it possible to reduce the costs required for maintaining and managing the ridge coating machine 1.

[0045] The third tillage tines 54 are provided with soil removing members 56 for removing soil adhering to the rear surface inside the cover body 55. This prevents wear on the holder 51b to which the third tillage tine 54 is attached and on the area 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.

[0046] In the above embodiment, the soil removal members 56 are attached to the holder 51b that holds the third tillage tines 54 at the same time as the third tillage tines 54, but this is not limited to this. Even if the soil removal members 56 are not provided and only the third tillage tines 54 are held by the holder 51b, 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 tines 54.

[0047] In the above embodiment, the soil removal member 56 covers the rotational 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 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 side of the holder 51b that holds the mounting base 54a of the third tillage tine 54 and cover the rotational side of the periphery of the mounting base 54a and part of the vertical blade 54b of the third tillage tine 54 held by the holder 51b.

[0048] In addition, in the above embodiment, the soil removal member 56 is shown to cover the rotational direction side of the holder 51b that holds the third tillage tine 54, but even if the soil removal member covers the side opposite to the rotational direction, it is possible to remove soil S adhering to the rear plate portion 55c in the same way as in the above embodiment.

[0049] In addition, the soil removal member 56 may have various length dimensions in the radial direction of the tillage shaft 51, such as one that covers only the holder 51b or one that covers the entire third tillage tine 54. [Explanation of symbols]

[0050] 1 Ridge coating machine 50 Pretreatment section 51 Cultivation axis 51b Holder 54 3rd Cultivating Claw 54a Mounting base 54b Vertical blade part 54c Horizontal blade part 54e Hard alloy part 55 Cover body 55c Rear plate part 56 Soil removal member 59 Soil removal member

Claims

1. A tillage tine arranged adjacent to a cover body covering the axial end of a tillage shaft, the tillage tine having an attachment base attached to the tillage shaft, a vertical blade portion extending continuously from the attachment base, and a horizontal blade portion extending continuously from the vertical blade portion, The horizontal blade portion is curved to one side in the axial direction of the tillage shaft relative to the vertical blade portion, a hard alloy portion having a higher hardness than other portions is provided on the cutting edge side of the vertical blade portion and the horizontal blade portion on the opposite side to the direction in which the horizontal blade portion is curved, The edge of the hard alloy portion on the ridge side extends from the edge of the hard alloy portion on the attachment base side to the edge of the cutting edge side, along the ridge of the vertical blade portion and the horizontal blade portion at a substantially constant distance from the ridge toward the cutting edge, A tillage tine, wherein the end of the hard alloy portion on the mounting base side intersects with an extension line of the mounting base in the extension direction within the range of the width dimension of the mounting base.

2. The tilling shaft is provided with a mounting plate for attaching the tilling tines, The tillage tines according to claim 1 , wherein the tillage tines are attached to a surface of the mounting plate opposite to a side on which the cover body is located.

3. A tillage tine as described in claim 1 or 2, wherein the intersection of the boundary line between the vertical blade portion and the horizontal blade portion and the blade edge is farthest from the mounting base in the direction in which the mounting base extends.

4. An agricultural machine comprising the tiller tines according to any one of claims 1 to 3.

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