Tillage tine and agricultural implement

Abstract

To extend a service life of a tillage tine and prevent reduction of cultivation performance.SOLUTION: A tillage tine of the present disclosure is a tillage tine comprising: a fitting base part fitted to a cultivation shaft; and a blade part extending continuously from the fitting base part. On a blade edge side of the blade part, there is provided a hard alloy part whose hardness is higher than that of other parts. An end part of the hard alloy part on the fitting base part side crosses an extension line in a direction where the fitting base part extends in a range of a width dimension of the fitting base part, and an end part of the hard alloy part on a ridge side extends along the ridge, at a substantially constant distance from a ridge of the blade part to the blade edge side. The blade part may be curved in one side of an axial direction of the cultivation shaft, and the hard alloy part may be provided on a surface opposite to a side where the blade part is curved.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Conventionally, a tillage claw of this type has been known which has a mounting base that is 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, and which 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 in the direction of the rotational axis of the tillage shaft relative to the vertical blade portion (see, for example, Patent Document 1).

[0003] In the tilling 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 soil, and by bringing the hard alloy part into contact with the soil during tilling 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 tilling tines are attached to the tilling shaft in the circumferential and axial directions. The upper portion and the axial end portion of the tilling shaft to which the plurality of tilling 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 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 need to be replaced early to prevent damage and deterioration of tillage performance due to uneven wear.

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

[0008] 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. Effect of the Invention

[0009] According to the present invention, when used as a tillage tine adjacent to a cover body covering 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 more than the horizontal blade part, thereby extending the lifespan and preventing a decrease in the tillage performance of the rotary tillage device. [Brief description of the drawings]

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

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

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

[0013] This ridge 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 having 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 connected to the other end of the offset mechanism unit 20.

[0014] The mounting unit 10 has a hitch frame 11 extending in the width direction of the traveling body T. 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.

[0015] 1, the offset mechanism 20 has an offset frame 21 whose front end is provided in the center of the hitch frame 11 in the width direction so as to be freely rotatable in the horizontal direction, a link member 22 whose front end is provided in one end side of the hitch frame 11 in the width direction so as to be freely rotatable in the horizontal 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 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 provided between the other end side of the hitch frame 11 in the width direction and the rear end side of the offset frame 21.

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

[0017] The working unit 30 has a top surface 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 on the rear end of the offset mechanism unit 20 so as to be freely rotatable in the horizontal direction. The working unit 30 is The offset mechanism 20 is rotated relative to the rear end thereof 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 rotating shaft 41 that rotates by the power transmitted to the input shaft 12, and a plurality of tilling tines 42 that are attached at intervals in the circumferential direction to the outer periphery of the rotating shaft 41. The rotating shaft 41 is arranged so that, during ridge preparation work, the front end side extends diagonally forward toward the outside of the field relative to the rear end side.

[0019] As shown in Figure 3, the pre-treatment unit 50 has 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 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 for removing soil adhering to the rear surface within the cover body 55.

[0020] As shown in Fig. 1, the tilling shaft 51 is disposed such that, during ridge preparation work, the front end side extends diagonally forward toward the outside of the field relative to the rear end side. As shown in Fig. 4, three mounting plates 51a for mounting the first to third tilling tines 52, 53, and 54, respectively, are provided on the outer periphery of the tilling 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 first to third tillage tines 52, 53, 54 described below.

[0022] The 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 the mounting plate 51a. The holder 51b is provided with insertion holes for inserting the mounting bases of the first tillage tine 52, the second tillage tine 53, and the third tillage tine 54, and a mounting hole for inserting the shaft of the bolt 57.

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

[0024] The first to third tillage tines 52, 53, 54 have mounting bases 52a, 53a, 54a attached to the holder 51b, vertical blade portions 52b, 53b, 54b extending continuously from the mounting bases 52a, 53a, 54a, and horizontal blade portions 52c, 53c, 54c extending continuously from the vertical blade portions 52b, 53b, 54b.

[0025] 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 of the tillage shaft 51. The mounting bases 52a, 53a, 54a are provided at the widthwise center thereof with insertion holes 52d, 53d, 54d for inserting the shafts of the bolts 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 bolts 57 and nuts 58.

[0026] The first to third tilling tines 52, 53, and 54 are vertically aligned when attached to the tilling shaft 51. The blades 52b, 53b, 54b are curved toward the horizontal blades 52c, 53c, 54c in the opposite direction to the rotational direction of the tillage shaft 51. When the first to third tillage tines 52, 53, 54 are attached to the tillage shaft 51, the horizontal blades 52c, 53c, 54c are curved in the axial direction of the tillage shaft 51 relative to the vertical blades 52b, 53b, 54b.

[0027] Specifically, when the first and second tillage claws 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 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.

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

[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. Also, 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] The blade edges of the vertical blade portion 54b and the horizontal blade portion 54c of the third tillage tine 54 are provided with a hard alloy portion 54e made of an alloy having a higher hardness 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.

[0031] 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. Also, the tip side end of the hard alloy part 54e is located near the end of the side blade part 54c. Here, it is preferable that the end of the hard alloy part 54e on the mounting base 54a side is located on the extension line of the rotation center of the tillage shaft 51 and the width direction center of the insertion hole 54d of the mounting base 54a when the third tillage claw 54 is attached to the tillage shaft 51, 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.

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

[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 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 radially inner side 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 radially inner side 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 opposite side to 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 removing member 56 is formed by bending a plate-shaped member. The 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 removal member 56 is formed so 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 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 which 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 shifted laterally from 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 treatment section 40, and cuts down the lower part and sides of the old ridge K with the pre-treatment section 50. The ridge coating machine 1 supplies the soil of the old ridge K cut up by the top surface treatment section 40 and the pre-treatment section 50 to the old ridge K side with the pre-treatment 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-treatment section 50 to the surface of the old ridge K with 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 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.

[0039] At this time, the third tilling tine 54 moves along the front surface of the rear plate portion 55c in front of the rear plate portion 55c of the cover body 55. 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 removing member 56 attached to the holder 51b that holds the third tilling tine 54.

[0040] According to the tillage tine of the present 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.

[0041] The hard alloy portion 54e of the third tillage tine 54 is provided on a 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] Further, the end portion on the ridge side of the hard alloy portion 54e of the third tillage tine 54 extends along the ridge at a predetermined distance toward the blade edge from the ridges of the vertical blade portion 54b and the horizontal blade portion 54c. 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 life of the third tilling tine 54 and preventing a decrease in tilling performance. It becomes possible.

[0043] 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 side blade portion 54c, allowing the side 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] 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 soil adhering to the rear plate portion 55c of the cover body 55 of the pre-treatment unit 50 is removed by the third tillage tine 54, which can extend the life of the tillage machine and prevent a decline in tillage performance, thereby making it possible to reduce the costs required for maintaining and managing the ridge coating machine 1.

[0045] Further, 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 the ridge coating machine 1.

[0046] In the above embodiment, the soil removing 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 this. Even if the soil removing member 56 is not provided and only the third tillage tine 54 is 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 tine 54.

[0047] In the above 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 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, but is not limited thereto. For example, as shown in FIG. 8, the soil removing member 59 may cover the rotation direction side of the holder 51b that holds the mounting base 54a of the third tillage tine 54, and cover the rotation direction 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 covering the rotational direction side of the holder 51b that holds the third tillage tine 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 rotational direction with a soil removal member.

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

[0050] 1 Ridge painting 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 material 59 Soil removal materials

Claims

1. A tillage tine having an attachment base attached to a tillage shaft and a blade portion 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 the range of the width dimension of the mounting base, A tillage tine in which the ridge-side end of the hard alloy portion extends along the ridge at an approximately constant distance from the ridge of the cutting portion toward the blade edge, from the end of the hard alloy portion on the mounting base side to the end on the cutting tip side.

2. The blade portion is curved to one side in the axial direction of the tillage 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 cutting edge is curved.

3. A holder having an insertion hole is fixed to the tillage shaft, The tillage tine according to claim 1 or 2, wherein the mounting base is inserted into the insertion hole and attached to the tillage shaft.

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

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