JP6745208B2 - Tillage nail - Google Patents

Description

The present invention relates to a tilling claw used by being attached to a rotary shaft of an agricultural work machine.

Conventionally, for example, a tilling claw described in Patent Document 1 below is known.

This conventional tillage claw has a mounting base portion that is attached to a rotary shaft (cultivating shaft) of an agricultural working machine, a vertical blade portion that is connected to the end portion on the tip side of this mounting base portion, and a tip side of this vertical blade portion. A horizontal blade portion continuously provided to the end portion, the vertical blade portion forms an arcuate confounding blade edge so as to gradually distance from the starting end to the terminal end in the rotational direction, the horizontal blade portion, Bends sideways from the vertical blade part at an angle close to a right angle, and makes the blade edge a converging blade edge that is continuous with the blade edge of the vertical blade part, and also curves the entire horizontal blade part smoothly in the rotation direction. A rake face is formed.

JP-A-63-160501

However, the above-mentioned conventional tillage claws have a problem that the soil is likely to be caught during the tillage work and the required power increases.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a tilling claw capable of reducing required power.

Tilling claws 請 Motomeko 1 described, a mounting base that is attached to a rotating shaft of the agricultural machine, and a vertical blade portion provided continuously at an end portion of the distal end side of the mounting base, the end of the distal end side of the Tateha portion And a horizontal blade portion continuously provided to the portion, the horizontal blade portion is curved from the vertical blade portion in the direction opposite to the rotation direction side, and the horizontal blade portion is a plowing claw curved to the surface side which is one side. The vertical blade portion and the horizontal blade portion have a main body plate portion and a bladed portion continuous with the main body plate portion. Of the bladed portions, one side in the longitudinal direction and the other in the longitudinal direction. The portion located on the end side is a front surface that is flush with the front surface of the main body plate section in a cross-sectional view, and a back side that is inclined with respect to the back surface of the main body plate section in a cross-sectional view. An inclined surface, of the bladed portion, the portion located in the longitudinal direction intermediate portion has a front side inclined surface located in an inclined surface shape with respect to the surface of the main body plate portion in a cross-sectional view, at least one of the Tateha portion and the lateral edge portions are those having a curved bend toward the rear side in the rotational direction front side.

A tillage claw according to a second aspect of the present invention is the tillage claw according to the first aspect, wherein the bent portion is formed over both the vertical blade portion and the horizontal blade portion.

A third aspect of the invention is a tilling claw according to the first or second aspect, wherein the bent portion is formed by bending.

A tillage claw according to a fourth aspect of the invention is the tillage claw according to any one of the first to third aspects, including at least a wear suppressing portion located on the surface.

According to the present invention, required power can be reduced.

It is a side view of the agricultural working machine provided with the tillage nail which concerns on the 1st Embodiment of this invention. It is a side view of the same tillage nail. It is a bottom view of the same tillage nail. It is a sectional view of the same tillage nail. It is a side view of the tillage nail which concerns on the 2nd Embodiment of this invention. It is a sectional view of the same tillage nail. It is a side view of the tillage nail which concerns on the 3rd Embodiment of this invention. It is a bottom view of the same tillage nail. It is a sectional view of the same tillage nail.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

In FIG. 1, reference numeral 1 denotes an agricultural work machine, which is connected to a rear portion of a tractor (not shown) that is, for example, a traveling vehicle, and the tractor travels to move forward in a field (moving direction) to cultivate. It is a rotary tiller (cultivator) that performs leveling work (agricultural work).

The agricultural work machine 1 includes a machine body 2 that is detachably connected to a three-point link section at the rear of the tractor, and a rotatably provided rotatably machine body 2 that rotates in a predetermined direction (for example, a rotation direction of a downcut direction). It comprises a cultivating body (rotary) 3 and a leveling body (level plate) 4 which is provided on the machine body 2 so as to be rotatable in the up-and-down direction and which performs a leveling work behind the cultivating body 3.

The machine body 2 has a three-point connecting portion (running vehicle connecting portion) 11 that is detachably connected to a three-point link portion on the rear portion of the tractor. The three-point connecting portion 11 is composed of one top mast 12 and left and right lower arms 13 and the like.

Further, the machine body 2 has a mission case portion 17 that is a shaft holding portion that rotatably holds the input shaft 16 in the front-rear direction. Inner ends of a frame pipe portion 18, which is a frame portion extending in the left-right direction, are attached to both left and right sides of the mission case portion 17. The input shaft 16 is connected to the PTO shaft of the tractor via a joint (not shown).

Further, a chain case portion 19 which is a box-shaped tiller support portion is attached to the outer end portion of the left frame pipe portion 18. A bracket portion (not shown) which is a plate-shaped cultivating body support portion is attached to the outer end portion of the right frame pipe portion 18. Further, the tiller 3 is rotatably installed between the chain case portion 19 and the bracket portion that are spaced apart from each other and face each other. A side cover plate 20, which is a side plate portion, is fixed to the chain case portion 19 and the bracket portion.

Further, the machine body 2 has a tilling cover portion 21 that covers an upper portion of the tiller body 3, and the ground leveling body 4 is vertically rotatable about a horizontal axis 10 at a rear end portion of the tiller cover portion 21. It is provided in. In addition, between the ground leveling body 4 and the machine body 2, a ground pressure adjusting means 22 for adjusting the ground pressure of the ground leveling body 4 with respect to the field scene is installed. A gauge wheel 23 is provided at the front of the machine body 2.

The cultivating body 3 has a cultivating shaft 31 that is a rotating shaft in the left-right direction that rotates based on the power from the input shaft 16 side. The cultivating shaft 31 has a shaft main body 32 having a shaft shape elongated in the left-right direction, and a flange portion 33 that is a plurality of plate-shaped pawl mounting portions protruding from a plurality of positions of the shaft main body 32. .. Then, the cultivating work is performed on each flange portion 33 while rotating in the predetermined rotation direction (arrow direction in the figure) about the rotation center axis line (rotation center P) X in the left-right direction due to the rotation of the cultivating shaft 31. A plurality of tilling claws 35 are detachably attached by attaching means 36. The mounting means 36 is, for example, a bolt and a nut.

Here, the tillage claw 35 of the tiller 3 will be described in detail.

As shown in FIGS. 2 to 4, the tilling claw 35 is formed of a curved plate-shaped metal plate member having a longitudinal direction in a direction intersecting the rotation direction. That is, the curved plate-shaped tilling claw 35 is made up of only one metal plate, and is from the base end side (the rotation center P side of the tiller 3) which is one end side in the longitudinal direction to the other end side in the longitudinal direction. It is constituted by three parts, that is, a mounting base part 41, a vertical blade part 42, and a horizontal blade part 43, which are successively located toward the tip side (outer peripheral side of the tiller 3).

In other words, the plowing claw 35 includes a mounting base 41 that is detachably attached to the flange portion 33 of the plowing shaft 31 by the mounting means 36, and a vertical blade portion 42 that is continuously provided at the end portion on the tip side of the mounting base 41. The vertical blade portion 42 is provided with a horizontal blade portion 43 continuous with the end portion on the front end side.

In addition, the tilling claw 35 is curved in the counter-rotational direction side (counter-rotational direction side opposite to the rotation direction) from the vertical blade portion 42 to the horizontal blade portion 43, and the horizontal blade portion 43 forms the rising line a at the base end. Is curved so as to gradually rise toward the surface side (upper side in FIG. 3) which is one side. The rising line a to the surface side of the tilling claw 35 is a boundary line between the vertical blade portion 42 and the horizontal blade portion 43, and the vertical blade portion 42 and the horizontal blade portion 43 form the nail body portion (vertical and horizontal). Blade part) 45 is configured.

The claw main body portion 45 including the blade portions 42 and 43 has, on the front side in the rotation direction, a long blade-shaped portion 51 having an inclined blade-shaped surface 50 formed by blade attachment on the back surface. That is, the claw main body portion 45 is a body plate portion 52 having a constant plate thickness (including one having a substantially constant plate thickness) that is not bladed and does not have the bladed surface 50, and the rotation direction of the body plate portion 52. And a bladed portion 51 having a bladed surface 50 and having a substantially triangular cross-section (a plate thickness thinner toward the front end in the rotation direction). In other words, the claw main body portion 45 is configured by the bladed portion 51 and the main body plate portion 52 that is a portion of the claw body portion 45 excluding the bladed portion 51.

The broken line (proximal end 50a of the bladed surface 50) in FIG. 2 is the boundary line between the main body plate portion 52 and the bladed portion 51 on the back surface of the tilling claw 35. Further, the main body plate portion 52 is not limited to one having a constant plate thickness, and may have a different plate thickness.

Further, the claw main body portion 45 has a bent portion 55, which is a bent portion bent in a curved shape toward the back surface side by bending (pressing or the like), on the front side in the rotation direction at the intermediate portion in the longitudinal direction. That is, of the claw main body portion 45, the portion on the front side in the rotation direction at the longitudinal middle portion thereof is bent into a curved portion 55 toward the back surface side with the bending start line b as the base end. The bent portion 55 is formed in a substantially elliptical shape in a side view, for example, extending over both the vertical blade portion 42 and the horizontal blade portion 43 (see FIG. 2 ).

Therefore, of the bladed portion 51, the portions located on the one end side in the longitudinal direction (prong base end side) and the other end side in the longitudinal direction (prong tip end side) with respect to the surface 52a of the main body plate portion 52 in cross section. The front side same surface 56 located in the same plane shape (including substantially the same plane shape) and the rear surface 52b of the main body plate portion 52 in a sectional view are inclined surface shapes (including a substantially inclined surface shape), that is, toward the rotation direction. Accordingly, the rear side inclined surface 57 is located in the shape of an inclined surface that gradually inclines toward the front side.

On the other hand, the portion of the bladed portion 51 located at the longitudinal intermediate portion is inclined in a plane shape (including a substantially inclined plane shape) with respect to the surface 52a of the main body plate section 52 in the cross-sectional view, that is, in the rotation direction. According to the above, a front side inclined surface 61 located in the shape of an inclined surface gradually inclining to the back surface side, and a back side parallel surface 62 located in a parallel shape (including a substantially parallel shape) to the back surface 52b of the main body plate portion 52 in a sectional view. have.

That is, as shown in the “AA cross-sectional view” of FIG. 4, the portion of the bladed portion 51 located on the one end side in the longitudinal direction (the end portion on the mounting base 41 side) is the same surface 56 on the front side and the inclined surface 57 on the back side. As shown in the “BB cross-sectional view” of FIG. 4, the portion of the bladed portion 51 located at the longitudinal middle portion (the bent portion 55) has the front side inclined surface 61 and the back side parallel surface 62. As shown in the “C-C cross-sectional view” of FIG. 4, the portion of the bladed portion 51 located on the other end side in the longitudinal direction (the end portion on the side opposite to the mounting base 41 side) is the same surface on the front side. 56 and a back side inclined surface 57. As is clear from FIG. 4, the front surface 52a of the main body plate portion 52 has a front curved surface portion 63 at the bent portion 55, and the back surface 52b of the main body plate portion 52 has a back curved surface portion 64 at the bent portion 55. ing.

Further, the bladed portion 51 has a bladed tip portion 51a at the front edge portion in the rotational direction. Then, as shown in FIG. 3, in the bladed tip portion 51a, the portions located at one end side in the longitudinal direction and the other end side in the longitudinal direction are located on the front side of the tillage pawl 35 in bottom view and located at the middle portion in the longitudinal direction. The part to be placed is located on the back side of the tilling claw 35 in a bottom view. As is apparent from FIG. 3, the bending start point (transition start point) S of the bladed tip portion 51a of the vertical blade portion 42 is located closer to the base end side than the rising line a.

In the bent portion 55, the bladed tip 51a of the bladed portion 51 is located on the back surface side of the back surface 52b of the main body plate portion 52 (see "BB cross-sectional view" in FIG. 4). The present invention is not limited to this. For example, since the bending amount of the bent portion 55 is small, the bladed tip portion 51a may be located on the front surface side of the back surface 52b of the main body plate portion 52. In the “BB cross-sectional view” of FIG. 4, the inclination angle α of the front-side inclined surface 61 with respect to the surface 52a of the main body plate portion 52 is, for example, 1 to 35 degrees, preferably 18 degrees.

On the other hand, in the mounting base 41, a plurality of, for example, two bolt holes 65 are formed so as to penetrate the front and back surfaces. Similarly, the flange portion 33 of the cultivating shaft 31 is also formed with bolt holes penetrating the front and back surfaces, and the bolts of the attachment means 36 are inserted into these bolt holes and the nuts are screwed into the bolts. As a result, the attachment base 41 is attached to the flange portion 33 of the tillage shaft 31.

Then, the tilling claw 35 rotates in the direction of the arrow in the drawing with the rotation center P (rotation center axis line X) as the center and the maximum rotation radius r as the maximum rotation radius while being attached to the flange portion 33 of the tilling shaft 31. While doing the plowing work (see Figure 1).

Next, the operation and the like of the farm work machine 1 will be described.

When the agricultural working machine 1 is connected to the rear part of the tractor and the forward traveling of the tractor causes the agricultural working machine 1 to move forward, which is the direction of travel, each plowing claw 35 of the cultivating body 3 rotates to perform plowing work, and behind it. The leveling body 4 performs leveling work.

Further, according to the cultivating claw 35 of this agricultural work machine 1, since the claw main body part 45 has the bent part 55 in the longitudinal direction intermediate part, the longitudinal direction one end side and the longitudinal direction other end side of the bladed portion 51 are provided. The positioned portion is a front side same surface 56 that is located flush with the front surface 52a of the main body plate portion 52 in a cross-sectional view, and a back side that is located in a slanting plane shape with respect to the back surface 52b of the main body plate portion 52 in a cross-sectional view. Since the portion having the inclined surface 57 and located at the middle portion in the longitudinal direction has the front-side inclined surface 61 positioned in the shape of an inclined surface with respect to the surface 52a of the main body plate portion 52 in a sectional view, the conventional tillage Not only is it more difficult to hold the soil during plowing work than nails, but the soil can be cultivated more efficiently by the bladed portion 51 with the bladed surface 50, thus reducing the required power and reducing vibration. Can also be planned.

In addition, as shown in FIGS. 5 and 6, for example, the tilling claw 35 has a hard metal portion 71, which is a wear suppressing portion made of a relatively hard metal material, which is located at least on the surface of the tilling claw 35, in order to suppress wear. It may be equipped with. That is, this tillage claw 35 is the one according to the first embodiment, in which the hard metal portion 71 is welded to the surface (including at least the entire surface of the bent portion 55).

Specifically, the tilling claw 35 includes a claw main body 72 including a mounting base 41, a vertical blade 42 and a horizontal blade 43, and the claw main body 72 is formed on the surface of the claw main body 72. The hard metal portion 71 made of a metal material harder than the metal material is provided by welding, and the hard metal portion 71 covers and protects the entire surface of the bent portion 55 (including substantially the entire surface). ing. Although not shown, for example, the hard metal portion 71 may be provided on both the front surface and the back surface of the claw main body 72. Further, for example, the hard metal portion 71 may be provided so as to cover only a part of the surface of the bent portion 55, not the entire surface of the bent portion 55.

Further, as shown in FIGS. 7 to 9, for example, as shown in FIGS. 7 to 9, the cultivating claw 35 may have a bent portion 55 smaller than that of the first embodiment.

Specifically, in this cultivating nail 35, only the middle portion in the longitudinal direction of the bladed portion 51 of the nail main body portion 45 is bent toward the back surface side to form a bent portion 55. In other words, in this tilling claw 35, only the bladed portion 51 having the bladed surface 50 (allowing the main body plate portion 52 to be slightly near) is bent toward the back surface by bending. Therefore, the plowing claw 35 has an inclined surface shape (including a substantially inclined surface shape) with respect to the rear surface 52b of the main body plate portion 52 in cross section, that is, the rear surface side in the rotational direction, instead of the rear side parallel surface 62. It has a back side inclined surface 70 located in the shape of an inclined surface that gradually inclines.

Further, the tilling claw 35 is not limited to the configuration in which the bladed surface 50 is formed only on the back surface, and for example, the configuration in which the tapered bladed surface 50 is formed on the front surface and the back surface in a predetermined portion of the nail main body portion 45 and the like. Good.

Further, the bladed surface 50 is not limited to the one that is bladed by press working, and may be, for example, a cutting work, a bladed work (for example, a work in which a blade is squeezed between two rollers). The method of forming the bladed surface 50 is arbitrary.

Further, the bent portion 55, which is a bent portion bent toward the back surface side, is preferably formed over both the vertical blade portion 42 and the horizontal blade portion 43, but the vertical blade portion 42 and the horizontal blade portion 43 At least one of them, for example, at least the horizontal blade portion 43 may be formed, and for example, although not shown, it may be formed only on the horizontal blade portion 43.

Further, the tilling claw 35 can be used not only for the rotary tiller but also for various agricultural work machines that perform agricultural work accompanied by tilling work.

Although some embodiments of the present invention and modifications thereof have been described, the respective embodiments and modifications may be appropriately combined without departing from the gist of the present invention.

1 farm work machine
31 Tillage axis that is the axis of rotation
35 tillage claws
41 Mounting base
42 Vertical blade
43 Horizontal blade
51 Bladed part
52 Body plate
52a Body plate surface
52b Back side of body plate
55 Bent part that is a bend
56 Same side on front side
57 Back slope
61 Front slope
71 Hard metal part that is the wear suppression part

Claims (4)

A mounting base that is attached to the rotary shaft of the agricultural work machine,
A vertical blade portion continuously provided on the end portion on the front end side of the mounting base,
With a horizontal blade portion continuously provided at the end on the tip side of this vertical blade portion,
While curving from the vertical blade portion to the horizontal blade portion in the direction opposite to the rotation direction, the horizontal blade portion is a plowing pawl that is curved to the surface side that is one side,
The vertical blade portion and the horizontal blade portion have a main body plate portion and a bladed portion that is continuously provided to the main body plate portion,
Of the bladed portion, the portions located on the one end side in the longitudinal direction and the other end side in the longitudinal direction, the front side same surface located in the same plane shape with respect to the surface of the main body plate portion in the cross sectional view, It has a back side inclined surface positioned in an inclined surface shape with respect to the back surface of the main body plate portion,
Of the bladed portion, the portion located in the longitudinal intermediate portion has a front-side inclined surface positioned in an inclined surface shape with respect to the surface of the main body plate portion in a sectional view,
The Tateha portion and the lateral edge at least one of the portions, plowing耘爪characterized by having a curved bend toward the rear side in the rotational direction front side. Bend the tilling claws according to claim 1, characterized in that it is formed across both Tateha portion and Yokoha unit. The plow claw according to claim 1 or 2 , wherein the bent portion is formed by bending. The tillage claw according to any one of claims 1 to 3 , further comprising a wear suppressing portion located at least on the surface.

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