JPS5840801Y2 - Cultivating claws - Google Patents

Description

【考案の詳細な説明】 この考案は耕耘爪に関し、さらに詳しくは偏心型耕耘爪
の改良に関する。[Detailed Description of the Invention] This invention relates to a tilling claw, and more specifically relates to an improvement of an eccentric type tilling claw.

偏心型耕耘爪は耕耘ロータリなどのチェンケース際の土
おとしや残耕処理などに用いられているもので、取付部
と縦刀身とが互にほぼ平行する平面内に大***置すると
共に、両者の間が偏心部で連結された構成となっている
。Eccentric tilling claws are used for removing soil from the chain case of rotary tillers and for removing residual tillage.The mounting part and the vertical blade are generally located in a plane that is almost parallel to each other, and the two The two parts are connected by an eccentric part.

このような耕耘爪では、偏心部分でよく屈曲し、使用に
耐えられなくなる欠点を有している。Such plowing claws have the disadvantage that they often bend at eccentric portions, making them unusable.

即ち、耕耘作業中に横力部が耕土中の石を叩いて衝撃を
受けたような場合に、耕耘爪は取付基部を中心として縦
刃部が反横力部側に曲げ荷重を受けることになる。In other words, if the lateral force part hits a stone in the tilled soil and receives an impact during tilling work, the vertical blade part of the tilling claw will receive a bending load toward the side opposite to the lateral force part, centering on the mounting base. Become.

この現象をさらに詳しく説明すると、耕耘爪の取付基部
を固定しておき、横力部の向きと反対の向きに、横力部
分に荷重を加えたと同様の状態となり、縦刃部は曲げ荷
重を負担することになって、衝撃が大きい場合には取付
基部付近、即ち偏心部分で折損したり、折曲りでしまう
ことがあった。To explain this phenomenon in more detail, if the mounting base of the tiller claw is fixed and a load is applied to the horizontal force part in the opposite direction to the horizontal force part, the same state will occur, and the vertical blade part will not bend the load. If the impact is large, it may break or bend near the mounting base, that is, at the eccentric portion.

このような問題を防止するために、耕耘爪の刀身部には
一方向に突出したりブを形成して、耕耘爪の曲げ荷重に
対する抵抗力を増大したものが知られている。In order to prevent such problems, it is known that the blade portion of the tiller claw is protruded in one direction or has a groove formed thereon to increase the resistance of the tiller claw to the bending load.

リブを形成した耕耘爪は曲げ荷重に対して抵抗力を発揮
できることは周知の通りである。It is well known that tilling claws having ribs can exhibit resistance to bending loads.

このリブは有効高さが大きい程対曲げ荷重抵抗力が大き
く、耕耘爪の折損も防げるのであるが、リブ形成基部に
応力集中現象が生じて極端に強度が低下することがあっ
て、リブ自体の形状にも問題もあり、加えて後述するよ
うにリブの向きにも問題がある。The larger the effective height of this rib, the greater its resistance to bending load, which prevents breakage of the tiller claws.However, stress concentration phenomenon occurs at the base of the rib formation, resulting in an extreme decrease in strength, and the rib itself There is also a problem with the shape of the rib, and in addition, there is also a problem with the direction of the ribs, as will be described later.

即ち、耕耘爪の偏心部での折損は単なる曲げ荷重だけで
生じるのではなく、横力部が石を叩いた場合の衝撃は曲
げ荷重であると共に捩り荷重、さらには座屈荷重であっ
たりするので、必ずしも耕耘爪におけるリブの向きは横
力部側に突出するのが理想であるとするには多少の疑問
があった。In other words, breakage at the eccentric part of the tiller claw is not caused only by a simple bending load, but the impact when the lateral force part hits a stone is not only a bending load but also a torsional load, and even a buckling load. Therefore, there was some doubt as to whether the ideal direction of the ribs in the tilling claw should be to protrude toward the lateral force section.

このような見地に立って発明者らは永年実地試験を繰返
し、耕耘爪の偏心部における折損あるいは屈曲などが防
止できる形状について満足すべきものを得るのに成功し
たのである。From this point of view, the inventors have repeatedly conducted field tests over many years and succeeded in obtaining a satisfactory shape that prevents breakage or bending of the eccentric portion of the tiller claw.

以下、この考案の詳細を添付した図面に沿って説明する
。The details of this invention will be explained below with reference to the attached drawings.

先ず、図に示す耕耘爪は縦刀部１、その縦刀部１の先端
を曲げて構部した横力部２、さらには耕耘軸に対して取
付けるための前記縦刀部１と連続する取付部３によって
構成されている。First, the tilling claw shown in the figure has a vertical blade part 1, a horizontal force part 2 formed by bending the tip of the vertical blade part 1, and an attachment continuous with the vertical blade part 1 for attachment to the tilling shaft. It is composed of section 3.

そして、縦力部１の幅方向断面形状は、取付部３との刀
身長さ方向に沿って境界部付近から、はぼ中央にわたっ
てその幅方向断面が曲面成形されており、その曲面の膨
出方向は横力部２と反対力向になっていて、凸曲部１１
に対応する凹曲部１２は横力部側に存在している。The cross-sectional shape in the width direction of the vertical force part 1 is formed into a curved surface from the vicinity of the boundary part along the length direction of the blade length with the attachment part 3 to the center of the blade, and the curved surface bulges. The direction of the force is opposite to that of the lateral force section 2, and the convex curved section 11
A concave curved portion 12 corresponding to the lateral force portion exists on the side of the lateral force portion.

この凸曲部１１は、第１図に示すように、基縁１ａより
刃縁１ｂ側の方が長く、基縁１ａにおいては縦力部のほ
ぼ１／２、刃縁１ｂにおいては縦力部のほぼ２７３位の
ところまであり、横力部２に連なる部分近くではほぼフ
ラットでろって、このフラット部分と凹曲部１２との境
界部では縦力部１の高さ方向の中心線に沿って屈曲した
状態となっている。As shown in FIG. 1, this convex curved portion 11 is longer on the blade edge 1b side than the base edge 1a, and is approximately 1/2 of the vertical force portion at the base edge 1a and the vertical force portion at the blade edge 1b. It is almost flat near the part connected to the lateral force part 2, and at the boundary between this flat part and the concave curved part 12, it extends along the center line in the height direction of the longitudinal force part 1. It is in a bent state.

言換えると、凸曲部、凹曲部、凹曲部が消滅する部分の
近くでは凸曲部側にサクション空間Ｓが形成され打込み
時の抵抗を減じている。In other words, a suction space S is formed on the side of the convex curve near the convex curve, the concave curve, and the part where the concave curve disappears, thereby reducing the resistance during driving.

とくに、はぼ平行する平面内に大***置する縦刀部１の
後端と取付部３０間に存在する偏心部Ｈにおいても、そ
の側面は縦力部２側にくぼんだ凹曲部１２′が形成され
、反対側は凸曲部１１′となっている。In particular, even in the eccentric part H that exists between the rear end of the vertical sword part 1 and the attachment part 30, which are generally located in parallel planes, the side surface thereof has a concave curved part 12' recessed toward the vertical force part 2 side. The opposite side has a convex curved portion 11'.

また、偏心部Ｈの全域から縦刃部１０所定範囲は、第２
図ないし第４図で明らかなように、その全体が曲面を形
成している。Further, a predetermined range of the vertical blade portion 10 from the entire area of the eccentric portion H is the second
As is clear from the figures to FIG. 4, the entire surface forms a curved surface.

この考案は上述のような構成であるから、縦力部１に作
用する曲げ荷重により生じる曲げモーメントに対し、縦
力部１および偏心部Ｈは、太きい曲げ荷重に対し抵抗す
ることができるのである。Since this device has the above-mentioned configuration, the longitudinal force section 1 and the eccentric section H can resist the large bending load against the bending moment generated by the bending load acting on the longitudinal force section 1. be.

即ち、曲面の凸側から荷重が加わる場合と、曲面の凹側
から荷重が加わる場合との機械的強度は後者の力が優れ
ている。That is, the mechanical strength is superior when a load is applied from the convex side of the curved surface and when the load is applied from the concave side of the curved surface.

それは、曲面の凸側から曲げ荷重が加わると、曲面の断
面開放端縁が外方に拡がる断面変形が生じるので、一旦
変形が生じるとその曲面材は既に曲面材としての強度を
もたず、平板としての強度しか期待できない。This is because when a bending load is applied from the convex side of a curved surface, cross-sectional deformation occurs in which the open end of the curved surface expands outward, so once deformation occurs, the curved material no longer has the strength as a curved material. We can only expect strength as a flat plate.

また、曲面の凹面側から曲げ荷重が加わった場合、断面
開放端縁には引張応力が発生して弾性限界内であれば変
形による残留歪が生じなく、折損、折曲しやすい状態に
陥らない。In addition, when a bending load is applied from the concave side of a curved surface, tensile stress is generated at the open edge of the cross section, and if it is within the elastic limit, no residual strain will occur due to deformation, and it will not be prone to breakage or bending. .

以上の説明から明らかなように、この考案の耕耘爪によ
れば、耕耘作業時に偏心部が受ける曲げ等の荷重に対処
できるように、偏心部に横力部の屈曲側の側面全体が凹
み、その反対側の側面全体が膨出する曲面を形成したか
ら、最も荷重がかかり折曲り易い部分が確実に補強され
、耐久性の向上、打込時の抵抗軽減に寄与することがで
き、また、強度が増すので爪全体を薄く、軽く構成する
ことができ、省資源、省動力の耕耘爪を廉価に生産でき
る。As is clear from the above description, according to the tilling claw of this invention, the entire side surface on the bending side of the lateral force part is recessed in the eccentric part so that it can cope with the bending load etc. that the eccentric part receives during tilling work. Since the entire side surface on the opposite side has a curved surface that bulges out, the part that receives the most load and is easily bent is reliably reinforced, contributing to improved durability and reduced resistance during driving. Since the strength is increased, the entire claw can be made thinner and lighter, and resource-saving and power-saving tilling claws can be produced at low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

添付図面は、この考案による耕耘爪の好ましい一実施例
を示し、第１図は同側面図、第２図乃至第６図は第１図
に示す■−■線乃至ＶＩ−ＶＩ線に沿う断面図、第７図
は正面図である。 １・・・・・・縦刀部、２・・・・・・横力部、３・・
・・・・取付部、１１．１１’・・・・・・凸曲部、１
２．１２’・・・・・・凹曲部、Ｈ・・・・・・偏心部
。The attached drawings show a preferred embodiment of the tilling claw according to this invention, and FIG. 1 is a side view of the same, and FIGS. 2 to 6 are cross-sectional views taken along the line ■-■ to VI-VI shown in FIG. 1. FIG. 7 is a front view. 1...Vertical sword part, 2...Horizontal force part, 3...
...Mounting part, 11.11'...Convex curved part, 1
2.12'...Concave curved part, H...Eccentric part.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 等角渦線またはこれに類似の曲線にほぼ沿う刃縁をもつ
縦刃部と、この縦刃部の先端に耕耘爪軸を軸心とする仮
想円筒の局面に沿った形状に設けた横力部と、縦刃部の
後端に連続して形成されている取付部とを備え、前記取
付部と縦刃部とを、はぼ平行する平面内に大***置させ
て偏心部で連結している耕耘爪において、前記偏心部は
、横力部の屈曲側の側面全体が凹み、その反対側の側面
全体が膨出する曲面で形成したことを特徴とする耕耘爪
。A vertical blade part with a blade edge that roughly follows an equiangular vortex line or a similar curve, and a lateral force provided at the tip of this vertical blade part in a shape that follows the surface of an imaginary cylinder with the tilling claw axis as the axis. and a mounting part formed continuously at the rear end of the vertical blade part, and the mounting part and the vertical blade part are connected by an eccentric part, with the mounting part and the vertical blade part being approximately located in parallel planes. The tilling claw is characterized in that the eccentric portion is formed with a curved surface in which the entire side surface on the bending side of the lateral force portion is recessed, and the entire side surface on the opposite side thereof is bulged.