JP3722581B2 - Tillage claw holding configuration - Google Patents

Tillage claw holding configuration Download PDF

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Publication number
JP3722581B2
JP3722581B2 JP06860197A JP6860197A JP3722581B2 JP 3722581 B2 JP3722581 B2 JP 3722581B2 JP 06860197 A JP06860197 A JP 06860197A JP 6860197 A JP6860197 A JP 6860197A JP 3722581 B2 JP3722581 B2 JP 3722581B2
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JP
Japan
Prior art keywords
biting
tilling
insertion hole
longitudinal direction
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP06860197A
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Japanese (ja)
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JPH10262405A (en
Inventor
孝明 須藤
喜孝 福田
勝 山本
俊吾 松本
俊朗 森木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yanma Agricultural Equipment Co Ltd
Yanmar Co Ltd
Original Assignee
Yanma Agricultural Equipment Co Ltd
Yanmar Co Ltd
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Filing date
Publication date
Application filed by Yanma Agricultural Equipment Co Ltd, Yanmar Co Ltd filed Critical Yanma Agricultural Equipment Co Ltd
Priority to JP06860197A priority Critical patent/JP3722581B2/en
Publication of JPH10262405A publication Critical patent/JPH10262405A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、耕耘爪軸の外周面上に固設するホルダーにワンタッチで装着する耕耘爪を安定して支持する構成に関する。
【0002】
【従来の技術】
従来から、トラクターや耕耘機の後部にロータリ耕耘装置を付設して耕耘作業を行っていた。
このロータリ耕耘装置は、複数個の耕耘爪を固設する回転軸を回転駆動させることによって耕耘を行うものであり、耕耘爪は通常ナタ爪を用いて、耕耘爪軸上に略一定間隔をおいて、放射状にホルダーを植設し、該ホルダー内に耕耘爪の基部を挿入し、支持ピンで係止する着脱の容易な構成としていた。
また、耕耘爪を安定してホルダー内に保持する構成として、ホルダーの左右側部板を耕耘爪の形状に合わせて屈曲して形成し、左右の側部板を溶接によって固着して耕耘爪をホルダー内に安定して支持していたが、耕耘爪の着脱が困難なものであった。
更に、耕耘爪の基部の左右側面を凹状に凹ませて形成し、ホルダー側の左右側面に耕耘爪の凹状に略一致するように形成し、耕耘爪の側面を平面視で四点をホルダーの側面に食い込まして安定して保持する技術も公知となっている。
【0003】
【発明が解決しようとする課題】
しかし、従来の耕耘爪の着脱構成において、耕耘爪の側面を平面視で四点で支持する構成は、耕耘爪の装着は容易であるが、耕耘爪を保持する力は弱いものであった。
また、図9〜図11に示すように、該耕耘爪13を挿入するホルダー側挿入孔14aの平面形状を略菱形に形成し、左右側面を内側より外側に向けて左右幅を狭くするテーパ状の当接面14bを形成する一方、耕耘爪13基部の左右側面の中央位置に外側方向に凸状とする食い込み部13aを形成し、該耕耘爪13基部をホルダーの挿入孔14a内に挿入することで、食い込み部の角部が挿入孔14a内のテーパ状の当接面14bに食い込むことで耕耘爪13を保持する構成としていた。
この食い込んだ部分は、図11に示す平面視のように、角部による点接点となっており、当接面によって当接される範囲が、図10に示すように耕耘爪13基部に対して狭い面積となっていた。
従って、この耕耘爪13を圃場内に打ち込んだ時に耕耘抵抗が小さいと、耕耘爪13が外れたり、耕耘爪13が傾むくなど、耕耘爪13を安定して支持することができないものとなり、耕耘性能の悪くなるものとなっていた。
【0004】
【課題を解決するための手段】
本発明は、以上の如き課題を解決するために、次のような手段を用いるものである。
耕耘爪軸12上に放射状にホルダー14を固設し、該ホルダー14に挿入孔14aを開口し、該挿入孔14aは平面視略菱形に形成され、挿入孔14aの長手方向の左右側面の前後中央部に、左右側面を外側に凹状とするガイド溝14bを形成し、該ガイド溝14bに延設して前後に当接面14c・14cを形成し、該ガイド溝14bは、平面視において前後方向の長さLとし、該ガイド溝14bに延設される当接面14cのテーパの角度は、挿入孔14aの長手方向を基準として角度θ内側に傾斜形成し、耕耘爪13の基部に、平面視で長手方向に対して、左右の側面の前後方向中央部に食い込み部13aを構成し、該食い込み部13aを前記当接面14c・14cに食い込ませて耕耘爪を保持する構成において、前記食い込み部13aは、長手方向の両側の前後位置に食い込み面13b・13bを構成し、食い込み面13b・13bの間の前後方向の中央部を、耕耘爪の長手方向と平行な被ガイド部13cに構成し、前記食い込み面13bのテーパの角度は、長手方向を基準として角度θに形成し、耕耘爪13基部を挿入孔14aに挿入した際に、食い込み面13bと当接面14cとを平行状に構成し、前記食い込み部13aの平面視における長手方向の長さmは、前記挿入孔14aのガイド溝14bの長さLより若干短く形成したものである。
【0005】
【発明の実施の形態】
本発明の構成の実施例を添付の図面を用いて説明する。
図1は本発明の耕耘爪を配置したロータリ耕耘装置の平面図、図2は耕耘爪の側面図、図3は同じく平面図、図4は耕耘爪を保持するホルダーの側面図、図5は同じくホルダーの平面図、図6は本発明の耕耘爪基部の平面図、図7はホルダーに挿入した耕耘爪基部を示す側面図部分断面図、図8はホルダーに挿入した耕耘爪基部を示す部分平面図、図9は従来の耕耘爪の基部を示す側面図、図10はホルダーに挿入した従来の耕耘爪基部を示す側面図部分断面図、図11はホルダーに挿入した従来の耕耘爪基部を示す部分平面断面図である。
【0006】
トラクタや耕耘機に装着するサイドドライブ型のロータリ耕耘装置Aに耕耘爪13・13・・・をワンタッチで装着する実施例について図1より説明する。
ロータリ耕耘装置Aは中央上部にギアボックス1を配置して、該ギアボックス1より前方に入力軸2を突出し、該入力軸2にユニバーサルジョイントやドライブ軸を介して本機のPTO軸と連結して動力を伝えるようにしている。前記ギアボックス1の側面より両側方にビーム3・3を突出し、該ビーム3・3上のギアボックス31両側に支持プレートを固設し、該支持プレートの前端にはロアリンクを枢結するピンを突設し、後端にはデプスフレームの前端を枢支するように構成している。
【0007】
前記一側のビーム3の外側端にチェーンケース10上部が固設され、他側ビーム3の他端に図示しないサイドサポートを固設し、該チェーンケース10下部とサイドサポートの下部の間に耕耘爪軸12が横架され、該耕耘爪軸12上に、側面視で放射状にナタ爪よりなる多数の耕耘爪13・13・・・が植設され、該耕耘爪13の回転軌跡の上方が耕耘カバーによって覆われ、両側はサイドカバーによって覆われている。
そして、該耕耘爪軸12は前記入力軸2よりギアボックス1内のベベルギア23・24、ビーム3内の伝動軸25、チェーンケース10内のスプロケット26・27、チェーン28を介して駆動され、耕耘爪13・13・・・が回転されることによって耕耘が可能とされている。
【0008】
次に、耕耘爪13の取付構成について説明する。
本実施例ではホルダータイプで、耕耘爪軸12の外周上にホルダー14・14・・・が突設され、該ホルダー14・14・・・に耕耘爪13が挿入されている。該ホルダー14・14・・は側面視放射状に、左右(軸)方向には略一定間隔をあけて突出されている。前記ホルダー14の挿入孔内に、ナタ爪よりる耕耘爪13の基部が挿入され、該耕耘爪13基部とホルダー14側面を貫通する支持ピン15が挿入され、耕耘爪13が装着されている。該耕耘爪13は、図2、図3に示すように切り込んでから土を反転させるために先端部は、右又は左に湾曲させており、この湾曲方向は耕耘作業の種類によって取付時に変更される。図3は左側に湾曲させた耕耘爪13を示している。
【0009】
前記ホルダー14の挿入孔14aは、耕耘爪13基部より大きく形成され、容易に挿入若しくは抜脱するようにし、作業時には、耕耘爪13が挿入孔14a内に挟持されるようにしている。
即ち、図4、図5に示すように、前記挿入孔14aは平面視略菱形に形成され、挿入孔14aの左右側面(図4の紙面上の左右両側の側面)の中央部に、左右側面を外側に凹状とするガイド溝14b・14bが形成され、該ガイド溝14b・14bを耕耘爪13の挿入方向に形成している。平面視において前記ガイド溝14bの長さ(挿入孔14aの長手方向に対する長さ)を長さLとしている。
【0010】
また、前記挿入孔14a左右側面には、ガイド溝14bの両端(図5の紙面上のガイド溝14bの前後端部)より外側の途中位置(図5の上下方向の途中位置)までの範囲で、外側に向かって左右側面の間隔を短くするテーパ状の当接面14c・14cが形成されている。該当接面14cのテーパは、図5に示す平面視のように、挿入孔14aの長手方向を基準として角度θ内側に傾かせて形成したものである。前記当接面14cより更に外側には、当接面14cのテーパ角度θより角度が大きい被装面14dが形成されている。
【0011】
一方、図2、図6に示すように、前記耕耘爪13基部の左右側面の中央部に左右外側に向かって凸状とする食い付き部13a・13aが形成され、該食い付き部13a・13aが耕耘爪13の挿入方向に略耕耘爪13基部の長さに等しく形成されている。該食い付き部13aの平面視における長手方向の長さmは、前記挿入孔14aのガイド溝14bの長さLより若干短く形成し、ガイド溝14b内に食い付き部13aが遊嵌される。
前記ホルダー14に挿入した耕耘爪13基部は、支持ピン15を挿入することで、ホルダー14内に枢支され、支持ピン15を中心として、耕耘爪13基部を傾かせて、食い付き部13aをホルダー14自身の弾性力に抗して当接面14cに食い込ませることで、耕耘爪13を保持する構成としている。
【0012】
そして、本発明において、前記耕耘爪13基部の食い付き部13aの両側(図6の紙面上の上下端)をテーパ状に食い込み面13b・13bが形成されている。該食い込み面13bのテーパの角度は、断面形状を略長方形とする耕耘爪13基部の長手方向を基準として、角度θに形成され、耕耘爪13基部を挿入孔14aに挿入した際に、耕耘爪13基部の食い込み面13bと挿入孔14aの当接面14cとが平行状に配置される。
また、前記耕耘爪13基部の両端の食い込み面13b・13bの間位置には、耕耘爪13基部の長手方向と平行状の被ガイド部13c・13cが形成され、耕耘爪13基部の左右両側に突出する食い付き部13a・13aの左右幅が狭く形成されている。
【0013】
このように構成し、前記耕耘爪13基部をホルダー14に挿入若しくは抜脱するには、耕耘爪13基部の食い付き部13a・13aを挿入孔14aのガイド溝14b内に合わせると、食い付き部13aに被ガイド部13cにより左右外側への突出量が減少されており、食い付き部13aがガイド溝14b内に干渉されることがなく、耕耘爪13基部が円滑に挿入される。
そして、前記ホルダー14側方より支持ピン15を挿入し、耕耘爪13基部を貫通させることで、耕耘爪13基部がワンタッチで装着される。
【0014】
そして、前記耕耘爪13基部を、支持ピン15を中心として挿入孔14a内で回動させると、図7、図8に示すように、当接面14cに食い込み面13bが当接され、ホルダー14の左右側面をホルダー14の弾性力に抗して押し広げながら食い込まれ、ホルダー14側の当接面14cによって、食い込み面13bに加えて中央部の被ガイド部13cとを食い込ますことができ、図8に示す二点鎖線のように、当接面14cとの接触面積が増加され、耕耘爪13を低速度で駆動しても、耕耘爪13基部が保持する姿勢が崩れることなく、安定して保持される。
【0015】
【発明の効果】
本発明は、以上の如く構成したので、次のような効果を発揮するものである。
食い込み部13aは、長手方向の両側の前後位置に食い込み面13b・13bを構成し、食い込み面13b・13bの間の前後方向の中央部を、耕耘爪の長手方向と平行な被ガイド部13cを構成し、前記食い込み面13bのテーパの角度は、長手方向を基準として角度θに形成し、耕耘爪13基部を挿入孔14aに挿入した際に、食い込み面13bと当接面14cとを平行状に構成し、前記食い込み部13aの平面視における長手方向の長さmは、前記挿入孔14aのガイド溝14bの長さLより若干短く形成したので、食い込み面の間位置に平ら状の被ガイド部が形成され、耕耘爪の左右幅を狭く形成したことによって、耕耘爪を着脱する際に、耕耘爪基部を当接面に食い込ませずに、挿入孔の側面中央部に形成するガイド溝内に食い込み部を遊嵌することで、食い込み部を挿入孔に干渉させることなくなり、耕耘爪を容易に着脱させることができるのである。
【図面の簡単な説明】
【図1】 本発明の耕耘爪を配置したロータリ耕耘装置の平面図である。
【図2】 耕耘爪の側面図である。
【図3】 同じく平面図である。
【図4】 耕耘爪を保持するホルダーの側面図である。
【図5】 同じくホルダーの平面図である。
【図6】 本発明の耕耘爪基部の平面図である。
【図7】 ホルダーに挿入した耕耘爪基部を示す側面図部分断面図である。
【図8】 ホルダーに挿入した耕耘爪基部を示す部分平面図である。
【図9】 従来の耕耘爪の基部を示す側面図である。
【図10】 ホルダーに挿入した従来の耕耘爪基部を示す側面図部分断面図である。
【図11】 ホルダーに挿入した従来の耕耘爪基部を示す部分平面図である。
【符号の説明】
A ロータリ耕耘装置
13 耕耘爪
13a 食い込み部
13b 食い込み面
13c 被ガイド部
14 ホルダー
14a 挿入孔
14b ガイド溝
14c 当接面
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration for stably supporting a tilling nail that is attached to a holder fixed on an outer peripheral surface of a tilling nail shaft with one touch.
[0002]
[Prior art]
Conventionally, a rotary cultivator is attached to the rear part of a tractor or a cultivator to perform a cultivating work.
This rotary tilling device performs tilling by rotationally driving a rotating shaft on which a plurality of tilling claws are fixed, and the tilling claws usually use nail claws and are arranged at substantially constant intervals on the tilling claws shaft. In addition, the holder is radially installed, the base of the tilling nail is inserted into the holder, and the holder is easily attached and detached with the support pin.
In addition, as a structure for stably holding the tilling nail in the holder, the left and right side plates of the holder are bent according to the shape of the tilling nail, and the left and right side plates are firmly fixed by welding. Although it was stably supported in the holder, it was difficult to attach and detach the tilling nail.
Further, the left and right side surfaces of the base of the tilling nail are formed in a concave shape, and the left and right side surfaces on the holder side are formed so as to substantially match the concave shape of the tilling nail. A technique of biting into the side surface and stably holding the side surface is also known.
[0003]
[Problems to be solved by the invention]
However, in the conventional detachable configuration of the tilling nail, the configuration in which the side surface of the tilling nail is supported at four points in plan view is easy to mount the tilling nail, but the force to hold the tilling nail is weak.
Further, as shown in FIGS. 9 to 11, the planar shape of the holder side insertion hole 14 a into which the tilling nail 13 is inserted is formed in a substantially rhombus shape, and the right and left side faces outward from the inside, and the taper shape narrows the left and right width. Is formed at the center of the left and right side surfaces of the cultivating claw 13 base, and a biting portion 13a convex outward is formed, and the cultivating claw 13 base is inserted into the insertion hole 14a of the holder. Thus, the cultivating claw 13 is held by the corner portion of the biting portion biting into the tapered contact surface 14b in the insertion hole 14a.
As shown in a plan view shown in FIG. 11, this biting portion is a point contact by a corner, and the range of contact by the contact surface is relative to the base of the tilling claw 13 as shown in FIG. It was a small area.
Therefore, if the tillage claw 13 is driven into the field and the resistance to the cultivation is small, the cultivation claw 13 cannot be supported stably, for example, the cultivation claw 13 may come off or the cultivation claw 13 may tilt. The performance was worse.
[0004]
[Means for Solving the Problems]
The present invention uses the following means in order to solve the above problems.
A holder 14 is fixed radially on the tilling claw shaft 12, and an insertion hole 14a is opened in the holder 14. The insertion hole 14a is formed in a substantially rhombic shape in plan view, and front and rear of the left and right side surfaces in the longitudinal direction of the insertion hole 14a. A guide groove 14b having a concave shape on the left and right side surfaces is formed in the center, and abutting surfaces 14c and 14c are formed on the front and rear sides of the guide groove 14b. The taper angle of the contact surface 14c extending in the guide groove 14b is inclined to the inside of the angle θ with respect to the longitudinal direction of the insertion hole 14a. In the configuration in which the biting portion 13a is formed in the center in the front-rear direction of the left and right side surfaces with respect to the longitudinal direction in plan view, and the biting portion 13a is bitten into the contact surfaces 14c and 14c to hold the tilling nail, The biting portion 13a The biting surfaces 13b and 13b are formed at the front and rear positions on both sides in the longitudinal direction, and the center portion in the front and rear direction between the biting surfaces 13b and 13b is configured as a guided portion 13c parallel to the longitudinal direction of the tilling nail. The taper angle of the surface 13b is formed at an angle θ with respect to the longitudinal direction, and when the base of the tilling claw 13 is inserted into the insertion hole 14a, the biting surface 13b and the contact surface 14c are configured in parallel, The length m in the longitudinal direction in plan view of the biting portion 13a is formed slightly shorter than the length L of the guide groove 14b of the insertion hole 14a .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a plan view of a rotary tiller having the tilling claws of the present invention, FIG. 2 is a side view of the tilling claws, FIG. 3 is a plan view, FIG. 4 is a side view of a holder for holding the tilling claws, and FIG. FIG. 6 is a plan view of the tilling nail base of the present invention, FIG. 7 is a side sectional view showing the tilling nail base inserted into the holder, and FIG. 8 is a portion showing the tilling nail base inserted into the holder. FIG. 9 is a side view showing the base of a conventional tilling nail, FIG. 10 is a side sectional view showing a conventional tilling nail base inserted into the holder, and FIG. 11 is a conventional tilling nail base inserted into the holder. It is a partial plane sectional view shown.
[0006]
An embodiment in which the tilling claws 13, 13,... Are attached to the side drive type rotary tiller A attached to the tractor or the tiller with one touch will be described with reference to FIG.
The rotary tiller A has a gear box 1 at the center upper part, projects an input shaft 2 forward from the gear box 1, and is connected to the input shaft 2 via a universal joint or a drive shaft with the PTO shaft of this machine. To transmit power. Beams 3 and 3 protrude from the side surfaces of the gear box 1 on both sides, support plates are fixed on both sides of the gear box 31 on the beams 3 and 3, and a pin for pivotally connecting a lower link to the front end of the support plate The rear end is configured to pivotally support the front end of the depth frame.
[0007]
An upper part of the chain case 10 is fixed to the outer end of the beam 3 on the one side, a side support (not shown) is fixed to the other end of the other side beam 3, and a tilling nail shaft is provided between the lower part of the chain case 10 and the lower part of the side support. 12 are horizontally mounted on the tilling claw shaft 12, and a plurality of tilling claws 13, 13... Are formed radially from the side as viewed from the side. And both sides are covered by side covers.
The tillage claw shaft 12 is driven by the input shaft 2 through bevel gears 23 and 24 in the gear box 1, a transmission shaft 25 in the beam 3, sprockets 26 and 27 in the chain case 10, and a chain 28. Plowing is possible by rotating the claws 13.
[0008]
Next, the mounting configuration of the tilling claw 13 will be described.
In this embodiment, a holder type, holders 14, 14... Project from the outer periphery of the tilling claw shaft 12, and the tilling claws 13 are inserted into the holders 14, 14 . The holders 14, 14,... Project radially from the side and protrude in the left-right (axial) direction at substantially regular intervals. In the insertion hole of the holder 14, a base portion of a tilling claw 13 made of a nail is inserted, a support pin 15 penetrating the base portion of the tilling claw 13 and the holder 14 is inserted, and the tilling claw 13 is attached. As shown in FIG. 2 and FIG. 3, the tilling claw 13 has its tip portion bent to the right or left in order to reverse the soil, and this bending direction is changed at the time of attachment depending on the type of tilling work. The FIG. 3 shows the tilling claw 13 curved to the left side.
[0009]
The insertion hole 14a of the holder 14 is formed larger than the base of the tilling claw 13 so that it can be easily inserted or removed, and the tilling claw 13 is clamped in the insertion hole 14a during operation.
That is, as shown in FIGS. 4 and 5, the insertion hole 14 a is formed in a substantially rhombus in plan view, and the right and left side surfaces are arranged at the center of the left and right side surfaces (the left and right side surfaces on the paper in FIG. 4) of the insertion hole 14 a. The guide grooves 14b and 14b are formed in a concave shape on the outer side, and the guide grooves 14b and 14b are formed in the insertion direction of the tilling claw 13. The length of the guide groove 14b (the length with respect to the longitudinal direction of the insertion hole 14a) in the plan view is a length L.
[0010]
Further, on the left and right side surfaces of the insertion hole 14a, in the range from the both ends of the guide groove 14b (front and rear end portions of the guide groove 14b on the paper surface of FIG. 5) to an intermediate position outside the intermediate position (intermediate position in the vertical direction in FIG. 5). The tapered contact surfaces 14c and 14c are formed to shorten the distance between the left and right side surfaces toward the outside. The taper of the contact surface 14c is formed to be inclined inward by an angle θ with respect to the longitudinal direction of the insertion hole 14a as seen in a plan view shown in FIG. A mounted surface 14d having an angle larger than the taper angle θ of the contact surface 14c is formed on the outer side of the contact surface 14c .
[0011]
On the other hand, as shown in FIGS. 2 and 6, biting portions 13 a and 13 a that are convex toward the left and right outer sides are formed at the center of the left and right side surfaces of the tilling claw 13 base, and the biting portions 13 a and 13 a are formed. Is substantially equal to the length of the base of the tilling claw 13 in the insertion direction of the tilling claw 13. The length m in the longitudinal direction of the biting portion 13a in plan view is slightly shorter than the length L of the guide groove 14b of the insertion hole 14a, and the biting portion 13a is loosely fitted in the guide groove 14b.
The cultivating claw 13 base inserted into the holder 14 is pivotally supported in the holder 14 by inserting the support pin 15, and the cultivating claw 13 base is tilted around the support pin 15, so that the biting portion 13 a is tilted. The tilling claws 13 are held by biting into the contact surface 14c against the elastic force of the holder 14 itself.
[0012]
In the present invention, both sides (upper and lower ends on the paper surface of FIG. 6) of the biting portion 13a of the base of the tilling claw 13 are formed so that the biting surfaces 13b and 13b are tapered. The taper angle of the biting surface 13b is formed at an angle θ with respect to the longitudinal direction of the base of the tilling claw 13 having a substantially rectangular cross-sectional shape, and when the tilling claw 13 is inserted into the insertion hole 14a, the tilling claw The 13 base biting surface 13b and the contact surface 14c of the insertion hole 14a are arranged in parallel.
Further, guided portions 13c and 13c parallel to the longitudinal direction of the tilling claw 13 base are formed at positions between the biting surfaces 13b and 13b at both ends of the tilling claw 13 base. The left and right widths of the protruding biting portions 13a and 13a are narrowly formed.
[0013]
In this way, in order to insert or remove the base of the tilling claw 13 from the holder 14, when the biting portions 13a and 13a of the base of the tilling claw 13 are aligned in the guide groove 14b of the insertion hole 14a, the biting portion The amount of protrusion to the left and right outside is reduced by the guided portion 13c in 13a, and the biting portion 13a is not interfered with in the guide groove 14b, and the tilling claw 13 base is smoothly inserted.
Then, the support pin 15 is inserted from the side of the holder 14 and penetrates the base of the tilling claw 13 so that the base of the tilling claw 13 is mounted with one touch.
[0014]
When the tilling claw 13 base is rotated in the insertion hole 14a around the support pin 15, the biting surface 13b comes into contact with the contact surface 14c as shown in FIGS. The left and right side surfaces of the holder 14 are bitten while spreading against the elastic force of the holder 14, and the contact surface 14c on the holder 14 side can bite the guided portion 13c in the center in addition to the biting surface 13b. Like the two-dot chain line shown in FIG. 8, the contact area with the contact surface 14c is increased, and even if the tilling claw 13 is driven at a low speed, the posture held by the bottom of the tilling claw 13 is not lost and is stable. Held.
[0015]
【The invention's effect】
Since the present invention is configured as described above, the following effects are exhibited.
The biting portion 13a constitutes the biting surfaces 13b and 13b at the front and rear positions on both sides in the longitudinal direction, and the center portion in the front and rear direction between the biting surfaces 13b and 13b is a guided portion 13c parallel to the longitudinal direction of the tilling nail. The taper angle of the biting surface 13b is formed at an angle θ with respect to the longitudinal direction, and the biting surface 13b and the contact surface 14c are parallel when the base of the tilling claw 13 is inserted into the insertion hole 14a. The length m in the longitudinal direction in plan view of the biting portion 13a is slightly shorter than the length L of the guide groove 14b of the insertion hole 14a, so that the flat guided object is positioned between the biting surfaces. In the guide groove formed at the center of the side surface of the insertion hole without biting the cultivating claw base into the contact surface when attaching or detaching the cultivating claw Bite into Parts By loosely fitted, eliminates possible to interfere biting portion into the insertion hole, it is possible to easily attach and detach the tilling claws.
[Brief description of the drawings]
FIG. 1 is a plan view of a rotary cultivating apparatus in which cultivating claws of the present invention are arranged.
FIG. 2 is a side view of a tilling claw.
FIG. 3 is also a plan view.
FIG. 4 is a side view of a holder for holding a tilling claw.
FIG. 5 is a plan view of the holder.
FIG. 6 is a plan view of a tilling nail base of the present invention.
FIG. 7 is a side cross-sectional view showing a tilling nail base inserted into a holder.
FIG. 8 is a partial plan view showing a tilling claw base inserted into a holder.
FIG. 9 is a side view showing a base of a conventional tillage nail.
FIG. 10 is a side cross-sectional view showing a conventional tillage claw base inserted into a holder.
FIG. 11 is a partial plan view showing a conventional tilling claw base inserted into a holder.
[Explanation of symbols]
A rotary tilling device 13 tilling claw 13a biting part 13b biting surface 13c guided part 14 holder 14a insertion hole 14b guide groove 14c contact surface

Claims (1)

耕耘爪軸12上に放射状にホルダー14を固設し、該ホルダー14に挿入孔14aを開口し、該挿入孔14aは平面視略菱形に形成され、該挿入孔14aの長手方向の左右側面の前後中央部に、左右側面を外側に凹状とするガイド溝14bを形成し、該ガイド溝14bに延設して前後に当接面14c・14cを形成し、
該ガイド溝14bは、平面視において前後方向の長さLとし、該ガイド溝14bに延設される当接面14cのテーパの角度は、挿入孔14aの長手方向を基準として角度θ内側に傾斜形成し、
耕耘爪13の基部に、平面視で長手方向に対して、左右の側面の前後方向中央部に食い込み部13aを構成し、該食い込み部13aを前記当接面14c・14cに食い込ませて耕耘爪を保持する構成において、
前記食い込み部13aは、長手方向の両側の前後位置に食い込み面13b・13bを構成し、食い込み面13b・13bの間の前後方向の中央部を、耕耘爪の長手方向と平行な被ガイド部13cに構成し、
前記食い込み面13bのテーパの角度は、長手方向を基準として角度θに形成し、耕耘爪13基部を挿入孔14aに挿入した際に、食い込み面13bと当接面14cとを平行状に構成し、
前記食い込み部13aの平面視における長手方向の長さmは、前記挿入孔14aのガイド溝14bの長さLより若干短く形成したことを特徴とする耕耘爪の保持構成。
The holder 14 is fixed radially on the tilling claw shaft 12, and the insertion hole 14a is opened in the holder 14. The insertion hole 14a is formed in a substantially rhombus in plan view, and is formed on the left and right side surfaces in the longitudinal direction of the insertion hole 14a. A guide groove 14b having a concave shape on the left and right side surfaces is formed in the front and rear central portion, and abutting surfaces 14c and 14c are formed on the front and rear by extending to the guide groove 14b.
The guide groove 14b has a length L in the front-rear direction in a plan view, and the taper angle of the contact surface 14c extending to the guide groove 14b is inclined inward by an angle θ with respect to the longitudinal direction of the insertion hole 14a. Forming,
A biting portion 13a is formed at the center of the front and rear direction of the left and right side surfaces in the longitudinal direction in the plan view on the base of the tilling claw 13, and the biting portion 13a is bitten into the contact surfaces 14c and 14c. In the configuration that holds
The biting portion 13a constitutes biting surfaces 13b and 13b at the front and rear positions on both sides in the longitudinal direction, and a center portion in the front and rear direction between the biting surfaces 13b and 13b is guided portion 13c parallel to the longitudinal direction of the tilling nail. To configure
The taper angle of the biting surface 13b is formed at an angle θ with respect to the longitudinal direction, and the biting surface 13b and the contact surface 14c are formed in parallel when the base of the tilling claw 13 is inserted into the insertion hole 14a. ,
The length n in the longitudinal direction of the biting portion 13a in plan view is slightly shorter than the length L of the guide groove 14b of the insertion hole 14a .
JP06860197A 1997-03-21 1997-03-21 Tillage claw holding configuration Expired - Fee Related JP3722581B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06860197A JP3722581B2 (en) 1997-03-21 1997-03-21 Tillage claw holding configuration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06860197A JP3722581B2 (en) 1997-03-21 1997-03-21 Tillage claw holding configuration

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JPH10262405A JPH10262405A (en) 1998-10-06
JP3722581B2 true JP3722581B2 (en) 2005-11-30

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Publication number Priority date Publication date Assignee Title
JP4505844B2 (en) * 2005-11-18 2010-07-21 通 山田 Tillage claw mounting structure

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