JP2521023B2 - Mowing equipment - Google Patents
Mowing equipmentInfo
- Publication number
- JP2521023B2 JP2521023B2 JP5083056A JP8305693A JP2521023B2 JP 2521023 B2 JP2521023 B2 JP 2521023B2 JP 5083056 A JP5083056 A JP 5083056A JP 8305693 A JP8305693 A JP 8305693A JP 2521023 B2 JP2521023 B2 JP 2521023B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- blade
- blades
- shaft
- connecting rod
- 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
Links
Landscapes
- Harvester Elements (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、エンジン等の原動機に
よって駆動する円盤形刃物により地上の草等を刈り払う
等の草刈り作業を行うための草刈装置に係るものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing device for performing mowing work such as mowing off grass on the ground with a disc-shaped blade driven by a prime mover such as an engine.
【0002】[0002]
【従来の技術】従来の草刈装置は、たとえば刈払機のよ
うに、回転刃を軸支する軸受体と、エンジンとを連結杆
によって連結し、作業者はこの連結杆に設けた握り部を
両手で把持して、回転する回転刃によって地上の草等を
刈り払う草刈り作業を行なっていた。すなわち、図4、
図5において、外周に鋸状の刃部1を備えた円板状の回
転刃3は、軸受ケース5に軸支され、連結杆7を介して
軸受ケース5と連結するエンジン9の駆動により、連結
杆7を貫通する伝動軸11を介して回転駆動される。連
結杆7の途中には、握り部13とハンドル15が設けら
れ、ハンドル15には握り部17が固着している。軸受
ケース5内にはベアリング19を介して回転軸21が垂
直方向に軸支され、回転軸21の上端に固着するベベル
ギヤー23は、伝動軸11の先端に係合してベアリング
25によって軸受ケース5に軸支されたベベルギヤー2
7と噛み合っている。回転軸21の下端は外周のスプラ
イン29に係合する上下のワッシャー31,33によっ
て、外周に鋸刃状刃部1を備えた円板状の回転刃3が挟
持され下端のナット35によって固定されている。2. Description of the Related Art In a conventional mowing device, such as a brush cutter, a bearing body for pivotally supporting a rotary blade and an engine are connected by a connecting rod, and an operator holds a grip provided on the connecting rod with both hands. The grass was mowed with the rotating rotary blade. That is, in FIG.
In FIG. 5, a disk-shaped rotary blade 3 having a saw-shaped blade portion 1 on its outer periphery is axially supported by a bearing case 5, and is driven by an engine 9 that is connected to the bearing case 5 via a connecting rod 7. It is rotationally driven via a transmission shaft 11 penetrating the connecting rod 7. A grip 13 and a handle 15 are provided in the middle of the connecting rod 7, and a grip 17 is fixed to the handle 15. A rotating shaft 21 is vertically supported in the bearing case 5 via a bearing 19, and a bevel gear 23 fixed to the upper end of the rotating shaft 21 is engaged with the tip of the transmission shaft 11 by a bearing 25. Bevel gear 2 supported by
It meshes with 7. The lower end of the rotary shaft 21 is clamped by the upper and lower washers 31 and 33 engaging with the spline 29 on the outer periphery, and the disc-shaped rotary blade 3 having the saw blade-shaped blade portion 1 on the outer periphery is clamped and fixed by the nut 35 on the lower end. ing.
【0003】作業者は、握り部13,17を両手で把持
してエンジン9の駆動で高速に回転する回転刃3によっ
て地上の草等を刈り払う草刈り作業を行なうものであ
る。An operator carries out a mowing operation in which the grips 13 and 17 are held by both hands and the rotary blade 3 which is rotated at high speed by driving the engine 9 cuts off grass and the like on the ground.
【0004】[0004]
【発明が解決しようとする課題】この場合、回転刃3は
高速で回転するので、小石等を跳ねとばして危険であ
り、またやわらかい草を刈るときは、遠心風によって吹
き倒されて刈ることができず、刈り残しの原因となって
いた。In this case, since the rotary blade 3 rotates at a high speed, it is dangerous to bounce off small stones or the like, and when cutting soft grass, it may be blown down by the centrifugal wind and mowed. I could not do it, and it was a cause of uncut.
【0005】とくに、従来の回転刃は外周に鋸状の先端
が鋭利の刃部が形成され、高速で回転するため、植木等
の幹に触れると大きな傷を生じ、万一他人の脚に触れる
と大事故となる危険があった。In particular, since the conventional rotary blade has a sharp blade portion with a serrated tip on the outer periphery and rotates at a high speed, it causes a large scratch when touching the trunk of a plant or the like, and touches the leg of another person. There was a danger of a big accident.
【0006】この危険をなくすためには、回転速度を低
速にすればよいが、このためには、つぎのような問題が
あって実施されていなかった。In order to eliminate this danger, the rotation speed should be reduced, but this has not been implemented because of the following problems.
【0007】(1) 速度を遅くすると1枚の回転刃では切
断できず、2枚の回転刃を重ね合せて鋏のように切断す
る必要がある。(1) When the speed is slowed down, one rotary blade cannot cut, and it is necessary to overlap two rotary blades and cut them like scissors.
【0008】(2) 2枚の回転刃の一方を固定すると、固
定刃の先端が小枝等につきあたって、回転刃全体を押し
進めることができず、小枝が刃の間に進入しないので切
断できない。(2) When one of the two rotary blades is fixed, the tip of the fixed blade hits a twig or the like, and the entire rotary blade cannot be pushed forward, and the twig does not enter between the blades, so cutting cannot be performed.
【0009】(3) 2枚の回転刃を互いに反対方向にそれ
ぞれ回転させれば刃先が小枝につきあたることがなく、
したがって回転刃の押し進めが阻害されることはなくな
るが、遅い速度で回転刃が回転するので遠心力が小さく
なって回転刃に草が巻き付き、除去が厄介となる。(3) If the two rotary blades are rotated in mutually opposite directions, the blade tip will not hit the twigs,
Therefore, the pushing of the rotary blade is not obstructed, but the rotary blade rotates at a slow speed, the centrifugal force is reduced, and the grass is wrapped around the rotary blade, which makes removal difficult.
【0010】[0010]
【課題を解決するための手段】本発明は、エンジン等の
原動機の動力が動力伝達系路を介して伝達される伝動ケ
ース47に、刃部41,42を円周上に並んで備えた2
枚の円盤形刃物43,45を同軸心に重ね合わせて前記
動力にて相対的に往復回動するように軸支して設けると
ともに、前記動力伝達系路中に動力の速度を低減する減
速機構を介在させて設けたものである。According to the present invention, there is provided a transmission case 47, to which power of a prime mover such as an engine is transmitted via a power transmission path, provided with blade portions 41 and 42 arranged side by side on a circumference.
A deceleration mechanism in which a plurality of disc-shaped blades 43 and 45 are superposed coaxially and are axially supported so as to be relatively reciprocally rotated by the power, and the speed of the power is reduced in the power transmission path. Is provided by interposing.
【0011】[0011]
【作用】反対方向にそれぞれ往復回動する2枚の円盤形
刃物によって草等を鋏み切るが、回転速度を遅くしてあ
るので作業の安全性が向上し、しかも草片の巻き込みを
防止することが可能となる。[Action] Two disc-shaped blades, which rotate back and forth in opposite directions, scissor grass and the like, but the rotation speed is slowed to improve work safety and prevent grass from being caught. Is possible.
【0012】[0012]
【実施例】以下、図面により本発明の一実施例について
詳細な説明を行なう。すなわち、図1〜図3において、
外周にそれぞれ刃部41,42を並んで備えた円板状
(円盤形)の上,下2枚の刃物43,45が伝動ケース
47に重ね合わせて軸支され、連結杆49を介して伝動
ケース47と連結するエンジン51の駆動により、連結
杆49を貫通する伝動軸53を介して互に反対方向にそ
れぞれ往復回動自在に設けられている。連結杆49の途
中には、握り部55とハンドル57が設けられ、ハンド
ル57には握り部59が固着している。伝動ケース47
には連結杆49の一端が傾斜して固着され、連結杆49
の内部を貫通する伝動軸53の先端の角軸61は、ベア
リング63を介して伝動ケース47に軸支されたベベル
ギヤー65に係合している。伝動ケース47には垂直方
向に中間軸67がベアリング69,69を介して軸支さ
れている。中間軸67の上部には、ベベルギヤー65に
係合するベベルギヤー71が固着している。中間軸67
の下部には小ギヤー73が固着している。伝動ケース4
7には垂直方向のカム軸75がベアリング77,77に
よって軸支され、カム軸75には、減速機構として小ギ
ヤー73に噛み合って動力回転を減速するための大ギヤ
ー79と、2個の円形のカム板81,83が軸受環85
を介して固着されている。2個のカム板81,83はそ
れぞれ大ギヤー79の上方、下方位置にカム軸75の中
心に対して対称位置に偏心して並設され、外周にそれぞ
れ軸受環85,87を介して連結杆89,91の一端が
嵌合している。また伝動ケース47には垂直方向の回動
軸93がベアリング95,97を介して軸支され、回動
軸93の上端には、連結杆89の他端とピン99によっ
て枢着するアーム101が一体に固着し、下端に形成し
た角軸103に係合する支持板105がナット107に
よって固定されている。支持板105には下方の刃物4
5がボルト109によって固着されている。回動軸93
の外周には回動筒111が回動自在に嵌合し、回動筒1
11に一体に固着するアーム113の他端はピン115
によって連結杆91の他端が枢着している。回動筒11
1の下端に一体に固着する支持板117には、刃物45
に重ね合わせた刃物43がボルト119によって固着さ
れている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. That is, in FIGS.
Two upper and lower disc-shaped (disc-shaped) blades 43 and 45, which are provided with the blade portions 41 and 42 side by side on the outer periphery, are axially supported by being superposed on a transmission case 47, and are transmitted through a connecting rod 49. When the engine 51 connected to the case 47 is driven, they are reciprocally rotatable in opposite directions via a transmission shaft 53 penetrating the connecting rod 49. A grip 55 and a handle 57 are provided in the middle of the connecting rod 49, and a grip 59 is fixed to the handle 57. Transmission case 47
One end of the connecting rod 49 is inclined and fixed to the connecting rod 49.
An angular shaft 61 at the tip of the transmission shaft 53 penetrating the inside of the shaft is engaged with a bevel gear 65 pivotally supported by the transmission case 47 via a bearing 63. An intermediate shaft 67 is vertically supported by the transmission case 47 via bearings 69, 69. A bevel gear 71 that engages with the bevel gear 65 is fixed to the upper portion of the intermediate shaft 67. Intermediate shaft 67
A small gear 73 is fixed to the lower part of the. Transmission case 4
7, a vertical cam shaft 75 is supported by bearings 77, 77. The cam shaft 75 has a large gear 79 for meshing with a small gear 73 as a reduction mechanism to reduce power rotation, and two circular circles. The cam plates 81 and 83 of the bearing ring 85
Is fixed through. The two cam plates 81 and 83 are provided above and below the large gear 79, respectively, so as to be eccentrically and eccentrically with respect to the center of the cam shaft 75. , 91 are fitted at one end. Further, a vertical rotating shaft 93 is rotatably supported by the transmission case 47 via bearings 95 and 97, and an arm 101 pivotally attached to the other end of the connecting rod 89 and a pin 99 is provided at the upper end of the rotating shaft 93. A support plate 105 that is integrally fixed and that engages with a square shaft 103 formed at the lower end is fixed by a nut 107. The support plate 105 has a lower blade 4
5 is fixed by bolts 109. Rotating shaft 93
A rotary cylinder 111 is rotatably fitted to the outer periphery of the rotary cylinder 1
The other end of the arm 113 integrally fixed to 11 is a pin 115.
The other end of the connecting rod 91 is pivotally attached by. Rotating cylinder 11
The support plate 117 integrally fixed to the lower end of the blade 1 has a blade 45
The blade 43 overlapped with is fixed by a bolt 119.
【0013】以上の実施例において、エンジン51を回
転すると、動力は伝動軸53からベベルギヤー65,7
1を経て中間軸67に伝達され、減速機構としての小ギ
ヤー73,大ギヤー79を経てエンジン動力速度が低減
されてカム軸75を回転させる。カム軸75の回転にと
もなって、2個のカム板81,83が互いに対称位置を
保持しつつ回転するので、連結杆89,91を介してア
ーム101,113を互いに反対方向に揺動させる。し
たがってアーム101,113と一体的に固着する刃物
43,45は相対的に往復回動運動を行ない、刃部4
1,42の間で草等を切断するものである。作業者は握
り部55,59を両手で把持し、往復回動する刃物4
3,45によって草等を切断するものである。In the above embodiment, when the engine 51 is rotated, power is transmitted from the transmission shaft 53 to the bevel gears 65 and 7.
1 is transmitted to the intermediate shaft 67, and the engine power speed is reduced via the small gear 73 and the large gear 79 as a reduction mechanism to rotate the cam shaft 75. With the rotation of the cam shaft 75, the two cam plates 81 and 83 rotate while maintaining symmetrical positions with each other, so that the arms 101 and 113 are swung in opposite directions via the connecting rods 89 and 91. Therefore, the blades 43 and 45 integrally fixed to the arms 101 and 113 relatively reciprocally rotate, and the blade 4
The grass is cut between 1, 42. The operator holds the grips 55 and 59 with both hands and reciprocally rotates the blade 4.
The grass is cut by 3,45.
【0014】[0014]
【発明の効果】本発明は請求の範囲に記載のとおりの構
成であるから、つぎのような効果を有するものである。
(1)動力伝達系路中に動力の速度を低減する減速機構
を介在せしめているので円盤形刃物の低速回動が可能と
なり、小石等をはねとばす危険がなく、植木、他人の脚
に接触しても大事に至らない。(2)2枚の刃物の間で
切断するので、切れ味がよく、やわらかい草でも切断で
き、刈り残しを生じない。(3)しかも、刃部が円盤状
に並んでいるので、どの方向でも切断でき、刈払機のよ
うに左右に振って往復草刈りができ、また複雑な形状の
刈り込みができる。The present invention has the following effects because it has the structure as described in the claims.
(1) Since a speed reducing mechanism for reducing the power speed is interposed in the power transmission system path, it is possible to rotate the disc-shaped blade at low speed, without the risk of splashing pebbles, etc. Even if they come into contact with each other, it will not be important. (2) Since it cuts between two blades, it has good sharpness and can cut soft grass without leaving uncut residue. (3) Moreover, since the blades are arranged in a disk shape, the blades can be cut in any direction, can be swung right and left like a brush cutter to perform reciprocating grass cutting, and can also cut a complicated shape.
【0015】なお、本発明は、前述の実施例では、伝動
ケースは連結杆を介してエンジンに連結しているが、連
結杆を廃して、伝動ケースとエンジン等の原動機とを直
接一体的に接続し、コンパクトに形成して庭木等の刈り
込みに用いてもよい。According to the present invention, the transmission case is connected to the engine through the connecting rod in the above-described embodiment, but the connecting rod is eliminated and the transmitting case and the prime mover such as the engine are directly integrated. You may connect and form compactly, and may be used for trimming garden trees.
【図1】本発明の一実施例の斜視説明図。FIG. 1 is an explanatory perspective view of an embodiment of the present invention.
【図2】要部の平断面図。FIG. 2 is a plan sectional view of a main part.
【図3】図2のIII −III 線の展開側断面図。FIG. 3 is a developed side sectional view taken along line III-III in FIG.
【図4】従来例の斜視説明図。FIG. 4 is a perspective explanatory view of a conventional example.
【図5】同要部の側断面図。FIG. 5 is a side sectional view of the main part.
43,45 円盤形刃物 47 伝動ケース 51 エンジン 43,45 Disc-shaped blade 47 Transmission case 51 Engine
Claims (1)
路を介して伝達される伝動機構を伝動ケース47に内蔵
するように設け、前記伝動ケース47に、刃部41,4
2を円周上に並んで備えた2枚の円盤形刃物43,45
を同軸心に重ね合わせて前記動力にて同軸心回りに反対
方向にそれぞれ往復回動するように軸支して設けるとと
もに、前記伝動機構中に動力の速度を低減する減速機構
を介在させて設けたことを特徴とする草刈装置。1. A transmission mechanism for transmitting the power of a prime mover such as an engine via a power transmission path is provided in the transmission case 47, and the blades 41, 4 are provided in the transmission case 47.
Two disc-shaped blades 43, 45 equipped with 2 arranged side by side on the circumference
And are coaxially supported by the power so as to reciprocally rotate around the coaxial center in the opposite directions by the power, and a speed reducing mechanism for reducing the power speed is provided in the transmission mechanism. A mowing device characterized in that
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5083056A JP2521023B2 (en) | 1993-04-09 | 1993-04-09 | Mowing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5083056A JP2521023B2 (en) | 1993-04-09 | 1993-04-09 | Mowing equipment |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61198226A Division JPH0815408B2 (en) | 1986-08-26 | 1986-08-26 | Mowing equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07107837A JPH07107837A (en) | 1995-04-25 |
JP2521023B2 true JP2521023B2 (en) | 1996-07-31 |
Family
ID=13791542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5083056A Expired - Fee Related JP2521023B2 (en) | 1993-04-09 | 1993-04-09 | Mowing equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2521023B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100408941B1 (en) * | 2001-10-05 | 2003-12-11 | 김광호 | A driving part strure for an eradicator |
CN107950172A (en) * | 2018-01-11 | 2018-04-24 | 山东农业大学 | A kind of bidirectional rotation cutterhead shear |
EP3927140A1 (en) | 2019-02-19 | 2021-12-29 | Husqvarna Ab | Reciprocating mower unit, system, and methods |
CN111264169B (en) * | 2020-03-31 | 2021-04-06 | 重庆森澜园林有限公司 | Weeding device of afforestation maintenance usefulness |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5142842U (en) * | 1974-09-20 | 1976-03-30 |
-
1993
- 1993-04-09 JP JP5083056A patent/JP2521023B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07107837A (en) | 1995-04-25 |
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