JPH07115823A - Mower - Google Patents
MowerInfo
- Publication number
- JPH07115823A JPH07115823A JP8304793A JP8304793A JPH07115823A JP H07115823 A JPH07115823 A JP H07115823A JP 8304793 A JP8304793 A JP 8304793A JP 8304793 A JP8304793 A JP 8304793A JP H07115823 A JPH07115823 A JP H07115823A
- Authority
- JP
- Japan
- Prior art keywords
- rotary
- shaft
- revolving
- rotary blade
- transmission case
- 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.)
- Granted
Links
Landscapes
- Harvester Elements (AREA)
Abstract
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
よって駆動する回転刃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 grass on the ground by a rotary 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27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, for example, like a brush cutter, a bearing body for axially supporting a rotary blade and an engine are connected by a connecting rod, and an operator holds a grip portion provided on the connecting rod with both hands. The grass was mowed with the rotating rotary blade. That is, in FIG. 4 and FIG. 5, the disk-shaped rotary blade 3 having the saw-shaped blade portion 1 on the outer periphery is axially supported by the bearing case 5, and is connected to the bearing case 5 via the connecting rod 7. Driven by the connecting rod 7
It is rotationally driven via a transmission shaft 11 passing through. A grip 13 and a handle 15 are provided in the middle of the connecting rod 7.
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 an upper end of the rotating shaft 21 is engaged with a tip of the transmission shaft 11 to form a bearing 25.
Is engaged with the bevel gear 27 that is axially supported by the bearing case 5. The lower end of the rotary shaft 21 is fitted with upper and lower washers 31 and 33 which engage with the splines 29 on the outer circumference.
A disk-shaped rotary blade 3 having a saw blade-shaped blade portion 1 on the outer periphery is sandwiched and fixed by a nut 35 at the lower end.
【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。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 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. In particular, conventional rotary blades have sharp blades with a serrated tip on the outer periphery and rotate at high speed, causing serious damage when touching the trunk of a plant or the like and causing a serious accident if it touches another person's leg. There was a risk of becoming.
【0005】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 may be reduced, but this has not been implemented because of the following problems.
【0006】(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わせて鋏のように切断
する必要がある。(1) When the speed is slowed down, it is impossible to cut with one rotary blade, and it is necessary to stack two rotary blades and cut them like scissors.
【0007】(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.
【0008】(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.
【0009】[0009]
【課題を解決するための手段】本発明は、重ね合わせた
2枚の回転刃を、それぞれ回転軸と、回転軸の外周に嵌
合する回転筒とに固着して設け、回転軸に平行のカム軸
から回転軸または回転筒を介してそれぞれの回転刃を互
いに反対方向に往復回動せしめる揺動装置を設けたもの
である。SUMMARY OF THE INVENTION According to the present invention, two rotary blades, which are superposed on each other, are fixed to a rotary shaft and a rotary cylinder fitted to the outer periphery of the rotary shaft, respectively, and are parallel to the rotary shaft. An oscillating device for reciprocally rotating the rotary blades in opposite directions from the cam shaft via the rotary shaft or the rotary cylinder is provided.
【0010】[0010]
【作用】反対方向にそれぞれ往復回動する2枚の回転刃
によって草等を鋏み切るが、回転速度を遅くして作業の
安全性を向上し、しかも草の巻き込みを防止することが
可能となり、また、揺動装置を伝動ケース内に収容し、
しかも回転軸と回転筒の軸封が容易で確実なため、伝動
ケース内の揺動装置に草片、塵埃が付着することがな
い。[Function] Although two grass blades are reciprocally rotated in opposite directions to scissor grass and the like, the rotation speed can be reduced to improve work safety and prevent grass from being caught. Also, the rocking device is housed in the transmission case,
Moreover, since the rotary shaft and the rotary cylinder are easily and reliably sealed, grass pieces and dust do not adhere to the rocking device in the transmission case.
【0011】[0011]
【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を備えた円板状の上,下
2枚の第2回転刃43,第1回転刃45が伝動ケース4
7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を介して互いに反対方向にそ
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、小ギヤー73に噛み
合う大ギヤー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8
1,83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
直方向の回転軸93がベアリング95,97を介して軸
支され、回転軸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
下方の第1回転刃45がボルト109によって固着され
ている。回転軸93の外周には回転筒111が回転自在
に嵌合し、回転筒111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。回転筒111の下端に一体に固着する支持板1
17には、第1回転刃45に重ね合わせた第2回転刃4
3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.
The disk-shaped upper and lower two second rotary blades 43 and the first rotary blade 45 having the blade portions 41 and 42 respectively on the outer periphery are the transmission case 4
By the drive of an engine 51 which is axially supported by being superposed on 7, and which is connected to a transmission case 47 via a connecting rod 49, it is reciprocally rotatable in opposite directions via a transmission shaft 53 penetrating the connecting rod 49. Has been. 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, and a large gear 79 meshing with a small gear 73 and two circular cam plates 81, 83 have a bearing ring 85 on the cam shaft 75. Fixed through. 2 cam plates 8
Numerals 1 and 83 are provided above and below the large gear 79, respectively, so as to be eccentrically arranged in symmetry with respect to the center of the cam shaft 75.
Connecting rods 89, 87 are provided on the outer periphery through bearing rings 85, 87, respectively.
One end of 91 is fitted. A vertical rotating shaft 93 is rotatably supported by the transmission case 47 via bearings 95 and 97, and an upper end of the rotating shaft 93 is integrally provided with the other end of the connecting rod 89 and an arm 101 pivotally attached by a pin 99. Stuck,
A support plate 105 that engages with the square shaft 103 formed at the lower end is fixed by a nut 107. The lower first rotary blade 45 is fixed to the support plate 105 with a bolt 109. An arm 113 that rotatably fits around the outer circumference of the rotary shaft 93 and that is integrally fixed to the rotary cylinder 111.
The other end of is connected to the other end of the connecting rod 91 by a pin 115. Support plate 1 integrally fixed to the lower end of the rotary cylinder 111
17 includes a second rotary blade 4 superposed on the first rotary blade 45.
3 is fixed by bolts 119.
【0012】第1揺動装置121は、カム板81、連結
杆89、アーム101よりなり、カム軸75から回転軸
93を介して、第1回転刃45を往復回動する。第2揺
動装置123はカム板83、連結杆91、アーム113
よりなり、カム軸75から回転筒111を介して第2回
転刃43を、第1回転刃45と反対方向に往復回動す
る。The first swinging device 121 comprises a cam plate 81, a connecting rod 89 and an arm 101, and reciprocally rotates the first rotary blade 45 from the cam shaft 75 via the rotary shaft 93. The second swinging device 123 includes a cam plate 83, a connecting rod 91, an arm 113.
Therefore, the second rotary blade 43 is reciprocally rotated from the cam shaft 75 via the rotary cylinder 111 in the opposite direction to the first rotary blade 45.
【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、小ギヤー73,大ギヤ
ー79を経てカム軸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
る回転刃43,45は相対的に往復回動運動を行い、刃
部41,42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、往復回動する回転
刃43,45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.
It is transmitted to the intermediate shaft 67 via 1 and rotates the cam shaft 75 via the small gear 73 and the large gear 79. 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 rotary blades 43 and 45 integrally fixed to the arms 101 and 113 relatively reciprocally rotate to cut grass or the like between the blade portions 41 and 42. An operator holds the grips 55 and 59 with both hands and cuts grass or the like with the rotary blades 43 and 45 that reciprocally rotate.
【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) 回転刃の低速回転が可能となり、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枚の回転刃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、能率的である。また複雑な形状の刈り込み
ができる。(4) 揺動装置を伝動ケース内に収容し、しか
も回転軸、回転筒の軸封が容易で確実なため、伝動ケー
ス内の揺動装置に草片、塵埃が付着して作動を妨げるこ
とがない。The present invention has the following effects because it has the structure as described in the claims.
(1) Since the rotary blade can rotate at low speed, there is no danger of splashing pebbles, etc. It is not important even if it comes into contact with a plant or the leg of another person. (2) Since it is cut between two rotary 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, it can be cut in any direction, and can be reciprocally mowed by shaking to the left and right like a brush cutter, which is efficient. In addition, it is possible to trim complicated shapes. (4) Since the rocking device is housed in the transmission case, and the rotary shaft and rotary cylinder are easily and reliably sealed, grass pieces and dust may adhere to the rocking device in the transmission case to prevent operation. There is no.
【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 第1回転刃 45 第2回転刃 47 伝動ケース 75 カム軸 93 回転軸 111 回転筒 121 第1揺動装置 123 第2揺動装置 43 1st rotary blade 45 2nd rotary blade 47 Transmission case 75 Cam shaft 93 Rotating shaft 111 Rotating cylinder 121 First rocking device 123 Second rocking device
Claims (1)
93と、前記第1回転刃45に摺動自在に重ね合せた第
2回転刃43を端部に固着し、前記回転軸93の外周に
回動自在に嵌合する回転筒111とを伝動ケース47に
軸支し、前記回転軸93と平行方向に並設したカム軸7
5から前記回転軸93を介して前記第1回転刃45を往
復回動せしめる第1揺動装置121と、前記カム軸75
から前記回転筒111を介して前記第2回転刃43を前
記第1回転刃45と反対方向に往復回動せしめる第2揺
動装置123とを前記伝動ケース47内に設けたことを
特徴とする草刈装置。1. A rotary shaft 93 for fixing a first rotary blade 45 to an end thereof, and a second rotary blade 43 slidably superposed on the first rotary blade 45 for fixed to an end thereof. A cam barrel 7 rotatably fitted to the outer periphery of 93 is pivotally supported on the transmission case 47, and is arranged in parallel with the rotary shaft 93.
5, a first swinging device 121 for reciprocally rotating the first rotary blade 45 via the rotary shaft 93, and the cam shaft 75.
A second swinging device 123 for reciprocally rotating the second rotary blade 43 in the opposite direction to the first rotary blade 45 via the rotary cylinder 111 is provided in the transmission case 47. Mowing equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8304793A JPH0811012B2 (en) | 1993-04-09 | 1993-04-09 | Mowing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8304793A JPH0811012B2 (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 |
---|---|
JPH07115823A true JPH07115823A (en) | 1995-05-09 |
JPH0811012B2 JPH0811012B2 (en) | 1996-02-07 |
Family
ID=13791294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8304793A Expired - Fee Related JPH0811012B2 (en) | 1993-04-09 | 1993-04-09 | Mowing equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0811012B2 (en) |
-
1993
- 1993-04-09 JP JP8304793A patent/JPH0811012B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0811012B2 (en) | 1996-02-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |