JPH02219513A - Lawn mower - Google Patents
Lawn mowerInfo
- Publication number
- JPH02219513A JPH02219513A JP4018989A JP4018989A JPH02219513A JP H02219513 A JPH02219513 A JP H02219513A JP 4018989 A JP4018989 A JP 4018989A JP 4018989 A JP4018989 A JP 4018989A JP H02219513 A JPH02219513 A JP H02219513A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle body
- cutting blade
- blade
- front wheel
- support
- 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
- 238000005520 cutting process Methods 0.000 claims abstract description 98
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000004904 shortening Methods 0.000 abstract 1
- 244000025254 Cannabis sativa Species 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004577 thatch Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Harvester Elements (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、動力で走行する芝刈機に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a lawnmower that runs on power.
従来のこの種の芝刈機においては、刈刃（通常、回転刃
と、この回転刃にすり合わされる受は刃との組み合わせ
からなる）は、動力走行を行うためのエンジンおよび動
力伝達機構を搭載する車体に支持されていた。In conventional lawn mowers of this type, the cutting blade (usually consisting of a combination of a rotating blade and a blade that is rubbed against the rotating blade) is equipped with an engine and a power transmission mechanism for power running. It was supported by the vehicle body.
芝刈機による芝の刈高は、刈刃と地表面との間の間隔に
よって決まる。したがって、地表面が完全に平らならば
、前記従来の芝刈機においても、車体に対する刈刃の位
置を一定に維持しさえすれば、前記刈刃と地表面との間
隔は常に変らないので、芝の刈り高は常に均一になる。The cutting height of a lawn mower is determined by the distance between the cutting blade and the ground surface. Therefore, if the ground surface is completely flat, even in the conventional lawn mower, as long as the position of the cutting blade with respect to the vehicle body is maintained constant, the distance between the cutting blade and the ground surface will not change at all times. The cutting height is always uniform.
ところが、実際には、地表面には凹凸があり、この凹凸
が車体の前輪と後輪との間隔との関係において小さい場
合には、刈刃と地表面との間隔が変化し、刈高は変化し
てしまう。すなわち、地表面の凹凸により、地表面のう
ちの刈刃の直下の部分が、前輪および後輪に対する共通
接平面より高い位置に来たり、低い位置に来たりすると
、刈刃と地表面との間隔が変化し、刈高は変化してしま
う。However, in reality, the ground surface has irregularities, and if these irregularities are small in relation to the distance between the front and rear wheels of the vehicle body, the distance between the cutting blade and the ground surface changes, and the cutting height increases. It will change. In other words, if the part of the ground directly below the cutting blade comes to a higher or lower position than the common tangential plane to the front and rear wheels due to unevenness of the ground surface, the contact between the cutting blade and the ground surface becomes The spacing changes, and the cutting height changes.
したがって、車体の前輪と後輪との間隔をなるべく小さ
くすれば、地表面のより小さい凹凸に対しても芝の刈高
を均一にできる。Therefore, if the distance between the front wheels and the rear wheels of the vehicle body is made as small as possible, the mowing height of the lawn can be made uniform even with respect to smaller irregularities on the ground surface.
ところが、動力で走行する芝刈機においては、車体を動
力走行させるための動力源および動力伝達機構を車体に
搭載する必要があるため、実際には、車体の全長はある
限度以上短くすることはできず、ひいては車体の前輪と
後輪との間隔もある限度以上短くすることはできない。However, in a lawn mower that runs on power, it is necessary to mount a power source and a power transmission mechanism on the vehicle body to make the vehicle run on power, so in reality, the overall length of the vehicle body cannot be shortened beyond a certain limit. Furthermore, the distance between the front and rear wheels of the vehicle cannot be made shorter than a certain limit.
このため、前記のように刈刃が車体に支持されていた従
来の芝刈機では、地表面に小さい凹凸がある場所では芝
の刈高を均一にできないという欠点があった。For this reason, conventional lawn mowers in which the cutting blade is supported by the vehicle body as described above have the disadvantage that the mowing height of the lawn cannot be made uniform in areas where there are small irregularities on the ground surface.
本発明は、前記従来の欠点を解決するためになされたも
ので、地表面に小さい凹凸がある場所でも芝の刈高を均
一にできる芝刈機を提供することを目的とする。The present invention was made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a lawn mower that can make the mowing height of the lawn uniform even in places where the ground surface has small irregularities.
本発明による芝刈り機は、車体と、この車体を支持して
接地する車体側車輪と、前記車体に搭載され、前記車体
側車輪の一部または全部を駆動する動力源および動力伝
達機構と、前記車体に、−定範囲内において上下動可能
かつ左右に傾斜可能に連結された刈刃支持体と、この刈
刃支持体を支持して接地する刈刃支持体側前輪および後
輪と、前記刈刃支持体に支持された刈刃とを有してなる
ものである。The lawn mower according to the present invention includes a vehicle body, vehicle body wheels that support the vehicle body and are in contact with the ground, and a power source and power transmission mechanism that are mounted on the vehicle body and drive part or all of the vehicle body wheels. - a cutting blade support connected to the vehicle body so as to be movable up and down and tiltable left and right within a certain range; front and rear wheels on the side of the cutting blade support that support the cutting blade support and make contact with the ground; The cutting blade is supported by a blade support.
本発明においては、刈刃を支持する刈刃支持体には車体
を動力走行させるための動力源や動力伝達機構を搭載し
ないため、刈刃支持体の全長、ひいては刈刃側前輪軸と
刈刃側後輪軸との間隔を短くすることができる。したが
って、より小さな凹凸がある場所においても、刈刃と地
表面との間隔を一定に維持し、芝の刈高を均一にするこ
とができる。In the present invention, since the cutting blade support that supports the cutting blade is not equipped with a power source or power transmission mechanism for driving the vehicle body, the entire length of the cutting blade support, and even the front wheel shaft on the cutting blade side and the cutting blade. The distance from the side rear wheel axle can be shortened. Therefore, even in areas with smaller irregularities, the distance between the cutting blade and the ground surface can be maintained constant, and the mowing height of the lawn can be made uniform.
以下、本発明を図面に示す実施例に基づいて説明する。 Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
第１図から１１図までは、本発明の一実施例を示す。こ
の実施例において、車体１は、車体後部１ａと、この車
体後部１ａに着脱自在に固定される車体前部１ｂとから
なる。前記車体前部１ｂは、主として、左右方向に延び
るバイブ状の直線部２と、この直線部２の左右両端部か
らそれぞれ前方・斜め下方に延びる円弧状部３とからな
る。第５図および６図によく示されるように、前記車体
前部１ｂの直線部２の中央部には前後方向に延びる連結
筒４が固定されており、この連結筒４にはビン穴５が上
下方向に貫通されている。前記車体後部１ａの前部中央
部には、前方に向かって突出する連結棒６が固定されて
おり、この連結棒６の先端側には前側ビン穴７および後
側ビン穴８がそれぞれ上下方向に貫通されている。そし
て、連結筒４のピン穴５を連結棒６の前側ビン穴７また
は後側ビン穴８のいずれか一方に合致させ（後述する回
転ブラシ９またはサッチング用の垂直刃１０を芝刈機に
装着しない場合はピン穴５を後側ピン穴８に合致させ、
装着する場合はピン穴６を前側ビン穴７に合致させる）
、これらのピン穴にビン１１を挿通することにより車体
前部１ｂを車体後部ｌａに固定できるようになっている
。1 to 11 show an embodiment of the present invention. In this embodiment, the vehicle body 1 consists of a vehicle rear portion 1a and a vehicle front portion 1b which is detachably fixed to the vehicle body rear portion 1a. The vehicle body front portion 1b mainly includes a vibrator-shaped straight portion 2 extending in the left-right direction, and arcuate portions 3 extending forward and diagonally downward from both left and right ends of the straight portion 2, respectively. As clearly shown in FIGS. 5 and 6, a connecting tube 4 extending in the longitudinal direction is fixed to the center of the straight portion 2 of the front portion 1b of the vehicle body, and a bottle hole 5 is provided in the connecting tube 4. It is penetrated in the vertical direction. A connecting rod 6 that protrudes forward is fixed to the front central part of the rear portion 1a of the vehicle body, and a front bottle hole 7 and a rear bottle hole 8 are provided at the tip side of the connecting rod 6 in the vertical direction, respectively. is penetrated by. Then, align the pin hole 5 of the connecting tube 4 with either the front pin hole 7 or the rear pin hole 8 of the connecting rod 6 (do not attach the rotary brush 9 or the vertical blade 10 for thatching, which will be described later, to the lawn mower). If so, align pin hole 5 with rear pin hole 8,
When installing, align pin hole 6 with front bottle hole 7)
By inserting the pin 11 into these pin holes, the front portion 1b of the vehicle body can be fixed to the rear portion la of the vehicle body.
前記車体後部１ａの後部には、第３図等に示されるよう
に、車体側左後輪軸１２および右後輪軸１３が設けられ
ており、これらの後輪軸１２．１３は車体後部１ａに搭
載されたエンジン１４により、図示しないクラッチおよ
び差動装置１５を含む車体後部１ａに搭載された動力伝
達機構（内部機構等の詳細は図示していない）を介して
駆動されるようになっている。そして、左後輪軸１２お
よび右後輪軸１３にはそれぞれローラ状の車体側左後輪
１６および右後輪１７が設けられている。As shown in FIG. 3, etc., a left rear wheel shaft 12 and a right rear wheel shaft 13 on the vehicle body side are provided at the rear of the vehicle rear portion 1a. The vehicle is driven by an engine 14 via a power transmission mechanism (details such as internal mechanisms are not shown) mounted on the rear part 1a of the vehicle body, including a clutch and a differential gear 15 (not shown). The left rear wheel shaft 12 and the right rear wheel shaft 13 are provided with a roller-shaped left rear wheel 16 and a right rear wheel 17, respectively, on the vehicle body side.
前記車体後部１ａの後部にはハンドル１８が取り付けら
れている。A handle 18 is attached to the rear portion of the vehicle body rear portion 1a.
前記車体前部１ｂの左右の円弧状部３の下端部間には車
体側前輪軸１９が取り付けられており、この前輪軸１９
には一本のローラ状の車体側前輪２０が回転可能に支持
されている。A vehicle body side front wheel axle 19 is attached between the lower ends of the left and right circular arc portions 3 of the vehicle front portion 1b.
A single roller-shaped front wheel 20 on the vehicle body side is rotatably supported.
２１は刈刃支持体であり、この刈刃支持体２１は次のよ
うにして車体側前輪２０と車体側後輪１６．１７との間
において車体１に連結されている。21 is a cutting blade support body, and this cutting blade support body 21 is connected to the vehicle body 1 between the vehicle body side front wheel 20 and the vehicle body side rear wheel 16, 17 in the following manner.
前記車体後部１ａの前部中央部には、連結棒６の下方に
おいて前方に向かって突出する支持棒２２が固定されて
いる。他方、刈刃支持体２１の上部にはＵ字状の嵌合部
材２３が、そのＵ字を上下逆向きにした状態で固定され
ている。この嵌合部材２３は支持棒２２に緩く嵌合され
ており、これにより刈刃支持体２１は一定範囲内におい
て車体１に対し昇降可能かつ支持棒２２を中心としてあ
らゆる方向に回動可能とされている。A support rod 22 that protrudes forward below the connecting rod 6 is fixed to the front central portion of the rear portion 1a of the vehicle body. On the other hand, a U-shaped fitting member 23 is fixed to the upper part of the cutting blade support 21 with the U-shape turned upside down. This fitting member 23 is loosely fitted to the support rod 22, so that the cutting blade support 21 can be raised and lowered relative to the vehicle body 1 within a certain range and can be rotated in all directions around the support rod 22. ing.
前記刈刃支持体２１の左前部および右前部には、第２図
および４図によく示されるように、支持板２４を介して
それぞれ刈刃側前輪支持部材２５が昇降可能に支持され
ており、これらの前輪支持部材２５の下端部間には刈刃
側前輪軸４１が取り付けられており、この刈刃側前輪軸
４１には一本のローラ状の刈刃側前輪２６が回転可能に
支持されている。前記刈刃側前輪支持部材２５の上端部
には、つまみ受は部２７が一体的に設けられており、こ
のつまみ受は部２７には、刈高調整つまみ２８が、該つ
まみ受は部２７に対し回転可能かつ昇降不可能に嵌合さ
れている。そして、前記刈高調整つまみ２８は、下端部
を刈刃支持体２１に固定された上下方向に延びるネジ棒
２９に螺合されている。As clearly shown in FIGS. 2 and 4, cutting blade side front wheel support members 25 are supported on the left and right front portions of the cutting blade support body 21 via support plates 24 so as to be movable up and down, respectively. A cutting blade side front wheel shaft 41 is attached between the lower ends of these front wheel support members 25, and a single roller-shaped cutting blade side front wheel 26 is rotatably supported on this cutting blade side front wheel shaft 41. has been done. A knob receiver section 27 is integrally provided at the upper end of the front wheel support member 25 on the cutting blade side. It is fitted in such a way that it can rotate and cannot be moved up or down. The cutting height adjustment knob 28 has a lower end screwed into a threaded rod 29 fixed to the cutting blade support 21 and extending in the vertical direction.
したがって、刈高調整つまみ２８を回転すると、固定さ
れたネジ棒２９に沿って刈刃側前輪支持部材２５が刈高
調整つまみ２８とともに刈刃支持体２１に対し昇降し、
刈刃支持体２１と刈刃側前輪２６との間隔、ひいては刈
刃支持体２１と地表面３０との間隔が調整される。また
、前記刈刃支持体２１には、上述のようにして刈高調整
つまみ２８の回転により所望の位置に昇降された刈刃側
前輪支持部材２５を締め付けて刈刃支持体２１に強固に
固定できるロック機構３１が設けられている。Therefore, when the cutting height adjustment knob 28 is rotated, the cutting blade side front wheel support member 25 moves up and down with the cutting height adjustment knob 28 relative to the cutting blade support 21 along the fixed threaded rod 29.
The distance between the cutting blade support 21 and the cutting blade side front wheel 26, and further the distance between the cutting blade support 21 and the ground surface 30, is adjusted. Further, the cutting blade side front wheel support member 25, which has been raised and lowered to a desired position by rotating the cutting height adjustment knob 28 as described above, is firmly fixed to the cutting blade support 21 by tightening it. A locking mechanism 31 is provided.
前記刈刃支持体２１の後端部には刈刃側後輪軸３２が取
り付けられており、この刈刃側後輪軸３２には左右一対
の刈刃側後輪３３が回転可能に支持されている。また、
前記刈刃支持体２１には、螺旋状に曲げられた刃物を適
当枚数組み合せてなる回転刃３４が回転可能に支持され
ている。また、前記刈刃支持体２１には、第２図に示さ
れるように、回転刃３４の周囲を囲むようにして回転刃
カバー３５が設けられている。A cutting blade side rear wheel shaft 32 is attached to the rear end of the cutting blade support 21, and a pair of left and right cutting blade side rear wheels 33 are rotatably supported on this cutting blade side rear wheel shaft 32. . Also,
A rotary blade 34 formed by combining an appropriate number of spirally bent blades is rotatably supported on the cutting blade support 21. Further, as shown in FIG. 2, the cutting blade support 21 is provided with a rotary blade cover 35 so as to surround the rotary blade 34.
また、前記刈刃支持体２１には、本実施例において前記
回転刃３４とともに刈刃を構成する受は刃３６が刈刃側
後輪軸３２と同軸に回動可能に支持されている。前記受
は刃３６は図示しないバネにより第２図において反時計
方向に付勢されている。前記刈刃支持体２１の左右両端
部にはハンドル筒３７が回転可能かつ軸方向に移動不可
能に支持されており、このハンドル筒３７の内周面には
雌ネジ（図示せず）が設けられている。前記雌ネジには
ネジ棒３８が螺合されており、このネジ棒３Ｂの下端部
は受は刃３６の左右両端部に、該ネジ棒３８の軸回りに
回転不可能な状態で係合されている。したがって、各ハ
ンドル筒３７の上端部付近に装着された受は力調整ハン
ドル３９により各ハンドル筒３７を回転すると、各ネジ
棒３８が軸方向に移動して受は刃３６が回動され、回転
刃３４とのすり合わせを調整できる。Further, on the cutting blade support 21, a receiving blade 36, which constitutes a cutting blade together with the rotary blade 34 in this embodiment, is rotatably supported coaxially with the cutting blade side rear wheel shaft 32. The blade 36 of the receiver is biased counterclockwise in FIG. 2 by a spring (not shown). A handle tube 37 is rotatably supported at both left and right ends of the cutting blade support 21 but not movable in the axial direction, and a female thread (not shown) is provided on the inner peripheral surface of the handle tube 37. It is being A threaded rod 38 is screwed into the female thread, and the lower end of this threaded rod 3B is engaged with both left and right ends of the blade 36 in a state that it cannot rotate around the axis of the threaded rod 38. ing. Therefore, when each handle tube 37 is rotated by the force adjustment handle 39, each threaded rod 38 moves in the axial direction, and the blade 36 of the receiver is rotated. Grinding with the blade 34 can be adjusted.
前記車体側前輪軸１９の左右の端部はそれぞれ両端部が
ユニバーサルジヨイントを構成する連結具４０を介して
刈刃側前輪軸４１の左右の端部に連結されている。前記
連結具４０は、第７図および８図に示されるように、棒
体、４２と、圧縮コイルバネ４３と、カバー４４と、Ｃ
リング４５と、ナツト４６と、棒体４７と、圧縮コイル
バネ４Ｂと、カバー４９と、Ｃリング５０とからなって
いる。前記棒体４２の前端部付近には球面状の凹部５１
が設けられており、該棒体４２の後端部付近には段部５
２が設けられている。前記バネ４３は棒体４２に嵌合さ
れてその後端部を段部５２に当接されるようになってい
る。前記カバー４４は切り割り５３を設けられたスリー
ブ状をなしており、棒体４２に嵌合され、その後端部を
バネ４３の前端部に当接されるようになっている。前記
棒体４２の前端部にはＣリング４５が取り付けられてお
り、カバー４４はバネ４３によりこのＣリング４５に向
って付勢されている。The left and right ends of the front wheel shaft 19 on the vehicle body side are respectively connected to the left and right ends of the front wheel shaft 41 on the cutting blade side via a coupling device 40 that constitutes a universal joint. As shown in FIGS. 7 and 8, the connector 40 includes a rod 42, a compression coil spring 43, a cover 44, and a C
It consists of a ring 45, a nut 46, a rod 47, a compression coil spring 4B, a cover 49, and a C ring 50. A spherical recess 51 is provided near the front end of the rod 42.
is provided, and a stepped portion 5 is provided near the rear end of the rod 42.
2 is provided. The spring 43 is fitted onto the rod 42 and its rear end is brought into contact with the stepped portion 52 . The cover 44 has a sleeve shape with a cutout 53, is fitted onto the rod 42, and its rear end is brought into contact with the front end of the spring 43. A C-ring 45 is attached to the front end of the rod 42, and the cover 44 is biased toward the C-ring 45 by a spring 43.
第７図に示されるように、前記車体側前輪軸１９の両端
部はそれぞれ球状とされており、この球状部１９ａの根
元には細い首部１９ｂが形成されている。前記車体側前
輪軸１９の球状部１９ａは、力／（−＝４４を第７図の
矢印入方向に手で押しくこのとき、バネ４３は圧縮され
る）、該カバー４４を凹部５１を覆わない位置に移動さ
せた状態で凹部５１内に挿入される。その後、手を離さ
れると、カバー４４は、バネ４３の力によりＣリング４
５に当接する位置に戻り、凹部５１を覆い、球状部１９
ａを凹部５１から離脱できなくする（このとき、切り割
り５３は車体側前輪軸１９の首部１９ｂに嵌合される）
。このような車体側前輪軸１９と棒体４２との結合部は
１つのユニバーサルジヨイントを構成する。As shown in FIG. 7, both ends of the vehicle-side front wheel shaft 19 are each spherical, and a narrow neck 19b is formed at the base of the spherical portion 19a. The spherical portion 19a of the front wheel axle 19 on the vehicle body side causes the cover 44 to cover the concave portion 51 by applying a force/(-=44 when pushed by hand in the direction of the arrow in FIG. 7, the spring 43 is compressed). It is inserted into the recess 51 in a state where it has been moved to a position where it is not in use. After that, when the hand is released, the cover 44 is moved to the C ring 4 by the force of the spring 43.
5, covers the concave portion 51, and presses the spherical portion 19.
a cannot be removed from the recess 51 (at this time, the cut 53 is fitted into the neck 19b of the front wheel axle 19 on the vehicle body side).
. The connecting portion between the vehicle body side front wheel shaft 19 and the rod 42 constitutes one universal joint.
前記棒体４７の前端部側には雄ネジ部５６が設けられて
おり、この雄ネジ部５６は棒体４２に同軸状態で螺合さ
れている。そして、雄ネジ部５６を棒体４２に対して回
転し、雄ネジ部５６と棒体４２との螺合長さを変えるこ
とにより連結具４０の全長を調整できるようになってい
る。なお、ナツト４６は、前記螺合長さが調整された後
、締め付けられることにより、該螺合長さを固定するも
のである。A male threaded portion 56 is provided on the front end side of the rod 47, and this male threaded portion 56 is screwed coaxially with the rod 42. The overall length of the connector 40 can be adjusted by rotating the male threaded portion 56 relative to the rod 42 and changing the threaded length between the male threaded portion 56 and the rod 42. Note that the nut 46 is tightened after the screwing length is adjusted to fix the screwing length.
前記棒体４７の雄ネジ部５６の根元付近には段部５８が
設けられており、該棒体４７の後端部付近には球面状の
凹部５９が設けられている。前記バネ４８は棒体４７に
嵌合されてその前端部を段部５８に当接されるようにな
っている。前記カバー４９は切り割り６ｏを設けられた
スリーブ状をなしており、棒体４７に嵌合され、その前
端部をバネ４８の後端部に当接されるようになっている
。A stepped portion 58 is provided near the root of the male threaded portion 56 of the rod 47, and a spherical recess 59 is provided near the rear end of the rod 47. The spring 48 is fitted into the rod 47 and its front end is brought into contact with the stepped portion 58 . The cover 49 has a sleeve shape with a cut 6o, is fitted onto the rod 47, and has its front end brought into contact with the rear end of the spring 48.
前記棒体４７の後端部にはＣリング５ｏが取り付けられ
ており、カバー４９はバネ４８によりこのＣリング５０
に向って付勢されている。A C-ring 5o is attached to the rear end of the rod 47, and the cover 49 is attached to this C-ring 50 by a spring 48.
is biased towards.
前記刈刃側前輪軸４１の両端部は車体側前輪軸１９の場
合と同様にそれぞれ球状とされており、この球状部４１
ａの根元には細い首部４１ｂが形成されている。前記刈
刃側前輪軸°４１の球状部４１ａは、車体側前輪軸１９
の球状部１９ａの場合と同様にして凹部５９内に挿入さ
れる。このような刈刃側前輪軸４１と棒体４７との結合
部は１つのユニバーサルジヨイントを構成する。Both ends of the cutting blade side front wheel axle 41 are respectively spherical as in the case of the vehicle body side front wheel axle 19, and this spherical portion 41
A thin neck portion 41b is formed at the base of a. The spherical portion 41a of the cutting blade side front wheel shaft 41 is connected to the vehicle body side front wheel shaft 19.
It is inserted into the recess 59 in the same manner as the spherical part 19a. Such a joint between the cutting blade side front wheel shaft 41 and the rod body 47 constitutes one universal joint.
以上のように刈刃支持体２１は、嵌合部材２３、連結棒
２２および連結具４ｏを介して車体１に連係されること
により、車体１に対して一定範囲内において上下動可能
かつ左右に傾斜可能とされている。As described above, the cutting blade support 21 is linked to the vehicle body 1 via the fitting member 23, the connecting rod 22, and the connector 4o, so that it can move vertically and horizontally within a certain range with respect to the vehicle body 1. It is said to be tiltable.
前記回転刃３４の軸３４ａは刈刃支持体２１に設けられ
たベルト伝動袋Ｆ１６１（内部機構は図示せず）の出力
軸６２に接続されている。他方、前記ベルト伝動装置の
入力軸６３（第９図参照）はユニバーサルジヨイント６
４および差動装置１５の入力軸６５（第３図参照）を介
してエンジン１４に接続されている。The shaft 34a of the rotary blade 34 is connected to an output shaft 62 of a belt transmission bag F161 (internal mechanism not shown) provided on the cutting blade support 21. On the other hand, the input shaft 63 (see FIG. 9) of the belt transmission device is connected to the universal joint 6.
4 and the input shaft 65 of the differential gear 15 (see FIG. 3).
前記ハンドル１８には、エンジン１４の回転数を調節す
るアクセルレバ−６６、エンジン１４と回転刃３４との
間に介在された前記クラッチ（図示せず）をオン、オフ
するクラッチレバ−６７、および車体側後輪１６．１７
を制動するブレーキ（図示せず）を操作するためのブレ
ーキレバー６８が取り付けられている。The handle 18 includes an accelerator lever 66 for adjusting the rotation speed of the engine 14, a clutch lever 67 for turning on and off the clutch (not shown) interposed between the engine 14 and the rotary blade 34, and Body side rear wheel 16.17
A brake lever 68 is attached to operate a brake (not shown) for braking.
前記車体前部１ｂの左右両端部にはそれぞれ斜め上方に
突出する突出部６９が設けられており、これらの突出部
６９は、刈り屑収容容器Ｔｏ（第２図および１１図にの
み図示）の両側面に設けられた差し込み部７１に差し込
まれており、これにより、刈り屑収容容器７０は車体前
部１ｂに固定されている。Protrusions 69 that protrude diagonally upward are provided at both left and right ends of the front portion 1b of the vehicle body, and these protrusions 69 are connected to the cutting waste container To (shown only in FIGS. 2 and 11). It is inserted into insertion portions 71 provided on both sides, thereby fixing the cuttings storage container 70 to the front portion 1b of the vehicle body.
次に、本実施例の作動を説明する。Next, the operation of this embodiment will be explained.
エンジン１４により、車体１に搭載された差動装置１５
等を含む前記動力伝達機構を介して車体側後輪１６．１
７を第２図における矢印Ｂ方向に駆動回転すると、この
芝刈機は地表面３ｏ上を前進する。この際、運転者は、
車体１の後方においてハンドル１８を掴んで車体１の進
行方向を制御しながら、車体１に追従して歩いて行く。Differential device 15 mounted on vehicle body 1 by engine 14
The vehicle body side rear wheel 16.1 is connected to the rear wheel 16.1 via the power transmission mechanism including the
When the lawn mower 7 is driven and rotated in the direction of arrow B in FIG. 2, this lawn mower moves forward on the ground surface 3o. At this time, the driver
The user grasps the handle 18 at the rear of the vehicle body 1 and walks following the vehicle body 1 while controlling the direction of travel of the vehicle body 1.
上述のようにして車体１が前進すると、連結具４０を介
して車体側前輪軸１９に引張られることにより、刈刃支
持体２１も、刈刃側前輪２６および後輪３３を転勤させ
ながら車体１とともに前進して行く。When the vehicle body 1 moves forward as described above, the cutting blade support 21 is pulled by the vehicle body side front wheel shaft 19 via the connector 40, and the cutting blade support body 21 also moves the vehicle body 1 while transferring the cutting blade side front wheels 26 and rear wheels 33. We will move forward together.
そして、芝刈りを行いたい場合には、エンジン１４によ
りユニバーサルジヨイント６４（第９図参照）および刈
刃支持体２１に搭載されたベルト伝動装置６１を介して
回転刃３４を第２図における矢印Ｃ方向に駆動回転させ
る。すると、回転刃３４と受は刃３６とのすり合わせに
より、芝が切られ、芝が刈られて行く。When it is desired to mow the lawn, the rotary blade 34 is moved by the engine 14 via the universal joint 64 (see FIG. 9) and the belt transmission device 61 mounted on the cutting blade support 21 as shown in the arrow in FIG. Drive and rotate in direction C. Then, the rotary blade 34 and the receiver rub against the blade 36 to cut the grass.
また、このようにして芝が刈られることによって生じた
刈り屑は、回転刃３４の回転により飛ばされ、回転刃カ
バー３５に案内されて刈り屑収容容器７０内に収容され
る。Further, the cuttings generated by mowing the lawn in this manner are blown away by the rotation of the rotary blade 34, guided by the rotary blade cover 35, and stored in the cuttings storage container 70.
ここにおいて、この芝刈機では、刈刃支持体２１が車体
１に対して上下動可能であるとともに左右に傾斜可能な
ことにより、刈刃支持体２１は地表面３０の凹凸に応じ
て車体１とは独立に上下動および左右傾斜を行う。そし
て、刈刃支持体２１には車体１駆動のためのエンジン１
４や動力伝達機構が搭載されないので、刈刃支持体２１
の全長、ひいては刈刃側前輪軸２６と刈刃側後輪軸３３
との間隔を短くすることができる。したがって、地表面
に小さい凹凸がある場所でも芝の刈高を均一にできる。Here, in this lawn mower, the cutting blade support 21 is movable up and down with respect to the vehicle body 1 and can be tilted from side to side, so that the cutting blade support 21 moves with respect to the vehicle body 1 according to the unevenness of the ground surface 30. independently moves up and down and tilts left and right. An engine 1 for driving the vehicle body 1 is mounted on the cutting blade support 21.
4 and a power transmission mechanism are not installed, the cutting blade support 21
The overall length of the cutting blade side front wheel shaft 26 and the cutting blade side rear wheel shaft 33
The distance between the two can be shortened. Therefore, the mowing height of the lawn can be made uniform even in places where the ground surface has small irregularities.
なお、芝の刈高は、前述のように刈高調整つまみ２８を
回転し、刈刃支持体２１と地表面３０との間隔、ひいて
は回転刃３４および受は刃３６と地表面３０との間隔を
変化することにより調整することができる。The mowing height of the lawn can be adjusted by rotating the cutting height adjustment knob 28 as described above, and adjusting the distance between the cutting blade support 21 and the ground surface 30, and the distance between the rotary blade 34 and the blade 36 and the ground surface 30. It can be adjusted by changing.
また、本実施例では、芝刈りを行う場所まで芝刈機を移
動する際には、車体側後輪１６．１７より大径のタイヤ
７１を車体側後輪軸１２．１３に取り付け、車体側後輪
１６．１７の代りにこれらのタイヤ７１（第１図におい
て二点鎖線で示されている）が地表面３０に接する状態
とするとともに、エンジン１４により車体側後輪軸１２
．１３を介してタイヤ７１を駆動回転することにより、
この芝刈機を速やかに移動できる。In addition, in this embodiment, when moving the lawnmower to the place where the lawn is mowed, tires 71 having a larger diameter than the rear wheels 16.17 on the vehicle body are attached to the rear wheel axles 12.13 on the vehicle body, and Instead of tires 16 and 17, these tires 71 (indicated by two-dot chain lines in FIG.
．． By driving and rotating the tire 71 via 13,
You can move this lawn mower quickly.
また、芝を刈る方法には、大別して、地表面３０と平行
（水平）に刈る水平刈りと、地表面３０と垂直に刈る垂
直刈りとがある。そして、通常は前者の水平刈りが主と
して行われ、前記回転刃３４と受は刃３６との組み合わ
せによる芝刈りも水平刈りである。Furthermore, methods for mowing the lawn can be roughly divided into horizontal mowing, in which the grass is mowed parallel to (horizontally) the ground surface 30, and vertical mowing, in which the grass is mowed perpendicularly to the ground surface 30. Normally, the former type of horizontal mowing is mainly performed, and lawn mowing by the combination of the rotary blade 34 and the receiver blade 36 is also horizontal mowing.
しかし、芝が密生しすぎたり、長いまま横にねている葉
があったり、茎葉が低く横に生え広がったり、地表面３
０にサッチ（枯れた芝や刈り屑等を主とする有機物残渣
）が蓄積したりすると、°芝の生育に悪い影響を与える
ので、後者の垂直刈りも適当な頬度で行う必要がある。However, if the grass grows too densely, if some leaves lie horizontally for a long time, if the stems and leaves grow low and spread horizontally, or if the grass grows too low and spreads horizontally,
If thatch (organic residue mainly consisting of dead grass and clippings) accumulates on the grass, it will have a negative effect on the growth of the grass, so vertical mowing of the latter also needs to be done at an appropriate degree of depth.
第１０図は、このような垂直刈りを行う目的で刈刃支持
体２１に垂直刃７３を装着した状態を示す。この場合は
、垂直刃７３を装着するスペースを設けるために、連結
筒４のピン穴５を連結棒６の前側ピン穴７に合致させ、
これらのピン穴５゜７にピン１１を挿通することにより
、車体側前輪２０と回転刃３４との間隔を若干長くした
状態で、車体前部１ｂを車体後部１ａに固定する。また
、前記刈刃支持体２１の左右両端部に回動部材７４を回
転刃軸３４ａと同軸に回動可能に支持する。FIG. 10 shows a state in which a vertical blade 73 is attached to the cutting blade support 21 for the purpose of performing such vertical cutting. In this case, in order to provide a space for mounting the vertical blade 73, the pin hole 5 of the connecting tube 4 is aligned with the front pin hole 7 of the connecting rod 6,
By inserting the pins 11 into these pin holes 5.degree.7, the front portion 1b of the vehicle body is fixed to the rear portion 1a of the vehicle body while the distance between the front wheel 20 on the vehicle body side and the rotary blade 34 is slightly lengthened. Further, a rotary member 74 is rotatably supported at both left and right ends of the cutting blade support 21 coaxially with the rotary blade shaft 34a.
これらの回動部材７４間には、垂直刃軸７５が回転可能
に支持されており、この垂直刃軸７５は歯車７６．７７
．７８および７９を介して回転刃軸３４ａに連係されて
いる。なお、前記歯車７８と７９は所望に応じてその噛
み合いを解除できるようになっている。前記垂直刃軸７
５には、放射状に延びる適当数の刃先を有する多数の垂
直刃１０が、図示しないスペーサにより互いに適当な間
隔を置かれた状態で、垂直刃軸７５と垂直方向に取り付
けられている。A vertical blade shaft 75 is rotatably supported between these rotating members 74, and this vertical blade shaft 75 is connected to gears 76, 77.
．． It is linked to the rotary blade shaft 34a via 78 and 79. Note that the gears 78 and 79 can be disengaged from each other as desired. The vertical blade shaft 7
A large number of vertical blades 10 having a suitable number of radially extending cutting edges are attached to the vertical blade shaft 75 in a direction perpendicular to the vertical blade shaft 75 with appropriate spacing from each other by spacers (not shown).
また、支持板２４の代りに支持板８０を刈刃支持体２１
に取り付ける。これらの支持板８０には垂直刃１０を装
着しないときの支持板２４の場合と同様にして、それぞ
れ刈刃側前輪支持部材２５が昇降可能に支持され、これ
らの前輪支持部材２５の下端部間には一本のローラ状の
刈刃側前輪２６が回転可能に支持される。さらに、前記
支持板８０には、つまみ受は部８１が一体的に設けられ
ており、このつまみ受は部８１には、垂直刃高調整つま
み８２が、車体１に対し斜め上下方向に、回転可能かつ
軸方向に移動不可能に嵌合されている。この垂直刃高調
整つまみ８２はネジ棒８３に螺合されており、このネジ
棒８３は、その下端部を回動部材７４に、垂直刃軸７５
と平行な軸回りに回動可能に支持されている。Also, the support plate 80 is used instead of the support plate 24 on the cutting blade support 21.
Attach to. In the same way as the support plate 24 when the vertical blade 10 is not mounted, the cutting blade side front wheel support members 25 are supported on these support plates 80 so as to be movable up and down, and between the lower ends of these front wheel support members 25. A single roller-shaped front wheel 26 on the cutting blade side is rotatably supported. Further, the support plate 80 is integrally provided with a knob holder part 81, and a vertical blade height adjustment knob 82 is provided in the knob holder part 81 so that the knob holder part 81 can be rotated diagonally up and down with respect to the vehicle body 1. axially and non-movably fitted. This vertical blade height adjustment knob 82 is screwed into a threaded rod 83, and the lower end of this threaded rod 83 is connected to the rotating member 74, and the vertical blade shaft 75 is connected to the vertical blade height adjusting knob 82.
It is rotatably supported around an axis parallel to the
したがって、垂直刃高調整つまみ８２を回転すると、ネ
ジ棒８３が軸方向に移動し、回動部材７４を回動させる
ので、垂直刃１０の高さが調整される。なお、前記回動
部材７４とネジ棒８３との回動結合部には、該結合部を
締め付けて固定することにより、回動部材７４の回動位
置、ひいては垂直刃１０の高さを固定するためのロック
機構８４が設けられている。Therefore, when the vertical blade height adjustment knob 82 is rotated, the threaded rod 83 moves in the axial direction and rotates the rotating member 74, so that the height of the vertical blade 10 is adjusted. In addition, by tightening and fixing the joint portion between the rotary member 74 and the threaded rod 83, the rotation position of the rotary member 74 and, by extension, the height of the vertical blade 10 are fixed. A locking mechanism 84 is provided for this purpose.
本実施例では、回転刃軸３４ａから歯車７９゜７８．７
？、７６および垂直刃軸７５を介して動力が伝達され、
垂直刃１０が第１０図の矢印り方向に回転されることに
より、前記垂直刈りが行われ、長いまま横に寝ている葉
や、低い横に生え広がった茎葉を切断するとともに、地
表面３０に蓄積されたサッチをかき出すことができる。In this embodiment, the gear is 79 degrees 78.7 degrees from the rotary blade shaft 34a.
? , 76 and the vertical blade shaft 75,
The vertical cutting is performed by rotating the vertical blade 10 in the direction of the arrow in FIG. It is possible to scrape out thatch that has accumulated in the can.
また、本実施例では、垂直刃軸７５の代りに、回動部材
７４に第１１図に示すような回転ブラシ９を取り付ける
ことができる。このような回転ブラシ９を取り付けた場
合には、もちろん前記垂直刈りは行われないが、車体側
および刈刃側前輪２０．２６で押さえつけられた芝が、
これらの前輪と逆回転する回転ブラシ９によりかき立て
られ、かつ、このかき立てられた芝が直ちに回転刃３４
および受刃３６により切断されるので、水平刈りが良好
に行われ、かつ芝目も調整される。Further, in this embodiment, instead of the vertical blade shaft 75, a rotating brush 9 as shown in FIG. 11 can be attached to the rotating member 74. When such a rotating brush 9 is installed, of course the vertical mowing is not performed, but the grass pressed down by the front wheels 20 and 26 on the vehicle body side and the cutting blade side is
The grass is stirred up by the rotary brush 9 that rotates in the opposite direction to these front wheels, and this stirred up grass is immediately transferred to the rotary blade 34.
Since the grass is cut by the receiving blade 36, horizontal mowing is performed well and the grain of the grass is also adjusted.
以上のように本発明による芝刈機は、地表面に小さい凹
凸がある場所でも芝の刈高を均一にできるという優れた
効果を得られるものである。As described above, the lawn mower according to the present invention has the excellent effect of making the mowing height of the lawn uniform even in places where the ground surface has small irregularities.
第１図は本発明による芝刈機の一実施例を示す斜視図、
第２図は前記実施例を示す側面図、第３図は前記実施例
における車体後部側部分を示す斜視図、第４図は前記実
施例における刈刃支持体側部分を示す斜視図、第５図お
よび第６図は前記実施例における車体前部と車体後部と
の結合部を示す斜視図、第７図は前記実施例における車
体側前輪軸と刈刃側前輪軸との連結部を示す斜視図、第
８図は該連結部に使用された連結具を示す分解斜視図、
第９図は前記実施例において車体側と刈刃支持体側との
間の動力伝達を行うユニバーサルジヨイント部を示す斜
視図、第１０図は前記実施例において垂直刃を装着した
状態における車体前部および刈刃支持体側部分を示す側
面図、第１１図は前記実施例において回転ブラシを装着
した状態における車体前部および刈刃支持体側部分を示
す側面図である。
１・・・車体、１４・・・エンジン、１５・・・差動装
置、１６・・・車体側左後輪、１７・・・車体側右後輪
、２０・・・車体側前輪、２１・・・刈刃支持体、２２
・・・支持棒、２３・・・嵌合部材、２６・・・刈刃側
前輪、３３・・・刈刃側後輪、３４・・・回転刃、３６
・・・受は刃。
特許出願人 株式会社 土屋機械製作所代理人 弁
理士 大森 泉
第５
図
第７
図FIG. 1 is a perspective view showing an embodiment of a lawn mower according to the present invention;
FIG. 2 is a side view showing the embodiment, FIG. 3 is a perspective view showing the rear part of the vehicle body in the embodiment, FIG. 4 is a perspective view showing the cutting blade support side part in the embodiment, and FIG. FIG. 6 is a perspective view showing the joint between the front part of the vehicle body and the rear part of the vehicle body in the above embodiment, and FIG. 7 is a perspective view showing the joint part between the front wheel shaft on the vehicle body side and the front wheel shaft on the cutting blade side in the above embodiment. , FIG. 8 is an exploded perspective view showing a connector used in the connector,
FIG. 9 is a perspective view showing the universal joint portion that transmits power between the vehicle body side and the cutting blade support body side in the above embodiment, and FIG. 10 is a front view of the vehicle body in the state in which the vertical blade is attached in the above embodiment. FIG. 11 is a side view showing the front part of the vehicle body and the part on the cutting blade support side in a state in which the rotating brush is attached in the above embodiment. DESCRIPTION OF SYMBOLS 1... Vehicle body, 14... Engine, 15... Differential device, 16... Left rear wheel on the vehicle body side, 17... Right rear wheel on the vehicle body side, 20... Front wheel on the vehicle body side, 21. ...Cutter blade support, 22
... Support rod, 23 ... Fitting member, 26 ... Front wheel on the cutting blade side, 33 ... Rear wheel on the cutting blade side, 34 ... Rotating blade, 36
...Uke is a blade. Patent applicant Tsuchiya Machinery Co., Ltd. Representative Patent attorney Izumi Omori Figure 5 Figure 7
Claims (1)
、前記車体に搭載され、前記車体側車輪の一部または全
部を駆動する動力源および動力伝達機構と、前記車体に
、一定範囲内において上下動可能かつ左右に傾斜可能に
連結された刈刃支持体と、この刈刃支持体を支持して接
地する刈刃支持体側前輪および後輪と、前記刈刃支持体
に支持された刈刃とを有してなる芝刈機。1. A vehicle body, a vehicle body side wheel that supports the vehicle body and makes contact with the ground, a power source and a power transmission mechanism that are mounted on the vehicle body and drive part or all of the vehicle body side wheels, and a fixed range of the vehicle body. A cutting blade support body connected to the blade support body so as to be vertically movable and tiltable from side to side, a front wheel and a rear wheel on the side of the cutting blade support side that support this cutting blade support body and are in contact with the ground, and a blade support body supported by the cutting blade support body. A lawn mower comprising a cutting blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1040189A JPH0620379B2 (en) | 1989-02-22 | 1989-02-22 | Lawn mower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1040189A JPH0620379B2 (en) | 1989-02-22 | 1989-02-22 | Lawn mower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02219513A true JPH02219513A (en) | 1990-09-03 |
| JPH0620379B2 JPH0620379B2 (en) | 1994-03-23 |
Family
ID=12573832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1040189A Expired - Fee Related JPH0620379B2 (en) | 1989-02-22 | 1989-02-22 | Lawn mower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0620379B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007018205A1 (en) * | 2005-08-11 | 2007-02-15 | Kyoeisha Co., Ltd. | Lawn mower and roller unit for wiping droplet |
| JP2009039049A (en) * | 2007-08-09 | 2009-02-26 | Toko Sangyo Kk | Lawn mower |
| JP2010057446A (en) * | 2008-09-05 | 2010-03-18 | Ihi Shibaura Machinery Corp | Power transmission mechanism for walking lawn mower |
| JP2013150566A (en) * | 2012-01-25 | 2013-08-08 | Ryobi Ltd | Lawn mower |
| JP2013176347A (en) * | 2012-02-07 | 2013-09-09 | Ihi Shibaura Machinery Corp | Reel lawn mower |
| GB2611933A (en) * | 2018-11-09 | 2023-04-19 | The Toro Co | Walk reel mower with a telescopic floating handle assembly having interchangeable handles, in situ backlapping, a traction bail, and interchangeable reel |
| US12016266B2 (en) | 2021-06-28 | 2024-06-25 | The Toro Company | Walk reel mower with handle assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6274515U (en) * | 1985-10-29 | 1987-05-13 |
-
1989
- 1989-02-22 JP JP1040189A patent/JPH0620379B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6274515U (en) * | 1985-10-29 | 1987-05-13 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007018205A1 (en) * | 2005-08-11 | 2007-02-15 | Kyoeisha Co., Ltd. | Lawn mower and roller unit for wiping droplet |
| JP2009039049A (en) * | 2007-08-09 | 2009-02-26 | Toko Sangyo Kk | Lawn mower |
| JP2010057446A (en) * | 2008-09-05 | 2010-03-18 | Ihi Shibaura Machinery Corp | Power transmission mechanism for walking lawn mower |
| JP2013150566A (en) * | 2012-01-25 | 2013-08-08 | Ryobi Ltd | Lawn mower |
| JP2013176347A (en) * | 2012-02-07 | 2013-09-09 | Ihi Shibaura Machinery Corp | Reel lawn mower |
| JP2013176348A (en) * | 2012-02-07 | 2013-09-09 | Ihi Shibaura Machinery Corp | Lawn mower |
| GB2611933A (en) * | 2018-11-09 | 2023-04-19 | The Toro Co | Walk reel mower with a telescopic floating handle assembly having interchangeable handles, in situ backlapping, a traction bail, and interchangeable reel |
| GB2611933B (en) * | 2018-11-09 | 2023-08-09 | The Toro Co | Walk reel mower with a telescopic floating handle assembly having interchangeable handles, in situ backlapping, a traction bail, and interchangeable reel |
| US11771000B2 (en) | 2018-11-09 | 2023-10-03 | The Toro Company | Walk reel mower with common mount |
| US12016266B2 (en) | 2021-06-28 | 2024-06-25 | The Toro Company | Walk reel mower with handle assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0620379B2 (en) | 1994-03-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |