JP5139743B2 - Walking mower - Google Patents

Walking mower Download PDF

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JP5139743B2
JP5139743B2 JP2007204676A JP2007204676A JP5139743B2 JP 5139743 B2 JP5139743 B2 JP 5139743B2 JP 2007204676 A JP2007204676 A JP 2007204676A JP 2007204676 A JP2007204676 A JP 2007204676A JP 5139743 B2 JP5139743 B2 JP 5139743B2
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cutting blade
transmission
cutting
engine
machine body
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JP2009038986A (en
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義人 出井
正彦 林
秀夫 吉井
晃志 黒見
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Kubota Corp
Saito Agricultural Machinery Co Ltd
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Kubota Corp
Saito Agricultural Machinery Co Ltd
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Priority to JP2007204676A priority Critical patent/JP5139743B2/en
Priority to CN2008101454379A priority patent/CN101361428B/en
Priority to KR1020080076272A priority patent/KR100974379B1/en
Priority to TW097129683A priority patent/TWI353817B/en
Publication of JP2009038986A publication Critical patent/JP2009038986A/en
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Description

本発明は、走行機体に原動部を備え、原動部の下部に刈刃を上下軸心周りに回動自在に連結してある歩行型草刈機に関する。   The present invention relates to a walking type mower having a driving unit provided on a traveling machine body and having a cutting blade connected to a lower part of the driving unit so as to be rotatable around a vertical axis.

従来の技術としては、例えば特許文献1に開示されているように、走行車輪(特許文献1の図1の4)を備えた走行機体にエンジン(特許文献1の図1の5)を搭載し、このエンジンからの動力により回動する刈刃(特許文献1の図1の2)を備えた歩行型草刈機が知られている。   As a conventional technique, for example, as disclosed in Patent Document 1, an engine (5 in FIG. 1 of Patent Document 1) is mounted on a traveling machine body having traveling wheels (4 in FIG. 1 of Patent Document 1). A walking type mower having a cutting blade (2 in FIG. 1 of Patent Document 1) that rotates by power from the engine is known.

特開2007−53991号公報(図1,図2,図5,図7及び段落番号「0042」の記載参照)Japanese Unexamined Patent Publication No. 2007-53991 (see FIG. 1, FIG. 2, FIG. 5, FIG. 7 and the description of paragraph number “0042”)

特許文献1の歩行型草刈機では、刈高さ調節レバー(特許文献1の図2の74)に連係された操作支軸(特許文献1の図7の72)に、スリーブ(特許文献1の図5の70)に係合されたシフトフォーク(特許文献1の図5の73)を連結し、シフトフォークを上下に揺動することでスリーブを刈刃軸(特許文献1の図5の30)と共にスライド上下動させ、刈刃を上下にスライド移動させて、草の刈高さを調節できるように構成されている。   In the walking type mower of Patent Document 1, an operation support shaft (72 of FIG. 7 of Patent Document 1) linked to a cutting height adjustment lever (74 of FIG. 2 of Patent Document 1) is connected to a sleeve (Patent Document 1 of FIG. 2). The shift fork (73 of FIG. 5 of Patent Document 1) engaged with 70) of FIG. 5 is connected, and the sleeve is cut by the vertical movement of the shift fork up and down (30 of FIG. 5 of Patent Document 1). ) And the slide blade is moved up and down to adjust the cutting height of the grass.

その結果、刈刃を上下にスライド移動させる機構や、刈高さ調節レバーによりシフトフォークを上下に揺動操作する機構の部品点数が増え構造が複雑になって、歩行型草刈機の重量が重くなるといった問題や、歩行型草刈機の製造コストが高騰するといった問題があった。
本発明は、草の刈高さを変更調節する機構を簡素化し、歩行型草刈機の軽量化及び低コスト化を実現することを目的とする。
As a result, the number of parts of the mechanism that slides the cutting blade up and down and the mechanism that swings the shift fork up and down by the cutting height adjustment lever increases the number of parts, making the structure complicated, and the weight of the walking mower increases. There are problems such as, and the manufacturing cost of the walking mower increases.
An object of the present invention is to simplify a mechanism for changing and adjusting the cutting height of grass, and to realize a reduction in weight and cost of a walking mower.

[I]
(構成)
本発明の第1特徴は、走行機体に原動部を備え、前記原動部の下部に刈刃を上下軸心周りに回動自在に連結してある歩行型草刈機において、次のように構成することにある。
前記刈刃の前側が下方に揺動した前下がり傾斜姿勢となるように、かつ前記刈刃の後側が下方に揺動した後下がり傾斜姿勢となるように、前記原動部を左右軸心周りで前記走行機体に支持すると共に、
前記原動部及び刈刃を一体で前記左右軸心周りに姿勢変更することにより、前記前下がり傾斜姿勢での前記刈刃の前下がり傾斜角度及び前記後下がり傾斜姿勢での前記刈刃の後下がり傾斜角度を変更自在に構成し、
走行機体側と原動部側の一方に設けた長さが異なる複数の長穴、及び前記複数の長穴に択一的に移動自在に連係する状態で走行機体側と原動部側の他方に設けた連係部材を備えて、刈高さ調節機構を構成する。
[I]
(Constitution)
A first feature of the present invention is a walking type mower having a driving unit in a traveling machine body, and a cutting blade connected to a lower part of the driving unit so as to be rotatable around a vertical axis. There is.
The driving unit is arranged around the left and right axis so that the front side of the cutting blade swings downward and swings downward and the rear side of the cutting blade swings downward and tilts downward. While supporting the traveling machine body,
By changing the posture of the driving unit and the cutting blade integrally around the left and right axial centers, the cutting blade has a forward downward inclination angle in the forward downward inclination posture and a rear falling of the cutting blade in the rear downward inclination posture. The tilt angle can be changed freely ,
Provided on the other side of the traveling machine body side and the driving part side in a state of being movably linked to the plurality of elongated holes, which are provided on one side of the traveling machine body side and the driving part side, and having a different length. The cutting height adjusting mechanism is configured with the connecting member .

(作用)
本発明の第1特徴によると、原動部及び刈刃を一体で左右軸心周りに姿勢変更して前下がり傾斜姿勢での刈刃の前下がり傾斜角度を変更すると、刈刃の前側の高さが変更され、前方から導入されてきた草を刈り取る刈刃の前側の高さが変更される。この場合、刈刃が前下がり傾斜姿勢でも、草を刈り取るのは刈刃の前側であるので、前方から導入された草を支障なく刈り取ることができる。また、前下がり傾斜姿勢では、刈刃の後側が上方に離れているため、刈刃の下側を通過する草が刈刃を回転させる抵抗になり難くなって、刈刃の駆動による原動部の負荷を小さくすることができる。
(Function)
According to the first feature of the present invention, when the driving part and the cutting blade are integrally changed around the left and right axial centers to change the front lowering inclination angle of the cutting blade in the front lowering inclination position, the height of the front side of the cutting blade is obtained. Is changed, and the height of the front side of the cutting blade that cuts grass introduced from the front is changed. In this case, even if the cutting blade is tilted forward, the grass is cut on the front side of the cutting blade, so that the grass introduced from the front can be cut without trouble. Also, in the forward-downward tilt posture, the rear side of the cutting blade is separated upward, so that the grass passing under the cutting blade is unlikely to become a resistance to rotate the cutting blade, and the driving unit driven by the cutting blade The load can be reduced.

これにより、原動部及び刈刃を一体で左右軸心周りに姿勢変更することで、刈刃による草の刈高さを変更調節でき、例えば刈刃を上下にスライド移動させる機構等が不要になる。また、例えば刈刃のみを左右軸心周りに姿勢変更するように構成すると、刈刃と原動部との接続構造が複雑になるおそれがあるが、原動部及び刈刃を一体で左右軸心周りに姿勢変更することで、刈刃と原動部との接続構造が複雑になることを防止できる。その結果、草の刈高さを変更調節する機構を簡素化することができ、草の刈高さを変更調節する機構の部品点数を削減できる。   As a result, by changing the posture of the driving unit and the cutting blade integrally around the left and right axial centers, the cutting height of the grass by the cutting blade can be changed and adjusted, for example, a mechanism for sliding the cutting blade up and down becomes unnecessary. . For example, if the posture of only the cutting blade is changed around the left and right axis, the connection structure between the cutting blade and the driving part may be complicated, but the driving part and the cutting blade are integrated around the left and right axis. By changing the posture to the above, it is possible to prevent the connection structure between the cutting blade and the driving portion from becoming complicated. As a result, the mechanism for changing and adjusting the grass cutting height can be simplified, and the number of parts of the mechanism for changing and adjusting the grass cutting height can be reduced.

(発明の効果)
本発明の第1特徴によると、歩行型草刈機の軽量化及び低コスト化を実現でき、例えば歩行型草刈機による草刈作業や歩行型草刈機の運搬作業の作業性を向上できる。
(Effect of the invention)
According to the first feature of the present invention, it is possible to reduce the weight and cost of the walking mower, and to improve the workability of the mowing work by the walking mower and the transportation work of the walking mower, for example.

〔歩行型草刈機の全体構成〕
図1〜図6に基づいて、歩行型草刈機の全体構成について説明する。図1及び図2は、歩行型草刈機の全体左側面図及び全体平面図をそれぞれ示し、図3〜図5は、走行機体1の縦断左側面図、横断平面図及び縦断背面図をそれぞれ示す。図6は、前輪5及び後輪6の支持構造を説明する縦断背面図を示す。
[Walking mower overall configuration]
Based on FIGS. 1-6, the whole structure of a walk-type mower is demonstrated. 1 and 2 show an overall left side view and an overall plan view of the walking mower, respectively, and FIGS. 3 to 5 show a longitudinal left side view, a transverse plan view, and a longitudinal rear view of the traveling machine body 1, respectively. . FIG. 6 is a longitudinal rear view for explaining the support structure of the front wheel 5 and the rear wheel 6.

図1及び図2に示すように、走行機体1に装備された機体フレーム2に前部車軸3及び後部車軸4が枢支されており、この前部車軸3及び後部車軸4の左右両端部のそれぞれに板金製の前輪5,5及び後輪6,6が固定されている。機体フレーム2の上部に伝動ケース7が左右向きの軸心P1周りに揺動自在に支持されており、この伝動ケース7の上部に、燃料タンク8aが一体的に構成されたエンジン8が連動連結されて、原動部Eが構成されている。エンジン8には、リコイル式のスタータ8bが装備されており、このスタータ8bによりエンジン8を駆動できるように構成されている。   As shown in FIGS. 1 and 2, a front axle 3 and a rear axle 4 are pivotally supported on a body frame 2 mounted on the traveling body 1, and left and right end portions of the front axle 3 and the rear axle 4 are supported. The front wheels 5, 5 and the rear wheels 6, 6 made of sheet metal are fixed to each. A transmission case 7 is supported on the upper part of the machine body frame 2 so as to be swingable around a left and right axis P1, and an engine 8 integrally formed with a fuel tank 8a is interlocked and connected to the upper part of the transmission case 7. Thus, the driving part E is configured. The engine 8 is equipped with a recoil type starter 8b, and the engine 8 can be driven by the starter 8b.

走行機体1の右側部にはチェーン伝動機構9が配設されており、エンジン8からの動力が伝動ケース7内の伝達経路を介してチェーン伝動機構9に伝達されて前部車軸3及び後部車軸4が回転し、左右の前輪5及び後輪6が回転するように構成されている。伝動ケース7の下部には刈刃10が装着されており、エンジン8からの動力が伝動ケース7内の伝達経路を介して刈刃10に伝達されて刈刃10が回転し、草を刈り取ることができるように構成されている。   A chain transmission mechanism 9 is disposed on the right side of the traveling machine body 1, and the power from the engine 8 is transmitted to the chain transmission mechanism 9 via a transmission path in the transmission case 7 so that the front axle 3 and the rear axle are transmitted. 4 rotates, and the left and right front wheels 5 and rear wheels 6 rotate. A cutting blade 10 is attached to the lower part of the transmission case 7, and the power from the engine 8 is transmitted to the cutting blade 10 via a transmission path in the transmission case 7, so that the cutting blade 10 rotates and cuts grass. It is configured to be able to.

図4及び図5に示すように、機体フレーム2の上部には、平面視でU字状のフレーム18が固定されており、このフレーム18の機体フレーム2から左方側に延出された端部に、支軸19が上下向きの軸心周りに回動自在に支持されている。支軸19の上端部には、横向きの軸心周りでブラケット20が回動自在に支持されており、このブラケット20にパイプ状の操縦ハンドル21が固定されている。   As shown in FIGS. 4 and 5, a U-shaped frame 18 is fixed to the upper part of the body frame 2 in a plan view, and an end of the frame 18 extending leftward from the body frame 2. The support shaft 19 is supported by the portion so as to be rotatable around a vertical axis. A bracket 20 is supported on the upper end portion of the support shaft 19 so as to be rotatable around a lateral axis, and a pipe-like steering handle 21 is fixed to the bracket 20.

図1及び図2に示すように、操縦ハンドル21は、上下向きの軸心周りに揺動変位可能で、かつ、フレーム18との間に備えた第1ロック機構22の作用で、予め設定した上下向きの軸心周りの複数の揺動位置に選択的に固定保持できるように構成されており、横向きの軸心周りに揺動変位可能で、かつ、フレーム18との間に備えた第2ロック機構23の作用で、予め設定した横向きの軸心周りの複数の揺動位置に選択的に固定保持できるように構成されている。   As shown in FIG. 1 and FIG. 2, the steering handle 21 is swingable about the vertical axis and is set in advance by the action of the first lock mechanism 22 provided between the steering handle 21 and the frame 18. It is configured so that it can be selectively fixed and held at a plurality of swing positions around the vertical axis, and is swingable about the horizontal axis, and is provided between the frame 18 and a second frame. By the action of the lock mechanism 23, the lock mechanism 23 can be selectively fixed and held at a plurality of swing positions around a preset lateral axis.

操縦ハンドル21の延出端部には、握り部21aが装備されており、この握り部21aに、ロック状態にバネ付勢された第1ロック機構22のロック解除操作を可能にする第1解除レバー24、及びロック状態にバネ付勢された第2ロック機構23のロック解除操作を可能にする第2解除レバー25が取り付けられて、第1及び第2ロック機構22,23とそれぞれ連係されている。   The extending end of the steering handle 21 is equipped with a grip 21a. The first release that enables the grip 21a to be unlocked by the first lock mechanism 22 that is spring-biased in a locked state. The lever 24 and the second release lever 25 that enables the unlocking operation of the second lock mechanism 23 spring-biased in the locked state are attached, and are linked to the first and second lock mechanisms 22 and 23, respectively. Yes.

操縦ハンドル21の延出端部には、主クラッチレバー21bが横向きの軸心周りで上下に揺動操作可能に装備されており、後述する主クラッチ63と連係されて、刈刃10の回転の停止、及び走行機体1の停止ができるように構成されている。   A main clutch lever 21b is mounted on the extending end of the steering handle 21 so as to be swingable up and down around a lateral axis, and is linked to a main clutch 63, which will be described later, to rotate the cutting blade 10. It is comprised so that a stop and the traveling body 1 can be stopped.

操縦ハンドル21の後端部には、前進位置、中立位置及び後進位置に切換可能な前後進切換レバー26が上下向きの軸心周りに左右に揺動可能に支持されており、この前後進切換レバー26に後述する操作アーム85が連係されて、前後進切換レバー26の操作により歩行型草刈機の前進、停止(中立)、後進の切換ができるように構成されている。   A forward / reverse switching lever 26 that can be switched to a forward position, a neutral position, and a backward position is supported at the rear end of the steering handle 21 so as to be swingable to the left and right around a vertical axis. An operation arm 85, which will be described later, is linked to the lever 26 so that the walking type mower can be switched forward, stop (neutral), and reverse by operating the forward / reverse switching lever 26.

図3,図4,図6に示すように、機体フレーム2は、前後に長い右及び左のメインフレーム31,32と、右及び左のメインフレーム31,32の前端部に亘って設けられた前部フレーム33と、右及び左のメインフレーム31,32の後端部に亘って設けられた後部フレーム34とを備えて構成されている。   As shown in FIGS. 3, 4, and 6, the fuselage frame 2 is provided across right and left main frames 31, 32 that are long in the front-rear direction and front ends of the right and left main frames 31, 32. A front frame 33 and a rear frame 34 provided over rear ends of the right and left main frames 31 and 32 are provided.

前部及び後部フレーム33,34は、円筒状の部材により構成されており、前部フレーム33に、左右の軸受部材37を介して左右向きの前部車軸3が回動自在に内嵌され、後部フレーム34に、左右の軸受部材38を介して左右向きの後部車軸4が回動自在に内嵌されている。   The front and rear frames 33 and 34 are constituted by cylindrical members, and the front axle 3 facing left and right is rotatably fitted to the front frame 33 via left and right bearing members 37. A left and right rear axle 4 is rotatably fitted in the rear frame 34 via left and right bearing members 38.

右及び左のメインフレーム31,32の前端部に亘って走行機体1の前部を保護する前部ロッド35が装着され、右及び左のメインフレーム31,32後端部に亘って走行機体1の後部を保護する後部ロッド36が装着されている。   A front rod 35 that protects the front part of the traveling machine body 1 is mounted over the front ends of the right and left main frames 31 and 32, and the traveling machine body 1 is installed over the rear ends of the right and left main frames 31 and 32. A rear rod 36 for protecting the rear portion is mounted.

図3〜図5に示すように、伝動ケース7から右方に駆動軸7aが延出されており、この駆動軸7aが右のメインフレーム31に軸受部材39を介して回動自在に支持されている。伝動ケース7から左方に駆動軸7aと同心状の揺動支軸7bが延出されており、この揺動支軸7bが左のメインフレーム32に軸受部材40を介して左右向きの軸心P1周りに回動自在に支持されている。これにより、伝動ケース7、伝動ケース7に装着されたエンジン8、及び刈刃10等を左右向きの軸心P1周りで機体フレーム2に一体で前後揺動可能に支持することができる。   As shown in FIGS. 3 to 5, a drive shaft 7 a extends rightward from the transmission case 7, and this drive shaft 7 a is rotatably supported by a right main frame 31 via a bearing member 39. ing. A swing support shaft 7b concentric with the drive shaft 7a extends from the transmission case 7 to the left. The swing support shaft 7b extends to the left main frame 32 via a bearing member 40 and has a left-right axis. It is rotatably supported around P1. As a result, the transmission case 7, the engine 8 attached to the transmission case 7, the cutting blade 10 and the like can be supported integrally with the body frame 2 so as to be able to swing back and forth around the axis P1 in the left-right direction.

駆動軸7a及び揺動支軸7bの左右向きの軸心P1の側面視での前後方向の位置は、駆動軸7a及び揺動支軸7bによって支持される伝動ケース7、エンジン8及び刈刃10等の前後方向での重心位置の近傍に位置するように配設されており、駆動軸7aを停止させて伝動ケース7等に慣性力が働いていない状態では、刈刃10が地面と略水平な状態に維持され、駆動軸7aを回転させて伝動ケース7等に慣性力が作用する状態では、伝動ケース7等の自重による軸心P1周りの力より駆動軸7aを回転させることによる慣性力の方が大きくなって、刈刃10が前下がり傾斜姿勢及び後下がり傾斜姿勢に姿勢変更されるように構成されている(図13及び図14参照)。   The positions of the driving shaft 7a and the swinging support shaft 7b in the front-rear direction in the lateral direction of the axial center P1 are the transmission case 7, the engine 8 and the cutting blade 10 supported by the drive shaft 7a and the swinging support shaft 7b. When the driving shaft 7a is stopped and no inertial force is applied to the transmission case 7 or the like, the cutting blade 10 is substantially horizontal with the ground. In a state where the drive shaft 7a is rotated and the inertial force acts on the transmission case 7 and the like, the inertial force generated by rotating the drive shaft 7a by the force around the axis P1 due to the weight of the transmission case 7 and the like is maintained. This is configured so that the cutting blade 10 is changed in posture to a front-falling inclination posture and a rear-falling inclination posture (see FIGS. 13 and 14).

図3〜図6に示すように、右のメインフレーム31の右外側には、チェーン伝動機構9が装備されている。チェーン伝動機構9は、駆動軸7aの右外端部に連動連結された駆動スプロケット41と、前部車軸3の右外端部に連動連結された前部スプロケット42と、後部車軸4の右外端部に連動連結された後部スプロケット43と、駆動スプロケット41の上部に配設されたテンションスプロケット44と、駆動スプロケット41、前部及び後部スプロケット42,43、及びテンションスプロケット44に亘って巻回張設された伝動チェーン45とを備えて構成されている。   As shown in FIGS. 3 to 6, a chain transmission mechanism 9 is provided on the right outer side of the right main frame 31. The chain transmission mechanism 9 includes a drive sprocket 41 linked to the right outer end of the drive shaft 7a, a front sprocket 42 linked to the right outer end of the front axle 3, and a right outer portion of the rear axle 4. The rear sprocket 43 linked to the end, the tension sprocket 44 disposed on the top of the drive sprocket 41, the drive sprocket 41, the front and rear sprockets 42 and 43, and the tension sprocket 44 And a transmission chain 45 provided.

右のメインフレーム31の右側面には、左右に2分割されたチェーンカバー46が装備されており、左のチェーンカバー46aを右のメインフレーム31に固定し、この左のチェーンカバー46aに右外方側から右のチェーンカバー46bを締め付け固定することで、チェーン伝動機構9をチェーンカバー46によって覆うことができるように構成されている。   A right side surface of the right main frame 31 is provided with a chain cover 46 that is divided into left and right parts. The left chain cover 46a is fixed to the right main frame 31, and the left chain cover 46a is attached to the right outer side. The chain transmission mechanism 9 can be covered with the chain cover 46 by tightening and fixing the right chain cover 46b from the side.

左のチェーンカバー46aの前後中央部の上部には、テンションスプロケット44が左右向きの軸心周りで回動自在に支持されている。テンションスプロケット44は、左のチェーンカバー46aに上下方向に位置変更可能に取り付けられており、テンションスプロケット44を上下に位置調節することで、伝動チェーン45の張り具合を調節できるように構成されている。   A tension sprocket 44 is supported at the upper part of the front and rear central part of the left chain cover 46a so as to be rotatable about a left and right axis. The tension sprocket 44 is attached to the left chain cover 46a so that its position can be changed in the vertical direction. The tension sprocket 44 is configured so that the tension of the transmission chain 45 can be adjusted by adjusting the position of the tension sprocket 44 in the vertical direction. .

右のチェーンカバー46bの前後中央部には、右外方からカバー50が着脱可能に取り付けられており、このカバー50を取り外すことで、チェーンカバー46内の点検ができるように構成されている。   A cover 50 is detachably attached to the front and rear center portion of the right chain cover 46b from the right outer side, and the inside of the chain cover 46 can be inspected by removing the cover 50.

前部車軸3及び後部車軸4の左右両端部には、横外方側から左右の前輪5,5及び後輪6,6が外嵌挿入されて、前部車軸3及び後部車軸4と一体回動可能に固定されている。エンジン8からの動力が伝動ケース7を介して駆動軸7aに伝達されてチェーン伝動機構9を介して前部車軸3及び後部車軸4が回転すると、前輪5及び後輪6が回転し歩行型草刈機が前進又は後進するように構成されている。   Left and right front wheels 5 and 5 and rear wheels 6 and 6 are externally fitted and inserted into the left and right ends of the front axle 3 and the rear axle 4 from the laterally outer side, so that the front axle 3 and the rear axle 4 rotate together. It is fixed so that it can move. When the power from the engine 8 is transmitted to the drive shaft 7a through the transmission case 7 and the front axle 3 and the rear axle 4 rotate through the chain transmission mechanism 9, the front wheels 5 and the rear wheels 6 rotate, and walking type mowing. The machine is configured to move forward or backward.

〔カバーの詳細構造〕
図4〜図7に基づいて、走行機体1に装着されているカバーの詳細構造について説明する。図7は、可動飛散防止カバー54の構造を説明する機体内側から見た縦断側面図を示す。
[Detailed structure of the cover]
Based on FIGS. 4-7, the detailed structure of the cover with which the traveling body 1 is mounted | worn is demonstrated. FIG. 7 shows a longitudinal side view of the structure of the movable scattering prevention cover 54 as viewed from the inside of the machine body.

図4及び図5に示すように、右及び左のメインフレーム31,32の前後中央部下面側に、左右の上側カバー51が固定されており、この左右の上側カバー51に左右の固定飛散防止カバー52が固定されている。左の固定飛散防止カバー52の下端と地面との間の隙間は、右の飛散防止カバー52の下端と地面との間の隙間より広く設定されており、左の飛散防止カバー52は、後述する可動飛散防止カバー54との協働で、刈草の左側への飛散を防止できるように構成されている。   As shown in FIGS. 4 and 5, left and right upper covers 51 are fixed to the lower surfaces of the front and rear central portions of the right and left main frames 31, 32, and left and right upper covers 51 are prevented from fixing left and right fixed scattering. The cover 52 is fixed. The gap between the lower end of the left fixed anti-scatter cover 52 and the ground is set wider than the gap between the lower end of the right anti-scatter cover 52 and the ground, and the left anti-scatter cover 52 will be described later. In cooperation with the movable scattering prevention cover 54, it is configured to prevent scattering of the cut grass to the left side.

図5及び図7に示すように、フレーム18から下方に、前後のブラケット53が延出されており、この前後のブラケット53に可動飛散防止カバー54が装着されている。可動飛散防止カバー54には、上下に長い前後の長穴54Aが形成されており、この前後の長穴54Aに前後のブラケット53から左側方に延出された前後のピン53Aが連通されている。可動飛散防止カバー54の上部には、内方側に突出したバネ取付部54aが設けられており、このバネ取付部54aと前後のブラケット53とに亘って弾性バネ55が装着されている。   As shown in FIGS. 5 and 7, front and rear brackets 53 extend downward from the frame 18, and a movable scattering prevention cover 54 is attached to the front and rear brackets 53. The movable scattering prevention cover 54 has long front and rear long holes 54A formed in the vertical direction, and front and rear pins 53A extending leftward from the front and rear brackets 53 are communicated with the front and rear long holes 54A. . A spring mounting portion 54 a that protrudes inward is provided on the upper part of the movable scattering prevention cover 54, and an elastic spring 55 is mounted across the spring mounting portion 54 a and the front and rear brackets 53.

可動飛散防止カバー54の前端部下部には、側面視で前方上方に切り欠かれた前部傾斜部54bが形成されており、可動飛散防止カバー54の後端部下部には、側面視で後方上方に切り欠かれた後部傾斜部54cが形成されている。これにより、例えば歩行型草刈機を前進させて左側前方からの石等の障害物が可動飛散防止カバー54に接当すると、可動飛散防止カバー54に形成した長穴54Aにより弾性バネ55の付勢力に抗して可動飛散防止カバー54が上方へ移動する。逆に、歩行型草刈機を後進させて左側後方から石等の障害物が可動飛散防止カバー54に接当すると、可動飛散防止カバー54に形成した長穴54Aにより弾性バネ55の付勢力に抗して可動飛散防止カバー54が上方に移動する。   The lower part of the front end portion of the movable scattering prevention cover 54 is formed with a front inclined portion 54b that is notched upward in the side view, and the rear lower portion of the movable scattering prevention cover 54 is rearward in the side view. A rear inclined portion 54c cut out upward is formed. As a result, for example, when an ambulatory mower is moved forward and an obstacle such as a stone from the front left side comes into contact with the movable scattering prevention cover 54, the biasing force of the elastic spring 55 is caused by the elongated hole 54A formed in the movable scattering prevention cover 54. The movable scattering prevention cover 54 moves upward against this. On the contrary, when the walking type mower is moved backward and an obstacle such as a stone comes into contact with the movable scattering prevention cover 54 from the left rear side, the urging force of the elastic spring 55 is resisted by the elongated hole 54A formed in the movable scattering prevention cover 54. Then, the movable scattering prevention cover 54 moves upward.

図4及び図5に示すように、可動飛散防止カバー54の前部及び後部は、左の前輪5及び後輪6の外面に沿うように配設され、前端部及び後端部がそれぞれ内方側に折り曲げられた形状に成形されて、この内方側に折り曲げられた前端部及び後端部が平面視で前輪5及び後輪6と重なるように配設されている。また、可動飛散防止カバー54の下端と地面との間の隙間は、右の固定飛散防止カバー52の下端と地面との間の隙間と略同じに設定されている。これにより、可動飛散防止カバー54の下端と地面との間の隙間、及び可動飛散防止カバー54と前輪5及び後輪6との隙間を小さく設定でき、刈草の左側方への飛散を効果的に防止できる。   As shown in FIGS. 4 and 5, the front part and the rear part of the movable scattering prevention cover 54 are arranged along the outer surfaces of the left front wheel 5 and the rear wheel 6, and the front end part and the rear end part are inward, respectively. The front end portion and the rear end portion bent inward are formed so as to overlap the front wheel 5 and the rear wheel 6 in plan view. Further, the gap between the lower end of the movable scattering prevention cover 54 and the ground is set to be substantially the same as the gap between the lower end of the right fixed scattering prevention cover 52 and the ground. Thereby, the clearance between the lower end of the movable scattering prevention cover 54 and the ground, and the clearance between the movable scattering prevention cover 54 and the front wheel 5 and the rear wheel 6 can be set small, and scattering of the cut grass to the left side can be effectively performed. Can be prevented.

上記のように可動飛散防止カバー54を構成することにより、通常時には、弾性バネ55の付勢力により可動飛散防止カバー54を下方側に付勢して前輪5と後輪6との間を広く可動飛散防止カバー54によって側方から覆うことができ、障害物に接当した時には、弾性バネ55の付勢力に抗して可動飛散防止カバー54が上方へ移動して可動飛散防止カバー54の破損を防止できる。なお、走行機体1の右側に可動飛散防止カバー54を設けてもよく、走行機体1の左右両側に可動飛散防止カバー54を設けてもよい。   By configuring the movable scattering prevention cover 54 as described above, normally, the movable scattering prevention cover 54 is urged downward by the urging force of the elastic spring 55 to widely move between the front wheel 5 and the rear wheel 6. The anti-scattering cover 54 can be covered from the side, and when it comes into contact with an obstacle, the movable anti-scattering cover 54 moves upward against the urging force of the elastic spring 55 to damage the movable anti-scattering cover 54. Can be prevented. The movable scattering prevention cover 54 may be provided on the right side of the traveling machine body 1, and the movable scattering prevention cover 54 may be provided on both the left and right sides of the traveling machine body 1.

図3及び図6に示すように、右及び左のメインフレーム31,32に亘って設けられた前部フレーム33には、左右の前輪5の間を覆うゴム製の前部飛散防止部材56が左右方向の軸心周りで前後に揺動可能に装着されており、右及び左のメインフレーム31,32に亘って設けられた後部フレーム34には、左右の後輪6の間を覆うゴム製の後部飛散防止部材57が左右方向の軸心周りで前後に揺動可能に装着されている。前部及び後部飛散防止カバー56,57の左右両端部は、それぞれ前輪5及び後輪6の内側に入り込むような形状に成形されており、これにより、刈草の前方及び後方への飛散を効果的に防止できる。   As shown in FIGS. 3 and 6, the front frame 33 provided across the right and left main frames 31, 32 has a rubber front scattering prevention member 56 that covers the space between the left and right front wheels 5. A rear frame 34 that is swingably mounted back and forth around the axis in the left-right direction and that is provided over the right and left main frames 31, 32 is made of rubber that covers the space between the left and right rear wheels 6. The rear scattering prevention member 57 is mounted so as to be swingable back and forth around the axis in the left-right direction. The left and right end portions of the front and rear scattering prevention covers 56 and 57 are shaped so as to enter the inside of the front wheel 5 and the rear wheel 6, respectively, thereby effectively scattering the cutting grass forward and backward. Can be prevented.

図4及び図6に示すように、機体フレーム2は、前後に2分割された前後の上部カバー58によって上方から覆われている。前後の上部カバー58の中央部は上方へ膨出した形状に成形され、外周部が水平な形状に成形されており、前後の上部カバー58の水平な形状に成形された左右両側部が右及び左のメインフレーム31,32の上面側の複数箇所に締め付け固定されている。   As shown in FIGS. 4 and 6, the body frame 2 is covered from above by front and rear upper covers 58 that are divided into front and rear parts. The center part of the front and rear upper covers 58 is formed in a shape bulging upward, the outer peripheral part is formed in a horizontal shape, and the left and right side parts formed in the horizontal shape of the front and rear upper cover 58 are right and right. It is fastened and fixed at a plurality of locations on the upper surface side of the left main frames 31 and 32.

〔刈刃の詳細構造〕
図5及び図8に基づいて、刈刃10の詳細構造について説明する。図8は、刈刃10の構造を説明する横断平面図を示す。
[Detailed structure of the cutting blade]
Based on FIG.5 and FIG.8, the detailed structure of the cutting blade 10 is demonstrated. FIG. 8 is a cross-sectional plan view illustrating the structure of the cutting blade 10.

図5及び図8に示すように、刈刃10は、伝動ケース7の下部に刈刃10を装着するボス部材11と、このボス部材11に固着された回転円板12と、回転円板12に外周部に回動自在に支持された複数の刈刃体13と、回転円板12の上面側に固定された複数の拡散羽根14とを備えて構成されている。   As shown in FIGS. 5 and 8, the cutting blade 10 includes a boss member 11 that attaches the cutting blade 10 to the lower portion of the transmission case 7, a rotating disk 12 fixed to the boss member 11, and a rotating disk 12. And a plurality of cutting blade bodies 13 rotatably supported on the outer peripheral portion, and a plurality of diffusion blades 14 fixed to the upper surface side of the rotating disk 12.

回転円板12は、ボス部材11との固定部から外方側に徐々に地面との間の距離が狭くなるように外方下方へ傾斜した下向きの皿状に成形され、外周部に地面と略水平な水平部12aが形成されている。刈刃体13は、斜め外方側上方に傾斜する形状に成形された上側刈刃体13aと、斜め外方側下方に傾斜する形状に成形された下側刈刃体13bとによって構成されており、回転円板12の外周部の水平部12aの複数箇所に、上側刈刃体13aと下側刈刃体13bとが交互に、約90度の等ピッチでピン15により回動自在に支持されている。   The rotating disk 12 is formed in a downward dish shape that is inclined outward and downward so that the distance from the ground gradually decreases outward from the fixing portion with the boss member 11, and the ground and A substantially horizontal horizontal portion 12a is formed. The cutting blade body 13 is composed of an upper cutting blade body 13a formed into a shape inclined obliquely outward and upward, and a lower cutting blade body 13b formed into a shape inclined obliquely outward and downward. The upper cutting blade body 13a and the lower cutting blade body 13b are alternately supported by the pins 15 at an equal pitch of about 90 degrees at a plurality of positions on the horizontal portion 12a on the outer peripheral portion of the rotating disk 12. Has been.

拡散羽根14は、外方側に向かうに従って徐々に羽根の面積が広くなるように、その上端部が斜め外方上方に傾斜する形状に成形されており、軸心P2から互いに隣接する刈刃体13の中間位置を、放射状に約90度の等ピッチで配設されている。   The diffusion blades 14 are shaped so that the upper end portion thereof is inclined obliquely upward and upward so that the area of the blades gradually increases toward the outer side, and the cutting blade bodies adjacent to each other from the axis P2 Thirteen intermediate positions are arranged radially at an equal pitch of about 90 degrees.

伝動ケース7の下部には、刈刃カバー16が装着されており、この刈刃カバー16により、刈草の回転中心側への入り込みが阻止されて、回転中心での刈草の巻き付きを防止できるように構成されている。   A cutting blade cover 16 is attached to the lower part of the transmission case 7, and the cutting blade cover 16 prevents the cutting grass from entering the rotation center side so that the cutting grass can be prevented from being wound around the rotation center. It is configured.

〔歩行型草刈機の伝動構造〕
図9〜図12に基づいて、歩行型草刈機の伝動構造について説明する。図9は、歩行型草刈機の伝動系統図を示し、図10及び図11は、歩行型草刈機の伝動構造の縦断背面図及び横断平面図をそれぞれ示す。また、図12は、刈刃クラッチ68の斜視図を示す。
[Transmission structure of walking type mower]
Based on FIGS. 9-12, the transmission structure of a walk-type mower is demonstrated. FIG. 9 shows a transmission system diagram of the walking mower, and FIGS. 10 and 11 show a longitudinal rear view and a transverse plan view of the transmission structure of the walking mower, respectively. FIG. 12 is a perspective view of the cutting blade clutch 68.

図9〜図11に示すように、伝動ケース7の上部に一対のベアリング61を介して上下向き入力軸62が回動自在に支持されており、この入力軸62の上端部が伝動ケース7の上部に固定されたエンジン8の出力軸8cに主クラッチ63を介して連結されている。入力軸62の下部に、伝動ギア64が一体回動可能に連結されており、この伝動ギア64が後述する上部伝動軸65に連動連結された伝動ギア72に咬合されている。   As shown in FIGS. 9 to 11, a vertical input shaft 62 is rotatably supported on the upper portion of the transmission case 7 via a pair of bearings 61, and the upper end portion of the input shaft 62 is connected to the transmission case 7. The main shaft 63 is connected to an output shaft 8c of the engine 8 fixed to the upper portion. A transmission gear 64 is connected to a lower portion of the input shaft 62 so as to be integrally rotatable. The transmission gear 64 is engaged with a transmission gear 72 that is interlocked and connected to an upper transmission shaft 65 described later.

伝動ケース7の上下向きの軸心P2周りに同心状に配設された上部伝動軸65及び下部伝動軸66が複数のベアリング67を介して回動自在に支持されており、上部伝動軸65と下部伝動軸66とに亘って刈刃クラッチ68が装着されている。下部伝動軸66の下端部には、刈刃10のボス部材11が下方側から締め付け固定されており、刈刃クラッチ68を入り側に操作すると、エンジン8からの動力が入力軸62、上部伝動軸65、及び刈刃クラッチ68を介して下部伝動軸66に伝達されて刈刃10が回転するように構成されている。   An upper transmission shaft 65 and a lower transmission shaft 66 that are concentrically disposed around a vertical axis P2 of the transmission case 7 are rotatably supported via a plurality of bearings 67. A cutting blade clutch 68 is mounted across the lower transmission shaft 66. The boss member 11 of the cutting blade 10 is fastened and fixed to the lower end portion of the lower transmission shaft 66 from below, and when the cutting blade clutch 68 is operated to the ingress side, the power from the engine 8 is input to the input shaft 62 and the upper transmission. The cutting blade 10 is configured to rotate by being transmitted to the lower transmission shaft 66 via the shaft 65 and the cutting blade clutch 68.

図10及び図12に示すように、刈刃クラッチ68は、上部伝動軸65に連動連結された上部クラッチ69と、下部伝動軸66に一体回動可能でかつスプライン構造により上下にスライド移動可能に外嵌された下部クラッチ70とを備えて構成されており、上部クラッチ69及び下部クラッチ70には、互いに係合する係合片69a,70aがそれぞれ形
成されている。
As shown in FIGS. 10 and 12, the cutting blade clutch 68 can rotate integrally with the upper clutch 69 linked to the upper transmission shaft 65 and the lower transmission shaft 66 and can slide up and down by a spline structure. The upper clutch 69 and the lower clutch 70 are formed with engaging pieces 69a and 70a that are engaged with each other.

下部クラッチ70の下面側とベアリング67の上面側とに亘って下部クラッチ70を上方に付勢する弾性バネ68aが装着されており、この弾性バネ68aにより刈刃クラッチ68が入り側に付勢されるように構成されている。   An elastic spring 68a that urges the lower clutch 70 upward is mounted across the lower surface side of the lower clutch 70 and the upper surface side of the bearing 67, and the cutting blade clutch 68 is urged toward the entry side by the elastic spring 68a. It is comprised so that.

係合片69a,70aには、斜めに傾斜した傾斜部69b,70bが形成されており、エンジン8からの動力が上部伝動軸65を介して下部伝動軸66に伝達される状態では、上部クラッチ69の係合片69aと下部クラッチ70の係合片70aとが噛み合ってエンジン8からの動力が下部伝動軸66に伝達される。   The engaging pieces 69a and 70a are formed with inclined portions 69b and 70b that are inclined obliquely. When power from the engine 8 is transmitted to the lower transmission shaft 66 via the upper transmission shaft 65, the upper clutch The engagement piece 69 a of 69 and the engagement piece 70 a of the lower clutch 70 mesh with each other, and the power from the engine 8 is transmitted to the lower transmission shaft 66.

例えば、エンジン8を停止させて上部伝動軸65の回転が停止した状態で、刈刃10が慣性力により回転して、刈刃10からの慣性力が下部伝動軸66から上部伝動軸65に伝達されようとすると、係合片69a,70aの傾斜部69b,70bにより上部クラッチ69に対して下部クラッチ70が相対回転して滑り、下部伝動軸66からの慣性力の上部伝動軸65への伝達が遮断される。刈刃10の慣性力による回転が止まると、弾性バネ68aの付勢力により下部クラッチ70が上方へ操作され、刈刃クラッチ68が入り側に操作される。   For example, when the engine 8 is stopped and the rotation of the upper transmission shaft 65 is stopped, the cutting blade 10 is rotated by the inertial force, and the inertial force from the cutting blade 10 is transmitted from the lower transmission shaft 66 to the upper transmission shaft 65. As a result, the lower clutch 70 is rotated relative to the upper clutch 69 by the inclined portions 69b and 70b of the engagement pieces 69a and 70a, and the inertial force from the lower transmission shaft 66 is transmitted to the upper transmission shaft 65. Is cut off. When the rotation of the cutting blade 10 due to the inertial force stops, the lower clutch 70 is operated upward by the biasing force of the elastic spring 68a, and the cutting blade clutch 68 is operated on the entry side.

これにより、刈刃10の慣性力の伝動上流側(エンジン8側及び駆動軸7b側)への連れ回り(例えば刈刃10の慣性力により前輪5及び後輪6が動くこと等)を防止できると共に、例えば刈刃10の回転を強制的に制動するブレーキ装置等(図示せず)を刈刃10の伝動上流側(例えば上部伝動軸65又は下部伝動軸66等)に装備して、エンジン8を停止させた際の刈刃10の回転による慣性力が伝動上流側に伝達されないように構成する場合に比べ、刈刃10からの慣性力の伝動上流側への伝達を抑制する機構を簡素化することができ、製造コストを削減できる。   As a result, it is possible to prevent the inertial force of the cutting blade 10 from rotating along the transmission upstream side (the engine 8 side and the drive shaft 7b side) (for example, the front wheel 5 and the rear wheel 6 are moved by the inertial force of the cutting blade 10). In addition, for example, a brake device (not shown) that forcibly brakes the rotation of the cutting blade 10 is provided on the transmission upstream side of the cutting blade 10 (for example, the upper transmission shaft 65 or the lower transmission shaft 66), and the engine 8 Compared to a configuration in which the inertial force due to the rotation of the cutting blade 10 when it is stopped is not transmitted to the transmission upstream side, the mechanism for suppressing the transmission of the inertial force from the cutting blade 10 to the transmission upstream side is simplified. Manufacturing costs can be reduced.

下部クラッチ70は、刈刃クラッチ68のシフト部材としても機能するように、下部クラッチ70の下部の外周部にシフト溝70cが形成されており、このシフト溝70cに、前後向きの軸心周りで左右に揺動可能に支持されたシフトレバー71の操作部71aが係合されて、シフトレバー71のレバー本体71bを揺動操作すると下部クラッチ70が上下にスライド移動して刈刃クラッチ68の断接ができるように構成されている。   The lower clutch 70 is formed with a shift groove 70c in the outer periphery of the lower portion of the lower clutch 70 so as to function as a shift member of the cutting blade clutch 68. When the operating portion 71a of the shift lever 71 supported so as to be swingable to the left and right is engaged and the lever main body 71b of the shift lever 71 is operated to swing, the lower clutch 70 slides up and down and the cutting blade clutch 68 is disconnected. It is configured to be able to contact.

図9〜図11に示すように、上部伝動軸65には、伝動ギア72,73が連動連結され
ており、伝動ギア72が入力軸62に固定された伝動ギア64に咬合されている。伝動ケース7に回動自在に支持された前後向きの伝動軸74に伝動ギア75が連動連結されており、この伝動ギア75が上部伝動軸65に連動連結された伝動ギア73に咬合されて、上下向きの上部伝動軸65からの動力が90度角度変更されて前後向きの伝動軸74に伝達されるように構成されている。伝動軸74には、伝動ギア76が連動連結されており、この伝動ギア76が伝動軸74の右下側に配設され伝動軸77に連動連結された伝動ギア78に咬合されている。
As shown in FIGS. 9 to 11, transmission gears 72 and 73 are interlocked to the upper transmission shaft 65, and the transmission gear 72 is engaged with a transmission gear 64 fixed to the input shaft 62. A transmission gear 75 is interlocked and connected to a transmission shaft 74 that is supported by the transmission case 7 in a freely rotating manner, and this transmission gear 75 is engaged with a transmission gear 73 that is interlocked and connected to the upper transmission shaft 65. The power from the upper transmission shaft 65 facing up and down is changed by 90 degrees and transmitted to the transmission shaft 74 facing front and rear. A transmission gear 76 is interlocked and connected to the transmission shaft 74, and this transmission gear 76 is engaged with a transmission gear 78 disposed on the lower right side of the transmission shaft 74 and interlocked and connected to the transmission shaft 77.

伝動軸77には、ベベルギア79が連動連結されており、このベベルギア79が左右向きの駆動軸7aに外嵌された前進用ベベルギア80及び後進用ベベルギア81に咬合されている。駆動軸7aは、伝動ケース7にベアリング83を介して左右向きの軸心P1周りに回動自在に支持されており、この駆動軸7aに、前進用及び後進用ベベルギア80,8
1が回動自在に外嵌され、前進用ベベルギア80と後進用ベベルギア81との間にシフト部材82が左右方向にスライド移動可能でかつ駆動軸7aと一体回動可能に外嵌されている。
A bevel gear 79 is interlocked to the transmission shaft 77, and the bevel gear 79 is engaged with a forward-bevel gear 80 and a backward-bevel gear 81 that are externally fitted to the left-right drive shaft 7a. The drive shaft 7a is supported by the transmission case 7 via a bearing 83 so as to be rotatable about a left-right axis P1, and the forward and reverse bevel gears 80, 8 are supported on the drive shaft 7a.
1 is rotatably fitted, and a shift member 82 is externally fitted between the forward bevel gear 80 and the backward bevel gear 81 so as to be slidable in the left-right direction and to be integrally rotatable with the drive shaft 7a.

伝動ケース7には、操作軸84が上下向きの軸心周りに回動自在に支持されており、この操作軸84の上端部及び下端部に操作アーム85及び上下の操作部材86が連結されている。シフト部材82の外周部には、シフト溝82aが形成されており、このシフト溝82aに操作軸84に連結された操作部材86が係合されている。操作アーム85を前後に揺動操作するとシフト部材82が左右方向にスライド移動して前進用ベベルギア80又は後進用ベベルギア81に噛み合い、走行機体1の前進、停止(中立)及び後進の切換ができるように構成されている。このように、ベベルギア79、前進用ベベルギア80、後進用ベベルギア、シフト部材82等により、前後進クラッチ87が構成されている。   In the transmission case 7, an operation shaft 84 is supported so as to be rotatable around a vertical axis, and an operation arm 85 and upper and lower operation members 86 are connected to an upper end portion and a lower end portion of the operation shaft 84. Yes. A shift groove 82a is formed on the outer periphery of the shift member 82, and an operation member 86 connected to the operation shaft 84 is engaged with the shift groove 82a. When the operation arm 85 is swung back and forth, the shift member 82 slides in the left-right direction and meshes with the forward-bevel gear 80 or the backward-bevel gear 81 so that the traveling machine body 1 can be switched between forward, stop (neutral), and reverse. It is configured. Thus, the forward / reverse clutch 87 is constituted by the bevel gear 79, the forward bevel gear 80, the reverse bevel gear, the shift member 82, and the like.

図1及び図2に示すように、操作アーム85は、操縦ハンドル21に装備された前後進切換レバー26に連係されており、前後進切換レバー26を前進側(左側)に揺動操作すると、操作アーム85が後方に揺動操作されてシフト部材82が前進用ベベルギア80に咬合し前後進クラッチ87が前進側に入り操作され、ベベルギア79からの動力が前進用ベベルギア80及びシフト部材82を介して駆動軸7aに伝達されて、駆動軸7aが正回転駆動する。一方、前後進切換レバー21を後進側(右側)に揺動操作すると、操作アーム85が前方に揺動操作されてシフト部材82が後進用ベベルギア81に咬合し前後進クラッチ87が後進側に入り操作され、ベベルギア79からの動力が後進用ベベルギア81及びシフト部材82を介して駆動軸7aに伝達されて、駆動軸7aが逆回転駆動する。   As shown in FIGS. 1 and 2, the operating arm 85 is linked to the forward / reverse switching lever 26 provided on the steering handle 21, and when the forward / backward switching lever 26 is operated to swing forward (left side), The operating arm 85 is swung backward, the shift member 82 is engaged with the forward bevel gear 80, the forward / reverse clutch 87 is operated to enter the forward side, and the power from the bevel gear 79 is transmitted via the forward bevel gear 80 and the shift member 82. Is transmitted to the drive shaft 7a, and the drive shaft 7a is driven to rotate forward. On the other hand, when the forward / reverse switching lever 21 is swung to the reverse side (right side), the operation arm 85 is swung forward, the shift member 82 is engaged with the reverse bevel gear 81, and the forward / reverse clutch 87 enters the reverse side. By being operated, the power from the bevel gear 79 is transmitted to the drive shaft 7a via the reverse bevel gear 81 and the shift member 82, and the drive shaft 7a is driven to rotate in reverse.

図9〜図11に示すように、駆動軸7aの右端部には、チェーン伝動機構9の駆動スプロケット41が連動連結されており、駆動軸7aからの動力がチェーン伝動機構9を介して前部車軸3及び後部車軸4に伝達されて、前輪5及び後輪6が正逆転し、走行機体1が前進又は後進する。   As shown in FIGS. 9 to 11, the drive sprocket 41 of the chain transmission mechanism 9 is interlocked with the right end portion of the drive shaft 7 a, and the power from the drive shaft 7 a is forwarded via the chain transmission mechanism 9. The transmission is transmitted to the axle 3 and the rear axle 4 so that the front wheels 5 and the rear wheels 6 are rotated forward and backward, and the traveling machine body 1 moves forward or backward.

〔刈高さ調節機構の詳細構造〕
図3及び図4に基づいて、刈高さ調節機構90(傾斜角度調節機構)の詳細構造について説明する。図3及び図4に示すように、左のメインフレーム32の後部上面側に締め付け固定されたブラケット91と、伝動ケース7の左側部に締め付け固定された板状のブラケット92とに亘って連係部材としての連係ロッド93を連係することで、刈高さの下限範囲を規制する刈高さ調節機構90が構成されている。
[Detailed structure of cutting height adjustment mechanism]
Based on FIG.3 and FIG.4, the detailed structure of the cutting height adjustment mechanism 90 (tilt angle adjustment mechanism) is demonstrated. As shown in FIGS. 3 and 4, the linkage member spans a bracket 91 fastened and fixed to the upper surface of the rear portion of the left main frame 32 and a plate-like bracket 92 fastened and fixed to the left side of the transmission case 7. As a result, the cutting height adjusting mechanism 90 that restricts the lower limit range of cutting height is configured.

ブラケット91は、板材をL字状に折り曲げ成形して構成されており、左のメインフレーム32との固定部分から上方に延出された部分に3つの調節穴91A,91B,91Cが加工されている。上側の調節穴91Aは、丸穴に成形されており、中央の調節穴91B及び下側の調節穴91Cは、それぞれ前後に長い長穴に成形されている。後述する刈高さH1,H2,H3が略等しい間隔で高くなるように、調節穴91B,91Cの長穴の長さが徐々に長くなるように設定されている。   The bracket 91 is formed by bending a plate material into an L shape, and three adjustment holes 91A, 91B, 91C are processed in a portion extending upward from a portion fixed to the left main frame 32. Yes. The upper adjustment hole 91A is formed into a round hole, and the center adjustment hole 91B and the lower adjustment hole 91C are each formed into a long long hole in the front and rear direction. The lengths of the elongated holes of the adjustment holes 91B and 91C are set so as to gradually increase so that the cutting heights H1, H2, and H3, which will be described later, increase at substantially equal intervals.

連係ロッド93の前端部及び後端部は、それぞれ内方側及び外方側に折り曲げられた形状に成形されており、連係ロッド93の前端部をブラケット92上部の左右向きの貫通穴に連係し、連係ロッド93の後端部をブラケット91の調節穴91A,91B,91Cのいずれか一つにピン94で連係することで、左右向きの軸心P1周りでの伝動ケース7等の揺動範囲の上限を規制できるように構成されている。   The front end portion and the rear end portion of the linkage rod 93 are formed to be bent inward and outward, respectively, and the front end portion of the linkage rod 93 is linked to the left and right through holes in the upper portion of the bracket 92. By connecting the rear end portion of the linkage rod 93 to any one of the adjustment holes 91A, 91B, 91C of the bracket 91 with the pin 94, the swing range of the transmission case 7 and the like around the left-right axis P1 It is comprised so that the upper limit of can be regulated.

連係ロッド93の後端部を調節穴91Aに連係すると、左右向きの軸心P1周りでの伝動ケース7の揺動が規制されて、エンジン8を駆動して刈刃10を回転させたとしても、刈刃10の下端部の高さはH1のままで変化しない。   Even if the rear end portion of the linkage rod 93 is linked to the adjustment hole 91A, the swinging of the transmission case 7 around the left and right axis P1 is restricted, and the cutting blade 10 is rotated by driving the engine 8. The height of the lower end portion of the cutting blade 10 remains H1 and does not change.

連係ロッド93の後端部を調節穴91Bに連係すると、連係ロッド93の後端部の移動が調節穴91Bの長穴の範囲で許容され、左右向きの軸心P1周りでの伝動ケース7等の前方及び後方への揺動が調節穴91Bの長穴の範囲で許容される。例えばエンジン8を駆動させて前後進切換レバー26を前進側に操作すると、伝動ケース7の下端部に連結された刈刃10が、地面と略水平な高さH1から調節穴91Bで許容された範囲で傾斜する。そして、連係ロッド93の後端部が調節穴91Bの先端に接当して、刈刃10の下端部の高さが自動的に高さH2に変更されて、その高さH2が維持される。   When the rear end portion of the linkage rod 93 is linked to the adjustment hole 91B, the movement of the rear end portion of the linkage rod 93 is allowed in the range of the elongated hole of the adjustment hole 91B, and the transmission case 7 around the axis P1 in the left-right direction. Is allowed in the range of the elongated hole of the adjustment hole 91B. For example, when the engine 8 is driven and the forward / reverse switching lever 26 is operated forward, the cutting blade 10 connected to the lower end of the transmission case 7 is allowed in the adjustment hole 91B from the height H1 substantially horizontal to the ground. Tilt in range. And the rear-end part of the linkage rod 93 contacts the front-end | tip of the adjustment hole 91B, the height of the lower end part of the cutting blade 10 is automatically changed into height H2, and the height H2 is maintained. .

連係ロッド93の後端部を調節穴91Cに連係すると、連係ロッド93の後端部の移動が調節穴91Cの長穴の範囲で許容され、左右向きの軸心P1周りでの伝動ケース7等の前方及び後方への揺動が調節穴91Cの長穴の範囲で許容される。例えばエンジン8を駆動させて前後進切換レバー26を前進側に操作すると、伝動ケース7の下端部に連結された刈刃10が、地面と略水平な高さH1から調節穴91Cで許容された範囲で傾斜する。そして、連係ロッド93の後端部が調節穴91Cの先端に接当して、刈刃10の下端部の高さが自動的に高さH3に変更されて、その高さH3が維持される。   When the rear end portion of the linkage rod 93 is linked to the adjustment hole 91C, the movement of the rear end portion of the linkage rod 93 is allowed in the range of the long hole of the adjustment hole 91C, and the transmission case 7 around the left and right axis P1 is provided. Is allowed in the range of the elongated hole of the adjustment hole 91C. For example, when the engine 8 is driven and the forward / reverse switching lever 26 is operated forward, the cutting blade 10 connected to the lower end of the transmission case 7 is allowed in the adjustment hole 91C from the height H1 substantially horizontal to the ground. Tilt in range. And the rear-end part of the linkage rod 93 contacts the front-end | tip of the adjustment hole 91C, the height of the lower end part of the cutting blade 10 is automatically changed to the height H3, and the height H3 is maintained. .

なお、エンジン8を停止させるか、又は前後進切換レバー26を停止側(中立側)に操作すると、刈刃10の高さが自動的に地面と略水平な高さH1に変更される。   When the engine 8 is stopped or when the forward / reverse switching lever 26 is operated to the stop side (neutral side), the height of the cutting blade 10 is automatically changed to a height H1 substantially horizontal to the ground.

以上のように刈高さ調節機構90を構成することにより、ピン94を脱着して連係ロッド93の後端部の調節穴91A,91B,91Cへの連係位置を変更することで、伝動ケース7の揺動範囲を変更して、刈刃10の下端部の高さをH1,H2,H3の3段階で変更調節することができ、刈刃10による刈高さ(後述する刈刃10の前下がり傾斜角度α(後下がり傾斜角度α))を3段階で変更調節できる。   By configuring the cutting height adjusting mechanism 90 as described above, the transmission case 7 can be changed by changing the linkage position of the rear end portion of the linkage rod 93 to the adjustment holes 91A, 91B, 91C by removing the pin 94. The height of the lower end portion of the cutting blade 10 can be changed and adjusted in three stages H1, H2, and H3, and the cutting height by the cutting blade 10 (before the cutting blade 10 to be described later) can be changed. The downward inclination angle α (rear downward inclination angle α)) can be changed and adjusted in three stages.

〔刈刃の傾斜状況の説明〕
図13及び図14に基づいて,刈刃10の傾斜状況について説明する。図13は、走行機体1を前進させた前下がり傾斜姿勢での刈刃10の傾斜状況を示し、図14は、走行機体1を後進させた後下がり傾斜姿勢での刈刃10の傾斜状況を示す。
[Explanation of the cutting blade inclination]
Based on FIG.13 and FIG.14, the inclination condition of the cutting blade 10 is demonstrated. FIG. 13 shows the state of inclination of the cutting blade 10 in the forwardly lowered inclination posture where the traveling machine body 1 is moved forward, and FIG. 14 shows the state of inclination of the cutting blade 10 in the rearwardly lowered inclination posture where the traveling body 1 is moved backward. Show.

図13に示すように、刈刃10が回転していない地面と略水平になった状態から、エンジン8を駆動させて前後進切換レバー26を前進側に切り換えると、駆動軸7aが左右向きの軸心P1周りに図13の黒矢印で示す時計回りに回転する。駆動軸7aが時計回りに回転すると、力の作用反作用の法則により、図13の黒矢印で示す駆動軸7aが回転する方向とは逆の反時計回りの方向の力が伝動ケース7に作用する。伝動ケース7に反時計回りの力が作用すると、伝動ケース7、伝動ケース7に連結されたエンジン8、及び刈刃10が一体で左右向きの軸心P1周りで前方へ揺動し、刈高さ調節機構90により揺動範囲が規制され(図13では、刈高さをH3に設定した場合)、伝動ケース7、エンジン8及び刈刃10が水平時よりも角度α前下がり傾斜した状態になる。   As shown in FIG. 13, when the cutting blade 10 is substantially level with the non-rotating ground, when the engine 8 is driven and the forward / reverse switching lever 26 is switched to the forward side, the drive shaft 7 a is directed left and right. It rotates clockwise around the axis P1 as indicated by the black arrow in FIG. When the drive shaft 7a rotates clockwise, the force in the counterclockwise direction opposite to the direction of rotation of the drive shaft 7a indicated by the black arrow in FIG. 13 acts on the transmission case 7 according to the law of action and reaction of force. . When a counterclockwise force is applied to the transmission case 7, the transmission case 7, the engine 8 coupled to the transmission case 7, and the cutting blade 10 are integrally swung forward about the left and right axis P1, and the cutting height is increased. The swing range is regulated by the height adjusting mechanism 90 (in FIG. 13, when the cutting height is set to H3), the transmission case 7, the engine 8 and the cutting blade 10 are inclined downward by an angle α from the horizontal level. Become.

一方、図14に示すように、刈刃10が回転していない地面と略水平になった状態から、エンジン8を駆動させて前後進切換レバー26を後進側に切り換えると、駆動軸7aが左右向きの軸心P1周りに図14の黒矢印で示す反時計回りに回転する。駆動軸7aが反時計回りに回転すると、力の作用反作用の法則により、図14の黒矢印で示す駆動軸7aが回転する方向とは逆の時計回りの方向の力が伝動ケース7に作用する。伝動ケース7に時計回りの力が作用すると、伝動ケース7、並びに伝動ケース7に連結されたエンジン8及び刈刃10が一体で左右向きの軸心P1周りで後方へ揺動し、刈高さ調節機構90により揺動範囲が規制されて(図14では、刈高さをH3に設定した場合)、伝動ケース7、エンジン8及び刈刃10が水平時よりも角度α後下がり傾斜した状態になる。   On the other hand, as shown in FIG. 14, when the engine 8 is driven and the forward / reverse switching lever 26 is switched to the reverse side from a state where the cutting blade 10 is substantially horizontal with the non-rotating ground, the drive shaft 7a is moved to the left and right. It rotates counterclockwise as indicated by the black arrow in FIG. When the drive shaft 7a rotates counterclockwise, a force in the clockwise direction opposite to the direction in which the drive shaft 7a rotates indicated by the black arrow in FIG. . When a clockwise force is applied to the transmission case 7, the transmission case 7, and the engine 8 and the cutting blade 10 connected to the transmission case 7 are integrally swung backward about the left and right axis P1, and the cutting height is increased. The swinging range is regulated by the adjusting mechanism 90 (in FIG. 14, when the cutting height is set to H3), the transmission case 7, the engine 8 and the cutting blade 10 are inclined downward by an angle α from the horizontal level. Become.

すなわち、エンジン8を駆動させて前後進切替レバー26を前進側又は後進側に切り替え、走行機体1を前進又は後進させると、刈高さ調節機構90により設定した刈高さに刈刃10が自動的に揺動し、予め刈高さ調節機構90により設定された刈刃10の刈高さで刈取作業を行うことができる。   That is, when the engine 8 is driven to switch the forward / reverse switching lever 26 to the forward side or the reverse side and the traveling machine body 1 is moved forward or backward, the cutting blade 10 is automatically set to the cutting height set by the cutting height adjustment mechanism 90. The cutting operation can be performed at the cutting height of the cutting blade 10 set in advance by the cutting height adjusting mechanism 90.

上記のように、刈刃10を前下がり傾斜又は後下がり傾斜させて草を刈り取ることにより、刈刃10の前下がり傾斜又は後下がり傾斜させた下端部(前端部又は後端部)が最も草(地面)に近い位置になり、その位置から走行方向に対しての逆方向に向かうに従って、刈刃10と刈刃10の下側を通過する草(地面)との間の隙間が徐々に広くなる。その結果、刈刃10の下面側と刈刃10の下側を通過する草(地面)との接触面積が小さくなり、刈刃10の下面側に作用する刈り取った草(地面)からの抵抗が小さくなって、草を刈り取る際における刈刃10に作用する負荷を軽減することができる。   As described above, the lower end portion (front end portion or rear end portion) of the cutting blade 10 which is inclined forwardly or backwardly downward by cutting the grass with the cutting blade 10 tilted forwardly or backwardly is most grass. The gap between the cutting blade 10 and the grass (ground) passing below the cutting blade 10 gradually becomes wider as the position becomes closer to the (ground) and moves in the opposite direction to the traveling direction from that position. Become. As a result, the contact area between the lower surface side of the cutting blade 10 and the grass (ground) passing through the lower side of the cutting blade 10 is reduced, and the resistance from the cut grass (ground) acting on the lower surface side of the cutting blade 10 is reduced. It becomes small and the load which acts on the cutting blade 10 at the time of cutting grass can be reduced.

その結果、例えば刈刃10が地面と略水平な状態で草を刈り取るように構成する場合に比べ、刈刃10を回転駆動させる動力(草を刈り取る動力)が小さくなって、エンジン8の小型化及び軽量化を実現でき(例えば草を刈り取る能力を確保しながら馬力の小さいエンジンに設定することができ)、歩行型草刈機のコンパクト化及び軽量化を実現できる。   As a result, for example, the power for driving the cutting blade 10 to rotate (the power for cutting the grass) is reduced compared to a case where the cutting blade 10 is configured to cut grass in a state of being substantially horizontal with the ground, and the engine 8 is downsized. In addition, the weight reduction can be realized (for example, an engine with a small horsepower can be set while securing the ability to cut grass), and the walking-type grass mower can be made compact and lightweight.

[発明の実施の第1別形態]
前述の[発明を実施するための最良の形態]においては、ブラケット91と、ブラケット92とに亘って連係ロッド93を連係することで刈高さ調節機構90を構成した例を示したが、刈高さ調節機構90として異なる機構を採用してもよく、例えば機体フレーム2側に、揺動するエンジン8又は伝動ケース7の揺動範囲の上限を規制する規制具(図示せず)を設けるように、刈高さ調節機構90を構成してもよい。
[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], the example in which the cutting height adjusting mechanism 90 is configured by connecting the connecting rod 93 across the bracket 91 and the bracket 92 has been shown. A different mechanism may be employed as the height adjusting mechanism 90. For example, a restricting tool (not shown) that restricts the upper limit of the swing range of the swinging engine 8 or the transmission case 7 is provided on the body frame 2 side. In addition, the cutting height adjusting mechanism 90 may be configured.

前述の[発明を実施するための最良の形態]においては、刈刃10による刈高さを3段階で変更調節できるように、刈高さ調節機構90を構成した例を示したが、刈刃10による刈高さを異なる段階(例えば2段階のように少ない段階、又は4段階,5段階等のように多い段階)で変更調節できるように、刈高さ調節機構90を構成してもよい。   In the above-mentioned [Best Mode for Carrying Out the Invention], the example in which the cutting height adjusting mechanism 90 is configured so that the cutting height by the cutting blade 10 can be changed and adjusted in three stages has been shown. The cutting height adjusting mechanism 90 may be configured so that the cutting height according to 10 can be changed and adjusted at different stages (for example, as few as two stages, or as many as four, five, etc.). .

また、刈刃10による刈高さを段階的に変更調節するのではなく、無段階で変更調節できるように、刈高さ調節機構90を構成してもよく、このように構成することで、刈刃10による刈高さの微調節を行うことができ、刈取作業の作業性を更に向上できる。   In addition, the cutting height adjustment mechanism 90 may be configured so that the cutting height by the cutting blade 10 can be changed and adjusted steplessly, instead of changing the cutting height stepwise. Fine adjustment of the cutting height by the cutting blade 10 can be performed, and the workability of the cutting work can be further improved.

具体的には、例えば、揺動しない機体フレーム2側に、揺動するエンジン8又は伝動ケース7の揺動範囲の上限を規制する規制具(図示せず)を設け、この規制具を調節することによりエンジン8又は伝動ケース7の揺動範囲の上限を無段階で規制するように、刈高さ調節機構90を構成する。   Specifically, for example, a restricting tool (not shown) that restricts the upper limit of the swing range of the swinging engine 8 or the transmission case 7 is provided on the side of the body frame 2 that does not swing, and this restricting tool is adjusted. Accordingly, the cutting height adjusting mechanism 90 is configured so that the upper limit of the swing range of the engine 8 or the transmission case 7 is steplessly regulated.

[発明の実施の第別形態]
前述の[発明を実施するための最良の形態]及び[発明の実施の第別形態]における刈刃10に代えて、バーブレード(図示せず)を採用してもよい。
[ Second Embodiment of the Invention]
Instead of the cutting blade 10 in the above [BEST MODE FOR CARRYING OUT THE INVENTION]及 beauty First alternative embodiment of the invention, may be employed bar blade (not shown).

前述の[発明を実施するための最良の形態]、[発明の実施の第1別形態]、[発明の実施の第2別形態]における前輪5及び後輪6に代えて、車輪を3点配置した3輪走行仕様(図示せず)に構成してもよく、クローラ走行装置(図示せず)に構成してもよい。 BEST MODE FOR CARRYING OUT THE INVENTION foregoing, [first alternative embodiment of the invention, instead of the front wheels 5 and rear wheels 6 definitive in the second alternative embodiment of the invention, the wheel 3 You may comprise in the point arrangement | positioning three-wheel traveling specification (not shown), and you may comprise in a crawler traveling apparatus (not shown).

前述の[発明を実施するための最良の形態]、[発明の実施の第1別形態]、[発明の実施の第2別形態]においては、伝動ケース7の上部にエンジン8を連動連結して原動部Eを構成した例に示したが、原動部Eとして異なる構成を採用してもよく、例えばエンジン8に代えてバッテリーや商用電源等の電力により駆動する電動モータ(図示せず)を採用してもよい。 BEST MODE FOR CARRYING OUT THE INVENTION foregoing, [first alternative embodiment of the invention, Oite to the second alternative embodiment of the invention] is linked to the engine 8 to the top of the transmission case 7 Although shown in the example which connected and comprised the drive part E, you may employ | adopt a different structure as the drive part E, for example instead of the engine 8, the electric motor (not shown) driven by electric power, such as a battery and a commercial power source, is shown. ) May be adopted.

前述の[発明を実施するための最良の形態]、[発明の実施の第1別形態]、[発明の実施の第2別形態]においては、伝動ケース7の上部にエンジン8を連動連結して原動部Eを構成した例に示したが、伝動ケース7とエンジン8とを一体構成した原動部E(図示せず)を採用してもよい。また、簡易には、伝動ケース7を省略して原動部Eをエンジン8のみで構成してもよい(図示せず)。この場合、エンジン8から走行装置(車輪等)への左右向きの駆動軸及び揺動支軸を延出し、エンジン8の下部から刈刃10への下向きの伝動軸を延出して、エンジン8を機体フレーム2に左右軸心周りに揺動可能に支持する(図示せず)。 BEST MODE FOR CARRYING OUT THE INVENTION foregoing, [first alternative embodiment of the invention, Oite to the second alternative embodiment of the invention] is linked to the engine 8 to the top of the transmission case 7 Although shown in the example which connected and comprised the drive part E, you may employ | adopt the drive part E (not shown) which comprised the transmission case 7 and the engine 8 integrally. Further, for simplicity, the transmission case 7 may be omitted, and the driving part E may be configured by only the engine 8 (not shown). In this case, the drive shaft and the swinging support shaft extending in the left-right direction from the engine 8 to the traveling device (wheels and the like) are extended, and the downward transmission shaft from the lower portion of the engine 8 to the cutting blade 10 is extended. The body frame 2 is supported so as to be swingable around the left and right axis (not shown).

歩行型草刈機の全体左側面図Overall left side view of walking mower 歩行型草刈機の全体平面図Overall plan view of walking type mower 走行機体の縦断左側面図Longitudinal left side view of traveling aircraft 走行機体の横断平面図Cross-sectional plan view of traveling aircraft 走行機体の縦断背面図Longitudinal rear view of traveling aircraft 前輪及び後輪の支持構造を説明する縦断背面図A longitudinal rear view for explaining the support structure of the front and rear wheels 可動飛散防止カバーの構造を説明する縦断側面図Vertical side view explaining the structure of the movable shatterproof cover 刈刃の構造を説明する横断平面図Cross-sectional plan view explaining the structure of the cutting blade 歩行型草刈機の伝動系統図Transmission system diagram of walking type mower 歩行型草刈機の伝動構造を示す縦断背面図Longitudinal rear view showing the power transmission structure of a walking mower 歩行型草刈機の伝動構造を示す横断平面図Cross-sectional plan view showing the transmission structure of a walking type mower 刈刃クラッチの斜視図Perspective view of cutting blade clutch 前進させた場合における刈刃の傾斜状況を説明する概略左側面図Schematic left side view explaining the state of inclination of the cutting blade when moved forward 後進させた場合における刈刃の傾斜状況を説明する概略左側面図Schematic left side view explaining the state of inclination of the cutting blade when it is moved backward

1 走行機体
10 刈刃
91B,91C 長穴
90 刈高さ調節機構
93 連係部材
E 原動部
P1 軸心(左右軸心)
P2 軸心(上下軸心)
α 前下がり傾斜角度
1 traveling machine body 10 cutting blade
91B, 91C oblong hole
90 cutting height adjustment mechanism
93 linkage member E prime mover P1 axis (left and right axis)
P2 axis (vertical axis)
α Forward tilt angle

Claims (1)

走行機体に原動部を備え、前記原動部の下部に刈刃を上下軸心周りに回動自在に連結してある歩行型草刈機において、
前記刈刃の前側が下方に揺動した前下がり傾斜姿勢となるように、かつ前記刈刃の後側が下方に揺動した後下がり傾斜姿勢となるように、前記原動部を左右軸心周りで前記走行機体に支持すると共に、
前記原動部及び刈刃を一体で前記左右軸心周りに姿勢変更することにより、前記前下がり傾斜姿勢での前記刈刃の前下がり傾斜角度及び前記後下がり傾斜姿勢での前記刈刃の後下がり傾斜角度を変更自在に構成し
走行機体側と原動部側の一方に設けた長さが異なる複数の長穴、及び前記複数の長穴に択一的に移動自在に連係する状態で走行機体側と原動部側の他方に設けた連係部材を備えて、刈高さ調節機構を構成してある歩行型草刈機。
In a walking type grass mower having a driving unit in a traveling machine body and a cutting blade connected to a lower part of the driving unit so as to be rotatable around a vertical axis,
The driving unit is arranged around the left and right axis so that the front side of the cutting blade swings downward and swings downward and the rear side of the cutting blade swings downward and tilts downward. While supporting the traveling machine body,
By changing the posture of the driving unit and the cutting blade integrally around the left and right axial centers, the cutting blade has a forward downward inclination angle in the forward downward inclination posture and a rear falling of the cutting blade in the rear downward inclination posture. The tilt angle can be changed freely ,
Provided on the other side of the traveling machine body side and the driving part side in a state of being movably linked to the plurality of elongated holes, which are provided on one side of the traveling machine body side and the driving part side, and having a different length. A walk-type grass mower having a linkage height adjustment mechanism .
JP2007204676A 2007-08-06 2007-08-06 Walking mower Active JP5139743B2 (en)

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JP2007204676A JP5139743B2 (en) 2007-08-06 2007-08-06 Walking mower
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KR1020080076272A KR100974379B1 (en) 2007-08-06 2008-08-05 Walk-behind-type mower
TW097129683A TWI353817B (en) 2007-08-06 2008-08-05 Walk-behind-type mower

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