JP2005271799A - Operation part structure of working vehicle - Google Patents

Operation part structure of working vehicle Download PDF

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JP2005271799A
JP2005271799A JP2004089911A JP2004089911A JP2005271799A JP 2005271799 A JP2005271799 A JP 2005271799A JP 2004089911 A JP2004089911 A JP 2004089911A JP 2004089911 A JP2004089911 A JP 2004089911A JP 2005271799 A JP2005271799 A JP 2005271799A
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lever
guide groove
guide
retraction
groove
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JP4278546B2 (en
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Hiroshi Shimada
宏 島田
Akira Minoura
章 箕浦
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Kubota Corp
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Kubota Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation part structure of a working vehicle constituted capable of operating to retreat an operation lever 12 to a retreating guide groove 41 from an operation guide groove 30 to operate an operating object, which is devised capable of operating the operation lever 12 to retreat to the retreating guide groove 41 even when a connecting angle against a lever supporting shaft of the operation lever 12 is changed and covering a clearance between the operation lever 12 and a lever guide 29 in the retreating guide groove 41 of the lever guide 29. <P>SOLUTION: A guide groove cover 40 is provided in the retreating guide groove 41 of the lever guide 29. The retreating guide groove 41 of groove lateral width W1 narrower than groove lateral width W2 of a retreating guide groove 31 of the lever guide 29 is provided on the guide groove cover 40. The guide groove cover 40 is constituted free to control to move in a direction along the operation guide groove 30 of the lever guide 29. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、操作レバーをレバー支軸の軸芯まわりでレバーガイドの操作ガイド溝に沿わせて揺動操作して操作対象物を操作するように構成し、前記操作レバーを前記レバー支軸芯と非平行な軸芯まわりで前記レバーガイドの前記操作ガイド溝と直交する方向の退避ガイド溝に沿わせて揺動操作して前記操作ガイド溝に対して出入りさせるように構成し、前記操作レバーの前記レバー支軸に対する連結角度を前記レバー支軸芯と平行な軸芯まわりで変更するための角度調節部を設けた作業車の操作部構造に関する。   The present invention is configured to operate the operation target by swinging the operation lever around the lever guide shaft along the operation guide groove of the lever guide, and the operation lever is the lever support shaft. The operation lever is configured to swing in and out of the operation guide groove along a retraction guide groove in a direction orthogonal to the operation guide groove of the lever guide around an axis parallel to the operation guide groove. The present invention relates to an operating part structure of a work vehicle provided with an angle adjusting part for changing a connecting angle of the lever to the lever spindle around an axis parallel to the lever spindle.

たとえば、操作レバーを運転部に設けるのに、握り部が運転座席の直前方に位置した状態にしながら揺動操作することができるようにして設けると、運転座席に着座したり運転座席から離れたりする際、握り部が障害物になりやすくなるが、上記操作部構造にあっては、操作レバーを操作ガイド溝に沿わせて揺動操作して操作対象物を操作する際、操作レバーの握り部が運転座席の直前方に位置することになっても、操作レバーをレバー支軸芯と非平行な軸芯まわりで揺動操作して操作ガイド溝から退避ガイド溝に退避させることにより、操作レバーの握り部が運転座席の前方から横側方に移動することになり、握り部が運転座席の直前方に位置した状態にしながら操作レバーを揺動操作することも、握り部を運転座席の前方から横側に障害物になりにくいように退避させることも可能になったものである。   For example, when the operating lever is provided in the driving part, if the gripping part is provided so that it can be swung while being positioned in front of the driving seat, it may be seated on the driving seat or separated from the driving seat. When operating the operating object by swinging the operating lever along the operating guide groove, the gripping part of the operating lever is likely to become an obstacle. Even if the part is located immediately in front of the driver's seat, the operation lever can be swung around the axis that is not parallel to the lever support shaft and retracted from the operation guide groove to the retraction guide groove. The lever grip moves from the front of the driver seat to the side, and the control lever can be swung while the handle is positioned just in front of the driver seat. Obstacle from front to side It is intended also becomes possible to retract to less likely to.

また、上記操作部構造にあっては、角度調節部によって操作レバーのレバー支軸に対する連結角度を変更すれば、操作レバーが基準位置に位置した際の操作レバーのレバー支軸からの延出向きが変化し、操作レバーの握り部を運転座席に対して近づけたり離したりするなどの調節をすることできるものである。
このため、退避ガイド溝の溝横幅として、退避ガイド溝に出入りする操作レバーの太さに比して大きい溝横幅を設定しておく必要がある。
なぜならば、操作レバーが基準位置に位置した際の操作レバーのレバー支軸からの延出向きを変更すると、操作レバーを操作ガイド溝から退避させるべく揺動操作した際、操作レバーは、連結角度の変更を行なう前に比べ、変更した角度に対応する分だけ退避ガイド溝に対して操作ガイド溝に沿った方向に位置ずれした状態で退避ガイド溝に入っていくからである。
Further, in the above-described operation portion structure, if the connection angle of the operation lever with respect to the lever support shaft is changed by the angle adjusting portion, the extending direction of the operation lever from the lever support shaft when the operation lever is located at the reference position is changed. It is possible to make adjustments such as moving the grip of the operation lever closer to or away from the driver's seat.
For this reason, it is necessary to set a groove width that is larger than the thickness of the operation lever that goes in and out of the retraction guide groove as the groove width of the retraction guide groove.
This is because, when the extending direction of the operating lever from the lever support shaft when the operating lever is positioned at the reference position is changed, when the operating lever is swung to retract from the operating guide groove, the operating lever This is because, compared to before the change, the retraction guide groove enters the retraction guide groove with a position shifted in the direction along the operation guide groove by an amount corresponding to the changed angle.

従来、たとえば特許文献1に示されるように、操作レバー10の基端部を覆うように構成してレバーガイドの上面側に連結された蛇腹状のブーツ12を設け、レバーガイドのガイド溝をカバーするものがあった。   Conventionally, for example, as shown in Patent Document 1, a bellows-like boot 12 configured to cover the base end portion of the operation lever 10 and connected to the upper surface side of the lever guide is provided to cover the guide groove of the lever guide. There was something to do.

特開2003−153627号公報(〔0035〕欄、図2,4,5)JP 2003-153627 A ([0035] column, FIGS. 2, 4 and 5)

従来のカバー手段を採用して上記退避ガイド溝をカバーすると、たとえば操作レバーが運転座席の前方に位置するものであれば、カバーがレバーガイドの上面側に嵩が大きい状態で存在し、見通しの障害になることがあった。また、操作レバーの角度調節を行なう際、カバーの取り外しに手間が掛かって作業能率が悪くなることもあった。   When the conventional guide means is used to cover the retraction guide groove, for example, if the operating lever is located in front of the driver's seat, the cover is present in a bulky state on the upper surface side of the lever guide, There was an obstacle. In addition, when adjusting the angle of the operation lever, it may take time to remove the cover, resulting in poor work efficiency.

本発明の目的は、上記した視界面などの問題点を改善しながら退避ガイド溝をカバーすることができる作業車の操作部構造を提供することにある。   An object of the present invention is to provide an operation unit structure of a work vehicle that can cover a retraction guide groove while improving the problems such as the visual interface described above.

本第1発明にあっては、操作レバーをレバー支軸の軸芯まわりでレバーガイドの操作ガイド溝に沿わせて揺動操作して操作対象物を操作するように構成し、前記操作レバーを前記レバー支軸芯と非平行な軸芯まわりで前記レバーガイドの前記操作ガイド溝と直交する方向の退避ガイド溝に沿わせて揺動操作して前記操作ガイド溝に対して出入りさせるように構成し、前記操作レバーの前記レバー支軸に対する連結角度を前記レバー支軸芯と平行な軸芯まわりで変更するための角度調節部を設けた作業車の操作部構造において、
前記レバーガイド側の退避ガイド溝の内部に位置するとともに前記レバーガイド側の退避ガイド溝の溝横幅より狭い溝横幅の退避ガイド溝を備えたガイド溝カバーを、前記レバーガイドに対して前記操作ガイド溝に沿う方向に移動調節自在に設けてある。
In the first invention, the operation lever is swing-operated around the axis of the lever support shaft along the operation guide groove of the lever guide to operate the operation target, and the operation lever is The lever guide is configured to swing in and out of the operation guide groove around a retraction guide groove in a direction orthogonal to the operation guide groove of the lever guide around an axis that is not parallel to the lever support shaft. In the operation part structure of the work vehicle provided with an angle adjustment part for changing the connection angle of the operation lever with respect to the lever support axis around an axis parallel to the lever support axis,
A guide groove cover that is located inside the retraction guide groove on the lever guide side and has a retraction guide groove having a groove lateral width that is narrower than the lateral width of the retraction guide groove on the lever guide side is provided with respect to the lever guide. It is provided so as to be movable and adjustable in the direction along the groove.

すなわち、角度調節部によって操作レバーのレバー支軸に対する連結角度を変更した場合、その変更に対応した適切な方向に、その変更角度に対応した適切なストロークだけガイド溝カバーをレバーガイドに対して移動調節し、ガイド溝カバーの退避ガイド溝を、レバーガイドの退避ガイド溝に対して操作ガイド溝に沿った方向に移動調節してレバーガイド側の退避ガイド溝内の適切な部位に位置させる。すると、操作レバーを操作ガイド溝から退避させるべく揺動操作すると、操作レバーがガイド溝カバーの退避ガイド溝に入り込むことになり、操作レバーをレバーガイドの退避ガイド溝に入り込ませて操作ガイド溝から退避させることができる。そして、冒頭に記した如くレバーガイドの退避ガイド溝の溝横幅を操作レバーの太さに比して大きい溝横幅に設定する必要があることに起因してレバーガイドの退避ガイド溝の内部に操作レバーとレバーガイドの隙間が形成されるが、また、角度調節部によって操作レバーの連結角度変更を行なえば、レバーガイド側の退避ガイド溝内に形成される操作レバーとレバーガイドの隙間は、操作レバーの退避ガイド溝の溝横幅方向での両側に形成されたり、片側に形成されたりすることになるが、ガイド溝カバーが移動することにより、かつ、ガイド溝カバーの退避ガイド溝の溝横幅がレバーガイドの退避ガイド溝の溝横幅より狭いことにより、操作レバーとレバーガイドの隙間の大きさや位置の変化にかかわらず、ガイド溝カバーが操作レバーとレバーガイドの隙間に位置してその隙間をカバーする。
これにより、ガイド溝カバーをレバーガイドに沿わせて移動自在に設けて、ガイド溝カバーがレバーガイドの表面側に嵩高に存在しないようにしながら、レバーガイドの退避ガイド溝内に形成される操作レバーとレバーガイドの隙間をガイド溝カバーによってカバーすることができる。
That is, if the angle of the connecting lever to the lever spindle is changed by the angle adjuster, the guide groove cover is moved relative to the lever guide by an appropriate stroke corresponding to the changed angle in an appropriate direction corresponding to the change. By adjusting, the retraction guide groove of the guide groove cover is moved and adjusted in the direction along the operation guide groove with respect to the retraction guide groove of the lever guide, and is positioned at an appropriate portion in the retraction guide groove on the lever guide side. Then, when the operation lever is swung to retract from the operation guide groove, the operation lever enters the retraction guide groove of the guide groove cover, and the operation lever enters the retraction guide groove of the lever guide and moves from the operation guide groove. Can be evacuated. Then, as described at the beginning, the groove width of the retraction guide groove of the lever guide needs to be set to a groove width larger than the thickness of the operation lever. A gap is formed between the lever and the lever guide. If the angle adjustment part is used to change the connecting angle of the operating lever, the gap between the operating lever and the lever guide formed in the retract guide groove on the lever guide side It is formed on both sides in the groove lateral width direction of the retracting guide groove of the lever, or it is formed on one side, but the lateral width of the retracting guide groove of the guide groove cover is reduced by the movement of the guide groove cover. Narrower than the horizontal width of the retraction guide groove of the lever guide, the guide groove cover can be operated regardless of the size or position of the gap between the operation lever and the lever guide. Located in the lever guide gap covering the gap.
As a result, the guide groove cover is movably provided along the lever guide so that the guide groove cover is not bulky on the surface side of the lever guide, and the operation lever is formed in the retraction guide groove of the lever guide. The gap between the lever guide and the lever guide can be covered by the guide groove cover.

従って、本第1発明によれば、レバーガイドの退避ガイド溝における操作レバーとレバーガイドの隙間をガイド溝カバーによってカバーすることができるものでありながら、レバーガイドの表面側に嵩高い障害物ができなくて良好な見通しを確保することができる。また、操作レバーの角度調節を行なうに当たり、ガイド溝カバーにあっては退避ガイド溝を利用して操作レバーから分離させるなど従来のブーツに比して容易に取り外して能率よく作業をすることができる。   Therefore, according to the first aspect of the present invention, the gap between the operating lever and the lever guide in the retracting guide groove of the lever guide can be covered by the guide groove cover, but a bulky obstacle is present on the surface side of the lever guide. It is impossible to secure a good prospect. Further, when adjusting the angle of the operation lever, the guide groove cover can be easily removed by removing it from the operation lever by using the retraction guide groove, so that the work can be efficiently performed. .

以下、本発明の実施例を図面に基づいて説明する。
図1,2に示すように、左右一対の遊転自在なキャスタ型の前車輪1、左右一対の駆動自在な後車輪2、車体後部に位置するエンジン3を有した原動部、この原動部の前側に位置する運転座席4を有した搭乗型の運転部を備えた自走車体の前後輪間に、モーア5をリンク機構6を介して昇降操作自在に連結するとともに、前記エンジン3の駆動力をモーア5に伝達するように構成して、乗用型の草刈り機を構成してある。
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a pair of left and right freely caster-type front wheels 1, a pair of left and right driveable rear wheels 2, a prime mover having an engine 3 located at the rear of the vehicle body, A mower 5 is connected to the front and rear wheels of a self-propelled vehicle body having a boarding type driving unit having a driver seat 4 located on the front side via a link mechanism 6 so as to be movable up and down, and the driving force of the engine 3 Is transmitted to the mower 5 to constitute a riding type mower.

図3に示すように、前記エンジン3の出力軸3aの駆動力を回転軸7を介してミッションケース8の入力軸8aに伝達し、このミッションケース8の走行用出力軸8bの駆動力を、前記ミッションケース8の両横側に連結している静油圧式の無段変速装置9に伝達し、左側の無段変速装置9の出力を左側の後輪駆動ケース10の内部に位置する減速機構10aを介して左側の後輪2に伝達し、前記右側の無段変速装置9の出力を右側の後輪駆動ケース10の内部に位置する減速機構10aを介して右側の後輪2に伝達するように構成してある。
尚、図3に示す作業クラッチ11は、エンジン3からミッションケース8に伝達された駆動力をモーア5に対して入り切り自在に伝達するものである。
As shown in FIG. 3, the driving force of the output shaft 3a of the engine 3 is transmitted to the input shaft 8a of the transmission case 8 via the rotary shaft 7, and the driving force of the traveling output shaft 8b of the transmission case 8 is A reduction mechanism that transmits to the hydrostatic continuously variable transmission 9 connected to both sides of the transmission case 8 and positions the output of the left continuously variable transmission 9 inside the rear wheel drive case 10 on the left. 10a is transmitted to the left rear wheel 2 and the output of the right continuously variable transmission 9 is transmitted to the right rear wheel 2 via the speed reduction mechanism 10a located inside the right rear wheel drive case 10. It is constituted as follows.
The work clutch 11 shown in FIG. 3 transmits the driving force transmitted from the engine 3 to the transmission case 8 to the mower 5 so as to be freely turned on and off.

前記左後輪2に動力伝達する前記無段変速装置9は、図2に示す如く運転部の運転座席4の前端側の両横側に振り分け配置した左右一対の操作レバー12,12のうちの左側の操作レバー12によって変速操作するように構成し、前記右後輪2に動力伝達する前記無段変速装置9は、前記左右一対の操作レバー12,12のうちの右側の操作レバー12によって変速操作するように構成してある。   The continuously variable transmission 9 for transmitting power to the left rear wheel 2 includes a pair of left and right operation levers 12 and 12 arranged on both sides of the front end side of the driver seat 4 of the driver as shown in FIG. The continuously variable transmission 9 configured to perform a speed change operation by the left operation lever 12 and transmitting power to the right rear wheel 2 is changed by the right operation lever 12 of the pair of left and right operation levers 12 and 12. It is configured to operate.

前記左側の操作レバー12は、図4,6,7に示す操作部構造に基いて運転部に設置してある。   The left operating lever 12 is installed in the operating section based on the operating section structure shown in FIGS.

すなわち、車体横向きのレバー支軸20を、車体に固定された左右一対の支持ブラケット21に回動自在に支持させ、前記レバー支軸20の一端側に板金部材を付設して一体回動自在に設けたレバー支持部22から中継アーム23を車体上方向きに延出させ、この中継アーム23の延出端側に固設されたレバー連結板24に、操作レバー12の基端側を連結してある。前記中継アーム23の基端側が、レバー支持部22の前後一対の支持板の間に入り込んでいるとともに車体前後向きの連結ボルト25を介して前記レバー支持部22に対して回動自在に連結しており、中継アーム23は、レバー支軸20の軸芯20aのまわりではレバー支軸20と共に回動し、前記連結ボルト25の軸芯25aのまわりではレバー支軸20に対して揺動するようになっている。前記レバー支持部22に円弧形状の角度設定長孔26を設けるとともに、この角度設定長孔26を摺動自在に挿通した位置決めピン27を中継アーム23に連結してあり、中継アーム23が軸芯25aまわりでレバー支軸20に対して揺動する際の揺動範囲が位置決めピン27と角度設定長孔26とによって設定されるようになっている。図5に示すように、後輪フェンダー28の前端部の上面側に設けたレバーガイド29に、操作レバー12の前記中継アーム23のレバー連結板24に連結する部分よりも先端側に位置する部分に対して案内作用する車体前後向きの操作ガイド溝30、及び、この操作ガイド溝30の中間部に連通する車体横向きの退避ガイド溝31を設けてある。前記レバーガイド29の前記退避ガイド溝31の内部に位置する退避ガイド溝41を備えたガイド溝カバー40を、前記レバーガイド29の裏面側に設けてある。   That is, the lever support shaft 20 facing the vehicle body is rotatably supported by a pair of left and right support brackets 21 fixed to the vehicle body, and a metal plate member is attached to one end side of the lever support shaft 20 so as to be integrally rotatable. The relay arm 23 is extended upward from the provided lever support portion 22, and the base end side of the operation lever 12 is connected to the lever connecting plate 24 fixed to the extension end side of the relay arm 23. is there. A base end side of the relay arm 23 is inserted between a pair of front and rear support plates of the lever support portion 22 and is rotatably connected to the lever support portion 22 via a connecting bolt 25 facing the front and rear of the vehicle body. The relay arm 23 rotates together with the lever support shaft 20 around the axis 20a of the lever support shaft 20, and swings with respect to the lever support shaft 20 around the shaft core 25a of the connecting bolt 25. ing. The lever support portion 22 is provided with an arc-shaped angle setting long hole 26, and a positioning pin 27 slidably inserted through the angle setting long hole 26 is connected to the relay arm 23. The swinging range when swinging with respect to the lever support shaft 20 around 25 a is set by the positioning pin 27 and the angle setting long hole 26. As shown in FIG. 5, the lever guide 29 provided on the upper surface side of the front end portion of the rear wheel fender 28 is located on the front end side of the portion of the operation lever 12 connected to the lever connecting plate 24 of the relay arm 23. An operation guide groove 30 facing the vehicle body that guides the vehicle and a retraction guide groove 31 facing the vehicle body that communicates with an intermediate portion of the operation guide groove 30 are provided. A guide groove cover 40 having a retraction guide groove 41 located inside the retraction guide groove 31 of the lever guide 29 is provided on the back side of the lever guide 29.

前記レバー支軸20の前記レバー支持部22が位置する側とは反対側の端部に一体回動自在に連結している揺動リンク32の操作アーム部32aを連動ロッド33を介して無段変速装置9の操作部(図示せず)に連動させてある。前記揺動リンク32の前記操作アーム部32aに設けた長孔32bに一端側が連結したバネ支持ロッド34に速度設定バネ35を装着してある。この速度設定バネ35は、前記バネ支持ロッド34の他端側を摺動自在に支持するばね受け部材36を反力点にしてバネ支持ロッド34を介して揺動リンク32を車体前方側に揺動付勢し、これにより、操作レバー12を中立位置Nから車体前方側に移動して前進域Fに若干入った設定前進低速位置f(図5参照)に揺動操作するとともに、無段変速装置9が中立状態に自動復帰するように備えている復元力と、速度設定バネ35による付勢力との釣り合いによって操作レバー12を前記設定前進低速位置fに保持するように構成してある。前記揺動リンク32のアーム部32cにダンパー37を連結してある。   An operation arm portion 32 a of a swing link 32 that is connected to an end portion of the lever support shaft 20 opposite to the side on which the lever support portion 22 is located so as to be integrally rotatable is continuously variable via an interlocking rod 33. It is interlocked with an operation part (not shown) of the transmission 9. A speed setting spring 35 is attached to a spring support rod 34 having one end connected to a long hole 32b provided in the operation arm portion 32a of the swing link 32. The speed setting spring 35 swings the swing link 32 forward of the vehicle body via the spring support rod 34 with the spring receiving member 36 that slidably supports the other end of the spring support rod 34 as a reaction point. As a result, the operation lever 12 is moved from the neutral position N to the front side of the vehicle body and swings to the set forward low speed position f (see FIG. 5) slightly entering the forward travel area F, and the continuously variable transmission. The operation lever 12 is held at the set forward low speed position f by balancing the restoring force provided to automatically return to the neutral state and the biasing force by the speed setting spring 35. A damper 37 is connected to the arm portion 32 c of the swing link 32.

すなわち、操作レバー12をレバー支軸20の車体横向きの軸芯20aのまわりで操作ガイド溝30に沿わせて車体前後方向に揺動操作すると、レバー支軸20が操作レバー12と共に回動して揺動リンク32を揺動操作し、この揺動リンク32の操作アーム部32aが連動ロッド33を介して無段変速装置9の操作部を操作するようになっており、操作レバー12を中立位置Nに操作すると、無段変速装置9が左後輪2に対する伝動を絶つ中立状態になり、操作レバー12を中立位置Nより車体前方側の前進域Fに操作すると、無段変速装置9が左後輪2に対して前進駆動力を伝達するように前進状態になり、操作レバー12を中立位置Nから車体後方側に操作すると、無段変速装置9が左後輪2に対して後進駆動力を伝達するように後進状態になる。そして、操作レバー12を中継リンク23が車体側に固定されたストッパー38の前進側作用部38aに当接するまで車体前方側に操作すると、無段変速装置9が前進状態での最高速度になり、操作レバー12を中継リンク23が前記ストッパー38の後進側作用部38bに当接するまで車体後方側に操作すると、無段変速装置9が後進状態での最高速度になる。   That is, when the operation lever 12 is swung in the longitudinal direction of the vehicle body along the operation guide groove 30 around the lateral axis 20a of the lever support shaft 20, the lever support shaft 20 rotates together with the operation lever 12. The swing link 32 is swung, and the operation arm portion 32a of the swing link 32 operates the operation portion of the continuously variable transmission 9 via the interlocking rod 33, and the operation lever 12 is moved to the neutral position. When N is operated, the continuously variable transmission 9 is in a neutral state where transmission to the left rear wheel 2 is cut off. When the operating lever 12 is operated from the neutral position N to the forward region F on the front side of the vehicle body, the continuously variable transmission 9 is moved to the left. When the forward drive state is transmitted so as to transmit the forward drive force to the rear wheel 2 and the operation lever 12 is operated from the neutral position N to the rear side of the vehicle body, the continuously variable transmission 9 applies the reverse drive force to the left rear wheel 2. Reverse to communicate It becomes state. When the operation lever 12 is operated to the front side of the vehicle body until the relay link 23 comes into contact with the forward side action portion 38a of the stopper 38 fixed to the vehicle body side, the continuously variable transmission 9 becomes the maximum speed in the forward state, When the operation lever 12 is operated to the rear side of the vehicle body until the relay link 23 comes into contact with the reverse acting portion 38b of the stopper 38, the continuously variable transmission 9 has the maximum speed in the reverse state.

操作レバー12を前記速度設定バネ35に抗して中立位置Nに維持させながら、レバー支軸20の軸芯20aに対して非平行な前記連結ボルト25の車体前後向きの軸芯25aのまわりで車体横方向に揺動操作すると、操作レバー12が中継アーム23と共に軸芯25aのまわりでレバー支軸20に対して揺動し、操作ガイド溝30から横外側に外れてレバーガイド29の退避ガイド溝31に入り込んだり、レバーガイド29の退避ガイド溝31から車体内側に外れて操作ガイド溝30に戻ったりするようになっている。操作レバー12がレバーガイド29の退避ガイド溝31に入り込んだ際、前記ガイド溝カバー40の退避ガイド溝41に入り込み、ガイド溝カバー40が操作レバー12を中立位置Nに前記速度設定バネ35による付勢力や無段変速装置9の復元力に抗して受け止め支持するように構成してある。   While maintaining the operation lever 12 at the neutral position N against the speed setting spring 35, the connecting bolt 25 is not parallel to the axis 20 a of the lever support shaft 20 around the axis 25 a facing the vehicle body. When the swinging operation is performed in the lateral direction of the vehicle body, the operation lever 12 swings with the relay arm 23 around the shaft core 25a with respect to the lever support shaft 20, and comes out of the operation guide groove 30 laterally outside to retract the lever guide 29. It enters into the groove 31, or comes back inside the vehicle body from the retraction guide groove 31 of the lever guide 29 and returns to the operation guide groove 30. When the operation lever 12 enters the retraction guide groove 31 of the lever guide 29, the operation lever 12 enters the retraction guide groove 41 of the guide groove cover 40, and the guide groove cover 40 attaches the operation lever 12 to the neutral position N by the speed setting spring 35. It is configured to receive and support against the force and the restoring force of the continuously variable transmission 9.

図6に示すように、前記右側の操作レバー12も、左側の操作レバー12の操作部構造と同様の操作部構造に基いて運転部に設置してある。左側の操作レバー12にあっては、レバーガイド29及びガイド溝カバー40の退避ガイド溝31,41が操作ガイド溝30の左横外側に位置しているのに対し、右側の操作レバー12にあっては、レバーガイド29及びガイド溝カバー40の退避ガイド溝31,41が操作ガイド溝30の右横外側に位置しているのであり、この点においてのみ左側の操作レバー12の操作部構造と、右側の操作レバー12の操作部構造とが相違している。   As shown in FIG. 6, the right operating lever 12 is also installed in the operating unit based on the same operating unit structure as the operating unit structure of the left operating lever 12. In the left operation lever 12, the lever guide 29 and the retracting guide grooves 31 and 41 of the guide groove cover 40 are located on the left lateral outer side of the operation guide groove 30. The retraction guide grooves 31 and 41 of the lever guide 29 and the guide groove cover 40 are located on the right lateral outer side of the operation guide groove 30, and only in this respect, the operation portion structure of the left operation lever 12 and The operation portion structure of the right operation lever 12 is different.

つまり、左側の操作レバー12の先端側の車体横向きの握り部12aを支持してこの左側操作レバー12を操作ガイド溝30に沿わせて車体前後方向に揺動操作して左後輪2の無段変速装置9を変速操作し、右側の操作レバー12の先端側の車体横向きの握り部12aを支持してこの右側操作レバー12を操作ガイド溝30に沿わせて車体前後方向に揺動操作して右後輪2の無段変速装置9を変速操作し、左後輪2の無段変速装置9も右後輪2の無段変速装置9も前進状態または後進状態に、同一の速度状態に変速操作することにより、左右後輪2,2が前進側または後進側に同一速度で駆動されて車体が直進前進または後進直進する。左後輪2の無段変速装置9と右後輪2の無段変速装置9の一方を前進状態に、他方を後進状態に変速操作するか、あるいは、左後輪2の無段変速装置9と右後輪2の無段変速装置9を共に前進状態または後進状態に変速操作しても、左後輪2の無段変速装置9と右後輪2の無段変速装置9の速度状態を相違させることにより、左後輪2の駆動方向と右後輪2の駆動方向が互いに逆になるか、左後輪2と右後輪2の間に速度差が発生して車体の走行向きが変化する。   In other words, the left side operation lever 12 is supported by supporting the grip portion 12a facing the vehicle body on the front end side of the left operation lever 12 and swinging the left operation lever 12 along the operation guide groove 30 in the longitudinal direction of the vehicle body. The gear shifting device 9 is operated to change the speed, and the right-hand side operation lever 12 is supported in the vehicle body side grip portion 12a on the tip side of the right-hand side operation lever 12, and the right-hand side operation lever 12 is swung in the vehicle longitudinal direction along the operation guide groove 30. Then, the continuously variable transmission 9 of the right rear wheel 2 is shifted, and the continuously variable transmission 9 of the left rear wheel 2 and the continuously variable transmission 9 of the right rear wheel 2 are set to the same speed state in the forward state or the reverse state. By performing a speed change operation, the left and right rear wheels 2 and 2 are driven at the same speed on the forward side or the reverse side, and the vehicle body advances straight forward or reversely. Either one of the continuously variable transmission 9 for the left rear wheel 2 and the continuously variable transmission 9 for the right rear wheel 2 is operated to move forward and the other is moved backward, or the continuously variable transmission 9 of the left rear wheel 2 is operated. Even if the continuously variable transmission 9 for the right rear wheel 2 and the continuously variable transmission 9 for the right rear wheel 2 are operated to shift forward or backward, the speed states of the continuously variable transmission 9 for the left rear wheel 2 and the continuously variable transmission 9 for the right rear wheel 2 are changed. By making the difference, the driving direction of the left rear wheel 2 and the driving direction of the right rear wheel 2 are opposite to each other, or a speed difference is generated between the left rear wheel 2 and the right rear wheel 2 so that the traveling direction of the vehicle body is Change.

図6に二点鎖線で示すように、左右の操作レバー12において、操作レバー12を軸芯25aまわりで車体横外側に揺動操作して操作ガイド溝30からレバーガイド29の退避ガイド溝31に退避させると、各操作レバー12の握り部12aが運転座席4の前方から横外側に移動して両操作レバー12の間に通路を確保し、その通路を通って運転座席4に着座したり、運転座席4から離れたりすることが可能になっている。このとき、各操作レバー12がガイド溝カバー40の退避ガイド溝41に入り込んでガイド溝カバー40によって中立位置Nに受け止め支持され、無段変速装置9が中立状態にロックされて車体を停止状態に維持することができるようになっている。   As shown by a two-dot chain line in FIG. 6, in the left and right operation levers 12, the operation lever 12 is swung to the laterally outer side of the vehicle body around the axis 25 a to move from the operation guide groove 30 to the retraction guide groove 31 of the lever guide 29. When retracted, the grip portion 12a of each operation lever 12 moves from the front of the driver seat 4 to the lateral outer side to secure a passage between the operation levers 12, and sits on the driver seat 4 through the passage, It is possible to move away from the driver seat 4. At this time, each operation lever 12 enters the retraction guide groove 41 of the guide groove cover 40 and is received and supported at the neutral position N by the guide groove cover 40, and the continuously variable transmission 9 is locked in the neutral state to bring the vehicle body into a stopped state. Can be maintained.

左右の操作レバー12のいずれにおいても、図7,8に示すように、操作レバー12の基端部に前記中継アーム23のレバー連結板24に対してボルト連結するように設けた連結板51の2個のボルト孔52,53の一方52を円弧形の長孔に形成し、他方のボルト孔53に装着の連結ボルト54の軸芯54aを揺動軸芯にして操作レバー12を中継アーム23に対して揺動調節することにより、操作レバー12のレバー支軸20に対する連結角度をレバー支軸20の軸芯20aと平行な前記ボルト軸芯54aのまわりで変更できるように角度調節部50を構成してある。   As shown in FIGS. 7 and 8, in both the left and right operation levers 12, a connection plate 51 provided at the base end portion of the operation lever 12 so as to be bolt-connected to the lever connection plate 24 of the relay arm 23. One of the two bolt holes 52, 53 is formed into an arc-shaped elongated hole, and the operation lever 12 is connected to the relay arm by using the shaft core 54a of the connecting bolt 54 attached to the other bolt hole 53 as the swing axis. By adjusting the swing relative to the lever 23, the angle adjusting portion 50 can be changed so that the connecting angle of the operating lever 12 with respect to the lever spindle 20 can be changed around the bolt axis 54 a parallel to the axis 20 a of the lever spindle 20. Is configured.

図5,7に示すように、前記角度調節部50によって操作レバー12のレバー支軸20に対する連結角度を変更しても、レバーガイド29の退避ガイド溝31に退避操作されてガイド溝カバー40の退避ガイド溝41に入り込んだ操作レバー12と、レバーガイド29との隙間をガイド溝カバー40によって埋めることができるように、ガイド溝カバー40の退避ガイド溝41の溝横幅W1をレバーガイド29の退避ガイド溝41の溝横幅W2よりも狭くしてある。   As shown in FIGS. 5 and 7, even if the connecting angle of the operation lever 12 with respect to the lever support shaft 20 is changed by the angle adjusting portion 50, the retraction operation is performed in the retraction guide groove 31 of the lever guide 29 and the guide groove cover 40 The groove width W1 of the retraction guide groove 41 of the guide groove cover 40 is retracted by the lever guide 29 so that the gap between the operation lever 12 entering the retraction guide groove 41 and the lever guide 29 can be filled with the guide groove cover 40. The guide groove 41 is narrower than the lateral width W2.

ガイド溝カバー40は、図7に示す連結構造によってレバーガイド29に連結するように構成してある。
すなわち、ガイド溝カバー40の両端部に連結用長孔42を設け、この各連結用長孔42に摺動自在に入り込むように構成したネジ止着突起39をレバーガイド29の裏面側に設け、ガイド溝カバー40を、前記連結用長孔42とネジ止着突起39とによって摺動案内させながらレバーガイド29に対してこれの操作ガイド溝30に沿う方向に移動させることによってレバーガイド29に対する連結位置の調節を行い、レバーガイド29の退避ガイド溝31に退避操作された操作レバー12がガイド溝カバー40の退避ガイド溝41に入り込むこととなる連結位置になれば、前記各ネジ止着突起39に装着した連結ネジ39aによってガイド溝カバー40をレバーガイド29の裏面側に締め付け固定するように構成してある。
The guide groove cover 40 is configured to be coupled to the lever guide 29 by the coupling structure shown in FIG.
That is, connecting long holes 42 are provided at both ends of the guide groove cover 40, and screw fixing protrusions 39 configured to be slidably inserted into the respective connecting long holes 42 are provided on the back side of the lever guide 29, The guide groove cover 40 is connected to the lever guide 29 by moving in the direction along the operation guide groove 30 with respect to the lever guide 29 while slidingly guiding the guide slot cover 40 by the connecting long hole 42 and the screw fixing protrusion 39. When the position is adjusted and the operating lever 12 retracted into the retracting guide groove 31 of the lever guide 29 reaches the connecting position where it enters the retracting guide groove 41 of the guide groove cover 40, each screw fixing protrusion 39 is provided. The guide groove cover 40 is fastened and fixed to the back side of the lever guide 29 by a connecting screw 39a attached to the lever guide 29.

すなわち、運転者が代わった場合など、前記角度調節部50によって操作レバー12のレバー支軸20に対する連結角度を変更して操作レバー12のレバー支軸20からの延出向きを車体前後方向に変更し、操作レバー12の操作が行ないやすくなるように操作レバー12の握り部12の運転座席4との間隔を広く調節したり、狭く調節したりする。間隔を広く調節した場合を図8(イ)に示し、間隔を狭く調節した場合を図8(ロ)に示すように、この場合、操作レバー12を中立位置Nにしながらレバーガイド29の退避ガイド溝31に退避操作すると、操作レバー12は、連結角度の変更を行なう前に比べ、変更した角度に対応する分だけ退避ガイド溝31に対して操作ガイド溝30に沿った方向に位置ずれした状態で退避ガイド溝31に入っていくことから、ガイド溝カバー40のレバーガイド29に対する連結位置を操作レバー12の連結角度変更に対応した方向に変更調節して、操作レバー12を操作ガイド溝30から退避操作した際、操作レバー12がガイド溝カバー40の退避ガイド溝41に入り込むようにするとともに、ガイド溝カバー40の退避ガイド溝41とレバーガイド29の隙間をガイド溝カバー40によってカバーして埋めるようにしてある。   That is, when the driver changes, the connecting angle of the operation lever 12 with respect to the lever support shaft 20 is changed by the angle adjusting unit 50, and the extending direction of the operation lever 12 from the lever support shaft 20 is changed to the longitudinal direction of the vehicle body. The distance between the grip portion 12 of the operation lever 12 and the driver seat 4 is adjusted to be wide or narrow so that the operation of the operation lever 12 can be easily performed. FIG. 8 (a) shows a case where the interval is adjusted widely, and FIG. 8 (b) shows a case where the interval is adjusted narrowly, as shown in FIG. When the retraction operation is performed in the groove 31, the operation lever 12 is displaced in the direction along the operation guide groove 30 with respect to the retraction guide groove 31 by an amount corresponding to the changed angle compared to before the connection angle is changed. Therefore, the connection position of the guide groove cover 40 with respect to the lever guide 29 is changed and adjusted in a direction corresponding to the change of the connection angle of the operation lever 12, and the operation lever 12 is moved from the operation guide groove 30. When the retraction operation is performed, the operation lever 12 enters the retraction guide groove 41 of the guide groove cover 40 and the retraction guide groove 41 of the guide groove cover 40 and the lever The gap between the id 29 by the guide groove cover 40 are to fill and cover.

〔別の実施形態〕
本発明は、無段変速装置を操作対象とする操作部構造の他、操向クラッチなど各種の装置や部材を操作するための操作部構造にも適用できる。従って、無段変速装置9、操向クラッチなどを総称して操作対象物9と呼称する。
[Another embodiment]
The present invention can be applied to an operation unit structure for operating various devices and members such as a steering clutch, in addition to an operation unit structure for operating a continuously variable transmission. Accordingly, the continuously variable transmission 9, the steering clutch, etc. are collectively referred to as the operation target 9.

また、本発明は、草刈り機の他、トラクタなど各種の作業を行なう車両にも適用できる。従って、草刈り機、トラクタなどを総称して作業車と呼称する。   The present invention can also be applied to a vehicle that performs various operations such as a tractor in addition to a mower. Accordingly, mowers, tractors and the like are collectively referred to as work vehicles.

乗用型草刈り機全体の側面図Side view of the entire riding mower 乗用型草刈り機全体の平面図Top view of the entire riding mower 伝動系統図Transmission system diagram 左側の操作レバーの斜視図Perspective view of the left control lever 左側の操作レバーのレバーガイドの平面図Plan view of the lever guide for the left control lever 操作レバーの取り付け構造を示す正面図Front view showing the operating lever mounting structure 左側の操作レバーの取り付け構造を示す側面図Side view showing the mounting structure of the left control lever (イ)は、操作レバーを車体前方側に調節した状態の角度調節部の側面図、(ロ)は、操作レバーを車体後方側に調節した状態の角度調節部の側面図(A) is a side view of the angle adjustment unit with the operation lever adjusted to the front side of the vehicle body, (B) is a side view of the angle adjustment unit with the operation lever adjusted to the vehicle body rear side.

符号の説明Explanation of symbols

9 操作対象物
12 操作レバー
20 レバー支軸
20a レバー支軸芯
25a 操作レバー退避揺動の軸芯
29 レバーガイド
30 操作ガイド溝
31 レバーガイドの退避ガイド溝
40 ガイド溝カバー
41 ガイド溝カバーの退避ガイド溝
50 角度調節部
54a 操作レバーの角度調節の揺動軸芯
W1 ガイド溝カバーの退避ガイド溝の溝横幅
W2 レバーガイドの退避ガイド溝の溝横幅

9 Operation object 12 Operation lever 20 Lever support shaft 20a Lever support shaft core 25a Operation lever retracting and swinging shaft core 29 Lever guide 30 Operation guide groove 31 Lever guide retraction guide groove 40 Guide groove cover 41 Guide groove cover retraction guide Groove 50 Angle adjustment portion 54a Oscillating shaft core W1 for adjusting the angle of the operating lever Groove lateral width W2 of the guide groove cover retracting guide groove Groove lateral width of the lever guide retracting guide groove

Claims (1)

操作レバーをレバー支軸の軸芯まわりでレバーガイドの操作ガイド溝に沿わせて揺動操作して操作対象物を操作するように構成し、前記操作レバーを前記レバー支軸芯と非平行な軸芯まわりで前記レバーガイドの前記操作ガイド溝と直交する方向の退避ガイド溝に沿わせて揺動操作して前記操作ガイド溝に対して出入りさせるように構成し、前記操作レバーの前記レバー支軸に対する連結角度を前記レバー支軸芯と平行な軸芯まわりで変更するための角度調節部を設けた作業車の操作部構造であって、
前記レバーガイド側の退避ガイド溝の内部に位置するとともに前記レバーガイド側の退避ガイド溝の溝横幅より狭い溝横幅の退避ガイド溝を備えたガイド溝カバーを、前記レバーガイドに対して前記操作ガイド溝に沿う方向に移動調節自在に設けてある作業車の操作部構造。

The operation lever is configured to swing around the lever guide shaft along the operation guide groove of the lever guide to operate the operation target, and the operation lever is not parallel to the lever support shaft. The lever guide is configured to swing in and out of the operation guide groove along a retracting guide groove in a direction orthogonal to the operation guide groove of the lever guide. An operation unit structure of a work vehicle provided with an angle adjustment unit for changing a connection angle with respect to a shaft around an axis parallel to the lever support shaft;
A guide groove cover that is located inside the retraction guide groove on the lever guide side and that has a retraction guide groove having a groove width that is narrower than the groove width of the retraction guide groove on the lever guide side is provided with respect to the lever guide. An operation unit structure of a work vehicle provided to be movable and adjustable in a direction along the groove.

JP2004089911A 2004-03-25 2004-03-25 Operation unit structure of work vehicle Expired - Fee Related JP4278546B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004089911A JP4278546B2 (en) 2004-03-25 2004-03-25 Operation unit structure of work vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004089911A JP4278546B2 (en) 2004-03-25 2004-03-25 Operation unit structure of work vehicle

Publications (2)

Publication Number Publication Date
JP2005271799A true JP2005271799A (en) 2005-10-06
JP4278546B2 JP4278546B2 (en) 2009-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7455085B2 (en) 2021-03-30 2024-03-25 株式会社クボタ Self-propelled work vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7455085B2 (en) 2021-03-30 2024-03-25 株式会社クボタ Self-propelled work vehicle

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