JP2012039933A - Grass mower - Google Patents

Grass mower Download PDF

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JP2012039933A
JP2012039933A JP2010183720A JP2010183720A JP2012039933A JP 2012039933 A JP2012039933 A JP 2012039933A JP 2010183720 A JP2010183720 A JP 2010183720A JP 2010183720 A JP2010183720 A JP 2010183720A JP 2012039933 A JP2012039933 A JP 2012039933A
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cylinder
mower
shaft
working
center
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JP5763311B2 (en
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Takayuki Totani
貴之 戸谷
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Matsuyama Plow Manufacturing Co Ltd
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Matsuyama Plow Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a grass mower in which a cylinder operated when the inclination angle of a working portion to be attached to a tractor and to perform a grass mowing operation is turned and changed is miniaturized in the same turning condition.SOLUTION: In the grass mower attached to a tractor and to perform a grass mowing operation, the grass mower includes a fitting portion 110 fitted to the tractor 200, an attaching member 30 connected to the fitting portion 110, the working portion 150 turnably supported perpendicular to the attaching member 30 and performs a grass mowing operation and the cylinder 180 for turning the working portion 150. The cylinder 180 is mounted in such a way that the direction of the extension of the cylinder 180 is in a direction in which the center of gravity of the working portion 150 raised when the working portion 150 is turned.

Description

本発明は、草刈機に関し、特に、トラクタに装着して草刈り作業を行う作業部の傾斜角度を回動により変更することができる草刈機に関する。   The present invention relates to a mower, and more particularly, to a mower capable of changing an inclination angle of a working unit that is attached to a tractor and performs a mowing operation by rotation.

従来の草刈機について説明する。   A conventional mower will be described.

図７は、従来の草刈機の例を示す平面図であり、図８は、同じく側面図である。従来の草刈機１００は、装着部１１０と作業部１５０とこれらの間を連結するアーム１２０、１２５や取付部材１３０、ジョイント１４０等によって構成されている。装着部１１０を図示を省略したトラクタ２００の後部に装着して草刈作業を行う。   FIG. 7 is a plan view showing an example of a conventional mower, and FIG. 8 is a side view of the same. The conventional mower 100 includes a mounting part 110, a working part 150, arms 120 and 125, a mounting member 130, a joint 140, and the like that connect these parts. The mounting portion 110 is mounted on the rear portion of the tractor 200 (not shown) to perform the mowing work.

トラクタ２００からの動力は、装着部１１０に取り付けられる第１入力軸１１５、ジョイント１４０、作業部１５０側の第２入力軸１６１と伝達される。第２入力軸１６１は、カバー１５１上のミッションケース１６５に設置されており、第２入力軸１６１からの動力は、ミッションケース１６５内のベベルギア１６２、１６３を介して作業部１５０の側部に送られる。そして、作業部１５０の側部のベルトカバー１５２内では、伝達された動力は、第１プーリー１７０、ベルト１７１、第２プーリー１７２を介して、カバー１５１下部に配置された草刈軸１７５へ伝達される。草刈軸１７５には、草刈爪１７６が取り付けられており、草刈軸１７５を回転させると、地面上の草をカットしていく。このとき、後方のローラ１５９を接地して作業機を地面に受けることができる。   Power from the tractor 200 is transmitted to the first input shaft 115 attached to the mounting portion 110, the joint 140, and the second input shaft 161 on the working portion 150 side. The second input shaft 161 is installed in the transmission case 165 on the cover 151, and the power from the second input shaft 161 is sent to the side of the working unit 150 via the bevel gears 162 and 163 in the transmission case 165. It is done. In the belt cover 152 on the side of the working unit 150, the transmitted power is transmitted to the mowing shaft 175 disposed under the cover 151 via the first pulley 170, the belt 171, and the second pulley 172. The A mowing claw 176 is attached to the mowing shaft 175. When the mowing shaft 175 is rotated, the grass on the ground is cut. At this time, the rear roller 159 can be grounded to receive the work implement on the ground.

第１アーム１２０と第２アーム１２５は、装着部１１０に備える取付部１１１と、作業部１５０側と取り付けられる取付部材１３０の間に、それぞれ水平方向に回動可能に支持される。これら２つのアームにより平行リンクを形成している。   The first arm 120 and the second arm 125 are supported so as to be rotatable in the horizontal direction between the attachment portion 111 provided in the attachment portion 110 and the attachment member 130 attached to the working portion 150 side. These two arms form a parallel link.

図９は、従来の草刈機のオフセット移動の状態例を示す平面図である。図９に示すように、オフセットシリンダ１２８を作動させると平行リンクが動き、装着部１１０に対して、作業部１５０の位置を横方向に変化させることができる。また、動力はジョイント１４０により作業部１５０の位置が変わっても一定角度内であれば伝達可能となっている。これらにより、トラクタ２００に対しての作業部１５０の位置を変更して作業可能となる。   FIG. 9 is a plan view showing an example of the state of offset movement of a conventional mower. As shown in FIG. 9, when the offset cylinder 128 is operated, the parallel link moves, and the position of the working unit 150 can be changed in the lateral direction with respect to the mounting unit 110. Further, even if the position of the working unit 150 is changed by the joint 140, the power can be transmitted within a certain angle. Accordingly, the position of the working unit 150 with respect to the tractor 200 can be changed and work can be performed.

図１０は、従来の草刈機の例を示す背面図である。取付部材１３０の回動軸１３２が、作業部１５０のカバー１５１上にある取付部１５３（図８）に固定される支持部材１５５（図７、図９）に垂直方向に回動可能（トラクタ２００の前進方向が中心軸方向）に取り付けられる。また、回動シリンダ１８０は、取付部材１３０のシリンダ取付軸１３５に一端がとりつけられ、他端は、カバー１５１上にあるカバー側取付部１５６のカバー側取付軸１５６ａに取り付けられる。   FIG. 10 is a rear view showing an example of a conventional mower. The rotation shaft 132 of the attachment member 130 can be rotated in the vertical direction with respect to the support member 155 (FIGS. 7 and 9) fixed to the attachment portion 153 (FIG. 8) on the cover 151 of the working portion 150 (the tractor 200). Is attached in the direction of the central axis). Further, one end of the rotating cylinder 180 is attached to the cylinder attachment shaft 135 of the attachment member 130, and the other end is attached to the cover side attachment shaft 156 a of the cover side attachment portion 156 on the cover 151.

図１１は、従来の草刈機における取付部材１３０の一例を示す図である。取付部材１３０は、フレーム板１３１の一側面に、回動軸１３２を有しその反対側面は、アーム取付板１３３、１３４を有している。そして、このアーム取付板１３３、１３４の間に第１アーム１２０と、第２アーム１２５が回動可能に取り付けられる。また、回動軸１３２の上部に、シリンダ取付軸１３５が回動軸１３２と平行に設けられている。回動軸１３２は支持部材１５５に回動可能に取り付けられ、作業部１５０の回動中心となる。また、シリンダ取付軸１３５の段部１３５ａより先端に回動シリンダ１８０の一端が取り付けられる。   FIG. 11 is a diagram illustrating an example of the attachment member 130 in a conventional mower. The attachment member 130 has a rotating shaft 132 on one side surface of the frame plate 131 and arm attachment plates 133 and 134 on the opposite side surface. The first arm 120 and the second arm 125 are rotatably mounted between the arm mounting plates 133 and 134. In addition, a cylinder mounting shaft 135 is provided above the rotation shaft 132 in parallel with the rotation shaft 132. The rotation shaft 132 is rotatably attached to the support member 155 and serves as the rotation center of the working unit 150. In addition, one end of the rotating cylinder 180 is attached to the tip of the step 135a of the cylinder attachment shaft 135.

図１２は、従来の草刈機を傾斜させる場合の各状態例を示す背面図である。図１０にも示したように、回動軸１３２は、作業部１５０の重心Ｇより一方の側面側にずれており、シリンダ取付軸１３５は、回動軸１３２より上側にある。また、カバー側取付軸１５６ａは、重心Ｇより他方の側面側に位置している。このような構成で、水平位置Ａから、回動シリンダ１８０を作動させて縮ませると、作業部１５０は回動軸１３２を中心に回動し、図１２のＢの位置となる。このとき重心は持ち上がる。一方、回動シリンダ１８０を作動させて伸ばすと、作業部１５０は回動軸１３２を中心に回動し、図１２のＣの位置となる。このとき重心は下にさがる。   FIG. 12 is a rear view showing an example of each state when a conventional mower is tilted. As shown also in FIG. 10, the rotation shaft 132 is shifted to one side from the center of gravity G of the working unit 150, and the cylinder mounting shaft 135 is located above the rotation shaft 132. Further, the cover side mounting shaft 156 a is located on the other side surface side from the center of gravity G. In such a configuration, when the rotating cylinder 180 is operated and contracted from the horizontal position A, the working unit 150 rotates about the rotating shaft 132 and reaches the position B in FIG. At this time, the center of gravity is lifted. On the other hand, when the rotating cylinder 180 is actuated and extended, the working unit 150 rotates around the rotating shaft 132 and becomes the position C in FIG. At this time, the center of gravity goes down.

草刈機１００は、回動軸１３２が作業機１５０の中心より側面側（オフセット方向と逆側寄り）にずれていることにより、オフセット量を確保でき、さらに、作業機１５０をオフセットした位置（例えば、図７の位置）で作業部１５０を回動軸１３２を中心に回動させ傾斜させると、例えば、トラクタの横に位置する土手などの法面の草刈作業を容易に行うことができる。   The mower 100 can secure an offset amount because the rotation shaft 132 is shifted from the center of the work machine 150 to the side surface (on the opposite side to the offset direction), and further, a position where the work machine 150 is offset (for example, When the working unit 150 is rotated about the rotation shaft 132 and tilted at the position shown in FIG. 7, for example, a grass cutting operation such as a bank located on the side of the tractor can be easily performed.

また、特許文献１には、作業部の水平回動により、走行機の前進による側方作業と後進による後方作業ができ、作業部を上下に回動可能な草刈取り装置が記載されている。   Further, Patent Document 1 describes a grass cutting device that can perform a lateral operation by a forward movement of a traveling machine and a backward operation by a backward movement by horizontally rotating the working unit, and can rotate the working unit up and down.

特開２０１０−１１７９６号公報JP 2010-11796 A

回動シリンダ１８０の大きさは、大きければそれだけパワーがあるが、重量も大きくなり、トラクタとの重量バランスにも影響する。さらに、コスト的にも高いものとなる。このため、シリンダは、できることなら、重量的にも、コスト的にもより小型である方が好ましい。これは特許文献１の上下回動用シリンダでも同様である。   If the size of the rotating cylinder 180 is large, the power is increased, but the weight is also increased, which affects the weight balance with the tractor. Further, the cost is high. For this reason, if possible, the cylinder is preferably smaller in terms of weight and cost. The same applies to the vertical rotation cylinder of Patent Document 1.

また、従来の草刈機では、図１３に示すように、作業部１５０を回動させた場合（図１２のＣの位置に相当）、取付部材１３０の上部がジョイント１４０に干渉するため、回動角度が制限されていた。これは、リンダ支点軸１３５が上部に位置するために生じていた。   Further, in the conventional mower, as shown in FIG. 13, when the working unit 150 is rotated (corresponding to the position of C in FIG. 12), the upper portion of the attachment member 130 interferes with the joint 140. The angle was limited. This occurs because the Linda fulcrum shaft 135 is located at the top.

本発明は、上記課題に鑑みて、トラクタに装着して草刈り作業を行う作業部の傾斜角度を回動させて変更させる際に作動させるシリンダを同じ回動条件に対してより小型にすることができる草刈機を提供することを目的とする。   In view of the above-described problems, the present invention can reduce the size of a cylinder that is actuated when rotating and changing the inclination angle of a working unit that is attached to a tractor and performs mowing work with respect to the same rotation condition. The purpose is to provide a mower that can be used.

上記目的を達成するため、本発明の草刈機は、トラクタに装着して草刈作業を行う草刈機において、トラクタに装着する装着部と、前記装着部と連結される取付部材と、前記取付部材に垂直方向に回動可能に支持されて草刈作業を行う作業部と、前記作業部を回動させるシリンダとを有し、前記シリンダは、前記作業部を回動させるとき前記作業部の重心が持ち上がる方向が当該シリンダの伸びる方向になるように取り付けられることを特徴とする。   In order to achieve the above object, a mower according to the present invention is a mower that is attached to a tractor and performs mowing work, an attachment portion attached to the tractor, an attachment member connected to the attachment portion, and A working unit that is supported so as to be pivotable in a vertical direction and performs a mowing operation, and a cylinder that rotates the working unit, and the cylinder raises the center of gravity of the working unit when the working unit is rotated. It is attached so that a direction may become the direction where the said cylinder extends.

さらに本発明の草刈機は、前記取付部材は前記作業部に、当該作業部の回動中心が当該作業部の重心より一方の側面側にずれた位置になるように取り付けられ、前記シリンダは、前記回動中心より下側に位置する前記取付部材上と、前記作業部の重心より他方の側面側に位置する前記作業部上との間に取り付けられることを特徴とする。
さらに本発明の草刈機は、前記装着部と前記取付部材の間の連結は、２本のアームによる平行リンクを介してオフセット可能に連結されていることを特徴とする。 Furthermore, in the mower according to the present invention, the attachment member is attached to the working portion so that the rotation center of the working portion is shifted to one side from the center of gravity of the working portion. It is attached between the attachment member located below the rotation center and the work part located on the other side face from the center of gravity of the work part.
Furthermore, the mower of the present invention is characterized in that the connection between the mounting portion and the mounting member is connected via a parallel link by two arms so as to be offset.

本発明によれば、草刈機において、トラクタに装着して草刈り作業を行う作業部の傾斜角度を回動させて変更させる際に作動させるシリンダを同じ回動条件に対してより小型にすることができる。   According to the present invention, in the mower, the cylinder that is actuated when the inclination angle of the working portion that is attached to the tractor and performs the mowing work is rotated and changed can be made smaller with respect to the same rotation condition. it can.

本発明の草刈機の一実施形態を示す背面図である。It is a rear view which shows one Embodiment of the mower of this invention. 本発明の草刈機の一実施形態を示す平面図である。It is a top view which shows one Embodiment of the mower of this invention. 本発明の草刈機における取付部材の一例を示す図である。（ａ）〜（ｃ）は視点の角度を変えて示した図である。It is a figure which shows an example of the attachment member in the mower of this invention. (A)-(c) is the figure shown changing the angle of a viewpoint. シリンダについての説明図である。It is explanatory drawing about a cylinder. 本発明の草刈機を傾斜させる場合の各状態例を示す背面図である。It is a rear view which shows each state example in the case of tilting the mower of this invention. 本発明の草刈機の傾斜した状態の一例を示す正面図である。It is a front view which shows an example of the state which the mower of this invention inclined. 従来の草刈機の例を示す平面図である。It is a top view which shows the example of the conventional mower. 従来の草刈機の例を示す側面図である。It is a side view which shows the example of the conventional mower. 従来の草刈機のオフセット移動の状態例を示す平面図である。It is a top view which shows the example of a state of the offset movement of the conventional mower. 従来の草刈機の例を示す背面図である。It is a rear view which shows the example of the conventional mower. 従来の草刈機における取付部材の一例を示す図である。（ａ）〜（ｃ）は視点の角度を変えて示した図である。It is a figure which shows an example of the attachment member in the conventional mower. (A)-(c) is the figure shown changing the angle of a viewpoint. 従来の草刈機を傾斜させる場合の各状態例を示す背面図である。It is a rear view which shows each state example in the case of inclining the conventional mower. 従来の草刈機の傾斜した状態の一例を示す正面図である。It is a front view which shows an example of the state which the conventional mowing machine inclined.

本発明を実施するための形態を説明する。以下の実施形態では、図７〜図１３で示した従来例と異なる点について説明し、同一の箇所には同一の符号を付してある。   A mode for carrying out the present invention will be described. In the following embodiments, differences from the conventional example shown in FIGS. 7 to 13 will be described, and the same portions are denoted by the same reference numerals.

図１は、本発明の草刈機の一実施形態を示す背面図であり、取付部材３０の位置関係を示してある。また、図２は、同じく平面図である。また、図３は、本発明の草刈機１における取付部材３０の一例を示す図である。従来例と異なる点は、取付部材３０の形状と、回動シリンダ１８０の取り付けである。   FIG. 1 is a rear view showing an embodiment of the mower of the present invention, and shows the positional relationship of the attachment member 30. FIG. 2 is also a plan view. Moreover, FIG. 3 is a figure which shows an example of the attachment member 30 in the mower 1 of this invention. The difference from the conventional example is the shape of the mounting member 30 and the mounting of the rotating cylinder 180.

図３に示すように、取付部材３０は、フレーム板３１の一側面に、回動軸３２とシリンダ取付軸３５を有しその反対側面には、第１上孔３３ａと第２上孔３３ｂを有するアーム取付上板３３と、第１下孔３４ａと第２下孔３４ｂを有するアーム取付下板３４を有している。そして、このアーム取付上板３３とアーム取付下板３４の間に、第１上孔３３ａと第１下孔３４ａ間を軸として第１アーム１２０が、第２上孔３３ｂと第２下孔３４ｂを軸として第２アーム１２５が水平方向に回動可能に取り付けられる。   As shown in FIG. 3, the attachment member 30 has a rotation shaft 32 and a cylinder attachment shaft 35 on one side surface of the frame plate 31, and a first upper hole 33 a and a second upper hole 33 b on the opposite side surface. The arm mounting upper plate 33 has an arm mounting lower plate 34 having a first lower hole 34a and a second lower hole 34b. And between this arm attachment upper board 33 and the arm attachment lower board 34, the 1st arm 120 centering on between the 1st upper hole 33a and the 1st lower hole 34a, the 2nd upper hole 33b, and the 2nd lower hole 34b The second arm 125 is attached so as to be rotatable in the horizontal direction about the axis.

回動軸３２は、補強部３６を介してフレーム板３１に固定されている。また、シリンダ取付軸３５は、回動軸３２の下側に設けられており、回動軸１３２と平行に設けられている。また、シリンダ取付軸３５の位置は、回動させたときの回動シリンダ１８０との干渉を考慮して、回動軸３２より重心Ｇの方向へ横側にずれており、シリンダ取付軸３５の上部には補強部材３６を配していない。また、シリンダ取付軸３５の段部３５ａは、従来例（段部１３５ａ）より、フレーム板３１に近くなっている。   The rotating shaft 32 is fixed to the frame plate 31 via a reinforcing portion 36. The cylinder attachment shaft 35 is provided below the rotation shaft 32 and is provided in parallel with the rotation shaft 132. Further, the position of the cylinder mounting shaft 35 is shifted laterally from the rotating shaft 32 toward the center of gravity G in consideration of interference with the rotating cylinder 180 when rotated. The reinforcing member 36 is not arranged on the upper part. Further, the step portion 35a of the cylinder mounting shaft 35 is closer to the frame plate 31 than the conventional example (step portion 135a).

この取付部材３０を、草刈機に適用すると図１のようになる。また、図２に示すように、回動軸３２は、作業部１５０の重心Ｇより少なくとも一方の側面側にずれて支持部材１５５に回動可能に取り付けられる。また、シリンダ取付軸３５は、回動軸３２より下側に位置しており、かつ、横方向については、やや重心Ｇ側（カバー側取付軸５６ａ側）にずれている。一方、カバー側取付部５６に有するカバー側取付軸５６ａは、作業部１５０の重心Ｇより他方の側面側の方向に設置される。カバー側取付部５６はカバー１５１上に有しており、カバー側取付軸５６ａはシリンダ取付軸３５よりやや高い位置となっている。そして、回動シリンダ１８０の両端は、シリンダ取付軸３５とカバー側取付軸５６ａとの間を連結して、それぞれ（作業部１５０の回動と同じ方向に）回動可能に取り付けられている。   When this attachment member 30 is applied to a mower, the result is as shown in FIG. In addition, as shown in FIG. 2, the rotation shaft 32 is attached to the support member 155 so as to be shifted from the center of gravity G of the working unit 150 toward at least one side surface. Further, the cylinder mounting shaft 35 is located below the rotation shaft 32 and is slightly shifted to the center of gravity G side (the cover side mounting shaft 56a side) in the lateral direction. On the other hand, the cover side mounting shaft 56 a included in the cover side mounting portion 56 is installed in the direction of the other side surface from the center of gravity G of the working unit 150. The cover side mounting portion 56 is provided on the cover 151, and the cover side mounting shaft 56 a is positioned slightly higher than the cylinder mounting shaft 35. Then, both ends of the rotation cylinder 180 are rotatably connected to each other (in the same direction as the rotation of the working unit 150) by connecting the cylinder attachment shaft 35 and the cover side attachment shaft 56a.

また、シリンダ取付軸３５を回動軸３２より下側にしたことにより、回動シリンダ１８０が、カバー１５１との干渉が生じるようになる。このため、図２で示すように、上側からみて回動シリンダ１８０をカバー１５１より外側（前側）に配置させる。すなわち、カバー側取付部５６のカバー側取付軸５６ａをカバー１５１より前に突出させ、さらに、取付部材３０のシリンダ取付軸３５の段部３５ａの位置をフレーム板３１側にし、回動シリンダ１８０をカバー１５１に当たらないようにしている。   Further, since the cylinder mounting shaft 35 is located below the rotation shaft 32, the rotation cylinder 180 interferes with the cover 151. Therefore, as shown in FIG. 2, the rotating cylinder 180 is disposed on the outer side (front side) than the cover 151 as viewed from above. That is, the cover-side mounting shaft 56a of the cover-side mounting portion 56 is projected forward from the cover 151, and the position of the step portion 35a of the cylinder mounting shaft 35 of the mounting member 30 is set to the frame plate 31 side. The cover 151 is not hit.

図４は、シリンダについての説明図である。シリンダ２１０は、片方にロッド２１１を有し、シリンダ内のピストン２１２と接続している。このとき、同じ圧力をシリンダ内にかけた場合、力は「圧力×面積」であるためロッド２１１を有しないＢ方向の力の方が圧力を受ける面積がＡ方向より大きく、発生する力も大きくなる。すなわち、この方式のシリンダの場合、同じ圧力に対して、伸びの力のほうが大きく出せることになる。回動シリンダ１８０においても同様のシリンダを採用し、油圧などにより圧力をかける。   FIG. 4 is an explanatory diagram of the cylinder. The cylinder 210 has a rod 211 on one side and is connected to a piston 212 in the cylinder. At this time, when the same pressure is applied to the cylinder, the force is “pressure × area”, so the force in the B direction without the rod 211 is larger in the area receiving the pressure than the A direction, and the generated force is also increased. That is, in the case of this type of cylinder, the extension force can be increased with respect to the same pressure. A similar cylinder is also used for the rotating cylinder 180, and pressure is applied by hydraulic pressure or the like.

図５は、本発明の草刈機を傾斜させた場合の各状態例を示す背面図である。図５に示すように、水平位置Ａから、回動シリンダ１８０を作動させて伸ばすと、作業部１５０は回動軸３２を中心に取付部材３０に対して回動して図５のＢの位置となる。このとき重心Ｇは持ち上がる。また、図５のＢの位置から、回動シリンダ１８０を作動させて縮ませると、作業部１５０は回動軸３２を中心に回動して図５のＡの位置にもどる。このとき重心Ｇは下にさがる。一方、水平位置Ａから、回動シリンダ１８０を作動させて縮ませると、作業部１５０は取付部材３０に対して回動軸３２を中心に回動して図５のＣの位置となる。このとき重心Ｇは下にさがる。また、図５のＣの位置から、回動シリンダ１８０を作動させて伸ばすと、作業部１５０は回動軸３２を中心に回動して図５のＡの位置にもどる。このとき重心Ｇは持ち上がる。   FIG. 5 is a rear view showing an example of each state when the mower of the present invention is tilted. As shown in FIG. 5, when the rotation cylinder 180 is operated and extended from the horizontal position A, the working unit 150 rotates about the rotation shaft 32 with respect to the attachment member 30 and moves to the position B in FIG. 5. It becomes. At this time, the center of gravity G is lifted. When the rotating cylinder 180 is operated and contracted from the position B in FIG. 5, the working unit 150 rotates about the rotating shaft 32 and returns to the position A in FIG. 5. At this time, the center of gravity G is lowered. On the other hand, when the rotating cylinder 180 is operated and contracted from the horizontal position A, the working unit 150 rotates about the rotating shaft 32 with respect to the attachment member 30 to the position C in FIG. At this time, the center of gravity G is lowered. When the rotating cylinder 180 is operated and extended from the position C in FIG. 5, the working unit 150 rotates around the rotating shaft 32 and returns to the position A in FIG. 5. At this time, the center of gravity G is lifted.

このように、重心Ｇが持ち上がる時に、回動シリンダ１８０を伸ばす方向に設置することで、シリンダの力を大きくでき、同じ条件ならより小型のシリンダ（例えば、径の細いシリンダ）とすることができる。また、同じシリンダであれば、大きな作業部１５０を動かすことができる。さらに、シリンダ径を同じにした場合、大きな力を出せるので、シリンダの取り付けを変更して（例えば、回動軸３２とシリンダ取付軸３５の距離を縮めるなどしてて）、シリンダのストロークを短いものとすることもできる。   As described above, when the center of gravity G is lifted, the rotating cylinder 180 is installed in the direction in which it is extended, whereby the force of the cylinder can be increased, and a smaller cylinder (for example, a cylinder having a smaller diameter) can be obtained under the same conditions. . Moreover, if it is the same cylinder, the big working part 150 can be moved. Furthermore, when the cylinder diameter is the same, a large force can be generated, so the cylinder mounting is changed (for example, the distance between the rotating shaft 32 and the cylinder mounting shaft 35 is shortened), and the cylinder stroke is shortened. It can also be.

また、図６のように、作業部１５０を回動させた場合（図５のＣの位置に相当）、従来例（図１３）と異なり、取付部材３０のシリンダ取付軸３５が上部にないため、ジョイント１４０との干渉域がなくなる。これにより、作業部１５０の回動範囲をより広くとることが可能となる。   In addition, when the working unit 150 is rotated as shown in FIG. 6 (corresponding to the position C in FIG. 5), unlike the conventional example (FIG. 13), the cylinder mounting shaft 35 of the mounting member 30 is not at the top. The interference area with the joint 140 is eliminated. As a result, the rotation range of the working unit 150 can be made wider.

１００ 草刈機
３０、１３０ 取付部材
３２、１３２ 回動軸
３５、１３５ シリンダ取付軸
５６、１５６ カバー側取付部
５６ａ、１５６ａ カバー側取付軸
１１０ 装着部
１２０ 第１アーム
１２５ 第２アーム
１４０ ジョイント
１５０ 作業部
１５１ カバー
１５５ 支持部材
１８０ 回動シリンダ
２００ トラクタ
Ｇ 作業部１５０の重心Ｇ 100 Mower 30, 130 Mounting member 32, 132 Rotating shaft 35, 135 Cylinder mounting shaft 56, 156 Cover side mounting portion 56a, 156a Cover side mounting shaft 110 Mounting portion 120 First arm 125 Second arm 140 Joint 150 Working portion 151 Cover 155 Supporting member 180 Rotating cylinder 200 Tractor G Center of gravity G of working unit 150

Claims (3)

トラクタに装着して草刈作業を行う草刈機において、
トラクタに装着する装着部と、前記装着部と連結される取付部材と、前記取付部材に垂直方向に回動可能に支持されて草刈作業を行う作業部と、前記作業部を回動させるシリンダとを有し、
前記シリンダは、前記作業部を回動させるとき前記作業部の重心が持ち上がる方向が当該シリンダの伸びる方向になるように取り付けられることを特徴とする草刈機。 In a mower that is attached to a tractor and performs mowing work,
A mounting portion to be mounted on the tractor; an attachment member connected to the mounting portion; a working portion that is supported by the mounting member so as to be rotatable in a vertical direction; and a cylinder that rotates the working portion; Have
The mower is attached so that the direction in which the center of gravity of the working unit is lifted is the direction in which the cylinder extends when the working unit is rotated. 請求項１に記載の草刈機において、
前記取付部材は前記作業部に、当該作業部の回動中心が当該作業部の重心より一方の側面側にずれた位置になるように取り付けられ、
前記シリンダは、前記回動中心より下側に位置する前記取付部材上と、前記作業部の重心より他方の側面側に位置する前記作業部上との間に取り付けられることを特徴とする草刈機。 The mower according to claim 1,
The attachment member is attached to the working part so that the rotation center of the working part is shifted to one side from the center of gravity of the working part,
The mower is mounted between the mounting member positioned below the rotation center and the working portion positioned on the other side of the center of gravity of the working portion. . 請求項１又は請求項２記載の草刈機において、
前記装着部と前記取付部材の間の連結は、２本のアームによる平行リンクを介してオフセット可能に連結されていることを特徴とする草刈機。 In the mower according to claim 1 or 2,
The mowing machine is characterized in that the attachment portion and the attachment member are connected to each other so as to be offset via a parallel link formed by two arms.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018102225A (en) * 2016-12-27 2018-07-05 小橋工業株式会社 Mower
JP2019013161A (en) * 2017-07-04 2019-01-31 松山株式会社 Agricultural work machine

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JPH0358924U (en) * 1989-10-16 1991-06-10
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JPH1084736A (en) * 1996-09-10 1998-04-07 Kubota Corp Hydraulic circuit of reel mower
JPH10201323A (en) * 1997-01-21 1998-08-04 Kubota Corp Mowing device
JP2008035816A (en) * 2006-08-09 2008-02-21 Kyoeisha Co Ltd Multi-rotary mower
JP2010011796A (en) * 2008-07-04 2010-01-21 Sasaki Corporation Mower such as flail mower

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JPH0260513A (en) * 1988-08-24 1990-03-01 Kubota Ltd Lawn mower
JPH03108406A (en) * 1989-09-22 1991-05-08 Kubota Corp Mower-operating device in lawn mower
JPH0358924U (en) * 1989-10-16 1991-06-10
JPH04237723A (en) * 1991-01-16 1992-08-26 Kubota Corp Mower fitting device of car
JPH0614622A (en) * 1992-07-03 1994-01-25 Kubota Corp Working machine for paddy field
JPH1084736A (en) * 1996-09-10 1998-04-07 Kubota Corp Hydraulic circuit of reel mower
JPH10201323A (en) * 1997-01-21 1998-08-04 Kubota Corp Mowing device
JP2008035816A (en) * 2006-08-09 2008-02-21 Kyoeisha Co Ltd Multi-rotary mower
JP2010011796A (en) * 2008-07-04 2010-01-21 Sasaki Corporation Mower such as flail mower

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018102225A (en) * 2016-12-27 2018-07-05 小橋工業株式会社 Mower
JP2019013161A (en) * 2017-07-04 2019-01-31 松山株式会社 Agricultural work machine

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