JP5811524B2 - Lawn mower for tractor - Google Patents

Lawn mower for tractor Download PDF

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JP5811524B2
JP5811524B2 JP2010219127A JP2010219127A JP5811524B2 JP 5811524 B2 JP5811524 B2 JP 5811524B2 JP 2010219127 A JP2010219127 A JP 2010219127A JP 2010219127 A JP2010219127 A JP 2010219127A JP 5811524 B2 JP5811524 B2 JP 5811524B2
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lawn mower
link
lifting
tractor
mower
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JP2012070696A (en
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大尊 戸田
大尊 戸田
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Iseki and Co Ltd
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この発明は、トラクタ等の腹部に装着する芝刈機に関し、特にその昇降連動装置に関する。   The present invention relates to a lawn mower mounted on an abdomen such as a tractor, and more particularly to an elevation interlocking device.

従来、トラクタ等の腹部に芝刈機を平行リンクによって上下に昇降自在に連結し、この平行リンクを連動する連動アームを、トラクタ後部に既存する3点式昇降リンクのうち、ロアリンクの上下動に連動連結する構成が公知である。   Conventionally, a lawn mower is connected to the abdomen of a tractor or the like by a parallel link so that it can be moved up and down, and an interlocking arm that interlocks the parallel link is used to move the lower link up and down among the existing three-point lift links at the rear of the tractor. A structure for interlocking connection is known.

特許第2777021号公報(図4)Japanese Patent No. 2777021 (FIG. 4)

ところで、前記のようにトラクタに既存のロアリンクを兼用することにより、該ロアリンクを昇降連動する油圧シリンダ機構の兼用化も相俟って容易に昇降連動機構を構成できる利点がある。   By the way, when the existing lower link is also used as the tractor as described above, there is an advantage that the lifting / lowering interlocking mechanism can be easily configured with the combined use of the hydraulic cylinder mechanism that interlocks the lower link.

しかしながら、一旦芝刈機昇降のためにロアリンクを連動連結すると、油圧シリンダ機構及びロアリンク等、元々トラクタに備えられた後部作業機昇降装置としての機能が損なわれ、後部作業機を装着する場合には、いちいち芝刈機とロアリンクとの間の連動機構を取り外さねばならず煩わしい。   However, once the lower link is interlocked to raise and lower the lawn mower, the functions of the rear work machine lifting device originally provided in the tractor, such as the hydraulic cylinder mechanism and the lower link, are impaired, and the rear work machine is mounted. Is troublesome because the interlocking mechanism between the lawn mower and the lower link must be removed one by one.

この発明は、上記に鑑み、後部作業機装着時における後部作業機昇降装置としての機能に簡単容易に切り替え得る昇降連動装置を提供しようとする。   In view of the above, an object of the present invention is to provide a lift interlocking device that can be easily and easily switched to a function as a rear work implement lifting device when the rear work implement is mounted.

この発明は前記課題に鑑み、次のような技術的手段を講じた。
即ち、請求項1の発明では、昇降操作レバー(53)の操作によりトラクタ(1)の車体後部の後作業機を昇降自在に連結する後作業機昇降リンク機構(46)を備え、該トラクタ(1)の腹部に前リンク(43)と後リンク(45)によって芝刈機(5)を昇降自在に装着し、該芝刈機(5)と前記後作業機昇降リンク機構(46)との間に芝刈機昇降リンク機構(48)を備え、前記後作業機昇降リンク機構(46)を昇降操作レバー(53)により昇降連動することによって前記芝刈機昇降リンク機構(48)を介して芝刈機(5)を作業状態に降下し又は非作業姿勢に上昇する構成とし、前記芝刈機昇降リンク機構(48)に芝刈機上昇保持機構(60)を組み込み、該芝刈機上昇保持機構(60)によって芝刈機(5)を上昇保持した状態で昇降操作レバー(53)を操作することにより、前記後作業機昇降リンク機構(46)を芝刈機の昇降動作とは関係なく独立的に昇降可能とする融通機構(64)を設け、
前記芝刈機昇降リンク機構(48)は、中間リンク(55)と、該中間リンク(55)と芝刈機(5)とを連結する吊下げロッド(56)と、該中間リンク(55)と後作業機昇降リンク機構(46)とを連結する牽引ロッド(59)を備え、該中間リンク(55)とトラクタ(1)車体との間に芝刈機上昇保持機構(60)としてのストッパ部材(61)を、該ストッパ部材(61)の接当部(61a)がトラクタ(1)側に接当して中間リンク(55)のボス部(55a)回りの回動を規制する起立姿勢(Q)とこの回動を許容する収納姿勢(P)とに切り替えるように構成し、この起立姿勢(Q)で一体の中間リンク(55)の回動を規制して芝刈機(5)を上昇保持する構成とし、
前記融通機構(64)は、前記牽引ロッド(59)と中間リンク(55)とを、ピン部材(55d)と長孔(59a)の係止によって構成し、前記芝刈機上昇保持機構(60)にて芝刈機(5)を上昇位置に保持する状態のとき、前記中間リンク(55)に対し前記長孔(59a)の範囲で前記牽引ロッド(59)は融通状態となり、前記後作業機昇降リンク機構(46)を単独で上昇可能に構成したことを特徴とするトラクタ用芝刈機とする。
In view of the above problems, the present invention has taken the following technical means.
In other words, the invention of claim 1 includes a rear work machine lifting link mechanism (46) for connecting the rear work machine at the rear of the vehicle body of the tractor (1) so as to be movable up and down by operation of the lifting operation lever (53). 1) A lawn mower (5) is attached to the abdomen of the abdomen by a front link (43) and a rear link (45) so as to be movable up and down, and between the lawn mower (5) and the rear work machine elevating link mechanism (46). lawn mower lifting linkage (48) Bei example, said post-working machine lifting linkage (46) through said mower lifting linkage (48) by lifting interlocked by the lift control lever (53) the mower ( The lawn mower lift holding mechanism (60) is incorporated in the lawn mower lifting link mechanism (48), and the lawn mower lift holding mechanism (60) is used to cut the lawn mower. Hold the machine (5) up By operating the lifting operation lever in the state (53) has, set the flexibility mechanism to independently vertically movable irrespective (64) of the vertical movement of the rear working machine lifting linkage (46) the mower ,
The lawn mower lifting link mechanism (48) includes an intermediate link (55), a suspension rod (56) for connecting the intermediate link (55) and the lawn mower (5), the intermediate link (55) and the rear link. A pulling rod (59) for connecting the work implement lifting link mechanism (46) is provided, and a stopper member (61) as a lawnmower ascending and holding mechanism (60) is provided between the intermediate link (55) and the tractor (1) vehicle body. ) In a standing posture (Q) in which the contact portion (61a) of the stopper member (61) contacts the tractor (1) side and restricts the rotation of the intermediate link (55) around the boss portion (55a). And the stowing mower (5) is held up by restricting the rotation of the integral intermediate link (55) in this standing posture (Q). With configuration,
The accommodation mechanism (64) includes the traction rod (59) and the intermediate link (55) configured by locking a pin member (55d) and a long hole (59a), and the lawnmower ascending and holding mechanism (60). When the lawn mower (5) is held in the raised position, the traction rod (59) is in a flexible state in the range of the long hole (59a) with respect to the intermediate link (55), and the rear work machine is lifted and lowered. A lawn mower for a tractor characterized in that the link mechanism (46) can be lifted independently .

上記のように構成すると、後作業機昇降リンク機構(46)を昇降連動することによって、芝刈機昇降リンク機構(48)を介して芝刈機(5)を作業状態に降下し、又は非作業状態に上昇する。芝刈機昇降リンク機構(48)には、芝刈機上昇保持機構(60)を組み込んで、芝刈機(5)の上昇姿勢で保持することができる。そして、この上昇保持の状態で昇降操作レバー(53)を操作することにより、融通機構(64)によって後作業機昇降リンク機構(46)を芝刈機の昇降動作とは関係なく独立して昇降でき、装着される後作業機を芝刈機(5)が装着された状態のままで昇降連動できる。
芝刈機昇降リンク機構(48)側又はトラクタ(1)車体側のいずれかにストッパ部材(61)を備えて、いずれか他方に接当部(61a)が作用する起立姿勢(Q)に切り替えると、後作業機昇降リンク機構(46)を降下側に作用させようとしても芝刈機(5)は下降せず上昇姿勢に保持する。
中間リンク機構(55)のボス部(55b)回りの回動を規制する前記保持状態のとき、後作業機昇降リンク機構(46)側から牽引ロッド(59)に伝達される芝刈機上昇作用力は、長孔(59a)の範囲においてピン部材(55d)の移動を許容して中間リンク(55)に伝達されない。
ストッパ部材(61)の接当部(61a)は、起立姿勢Qでトラクタ(1)のリヤ伝動ケース(4)腹部に接当することによって一体の中間リンク(55)の回動が規制されて芝刈機(5)を上昇保持する。
融通機構(64)は、前記牽引ロッド(59)と中間リンク(55)とを、ピン部材(55d)と長孔(59a)の係止によって構成している。前記芝刈機上昇保持機構(60)にて芝刈機(5)を上昇位置に保持する状態のとき、前記中間リンク(55)に対し前記長孔(59a)の範囲で前記牽引ロッド(59)は融通状態となり、前記後作業機昇降リンク機構(46)を単独で上昇する。
If comprised as mentioned above, a lawn mower (5) will be lowered | hung to a working state via a lawn mower raising / lowering link mechanism (48) by interlocking raising / lowering a back work machine raising / lowering link mechanism (46), or a non-working state To rise. The lawn mower elevating link mechanism (48) is incorporated with a lawn mower lift holding mechanism (60), and can be held in the raised position of the lawn mower (5). Then, by operating the lifting operation lever (53) in this lifted state, the rear working machine lifting link mechanism (46) can be lifted and lowered independently of the lifting action of the lawn mower by the interchange mechanism (64). Then, the attached work machine can be linked up and down with the lawn mower (5) attached.
When the lawn mower elevating link mechanism (48) side or the tractor (1) vehicle body side is provided with a stopper member (61), and the switch is made to the standing posture (Q) in which the contact portion (61a) acts on either one of them. Even if the rear work machine lifting link mechanism (46) is to be acted on the lowering side, the lawn mower (5) is not lowered and is held in the rising posture.
Lawn mower lifting action force transmitted from the rear work machine lifting link mechanism (46) side to the traction rod (59) when the holding state restricts the rotation of the intermediate link mechanism (55) around the boss part (55b). Is not transmitted to the intermediate link (55) while allowing the pin member (55d) to move within the range of the long hole (59a).
The contact portion (61a) of the stopper member (61) contacts the rear transmission case (4) abdomen of the tractor (1) in the standing posture Q, thereby restricting the rotation of the integral intermediate link (55). Hold the lawn mower (5) up.
In the accommodation mechanism (64), the pulling rod (59) and the intermediate link (55) are configured by locking the pin member (55d) and the long hole (59a). When the lawn mower lift holding mechanism (60) holds the lawn mower (5) in the raised position, the tow rod (59) is within the range of the long hole (59a) with respect to the intermediate link (55). It becomes an accommodation state and raises the said back work machine raising / lowering link mechanism (46) independently.

請求項2の発明では、芝刈機上昇保持機構(60)としての前記ストッパ部材(61)は、ばね(65)の作用によって起立姿勢(Q)を維持し、遠隔操作によって該ばね(65)に抗して収納姿勢(P)に切り替える連携手段(66)を備えた請求項1に記載のトラクタ用芝刈機とする。 In the invention of claim 2, the stopper member (61) as the lawn mower ascending / holding mechanism (60) maintains the standing posture (Q) by the action of the spring (65), and is remotely attached to the spring (65). The lawn mower for a tractor according to claim 1, further comprising cooperation means (66) for switching to the storage posture (P) .

このように構成すると、ワイヤ等の連携手段(66)により手元において遠隔操作でストッパ部材(61)を操作できる。 If comprised in this way, a stopper member (61) can be operated by remote control at hand by cooperation means (66) , such as a wire.

本発明は、前記の如く構成したので、以下の効果を奏する。
即ち、請求項1に記載の発明によると、芝刈機(5)を上昇保持の状態で融通機構(64)によって後作業機昇降リンク機構(46)を芝刈機の昇降動作とは関係なく独立して昇降でき、装着される後作業機を芝刈機(5)が装着された状態のままで昇降連動でき、いちいち芝刈機(5)を取り外す必要がない。
中間リンク(55)とトラクタ(1)車体との間に配置するストッパ部材(61)の姿勢切替という簡単な構成で芝刈機上昇保持手段(60)を実施できる。ピン部材(55d)と長孔(59a)との係止という簡単な構成で融通機構(64)を構成できる。
芝刈機上昇保持機構(60)にて芝刈機(5)を上昇位置に保持する状態のとき、中間リンク(55)はストッパ部材(61)の作用によって回動が規制される。
そして、長孔(59a)の範囲で前記牽引ロッド(59)は融通状態となり、後作業機昇降リンク機構(46)は単独で上昇する。
Since the present invention is configured as described above, the following effects can be obtained.
In other words, according to the first aspect of the present invention, the rear work machine lifting link mechanism (46) is made independent of the lifting action of the lawn mower by the interchange mechanism (64) while the lawn mower (5) is held upward. It is possible to move up and down, and the attached work machine can be moved up and down while the lawn mower (5) is attached, and there is no need to remove the lawn mower (5).
The lawn mower ascending and holding means (60) can be implemented with a simple configuration of switching the posture of the stopper member (61) disposed between the intermediate link (55) and the tractor (1) vehicle body. The accommodation mechanism (64) can be configured with a simple configuration of locking the pin member (55d) and the long hole (59a).
When the lawn mower lift holding mechanism (60) holds the lawn mower (5) in the raised position, the rotation of the intermediate link (55) is restricted by the action of the stopper member (61).
And the said pulling rod (59) will be in an interchangeable state in the range of a long hole (59a), and a back work machine raising / lowering link mechanism (46) will raise independently.

請求項2に記載の発明によると、請求項1に記載の効果に加え、ワイヤ等の連携手段(66)により手元において遠隔操作でストッパ部材(61)を操作できるため、切替操作の工数や時間を軽減できる。 According to the second aspect of the invention, in addition to the effect of the first aspect , the stopper member (61) can be operated by remote operation at hand by the link means (66) such as a wire. Can be reduced.

トラクタ用芝刈機の全体側面図Overall side view of tractor lawn mower 芝刈機の全体平面図Overall plan view of lawn mower 芝刈機の一部切断した全体背面図Full rear view of a partially cut lawn mower 伝動ケースの拡大平面図(A)、一部展開した側断面図(B)Enlarged plan view of the transmission case (A), partially expanded side sectional view (B) 要部の側面図Side view of the main part 芝刈機昇降リンク機構の平面図(A)、側面図(B)Top view (A), side view (B) of lawn mower lifting link mechanism 他の実施例を示す要部の斜視図The perspective view of the principal part which shows another Example 更に他の実施例を示す概要図Schematic diagram showing still another embodiment 前リンクの平面図(A)、側面図(B)Plan view of front link (A), side view (B)

以下、本発明の一実施例を図面に基づいて説明する。
トラクタ1は、車体フレーム2と、この車体フレーム2の後部に設けたフロント伝動ケ−ス3と、リヤ伝動ケース4の下側に上下移動自在の芝刈機5、この芝刈機5への伝動装置6を設けている。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The tractor 1 includes a body frame 2, a front transmission case 3 provided at the rear of the body frame 2, a lawn mower 5 that can be moved up and down below the rear transmission case 4, and a transmission device to the lawn mower 5. 6 is provided.

前記トラクタ1の車体フレーム2の下側には、土壌面を走行する前部に左右一対の前輪7と、後部に左右一対の後輪8とを回転自在に軸支してなる走行装置9を設け、該各後輪8の上側には、後輪カバー8aを配設した構成である。前記車体フレーム2の上側に載置したエンジン10の上部には、ボンネット11を設け、このボンネット11の後部には、走行操作する操作ハンドル12と、この操作ハンドル12の前側には、各種項目を表示する操作パネル13とを配設した構成である。   Below the vehicle body frame 2 of the tractor 1 is a traveling device 9 that rotatably supports a pair of left and right front wheels 7 on the front and a pair of left and right rear wheels 8 on the rear. The rear wheel cover 8a is provided on the upper side of each rear wheel 8. A bonnet 11 is provided on the upper part of the engine 10 placed on the upper side of the vehicle body frame 2, and an operation handle 12 for running operation is provided at the rear of the bonnet 11, and various items are provided on the front side of the operation handle 12. The operation panel 13 to be displayed is arranged.

前記操作ハンドル12の後側には、作業者が搭乗して走行操作等を行う操縦席14を設けると共に、この操縦席14の横側には、トラクタ1を操作制御する各種の操作レバー等よりなる操作装置15を設けた構成である。前記操縦席14の下側には、エンジン10の動力が入力される伝動機構16を内装したフロント伝動ケース3を設け、このフロント伝動ケース3の後側には、伝動機構17を内装したリヤ伝動ケース4等を配設した構成である。   On the rear side of the operation handle 12, a pilot seat 14 on which an operator gets on and performs a traveling operation and the like is provided, and on the lateral side of the pilot seat 14, various operation levers for operating and controlling the tractor 1 are provided. The operation device 15 is provided. A front transmission case 3 having a transmission mechanism 16 into which power of the engine 10 is input is provided below the cockpit 14, and a rear transmission having a transmission mechanism 17 is provided behind the front transmission case 3. The case 4 is arranged.

このフロント伝動ケース3の下部には、PTO伝動機構18aを内装したPTO伝動ケース18を装着して設け、このPTO伝動ケース18には、前方へ突出させたPTO軸19を内装して設け、このPTO軸19には、該エンジン10の動力を該フロント伝動ケース3及び該PTO伝動ケース18等の各伝動機構16、18a等を介して出力する構成である。   A lower part of the front transmission case 3 is provided with a PTO transmission case 18 equipped with a PTO transmission mechanism 18a. The PTO transmission case 18 is provided with a PTO shaft 19 projecting forward. The PTO shaft 19 is configured to output the power of the engine 10 via the front transmission case 3 and the transmission mechanisms 16, 18 a such as the PTO transmission case 18.

前記PTO軸19には、トラクタ1腹部に装着して各種作業を行う作業機(図例では芝刈機5)を回転駆動する構成である。本発明のこのトラクタ1腹部に装着した芝刈機5の伝動装置6については後述する。   The PTO shaft 19 is configured to rotationally drive a working machine (the lawn mower 5 in the illustrated example) that is attached to the abdomen of the tractor 1 and performs various operations. The transmission device 6 of the lawn mower 5 attached to the abdomen of the tractor 1 of the present invention will be described later.

前記トラクタ1の車体フレーム2と、フロント伝動ケース3と、リヤ伝動ケース4等の下側で、前・後車輪7、8間には、芝刈機5を上下昇降自在に設ける(図1)。この芝刈機5の後述するモーアデッキ24の上側には、伝動機構20aを内装した伝動ケース20を設け、この伝動ケース20には、後方向きに前後方向の入力軸21を突出して設ける。   A lawn mower 5 is provided between the front and rear wheels 7, 8 below the body frame 2, the front transmission case 3, the rear transmission case 4 and the like of the tractor 1 so as to be movable up and down (FIG. 1). On the upper side of the mower deck 24 described later of the lawn mower 5, a transmission case 20 having a transmission mechanism 20a is provided, and the transmission case 20 is provided with an input shaft 21 protruding in the front-rear direction in a rearward direction.

前記PTO伝動ケース18のPTO軸19と、伝動ケース20の入力軸21との間には、両端部にユニバーサルジョイント22a,22aを設けた連動軸22を設けて、これらPTO軸19と入力軸21とを伝動可能に接続する構成である。もって該PTO軸19の回転がこの伝動ケース20の伝動機構20aへ入力される構成である。なお、連動軸22は所謂スプライン嵌合によって伸縮可能に伝動する軸構成としている。   Between the PTO shaft 19 of the PTO transmission case 18 and the input shaft 21 of the transmission case 20, an interlocking shaft 22 provided with universal joints 22a and 22a is provided at both ends, and the PTO shaft 19 and the input shaft 21 are provided. Are connected so that transmission is possible. Accordingly, the rotation of the PTO shaft 19 is input to the transmission mechanism 20a of the transmission case 20. The interlocking shaft 22 has a shaft configuration that can be extended and contracted by so-called spline fitting.

前記芝刈機側伝動ケース20の伝動機構20aは、図3で示す構成としている。即ち、伝動ケース20に一部内装された前後方向の前記入力軸21の軸端部に、ベベルギヤ21aを軸支して設けると共に、この伝動ケース20に内装軸支された上下方向の中間軸23の下端部側には、ベベルギヤ23aおよびヘリカルギヤ23bを軸支して設け、各ベベルギヤ21a,23aを互いに噛合させる。さらにこの中間軸23の回転は前記伝動ケース20にその上端部を軸支した縦出力軸25に設けるヘリカルギヤ25aを上記中間軸23のヘリカルギヤ23bに噛み合わせることにより、上記入力軸21の動力の回転を出力する構成である。又、該縦出力軸25の中間部には、伝動ケース20の下方においてプーリ25bを軸支している。上記縦出力軸25の左右には左・右縦伝動軸26,27を設け、これら縦出力軸25、左・右縦伝動軸26,27に夫々ブレード28,29,30を軸装すると共に、左・右縦伝動軸26,27の上端には夫々プーリ26a,27aを設け、これらプーリ26a,27aと前記縦出力軸25のプーリ25bとの間をベルト31で連動して、中央部の縦出力軸25を駆動することにより、各ブレード28,29,30を同一方向に回転して芝草の刈取を行いうる構成としている。   The transmission mechanism 20a of the lawn mower side transmission case 20 is configured as shown in FIG. In other words, a bevel gear 21a is pivotally supported at the shaft end portion of the input shaft 21 in the front-rear direction that is partially housed in the transmission case 20, and the vertical intermediate shaft 23 that is pivotally supported by the transmission case 20 is provided. A bevel gear 23a and a helical gear 23b are pivotally provided on the lower end side of the shaft, and the bevel gears 21a and 23a are engaged with each other. Further, the rotation of the intermediate shaft 23 is carried out by meshing a helical gear 25a provided on the longitudinal output shaft 25 that pivotally supports the upper end of the transmission case 20 with the helical gear 23b of the intermediate shaft 23, thereby rotating the power of the input shaft 21. Is output. In addition, a pulley 25 b is pivotally supported below the transmission case 20 at an intermediate portion of the vertical output shaft 25. Left and right vertical transmission shafts 26 and 27 are provided on the left and right sides of the vertical output shaft 25, and blades 28, 29 and 30 are mounted on the vertical output shaft 25 and the left and right vertical transmission shafts 26 and 27, respectively. Pulleys 26a and 27a are provided at the upper ends of the left and right vertical transmission shafts 26 and 27, respectively, and the pulleys 26a and 27a and the pulley 25b of the vertical output shaft 25 are interlocked by a belt 31 so that the central vertical portion By driving the output shaft 25, the blades 28, 29, and 30 are rotated in the same direction so that turfgrass can be cut.

モーアデッキ24は、一側方に刈取られた芝草を排出する排出口24aが設けられる。前記縦出力軸25、左・右縦伝動軸26,27は、二等辺三角形状の各項点部に配置される形態で、中央部の縦出力軸25がモーアデッキ24における刈取幅方向の中央部に位置し、左右両側部の左・右伝動軸26,27はこの縦出力軸25よりも後位に配置される。各軸25,26,27は、モーアデッキ24の上面において、各々軸受メタル32,33,34で軸受けしている。   The mower deck 24 is provided with a discharge port 24a for discharging turf grass cut off to one side. The vertical output shaft 25 and the left and right vertical transmission shafts 26 and 27 are arranged at the respective isosceles triangular item points, and the vertical output shaft 25 at the center is the central portion of the mower deck 24 in the cutting width direction. The left and right transmission shafts 26 and 27 on both the left and right sides are disposed rearward of the vertical output shaft 25. The shafts 25, 26 and 27 are respectively supported by bearing metals 32, 33 and 34 on the upper surface of the mower deck 24.

中央部の縦出力軸25の上端部は、このモーアデッキ24上面においてブラケット35を介して取付けられた伝動ケース20に軸受けされて、この伝動ケース20内のベベルギヤ21a,23a、中間軸23、ヘリカルギヤ23b,25aを介して、後側の入力軸21から連動される。この伝動ケース20は、縦出力軸25側ができるだけ低く形成され、入力軸21及び中間軸23側が高く形成されて、この入力軸21の位置を前記縦出力軸25の上端部よりも高い位置に設定している。又、この入力軸21及び中間軸23の位置は、縦出力軸25に対して左右いずれか一側寄りに偏位させている。   The upper end of the vertical output shaft 25 at the center is supported by a transmission case 20 mounted on the upper surface of the mower deck 24 via a bracket 35, and bevel gears 21a and 23a, an intermediate shaft 23, a helical gear 23b in the transmission case 20 are supported. , 25a to be linked from the rear input shaft 21. In this transmission case 20, the vertical output shaft 25 side is formed as low as possible, the input shaft 21 and the intermediate shaft 23 side are formed high, and the position of the input shaft 21 is set higher than the upper end of the vertical output shaft 25. doing. Further, the positions of the input shaft 21 and the intermediate shaft 23 are deviated toward the left or right side with respect to the vertical output shaft 25.

図中の符号36は検油窓を兼ねた排油穴で、前記伝動ケース20の前側で前側のゲージホイル37を接地させた状態でモーアデッキ24を前下がり傾斜姿勢にさせることにより排油を行い易い位置に設けられ、かつ、中間軸25部における高位側の伝動ケース20内部であるベベルケース部20A内の検油をしうる。この排油穴36はキャップ38を有する。39はスペース部の補強リブである。40はモーアデッキ1の上面に着脱するベルトカバーである。   Reference numeral 36 in the figure denotes an oil drain hole that also serves as an oil inspection window, and performs oil drainage by moving the moor deck 24 in a downwardly inclined posture with the front gauge wheel 37 in contact with the front side of the transmission case 20. It is possible to detect oil in the bevel case portion 20A which is provided at an easy position and which is inside the transmission case 20 on the high-order side in the intermediate shaft 25 portion. The oil drain hole 36 has a cap 38. Reference numeral 39 denotes a reinforcing rib in the space portion. A belt cover 40 is attached to and detached from the upper surface of the moor deck 1.

前記芝刈機5の支持機構、及び上下昇降機構について説明する。図1で示す如くモーアデッキ24の前端部に設けた前支持板41と、トラクタ1の車体フレーム2の前端部に垂下状態に設けた支持板42との間に、回動自在に左右一対からなる前リンク43,43を設ける。   The support mechanism of the lawn mower 5 and the up / down lifting mechanism will be described. As shown in FIG. 1, there is a pair of left and right rotatable between a front support plate 41 provided at the front end portion of the mower deck 24 and a support plate 42 provided in a suspended state at the front end portion of the vehicle body frame 2 of the tractor 1. Front links 43 and 43 are provided.

一方前記芝刈機5の後端部に設けた後支持板44と、車体フレーム2の前後中間部との間には、回動自在に左右一対からなる後リンク45,45を設ける。前記前・後リンク43,45は略平行リンク状に構成されると共に、左右の後リンク45,45のうち一方(図例では左側)の後リンク45Lの下端を延長し、該延長部45aとトラクタ1の後部に設けられた後作業機昇降リンク機構(図例では3点リンク機構)46の左右ロアリンク47のうち一方のロアリンク47L(図例では左側)との間に芝刈機昇降リンク機構48を構成している。なお、3点リンク機構46は左右ロアリンク47と図外のトップリンクとからなり、後作業機(例えば、ブロードキャスタ)を昇降自在に連結する構成としている。また、該3点リンク機構46は油圧シリンダ機構50によって上下回動するリフトアーム51によってリフトロッド52を介して連結される構成とし、手元の昇降操作レバー53を介して図外コントロールバルブを制御し後作業機を作業姿勢に降下し、または非作業姿勢に上昇させる構成である。   On the other hand, between the rear support plate 44 provided at the rear end portion of the lawn mower 5 and the front and rear intermediate portion of the vehicle body frame 2, a pair of left and right rear links 45, 45 are provided. The front / rear links 43, 45 are formed in a substantially parallel link shape, and extend the lower end of one of the left and right rear links 45, 45 (left side in the figure) of the rear link 45L, Lawn mower elevating link between one of the left and right lower links 47L (left side in the example) of the left and right lower links 47 of the rear work machine elevating link mechanism (in the example shown in the figure) 46 provided at the rear portion of the tractor 1. A mechanism 48 is configured. The three-point link mechanism 46 includes a left and right lower link 47 and a top link (not shown), and is configured to connect a rear working machine (for example, a broadcaster) so as to be movable up and down. Further, the three-point link mechanism 46 is connected via a lift rod 52 by a lift arm 51 that is rotated up and down by a hydraulic cylinder mechanism 50, and controls a control valve (not shown) via a lifting operation lever 53 at hand. In this configuration, the rear work machine is lowered to a working posture or raised to a non-working posture.

前記芝刈機昇降リンク機構48は、図5に示すように、中途部を車体フレーム2から垂下したブラケット49に突設せる水平軸に回動自在に接続した中間リンク55、該中間リンク55と前記芝刈機5側の後リンク45L延長部45aとを連結する吊下げロッド56、上記中間リンク55のボス部55aと一体的に設けるブラケット55b、該ブラケット55bと前記ロアリンク47Lの基部側リンクボール57に近い位置に着脱自在に設ける補強兼用のブラケット58との間を牽引ロッド59で連結する。   As shown in FIG. 5, the lawn mower lifting link mechanism 48 includes an intermediate link 55 rotatably connected to a horizontal shaft projecting from a bracket 49 suspended from the body frame 2, the intermediate link 55, and the intermediate link 55. A suspension rod 56 for connecting the rear link 45L extension portion 45a to the lawn mower 5 side, a bracket 55b provided integrally with the boss portion 55a of the intermediate link 55, and a base side link ball 57 of the bracket 55b and the lower link 47L. A traction rod 59 is connected to a bracket 58 which is detachably provided at a position close to.

従って、芝刈作業から非作業姿勢に芝刈機5を上昇させるときは、図5中実線で示すように、前記昇降操作レバー53を上昇側に操作すると、ロアリンク47Lが最下側からリンクボール57部を支点に上昇回動する(矢印イ方向)。ブラケット58を介して牽引ロッド59が引かれ(同ロ方向)、中間リンク55を図5においてトラクタ1腹部に装着された下向きブラケット55aのボス部55b中心に時計方向に回動し(同ハ方向)、吊下げロッド56を引き上げることとなり、芝刈機5の後リンク45L延長部45aを上昇させる。該延長部45aの上昇に伴って芝刈機5は平行移動して上昇する。   Therefore, when raising the lawn mower 5 from the lawn mowing operation to the non-working posture, as shown by the solid line in FIG. 5, when the elevating operation lever 53 is operated to the ascending side, the lower link 47L moves from the lowermost side to the link ball 57. Ascending and rotating with the part as a fulcrum (in the direction of arrow A) The pulling rod 59 is pulled through the bracket 58 (in the same direction), and the intermediate link 55 is rotated clockwise around the boss portion 55b of the downward bracket 55a attached to the abdomen of the tractor 1 in FIG. ), The suspension rod 56 is pulled up, and the rear link 45L extension 45a of the lawn mower 5 is raised. The lawn mower 5 moves up in parallel with the extension 45a.

再度芝刈機5を作業姿勢に戻すときは、昇降操作レバー53を下降側に操作する。芝刈機昇降リンク機構48は上記と逆の動きを伴なって芝刈機5を下降させる。なお、芝刈機5の前後に付設した前記ゲージ輪37,37が接地するまで降下することができる。なお、刈り高さ調整は、従来公知のように、該ゲージ輪37,37のモーアデッキ24に対する相対高さの変更に基づく。   When returning the lawn mower 5 to the working posture again, the elevating operation lever 53 is operated to the lowering side. The lawn mower elevating link mechanism 48 lowers the lawn mower 5 with the reverse movement. In addition, it can descend | fall until the said gauge rings 37 and 37 attached before and behind the lawn mower 5 contact | abut. The cutting height adjustment is based on a change in the relative height of the gauge wheels 37, 37 with respect to the mower deck 24, as conventionally known.

次いで、芝刈機5の上昇保持機構60について説明する。該芝刈機上昇保持機構60は、前記芝刈機昇降リンク機構48に組み込まれている。すなわち、前記中間リンク55のボス部55bから中間リンク55のリンクアーム部55cとは反対側に向けて延長する上昇保持用アーム部60aを設け、この上昇保持用アーム部60aとトラクタ1車体との間にストッパ部材61を設ける構成である。詳述すると、上昇保持用アーム部60aの後端側に支点ピン62を介して上下に回動自在に該ストッパ部材61を装着し、接当部61aが上昇用保持アーム部60aのアーム幅内に重合する収容姿勢Pと該接当部61aが上方に突出する起立姿勢Qとに姿勢切替できるように、上記支点ピン62から一定の距離に配設した2箇所の係止孔61b,61cと、上昇用保持アーム部60aに設ける係止孔60bとを選択的に一致させて固定ピン63を挿通する構成である。   Next, the ascending holding mechanism 60 of the lawn mower 5 will be described. The lawn mower lift holding mechanism 60 is incorporated in the lawn mower lifting link mechanism 48. In other words, a lift holding arm 60a extending from the boss 55b of the intermediate link 55 toward the opposite side of the link arm 55c of the intermediate link 55 is provided, and the lift holding arm 60a and the tractor 1 vehicle body are connected to each other. The stopper member 61 is provided between them. More specifically, the stopper member 61 is mounted on the rear end side of the ascending holding arm portion 60a via a fulcrum pin 62 so as to be pivotable up and down, so that the contact portion 61a is within the arm width of the ascending holding arm portion 60a. Two locking holes 61b, 61c disposed at a fixed distance from the fulcrum pin 62 so that the posture can be switched between a housing posture P superposed on and a standing posture Q in which the contact portion 61a protrudes upward. The fixing pin 63 is inserted through the locking hole 60b provided in the lifting holding arm 60a.

前記ストッパ部材61の接当部61aは、起立姿勢Qでトラクタ1のリヤ伝動ケース4腹部に接当することによって一体の中間リンク55の反時計方向の回動が規制され、もって芝刈機5を上昇保持できる。   The contact portion 61a of the stopper member 61 is in contact with the abdomen of the rear transmission case 4 of the tractor 1 in the standing posture Q, so that the counterclockwise rotation of the integral intermediate link 55 is restricted, and thus the lawn mower 5 is Can hold up.

前記牽引ロッド59とボス部55a側のブラケット55bとの係合は、該ブラケット55b側に突設するピン部材55dを牽引ロッド59側に形成した長孔59aに係止する構成であり、前記芝刈機上昇保持機構60にて芝刈機5を上昇位置に保持する状態のとき、前記中間リンク55はストッパ部材61の作用によって反時計方向の回動が規制されているから、前記長孔59aの範囲で牽引ロッド59は融通状態となり、ロアリンク47乃至3点リンク機構46を単独で上昇できるように構成されている。このように、芝刈機昇降リンク機構48の途中に、牽引ロッド59の長孔59a、中間リンク55のブラケット55b及びピン部材55dのような融通機構64を構成すると、3点リンク機構46を芝刈機5の昇降動作とは関係なく独立的に昇降させることができる。もって後作業機(例えばブロードキャスタ)を昇降操作レバー53の操作によって、芝刈機5の昇降とは関係なく独立して該後作業機を昇降させることができる。   The engagement between the traction rod 59 and the bracket 55b on the boss portion 55a side is such that a pin member 55d projecting on the bracket 55b side is engaged with a long hole 59a formed on the traction rod 59 side. When the lawn mower 5 is held in the raised position by the machine lifting and holding mechanism 60, the intermediate link 55 is restricted from rotating counterclockwise by the action of the stopper member 61. Thus, the tow rod 59 is in a flexible state so that the lower link 47 to the three-point link mechanism 46 can be lifted independently. As described above, when the interchange mechanism 64 such as the long hole 59a of the tow rod 59, the bracket 55b of the intermediate link 55, and the pin member 55d is formed in the middle of the lawn mower lifting link mechanism 48, the three-point link mechanism 46 is replaced with the lawn mower. 5 can be lifted and lowered independently of the lifting and lowering operation. Accordingly, the rear working machine (for example, a broadcaster) can be lifted / lowered independently by raising / lowering the lawn mower 5 by operating the lifting / lowering operation lever 53.

上記実施例では、芝刈機上昇保持機構60の一部としてのストッパ部材61を上昇用保持アーム部60a側に構成したが、トラクタ1腹部に回動自在に装着されていて、収容される収容姿勢と下方に突出する突出姿勢に切り替わる構成としてもよい。   In the above-described embodiment, the stopper member 61 as a part of the lawn mower ascending / holding mechanism 60 is configured on the ascending holding arm 60a side. However, it is rotatably mounted on the abdomen of the tractor and accommodated. It is good also as a structure switched to the protrusion attitude | position which protrudes below.

また、ストッパ部材61に2箇所の係止孔61a,61bを設けたが、これらを円弧状孔で繋いでストッパ部材61の傾斜角度を調整自在に構成することにより、保持する芝刈機5高さを任意とすることができる。   Further, the stopper member 61 is provided with two locking holes 61a and 61b. However, the height of the lawn mower 5 to be held is configured by connecting these with arcuate holes so that the inclination angle of the stopper member 61 can be adjusted. Can be arbitrary.

前記芝刈機上昇保持機構60のストッパ部材61では2箇所にいちいちピンの差し替えを行う必要があるが、ワイヤ等の連携手段66で遠隔操作によって起立姿勢Qと収容姿勢Pとを切り替える構成でもよい。図7に示す例は、ばね65で起立姿勢Qに付勢されたストッパ部材61がワイヤ66の引き操作でばね65に抗してストッパ部材61を収容姿勢Pに変更できる構成である。専用の上昇保持レバー64を備えて操作する構成としている。   In the stopper member 61 of the lawn mower ascending / holding mechanism 60, it is necessary to replace the pins at two positions one by one. However, a configuration in which the standing posture Q and the housing posture P are switched by a remote operation using a link means 66 such as a wire may be used. In the example shown in FIG. 7, the stopper member 61 urged to the standing posture Q by the spring 65 can be changed to the housing posture P against the spring 65 by pulling the wire 66. A dedicated lift holding lever 64 is provided for operation.

なお、ワイヤ66に代替して、スイッチ手段とソレノイドなどのアクチュエータを用いてストッパ部材61を操作できる構成としてもよい。一例を示せば、前記昇降操作レバー53の昇降操作範囲Lに作業機上昇操作のままでレバー移行できる延長操作範囲ΔLを設定し、該延長操作範囲ΔLに入ったか否かを検出するスイッチ67を設け、且つ昇降操作レバー53には押しボタンスイッチ68を設ける。なお該検出スイッチ67は一旦押すとONを維持し、再度押すとOFFに切り替わるプッシュスイッチとしている。   Instead of the wire 66, the stopper member 61 may be operated using an actuator such as a switch means and a solenoid. For example, an extension operation range ΔL in which the lever can be moved while moving up the work implement is set in the elevation operation range L of the elevation operation lever 53, and a switch 67 for detecting whether or not the extension operation range ΔL has been entered is set. The push button switch 68 is provided on the lifting operation lever 53. The detection switch 67 is a push switch that maintains ON when pressed once and switches to OFF when pressed again.

昇降操作レバー53が上昇側回動操作後さらにこの延長操作範囲ΔLの端部までレバー操作することによって前記検出スイッチ67をONし、この状態で押しボタンスイッチ68を一旦押すとアクチュエータとしてのソレノイド69を励磁しこの状態を維持すべく制御部70から励磁信号が出力される。該ソレノイド69の励磁によってストッパ部材61を起立姿勢Qとして芝刈機上昇保持機構60による芝刈機を上昇保持する。このまま(押しボタンスイッチ68を操作しないで)昇降操作レバー53を延長操作範囲ΔLから昇降操作範囲Lに戻した状態ではストッパ部材61の起立姿勢Qを維持し続けて、この状態で昇降操作レバー53を操作するときは、後部作業機用の3点リンク機構46を単独で昇降できる。また、昇降操作レバー53を昇降操作範囲Lから延長操作範囲ΔLに戻して、検出スイッチ67がONの状態で再度押しボタンスイッチ68を押してOFFにするとソレノイド69の励磁は解除され、ストッパ部材61は図外ばねの付勢力で収納姿勢Pになる。この場合には、昇降操作レバー53にて3点リンク機構46を上昇・下降操作するに伴って芝刈機5を昇降操作できる。   After the lifting operation lever 53 is turned upward, the detection switch 67 is turned on by operating the lever to the end of the extended operation range ΔL. When the push button switch 68 is pressed once in this state, the solenoid 69 as an actuator is operated. And an excitation signal is output from the control unit 70 to maintain this state. The lawn mower is lifted and held by the lawn mower lift holding mechanism 60 with the stopper member 61 in the standing posture Q by excitation of the solenoid 69. In this state (without operating the push button switch 68), when the lifting operation lever 53 is returned from the extended operation range ΔL to the lifting operation range L, the standing posture Q of the stopper member 61 is continuously maintained. Is operated, the three-point link mechanism 46 for the rear working machine can be moved up and down independently. Further, when the lifting operation lever 53 is returned from the lifting operation range L to the extended operation range ΔL and the detection switch 67 is turned on and the push button switch 68 is pushed again to turn it off, the excitation of the solenoid 69 is released, and the stopper member 61 is moved. The storage posture P is set by the biasing force of the non-illustrated spring. In this case, the lawn mower 5 can be lifted / lowered as the three-point link mechanism 46 is lifted / lowered by the lift operation lever 53.

次いで、前記芝刈機支持機構の前リンク43,43の具体例について説明する。前側部43aが湾曲する湾曲部43b,43bを備えた一対の湾曲アーム43c,43cと、この湾曲アーム43c,43c後端内側に位置してネジ筒43d,43dとを備え、該ネジ筒43d,43dと螺合するフロントアーム部43e,43eを有する。フロントアーム部43e,43eの後端を前記モーアデッキ24の前側上方に設けたブラケット24b,24bに接続する構成である。このように構成することにより、湾曲アーム43c,43c間隔Mに対してフロントアーム部43e、43e間隔mが小さく設定でき、前輪切角を向上できる。43fはハンドル操作でリンク機構をブラケット42に固定するロック機構である。   Next, specific examples of the front links 43 and 43 of the lawn mower support mechanism will be described. A pair of curved arms 43c, 43c provided with curved portions 43b, 43b whose front side portion 43a is curved, and screw cylinders 43d, 43d located inside the rear ends of the curved arms 43c, 43c. Front arm portions 43e and 43e screwed with 43d are provided. The rear ends of the front arm portions 43e and 43e are connected to brackets 24b and 24b provided on the upper front side of the mower deck 24. By comprising in this way, the front arm part 43e and 43e space | interval m can be set small with respect to the curved arm 43c and 43c space | interval M, and a front wheel cutting angle can be improved. Reference numeral 43f denotes a lock mechanism for fixing the link mechanism to the bracket 42 by a handle operation.

1 トラクタ
伝動リヤケース
5 芝刈機
43 前リンク
45 後リンク
46 後作業機昇降リンク機構(3点リンク機構)
48 芝刈機昇降リンク機構
53 昇降操作レバー
55 中間リンク
55b ボス部
55d ピン部材
59 牽引ロッド
59a 長孔
60 芝刈機上昇保持機構
61 ストッパ部材
61a 接当部
64 融通機構
66 連携手段(ワイヤ)
P 収納姿勢
Q 起立姿勢
1 Tractor
4 Transmission rear case 5 Lawn mower 43 Front link 45 Rear link
46 Rear work equipment lifting link mechanism (3-point link mechanism)
48 Lawn mower lifting link mechanism
53 Lifting control lever 55 Intermediate link 55b Boss
55d Pin member 59 Tow rod 59a Long hole 60 Lawn mower ascending and holding mechanism 61 Stopper member 61a Contact portion 64 Interchange mechanism 66 Cooperating means (wire)
P Storage posture Q Standing posture

Claims (2)

昇降操作レバー(53)の操作によりトラクタ(1)の車体後部の後作業機を昇降自在に連結する後作業機昇降リンク機構(46)を備え、該トラクタ(1)の腹部に前リンク(43)と後リンク(45)によって芝刈機(5)を昇降自在に装着し、該芝刈機(5)と前記後作業機昇降リンク機構(46)との間に芝刈機昇降リンク機構(48)を備え、前記後作業機昇降リンク機構(46)を昇降操作レバー(53)により昇降連動することによって前記芝刈機昇降リンク機構(48)を介して芝刈機(5)を作業状態に降下し又は非作業姿勢に上昇する構成とし、前記芝刈機昇降リンク機構(48)に芝刈機上昇保持機構(60)を組み込み、該芝刈機上昇保持機構(60)によって芝刈機(5)を上昇保持した状態で昇降操作レバー(53)を操作することにより、前記後作業機昇降リンク機構(46)を芝刈機の昇降動作とは関係なく独立的に昇降可能とする融通機構(64)を設け、
前記芝刈機昇降リンク機構(48)は、中間リンク(55)と、該中間リンク(55)と芝刈機(5)とを連結する吊下げロッド(56)と、該中間リンク(55)と後作業機昇降リンク機構(46)とを連結する牽引ロッド(59)を備え、該中間リンク(55)とトラクタ(1)車体との間に芝刈機上昇保持機構(60)としてのストッパ部材(61)を、該ストッパ部材(61)の接当部(61a)がトラクタ(1)側に接当して中間リンク(55)のボス部(55a)回りの回動を規制する起立姿勢(Q)とこの回動を許容する収納姿勢(P)とに切り替えるように構成し、この起立姿勢(Q)で一体の中間リンク(55)の回動を規制して芝刈機(5)を上昇保持する構成とし、
前記融通機構(64)は、前記牽引ロッド(59)と中間リンク(55)とを、ピン部材(55d)と長孔(59a)の係止によって構成し、前記芝刈機上昇保持機構(60)にて芝刈機(5)を上昇位置に保持する状態のとき、前記中間リンク(55)に対し前記長孔(59a)の範囲で前記牽引ロッド(59)は融通状態となり、前記後作業機昇降リンク機構(46)を単独で上昇可能に構成したことを特徴とするトラクタ用芝刈機。
A rear work machine lifting link mechanism (46) is provided for connecting the rear work machine at the rear of the vehicle body of the tractor (1) so that the rear work machine can be moved up and down by operation of the lift operation lever (53), and the front link (43 ) And the rear link (45) so that the lawn mower (5) can be freely moved up and down, and the lawn mower lifting link mechanism (48) is interposed between the lawn mower (5) and the rear work machine lifting link mechanism (46). Bei example, the rear working machine lifting linkage (46) through said mower lifting linkage (48) by lifting interlocked by the lift control lever (53) lawn mower (5) drops to the working state or The lawn mower lift holding mechanism (60) is incorporated in the lawn mower lifting link mechanism (48), and the lawn mower (5) is lifted and held by the lawn mower lift holding mechanism (60). in the lifting operation lever ( By operating the 3), setting the flexibility mechanism (64) to independently vertically movable independently of the vertical movement of the rear working machine lifting linkage (46) the lawnmower,
The lawn mower lifting link mechanism (48) includes an intermediate link (55), a suspension rod (56) for connecting the intermediate link (55) and the lawn mower (5), the intermediate link (55) and the rear link. A pulling rod (59) for connecting the work implement lifting link mechanism (46) is provided, and a stopper member (61) as a lawnmower ascending and holding mechanism (60) is provided between the intermediate link (55) and the tractor (1) vehicle body. ) In a standing posture (Q) in which the contact portion (61a) of the stopper member (61) contacts the tractor (1) side and restricts the rotation of the intermediate link (55) around the boss portion (55a). And the stowing mower (5) is held up by restricting the rotation of the integral intermediate link (55) in this standing posture (Q). With configuration,
The accommodation mechanism (64) includes the traction rod (59) and the intermediate link (55) configured by locking a pin member (55d) and a long hole (59a), and the lawnmower ascending and holding mechanism (60). When the lawn mower (5) is held in the raised position, the traction rod (59) is in a flexible state in the range of the long hole (59a) with respect to the intermediate link (55), and the rear work machine is lifted and lowered. A lawn mower for a tractor characterized in that the link mechanism (46) can be lifted independently .
芝刈機上昇保持機構(60)としての前記ストッパ部材(61)は、ばね(65)の作用によって起立姿勢(Q)を維持し、遠隔操作によって該ばね(65)に抗して収納姿勢(P)に切り替える連携手段(66)を備えた請求項1に記載のトラクタ用芝刈機。 The stopper member (61) as the lawnmower ascending / holding mechanism (60) maintains the standing posture (Q) by the action of the spring (65), and resists the spring (65) by remote control, so that the storing posture (P The tractor lawn mower according to claim 1, further comprising cooperation means (66) for switching to) .
JP2010219127A 2010-09-29 2010-09-29 Lawn mower for tractor Active JP5811524B2 (en)

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