JP2006123623A - Crawler type working vehicle - Google Patents

Crawler type working vehicle Download PDF

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Publication number
JP2006123623A
JP2006123623A JP2004311846A JP2004311846A JP2006123623A JP 2006123623 A JP2006123623 A JP 2006123623A JP 2004311846 A JP2004311846 A JP 2004311846A JP 2004311846 A JP2004311846 A JP 2004311846A JP 2006123623 A JP2006123623 A JP 2006123623A
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crawler
crawler type
traveling device
stopper
vehicle body
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JP4683183B2 (en
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Masahiro Kurokawa
雅博 黒河
Tatsuzo Murakami
達三 村上
Takeshi Tamada
武史 玉田
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Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
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Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a crawler type working vehicle relatively reduce pivoting shock as a stopper member for restricting a pivoting range of a crawler. <P>SOLUTION: A pair of approximately triangular left and right crawler type traveling devices 7 making a crawler driving sprocket 2 as an apex is provided on a driving shaft 1 at a rear part of a vehicle body. When the crawler type traveling device 7 becomes front-up and front-down, the upper and lower stoppers 28, 29 for restricting a pivoting angle of the crawler type traveling device 7 is provided on the vehicle body and a longitudinally pivotable stopper arm 30 is provided between the stoppers 28, 29. One end of the stopper arm 30 is connected to a crawler frame 5 and the other end is connected to the vehicle body side between the upper and lower stoppers 28, 29. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、農業用作業車両や建設用作業車両の構成に関し、特にクローラ式走行装置を有するクローラ式作業車両に関する。   The present invention relates to a configuration of an agricultural work vehicle or a construction work vehicle, and more particularly to a crawler work vehicle having a crawler type traveling device.

従来、車体の側部に左右一対の駆動軸を突出し、この駆動軸にクローラ用駆動スプロケットを設けると共に、駆動軸下方には従動輪または転輪を支持する支持部材を配置して、前記クローラ用駆動スプロケットと従動輪または転輪間にクローラを掛け渡して略三角形状のクローラ式走行装置を構成する作業車両が知られている。   Conventionally, a pair of left and right drive shafts protrude from the side of the vehicle body, and a crawler drive sprocket is provided on the drive shaft, and a support member for supporting a driven wheel or a wheel is disposed below the drive shaft. 2. Description of the Related Art A work vehicle is known that forms a substantially triangular crawler type traveling device by crawling a crawler between a driving sprocket and a driven wheel or a wheel.

例えば、左右一対のホイール式前輪と、左右一対の前記クローラ式の走行装置とを設け、この車体の端部には作業機を昇降自在に連結可能に構成したセミクローラ型トラクタなどが知られているが、前記略三角形状のクローラ用駆動スプロケットの駆動軸を挟んで前側と後側にそれぞれクローラ用駆動スプロケットの前後方向の揺動範囲を規制するストッパ(符号46)を配置した構成が知られている(特開2000−255465号公報)。
特開2000−255465号公報
For example, a semi-crawler tractor or the like in which a pair of left and right wheel-type front wheels and a pair of left and right crawler-type traveling devices are provided, and a work machine can be connected to the end of the vehicle body so as to be movable up and down is known. However, a configuration is known in which stoppers (symbol 46) for restricting the swing range of the crawler drive sprocket in the front-rear direction are arranged on the front side and the rear side across the drive shaft of the substantially triangular crawler drive sprocket. (JP 2000-255465 A).
JP 2000-255465 A

しかしながら、前記特開2000−255465号公報記載のクローラは、揺動するストッパがクローラの支持フレームにゴムを介して接触すると、その駆動が規制される構成である。そのためストッパがクローラの支持フレームに接触するときのショックが大きいことがあった。   However, the crawler described in Japanese Patent Laid-Open No. 2000-255465 has a configuration in which driving is restricted when a swinging stopper comes into contact with the support frame of the crawler via rubber. Therefore, there is a case where a shock is great when the stopper comes into contact with the support frame of the crawler.

本発明の課題は、クローラの揺動範囲を規制するストッパ部材として揺動ショックを比較的小さくしたクローラ式作業車両を提供することである。   An object of the present invention is to provide a crawler type work vehicle having a relatively small swing shock as a stopper member for restricting the swing range of the crawler.

上記課題は次の解決手段で解決される。
請求項1記載の発明は、車体前部の車軸に設けられた左右一対の前輪(14)と、車体後部の駆動軸(1)に設けられたクローラ用駆動スプロケット(2)を頂点にする略三角形状の左右一対のクローラ式走行装置(7)とを備えたクローラ式作業車両において、クローラ式走行装置(7)には、前記駆動軸(1)を中心に車体に対して前後方向に所定の範囲で揺動するクローラフレーム(5)を備え、さらに車体固定部材に取り付けられたクローラ式走行装置(7)が前上がりとなった場合に同走行装置(7)の揺動角を規制する下側ストッパ(29)と、前記クローラ式走行装置(7)が前下がりとなった場合に前記クローラ式走行装置(7)の揺動角を規制する上側ストッパ(28)と、一端をクローラフレーム(5)に接続し、他端を上下ストッパ(28,29)の間に配置した前後揺動自在のストッパアーム(30)とを有するクローラ揺動規制装置を備えたクローラ式作業車両である。
The above problem is solved by the following solution means.
The invention according to claim 1 is an abbreviation having a pair of left and right front wheels (14) provided on the axle at the front of the vehicle body and a crawler drive sprocket (2) provided on the drive shaft (1) at the rear of the vehicle body. In a crawler type work vehicle including a pair of left and right crawler type traveling devices (7) in a triangular shape, the crawler type traveling device (7) has a predetermined longitudinal direction with respect to the vehicle body centering on the drive shaft (1). The crawler frame (5) that swings in the range is further regulated, and the swing angle of the traveling device (7) is restricted when the crawler traveling device (7) attached to the vehicle body fixing member rises forward. A lower stopper (29), an upper stopper (28) for regulating the swing angle of the crawler type traveling device (7) when the crawler type traveling device (7) is lowered forward, and one end of the crawler frame Connect to (5), the other end A crawler type working vehicle having a crawler swing restriction device having a configuration with front and rear pivotable stopper arm (30) between the upper and lower stoppers (28, 29).

請求項2記載の発明は、前記ストッパアーム(30)又はクローラフレーム(5)には前記クローラフレームの前後揺動時に、前記ストッパアーム(30)又はクローラフレーム(5)が水平状態に復帰させる付勢手段(40)を設けた請求項1記載のクローラ式作業車両である。   According to the second aspect of the present invention, the stopper arm (30) or the crawler frame (5) is attached to the stopper arm (30) or the crawler frame (5) so that the stopper arm (30) or the crawler frame (5) is returned to a horizontal state when the crawler frame swings back and forth. The crawler work vehicle according to claim 1, further comprising a biasing means (40).

請求項1記載の発明によれば、上側ストッパ(28)と下側ストッパ(29)の取付位置がストッパアーム(30)のそれぞれ上下に位置するのでストッパアーム(30)が作動時の上下間隔、すなわちクローラ(6)の上下揺動範囲が分かり易く、クローラ走行装置(7)の生産時、又はメンテナンス時にストッパ(28,29)の取付位置の調整作業を行い易い。   According to the first aspect of the present invention, since the mounting positions of the upper stopper (28) and the lower stopper (29) are respectively located above and below the stopper arm (30), the vertical distance when the stopper arm (30) is operated, That is, it is easy to understand the vertical swing range of the crawler (6), and it is easy to adjust the mounting position of the stopper (28, 29) during production of the crawler traveling device (7) or maintenance.

請求項2記載の発明によれば、請求項1記載の発明の効果に加えて、ストッパアーム(30)の上端部に設けた付勢手段(40)は地面より比較的上方に配置されるので泥などにより、付勢手段(40)がはずれる心配がなく、また、メンテナンス性も比較的良くなる。   According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the urging means (40) provided at the upper end of the stopper arm (30) is disposed relatively above the ground. There is no fear that the urging means (40) will come off due to mud or the like, and maintenance is relatively good.

本発明の実施の形態について、以下作業車両の一例であるセミクローラ型の農業用トラクタ(以下、トラクタという)について説明する。図1には本発明の一実施の形態のトラクタの側面図を示す。
トラクタ10は車体の前部のボンネット11内部にエンジン12を載置し、このエンジン12からクラッチハウジング(図示せず)、ミッションケース13等を一体的に連結して車体の主枠としている。そしてボンネット11の左右両側には、ホイール式の一対の前輪14をセンターピボット(図示せず)を中心に対してローリング自在に設け、前記ボンネット11後部の操縦室にはステアリングポスト16を設け、その後方に操縦席19を設け、この上部にステアリングハンドル17を突出して設け、このステアリングハンドル17の回転操作により前輪14を操向する構成となっている。また車体後部には作業機8を昇降自在に連結している。
An embodiment of the present invention will be described below with respect to a semi-crawler type agricultural tractor (hereinafter referred to as a tractor) which is an example of a work vehicle. FIG. 1 shows a side view of a tractor according to an embodiment of the present invention.
The tractor 10 mounts an engine 12 inside a hood 11 at the front of the vehicle body, and a clutch housing (not shown), a transmission case 13 and the like are integrally connected to the engine 12 to form a main frame of the vehicle body. A pair of wheel-type front wheels 14 are provided on both left and right sides of the bonnet 11 so as to be rotatable about a center pivot (not shown), and a steering post 16 is provided in the cockpit at the rear of the bonnet 11. A steering seat 19 is provided on the side, and a steering handle 17 is provided so as to protrude from the upper part. The front wheel 14 is steered by rotating the steering handle 17. A work machine 8 is connected to the rear part of the vehicle body so as to be movable up and down.

クローラ式走行装置7の詳細を図2と図3の側面図(図2にはスプロケット2を図示していない)、図4の正面図、図5の背面図で説明する。
トラクタ10のクローラ式走行装置7は、鉄製フレームからなるクローラフレーム5を備え、その左右両側部には前後方向に設けた転輪支持部5aを有する構成となっている。この転輪支持部5aの前端は、前従動輪3Fの支持部を受けるように筒状の構成となっている。また、クローラフレーム5は、転輪支持部5aの内側部から上方へ向けて平板状の前後一対の立設部5b、5bを設け、この上部に駆動軸1の軸受部5cを連結した構成となっている。
Details of the crawler type traveling device 7 will be described with reference to side views of FIGS. 2 and 3 (the sprocket 2 is not shown in FIG. 2), a front view of FIG. 4, and a rear view of FIG.
The crawler type traveling device 7 of the tractor 10 includes a crawler frame 5 made of an iron frame, and has a configuration in which left and right side portions have roller support portions 5a provided in the front-rear direction. The front end of the roller support portion 5a has a cylindrical configuration so as to receive the support portion of the front driven wheel 3F. Further, the crawler frame 5 is provided with a pair of flat front and rear standing portions 5b and 5b facing upward from the inner side of the wheel support portion 5a, and a bearing portion 5c of the drive shaft 1 is connected to the upper portion. It has become.

こうして、左右一対のクローラ式走行装置7のクローラフレーム5は駆動軸1を中心として揺動可能になっている。   Thus, the crawler frame 5 of the pair of left and right crawler type traveling devices 7 can swing around the drive shaft 1.

また、前記転輪支持部5aの前端は、前従動輪3Fの支持部3Faを筒5a1内で前後に摺動させて嵌合させ、前後位置を調整可能にしている。そして、これらの前後従動輪3F、3Rの間には、前方から順に第一転輪4a、第二転輪4b、第三転輪4cを設けている。 Further, the front end of the roller support portion 5a is configured such that the support portion 3Fa of the front driven wheel 3F is slid back and forth within the cylinder 5a 1 to be fitted and the front / rear position can be adjusted. Between the front and rear driven wheels 3F and 3R, a first wheel 4a, a second wheel 4b, and a third wheel 4c are provided in this order from the front.

また、前後従動輪3F、3Rは、第一転輪4a〜第三転輪4cが接地する際、この接地面よりもやや上方に位置して、クローラ6の回転を案内する構成となっている。   Further, the front and rear driven wheels 3F and 3R are positioned slightly above the ground contact surface and guide the rotation of the crawler 6 when the first wheel 4a to the third wheel 4c are grounded. .

クローラ用駆動スプロケット2(図3)は前記ミッションケース13後部の左右外方に向けて突設する一対のクローラ用駆動スプロケット軸(駆動軸)1の先端部に設けられ、その外周部の凸部をクローラ6の多数の係合穴に噛み合せ、クローラ6を駆動する構成となっている。また、前後従動輪3F、3Rの左右幅中央部及び転輪4a、4b、4cの左右幅中央部には、クローラ6の中央突起部6a(図5)を挟み込む凹部を設け、この凹部によりクローラ6の左右ずれを規制してこの回転方向を案内する構成となっている。   The crawler drive sprocket 2 (FIG. 3) is provided at the tip of a pair of crawler drive sprocket shafts (drive shafts) 1 projecting left and right outward of the rear portion of the transmission case 13, and the convex portion of the outer peripheral portion thereof. Is engaged with a number of engagement holes of the crawler 6 to drive the crawler 6. In addition, a recess for sandwiching the central protrusion 6a (FIG. 5) of the crawler 6 is provided at the center of the left and right width of the front and rear driven wheels 3F and 3R and the center of the left and right width of the rollers 4a, 4b and 4c. 6 is configured to guide the rotation direction by restricting the right and left displacement of 6.

また本実施例のクローラ6の揺動範囲を規制するストッパアーム30は、側面視「へ」字状に折り曲がっており、その折曲部付近に回転軸30aを設け、該回転軸30aはリアアクスルハウジング24に固設されたストッパ支持フレーム36に固定されている。また、ストッパ支持フレーム36にはストッパアーム30の折曲部より上端部側の折曲片を挟んだ位置に一対のストッパ28、29を設けている。またストッパ支持フレーム36はリアアクスルハウジング24に固定されているので、ストッパアーム30の回転軸30aと一対のストッパ28,29は不動である。   Further, the stopper arm 30 for restricting the swing range of the crawler 6 according to the present embodiment is bent in a “h” shape when viewed from the side, and a rotary shaft 30a is provided in the vicinity of the bent portion. It is fixed to a stopper support frame 36 fixed to the axle housing 24. The stopper support frame 36 is provided with a pair of stoppers 28 and 29 at a position sandwiching a bent piece on the upper end side from the bent portion of the stopper arm 30. Further, since the stopper support frame 36 is fixed to the rear axle housing 24, the rotating shaft 30a of the stopper arm 30 and the pair of stoppers 28 and 29 are immovable.

これに対してストッパアーム30は回転軸30aを中心に揺動自在であり、その下端部には長穴30bが設けられ該長穴30bには転輪支持部5aから延設される係止ピン5a2が係止され、その上端部には前記ストッパ28,29に当接させる上下当接面を設けると共に引張スプリング40の一端が係止され、該スプリング40の他端がリアアクスルハウジング24に固定されている。したがって、ストッパアーム30は回転軸30aを中心にその上端部側が上方に常時付勢されている。 On the other hand, the stopper arm 30 is swingable about the rotation shaft 30a, and a long hole 30b is provided at the lower end thereof, and a locking pin extending from the wheel support portion 5a is provided in the long hole 30b. 5a 2 is locked, and an upper and lower contact surface for contacting the stoppers 28 and 29 is provided at an upper end portion thereof, and one end of the tension spring 40 is locked, and the other end of the spring 40 is fixed to the rear axle housing 24. It is fixed. Therefore, the stopper arm 30 is always urged upward at the upper end portion around the rotation shaft 30a.

また、ストッパアーム30の回転軸30aより上端部側の折曲片より、回転軸30aより下端部側の折曲片の方が長く設定されているので、小スペースでクローラ装置7の揺動を規制できる。   Further, since the bent piece on the lower end side of the rotating shaft 30a is set longer than the bent piece on the upper end side of the rotating shaft 30a of the stopper arm 30, the crawler device 7 can be swung in a small space. Can be regulated.

クローラ6は回動軸1を中心として転輪支持部5a、立設部5b、5b及び軸受部5cからなるクローラフレーム5と共に揺動可能であり、転輪支持部5aの係止ピン5a2に係止されたストッパアーム30もクローラ6の揺動に連動するが、ストッパアーム30の揺動範囲は不動の一対のストッパ28,29に規制される。 The crawler 6 can swing with a crawler frame 5 including a wheel support portion 5a, upright portions 5b and 5b and a bearing portion 5c around the rotation shaft 1, and is attached to a locking pin 5a 2 of the wheel support portion 5a. The stopped stopper arm 30 is also interlocked with the swing of the crawler 6, but the swing range of the stopper arm 30 is restricted by a pair of stationary stoppers 28 and 29.

また、ストッパアーム30の揺動はストッパアーム30の上端部に係止されたスプリング40により転輪支持部5aの長手方向が水平方向に向くように常時付勢されているので、駆動反力による転輪支持部5aの前上がり揺動が抑制される。その結果、クローラ6の牽引力の低下を防止できる。   Further, the swinging of the stopper arm 30 is always urged by the spring 40 locked to the upper end of the stopper arm 30 so that the longitudinal direction of the wheel support portion 5a is directed in the horizontal direction. The front-up swinging of the roller support portion 5a is suppressed. As a result, a decrease in the traction force of the crawler 6 can be prevented.

さらにストッパアーム30の上端部に設けたスプリング40は地面より比較的上方に配置されるので泥などにより、スプリング40がはずれる心配がなく、また、メンテナンス性も比較的良くなる。また、スプリング40の係止部がクローラフレーム軸受部5cの支持部に近い位置に配置できるので転輪支持部5a、立設部5b、5b及び軸受部5cからなるクローラフレーム5がコンパクトに軽量化が可能となる。   Furthermore, since the spring 40 provided at the upper end of the stopper arm 30 is disposed relatively above the ground, there is no fear that the spring 40 will come off due to mud or the like, and maintenance is relatively good. Further, since the locking portion of the spring 40 can be disposed at a position close to the support portion of the crawler frame bearing portion 5c, the crawler frame 5 including the wheel support portions 5a, the standing portions 5b and 5b, and the bearing portion 5c is compact and lightweight. Is possible.

また、一対のストッパ28,29は、ストッパアーム30の転輪支持部5aの係止ピン5a2による係止部とは反対側の端部(上端部)と当接する位置に配置されているので、一対のストッパ28,29は強固な軸受部5cに近い位置で支持され、その強度も確保できる。 Further, the pair of stoppers 28 and 29 are disposed at positions where they come into contact with the end portion (upper end portion) of the stopper arm 30 opposite to the engaging portion by the engaging pin 5a 2 of the wheel support portion 5a. The pair of stoppers 28 and 29 are supported at positions close to the strong bearing portion 5c, and the strength thereof can be secured.

また、前記ストッパアーム30の別形態のストッパアーム30’について図6で説明する。ストッパアーム30’は一対のストッパ28,29に挟まれる部分を有するストッパアーム30’を図6に示すカム部30b’を下側側面に有するクランク形状として、該カム部30b’の中央の凹部をクローラ6が揺動しないニュートラル部として機能させ、ここに引張スプリング47で常時凹部側に押圧されるローラ44を先端に備えた一対のアーム45,46を設けておく。このローラ44がカム部30b’の凹部と接触しているときはクローラ6はフリーに揺動するが、このローラ44がカム部30b’の凹部から前後に外れてストッパアーム30の側面に乗り上げようとすると前記スプリング47によりその動きが抑制され、クローラ6の前後方向への揺動も抑制される。   Further, another embodiment of the stopper arm 30 'of the stopper arm 30 will be described with reference to FIG. The stopper arm 30 'has a crank arm shape having a cam portion 30b' shown in FIG. 6 on the lower side surface as a stopper arm 30 'having a portion sandwiched between a pair of stoppers 28 and 29, and a concave portion at the center of the cam portion 30b'. The crawler 6 functions as a neutral portion that does not swing, and a pair of arms 45 and 46 each having a roller 44 that is constantly pressed by the tension spring 47 toward the concave portion are provided. When the roller 44 is in contact with the recess of the cam portion 30b ′, the crawler 6 swings freely. However, the roller 44 moves back and forth from the recess of the cam portion 30b ′ and rides on the side surface of the stopper arm 30. Then, the movement of the spring 47 is suppressed, and the crawler 6 is also prevented from swinging in the front-rear direction.

こうして、駆動反力からくるクローラ6の揺動を抑制することで牽引力の低下を防止することができる。また、カム部30b’にニュートラル部を設けることで通常の圃場の凹凸に追従して揺動し、湿田等で必要以上に揺動する場合には、その揺動が抑制されるため安定した走行が可能となる。   In this way, it is possible to prevent a reduction in traction force by suppressing the swing of the crawler 6 caused by the driving reaction force. In addition, by providing a neutral part on the cam part 30b ′, it swings following the irregularities of a normal field, and when it swings more than necessary in a wet paddy field, the swinging is suppressed, so stable running Is possible.

図7に示すように、クローラ6の揺動支点(駆動軸1)の下方部位のリアアクスルハウジング24の壁面と転輪支持部5aとの間に引張スプリング42を設け、転輪支持部5aの前後の揺動を抑制する構成とすることもできる。   As shown in FIG. 7, a tension spring 42 is provided between the wall surface of the rear axle housing 24 below the swing fulcrum (drive shaft 1) of the crawler 6 and the wheel support 5a. It can also be set as the structure which suppresses back and forth rocking | fluctuation.

クローラ6の揺動半径より前記引張スプリング42の揺動半径の方が小さいので、クローラ6が揺動すると、前記両方の半径差でスプリング42が引張られ揺動を抑制し、駆動反力からくる揺動を止めることでクローラ6の牽引力低下を防止できる。   Since the swing radius of the tension spring 42 is smaller than the swing radius of the crawler 6, when the crawler 6 swings, the spring 42 is pulled by the difference between the two radii to suppress the swing and come from the driving reaction force. By stopping the swinging, it is possible to prevent a decrease in the traction force of the crawler 6.

また図8に示すように、クローラ6の揺動支点(駆動軸1)の後方のリアアクスルハウジング24の壁面と転輪支持部5aの後端部との間に引張スプリング43を設け、転輪支持部5aの前上がり揺動を抑制する構成とすることもできる。   As shown in FIG. 8, a tension spring 43 is provided between the wall surface of the rear axle housing 24 behind the swing fulcrum (drive shaft 1) of the crawler 6 and the rear end portion of the wheel support 5a. It can also be set as the structure which suppresses the front rising rocking | fluctuation of the support part 5a.

転輪支持部5aの前上り揺動を抑制することで駆動反力からくる揺動を止めることができ牽引力が低下することを防止できるスプリング43で抑制することにより、積降し時はスプリング43が引張られることで揺動し、安全に積降しが可能となる。   By suppressing the forward rotation of the wheel support portion 5a, it is possible to stop the swing coming from the driving reaction force and to prevent the traction force from decreasing. When it is pulled, it swings and can be safely unloaded.

本発明は、農業用作業車両や建設用作業車両の構成に関し、前輪又は後輪をホイール式に構成したセミクローラ型作業車両の他、ホイール式車輪を備えず左右一対のクローラだけで走行する、いわゆるフルクローラ型作業車両や車体の左右前後に4つのクローラを有する作業車両に適用できる。   The present invention relates to a configuration of an agricultural work vehicle or a construction work vehicle, in addition to a semi-crawler type work vehicle in which a front wheel or a rear wheel is configured as a wheel type, and a so-called traveling with only a pair of left and right crawlers without a wheel type wheel. The present invention can be applied to a full crawler type work vehicle and a work vehicle having four crawlers on the left and right and front and rear sides of the vehicle body.

本発明の実施例のトラクタの側面図である。It is a side view of the tractor of the Example of this invention. 図1のクローラ式走行装置の側面図である。It is a side view of the crawler type traveling apparatus of FIG. スプロケットを図示した図1のクローラ式走行装置の側面図である。FIG. 2 is a side view of the crawler traveling device of FIG. 1 illustrating a sprocket. 図1のクローラ式走行装置の正面図である。It is a front view of the crawler type traveling device of FIG. 図1のクローラ式走行装置の背面図である。It is a rear view of the crawler type traveling apparatus of FIG. 本発明の別実施例のクローラ式走行装置のストッパアームの構成図である。It is a block diagram of the stopper arm of the crawler type traveling apparatus of another Example of this invention. 図1のクローラ式走行装置の側面図である。It is a side view of the crawler type traveling apparatus of FIG. 本発明の別実施例のクローラ式走行装置の平面図である。It is a top view of the crawler type traveling device of another example of the present invention.

符号の説明Explanation of symbols

1 クローラ用駆動スプロケット軸 2 クローラ用駆動スプロケット
3F、3R 従動輪 3Fa 支持部
4a、4b、4c 転輪 5 クローラフレーム(支持部材)
5a 転輪支持部 5a1
5a2 係止ピン 5b クローラフレーム立設部
5c クローラフレーム駆動軸軸受部
6 クローラ 6a 突起部
7 クローラ式走行装置 8 作業機
10 トラクタ 11 ボンネット
12 エンジン 13 ミッションケース
14 前輪 16 ステアリングポスト
17 ステアリングハンドル 19 操縦席
24 リアアクスルハウジング 28 上側ストッパ
29 下側ストッパ 30、30’ ストッパアーム
30a 回転軸 30b 長穴
30b’カム部 30c 回転軸
36 ストッパ支持フレーム
40、42、43、47 引張スプリング
44 ローラ 45、46 アーム
1 Crawler Drive Sprocket Shaft 2 Crawler Drive Sprocket 3F, 3R Driven Wheel 3Fa Support 4a, 4b, 4c Rolling Wheel 5 Crawler Frame (Support Member)
5a Rolling wheel support portion 5a 1 cylinder 5a 2 locking pin 5b crawler frame standing portion 5c crawler frame drive shaft bearing portion 6 crawler 6a projection portion 7 crawler traveling device 8 work implement 10 tractor 11 bonnet 12 engine 13 mission case 14 front wheel 16 Steering post 17 Steering handle 19 Pilot seat 24 Rear axle housing 28 Upper stopper 29 Lower stopper 30, 30 'Stopper arm 30a Rotating shaft 30b Long hole 30b' Cam portion 30c Rotating shaft 36 Stopper support frames 40, 42, 43, 47 Tension spring 44 Roller 45, 46 Arm

Claims (2)

車体前部の車軸に設けられた左右一対の前輪(14)と、車体後部の駆動軸(1)に設けられたクローラ用駆動スプロケット(2)を頂点にする略三角形状の左右一対のクローラ式走行装置(7)とを備えたクローラ式作業車両において、
クローラ式走行装置(7)には、前記駆動軸(1)を中心に車体に対して前後方向に所定の範囲で揺動するクローラフレーム(5)を備え、
さらに車体固定部材に取り付けられたクローラ式走行装置(7)が前上がりとなった場合に同走行装置(7)の揺動角を規制する下側ストッパ(29)と、前記クローラ式走行装置(7)が前下がりとなった場合に前記クローラ式走行装置(7)の揺動角を規制する上側ストッパ(28)と、一端をクローラフレーム(5)に接続し、他端を上下ストッパ(28,29)の間に配置した前後揺動自在のストッパアーム(30)とを有するクローラ揺動規制装置
を備えたことを特徴とするクローラ式作業車両。
A pair of left and right crawlers having a substantially triangular shape with a pair of left and right front wheels (14) provided on the axle at the front of the vehicle body and a crawler drive sprocket (2) provided at the drive shaft (1) at the rear of the vehicle body as vertices. In a crawler type work vehicle provided with a traveling device (7),
The crawler type traveling device (7) includes a crawler frame (5) that swings in a predetermined range in the front-rear direction with respect to the vehicle body around the drive shaft (1),
Further, when the crawler type traveling device (7) attached to the vehicle body fixing member is lifted forward, the lower stopper (29) for restricting the swing angle of the traveling device (7), and the crawler type traveling device ( The upper stopper (28) for restricting the swing angle of the crawler type traveling device (7) when the forward movement of the crawler type traveling device (7) is lowered, one end is connected to the crawler frame (5), and the other end is an upper and lower stopper (28 29), a crawler type work vehicle having a crawler swing regulating device having a stopper arm (30) which can swing back and forth.
前記ストッパアーム(30)又はクローラフレーム(5)には前記クローラフレーム(5)の前後揺動時に、前記ストッパアーム(30)又はクローラフレーム(5)が水平状態に復帰させる付勢手段(40)を設けたことを特徴とする請求項1記載のクローラ式作業車両。   The stopper arm (30) or the crawler frame (5) has a biasing means (40) for returning the stopper arm (30) or the crawler frame (5) to a horizontal state when the crawler frame (5) swings back and forth. The crawler type work vehicle according to claim 1, further comprising:
JP2004311846A 2004-10-27 2004-10-27 Crawler work vehicle Expired - Fee Related JP4683183B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008273310A (en) * 2007-04-26 2008-11-13 Iseki & Co Ltd Crawler type work vehicle
JP2009073352A (en) * 2007-09-20 2009-04-09 Mitsubishi Agricult Mach Co Ltd Working vehicle
JP2010075141A (en) * 2008-09-29 2010-04-08 Kubota Corp Transplanter
JP2010075143A (en) * 2008-09-29 2010-04-08 Kubota Corp Transplanter
JP2010184707A (en) * 2010-05-31 2010-08-26 Iseki & Co Ltd Semi-crawler device for vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6794097B2 (en) * 2015-05-25 2020-12-02 ヤンマーパワーテクノロジー株式会社 Tractor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000050711A (en) * 1998-08-12 2000-02-22 Kubota Corp Traveling apparatus for rice transplanter
JP2003291668A (en) * 2002-04-01 2003-10-15 Iseki & Co Ltd Work vehicle
JP2004255964A (en) * 2003-02-25 2004-09-16 Iseki & Co Ltd Power vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000050711A (en) * 1998-08-12 2000-02-22 Kubota Corp Traveling apparatus for rice transplanter
JP2003291668A (en) * 2002-04-01 2003-10-15 Iseki & Co Ltd Work vehicle
JP2004255964A (en) * 2003-02-25 2004-09-16 Iseki & Co Ltd Power vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008273310A (en) * 2007-04-26 2008-11-13 Iseki & Co Ltd Crawler type work vehicle
JP2009073352A (en) * 2007-09-20 2009-04-09 Mitsubishi Agricult Mach Co Ltd Working vehicle
JP2010075141A (en) * 2008-09-29 2010-04-08 Kubota Corp Transplanter
JP2010075143A (en) * 2008-09-29 2010-04-08 Kubota Corp Transplanter
JP2010184707A (en) * 2010-05-31 2010-08-26 Iseki & Co Ltd Semi-crawler device for vehicle

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