WO2019049329A1 - Dozer front equipment attachment structure - Google Patents
Dozer front equipment attachment structure Download PDFInfo
- Publication number
- WO2019049329A1 WO2019049329A1 PCT/JP2017/032558 JP2017032558W WO2019049329A1 WO 2019049329 A1 WO2019049329 A1 WO 2019049329A1 JP 2017032558 W JP2017032558 W JP 2017032558W WO 2019049329 A1 WO2019049329 A1 WO 2019049329A1
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- WIPO (PCT)
- Prior art keywords
- dozer
- tractor
- arm
- mounting structure
- connection bracket
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D49/00—Tractors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/815—Blades; Levelling or scarifying tools
Definitions
- the present invention relates to a mounting structure of a front dozer to a tractor capable of selectively mounting a front loader and a front dozer, and in particular, the rear end of the dozer arm is attached to and removed from a fulcrum pin provided on a connecting bracket for the front loader on the tractor main body side.
- the present invention relates to a mounting structure of a front dozer that is freely and rotatably mounted.
- the front loader is mounted on the front of a tractor and used for agricultural work, as is known, for example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 11-241361) and Patent Document 2 (Japanese Patent Application Laid-Open No. 2007-254972).
- the front loader has a pair of left and right lift arms, and the tip end sides of the lift arms are connected by a connecting member extending in the left-right direction.
- An attachment such as a bucket, is exchangeably attached to the tip of the lift arm.
- a proximal end plate is disposed at the proximal end of the lift arm, and the proximal end plate is detachably attached to the upper end of a vertically long connecting bracket fixed to the left and right sides of the tractor body using a docking pin or the like. It is attached.
- a front dozer that is attached to an agricultural tractor and performs dozer work such as excavated soil removal, snow removal, or soil removal without using a ground work bulldozer is disclosed, for example, in Patent Document 3 (Japanese Patent Laid-Open No. 2009-83525). It is known as Conventionally, when attaching the front doser to a tractor equipped with a front loader, first, the proximal end plate of the front loader is removed from the connecting bracket on the tractor body side by the release operation of the docking pin.
- connection bracket itself is also removed from a tractor main body.
- the dozer frame for the front dozer is attached to the tractor main body using the attachment mark of the connection bracket, and the arm (dozer arm) of the front dozer is attached to the dozer frame with a bolt and a nut I was on my mind. That is, although the front loader and the front dozer share the attachment position on the tractor body side, the attachment structures are completely independent.
- connection bracket of the front loader is left as it is, and the rear end of the dozer arm of the front dozer is removably and rotatably attached to the connection bracket. It is about making it possible.
- the present invention relates to a mounting structure of a front dozer for a tractor in which a base end portion of a front loader is detachably mounted to a pair of left and right connecting brackets disposed on the tractor body side.
- a front dozer mounting structure rear end portions of a pair of left and right dozer arms of the front dozer are detachably and rotatably attached to fulcrum pins disposed on the connection bracket.
- the connecting bracket for the front loader is a tractor
- the front dozer can be attached easily and quickly without removing it from the main body.
- FIG. 1A is a left side view of the entire tractor
- FIG. 1B is a right side view.
- the tractor 100 is basically configured symmetrically.
- a driver's seat 10 and a bonnet 20 are disposed on the upper portion of the main body of the tractor 100.
- the rotational power of the engine in the bonnet 20 is transmitted to the left and right front wheels 30, 30 and the left and right rear wheels 40, 40 via the transmission mechanism of the transmission case.
- a cylinder case 50 in which a lifting hydraulic cylinder for a rear working machine is installed is disposed at the rear of the tractor body.
- Connection brackets 61 for a front loader 60 are disposed on the left and right sides of the bonnet 20 so as to be located between the front wheel 30 and the rear wheel 40.
- the connection bracket 61 is in the form of a vertically long plate, and at the lower end thereof, arm portions 61a, 61b, 61c fixed to the side surface of the chassis of the tractor main body are integrally formed.
- the arm portions 61a, 61b, 61c are fixed to the side surface of the main body chassis by the bolt connecting portions 62a, 62b, 62c.
- the connecting bracket 61 is thus fixed to the tractor main body, and the base end plate 62 of the front loader 60 is detachably mounted on the upper end portion of the connecting bracket 61 using a docking pin or the like.
- the front loader 60 has a proximal end plate 62, a loader arm 63, a lift cylinder 64, a dump cylinder 65 and a bucket 66.
- the loader cylinder 63 lifts and lowers the loader arm 63, and the dump cylinder 65 swings the bucket 66.
- a cylinder frame 70 is disposed at the front center of the bonnet 20.
- the cylinder frame 70 is for supporting the vertical lift cylinder 81 of the front dozer 80.
- the cylinder frame 70 extends horizontally rearward from the front center lower portion of the bonnet 20, passing over the front wheel axle 31, from a pair of left and right rising portions 70a extending obliquely upward and forward from the front center lower portion of the bonnet 20. And a pair of left and right fixing portions 70b fixed by bolts.
- a main body 81a of the lift cylinder 81 is detachably attachable to a central portion of a connecting portion 70c connecting upper end portions of the left and right rising portions 70a to each other.
- the front dozer 80 has a dozer arm 82 whose front end is suspended and supported by a lift cylinder 81, and a dozer plate 83 attached to the front end of the dozer arm 82.
- the dozer plate 83 has almost the same width as the bucket 66 of the front loader 60 as shown in FIG. 2 and is suitable for dozer work such as digging soil, removing snow and clearing, as shown in FIGS. 1A and 1B. It is formed in a curved plate shape.
- the dozer arm 82 is constituted by a frame body having a width that fits with a margin between the left and right front wheels 30, 30 so as not to interfere with the front wheel steering.
- the frame body compact in the width direction, it is possible to perform small turning steering with the front wheel turning angle of the tractor increased.
- the dozer arm 82 between the left and right front wheels 30, 30, it is possible to arbitrarily select the dozer plate 83 which is optimum for the width of the tractor.
- the dozer arm 82 has a bending portion 82a positioned below the front wheel axle 31 of the tractor 100 in the vertical direction at the middle in the front-rear direction.
- the rear half 82 b of the dozer arm 82 extends from the bending portion toward the fulcrum pin 90 of the connection bracket 61 of the front loader 60.
- the dozer arm 82 has a front half 82c extending substantially horizontally from the bending portion 82a in the middle to the front side, and a rear half 82b extending rearward and upward from the bending portion 82a toward the fulcrum pin 90, The rear end of the rear half 82 b is detachably attached to the fulcrum pin 90.
- the bending shape of the dozer arm 82 allows the dozer arm 82 to be configured to be relatively short, and to avoid interference with the front wheel axle 31 at the maximum ascent of the front dozer 80.
- the fulcrum pin 90 is inserted into the lateral holes 91a of a pair of brackets 91 welded to the lower end of the connection bracket 61, and both ends of the fulcrum pin 90 are fixed to the lateral hole 91a. ing. Since the bracket 91 may be attached to the lower end portion of the connection bracket 61 by welding, the conventional connection bracket 61 can be easily diverted.
- Attachment of the rear end of the rear half 82b of the dozer arm 82 to the fulcrum pin 90 is performed by a so-called split bearing 92 using a fulcrum holder 92a, as shown in FIGS. 4A to 6. That is, the rear end of the rear half 82b of the dozer arm 82 has a semicircular bearing recess 82d that matches the circular outer peripheral surface of the fulcrum pin 90, and an ear 82e located on both sides of the bearing recess 82d.
- the fulcrum holder 92a has a semicircular bearing recess 92d facing the bearing recess 82d and ears 92e located on both sides of the bearing recess 92d.
- Both ears 82e and 92e have through holes for inserting hexagonal head bolts 93, and insert hexagonal head bolts 93 into the through holes from the fulcrum holder 92a side, and screw the tip of the hexagonal head bolts 93
- the nut 94 is attached to 93 a and the fulcrum holder 92 a is tightened toward the fulcrum pin 90 so that the rear half 82 b of the dozer arm 82 is rotatably coupled to the fulcrum pin 90.
- the fulcrum pin 90 is supported by the connection bracket at a position slightly behind the front wheel axle 31 of the tractor 100 and slightly lower than the front wheel axle 31. Therefore, the horizontal reaction force of the front dozer 80 can be stably received by the fulcrum pin 90, and the dozer operation can be performed efficiently.
- FIG. 1A and FIG. 1B show a state in which both the front loader 60 and the front dozer 80 are attached to the tractor body, in actuality, they are not used simultaneously. When the front loader 60 is used, the front dozer 80 is removed, and vice versa.
- FIG. 1A it is assumed that only the front loader 60 is attached to the tractor body, and the front dozer 80 is removed from the tractor body.
- the front loader 60 is first removed from the connection bracket 61.
- the lift cylinder 64 is operated to lower the bucket 66 of the front loader 60 to the ground, and in this state, the docking pin of the proximal end plate 62 is released to separate the proximal end plate 62 from the connection bracket 61 .
- the hydraulic coupler for supplying the hydraulic pressure to the lift cylinder 64 and the dump cylinder 65 is also separated from the tractor body.
- the tractor is moved a little backward, and the front dozer 80 is placed on the garage jack and moved to the lower side of the tractor body. Then, the front dozer 80 is lifted by the garage jack, and the rear end of the rear half 82b of the dozer arm 82 is connected to the fulcrum pin 90 as shown in FIGS.
- the fulcrum holder 92a can be attached with the rear end of the rear half 82b of the dozer arm 82 deposited on the fulcrum pin 90, the insertion work of the hex head bolt 93 and the tightening operation of the nut 94 are performed. It can be done easily. Further, since it is only necessary to loosen and remove the nut 94 when separating the dozer arm 82 from the fulcrum pin 90, it is possible to make the dozer arm 82 easily and quickly and easily to improve the workability.
- the fulcrum pin 90 is a fixed type and the split bearing 92 is used in the above embodiment, a structure in which the split bearing 92 is changed to an integral bearing and the fulcrum pin 90 can be pulled out in and out with respect to the bracket 91 You may change it.
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Abstract
A dozer front equipment attachment structure for a tractor 100 to which a front-end loader 60 and dozer front equipment 80 can be removably mounted. The base end of the front-end loader 60 can be removably mounted to a pair of left and right connection brackets 61 disposed on and fixed to the tractor body. The rear ends of a pair of left and right dozer arms 82 of the dozer front equipment 80 are removably and rotatably mounted to a rocking pin 90 disposed on the connection brackets 61.
Description
本発明はフロントローダとフロントドーザを選択的に装着可能なトラクタに対するフロントドーザの取付構造に係り、特にトラクタ本体側のフロントローダ用の連結ブラケットに設けた支点ピンに、ドーザアームの後端部を着脱自在かつ回動自在に装着するようにしたフロントドーザの取付構造に関する。
The present invention relates to a mounting structure of a front dozer to a tractor capable of selectively mounting a front loader and a front dozer, and in particular, the rear end of the dozer arm is attached to and removed from a fulcrum pin provided on a connecting bracket for the front loader on the tractor main body side. The present invention relates to a mounting structure of a front dozer that is freely and rotatably mounted.
フロントローダは、例えば特許文献１（特開平１１－２４１３６１号公報）や特許文献２（特開２００７－２５４９７２号公報）で公知のように、トラクタの前部に装着して農作業等に使用する。フロントローダは左右一対のリフトアームを有し、当該リフトアームの先端側が左右方向に延びる連結部材で連結されている。そしてリフトアームの先端部にバケット等のアタッチメントを交換可能に装着するようにしている。リフトアームの基端部には基端プレートが配設され、当該基端プレートが、ドッキングピン等を使用して、トラクタ本体の左右両側に固定された縦長の連結ブラケットの上端部に着脱自在に装着される。
The front loader is mounted on the front of a tractor and used for agricultural work, as is known, for example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 11-241361) and Patent Document 2 (Japanese Patent Application Laid-Open No. 2007-254972). The front loader has a pair of left and right lift arms, and the tip end sides of the lift arms are connected by a connecting member extending in the left-right direction. An attachment, such as a bucket, is exchangeably attached to the tip of the lift arm. A proximal end plate is disposed at the proximal end of the lift arm, and the proximal end plate is detachably attached to the upper end of a vertically long connecting bracket fixed to the left and right sides of the tractor body using a docking pin or the like. It is attached.
一方、土工用ブルドーザを使用せずに、農業用トラクタに装着して土の掘削押土、除雪、整地などのドーザ作業を行うフロントドーザは、例えば特許文献３（特開２００９－８３５２５号公報）のように公知である。従来、フロントローダを装着したトラクタにフロントドーザを取り付ける場合、まずフロントローダの基端プレートをドッキングピンの解除作動でトラクタ本体側の連結ブラケットから取り外す。
On the other hand, a front dozer that is attached to an agricultural tractor and performs dozer work such as excavated soil removal, snow removal, or soil removal without using a ground work bulldozer is disclosed, for example, in Patent Document 3 (Japanese Patent Laid-Open No. 2009-83525). It is known as Conventionally, when attaching the front doser to a tractor equipped with a front loader, first, the proximal end plate of the front loader is removed from the connecting bracket on the tractor body side by the release operation of the docking pin.
さらに当該連結ブラケット自体もトラクタ本体から取り外す。そして、例えば特許文献３のように、フロントドーザ用のドーザフレームを前記連結ブラケットの取り付け跡を利用してトラクタ本体に取り付け、当該ドーザフレームにフロントドーザのアーム（ドーザアーム）をボルトとナットで取り付けるようにしていた。すなわち、フロントローダとフロントドーザは、トラクタ本体側の取り付け位置は共用するが、取り付け構造はそれぞれまったく別個独立であった。
Furthermore, the said connection bracket itself is also removed from a tractor main body. Then, for example, as in Patent Document 3, the dozer frame for the front dozer is attached to the tractor main body using the attachment mark of the connection bracket, and the arm (dozer arm) of the front dozer is attached to the dozer frame with a bolt and a nut I was on my mind. That is, although the front loader and the front dozer share the attachment position on the tractor body side, the attachment structures are completely independent.
しかし、前述のように取り付け構造がまったく別個独立であると、ドーザフレームやボルト等の部品点数が増える。またフロントドーザを取り付けるのに、いちいちフロントローダ及び連結ブラケットを取り外さなくてはならない。同様にフロントローダを取り付けるのにも、いちいちフロントドーザ及びドーザフレームを取り外さなくてはならない。したがって、フロントローダとフロントドーザを取り替える際の作業性が悪いという課題があった。
However, if the mounting structure is completely separate as described above, the number of parts such as dozer frames and bolts increases. Also, in order to attach the front dozer, it is necessary to remove the front loader and the connecting bracket. Similarly, to attach the front loader, it is necessary to remove the front dozer and the dozer frame one by one. Therefore, there is a problem that the workability at the time of replacing the front loader and the front dozer is poor.
そこで本発明の目的は、フロントローダを取り外してフロントドーザを装着する場合、フロントローダの連結ブラケットはそのままにして、当該連結ブラケットに、フロントドーザのドーザアーム後端部を着脱自在かつ回動自在に取り付け可能にすることにある。
Therefore, when the front loader is removed and the front dozer is mounted, the connection bracket of the front loader is left as it is, and the rear end of the dozer arm of the front dozer is removably and rotatably attached to the connection bracket. It is about making it possible.
前記課題を解決するため、本発明は、フロントローダの基端部が、トラクタ本体側に配設された左右一対の連結ブラケットに対して着脱自在に装着されるトラクタに対するフロントドーザの取付構造において、前記フロントドーザの左右一対のドーザアームの後端部を、前記連結ブラケットに配設された支点ピンに着脱自在かつ回動自在に装着するようにしたことを特徴とするフロントドーザの取付構造である。
In order to solve the above-mentioned problems, the present invention relates to a mounting structure of a front dozer for a tractor in which a base end portion of a front loader is detachably mounted to a pair of left and right connecting brackets disposed on the tractor body side. In the front dozer mounting structure, rear end portions of a pair of left and right dozer arms of the front dozer are detachably and rotatably attached to fulcrum pins disposed on the connection bracket.
本発明は、トラクタ本体側のフロントローダ用の連結ブラケットに配設した支点ピンに、ドーザアームの後端部を着脱自在かつ回動自在に装着するようにしたので、フロントローダ用の連結ブラケットをトラクタ本体から取り外すことなくフロントドーザを簡単迅速に装着することができる。
According to the present invention, since the rear end of the dozer arm is detachably and rotatably attached to the fulcrum pin disposed on the connecting bracket for the front loader of the tractor main body, the connecting bracket for the front loader is a tractor The front dozer can be attached easily and quickly without removing it from the main body.
以下、本発明のフロントドーザの取付構造を有する農業用トラクタ１００の実施形態を図面を参照して説明する。図１Ａはトラクタ全体の左側面図、図１Ｂは右側面図である。トラクタ１００は基本的に左右対称に構成されている。
Hereinafter, an embodiment of an agricultural tractor 100 having a front dozer mounting structure of the present invention will be described with reference to the drawings. FIG. 1A is a left side view of the entire tractor, and FIG. 1B is a right side view. The tractor 100 is basically configured symmetrically.
トラクタ１００の本体上部には運転席１０とボンネット２０が配設されている。ボンネット２０内のエンジンの回転動力が、ミッションケースの伝動機構を経由して、左右前輪３０、３０及び左右後輪４０、４０に伝達される。またトラクタ本体の後部には、リヤ作業機の昇降用油圧シリンダを内装したシリンダケース５０が配設されている。
A driver's seat 10 and a bonnet 20 are disposed on the upper portion of the main body of the tractor 100. The rotational power of the engine in the bonnet 20 is transmitted to the left and right front wheels 30, 30 and the left and right rear wheels 40, 40 via the transmission mechanism of the transmission case. A cylinder case 50 in which a lifting hydraulic cylinder for a rear working machine is installed is disposed at the rear of the tractor body.
ボンネット２０の左右両側には、フロントローダ６０用の連結ブラケット６１が、前輪３０と後輪４０の間に位置するように配設されている。当該連結ブラケット６１は縦長板状であって、その下端部に、トラクタ本体のシャーシ側面に固定される腕部６１ａ、６１ｂ、６１ｃが一体形成されている。
Connection brackets 61 for a front loader 60 are disposed on the left and right sides of the bonnet 20 so as to be located between the front wheel 30 and the rear wheel 40. The connection bracket 61 is in the form of a vertically long plate, and at the lower end thereof, arm portions 61a, 61b, 61c fixed to the side surface of the chassis of the tractor main body are integrally formed.
そして当該腕部６１ａ、６１ｂ、６１ｃがボルト連結部６２ａ、６２ｂ、６２ｃによって本体シャーシ側面に固定されている。連結ブラケット６１はこのようにしてトラクタ本体に固定され、その上端部に、ドッキングピン等を使用してフロントローダ６０の基端プレート６２が着脱自在に装着されている。
The arm portions 61a, 61b, 61c are fixed to the side surface of the main body chassis by the bolt connecting portions 62a, 62b, 62c. The connecting bracket 61 is thus fixed to the tractor main body, and the base end plate 62 of the front loader 60 is detachably mounted on the upper end portion of the connecting bracket 61 using a docking pin or the like.
フロントローダ６０は、基端プレート６２、ローダアーム６３、リフトシリンダ６４、ダンプシリンダ６５及びバケット６６を有する。リフトシリンダ６４でローダアーム６３を昇降させ、ダンプシリンダ６５でバケット６６を揺動させるようになっている。
The front loader 60 has a proximal end plate 62, a loader arm 63, a lift cylinder 64, a dump cylinder 65 and a bucket 66. The loader cylinder 63 lifts and lowers the loader arm 63, and the dump cylinder 65 swings the bucket 66.
ボンネット２０の前側中央にはシリンダフレーム７０が配設されている。当該シリンダフレーム７０は、フロントドーザ８０の垂直なリフトシリンダ８１を支持するためのものである。シリンダフレーム７０は、ボンネット２０の前側中央下部から斜め上方前方に延びた左右一対の立ち上がり部７０ａと、ボンネット２０の前側中央下部から前輪車軸３１の上を通って水平後方側へと延び、トラクタ本体にボルトで固定された左右一対の固定部７０ｂとを有する。そして左右の立ち上がり部７０ａの上端部相互を連結する連結部７０ｃの中央部に、リフトシリンダ８１の本体部８１ａが着脱自在に取り付け可能とされている。
A cylinder frame 70 is disposed at the front center of the bonnet 20. The cylinder frame 70 is for supporting the vertical lift cylinder 81 of the front dozer 80. The cylinder frame 70 extends horizontally rearward from the front center lower portion of the bonnet 20, passing over the front wheel axle 31, from a pair of left and right rising portions 70a extending obliquely upward and forward from the front center lower portion of the bonnet 20. And a pair of left and right fixing portions 70b fixed by bolts. A main body 81a of the lift cylinder 81 is detachably attachable to a central portion of a connecting portion 70c connecting upper end portions of the left and right rising portions 70a to each other.
フロントドーザ８０は、リフトシリンダ８１によって前端部が吊り下げ支持されたドーザアーム８２と、当該ドーザアーム８２の前端部に取り付けられたドーザプレート８３を有する。ドーザプレート８３は図２のようにフロントローダ６０のバケット６６とほぼ同幅で、土の掘削押土、除雪、整地などのドーザ作業に適するように、図１Ａ、図１Ｂのように側面視で湾曲板状に形成されている。
The front dozer 80 has a dozer arm 82 whose front end is suspended and supported by a lift cylinder 81, and a dozer plate 83 attached to the front end of the dozer arm 82. The dozer plate 83 has almost the same width as the bucket 66 of the front loader 60 as shown in FIG. 2 and is suitable for dozer work such as digging soil, removing snow and clearing, as shown in FIGS. 1A and 1B. It is formed in a curved plate shape.
ドーザアーム８２は、図３から分かるように前輪操舵と干渉しないように左右前輪３０、３０の間に余裕をもって収まる横幅寸法のフレーム体で構成されている。このように幅方向でコンパクトなフレーム体とすることで、トラクタの前輪切れ角を大きくした小回り旋回操舵が可能になる。またドーザアーム８２を左右前輪３０、３０の間に通すことで、トラクタの車幅に最適なドーザプレート８３を任意に選択することができる。
As can be seen from FIG. 3, the dozer arm 82 is constituted by a frame body having a width that fits with a margin between the left and right front wheels 30, 30 so as not to interfere with the front wheel steering. As described above, by making the frame body compact in the width direction, it is possible to perform small turning steering with the front wheel turning angle of the tractor increased. Further, by inserting the dozer arm 82 between the left and right front wheels 30, 30, it is possible to arbitrarily select the dozer plate 83 which is optimum for the width of the tractor.
このドーザアーム８２は、図１Ａと図１Ｂに示すように、その前後方向中間部に、トラクタ１００の前輪車軸３１の垂直方向下方に位置する屈曲部８２ａを有する。当該屈曲部から、フロントローダ６０の連結ブラケット６１の支点ピン９０に向かってドーザアーム８２の後半部８２ｂが延びている。
As shown in FIGS. 1A and 1B, the dozer arm 82 has a bending portion 82a positioned below the front wheel axle 31 of the tractor 100 in the vertical direction at the middle in the front-rear direction. The rear half 82 b of the dozer arm 82 extends from the bending portion toward the fulcrum pin 90 of the connection bracket 61 of the front loader 60.
すなわち、ドーザアーム８２はその中間部の屈曲部８２ａから前側にほぼ水平方向に延びた前半部８２ｃと、屈曲部８２ａから支点ピン９０に向かって後方上方側に延びた後半部８２ｂとを有し、当該後半部８２ｂの後端が支点ピン９０に着脱自在に取り付けられている。ドーザアーム８２の当該屈曲形状によって、ドーザアーム８２を比較的短く構成することができると共に、フロントドーザ８０の最大上昇時における前輪車軸３１との干渉を回避するようにしている。
That is, the dozer arm 82 has a front half 82c extending substantially horizontally from the bending portion 82a in the middle to the front side, and a rear half 82b extending rearward and upward from the bending portion 82a toward the fulcrum pin 90, The rear end of the rear half 82 b is detachably attached to the fulcrum pin 90. The bending shape of the dozer arm 82 allows the dozer arm 82 to be configured to be relatively short, and to avoid interference with the front wheel axle 31 at the maximum ascent of the front dozer 80.
支点ピン９０は、図４Ａ、図４Ｂに示すように、連結ブラケット６１の下端部に溶接付けされた一対のブラケット９１の横穴９１ａに挿入され、当該支点ピン９０の両端が当該横穴９１ａに固定されている。ブラケット９１は溶接で連結ブラケット６１の下端部に取り付ければよいので、従来の連結ブラケット６１を容易に転用することができる。
As shown in FIGS. 4A and 4B, the fulcrum pin 90 is inserted into the lateral holes 91a of a pair of brackets 91 welded to the lower end of the connection bracket 61, and both ends of the fulcrum pin 90 are fixed to the lateral hole 91a. ing. Since the bracket 91 may be attached to the lower end portion of the connection bracket 61 by welding, the conventional connection bracket 61 can be easily diverted.
支点ピン９０に対するドーザアーム８２の後半部８２ｂの後端の取り付けは、図４Ａ～図６に示すように、支点ホルダ９２ａを使用したいわゆる割形軸受９２で行っている。すなわち、ドーザアーム８２の後半部８２ｂの後端は、支点ピン９０の円形外周面に符合する半円状の軸受凹部８２ｄと、当該軸受凹部８２ｄの両側に位置する耳部８２ｅを有する。また、支点ホルダ９２ａは前記軸受凹部８２ｄに対向する半円状の軸受凹部９２ｄと、当該軸受凹部９２ｄの両側に位置する耳部９２ｅを有する。
Attachment of the rear end of the rear half 82b of the dozer arm 82 to the fulcrum pin 90 is performed by a so-called split bearing 92 using a fulcrum holder 92a, as shown in FIGS. 4A to 6. That is, the rear end of the rear half 82b of the dozer arm 82 has a semicircular bearing recess 82d that matches the circular outer peripheral surface of the fulcrum pin 90, and an ear 82e located on both sides of the bearing recess 82d. The fulcrum holder 92a has a semicircular bearing recess 92d facing the bearing recess 82d and ears 92e located on both sides of the bearing recess 92d.
双方の耳部８２ｅ、９２ｅは六角頭付ボルト９３を挿通する貫通穴を有し、当該貫通穴に支点ホルダ９２ａ側から六角頭付ボルト９３を挿入し、当該六角頭付ボルト９３の先端ネジ部９３ａにナット９４を装着して支点ホルダ９２ａを支点ピン９０に向けて締め付けることで、ドーザアーム８２の後半部８２ｂを支点ピン９０に回動自在に連結するようにしている。
Both ears 82e and 92e have through holes for inserting hexagonal head bolts 93, and insert hexagonal head bolts 93 into the through holes from the fulcrum holder 92a side, and screw the tip of the hexagonal head bolts 93 The nut 94 is attached to 93 a and the fulcrum holder 92 a is tightened toward the fulcrum pin 90 so that the rear half 82 b of the dozer arm 82 is rotatably coupled to the fulcrum pin 90.
支点ピン９０は、トラクタ１００の前輪車軸３１の後方側であって、当該前輪車軸３１よりもやや低い位置で連結ブラケットに支持されている。したがって、フロントドーザ８０の水平反力を支点ピン９０によって安定的に受け止めてドーザ作業を効率的に行うことができる。
The fulcrum pin 90 is supported by the connection bracket at a position slightly behind the front wheel axle 31 of the tractor 100 and slightly lower than the front wheel axle 31. Therefore, the horizontal reaction force of the front dozer 80 can be stably received by the fulcrum pin 90, and the dozer operation can be performed efficiently.
本発明の実施形態に係るフロントドーザの取付構造は以上の通りである。図１Ａ、図１Ｂではフロントローダ６０とフロントドーザ８０の両方をトラクタ本体に装着した状態を示しているが、実際はこれらを同時に使用することはない。フロントローダ６０を使用する場合はフロントドーザ８０を取り外し、逆の場合も同様である。
The mounting structure of the front dozer according to the embodiment of the present invention is as described above. Although FIG. 1A and FIG. 1B show a state in which both the front loader 60 and the front dozer 80 are attached to the tractor body, in actuality, they are not used simultaneously. When the front loader 60 is used, the front dozer 80 is removed, and vice versa.
いま、図１Ａでフロントローダ６０のみがトラクタ本体に装着され、フロントドーザ８０はトラクタ本体から取り外されているとする。この状態からフロントドーザ８０を装着する場合、まずフロントローダ６０を連結ブラケット６１から取り外す。この取り外し作業は、まずリフトシリンダ６４を操作してフロントローダ６０のバケット６６を地面に降ろし、この状態で基端プレート６２のドッキングピンを解除作動して連結ブラケット６１から基端プレート６２を分離する。またリフトシリンダ６４とダンプシリンダ６５に油圧を供給する油圧カプラもトラクタ本体から分離する。
Now, in FIG. 1A, it is assumed that only the front loader 60 is attached to the tractor body, and the front dozer 80 is removed from the tractor body. When mounting the front doser 80 from this state, the front loader 60 is first removed from the connection bracket 61. In this removal operation, first, the lift cylinder 64 is operated to lower the bucket 66 of the front loader 60 to the ground, and in this state, the docking pin of the proximal end plate 62 is released to separate the proximal end plate 62 from the connection bracket 61 . Also, the hydraulic coupler for supplying the hydraulic pressure to the lift cylinder 64 and the dump cylinder 65 is also separated from the tractor body.
次にトラクタを少し後方に移動させ、フロントドーザ８０をガレージジャッキに載せてトラクタ本体の下側に移動する。そしてガレージジャッキでフロントドーザ８０を持ち上げ、そのドーザアーム８２の後半部８２ｂの後端を図５、図６のように支点ピン９０に連結する。
Next, the tractor is moved a little backward, and the front dozer 80 is placed on the garage jack and moved to the lower side of the tractor body. Then, the front dozer 80 is lifted by the garage jack, and the rear end of the rear half 82b of the dozer arm 82 is connected to the fulcrum pin 90 as shown in FIGS.
この連結の際、ドーザアーム８２の後半部８２ｂの後端を支点ピン９０に預けた状態にして支点ホルダ９２ａを取り付けることができるので、六角頭付ボルト９３の挿通作業やナット９４の締付作業を楽に行うことができる。またドーザアーム８２を支点ピン９０から分離する際もナット９４を緩めて外すだけでよいから、ドーザアーム８２の着脱作業を簡単迅速にして作業性を向上することができる。ドーザアーム８２の連結作業が終わると、最後にリフトシリンダ８１の本体部８１ａの上端を、シリンダフレーム７０の立ち上がり部７０ａの上端部相互を連結する連結部７０ｃの中央部に連結する。
In this connection, since the fulcrum holder 92a can be attached with the rear end of the rear half 82b of the dozer arm 82 deposited on the fulcrum pin 90, the insertion work of the hex head bolt 93 and the tightening operation of the nut 94 are performed. It can be done easily. Further, since it is only necessary to loosen and remove the nut 94 when separating the dozer arm 82 from the fulcrum pin 90, it is possible to make the dozer arm 82 easily and quickly and easily to improve the workability. When the connecting operation of the dozer arm 82 is completed, the upper end of the main body 81a of the lift cylinder 81 is finally connected to the central portion of the connecting portion 70c connecting the upper ends of the rising portions 70a of the cylinder frame 70 to each other.
以上、本発明の一実施形態について説明したが、本発明は前記実施形態に限定されることなく種々の変形が可能である。例えば前記実施形態では支点ピン９０を固定型にして割形軸受９２を使用したが、割形軸受９２を一体形軸受に変えると共に支点ピン９０をブラケット９１に対して横方向に抜き差し可能な構造に変更してもよい。
As mentioned above, although one Embodiment of this invention was described, this invention can be variously deformed without being limited to the said embodiment. For example, although the fulcrum pin 90 is a fixed type and the split bearing 92 is used in the above embodiment, a structure in which the split bearing 92 is changed to an integral bearing and the fulcrum pin 90 can be pulled out in and out with respect to the bracket 91 You may change it.
１００：農業用トラクタ １０：運転席
２０：ボンネット ３０：前輪
３１：前輪車軸 ４０：後輪
５０：シリンダケース ６０：フロントローダ
６１：連結ブラケット ６１ａ～６１ｃ：連結ブラケットの腕部
６２：基端プレート ６２ａ～６２ｃ：ボルト連結部
６３：ローダアーム ６４：リフトシリンダ
６５：ダンプシリンダ ６６：バケット
７０：シリンダフレーム ７０ａ：立ち上がり部
７０ｂ：固定部 ７０ｃ：連結部
８０：フロントドーザ ８１：リフトシリンダ
８１ａ：シリンダ本体部 ８２：ドーザアーム
８２ａ：ドーザアームの屈曲部 ８２ｂ：ドーザアームの後半部
８２ｃ：前半部 ８２ｄ：軸受凹部
８２ｅ：耳部 ８３：ドーザプレート
９０：支点ピン ９１：ブラケット
９１ａ：横穴 ９２：割形軸受
９２ａ：支点ホルダ ９２ｄ：軸受凹部
９２ｅ：耳部 ９３：六角頭付ボルト
９３ａ：先端ネジ部 ９４：ナット 100: agricultural tractor 10: driver's seat 20: bonnet 30: front wheel 31: front wheel axle 40: rear wheel 50: cylinder case 60: front loader 61: connectingbracket 61a to 61c: connecting bracket arm 62: base end plate 62a -62c: bolt connecting portion 63: loader arm 64: lift cylinder 65: dump cylinder 66: bucket 70: cylinder frame 70a: rising portion 70b: fixing portion 70c: connecting portion 80: front dozer 81: lift cylinder 81a: cylinder main portion 82: Dozer arm 82a: Dozer arm bending part 82b: Dozer arm rear part 82c: First part 82d: Bearing recess 82e: Ear 83: Dozer plate 90: Fulcrum pin 91: Bracket 91a: horizontal hole 92: split type bearing 92a: pivot holder 92d: bearing recess 92e: ear section 93: Hexagon Atamazuke bolt 93a: tip threaded portion 94: Nut
２０：ボンネット ３０：前輪
３１：前輪車軸 ４０：後輪
５０：シリンダケース ６０：フロントローダ
６１：連結ブラケット ６１ａ～６１ｃ：連結ブラケットの腕部
６２：基端プレート ６２ａ～６２ｃ：ボルト連結部
６３：ローダアーム ６４：リフトシリンダ
６５：ダンプシリンダ ６６：バケット
７０：シリンダフレーム ７０ａ：立ち上がり部
７０ｂ：固定部 ７０ｃ：連結部
８０：フロントドーザ ８１：リフトシリンダ
８１ａ：シリンダ本体部 ８２：ドーザアーム
８２ａ：ドーザアームの屈曲部 ８２ｂ：ドーザアームの後半部
８２ｃ：前半部 ８２ｄ：軸受凹部
８２ｅ：耳部 ８３：ドーザプレート
９０：支点ピン ９１：ブラケット
９１ａ：横穴 ９２：割形軸受
９２ａ：支点ホルダ ９２ｄ：軸受凹部
９２ｅ：耳部 ９３：六角頭付ボルト
９３ａ：先端ネジ部 ９４：ナット 100: agricultural tractor 10: driver's seat 20: bonnet 30: front wheel 31: front wheel axle 40: rear wheel 50: cylinder case 60: front loader 61: connecting
Claims (5)
- フロントローダの基端部が、トラクタ本体側に配設された左右一対の連結ブラケットに対して着脱自在に装着されるトラクタに対するフロントドーザの取付構造において、
前記フロントドーザの左右一対のドーザアームの後端部を、前記連結ブラケットに配設された支点ピンに着脱自在かつ回動自在に装着するようにしたことを特徴とするフロントドーザの取付構造。 In a mounting structure of a front dozer for a tractor, the base end portion of the front loader is detachably mounted to a pair of left and right connecting brackets disposed on the tractor body side,
A front dozer mounting structure characterized in that rear end portions of a pair of left and right dozer arms of the front dozer are detachably and rotatably attached to fulcrum pins disposed on the connection bracket. - 前記ドーザアームの後端部が、割形軸受によって前記支点ピンの外周面に装着されることを特徴とする請求項１のフロントドーザの取付構造。 The front dozer mounting structure according to claim 1, wherein a rear end portion of the dozer arm is mounted on an outer peripheral surface of the fulcrum pin by a split bearing.
- 前記連結ブラケットが縦長に構成され、当該縦長の連結ブラケットの上端部に前記フロントローダの基端部が着脱自在に装着されると共に、前記連結ブラケットの下端部に前記支点ピンが配設されることを特徴とする請求項１のフロントドーザの取付構造。 The connection bracket is configured to be vertically long, the base end of the front loader is detachably attached to the upper end of the vertically long connection bracket, and the fulcrum pin is disposed at the lower end of the connection bracket. The front dozer mounting structure according to claim 1, characterized in that
- 前記支点ピンが、トラクタの前輪車軸の後方側であって、当該前輪車軸よりも低い位置で前記連結ブラケットに配設されることを特徴とする請求項１のフロントドーザの取付構造。 The front dozer mounting structure according to claim 1, wherein the fulcrum pin is disposed on the connection bracket at a position behind the front wheel axle of the tractor and lower than the front wheel axle.
- 前記ドーザアームの前後方向中間部に、トラクタの前輪車軸の垂直方向下方に位置する屈曲部が形成され、当該屈曲部から前記支点ピンに向かって前記ドーザアームの後半部が延びることを特徴とする請求項１のフロントドーザの取付構造。 A bent portion located below the front wheel axle of the tractor in the vertical direction is formed at a middle portion in the front-rear direction of the dozer arm, and a rear end of the dozer arm extends from the bent portion toward the fulcrum pin. 1 front dozer mounting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/032558 WO2019049329A1 (en) | 2017-09-08 | 2017-09-08 | Dozer front equipment attachment structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/032558 WO2019049329A1 (en) | 2017-09-08 | 2017-09-08 | Dozer front equipment attachment structure |
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| Publication Number | Publication Date |
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| WO2019049329A1 true WO2019049329A1 (en) | 2019-03-14 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128657U (en) * | 1981-01-30 | 1982-08-11 | ||
| JPS61146554U (en) * | 1985-03-05 | 1986-09-10 | ||
| JPH032054U (en) * | 1989-05-24 | 1991-01-10 | ||
| JP2009083525A (en) * | 2007-09-27 | 2009-04-23 | Iseki & Co Ltd | Work vehicle |
-
2017
- 2017-09-08 WO PCT/JP2017/032558 patent/WO2019049329A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128657U (en) * | 1981-01-30 | 1982-08-11 | ||
| JPS61146554U (en) * | 1985-03-05 | 1986-09-10 | ||
| JPH032054U (en) * | 1989-05-24 | 1991-01-10 | ||
| JP2009083525A (en) * | 2007-09-27 | 2009-04-23 | Iseki & Co Ltd | Work vehicle |
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