JP6459892B2

JP6459892B2 - Work vehicle

Info

Publication number: JP6459892B2
Application number: JP2015204472A
Authority: JP
Inventors: 成利石岡
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2015-10-16
Filing date: 2015-10-16
Publication date: 2019-01-30
Anticipated expiration: 2035-10-16
Also published as: JP2017074902A

Description

本発明は、耕耘装置などの作業機を後部に連結したトラクタなどの作業車両に関する。 The present invention relates to a work vehicle such as a tractor in which a work machine such as a tillage device is connected to a rear portion.

トラクタの中には、例えば特許第４１８４８９８号公報に開示されているように走行車体の前方に配置されるエンジンの上方にマフラとエアクリーナを併設した構成がある。 Some tractors have a configuration in which a muffler and an air cleaner are provided above an engine disposed in front of a traveling vehicle body as disclosed in, for example, Japanese Patent No. 4184898.

特許第４１８４８９８号公報Japanese Patent No. 4184898

しかし、上記特許文献１記載の構成であると、エアクリーナのフィルターの交換用の開閉蓋とラジエータが接近しているために、フィルターが取り出し難い欠点がある。
そこで本発明の課題は、エアクリーナや燃料タンクなどを合理的に配置してエアクリーナのフィルターの交換を容易にする構成を備えた作業車両を提供することである。 However, the configuration described in Patent Document 1 has a drawback that it is difficult to take out the filter because the open / close lid for replacing the filter of the air cleaner and the radiator are close to each other.
Accordingly, an object of the present invention is to provide a work vehicle having a configuration in which an air cleaner, a fuel tank, and the like are rationally arranged to facilitate replacement of an air cleaner filter.

上記本発明の課題は、次の技術手段により解決される。
請求項１記載の発明は、走行車体の前部のボンネット（４）内にラジエータ（８）とエンジン（７）を設け、エンジン（７）の上方にエアクリーナ（１０）を設け、エアクリーナ（１０）の前方にラジエータ（８）を設け、エアクリーナ（１０）の後方に燃料タンク（１１）を設け、エアクリーナ（１０）の前側にメンテナンス用の開閉蓋（１０ａ）を設け、エアクリーナ（１０）の後側にエンジン（７）に外気を供給する外気供給管（１３）を設け、燃料タンク（１１）の上部を前側に突出させて突出部（１１ａ）を形成し、外気供給管（１３）の上部を該突出部（１１ａ）で覆うと共に、外気供給管（１３）の後部を燃料タンク（１１）の下部に沿う姿勢に設け、ボンネット（４）を前開きに構成し、ボンネット（４）を開いたときに走行車体の側面視でボンネット（４）の下端部がエアクリーナ（１０）の開閉蓋（１０ａ）よりも上方に位置すると共にエアクリーナ（１０）の後下端部とオーバラップする構成とし、走行車体の前部にラジエータ（８）及びバッテリを載置した載置台（２４）を設け、載置台（２４）の上方を覆う前開き式のボンネット（４）を設け、載置台（２４）の上方にボンネット（４）の開閉用のロック部（２６ａ）を設け、載置台（２４）の下方に前記ロック部（２６ａ）の解除用の操作レバー（２５）を設け、ボンネット（４）のロック時には操作レバー（２５）と載置台（２４）の下面の間が離間した状態となり、ボンネット（４）のロック解除時には、前記操作レバー（２５）を載置台（２４）の下面側に接近する方向に作動させる構成とし、載置台（２４）の前方には走行車体をバランスさせるためのバランスウェイト（Ｂ）を吊り下げるための空間部（３３）を形成するバランスウェイト取付体（３０）を設け、前記空間部（３３）に隣接する部位に切欠部（３１）を形成し、該切欠部（３１）は載置台（２４）の下方に設けるものであって、該切欠部（３１）に操作レバー（２５）を設けたことを特徴とする作業車両とする。 The problems of the present invention are solved by the following technical means.
According to the first aspect of the present invention, the radiator (8) and the engine (7) are provided in the hood (4) at the front portion of the traveling vehicle body, the air cleaner (10) is provided above the engine (7), and the air cleaner (10) A radiator (8) is provided in front of the air cleaner, a fuel tank (11) is provided behind the air cleaner (10), a maintenance opening / closing lid (10a) is provided on the front side of the air cleaner (10), and a rear side of the air cleaner (10) is provided. An outside air supply pipe (13) for supplying outside air to the engine (7) is provided, and the upper part of the fuel tank (11) protrudes forward to form a protruding part (11a). The upper part of the outside air supply pipe (13) The projecting portion (11a) is covered, the rear portion of the outside air supply pipe (13) is provided in a posture along the lower portion of the fuel tank (11) , the bonnet (4) is configured to be opened forward, and the bonnet (4) is opened. Sometimes run The lower end portion of the bonnet (4) is located above the opening / closing lid (10a) of the air cleaner (10) and overlaps the rear lower end portion of the air cleaner (10) in a side view of the vehicle body. Is provided with a radiator (8) and a mounting table (24) on which a battery is mounted, a front-opening bonnet (4) covering the upper side of the mounting table (24) is provided, and a bonnet (4) above the mounting table (24). ) Is provided with an opening / closing lock portion (26a), an operation lever (25) for releasing the lock portion (26a) is provided below the mounting table (24), and an operation lever (25) is provided when the bonnet (4) is locked. ) And the lower surface of the mounting table (24) are separated from each other, and when the bonnet (4) is unlocked, the operation lever (25) is operated in a direction approaching the lower surface side of the mounting table (24). A balance weight mounting body (30) for forming a space portion (33) for suspending a balance weight (B) for balancing the traveling vehicle body is provided in front of the mounting table (24), and the space portion (33). A notch (31) is formed in a portion adjacent to the notch (31), and the notch (31) is provided below the mounting table (24). The notch (31) is provided with an operation lever (25). A working vehicle characterized by this.

請求項２記載の発明は、エアクリーナ（１０）をエンジン（７）の上方の左右一側に、左右他側にマフラ（１７）をそれぞれ設け、エンジン（７）外周部を前後に仕切る仕切板（１４）を設け、エアクリーナ（１０）の外気吸気管（１２）をエアクリーナ（１０）の直上方に設け、外気吸気管（１２）の前端をエンジン（７）の外周仕切板（１４）で支持し、外気吸気管（１２）の外気吸気口（１２ｄ）をラジエータ（８）の左右一側の上方に設け、マフラ（１７）からの排気を排出する排気管（１５）の排気口（１５ａ）をラジエータ（８）の左右他側より外側に設けることを特徴とする請求項１に記載の作業車両とする。 According to the second aspect of the present invention, the air cleaner (10) is provided on the left and right sides above the engine (7), and the muffler (17) is provided on the left and right sides, respectively, and the outer plate of the engine (7) is divided into front and rear partitions ( 14), the outside air intake pipe (12) of the air cleaner (10) is provided directly above the air cleaner (10), and the front end of the outside air intake pipe (12) is supported by the outer peripheral partition plate (14) of the engine (7). The outside air intake port (12d) of the outside air intake pipe (12) is provided above the left and right sides of the radiator (8), and the exhaust port (15a) of the exhaust pipe (15) for discharging the exhaust from the muffler (17) is provided. The work vehicle according to claim 1, wherein the work vehicle is provided outside the left and right other sides of the radiator (8).

請求項１に記載の発明によれば、燃料タンク（１１）の容量を確保しながら、エアクリーナ（１０）をボンネット（４）の内部の後方部位に配置することが可能となり、エアクリーナ（１０）とラジエータ（８）の配置位置を離すことができ、メンテナンス用のエアクリーナ（１０）の開閉蓋（１０ａ）を前側に配置しても開閉蓋（１０ａ）を開閉し易くすることができる。 According to the first aspect of the present invention, it is possible to dispose the air cleaner (10) in the rear part inside the bonnet (4) while securing the capacity of the fuel tank (11), and the air cleaner (10) The arrangement position of the radiator (8) can be separated, and the opening / closing lid (10a) can be easily opened / closed even if the opening / closing lid (10a) of the maintenance air cleaner (10) is arranged on the front side.

請求項１に記載の発明によれば、ボンネット（４）の開放時にボンネット（４）の側面がエアクリーナ（１０）の開閉蓋（１０ａ）にオーバラップしないので、開閉蓋（１０ａ）の開閉操作をし易くすることができる。また、エアクリーナ（１０）の後下端部をボンネット（４）の下端部とオーバラップする位置まで後方に設けることで、ラジエータ（８）と、エアクリーナ（１０）の開閉蓋（１０ａ）との距離を長くすることができ、開閉蓋（１０ａ）の開閉操作がし易い。
また、請求項１に記載の発明によれば、ロックを解除してボンネット（４）を開放させるときには、操作レバー（２５）を下側から上側に動かすので、ロック解除時のボンネット（４）の開放動作がし易い。さらに、請求項１に記載の発明によれば、バランスウエイト（Ｂ）を吊り下げ用の空間部（３３）に吊り下げ可能な構造を利用して、オペレータは切欠部（３１）に手を入れ、操作レバー（２５）を操作することができる。 According to the invention of claim 1, the side surface of the hood (4) upon opening of the bonnet (4) does not overlap the lid of the air cleaner (10) (10a), the opening and closing operation of the lid (10a) Can be made easier. Further, by providing the rear lower end of the air cleaner (10) to a position overlapping the lower end of the bonnet (4), the distance between the radiator (8) and the open / close lid (10a) of the air cleaner (10) can be increased. The opening / closing lid (10a) can be opened and closed easily.
According to the first aspect of the present invention, when releasing the lock and opening the bonnet (4), the operating lever (25) is moved from the lower side to the upper side. Easy to open. Further, according to the invention described in claim 1, the operator puts his hand into the notch (31) by using a structure capable of suspending the balance weight (B) in the suspension space (33). The operation lever (25) can be operated.

請求項２に記載の発明によれば、請求項１に記載の発明の効果に加えて、外気吸気口（１２ｄ）と排気口（１５ａ）とを離れた位置に配置することで、エンジン排気が外気吸気管（１２）に吸引され難い。 According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the engine exhaust is reduced by disposing the outside air intake port (12d) and the exhaust port (15a) at positions separated from each other. It is difficult to be sucked into the outside air intake pipe (12).

側面から見たトラクタを示す図Figure showing the tractor from the side ボンネット内部を示す斜視図Perspective view showing inside of bonnet 側面から見たボンネットの内部を示す図The figure which shows the inside of the bonnet seen from the side 側面から見たボンネットの内部を示す図The figure which shows the inside of the bonnet seen from the side 平面から見たボンネットの内部を示す図The figure which shows the inside of the bonnet seen from the plane 正面から見たボンネットの内部を示す図The figure which shows the inside of the bonnet seen from the front 側面から見たボンネットの開放状態を示す図The figure which shows the open state of the bonnet seen from the side ボンネットの開放状態を示す斜視図The perspective view which shows the open state of a bonnet （Ａ）ボンネットを閉鎖した時の開閉機構の状態を示す図（Ｂ）ボンネットを開放するときの開閉動作の状態を示す図(A) The figure which shows the state of the opening-and-closing mechanism when a bonnet is closed (B) The figure which shows the state of the opening-and-closing operation when opening a bonnet 正面から見たバランスウエイト取付体と開閉機構の位置関係を示す図The figure which shows the positional relationship of the balance weight attachment body and the opening and closing mechanism seen from the front バランスウエイト取付体と開閉機構を示す斜視図Perspective view showing balance weight attachment body and opening / closing mechanism 開放した状態のボンネットの内部を示す斜視図The perspective view which shows the inside of the bonnet of the open state 開放した状態のボンネットの内部を示す斜視図The perspective view which shows the inside of the bonnet of the open state ボンネット支持体を示す側面図Side view showing bonnet support ボンネット支持体を示す斜視図Perspective view showing bonnet support 燃料タンク及びステアリングを示す斜視図Perspective view showing fuel tank and steering

本発明を実施するための最良の形態を説明する。
以下の説明では、前後方向とは、トラクタ１が直進する際の進行方向であり、進行方向前方側を前後方向前側、後方側を前後方向後側という。また、左右方向とは、トラクタ１の車幅方向を指す。 The best mode for carrying out the present invention will be described.
In the following description, the front-rear direction is a traveling direction when the tractor 1 goes straight, and the front side in the traveling direction is referred to as the front side in the front-rear direction and the rear side is referred to as the rear side in the front-rear direction. The left-right direction refers to the vehicle width direction of the tractor 1.

トラクタ１は、走行車体に前輪２及び後輪３を備え、前部にボンネット４を備え、ボンネット４後方にはステアリングハンドル５及び座席６を備える。
ボンネット４内部には、エンジン７、ラジエータ８、バッテリケース９、エアクリーナ１０、マフラ１７、燃料タンク１１等を備える。 The tractor 1 includes a front wheel 2 and a rear wheel 3 on a traveling vehicle body, a bonnet 4 at a front portion, and a steering handle 5 and a seat 6 behind the bonnet 4.
Inside the bonnet 4 are provided an engine 7, a radiator 8, a battery case 9, an air cleaner 10, a muffler 17, a fuel tank 11, and the like.

ボンネット４内部の前部には、バッテリケース９が載置台２４に載置されている。バッテリケース９の後方にはラジエータ８を備え、ラジエータ８の後方には、仕切板１４を設け、エンジン７の上方の空間とラジエータ８の上方の空間を仕切っている。エンジン７の上方にはマフラ１７とエアクリーナ１０を左右方向に並設する。マフラ１７とエアクリーナ１０の後方には燃料タンク１１を備えている。 A battery case 9 is mounted on the mounting table 24 at the front portion inside the bonnet 4. A radiator 8 is provided behind the battery case 9, and a partition plate 14 is provided behind the radiator 8 to partition the space above the engine 7 and the space above the radiator 8. A muffler 17 and an air cleaner 10 are juxtaposed in the left-right direction above the engine 7. A fuel tank 11 is provided behind the muffler 17 and the air cleaner 10.

エアクリーナ１０は前部にエアクリーナ１０内のフィルタ（図示せず）のメンテナンス用の開閉蓋１０ａを設け、後部に外気を吸引する外気吸引管１２とエンジン７に外気を供給する外気供給管１３を設ける。外気吸引管１２の前部１２ａは仕切板１４を貫通し、仕切板１４より前側位置、かつラジエータ８の上方位置に外気吸引口１２ｄを設ける。外気吸引管１２の途中部１２ｂは前後方向に直線状に延びてエアクリーナ１０の直上方を通過し、外気吸引管１２の後部１２ｃは下方に屈曲してエアクリーナ１０の上面に接続する。また、エアクリーナ１０は後下がり傾斜姿勢に設け、エアクリーナ１０内に水分が滞留し難くしている。 The air cleaner 10 is provided with an opening / closing lid 10a for maintenance of a filter (not shown) in the air cleaner 10 at the front, and an outside air suction pipe 12 for sucking outside air and an outside air supply pipe 13 for supplying outside air to the engine 7 at the rear. . A front portion 12 a of the outside air suction pipe 12 penetrates the partition plate 14, and an outside air suction port 12 d is provided at a position in front of the partition plate 14 and at a position above the radiator 8. A midway portion 12 b of the outside air suction pipe 12 extends linearly in the front-rear direction and passes directly above the air cleaner 10, and a rear portion 12 c of the outside air suction pipe 12 is bent downward and connected to the upper surface of the air cleaner 10. In addition, the air cleaner 10 is provided in a rearwardly inclined posture so that moisture does not easily stay in the air cleaner 10.

外気供給管１３の一端はエアクリーナ１０の後面に接続され、その途中部を下方に屈曲する屈曲部１３ａを形成し、他端をエンジン７に接続する。
マフラ１７は、その下部に排気管１５の一端を接続する。排気管１５はエンジン７の左右外側方を通過しながら前下がり傾斜姿勢で延びる構成とし、排気口１５ａはボンネット４の下方を通過してボンネット４より左右外側に設ける。 One end of the outside air supply pipe 13 is connected to the rear surface of the air cleaner 10, a bent part 13 a that bends the middle part downward is formed, and the other end is connected to the engine 7.
The muffler 17 has one end of the exhaust pipe 15 connected to the lower part thereof. The exhaust pipe 15 is configured to extend in a downwardly inclined posture while passing the left and right outer sides of the engine 7, and the exhaust port 15 a is provided below the bonnet 4 and on the left and right outer sides of the bonnet 4.

すなわち、外気吸引口１２ａはラジエータ８の左右一側上方に位置し、排気口１５ａはラジエータ８の左右他側の外側方に設ける。
燃料タンク１１は正面視で門構えに形成する燃料タンク支持ステー１６で支持され、燃料タンク１１の前側は燃料タンク支持ステー１６より前方に突出し、燃料タンク１１の後部は燃料タンク支持ステー１６より後方に突出する構成である。そして、燃料タンク１１の前側がボンネット４に覆われている構成である。燃料タンク１１の左右幅は、エアクリーナ１０の後方及びマフラ１７の後方に跨って設けられている。 That is, the outside air suction port 12 a is located on the left and right sides of the radiator 8, and the exhaust port 15 a is provided on the outer side of the left and right sides of the radiator 8.
The fuel tank 11 is supported by a fuel tank support stay 16 formed in a gate structure in front view, the front side of the fuel tank 11 projects forward from the fuel tank support stay 16, and the rear portion of the fuel tank 11 is rearward from the fuel tank support stay 16. It is the structure which protrudes. The front side of the fuel tank 11 is covered with the bonnet 4. The left and right widths of the fuel tank 11 are provided across the rear of the air cleaner 10 and the rear of the muffler 17.

燃料タンク１１の前側の上部に、その前側の下部よりも前方に突出する突出部１１ａを形成する。突出部１１ａは、エアクリーナ１０の後方側に形成されており、マフラ１７の後部の一部が側面視で突出部１１ａとオーバラップする構成である。 A protrusion 11a is formed on the front upper portion of the fuel tank 11 so as to protrude forward from the front lower portion. The protrusion 11a is formed on the rear side of the air cleaner 10, and a part of the rear portion of the muffler 17 overlaps the protrusion 11a in a side view.

突出部１１ａの下面は外気供給管１３の上面と対向する位置にあると共に、突出部１１ａの前面は外気吸引管１２の後部と対向する構成である。外気供給管１３の屈曲部１３ａは燃料タンク１１の前側の下部に沿う姿勢に設けている。言い換えれば、燃料タンク１１の前側の下部は、その上部に対して窪み部（凹部）１１ｂを形成している。
突出部１１ａの上面には、燃料を供給するための燃料供給蓋１８を取り付けている。 The lower surface of the protruding portion 11 a is in a position facing the upper surface of the outside air supply pipe 13, and the front surface of the protruding portion 11 a is configured to face the rear portion of the outside air suction pipe 12. The bent portion 13 a of the outside air supply pipe 13 is provided in a posture along the front lower portion of the fuel tank 11. In other words, the lower part on the front side of the fuel tank 11 forms a recessed part (recessed part) 11b with respect to the upper part.
A fuel supply lid 18 for supplying fuel is attached to the upper surface of the protruding portion 11a.

燃料タンク１１の突出部１１ａにより、燃料タンク１１の容量を増加させると共に、燃料タンク１１の窪み部１１ｂにより形成された突出部１１ａの下方のスペースを利用して、エアクリーナ１０の外気供給管１３を収容し、その分エアクリーナ１０全体をボンネット４内部の後方に位置させることで、エアクリーナ１０の開閉蓋１０ａとラジエータ８の距離を長くすることが可能となり、開閉蓋１０ａの開閉操作をし易くすることができる。 The protruding portion 11a of the fuel tank 11 increases the capacity of the fuel tank 11, and the outside air supply pipe 13 of the air cleaner 10 is connected to the space below the protruding portion 11a formed by the recessed portion 11b of the fuel tank 11. It is possible to extend the distance between the opening / closing lid 10a of the air cleaner 10 and the radiator 8 by making the entire air cleaner 10 located behind the bonnet 4 and to facilitate the opening / closing operation of the opening / closing lid 10a. Can do.

また、燃料供給蓋１８を極力前側に設けることが可能となり、燃料を供給する際に、燃料が毀れた時に、ステアリングハンドル５側にかかり難くすることができる。
ボンネット４は、その後端部を支点とし、横軸芯で前開きの構成とし、ダンパ２０により、開放動作を補助すると共に、開放した時の姿勢を保持する。 In addition, the fuel supply lid 18 can be provided on the front side as much as possible, so that when the fuel is drowned when the fuel is supplied, the fuel supply lid 18 can be hardly applied to the steering handle 5 side.
The bonnet 4 has a rear end portion as a fulcrum and a front-open configuration with a horizontal axis. The hood 4 assists the opening operation by the damper 20 and maintains the posture when opened.

ダンパ２０の基端部２０ａを燃料タンク１１の突出部１１ａの前面に連結し、ダンパ２０の先端部２０ｂをボンネット支持ステー２１の先端部２１ｂに連結し、ボンネット支持ステー２１の基端部２１ａは燃料タンク１１の上面に連結する。ダンパ２０の先端部２０ｂとボンネット支持ステー２１の先端部２１ｂはボンネット４の内面側に連結するボンネット連結部２２となる。また、ボンネット支持ステー２１はボンネット４の下面に沿って取り付け、ボンネット４の補強部材を兼ねることもできる。 The base end portion 20a of the damper 20 is connected to the front surface of the protruding portion 11a of the fuel tank 11, the tip end portion 20b of the damper 20 is connected to the tip end portion 21b of the bonnet support stay 21, and the base end portion 21a of the bonnet support stay 21 is It is connected to the upper surface of the fuel tank 11. The front end portion 20 b of the damper 20 and the front end portion 21 b of the bonnet support stay 21 form a bonnet connecting portion 22 that is connected to the inner surface side of the bonnet 4. Further, the bonnet support stay 21 can be attached along the lower surface of the bonnet 4 and can also serve as a reinforcing member for the bonnet 4.

ダンパ２０の基端部２０ａとボンネット支持ステー２１の基端部２１ａはそれぞれ横軸芯で回動可能に構成する。また、ダンパ２０の先端部２０ｂもボンネット支持ステー２１に対し横軸芯に回動可能に構成する。なお、ボンネット支持ステー２１を第一のボンネット支持部材と呼び、ダンパ２０を第二のボンネット支持部材と呼ぶこともできる。 The base end portion 20a of the damper 20 and the base end portion 21a of the bonnet support stay 21 are configured to be rotatable about a horizontal axis. Further, the tip 20 b of the damper 20 is also configured to be rotatable about a horizontal axis with respect to the bonnet support stay 21. In addition, the bonnet support stay 21 can also be called a 1st bonnet support member, and the damper 20 can also be called a 2nd bonnet support member.

ボンネット４が閉じている時には、図１４に示すようにダンパ２０が初期位置であると共に、ボンネット支持ステー２１が前後方向に略水平姿勢又は緩傾斜の状態である。ボンネット４が開くとダンパ２０が伸長すると共に前上がり姿勢（急傾斜姿勢）に上昇し、ボンネット支持ステー２１もまた前上がり姿勢に上昇する姿勢となる。 When the bonnet 4 is closed, as shown in FIG. 14, the damper 20 is in the initial position, and the bonnet support stay 21 is in a substantially horizontal posture or a gently inclined state in the front-rear direction. When the bonnet 4 is opened, the damper 20 extends and rises to the front rising posture (steeply inclined posture), and the bonnet support stay 21 also rises to the front rising posture.

ボンネット４が開放姿勢となると、ボンネット４の側面の下端縁４ａが前上がり傾斜となる。この時、ボンネット４の下端縁４ａは側面視でエアクリーナ１０の側方を斜め交差する姿勢となり、エアクリーナ１０の後部はボンネット４とオーバラップし、エアクリーナの前部はボンネット４とオーバラップしない。すなわち、開閉蓋１０ａはボンネット４の側面視で露出状態となることで、オペレータは開閉蓋１０ａの着脱をし易くすることができる。 When the bonnet 4 is in the open posture, the lower end edge 4a on the side surface of the bonnet 4 is inclined upward. At this time, the lower end edge 4 a of the bonnet 4 is in a posture that obliquely intersects the side of the air cleaner 10 in a side view, the rear portion of the air cleaner 10 overlaps with the bonnet 4, and the front portion of the air cleaner does not overlap with the bonnet 4. That is, the opening / closing lid 10a is exposed when the bonnet 4 is viewed from the side, so that the operator can easily attach and detach the opening / closing lid 10a.

従来、ダンパがエンジンの上方を前側から後側に向かって上がり傾斜に構成するタイプが多かったが、本実施の形態により、エンジン７の上方のスペースが増加し、エンジン７等のメンテナンススペースを確保できる。 Conventionally, there are many types in which the damper is configured so that the upper part of the engine is inclined upward from the front side toward the rear side. However, this embodiment increases the space above the engine 7 and secures the maintenance space for the engine 7 and the like. it can.

また、ダンパ２０及びボンネット支持ステー２１それぞれの基端部を燃料タンク１１に取り付けるため、トラクタ１の組み立て時に後付けでも組み付け易く、また、ボンネット４の開き姿勢が安定する。 Further, since the base end portions of the damper 20 and the bonnet support stay 21 are attached to the fuel tank 11, it is easy to assemble the tractor 1 even when it is retrofitted, and the bonnet 4 is opened stably.

また、ボンネット４が開放時にダンパ２０が伸長するときに、ダンパ２０の傾斜角度が大きくなることで、ダンパ２０の伸長時の姿勢を良好にすることができる。
次に、ボンネット４の開閉機構Ｋについて説明する。 Further, when the damper 20 is extended when the bonnet 4 is opened, the inclination angle of the damper 20 is increased, so that the posture of the damper 20 when extended can be improved.
Next, the opening / closing mechanism K of the bonnet 4 will be described.

載置台２４の前端部にはボンネット４の開閉機構Ｋを設ける。ボンネット４の開閉機構Ｋは、オペレータがボンネット４を開くときに操作する操作レバー部２５と、操作レバー部２５の操作に伴って動作する可動部材２６と、固定部材２７を備えている。操作レバー部２５は、載置台２４の下面から下方に離間する位置にあり、可動部材２６と固定部材２７は載置台２４上に支持されると共に、載置台２４より上方に突出する構成である。 An opening / closing mechanism K for the bonnet 4 is provided at the front end of the mounting table 24. The opening / closing mechanism K of the bonnet 4 includes an operation lever portion 25 that is operated when the operator opens the bonnet 4, a movable member 26 that operates in accordance with the operation of the operation lever portion 25, and a fixed member 27. The operation lever portion 25 is located at a position spaced downward from the lower surface of the mounting table 24, and the movable member 26 and the fixed member 27 are supported on the mounting table 24 and protrude upward from the mounting table 24.

操作レバー部２５の一端を載置台２４の下面より下方に離間する位置に設け、他端を可動部材２６の一端側に連結する。操作レバー部２５及び可動部材２６は前後軸心の軸２８に沿って回動可能に構成し、操作レバー部２５の一端を載置台２４の下面側に接近させる側に回動させると、可動部材２６の上部は固定部材２７から離間する側に回動する。操作レバー部２５にはスプリング２９を取り付けており、スプリング２９は操作レバー部２５を載置台２４から離れる側に付勢する構成である。 One end of the operating lever portion 25 is provided at a position spaced downward from the lower surface of the mounting table 24, and the other end is connected to one end side of the movable member 26. The operation lever portion 25 and the movable member 26 are configured to be rotatable along the axis 28 of the longitudinal axis, and when one end of the operation lever portion 25 is rotated to the side closer to the lower surface side of the mounting table 24, the movable member. The upper part of 26 rotates to the side away from the fixing member 27. A spring 29 is attached to the operation lever portion 25, and the spring 29 is configured to bias the operation lever portion 25 to the side away from the mounting table 24.

載置台２４の前方から下方に跨ってバランスウエイト取付体３０を設けており、バランスウエイト取付体３０の後部には有底の切欠部３１を形成し、前部にはバランスウエイトＢをひっかけるための貫通孔３３を形成している。切欠部３１の内部に操作レバー部２５及びスプリング２９を設けている。 A balance weight mounting body 30 is provided from the front to the bottom of the mounting table 24, a bottomed cutout 31 is formed at the rear of the balance weight mounting body 30, and the balance weight B is hooked at the front. A through hole 33 is formed. An operation lever portion 25 and a spring 29 are provided inside the notch portion 31.

ボンネット４が閉じている時には、ボンネット４側に取り付けるピン３２を可動部材２６の上部のロック部２６ａで位置固定する。ボンネット４を開くときにはオペレータが貫通孔３３の上側から手を挿入し、操作レバー部２５を上方に向かって操作し、操作レバー部２５を載置台２４の下面側に向けて回動させると、可動部材２６のロック部２６ａがピン３２及び固定部材２７から離れる側に回動され、ロックが解除される。その状態でオペレータがボンネット４を把持して持ち上げるとピン３２が開閉機構Ｋから上方に離間すると共に、ボンネット４が上方に開く構成である。 When the bonnet 4 is closed, the pin 32 attached to the bonnet 4 side is fixed in position by the lock portion 26 a at the upper part of the movable member 26. When opening the bonnet 4, an operator inserts a hand from the upper side of the through-hole 33, operates the operation lever portion 25 upward, and rotates the operation lever portion 25 toward the lower surface side of the mounting table 24. The lock part 26a of the member 26 is rotated to the side away from the pin 32 and the fixing member 27, and the lock is released. When the operator grasps and lifts the bonnet 4 in this state, the pin 32 is separated upward from the opening / closing mechanism K and the bonnet 4 is opened upward.

ボンネット４を閉じるときには、オペレータがボンネット４を押し下げるとピン３２が可動部材２６のロック部２６ａを通過し、可動部材２６のロック部２６ａにより位置固定され、ボンネット４が閉状態となる。 When closing the bonnet 4, when the operator depresses the bonnet 4, the pin 32 passes through the lock portion 26 a of the movable member 26, the position is fixed by the lock portion 26 a of the movable member 26, and the bonnet 4 is closed.

従来のボンネットの開閉機構Ｋは、ボンネット４の前側に露出する操作レバーを引っ張ることでロックを解除してボンネット４の開放を可能にする構成であった。本実施の開閉機構Ｋの形態により、操作レバー部２５を上側に操作するのでロック解除時のボンネット４の持ち上げ操作がし易い。 The conventional bonnet opening / closing mechanism K has a configuration in which the bonnet 4 can be opened by releasing the lock by pulling the operation lever exposed to the front side of the bonnet 4. According to the form of the opening / closing mechanism K of the present embodiment, the operation lever portion 25 is operated upward, so that the bonnet 4 can be easily lifted when the lock is released.

また、バランスウエイトＢを引っ掛ける貫通孔３３を利用して手を入れる構成のため、操作がし易い。また、操作レバー部２５がバランスウエイト取付体３０内に設けられているため、トラクタ１の外部からものが操作レバー部２５に引っ掛かったりしないため安全である。また、ボンネット４の開放時にスプリング２９が露出するので、スプリング２９の交換がし易い。また、スプリング２９及び操作レバー部２５の下方は有底のため、圃場からの泥が付着しにくい。また、操作レバー部２５は左右方向に延びる構成となるため、機外に飛散する塵埃がボンネット４の内部に入り込む量を、操作レバー部２５で遮ることで、低減することができる。 In addition, since the structure is put in using the through hole 33 for hooking the balance weight B, the operation is easy. Moreover, since the operation lever part 25 is provided in the balance weight attachment body 30, since the thing is not caught on the operation lever part 25 from the exterior of the tractor 1, it is safe. Further, since the spring 29 is exposed when the bonnet 4 is opened, the spring 29 can be easily replaced. Moreover, since the bottom of the spring 29 and the operation lever part 25 has a bottom, mud from an agricultural field does not adhere easily. Moreover, since the operation lever part 25 becomes a structure extended in the left-right direction, it can reduce by blocking | blocking the quantity which the dust which spreads out of the machine enters the inside of the bonnet 4 with the operation lever part 25. FIG.

４ボンネット
７エンジン
８ラジエータ
１０エアクリーナ
１０ａ開閉蓋
１１燃料タンク
１１ａ突出部
１２外気吸気管
１２ｄ外気吸気口
１３外気供給管
１４仕切板
１５排気管
１５ａ排気口
１７マフラ
２０ダンパ（第二のボンネット支持体）
２１ボンネット支持ステー（第一のボンネット支持体）
２４載置台
２５操作レバー（操作レバー部）
２６可動部材
２６ａロック部
２７固定部材
２８軸
２９スプリング
３０バランスウエイト取付体
３１切欠部
３２ピン
３３空間部（貫通孔）
Ｋ開閉機構
Ｂバランスウエイト
4 Bonnet 7 Engine 8 Radiator 10 Air cleaner 10a Open / close lid
11 Fuel tank 11a Protruding portion 12 Outside air intake pipe 12d Outside air intake port 13 Outside air supply pipe 14 Partition plate 15 Exhaust pipe 15a Exhaust port 17 Muffler 20 Damper (second bonnet support)
21 Bonnet support stay (first bonnet support)
24 Mounting table 25 Operation lever (operation lever part)
26 Movable member 26a Lock portion 27 Fixed member 28 Shaft 29 Spring 30 Balance weight attachment body 31 Notch portion 32 Pin 33 Space portion (through hole)
K Opening / closing mechanism B Balance weight

Claims

A radiator (8) and an engine (7) are provided in the hood (4) at the front of the traveling vehicle body, and an air cleaner (10) is provided above the engine (7).
A radiator (8) is provided in front of the air cleaner (10), a fuel tank (11) is provided in the rear of the air cleaner (10),
An open / close lid (10a) for maintenance is provided on the front side of the air cleaner (10),
An outside air supply pipe (13) for supplying outside air to the engine (7) is provided on the rear side of the air cleaner (10),
Forming a protrusion (11a) that protrudes the upper part of the fuel tank (11) forward;
The upper part of the outside air supply pipe (13) is covered with the protrusion (11a), and the rear part of the outside air supply pipe (13) is provided in a posture along the lower part of the fuel tank (11) .
The bonnet (4) is configured as a front opening, and when the bonnet (4) is opened, the lower end of the bonnet (4) is positioned above the opening / closing lid (10a) of the air cleaner (10) in a side view of the traveling vehicle body. And an air cleaner (10) that overlaps with the rear lower end of the air cleaner (10),
A mounting table (24) on which a radiator (8) and a battery are mounted is provided at the front of the traveling vehicle body,
A front opening type bonnet (4) covering the upper side of the mounting table (24) is provided,
A lock part (26a) for opening and closing the bonnet (4) is provided above the mounting table (24),
An operating lever (25) for releasing the lock portion (26a) is provided below the mounting table (24),
When the bonnet (4) is locked, the operation lever (25) and the lower surface of the mounting table (24) are separated from each other. When the bonnet (4) is unlocked, the operation lever (25) is moved to the mounting table (24). It is configured to operate in the direction approaching the lower surface side,
Provided in front of the mounting table (24) is a balance weight mounting body (30) that forms a space (33) for suspending a balance weight (B) for balancing the traveling vehicle body,
A notch (31) is formed in a portion adjacent to the space (33), and the notch (31) is provided below the mounting table (24),
A work vehicle characterized in that an operating lever (25) is provided in the notch (31) .

The air cleaner (10) is provided on the left and right sides above the engine (7), and the muffler (17) is provided on the other left and right sides.
A partition plate (14) for partitioning the outer periphery of the engine (7) back and forth,
An outside air intake pipe (12) of the air cleaner (10) is provided directly above the air cleaner (10),
The front end of the outside air intake pipe (12) is supported by the outer peripheral partition plate (14) of the engine (7),
An outside air inlet (12d) of the outside air intake pipe (12) is provided above the left and right sides of the radiator (8),
The work vehicle according to claim 1, wherein an exhaust port (15a) of an exhaust pipe (15) for exhausting exhaust from the muffler (17) is provided outside the other left and right sides of the radiator (8).