JPH0714050Y2 - Passenger farm work vehicle - Google Patents
Passenger farm work vehicleInfo
- Publication number
- JPH0714050Y2 JPH0714050Y2 JP3131389U JP3131389U JPH0714050Y2 JP H0714050 Y2 JPH0714050 Y2 JP H0714050Y2 JP 3131389 U JP3131389 U JP 3131389U JP 3131389 U JP3131389 U JP 3131389U JP H0714050 Y2 JPH0714050 Y2 JP H0714050Y2
- Authority
- JP
- Japan
- Prior art keywords
- continuously variable
- oil
- hydraulic continuously
- hst
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Motor Power Transmission Devices (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、油圧式無段変速装置を備えた乗用型農作業車
に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a riding-type agricultural work vehicle provided with a hydraulic continuously variable transmission.
従来、乗用型農作業車では、後輪駆動用の油圧式無断変
速装置(以下、HSTと略称する)へ油補充を行うため
に、特開昭63−235760号公報に開示されたもののよう
に、チャージポンプが設けられていた。Conventionally, in a passenger farm vehicle, in order to replenish oil to a rear wheel drive hydraulic continuously variable transmission (hereinafter, abbreviated as HST), as disclosed in JP-A-63-235760, There was a charge pump.
しかしながら、上記従来構造では、HSTのケース内に油
圧ポンプや油圧モータとともにチャージポンプも内装す
るようにしているから、HSTの内部構造が複雑で、高価
なものとなっていた。又、一般に、そのHSTの冷却はHST
ケースに対する冷却ファンの送風で行うようにしている
から、ケースを介した上で作動油等を冷却することにな
り、効果的な冷却を得るには冷却ファン等の冷却能力を
大としなければならないという欠点があった。However, in the above-mentioned conventional structure, since the hydraulic pump and the hydraulic motor as well as the charge pump are internally provided in the case of the HST, the internal structure of the HST is complicated and expensive. Generally, the HST is cooled by HST.
Since the cooling fan blows air to the case, the working oil and the like must be cooled after passing through the case. To obtain effective cooling, the cooling capacity of the cooling fan must be large. There was a drawback.
本考案は、上記の点を鑑みてなされたものであって、HS
T用のリーク油還元構造を安価に構成するとともに、そ
の還元構造の合理的配置によってHSTを効果的に冷却で
きるようにした乗用型農作業車を提供することも目的と
する。The present invention has been made in view of the above points, and
It is also an object of the present invention to provide a passenger farm work vehicle in which a leak oil reducing structure for T is constructed at a low cost, and the HST can be effectively cooled by rationally arranging the reducing structure.
本考案にかかる乗用型農作業車は、上記目的を達成する
ために、前部に冷却ファンを備えた油圧式無段変速装置
を、機体後部に配設するとともに、燃料タンクを、その
下面と前記油圧式無段変速装置との間に前記冷却ファン
からの冷却風を後方へ案内する風路を形成した状態で前
記油圧式無段変速装置の上方に配設して、かつ、自然流
下で前記油圧式無段変速装置へ油補充を行うとともに該
変速装置からのリーク油の循環回収を行うオイルタンク
を、前記風路の後方がわに設けてあることを特徴構成と
する。In order to achieve the above object, a riding type agricultural work vehicle according to the present invention is provided with a hydraulic continuously variable transmission equipped with a cooling fan in the front part, at the rear part of the machine body, a fuel tank, a lower surface thereof and It is arranged above the hydraulic continuously variable transmission with an air path for guiding the cooling air from the cooling fan backward formed between the hydraulic continuously variable transmission and the natural continuous flow. An oil tank for supplying oil to the hydraulic continuously variable transmission and circulatingly collecting leaked oil from the transmission is provided at the rear of the air passageway.
かかる特徴構成による作用・効果は、以下の通りであ
る。The operation and effect of this characteristic configuration are as follows.
自然流下で油圧式無段変速装置へ油補充を行うとともに
該変速装置からのリーク油の循環回収を行うオイルタン
クを、該変速装置と燃料タンクとの間に形成した冷却風
の風路の後方がわに設けてあるから、従来のようにチャ
ージポンプを設けるものでなく、油圧式無段変速装置は
簡素な構成となる。An oil tank that replenishes oil to the hydraulic continuously variable transmission under natural flow and circulates and collects leakage oil from the transmission is provided behind the cooling air passage formed between the transmission and the fuel tank. Since it is provided in the gantry, a charge pump is not provided unlike the conventional case, and the hydraulic continuously variable transmission has a simple structure.
また、オイルタンクは冷却風を直接受けることになるの
で、その補充用の作動油は、油圧式無段変速装置と別に
冷却されることになる。Further, since the oil tank receives the cooling air directly, the replenishing hydraulic oil is cooled separately from the hydraulic continuously variable transmission.
かかる作用により、安価なオイルタンクを利用し、かつ
油圧式無段変速装置の構造も簡単にすることで、全体的
にコスト低下をもたらす。さらに、補充用の作動油を油
圧式無段変速装置と別に冷却することで、効果的な冷却
が行なえ、冷却ファンも比較的小さくできる等の効果を
奏する。With such an effect, an inexpensive oil tank is used and the structure of the hydraulic continuously variable transmission is simplified, so that the cost is reduced as a whole. Further, by cooling the replenishing hydraulic oil separately from the hydraulic continuously variable transmission, effective cooling can be performed and the cooling fan can be made relatively small.
以下に、本考案の実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第5図に、乗用型農作業車の一例としての乗用型芝刈機
を示している。この芝刈機は、左右一対の前車輪(1)
及び後車輪(2)を夫々軸架した機体に搭乗運転部
(3)を装備するとともに、機体の前部にエンジン
(4)を搭載し、このエンジン(4)からの出力を伝動
軸(5)を課強いて入力される後車輪駆動用の油圧式無
段変速装置(6)(以下、HSTと略称する)を機体後部
で、搭乗運転部(3)の座席(7)を設けたフェンダー
(8)内に配設してあり、機体下部にはモーア(9)を
前後車輪(1),(2)の間に配置した状態で昇降自在
に装備してある。FIG. 5 shows a riding lawn mower as an example of a riding farm work vehicle. This lawnmower has a pair of left and right front wheels (1)
Further, the boarding operation unit (3) is mounted on the machine body on which the rear wheels (2) are respectively mounted, and the engine (4) is mounted on the front part of the machine body, and the output from the engine (4) is transmitted to the transmission shaft (5). ), A hydraulic continuously variable transmission (6) for driving rear wheels (hereinafter abbreviated as HST) is provided at the rear of the fuselage, and a fender (seat) for the boarding operation section (3) is provided ( 8), and a mower (9) is provided at the lower part of the machine body so as to be able to move up and down while being arranged between the front and rear wheels (1), (2).
HST(6)を配設した機体後部の構造について詳述す
る。The structure of the rear part of the fuselage provided with the HST (6) will be described in detail.
まず、フレーム構造について説明すると、第1図、第3
図、及び第4図に示すように、機体のメインフレームを
なす左右一対のパイプフレーム(10),(10)を、フェ
ンダー(8)内に前後方向に沿って配設してあり、その
パイプフレーム(10),(10)の後端がわ下部に垂下す
る状態で箱状の側壁フレーム(11),(11)を溶接して
取付けてある。First, the frame structure will be described with reference to FIGS.
As shown in FIG. 4 and FIG. 4, a pair of left and right pipe frames (10) and (10) forming the main frame of the airframe are arranged in the fender (8) along the front-rear direction. Box-shaped side wall frames (11) and (11) are attached by welding in a state where the rear ends of the frames (10) and (10) hang down to the lower part of the frame.
HST(6)は、その下部で後車輪(2)用の車軸ケース
(12)と一体に構成してあり、この車軸ケース(12)の
両側部に形成されたボス部(13),(13)を介して、前
記側壁ケース(11),(11)の下端にボルト固定してフ
レーム構造に剛性をもたらすようにしてある。そして、
前方に突設したHST(6)の入力軸(14)に、エンジン
(4)からの伝動軸(5)に連結したユニバーサルジョ
イント(15)のボス部(16)が嵌合され、図示しないキ
ーで前記入力軸(14)とボス部(16)とを固着連結する
とともに、ボス部(16)外周のフランジに冷却ファン
(18)をボルト連結してある。The HST (6) is formed integrally with the axle case (12) for the rear wheel (2) at the lower part thereof, and the boss portions (13), (13) formed on both sides of the axle case (12). ), The side wall cases (11) and (11) are bolted to the lower ends of the side wall cases (11) and (11) to provide rigidity to the frame structure. And
The boss (16) of the universal joint (15) connected to the transmission shaft (5) from the engine (4) is fitted to the input shaft (14) of the HST (6) projecting forward, and a key not shown is shown. The input shaft (14) and the boss (16) are fixedly connected to each other, and the cooling fan (18) is connected to the flange on the outer periphery of the boss (16) by bolts.
そして、HST(6)の後方がわにおいて、バッテリー(1
9)が、前記両側壁フレーム(11),(11)の下端間に
架設した支持板(20)に載置されているとともに、支持
板(20)に形成した折曲げ部(21),(22),(23)で
そのバッテリー(19)の前方、及び左右両側方での位置
保持がなされている。また、このバッテリー(19)の後
方がわには、バッテリー(19)の上下及び後方に対する
位置保持を行うリアカバー(24)が設置されている。す
なわち、リアカバー(24)は、上部に形成したL字部
(25)でバッテリー(19)上部を押さえるように、前記
支持板(20)後部のヒッチ取付用ブラケット(26)に差
し込まれた状態で、その両側を前記側壁フレーム(1
1),(11)の後面にノブ付ボルト(27),(27)で固
定して設けられている。尚、リアカバー(24)の上端
と、フェンダー(8)後端との間には隙間を設けて、後
述するように冷却ファン(18)からの冷却風が外部へ通
り抜け得るように、またオイルタンク(28)を機体外部
から確認できるようにしてある。Then, at the rear of the HST (6), the battery (1
9) is placed on a support plate (20) installed between the lower ends of the side wall frames (11), (11), and bent portions (21), () formed on the support plate (20). 22) and (23) hold the position of the battery (19) at the front and both sides. A rear cover (24) for holding the battery (19) vertically and backwardly is installed at the rear of the battery (19). That is, the rear cover (24) is inserted in the hitch mounting bracket (26) at the rear of the support plate (20) so that the L-shaped portion (25) formed on the rear cover holds the upper portion of the battery (19). , On both sides of the side wall frame (1
It is fixed to the rear surface of 1) and 11 by bolts with knobs 27 and 27. A gap is provided between the upper end of the rear cover (24) and the rear end of the fender (8) so that the cooling air from the cooling fan (18) can pass to the outside and the oil tank. (28) can be confirmed from outside the aircraft.
エンジン(4)に対する燃料タンク(29)は、前記両パ
イプフレーム(10),(10)間に架設された支持フレー
ム(30),(30)に支持された状態で、前記HST(6)
の上方に配設されている。The fuel tank (29) for the engine (4) is supported by the support frames (30) and (30) installed between the pipe frames (10) and (10) and the HST (6).
Is disposed above.
そして、冷却ファン(18)からの冷却風が機体後方がわ
へ案内されるように、燃料タンク(29)の下面と、HST
(6)の前部及び上部との間に風路(31)を形成してあ
る。Then, in order for the cooling air from the cooling fan (18) to be guided to the rear of the fuselage, the lower surface of the fuel tank (29) and the HST
An air passage (31) is formed between the front part and the upper part of (6).
また、作動油を貯留し、かつ自然流下式でHST(6)へ
の油補充を行う半透明プラスチック製のオイルタンク
(28)を、燃料タンク(29)及びHST(6)より後方の
前記風路(31)に臨む位置で、右がわのパイプフレーム
(10)に片持ち状に突設された支持ステー(32)に取付
けてある。その取付けは、第2図に示すように、断面形
状をU字状に折り曲げ形成され、かつその一側の外面に
ナットを溶接した補助取付具(33)を、ひれ(34)で補
強された状態でオイルタンク(28)後部外周に突出形成
された左右一対の取付部(35),(35)に、横から挾持
するように係合させ、かつ、前記支持ステー(32)、補
助取付具(33)、及び取付部(35),(35)夫々に形成
されたねじ挿通用の孔の位置を一致させた上で、蝶ねじ
(36),(36)を補助取付具(33)のナットに螺着して
締結することによりなされている。In addition, a semi-transparent plastic oil tank (28) that stores hydraulic oil and replenishes the HST (6) by gravity flow is installed in the rear of the fuel tank (29) and HST (6). It is attached to a support stay (32) projecting in a cantilever manner on the right pipe frame (10) at a position facing the road (31). As shown in FIG. 2, the attachment is reinforced by a fin (34) with an auxiliary fixture (33) having a U-shaped cross section and a nut welded to the outer surface on one side thereof. In this state, the pair of left and right mounting portions (35) and (35) projectingly formed on the outer periphery of the rear portion of the oil tank (28) are engaged so as to be sandwiched from the side, and the support stay (32) and the auxiliary mounting tool are attached. (33) and the mounting portions (35), (35), the holes for screw insertion formed in the respective holes are aligned, and then the thumbscrews (36), (36) are attached to the auxiliary fixture (33). It is made by screwing and fastening the nut.
また、オイルタンク(28)の下端からの油補充用のオイ
ルパイプ(37)が、HST(6)に接続され、HST(6)内
の作動油をその内圧でオイルタンク(28)へ還元するリ
ターンパイプ(38)が、HST(6)からオイルタンク(2
8)上部に接続されている。An oil pipe (37) for replenishing oil from the lower end of the oil tank (28) is connected to the HST (6), and the working oil in the HST (6) is returned to the oil tank (28) by its internal pressure. Return pipe (38) goes from HST (6) to oil tank (2
8) Connected to the top.
上記構成において、HST(6)の入力軸(14)とともに
回転することで冷却ファン(18)は、HST(6)に冷却
風を送るとともに、オイルタンク(28)に対しても風路
(31)を通して冷却風を送る。また、上記構成で、フェ
ンダー(8)とリアカバー(24)との間の隙間からオイ
ルタンク(28)における油量をチェックできるととも
に、リアカバー(24)を外すだけで、オイルタンク(2
8)への油補充、交換、バッテリー(19)の取外し等、
メインテナンス作業が容易に行える。In the above structure, the cooling fan (18) sends cooling air to the HST (6) by rotating with the input shaft (14) of the HST (6), and also the air passage (31) to the oil tank (28). ) Through cooling air. Further, with the above configuration, the amount of oil in the oil tank (28) can be checked from the gap between the fender (8) and the rear cover (24), and the oil tank (2
8) Oil replenishment, replacement, battery (19) removal, etc.
Easy maintenance work.
尚、実用新案登録請求の範囲の項に図面との対照を便利
にする為に符号を記すが、該記入により本考案は添付図
面の構造に限定されるものではない。It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.
図面は本考案に係る乗用型農作業車の実施例を示し、第
1図は要部を示す縦断側面図、第2図はオイルタンクの
取付構造を示す斜視図、第3図は要部を示す縦断正面
図、第4図は要部を示す平面図、第5図は乗用型芝刈機
を示す全体側面図である。 (6)……油圧式無段変速装置、(18)……冷却ファ
ン、(28)……オイルタンク、(29)……燃料タンク、
(31)……風路。The drawings show an embodiment of a riding-type agricultural work vehicle according to the present invention. FIG. 1 is a vertical cross-sectional side view showing an essential part, FIG. 2 is a perspective view showing an oil tank mounting structure, and FIG. 3 is an essential part. FIG. 4 is a vertical sectional front view, FIG. 4 is a plan view showing a main part, and FIG. 5 is an overall side view showing a riding type lawnmower. (6) …… hydraulic continuously variable transmission, (18) …… cooling fan, (28) …… oil tank, (29) …… fuel tank,
(31) …… The wind path.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 結城 三喜雄 大阪府堺市石津北町64番地 久保田鉄工株 式会社堺製造所内 (56)参考文献 実開 昭59−145123(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Mikio Yuki 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Sakai Works (56) References: 59-145123 (JP, U)
Claims (1)
段変速装置(6)を、機体後部に配設するとともに、燃
料タンク(29)を、その下面と前記油圧式無段変速装置
(6)との間に前記冷却ファン(18)からの冷却風を後
方へ案内する風路(31)を形成した状態で前記油圧式無
段変速装置(6)の上方に配設して、かつ、自然流下で
前記油圧式無段変速装置(6)へ油補充を行うとともに
該変速装置(6)からのリーク油の循環回収を行うオイ
ルタンク(28)を、前記風路(31)の後方がわに設けて
ある乗用型農作業車。1. A hydraulic continuously variable transmission (6) having a cooling fan (18) at a front portion thereof is arranged at a rear portion of an airframe, and a fuel tank (29) is provided at a lower surface of the fuel tank (29) and the hydraulic continuously variable gear. It is arranged above the hydraulic continuously variable transmission (6) in a state where an air passage (31) for guiding the cooling air from the cooling fan (18) to the rear is formed between the transmission and the transmission (6). In addition, the oil tank (28) for replenishing oil to the hydraulic continuously variable transmission (6) and circulatingly collecting leaked oil from the transmission (6) is provided with the air passage (31 ) A riding-type farm work vehicle that is provided on the rear side of ().
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3131389U JPH0714050Y2 (en) | 1989-03-17 | 1989-03-17 | Passenger farm work vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3131389U JPH0714050Y2 (en) | 1989-03-17 | 1989-03-17 | Passenger farm work vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02121428U JPH02121428U (en) | 1990-10-02 |
JPH0714050Y2 true JPH0714050Y2 (en) | 1995-04-05 |
Family
ID=31257087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3131389U Expired - Lifetime JPH0714050Y2 (en) | 1989-03-17 | 1989-03-17 | Passenger farm work vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0714050Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004124714A (en) * | 2002-09-30 | 2004-04-22 | Aisin Seiki Co Ltd | Water pump |
JP2021185765A (en) * | 2020-05-26 | 2021-12-13 | 株式会社クボタ | Sulky field work vehicle |
-
1989
- 1989-03-17 JP JP3131389U patent/JPH0714050Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02121428U (en) | 1990-10-02 |
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