JPH0716934Y2 - Hydraulic mechanism of work vehicle - Google Patents
Hydraulic mechanism of work vehicleInfo
- Publication number
- JPH0716934Y2 JPH0716934Y2 JP1986194727U JP19472786U JPH0716934Y2 JP H0716934 Y2 JPH0716934 Y2 JP H0716934Y2 JP 1986194727 U JP1986194727 U JP 1986194727U JP 19472786 U JP19472786 U JP 19472786U JP H0716934 Y2 JPH0716934 Y2 JP H0716934Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic clutch
- clutch
- lid
- shaft
- 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
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、変速用の油圧アクチュエータの作動と連動し
て入り切り操作される油圧クラッチを走行伝動系に介装
する状態でミッションケースに内装してある作業車の油
圧機構に関し、詳しくは、油圧クラッチを作動させるた
めの油路構造に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention has a hydraulic clutch that is turned on and off in conjunction with the operation of a hydraulic actuator for gear shifting and is installed in a transmission case in a state in which it is installed in a traveling transmission system. The present invention relates to a hydraulic mechanism of a working vehicle, and more particularly, to an oil passage structure for operating a hydraulic clutch.
冒記の如く構成された油圧機構としては、例えば、実開
昭58-187648号公報に示されるものがあり、該引例の油
圧機構では油圧クラッチとこの油圧クラッチの作動を制
御する油圧機器との間の油路が、油圧クラッチと連結す
る回転軸に穿設された流路と、この流路と連通する管路
とで成っている。An example of the hydraulic mechanism configured as described in the introduction is that disclosed in Japanese Utility Model Laid-Open No. 58-187648. In the hydraulic mechanism of the reference, a hydraulic clutch and a hydraulic device that controls the operation of the hydraulic clutch are used. The oil passage between them is made up of a flow passage formed in the rotary shaft that is connected to the hydraulic clutch, and a pipe passage that communicates with this flow passage.
又、冒記の如く変速用の油圧アクチュエータの作動と連
動して油圧クラッチが操作される場合には、油圧アクチ
ュエータの作動から油圧クラッチの操作までのタイムラ
グを小さくする観点から、油圧クラッチとこの油圧クラ
ッチの作動を制御する油圧機器との間の油路の長さをで
きるだけ短縮することが望ましい。Further, when the hydraulic clutch is operated in conjunction with the operation of the hydraulic actuator for shifting as described above, from the viewpoint of reducing the time lag from the operation of the hydraulic actuator to the operation of the hydraulic clutch, the hydraulic clutch and the hydraulic pressure It is desirable to shorten the length of the oil passage to and from the hydraulic device that controls the operation of the clutch as much as possible.
そこで、該油圧機器をミッションケースに内装して油路
の長さの短縮を図ることも考えられるが、油圧機器を単
にミッションケースに内装しようとすると、ミッション
ケースの比較的狭い空間に対して油圧機器を組込まねば
ならず、油圧機器の配設に困難を伴うことも予想され
る。Therefore, it is conceivable to install the hydraulic equipment in the mission case to shorten the length of the oil passage. However, if the hydraulic equipment is simply installed in the mission case, the hydraulic pressure will be reduced in a relatively narrow space of the mission case. It is expected that it will be difficult to install hydraulic equipment because the equipment must be incorporated.
本考案の目的は、油圧クラッチとこの油圧クラッチの作
動を制御する油圧機器との間の油路の長さの短縮化を、
油圧機器の配設によって図り油圧クラッチの迅速操作を
行うと共に、この油圧機器の配設のための作業をできる
だけ楽に行う点にある。The object of the present invention is to reduce the length of the oil passage between the hydraulic clutch and the hydraulic equipment that controls the operation of this hydraulic clutch.
The point is that the hydraulic clutch can be quickly operated by disposing the hydraulic device, and the work for disposing the hydraulic device can be performed as easily as possible.
本考案の特徴は、変速用の油圧アクチュエータの作動と
連動して入り切り操作される油圧クラッチを走行伝動系
に介装する状態でミッションケースに内装してある作業
車の油圧機構であって、前記油圧クラッチの作動を制御
する油圧機器を、前記ミッションケースの壁部に形成し
た開口を閉塞する蓋体の内面に対して、該蓋体の外面か
ら着脱できるよう構成すると共に、前記油圧クラッチ操
作用の流路を、前記油圧クラッチに対する伝動軸の軸芯
に沿う方向視で、前記油圧機器と重複する位置まで突設
されたミッションケース側の部材に形成し、この突設部
位の流路が形成された部材と、前記油圧機器との間に、
前記蓋体と略平行する平面上に位置させて前記油圧クラ
ッチを操作するための送油管を前記伝動軸の軸芯と平行
する姿勢に架橋状態で配設してある点にあり、その作
用、及び、効果は次の通りである。A feature of the present invention is a hydraulic mechanism for a work vehicle, which is installed in a transmission case in a state in which a hydraulic clutch that is turned on and off in conjunction with the operation of a hydraulic actuator for shifting is installed in a transmission case. A hydraulic device for controlling the operation of the hydraulic clutch is configured to be attachable to and detachable from the outer surface of the lid body with respect to the inner surface of the lid body that closes the opening formed in the wall portion of the mission case, Is formed in a member on the mission case side projecting to a position overlapping with the hydraulic equipment when viewed in the direction along the axis of the transmission shaft with respect to the hydraulic clutch, and the flow channel of this projecting portion is formed. Between the member and the hydraulic device,
The oil feed pipe for operating the hydraulic clutch located on a plane substantially parallel to the lid is arranged in a bridge state in a posture parallel to the axis of the transmission shaft, and its action, And, the effects are as follows.
上記特徴によると、この作業車の油圧機器を組立てる場
合には、ミッションケースの開口の内部に油圧機器を配
置すると共に、この油圧機器と油圧クラッチ操作用の流
路が形成された部材との間に送油管を配設し、開口を蓋
体によって閉塞すると同時に蓋体の外面から、この蓋体
の内面に油圧機器を固定することにより、油圧機器から
の圧油を送油管、流路夫々を介して油圧クラッチに供給
して該油圧クラッチを制御できるものとなる。According to the above characteristics, when assembling the hydraulic equipment of this work vehicle, the hydraulic equipment is arranged inside the opening of the mission case, and between the hydraulic equipment and the member in which the flow path for operating the hydraulic clutch is formed. By disposing an oil feeding pipe in the container and closing the opening with the lid, at the same time by fixing the hydraulic device from the outer surface of the lid to the inner surface of the lid, the pressure oil from the hydraulic device is fed to the oil feeding pipe and the flow passage, respectively. It is possible to control the hydraulic clutch by supplying it to the hydraulic clutch via.
又、蓋体の内面で、かつ、油圧クラッチに対する伝動軸
の軸芯に沿う方向視で流路が形成された部材と重複する
位置に油圧機器が配置され、しかも、送油管が伝動軸の
軸芯に沿う姿勢に配設されるので、油圧機器を油圧クラ
ッチに近接する位置に配置することにより配設空間のコ
ンパクト化を可能にし、しかも、蓋体内面の油圧機器か
らの圧油を短い距離で油圧クラッチに供給することが可
能になると共に、送油管の姿勢が油圧機器からの圧油を
最短距離で送る姿勢に設定されるので、一層迅速な制御
が可能となる。Further, the hydraulic device is arranged on the inner surface of the lid and at a position overlapping with the member having the flow path formed when viewed in the direction along the axis of the transmission shaft with respect to the hydraulic clutch, and the oil supply pipe is provided with the shaft of the transmission shaft. Since it is arranged in a posture along the core, it is possible to make the installation space compact by arranging the hydraulic equipment in a position close to the hydraulic clutch, and, moreover, the pressure oil from the hydraulic equipment on the inner surface of the lid is short distance. It is possible to supply the oil to the hydraulic clutch, and the attitude of the oil supply pipe is set to the attitude of sending the pressure oil from the hydraulic equipment in the shortest distance, so that more rapid control is possible.
従って、変速用の油圧アクチュエータの作動から油圧ク
ラッチの操作までのタイムラグが小さくなって油圧クラ
ッチを迅速に操作できると共に、油圧クラッチの作動を
制御する油圧機器を小さい空間に対して楽に配設できる
ようになった。Therefore, the time lag from the operation of the hydraulic actuator for shifting to the operation of the hydraulic clutch is reduced, the hydraulic clutch can be quickly operated, and the hydraulic equipment for controlling the operation of the hydraulic clutch can be easily installed in a small space. Became.
特に、本考案では部材と油圧機器との間に介装される送
油管を予めセットできるので、例えば、油圧機器を蓋体
に予め取りつけておくものと比較すると蓋体との開閉に
よっても、該送油管を変形させる如き不都合を生ずるこ
とも無いという効果も奏する。In particular, in the present invention, the oil feed pipe interposed between the member and the hydraulic device can be set in advance, so that, for example, even when the hydraulic device is opened and closed as compared with the case where the hydraulic device is attached to the lid in advance, There is also an effect that there is no inconvenience such as deformation of the oil supply pipe.
以下、本考案の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第３図及び第４図に示すように、エンジン（１）からの
動力を主クラッチ（２）を介してミッションケース
（３）に伝えると共に、ミッションケース（３）からの
変速動力で前後車輪（４），（５）を駆動し、かつ、ミ
ッションケース（３）の後端に突設した外部動力取出し
軸（６）を駆動するよう作業車の一例として農用トラク
タの伝動系を構成する。As shown in FIG. 3 and FIG. 4, the power from the engine (1) is transmitted to the mission case (3) via the main clutch (2), and the front and rear wheels ( A transmission system of an agricultural tractor is configured as an example of a work vehicle so as to drive 4) and (5) and also to drive an external power take-off shaft (6) provided at a rear end of a mission case (3).
第３図に示すように、ミッションケース（３）には、入
力軸（７）からの動力を４段に変速して第１軸（８）に
伝えるシンクロメッシュ式の主変速装置（Ａ）、第１軸
（８）と第２軸（９）との間に介装された多板式油圧ク
ラッチ（Ｃ）、第２軸（９）からの動力を第３軸（10）
に対して前進２段後進１段に変速して伝えるシンクロメ
ッシュ式の副変速装置（Ｂ）、第３軸（10）からの動力
を前記後車輪（５）に伝える差動機構（11）、第３軸
（10）からの動力を前記前輪（４）に対する出力軸（1
2）に伝えるギヤ連動機構（13）、入力軸（７）からの
動力を２段に変速して、前記外部動力取出し軸（６）に
対する第４軸（14）に伝えるコンスタントメッシュ式の
PTO変速装置（Ｄ）等を内装して成り、第４軸（14）に
は一方クラッチ（15）が介装され、又、出力軸（12）か
らの動力は中間軸（16）及び差動機構（17）を介して前
輪（４）に伝えられる。As shown in FIG. 3, in the mission case (3), a synchromesh type main transmission (A) that shifts the power from the input shaft (7) to four stages and transmits the power to the first shaft (8), A multi-plate hydraulic clutch (C) interposed between the first shaft (8) and the second shaft (9), and power from the second shaft (9) is transferred to the third shaft (10).
, A synchromesh type auxiliary transmission device (B) that shifts and transmits two forward gears and one reverse gear, a differential mechanism (11) that transmits power from the third shaft (10) to the rear wheels (5), The power from the third shaft (10) is transferred to the output shaft (1
2) The gear interlocking mechanism (13) that transmits to the 2), the power from the input shaft (7) is shifted in two steps, and is transmitted to the fourth shaft (14) with respect to the external power take-off shaft (6) by a constant mesh type.
The PTO gearbox (D), etc. are installed inside, the one-way clutch (15) is installed on the fourth shaft (14), and the power from the output shaft (12) is transmitted to the intermediate shaft (16) and the differential. It is transmitted to the front wheel (4) via the mechanism (17).
当該農用トラクタの変速系では、主変速装置（Ａ）の２
つの変速用スリーブ（18），（19）の操作、及び副変速
装置（Ｂ）の前進用の変速用スリーブ（20）の操作夫々
を油圧アクチュエータ（18a），（19a），（20a）で行
うと共に、これら油圧アクチュエータ（18a），（19
a），（20a）で変速操作が行われる直前に前記油圧クラ
ッチ（Ｃ）を切り操作し、かつ、変速操作直後に該油圧
クラッチ（Ｃ）を伝動状態に操作するようシーケンス作
動型に油圧系が構成され、主クラッチ（２）を切り操作
すること無く変速操作が行われる。In the transmission system of the agricultural tractor, the main transmission (A) 2
The hydraulic actuators (18a), (19a) and (20a) are used to operate the two speed-changing sleeves (18) and (19) and to operate the speed-changing sleeve (20) for advancing the auxiliary transmission (B), respectively. Together with these hydraulic actuators (18a), (19
a) and (20a), the hydraulic clutch (C) is disengaged immediately before the gear shift operation is performed, and the hydraulic clutch (C) is operated in the transmission state immediately after the gear shift operation. The shift operation is performed without disengaging the main clutch (2).
第１図に示すように、前記油圧クラッチ（Ｃ）は、第１
軸（８）にスプライン部を介して外嵌すると共に第２軸
（９）に対してニードルベアリング（22）を介して外嵌
する第１部材（21）と、第２軸（９）にスプライン部を
介して外嵌し、かつ、前記第１部材（21）の内側の筒状
部（21a）にボールベアリング（24）を介して外嵌する
第２部材（23）と、第１部材（21）の大径部（21b）に
支持された多数のディスクプレート（25）…と、これら
のディスクプレート（25）…と交互に配置され、かつ、
第２部材（23）に支持された多数のディスクプレート
（26）…と、これらディスクプレート（25）…，（26）
…を圧接操作する油圧ピストン（27）と、これらディス
クプレート（25）…，（26）…を離間する方向に付勢す
るバネ（28）とで成っている。As shown in FIG. 1, the hydraulic clutch (C) has a first
A first member (21) externally fitted to the shaft (8) via a spline portion and externally fitted to the second shaft (9) via a needle bearing (22), and a spline to the second shaft (9). A second member (23) externally fitted via a ball bearing (24) to the tubular portion (21a) inside the first member (21), and a first member ( A large number of disc plates (25) supported by the large diameter portion (21b) of 21) and these disc plates (25) are alternately arranged, and
A large number of disc plates (26) supported by the second member (23), and these disc plates (25), (26)
It is composed of a hydraulic piston (27) for pressing and operating the ... And a spring (28) for urging the disc plates (25) ,.
尚、油圧による変速操作系は第５図に示す如く、油圧ポ
ンプ（31）、変速用バルブ（32）、前記３つの油圧アク
チュエータ（18a），（19a），（20a）夫々と一体的に
構成されると共に作動時にパイロット圧を変化させる３
つのシーケンスバルブ（18v），（19v），（20v）、前
後進切換操作時にパイロット圧を変化させるシーケンス
バルブ（Bv）、油圧ポンプ（31）、油圧クラッチ（Ｃ）
との間の油路（Ｒ）に介装された調圧機構（33）、及び
油圧機器の一例としての論理バルブ機構（34）で成り、
変速用バルブ（32）の操作によって油圧アクチュエータ
（18a），（19a），（20a）夫々が作動する際にはシー
ケンスバルブ（18v），（19v），（20v）夫々からのパ
イロット圧の変化によって、油圧クラッチ（Ｃ）が一旦
切り操作され、この後、伝動状態に操作されるよう作動
する。As shown in FIG. 5, the hydraulic pressure shift operation system is integrally configured with a hydraulic pump (31), a shift valve (32), and the three hydraulic actuators (18a), (19a), (20a). Is changed and the pilot pressure is changed during operation 3
Sequence valves (18v), (19v), (20v), sequence valve (Bv) that changes pilot pressure during forward / reverse switching operation, hydraulic pump (31), hydraulic clutch (C)
And a logical valve mechanism (34) as an example of a hydraulic device, and a pressure regulating mechanism (33) interposed in an oil passage (R) between
When the hydraulic actuators (18a), (19a), (20a) are operated by the operation of the shift valve (32), the pilot pressure changes from the sequence valves (18v), (19v), (20v) The hydraulic clutch (C) is once operated to be disengaged, and then operated to be in the transmission state.
当該農用トラクタでは、第１図及び第２図に示すように
ミッションケース（３）の側壁部（3a）に開口（3b）が
形成されると共に、この開口（3b）を閉塞する蓋体（3
5）の内面に対して前記油圧アクチュエータ（18a），
（19a），（20a）、変速用バルブ（32）、調圧機構（3
3）、論理バルブ機構（34）等が取付けられ、又、前記
油路（Ｒ）のうち油圧クラッチ（Ｃ）と論理バルブ機構
（34）との間に形成される油路（Ｒ）は以下のように形
成されている。In the agricultural tractor, as shown in FIGS. 1 and 2, an opening (3b) is formed in a side wall portion (3a) of a mission case (3), and a lid (3) that closes the opening (3b) is formed.
5) to the inner surface of the hydraulic actuator (18a),
(19a), (20a), speed change valve (32), pressure regulating mechanism (3
3), the logical valve mechanism (34) and the like are attached, and the oil passage (R) formed between the hydraulic clutch (C) and the logical valve mechanism (34) in the oil passage (R) is as follows. It is formed like.
つまり、ミッションケース（３）の側には油圧クラッチ
（Ｃ）の油圧ピストン（27）と連通する流路（36）が穿
設された部材（37）が設けられ、この部材（37）の外端
部には第１、第２軸（８），（９）夫々に沿う方向に向
かう係合孔（37a）が流路（36）と連通する状態で形成
されている。That is, a member (37) having a passage (36) communicating with the hydraulic piston (27) of the hydraulic clutch (C) is provided on the side of the transmission case (3), and the member (37) is provided outside the member (37). Engagement holes (37a) extending in the directions along the first and second shafts (8) and (9) are formed in the end portions so as to communicate with the flow paths (36).
又、論理バルブ機構（34）にも前記係合孔（37a）と対
向する位置に係合孔（34a）が形成され、論理バルブ機
構（34）を組込む場合には、これら両係合孔（37a），
（34a）の間に送油管（38）を蓋体（35）と平行する平
面上に位置させ、かつ、第１軸（８）、第２軸（９）の
軸芯に沿う姿勢に架橋状態で介装すると共に、ミッショ
ンケース（３）の開口（3b）を蓋体（35）で閉塞する際
に、蓋体（35）の外側からボルト（39），（39）によっ
て、該論理バルブ機構（34）を固定するようになってい
る。Further, the logical valve mechanism (34) also has an engaging hole (34a) formed at a position facing the engaging hole (37a), and when the logical valve mechanism (34) is assembled, both of these engaging holes ( 37a),
The oil feed pipe (38) is positioned between the (34a) and the lid (35) on a plane parallel to the first shaft (8) and the second shaft (9). The logical valve mechanism is provided by bolts (39) and (39) from the outside of the lid (35) when the opening (3b) of the mission case (3) is closed by the lid (35). It is designed to fix (34).
因みに、論理バルブ機構（34）を作動させるためパイロ
ット圧を伝えるための油路等は蓋体（35）の内部に形成
されている。Incidentally, an oil passage or the like for transmitting a pilot pressure for operating the logic valve mechanism (34) is formed inside the lid (35).
本考案は、上記実施例以外に例えば、送油管の姿勢を縦
方向に設定してもよい。In the present invention, the posture of the oil feed pipe may be set in the vertical direction other than the above embodiment.
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作業車の油圧機構の実施例を示し、
第１図は油圧クラッチに対する油路を示す横断平面図、
第２図は油圧クラッチに対する油路を示縦断面図、第３
図はミッションケースの断面図、第４図はトラクタの伝
動系を示す概略図、第５図は油圧操作系を示す油圧回路
図である。 （３）……ミッションケース、（3a）……ミッションケ
ースの壁部、（3b）……ミッションケースの開口、（3
4）……油圧機器、（35）……蓋体、（36）……流路、
（37）……部材、（38）……送油管、（Ｃ）……油圧ク
ラッチ。The drawings show an embodiment of a hydraulic mechanism of a work vehicle according to the present invention,
FIG. 1 is a cross-sectional plan view showing an oil passage for a hydraulic clutch,
FIG. 2 is a longitudinal sectional view showing an oil passage for a hydraulic clutch, and FIG.
FIG. 4 is a sectional view of the transmission case, FIG. 4 is a schematic view showing a transmission system of the tractor, and FIG. 5 is a hydraulic circuit diagram showing a hydraulic operation system. (3) ... mission case, (3a) ... mission case wall, (3b) ... mission case opening, (3
4) …… hydraulic equipment, (35) …… lid, (36) …… flow path,
(37) …… Member, (38) …… Oil transfer pipe, (C) …… Hydraulic clutch.
Claims (1)
して入り切り操作される油圧クラッチ（Ｃ）を走行伝動
系に介装する状態でミッションケース（３）に内装して
ある作業車の油圧機構であって、前記油圧クラッチ
（Ｃ）の作動を制御する油圧機器（34）を、前記ミッシ
ョンケース（３）の壁部（3a）に形成した開口（3b）を
閉塞する蓋体（35）の内面に対して、該蓋体（35）の外
面から着脱できるよう構成すると共に、前記油圧クラッ
チ（Ｃ）操作用の流路（36）を、前記油圧クラッチ
（Ｃ）に対する伝動軸の軸芯に沿う方向視で、前記油圧
機器（34）と重複する位置まで突設されたミッションケ
ース（３）側の部材（37）に形成し、この突設部位の流
路（36）が形成された部材（37）と、前記油圧機器（3
4）との間に、前記蓋体（35）と略平行する平面上に位
置させて前記油圧クラッチ（Ｃ）を操作するための送油
管（38）を前記伝動軸の軸芯と平行する姿勢に架橋状態
で配設してある作業車の油圧機構。1. A hydraulic mechanism for a working vehicle, wherein a hydraulic clutch (C), which is turned on and off in conjunction with the operation of a hydraulic actuator for shifting, is installed in a transmission case (3) in a state in which it is installed in a traveling transmission system. A hydraulic device (34) for controlling the operation of the hydraulic clutch (C) is provided in a lid (35) for closing an opening (3b) formed in a wall portion (3a) of the mission case (3). The lid (35) is configured to be attachable to and detachable from the inner surface, and the hydraulic clutch (C) operating flow path (36) is used as an axis of a transmission shaft for the hydraulic clutch (C). A member formed in a member (37) on the side of the mission case (3) protruding to a position overlapping with the hydraulic equipment (34) as viewed in the direction along the flow path (36) of the protruding portion. (37) and the hydraulic equipment (3
4) and an attitude in which an oil feed pipe (38) for operating the hydraulic clutch (C), which is located on a plane substantially parallel to the lid (35), is parallel to the axis of the transmission shaft. A hydraulic mechanism for a work vehicle installed in a bridge state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986194727U JPH0716934Y2 (en) | 1986-12-18 | 1986-12-18 | Hydraulic mechanism of work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986194727U JPH0716934Y2 (en) | 1986-12-18 | 1986-12-18 | Hydraulic mechanism of work vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6399057U JPS6399057U (en) | 1988-06-27 |
| JPH0716934Y2 true JPH0716934Y2 (en) | 1995-04-19 |
Family
ID=31151964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986194727U Expired - Lifetime JPH0716934Y2 (en) | 1986-12-18 | 1986-12-18 | Hydraulic mechanism of work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716934Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797726U (en) * | 1980-12-09 | 1982-06-16 | ||
| JPS58187648U (en) * | 1982-06-10 | 1983-12-13 | 株式会社クボタ | Piping structure of fluid pressure transmission |
-
1986
- 1986-12-18 JP JP1986194727U patent/JPH0716934Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6399057U (en) | 1988-06-27 |
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