JPH02199362A - Shift operation structure - Google Patents

Shift operation structure

Info

Publication number
JPH02199362A
JPH02199362A JP1018291A JP1829189A JPH02199362A JP H02199362 A JPH02199362 A JP H02199362A JP 1018291 A JP1018291 A JP 1018291A JP 1829189 A JP1829189 A JP 1829189A JP H02199362 A JPH02199362 A JP H02199362A
Authority
JP
Japan
Prior art keywords
hydraulic
valve
shift
clutch
hydraulic clutch
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.)
Pending
Application number
JP1018291A
Other languages
Japanese (ja)
Inventor
Masaru Machida
賢 町田
Akio Hattori
彰夫 服部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Kubota Seiki Co Ltd
Original Assignee
Kubota Corp
Kubota Seiki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp, Kubota Seiki Co Ltd filed Critical Kubota Corp
Priority to JP1018291A priority Critical patent/JPH02199362A/en
Priority to US07/423,765 priority patent/US5012909A/en
Priority to KR1019890015185A priority patent/KR920008000B1/en
Priority to DE3936116A priority patent/DE3936116C2/en
Priority to FR8914323A priority patent/FR2642016A1/en
Publication of JPH02199362A publication Critical patent/JPH02199362A/en
Pending legal-status Critical Current

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  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Control Of Transmission Device (AREA)

Abstract

PURPOSE:To quickly disengage a hydraulic clutch at the time of a shift by providing a valve mechanism controlling the pilot pressure for a transfer valve in conjunction with the operation of a shift control valve controlling a hydraulic actuator so as to start the operation of the transfer valve prior to the operation start of the hydraulic actuator. CONSTITUTION:The pilot pressure for a transfer valve 9 is decreased prior to the operation of hydraulic cylinders T1-T3, and a hydraulic clutch B is disengaged. Intermediate operation positions (n)... to release the pressure of a pilot passage 11 to a tank side are formed in the middle of individual shift operation positions of a shift control valve 10. This valve 10 is concurrently used as a valve mechanism G to control the pilot pressure for the transfer valve 9. The intermediate operation positions (n)... temporarily appear in the middle of the shift operation.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、走行伝動系に油圧クラッチを介装し、変速装
置に変速用の油圧アクチュエータを備え、この油圧アク
チュエータの作動による変速操作の開始時に油圧クラッ
チを切り操作し、変速操作の完了時に前記油圧クラッチ
を入り操作すべく油圧アクチュエータの作動と連係して
操作されるパイロット圧操作型の切換弁を油圧クラッチ
に対する油路に介装して成る変速操作構造に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a system in which a hydraulic clutch is interposed in a travel transmission system, a transmission is equipped with a hydraulic actuator for shifting, and a shifting operation is started by operating the hydraulic actuator. A pilot pressure-operated switching valve that is operated in conjunction with the operation of a hydraulic actuator is interposed in the oil path for the hydraulic clutch so that the hydraulic clutch is disengaged when the gear shift operation is completed, and the hydraulic clutch is engaged and operated when the gear shift operation is completed. This invention relates to a speed change operation structure.

〔従来の技術〕[Conventional technology]

従来、上記のように構成された変速操作構造としては、
特開昭62−49063号公報に示されるものが存在し
、この引例では、複数の油圧アクチュエータ夫々に対応
する複数の切換弁が備えられ、複数の油圧アクチュエー
タ夫々には切換弁に対応するパイロット圧を制御する弁
部が一体的に形成されている。
Conventionally, the shift operation structure configured as described above is as follows:
There is a method disclosed in Japanese Patent Application Laid-Open No. 62-49063, in which a plurality of switching valves corresponding to a plurality of hydraulic actuators are provided, and each of the plurality of hydraulic actuators is provided with a pilot pressure corresponding to the switching valve. A valve section for controlling the is integrally formed.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、前記引例の変速操作構造では、油圧クラッチが
作動を開始した後にパイロット圧が切換るため、変速時
には、油圧クラッチを切り操作する際の理想するタイミ
ングから少し遅れて油圧クラッチが切り操作されること
になる。
However, in the shift operation structure cited in the above reference, the pilot pressure is switched after the hydraulic clutch starts operating, so when shifting, the hydraulic clutch is disengaged a little later than the ideal timing when the hydraulic clutch is disengaged. It turns out.

つまり、変速時には油圧アクチュエータから作動を開始
する直前に油圧クラッチが切り操作されることを理想さ
するものの、前記引例の構造では、油圧アクチュエータ
が作動を開始した後にパイロット圧が切換るため、油圧
クラッチが切り操作されるタイミングに遅れを生じてい
たのである。
In other words, while it is ideal for the hydraulic clutch to be disengaged immediately before the hydraulic actuator starts operating during gear shifting, in the structure of the cited example, the pilot pressure is switched after the hydraulic actuator starts operating, so the hydraulic clutch There was a delay in the timing when the switch was turned off.

本発明の目的は、変速時にはできるだけ迅速に油圧クラ
ッチを切り操作できる変速操作構造を合理的に構成する
点にある。
An object of the present invention is to rationally configure a shift operation structure that allows the hydraulic clutch to be disengaged as quickly as possible during a shift.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の特徴は、前記のように変速用の油圧アクチュエ
ータ、及び、パイロット操作型の切換弁で操作される油
圧クラッチを備えて成る変速操作構造において、前記油
圧アクチュエータの作動開始に先立って前記切換弁の操
作を開始すべく、前記油圧アクチュエータを制御する変
速制御弁の操作と連係して切換弁に対するパイロット圧
を制御する弁機構を有して成る点にあり、その作用、及
び効果は次の通りである。
A feature of the present invention is that in the transmission operation structure comprising a hydraulic actuator for transmission and a hydraulic clutch operated by a pilot-operated switching valve as described above, the switching operation is performed before the hydraulic actuator starts operating. In order to start operation of the valve, the valve mechanism is configured to control the pilot pressure to the switching valve in conjunction with the operation of the speed change control valve that controls the hydraulic actuator, and its operation and effect are as follows. That's right.

〔作 用〕[For production]

上記特徴を例えば第1図に示すように構成すると、変速
時には変速制御弁(10〉の操作と連係して弁機構(G
)が切換弁(9)に対するパイロット圧を制御して切換
弁(9)を操作できることになる。
If the above characteristics are configured as shown in FIG. 1, for example, when changing gears, the valve mechanism (G
) can control the pilot pressure to the switching valve (9) to operate the switching valve (9).

つまり、油圧アクチュエータ(TI )、 (’rz 
)、 (T3 )の作動開始以前に切換弁(9)を操作
して油圧クラッチ(B)を切り操作できるのである。
That is, hydraulic actuator (TI), ('rz
), (T3) can be operated to switch off the hydraulic clutch (B) by operating the switching valve (9).

尚、第1図に示す構造では変速操作弁(10)の変速操
作位置各段に対応して形成される操作位置の中間におい
て切換弁(9)を操作するよう、変速操作弁(10)の
一部が弁機構(G)に兼用されている。
In the structure shown in FIG. 1, the shift operation valve (10) is arranged so that the switching valve (9) is operated in the middle of the operation positions formed corresponding to the respective shift operation positions of the shift operation valve (10). A part is also used as the valve mechanism (G).

〔発明の効果〕〔Effect of the invention〕

従って、変速時には迅速に油圧クラッチを切り操作でき
る変速操作構造が合理的に構成されたのである。
Therefore, a shift operation structure has been rationally constructed that allows the hydraulic clutch to be quickly disengaged during gear changes.

特に本発明では、弁機構からのパイロット油路を単一に
できるので、切換弁も単一にできることとなり、切換弁
を単一にすることが可能となるという効果を奏すると共
に、油圧クラッチに対する油路長も短くできるので、油
圧クラッチを一層迅速に切り操作できるという効果も奏
する。
In particular, according to the present invention, since the pilot oil passage from the valve mechanism can be made single, the switching valve can also be made single. Since the path length can also be shortened, there is also the effect that the hydraulic clutch can be disengaged and operated more quickly.

〔実施例〕〔Example〕

以下、本発明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 based on the drawings.

第2図に示すように、エンジン(1)からの動力を多板
型の主クラッチ(2)を介して主変速装置(A)、多板
型の油圧クラッチ(B)、前後進切換装置(C)、副変
速装置(D)、超減速装置(B)夫々に順次伝えると共
に、変速動力を前後車輪(3)。
As shown in Fig. 2, power from the engine (1) is transmitted via a multi-disc main clutch (2) to a main transmission (A), a multi-disc hydraulic clutch (B), and a forward/reverse switching device ( C), the auxiliary transmission (D), and the super reduction gear (B), and transmits the shifting power to the front and rear wheels (3).

(4)夫々の差動装置(33)、 (43)に伝えるよ
う走行伝動系を形成し、又、前記主クラッチ(2)から
の動力を変速機構(5)を介して外部動力取出し軸(6
)に伝えるよう作業伝動系を形成して4輪駆動型農用ト
ラクタの駆動系を構成する。
(4) A travel transmission system is formed to transmit the power to the respective differentials (33) and (43), and the power from the main clutch (2) is transmitted to the external power take-off shaft (5) via the transmission mechanism (5). 6
) to form a work transmission system to transmit the information to the four-wheel drive agricultural tractor.

前記主変速装置(A)は、2つのシンクロメツシュ式の
ギヤ変速機構で成り、4段に変速可能であり、前記前後
進切換装置(C)、副変速装置(D)夫々は共に、シン
クロメツシュ式に構成され、又、主変速装置(A)は2
つの油圧シリンダ(TI )、(Tz )で、副変速装
置(D)は単一の油圧シリンダ(T3)で夫々変速操作
を行い、又、前後進切換装置(C)は手動により変速操
作を行うよう構成され、更に、この農用トラクタでは、
これら3種の変速操作が行われる際に、変速操作の開始
時に前記油圧クラッチ(B)を切り操作し、変速操作の
完了時に油圧クラッチ(B)を入り操作することで、前
記主クラッチ(2)を切り操作すること無く変速を行う
ための油圧制御系が備えられている。
The main transmission (A) is composed of two synchronized mesh gear transmission mechanisms, and is capable of shifting into four stages. It is configured in a mesh type, and the main transmission (A) has two
The auxiliary transmission (D) uses two hydraulic cylinders (TI) and (Tz) to perform gear shifting operations, respectively, and a single hydraulic cylinder (T3) to perform gear shifting operations, and the forward/reverse switching device (C) performs gear shifting operations manually. Furthermore, this agricultural tractor has the following features:
When performing these three types of gear shifting operations, the hydraulic clutch (B) is disengaged at the start of the gear shifting operation, and the hydraulic clutch (B) is engaged and operated at the completion of the gear shifting operation, whereby the main clutch (2 ) is equipped with a hydraulic control system to change gears without having to operate.

つまり、前記油圧制御系は第1図に示すように構成され
、この系では、油圧ポンプ(7)からの圧油を油圧クラ
ッチ(B)に供給するための油路(8)に、圧力制御機
構(F)、及び、パイロット圧操作型の切換弁(9)を
介装すると共に、前記3つの油圧シリンダ(TI )、
 (T2 )、 (T3 )を制御するロークリ型の変
速制御弁(10)、及び、前記切換弁(9)を操作する
パイロット圧を得るためのパイロット油路(11)を分
岐配設しである。
That is, the hydraulic control system is configured as shown in FIG. A mechanism (F) and a pilot pressure operated switching valve (9) are interposed, and the three hydraulic cylinders (TI),
(T2) and (T3), and a pilot oil line (11) for obtaining pilot pressure for operating the switching valve (9) is arranged in a branched manner. .

尚、前記油圧シリンダ(TI )、 (TI )、 (
T3 )、及び、前後進切換装置(C)の操作系夫々に
は、開閉作動型のチエツク弁(12)・・を連係してあ
り、変速操作時にはチエツク弁夫々の開閉操作により、
切換弁(9)に対するパイロット圧を変化させ、前述の
如く油圧クラッチ(B)を入り切り操作するようになっ
ている。
Note that the hydraulic cylinders (TI), (TI), (
T3) and the operating system of the forward/reverse switching device (C) are each linked with a check valve (12) of the open/close type.
The pilot pressure applied to the switching valve (9) is changed to operate the hydraulic clutch (B) on and off as described above.

更に、この変速操作構造では、前記油圧シリンダ(TI
 )+ (T2 )、 (T3 )の作動に先立って前
記切換弁(9)に対するパイロット圧を低下させて、油
圧クラッチ(B)を切り操作するため、第1図に示す如
く、前記変速制御弁(lO)の各変速操作位置の中間に
パイロット油路(11)の圧力をタンク側に逃がすため
の中間操作位置(n)・・が形成され、この変速制御弁
(10)を切換弁(9)に対するパイロット圧制御用の
弁機構(G)に兼用しである。尚、この中間操作位置(
n)・・は変速操作の途中において一時的に表れる。
Furthermore, in this shift operation structure, the hydraulic cylinder (TI
) + (T2) and (T3), the pilot pressure for the switching valve (9) is lowered to disengage the hydraulic clutch (B), as shown in FIG. An intermediate operating position (n) for releasing the pressure of the pilot oil passage (11) to the tank side is formed between each shift operating position of (lO), and this shift control valve (10) is connected to the switching valve (9). ) is also used as a valve mechanism (G) for pilot pressure control. Furthermore, this intermediate operating position (
n)... appears temporarily during the shift operation.

因みに、前記圧力制御機構(F)は切換弁(9)が入り
操作された際において、クラッチ圧の急激な上昇を抑制
し、所定の特性でクラッチ圧の上昇を図るよう構成され
ている。
Incidentally, the pressure control mechanism (F) is configured to suppress a sudden increase in clutch pressure and increase the clutch pressure with predetermined characteristics when the switching valve (9) is turned on and operated.

第3図に示すように、この農用トラクタの伝動系は、主
クラツチハウジング(13)、ミツドケース(14)、
リアケース(15)夫々を連結して成る伝動ケースに収
められ、主クラツチハウジング(13)には主クラッチ
(2)、主変速装置(A)を内装し、ミツドケース(1
4)には油圧クラッチ(B)、前後進切換機構(C)を
内装し、リアケース(15)には副変速装置(D)、超
減速装置(B)を内装している。
As shown in Figure 3, the transmission system of this agricultural tractor consists of a main clutch housing (13), a mid case (14),
The main clutch housing (13) houses the main clutch (2) and the main transmission (A), and the mid case (15) is housed in a transmission case that connects the rear cases (15).
4) is equipped with a hydraulic clutch (B) and a forward/reverse switching mechanism (C), and the rear case (15) is equipped with an auxiliary transmission (D) and a super reduction gear (B).

同図に示すようにミツドケース(14)には、油圧クラ
ッチ(B)の側方を開放する開口(143)が形成され
、主変速用の2つのシフタ(16)、 (16)と連結
するシフトロッド(17)、 (17)の端部、及び、
副変速用のシフタ(18)と連結するシフトロッド(1
9)の端部を、この開口部まで延設してあり、第4図乃
至第6図に示すようにこれらシフトロッド(17)、 
(17)、 (19)を端部から操作できるよう開口(
143)を閉塞する蓋体(20)の内面側に前記3つの
油圧シリンダ(TI )、 (’r、 )、 (T3 
)を設け、これらの油圧シリンダ(T3)、 (Tz)
、 (Ts)のピストンロッド(21)、 (21)、
 (21)の端部のブラケット(213)、 (213
)、 (213)と、シフトロッド(17)、 (17
)。
As shown in the figure, an opening (143) is formed in the mid case (14) to open the side of the hydraulic clutch (B), and the shifter is connected to two shifters (16) for main transmission. the rod (17), the end of (17), and
A shift rod (1) connected to a shifter (18) for the sub-transmission
The end of the shift rod (17) extends to this opening, as shown in FIGS. 4 to 6.
Openings (17) and (19) can be operated from the ends.
The three hydraulic cylinders (TI), ('r, ), (T3
), and these hydraulic cylinders (T3), (Tz)
, (Ts) piston rod (21), (21),
Bracket (213) at the end of (21), (213
), (213) and shift rods (17), (17
).

(19)の端部のブラケット(173)、 (173)
、 (193)とをピン(P)、 (P)、 (P)を
介して連結しである。
(19) end bracket (173), (173)
, (193) are connected via pins (P), (P), and (P).

因みに、前後進切換用のシフタ(24)と連結するシフ
トロッド(25)は操作レバー(L)と連係している。
Incidentally, the shift rod (25) connected to the shifter (24) for forward/reverse switching is linked to the operating lever (L).

尚、この蓋体(20)の外面側には前記圧力制御機構(
F)、切換弁(9)、変速操作制御弁(10)夫々を設
けてあり、油圧によって変速操作を行わない、所謂、マ
ニュアル変速型の伝動系を構成する場合には、開口(1
43)を形成していないミツドケースを用いるようにな
っている。
Note that the pressure control mechanism (
F), a switching valve (9), and a speed change operation control valve (10) are provided respectively, and when configuring a so-called manual transmission type transmission system in which the speed change operation is not performed by hydraulic pressure, the opening (1) is provided.
43) is used.

第7図に示すように前記油圧クラッチ(B)は、前記前
後進切換装置(C)の入力軸(22)に対して、油圧ピ
ストン(23)と複数の摩擦板(273)・・とを備え
たクラッチケース(23A)をニードルベアリング(2
6)、 (26)によって遊転支承すると共に、この入
力軸(22)に前記摩擦板(273)・・の間に配置さ
れる複数の摩擦板(27b)・・を支持するホルダ(2
8)をスプライン構造を介して外嵌し、更に、前記主変
速装置(A)の出力軸(29)にスプライン嵌合する伝
動部材(30)をクラッチケース(23A)に嵌合して
構成され、前記蓋体(20)に設けた切換弁(9)と、
クラッチケース(23A)の小径部に外嵌するジヨイン
ト部(31)との間に略直線的に、油圧クラッチ操作用
の管路(32)を形成しである。
As shown in FIG. 7, the hydraulic clutch (B) has a hydraulic piston (23) and a plurality of friction plates (273) connected to the input shaft (22) of the forward/reverse switching device (C). Clutch case (23A) with needle bearing (2
6) and (26), and also supports a plurality of friction plates (27b) arranged between the friction plates (273) on this input shaft (22).
8) is externally fitted through a spline structure, and a transmission member (30) that is spline-fitted to the output shaft (29) of the main transmission (A) is fitted to the clutch case (23A). , a switching valve (9) provided on the lid (20);
A conduit (32) for hydraulic clutch operation is formed approximately linearly between the joint part (31) that fits onto the small diameter part of the clutch case (23A).

〔別実施例〕[Another example]

本発明は上記実施例以外に例えば、弁機構を独立に構成
し、変速制御弁の操作系と連係して設けることも可能で
あり、又、弁機構はロータす弁型、チエツク弁型、スプ
ール弁型等様々に構成できる。
In addition to the above-described embodiments, the present invention also allows the valve mechanism to be configured independently and provided in conjunction with the operation system of the speed change control valve, and the valve mechanism may be of a rotor valve type, a check valve type, or a spool type. It can be configured in various ways such as valve type.

尚、特許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、該記入により本発明は添付図面の構造
に限定されるものではない。
Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明に係る変速操作構造の実施例を示し、第1
図は変速用の油圧回路図、第2図は伝動系を表す線図、
第3図は伝動ケースの側面図、第4図は油圧シリンダ、
蓋体等を表す斜視図、第5図は変速制御弁、蓋体等を表
す側面図、第6図は伝動ケース、蓋体等を表す断面図、
第7図は油圧クラッチの断面図である。 (8)・・・・・・油路、(9)・・・・・・切換弁、
(10)・・・・・・変速制御弁、(A)、 (C)、
 (D)・・・・・・変速装置、(B)・・・・・・油
圧クラッチ、(G)・・・・・・弁機構、(TI )、
 (T2 )、 (T3 )・・・・・・油圧アクチュ
エータ。
The drawings show an embodiment of the speed change operation structure according to the present invention, and the first embodiment
The figure is a hydraulic circuit diagram for gear shifting, Figure 2 is a diagram showing the transmission system,
Figure 3 is a side view of the transmission case, Figure 4 is the hydraulic cylinder,
FIG. 5 is a side view showing the speed change control valve, the lid, etc.; FIG. 6 is a sectional view showing the transmission case, the lid, etc.;
FIG. 7 is a sectional view of the hydraulic clutch. (8)... Oil passage, (9)... Switching valve,
(10)... Speed control valve, (A), (C),
(D)...Transmission device, (B)...Hydraulic clutch, (G)...Valve mechanism, (TI),
(T2), (T3)...Hydraulic actuator.

Claims (1)

【特許請求の範囲】[Claims]  走行伝動系に油圧クラッチ(B)を介装し、変速装置
(A)、(C)、(D)に変速用の油圧アクチュエータ
(T_1)、(T_2)、(T_3)を備え、この油圧
アクチュエータ(T_1)、(T_2)、(T_3)の
作動による変速操作の開始時に油圧クラッチ(B)を切
り操作し、変速操作の完了時に前記油圧クラッチ(B)
を入り操作すべく油圧アクチュエータ(T_1)、(T
_2)、(T_3)の作動と連係して操作されるパイロ
ット圧操作型の切換弁(9)を油圧クラッチ(B)に対
する油路(8)に介装して成る変速操作構造であって、
前記油圧アクチュエータ(T_1)、(T_2)、(T
_3)の作動開始に先立って前記切換弁(9)の操作を
開始すべく、前記油圧アクチュエータ(T_1)、(T
_2)、(T_3)を制御する変速制御弁(10)の操
作と連係して切換弁(9)に対するパイロット圧を制御
する弁機構(G)を有して成る変速操作構造。
A hydraulic clutch (B) is interposed in the travel transmission system, and the transmission devices (A), (C), and (D) are equipped with hydraulic actuators (T_1), (T_2), and (T_3) for shifting, and the hydraulic actuators (T_1), (T_2), and (T_3) are operated to disengage the hydraulic clutch (B) at the start of the shift operation, and when the shift operation is completed, the hydraulic clutch (B) is operated.
Hydraulic actuators (T_1), (T
_2) and (T_3) A shift operation structure comprising a pilot pressure-operated switching valve (9) that is operated in conjunction with the operation of (T_3) and interposed in an oil path (8) for a hydraulic clutch (B),
The hydraulic actuators (T_1), (T_2), (T
In order to start operating the switching valve (9) prior to the start of operation of the hydraulic actuators (T_1) and (T
A shift operation structure comprising a valve mechanism (G) that controls pilot pressure to a switching valve (9) in conjunction with operation of a shift control valve (10) that controls (T_3).
JP1018291A 1989-01-26 1989-01-27 Shift operation structure Pending JPH02199362A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1018291A JPH02199362A (en) 1989-01-27 1989-01-27 Shift operation structure
US07/423,765 US5012909A (en) 1989-01-26 1989-10-18 Change-speed control construction
KR1019890015185A KR920008000B1 (en) 1989-01-26 1989-10-20 Change speed control construction
DE3936116A DE3936116C2 (en) 1989-01-26 1989-10-30 Hydraulic control for a vehicle gear shift
FR8914323A FR2642016A1 (en) 1989-01-26 1989-10-31 CHANGE CONTROL FOR MOTOR VEHICLES, IN PARTICULAR AGRICULTURAL TRACTORS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1018291A JPH02199362A (en) 1989-01-27 1989-01-27 Shift operation structure

Publications (1)

Publication Number Publication Date
JPH02199362A true JPH02199362A (en) 1990-08-07

Family

ID=11967515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1018291A Pending JPH02199362A (en) 1989-01-26 1989-01-27 Shift operation structure

Country Status (1)

Country Link
JP (1) JPH02199362A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH061914U (en) * 1992-06-11 1994-01-14 三菱農機株式会社 Hydraulic shift operation device for traveling device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6418290A (en) * 1987-07-14 1989-01-23 Nikon Corp Laser generator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6418290A (en) * 1987-07-14 1989-01-23 Nikon Corp Laser generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH061914U (en) * 1992-06-11 1994-01-14 三菱農機株式会社 Hydraulic shift operation device for traveling device

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