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JPH05332328A - Three-position operation type fluid pressure actuator - Google Patents

Three-position operation type fluid pressure actuator

Info

Publication number
JPH05332328A
JPH05332328A JP16368492A JP16368492A JPH05332328A JP H05332328 A JPH05332328 A JP H05332328A JP 16368492 A JP16368492 A JP 16368492A JP 16368492 A JP16368492 A JP 16368492A JP H05332328 A JPH05332328 A JP H05332328A
Authority
JP
Japan
Prior art keywords
piston
stepped
cylinder
rod
end wall
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
JP16368492A
Other languages
Japanese (ja)
Inventor
Isamu Yamaguchi
勇 山口
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.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors 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 Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP16368492A priority Critical patent/JPH05332328A/en
Publication of JPH05332328A publication Critical patent/JPH05332328A/en
Pending legal-status Critical Current

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  • Actuator (AREA)

Abstract

PURPOSE:To shorten a size in the axial direction and to stop a rod at required three positions. CONSTITUTION:Inside a stepped piston 7 fitted into a stepped cylinder 10, a cylinder 17 opened to a small diameter end face of the stepped piston 7 is formed. A rod 2 is connected to a piston 19 fitted into the cylinder 17. The rod 2 is protruded to the outside penetrating an end wall 7a of the stepped piston 7 and a large diameter end wall 4 of the stepped cylinder 10. A spring 16 is interposed between the end wall 7a of the stepped piston 7 and the piston 19. When pressurized fluid is fed to both end chambers 13, 15 of the stepped cylinder 10, only the piston 19 is moved to the inside of the cylinder 17 and stopped at a neutral position.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は車両のドラム型永久磁石
式リターダの磁石支持環の駆動や、変速機の変速操作に
好適な、3位置動作型流体圧アクチユエータに関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-position operation type fluid pressure actuator suitable for driving a magnet support ring of a drum permanent magnet type retarder of a vehicle and gear shifting operation of a transmission.

【0002】[0002]

【従来の技術】実開昭58-67105号公報に開示される変速
機用3位置動作型油圧アクチユエータでは、主アクチユ
エータのシリンダにピストンを嵌挿し、両端室の一方へ
圧油を供給し、ピストンに結合したロツドを往復動する
ようにし、ロツドを中間の中立位置で停止させるため
に、ロツドは副アクチユエータのシリンダに嵌挿した自
由ピストンに当接するようになつている。上述の油圧ア
クチユエータでは、ロツドの中立位置から片側へのスト
ロークをsとすると、主アクチユエータの長さ(軸方向
寸法)はピストンの寸法を無視しても2s、副アクチユ
エータの長さも2sとなり、全長は4s以上になる。
2. Description of the Related Art In a three-position hydraulic actuator for a transmission disclosed in Japanese Utility Model Laid-Open No. 58-67105, a piston is fitted into a cylinder of a main actuator to supply pressure oil to one of both end chambers. In order to reciprocate the rod coupled to the rod and to stop the rod at an intermediate neutral position, the rod abuts a free piston fitted in the cylinder of the subactuator. In the above hydraulic actuator, if the stroke from the neutral position of the rod to one side is s, the length of the main actuator (axial dimension) will be 2 s even if the piston dimension is ignored, and the length of the sub-actuator will be 2 s. Is 4s or more.

【0003】図3に示す3位置動作型油圧アクチユエー
タでも同様のことが言える。すなわち、小径シリンダ2
2に嵌挿したピストン23にロツド21を結合して外部
へ突出し、またピストン23と一体の小径ピストン23
aを大径シリンダ25へ突出し、かつ大径シリンダ25
に嵌挿した自由ピストン24に嵌挿してなる。両端室2
6,27へ圧油を供給すると、ロツド21は自由ピスト
ン24が段部28に当接する図示の中立位置で停止す
る。中立位置から室26へ圧油を供給し、室27の油を
解放すると、ピストン23によりピストン24が押さ
れ、小径ピストン23aが大径シリンダ25の端壁に当
接したところで停止する。逆に、室27へ圧油を供給
し、室26の油を解放すると、ピストン23a,23が
左方へ移動し、小径シリンダ22の端壁に当接したとこ
ろで停止する。
The same applies to the three-position operation type hydraulic actuator shown in FIG. That is, the small diameter cylinder 2
The rod 21 is connected to the piston 23 fitted into the rod 2 and protrudes to the outside, and the small-diameter piston 23 is integrated with the piston 23.
a to the large-diameter cylinder 25, and the large-diameter cylinder 25
It is fitted in the free piston 24 fitted in. Both end chamber 2
When pressure oil is supplied to 6, 27, the rod 21 stops at the neutral position shown in the drawing in which the free piston 24 abuts the step 28. When pressure oil is supplied to the chamber 26 from the neutral position and the oil in the chamber 27 is released, the piston 24 is pushed by the piston 23 and stops when the small diameter piston 23a comes into contact with the end wall of the large diameter cylinder 25. On the contrary, when pressure oil is supplied to the chamber 27 and the oil in the chamber 26 is released, the pistons 23a, 23 move leftward and stop when they contact the end wall of the small diameter cylinder 22.

【0004】上述の油圧アクチユエータでも、ロツド2
1の中立位置からのストロークsに対して、各ピストン
23,23aの長さa,bはストロークsよりも長く、
自由ピストン24は小径ピストン23aよりも少し短く
しないと、ピストン23が小径シリンダ22から外れて
大径シリンダ25の内部へ突出したり、小径ピストン2
3aが自由ピストン24から外れたりし、動作の円滑性
を欠くことになる。要するに、図3に示す油圧アクチユ
エータでも、全長はロツド21のストロークsの4倍以
上になり、変速機に搭載するには種々の困難をもたら
す。
In the above-mentioned hydraulic actuator as well, the rod 2
With respect to the stroke s from the neutral position of 1, the lengths a and b of the pistons 23 and 23a are longer than the stroke s,
Unless the free piston 24 is made slightly shorter than the small diameter piston 23a, the piston 23 is disengaged from the small diameter cylinder 22 and protrudes into the large diameter cylinder 25, or the small diameter piston 2
3a may come off the free piston 24, and the smoothness of the operation may be lost. In short, even in the hydraulic actuator shown in FIG. 3, the total length is four times the stroke s of the rod 21 or more, which causes various difficulties in mounting it on the transmission.

【0005】[0005]

【発明が解決しようとする課題】本発明の目的は上述の
問題に鑑み、軸方向寸法が短く、所要の3位置でロツド
を停止できる、3位置動作型流体圧アクチユエータを提
供することにある。
SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a three-position operation type hydraulic actuator which has a short axial dimension and can stop the rod at the required three positions.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に、本発明の構成は段付シリンダに嵌挿した段付ピスト
ンの内部に、段付ピストンの小径端面へ開口するシリン
ダを形成し、該シリンダに嵌挿したピストンにロツドを
結合し、該ロツドを段付ピストンの端壁と段付シリンダ
の大径端壁を貫通して外部へ突出し、段付ピストンの端
壁とピストンとの間にばねを介装したものである。
In order to achieve the above object, the structure of the present invention has a stepped piston fitted into a stepped cylinder, in which a cylinder opening to a small diameter end face of the stepped piston is formed. A rod is connected to the piston fitted in the cylinder, the rod penetrates the end wall of the stepped piston and the large-diameter end wall of the stepped cylinder, and protrudes to the outside, and the rod is inserted between the end wall of the stepped piston and the piston. It has a spring in it.

【0007】[0007]

【作用】本発明によれば、段付ピストンの内部にシリン
ダを形成し、該シリンダにピストンを嵌挿してなるか
ら、軸方向寸法を大幅に短縮でき、ロツドは段付ピスト
ンの内部のシリンダにおけるピストンの動作と、段付シ
リンダにおける段付ピストンの動作との組合せにより3
位置で停止する。
According to the present invention, since the cylinder is formed inside the stepped piston and the piston is fitted and inserted into the cylinder, the axial dimension can be greatly shortened, and the rod can be installed in the cylinder inside the stepped piston. 3 due to the combination of the movement of the piston and the movement of the stepped piston in the stepped cylinder
Stop at position.

【0008】[0008]

【実施例】図1はロツド2が最右端位置にある時の、本
発明による3位置動作型流体圧アクチユエータの側面断
面図である。3位置動作型流体圧アクチユエータは段付
シリンダ10に、大径シリンダ6と小径シリンダ6aを
形成され、大径シリンダ6は端壁4により閉鎖される。
段付シリンダ10に嵌挿される段付ピストン7は、シー
ル9を外嵌された大径部と、シール9aを外嵌された小
径部とを備えている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a side cross-sectional view of a three position hydraulic actuator according to the present invention when rod 2 is in the rightmost position. In the three-position operation type fluid pressure actuator, a large diameter cylinder 6 and a small diameter cylinder 6a are formed in a stepped cylinder 10, and the large diameter cylinder 6 is closed by an end wall 4.
The stepped piston 7 that is fitted and inserted into the stepped cylinder 10 includes a large diameter portion to which the seal 9 is fitted, and a small diameter portion to which the seal 9a is fitted.

【0009】段付ピストン7は内部に、小径端面へ開口
するシリンダ17を形成される。シリンダ17はシール
18を外嵌されたピストン19を嵌挿される。シリンダ
17の内部は大気圧室20を区画され、シリンダ17の
端壁7aとピストン19との間にばね16を介装され
る。ばね16は大きなばね力をピストン19に及ぼし、
できるだけ短く縮むように、円錐形に巻かれたコイルば
ねからなる。ピストン19に一端を結合されたロツド2
は、段付ピストン7の端壁7aのシール8により封封さ
れた軸穴と、端壁4のシール3により軸封された軸穴と
を経て外部へ突出される。
Inside the stepped piston 7, a cylinder 17 is formed which opens to the small diameter end face. The cylinder 17 has a piston 19 fitted with a seal 18 fitted therein. An atmospheric pressure chamber 20 is defined inside the cylinder 17, and a spring 16 is interposed between the end wall 7 a of the cylinder 17 and the piston 19. The spring 16 exerts a large spring force on the piston 19,
It consists of a coil spring wound in a conical shape so that it contracts as short as possible. Rod 2 with one end connected to piston 19
Is projected to the outside through the shaft hole sealed by the seal 8 on the end wall 7a of the stepped piston 7 and the shaft hole sealed by the seal 3 on the end wall 4.

【0010】こうして、大径シリンダ6の端壁4と段付
ピストン7との間に室13が区画され、小径シリンダ6
aの端壁12とピストン19との間に室15が区画され
る。室20は段付ピストン7に設けた径方向の通路14
aと、段付シリンダ10に設けた大気孔14を経て大気
へ開放可能である。
In this way, the chamber 13 is defined between the end wall 4 of the large diameter cylinder 6 and the stepped piston 7, and the small diameter cylinder 6
A chamber 15 is defined between the end wall 12 of a and the piston 19. The chamber 20 has a radial passage 14 provided in the stepped piston 7.
It is possible to open to the atmosphere through a and the atmospheric hole 14 provided in the stepped cylinder 10.

【0011】ポート13aから室13へ加圧流体を供給
し、室15の流体を解放すると、図1に示すように、ロ
ツド2のピストン19は段付ピストン7が段付シリンダ
10の段部6bに当接する位置S1で停止する。ここで、
ポート15aから室15へ加圧流体を供給すると、段付
ピストン7は図示の位置にあつて、ピストン19がばね
16の力に抗して左方へ移動する。したがつて、室15
への給油量に対応する位置S2で、ピストン19とロツド
2が停止する。シリンダ17にストツパを設けておけ
ば、ピストン19はストツパに当つたところで停止す
る。
When pressurized fluid is supplied from the port 13a to the chamber 13 and the fluid in the chamber 15 is released, the piston 19 of the rod 2 is the stepped piston 7 and the stepped portion 6b of the stepped cylinder 10 as shown in FIG. It stops at the position S1 where it abuts against. here,
When the pressurized fluid is supplied to the chamber 15 from the port 15a, the stepped piston 7 is at the position shown in the figure, and the piston 19 moves to the left against the force of the spring 16. Therefore, room 15
The piston 19 and the rod 2 stop at the position S2 corresponding to the amount of oil supplied to the piston. If the cylinder 17 is provided with a stopper, the piston 19 stops when it hits the stopper.

【0012】次いで、室13の流体を解放し、室15へ
加圧流体を供給すると、段付ピストン7とピストン19
との相対位置は変らず、両者が一緒に左方へ移動し、ピ
ストン19とロツド2は段付ピストン7が緩衝部材5に
当接する位置S3で停止する。この時、段付ピストン7と
ピストン19はストロークsだけ作動する。ロツド2を
最左端位置S3から中立位置S2と最右端位置S1へ駆動する
には、上述の場合と逆の順に加圧流体を供給・排出す
る。位置S2から位置S1への動作はばね16の力により達
せられる。
Next, when the fluid in the chamber 13 is released and pressurized fluid is supplied to the chamber 15, the stepped piston 7 and the piston 19 are released.
The relative position with respect to and does not change, and both move to the left together, and the piston 19 and the rod 2 stop at the position S3 where the stepped piston 7 contacts the buffer member 5. At this time, the stepped piston 7 and the piston 19 operate for the stroke s. To drive the rod 2 from the leftmost position S3 to the neutral position S2 and the rightmost position S1, the pressurized fluid is supplied / discharged in the reverse order of the above case. The movement from position S2 to position S1 is achieved by the force of spring 16.

【0013】[0013]

【発明の効果】本発明は上述のように、段付シリンダに
嵌挿した段付ピストンの内部に、段付ピストンの小径端
面へ開口するシリンダを形成し、該シリンダに嵌挿した
ピストンにロツドを結合し、該ロツドを段付ピストンの
端壁と段付シリンダの大径端壁を貫通して外部へ突出
し、段付ピストンの端壁とピストンとの間にばねを介装
したものであり、ロツドの動作位置は段付シリンダの内
部での段付ピストンの動作と、段付ピストンの内部での
ピストンの動作との組合せにより達せられるので、流体
圧アクチユエータの全長が従来例の約半分に短縮され、
重量を低減し、各ピストンを駆動する加圧流体の消費量
を節減できる。
As described above, according to the present invention, inside the stepped piston fitted into the stepped cylinder, a cylinder opening to the small diameter end face of the stepped piston is formed, and the rod fitted to the piston fitted into the cylinder is formed. And the rod penetrates through the end wall of the stepped piston and the large diameter end wall of the stepped cylinder and projects outward, and a spring is interposed between the end wall of the stepped piston and the piston. Since the operating position of the rod can be reached by the combination of the operation of the stepped piston inside the stepped cylinder and the operation of the piston inside the stepped piston, the total length of the fluid pressure actuator is about half that of the conventional example. Shortened,
Weight can be reduced and consumption of pressurized fluid for driving each piston can be reduced.

【0014】2個の電磁弁により加圧流体を2つのポー
トに対し供給・排出するだけで、ロツドを3位置に停止
できるので、部品点数などの点でコスト節減に役立つ。
Since the rod can be stopped at the three positions only by supplying / discharging the pressurized fluid to / from the two ports with the two solenoid valves, the cost can be saved in terms of the number of parts.

【図面の簡単な説明】[Brief description of drawings]

【図1】ロツドが最右端位置にある時の、本発明に係る
3位置動作型流体圧アクチユエータの側面断面図であ
る。
FIG. 1 is a side cross-sectional view of a three-position actuated fluid pressure actuator according to the present invention when the rod is at the rightmost position.

【図2】同ロツドが最左端位置にある時の、3位置動作
型流体圧アクチユエータの側面断面図である。
FIG. 2 is a side sectional view of a three-position operation type fluid pressure actuator when the rod is at the leftmost position.

【図3】従来の3位置動作型油圧アクチユエータの側面
断面図である。
FIG. 3 is a side sectional view of a conventional three-position operation type hydraulic actuator.

【符号の説明】[Explanation of symbols]

2:ロツド 4,12:端壁 7:段付ピストン 1
0:段付シリンダ 16:ばね 17:シリンダ 1
9:ピストン
2: Rod 4, 12: End wall 7: Stepped piston 1
0: Stepped cylinder 16: Spring 17: Cylinder 1
9: Piston

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】段付シリンダに嵌挿した段付ピストンの内
部に、段付ピストンの小径端面へ開口するシリンダを形
成し、該シリンダに嵌挿したピストンにロツドを結合
し、該ロツドを段付ピストンの端壁と段付シリンダの大
径端壁を貫通して外部へ突出し、段付ピストンの端壁と
ピストンとの間にばねを介装したことを特徴とする、3
位置動作型流体圧アクチユエータ。
1. A stepped piston fitted in a stepped cylinder is provided with a cylinder opening to a small diameter end face of the stepped piston, and a rod is connected to the piston fitted in the cylinder, and the rod is stepped. 3. A spring is interposed between the end wall of the stepped piston and the piston, penetrating through the end wall of the stepped piston and the large diameter end wall of the stepped cylinder, and protruding outward.
Position operated fluid pressure actuator.
JP16368492A 1992-05-29 1992-05-29 Three-position operation type fluid pressure actuator Pending JPH05332328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16368492A JPH05332328A (en) 1992-05-29 1992-05-29 Three-position operation type fluid pressure actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16368492A JPH05332328A (en) 1992-05-29 1992-05-29 Three-position operation type fluid pressure actuator

Publications (1)

Publication Number Publication Date
JPH05332328A true JPH05332328A (en) 1993-12-14

Family

ID=15778638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16368492A Pending JPH05332328A (en) 1992-05-29 1992-05-29 Three-position operation type fluid pressure actuator

Country Status (1)

Country Link
JP (1) JPH05332328A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014126087A1 (en) 2013-02-12 2014-08-21 新日鐵住金株式会社 3-position operating actuator and permanent-magnet eddy-current deceleration device
EP3037679A1 (en) * 2014-12-23 2016-06-29 Samson Aktiengesellschaft Fluid-operated actuator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014126087A1 (en) 2013-02-12 2014-08-21 新日鐵住金株式会社 3-position operating actuator and permanent-magnet eddy-current deceleration device
JP2014152877A (en) * 2013-02-12 2014-08-25 Nippon Steel & Sumitomo Metal Three-position operating actuator and permanent magnet-type eddy current reduction gear
KR20150038112A (en) 2013-02-12 2015-04-08 신닛테츠스미킨 카부시키카이샤 3-position operating actuator and permanent-magnet eddy-current deceleration device
US9476435B2 (en) 2013-02-12 2016-10-25 Nippon Steel & Sumitomo Metal Corporation 3-position operating actuator and permanent-magnet eddy-current deceleration device
EP3037679A1 (en) * 2014-12-23 2016-06-29 Samson Aktiengesellschaft Fluid-operated actuator

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