JP2022036748A5 - - Google Patents
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- JP2022036748A5 JP2022036748A5 JP2020141116A JP2020141116A JP2022036748A5 JP 2022036748 A5 JP2022036748 A5 JP 2022036748A5 JP 2020141116 A JP2020141116 A JP 2020141116A JP 2020141116 A JP2020141116 A JP 2020141116A JP 2022036748 A5 JP2022036748 A5 JP 2022036748A5
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- JP
- Japan
- Prior art keywords
- rod
- supply
- side chamber
- hole
- inner rod
- 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.)
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- 239000012530 fluid Substances 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005192 partition Methods 0.000 description 1
Description
本発明は、多段式流体圧シリンダが、シリンダチューブと、シリンダチューブの内周面に沿って摺動しシリンダチューブ内をロッド側室と反ロッド側室とに区画する外側ピストン部が端部に設けられた筒状の外側ロッド部材と、外側ロッド部材の内側にシリンダチューブの軸方向に移動自在に設けられる内側ロッド部材と、反ロッド側室に対して作動流体を給排する第１給排路と、ロッド側室に対して作動流体を給排する第２給排路と、を備え、内側ロッド部材は、内部に第２給排路が形成された内側ロッド部と、内側ロッド部の端部に設けられた環状の内側ピストン部と、を有し、内側ロッド部には、第２給排路から反ロッド側室へ向かう作動流体の流れのみを許容する逆流防止機構が設けられることを特徴とする。 In the present invention, a multi-stage fluid pressure cylinder has a cylinder tube and an outer piston portion at an end portion that slides along the inner peripheral surface of the cylinder tube and partitions the inside of the cylinder tube into a rod-side chamber and an anti-rod-side chamber. an inner rod member provided inside the outer rod member so as to be movable in the axial direction of the cylinder tube; a second supply/discharge path for supplying/discharging the working fluid to/from the rod-side chamber, and the inner rod member includes an inner rod portion in which the second supply/discharge path is formed, and an end portion of the inner rod portion. and the inner rod portion is provided with a backflow prevention mechanism that allows only the working fluid to flow from the second supply/discharge passage toward the anti-rod chamber.
また、本発明は、内側ロッド部には、軸方向に貫通して形成され一端が第２給排路に開口し他端が反ロッド側室に開口する貫通孔が設けられ、逆流防止機構は、貫通孔に設けられた逆止弁またはリリーフ弁であることを特徴とする。 Further, according to the present invention, the inner rod portion is provided with a through hole which is axially penetrated and has one end opening to the second supply/discharge passage and the other end opening to the anti-rod chamber, and the backflow prevention mechanism includes: It is characterized by being a check valve or a relief valve provided in the through hole.
また、本発明は、内側ロッド部には、軸方向に貫通して形成され一端が第２給排路に開口し他端が反ロッド側室に開口する貫通孔が設けられ、内側ロッド部材は、貫通孔に挿通され、内部に第１給排路が形成された管状部材をさらに有し、逆流防止機構は、管状部材の外周と貫通孔の内周との間に設けられたチェックシールであることを特徴とする。 Further, according to the present invention, the inner rod portion is provided with a through hole which is formed through the inner rod portion in the axial direction, one end of which opens to the second supply/discharge passage, and the other end which opens to the counter-rod-side chamber, and the inner rod member It further has a tubular member that is inserted through the through-hole and has a first supply/discharge path formed therein, and the backflow prevention mechanism is a check seal provided between the outer circumference of the tubular member and the inner circumference of the through-hole. It is characterized by
Claims (4)
前記シリンダチューブの内周面に沿って摺動し前記シリンダチューブ内をロッド側室と反ロッド側室とに区画する外側ピストン部が端部に設けられた筒状の外側ロッド部材と、
前記外側ロッド部材の内側に前記シリンダチューブの軸方向に移動自在に設けられる内側ロッド部材と、
前記反ロッド側室に対して作動流体を給排する第１給排路と、
前記ロッド側室に対して作動流体を給排する第２給排路と、を備え、
前記内側ロッド部材は、内部に前記第２給排路が形成された内側ロッド部と、前記内側ロッド部の端部に設けられた環状の内側ピストン部と、を有し、
前記内側ロッド部には、前記第２給排路から前記反ロッド側室へ向かう作動流体の流れのみを許容する逆流防止機構が設けられることを特徴とする多段式流体圧シリンダ。 a cylinder tube;
a cylindrical outer rod member having at its end an outer piston portion that slides along the inner peripheral surface of the cylinder tube and divides the inside of the cylinder tube into a rod-side chamber and an anti-rod-side chamber;
an inner rod member provided inside the outer rod member so as to be movable in the axial direction of the cylinder tube;
a first supply/discharge path for supplying/discharging working fluid to/from the anti-rod-side chamber;
a second supply/discharge path for supplying/discharging working fluid to/from the rod-side chamber;
The inner rod member has an inner rod portion inside which the second supply/discharge passage is formed, and an annular inner piston portion provided at an end portion of the inner rod portion,
The multi-stage fluid pressure cylinder , wherein the inner rod portion is provided with a backflow prevention mechanism that allows only a flow of the working fluid from the second supply/discharge passage toward the anti-rod side chamber.
前記逆流防止機構は、前記貫通孔に設けられた逆止弁またはリリーフ弁であることを特徴とする請求項１に記載の多段式流体圧シリンダ。 The inner rod portion is provided with a through hole which is formed to penetrate in the axial direction and has one end opening to the second supply/discharge passage and the other end opening to the anti-rod side chamber,
2. The multistage fluid pressure cylinder according to claim 1, wherein the backflow prevention mechanism is a check valve or a relief valve provided in the through hole.
複数の前記挿通孔のうちの１つは、前記貫通孔の一部を構成することを特徴とする請求項２に記載の多段式流体圧シリンダ。 The inner piston portion is formed with a plurality of insertion holes penetrating in the axial direction through which a fastening member used for assembling the inner piston portion to the inner rod portion can be inserted,
3. The multi-stage fluid pressure cylinder according to claim 2, wherein one of the plurality of through-holes forms part of the through-hole.
前記内側ロッド部材は、前記貫通孔に挿通され、内部に前記第１給排路が形成された管状部材をさらに有し、
前記逆流防止機構は、前記管状部材の外周と前記貫通孔の内周との間に設けられたことを特徴とする請求項１に記載のチェックシールである多段式流体圧シリンダ。 The inner rod portion is provided with a through hole which is formed to penetrate in the axial direction and has one end opening to the second supply/discharge passage and the other end opening to the anti-rod side chamber,
The inner rod member further has a tubular member inserted through the through hole and having the first supply/discharge path formed therein,
2. The multi-stage fluid pressure cylinder as a check seal according to claim 1, wherein the backflow prevention mechanism is provided between the outer circumference of the tubular member and the inner circumference of the through hole.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020141116A JP7177805B2 (en) | 2020-08-24 | 2020-08-24 | Multistage fluid pressure cylinder |
| CN202180052327.1A CN115943261A (en) | 2020-08-24 | 2021-08-12 | Multi-stage fluid pressure cylinder |
| PCT/JP2021/029752 WO2022044833A1 (en) | 2020-08-24 | 2021-08-12 | Multistage fluid pressure cylinder |
| GB2303134.7A GB2613494B (en) | 2020-08-24 | 2021-08-12 | Multistage fluid pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020141116A JP7177805B2 (en) | 2020-08-24 | 2020-08-24 | Multistage fluid pressure cylinder |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2022036748A JP2022036748A (en) | 2022-03-08 |
| JP2022036748A5 true JP2022036748A5 (en) | 2022-09-09 |
| JP7177805B2 JP7177805B2 (en) | 2022-11-24 |
Family
ID=80353160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020141116A Active JP7177805B2 (en) | 2020-08-24 | 2020-08-24 | Multistage fluid pressure cylinder |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7177805B2 (en) |
| CN (1) | CN115943261A (en) |
| GB (1) | GB2613494B (en) |
| WO (1) | WO2022044833A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023137714A (en) * | 2022-03-18 | 2023-09-29 | Ｋｙｂ株式会社 | fluid pressure cylinder |
| CN115059661B (en) * | 2022-07-02 | 2024-05-28 | 安徽工程大学 | Multistage extending hydraulic cylinder structure with travel locking function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09277814A (en) * | 1996-04-15 | 1997-10-28 | Kayaba Ind Co Ltd | Car height adjusting device |
| JP5610971B2 (en) * | 2010-10-19 | 2014-10-22 | 株式会社ショーワ | Trim and tilt device for marine propulsion equipment |
| JP6546746B2 (en) | 2015-02-10 | 2019-07-17 | Ｋｙｂ株式会社 | Fluid pressure cylinder |
| JP6646489B2 (en) | 2016-03-23 | 2020-02-14 | Ｋｙｂ株式会社 | Multi-stage fluid pressure cylinder |
-
2020
- 2020-08-24 JP JP2020141116A patent/JP7177805B2/en active Active
-
2021
- 2021-08-12 GB GB2303134.7A patent/GB2613494B/en active Active
- 2021-08-12 WO PCT/JP2021/029752 patent/WO2022044833A1/en active Application Filing
- 2021-08-12 CN CN202180052327.1A patent/CN115943261A/en active Pending
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