JPH0444502U - - Google Patents
Info
- Publication number
- JPH0444502U JPH0444502U JP8708290U JP8708290U JPH0444502U JP H0444502 U JPH0444502 U JP H0444502U JP 8708290 U JP8708290 U JP 8708290U JP 8708290 U JP8708290 U JP 8708290U JP H0444502 U JPH0444502 U JP H0444502U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic cylinder
- resistance
- confinement
- valve
- control valve
- 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
Links
- 230000035939 shock Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
Landscapes
- Fluid-Pressure Circuits (AREA)
- Fluid-Damping Devices (AREA)
Description
第１図は本考案の液圧シリンダのシヨツク軽減
装置の第１実施例を示すシリンダ断面および流体
回路図、第２図は本考案の第２実施例を示すシリ
ンダ断面および流体回路図、第３図は従来の液圧
シリンダにおけるシヨツク軽減手段を示すシリン
ダ断面および流体回路図である。
１１……コントロールバルブ、１２……液圧シ
リンダ、２４，２４ａ，２４ｂ，２５，２５ａ，
２５ｂ……管路、２８，２９……絞り弁、４１…
…閉込み圧発生部、４２……閉込み圧取出口、４
３……緩衝用パイロツト圧管路、４５，４６……
緩衝用パイツト圧作用部、５１，５２……ロジツ
クバルブ、７２，７３……ロジツクバルブ制御弁
、７４，７５……緩衝用パイロツト圧作用部。
FIG. 1 is a cylinder cross section and fluid circuit diagram showing a first embodiment of the shock reduction device for a hydraulic cylinder of the present invention, FIG. 2 is a cylinder cross section and fluid circuit diagram showing a second embodiment of the present invention, and FIG. The figure is a cylinder cross section and a fluid circuit diagram showing a shock reducing means in a conventional hydraulic cylinder. 11... Control valve, 12... Hydraulic cylinder, 24, 24a, 24b, 25, 25a,
25b...pipe line, 28, 29...throttle valve, 41...
... Confinement pressure generation part, 42 ... Confinement pressure outlet, 4
3... Buffer pilot pressure line, 45, 46...
Buffer pilot pressure acting section, 51, 52... logic valve, 72, 73... logic valve control valve, 74, 75... buffer pilot pressure acting section.
Claims (1)
圧シリンダのストロークエンドにおけるシヨツク
を軽減する装置において、 前記コントロールバルブと液圧シリンダとの間
の管路中に、絞り抵抗の有無を切換可能の絞り弁
が設けられ、 前記液圧シリンダのストロークエンドにおける
閉込み圧発生部に対し閉込み圧取出口が設けられ
、 この閉込み圧取出口から緩衝用パイロツト圧管
路が引出され、 この緩衝用パイロツト圧管路が、前記絞り抵抗
の有無を切換可能の絞り弁にあつてこの絞り弁を
絞り抵抗有りに切換える緩衝用パイロツト圧作用
部に連通された ことを特徴とする液圧シリンダのシヨツク軽減装
置。 (2) コントロールバルブによつて制御される液
圧シリンダのストロークエンドにおけるシヨツク
を軽減する装置において、 前記コントロールバルブと液圧シリンダとの間
の管路中に、絞り抵抗の有無を切換可能のロジツ
クバルブが設けられ、 前記液圧シリンダのストロークエンドにおける
閉込み圧発生部に対し閉込み圧取出口が設けられ
、 この閉込み圧取出口から緩衝用パイロツト圧管
路が引出され、 この緩衝用パイロツト圧管路が、前記ロジツク
バルブを絞り抵抗有りに制御するロジツクバルブ
制御弁の緩衝用パイロツト圧作用部に連通された ことを特徴とする液圧シリンダのシヨツク軽減装
置。[Claims for Utility Model Registration] (1) In a device for reducing shock at the stroke end of a hydraulic cylinder controlled by a control valve, a conduit between the control valve and the hydraulic cylinder is provided with a restriction. A throttle valve that can switch between resistance and non-resistance is provided, a confinement pressure outlet is provided for a confinement pressure generation section at the stroke end of the hydraulic cylinder, and a buffer pilot pressure pipe is connected from the confinement pressure outlet. The liquid is drawn out, and the buffer pilot pressure line is connected to a buffer pilot pressure acting part of the throttle valve capable of switching between the presence and absence of the throttle resistance and which switches the throttle valve to the presence of the throttle resistance. Shock reduction device for pressure cylinders. (2) In a device for reducing shock at the stroke end of a hydraulic cylinder controlled by a control valve, a logic valve is provided in a conduit between the control valve and the hydraulic cylinder and is capable of switching between presence and absence of throttling resistance. is provided, a confinement pressure outlet is provided for the confinement pressure generation section at the stroke end of the hydraulic cylinder, a buffer pilot pressure line is drawn out from the confinement pressure outlet, and the buffer pilot pressure line is drawn out from the confinement pressure outlet. is connected to a buffer pilot pressure acting part of a logic valve control valve that controls the logic valve with throttling resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8708290U JPH0444502U (en) | 1990-08-21 | 1990-08-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8708290U JPH0444502U (en) | 1990-08-21 | 1990-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0444502U true JPH0444502U (en) | 1992-04-15 |
Family
ID=31819142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8708290U Pending JPH0444502U (en) | 1990-08-21 | 1990-08-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0444502U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012246712A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo (Shi) Construction Machinery Co Ltd | Cab lifting device of construction machine |
-
1990
- 1990-08-21 JP JP8708290U patent/JPH0444502U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012246712A (en) * | 2011-05-30 | 2012-12-13 | Sumitomo (Shi) Construction Machinery Co Ltd | Cab lifting device of construction machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01133503U (en) | ||
| JPH0444502U (en) | ||
| JPH0444501U (en) | ||
| JPS6356304U (en) | ||
| JPH0291201U (en) | ||
| JPH0247252U (en) | ||
| JPH0421735U (en) | ||
| JPH0436108U (en) | ||
| JPS5859861U (en) | Decompression type antifreeze faucet | |
| JPH02110570U (en) | ||
| JPS62185990U (en) | ||
| JPS6386402U (en) | ||
| JPS6021007U (en) | Hydraulic cylinder stroke end shock absorber | |
| JPH0254904U (en) | ||
| JPH035769U (en) | ||
| JPS62147703U (en) | ||
| JPS61184102U (en) | ||
| JPH0341211U (en) | ||
| JPS61179303U (en) | ||
| JPH0391503U (en) | ||
| JPS5976659U (en) | Hydraulic excavator hydraulic circuit | |
| JPS6320534U (en) | ||
| JPH02134303U (en) | ||
| JPH0234803U (en) | ||
| JPH01108374U (en) |