JPH0484299U - - Google Patents
Info
- Publication number
- JPH0484299U JPH0484299U JP12863390U JP12863390U JPH0484299U JP H0484299 U JPH0484299 U JP H0484299U JP 12863390 U JP12863390 U JP 12863390U JP 12863390 U JP12863390 U JP 12863390U JP H0484299 U JPH0484299 U JP H0484299U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- throttle
- movable body
- lift cylinder
- flow path
- 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.)
- Granted
Links
Landscapes
- Forklifts And Lifting Vehicles (AREA)
- Actuator (AREA)
Description
第１図は本考案の第１実施例に係るリフトシリ
ンダの断面図、第２図は第２実施例に係るリフト
シリンダの断面図、第３図は第３実施例に係るリ
フトシリンダの断面図、第４図乃至第６図は第４
実施例に係るリフトシリンダのそれぞれ異なつた
状態での断面図、第７図は可動体の変形例を示す
断面図、第８図は第７図で示す可動体の斜視図、
第９図及び第１０図は従来例に係るリフトシリン
ダのそれぞれ異なつた状態での断面図、第１１図
はリフトシリンダの断面図である。
１……リフトシリンダ、２……シリンダチユー
ブ、３……ピストン、５……油室、７……可動体
、１０……第２開口、１１……第３開口、１４…
…第５開口、２０……流量制御弁、２５……第７
開口、４０……上部開口、４１……中間部開口、
４２……下部開口、４３……上端部開口。
FIG. 1 is a cross-sectional view of a lift cylinder according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of a lift cylinder according to a second embodiment, and FIG. 3 is a cross-sectional view of a lift cylinder according to a third embodiment. , Figures 4 to 6 are
7 is a sectional view showing a modified example of the movable body; FIG. 8 is a perspective view of the movable body shown in FIG. 7;
FIGS. 9 and 10 are sectional views of a conventional lift cylinder in different states, and FIG. 11 is a sectional view of the lift cylinder. DESCRIPTION OF SYMBOLS 1... Lift cylinder, 2... Cylinder tube, 3... Piston, 5... Oil chamber, 7... Movable body, 10... Second opening, 11... Third opening, 14...
...Fifth opening, 20...Flow rate control valve, 25...Seventh
Opening, 40... Upper opening, 41... Middle opening,
42... lower opening, 43... upper end opening.
Claims (1)
在かつ上方に弾性的に付勢されるように設けられ
、この可動体に設けられる絞り流路を介し、ピス
トンの下方の油室と下降速度制御用流量制御弁と
が接続され、その絞り流路の絞り度が、ピストン
により可動体が押し下げられることで増大される
リフトシリンダの下降制御装置において、前記絞
り流路が第１絞り流路と第２絞り流路とを有し、
その第１絞り流路の絞り度は、リフトシリンダか
らの排出油流量が前記流量制御弁の制御流量より
も大きくなると、可動体を下降させるように設定
され、この可動体の下降により第１絞り流路は閉
鎖され、その第２絞り流路の絞り度は、第１絞り
流路が閉鎖されてリフトシリンダからの排出油流
量が前記流量制御弁の制御流量よりも少ない場合
に、可動体の上昇を規制するように設定されてい
ることを特徴とするリフトシリンダの下降制御装
置。 A movable body is provided at the bottom of the cylinder tube so as to be able to move vertically and be elastically biased upward. In a lowering control device for a lift cylinder, which is connected to a flow rate control valve and in which the degree of restriction of the throttle channel is increased by pushing down a movable body by a piston, the throttle channel is connected to a first throttle channel and a second throttle channel. It has a throttle flow path,
The degree of restriction of the first throttle channel is set such that when the discharge oil flow rate from the lift cylinder becomes larger than the control flow rate of the flow rate control valve, the movable body is lowered, and the lowering of the movable body causes the first throttle to be lowered. The flow path is closed, and the degree of restriction of the second throttle flow path is such that when the first throttle flow path is closed and the discharge oil flow rate from the lift cylinder is less than the control flow rate of the flow control valve, the flow rate of the movable body is A lowering control device for a lift cylinder, characterized in that the lowering control device is configured to restrict the upward movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990128633U JP2509263Y2 (en) | 1990-11-29 | 1990-11-29 | Lift cylinder lowering control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990128633U JP2509263Y2 (en) | 1990-11-29 | 1990-11-29 | Lift cylinder lowering control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0484299U true JPH0484299U (en) | 1992-07-22 |
| JP2509263Y2 JP2509263Y2 (en) | 1996-08-28 |
Family
ID=31876083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990128633U Expired - Fee Related JP2509263Y2 (en) | 1990-11-29 | 1990-11-29 | Lift cylinder lowering control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2509263Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012025567A (en) * | 2010-07-27 | 2012-02-09 | Nippon Yusoki Co Ltd | Lift cylinder and forklift with the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030316U (en) * | 1983-08-04 | 1985-03-01 | 川崎重工業株式会社 | General-purpose engine muffler |
| JPS6216480U (en) * | 1985-07-16 | 1987-01-31 |
-
1990
- 1990-11-29 JP JP1990128633U patent/JP2509263Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030316U (en) * | 1983-08-04 | 1985-03-01 | 川崎重工業株式会社 | General-purpose engine muffler |
| JPS6216480U (en) * | 1985-07-16 | 1987-01-31 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012025567A (en) * | 2010-07-27 | 2012-02-09 | Nippon Yusoki Co Ltd | Lift cylinder and forklift with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2509263Y2 (en) | 1996-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |