JPS6227207U - - Google Patents
Info
- Publication number
- JPS6227207U JPS6227207U JP11858085U JP11858085U JPS6227207U JP S6227207 U JPS6227207 U JP S6227207U JP 11858085 U JP11858085 U JP 11858085U JP 11858085 U JP11858085 U JP 11858085U JP S6227207 U JPS6227207 U JP S6227207U
- Authority
- JP
- Japan
- Prior art keywords
- cushion mechanism
- lift cylinder
- mechanism according
- piston
- orifice
- 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
- 239000003921 oil Substances 0.000 claims 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
- Actuator (AREA)
Description
第１図及び第２図は本考案のクツシヨン機構の
実施例を示す縦断面図であり、第１図はピストン
が下降端に位置した状態を示し、第２図はピスト
ンが下降端に接近した状態（ピストンが所定量上
昇した状態）を示す。第３図は本考案の他の実施
例を示す縦断面図、第４図はさらに他の実施例を
示す縦断面図、第５図は従来のクツシヨン機構を
示す縦断面図である。
１……シリンダ本体、２……シリンダボトム、
３……ポート、４……縦孔、５……ボトム側シリ
ンダ室、６……ピストンバルブ、８……スプリン
グ、９……ピストン、１２……ストツパ、１３…
…オリフイス。
Figures 1 and 2 are longitudinal sectional views showing an embodiment of the cushion mechanism of the present invention, with Figure 1 showing the piston positioned at the lowering end, and Figure 2 showing the piston approaching the lowering end. Indicates the state (state in which the piston has risen by a predetermined amount). FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention, FIG. 4 is a longitudinal sectional view showing still another embodiment, and FIG. 5 is a longitudinal sectional view showing a conventional cushion mechanism. 1... Cylinder body, 2... Cylinder bottom,
3...Port, 4...Vertical hole, 5...Bottom side cylinder chamber, 6...Piston valve, 8...Spring, 9...Piston, 12...Stopper, 13...
...orifice chair.
Claims (1)
ための筒状に形成されたピストンバルブを、シリ
ンダボトムに形成された給排油路としての縦孔内
に上下動可能に所容するとともに、該ピストンバ
ルブをピストン下面に押付けるよう上向きに付勢
してボトム上面からストツパによる規制位置まで
突出可能となし、さらにピストンバルブには、ピ
ストン下面に当接した状態ではその筒孔とボトム
側シリンダ室との間の作動油流れを上下動に伴い
漸次増減するオリフイスを形成してなるリフトシ
リンダのクツシヨン機構。 (2) 前記オリフイスは、上下方向に複数段に形
成されている実用新案登録請求の範囲第１項記載
のリフトシリンダのクツシヨン機構。 (3) 前記オリフイスは、縦長のスリツトである
実用新案登録請求の範囲第１項記載のリフトシリ
ンダのクツシヨン機構。 (4) 前記オリフイスの径を、下段から上段に至
るに従つて順次大きく形成してなる実用新案登録
請求の範囲第２項記載のリフトシリンダのクツシ
ヨン機構。 (5) 前記ピストンは、ピストンバルブとの当接
面にゴムプレートを備えている実用新案登録請求
の範囲第１項記載のリフトシリンダのクツシヨン
機構。 (6) 前記ピストンのピストンバルブとの当接面
である下部形状をテーパ状の凹部に形成した実用
新案登録請求の範囲第１項記載のリフトシリンダ
のクツシヨン機構。[Scope of Claim for Utility Model Registration] (1) A cylindrical piston valve for controlling the oil supply and discharge passage in the bottom side cylinder chamber is installed in a vertical hole as an oil supply and discharge passage formed at the bottom of the cylinder. The piston valve is configured to be movable up and down, and is biased upward to press the piston valve against the lower surface of the piston so that it can protrude from the upper surface of the bottom to the regulated position by the stopper. In this state, the lift cylinder cushion mechanism forms an orifice that gradually increases or decreases the flow of hydraulic oil between the cylinder hole and the bottom cylinder chamber as it moves up and down. (2) The lift cylinder cushion mechanism according to claim 1, wherein the orifice is formed in multiple stages in the vertical direction. (3) The lift cylinder cushion mechanism according to claim 1, wherein the orifice is a vertically long slit. (4) The lift cylinder cushion mechanism according to claim 2, wherein the diameter of the orifice is gradually increased from the lower stage to the upper stage. (5) The lift cylinder cushion mechanism according to claim 1, wherein the piston is provided with a rubber plate on the contact surface with the piston valve. (6) The lift cylinder cushion mechanism according to claim 1, wherein the lower portion of the piston, which is the contact surface with the piston valve, is formed into a tapered recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11858085U JPS6227207U (en) | 1985-08-01 | 1985-08-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11858085U JPS6227207U (en) | 1985-08-01 | 1985-08-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6227207U true JPS6227207U (en) | 1987-02-19 |
Family
ID=31005165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11858085U Pending JPS6227207U (en) | 1985-08-01 | 1985-08-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6227207U (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 |
-
1985
- 1985-08-01 JP JP11858085U patent/JPS6227207U/ja active Pending
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 |
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