JPS5919179Y2 - Valve oil cushion device - Google Patents
Valve oil cushion deviceInfo
- Publication number
- JPS5919179Y2 JPS5919179Y2 JP2562580U JP2562580U JPS5919179Y2 JP S5919179 Y2 JPS5919179 Y2 JP S5919179Y2 JP 2562580 U JP2562580 U JP 2562580U JP 2562580 U JP2562580 U JP 2562580U JP S5919179 Y2 JPS5919179 Y2 JP S5919179Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- oil
- hollow
- oil cushion
- cylinder
- 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.)
- Expired
Links
Landscapes
- Valve Device For Special Equipments (AREA)
- Details Of Valves (AREA)
Description
【考案の詳細な説明】
本考案は中空ピストン撃発油圧駆動装置の改善に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in hollow piston percussion hydraulic drive devices.
排気弁の油圧駆動装置は動弁装置の簡略化、調整の簡易
化及び減音等の必要性から各機種で色々提案されている
が、本装置は中空ピストンタイプの装置に関するもので
ある。Various types of hydraulic drive devices for exhaust valves have been proposed in order to simplify the valve train, simplify adjustment, reduce noise, etc., but the present device relates to a hollow piston type device.
従来装置を第１図に示す。A conventional device is shown in FIG.
本装置は、カム側シリンダに収容されカム１により駆動
されるカム側ピストン２と排気弁側シリンダ８に収容さ
れ一端側は排気弁４に連結された排気弁側ピストン７と
、上記両シリンダを連絡する高圧油管３が設けられてい
る。This device consists of a cam side piston 2 housed in a cam side cylinder and driven by a cam 1, an exhaust valve side piston 7 housed in an exhaust valve side cylinder 8 and connected to an exhaust valve 4 at one end, and both cylinders. A communicating high pressure oil pipe 3 is provided.
排気弁側ピストン７は中空ピストンとなっており、その
特徴は作動流体の流出入方向がピストン７よりシリンダ
８の軸方向ではなく、それと直角方向円筒面より作動流
体が出入するようになっている。The exhaust valve side piston 7 is a hollow piston, and its feature is that the working fluid flows in and out from the piston 7 not in the axial direction of the cylinder 8, but from the cylindrical surface at right angles thereto. .
そのため、第２図に示すように、ピストン７は中空部９
と外周面との間に半径方向に複数個の穴１０を開けてい
る。Therefore, as shown in FIG.
A plurality of holes 10 are formed in the radial direction between the outer peripheral surface and the outer peripheral surface.
なお、中空部９はピストン７の端部に開口し、同端部は
排気側シリンダ８の密閉された内端部に対向している。Note that the hollow portion 9 opens at the end of the piston 7, and the same end faces the sealed inner end of the exhaust cylinder 8.
排気弁の閉弁時には、ばね６が排気弁側ピストン７を押
し上げる。When the exhaust valve is closed, the spring 6 pushes up the exhaust valve side piston 7.
このとき、排気弁４は排気弁側ピストン７と同じ速度で
排気弁弁座５に当たる。At this time, the exhaust valve 4 hits the exhaust valve seat 5 at the same speed as the exhaust valve side piston 7.
一般にこの衝突速度が早いと、衝撃により排気弁４また
は弁座５が破損することがあり、また騒音も大きくなる
という欠点がある。Generally, if the collision speed is high, the exhaust valve 4 or the valve seat 5 may be damaged due to the impact, and there is also a drawback that the noise becomes louder.
本考案の目的は上記欠点を排除できる中空ピストン撃発
油圧駆動装置を提供することであり、その特徴とすると
ころは、中空ピストン撃発油圧駆動装置において、対向
する中空ピストンの開口側端部と発側シリンダの内端部
との間に形成されたオイルクッション室、上記発側シリ
ンダの内端部にまたは上記ピストンの中空部に設けられ
た上記オイルクッション室と上記ピストンの中空部との
連通路を形成すると共に上記オイルクッション室より上
記ピストンの中空部への油の流入を阻止する逆止弁を備
えたことである。The purpose of the present invention is to provide a hollow piston percussion hydraulic drive device that can eliminate the above-mentioned drawbacks. an oil cushion chamber formed between the inner end of the cylinder, and a communication path between the oil cushion chamber and the hollow portion of the piston, which are provided at the inner end of the issuing cylinder or in the hollow portion of the piston. and a check valve that prevents oil from flowing into the hollow portion of the piston from the oil cushion chamber.
以下図面を参照して本考案による実施例につき説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第３図は本考案による１実施例の装置を装着した排気弁
側シリンダ及びピストンを示す断面図である。FIG. 3 is a sectional view showing an exhaust valve side cylinder and piston equipped with an embodiment of the device according to the present invention.
図において、１１は中空ピストンで、従来例のものと同
じで゛あり、１２はシリンダで゛ある。In the figure, 11 is a hollow piston, which is the same as in the conventional example, and 12 is a cylinder.
１３はオイルクッション室で゛、ピストン１１の中空部
が軸方向に開口する端部とこれに対向するシリンダ１２
の内端部との間に形成されている。Reference numeral 13 denotes an oil cushion chamber, which includes an end portion where the hollow portion of the piston 11 opens in the axial direction, and a cylinder 12 opposite thereto.
is formed between the inner end of the
１４は上記シリンダ１２の内端部に設けられたオイルク
ッション用逆止弁の弁座部で、その端部はピストン１１
の中空部開口内方へ突出し、中心部及び外周部に油路１
５．１６を形成している。Reference numeral 14 designates a valve seat portion of an oil cushion check valve provided at the inner end of the cylinder 12, and the end thereof is connected to the piston 11.
It protrudes inward from the hollow opening, with oil passages 1 in the center and outer periphery.
5.16 is formed.
１７はオイルクッション用逆止弁の弁体で、ばね押え１
９との間にばね１８を介装している。17 is the valve body of the check valve for the oil cushion, and the spring retainer 1
A spring 18 is interposed between the spring 18 and the spring 9.
上記構成の場合の作用について述べる。The operation in the case of the above configuration will be described.
排気弁閉弁時、即ちピストン１１がシリンダ１２の内端
部方向へ移動するとき、逆止弁により油路を閉塞された
オイルクッション室１３によりクッション作用が行われ
るので、第１図に示す排気弁４と弁座５との急激な衝突
を防止する。When the exhaust valve is closed, that is, when the piston 11 moves toward the inner end of the cylinder 12, a cushioning effect is performed by the oil cushion chamber 13 whose oil passage is closed by the check valve, so that the exhaust gas shown in FIG. To prevent sudden collision between the valve 4 and the valve seat 5.
なお、オイルクッション用逆止弁は排気弁開弁時に開き
、排気弁閉弁時には閉じて、オイルクッション室１３へ
の流入を助け、流出を防ぐ。Note that the oil cushion check valve opens when the exhaust valve is opened and closes when the exhaust valve is closed to help the oil flow into the oil cushion chamber 13 and prevent oil from flowing out.
上述のように本考案による場合は、中空ピストンを使用
した排気弁油圧駆動装置において、排気弁閉弁時にオイ
ルクッション作用を行うので、排気弁の着座速度を緩和
し、排気弁及び弁座の破損を防止できる効果がある。As described above, in the case of the present invention, in an exhaust valve hydraulic drive device using a hollow piston, an oil cushion effect is performed when the exhaust valve is closed, so the seating speed of the exhaust valve is relaxed and damage to the exhaust valve and valve seat is prevented. It has the effect of preventing
第４図は本考案による他の１実施例の装置を装着した排
気弁側シリンダ及びピストンを示す断面図である。FIG. 4 is a sectional view showing an exhaust valve side cylinder and piston equipped with another embodiment of the device according to the present invention.
図において、２１は中空ピストン、２２はシリンダ、２
３はオイルクッション室である。In the figure, 21 is a hollow piston, 22 is a cylinder, 2
3 is an oil cushion chamber.
前記した実施例と異なる点は、オイルクッション用逆止
弁をピストン２１の中空部内に設けたことである。The difference from the above-mentioned embodiments is that an oil cushion check valve is provided in the hollow portion of the piston 21.
２４はオイルクッション用逆止弁の弁座部で、２５は同
逆止弁の弁体、２６はばね、２７はばね押えである。24 is a valve seat portion of a check valve for oil cushion, 25 is a valve body of the same check valve, 26 is a spring, and 27 is a spring retainer.
上記構成の場合の作用、効果は前記した実施例の場合と
同じである。The functions and effects of the above configuration are the same as those of the embodiment described above.
第１図は従来の中空ピストン型排気弁油圧駆動装置を示
す説明図、第２図は第１図の排気弁側シリンダ及びピス
トンを拡大して示す断面図、第３図は本考案による１実
施例の装置を装着した排気弁側シリンダ及びピストンを
示す断面図、第４図は本考案による他の実施例の装置を
装着した排気弁側シリンダ及びピストンを示す断面図で
ある。
２・・・・・・カム側ピストン、３・・・・・・高圧管
、４・・・・・・排気弁、５・・・・・・弁座、７．１
１．２１・・・・・・排気弁側ピストン、８．１２．２
２・・・・・・排気弁側シリンダ、９・・・・・・中空
部、１３，２３・・・・・・オイルクッション室、１４
．２４・・・・・・逆止弁の弁座部、１７．２５・・・
・・・逆止弁の弁体。Fig. 1 is an explanatory diagram showing a conventional hollow piston type exhaust valve hydraulic drive device, Fig. 2 is an enlarged sectional view showing the exhaust valve side cylinder and piston of Fig. 1, and Fig. 3 is an example of an implementation according to the present invention. FIG. 4 is a cross-sectional view showing an exhaust valve-side cylinder and piston equipped with an example device. FIG. 4 is a cross-sectional view showing an exhaust valve-side cylinder and piston equipped with another embodiment of the device according to the present invention. 2...Cam side piston, 3...High pressure pipe, 4...Exhaust valve, 5...Valve seat, 7.1
1.21...Exhaust valve side piston, 8.12.2
2... Exhaust valve side cylinder, 9... Hollow part, 13, 23... Oil cushion chamber, 14
．． 24...Valve seat of check valve, 17.25...
...Valve body of check valve.
Claims (1)
ダと、一端部を弁に連結され他端部に中空部が開口する
中空ピストンの上記開口側端部に対向する内端部を形成
して上記ピストンを収容する発側シリンダと、上記両シ
リンダの連絡油路とを有する中空ピストン撃発油圧駆動
装置において、対向する上記ピストンの開口側端部と上
記発側シリンダの内端部との間に形成されるオイルクッ
ション室、上記発側シリンダの内端部にまたは上記ピス
トンの中空部に設けられ上記オイルクッション室と上記
ピストンの中空部との連通路を形成すると共に上記オイ
ルクッション室より上記ピストンの中空部への油の流入
を阻止する逆止弁を備えたことを特徴とする弁才イルク
ッション装置。A cam-side cylinder housing a piston driven by a cam, and a hollow piston having one end connected to a valve and a hollow piston opening at the other end, the inner end facing the opening end being formed to form the piston. In the hollow piston percussion hydraulic drive device, the hollow piston percussion hydraulic drive device has an originating cylinder accommodating the cylinder, and a communication oil passage between the two cylinders. an oil cushion chamber provided at the inner end of the delivery side cylinder or in the hollow part of the piston, forming a communication path between the oil cushion chamber and the hollow part of the piston, and forming a communication path between the oil cushion chamber and the hollow part of the piston; An oil cushion device characterized by comprising a check valve that prevents oil from flowing into the oil cushion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2562580U JPS5919179Y2 (en) | 1980-03-01 | 1980-03-01 | Valve oil cushion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2562580U JPS5919179Y2 (en) | 1980-03-01 | 1980-03-01 | Valve oil cushion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56129678U JPS56129678U (en) | 1981-10-02 |
| JPS5919179Y2 true JPS5919179Y2 (en) | 1984-06-02 |
Family
ID=29621657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2562580U Expired JPS5919179Y2 (en) | 1980-03-01 | 1980-03-01 | Valve oil cushion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919179Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1869294B1 (en) * | 2005-04-11 | 2013-11-06 | Jacobs Vehicle Systems, Inc. | Valve actuation system with valve seating control |
-
1980
- 1980-03-01 JP JP2562580U patent/JPS5919179Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56129678U (en) | 1981-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01134018A (en) | Valve system for internal combustion engine | |
| KR970065971A (en) | Hydraulic lash adjuster | |
| JPS54121314A (en) | Valve lift varying mechanism for internal combustion engine | |
| JPS5862305A (en) | Hydraulic lifter | |
| JPS5815707A (en) | Suction valve or exhuast valve used for cylinder-head of internal combustion engine | |
| US4387675A (en) | Engine valve actuating mechanism having a hydraulic fulcrum lifting device | |
| JPS5919179Y2 (en) | Valve oil cushion device | |
| US4635593A (en) | Hydraulic valve lifter | |
| JPH05263954A (en) | Pressure regulating valve | |
| US4976230A (en) | Valve mechanism, preferably for an internal combustion engine, having pressure medium supply passage | |
| US3139078A (en) | Horizontal hydraulic valve lifter | |
| US4470382A (en) | Valve lash adjuster for an internal combustion engine | |
| JPS6346643Y2 (en) | ||
| EP0990773A3 (en) | Hydraulic lash adjuster with pressure relief check valve | |
| JPS622372Y2 (en) | ||
| JPH10169614A (en) | Cushion device for fluid pressure cylinder | |
| WO1996028659A1 (en) | Piston pump | |
| JP2505727Y2 (en) | Silent piezoelectric pump | |
| JPH0221562Y2 (en) | ||
| JPH0131766Y2 (en) | ||
| JPS6039441Y2 (en) | Sealed hydraulic lifter | |
| JPH0324809Y2 (en) | ||
| JPH0318645Y2 (en) | ||
| JPS5833202Y2 (en) | Hydraulic tappet in internal combustion engine valve train | |
| JPS5999015A (en) | Exhaust valve device for internal-combustion engine |