JPH0423578U - - Google Patents
Info
- Publication number
- JPH0423578U JPH0423578U JP6575690U JP6575690U JPH0423578U JP H0423578 U JPH0423578 U JP H0423578U JP 6575690 U JP6575690 U JP 6575690U JP 6575690 U JP6575690 U JP 6575690U JP H0423578 U JPH0423578 U JP H0423578U
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- valve
- chamber
- pistons
- valve spool
- 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
- 239000012530 fluid Substances 0.000 claims 1
- 101150071927 AANAT gene Proteins 0.000 description 1
Description
第１図は本考案による液圧式動力舵取装置の一
実施例を示す縦断面図、第２図は同横断面図、第
３図は第２図に示したコントロールバルブの拡大
断面図である。
符号の説明、１０……液圧式動力舵取装置、１
１，１３……ハウジング、パワーピストン（パワ
ーシリンダ）、１５……ステアリングホイール、
２０……バルブピン、２１……バルブボデイ、２
１ｂ，２１ｄ，２１ｅ……環状溝、２２，２３…
…プラグ（端壁）、２２ａ，２３ａ……凹部、２
４……バルブスプール、３１，３２……反力ピス
トン、３１ｂ，３２ｂ……オリフイス、３１ｃ，
３２ｃ……第２のオリフイス、３３，３４……主
反力室、３５，３６……副反力室、３７，３８…
…反力スプリング、４１，４２……スナツプリン
グ、４５……可変オリフイス、４６……回路、４
３，４４……ダンパー室、Ａ……コントロールバ
ルブ、Ｐ……液圧ポンプ、Ｒ……リザーバ。
FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the hydraulic power steering device according to the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is an enlarged cross-sectional view of the control valve shown in FIG. 2. . Explanation of symbols, 10...Hydraulic power steering device, 1
1, 13...Housing, power piston (power cylinder), 15...Steering wheel,
20... Valve pin, 21... Valve body, 2
1b, 21d, 21e... annular groove, 22, 23...
...Plug (end wall), 22a, 23a... recess, 2
4... Valve spool, 31, 32... Reaction piston, 31b, 32b... Orifice, 31c,
32c... Second orifice, 33, 34... Main reaction force chamber, 35, 36... Sub-reaction force chamber, 37, 38...
...Reaction spring, 41, 42...Snat spring, 45...Variable orifice, 46...Circuit, 4
3,44...damper chamber, A...control valve, P...hydraulic pump, R...reservoir.
Claims (1)
じて移動するバルブピンにより作動させられてパ
ワーシリンダへの圧液給排を制御するコントロー
ルバルブが、バルブボデイ内に軸方向へ摺動自在
に組付けられて前記バルブピンにより押動される
バルブスプールと、このバルブスプールの両側に
組付けた対の反力ピストンを備えて、前記バルブ
スプールの各端部と前記各反力ピストン間に対の
主反力室を有するとともに、その両側に対の副反
力室を有し、これら両副反力室が車速に応じて絞
りが可変となる可変オリフイスを有する回路によ
り接続され、前記主反力室が前記バルブスプール
の動きに応じ液圧ポンプ又はリザーバと連通する
前記バルブボデイに設けた環状溝と連通し且つ前
記反力ピストンに設けたオリフイスを通して前記
副反力室と連通してなる液圧式動力舵取装置にお
いて、前記各反力ピストンの反バルブスプール側
端部を前記バルブボデイの両端にそれぞれ設けた
端壁の凹部に嵌挿してダンパー室を形成し、これ
ら各ダンパー室を前記各反力ピストンに設けた第
２のオリフイスを通して前記主反力室と副反力室
の少なくとも一方に連通させ、また前記各反力ピ
ストンを前記各端壁から遠ざかる移動時及びその
復帰時において前記バルブスプールと一体となる
ようにしたことを特徴とする液圧式動力舵取装置
。 A control valve that is actuated by a valve pin that moves in accordance with the steering force applied to the steering wheel to control the supply and discharge of pressurized fluid to the power cylinder is installed in the valve body so as to be able to freely slide in the axial direction, and is operated by the valve pin. A valve spool that is pushed and a pair of reaction force pistons assembled on both sides of the valve spool, and a pair of main reaction force chambers between each end of the valve spool and each of the reaction pistons. , has a pair of auxiliary reaction chambers on both sides thereof, and these auxiliary reaction chambers are connected by a circuit having a variable orifice whose aperture is variable depending on the vehicle speed, and the main reaction chamber is connected to the movement of the valve spool. In the hydraulic power steering device, the hydraulic power steering device communicates with an annular groove provided in the valve body that communicates with a hydraulic pump or a reservoir, and communicates with the auxiliary reaction chamber through an orifice provided in the reaction piston. A damper chamber is formed by fitting the opposite end of the reaction piston to a recess in an end wall provided at each end of the valve body, and each damper chamber is a second orifice provided in each reaction piston. through which the reaction pistons communicate with at least one of the main reaction force chamber and the auxiliary reaction force chamber, and each of the reaction force pistons is integrated with the valve spool when moving away from each end wall and when returning. Features a hydraulic power steering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6575690U JPH0423578U (en) | 1990-06-21 | 1990-06-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6575690U JPH0423578U (en) | 1990-06-21 | 1990-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423578U true JPH0423578U (en) | 1992-02-26 |
Family
ID=31597869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6575690U Pending JPH0423578U (en) | 1990-06-21 | 1990-06-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423578U (en) |
-
1990
- 1990-06-21 JP JP6575690U patent/JPH0423578U/ja active Pending
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