JPS6212465A - Power steering device - Google Patents

Power steering device

Info

Publication number
JPS6212465A
JPS6212465A JP15174685A JP15174685A JPS6212465A JP S6212465 A JPS6212465 A JP S6212465A JP 15174685 A JP15174685 A JP 15174685A JP 15174685 A JP15174685 A JP 15174685A JP S6212465 A JPS6212465 A JP S6212465A
Authority
JP
Japan
Prior art keywords
oil
pressure
chamber
port
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
Application number
JP15174685A
Other languages
Japanese (ja)
Inventor
Fumio Matsumoto
文男 松本
Kaoru Kusaka
草加 薫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Corp
Original Assignee
Showa Seisakusho Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Seisakusho Co Ltd filed Critical Showa Seisakusho Co Ltd
Priority to JP15174685A priority Critical patent/JPS6212465A/en
Publication of JPS6212465A publication Critical patent/JPS6212465A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make a steering force heavy or light in response to the size of a corner radius R by providing a control valve opened or closed in response to the magnitude of the pressure in a feed oil path to a power cylinder generated by a road reaction force at cornering. CONSTITUTION:When a steering wheel 21 is largely rotated during traveling and a corner radius is small, the pressure in an oil path 7 is increased in response to a road reaction force. Next, the pressure in a back pressure chamber 51, an oil path 62a, and an oil chamber 84 is increased, and a port 87 is blocked by a steel ball 85, thus a steering force is made light. When the steering wheel 21 is slightly rotated and a corner radius R is large, the pressure in the oil path 7 is decreased in response to a road reaction force, and the pressure in the back pressure chamber 51, oil path 62a, and oil chamber 84 is decreased, thus the steel ball 85 is pushed by the elastic force of a coil spring 92 to open the port 87. Then, a valve body 43 is moved toward the back pressure chamber 51 to release the pressure oil through a bypass path 55, and the pressure of the pressure oil fed to a power cylinder is decreased to make the steering force heavy.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は車両のパワーステアリング装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a power steering device for a vehicle.

(従来の技術及び発明が解決しようとする問題点) ハンドル操作によりコントロールパルプを作動しパワー
シリンダへオイルポンプの圧油を給排してパワーアシス
トを行うパワーステアリング装置は既に知られている。
(Prior Art and Problems to be Solved by the Invention) A power steering device is already known that performs power assist by operating a control pulp by operating a steering wheel to supply and discharge pressurized oil from an oil pump to a power cylinder.

しかしながら従来装置では、第5図に線図(B)で示す
ように、コーナ半径(R)の大小の如何に拘らず操舵力
は一定に軽く設定されている。
However, in the conventional device, as shown by the diagram (B) in FIG. 5, the steering force is set to be constant and light regardless of the size of the corner radius (R).

一方、人間工学的観点からすれば、コーナ半径(R)が
小さい場合には操舵力は軽く、コーナ半径(R)が大き
い場合にはマニュアル式ステアリング装置の特性(線図
C)に近づけて操舵力を重くすることが望ましい。
On the other hand, from an ergonomic point of view, when the corner radius (R) is small, the steering force is light, and when the corner radius (R) is large, the steering force is close to the characteristics of a manual steering device (diagram C). It is desirable to increase the force.

本発明は前記事情に鑑み案出されたものであって、本発
明の目的とする処は、コーナ半径(R)が爪Jr +、
s in Atw r4 kin 蛇−)v 九M /
  −I  J−皐ffl/D)J、(大きい場合には
操舵力を重くし得るパワーステアリング装置を提供する
にある。
The present invention has been devised in view of the above circumstances, and the object of the present invention is that the corner radius (R) is
s in Atwr4 kin Snake-)v 9M/
-I J-Ffl/D) J, To provide a power steering device that can increase the steering force when it is large.

(問題点を解決するための手段) 本発明は前記目的を達成するため、ポートを開閉する弁
体(85)を有し、ポートの一方の側に臨む油室(84
)の圧力がポートを閉塞する方向に弁体(85)に作用
する制御弁を設け、前記制御弁の油室(84)をオイル
ポンプとパワーシリンダを連通ずる油路(7)に接続す
ると共に、前記制御弁のポートの他方の側をオイルタン
ク側に接続し、コーナリング時に生ずる前記油路(7)
の圧力の高低に対応させて前記弁体(85)を所望量可
動させる弾発手段を設けたことを特徴とする。
(Means for Solving the Problems) In order to achieve the above object, the present invention has a valve body (85) for opening and closing the port, and an oil chamber (84) facing one side of the port.
) is provided to act on the valve body (85) in a direction in which the pressure of , the other side of the port of the control valve is connected to the oil tank side, and the oil passage (7) that occurs during cornering is connected to the oil tank side.
The present invention is characterized in that an elastic means is provided for moving the valve body (85) by a desired amount in response to the level of pressure.

(作用) コーナ半径(R)が小さい場合、路面反力に対応して油
路(7)、油室(84)の圧力は高まり、弁体(85)
でポートを閉塞し、操舵力を軽くする。
(Function) When the corner radius (R) is small, the pressure in the oil passage (7) and oil chamber (84) increases in response to the road reaction force, and the pressure in the valve body (85) increases.
to close the port and reduce the steering force.

コーナ半径(R)が大きい場合、路面反力に対応して油
路(7)、油室(84)の圧力は低く、弾発手段により
弁体(85)は油室(84)の圧力に対応して可動し、
ポートを開いて油路(7)の圧油を逃がし操舵力を重く
する。
When the corner radius (R) is large, the pressure in the oil passage (7) and the oil chamber (84) is low in response to the road reaction force, and the valve body (85) responds to the pressure in the oil chamber (84) by the elastic means. Moves accordingly,
The port is opened to release the pressure oil in the oil passage (7) and increase the steering force.

(実施例) 以下、本発明の一実施例を添付図面に従って説明する。(Example) An embodiment of the present invention will be described below with reference to the accompanying drawings.

第1図はパワーステアリング装置の油圧回路図を示す。FIG. 1 shows a hydraulic circuit diagram of a power steering device.

(1)はオイルポンプ、(2)はオイルタンク、(3)
はコントロールバルブ、(0はパワーシリンダで、オイ
ルポンプ(1)の吸込口(1a)とオイルタンク(2)
は油路(6)で接続し、オイルポンプ(1)の吐出口(
lb)とコントロールバルブ(3)は油路(7)で接続
する。
(1) is oil pump, (2) is oil tank, (3)
is the control valve, (0 is the power cylinder, the suction port (1a) of the oil pump (1) and the oil tank (2)
is connected to the oil passage (6), and the oil pump (1) discharge port (
lb) and the control valve (3) are connected through an oil passage (7).

パワーシリンダ(4)のピストン(11)で画成された
左右のシリンダ室(12)、(13)とコントロールバ
ルブ(3)は油路(14)、(15)で接続し、パワー
シリンダ(4)のピストンロッド(17)両端はタイロ
ッド等を介して左右の操向輪に接続され、また、ピスト
ンロッド(17)にはラック(1日)が形成されている
The left and right cylinder chambers (12), (13) defined by the piston (11) of the power cylinder (4) and the control valve (3) are connected by oil passages (14), (15), and the power cylinder (4) ), both ends of the piston rod (17) are connected to left and right steering wheels via tie rods, etc., and a rack (1) is formed on the piston rod (17).

(21)はステアリングホイールで、ステアリングホイ
ール(21)の操作によりビニオン軸(22)がラック
(18)上を転動して作動弁(23)の弁体(24)を
摺動し、弁体(24)の両側に画成された油室(2G)
 、(27)は、コントロールバルブ(3)の弁体(3
1)の両側に画成された油室(32) 、(33)に夫
々油路(34) 、(35)を介して連通されている。
(21) is a steering wheel, and when the steering wheel (21) is operated, the pinion shaft (22) rolls on the rack (18) and slides on the valve body (24) of the operating valve (23). Oil chamber (2G) defined on both sides of (24)
, (27) is the valve body (3) of the control valve (3).
It communicates with oil chambers (32) and (33) defined on both sides of 1) through oil passages (34) and (35), respectively.

而してステアリングホイール(21)の操作により弁体
(24)を摺動し、油室(2B) 、 (2?) 、 
(32) 、 (33)、油路(34) 、 (35)
を介してコントロールバルブ(3)の弁体(31)を摺
動させ、油路(14) 、(15)を介してオイルポン
プ(1)の圧油を左右のシリンダ室(12)、(13)
に給排してパワーアシストを行い、図中(36)はコン
トロールバルブ(3)、作動弁(23)とオイルタンク
(2)を接続する油路を示す。
Then, by operating the steering wheel (21), the valve body (24) is slid, and the oil chambers (2B), (2?),
(32), (33), oil passage (34), (35)
The valve body (31) of the control valve (3) is slid through the control valve (3), and the pressure oil of the oil pump (1) is supplied to the left and right cylinder chambers (12) and (13) through the oil passages (14) and (15). )
In the figure, (36) indicates an oil passage connecting the control valve (3), the operating valve (23), and the oil tank (2).

(41)は流量制御弁で、流量制御弁(41)は前記オ
イルポンプ(1)とコントロールバルブ(3)を接続す
る油路(7)に介設する。
(41) is a flow control valve, and the flow control valve (41) is interposed in the oil passage (7) connecting the oil pump (1) and the control valve (3).

前記流量制御弁(41)は弁体(43)を備え、流量制
イルポンプ(1)の吐出口(lb)に油路(47)を介
して接続し、また油室(45)と環状溝(4B)には油
路(7)を接続する。流量制御弁(41)の背圧室(5
1)はオリフィス(52a)を有する油路(52)を介
して前記環状溝(4B)に接続し、また背圧室(51)
はリリーフ弁(53)を有する油路(50を介してバイ
パス路(55)に接続し、油室(45)の圧力上昇時、
弁体(43)を背圧室(51)側へ移動させ、油室(4
5)の油をバイパス路(55)を介して逃がし、コント
ロールバルブ(3)、パワーシリンダ(4)側に供給す
る圧油の圧力を一定に保つ。
The flow rate control valve (41) includes a valve body (43), is connected to the discharge port (lb) of the flow rate control pump (1) via an oil passage (47), and is connected to an oil chamber (45) and an annular groove ( 4B) is connected to the oil passage (7). Back pressure chamber (5) of flow control valve (41)
1) is connected to the annular groove (4B) via an oil passage (52) having an orifice (52a), and also has a back pressure chamber (51).
is connected to the bypass passage (55) via an oil passage (50) having a relief valve (53), and when the pressure in the oil chamber (45) increases,
Move the valve body (43) to the back pressure chamber (51) side and open the oil chamber (4
5) is released through the bypass passage (55), and the pressure of the pressure oil supplied to the control valve (3) and power cylinder (4) side is kept constant.

(61)は車速応動弁で、車速応動弁(61)は流量制
御弁(41)の背圧室(51)とオイルタンク(2)を
接続する油路(62)に介設する。
(61) is a vehicle speed responsive valve, and the vehicle speed responsive valve (61) is interposed in an oil passage (62) connecting the back pressure chamber (51) of the flow control valve (41) and the oil tank (2).

次に第2図乃至第4図を参照して車速応動弁について説
明する。
Next, the vehicle speed responsive valve will be explained with reference to FIGS. 2 to 4.

第2図は車速応動弁、ファイナルカウンタギヤ部分の要
部断面側面図、第3図及び第4図は夫々第2図のm−I
[[ii、 IT−IT線断面図を示す。
Figure 2 is a cross-sectional side view of the main parts of the vehicle speed-responsive valve and final counter gear, and Figures 3 and 4 are m-I in Figure 2, respectively.
[[ii, shows a sectional view taken along the IT-IT line.

市オ陰這km/GI+)+斗;−5XI  ”/騰遂の
7w /キ】鵞。
Ichioin crawl km / GI +) + Do; -5

カウンタギヤ(64)に噛合し、車速に比例して回転す
る回転軸(65)を備え、回転軸(65)は下部ケース
(68)と上部ケース(67)で回転自在に支持する。
A rotating shaft (65) that meshes with a counter gear (64) and rotates in proportion to the vehicle speed is provided, and the rotating shaft (65) is rotatably supported by a lower case (68) and an upper case (67).

前記下部ケース(66)の上部には回転軸(65)とビ
ン(68)を介して結合し回転軸(65)と一体に回転
する回転部材(71)を取付け、回転部材(71)には
径方向に可動自在に複数の可動部材(72)・・・を組
込む。
A rotating member (71) is attached to the upper part of the lower case (66) and is connected to the rotating shaft (65) via a bottle (68) and rotates together with the rotating shaft (65). A plurality of movable members (72) are incorporated so as to be freely movable in the radial direction.

前記可動部材(72)の外端には球面状の係合部(73
)を形成し、コイルスプリング(74)により可動部材
(72)を径外方に付勢する。
A spherical engaging portion (73) is provided at the outer end of the movable member (72).
), and the movable member (72) is urged radially outward by the coil spring (74).

前記回転部材(71)は回転軸(B5)に遊嵌した被回
転部材(76)で覆う。
The rotating member (71) is covered with a rotated member (76) loosely fitted to the rotating shaft (B5).

前記被回転部材(7B)はピン(77)が立設された上
面部(78)と、上面部(78)から垂設され前記可動
部材(72)・・・の係合部(73)に臨む円筒部(7
9)とで構成する。
The rotated member (7B) has an upper surface portion (78) on which a pin (77) is erected, and an engaging portion (73) of the movable member (72) that is vertically disposed from the upper surface portion (78). The facing cylindrical part (7
9).

前記上部ケース(67)には前記ピン(77)の案内を
自在としだ長溝(81)を形成し、ピン(77)に係合
させてピストン体(82)を軸方向動自在に上部ケース
(67)に組込む。
A long groove (81) is formed in the upper case (67) to freely guide the pin (77), and is engaged with the pin (77) to allow the piston body (82) to freely move in the axial direction. 67).

上部ケース(67)には背圧室(51)側の油路(82
a)と、オイルタンク(2)側の油路(82b)を接続
する油路(83)、油室(84)を形成し、図中(82
0a)’。
The upper case (67) has an oil passage (82) on the back pressure chamber (51) side.
a) and the oil passage (82b) on the oil tank (2) side, forming an oil passage (83) and an oil chamber (84).
0a)'.

(620b)は油路(82a)、 (82b)のポート
を示す、そして油室(84)に装入した鋼球(85)を
ピストン体(82)の軸部(S2a)で軸方向に動かす
ことにより弁座(86)で画成されるポート(87)の
開口面積を調整し、止め栓(91)とビン(77)との
間に介設したコイルスプリング(92)及び止め栓(9
4)と鋼球(85)との間に介設したコイルスプリング
(95)により鋼球(85)を弁座(8B)に密接させ
、油路(83)を閉塞するように付勢する。
(620b) indicates the ports of the oil passages (82a) and (82b), and the steel ball (85) charged in the oil chamber (84) is moved in the axial direction by the shaft (S2a) of the piston body (82). By adjusting the opening area of the port (87) defined by the valve seat (86), the coil spring (92) and stopper (9) interposed between the stopper (91) and the bottle (77) are adjusted.
A coil spring (95) interposed between the steel ball (85) and the steel ball (85) brings the steel ball (85) into close contact with the valve seat (8B) and urges it to close the oil passage (83).

前記スプリング(74) 、(92) 、 (95)の
弾発力は回転部材(71)の所定回転速度以上において
、可動部材(72)の係合部(73)と被回転部材(7
6)の円筒部(79)との遠心力の作用による摩擦力に
より被回転部材(7B)をピストン体(82)、  ビ
ン(77)を介してスプリング(85)の弾発力に抗し
て回動するよう設定し、且つ、コーナリング時に生ずる
油路(7)の圧力の高低に対応させ、実施例では油路(
52) 、背圧室(51)、油路(82a)を介して油
路(7)に接続する油室(84)の圧力の高低に対応さ
せ、油室(84)の圧力が高い場合には油室(84)の
圧力及びコイルスプリング(95)の弾発力により鋼球
(85)でポート(87)を塞閉し、油室(84)の圧
力が低い場合にはコイルスプリング(92)の弾発力に
より鋼球(85)を弁座(8B)から離してボー) (
87)を開くように設定する。
The elastic force of the springs (74), (92), and (95) is applied to the engagement portion (73) of the movable member (72) and the rotated member (7) at a predetermined rotational speed or higher of the rotating member (71).
The rotational member (7B) is moved against the elastic force of the spring (85) through the piston body (82) and the bottle (77) by the frictional force due to the action of centrifugal force with the cylindrical part (79) of 6). The oil passage (7) is set to rotate and corresponds to the pressure level in the oil passage (7) that occurs during cornering.
52) The back pressure chamber (51) corresponds to the pressure level of the oil chamber (84) connected to the oil passage (7) via the oil passage (82a), and when the pressure of the oil chamber (84) is high, The steel ball (85) closes the port (87) using the pressure in the oil chamber (84) and the elastic force of the coil spring (95), and when the pressure in the oil chamber (84) is low, the coil spring (92) ) The steel ball (85) is separated from the valve seat (8B) by the elastic force of ) (
87).

従って実施例では車速応動弁(61)が、ポートを開閉
する弁体を有し、ポートの一方の側に臨む油室の圧力は
ポートを閉塞する方向に弁体に作用する制御弁(101
)を兼ねており、またコイルスプリング(74) 、 
(92)、 (95)が、油路(7)の圧力の高低に対
応させて弁体を所望量可動させる弾発手段(102)を
構成している。
Therefore, in the embodiment, the vehicle speed responsive valve (61) has a valve body that opens and closes the port, and the pressure in the oil chamber facing one side of the port acts on the valve body in the direction of closing the port.
), and also serves as a coil spring (74),
(92) and (95) constitute an elastic means (102) that moves the valve body by a desired amount in response to the level of pressure in the oil passage (7).

本実施例は前記のように構成したので、回転部材(71
)はファイナルカウンタギヤ(64)、回転軸(65)
を介して車速に比例して回転し、所定回転速度以上にお
いて、回転速度に応じて鋼球(85)を動かし、ポート
(87)を開いて油路(82a)、(83)、(62b
)を連通させる。そして背圧室(51)の油を油路(8
2a)、(83)、(Ei2b)を介して逃がし、背圧
室(51)の圧油の圧力を下げ、弁体(43)を背圧室
(51)側に移動させ、コントロールバルブ(3)、パ
ワーシリンダ(4)側へ供給する圧油をバイパス路(5
5)を介して逃がし、高速時における操舵を重くする。
Since this embodiment is configured as described above, the rotating member (71
) is the final counter gear (64), rotating shaft (65)
The steel ball (85) is moved in proportion to the vehicle speed at a predetermined rotational speed or higher, and the port (87) is opened to open the oil passages (82a), (83), and (62b).
) to communicate. Then, the oil in the back pressure chamber (51) is transferred to the oil path (8
2a), (83), and (Ei2b) to lower the pressure of the pressure oil in the back pressure chamber (51), move the valve body (43) to the back pressure chamber (51) side, and open the control valve (3). ), pressure oil is supplied to the power cylinder (4) through a bypass path (5
5) to make the steering heavier at high speeds.

更に走行中にステアリングホイール(21)を大きくき
ると、即ちコーナ半径(R)が小さい場合、路面反力に
対応して油路(7)の圧力は高まり、これに対応して背
圧室(51)、油路(82a) 、油室(84)の圧力
は高まり、鋼球(85)を弁座(87)側に付勢して鋼
球(85)でポート(87)を閉塞し、従ってコーナ半
径(R)が小さい場合の操舵力を軽くする。
Furthermore, when the steering wheel (21) is turned significantly while driving, that is, when the corner radius (R) is small, the pressure in the oil passage (7) increases in response to the road reaction force, and the back pressure chamber (51) increases in response to this. ), the oil passage (82a), and the oil chamber (84) increase in pressure, urging the steel ball (85) toward the valve seat (87) and closing the port (87) with the steel ball (85), thus To reduce the steering force when the corner radius (R) is small.

また、ステアリングホイール(21)を小さくきると、
即ちコーナ半径(R)が大きい場合、路面反力に対応し
て油路(7)の圧力は低く、これに対応して背圧室(5
1)、油路(62a) 、油室(84)の圧力は低く、
コイルスプリング(92)の弾発力により鋼球(85)
は弁座(86)から離れてポート(87)を開き、弁体
(43)を背圧室(51)側に移動させ、バイパス路(
55)から油を逃がしてコントロールバルブ(3)、パ
ワーシリンダ(4)側へ供給する圧油の圧力を下げ、コ
ーナ半径(R)が大きい場合の操舵力を重くする。
Also, if you make the steering wheel (21) smaller,
That is, when the corner radius (R) is large, the pressure in the oil passage (7) is low in response to the road reaction force, and the pressure in the back pressure chamber (5) is correspondingly low.
1) The pressure in the oil passage (62a) and oil chamber (84) is low;
Steel ball (85) due to the elastic force of coil spring (92)
moves away from the valve seat (86) to open the port (87), moves the valve body (43) to the back pressure chamber (51) side, and opens the bypass path (
55) and lowers the pressure of the pressure oil supplied to the control valve (3) and power cylinder (4) side, increasing the steering force when the corner radius (R) is large.

従って本実施例によれば、第5図に線図(A)で示すよ
うにコーナ半径(R)が小さい場合には操舵力を軽くし
、コーナ半径(R)が大きい場合には操舵力を重くする
操舵特性を得ることができる。
Therefore, according to this embodiment, as shown in the diagram (A) in FIG. 5, when the corner radius (R) is small, the steering force is reduced, and when the corner radius (R) is large, the steering force is reduced. It is possible to obtain steering characteristics that increase weight.

尚、実施例では車速応動弁(61)を利用して制御ブt
(101)を構成したが、制御弁(101)は車速応動
弁(61)を用いずに単独で構成してもよく、また油室
(84)は背圧室(51)に接続せずに油路(7)に直
接接続するようにしてもよい。
In the embodiment, the vehicle speed responsive valve (61) is used to control the control button t.
(101), the control valve (101) may be configured independently without using the vehicle speed responsive valve (61), and the oil chamber (84) may be configured without being connected to the back pressure chamber (51). You may make it connect directly to an oil path (7).

(発明の効果) 以上の説明で明らかなように本発明によれば、従来のパ
ワーステアリング装置に較ベコーナ半径(R)が小さい
場合には操舵力を軽く、コーナ半径(R)が大きい場合
には操舵力をマニュアル式ステアリング装置の特性に近
づけて重くし得る。
(Effects of the Invention) As is clear from the above description, according to the present invention, compared to conventional power steering devices, when the corner radius (R) is small, the steering force is light, and when the corner radius (R) is large, the steering force is reduced. The steering force can be made heavier and closer to the characteristics of a manual steering device.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はパワーステアリング装置の油圧回路図、第2図
は車速応動弁、ファイナルカウンタギヤ部分の要部断面
側面図、第3図及び第4図は夫々第2図の■−■線、I
V−rV線断面図、第5図は操舵力とコーナ半径(R)
の関係を示す線図である。 尚、図面中(1)はオイルポンプ、(2)はオイルタン
ク、(3)はコントロールバルブ、(4)はパワーシリ
ンダ、(7)、(E12)は油路、(41)は流量制御
弁、(6りは車速応動弁、(84)は油室、(85)は
鋼球、(92)、(95)はスプリングである。 特 許 出 願 人   株式会社昭和製作所代理人 
 弁理士   下  1) 容−即問   弁理士  
 大  橋  邦  部同   弁理士   小  山
    右同   弁理士   野  1)    茂
第2図 第5図
Figure 1 is a hydraulic circuit diagram of the power steering system, Figure 2 is a cross-sectional side view of the main parts of the vehicle speed response valve and final counter gear, and Figures 3 and 4 are the lines ■-■ and I in Figure 2, respectively.
V-rV line sectional view, Figure 5 shows steering force and corner radius (R)
FIG. In the drawing, (1) is the oil pump, (2) is the oil tank, (3) is the control valve, (4) is the power cylinder, (7) and (E12) are the oil passages, and (41) is the flow rate control valve. , (6 is the vehicle speed responsive valve, (84) is the oil chamber, (85) is the steel ball, (92) and (95) are the springs. Patent applicant Showa Seisakusho Co., Ltd. Agent
Patent Attorney Part 2 1) Yong-Immediate Question Patent Attorney
Kuni Ohashi, Patent Attorney Ujiko Koyama, Patent Attorney No. 1) Shigeru, Figure 2, Figure 5

Claims (1)

【特許請求の範囲】 ハンドル操作によりコントロールバルブを作動し、パワ
ーシリンダへオイルポンプの圧油を給排してパワーアシ
ストを行うパワーステアリング装置において、 ポートを開閉する弁体(85)を有し、ポートの一方の
側に臨む油室(84)の圧力がポートを閉塞する方向に
弁体(85)に作用する制御弁を設け、前記制御弁の油
室(84)をオイルポンプとパワーシリンダを連通する
油路(7)に接続すると共に、前記制御弁のポートの他
方の側をオイルタンク側に接続し、 コーナリング時に生ずる前記油路(7)の圧力の高低に
対応させて前記弁体(85)を所望量可動させる弾発手
段を設けたことを特徴とするパワーステアリング装置。
[Scope of Claims] A power steering device that operates a control valve by operating a handle to supply and discharge pressure oil from an oil pump to and from a power cylinder to perform power assist, the power steering device having a valve body (85) that opens and closes a port, A control valve is provided in which the pressure in the oil chamber (84) facing one side of the port acts on the valve body (85) in a direction to close the port, and the oil chamber (84) of the control valve is connected to the oil pump and power cylinder. The control valve is connected to the communicating oil passage (7), and the other side of the port of the control valve is connected to the oil tank side, and the valve body ( 85) A power steering device characterized in that it is provided with an elastic means for moving a desired amount.
JP15174685A 1985-07-10 1985-07-10 Power steering device Pending JPS6212465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15174685A JPS6212465A (en) 1985-07-10 1985-07-10 Power steering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15174685A JPS6212465A (en) 1985-07-10 1985-07-10 Power steering device

Publications (1)

Publication Number Publication Date
JPS6212465A true JPS6212465A (en) 1987-01-21

Family

ID=15525373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15174685A Pending JPS6212465A (en) 1985-07-10 1985-07-10 Power steering device

Country Status (1)

Country Link
JP (1) JPS6212465A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149677A (en) * 1981-03-10 1982-09-16 Nissan Motor Co Ltd Flow control valve for power steering device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149677A (en) * 1981-03-10 1982-09-16 Nissan Motor Co Ltd Flow control valve for power steering device

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