JPS6212468A - Power steering device - Google Patents

Power steering device

Info

Publication number
JPS6212468A
JPS6212468A JP15174785A JP15174785A JPS6212468A JP S6212468 A JPS6212468 A JP S6212468A JP 15174785 A JP15174785 A JP 15174785A JP 15174785 A JP15174785 A JP 15174785A JP S6212468 A JPS6212468 A JP S6212468A
Authority
JP
Japan
Prior art keywords
oil
control valve
valve
pressure
response
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
JP15174785A
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 JP15174785A priority Critical patent/JPS6212468A/en
Publication of JPS6212468A publication Critical patent/JPS6212468A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain adequate road resistance feeling in response to a car speed during traveling by connecting a control valve opened in response to a car speed during the advance travel and backward travel of a car to release the oil in an oil path to the oil path communicating a power cylinder and an oil pump. CONSTITUTION:During the advance travel or backward travel, a rotary member 71 is rotated in proportion to a car speed via a rotary shaft 65. Next at a predetermined rotating speed or more, a valve stem 82 is moved in the axial direction via a pin 72 in response to the rotating speed. Then, a recessed groove is moved, and a steel ball 116 is moved via a small steel ball to communicate oil paths 62a, 62b. The oil in a back pressure chamber 51 is released to an oil tank, the pressure of the pressure oil in the back pressure chamber 51 is decreased, a valve body 43 is moved toward the back pressure chamber 51, the pressure oil fed to a control valve 3 and a power cylinder 4 is released via a bypass path 55 to decrease the pressure of the pressure oil, thus a steering force is made heavy in response to the car speed during the advance travel and backward travel, and adequate road resistance feeling is obtained.

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) 車速応動弁等を用いて高速時における操舵を重くし、高
速走行中に適切な路面抵抗感覚を運転者+−M  ! 
 f  #g  M  、&  n     −’y 
 =  71+  ’//f’ 床柱署 1斗 猛 h
 n)方式のものが提案されている。
(Prior art) A vehicle speed-responsive valve or the like is used to make the steering heavier at high speeds, giving the driver an appropriate sense of road resistance while driving at high speeds!
f #g M , & n −'y
= 71+ '//f' Tobashira Station 1to Takeshi h
n) method has been proposed.

(発明が解決しようとする問題点) しかしながら従来のパワーステアリング装置では前進時
における車速に応じてのみ操舵を重くするように構成し
ており、そのため後進時における車速に応じて適切な路
面抵抗感覚を得ることができない不具合があった。
(Problem to be Solved by the Invention) However, conventional power steering devices are configured to increase the steering force only according to the vehicle speed when traveling forward, and therefore do not provide an appropriate sense of road resistance depending on the vehicle speed when traveling backwards. There was a problem that I couldn't get it.

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、前進時及び後進時における車速に
応じて適切な路面抵抗感覚を得ることができるパワース
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 an object of the present invention is to provide a power steering device that can obtain an appropriate feeling of road resistance depending on the vehicle speed when moving forward and backward. There is something to do.

(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、パワーシリンダとオ
イルポンプを連通する油路(7)に、車両の前進時及び
後進時における車速に応じて開き該油路(7)の油を逃
がす制御弁を接続し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 an oil passage (7) communicating between the power cylinder and the oil pump that opens in accordance with the vehicle speed when the vehicle is moving forward and backward. It is characterized in that a control valve is connected to release the oil in the passage (7).

(作用) 車両の前進時及び後進時における車速に応じて、パワー
シリンダに供給する圧油を制御弁を介して逃がし、圧油
の圧力を下げて操舵を重くする。
(Function) Pressure oil supplied to the power cylinder is released via the control valve depending on the vehicle speed when the vehicle is moving forward or backward, lowering the pressure of the pressure oil and making the steering heavier.

(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、(4)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(8)で接続し、オイルポンプ(1)の吐出口
(1b)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 a control valve, (4) is a power cylinder, which connects the suction port (1a) of the oil pump (1) and the oil tank (2).
) are connected through an oil passage (8), and the discharge port (1b) of the oil pump (1) 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(18)が形成されてい
る。
The left and right cylinder chambers (12) and (13) defined by the piston (11) of the power cylinder (4) and the control valve (3) are connected through oil passages (14) and (15), ), both ends of the piston rod (17) are connected to left and right steering wheels via tie rods or the like, and a rack (18) 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)の操作によりピニオン軸(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(2B)
、(27)は、コントロールバルブ(3)の弁体(31
)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 (2B) defined on both sides of (24)
, (27) is the valve body (31) of the control valve (3).
) are communicated with oil chambers (32) and (33) defined on both sides of the cylinder via 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)、(27)、(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(3B)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), (27), and (32) are opened.
, (33), the valve body (31) of the control valve (3) via the oil passages (34) and (35), and the oil passage (
Power assist is performed by supplying and discharging pressure oil from the oil pump (1) to the left and right cylinder chambers (12) and (13) via (14) and (15), and (3B) in the figure is the control valve (
3) shows the oil passage connecting 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
御弁(41)の油室(45)と弁体(43)の環状溝(
4B)はオイルポンプ(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(4
6)には油路(7)を接続する。流量制御弁(41)の
背圧室(51)はオリフィス(52a)を有する油路(
52)を介して前記環状溝(46)に接続し、また背圧
室(51)はリリーフ弁(53)を有する油路(54)
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(45)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), and an oil chamber (45) of the flow rate control valve (41) and an annular groove (43) of the valve body (43).
4B) is an oil path (
47), and also connects the oil chamber (45) and the annular groove (4
6) is connected to the oil passage (7). The back pressure chamber (51) of the flow control valve (41) is an oil passage (51) having an orifice (52a).
52) to the annular groove (46), and the back pressure chamber (51) is connected to an oil passage (54) having a relief valve (53).
When the pressure in the oil chamber (45) increases, the valve body (43) is moved to the back pressure chamber (51) side, and the oil in the oil chamber (45) is connected to the bypass path (55) through the bypass path (55). 55), control valve (3), and power cylinder (4).
) side to keep the pressure of the pressure oil 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
線、IT−ff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 respectively
A cross-sectional view taken along the IT-ff line is shown.

車速応動弁(61)はミッション機構のファイナルカウ
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(6
6)と上部ケース(67)で回゛転自在に支持する。
The vehicle speed responsive valve (61) meshes with the final counter gear (64) of the transmission mechanism and includes a rotating shaft (65) that rotates in proportion to the vehicle speed, and the rotating shaft (65) is connected to the lower case (6
6) and an upper case (67) to rotatably support it.

前記下部ケース(6B)の上部には回転軸(65)とピ
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(7りを取付け、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 (7) is attached to the upper part of the lower case (6B) and is connected to the rotating shaft (65) via a pin (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(85)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 (85).

前記被回転部材(76)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 (76) 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).

前記ピン(77)は上部ケース(67)の案内溝(81
)に挿通し、またピン(77)は上部ケース(67)に
軸方向動自在に組込んだ弁軸(82)の長溝(83)に
挿入し、回転軸(65)を中心としたピン(77)の回
動により弁軸(82)を軸方自動させる。
The pin (77) is inserted into the guide groove (81) of the upper case (67).
), and the pin (77) is inserted into the long groove (83) of the valve shaft (82), which is installed in the upper case (67) so as to be freely movable in the axial direction, and the pin ( 77) causes the valve shaft (82) to move automatically in the axial direction.

前記弁軸(82)は止め栓(85)、上部ケース(67
)の段部(86)、ばね受(87)、(8B) 、スト
ッパ(91)、コイルスプリング(92)を介して弁軸
(82)を中立位置に付勢す、る。
The valve stem (82) includes a stopper (85) and an upper case (67).
), the valve stem (82) is biased to the neutral position via the step portion (86), spring bearings (87), (8B), stopper (91), and coil spring (92).

弁軸(82)の中間部にはV字状の凹溝(93)を形成
し、前記凹溝(83)に臨ませて弁軸(82)の直交方
向から上部ケース(67)に油孔(95) 、(9El
)を形成し、油孔(95)、(9B)は夫々止め栓(9
7)、(9B)で閉塞する。
A V-shaped groove (93) is formed in the middle part of the valve stem (82), and an oil hole is formed in the upper case (67) from the direction perpendicular to the valve stem (82) facing the groove (83). (95) , (9El
), and the oil holes (95) and (9B) are each formed with a stopper (9
7) and (9B).

前記一方の油孔(95)は油路(111)を介して前記
油路(82a)に、他方の油孔(86)は油路(112
)を介して前記油路(ll12b)に夫々接続する。
One of the oil holes (95) is connected to the oil path (82a) via the oil path (111), and the other oil hole (86) is connected to the oil path (112a) through the oil path (111).
) are respectively connected to the oil passages (ll12b).

そして前記各油孔(95) 、(9B)にコイルスプリ
ング(114)により付勢して小径状の鋼球(115)
 、(115)と大径状の鋼球(11&)を組込み、大
径状の鋼球(11B)を弁座(117)に密接させボー
) (118)を閉塞するように付勢する。
Then, each of the oil holes (95) and (9B) is biased by a coil spring (114) to form a small diameter steel ball (115).
, (115) and a large-diameter steel ball (11&) are assembled, and the large-diameter steel ball (11B) is brought into close contact with the valve seat (117) and biased to close the bow (118).

前記スプリング(74) A32)の弾発力は回転部材
(71)の正転及び逆転時における所定回転速度以上に
おいて、可動部材(72)の係合部(73)と円筒部(
79)との遠心力の作用による摩擦力により被回転部材
(76)をスプリング(92)の弾発力に抗して回動さ
せ、弁軸(82)を軸方自動するよう構成する。
The elastic force of the spring (74) A32) causes the engagement portion (73) of the movable member (72) and the cylindrical portion (
The rotating member (76) is rotated against the elastic force of the spring (92) by the frictional force due to the centrifugal force between the valve shaft (82) and the valve shaft (82).

本実施例は前記のように構成したので、前進時或いは後
進時、回転部材(7りはファイナルカウンタギヤ(84
)、回転軸(65)を介して車速に比例して回転し、前
進時及び後進時における所定回転速度以上において、回
転速度に応じてピン(77)を介して弁軸(82)を軸
方自動させ、凹溝(93)が移動して、小径状の鋼球(
115)、(115)を介して大径状の鋼球(tte)
を弁軸(82)の径外方へ動かし、ボート(118)、
(118)を開き、油路(111)、(112)を油孔
(95) 、(9B)を介して連通させる。
Since this embodiment is configured as described above, when moving forward or backward, the rotating member (7 is the final counter gear (84)
), rotates in proportion to the vehicle speed via the rotating shaft (65), and rotates the valve stem (82) in the axial direction via the pin (77) according to the rotational speed at a predetermined rotational speed or higher when moving forward or backward. Automatically, the concave groove (93) moves and the small diameter steel ball (
115), a large diameter steel ball (tte) via (115)
the boat (118),
(118) is opened and the oil passages (111) and (112) are communicated through the oil holes (95) and (9B).

そして背圧室(51)(7)油を油路(82a)、(1
11) 、油孔(95)、(9B) 、油路(112)
 、C62b)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(55)を介して逃
がし、圧油の圧力を下げて前進時及び後進時における車
速に応じて操舵を重くする。
Then, the oil in the back pressure chambers (51) and (7) is transferred to the oil passages (82a) and (1).
11), oil hole (95), (9B), oil passage (112)
, C62b) 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 release the control valve (3) and power cylinder (
4) The pressure oil supplied to the side is released through the bypass path (55), and the pressure of the pressure oil is lowered to make the steering heavier depending on the vehicle speed when moving forward and when moving backward.

尚、実施例では車両の前進時及び後進時における車速に
応じて開き、油路(7)の油を逃がす制御弁(121)
を流量制御弁(41)と車速応動弁(61)とにより構
成した場合について説明したが、制御弁(121)はこ
れに限らず、例えば車速応動弁(B1)単独で構成して
もよく、この場合には油路(111)を直接油路(7)
に接続し、油路(7)の油を車速応動(F(81)を介
して逃がせばよい。また車速応動弁(61)は実施例の
ものに限らず任意である。
In addition, in the embodiment, a control valve (121) opens depending on the vehicle speed when the vehicle is moving forward or backward to release oil from the oil passage (7).
Although the case has been described in which the control valve (121) is configured by the flow rate control valve (41) and the vehicle speed responsive valve (61), the control valve (121) is not limited to this, and may be configured by the vehicle speed responsive valve (B1) alone, for example. In this case, the oil passage (111) is directly connected to the oil passage (7).
The vehicle speed responsive valve (61) is not limited to the one in the embodiment and may be optional.

(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、前進時及
び後進時における車速に応じて適切な路面抵抗感覚を得
ることができる。
(Effects of the Invention) As is clear from the above description, according to the present invention, it is possible to obtain an appropriate sense of road resistance depending on the vehicle speed when moving forward and when moving backward.

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

m1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、ファイナル力ウンタギ夫々第2図の[−
III線、IT−rV線断面図である。 尚、図面中(1)はオイルポンプ、(2)はオイルタン
ク、(3)コントロールバルブ、(4)はパワーシリン
ダ、(21)はステアリングホイール、(41)は流量
制御弁、(61)は車速応動弁、 (121)は制御弁
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 −部間
     弁理士    大   橋   邦   部
同   弁理士   小  山    右同   弁理
士   野  1)   茂第2図
Figure m1 is the hydraulic circuit diagram of the power steering system, Figure 2 is the vehicle speed response valve, final power untagey, and [-
It is a sectional view taken along line III and IT-rV. In the drawings, (1) is the oil pump, (2) is the oil tank, (3) is the control valve, (4) is the power cylinder, (21) is the steering wheel, (41) is the flow control valve, and (61) is the Vehicle speed responsive valve (121) is a control valve. Patent Applicant Showa Seisakusho Co., Ltd. Patent Attorney 2 1) Yong-Buma Patent Attorney Kuni Ohashi Patent Attorney Udo Koyama Patent Attorney No 1) Shigeru Figure 2

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、 パワーシリンダとオイルポンプを連通する油路(7)に
、車両の前進時及び後進時における車速に応じて開き該
油路(7)の油を逃がす制御弁を接続したことを特徴と
するパワーステアリング装置。
[Scope of Claims] In a power steering device that performs power assist by supplying and discharging pressure oil from an oil pump to and from a power cylinder by operating a control valve by operating a handle, an oil passage (7) that communicates between the power cylinder and the oil pump is provided. A power steering device characterized in that a control valve is connected to the oil passageway (7) which opens in accordance with the vehicle speed when the vehicle is moving forward or backward.
JP15174785A 1985-07-10 1985-07-10 Power steering device Pending JPS6212468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15174785A JPS6212468A (en) 1985-07-10 1985-07-10 Power steering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15174785A JPS6212468A (en) 1985-07-10 1985-07-10 Power steering device

Publications (1)

Publication Number Publication Date
JPS6212468A true JPS6212468A (en) 1987-01-21

Family

ID=15525395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15174785A Pending JPS6212468A (en) 1985-07-10 1985-07-10 Power steering device

Country Status (1)

Country Link
JP (1) JPS6212468A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5389134A (en) * 1977-01-17 1978-08-05 Kayaba Ind Co Ltd Power steering device
JPS5393555A (en) * 1977-01-25 1978-08-16 Hitachi Zosen Corp Apparatus for detecting position of crane
JPS5396130A (en) * 1977-02-03 1978-08-23 Kayaba Ind Co Ltd Power steering device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5389134A (en) * 1977-01-17 1978-08-05 Kayaba Ind Co Ltd Power steering device
JPS5393555A (en) * 1977-01-25 1978-08-16 Hitachi Zosen Corp Apparatus for detecting position of crane
JPS5396130A (en) * 1977-02-03 1978-08-23 Kayaba Ind Co Ltd Power steering device

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