JPS60197465A - Power steering apparatus - Google Patents

Power steering apparatus

Info

Publication number
JPS60197465A
JPS60197465A JP5354784A JP5354784A JPS60197465A JP S60197465 A JPS60197465 A JP S60197465A JP 5354784 A JP5354784 A JP 5354784A JP 5354784 A JP5354784 A JP 5354784A JP S60197465 A JPS60197465 A JP S60197465A
Authority
JP
Japan
Prior art keywords
annular groove
power piston
piston
power
oil
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.)
Granted
Application number
JP5354784A
Other languages
Japanese (ja)
Other versions
JPH0420827B2 (en
Inventor
Hiroshi Hachisuga
蜂須賀 寛
Yoshihiko Nomura
野村 良彦
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.)
Aisin Corp
Original Assignee
Aisin Seiki 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 Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Priority to JP5354784A priority Critical patent/JPS60197465A/en
Publication of JPS60197465A publication Critical patent/JPS60197465A/en
Publication of JPH0420827B2 publication Critical patent/JPH0420827B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D5/00Power-assisted or power-driven steering
    • B62D5/06Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE:To simplify the structure of a control valve by introducing pressurized oil from the upper part of the center part of the control valve and allowing discharged oil to return into a reservoir from the upper part of the center part of the control valve. CONSTITUTION:When a valve piston 10 shifts rightward, an annular groove 27 communicating to an oil pump 26 communicates to the second annular groove 19, and the communication between the groove 19 and the first annular groove 18 is cut off. At the same time, also the communication between the second annular groove 19 and the groove 28 on the return side is cut off. Therefore, the pressurized oil introduced into the second annular groove 19 is supplied into a pressure chamber 3 through an oil passage 23, and a piston 4 is assisted. While, the pressure chamber 21 communicates to a reservoir 29 through an oil passage 21 and grooves 20 and 28.

Description

【発明の詳細な説明】 本発明は、動力かじ取り装置に関する。動力かじ取シ装
置は、第1図に示すように、ステアリングホイール(ハ
ンドル)と連動するウオームシャフト1が、シリンダ内
に収容され且つその両側に圧力室2、3を作るパワーピ
ストン4内にボール5を用い制限的に回転できるよう配
されたステアリングナツト6に係合し、このパワーピス
トン4が車輪の変向をなすリンク機構に通じるセクタシ
ャフト7に,ラックとピニオン関係で連結され、圧力室
2、3の一方の圧によって助勢されたパワーピストン4
の軸心方向の動きにより、セクタシャフト1を回動させ
動力かじ取りを可能にさせる。さらに、パワーピストン
4には、ステアリングナツト6に一端が固定すれたパル
プピン8によって作動させられるパルプピストン1G’
t−有するコントロールパルプ9が組込まれ、このコン
トロールパルプ9によってパワーピストンの両側の圧力
室2.3の何れか一方に油圧を供給させる。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power steering system. As shown in Fig. 1, the power steering system includes a worm shaft 1 that is connected to a steering wheel (handle), and a power piston 4 that is housed in a cylinder and that creates pressure chambers 2 and 3 on both sides of the worm shaft. The power piston 4 is connected in a rack-and-pinion relationship to a sector shaft 7 leading to a link mechanism for changing the direction of the wheels, and the power piston 4 engages with a steering nut 6 arranged for limited rotation using a power piston 4. Power piston 4 assisted by one pressure of 2 and 3
The movement in the axial direction rotates the sector shaft 1 and enables power steering. Further, the power piston 4 includes a pulp piston 1G' actuated by a pulp pin 8 whose one end is fixed to the steering nut 6.
A control pulp 9 having a control pulp 9 is installed, and this control pulp 9 supplies hydraulic pressure to one of the pressure chambers 2.3 on both sides of the power piston.

この発明は、前述した如きコントロールパルプ9を有す
る動力かじ取シ装置の改良に利用される。
The present invention is utilized for improving a power steering device having the control pulp 9 as described above.

〔従来技術とその問題点〕[Prior art and its problems]

特公昭49−1809号公報に開示される如く、前述し
た如き基本構成を有する動力かじ取り装置は、公知であ
る。同公報の第3図に示される如く、公知の動力かじ取
シ装置の油圧回路は、シリンダとパワーピストンとによ
って区画され、且つコントロールパルプの両側に位置す
る室に圧油を供給し、この圧油をバルブピストンの動き
に応じて、パワーピストンの両側の圧力室の何れか一方
に供給し、他方の圧力室をバルブピストンを介して、コ
ントロールパルプの中央部(3) からリザーバにもどす構成となっている。
As disclosed in Japanese Patent Publication No. 49-1809, a power steering device having the above-mentioned basic configuration is well known. As shown in Figure 3 of the same publication, the hydraulic circuit of the known power steering system supplies pressure oil to a chamber partitioned by a cylinder and a power piston and located on both sides of the control pulp. According to the movement of the valve piston, oil is supplied to one of the pressure chambers on both sides of the power piston, and the other pressure chamber is returned to the reservoir from the central part (3) of the control pulp via the valve piston. It has become.

ところで、パワーピストンは、圧力室からの圧によって
助勢されてその軸心方向にシリンダに対し摺動するから
、コントロールパルプの両側の室に供給された圧油が、
パワーピストンとシリンダ内壁面との間から洩れるのを
防止するため、パワーピストンの外周面に比較的大きな
シール材を配さなければならない。さらに、コントロー
ルパルプの両側の室のシール材も必要とする。
By the way, since the power piston is assisted by the pressure from the pressure chamber and slides relative to the cylinder in its axial direction, the pressure oil supplied to the chambers on both sides of the control pulp
In order to prevent leakage between the power piston and the inner wall surface of the cylinder, a relatively large sealing material must be placed on the outer peripheral surface of the power piston. Furthermore, sealing material for the chambers on both sides of the control pulp is also required.

このようなシール材の使用は、パワーピストンの摺動抵
抗を大とさせ、又、シール材を配する溝加工等を必要と
し、製作組付工数も大となシ、経済的でない。
The use of such a sealing material increases the sliding resistance of the power piston, requires groove machining, etc. for arranging the sealing material, and requires a large number of man-hours for manufacturing and assembly, which is not economical.

〔本発明の技術的課題とその技術的手段〕本発明は、前
述した如き従来の油圧回路を改良させることを技術的課
題とし、該技術的課題の解決のため、圧油を、コントロ
ールパル7”(7)中央上方部から導入し、この圧油を
コントロールバルブ全弁して圧力室の一方に供給し、又
、(4) 圧力室の他方をコントロールパルプを介し、このパルプ
の中央上方部からリザーバに連通させる油圧回路とする
技術的手段を用いる。
[Technical problem of the present invention and its technical means] The present invention has a technical problem of improving the conventional hydraulic circuit as described above, and in order to solve the technical problem, pressure oil is (7) Introduce pressure oil from the upper central part and supply this pressure oil to one of the pressure chambers by opening all control valves, and (4) Supply the other pressure oil to one of the pressure chambers through the control pulp to the upper central part of this pulp. Technical means are used to create a hydraulic circuit that communicates with the reservoir.

〔本発明の作用効果〕[Actions and effects of the present invention]

パワーピストン側のステアリングナツトに固定されたバ
ルブピストンによって作動されるコントロールパルプは
、オイルポンプからの圧油を、コントロールパルプの中
央部で、パワーピストンの両側の圧力室の一方に供給し
、他方の圧力室を、コントロールパルプの中央部を介し
てリザーバに連通させるので、コントロールパルプの両
側への圧油の供給はない。従って、シール部材が従来よ
り少なくて済む。本発明のコントロールパルプの構造は
簡単であり低価格で製造可能であるから、小型車にも適
用可能となる。
The control pulp, which is actuated by a valve piston fixed to the steering nut on the power piston side, supplies pressurized oil from the oil pump to one of the pressure chambers on both sides of the power piston in the center of the control pulp, and to the other pressure chamber. Since the pressure chamber is communicated with the reservoir through the central part of the control pulp, there is no supply of pressure oil to both sides of the control pulp. Therefore, fewer sealing members are required than in the past. Since the control pulp of the present invention has a simple structure and can be manufactured at low cost, it can also be applied to small cars.

〔実施例〕〔Example〕

第2図を参照して本発明の一例のコントロールパルプ9
を説明する。バルブピストン10は。
Control pulp 9 of an example of the present invention with reference to FIG.
Explain. The valve piston 10 is.

パワーピストン4に設けたボア11内に摺動自在に配さ
れ、その左右部に一端が開放された対の穴12.13T
h有す。・くワーピストン4に固定された反力ビストン
14.15t−穴12.13に夫々挿入し、パルプピス
トン10内に、対の反力室16.17e形成する。バル
ブピストン10の外周面に第1、第2および第3の環状
溝1B、19.20を設け、第1の環状@18は、油路
21を介して第3の環状溝20に且つ油路22を介して
パワーピストン4の両側の圧力室の一方2に導通する。
A pair of holes 12.13T are slidably arranged in the bore 11 provided in the power piston 4 and have one end open on the left and right sides thereof.
h has. - Reaction force pistons 14, 15t fixed to the blower piston 4 are inserted into the holes 12, 13, respectively, to form a pair of reaction force chambers 16, 17e in the pulp piston 10. First, second and third annular grooves 1B, 19.20 are provided on the outer circumferential surface of the valve piston 10, and the first annular groove @18 is connected to the third annular groove 20 via the oil passage 21 and to the oil passage. 22 to one 2 of the pressure chambers on both sides of the power piston 4.

第2の環状溝19は油路23を介し他方の圧力室3に通
じる。第1の圧力室16はオリフィス24を介して第2
の環状溝19に通じ、又、第2の反力室17はオリフィ
ス25を介して第3の環状溝20に通じる。
The second annular groove 19 communicates with the other pressure chamber 3 via an oil passage 23 . The first pressure chamber 16 is connected to the second pressure chamber through an orifice 24.
The second reaction force chamber 17 also communicates with the third annular groove 20 via an orifice 25 .

パワーピストン4のボア11側に、オイルポンプ26に
通じる環状溝27を設ける。この溝27は、第1および
第2の環状溝18.1!j間に位置する。該溝27とは
離間して且つ第2および第3の環状溝19.20間に位
置する環状溝2B’k、パワーピストン4のボア11側
に配す。この溝28は、リザーバ29に通じる。
An annular groove 27 communicating with an oil pump 26 is provided on the bore 11 side of the power piston 4. This groove 27 is connected to the first and second annular grooves 18.1! Located between j. An annular groove 2B'k, which is spaced apart from the groove 27 and located between the second and third annular grooves 19 and 20, is arranged on the bore 11 side of the power piston 4. This groove 28 opens into a reservoir 29 .

前述したコントロールバルブ9の作用につ(へて、バル
ブピン8によってバルブピストン10が、第2図でみて
、右方向へ移動した場合を例にとって説明する。バルブ
ピストン10の右方向への移動は、オイルポンプ26に
通じる環状溝27を、第2の環状溝19に導通させ且つ
該溝19と第1の環状溝18との連通を遮断さぜる。又
、第2の環状溝19と戻り佃の溝28との連通を遮断さ
せる。かくして、第2の環状溝19に入った圧油は、パ
ワーピストン4の両側に設けた圧力室の一方3に油路2
3f:介し入シ、パワーピストン4を助勢する。他方の
圧力室2は、戻り側の溝28が第3の環状溝20と導通
しているので、油路21、および両溝20,2Bを介し
て、リザーバ29に通じ、該圧力室2の圧をリザーバ2
9にもどす。
The operation of the control valve 9 described above will be explained using an example in which the valve piston 10 is moved to the right as seen in FIG. 2 by the valve pin 8.The movement of the valve piston 10 to the right is as follows. The annular groove 27 communicating with the oil pump 26 is brought into communication with the second annular groove 19 and the communication between the groove 19 and the first annular groove 18 is cut off. Thus, the pressure oil that has entered the second annular groove 19 passes through the oil passage 2 to one 3 of the pressure chambers provided on both sides of the power piston 4.
3f: Intervening and assisting the power piston 4. The return side groove 28 of the other pressure chamber 2 is in communication with the third annular groove 20, so it communicates with the reservoir 29 via the oil passage 21 and both grooves 20, 2B, and the pressure chamber 2 Pressure reservoir 2
Return to 9.

一方、オリフィス24を介して第1の反力室16に入っ
た圧油がバルブピストン10の右方向への移動に対する
反力となシ、かじ取りを重(7) くさせ、操舵フィーリングを向上させる。
On the other hand, the pressure oil that has entered the first reaction chamber 16 through the orifice 24 acts as a reaction force against the rightward movement of the valve piston 10, making steering heavier (7) and improving the steering feeling. let

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

第1図は動力かじ取シ装置を示す断面図、第2図は本発
明の一例のコントロールバルブ部の断面図である。 図中:1・・・ウオームシャフト、2.3・・・圧力室
、4・・・パワーピストン、6・・・ステアリングナツ
ト、9・・・コントロールバルブ、1G・・・バルブピ
ストン、16.17・・・反力室、18.19.20・
・・環状溝、26・・・オイルポンプ。 代理人 弁理士 桑 原 英 明 (8)
FIG. 1 is a sectional view showing a power steering device, and FIG. 2 is a sectional view of a control valve portion according to an example of the present invention. In the diagram: 1... Worm shaft, 2.3... Pressure chamber, 4... Power piston, 6... Steering nut, 9... Control valve, 1G... Valve piston, 16.17 ...Reaction force room, 18.19.20・
...Annular groove, 26...Oil pump. Agent Patent Attorney Hideaki Kuwahara (8)

Claims (1)

【特許請求の範囲】[Claims] 車幅のステアリングホイールと連動するウオームシャフ
トと、前記ウオームシャフトとステアリングナツトを介
して係合し且つ前記ウオームシャフトに沿って摺動する
パワーピストンと、該パワーピストンのラックを係合す
るセクタシャフトと、前記パワーピストン内に組込まれ
且つ前記ステアリングナツトに固定されたパルプピンに
よシ作動させられるコントロールパルプを有する動力か
じ取り装置において、前記コントロールパルプが、前記
パワーピストンのボア内に摺動自在に配され且つその外
周面に第1、第2および第3の環状溝を有するパルプピ
ストンを有し、前記第1の環状溝を前記第3の環状溝お
よび前記パワーピストンの両側に設けた圧力室の一方に
連通させ、前記第2の環状溝を前記パワーピストンの両
側に設けた圧力室の他方に連通させ、前記パワーピスト
ンのボア側であって且つ前記第1および第2の環状溝の
間に供給圧油を受ける環状溝、および前記パワーピスト
ンのボア側であって且つ前記第2および第3の環状溝間
に戻り油を受ける環状溝を配したことを特徴とする動力
かじ取シ装置
a worm shaft that interlocks with a vehicle-width steering wheel; a power piston that engages with the worm shaft via a steering nut and slides along the worm shaft; and a sector shaft that engages a rack of the power piston. , a power steering device having a control pulp incorporated in the power piston and actuated by a pulp pin fixed to the steering nut, wherein the control pulp is slidably disposed in a bore of the power piston. and a pulp piston having first, second, and third annular grooves on its outer peripheral surface, and one of the pressure chambers in which the first annular groove is provided on both sides of the third annular groove and the power piston. the second annular groove communicates with the other of pressure chambers provided on both sides of the power piston, and is supplied between the first and second annular grooves on the bore side of the power piston. A power steering device comprising: an annular groove for receiving pressure oil; and an annular groove for receiving return oil on the bore side of the power piston and between the second and third annular grooves.
JP5354784A 1984-03-22 1984-03-22 Power steering apparatus Granted JPS60197465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5354784A JPS60197465A (en) 1984-03-22 1984-03-22 Power steering apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5354784A JPS60197465A (en) 1984-03-22 1984-03-22 Power steering apparatus

Publications (2)

Publication Number Publication Date
JPS60197465A true JPS60197465A (en) 1985-10-05
JPH0420827B2 JPH0420827B2 (en) 1992-04-07

Family

ID=12945819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5354784A Granted JPS60197465A (en) 1984-03-22 1984-03-22 Power steering apparatus

Country Status (1)

Country Link
JP (1) JPS60197465A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49116745A (en) * 1972-05-06 1974-11-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49116745A (en) * 1972-05-06 1974-11-07

Also Published As

Publication number Publication date
JPH0420827B2 (en) 1992-04-07

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