JPS5853563A - Power steering device - Google Patents

Power steering device

Info

Publication number
JPS5853563A
JPS5853563A JP14880381A JP14880381A JPS5853563A JP S5853563 A JPS5853563 A JP S5853563A JP 14880381 A JP14880381 A JP 14880381A JP 14880381 A JP14880381 A JP 14880381A JP S5853563 A JPS5853563 A JP S5853563A
Authority
JP
Japan
Prior art keywords
valve
worm shaft
shaft
control valve
inner race
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
JP14880381A
Other languages
Japanese (ja)
Other versions
JPH0147351B2 (en
Inventor
Nariaki Tanaka
田中 成昭
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.)
Koyo Automatic Machine Co Ltd
Original Assignee
Koyo Automatic Machine 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 Koyo Automatic Machine Co Ltd filed Critical Koyo Automatic Machine Co Ltd
Priority to JP14880381A priority Critical patent/JPS5853563A/en
Publication of JPS5853563A publication Critical patent/JPS5853563A/en
Publication of JPH0147351B2 publication Critical patent/JPH0147351B2/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
    • B62D5/083Rotary valves

Landscapes

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

Abstract

PURPOSE:To make a rotary control valve smaller and smooth the steering feeling of a vehicle by a structure wherein the valve rotor of the rotary control valve is formed onto an input shaft and a valve sleeve, which is loosely fitted onto the outer periphery of the valve rotor, is loosely fitted in the inside diameter of the inner race of the angular contact bearing of a worm shaft. CONSTITUTION:The rotary control valve consists of the valve rotor 16, which is formed onto the input shaft 15, and the valve sleeve 20, which is rotatably and loosely fitted onto the outer periphery of the valve rotor and made of the material different from that of the worm shaft 10. One end of the worm shaft 10, which is formed as the inner race 27 at the valve housing 2 side, is supported through the angular contact bearing 12 by the valve housing 2 and the other end of the worm shaft 10 is supported through a thrust needle roller bearing 13 by the preload adjusting cover 3 of a casing main body 1. Furthermore, said valve sleeve 20 is loosely fitted in the inside diameter of the inner race 27 of the worm shaft 10. Accordingly, no direct transmission of the influence of axial load from the worm shaft 10 to the rotary control valve occurs and said load is accepted by both the bearings 12 and 13.

Description

【発明の詳細な説明】 本発明は、入力軸と出力軸とをトーションバを介して接
続し、入力軸とともに回転する弁ロータと、その弁ロー
タに回転自在に遊嵌し、ウオーム軸とともに回転する別
部材からなる弁スリーブとによって構成される回転制御
弁を備え、この弁スリーブには油圧ポンプからの圧力油
を供給する溝及び排出する溝が設けられており、出力軸
の負荷に応じたトーションバのねじれにより弁スリーブ
に対する弁ロータの相対回転位置に応じ、ウオーム軸に
螺合したピストンへの圧力流体を分配制御し、ピストン
に係合する出力軸に操舵出力を与える小形の回転制御弁
を備えた円滑な操舵感覚の得られる小形で軽量な動力舵
取装置に関する。
Detailed Description of the Invention The present invention connects an input shaft and an output shaft via a torsion bar, and includes a valve rotor that rotates together with the input shaft, and a valve rotor that is rotatably fitted loosely into the valve rotor and rotates together with a worm shaft. The valve sleeve is a separate member, and the valve sleeve is provided with grooves for supplying and discharging pressure oil from the hydraulic pump. A small rotation control valve that controls the distribution of pressure fluid to the piston screwed onto the worm shaft according to the relative rotational position of the valve rotor with respect to the valve sleeve through the torsion of the torsion bar, and provides steering output to the output shaft that engages the piston. The present invention relates to a small and lightweight power steering device that provides a smooth steering feel.

従来1この種の動力舵取装置については、省資源)省エ
ネルギーの対策から、自動車メーカーでは自動車の軽量
化への指向として、動力舵取装置の小形化による軽量化
と、室内スペースの拡大と動力舵取装置取付は周囲の簡
素化が急務であった。しかし、従来の動力舵取装置は入
力軸とともに回転する弁5−夕と、入力軸にトーシ冒ン
パを介して接続したウオーム軸とともに回転する弁スリ
ーブによって回転制御弁を構成し、弁ロータと弁スリー
ブとの相対回転に応じ、ウオーム軸に螺合したピストン
への圧力流体を分配制御し、このピストンに係合する出
力軸に操舵出力を与えるようにしている。この従来の装
置では入力軸と出力軸との間で、相対回転変位の生じる
操舵時において、入力トルクがウオーム軸とピストンと
の螺合により軸方向荷重としてウオーム軸を支持してい
るスラスト軸受に作用するが、特に回転制御弁側の圧力
室に流体圧力が作用するように入力軸を操舵した場合、
回転制御弁側スラスト軸受には、前記軸方向荷重のほか
に弁スリーブとウオーム軸シール部との直径差から流体
圧力による軸方向荷重も作用する。したがって、従来の
動力舵取装置ではウオーム軸が弁スリーブによって軸方
向に支持されているため、回転制御弁を構成している弁
スリーブと弁ロータとの間では、出力軸の負荷の変化に
よりウオーム軸に軸方向荷重が加わり、その影響は直接
弁スリーブに及び、弁スリーブと弁ロータとの間でとじ
れが発生し回転制御弁としての円滑な作動には問題があ
り、この回転制御弁を小形化することもできなかった。
Conventional 1 Regarding this type of power steering device, as a measure to save resources and energy, automobile manufacturers are aiming to reduce the weight of automobiles by reducing the size of the power steering device, increasing the interior space, and increasing the power. When installing the steering gear, there was an urgent need to simplify the surroundings. However, in the conventional power steering device, a rotation control valve is constituted by a valve 5 that rotates together with the input shaft, and a valve sleeve that rotates together with a worm shaft that is connected to the input shaft via a torque pump. According to the relative rotation with the sleeve, the distribution of pressure fluid to the piston screwed onto the worm shaft is controlled, and a steering output is given to the output shaft that engages with the piston. In this conventional device, during steering when a relative rotational displacement occurs between the input shaft and the output shaft, input torque is applied to the thrust bearing that supports the worm shaft as an axial load due to the threaded engagement between the worm shaft and the piston. However, especially when the input shaft is steered so that fluid pressure acts on the pressure chamber on the rotation control valve side,
In addition to the above-mentioned axial load, an axial load due to fluid pressure due to the diameter difference between the valve sleeve and the worm shaft seal portion also acts on the rotation control valve side thrust bearing. Therefore, in conventional power steering devices, the worm shaft is supported in the axial direction by the valve sleeve, and therefore, the worm shaft is axially supported by the valve sleeve, which makes up the rotation control valve. An axial load is applied to the shaft, which directly affects the valve sleeve, causing binding between the valve sleeve and the valve rotor, which poses a problem for smooth operation as a rotation control valve. It was also impossible to make it smaller.

本発明はこのような従来の動力舵取装置の問題点を解決
し、円滑な操舵感覚の得られる小形で作動効率のよい軽
量な動力舵取装置の提供を課題とするものであり、動力
舵取装置の回転制御弁の構成は、弁ロータが入力軸に形
成されており、その外周には回転自在に遊嵌されたウオ
ーム軸と別部材からなり、かつ、別に支持された弁スリ
ーブで構成されている。ウオーム軸においてはこの回転
制御弁側をウオーム軸にインナーレースを形成した斜接
玉軸受で支持することにより、従来の回転制御弁で問題
となった弁口−タと弁スリーブのこじ省を、又弁スリー
ブをインナーレースの内径側に遊嵌し、さらにウオーム
軸を斜橋玉軸受で支持し、他方、シリンダ端側をスラス
トニードル軸受で支持することによりウオーム軸のこじ
れによる支持軸受の片当りも解消し、インナーレースと
ウオーム軸の一本化および回転制御弁をインナーレース
の内径側に構成することにより、動力舵取装置としての
小形化、軽量化を図るものである。この動力舵取装置の
回転制御弁を構成する弁スリーブは、ウオーム軸と別部
材からなり、内径部に流量制御のための軸方向の溝を持
ち外径部には圧力流体を分配し、圧力室と区分する円周
溝及びシール溝を設けており、ウオーム軸を支持してい
るウオーム軸と一体形成されたインナーレースをもつ斜
橋玉軸受のインナーレースの内径部で、インナーレース
の内径部と外径部との肉厚部分のほぼ中央を通る作用線
の間の・、入力軸とウオーム軸との軸線上で、弁ロータ
を形成した入力軸とバルブハウジングの間に遊嵌して配
置されており、弁スリーブを収容するウオーム軸に形成
したインナーレースをもつ斜橋玉軸受のインナーレース
の内径は、バルブハウジングの内径よりわずかに大きく
しである。しだがってバルブハウジングの内径と斜橋玉
軸受のインナーレースの内径との直径差により、圧力室
に圧力が作用した場合、弁スリーブがインナーレースか
ら抜けでないよう、ウオーム軸に一体形成されたインナ
ーレースの内径側に遊嵌し、ウオーム軸に圧入した軸方
向ピンにより回転方向に位置決めされ、入力軸側はスナ
ップリングで軸方向に位置決めされてウオーム軸の回転
が弁スリーブに伝達されるので、出力軸の負荷に応じて
軸方向荷重が作用し、ウオーム軸が偏心回転し軸方向荷
重によりウオーム軸に一体形成したウオーム軸を支持す
る斜橋玉軸受のインナーレースがこじれても、ウオーム
軸の負荷に影響なく回転制御弁の弁ロータと弁スリーブ
は、こじれることなく円滑に弁作動を行うことができ、
入力軸には弁ロータが一体形成されているため1部品点
数も少なく、バルブボディも小形化できるだめ、シール
効果もよく油洩れが少なくでき、小形の回転制御弁をも
つ円滑な操舵感覚の得られる小形で作動効率のよい軽量
の動力舵取装置を提供するものである。
The present invention solves the problems of the conventional power steering device, and aims to provide a small, lightweight power steering device with good operating efficiency that provides a smooth steering feeling. The rotation control valve of the control device has a valve rotor formed on the input shaft, a worm shaft loosely fitted around the outer periphery of the worm shaft, and a valve sleeve supported separately. has been done. On the worm shaft, the rotation control valve side is supported by a diagonal ball bearing with an inner race formed on the worm shaft, thereby eliminating the difficulty of creating a valve port and valve sleeve, which was a problem with conventional rotation control valves. In addition, by fitting the valve sleeve loosely on the inner diameter side of the inner race, supporting the worm shaft with a diagonal bridge ball bearing, and supporting the cylinder end side with a thrust needle bearing, uneven contact of the support bearing due to twisting of the worm shaft can be avoided. By integrating the inner race and the worm shaft and configuring the rotation control valve on the inner diameter side of the inner race, the power steering device can be made smaller and lighter. The valve sleeve that constitutes the rotation control valve of this power steering device is made of a separate member from the worm shaft, and has an axial groove on its inner diameter for flow control, and an outer diameter for distributing pressure fluid. The inner diameter part of the inner race of a diagonal bridge ball bearing that has a circumferential groove and a seal groove that separate it from the chamber, and has an inner race that is integrally formed with the worm shaft that supports the worm shaft. Loosely fitted between the input shaft and the valve housing, which form the valve rotor, on the axis of the input shaft and the worm shaft, between the line of action passing through approximately the center of the thick part of the valve rotor and the outer diameter part. The inner diameter of the inner race of a diagonal bridge ball bearing having an inner race formed on the worm shaft that accommodates the valve sleeve is slightly larger than the inner diameter of the valve housing. Therefore, when pressure is applied to the pressure chamber due to the diameter difference between the inner diameter of the valve housing and the inner diameter of the inner race of the slanted bridge ball bearing, the valve sleeve is integrally formed on the worm shaft to prevent it from coming off from the inner race. It is positioned in the rotational direction by an axial pin that loosely fits on the inner diameter side of the inner race and press-fitted into the worm shaft, and the input shaft side is positioned in the axial direction by a snap ring so that the rotation of the worm shaft is transmitted to the valve sleeve. Even if the axial load acts on the output shaft in response to the load on the output shaft, the worm shaft rotates eccentrically, and the inner race of the diagonal bridge ball bearing that supports the worm shaft, which is integrally formed with the worm shaft, is twisted due to the axial load. The valve rotor and valve sleeve of the rotating control valve can operate smoothly without twisting, regardless of the load.
Since the valve rotor is integrally formed on the input shaft, there are fewer parts, the valve body can be made smaller, the sealing effect is better, there is less oil leakage, and the small rotation control valve provides a smooth steering feel. The present invention provides a small, lightweight power steering device with high operating efficiency.

次に実施例を示した図面により、本発明の詳細な説明す
る。
Next, the present invention will be described in detail with reference to drawings showing embodiments.

本発明の動力舵取装置のケーシングは、図に示すように
ケーシング本体1とノくルプノ・ウジング2及び予圧調
整カバーによって構成されており、4はケーシング本体
を圧力室5.6に区分し、ラック7が形成されたランク
ピストンである。このラック7が出力軸8のセクタギヤ
9と噛み合い、出力軸8より図示していないリンケージ
を経て、操向輪に操舵出力が伝達されるよ。
As shown in the figure, the casing of the power steering device of the present invention is composed of a casing body 1, a nozzle housing 2, and a preload adjustment cover, and 4 divides the casing body into pressure chambers 5 and 6. This is a rank piston on which a rack 7 is formed. This rack 7 meshes with a sector gear 9 of an output shaft 8, and steering output is transmitted from the output shaft 8 to the steering wheels via a linkage (not shown).

う連結されている。ウオーム軸 10は、ラックピスト
ン4の軸心部に螺設したボークネジ溝に循環するボール
11を介して螺合し、ラックピストン4を貫通して、バ
ルブハウジング2側を斜橋玉軸受12で、他方をスラス
トニードルベアリングで支持しており、14は圧力室5
.6を仕切るシールである。入力軸15には弁制御のだ
めの弁ロータ16が形成されており、ウオーム軸10 
とはトーションバ17を介してウオーム軸10に接続さ
れ、ラジアル軸受18.19によって支持されている。
are connected. The worm shaft 10 is screwed into a balk screw groove screwed into the shaft center of the rack piston 4 via a circulating ball 11, passes through the rack piston 4, and is mounted on the valve housing 2 side with a diagonal bridge ball bearing 12. The other is supported by a thrust needle bearing, and 14 is a pressure chamber 5.
.. This is a sticker that separates 6. A valve rotor 16 for valve control is formed on the input shaft 15, and a worm shaft 10
is connected to the worm shaft 10 via a torsion bar 17 and supported by radial bearings 18,19.

本発明の特徴とする回転制御弁は、入力軸15に形成さ
れた弁ロータ16と、これの外周にウオーム軸10と別
部材からなり回転自在に遊嵌された弁スリーブ20とか
ら構成されている。弁スリーブ20は1内径部に流量制
御のだめの軸方向の溝21を持ち、外径部には圧力流体
を分配し、圧力室5と区画するに必要な円周溝22.2
3およびシール溝24を有している。さらにこの弁スリ
ーブ20は、ウオーム軸10を支持する斜橋玉軸受12
0作用線25が、弁スリーブ20を収容するウオーム軸
10に形成しだ斜橋玉軸受12のインナーレース27の
内径部26と外径部28 との肉厚部分29のほぼ中央
を通る作用線25の間で入力軸15と、ウオーム軸10
の軸線上で、弁口−タ 16を形成した入力軸10 と
パルプハウジング20間に配置されている。また、弁ス
リーブ20はウオーム軸10を支持する斜橋玉軸受12
のインナーレース27が形成された内径側でウオーム軸
lOに圧入された軸方向ピン30により回転方向に対し
て位置決めされ、軸方向については入力軸15側を、弁
スリーブ20゛の内径部に圧入されたスリーブ31の側
面をスナップリング32で位置決めして、回転自在に遊
嵌してウオーム軸10の回転が伝達される。またウオー
ム軸10を支持する斜橋玉軸受12のインナーレース2
7の内径は、バルブハウジング2の内径33よりわずか
に大きく、その直径差により圧力室5に圧力が作用した
場合、弁スリーブ20がインナーレース27から抜は出
るより、むしろ入り込む方向に力は作用する。そして、
弁スリーブ20は、ウオーム軸ioとは別部材からなり
、インナーレース27の内径部26に遊嵌して位置決め
されているため、ウオーム軸10を支持している斜橋玉
軸受12のウオーム軸10に形成されたインナーレース
27が、出力軸8からの負荷に対するポールナツトを介
したウオーム軸10に加わる軸方向荷重により、ウオー
ム軸lOが偏心回転し、インナーレース27がこじれて
も回転制御弁を構成する弁スリーブ20には、ウオーム
軸10の軸方向荷重に左右されることなくウオーム軸1
0の回転が伝達されているため、回転制御弁の弁スリー
ブ20と弁ロータ16は、こじれることなく円滑に作動
する。
The rotation control valve that is a feature of the present invention is composed of a valve rotor 16 formed on an input shaft 15, and a valve sleeve 20, which is a separate member from the worm shaft 10 and is loosely fitted around the outer periphery of the rotor so as to be freely rotatable. There is. The valve sleeve 20 has an axial groove 21 on its inner diameter for flow control, and a circumferential groove 22.2 on its outer diameter necessary for distributing the pressure fluid and separating it from the pressure chamber 5.
3 and a seal groove 24. Further, this valve sleeve 20 has a diagonal bridge ball bearing 12 that supports the worm shaft 10.
The line of action 25 is a line of action that passes through approximately the center of the thick portion 29 between the inner diameter part 26 and the outer diameter part 28 of the inner race 27 of the slant bridge ball bearing 12 formed on the worm shaft 10 that accommodates the valve sleeve 20. 25 between the input shaft 15 and the worm shaft 10
The pulp housing 20 is disposed between the input shaft 10 forming the valve port 16 and the pulp housing 20 on the axis of the input shaft 10 . The valve sleeve 20 also includes a diagonal bridge ball bearing 12 that supports the worm shaft 10.
The inner diameter side where the inner race 27 is formed is positioned with respect to the rotational direction by an axial pin 30 press-fitted into the worm shaft lO, and in the axial direction, the input shaft 15 side is press-fitted into the inner diameter part of the valve sleeve 20゛. The side surface of the sleeve 31 is positioned with a snap ring 32, and the snap ring 32 is loosely fitted so as to be rotatable, thereby transmitting the rotation of the worm shaft 10. In addition, the inner race 2 of the diagonal bridge ball bearing 12 that supports the worm shaft 10
The inner diameter of the valve housing 2 is slightly larger than the inner diameter 33 of the valve housing 2, and when pressure is applied to the pressure chamber 5 due to the difference in diameter, the force acts in the direction in which the valve sleeve 20 enters the inner race 27 rather than pulling out. do. and,
The valve sleeve 20 is made of a separate member from the worm shaft io, and is positioned by loosely fitting into the inner diameter portion 26 of the inner race 27, so that the worm shaft 10 of the diagonal bridge ball bearing 12 supporting the worm shaft 10 The inner race 27 formed in this structure constitutes a rotation control valve even if the worm shaft lO rotates eccentrically due to the axial load applied to the worm shaft 10 via the pole nut in response to the load from the output shaft 8, and the inner race 27 is twisted. The valve sleeve 20 has a structure that allows the worm shaft 1 to move freely without being affected by the axial load of the worm shaft 10.
Since zero rotation is transmitted, the valve sleeve 20 and valve rotor 16 of the rotation control valve operate smoothly without being twisted.

以上のように、本発明による動力舵取装置は、回転制御
弁部において回転制御弁を構成する弁ロータが入力軸に
形成さ゛れ、弁スリーブは弁ロータに回転自在に遊嵌し
て、ウオーム軸に一体形成されたウオーム軸を支持する
斜橋玉軸受のインナーレースの内径側で斜橋玉軸受の作
用線の間で、入力軸の軸線上に、ウオーム軸の軸端に圧
入した軸方向ピンにより回転方向に位置決めされ、軸方
向に□対しては入力軸側をスナップリングで位置決めし
て配置し、ウオーム軸の回転が伝達される。したがって
ウオーム軸に加わる軸方向荷重や、出力軸からのウオー
ム軸に伝わる偏心荷重による不円滑な回転制御弁の作動
が防止でき、回転制御弁としての円滑な操舵感覚を得る
ことができる。
As described above, in the power steering device according to the present invention, in the rotation control valve section, the valve rotor constituting the rotation control valve is formed on the input shaft, and the valve sleeve is rotatably fitted loosely into the valve rotor, and the worm shaft An axial pin press-fitted into the shaft end of the worm shaft on the axis of the input shaft between the line of action of the diagonal bridge ball bearing on the inner diameter side of the inner race of the diagonal bridge ball bearing that supports the worm shaft integrally formed with the The worm shaft is positioned in the rotational direction, and the input shaft side is positioned and arranged with a snap ring in the axial direction, and the rotation of the worm shaft is transmitted. Therefore, it is possible to prevent the rotation control valve from operating unsmoothly due to the axial load applied to the worm shaft or the eccentric load transmitted from the output shaft to the worm shaft, and it is possible to obtain a smooth steering feeling as a rotation control valve.

また、入力軸とロータとの一体化、ウオーム軸とその支
持斜橋玉軸受のインナーレースの一体化及び、このイン
ナーレースの内径側への弁スリーブの遊嵌配置により、
回転制御弁の小形化を図り、回転制御弁に使用している
シールも小形化でき、回転制御弁の作動抵抗も少なくな
り円滑な弁作動が達成でき、良好な操舵感覚を得ること
ができる小形で作動効率のよい軽量な動力舵取装置を提
供する。
In addition, by integrating the input shaft and rotor, integrating the inner race of the worm shaft and its supporting diagonal bridge ball bearing, and loosely fitting the valve sleeve to the inner diameter side of this inner race,
The rotary control valve has been made smaller, and the seal used in the rotary control valve has also been made smaller, reducing the operating resistance of the rotary control valve, achieving smooth valve operation, and providing a good steering feel. To provide a lightweight power steering device with high operational efficiency.

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

図は、本発明に係る動力舵取装置の実施例を示す縦断面
図である。 1 ケーシング本体 2 バルブハウジング 3 予圧調整カバー 4 ラックピストン 9  セクタギヤ 10  ウオーム軸 12  斜橋玉軸受 13  スラストニードルベアリング 15  人力軸 16  弁ロータ 17  )−ションバ 18.19  ラジアル軸受 20  弁スリーブ 25  作用線 27  インナーレース 30  軸方向ピン 31  弁スリーブに圧入されたスリーブ32  スナ
ップリング
The figure is a longitudinal sectional view showing an embodiment of a power steering device according to the present invention. 1 Casing body 2 Valve housing 3 Preload adjustment cover 4 Rack piston 9 Sector gear 10 Worm shaft 12 Slanted bridge ball bearing 13 Thrust needle bearing 15 Human power shaft 16 Valve rotor 17 )-shaft 18.19 Radial bearing 20 Valve sleeve 25 Line of action 27 Inner Race 30 Axial pin 31 Sleeve 32 press-fitted into the valve sleeve Snap ring

Claims (2)

【特許請求の範囲】[Claims] (1)入力軸とウオーム軸とをトーションパを介して同
一軸線上で接続し入力軸とともに回転する弁ロータとそ
の弁ロータに回転自在忙遊嵌して、バルブハウジングと
□別部材からなるウオーム軸とともに回転する弁スリー
ブとによって#I威される回転制御弁を備え、この弁ス
リーブには油圧ポンプからの圧力油を供給する溝及び排
出する溝が設けられており、出力軸の負荷に応じたトー
ションバのねじれにより、弁ロータと弁スリーブの相対
回転位置に応じ、ウオーム軸に螺合したピストンへの圧
力流体を分配制御し、このピストンと係合する出力軸に
操舵出力を与える動力舵取装置において、回転制御弁は
弁ロータが入力軸に形成され、その外周に回転自在に遊
嵌している弁スリーブは、ウオーム軸の端部にウオーム
軸と一体形成した、ウオーム軸を支持する斜接玉軸受の
インナーレースの内径に遊嵌して回転制御弁を構成し、
ウオーム軸からの軸方向荷重の影響が回転制御弁に直接
伝わらないようにし、さらにウオーム軸かもの軸方向の
荷重は、回転制御弁側をウオーム軸の端部に一体形成し
たインナーレースをもつ斜接玉軸受で受け、他方をスラ
ストニードル軸受でそれぞれ支持することによ抄、回転
制御弁を小形化し、油洩れを少なく滑らかな操舵感覚が
得られること番特徴とする小形で軽量化された動力舵取
装置。
(1) The input shaft and the worm shaft are connected on the same axis via a torsion pad, and the valve rotor rotates together with the input shaft, and the worm, which is a separate member that is rotatably fitted into the valve rotor, is connected to the valve housing. It is equipped with a rotation control valve controlled by a valve sleeve that rotates with the shaft, and this valve sleeve is provided with grooves for supplying and discharging pressure oil from the hydraulic pump, and the valve sleeve rotates according to the load on the output shaft. A power rudder that controls the distribution of pressure fluid to a piston screwed onto a worm shaft by twisting a torsion bar, depending on the relative rotational position of the valve rotor and valve sleeve, and provides steering output to an output shaft that engages with this piston. In the rotation control valve, the valve rotor is formed on the input shaft, and the valve sleeve, which is rotatably loosely fitted around the outer periphery of the rotor, supports the worm shaft, which is integrally formed with the worm shaft at the end of the worm shaft. It loosely fits into the inner diameter of the inner race of the angled ball bearing to form a rotation control valve.
In order to prevent the influence of the axial load from the worm shaft from being directly transmitted to the rotation control valve, the axial load on the worm shaft can be handled by using a diagonal structure with an inner race integrally formed on the end of the worm shaft. By supporting one ball bearing with a ball bearing and the other with a thrust needle bearing, the rotary control valve is made smaller, reducing oil leakage and providing a smooth steering feel. Steering device.
(2)゛前記、特許請求範囲(1)の動力舵取装置にお
いて、回転制御弁を構成、している弁スリーブにおいて
は、内径部に圧力流体を制御するだめの軸方向の溝を設
け、外径部には圧力流体を分配し、圧力室と区分する円
周溝及びシール溝を設けており、ウオーム軸を支持して
いるウオーム軸に一体形成したインナーレースノ内径部
は、バルプノ1ウジングの内径部よりわずかに大きくそ
の直径差により圧力室に圧力が作用した場合弁スリーブ
i5インナーレースから抜は出ないよう配慮し、インナ
ーレースの内径部に遊嵌されている弁スリーブは、その
内径部の両端に別部材からなるスリーブが圧入されてお
り、ウオーム軸のイ部のインナーレースの内側に圧入1
された軸方向のピンは位置決めされ、入力軸側はス ナツプリングで位置決めされ、ウオーム軸を支持してい
る斜i玉軸受の作用線が、弁スリーブを収容するインナ
ーレースの内径部と外径部との肉厚部分のほぼ中央を通
る作用線の間の入力軸とウオーム軸との軸線上でインナ
ーレースの内径に遊嵌して配置されウオーム軸の回転が
弁スリーブに伝達されているため、出力軸からの負荷及
びボーノ【・ナツトを通したウオーム軸が軸方向偏心荷
重により偏心回転してインナーレースがこじれても、回
転制御弁の弁スリーブと弁ロータは、こじれることなく
円滑な弁作動を行なうことを特徴とした、小形の回転制
御弁をもつ、円滑な操舵感覚の得られる小形で軽量の動
力舵取装置。
(2) In the power steering device according to claim (1), the valve sleeve constituting the rotation control valve is provided with an axial groove in the inner diameter portion for controlling the pressure fluid; The outer diameter part is provided with a circumferential groove and a seal groove for distributing pressure fluid and separating it from the pressure chamber. The inner diameter of the valve sleeve is slightly larger than the inner diameter of the inner race, and the valve sleeve is loosely fitted to the inner diameter of the inner race. A sleeve made of a separate member is press-fitted at both ends of the worm shaft.
The input shaft side is positioned with a snap spring, and the line of action of the diagonal I-ball bearing supporting the worm shaft is aligned with the inner diameter and outer diameter of the inner race that accommodates the valve sleeve. The output is Even if the load from the shaft and the worm shaft passing through the nut rotate eccentrically due to an eccentric load in the axial direction and the inner race becomes distorted, the valve sleeve and valve rotor of the rotation control valve will maintain smooth valve operation without becoming distorted. A small and lightweight power steering device with a small rotation control valve that provides a smooth steering feel.
JP14880381A 1981-09-22 1981-09-22 Power steering device Granted JPS5853563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14880381A JPS5853563A (en) 1981-09-22 1981-09-22 Power steering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14880381A JPS5853563A (en) 1981-09-22 1981-09-22 Power steering device

Publications (2)

Publication Number Publication Date
JPS5853563A true JPS5853563A (en) 1983-03-30
JPH0147351B2 JPH0147351B2 (en) 1989-10-13

Family

ID=15461051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14880381A Granted JPS5853563A (en) 1981-09-22 1981-09-22 Power steering device

Country Status (1)

Country Link
JP (1) JPS5853563A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4887667A (en) * 1986-10-01 1989-12-19 Takashi Kuhara Device for providing communication between water tanks of heat accumulation tank system
CN108974116A (en) * 2016-10-09 2018-12-11 中国北方车辆研究所 A kind of diverter support seat assembly and its diverter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544012A (en) * 1978-09-18 1980-03-28 Jidosha Kiki Co Ltd Power steering apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544012A (en) * 1978-09-18 1980-03-28 Jidosha Kiki Co Ltd Power steering apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4887667A (en) * 1986-10-01 1989-12-19 Takashi Kuhara Device for providing communication between water tanks of heat accumulation tank system
US5009261A (en) * 1986-10-01 1991-04-23 Takashi Kuhara Device for providing communication between water tanks of heat accumulation tank system
CN108974116A (en) * 2016-10-09 2018-12-11 中国北方车辆研究所 A kind of diverter support seat assembly and its diverter
CN108974116B (en) * 2016-10-09 2020-04-28 中国北方车辆研究所 Steering gear supporting seat assembly and steering gear thereof

Also Published As

Publication number Publication date
JPH0147351B2 (en) 1989-10-13

Similar Documents

Publication Publication Date Title
JPH0255262B2 (en)
JPH0679895B2 (en) Hydraulically operated steering device
US5303793A (en) Steering apparatus
JPS5853563A (en) Power steering device
JP3543043B2 (en) Hydraulic power steering device
JPS621793Y2 (en)
JP2001520959A (en) Rotary shift valve for automotive power steering
EP0001705B1 (en) Power assisted steering gear assembly
US3362248A (en) Power steering gear for motor vehicles
JP2002029430A (en) Steering system for vehicle
JP3762531B2 (en) Variable throttle valve
JPH0547740Y2 (en)
JP3678555B2 (en) Hydraulic power steering device
JPS6211259Y2 (en)
JP2850148B2 (en) Power steering device
JP3655696B2 (en) Variable throttle valve and hydraulic power steering device
US4230020A (en) Integral servo steering gear with rack transmission
JP2989990B2 (en) Valve device
JP4433178B2 (en) Hydraulic power steering device and manufacturing method thereof
JPH0133420Y2 (en)
JP3910700B2 (en) Hydraulic power steering device
JPH033098Y2 (en)
JPS6312041Y2 (en)
JPH03258658A (en) Power steering device
JPH0229020Y2 (en)