JPS5853567A - Power steering gear of automobile - Google Patents

Power steering gear of automobile

Info

Publication number
JPS5853567A
JPS5853567A JP15185881A JP15185881A JPS5853567A JP S5853567 A JPS5853567 A JP S5853567A JP 15185881 A JP15185881 A JP 15185881A JP 15185881 A JP15185881 A JP 15185881A JP S5853567 A JPS5853567 A JP S5853567A
Authority
JP
Japan
Prior art keywords
piston
rack
shaft
cylinder
pistons
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
JP15185881A
Other languages
Japanese (ja)
Other versions
JPH0150627B2 (en
Inventor
Seiji Komamura
駒村 清二
Katsuhiro Suzuki
勝博 鈴木
Katsukuni Kata
加太 克邦
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.)
KYB Corp
Original Assignee
Kayaba Industry 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 Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP15185881A priority Critical patent/JPS5853567A/en
Publication of JPS5853567A publication Critical patent/JPS5853567A/en
Publication of JPH0150627B2 publication Critical patent/JPH0150627B2/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
    • B62D5/20Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
    • B62D5/22Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type

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 and as well as facilitate the operation of the steering gear by a structure wherein two sets of piston and cylinder, in which each piston is housed, are respectively arranged at both ends of the tooth train of a rack cut on a pinion shaft. CONSTITUTION:The pistons 12 and 12' are provided and the cylinder tubes 13 and 13', in which the pistons 12 and 12' are housed respectively, are arranged so as to form cylinder chambers A and B ajacent to the pistons 12 and 12' respectively at both the ends of the tooth train 11 of the rack of the rack shaft 10. In this case, the inside diameter C1 of the cylinder tube 12' are made smaller than the inside diameter C2 of the cylinder tube 13' so that the area of the pressure facing at the piston 12' side, which is reduced by the cross-sectional area of the rack shaft 10, is equal to that at the piston 12 side. The rack shaft 10 is forcibly driven by the difference between the pressures within the chambers A and B. In such a manner as mentioned above, the pressure receiving areas at the pistons 12 and 12' are easily made equal to each other and no adjustment by means of an intricate valve mechanism becomes necessary.

Description

【発明の詳細な説明】 本発明は、主として自動車におけるパワーステアリング
装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a power steering device for an automobile.

従来のこの種装置のピストンにおいては、第1図に例示
するように、ラックシャフト1の一端にラック歯列2を
設け、ピニオンシャフト3に噛合せしめると共に、シャ
フト1に設けたピストン4をシリンダチューブ5内に収
容し、シリンダチューブ5の両端のシール部分6,6に
よって完全に密封されたシリンダ室A、B内の圧力差に
よってピストン4の左右への駆動を司どるようにしであ
ることは周知の通りであるが、この場合、ピストン4の
図示の中立位置から左右への作動距離Q。は、ラック歯
列2の中立位置からの作動距離Q。と同一であって、し
かも図上点線で示すようにラックシャフト1の先端1a
の左方への距離2゜の突出を必須とするものである。
In the conventional piston of this type of device, as illustrated in FIG. 1, a rack tooth row 2 is provided at one end of a rack shaft 1 and meshed with a pinion shaft 3, and a piston 4 provided on the shaft 1 is connected to a cylinder tube. It is well known that the drive of the piston 4 in the left and right directions is controlled by the pressure difference in the cylinder chambers A and B, which are housed in the cylinder tube 5 and are completely sealed by seal portions 6 and 6 at both ends of the cylinder tube 5. However, in this case, the working distance Q of the piston 4 from the illustrated neutral position to the left and right. is the working distance Q of the rack tooth row 2 from the neutral position. , and as shown by the dotted line in the figure, the tip 1a of the rack shaft 1
It is essential to protrude a distance of 2° to the left.

即ち一般的には、上述のラックシャフト1の端末の突出
のための可動余裕スペースを必須とするもので、全体と
して所要スペース2は作動距離らの5倍となる。
That is, in general, a movable margin space is required for the protrusion of the end of the rack shaft 1, and the required space 2 as a whole is five times the working distance.

又第2図に示すように、C,)t、P、型の従来のピス
トン構造においては、前輪に連繋する駆動シャフト7が
ラックシャフト1から分岐するように固定されているた
め、それだけラックシャフト1の縦長を長く構成し、全
体としての所要スペース君がそれだけ延長され、第1図
示のものよりは更に縦長が長くなること\なる一方、シ
ール部分8によって完全に密封されたシリンダチューブ
5内を除いたシャフト1の他の部分は、外部に開放され
た状態にあるため、ピニオンシャフト6回りの密封を完
全に実施することを必須とする。
Furthermore, as shown in Fig. 2, in the conventional piston structure of type C, )t, P, the drive shaft 7 connected to the front wheels is fixed so as to branch from the rack shaft 1, so that the rack shaft is 1 is configured to be long vertically, and the overall required space is extended accordingly, making the vertically longer than that shown in Figure 1. On the other hand, the inside of the cylinder tube 5, which is completely sealed by the seal portion 8, is Since the other parts of the shaft 1 that are removed are open to the outside, it is essential to completely seal the area around the pinion shaft 6.

従ってビニオン/ギフト6における摩擦i抗が増大する
とと\なる。更に重要なことは、シリンダ異なるため、
種々の手段を採用せざるを得迎いもので、例えば油圧を
調定するパルプ部の圧力差を反力として働かせるように
する等の方法があるが、それだけ構造が複雑とならざる
を得ない。
Therefore, when the friction i in the binion/gift 6 increases, it becomes \. More importantly, since the cylinders are different,
Various means have to be adopted, such as using a pressure difference in the pulp section to adjust the oil pressure as a reaction force, but this inevitably increases the complexity of the structure.

本発明は、上述のような従来のこの種装置の欠グ装置を
提供せんとするものでおる。
The present invention seeks to provide a conventional chipping device of this type as described above.

このため本発明は、ピニオン7ヤフトに連繋するラック
シャフトに刻設したラック歯列の両端に夫々ピストンと
該ピストンを収容するシリンダとを配設し1両シリンダ
の圧力差によってラックシャフトを強制駆動するように
したことを特徴とするもので、以下図面に示した実施例
に基いて本発第5図は本発明装置に基く要部の縦断面図
で、ラックシャフト10のラック歯列11の両端にピー
ストン12及び12′を設け、これらを収容するシリン
ダチューブ15 、13’を配し、シリンダ室A及びB
を形成しである。
For this reason, the present invention provides pistons and cylinders that accommodate the pistons at both ends of the rack tooth row carved on the rack shaft connected to the pinion 7 shaft, and forcibly drives the rack shaft by the pressure difference between the two cylinders. Based on the embodiments shown in the drawings below, FIG. Piece stones 12 and 12' are provided at both ends, cylinder tubes 15 and 13' are arranged to accommodate them, and cylinder chambers A and B are arranged.
It is formed.

この場合ピストン12と同12′との受圧面積が等しく
なるようにシリンダチューブ13の内径C0をシリンダ
チューブ16′の内径C7より小さく形成し、ラックシ
ャフト1によって減少されるピストン12′側の受圧面
積とピストン12側の受圧面積とを同一に保持するよう
にしである。
In this case, the inner diameter C0 of the cylinder tube 13 is formed smaller than the inner diameter C7 of the cylinder tube 16' so that the pressure receiving areas of the piston 12 and the piston 12' are equal, and the pressure receiving area on the piston 12' side is reduced by the rack shaft 1. and the pressure receiving area on the piston 12 side are kept the same.

このことは、ピストンをラック歯列・11′の両側に分
離設定したことによって、シリンダチューブ16と同1
5′との内径C1と02と’Kl” C+ < 02の
ように所望に応じて調定することを可能にしたもので、
これによってパルプ機構の前述のような複雑さを回避す
ると共に、第1図に示1したラックシャフト1の先端部
分1aの突出のための作動距離Q。を排除したものであ
る。従って全体としての必要スペースを従来のQ。×5
の長さからQ。×4の長さに短縮することを可能ならし
、めたものである。
This can be achieved by setting the pistons separately on both sides of the rack tooth row 11', so that they are the same as the cylinder tube 16.
5', the inner diameter C1 and 02 and 'Kl' can be adjusted as desired, such as C+ < 02.
This avoids the above-mentioned complexity of the pulp mechanism, and also reduces the working distance Q for the protrusion of the tip portion 1a of the rack shaft 1 shown in FIG. is excluded. Therefore, the overall required space is the same as the conventional Q. ×5
Q from the length of. This makes it possible to shorten the length to ×4.

この場合、ピストン12と同12′との間の空隙は低圧
室Cとなる。又前述のバルブ機構の簡素化から第4図に
示すピニオンシャフト14とケース15との間における
完全密封を回避することを容易にしたもので、従来にお
いてはギヤケース150段部15a部分における外部完
全シールが必要であったが、これを省略することに成功
したものである。
In this case, the gap between the piston 12 and the piston 12' becomes a low pressure chamber C. Furthermore, due to the simplification of the valve mechanism described above, it is easy to avoid complete sealing between the pinion shaft 14 and the case 15 shown in FIG. was necessary, but we succeeded in omitting this.

尚゛、第4図について更に詳述すれば同図はパルプ部分
の駆動機構を示すもので、16はスタブシャフト、19
はトーシヨンバーでピ/18を介してビニオンシャフト
14に連繋され、ビニオンシャフトの円板部14aには
複数個の遊星歯車20を軸支21し、該歯車20は固定
リングギヤ22に噛合すると共に内側の回転リングギヤ
26に噛合しである。
In addition, to explain in more detail about FIG. 4, this figure shows the drive mechanism of the pulp part, 16 is a stub shaft, 19 is
is connected to the binion shaft 14 via a pin/18 by a torsion bar, and a plurality of planetary gears 20 are pivotally supported 21 on the disk portion 14a of the binion shaft, and the gears 20 mesh with a fixed ring gear 22. It meshes with the inner rotating ring gear 26.

従ってピニオンシャフト140回動は、遊星歯車20に
公転と自転とを与え、この回転は回転リングギヤ23を
介してもう一組の遊星歯車24(これはスタブシャフト
16に軸支ネ5しである)を回動し、この遊星歯車24
は更に回転リングギヤ26を回動するようにしである。
Therefore, the rotation of the pinion shaft 140 causes the planetary gear 20 to revolve and rotate, and this rotation is transmitted via the rotating ring gear 23 to another set of planetary gears 24 (which is supported by the stub shaft 16 with the support screw 5). This planetary gear 24
further rotates the rotary ring gear 26.

こめ回転リングギヤ26には、油圧パルプ機構27に連
繋する作動子28が係合し、回転りフグギヤ260回動
が作動子28を介してバルブ機構27を働かせ、前述の
シリンダ室A、Bへの加圧。
An actuator 28 connected to a hydraulic pulp mechanism 27 is engaged with the rotary ring gear 26, and the rotation of the rotary puffer gear 260 operates the valve mechanism 27 via the actuator 28, and the above-mentioned cylinder chambers A and B are Pressurization.

減圧を行い、ハンドル(図示せず)操作に追随して、ラ
ックシャフト10を作動させるものである。
The rack shaft 10 is operated by reducing the pressure and following the operation of a handle (not shown).

以上のような構成からなる本発明゛においては、ラック
歯列11の両側に分割されたシリンダ室A。
In the present invention constructed as described above, the cylinder chamber A is divided on both sides of the rack tooth row 11.

Bへの圧力の増減によってラックシャフト10が左右に
移動されるもので、従来の単一のシ□リンダロ径を変化
することが不可能なものに対し、本発明はシリンダ室A
、Bが別個に形成配置されているものであるから、その
口径を互に変化させることが可能となり、ピストン12
,12′の夫々の受圧面積を同一にするように構成する
ことが容易である。実施例では、シリンダチューブ13
0口径をシリンダチューブ16′の口径よりも小さく形
成することによって、シリンダ室A内に全面開放された
ピストン12の受圧面積と、シリンダ室Bのように、シ
リンダ室内にラックシャフト10が貫通しているピスト
ン12′の受圧面積とを同一に設定することがきわめて
容易となった。
The rack shaft 10 is moved from side to side by increasing or decreasing the pressure in the cylinder chamber A. In contrast to the conventional system in which it is impossible to change the diameter of a single cylinder chamber, the present invention
, B are formed and arranged separately, so it is possible to change the diameters of the pistons 12 and 12.
, 12' can be easily configured to have the same pressure receiving area. In the embodiment, the cylinder tube 13
By making the zero diameter smaller than the diameter of the cylinder tube 16', the pressure receiving area of the piston 12 is completely opened in the cylinder chamber A, and the rack shaft 10 penetrates into the cylinder chamber like the cylinder chamber B. It has become extremely easy to set the pressure receiving area of the piston 12' to be the same as that of the piston 12'.

従って従来の如く、受圧面積の差によって生ずる不都合
を複雑なパルプ機構によって調整する必要が全くないこ
と\なシ、構造の簡易化を計り得ると共に円滑にして正
確な作動を実施し得る。
Therefore, there is no need to adjust the inconvenience caused by the difference in pressure receiving area with a complicated pulp mechanism as in the conventional case, and the structure can be simplified and smooth and accurate operation can be performed.

又前述の如くシリンダ室A、B及びピストン12’ 、
 12’をラックシャフト10のラック歯列11の両端
に設けることによって、全体の作動距離2を従来品より
も略丁短縮することが可能となったもので、それだけ車
体への組込みを容易とするものであり、更には、パルプ
機構の簡易化によるピニオンシャフト14における完全
シールを回避することによって、それだけ摩擦抵抗を減
少し、ハンドル操作を容易にする上で効果的である。
Also, as mentioned above, the cylinder chambers A, B and the piston 12',
12' at both ends of the rack tooth row 11 of the rack shaft 10, it is possible to shorten the overall working distance 2 by approximately 1 inch compared to the conventional product, which makes it easier to integrate into the vehicle body. Furthermore, by simplifying the pulp mechanism and avoiding a complete seal in the pinion shaft 14, it is effective in reducing frictional resistance and facilitating handle operation.

叙上の如く本発明パワーステアリング装置は、その構造
の簡易性による小型化及び耐久力の増大機能の向上によ
る操作の容易性等の優れた特徴を具有し、卓越したこの
種装置を提供し得たものである。
As described above, the power steering device of the present invention has excellent features such as miniaturization due to its simple structure, ease of operation due to improved durability, and can provide an outstanding device of this kind. It is something that

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

第1図は従来のパワーステアリング装置の一般的構造を
示す略図、第2図は同じ〈従来の装置の一実施例を示す
一部を切欠した断面図、第6図は本発明によるパワース
テアリング装置の要部を示す断面図、第4図はピニオン
シャフト部分の拡大断面図である。 10〜ラツクシヤフト  111〜ランク歯列12 、
12’〜ピストン 15 、 15’〜シリンダチューブ A、B〜シリンダ室  14〜ピニオンシヤフト15〜
ギヤケース 昭和56年9月24日 特許出願人  萱場工業株式会社
Fig. 1 is a schematic diagram showing the general structure of a conventional power steering device, Fig. 2 is a partially cutaway sectional view showing an embodiment of the same conventional device, and Fig. 6 is a power steering device according to the present invention. FIG. 4 is an enlarged sectional view of the pinion shaft portion. 10 ~ Luxury shaft 111 ~ Rank tooth row 12,
12'~Piston 15, 15'~Cylinder tube A, B~Cylinder chamber 14~Pinion shaft 15~
Gear case September 24, 1980 Patent applicant Kayaba Kogyo Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] ビニオンシャフトに連繋するラックシャフトに刻設した
ラック歯列の両端に夫々ピストンと該ピストンを収容す
るシリンダとを配設し、両シリンダの圧力差によってラ
ックシャフトを強制駆動するようにしたことを特徴、と
する自動車におけるパワーステアリング装置。
A piston and a cylinder accommodating the piston are disposed at both ends of a row of rack teeth carved into a rack shaft connected to a binion shaft, and the rack shaft is forcibly driven by the pressure difference between the two cylinders. Features: Power steering device for automobiles.
JP15185881A 1981-09-24 1981-09-24 Power steering gear of automobile Granted JPS5853567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15185881A JPS5853567A (en) 1981-09-24 1981-09-24 Power steering gear of automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15185881A JPS5853567A (en) 1981-09-24 1981-09-24 Power steering gear of automobile

Publications (2)

Publication Number Publication Date
JPS5853567A true JPS5853567A (en) 1983-03-30
JPH0150627B2 JPH0150627B2 (en) 1989-10-31

Family

ID=15527784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15185881A Granted JPS5853567A (en) 1981-09-24 1981-09-24 Power steering gear of automobile

Country Status (1)

Country Link
JP (1) JPS5853567A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193766A (en) * 1984-03-16 1985-10-02 Kayaba Ind Co Ltd Power steering apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506023A (en) * 1972-12-08 1975-01-22
JPS53116636A (en) * 1977-02-03 1978-10-12 Bendix Corp Rack and pinion power steering system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506023A (en) * 1972-12-08 1975-01-22
JPS53116636A (en) * 1977-02-03 1978-10-12 Bendix Corp Rack and pinion power steering system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193766A (en) * 1984-03-16 1985-10-02 Kayaba Ind Co Ltd Power steering apparatus

Also Published As

Publication number Publication date
JPH0150627B2 (en) 1989-10-31

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