JPH0226772Y2 - - Google Patents
Info
- Publication number
- JPH0226772Y2 JPH0226772Y2 JP1984172418U JP17241884U JPH0226772Y2 JP H0226772 Y2 JPH0226772 Y2 JP H0226772Y2 JP 1984172418 U JP1984172418 U JP 1984172418U JP 17241884 U JP17241884 U JP 17241884U JP H0226772 Y2 JPH0226772 Y2 JP H0226772Y2
- Authority
- JP
- Japan
- Prior art keywords
- rack
- steering
- bush
- held
- longitudinal direction
- 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.)
- Expired
Links
- 239000011247 coating layer Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、ラツクピニオン型舵取り装置におい
て、特にラツクをステアリングボデイ内で摺動自
在に支持するラツク支持構造の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rack and pinion type steering device, in particular to an improvement of a rack support structure for slidably supporting a rack within a steering body.
舵取り装置において、ラツクピニオン型のもの
は、その構造が比較的簡単でしかも小型、軽量化
を図れ、配設スペース的に有利であるばかりでな
く、舵取り性能面で優れている等の利点をもつも
のであり、近年では小型車を始めとして各種の車
輛等に広く搭載されるようになつている。
In terms of steering devices, rack and pinion type steering devices have the advantage of being relatively simple in structure, compact and lightweight, and not only are advantageous in terms of installation space, but also have excellent steering performance. In recent years, they have come to be widely installed in various vehicles, including small cars.
これを第4図に示したマニユアルステアリング
用としてのラツクピニオン型舵取り装置1を用い
て簡単に説明すると、図中符号2は図示せぬ舵取
ハンドルから延設されたステアリングシヤフト
で、その先端は符号3で示すステアリングボデイ
内に嵌入されるとともに、その先端に設けられた
ピニオンが車輛の操舵輪(共に図示せず)間に横
架された舵取リンク機構4を構成するラツク5の
ラツク歯5aに噛合されている。なお、図中6は
舵取リンク機構4の両端側に設けられ操舵輪側の
ピツトマンアーム側に連設されるキングピン、7
はこれに連結されたタイロツドで、左、右両側の
タイロツド7,7間に前記ラツク5がボールジヨ
イント7aを介して介在された状態で一連に設け
られている。また、3aは舵取リンク機構4を包
囲するように前記ステアリングボデイ3と一体的
に形成された筒状ハウジングで、車輛側に組付け
られる一対の取付ブラケツト8,8などを備えて
いるとともに、その両端側で前記タイロツド7と
の間には蛇腹状弾性筒体(ブーツ)9,9が配設
されてその部分からのシール性を確保するような
構成とされている。 To briefly explain this using the rack and pinion type steering device 1 for manual steering shown in FIG. Rack teeth of a rack 5 constituting a steering link mechanism 4 which is fitted into a steering body indicated by the reference numeral 3 and has a pinion provided at its tip that is suspended horizontally between steering wheels (both not shown) of the vehicle. It is meshed with 5a. In the figure, reference numeral 6 indicates a king pin provided at both ends of the steering link mechanism 4 and connected to the pitman arm on the steering wheel side;
is a tie rod connected to this, and the rack 5 is provided in series between the tie rods 7, 7 on both the left and right sides, with the rack 5 interposed via a ball joint 7a. Further, 3a is a cylindrical housing integrally formed with the steering body 3 so as to surround the steering link mechanism 4, and is equipped with a pair of mounting brackets 8, 8, etc. to be assembled on the vehicle side. Bellows-like elastic cylinders (boots) 9, 9 are disposed between the tie rod 7 on both ends thereof, and are configured to ensure sealing performance from these parts.
ところで、上述した構成による舵取り装置1に
おいて、タイロツド7と一連に連結されて舵取リ
ンク機構4を構成するラツク5は、そのラツク歯
5a形成部分がステアリングボデイ3の下方に配
設されたラツクガイド(図示せず)にて摺動自在
に支持されるとともに、他端側のロツド部5b部
分は、ステアリングボデイ3と一体の筒状ハウジ
ング3aの端部内に装填されたラツク支持用ブツ
シユ10にて摺動自在に支持されてなる構成とさ
れていた。 By the way, in the steering device 1 having the above-described structure, the rack 5 that is connected in series with the tie rod 7 to constitute the steering link mechanism 4 is a rack guide ( (not shown), and the rod portion 5b on the other end side is slidably supported by a rack support bushing 10 loaded into the end of the cylindrical housing 3a integrated with the steering body 3. It was designed to be supported in a freely movable manner.
しかしながら、上述したような従来のラツク支
持用ブツシユ10は、たとえば含油性焼結金属材
にて円筒状に形成したものを、前記ボデイ3側の
ハウジング3aの内孔内にその外方端から単に圧
入して嵌込み保持させ、さらにその外方端をリテ
イーナリング等で係止しているだけであるため、
このブツシユ10に自由度がなく、装置性能を確
保するうえでボデイハウジング3a等に厳しい加
工精度が要求され、加工性の面で問題を生じるも
のであつた。すなわち、この種の舵取り装置1に
おけるラツク5には、タイロツド7側との関連に
おいてかなりの揺動変位が加わるもので、このよ
うなラツク5を筒状を呈する剛体であるブツシユ
10で保持すると、ラツク5の揺動変位によつて
は点接触状態でブツシユ10と当接することとな
り、その結果ブツシユ10内径部と片当り状態と
なり易く、これら摺動部分での耐久性が低下する
等といつた問題を生じるものであつた。そして、
このようなラツク5とブツシユ10との関係によ
れば、無用な衝突により騒音等の発生を避けられ
ず、またラツク5の自由度が妨げられるため、そ
の適正な動作性能を維持するうえでも問題をもつ
もので、何らかの対策を講じることが望まれてい
る。
However, in the conventional rack support bushing 10 as described above, a cylindrical shape made of, for example, oil-impregnated sintered metal material is simply inserted into the inner hole of the housing 3a on the body 3 side from its outer end. Because it is simply press-fitted and retained, and the outer end is locked with a retainer ring, etc.
This bush 10 has no degree of freedom, and strict machining accuracy is required for the body housing 3a and the like in order to ensure device performance, resulting in problems in terms of machinability. That is, the rack 5 in this type of steering device 1 is subjected to considerable rocking displacement in relation to the tie rod 7 side, and when such a rack 5 is held by the bush 10, which is a rigid body having a cylindrical shape, Depending on the rocking displacement of the rack 5, the rack 5 may come into contact with the bush 10 in a point contact state, and as a result, it is likely to come into uneven contact with the inner diameter part of the bush 10, which may reduce the durability of these sliding parts. This caused problems. and,
According to the relationship between the rack 5 and the bush 10, it is impossible to avoid the generation of noise due to unnecessary collisions, and the degree of freedom of the rack 5 is hindered, which causes problems in maintaining its proper operating performance. Therefore, it is desirable that some kind of countermeasure be taken.
このような要請に応えるために、本考案に係る
舵取り装置におけるラツク支持構造は、ステアリ
ングボデイ内に一端部から装填して保持されるラ
ツク支持用ブツシユを、含油性焼結金属材にて円
筒状に形成するとともにその外周部に弾性被覆層
を形成し、かつその長手方向略中央部に対応する
ボデイ外側から内向きに打出された突部で長手方
向に揺動可能な状態で係止保持するようにしたも
のである。
In order to meet such demands, the rack support structure of the steering device according to the present invention includes a rack support bush that is loaded into the steering body from one end and held therein, and is made of oil-impregnated sintered metal material into a cylindrical shape. At the same time, an elastic coating layer is formed on the outer periphery of the body, and the body is locked and held so as to be able to swing in the longitudinal direction by a protrusion that is inwardly ejected from the outside of the body and corresponds to the approximately central portion in the longitudinal direction. This is how it was done.
本考案によれば、弾性被覆層が外周部に形成さ
れた円筒状を呈する含油性焼結金属材からなるラ
ツク支持用ブツシユを、ステアリングボデイ側の
内孔内に該ブツシユの長手方向略中央部に対応す
る部分で内向きに打出された突部にて長手方向に
沿つて揺動可能な状態で支持することができ、こ
れによりラツクをその揺動変位にかかわらず、該
ラツクと共に前記突部部分を支点として揺動され
るブツシユにて安定かつ適切に保持し、その適切
な摺動動作を維持し得るものである。
According to the present invention, a rack supporting bush made of oil-impregnated sintered metal material having a cylindrical shape and having an elastic coating layer formed on the outer periphery is inserted into an inner hole on the steering body side at approximately the center in the longitudinal direction of the bush. It is possible to support the rack in a swingable state along the longitudinal direction by a protrusion that is inwardly pushed out at a portion corresponding to the rack, so that the rack can be supported by the protrusion along with the rack regardless of its swinging displacement. The bushing can be held stably and appropriately by a bush that swings using the part as a fulcrum, and can maintain its proper sliding motion.
以下、本考案を図面に示した実施例を用いて詳
細に説明する。
Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.
第1図は本考案に係る舵取り装置におけるラツ
ク支持構造の一実施例を示し、これらの図におい
て、前述した第4図と同一または相当する部分に
は同一番号を付してその説明は省略する。 Fig. 1 shows an embodiment of the rack support structure in the steering device according to the present invention, and in these figures, the same or corresponding parts as in Fig. 4 described above are given the same numbers and the explanation thereof will be omitted. .
さて、本考案によれば、ステアリングボデイ3
側の筒状ハウジング3a内に一端部から装填して
保持されラツク5のロツド部5bを摺動自在に支
持するラツク支持用ブツシユ20を、含油性焼結
金属材等により円筒状に形成するとともにその外
周部にゴム等による弾性被覆層23を形成し、か
つボデイハウジング3aの内孔21内に装填した
際に、その長手方向略中央部に対応するボデイハ
ウジング3aの外側から内向きに打出された突部
22にて該ブツシユ20の長手方向において揺動
可能な状態で係止保持するようにしたところに特
徴を有している。 Now, according to the present invention, the steering body 3
A rack support bushing 20 that is loaded and held from one end into the side cylindrical housing 3a and slidably supports the rod portion 5b of the rack 5 is formed into a cylindrical shape from an oil-impregnated sintered metal material or the like. An elastic coating layer 23 made of rubber or the like is formed on the outer periphery of the body housing 3a, and when loaded into the inner hole 21 of the body housing 3a, it is punched inward from the outside of the body housing 3a corresponding to the approximately central portion in the longitudinal direction. The feature is that the bush 20 is locked and held in a swingable state in the longitudinal direction by a protrusion 22.
すなわち、本考案によれば、ボデイハウジング
3a内に装填されるブツシユ20を、このボデイ
ハウジング3a側に固定するために、その長手方
向略中央部で全周または周方向に所定間隔おいた
複数個所に内向きに打出された突部22を利用す
るように構成しており、しかもこのブツシユ20
の外周部にはゴム等による弾性被覆層23を予め
形成してなる構成としているため、このブツシユ
20を簡単かつ適切に装填して固定し得るととも
に、上述した突部22を支点としてブツシユ20
を長手方向に沿つて揺動可能に支持し、その自由
度を増大させることができ、これによりラツク5
を線接触状態で保持し、その安定した摺動動作を
適切に保証し得るものである。 That is, according to the present invention, in order to fix the bush 20 loaded in the body housing 3a to the body housing 3a side, the bush 20 is fixed at a plurality of locations around the entire circumference or at predetermined intervals in the circumferential direction approximately at the longitudinal center of the body housing 3a. It is configured so as to utilize a protrusion 22 that is inwardly punched out, and this protrusion 20
Since an elastic coating layer 23 made of rubber or the like is formed in advance on the outer periphery of the bushing 20, the bushing 20 can be easily and properly loaded and fixed, and the bushing 20 can be mounted using the above-mentioned protrusion 22 as a fulcrum.
It is possible to support the rack so that it can swing along the longitudinal direction, thereby increasing its degree of freedom.
can be held in a line contact state, and its stable sliding movement can be appropriately guaranteed.
また、このような構成によれば、従来のように
ブツシユ20を固定するためのリテーナリング等
を用いる必要がなく、ボデイハウジング3a側に
係止溝等を形成することが不要となり、これによ
りこのボデイハウジング3aを薄肉のパイプ体に
て形成することができ、加工性やコスト低減化を
図るうえで、その効果は大きい。さらに、上述し
た構成によれば、ボデイハウジング3a、ブツシ
ユ20、ラツク5等における加工精度を緩和する
ことも可能となり、成形加工面からその利点は大
きいものである。 Furthermore, with this configuration, there is no need to use a retainer ring or the like for fixing the bush 20 as in the conventional case, and there is no need to form a locking groove or the like on the body housing 3a side. The body housing 3a can be formed from a thin pipe body, which is highly effective in terms of workability and cost reduction. Further, according to the above-mentioned configuration, it is possible to reduce the machining accuracy of the body housing 3a, the bush 20, the rack 5, etc., which is a great advantage in terms of the molding process.
ここで、上述したボデイハウジング3a側から
の突部22の突出量は、前記ブツシユ20の内周
面側に影響を及ぼさない程度に設定されることは
勿論である。 Here, it goes without saying that the amount of protrusion of the protrusion 22 from the body housing 3a described above is set to such an extent that it does not affect the inner peripheral surface of the bush 20.
なお、本考案は、上述した実施例構造に限定さ
れず、各部の形状、構造等を必要に応じて適宜変
形、変更することは自由である。たとえば上述し
たラツク支持用ブツシユ20の内周面に対し、第
2図a,bに示すように周方向に所定間隔おいて
突出する樹脂材等からなる弾性体24群を複数列
並設して埋設するようにしたり、あるいは第3図
a,bに示すようにその長手方向に伸びたバー状
の弾性体25を埋設するようにすれば、ラツク5
に加わる揺動変位を適切かつ確実に吸収して弾性
的に保持することが可能となる。すなわち、この
ような構成によれば、ラツク5に加わる軽荷重は
ブツシユ20の内周面に埋設された弾性体24,
25による多面接触にて、大荷重はブツシユ20
自体の焼結材にて支持し、ラツク5を支持するに
あたつての自由度を大きくし得るとともに、各部
の寸法精度を軽減し、また金属同士の衝突による
騒音等を防止することも可能となる。 Note that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part may be modified and changed as necessary. For example, as shown in FIGS. 2a and 2b, a plurality of rows of elastic bodies 24 made of resin or the like that protrude at predetermined intervals in the circumferential direction are arranged in parallel on the inner peripheral surface of the rack support bushing 20 described above. If the rack 5 is buried, or if a bar-shaped elastic body 25 extending in the longitudinal direction is buried as shown in FIGS. 3a and 3b,
It becomes possible to appropriately and reliably absorb the rocking displacement applied to the structure and elastically hold it. That is, according to such a configuration, the light load applied to the rack 5 is absorbed by the elastic body 24 embedded in the inner peripheral surface of the bush 20.
Due to multi-sided contact with 25, large loads can be handled by 20 bushes.
By supporting the rack with its own sintered material, it is possible to increase the degree of freedom in supporting the rack 5, reduce the dimensional accuracy of each part, and also prevent noise caused by metal collisions. becomes.
また、上述した実施例では、本考案に係るラツ
ク支持構造を、マニユアルステアリング用の舵取
り装置に適用した場合を説明したが、本考案はこ
れに限定されず、パワーステアリング用の舵取り
装置にも適用できることは容易に理解されよう。 Further, in the above embodiment, the case where the rack support structure according to the present invention is applied to a steering device for manual steering is explained, but the present invention is not limited to this, and can also be applied to a steering device for power steering. It is easy to see what can be done.
〔考案の効果〕
以上説明したように、本考案に係る舵取り装置
におけるラツク支持構造によれば、ステアリング
ボデイ内に一端部から装填して保持されるラツク
支持用ブツシユを、含油性焼結金属材にて円筒状
に形成するとともにその外周部に弾性被覆層を形
成し、かつその長手方向略中央部に対応するボデ
イ外側から内向きに打出された突部にて該ブツシ
ユを長手方向に沿つて揺動可能な状態で係止保持
するようにしたので、簡単かつ安価な構成にもか
かわらず、このブツシユ自体の揺動動作によつて
ラツクをその揺動変位の如何にかかわらず、適正
かつ確実に嵌合保持し、その安定した摺動動作を
確保し得るもので、これにより従来のようなラツ
クの片当り等といつた問題は解消され、この摺動
部分での耐久性を焼結材によるブツシユにて大幅
に向上させることができ、またステアリングボデ
イ側での加工精度を緩和し、その加工性を向上さ
せ得る等といつた実用上種々優れた効果がある。[Effects of the invention] As explained above, according to the rack support structure of the steering device according to the present invention, the rack support bushing, which is loaded and held from one end into the steering body, is made of oil-impregnated sintered metal material. The bush is formed into a cylindrical shape, and an elastic coating layer is formed on the outer periphery of the bush, and a protrusion that is inwardly punched out from the outside of the body corresponds to the substantially central part of the bush in the longitudinal direction. Since it is designed to be locked and held in a swingable state, despite its simple and inexpensive structure, the swinging action of the bush itself allows the rack to be held properly and reliably regardless of its swinging displacement. It is possible to fit and hold the sliding part and ensure stable sliding movement.This eliminates problems such as uneven contact of the rack, and improves the durability of this sliding part by using sintered material. It has various practical effects such as being able to significantly improve the processing accuracy of the steering body, and also reducing the machining accuracy on the steering body side and improving its machinability.
第1図は本考案に係る舵取り装置におけるラツ
ク支持構造の一実施例を示す要部拡大断面図、第
2図a,bおよび第3図a,bはその変形例を示
すラツク支持用ブツシユの概略斜視図およびその
要部断面図、第4図は本考案を適用するマニユア
ルステアリング用のラツクピニオン型舵取り装置
の概略構成を示す概略図である。
1……ラツクピニオン型舵取り装置、3……ス
テアリングボデイ、3a……筒状ハウジング、4
……舵取リンク機構、5……ラツク、5a……ラ
ツク歯、5b……ロツド部、20……ラツク支持
用ブツシユ、21……ボデイ側内孔、22……内
向き突部、23……弾性体。
FIG. 1 is an enlarged cross-sectional view of the essential parts showing one embodiment of the rack support structure in the steering device according to the present invention, and FIGS. 2a, b and 3 a, b show modified examples of the rack support bushing. A schematic perspective view, a sectional view of a main part thereof, and FIG. 4 are schematic diagrams showing a schematic structure of a rack and pinion type steering device for manual steering to which the present invention is applied. 1... Rack and pinion type steering device, 3... Steering body, 3a... Tubular housing, 4
... Steering link mechanism, 5 ... Rack, 5a ... Rack teeth, 5b ... Rod portion, 20 ... Rack support bushing, 21 ... Body side inner hole, 22 ... Inward protrusion, 23 ... ...Elastic body.
Claims (1)
持されラツクを摺動自在に支持するラツク支持用
ブツシユを備え、このブツシユは、含油性焼結金
属材にて円筒状に形成されるとともにその外周部
に弾性被覆層を有し、かつその長手方向略中央部
に対応するボデイ外側から内向きに打出された突
部にて長手方向に揺動可能な状態で係止保持され
ていることを特徴とする舵取り装置におけるラツ
ク支持構造。 A rack support bushing is installed in the steering body from one end and is held to slidably support the rack. It is characterized by having an elastic coating layer and being held in place so as to be able to swing in the longitudinal direction by a protrusion that is inwardly ejected from the outside of the body and corresponds to the substantially central portion in the longitudinal direction. Rack support structure in steering gear.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1984172418U JPH0226772Y2 (en) | 1984-11-15 | 1984-11-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1984172418U JPH0226772Y2 (en) | 1984-11-15 | 1984-11-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6187774U JPS6187774U (en) | 1986-06-09 |
JPH0226772Y2 true JPH0226772Y2 (en) | 1990-07-20 |
Family
ID=30730084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1984172418U Expired JPH0226772Y2 (en) | 1984-11-15 | 1984-11-15 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0226772Y2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5402843B2 (en) * | 2010-06-16 | 2014-01-29 | 日本精工株式会社 | Rack shaft, manufacturing method thereof, and rack and pinion type steering gear unit |
JP2013019462A (en) * | 2011-07-11 | 2013-01-31 | Jtekt Corp | Rack bush, and rack shaft supporting structure |
CN109340256B (en) * | 2018-11-22 | 2024-06-11 | 浙江长盛塑料轴承技术有限公司 | Linear bearing system with pretension clearance eliminating function |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5187822U (en) * | 1975-01-11 | 1976-07-14 |
-
1984
- 1984-11-15 JP JP1984172418U patent/JPH0226772Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6187774U (en) | 1986-06-09 |
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