JP2000233759A - Rack pinion type steering device - Google Patents
Rack pinion type steering deviceInfo
- Publication number
- JP2000233759A JP2000233759A JP11034394A JP3439499A JP2000233759A JP 2000233759 A JP2000233759 A JP 2000233759A JP 11034394 A JP11034394 A JP 11034394A JP 3439499 A JP3439499 A JP 3439499A JP 2000233759 A JP2000233759 A JP 2000233759A
- Authority
- JP
- Japan
- Prior art keywords
- rack
- pinion
- housing
- steering device
- pinion type
- 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
Links
Landscapes
- Transmission Devices (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、操舵により回転す
るピニオンに噛み合うラックの移動により舵角を変化さ
せるラックピニオン式ステアリング装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rack-and-pinion type steering device that changes a steering angle by moving a rack that meshes with a pinion rotated by steering.
【０００２】[0002]
【従来の技術】操舵により回転するピニオンに噛み合う
ラックを覆うハウジングを備え、そのピニオンの回転に
よるラックの長手方向移動により舵角を変化させるラッ
クピニオン式ステアリング装置が従来から用いられてい
る。2. Description of the Related Art Conventionally, a rack and pinion type steering device is provided which has a housing which covers a rack which meshes with a pinion which is rotated by steering, and which changes a steering angle by longitudinal movement of the rack by rotation of the pinion.
【０００３】[0003]
【発明が解決しようとする課題】そのようなラックピニ
オン式ステアリング装置においては、ラックの両端に連
結される車輪を介して道路から作用する力により、ラッ
クが長手方向回りにツイスト運動をし、その結果ラック
の歯とピニオンの歯との衝突音が発生するという問題が
ある。In such a rack and pinion type steering device, the rack performs a twisting motion around the longitudinal direction by a force acting from the road via wheels connected to both ends of the rack, and the rack and pinion type steering device has a As a result, there is a problem that a collision sound between the teeth of the rack and the teeth of the pinion is generated.
【０００４】本発明は、上記問題を解決することのでき
るラックピニオン式ステアリング装置を提供することを
目的とする。An object of the present invention is to provide a rack and pinion type steering device which can solve the above-mentioned problems.
【０００５】[0005]
【課題を解決するための手段】本発明は、操舵により回
転するピニオンと、そのピニオンに噛み合うラックと、
そのラックを覆うハウジングとを備え、そのラックは、
そのハウジングにより一端側と他端側とにおいて円筒面
に沿う支持面を介して、そのピニオンの回転により長手
方向に案内されるように支持され、そのラックの長手方
向移動により舵角を変化させるラックピニオン式ステア
リング装置において、そのラックの一端側を支持する支
持面の軸心は他端側を支持する支持面の軸心に対して偏
心していることを特徴とする。本発明の構成によれば、
ラックは一端側と他端側において支持面を介して長手方
向に案内され、かつ、その一端側の支持面の軸心は他端
側の支持面の軸心に対して偏心するので、その長手方向
回りのラックのツイスト運動は規制される。SUMMARY OF THE INVENTION The present invention provides a pinion rotated by steering, a rack meshing with the pinion,
And a housing that covers the rack,
A rack that is supported by the housing at one end and the other end via support surfaces along a cylindrical surface so as to be guided in the longitudinal direction by rotation of the pinion, and that changes the steering angle by moving the rack in the longitudinal direction. In the pinion type steering device, an axis of a support surface supporting one end of the rack is eccentric with respect to an axis of a support surface supporting the other end. According to the configuration of the present invention,
The rack is guided in the longitudinal direction through the support surface at one end and the other end, and the axis of the support surface at one end is eccentric with respect to the axis of the support surface at the other end. The twist movement of the rack around the direction is restricted.
【０００６】[0006]
【発明の実施の形態】図１、図２に示す車両用ラックピ
ニオン式油圧パワーステアリング装置１は、ステアリン
グホイールに連結されるステアリングシャフト２と、操
舵により回転するヘリカルピニオン７と、このピニオン
７に噛み合うヘリカルラック８と、このラック８を覆う
ハウジング１０とを備えている。そのハウジング１０
は、バルブハウジング１０ａと、このバルブハウジング
１０ａに一体化されるラックハウジング１０ｂとを有す
る。そのラックハウジング１０ｂの一端側開口１０ｂ′
と他端開口１０ｂ″から突出するラック８の一端部と他
端部は、ボールジョイント４４ａ、４４ｂ、タイロッド
４５ａ、４５ｂを介して車輪（図示省略）に連結され
る。そのラックハウジング１０ｂの各端部外周と各タイ
ロッド４５の外周との間は、それぞれ伸縮カバー４６に
より覆われる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rack and pinion type hydraulic power steering device 1 for a vehicle shown in FIGS. 1 and 2 has a steering shaft 2 connected to a steering wheel, a helical pinion 7 rotated by steering, and A helical rack 8 that meshes with the housing 8 is provided. Its housing 10
Has a valve housing 10a and a rack housing 10b integrated with the valve housing 10a. One end side opening 10b 'of the rack housing 10b
And the other end of the rack 8 protruding from the other end opening 10b "are connected to wheels (not shown) via ball joints 44a, 44b and tie rods 45a, 45b. Each end of the rack housing 10b The space between the outer periphery of the portion and the outer periphery of each tie rod 45 is covered by a telescopic cover 46.
【０００７】そのラックハウジング１０ｂの一端側は円
筒状のシリンダとされ、このシリンダの内周とラック８
の外周との間を油密状にシールする一対のシール機構１
８ａ、１８ｂが設けられている。両シール機構１８ａ、
１８ｂの間においてラック８の外周にピストン２０が取
り付けられている。両シール機構１８ａ、１８ｂの間は
ピストン２０によって仕切られる一対の油室２１、２２
とされ、これにより操舵補助力発生用油圧シリンダ１８
が構成されている。各油室２１、２２に、上記バルブハ
ウジング１０ａに内蔵される油圧制御弁が配管１９ａ、
１９ｂを介して接続されている。その油圧制御弁は、操
舵抵抗に応じてポンプＰから吐出される圧油を油室２
１、２２の一方に送り、油室２１、２２の他方から排出
される油をタンクＴに送る公知のものを用いることがで
きる。これにより、そのピストン２０に作用する油圧に
基づき操舵補助力が付与される。One end of the rack housing 10b is a cylindrical cylinder, and the inner periphery of the cylinder and the rack 8
A pair of seal mechanisms 1 for sealing oil-tightly between the outer periphery of
8a and 18b are provided. Both sealing mechanisms 18a,
A piston 20 is attached to the outer periphery of the rack 8 between 18b. A pair of oil chambers 21 and 22 partitioned by a piston 20 between the two seal mechanisms 18a and 18b.
As a result, the steering assist force generating hydraulic cylinder 18
Is configured. In each of the oil chambers 21 and 22, a hydraulic control valve built in the valve housing 10a is provided with a pipe 19a,
19b. The hydraulic control valve supplies pressure oil discharged from the pump P in accordance with the steering resistance to the oil chamber 2.
1 and 22, and a known oil that sends oil discharged from the other of the oil chambers 21 and 22 to the tank T can be used. As a result, a steering assist force is applied based on the hydraulic pressure acting on the piston 20.
【０００８】そのラックハウジング１０ｂの一端側の内
周に円筒状のブッシュ３１が挿入され、そのブッシュ３
１の内周面がラック８の一端側の外周を支持する支持面
３１ａを構成する。また、そのラックハウジング１０ｂ
の他端側の内周に円筒状のブッシュ３２が挿入され、そ
のブッシュ３２の内周面がラック８の他端側の外周を支
持する支持面３２ａを構成する。なお、本実施形態で
は、その一方のブッシュ３１はラックハウジング１０ｂ
の内周に固定されるストッパー３５により抜けが防止さ
れ、その他方のブッシュ３２はラックハウジング１０ｂ
の内周に例えば圧入されることで抜けが防止される。ま
た、その一端側のブッシュ３１は、その内周と外周とに
オイルシール４１とシールリング４２とが嵌め合わされ
ることで、上記一方のシール機構１８ａを構成する。A cylindrical bush 31 is inserted into the inner periphery of one end of the rack housing 10b.
The inner peripheral surface 1 constitutes a support surface 31 a that supports the outer periphery at one end of the rack 8. Also, the rack housing 10b
A cylindrical bush 32 is inserted into the inner periphery of the other end of the rack 8, and the inner peripheral surface of the bush 32 forms a support surface 32 a that supports the outer periphery of the other end of the rack 8. In the present embodiment, one bush 31 is connected to the rack housing 10b.
Is prevented by a stopper 35 fixed to the inner periphery of the rack housing 10b.
For example, by being press-fitted into the inner circumference of the, it is prevented from coming off. The bush 31 on one end side has the oil seal 41 and the seal ring 42 fitted on the inner and outer circumferences thereof, thereby constituting the one seal mechanism 18a.
【０００９】そのラック８は例えば鍛造により成形さ
れ、一端側と他端側とが円筒面に沿う外周面を有する被
支持部とされる。その一方の支持面３１ａにより支持さ
れるラック８の一端側の被支持部に外接する円の径は、
ラック８の長手方向移動が阻止されない程度に支持面３
１ａの径よりも僅かに小径とされ、その径の差はラック
８等の部品加工公差や組み立て公差に応じて定められ
る。同様に、その他方の支持面３２ａにより支持される
ラック８の他端側の被支持部に外接する円の径は、ラッ
ク８の長手方向移動が阻止されない程度にその支持面３
２ａの径よりも僅かに小径とされ、その径の差はラック
８等の部品加工公差や組み立て公差に応じて定められ
る。これによりラック８は、ラックハウジング１０ｂに
より一端側と他端側とにおいて円筒面に沿う支持面３１
ａ、３２ａを介して、そのピニオン７の回転により長手
方向に案内されるように支持され、そのラック８の長手
方向移動により舵角を変化させる。The rack 8 is formed by forging, for example, and one end and the other end are supported portions having an outer peripheral surface along a cylindrical surface. The diameter of a circle circumscribing the supported portion at one end of the rack 8 supported by the one support surface 31a is
The support surface 3 is of such an extent that the longitudinal movement of the rack 8 is not impeded.
The diameter is slightly smaller than the diameter of 1a, and the difference between the diameters is determined according to the tolerance of processing the parts of the rack 8 and the like and the tolerance of assembly. Similarly, the diameter of the circle circumscribing the supported portion at the other end of the rack 8 supported by the other support surface 32a is such that the longitudinal movement of the rack 8 is not prevented.
The diameter is slightly smaller than the diameter of 2a, and the difference in the diameter is determined in accordance with the tolerance of processing the parts such as the rack 8 and the tolerance of assembly. As a result, the rack 8 is supported by the rack housing 10b on one end and the other end along the cylindrical surface.
The rack 8 is supported so as to be guided in the longitudinal direction by the rotation of the pinion 7 through a and 32a, and the steering angle is changed by the longitudinal movement of the rack 8.
【００１０】図３、図４に示すように、そのラック８の
一端側を支持する支持面３１ａの軸心３１ａ′は他端側
を支持する支持面３２ａの軸心３２ａ′に対して偏心す
る。その偏心量ｅに対応する量だけラック８の一端側の
被支持部の軸心は他端側の被支持部の軸心に対して偏心
している。本実施形態では、ラックハウジング１０ｂの
一端側開口１０ｂ′の中心と、他端開口１０ｂ″の中心
と、一方の支持面３１ａの軸心３１ａ′と、ラック８の
一端側の被支持部の軸心と、両ボールジョイント４４
ａ、４４ｂの中心とが同一直線上に配置可能とされ、他
方の支持面３２ａの軸心３２ａ′とラック８の他端側の
被支持部の軸心とが同一直線上に配置可能とされてい
る。そのため、上記偏心量ｅだけ、他方のブッシュ３２
の内周の中心は外周の中心に対して偏心され、また、ラ
ック８の中間部に段差部８ａが設けられることでラック
８の一端側の軸心は他端側の軸心に対して偏心される。
その偏心量ｅは、ラック８の長手方向回りの回転を、両
支持面３１ａ、３２ａによりラック８の両被支持部を拘
束することで規制できれば特に限定されない。As shown in FIGS. 3 and 4, the axis 31a 'of the support surface 31a supporting one end of the rack 8 is eccentric with respect to the axis 32a' of the support surface 32a supporting the other end. . The axis of the supported portion at one end of the rack 8 is eccentric with respect to the axis of the supported portion at the other end by an amount corresponding to the eccentricity e. In the present embodiment, the center of the opening 10b 'on one end side of the rack housing 10b, the center of the opening 10b "on the other end, the axis 31a' of the one support surface 31a, and the axis of the supported portion on one end side of the rack 8 Heart and both ball joint 44
The centers of a and 44b can be arranged on the same straight line, and the axis 32a 'of the other support surface 32a and the axis of the supported portion at the other end of the rack 8 can be arranged on the same line. ing. Therefore, the other bush 32 only has the eccentricity e.
The center of the inner circumference of the rack 8 is eccentric with respect to the center of the outer circumference, and the step 8a is provided in the middle of the rack 8 so that the axis of one end of the rack 8 is eccentric with respect to the axis of the other end. Is done.
The amount of eccentricity e is not particularly limited as long as rotation around the longitudinal direction of the rack 8 can be regulated by restraining both supported portions of the rack 8 by the two support surfaces 31a and 32a.
【００１１】上記構成によれば、ラック８は一端側と他
端側において支持面３１ａ、３２ａを介して長手方向に
案内され、かつ、その一端側の支持面３１ａの軸心３１
ａ′は他端側の支持面３２ａの軸心３２ａ′に対して偏
心するので、車輪を介して道路から力が作用してもラッ
ク８が長手方向回りにツイスト運動をするのを規制でき
る。これにより、ラック８の歯８′とピニオン７の歯と
の衝突音が発生するのを防止できる。According to the above configuration, the rack 8 is guided in the longitudinal direction at the one end and the other end via the support surfaces 31a and 32a, and the axial center 31 of the support surface 31a at one end is provided.
Since a 'is eccentric with respect to the axis 32a' of the support surface 32a on the other end side, it is possible to restrict the rack 8 from twisting around the longitudinal direction even when a force is applied from the road through the wheels. As a result, it is possible to prevent the sound of collision between the teeth 8 'of the rack 8 and the teeth of the pinion 7.
【００１２】本発明は上記実施形態に限定されない。例
えば、本発明をマニュアルタイプのラックピニオン式ス
テアリング装置に適用してもよい。また、ラックの被支
持部の外周面は円筒面に沿う必要はなく、例えば横断面
が楕円形であってもよい。The present invention is not limited to the above embodiment. For example, the present invention may be applied to a manual type rack and pinion type steering device. Further, the outer peripheral surface of the supported portion of the rack does not need to follow the cylindrical surface, and may have, for example, an elliptical cross section.
【００１３】[0013]
【発明の効果】本発明によれば、ラックの歯とピニオン
の歯との衝突音の発生を防止できるラックピニオン式ス
テアリング装置を提供できる。According to the present invention, it is possible to provide a rack and pinion type steering device capable of preventing the generation of collision noise between the teeth of the rack and the teeth of the pinion.
【図１】本発明の実施形態のラックピニオン式ステアリ
ング装置の一部破断正面図FIG. 1 is a partially cutaway front view of a rack and pinion type steering device according to an embodiment of the present invention.
【図２】本発明の実施形態のラックピニオン式ステアリ
ング装置の部分断面図FIG. 2 is a partial cross-sectional view of a rack and pinion type steering device according to an embodiment of the present invention.
【図３】本発明の実施形態のラックピニオン式ステアリ
ング装置における要部の構成説明図FIG. 3 is an explanatory diagram of a configuration of a main part in a rack and pinion type steering device according to an embodiment of the present invention.
【図４】本発明の実施形態のラックピニオン式ステアリ
ング装置における要部の断面図FIG. 4 is a sectional view of a main part of the rack and pinion type steering device according to the embodiment of the present invention;
１ ラックピニオン式油圧パワーステアリング装置 ７ ピニオン ８ ラック １０ｂ ラックハウジング ３１ａ、３２ａ 支持面 DESCRIPTION OF SYMBOLS 1 Rack and pinion type hydraulic power steering device 7 Pinion 8 Rack 10b Rack housing 31a, 32a Support surface
Claims (1)
ニオンに噛み合うラックと、そのラックを覆うハウジン
グとを備え、そのラックは、そのハウジングにより一端
側と他端側とにおいて円筒面に沿う支持面を介して、そ
のピニオンの回転により長手方向に案内されるように支
持され、そのラックの長手方向移動により舵角を変化さ
せるラックピニオン式ステアリング装置において、その
ラックの一端側を支持する支持面の軸心は他端側を支持
する支持面の軸心に対して偏心していることを特徴とす
るラックピニオン式ステアリング装置。The present invention comprises a pinion that is rotated by steering, a rack that meshes with the pinion, and a housing that covers the rack. The rack has a support surface along a cylindrical surface at one end and the other end by the housing. In the rack-and-pinion type steering device, which is supported so as to be guided in the longitudinal direction by the rotation of the pinion and changes the steering angle by the longitudinal movement of the rack, an axis of a support surface for supporting one end of the rack is provided. A rack and pinion type steering device wherein the center is eccentric with respect to the axis of a support surface supporting the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03439499A JP3742241B2 (en) | 1999-02-12 | 1999-02-12 | Rack and pinion steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03439499A JP3742241B2 (en) | 1999-02-12 | 1999-02-12 | Rack and pinion steering system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000233759A true JP2000233759A (en) | 2000-08-29 |
| JP3742241B2 JP3742241B2 (en) | 2006-02-01 |
Family
ID=12412974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03439499A Expired - Fee Related JP3742241B2 (en) | 1999-02-12 | 1999-02-12 | Rack and pinion steering system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3742241B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844582A (en) * | 2009-03-27 | 2010-09-29 | 蒂森克鲁伯普雷斯塔股份公司 | Rack-and-pinion steering gear with low cost |
| EP2444298A1 (en) | 2010-10-21 | 2012-04-25 | JTEKT Corporation | Motor vehicle steering system |
-
1999
- 1999-02-12 JP JP03439499A patent/JP3742241B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844582A (en) * | 2009-03-27 | 2010-09-29 | 蒂森克鲁伯普雷斯塔股份公司 | Rack-and-pinion steering gear with low cost |
| EP2233381A1 (en) * | 2009-03-27 | 2010-09-29 | ThyssenKrupp Presta AG | Cost-effective gear rack steering gear |
| EP2444298A1 (en) | 2010-10-21 | 2012-04-25 | JTEKT Corporation | Motor vehicle steering system |
| JP2012106720A (en) * | 2010-10-21 | 2012-06-07 | Jtekt Corp | Vehicle steering device |
| US8827031B2 (en) | 2010-10-21 | 2014-09-09 | Jtekt Corporation | Motor vehicle steering system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3742241B2 (en) | 2006-02-01 |
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| Date | Code | Title | Description |
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