JP2012188100A - Rack-and-pinion steering device - Google Patents

Rack-and-pinion steering device Download PDF

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JP2012188100A
JP2012188100A JP2011066114A JP2011066114A JP2012188100A JP 2012188100 A JP2012188100 A JP 2012188100A JP 2011066114 A JP2011066114 A JP 2011066114A JP 2011066114 A JP2011066114 A JP 2011066114A JP 2012188100 A JP2012188100 A JP 2012188100A
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housing
pinion
rack
shaft
bearing
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Yoshio Nakata
佳生 仲田
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JTEKT Corp
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JTEKT Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a rack-and-pinion steering device adapted to high torque without enlarging a pinion housing.SOLUTION: This rack-and-pinion steering device includes: a bottomed cylindrical housing 2; a screw portion 21 formed around the periphery of the opening of the housing 2; a rack shaft 6 provided inside of the housing 2; a pinion shaft 5 having a pinion engaged with the rack shaft 6; a bearing 3 held by the housing 2, rotatably supporting the pinion shaft 5, and provided with an outer ring 27 and an inner ring 28; and a screw member 22 threadedly engaged with the screw portion 21 of the housing 2. The axially downward movement of the outer ring 27 by the housing 2 and screw member 22 is restricted by the screw member 22.

Description

本発明は、ラックアンドピニオン式ステアリング装置に関するものである。   The present invention relates to a rack and pinion type steering apparatus.

自動車の操舵装置である電動パワーステアリング装置は、ラックピニオン式ステアリング機構が採用されており、最近、省エネ燃費向上のため、多くの車に採用されてきている。特に、大型車向けの電動パワーステアリング装置は小型軽量で高トルク化の要求が高い。大型車向けの電動パワーステアリング装置においては、ピニオン軸への負荷が増大するため、ピニオン軸を支持するピニオンハウジングも大型化の傾向がある。その場合、例えば特許文献１（図面３）に提案されているように、ピニオン軸を筒状のハウジング内に回転可能に支持する軸受を、ハウジング上部の入口にてトッププラグでねじ止めすることにより、高トルク化に対応されている。   A rack and pinion type steering mechanism is adopted as an electric power steering device which is a steering device of an automobile, and recently, it has been adopted in many cars in order to improve energy saving and fuel consumption. In particular, electric power steering devices for large vehicles are highly demanded to be small and light and have high torque. In an electric power steering apparatus for a large vehicle, since the load on the pinion shaft increases, the pinion housing that supports the pinion shaft also tends to increase in size. In that case, for example, as proposed in Patent Document 1 (Drawing 3), a bearing that rotatably supports the pinion shaft in a cylindrical housing is screwed with a top plug at the inlet of the upper portion of the housing. , Corresponding to higher torque.

特開２００５−１４８１５号公報Japanese Patent Laid-Open No. 2005-14815

しかしながら、ピニオンハウジングにトッププラグを使用する場合、ピニオン軸方向にトッププラグの長さを長くして、螺着力を増すことで、操舵時のピニオン軸への負荷増大に対応できるが、ピニオンハウジングが大型化するため、特に、ピニオン軸方向の車両搭載レイアウトが不利になる。本発明は上記課題に鑑みてなされたものであり、ピニオンハウジングを大型化することなく、高トルク化に対応できるラックアンド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。   However, when a top plug is used for the pinion housing, the length of the top plug is increased in the direction of the pinion shaft, and the screwing force is increased to cope with an increase in load on the pinion shaft during steering. Since the size is increased, the vehicle mounting layout in the pinion axis direction is particularly disadvantageous. The present invention has been made in view of the above problems, and an object of the present invention is to provide a rack and pinion type steering device that can cope with an increase in torque without increasing the size of the pinion housing.

上記課題を解決するために、請求項１に記載の発明は、有底筒状のハウジングと、このハウジングの開口部の外周に形成されたねじ部と、前記ハウジング内に設けられたラック軸と、このラック軸と噛み合うピニオンを有するピニオン軸と、前記ハウジングにより保持されピニオン軸を回転可能に支持する軸受と、この軸受は外輪と内輪を備え、前記ハウジングの前記ねじ部に螺着するねじ部材と、このねじ部材により、前記外輪を前記ハウジングと前記ねじ部材により軸方向下方への移動を規制したことを要旨としている。   In order to solve the above-described problems, the invention described in claim 1 includes a bottomed cylindrical housing, a screw portion formed on the outer periphery of the opening of the housing, and a rack shaft provided in the housing. A pinion shaft having a pinion that meshes with the rack shaft, a bearing that is supported by the housing and rotatably supports the pinion shaft, and the bearing includes an outer ring and an inner ring, and a screw member that is screwed onto the threaded portion of the housing The gist of the invention is that the screw member restricts the outer ring from moving downward in the axial direction by the housing and the screw member.

本発明の構造によれば、ハウジングの上部入口の外周のねじ部に螺着されたねじ部材が、その本体の内周から径方向内方に突出する規制部によって軸受を規制しているため、前記軸受の抜脱を防止するための前記規制部は軸方向の長さは短くてよく、ハウジングおよび、ピニオン軸の長さを小さくでき、ピニオン軸方向の小型化を図ることができるため、省スペースで高トルクを支持することができる。   According to the structure of the present invention, the screw member screwed to the outer peripheral thread portion of the upper inlet of the housing regulates the bearing by the restricting portion protruding radially inward from the inner periphery of the main body. The restriction portion for preventing the bearing from being pulled out may be short in the axial direction, the housing and the pinion shaft can be reduced in length, and the pinion axial direction can be reduced. High torque can be supported in space.

さらに、請求項２に記載の発明は、前記規制部の最小内径は、内輪の外径よりも小さくされていることを要旨としている。
即ち、その場合、規制部によって保持器の抜脱を防止できるので、軸受およびピニオン軸の抜脱を確実に防止することができるとともに、軸受のカバーとして、軸受への異物の侵入および、軸受の潤滑グリースの漏れを防止するシールの効果を有し軸受の密封性がよく軸受の耐久性の向上ができる。 Furthermore, the gist of the invention described in claim 2 is that the minimum inner diameter of the restricting portion is smaller than the outer diameter of the inner ring.
That is, in this case, the retainer can be prevented from being pulled out by the restricting portion, so that the bearing and the pinion shaft can be reliably prevented from being pulled out. It has the effect of sealing to prevent leakage of lubricating grease, and the sealing performance of the bearing is good and the durability of the bearing can be improved.

請求項３に記載の発明は、前記ねじ部材の内周に保持され、前記ねじ部材の内周と前記ピニオン軸の外周との間を封止する環状のシール部材を備え、前記規制部によって前記シール部材の軸方向下方への移動を規制されていることを要旨としている。その場合、ピニオン軸の撓みが少ないため、簡易な構造のシールでよくシールの小形化が可能となるため、ねじ部材およびシール部材を一体的なユニットとして取り扱うことができ、従って、システムの小型化が可能となり、小スペースで高トルクを支持することができるラックアンドピニオン式ステアリング装置ができる。   The invention according to claim 3 includes an annular seal member that is held on the inner periphery of the screw member and seals between the inner periphery of the screw member and the outer periphery of the pinion shaft, The gist is that movement of the sealing member in the axial direction downward is restricted. In that case, since the pinion shaft is less bent, it is possible to reduce the size of the seal with a simple seal, and the screw member and the seal member can be handled as an integral unit. Thus, a rack and pinion type steering device capable of supporting high torque in a small space can be obtained.

本発明の構造によれば、ハウジングの上部の入口のねじ部に螺着されたねじ部材が、ピニオン軸を回転可能にする軸受の外輪の上端を押圧する環状の本体を備えており、その本体の内周から径方向内方に突出する規制部によって、上記軸受の抜脱を防止することができる。ハウジングの外周部で螺着されているため、軸方向の小型化を図ることが出来ると共に、ねじ部材により、システムの小型化が可能となり、小スペースで高トルクを支持することができるラックアンドピニオン式ステアリング装置ができる。   According to the structure of the present invention, the screw member screwed to the screw portion of the inlet at the upper part of the housing includes the annular main body that presses the upper end of the outer ring of the bearing that allows the pinion shaft to rotate, and the main body. The above-mentioned bearing can be prevented from being pulled out by the restricting portion protruding radially inward from the inner periphery of the bearing. Since it is screwed on the outer periphery of the housing, it can be downsized in the axial direction, and the screw member enables downsizing of the system, and rack and pinion that can support high torque in a small space Type steering device.

本発明の一実施の形態の車両用操舵装置の要部の断面図である。It is sectional drawing of the principal part of the steering apparatus for vehicles of one embodiment of this invention. ねじ部材の断面図（a）および側面図（ｂ）である。It is sectional drawing (a) and a side view (b) of a screw member. 従来構造の車両用操舵装置の要部の断面図である。It is sectional drawing of the principal part of the steering apparatus for vehicles of the conventional structure.

本発明の好ましい実施の形態について添付図面を参照しながら説明する。図１は本発明の一実施形態に係る車両用操舵装置の要部を示す概略断面図である。
図１を参照して、車両用操舵装置１は、ラックアンドピニオン式の操舵装置である。車両用操舵装置１は、筒状のピニオンハウジング２と、ピニオンハウジング２によって第１の軸受３および第２の軸受４を介して回転可能に支持されたピニオン軸５と、ピニオン軸５のピニオン５ａに噛み合うラック歯６ａを有するラック軸６とを備えている。ピニオン軸５およびラック軸６によって、転舵機構としてのラックアンドピニオン機構７が構成されている。 Preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing a main part of a vehicle steering apparatus according to an embodiment of the present invention.
Referring to FIG. 1, a vehicle steering apparatus 1 is a rack and pinion type steering apparatus. A vehicle steering apparatus 1 includes a cylindrical pinion housing 2, a pinion shaft 5 rotatably supported by the pinion housing 2 via a first bearing 3 and a second bearing 4, and a pinion 5a of the pinion shaft 5. And a rack shaft 6 having rack teeth 6a meshing with each other. The pinion shaft 5 and the rack shaft 6 constitute a rack and pinion mechanism 7 as a turning mechanism.

ピニオン軸５は、例えばステアリングホイールからなる操舵部材８とは、ステアリングシャフト９ａおよび中間部材９ｂを介して同行回転可能に連結されている。ラック軸６は、ピニオンハウジング２とは交差状に連結された図示しない筒状のラックハウジングによって、軸長方向（紙面に直交する方向）に移動可能に支持されている。図示していないが、ラック軸６の両端部は、タイロッドを介して転舵輪に連結されており、操舵部材８の回転に伴って、ラック軸６が軸長方向に移動し操向が行われるようになっている。   The pinion shaft 5 is connected to a steering member 8 made of, for example, a steering wheel so as to be able to rotate along with the steering shaft 9a and an intermediate member 9b. The rack shaft 6 is supported by a cylindrical rack housing (not shown) connected in a crossing manner with the pinion housing 2 so as to be movable in the axial direction (direction perpendicular to the paper surface). Although not shown, both ends of the rack shaft 6 are coupled to the steered wheels via tie rods, and the rack shaft 6 moves in the axial length direction as the steering member 8 rotates, and steering is performed. It is like that.

ピニオンハウジング２には、ラック軸６を隔ててピニオン軸５とは反対側に筒状のサポートハウジング１０が設けられており、そのサポートハウジング１０に、ラック軸支持装置１１が取り付けられている。ラック軸支持装置１１は、サポートハウジング１０内に前後に進退可能に収容された支持部材としての円筒状のサポートヨーク１２と、サポートハウジング１０の入口のねじ部１０ａに固定された封止部材１３と、サポートヨーク１２と封止部材１３との間に介在し、サポートヨーク１２を介してラック軸６をピニオン軸５に向けて付勢する例えば圧縮コイルばねからなる付勢部材１４とを備えている。   The pinion housing 2 is provided with a cylindrical support housing 10 on the opposite side of the pinion shaft 5 across the rack shaft 6, and a rack shaft support device 11 is attached to the support housing 10. The rack shaft support device 11 includes a cylindrical support yoke 12 as a support member accommodated in the support housing 10 so as to be able to advance and retreat back and forth, and a sealing member 13 fixed to a screw portion 10a at the entrance of the support housing 10. And a biasing member 14 made of, for example, a compression coil spring, which is interposed between the support yoke 12 and the sealing member 13 and biases the rack shaft 6 toward the pinion shaft 5 via the support yoke 12. .

サポートヨーク１２の前面１２ａには、ラック軸６を軸長方向に摺動自在に支持する凹部１５が形成されている。その凹部１５には、ラック軸６に摺接する低摩擦部材からなるパッド１６が取り付けられている。
封止部材１３の前面１３ａとサポートヨーク１２の後面１２ｂとの間には、所定の隙間Ｓが形成されている。その隙間Ｓの量は、封止部材１３のねじ込み位置の調整により、例えば０．１ｍｍのように厳密に調整されている。 The front surface 12a of the support yoke 12 is formed with a recess 15 that supports the rack shaft 6 so as to be slidable in the axial direction. A pad 16 made of a low friction member that is in sliding contact with the rack shaft 6 is attached to the recess 15.
A predetermined gap S is formed between the front surface 13 a of the sealing member 13 and the rear surface 12 b of the support yoke 12. The amount of the gap S is strictly adjusted, for example, to 0.1 mm by adjusting the screwing position of the sealing member 13.

サポートヨーク１２の外周面に形成された一対の周溝に、例えばＯリングからなる環状の弾性部材１７がそれぞれ収容され、これら弾性部材１７が、サポートハウジング１０の内周に弾性的に接触することにより、サポートヨーク１２を径方向に弾性支持し、サポートヨーク１２のがたつきを防止している。
封止部材１３の後面１３ｂには、封止部材１３を回動操作する工具に係合するための、例えば断面多角形形状の工具係合孔１８が形成されている。 An annular elastic member 17 made of, for example, an O-ring is accommodated in a pair of circumferential grooves formed on the outer peripheral surface of the support yoke 12, and these elastic members 17 elastically contact the inner periphery of the support housing 10. Thus, the support yoke 12 is elastically supported in the radial direction to prevent the support yoke 12 from rattling.
On the rear surface 13b of the sealing member 13, for example, a tool engagement hole 18 having a polygonal cross section for engaging with a tool for rotating the sealing member 13 is formed.

ピニオンハウジング２は、ピニオン軸５の下部を収容するための収容孔１９を有している。収容孔１９の入口２０の外周には、ねじ部２１が形成され、そのねじ部２１に、環状のねじ部材２２がキャップとしてねじ込まれている。   The pinion housing 2 has an accommodation hole 19 for accommodating the lower part of the pinion shaft 5. A screw portion 21 is formed on the outer periphery of the inlet 20 of the accommodation hole 19, and an annular screw member 22 is screwed into the screw portion 21 as a cap.

第１の軸受３および第２の軸受４は、ピニオン軸５のピニオン５ａを挟んだ上下に配置されており、それぞれ、ピニオンハウジング２の収容孔１９の内周に設けられた対応する軸受保持部２５，２６によって支持されている。
第１の軸受３は、例えば転がり軸受としての玉軸受からなり、第２の軸受４は例えば転がり軸受としての円筒ころ軸受からなる。第１の軸受３は、ピニオンハウジング２によって軸方向Ｘ１の下方への移動が規制された外輪２７と、ピニオン軸５とは軸方向Ｘ１に同行移動可能な内輪２８と、外輪２７および内輪２８の間に介在する複数のボールからなる転動体２９を含んでいる。 The first bearing 3 and the second bearing 4 are arranged above and below the pinion 5 a of the pinion shaft 5, and corresponding bearing holding portions provided on the inner periphery of the accommodation hole 19 of the pinion housing 2, respectively. 25, 26.
The first bearing 3 is composed of, for example, a ball bearing as a rolling bearing, and the second bearing 4 is composed of, for example, a cylindrical roller bearing as a rolling bearing. The first bearing 3 includes an outer ring 27 in which the downward movement in the axial direction X1 is restricted by the pinion housing 2, an inner ring 28 that can move along the axial direction X1 with the pinion shaft 5, and the outer ring 27 and the inner ring 28. A rolling element 29 composed of a plurality of balls interposed therebetween is included.

図２を参照して、上記ねじ部材２２は、外輪２７を軸方向Ｘ１に止定するために外輪２７の上端２７ａを押圧する環状の本体３１を備えている。図１を参照して、本体３１の外周３１ａに形成されたねじ部３２が、収容孔１９の入口２０のねじ部２１にねじ込まれている。外輪２７は、収容孔１９の内周に形成された環状段部３３とねじ部材２２の下面の当接部３４との間に挟持されて、ピニオンハウジング２に対する軸方向移動が規制されている。   Referring to FIG. 2, the screw member 22 includes an annular main body 31 that presses the upper end 27a of the outer ring 27 in order to fix the outer ring 27 in the axial direction X1. With reference to FIG. 1, a screw portion 32 formed on the outer periphery 31 a of the main body 31 is screwed into the screw portion 21 of the inlet 20 of the accommodation hole 19. The outer ring 27 is sandwiched between an annular step portion 33 formed on the inner periphery of the accommodation hole 19 and the abutting portion 34 on the lower surface of the screw member 22, so that axial movement relative to the pinion housing 2 is restricted.

本体３１の内周３１ｂには、環状のシール部材３５が保持されており、そのシール部材３５は、本体３１の内周３１ｂとピニオン軸５の外周５ｂとの間を封止する。図１に示すように、シール部材３５は、芯金３５ａと、ピニオン軸５の外周５ｂに係合するリップを有するゴム部材３５ｂとを備えている。
ねじ部材２１の内周３１ｂの内径が大きくなるため、シール部材の外径が大きくできるため、シール部材シール性能を維持しながらピニオン軸の軸方向の長さを短くできるため、より、コンパクトな構造にできる。 An annular seal member 35 is held on the inner periphery 31 b of the main body 31, and the seal member 35 seals between the inner periphery 31 b of the main body 31 and the outer periphery 5 b of the pinion shaft 5. As shown in FIG. 1, the seal member 35 includes a metal core 35 a and a rubber member 35 b having a lip that engages with the outer periphery 5 b of the pinion shaft 5.
Since the inner diameter of the inner periphery 31b of the screw member 21 is increased, the outer diameter of the seal member can be increased. Therefore, the axial length of the pinion shaft can be shortened while maintaining the sealing performance of the seal member. Can be.

また、図１および図２を参照して、ねじ部材２２は、本体３１の内周３１ｂから径方向Ｙ１の内方に突出する規制部３６を備えており、その規制部３６は、第１の軸受３の内輪２８の抜脱を規制する機能も果たす。本体３１の外周３１ｂの上部は、拡径されており、当該ねじ部材２２を回動操作するための工具が係合される工具係合部４０とされている。工具係合部４０は例えば六角形等の多角形断面をなしている。   1 and 2, the screw member 22 includes a restricting portion 36 that protrudes inward in the radial direction Y1 from the inner periphery 31b of the main body 31, and the restricting portion 36 includes It also functions to regulate the removal of the inner ring 28 of the bearing 3. The upper part of the outer periphery 31b of the main body 31 is enlarged in diameter, and is a tool engaging portion 40 with which a tool for rotating the screw member 22 is engaged. The tool engaging portion 40 has a polygonal cross section such as a hexagon.

図２に示すように、規制部３６の最小内径ｄ１（規制部３６の内周３６ａの径に相当）は、内輪２８の外径ｄ２よりも小さくされている（ｄ１＜ｄ２）。これにより、規制部３６によって、ピニオンハウジング２からの内輪２８の抜脱が防止されるようになっている。   As shown in FIG. 2, the minimum inner diameter d1 of the restricting portion 36 (corresponding to the diameter of the inner periphery 36a of the restricting portion 36) is smaller than the outer diameter d2 of the inner ring 28 (d1 <d2). As a result, the restriction portion 36 prevents the inner ring 28 from being removed from the pinion housing 2.

上記シール部材３５は、規制部３６の上面３６ｃに当接しており、規制部３６によって、シール部材３５の軸方向Ｘ１の下方への移動が規制されている。
一方、図１に示すように、内輪２８は、ピニオン軸５の外周に設けられた環状段部３８とピニオン軸５の外周に固定された環状部材３９との間に挟持されて、ピニオン軸５に対する軸方向移動が規制されている。 The seal member 35 is in contact with the upper surface 36c of the restricting portion 36, and the restricting portion 36 restricts the downward movement of the seal member 35 in the axial direction X1.
On the other hand, as shown in FIG. 1, the inner ring 28 is sandwiched between an annular step portion 38 provided on the outer periphery of the pinion shaft 5 and an annular member 39 fixed to the outer periphery of the pinion shaft 5. Axial movement with respect to is restricted.

図１に示す本実施の形態によれば、ピニオンハウジング２の上部の入口２０のねじ部２１にねじ込まれたねじ部材２２が、ピニオン軸５を回転可能にする第１の軸受３の外輪２７の上端２７ａを押圧する環状の本体３１を備えており、その本体３１の内周３１ｂから径方向Ｙ１の内方に突出する規制部３６によって、第１の軸受３の抜脱を確実に防止することができる。   According to the present embodiment shown in FIG. 1, the screw member 22 screwed into the screw portion 21 of the inlet 20 at the top of the pinion housing 2 allows the outer ring 27 of the first bearing 3 to rotate the pinion shaft 5. An annular main body 31 that presses the upper end 27a is provided, and the first bearing 3 is reliably prevented from being pulled out by the restricting portion 36 that protrudes inward in the radial direction Y1 from the inner periphery 31b of the main body 31. Can do.

具体的には、規制部３６の最小内径ｄ１が、内輪２８の外径ｄ２よりも小さくされている（ｄ１＜ｄ２）。したがって、万一、保持器３０の抜脱が発生したとしても、規制部３６によって、内輪２８の抜脱が防止されるので、第１の軸受３およびピニオン軸５がピニオンハウジング２から抜脱することが確実に防止される。さらに軸受のカバーとして、軸受への異物の侵入および、軸受の潤滑グリースの漏れを防止するシールの効果を有し軸受の密封性がよく軸受の耐久性の向上ができる。   Specifically, the minimum inner diameter d1 of the restricting portion 36 is smaller than the outer diameter d2 of the inner ring 28 (d1 <d2). Therefore, even if the retainer 30 is removed, the restriction portion 36 prevents the inner ring 28 from being removed, so that the first bearing 3 and the pinion shaft 5 can be removed from the pinion housing 2. It is surely prevented. Further, as a bearing cover, it has a sealing effect to prevent foreign matters from entering the bearing and leakage of the lubricating grease of the bearing, so that the sealing performance of the bearing is good and the durability of the bearing can be improved.

また、ねじ部材２２の本体３１の内周３１ｂに、本体３１の内周３１ｂとピニオン軸５の外周５ｂとの間を封止するための環状のシール部材３５を保持し、そのシール部材３５の軸方向Ｘ１の下方への移動を上記規制部３６によって規制するようにした。
これにより、ねじ部材２２およびシール部材３５を一体的なユニットとして取り扱うことができ、したがって、組み立て易く、また、修理のときに取外し易くメンテナンスがし易い。
さらに、ピニオン軸や、ハウジングの軸方向長さが短くなるため、軸受に対してピニオン軸の撓みや傾きが少ないため、傾きに強いオイルシール等の特別なシールは必要がなく簡易な構造のシールでよいためシールの小形化が可能となるため、ねじ部材およびシール部材を一体的なユニットとして取り扱うことができ小型化できる。 Further, an annular seal member 35 for sealing between the inner periphery 31 b of the main body 31 and the outer periphery 5 b of the pinion shaft 5 is held on the inner periphery 31 b of the main body 31 of the screw member 22. The downward movement in the axial direction X1 is restricted by the restriction part 36.
As a result, the screw member 22 and the seal member 35 can be handled as an integral unit. Therefore, the screw member 22 and the seal member 35 can be easily assembled, and can be easily removed and maintained during repair.
Furthermore, since the axial length of the pinion shaft and housing is shortened, the pinion shaft is less bent and tilted with respect to the bearing, so there is no need for special seals such as oil seals that are resistant to tilting, and the seal has a simple structure. Therefore, since the seal can be downsized, the screw member and the seal member can be handled as an integral unit, and the size can be reduced.

また、ねじ部材２２の本体３１の外周３１ｂのねじ部３２とピニオンハウジング２の外周との間を封止するために、例えば液体パッキン等のシール部材を用いることが、外部からの水分の浸入を確実に防止するうえで好ましい。   Moreover, in order to seal between the screw part 32 of the outer periphery 31b of the main body 31 of the screw member 22 and the outer periphery of the pinion housing 2, for example, a seal member such as a liquid packing can be used to prevent moisture from entering from the outside. It is preferable for sure prevention.

１…車両用操舵装置、２…ピニオンハウジング（ハウジング）、３…第１の軸受（軸受）、５…ピニオン軸、５ｂ…外周、６…ラック軸、１９…収容孔、２０…入口、２１…ねじ部、２２…ねじ部材、２７…外輪、２７ａ…上端、２８…内輪、２８ａ…上端、２９…転動体、３１…本体、３１ａ…外周、３１ｂ…内周、３２…ねじ部、３３…環状段部、３４…当接部、３５…シール部材、３６…規制部、３９…環状部材、Ｘ１…軸方向、Ｙ１…径方向、ｄ１…第１規制部の内径、ｄ２…内輪の外径、ｄ３…第２規制部の内径、ｄ４…外輪の内径   DESCRIPTION OF SYMBOLS 1 ... Vehicle steering device, 2 ... Pinion housing (housing), 3 ... 1st bearing (bearing), 5 ... Pinion shaft, 5b ... Outer periphery, 6 ... Rack shaft, 19 ... Housing hole, 20 ... Inlet, 21 ... Threaded part, 22 ... Screw member, 27 ... Outer ring, 27a ... Upper end, 28 ... Inner ring, 28a ... Upper end, 29 ... Rolling element, 31 ... Main body, 31a ... Outer circumference, 31b ... Inner circumference, 32 ... Threaded part, 33 ... Annular Step part 34 ... Contact part 35 ... Seal member 36 ... Restriction part 39 ... Ring member X1 ... Axial direction Y1 ... Radial direction d1 ... Inner diameter of first restriction part d2 ... Outer diameter of inner ring, d3: inner diameter of the second restricting portion, d4: inner diameter of the outer ring

Claims (3)

有底筒状のハウジングと、このハウジングの開口部の外周に形成されたねじ部と、前記ハウジング内に設けられたラック軸と、このラック軸と噛み合うピニオンを有するピニオン軸と、前記ハウジングにより保持されピニオン軸を回転可能に支持する軸受と、この軸受は外輪と内輪を備え、前記ハウジングの前記ねじ部に螺着するねじ部材と、このねじ部材により、前記外輪を前記ハウジングと前記ねじ部材により軸方向下方への移動を規制したことを特徴とするラックアンドピニオン式ステアリング装置。   A bottomed cylindrical housing, a threaded portion formed on the outer periphery of the opening of the housing, a rack shaft provided in the housing, a pinion shaft having a pinion that meshes with the rack shaft, and held by the housing A bearing that rotatably supports the pinion shaft, the bearing includes an outer ring and an inner ring, and a screw member that is screwed onto the screw portion of the housing, and the outer ring is formed by the housing and the screw member. A rack-and-pinion steering device characterized in that movement downward in the axial direction is restricted. 請求項１において、前記規制部の最小内径は、前記内輪の外径よりも小さくしたことを特徴とするラックアンドピニオン式ステアリング装置。   2. The rack and pinion type steering apparatus according to claim 1, wherein a minimum inner diameter of the restricting portion is smaller than an outer diameter of the inner ring. 前記ねじ部材の内周に保持され、前記ねじ部材の内周と前記ピニオン軸の外周との間を封止する環状のシール部材を備え、前記規制部によって前記シール部材の軸方向下方への移動を規制したことを特徴とする請求項１に記載のラックアンドピニオン式ステアリング装置。   An annular seal member that is held on the inner periphery of the screw member and seals between the inner periphery of the screw member and the outer periphery of the pinion shaft is provided, and the seal member moves downward in the axial direction by the restricting portion. The rack and pinion type steering device according to claim 1, wherein
JP2011066114A 2011-02-25 2011-03-24 Rack-and-pinion steering device Withdrawn JP2012188100A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160015009A (en) * 2014-07-30 2016-02-12 현대모비스 주식회사 Rack-pinion type steering device
KR20160049279A (en) * 2014-10-27 2016-05-09 현대모비스 주식회사 Steering device for vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160015009A (en) * 2014-07-30 2016-02-12 현대모비스 주식회사 Rack-pinion type steering device
KR102138498B1 (en) 2014-07-30 2020-07-28 현대모비스 주식회사 Rack-pinion type steering device
KR20160049279A (en) * 2014-10-27 2016-05-09 현대모비스 주식회사 Steering device for vehicle
KR102189711B1 (en) 2014-10-27 2020-12-11 현대모비스 주식회사 Steering device for vehicle

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