JP2008238979A - Gear housing structure for electric power steering device - Google Patents

Gear housing structure for electric power steering device Download PDF

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JP2008238979A
JP2008238979A JP2007082942A JP2007082942A JP2008238979A JP 2008238979 A JP2008238979 A JP 2008238979A JP 2007082942 A JP2007082942 A JP 2007082942A JP 2007082942 A JP2007082942 A JP 2007082942A JP 2008238979 A JP2008238979 A JP 2008238979A
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pinion
rack
shaft
pinion shaft
electric power
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JP4994079B2 (en
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Tsutomu Kimijima
力 君島
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Showa Corp
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Showa Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance bending rigidity in the longitudinal direction of a pinion storage part, and to perform consistent steering assistance even when the reaction force of a road surface is present in a gear housing structure for an electric power steering device. <P>SOLUTION: In the gear housing structure for the electric power steering device 10, a longitudinal reinforcing rib 31 along the longitudinal direction of a pinion shaft 14 is provided on an outer surface located opposite to a rack guide 17 across a mesh area of a pinion 14A of the pinion shaft 14 at a pinion storage part 11A with a rack 16A of a rack shaft 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は電動パワーステアリング装置のギヤハウジング構造に関する。   The present invention relates to a gear housing structure of an electric power steering apparatus.

電動パワーステアリング装置のギヤハウジング構造として、特許文献１に記載の如く、ステアリングホイールに連結されるピニオン軸を収納するピニオン収納部と、ピニオン軸のピニオンに噛合うラックを有するラック軸を収納するラック収納部と、ラック軸のラックをピニオン軸のピニオンに押し付けるラックガイドを収納するガイド収納部とを有し、電動モータの補助トルクを歯車列によりピニオン軸に伝達する電動パワーステアリング装置のギヤハウジング構造において、ラック収納部の外面にラック軸の長手方向に沿う横長の補強リブを設けるとともに、ラック収納部の外面にピニオン軸の中心線と平行をなす縦長の補強リブを設けたものがある。横長の補強リブはラック収納部の長手方向の曲げ剛性を高め、縦長の補強リブはラック収納部のねじり剛性を高める。
特開2003-226248 As a gear housing structure of an electric power steering apparatus, as described in Patent Document 1, a rack that stores a rack shaft having a pinion storage portion that stores a pinion shaft connected to a steering wheel and a rack that meshes with the pinion of the pinion shaft A gear housing structure of an electric power steering apparatus having a storage portion and a guide storage portion for storing a rack guide for pressing the rack of the rack shaft against the pinion of the pinion shaft, and transmitting the auxiliary torque of the electric motor to the pinion shaft by a gear train In this case, there are provided laterally long reinforcing ribs along the longitudinal direction of the rack shaft on the outer surface of the rack storage portion, and vertical longitudinal reinforcing ribs parallel to the center line of the pinion shaft on the outer surface of the rack storage portion. The horizontally long reinforcing ribs increase the bending rigidity in the longitudinal direction of the rack housing portion, and the vertically long reinforcing ribs increase the torsional rigidity of the rack housing portion.
JP2003-226248

特許文献１に記載の電動パワーステアリング装置のギヤハウジング構造では、ピニオン収納部の長手方向の曲げ剛性を高めるところがない。このため、車輪に作用する路面反力に基づき、ラック軸によりピニオン軸が押されると、低剛性のピニオン収納部に支持されているピニオン軸が図２に２点斜線で示す如くに大きく撓む。これにより、電動モータの側のウォームギヤと、ピニオン軸に固定されているウォームホイールとの噛合いが不安定になり、円滑な操舵アシストが行なわれなくなる。   In the gear housing structure of the electric power steering apparatus described in Patent Document 1, there is no place to increase the bending rigidity in the longitudinal direction of the pinion housing portion. For this reason, when the pinion shaft is pushed by the rack shaft based on the road surface reaction force acting on the wheel, the pinion shaft supported by the low-rigidity pinion storage portion is greatly bent as shown by the two-dot oblique lines in FIG. . As a result, the meshing between the worm gear on the electric motor side and the worm wheel fixed to the pinion shaft becomes unstable, and smooth steering assist is not performed.

本発明の課題は、電動パワーステアリング装置のギヤハウジング構造において、ピニオン収納部の長手方向の曲げ剛性を向上し、路面反力があっても安定した操舵アシストを行なうことにある。   An object of the present invention is to improve the bending rigidity in the longitudinal direction of a pinion housing portion in a gear housing structure of an electric power steering apparatus, and to perform stable steering assist even when there is a road surface reaction force.

請求項１の発明は、ステアリングホイールに連結されるピニオン軸を収納するピニオン収納部と、ピニオン軸のピニオンに噛合うラックを有するラック軸を収納するラック収納部と、ラック軸のラックをピニオン軸のピニオンに押し付けるラックガイドを収納するガイド収納部とを有し、電動モータの補助トルクを歯車列によりピニオン軸に伝達する電動パワーステアリング装置のギヤハウジング構造において、ピニオン収納部におけるピニオン軸のピニオンとラック軸のラックの噛合い部を挟んで、ラックガイドと反対側に位置する外面に、ピニオン軸の長手方向に沿う縦方向補強リブを設けたものである。   According to a first aspect of the present invention, there is provided a pinion storage portion for storing a pinion shaft connected to a steering wheel, a rack storage portion for storing a rack shaft having a rack that meshes with the pinion of the pinion shaft, and a rack of the rack shaft as a pinion shaft. A gear housing structure of an electric power steering device that transmits auxiliary torque of the electric motor to the pinion shaft by a gear train, and a pinion of the pinion shaft in the pinion housing portion. A longitudinal reinforcing rib along the longitudinal direction of the pinion shaft is provided on the outer surface located on the opposite side of the rack guide across the meshing portion of the rack of the rack shaft.

請求項２の発明は、請求項１の発明において更に、前記縦方向補強リブを、ピニオン収納部におけるピニオン軸のための上部軸受と下部軸受の間に設けたものである。   According to a second aspect of the present invention, in the first aspect of the present invention, the longitudinal reinforcing rib is provided between an upper bearing and a lower bearing for the pinion shaft in the pinion housing portion.

請求項３の発明は、請求項１又は２の発明において更に、前記ピニオン収納部におけるピニオン軸のための下部軸受を備える部分の外面に、ピニオン軸の長手方向に直交する横方向補強リブを設けたものである。   According to a third aspect of the present invention, in the first or second aspect of the present invention, a lateral reinforcing rib perpendicular to the longitudinal direction of the pinion shaft is provided on the outer surface of the portion having the lower bearing for the pinion shaft in the pinion housing portion. It is a thing.

（請求項１）
(a)電動パワーステアリング装置のギヤハウジング構造において、ピニオン収納部におけるピニオン軸のピニオンとラック軸のラックの噛合い部を挟んで、ラックガイドと反対側に位置する外面に、ピニオン軸の長手方向に沿う縦方向補強リブを設けたから、ピニオン収納部の長手方向の曲げ剛性が高められる。このため、車輪に作用する路面反力に基づき、ラック軸によりピニオン軸が押されても、高剛性のピニオン収納部に支持されているピニオン軸は大きく撓むことがない。これにより、電動モータの側のウォームギヤと、ピニオン軸に固定されているウォームホイールの噛合いを安定にし、路面反力があっても安定した操舵アシストを行なうことができる。 (Claim 1)
(a) In the gear housing structure of the electric power steering device, the longitudinal direction of the pinion shaft on the outer surface located on the opposite side of the rack guide across the meshing portion of the pinion shaft of the pinion housing and the rack of the rack shaft Since the longitudinal reinforcing ribs along the vertical axis are provided, the bending rigidity in the longitudinal direction of the pinion housing portion is enhanced. For this reason, even if the pinion shaft is pushed by the rack shaft based on the road surface reaction force acting on the wheels, the pinion shaft supported by the highly rigid pinion housing portion does not bend greatly. As a result, the meshing between the worm gear on the electric motor side and the worm wheel fixed to the pinion shaft is stabilized, and stable steering assist can be performed even when there is a road surface reaction force.

（請求項２）
(b)縦方向補強リブが、ピニオン収納部におけるピニオン軸のための上部軸受と下部軸受の間に設けられるものにしたから、高剛性のピニオン収納部にピニオン軸のための上部軸受と下部軸受を強固に支持し、ピニオン軸が撓むことを確実に回避できる。 (Claim 2)
(b) Since the longitudinal reinforcing rib is provided between the upper bearing and the lower bearing for the pinion shaft in the pinion housing portion, the upper bearing and the lower bearing for the pinion shaft are provided in the high-rigidity pinion housing portion. Is firmly supported, and the pinion shaft can be reliably prevented from being bent.

（請求項３）
(c)ピニオン収納部におけるピニオン軸のための下部軸受を備える部分の外面に、ピニオン軸の長手方向に直交する横方向補強リブを設けたから、ピニオン軸のための下部軸受を備える部分の剛性を高めてこの下部軸受を強固に支持し、ピニオン軸が撓むことを確実に回避できる。 (Claim 3)
(c) Since the lateral reinforcement ribs orthogonal to the longitudinal direction of the pinion shaft are provided on the outer surface of the portion having the lower bearing for the pinion shaft in the pinion housing portion, the rigidity of the portion having the lower bearing for the pinion shaft is increased. The lower bearing can be firmly supported by being raised, and the pinion shaft can be reliably prevented from being bent.

図１は電動パワーステアリング装置を示す側面図、図２は図１のII−II線に沿う模式断面図、図３はギヤハウジングの要部を示し、（Ａ）は側面図、（Ｂ）はＢ矢視図、（Ｃ）はＣ−Ｃ線に沿う断面図、図４は図３のIV−IV線に沿う断面図である。   1 is a side view showing an electric power steering apparatus, FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. 1, FIG. 3 shows a main part of a gear housing, (A) is a side view, and (B) is a side view. B arrow figure, (C) is sectional drawing which follows CC line, FIG. 4 is sectional drawing which follows the IV-IV line of FIG.

電動パワーステアリング装置１０は、図１、図２に示す如く、不図示のブラケットにより車体フレーム等に固定されるアルミ合金製のギヤハウジング１１を有する。そして、ステアリングホイールに結合されるステアリング軸１２にトーションバー１３を介してピニオン軸１４を連結し、このピニオン軸１４をギヤハウジング１１のピニオン収納部１１Ａに収納する。ピニオン収納部１１Ａは、ピニオン軸１４を支持するための上部軸受１５Ａと下部軸受１５Ｂを該ピニオン収納部１１Ａに嵌合して備える。１５Ｃはエンドキャップである。   As shown in FIGS. 1 and 2, the electric power steering apparatus 10 includes an aluminum alloy gear housing 11 fixed to a vehicle body frame or the like by a bracket (not shown). Then, the pinion shaft 14 is connected to the steering shaft 12 coupled to the steering wheel via the torsion bar 13, and the pinion shaft 14 is stored in the pinion storage portion 11 </ b> A of the gear housing 11. The pinion storage portion 11A includes an upper bearing 15A and a lower bearing 15B for supporting the pinion shaft 14 fitted into the pinion storage portion 11A. 15C is an end cap.

電動パワーステアリング装置１０は、ピニオン軸１４のピニオン１４Ａに噛合うラック１６Ａを有するラック軸１６をギヤハウジング１１のラック収納部１１Ｂに収納する。   The electric power steering apparatus 10 stores a rack shaft 16 having a rack 16 </ b> A that meshes with the pinion 14 </ b> A of the pinion shaft 14 in a rack storage portion 11 </ b> B of the gear housing 11.

電動パワーステアリング装置１０は、ラック軸１６においてラック１６Ａがピニオン軸１４のピニオン１４Ａと噛合いする部位の背面側に、ラック軸１６のラック１６Ａをピニオン軸１４のピニオン１４Ａに押し付けるラックガイド１７を設ける。ラックガイド１７は、ギヤハウジング１１のガイド収納部１１Ｃに収納され、ガイド収納部１１Ｃに螺着されるキャップ１７Ａにより背面支持されるばね１７Ｂによってラック軸１６の側に弾発され、ラック軸１６のラック１６Ａをピニオン軸１４のピニオン１４Ａに押し付けるとともに、ラック軸１６の一端を摺動自在に支持する。尚、ラック軸１６の他端は不図示の軸受によりラック収納部１１Ｂに支持される。また、ラック軸１６の両端部はラック収納部１１Ｂの左右に突出し、この突出端に左右のタイロッド１８Ａ、１８Ｂを介して左右の操舵車輪が連結される。   The electric power steering device 10 is provided with a rack guide 17 that presses the rack 16A of the rack shaft 16 against the pinion 14A of the pinion shaft 14 on the back side of the portion of the rack shaft 16 where the rack 16A meshes with the pinion 14A of the pinion shaft 14. . The rack guide 17 is housed in the guide housing portion 11C of the gear housing 11 and is repelled toward the rack shaft 16 by a spring 17B supported on the back by a cap 17A screwed to the guide housing portion 11C. The rack 16A is pressed against the pinion 14A of the pinion shaft 14, and one end of the rack shaft 16 is slidably supported. The other end of the rack shaft 16 is supported by the rack storage portion 11B by a bearing (not shown). Further, both end portions of the rack shaft 16 protrude to the left and right of the rack storage portion 11B, and left and right steering wheels are connected to the protruding ends via left and right tie rods 18A and 18B.

電動パワーステアリング装置１０は、ギヤハウジング１１に電動モータ２０を固定し、電動モータ２０の出力軸に連結したウォームギヤ２１を、ピニオン軸１４に固定してあるウォームホイール２２に噛合いさせている。電動パワーステアリング装置１０において、ステアリングホイールに加えた操舵トルクがステアリング軸１２とピニオン軸１４の間のトーションバー１３を弾性ねじり変形させ、不図示の操舵トルク検出装置がその操舵トルクを検出したとき、電動モータ２０はこの操舵トルクに見合う補助トルクを発生する。そして、電動モータ２０の補助トルクがウォームギヤ２１とウォームホイール２２の歯車列によりピニオン軸１４に伝達され、ひいてはラック軸１６に操舵アシスト力として付与される。   In the electric power steering apparatus 10, an electric motor 20 is fixed to a gear housing 11, and a worm gear 21 connected to an output shaft of the electric motor 20 is engaged with a worm wheel 22 fixed to a pinion shaft 14. In the electric power steering device 10, when the steering torque applied to the steering wheel causes the torsion bar 13 between the steering shaft 12 and the pinion shaft 14 to be elastically torsionally deformed, and a steering torque detector (not shown) detects the steering torque, The electric motor 20 generates auxiliary torque commensurate with this steering torque. Then, the auxiliary torque of the electric motor 20 is transmitted to the pinion shaft 14 by the gear train of the worm gear 21 and the worm wheel 22, and thus is applied to the rack shaft 16 as a steering assist force.

しかるに、電動パワーステアリング装置１０にあっては、ギヤハウジング１１におけるピニオン収納部１１Ａのピニオン軸１４に沿う長手方向（軸方向）の曲げ剛性を向上するため、図２〜図４に示す如く、ピニオン収納部１１Ａにおけるピニオン軸１４のピニオン１４Ａとラック軸１６のラック１６Ａの噛合い部を挟んで、ラックガイド１７と反対側に位置する外面に、ピニオン軸１４の長手方向に沿う縦方向補強リブ３１を設けた。縦方向補強リブ３１は、ピニオン収納部１１Ａにおけるピニオン軸１４のための上部軸受１５Ａと下部軸受１５Ｂの間に設けられる。   However, in the electric power steering apparatus 10, in order to improve the bending rigidity in the longitudinal direction (axial direction) along the pinion shaft 14 of the pinion housing portion 11A in the gear housing 11, as shown in FIGS. A longitudinal reinforcing rib 31 along the longitudinal direction of the pinion shaft 14 is formed on the outer surface of the storage portion 11A on the opposite side of the rack guide 17 with the meshing portion of the pinion 14A of the pinion shaft 14 and the rack 16A of the rack shaft 16 interposed therebetween. Was established. The longitudinal reinforcing rib 31 is provided between the upper bearing 15A and the lower bearing 15B for the pinion shaft 14 in the pinion housing portion 11A.

本実施例では、ピニオン収納部１１Ａにおけるピニオン軸１４の中心軸に直交する横断面において、ピニオン軸１４の中心軸の周囲で、ラックガイド１７と反対側に位置する概ね半周範囲に、複数本（例えば４本）の互いに平行をなす板状の補強リブ３１を設けた。   In the present embodiment, in a cross section perpendicular to the central axis of the pinion shaft 14 in the pinion storage portion 11A, a plurality of (in a substantially half-circumferential range around the central axis of the pinion shaft 14 and opposite to the rack guide 17 ( For example, four plate-shaped reinforcing ribs 31 that are parallel to each other are provided.

更に、電動パワーステアリング装置１０にあっては、ピニオン収納部１１Ａにおけるピニオン軸１４のための下部軸受１５Ｂを備える部分の外面に、ピニオン軸１４の長手方向に直交する横方向補強リブ３２を設けた。横方向補強リブ３２は、ピニオン収納部１１Ａにおけるピニオン軸１４の中心軸に直交する横断面において、ピニオン軸１４の中心軸の周囲の概ね全周に渡って設けられる板状をなす。   Further, in the electric power steering apparatus 10, a lateral reinforcing rib 32 orthogonal to the longitudinal direction of the pinion shaft 14 is provided on the outer surface of the portion including the lower bearing 15B for the pinion shaft 14 in the pinion housing portion 11A. . The lateral reinforcing rib 32 has a plate shape provided over substantially the entire circumference around the central axis of the pinion shaft 14 in a cross section orthogonal to the central axis of the pinion shaft 14 in the pinion housing portion 11A.

本実施例によれば以下の作用効果を奏する。
(a)電動パワーステアリング装置１０のギヤハウジング構造において、ピニオン収納部１１Ａにおけるピニオン軸１４のピニオン１４Ａとラック軸１６のラック１６Ａの噛合い部を挟んで、ラックガイド１７と反対側に位置する外面に、ピニオン軸１４の長手方向に沿う縦方向補強リブ３１を設けたから、ピニオン収納部１１Ａの長手方向の曲げ剛性が高められる。このため、車輪に作用する路面反力に基づき、ラック軸１６によりピニオン軸１４が押されても、高剛性のピニオン収納部１１Ａに支持されているピニオン軸１４は大きく撓むことがない。これにより、電動モータ２０の側のウォームギヤ２１と、ピニオン軸１４に固定されているウォームホイール２２の噛合いを安定にし、路面反力があっても安定した操舵アシストを行なうことができる。 According to the present embodiment, the following operational effects can be obtained.
(a) In the gear housing structure of the electric power steering apparatus 10, an outer surface located on the opposite side of the rack guide 17 across the meshing portion of the pinion 14A of the pinion shaft 14 and the rack 16A of the rack shaft 16 in the pinion housing portion 11A. In addition, since the longitudinal reinforcing ribs 31 along the longitudinal direction of the pinion shaft 14 are provided, the bending rigidity in the longitudinal direction of the pinion housing portion 11A is enhanced. For this reason, even if the pinion shaft 14 is pushed by the rack shaft 16 based on the road surface reaction force acting on the wheels, the pinion shaft 14 supported by the highly rigid pinion housing portion 11A does not bend greatly. Thereby, the meshing between the worm gear 21 on the electric motor 20 side and the worm wheel 22 fixed to the pinion shaft 14 can be stabilized, and stable steering assist can be performed even if there is a road surface reaction force.

(b)縦方向補強リブ３１が、ピニオン収納部１１Ａにおけるピニオン軸１４のための上部軸受１５Ａと下部軸受１５Ｂの間に設けられるものにしたから、高剛性のピニオン収納部１１Ａにピニオン軸１４のための上部軸受１５Ａと下部軸受１５Ｂを強固に支持し、ピニオン軸１４が撓むことを確実に回避できる。   (b) Since the longitudinal reinforcing rib 31 is provided between the upper bearing 15A and the lower bearing 15B for the pinion shaft 14 in the pinion storage portion 11A, the pinion shaft 14 is provided in the highly rigid pinion storage portion 11A. Therefore, it is possible to securely support the upper bearing 15A and the lower bearing 15B for preventing the pinion shaft 14 from being bent.

(c)ピニオン収納部１１Ａにおけるピニオン軸１４のための下部軸受１５Ｂを備える部分の外面に、ピニオン軸１４の長手方向に直交する横方向補強リブ３２を設けたから、ピニオン軸１４のための下部軸受１５Ｂを備える部分の剛性を高めてこの下部軸受１５Ｂを強固に支持し、ピニオン軸１４が撓むことを確実に回避できる。   (c) Since the lateral reinforcing rib 32 perpendicular to the longitudinal direction of the pinion shaft 14 is provided on the outer surface of the portion including the lower bearing 15B for the pinion shaft 14 in the pinion housing portion 11A, the lower bearing for the pinion shaft 14 is provided. The lower bearing 15B is firmly supported by increasing the rigidity of the portion provided with 15B, and the pinion shaft 14 can be reliably prevented from being bent.

以上、本発明の実施例を図面により詳述したが、本発明の具体的な構成はこの実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。   Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

図１は電動パワーステアリング装置を示す側面図である。FIG. 1 is a side view showing an electric power steering apparatus. 図２は図１のII−II線に沿う模式断面図である。FIG. 2 is a schematic sectional view taken along line II-II in FIG. 図３はギヤハウジングの要部を示し、（Ａ）は側面図、（Ｂ）はＢ矢視図、（Ｃ）はＣ−Ｃ線に沿う断面図である。FIGS. 3A and 3B show a main part of the gear housing, in which FIG. 3A is a side view, FIG. 3B is a view taken in the direction of arrow B, and FIG. 図４は図３のIV−IV線に沿う断面図である。4 is a cross-sectional view taken along line IV-IV in FIG.

符号の説明Explanation of symbols

１０ 電動パワーステアリング装置
１１ ギヤハウジング
１１Ａ ピニオン収納部
１１Ｃ ガイド収納部
１４ ピニオン軸
１４Ａ ピニオン
１５Ａ 上部軸受
１５Ｂ 下部軸受
１６ ラック軸
１６Ａ ラック
１７ ラックガイド
２０ 電動モータ
２１ ウォームギヤ
２２ ウォームホイール
３１ 縦方向補強リブ
３２ 横方向補強リブ DESCRIPTION OF SYMBOLS 10 Electric power steering apparatus 11 Gear housing 11A Pinion accommodating part 11C Guide accommodating part 14 Pinion shaft 14A Pinion 15A Upper bearing 15B Lower bearing 16 Rack shaft 16A Rack 17 Rack guide 20 Electric motor 21 Worm gear 22 Worm wheel 31 Vertical direction reinforcement rib 32 Horizontal Directional reinforcement rib

Claims (3)

ステアリングホイールに連結されるピニオン軸を収納するピニオン収納部と、
ピニオン軸のピニオンに噛合うラックを有するラック軸を収納するラック収納部と、
ラック軸のラックをピニオン軸のピニオンに押し付けるラックガイドを収納するガイド収納部とを有し、
電動モータの補助トルクを歯車列によりピニオン軸に伝達する電動パワーステアリング装置のギヤハウジング構造において、
ピニオン収納部におけるピニオン軸のピニオンとラック軸のラックの噛合い部を挟んで、ラックガイドと反対側に位置する外面に、ピニオン軸の長手方向に沿う縦方向補強リブを設けたことを特徴とする電動パワーステアリング装置のギヤハウジング構造。 A pinion storage portion for storing a pinion shaft connected to the steering wheel;
A rack storage portion for storing a rack shaft having a rack that meshes with the pinion of the pinion shaft;
A guide storage unit that stores a rack guide that presses the rack of the rack shaft against the pinion of the pinion shaft;
In the gear housing structure of the electric power steering device that transmits the auxiliary torque of the electric motor to the pinion shaft by a gear train,
A longitudinal reinforcing rib along the longitudinal direction of the pinion shaft is provided on the outer surface located on the opposite side of the rack guide across the meshing portion of the pinion shaft and the rack shaft rack in the pinion storage portion. Gear housing structure for electric power steering device. 前記縦方向補強リブを、ピニオン収納部におけるピニオン軸のための上部軸受と下部軸受の間に設けた請求項１に記載の電動パワーステアリング装置のギヤハウジング構造。   The gear housing structure of the electric power steering apparatus according to claim 1, wherein the longitudinal reinforcing rib is provided between an upper bearing and a lower bearing for the pinion shaft in the pinion housing portion. 前記ピニオン収納部におけるピニオン軸のための下部軸受を備える部分の外面に、ピニオン軸の長手方向に直交する横方向補強リブを設けた請求項１又は２に記載の電動パワーステアリング装置のギヤハウジング構造。   The gear housing structure of the electric power steering apparatus according to claim 1 or 2, wherein a lateral reinforcing rib perpendicular to the longitudinal direction of the pinion shaft is provided on an outer surface of a portion including a lower bearing for the pinion shaft in the pinion housing portion. .
JP2007082942A 2007-03-27 2007-03-27 Gear housing structure of electric power steering device Expired - Fee Related JP4994079B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014189108A (en) * 2013-03-26 2014-10-06 Showa Corp Steering device and housing structure
KR20200047035A (en) * 2018-10-26 2020-05-07 현대모비스 주식회사 Steering device for vehicle
JP6900589B1 (en) * 2021-03-25 2021-07-07 日立Astemo株式会社 Steering device

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Publication number Priority date Publication date Assignee Title
JPH11115786A (en) * 1997-10-17 1999-04-27 Koyo Seiko Co Ltd Housing connecting construction for power steering device
JP2003072562A (en) * 2001-08-30 2003-03-12 Koyo Seiko Co Ltd Electric power steering device
JP2003226248A (en) * 2002-02-04 2003-08-12 Honda Motor Co Ltd Housing structure for electric power steering device
JP2007050800A (en) * 2005-08-19 2007-03-01 Nsk Ltd Steering device
JP2008149843A (en) * 2006-12-15 2008-07-03 Nsk Ltd Electric power steering device

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Publication number Priority date Publication date Assignee Title
JPH11115786A (en) * 1997-10-17 1999-04-27 Koyo Seiko Co Ltd Housing connecting construction for power steering device
JP2003072562A (en) * 2001-08-30 2003-03-12 Koyo Seiko Co Ltd Electric power steering device
JP2003226248A (en) * 2002-02-04 2003-08-12 Honda Motor Co Ltd Housing structure for electric power steering device
JP2007050800A (en) * 2005-08-19 2007-03-01 Nsk Ltd Steering device
JP2008149843A (en) * 2006-12-15 2008-07-03 Nsk Ltd Electric power steering device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014189108A (en) * 2013-03-26 2014-10-06 Showa Corp Steering device and housing structure
KR20200047035A (en) * 2018-10-26 2020-05-07 현대모비스 주식회사 Steering device for vehicle
KR102427344B1 (en) 2018-10-26 2022-07-29 현대모비스 주식회사 Steering device for vehicle
JP6900589B1 (en) * 2021-03-25 2021-07-07 日立Astemo株式会社 Steering device
WO2022201407A1 (en) * 2021-03-25 2022-09-29 日立Astemo株式会社 Steering device
DE112021007385T5 (en) 2021-03-25 2024-02-22 Hitachi Astemo, Ltd. Steering device

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