JP2019014343A - Steering device for vehicle - Google Patents

Steering device for vehicle Download PDF

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Publication number
JP2019014343A
JP2019014343A JP2017132066A JP2017132066A JP2019014343A JP 2019014343 A JP2019014343 A JP 2019014343A JP 2017132066 A JP2017132066 A JP 2017132066A JP 2017132066 A JP2017132066 A JP 2017132066A JP 2019014343 A JP2019014343 A JP 2019014343A
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joint
shaft
coupling
worm
output shaft
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慶憲 石橋
Yoshinori Ishibashi
慶憲 石橋
伸哉 榊原
Shinya Sakakibara
伸哉 榊原
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Aisin Corp
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Aisin Seiki Co Ltd
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Abstract

To provide a steering device for a vehicle, provided for an electric telescopic mechanism or an electric tilt mechanism and including a shaft coupling by means of which a worm shaft can be aligned appropriately with a simple and inexpensive configuration.SOLUTION: A shaft coupling (3) is interposed between an electric motor (1) and a reduction mechanism (2), and the shaft coupling comprises a first coupling (30) and a second coupling (40). The first coupling has, at one end part, a plurality of engagement projections (33) extending in an axial direction and disposed at equal intervals in a circumferential direction, and the other end part (cylindrical part 31) is coupled to an output shaft (10) of the electric motor. A second coupling has, at one end part, a plurality of engagement recessed parts (43) extending in an axial direction, disposed at equal intervals in a circumferential direction, and capable of being engaged with the plurality of engagement projections. The other end part (cylindrical part 41) is coupled to a worm shaft (20) of the reduction mechanism and a wave washer (50) is interposed between the first coupling and the second coupling.SELECTED DRAWING: Figure 1

Description

本発明は、車両のステアリング装置に関し、特に、電動テレスコピック機構及び電動チルト機構の少なくとも一方の機構を備えたステアリング装置に係る。   The present invention relates to a steering apparatus for a vehicle, and particularly relates to a steering apparatus including at least one of an electric telescopic mechanism and an electric tilt mechanism.

近時の車両のステアリング装置には、ステアリングホイールの操作位置を調整し得る電動テレスコピック機構や電動チルト機構が装着されており、例えば下記の特許文献１の図１に開示されている。電動テレスコピック機構及び電動チルト機構の何れも、電動モータと、その出力軸に連結されウォーム軸を中心に回転するウォームギヤ、及びこれに噛合するホイールギヤを有する減速機構を備えている。   A recent vehicle steering apparatus is equipped with an electric telescopic mechanism and an electric tilt mechanism that can adjust the operation position of the steering wheel, and is disclosed in, for example, FIG. Each of the electric telescopic mechanism and the electric tilt mechanism includes an electric motor, a worm gear connected to the output shaft thereof and rotating around the worm shaft, and a speed reduction mechanism having a wheel gear meshing with the worm gear.

そして、例えば下記の特許文献２には、「安価な構成でウォーム軸の調芯と軸方向調整を同時且つ適切に行い得るウォーム軸調芯機構を提供すること」を目的とし、「ハウジングに電動モータの本体を支持すると共に、当該電動モータの出力軸に連結するウォーム軸を、支持部材を介して前記ハウジングに支持する電動モータのウォーム軸調芯機構において、前記ウォーム軸及び前記支持部材の一方側の先端面に凹部を形成すると共に、前記ウォーム軸及び前記支持部材の他方側に、前記凹部の内面に当接する突起部を形成し、該突起部を前記凹部に当接した状態で、前記支持部材を前記ハウジングに固定して、前記ウォーム軸の先端部を回転可能に支持すると共に軸方向移動を規制するように構成する」ことが提案されている（特許文献２の段落〔０００５〕及び〔０００６〕に記載）。   For example, Japanese Patent Application Laid-Open Publication No. 2004-228561 has an object of “providing a worm shaft alignment mechanism capable of simultaneously and appropriately performing alignment and axial adjustment of a worm shaft with an inexpensive configuration”. In the worm shaft alignment mechanism of the electric motor that supports the motor body and supports the worm shaft connected to the output shaft of the electric motor to the housing via the support member, one of the worm shaft and the support member A concave portion is formed on the front end surface of the side, and a projection that contacts the inner surface of the recess is formed on the other side of the worm shaft and the support member, and the projection is in contact with the recess, It is proposed that the support member is fixed to the housing, and the tip portion of the worm shaft is rotatably supported and the axial movement is restricted ”(Patent Document 2). Described in paragraphs [0005] and [0006]).

また、下記の特許文献３には、「従動軸の汎用性を高めることができるモータを提供すること」を目的とし、「回転駆動される駆動軸を有するモータ本体と、前記駆動軸と同軸上に配置され前記駆動軸の回転駆動力により回転される従動軸を有し前記駆動軸の回転を減速して出力する減速機構と、前記駆動軸と前記従動軸との間に配置され前記駆動軸の先端部と前記従動軸の基端部とを連結し前記駆動軸の回転駆動力を前記従動軸に伝達するカップリング装置とを備え、前記カップリング装置は、前記駆動軸及び前記従動軸の何れか一方に軸方向から当接してスラスト荷重を受けるボールと、前記駆動軸及び前記従動軸の何れか他方と前記ボールとの間に介在されるとともに前記駆動軸及び前記従動軸の何れか他方に軸方向から当接しスラスト荷重を受ける中間スラスト部材と、前記中間スラスト部材を保持するとともに前記従動軸の基端部に一体回転可能に連結され前記駆動軸と前記従動軸との間の回転の伝達を行う回転伝達部材とを有する」モータが提案されている（特許文献３の段落〔０００５〕及び〔０００６〕に記載）。   Further, the following Patent Document 3 aims to “provide a motor capable of enhancing the versatility of a driven shaft”, and “a motor body having a drive shaft that is rotationally driven, and coaxial with the drive shaft. A reduction mechanism that has a driven shaft that is rotated by the rotational driving force of the drive shaft and that outputs the drive shaft by decelerating the rotation, and the drive shaft that is disposed between the drive shaft and the driven shaft A coupling device that connects a distal end portion of the driven shaft and a proximal end portion of the driven shaft and transmits a rotational driving force of the drive shaft to the driven shaft, and the coupling device includes the drive shaft and the driven shaft. One of the drive shaft and the driven shaft, which is interposed between the ball that is in contact with any one from the axial direction and receives a thrust load and the other of the drive shaft and the driven shaft and the ball Thrust against the axial direction An intermediate thrust member that receives a load; and a rotation transmission member that holds the intermediate thrust member and is connected to a proximal end portion of the driven shaft so as to be integrally rotatable, and transmits rotation between the drive shaft and the driven shaft. Have been proposed (described in paragraphs [0005] and [0006] of Patent Document 3).

特許第５７８２９５６号公報Japanese Patent No. 5782956 特開２０１２−１０１６６８号公報JP 2012-101668 A 特開２０１４−１３５８６９号公報JP 2014-135869 A

上記特許文献２に記載の「ウォーム軸調芯機構」は「ウォーム軸の先端部」に設けられており、その段落〔００１５〕には「電動モータの出力軸とウォーム軸とはカップリングを介して連結されている」（引用符合は省略）と記載されているが、出力軸との連結部の構造については詳細な記載はない。一方、上記特許文献３は「従動軸の汎用性を高めること」を目的とするものであり、同文献に記載のカップリング装置について、その段落〔０００７〕に「回転伝達部材は、中間スラスト部材が駆動軸及び従動軸の何れか他方に軸方向から当接することによって、駆動軸及び従動軸に対する軸方向の位置決めがなされる」と記載されており、また、その段落〔００４８〕には「中間スラスト部材は、回転軸に軸方向から当接したボールにも軸方向から当接しているため、これにより、回転軸に対する回転伝達部材の軸方向の位置決めがなされる」（引用符合は省略）と記載されているが、調芯機構としての構成は定かではない。しかも、特許文献３に記載のカップリング装置は部品点数が多く、組み付けも困難であるので、仮に同装置を、前述の電動テレスコピック機構や電動チルト機構に供される電動モータの出力軸と減速機構のウォーム軸の軸継手として用いればコストアップ要因となる。   The “worm shaft alignment mechanism” described in Patent Document 2 is provided at the “tip portion of the worm shaft”, and its paragraph [0015] states that “the output shaft of the electric motor and the worm shaft are coupled via a coupling. Are connected "(quotation marks are omitted), but there is no detailed description of the structure of the connecting portion with the output shaft. On the other hand, the above-mentioned Patent Document 3 is intended to “enhance the versatility of the driven shaft”, and in the paragraph [0007], the “rotation transmitting member is an intermediate thrust member”. Is positioned in the axial direction with respect to either the drive shaft or the driven shaft from the axial direction, and is described in the paragraph [0048]. The thrust member is also in contact with the ball, which is in contact with the rotating shaft from the axial direction, from the axial direction, thereby positioning the rotational transmission member with respect to the rotating shaft in the axial direction ”(quotes omitted). Although described, the configuration as the alignment mechanism is not clear. In addition, since the coupling device described in Patent Document 3 has a large number of parts and is difficult to assemble, the device is temporarily used as an output shaft and a speed reduction mechanism of an electric motor used for the electric telescopic mechanism and the electric tilt mechanism. If it is used as a shaft joint of a worm shaft, it will increase the cost.

そこで、本発明は、電動テレスコピック機構及び電動チルト機構の少なくとも一方の機構に供され、電動モータの出力軸と減速機構のウォーム軸を連結する軸継手であって、簡単且つ安価な構成で適切にウォーム軸の調芯を行い得る軸継手を備えたステアリング装置を提供することを課題とする。   Therefore, the present invention is a shaft coupling that is used in at least one of an electric telescopic mechanism and an electric tilt mechanism and connects an output shaft of an electric motor and a worm shaft of a speed reduction mechanism, and is appropriately configured with a simple and inexpensive configuration. It is an object of the present invention to provide a steering device including a shaft coupling capable of aligning a worm shaft.

上記の課題を達成するため、本発明は、車体に対しステアリングコラムを前後方向に駆動する電動テレスコピック機構及び前記ステアリングコラムを上下方向に駆動する電動チルト機構の少なくとも一方の機構を備えた車両のステアリング装置において、前記少なくとも一方の機構が、前記ステアリングコラムに支持される電動モータと、該電動モータの出力軸に連結され、ウォーム軸を中心に回転するウォームギヤ及び該ウォームギヤに噛合するホイールギヤを有する減速機構と、軸方向に延在し円周方向に等間隔で配設される複数の係合凸部を一端部に有し、他端部が前記出力軸及び前記ウォーム軸の一方に連結される第１の継手、及び、軸方向に延在し円周方向に等間隔で配設され、前記複数の係合凸部に係合可能な複数の係合凹部を一端部に有し、他端部が前記出力軸及び前記ウォーム軸の他方に連結される第２の継手を具備し、前記第１の継手及び前記第２の継手を介して前記出力軸及び前記ウォーム軸を連結する軸継手と、前記第１の継手と前記第２の継手との間に介装されるウェーブワッシャを備えることとしたものである。   In order to achieve the above object, the present invention provides a vehicle steering system including at least one of an electric telescopic mechanism that drives a steering column in the front-rear direction with respect to a vehicle body and an electric tilt mechanism that drives the steering column in a vertical direction. In the apparatus, the at least one mechanism includes an electric motor supported by the steering column, a worm gear connected to the output shaft of the electric motor and rotating about the worm shaft, and a wheel gear meshing with the worm gear. A mechanism and a plurality of engaging projections extending in the axial direction and arranged at equal intervals in the circumferential direction are provided at one end, and the other end is connected to one of the output shaft and the worm shaft. A plurality of engagement recesses extending in the axial direction and arranged at equal intervals in the circumferential direction and engageable with the plurality of engagement projections; A second joint coupled to the other of the output shaft and the worm shaft, the output shaft and the second joint through the first joint and the second joint. A shaft coupling for connecting a worm shaft, and a wave washer interposed between the first coupling and the second coupling are provided.

上記車両のステアリング装置において、前記第１の継手は、前記一端部と前記他端部の間で径方向に延出する鍔部と、該鍔部の前記係合凸部回りに形成される第１の環状平面部を有し、前記第２の継手は、前記一端部から軸方向に延出し前記鍔部に係止される複数の係止爪部と、前記係合凹部回りの軸方向端面に形成される第２の環状平面部を有し、前記ウェーブワッシャは、前記第１の環状平面部と前記第２の環状平面部との間に配設され、前記複数の係止爪部が前記鍔部に係止された状態で、前記第１の継手と前記第２の継手との間に保持されるものとするとよい。   In the vehicle steering apparatus, the first joint is formed around a flange that extends in a radial direction between the one end and the other end, and around the engagement convex portion of the flange. The second joint has a plurality of locking claws extending in the axial direction from the one end and locked to the flange, and an axial end surface around the engaging recess. And the wave washer is disposed between the first annular plane portion and the second annular plane portion, and the plurality of locking claws are provided on the second annular plane portion. It is good to be hold | maintained between the said 1st coupling and the said 2nd coupling in the state latched by the said collar part.

本発明は上述のように構成されているので以下の効果を奏する。即ち、本発明の車両のステアリング装置においては、電動テレスコピック機構及び電動チルト機構の少なくとも一方の機構が、ステアリングコラムに支持される電動モータと、該電動モータの出力軸に連結され、ウォーム軸を中心に回転するウォームギヤ及び該ウォームギヤに噛合するホイールギヤを有する減速機構と、軸方向に延在し円周方向に等間隔で配設される複数の係合凸部を一端部に有し、他端部が出力軸及びウォーム軸の一方に連結される第１の継手、及び、軸方向に延在し円周方向に等間隔で配設され、複数の係合凸部に係合可能な複数の係合凹部を一端部に有し、他端部が出力軸及びウォーム軸の他方に連結される第２の継手を具備し、第１の継手及び第２の継手を介して出力軸及びウォーム軸を連結する軸継手と、第１の継手と第２の継手との間に介装されるウェーブワッシャを備えたものであるので、ウォーム軸を適切に調芯することができる。しかも、前述のカップリング装置に比し部品点数が少なく、組付作業が容易であり、軽量化及びコストダウンが可能となる。   Since this invention is comprised as mentioned above, there exist the following effects. That is, in the vehicle steering apparatus of the present invention, at least one of the electric telescopic mechanism and the electric tilt mechanism is connected to the electric motor supported by the steering column and the output shaft of the electric motor, and is centered on the worm shaft. A speed reduction mechanism having a worm gear that rotates in rotation and a wheel gear that meshes with the worm gear, and a plurality of engaging projections that extend in the axial direction and are arranged at equal intervals in the circumferential direction at one end and the other end A first joint coupled to one of the output shaft and the worm shaft, and a plurality of joints extending in the axial direction and arranged at equal intervals in the circumferential direction and engageable with the plurality of engaging projections An engagement recess is provided at one end, and the other end is connected to the other of the output shaft and the worm shaft, and the output shaft and the worm shaft are connected via the first joint and the second joint. A shaft coupling connecting the first and the first Since those having a wave washer is interposed between the hand and the second joint, it can be properly aligning the worm shaft. In addition, the number of parts is smaller than that of the coupling device described above, the assembling work is easy, and the weight can be reduced and the cost can be reduced.

特に、第１の継手は、一端部と他端部の間で径方向に延出する鍔部と、該鍔部の係合凸部回りに形成される第１の環状平面部を有し、第２の継手は、一端部から軸方向に延出し鍔部に係止される複数の係止爪部と、係合凹部回りの軸方向端面に形成される第２の環状平面部を有し、ウェーブワッシャは、第１の環状平面部と第２の環状平面部との間に配設され、複数の係止爪部が鍔部に係止された状態で、第１の継手と第２の継手との間に保持されるものとすれば、ウェーブワッシャにより回転方向及び軸方向のガタを吸収し、上記の軸継手の連結状態を適切に維持することができる。   In particular, the first joint has a flange extending in the radial direction between the one end and the other end, and a first annular flat portion formed around the engagement convex portion of the flange, The second joint has a plurality of locking claws extending in the axial direction from one end and locked to the flange, and a second annular flat surface formed on the axial end surface around the engaging recess. The wave washer is disposed between the first annular flat surface portion and the second annular flat surface portion, and the first joint and the second joint in a state where the plurality of locking claw portions are locked to the collar portion. If it is hold | maintained between these couplings, the backlash of a rotation direction and an axial direction can be absorbed with a wave washer, and the connection state of said shaft coupling can be maintained appropriately.

本発明の一実施形態に供する電動モータ、軸継手及び減速機構を示す部分断面図である。It is a fragmentary sectional view showing an electric motor, a shaft coupling, and a speed-reduction mechanism used for one embodiment of the present invention. 本発明の一実施形態に供する軸継手及びウォーム軸を示す断面図である。It is sectional drawing which shows the shaft coupling and worm shaft which are provided to one Embodiment of this invention. 本発明の一実施形態に供する第１の継手、ウェーブワッシャ及び第２の継手を示す斜視図である。It is a perspective view which shows the 1st coupling | joint used for one Embodiment of this invention, a wave washer, and a 2nd coupling | joint. 本発明の一実施形態に供する第１の継手、ウェーブワッシャ、第２の継手及びウォーム軸を示す側面図である。It is a side view showing the 1st joint, wave washer, 2nd joint, and worm shaft which are provided for one embodiment of the present invention. 本発明の一実施形態に供する軸継手及びウォーム軸の組付状態を示す側面図である。It is a side view which shows the assembly | attachment state of the shaft coupling and worm shaft which are provided to one Embodiment of this invention. 本発明の一実施形態に係るステアリング装置を示す側面図である。It is a side view which shows the steering device which concerns on one Embodiment of this invention.

以下、本発明の望ましい実施形態について図面を参照して説明する。図６は本発明の一実施形態に係るステアリング装置の全体構成を示すもので、電動テレスコピック機構ＴＳ及び電動チルト機構ＴＬを備えており、これらの機構は何れもステアリングコラムＳＣに支持される電動モータ１によって駆動され、電動モータ１には減速機構２が連結されるが、本実施形態では、両者間に軸継手（カップリングとも呼ばれ、図１に３で示す）が介装されている。即ち、図１に一方の機構に供される駆動部の主要構造を示すように、減速機構２は、ウォーム軸２０を中心に回転するウォームギヤ２０ａ及びこれに噛合するホイールギヤ２ａを有し、ウォーム軸２０は軸継手３を介して電動モータ１に連結される。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 6 shows an overall configuration of a steering apparatus according to an embodiment of the present invention, which includes an electric telescopic mechanism TS and an electric tilt mechanism TL, both of which are electric motors supported by a steering column SC. 1, a reduction mechanism 2 is connected to the electric motor 1. In this embodiment, a shaft coupling (also called a coupling, indicated by 3 in FIG. 1) is interposed therebetween. That is, as shown in FIG. 1 showing the main structure of the drive unit provided for one mechanism, the speed reduction mechanism 2 includes a worm gear 20a that rotates about a worm shaft 20 and a wheel gear 2a that meshes with the worm gear 20, The shaft 20 is connected to the electric motor 1 through the shaft coupling 3.

本実施形態の軸継手３は、合成樹脂製の第１の継手３０及び第２の継手４０を備え、図１乃至図４に示すように、第１の継手３０は、軸方向に延在し円周方向に等間隔で配設される複数の係合凸部（代表して３３で表す）を一端部に有し、他端部（円柱部３１）が出力軸１０に連結される。一方、第２の継手４０は、軸方向に延在し円周方向に等間隔で配設され、上記複数の係合凸部３３に係合可能な複数の係合凹部（代表して４３で表す）を一端部に有し、他端部（円筒部４１）がウォーム軸２０に連結される。そして、第１の継手３０と第２の継手４０との間にウェーブワッシャ５０が介装され、両者間を拡開する方向に付勢される。   The shaft joint 3 of the present embodiment includes a first joint 30 and a second joint 40 made of synthetic resin, and as shown in FIGS. 1 to 4, the first joint 30 extends in the axial direction. A plurality of engaging projections (typically represented by 33) disposed at equal intervals in the circumferential direction are provided at one end, and the other end (column 31) is coupled to the output shaft 10. On the other hand, the second joint 40 extends in the axial direction and is arranged at equal intervals in the circumferential direction, and is provided with a plurality of engagement recesses (typically 43) that can engage with the plurality of engagement projections 33. The other end portion (cylindrical portion 41) is connected to the worm shaft 20. And the wave washer 50 is interposed between the 1st coupling 30 and the 2nd coupling 40, and is urged | biased in the direction which expands between both.

図２に軸継手３及びウォーム軸２０の横断面を示し、図３に軸継手３の斜視図を示すように、第１の継手３０は、両端部間で径方向に延出する鍔部３２と、鍔部３２の係合凸部３３回りに形成される第１の環状平面部３４を有する。第２の継手４０は、一端部から軸方向に延出し鍔部３２に係止される複数の係止爪部（代表して４２で表す）と、係合凹部４３回りの軸方向端面に形成される第２の環状平面部４４を有する。図示は省略するが、出力軸１０の端部は所謂二面幅に形成されており、この端部が第１の継手３０の連結孔（符号省略）に嵌合され、ウォーム軸２０の連結部２０ｂは第２の継手４０の連結孔（符号省略）にセレーション結合され、軸継手３を介して出力軸１０とウォーム軸２０が連結される。   2 shows a cross section of the shaft joint 3 and the worm shaft 20, and FIG. 3 shows a perspective view of the shaft joint 3. The first joint 30 has a flange 32 extending radially between both ends. And a first annular flat surface portion 34 formed around the engaging convex portion 33 of the flange portion 32. The second joint 40 extends from one end portion in the axial direction and is formed on a plurality of locking claw portions (typically represented by 42) locked to the flange portion 32, and an axial end surface around the engaging recess 43. The second annular flat surface portion 44 is provided. Although illustration is omitted, the end of the output shaft 10 is formed to have a so-called two-surface width, and this end is fitted into the connection hole (reference numeral omitted) of the first joint 30 to connect the connection portion of the worm shaft 20. 20 b is serrated to a connection hole (reference numeral omitted) of the second joint 40, and the output shaft 10 and the worm shaft 20 are connected via the shaft joint 3.

ウェーブワッシャ５０は図３及び図４に示すように配置され、第１の継手３０と第２の継手４０が組み付けられると、図２及び図５に示すように、第１の環状平面部３４と第２の環状平面部４４との間にウェーブワッシャ５０が配設され、係止爪部４２が鍔部３２に係止された状態で、第１の継手３０と第２の継手４０との間に保持される。このとき、図２に示すように、第１の継手３０と第２の継手４０との間に間隙（ｓ）が形成された状態で両者が連結され、ウェーブワッシャ５０の付勢力によって回転方向及び軸方向のガタが吸収されるので、ウォーム軸２０を適切に調芯することができると共に、出力軸１０及びウォーム軸２０間の適切な連結状態を維持することができる。   The wave washer 50 is arranged as shown in FIGS. 3 and 4, and when the first joint 30 and the second joint 40 are assembled, as shown in FIGS. Between the first joint 30 and the second joint 40 in a state where the wave washer 50 is disposed between the second annular flat surface portion 44 and the locking claw portion 42 is locked to the flange portion 32. Retained. At this time, as shown in FIG. 2, both are connected in a state where a gap (s) is formed between the first joint 30 and the second joint 40, and the rotation direction and the urging force of the wave washer 50 are Since the backlash in the axial direction is absorbed, the worm shaft 20 can be properly aligned and an appropriate connection between the output shaft 10 and the worm shaft 20 can be maintained.

図６に示すステアリング装置におけるその他の構成は、特許文献１の図１に示すステアリング装置と実質的に同じであるので説明は省略する。尚、図示は省略するが、軸継手３における第１の継手３０をウォーム軸２０に連結し、第２の継手４０を出力軸１０に連結することとしてもよい。また、上記のウェーブワッシャ５０に限らず、種々の態様のものを用いることができる。   The other configuration of the steering apparatus shown in FIG. 6 is substantially the same as that of the steering apparatus shown in FIG. Although illustration is omitted, the first joint 30 in the shaft joint 3 may be connected to the worm shaft 20 and the second joint 40 may be connected to the output shaft 10. Moreover, the thing of a various aspect can be used not only in said wave washer 50. FIG.

１ 電動モータ
２ 減速機構
３ 軸継手
１０ 出力軸
２０ ウォーム軸
３０ 第１の継手
３１ 円柱部
３２ 鍔部
３３ 係合凸部
３４ 第１の環状平面部
４０ 第２の継手
４１ 円筒部
４２ 係止爪部
４３ 係合凹部
４４ 第２の環状平面部
５０ ウェーブワッシャ DESCRIPTION OF SYMBOLS 1 Electric motor 2 Deceleration mechanism 3 Shaft joint 10 Output shaft 20 Worm shaft 30 1st joint 31 Cylindrical part 32 ridge part 33 Engaging convex part 34 1st annular plane part 40 2nd joint 41 Cylindrical part 42 Claw Part 43 Engaging recess 44 Second annular plane part 50 Wave washer

Claims (2)

車体に対しステアリングコラムを前後方向に駆動する電動テレスコピック機構及び前記ステアリングコラムを上下方向に駆動する電動チルト機構の少なくとも一方の機構を備えた車両のステアリング装置であって、
前記少なくとも一方の機構が、
前記ステアリングコラムに支持される電動モータと、
該電動モータの出力軸に連結され、ウォーム軸を中心に回転するウォームギヤ及び該ウォームギヤに噛合するホイールギヤを有する減速機構と、
軸方向に延在し円周方向に等間隔で配設される複数の係合凸部を一端部に有し、他端部が前記出力軸及び前記ウォーム軸の一方に連結される第１の継手、及び、軸方向に延在し円周方向に等間隔で配設され、前記複数の係合凸部に係合可能な複数の係合凹部を一端部に有し、他端部が前記出力軸及び前記ウォーム軸の他方に連結される第２の継手を具備し、前記第１の継手及び前記第２の継手を介して前記出力軸及び前記ウォーム軸を連結する軸継手と、
前記第１の継手と前記第２の継手との間に介装されるウェーブワッシャを備えたことを特徴とする車両のステアリング装置。 A vehicle steering apparatus comprising at least one of an electric telescopic mechanism that drives a steering column in the front-rear direction with respect to a vehicle body and an electric tilt mechanism that drives the steering column in a vertical direction,
The at least one mechanism is
An electric motor supported by the steering column;
A reduction mechanism having a worm gear connected to the output shaft of the electric motor and rotating around the worm shaft and a wheel gear meshing with the worm gear;
A plurality of engaging protrusions extending in the axial direction and arranged at equal intervals in the circumferential direction at one end, and the other end connected to one of the output shaft and the worm shaft; The joint has a plurality of engagement recesses extending in the axial direction and arranged at equal intervals in the circumferential direction and engageable with the plurality of engagement protrusions at one end, and the other end is the A second joint connected to the other of the output shaft and the worm shaft, and a shaft joint connecting the output shaft and the worm shaft via the first joint and the second joint;
A vehicle steering apparatus comprising a wave washer interposed between the first joint and the second joint. 前記第１の継手は、前記一端部と前記他端部の間で径方向に延出する鍔部と、該鍔部の前記係合凸部回りに形成される第１の環状平面部を有し、
前記第２の継手は、前記一端部から軸方向に延出し前記鍔部に係止される複数の係止爪部と、前記係合凹部回りの軸方向端面に形成される第２の環状平面部を有し、
前記ウェーブワッシャは、前記第１の環状平面部と前記第２の環状平面部との間に配設され、前記複数の係止爪部が前記鍔部に係止された状態で、前記第１の継手と前記第２の継手との間に保持されることを特徴とする請求項１記載の車両のステアリング装置。 The first joint has a flange extending in the radial direction between the one end and the other end, and a first annular flat portion formed around the engagement convex portion of the flange. And
The second joint includes a plurality of locking claws extending in the axial direction from the one end and locked to the flange, and a second annular plane formed on an axial end surface around the engaging recess. Part
The wave washer is disposed between the first annular flat surface portion and the second annular flat surface portion, and in the state where the plurality of locking claw portions are locked to the collar portion, The vehicle steering apparatus according to claim 1, wherein the vehicle steering apparatus is held between the second joint and the second joint.
JP2017132066A 2017-07-05 2017-07-05 Steering device for vehicle Pending JP2019014343A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210059982A (en) * 2019-11-18 2021-05-26 현대모비스 주식회사 Motor-driven steering column apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210059982A (en) * 2019-11-18 2021-05-26 현대모비스 주식회사 Motor-driven steering column apparatus
KR102667921B1 (en) 2019-11-18 2024-05-22 현대모비스 주식회사 Motor-driven steering column apparatus

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