JP2015182521A - Vehicle steering device - Google Patents

Vehicle steering device Download PDF

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JP2015182521A
JP2015182521A JP2014059306A JP2014059306A JP2015182521A JP 2015182521 A JP2015182521 A JP 2015182521A JP 2014059306 A JP2014059306 A JP 2014059306A JP 2014059306 A JP2014059306 A JP 2014059306A JP 2015182521 A JP2015182521 A JP 2015182521A
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shaft
tilt
screw
nut
nut member
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克哉 今泉
Katsuya Imaizumi
克哉 今泉
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Aisin Corp
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Aisin Seiki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a steering device which can inexpensively prevent wobbling between a tilt screw shaft of a tilt mechanism and a nut member by a small number of part items.SOLUTION: A vehicle steering device comprises: a tilt screw shaft 62 which supports a vehicle body rear-side end part to a main housing so as to be oscillatory, and rotates by motor drive; a nut member 50 which has a female screw part 51 screwed to the tilt screw shaft, and axially moves according to the rotation of the tilt screw shaft; and a link mechanism 4 which is supported to the nut member so as to be oscillatory, and also supported to the main housing and a fixed bracket so as to be oscillatory. The vehicle steering device further comprises a magnet member 70 which is held to the nut member in a position in which the magnet member can impart a magnetic force to the tilt screw shaft, and prevents wobbling between the tilt screw shaft and the nut member by the magnetic force.

Description

本発明は、車両のステアリング装置に関し、特に、車体に対しステアリングコラムを揺動可能に支持しステアリングホイールの操作位置を調整し得るステアリング装置に係る。   The present invention relates to a steering device for a vehicle, and more particularly to a steering device that can swing a steering column with respect to a vehicle body and adjust an operation position of a steering wheel.

上記ステアリング装置において、ステアリングホイールの操作位置を調整し得る機構として、車体前後方向の操作位置を調整し得るテレスコピック機構と、車体上下方向の操作位置を調整し得るチルト機構が用いられているが、特にチルト機構においては、チルト螺子軸とナット部材との間のガタを防止し、円滑な摺動性を確保することが肝要である。例えば下記の特許文献1には、シャフト(チルト螺子軸)とスライダ(ナット部材)で構成されるスライダ機構に関し、「駆動源の出力軸に連動して回転する雄ネジ部を有するシャフトと、前記シャフトの回転方向に回転規制されつつ前記雄ネジ部のまわりに配設され前記雄ネジ部と噛み合うとともに駆動対象と連動する略円筒状の雌ネジ部材と、前記雌ネジ部材を径方向へ付勢する付勢部材と、前記雄ネジ部に当接する当接部を有するとともに前記付勢部材の付勢力の反力を受け前記反力が前記雄ネジ部と前記当接部との当接力として作用する押し付け部材とを有することを特徴とするスライダ機構」が提案され、「略円筒状の雌ネジ部材は付勢部材の付勢力により径方向へ付勢されシャフトの雄ネジ部に確実に当接し、かつ、その付勢力の反力は押し付け部材が受け、押し付け部材の当接部が確実にシャフトの雄ネジ部に当接することで、ネジの噛み合い部のバックラッシュは、強制的に除去されるものである。」と記載されると共に、「また、バックラッシュの除去に、樹脂製のナットの変形を利用していないので、従来技術のようなナットのヤング率の変化によるネジ機構部のすべり摩擦トルクの変動が生じない。さらには、本発明においてナットに樹脂材料を、シャフトに金属材料を使用した場合においても、従来技術のようなナットの変形を利用していないので、低温時のしまりばめぎみの状態は生じにくい。」と記載されている。   In the steering device, as a mechanism that can adjust the operation position of the steering wheel, a telescopic mechanism that can adjust the operation position in the longitudinal direction of the vehicle body and a tilt mechanism that can adjust the operation position in the vertical direction of the vehicle body are used. Particularly in the tilt mechanism, it is important to prevent backlash between the tilt screw shaft and the nut member and to ensure smooth slidability. For example, the following Patent Document 1 relates to a slider mechanism including a shaft (tilt screw shaft) and a slider (nut member), “a shaft having a male screw portion that rotates in conjunction with an output shaft of a drive source; A substantially cylindrical female screw member that is disposed around the male screw portion while being rotationally restricted in the rotation direction of the shaft and meshes with the male screw portion and interlocks with the drive target, and biases the female screw member in the radial direction And an abutting portion that abuts against the male screw portion and receives a reaction force of the urging force of the urging member, and the reaction force acts as an abutting force between the male screw portion and the abutting portion. A `` slider mechanism characterized in that it has a pressing member '', and `` the substantially cylindrical female screw member is urged in the radial direction by the urging force of the urging member and reliably contacts the male screw portion of the shaft. And its energizing power The reaction force is received by the pressing member, and the contact portion of the pressing member reliably contacts the male screw portion of the shaft, so that the backlash of the meshing portion of the screw is forcibly removed. " “Also, since the deformation of the resin nut is not used to remove the backlash, there is no variation in the sliding friction torque of the screw mechanism due to the change in the Young's modulus of the nut as in the prior art. Furthermore, even when a resin material is used for the nut and a metal material is used for the shaft in the present invention, the deformation of the nut as in the prior art is not utilized, so that a tight-fitting state at low temperatures occurs. It is difficult. "

また、下記の特許文献2には、「駆動源の出力軸に連動して回転する雄ネジ部を有するシャフトと、前記雄ネジ部と噛み合うとともに、駆動対象と連動する第1ナット及び第2ナットと、前記第1ナットと前記第2ナットとを一体化し相対回転を禁止する固定機構と、前記第1ナットと前記第2ナットとの間に狭持された弾性体と、を有し、前記固定機構は脱着可能であり、前記第1ナットと前記第2ナットとを相対回転させることにより、前記弾性体の前記第1ナット及び第2ナットへの付勢力を調整可能とするチルトスライダ機構」が提案され、「弾性体の付勢力により、第1ナットと第2ナットは、シャフトの雄ネジ面に対し、互いに逆向きへ押し付けられ、その結果、ネジの噛み合い部のバックラッシュは、強制的に除去される」と記載されている。   Further, the following Patent Document 2 states that “a shaft having a male screw portion that rotates in conjunction with an output shaft of a drive source, and a first nut and a second nut that mesh with the male screw portion and that are linked with a drive target. A fixing mechanism for integrating the first nut and the second nut and prohibiting relative rotation, and an elastic body sandwiched between the first nut and the second nut, The fixing mechanism is detachable, and a tilt slider mechanism capable of adjusting the urging force of the elastic body to the first nut and the second nut by relatively rotating the first nut and the second nut. "By the biasing force of the elastic body, the first nut and the second nut are pressed against each other in the opposite directions against the male thread surface of the shaft. As a result, the backlash of the screw meshing portion is forced. To be removed " It has been mounting.

更に、下記の特許文献3には、「ステアリングシャフトを回転自在に支持するステアリングコラムを、チルト方向又はテレスコ方向に対して位置調整可能に駆動する電動式ステアリングコラム装置において、モータと、前記モータにより回転駆動される回転体と、前記回転体の回転に応じて軸線方向に変位することにより、前記ステアリングコラムをチルト方向又はテレスコ方向に駆動する軸線方向変位体と、を有し、前記回転体の熱膨張係数と前記軸線方向変位体の熱膨張係数とは略等しく、更に前記回転体と前記軸線方向変位体の一方の周面には、樹脂材が接合されており、前記樹脂材は、金属製である他方の周面に形成されたねじ部に螺合するねじ部を有する」装置が提案されている。そして、この装置によれば、「前記回転体の熱膨張係数と前記軸線方向変位体の熱膨張係数とは略等しいので、前記電動式ステアリングコラム装置を配置する車室内の環境温度が大きく変化した場合にも、両者間での膨張量又は収縮量を略等しくすることができ、ガタの発生や競り合いなどを抑制することができる。」と記載されている。   Further, in Patent Document 3 below, in an electric steering column apparatus that drives a steering column that rotatably supports a steering shaft so that the position of the steering column can be adjusted with respect to a tilt direction or a telescopic direction, the motor and the motor A rotating body that is rotationally driven, and an axial direction displacement body that drives the steering column in a tilt direction or a telescopic direction by being displaced in the axial direction in accordance with the rotation of the rotating body. The thermal expansion coefficient and the thermal expansion coefficient of the axial direction displacement body are substantially equal, and a resin material is bonded to one circumferential surface of the rotating body and the axial direction displacement body. There has been proposed a device having a threaded portion that is threadedly engaged with a threaded portion formed on the other peripheral surface. According to this device, “the thermal expansion coefficient of the rotating body and the thermal expansion coefficient of the axial displacement body are substantially equal, so the environmental temperature in the vehicle compartment in which the electric steering column device is disposed has changed greatly. Even in this case, the amount of expansion or contraction between the two can be made substantially equal, and the occurrence of backlash and competition can be suppressed. "

特開2000−280916号公報JP 2000-280916 A 特開2000−085592号公報JP 2000-085592 A 特開2009−248703号公報JP 2009-248703 A

上記特許文献1に記載のチルト機構においては、付勢部材(ばね)や押し付け部材等が必要となり、部品点数や組付工数が多く、組付時に付勢力の調整が必要となるので、組付コストが大となる。また、上記特許文献2に記載の装置においても第2ナットや固定機構が必要となり、部品点数や組付工数が多く、しかも、第1ナットと第2ナットとを相対回転させることにより、弾性体の第1ナット及び第2ナットへの付勢力を調整することとしているので、組付コストが大となる。一方、上記特許文献3に記載の装置においては、回転体(チルト螺子軸)と軸線方向変位体(ナット部材)の製造バラツキにより、螺子寸法はある範囲内でばらつくが、その初期バラツキを吸収することができないため、初期バラツキに起因するガタ及び締まりを防止することはできない。また、回転体と軸線方向変位体のねじ部の一方が樹脂製で他方が金属製であるので、螺合する両者間で線膨張係数差が生じ(線膨張係数差をゼロにはできない)、環境温度の変化によるガタや締まりの発生が懸念される。   In the tilt mechanism described in Patent Document 1, an urging member (spring), a pressing member, and the like are required, and the number of parts and the number of assembling steps are large, and adjustment of the urging force is necessary at the time of assembling. Cost is high. Further, the device described in Patent Document 2 also requires a second nut and a fixing mechanism, which requires a large number of parts and assembly steps, and by rotating the first nut and the second nut relative to each other, the elastic body Since the urging force to the first nut and the second nut is adjusted, the assembling cost increases. On the other hand, in the apparatus described in Patent Document 3, although the screw size varies within a certain range due to the manufacturing variation of the rotating body (tilt screw shaft) and the axial displacement body (nut member), the initial variation is absorbed. Therefore, backlash and tightening due to initial variations cannot be prevented. In addition, since one of the screw portions of the rotating body and the axial displacement body is made of resin and the other is made of metal, a linear expansion coefficient difference occurs between the two screwed together (the linear expansion coefficient difference cannot be zero), There is concern over the occurrence of looseness and tightening due to changes in environmental temperature.

そこで、本発明は、少なくとも車体上下方向のステアリングホイール操作位置を調整し得る車両のステアリング装置において、その駆動機構を構成するチルト螺子軸とナット部材との間のガタの防止を、少ない部品点数で安価に実現し得る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 provides a vehicle steering apparatus capable of adjusting at least the steering wheel operating position in the vertical direction of the vehicle body, and prevents backlash between the tilt screw shaft and the nut member constituting the drive mechanism with a small number of parts. It is an object to provide a steering device that can be realized at low cost.

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シャフトを揺動可能に支持するメインハウジングと、当該車体に固定する固定ブラケットとを連結し、前記ステアリングシャフトを所望の傾斜角度に調整する電動チルト機構を備えた車両のステアリング装置において、前記電動チルト機構が、前記メインハウジングに揺動可能に支持される電動モータと、前記メインハウジングに揺動可能に支持され、前記電動モータに回転駆動されるチルト螺子軸と、該チルト螺子軸に螺合する雌螺子部を有し、当該チルト螺子軸の回転駆動に応じて軸方向移動するナット部材と、該ナット部材に揺動可能に支持されると共に、前記メインハウジング及び前記固定ブラケットに対し揺動可能に支持されるリンク機構と、前記チルト螺子軸に対して磁力を付与し得る位置で前記ナット部材に保持される磁石部材とを備えることとしたものである。   In order to achieve the above object, the present invention connects a main housing that supports a steering shaft so as to be swingable with respect to a vehicle body and a fixed bracket that is fixed to the vehicle body, and adjusts the steering shaft to a desired inclination angle. In the vehicle steering apparatus including the electric tilt mechanism, the electric tilt mechanism is swingably supported by the main housing, and is swingably supported by the main housing and is rotated by the electric motor. A tilt screw shaft to be driven, a female screw portion engaged with the tilt screw shaft, a nut member that moves in the axial direction in accordance with the rotational drive of the tilt screw shaft, and a swingable support to the nut member And a link mechanism that is swingably supported with respect to the main housing and the fixed bracket, and the tilt screw shaft. It is in a position capable of imparting a magnetic force which was decided and a magnet member which is held by the nut member Te.

上記のステアリング装置において、前記ナット部材は、前記雌螺子部に連通する開口部を有し、該開口部内に前記磁石部材を収容した状態で当該開口部に固定される蓋部材を具備する構成とするとよい。特に、前記ナット部材の開口部の内周面に雌螺子が形成されると共に、前記蓋部材の外周面に雄螺子が形成され、前記蓋部材が前記開口部に螺合されるように構成するとよい。   In the above steering apparatus, the nut member has an opening communicating with the female screw portion, and includes a lid member fixed to the opening in a state where the magnet member is accommodated in the opening. Good. In particular, a female screw is formed on the inner peripheral surface of the opening of the nut member, a male screw is formed on the outer peripheral surface of the lid member, and the lid member is screwed into the opening. Good.

あるいは、前記ナット部材は、前記雌螺子部の軸に直交するように形成され前記リンク機構に揺動可能に支持されるピボット軸部を有し、該ピボット軸部内に前記磁石部材を収容した状態で当該ピボット軸部を回転可能に支持するピボット螺子を具備する構成としてもよい。特に、前記磁石部材は、前記ピボット螺子の先端面に接合されるように構成するとよい。   Alternatively, the nut member has a pivot shaft portion that is formed so as to be orthogonal to the axis of the female screw portion and is swingably supported by the link mechanism, and the magnet member is accommodated in the pivot shaft portion It is good also as a structure which comprises the pivot screw which supports the said pivot shaft part rotatably. In particular, the magnet member may be configured to be joined to the tip surface of the pivot screw.

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、本発明のステアリング装置においては、電動チルト機構が、メインハウジングに揺動可能に支持される電動モータと、メインハウジングに揺動可能に支持され、電動モータに回転駆動されるチルト螺子軸と、このチルト螺子軸に螺合する雌螺子部を有し、当該チルト螺子軸の回転駆動に応じて軸方向移動するナット部材と、このナット部材に揺動可能に支持されると共に、メインハウジング及び固定ブラケットに対し揺動可能に支持されるリンク機構と、チルト螺子軸に対して磁力を付与し得る位置でナット部材に保持される磁石部材とを備えたものであるので、従来に比し少ない部品点数でチルト螺子軸とナット部材との間のガタを適切に防止することができ、安価な装置を提供することができる。   Since this invention is comprised as mentioned above, there exist the following effects. That is, in the steering device of the present invention, the electric tilt mechanism includes an electric motor that is swingably supported by the main housing, and a tilt screw shaft that is swingably supported by the main housing and is rotationally driven by the electric motor. A nut member that has a female screw portion that engages with the tilt screw shaft, moves in the axial direction in accordance with the rotational drive of the tilt screw shaft, and is supported by the nut member in a swingable manner. Since it is provided with a link mechanism that is swingably supported with respect to the fixed bracket and a magnet member that is held by the nut member at a position where a magnetic force can be applied to the tilt screw shaft, it is less than in the prior art. The backlash between the tilt screw shaft and the nut member can be appropriately prevented by the number of parts, and an inexpensive device can be provided.

例えば、ナット部材は、雌螺子部に連通する開口部を有し、この開口部内に磁石部材を収容した状態で当該開口部に固定される蓋部材を具備するように構成すれば、磁石部材を容易にナット部材に保持することができる。特に、ナット部材の開口部の内周面に雌螺子が形成されると共に、蓋部材の外周面に雄螺子が形成され、蓋部材が開口部に螺合される構成とすれば、磁石部材を容易にナット部材に装着し、確実に保持することができる。   For example, if the nut member has an opening communicating with the female screw portion, and the lid member is fixed to the opening in a state in which the magnet member is accommodated in the opening, the magnet member It can be easily held on the nut member. In particular, if the female screw is formed on the inner peripheral surface of the opening of the nut member, the male screw is formed on the outer peripheral surface of the lid member, and the lid member is screwed into the opening, the magnet member It can be easily attached to the nut member and securely held.

あるいは、ナット部材は、雌螺子部の軸に直交するように形成されリンク機構に揺動可能に支持されるピボット軸部を有し、このピボット軸部内に磁石部材を収容した状態で当該ピボット軸部を回転可能に支持するピボット螺子を具備する構成とすれば、磁石部材を容易にナット部材に装着し、確実に保持することができ、上記の構成より一層少ない部品点数でチルト螺子軸とナット部材との間のガタを防止することができる。更に、前述のように、磁石部材がピボット螺子の先端面に接合される構成とすれば、磁石部材を容易にピボット軸部内に収容し、確実に保持することができる。   Alternatively, the nut member has a pivot shaft portion that is formed so as to be orthogonal to the axis of the female screw portion and is swingably supported by the link mechanism, and the pivot shaft in a state where the magnet member is accommodated in the pivot shaft portion. If the structure is provided with a pivot screw that rotatably supports the part, the magnet member can be easily attached to the nut member and securely held, and the tilt screw shaft and the nut can be held with fewer parts than the above structure. The backlash between the members can be prevented. Further, as described above, if the magnet member is joined to the tip end surface of the pivot screw, the magnet member can be easily accommodated in the pivot shaft portion and securely held.

本発明の一実施形態において、ナット部材に対し、チルト螺子軸を組み付けると共に磁石部材を装着する状態を示す斜視図である。In one embodiment of the present invention, it is a perspective view showing a state where a tilt screw shaft is assembled to a nut member and a magnet member is mounted. 本発明の一実施形態において、ナット部材にチルト螺子軸を螺合した状態を示す斜視図である。In one Embodiment of this invention, it is a perspective view which shows the state which screwed the tilt screw shaft in the nut member. 本発明の一実施形態において、組み付け後のナット部材及び磁石部材とチルト螺子軸との関係を示す断面図である。In one Embodiment of this invention, it is sectional drawing which shows the relationship between the nut member and magnet member after an assembly | attachment, and a tilt screw shaft. 本発明の他の実施形態において、磁石部材をピボット軸部内に収容すると共に、ピボット螺子によってナット部材をリンク部材に支持する状態を示す斜視図である。In other embodiment of this invention, while accommodating a magnet member in a pivot axial part, it is a perspective view which shows the state which supports a nut member on a link member with a pivot screw. 本発明の他の実施形態において、組み付け後のナット部材及び磁石部材とチルト螺子軸との関係を示す断面図である。In other embodiment of this invention, it is sectional drawing which shows the relationship between the nut member and magnet member after assembly | attachment, and a tilt screw shaft. 本発明に係るステアリング装置の全体構成を示す側面図である。1 is a side view showing an overall configuration of a steering device according to the present invention.

以下、本発明の望ましい実施形態を図面を参照して説明する。先ず、本発明に係るステアリング装置の全体構成を図6を参照して説明する。ステアリングシャフト1は、後端部にステアリングホイールWが接続される筒状のアッパシャフト1aと、このアッパシャフト1aの前端部とスプライン結合されるロアシャフト1bから成る。即ち、アッパシャフト1aとロアシャフト1bが軸方向に相対移動可能に連結されており、ロアシャフト1bの前端部が転舵機構(図示せず)に接続されている。この転舵機構はステアリングホイールWの操作に応じて駆動されて車輪操舵機構(図示せず)を介して操舵輪(図示せず)を転舵するように構成されている。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the overall configuration of the steering apparatus according to the present invention will be described with reference to FIG. The steering shaft 1 includes a cylindrical upper shaft 1a to which a steering wheel W is connected at a rear end portion, and a lower shaft 1b that is spline-coupled to the front end portion of the upper shaft 1a. That is, the upper shaft 1a and the lower shaft 1b are coupled so as to be relatively movable in the axial direction, and the front end portion of the lower shaft 1b is connected to a turning mechanism (not shown). The steering mechanism is driven in accordance with the operation of the steering wheel W and is configured to steer a steered wheel (not shown) via a wheel steering mechanism (not shown).

そして、ステアリングシャフト1と同軸にメインハウジング10が配置され、車体Bに対する揺動中心C回りに揺動可能に支持されると共に、固定ブラケット30に保持される。この固定ブラケット30は、車両の下方に延出して対向する一対の保持部(代表して31で表す)を有し、これらの間にメインハウジング10が保持され、図6の上方で車体Bに固定される。更に、固定ブラケット30の一対の保持部31とメインハウジング10との間に、夫々押圧機構(図示せず)が介装され、これによってメインハウジング10が摺動自在に押圧支持される。   A main housing 10 is disposed coaxially with the steering shaft 1, is supported so as to be swingable about a swing center C with respect to the vehicle body B, and is held by a fixed bracket 30. The fixed bracket 30 has a pair of holding portions (represented by 31 as a representative) that extend downward from the vehicle and face each other. The main housing 10 is held between these holding portions. Fixed. Further, a pressing mechanism (not shown) is interposed between the pair of holding portions 31 of the fixing bracket 30 and the main housing 10, whereby the main housing 10 is slidably pressed and supported.

メインハウジング10内には、可動コラム部材20が軸方向に移動可能、即ち、車体前後方向に移動可能に支持されている。この可動コラム部材20として、ステアリングシャフト1を収容し軸を中心に回転可能に支持する金属製のインナチューブ21と、このインナチューブ21を収容し常時はインナチューブ21を所定位置に保持する金属製のアウタチューブ22が設けられており、インナチューブ21はアッパチューブとも呼ばれ、アウタチューブ22はロアチューブとも呼ばれる。アッパシャフト1aは、インナチューブ21の後端部に軸受(図示せず)を介して回転可能に支持されるが、アッパシャフト1aとインナチューブ21との間の軸方向相対移動は規制され、アッパシャフト1aとインナチューブ21は一体となって軸方向移動し得るように構成されている。   A movable column member 20 is supported in the main housing 10 so as to be movable in the axial direction, that is, movable in the longitudinal direction of the vehicle body. As the movable column member 20, a metal inner tube 21 that houses the steering shaft 1 and supports it rotatably around an axis, and a metal that houses the inner tube 21 and holds the inner tube 21 at a predetermined position at all times. The outer tube 22 is provided, the inner tube 21 is also called an upper tube, and the outer tube 22 is also called a lower tube. The upper shaft 1a is rotatably supported by a rear end portion of the inner tube 21 via a bearing (not shown), but the axial relative movement between the upper shaft 1a and the inner tube 21 is restricted, and the upper shaft 1a The shaft 1a and the inner tube 21 are configured so as to be able to move in the axial direction together.

而して、メインハウジング10に対し、アウタチューブ22、インナチューブ21、ステアリングシャフト1及びステアリングホイールWが一体となって軸方向に移動可能とされてテレスコピック機構(駆動機構の図示は省略)が構成され、これにより、ステアリングホイールを所望の車体前後方向位置に調整することができる。更に、ステアリングシャフト1に対し所定値以上の荷重が印加されたときには、アウタチューブ22に対するインナチューブ21の軸方向相対移動(ひいてはアッパシャフト1aの軸方向移動)を許容するように構成されており、本実施形態のインナチューブ21及びアウタチューブ22は、両者間に介装される環状の摩擦材(例えば、金属製弾性ブッシュ)等と共に、エネルギー吸収手段として機能する。   Thus, the outer tube 22, the inner tube 21, the steering shaft 1 and the steering wheel W are integrally movable with respect to the main housing 10, so that a telescopic mechanism (the drive mechanism is not shown) is configured. Thus, the steering wheel can be adjusted to a desired position in the longitudinal direction of the vehicle body. Further, when a load equal to or greater than a predetermined value is applied to the steering shaft 1, the inner tube 21 is allowed to move in the axial direction relative to the outer tube 22 (and thus the upper shaft 1a moves in the axial direction). The inner tube 21 and the outer tube 22 of the present embodiment function as energy absorbing means together with an annular friction material (for example, a metal elastic bush) interposed between them.

一方、固定ブラケット30には、リンク機構4の一端が支持され、その他端が駆動機構5に連結されており、駆動機構5はメインハウジング10に揺動可能に支持されている。この駆動機構5によって、リンク機構4を介して可動コラム部材20が車体に対して揺動可能とされてチルト機構3が構成され、これにより、ステアリングホイールWを所望の車体上下方向位置に調整することができる。本実施形態のリンク機構4は、図6に示すように、固定ブラケット30の下方に、第1のリンク(一対のリンク部材41で構成される)の上端部がピボット軸P1を中心に回転可能に支持され、その下端部が、第2のリンク(リンク部材42で構成される)の後方上端部にピボット軸P2を中心に回転可能に支持されている。   On the other hand, one end of the link mechanism 4 is supported on the fixed bracket 30, and the other end is connected to the drive mechanism 5, and the drive mechanism 5 is swingably supported by the main housing 10. The drive mechanism 5 allows the movable column member 20 to swing with respect to the vehicle body via the link mechanism 4 to constitute the tilt mechanism 3, thereby adjusting the steering wheel W to a desired vehicle body vertical position. be able to. In the link mechanism 4 of the present embodiment, as shown in FIG. 6, the upper end portion of the first link (comprising a pair of link members 41) is rotatable about the pivot axis P1 below the fixed bracket 30. The lower end of the second link (configured by the link member 42) is supported by the rear upper end so as to be rotatable about the pivot axis P2.

第2のリンクを構成するリンク部材42はベルクランク状(図4に示す)に形成されており、一対の腕部(図4に42aで示す)の間にメインハウジング10が挟持される形で、メインハウジング10の下方にピボット軸P3を中心に回転可能に支持され、第2のリンク(リンク部材42)の一対の脚部(図4に42bで示す)の間にナット部材50が挟持される形で、リンク部材42がピボット軸P4を中心に回転可能に支持されている。このナット部材50はチルト螺子軸62等と共に駆動機構5を構成し、チルト機構3の駆動源に供されるもので、チルトナットあるいはチルトスライダとも呼ばれる。   The link member 42 constituting the second link is formed in a bell crank shape (shown in FIG. 4), and the main housing 10 is sandwiched between a pair of arm portions (shown by 42a in FIG. 4). The nut member 50 is sandwiched between a pair of leg portions (indicated by 42b in FIG. 4) of the second link (link member 42), which is supported below the main housing 10 so as to be rotatable about the pivot shaft P3. In this manner, the link member 42 is supported rotatably about the pivot axis P4. The nut member 50 constitutes the drive mechanism 5 together with the tilt screw shaft 62 and the like, and is used as a drive source of the tilt mechanism 3 and is also called a tilt nut or a tilt slider.

而して、電動モータ60によるチルト螺子軸62の回転駆動に応じて、ナット部材50がチルト螺子軸62の軸方向に移動すると、第2のリンク(リンク部材42)がピボット軸P3を中心に揺動すると共に、第1のリンク(リンク部材41)がピボット軸P1を中心に揺動し、メインハウジング10(並びに、アウタチューブ22、インナチューブ21、アッパシャフト1a及びステアリングホイールW)が車体上下方向に移動するように構成されている。尚、本実施形態においては、電動モータ60の出力軸とチルト螺子軸62との間に減速機構(図示せず)が介装されており、電動モータ60の出力が適切に減速されてチルト螺子軸62に伝達される。   Thus, when the nut member 50 moves in the axial direction of the tilt screw shaft 62 in response to the rotational drive of the tilt screw shaft 62 by the electric motor 60, the second link (link member 42) is centered on the pivot shaft P3. While swinging, the first link (link member 41) swings about the pivot axis P1, and the main housing 10 (and the outer tube 22, the inner tube 21, the upper shaft 1a, and the steering wheel W) are vertically moved. Configured to move in the direction. In the present embodiment, a reduction mechanism (not shown) is interposed between the output shaft of the electric motor 60 and the tilt screw shaft 62, and the output of the electric motor 60 is appropriately reduced to tilt the screw. It is transmitted to the shaft 62.

本発明の一実施形態に係るナット部材50は、図1及び図2に示すように、台形螺子で構成されたチルト螺子軸62に螺合する雌螺子部51と、その軸に直交するように形成され上記のピボット軸P4として機能するピボット軸部52を有し、平面視十字形状に形成されている。ナット部材50はピボット軸部52を含み鉄材で形成されているが、雌螺子部51は合成樹脂によってインサート成形されている。尚、ナット部材50全体を合成樹脂によって形成することとしてもよい。そして、ナット部材50の雌螺子部51とチルト螺子軸62との間の螺合に起因するガタを防止するため、図1及び図3に示すように、磁石部材70が、チルト螺子軸62に対して磁力を付与し得る位置でナット部材50に保持されている。   As shown in FIGS. 1 and 2, the nut member 50 according to an embodiment of the present invention has a female screw portion 51 that is screwed into a tilt screw shaft 62 formed of a trapezoidal screw, and is orthogonal to the axis. It has a pivot shaft portion 52 that is formed and functions as the pivot shaft P4, and is formed in a cross shape in plan view. The nut member 50 includes a pivot shaft portion 52 and is formed of an iron material. The female screw portion 51 is insert-molded with a synthetic resin. The entire nut member 50 may be formed of synthetic resin. In order to prevent rattling caused by the screwing between the female screw portion 51 of the nut member 50 and the tilt screw shaft 62, the magnet member 70 is attached to the tilt screw shaft 62 as shown in FIGS. On the other hand, the nut member 50 is held at a position where a magnetic force can be applied.

本実施形態のナット部材50は、図1及び図3に示すように、雌螺子部51に連通する開口部53を有し、この開口部53内に磁石部材70を収容した状態で蓋部材54が開口部53に固定されるように構成されている。具体的には、開口部53の内周面に雌螺子が形成されると共に、蓋部材54の外周面に雄螺子が形成されており、蓋部材54が開口部53に螺合されるように構成されている。即ち、図3に示すように組付けられたときに、磁石部材70が発生する磁力(吸引力)によって、チルト螺子軸62が雌螺子部51内の側面の一方側に適切な荷重で付勢されるように構成されているので、チルト螺子軸62とナット部材50との間のガタを適切に防止することができる。   As shown in FIGS. 1 and 3, the nut member 50 of the present embodiment has an opening 53 that communicates with the female screw portion 51, and the lid member 54 with the magnet member 70 accommodated in the opening 53. Is fixed to the opening 53. Specifically, a female screw is formed on the inner peripheral surface of the opening 53 and a male screw is formed on the outer peripheral surface of the lid member 54, so that the lid member 54 is screwed into the opening 53. It is configured. That is, when assembled as shown in FIG. 3, the tilt screw shaft 62 is biased with an appropriate load on one side of the side surface in the female screw portion 51 by the magnetic force (attraction force) generated by the magnet member 70. Therefore, the play between the tilt screw shaft 62 and the nut member 50 can be appropriately prevented.

而して、上記のように磁石部材70をナット部材50に装着した後、チルト螺子軸62をナット部材50の雌螺子部51内の螺子溝に螺合させ、チルト螺子軸62を回転させながら雌螺子部51内に挿入すれば、チルト螺子軸62は磁石部材70の磁力によって雌螺子部51内の側面の一方側に付勢された状態で、ガタを生ずることなく円滑に雌螺子部51内を移動する。磁石部材70のナット部材50への装着に関しては、開口部53内に磁石部材70を収容した状態で蓋部材54を開口部53に螺合するだけでよく、従前の組付作業や調整は不要であるので、組付工数やコストを低減することができる。   Thus, after the magnet member 70 is mounted on the nut member 50 as described above, the tilt screw shaft 62 is screwed into the screw groove in the female screw portion 51 of the nut member 50 and the tilt screw shaft 62 is rotated. When inserted into the female screw portion 51, the tilt screw shaft 62 is urged to one side of the side surface in the female screw portion 51 by the magnetic force of the magnet member 70, and the female screw portion 51 is smoothly produced without causing play. Move in. As for the mounting of the magnet member 70 on the nut member 50, it is only necessary to screw the lid member 54 into the opening 53 in a state where the magnet member 70 is accommodated in the opening 53, and no previous assembly work or adjustment is required. Therefore, assembly man-hours and costs can be reduced.

図4及び図5は本発明の他の実施形態に係るナット部材50及び磁石部材70(前述の実施形態の磁石部材と大きさ等は異なるが同じ符合で表す)を示すもので、ナット部材50のピボット軸部52内に磁石部材70を収容した状態でピボット軸部52を回転可能に支持するピボット螺子56が設けられている。このピボット螺子56はリンク部材42の脚部42bに螺着されるように構成され、ピボット螺子56とピボット軸部52との間には樹脂ブッシュ57が介装されている。本実施形態の磁石部材70は、例えば接着剤によってピボット螺子56の先端面に接合され、この状態でピボット螺子56が樹脂ブッシュ57を介してピボット軸部52内に嵌合される。   4 and 5 show a nut member 50 and a magnet member 70 according to another embodiment of the present invention (represented by the same reference numerals with different sizes and the like from the magnet member of the above-described embodiment). A pivot screw 56 is provided for rotatably supporting the pivot shaft portion 52 in a state where the magnet member 70 is accommodated in the pivot shaft portion 52. The pivot screw 56 is configured to be screwed to the leg portion 42 b of the link member 42, and a resin bush 57 is interposed between the pivot screw 56 and the pivot shaft portion 52. The magnet member 70 of the present embodiment is joined to the distal end surface of the pivot screw 56 by, for example, an adhesive, and the pivot screw 56 is fitted into the pivot shaft portion 52 via the resin bush 57 in this state.

而して、ピボット軸部52内に磁石部材70を容易に収容し、確実に保持することができ、磁石部材70の磁力によってチルト螺子軸62がピボット軸部52内の側面の一方側に付勢された状態となるので、チルト螺子軸62とナット部材50との間のガタを確実に防止することができる。特に、磁石部材70は例えば接着剤によってピボット螺子56の先端面に接合するだけでよく、従前の組付作業や調整は不要であるので、組付工数やコストを低減することができる。   Thus, the magnet member 70 can be easily accommodated and securely held in the pivot shaft portion 52, and the tilt screw shaft 62 is attached to one side surface of the pivot shaft portion 52 by the magnetic force of the magnet member 70. Since the biased state is obtained, it is possible to reliably prevent the play between the tilt screw shaft 62 and the nut member 50. In particular, the magnet member 70 only needs to be joined to the distal end surface of the pivot screw 56 with an adhesive, for example, and no previous assembling work or adjustment is required, so that the number of assembling steps and costs can be reduced.

尚、図4及び図5に示す実施形態において、磁石部材70を一対用意し、極性の異なる面が対向するように配置し、両磁石部材70の吸引力及び反発力によって、チルト螺子軸62をピボット軸部52内の側面の一方側に付勢するように構成することとしてもよい。   In the embodiment shown in FIGS. 4 and 5, a pair of magnet members 70 are prepared, arranged so that the surfaces having different polarities face each other, and the tilt screw shaft 62 is moved by the attractive force and the repulsive force of both magnet members 70. The pivot shaft 52 may be configured to be biased to one side of the side surface.

1 ステアリングシャフト
3 チルト機構
4 リンク機構
5 駆動機構
10 メインハウジング
20 可動コラム部材
30 固定ブラケット
50 ナット部材
51 雌螺子部
52 ピボット軸部
60 電動モータ
62 チルト螺子軸
70 磁石部材
DESCRIPTION OF SYMBOLS 1 Steering shaft 3 Tilt mechanism 4 Link mechanism 5 Drive mechanism 10 Main housing 20 Movable column member 30 Fixed bracket 50 Nut member 51 Female screw part 52 Pivot shaft part 60 Electric motor
62 Tilt screw shaft 70 Magnet member

Claims (5)

車体に対しステアリングシャフトを揺動可能に支持するメインハウジングと、当該車体に固定する固定ブラケットとを連結し、前記ステアリングシャフトを所望の傾斜角度に調整する電動チルト機構を備えた車両のステアリング装置において、前記電動チルト機構が、前記メインハウジングに揺動可能に支持される電動モータと、前記メインハウジングに揺動可能に支持され、前記電動モータに回転駆動されるチルト螺子軸と、該チルト螺子軸に螺合する雌螺子部を有し、当該チルト螺子軸の回転駆動に応じて軸方向移動するナット部材と、該ナット部材に揺動可能に支持されると共に、前記メインハウジング及び前記固定ブラケットに対し揺動可能に支持されるリンク機構と、前記チルト螺子軸に対して磁力を付与し得る位置で前記ナット部材に保持される磁石部材とを備えたことを特徴とする車両のステアリング装置。   In a steering apparatus for a vehicle provided with an electric tilt mechanism that connects a main housing that swingably supports a steering shaft to a vehicle body and a fixed bracket that is fixed to the vehicle body, and adjusts the steering shaft to a desired inclination angle. The electric tilt mechanism is swingably supported by the main housing; the tilt screw shaft is swingably supported by the main housing and is rotationally driven by the electric motor; and the tilt screw shaft And a nut member that is axially moved in accordance with the rotational drive of the tilt screw shaft, and is supported by the nut member in a swingable manner, and is attached to the main housing and the fixed bracket. A link mechanism supported so as to be capable of swinging, and the nut at a position where a magnetic force can be applied to the tilt screw shaft. Steering apparatus for a vehicle characterized by comprising a magnet member which is held in the wood. 前記ナット部材は、前記雌螺子部に連通する開口部を有し、該開口部内に前記磁石部材を収容した状態で当該開口部に固定される蓋部材を具備す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。   2. The nut member includes an opening communicating with the female screw portion, and a lid member fixed to the opening in a state where the magnet member is accommodated in the opening. The vehicle steering apparatus as described. 前記ナット部材の開口部の内周面に雌螺子が形成されると共に、前記蓋部材の外周面に雄螺子が形成され、前記蓋部材が前記開口部に螺合されることを特徴とする請求項2記載の車両のステアリング装置。   The female screw is formed on the inner peripheral surface of the opening of the nut member, the male screw is formed on the outer peripheral surface of the lid member, and the lid member is screwed into the opening. Item 3. The vehicle steering device according to Item 2. 前記ナット部材は、前記雌螺子部の軸に直交するように形成され前記リンク機構に揺動可能に支持されるピボット軸部を有し、該ピボット軸部内に前記磁石部材を収容した状態で当該ピボット軸部を回転可能に支持するピボット螺子を具備す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 nut member has a pivot shaft portion that is formed so as to be orthogonal to the axis of the female screw portion and is swingably supported by the link mechanism, and the magnet member is accommodated in the pivot shaft portion. The vehicle steering apparatus according to claim 1, further comprising a pivot screw that rotatably supports the pivot shaft portion. 前記磁石部材は、前記ピボット螺子の先端面に接合されていることを特徴とする請求項4記載の車両のステアリング装置。   5. The vehicle steering apparatus according to claim 4, wherein the magnet member is joined to a front end surface of the pivot screw.
JP2014059306A 2014-03-21 2014-03-21 Vehicle steering device Pending JP2015182521A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114126951A (en) * 2019-06-21 2022-03-01 德国日本电产电机与驱动器有限公司 Height adjustment device for a steering column of a motor vehicle with a spring element
EP3967368A1 (en) * 2020-09-09 2022-03-16 Jeisys Medical Inc. Ultrasonic medical cartridge and ultrasonic medical device including the same
US20230347968A1 (en) * 2020-06-16 2023-11-02 Fuji Kiko Co., Ltd. Steering column device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114126951A (en) * 2019-06-21 2022-03-01 德国日本电产电机与驱动器有限公司 Height adjustment device for a steering column of a motor vehicle with a spring element
US20230347968A1 (en) * 2020-06-16 2023-11-02 Fuji Kiko Co., Ltd. Steering column device
US12005954B2 (en) * 2020-06-16 2024-06-11 Jtekt Column Systems Corporation Steering column device
EP3967368A1 (en) * 2020-09-09 2022-03-16 Jeisys Medical Inc. Ultrasonic medical cartridge and ultrasonic medical device including the same

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