JP2010188886A5

JP2010188886A5 -

Info

Publication number: JP2010188886A5
Application number: JP2009035750A
Authority: JP
Filing date: 2009-02-18
Publication date: 2012-04-05

Description

上記目的を達成するため、本発明は、操舵力を伝達する回転軸（２０，６３；４０Ａ，６３Ａ；２０Ｂ，６３Ｂ；６３Ｃ）の回転角を検出する回転角センサ（５０；５０Ｂ；５０Ｃ）と、操舵力を発生する電動モータ（１８）と、上記電動モータの動力を転舵機構（４）に伝達する伝達機構（１９）と、を備え、上記回転角センサは、上記回転軸の軸方向（Ｘ１）の端面（２０ｃ；４０ｃ；２０ｃＢ；４０ｃＣ）に同行回転可能に保持された被検出部（５１；５１Ｂ；５１Ｃ）と、上記被検出部と上記軸方向に対向し固定部材（５５；６２ｂ）に保持された検出部（５２）と、を含み、上記回転軸は、上記伝達機構のウォーム軸（２０；２０Ｂ）であることを特徴とする車両用操舵装置（１）を提供する（請求項１）。 To achieve the above object, the present invention is the rotation shaft for transmitting a steering force (20,63; 40A, 63A; 20B , 63B; 63C) rotation angle sensor for detecting a rotation angle of (50; 50B; 50C) and An electric motor (18) for generating a steering force, and a transmission mechanism (19) for transmitting the power of the electric motor to the steering mechanism (4), wherein the rotation angle sensor is an axial direction of the rotation shaft. (X1) end face (20c; 40c; 20cB; 40cC) and a detected part (51; 51B; 51C) held rotatably along with the detected part; detector held in 62b) and (52), only free and the rotary shaft, the worm shaft of the transmission mechanism (20; to provide a vehicle steering system (1), which is a 20B) (Claim 1).

本発明によれば、回転角センサの検出部と被検出部とを回転軸の軸方向に対向配置している。これにより、検出部と被検出部とを回転軸の径方向に並べずに済むので、回転軸の径方向に関して、回転角センサを小型にできる。その結果、車両用操舵装置を小型化できる。 According to the present invention, the detection part and the detected part of the rotation angle sensor are arranged opposite to each other in the axial direction of the rotation axis. Thereby, since it is not necessary to arrange | position a detection part and a to-be-detected part to the radial direction of a rotating shaft, a rotation angle sensor can be made small regarding the radial direction of a rotating shaft. As a result, the vehicle steering device can be reduced in size .

また、ロータやステータ等の種々の部品が配置されている電動モータから離れた箇所に回転角センサを配置できる。これにより、回転角センサの被検出部と検出部の配置の自由度を高くできる。また、電動モータの熱の影響を受け難くでき、その結果、回転角センサの耐久性をより向上できる。 Moreover, it can be arranged a rotational angle sensor at a location remote from the electric motor in which various components such as Russia over data and the stator are arranged. Thereby, the freedom degree of arrangement | positioning of the to-be-detected part and detection part of a rotation angle sensor can be made high. Further, it is difficult to be affected by the heat of the electric motor, and as a result, the durability of the rotation angle sensor can be further improved.

また、本発明において、上記伝達機構のウォーム軸を収容するハウジング（２３）を備え、上記ハウジングは、上記ウォーム軸の端面とは上記軸方向に対向する貫通口（５６）と、この貫通口を塞ぐ蓋（５５）と、を含み、上記被検出部は、上記ウォーム軸の上記端面に保持され、上記蓋は、上記固定部材として上記検出部を保持している場合がある（請求項２）。この場合、検出部を保持した蓋を貫通口に嵌め合わせることにより、検出部をハウジングに容易に組み付けることができる。
また、本発明において、上記回転軸は、上記電動モータのモータ軸および上記伝達機構のウォーム軸を単一の材料で一体に形成した一体軸（６３；６３Ａ；６３Ｂ；６３Ｃ）であり、上記被検出部は、上記一体軸の上記ウォーム軸側の端面（２０ｃ；２０ｃＢ）に保持される場合がある（請求項３）。この場合、モータ軸とウォーム軸とを含む一体軸に被検出部を配置していることにより、１つの回転角センサで、モータ軸の回転角とウォーム軸の回転角の双方を精度よく検出できる。 In the present invention, a housing (23) for accommodating the worm shaft of the transmission mechanism is provided, and the housing includes a through hole (56) facing the end surface of the worm shaft in the axial direction, and the through hole. A lid (55) for closing, wherein the detected portion is held on the end face of the worm shaft, and the lid may hold the detecting portion as the fixing member (claim 2). . In this case, the detection unit can be easily assembled to the housing by fitting the lid holding the detection unit to the through hole.
Further, in the present invention, the upper Symbol rotation axis, the electric motor of the motor shaft and integral shaft formed integrally with the worm shaft of the transmission mechanism of a single material is (63; 63A;; 63B 63C ), the The detected portion may be held on the end surface (20c; 20cB ) on the worm shaft side of the integral shaft (claim 3 ). In this case, since the detected portion is arranged on the integral shaft including the motor shaft and the worm shaft, both the rotation angle of the motor shaft and the rotation angle of the worm shaft can be accurately detected with one rotation angle sensor. .

Claims

A rotation angle sensor for detecting the rotation angle of the rotation shaft for transmitting the steering force ;
An electric motor that generates steering force;
A transmission mechanism for transmitting the power of the electric motor to the steering mechanism ,
The rotation angle sensor includes a detected portion that is rotatably supported on an axial end surface of the rotation shaft, and a detection portion that is opposed to the detected portion in the axial direction and is held by a fixed member. See
The vehicle steering apparatus , wherein the rotation shaft is a worm shaft of the transmission mechanism .

The housing according to claim 1 , further comprising a housing for accommodating the worm shaft of the transmission mechanism.
The housing includes a through hole facing the end surface of the worm shaft in the axial direction, and a lid for closing the through hole,
The detected portion is held on the end surface of the worm shaft,
The vehicular steering apparatus, wherein the lid holds the detection unit as the fixing member.

According to claim 1 or 2, upper Symbol rotary shaft is an integral shaft formed integrally with the worm shaft of the motor shaft and the transmission mechanism of the electric motor of a single material,
The vehicle steering apparatus, wherein the detected portion is held on an end face of the integral shaft on the worm shaft side.