JP3110612B2 - Steering torque sensor - Google Patents
Steering torque sensorInfo
- Publication number
- JP3110612B2 JP3110612B2 JP06130369A JP13036994A JP3110612B2 JP 3110612 B2 JP3110612 B2 JP 3110612B2 JP 06130369 A JP06130369 A JP 06130369A JP 13036994 A JP13036994 A JP 13036994A JP 3110612 B2 JP3110612 B2 JP 3110612B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- steering torque
- torque sensor
- input
- output shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Power Steering Mechanism (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ステアリングトルク検
出用センサのトルク検出変換機構部を構成するコアの材
質を改良した操舵トルクセンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering torque sensor in which the material of a core constituting a torque detecting conversion mechanism of a steering torque detecting sensor is improved.
【０００２】[0002]
【従来の技術】従来、図２乃至図４に示すように、パワ
ーステアリング装置に用いられている操舵トルクセンサ
１００においては、入力軸（インプットシャフト）１０
１と出力軸（アウトプットシャフト）１０２が内部でト
ーションバー１０３により連結され、ハウジング１０４
に支持された２個の検出コイル１０５，１０６が入出力
軸１０１，１０２に係合している円筒状のコア１０７を
囲むように配設されている。2. Description of the Related Art Conventionally, as shown in FIGS. 2 to 4, in a steering torque sensor 100 used in a power steering apparatus, an input shaft (input shaft) 10 is used.
1 and an output shaft (output shaft) 102 are internally connected by a torsion bar 103, and a housing 104
Are provided so as to surround the cylindrical core 107 engaged with the input / output shafts 101 and 102.
【０００３】そこで、入力軸１０１に捩りトルクを与え
るとトーションバー１０３が弾性変形し、入力軸１０１
と出力軸１０２の間に回転方向の相対変位が生じる。ま
た、図４に示すように、各軸１０１，１０２の外周に配
設されているコア１０７は、出力軸１０２の縦ガイド溝
１０８とコア１０７内側の凸状の縦ガイドキー１０９が
係合することにより、軸方向にのみ移動出来るように形
成されている。更に、コア１０７のスパイラル溝１１０
に入力軸１０１に圧入されたスライダピン１１１が係合
している。When a torsional torque is applied to the input shaft 101, the torsion bar 103 is elastically deformed, and the input shaft 101
And the output shaft 102 generates a relative displacement in the rotational direction. As shown in FIG. 4, the core 107 provided on the outer periphery of each of the shafts 101 and 102 engages with the vertical guide groove 108 of the output shaft 102 and the convex vertical guide key 109 inside the core 107. Thereby, it is formed so that it can move only in the axial direction. Furthermore, the spiral groove 110 of the core 107
Is engaged with a slider pin 111 press-fitted into the input shaft 101.
【０００４】このような構造により、軸１０１，１０２
間の回転方向の相対変位は、コア１０７の軸方向の変位
に変換される。このコア１０７の変位によって検出コイ
ル１０５，１０６の周辺に磁気的変化を生じ、上下に配
置した検出コイル１０５，１０６のインダクタンスが変
化する。このインダクタンスの変化を利用してトルク検
出を行っている。With such a structure, the shafts 101, 102
The relative displacement in the rotation direction between them is converted into the displacement of the core 107 in the axial direction. The displacement of the core 107 causes a magnetic change around the detection coils 105 and 106, and changes the inductance of the detection coils 105 and 106 arranged vertically. Torque detection is performed using the change in inductance.
【０００５】[0005]
【発明が解決しようとする課題】従来の技術において
は、図２乃至図４に示すように、コア１０７自体に回転
方向の変位を軸方向の変位に変換するための変換機構を
形成しているため、複雑な切削加工が必要となると共
に、その際に生じる磁化による磁気ばらつきの低減と摺
動部分の耐磨耗性向上のための熱処理が必要となり作業
が煩雑でコスト高になるという問題点を有していた。ま
た、磁気特性の優れた材料は一般に軟らかいため、磁気
特性と耐磨耗性を共に満足する材質を選定するのは困難
であるという問題点を有していた。In the prior art, as shown in FIGS. 2 to 4, a conversion mechanism for converting a rotational displacement into an axial displacement is formed in the core 107 itself. Therefore, a complicated cutting process is required, and heat treatment for reducing magnetic variation due to magnetization and improving abrasion resistance of the sliding portion is required, which makes the operation complicated and costly. Had. In addition, since a material having excellent magnetic properties is generally soft, it is difficult to select a material that satisfies both magnetic properties and abrasion resistance.
【０００６】本発明は、従来の技術が有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、磁気特性と耐磨耗性を共に満足するコアを有す
る操舵トルクセンサを提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a steering torque sensor having a core satisfying both magnetic characteristics and wear resistance. It is intended to provide.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決すべく本
発明は、入力軸と出力軸間をトーションバーで連結する
と共に、前記入力軸及び出力軸に係合するコアを設け、
前記入出力軸間にトルクが作用すると前記コアが変位
し、前記コアの変位を検出コイルにて電気的に検出する
ようにした操舵トルクセンサにおいて、前記コアを前記
検出コイルに磁気的変化を与えるアルミニウム製の本体
部と、この本体部と一体にモールドして形成され前記入
出力軸に係合する樹脂製の変換機構部とにより構成した
ものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a core that connects an input shaft and an output shaft with a torsion bar and engages with the input shaft and the output shaft.
When a torque acts between the input and output shafts, the core is displaced, and in a steering torque sensor in which the displacement of the core is electrically detected by a detection coil, the core applies a magnetic change to the detection coil. It comprises a main body made of aluminum, and a conversion mechanism made of resin and formed integrally with the main body and molded to engage with the input / output shaft.
【０００８】[0008]
【作用】検出コイルに磁気的変化を与えるアルミニウム
製の本体部によって検出コイルのインダクタンスを変化
させ、樹脂製の変換機構部によって入出力軸と円滑に係
合される。[Action] Aluminum that gives a magnetic change to the detection coil
The inductance of the detection coil is changed by the main body made of plastic, and the input / output shaft is smoothly engaged by the conversion mechanism made of resin.
【０００９】[0009]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。ここで、図１は本発明に係る操舵トルクセン
サの縦断面図である。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a longitudinal sectional view of the steering torque sensor according to the present invention.
【００１０】図１に示すように、操舵トルクセンサ１
は、２個の検出コイル２ａ，２ｂと、検出コイル２ａ，
２ｂに磁気的変化を与えるコア３と、検出コイル２ａ，
２ｂを支持するハウジング４などを備えている。As shown in FIG. 1, a steering torque sensor 1
Are two detection coils 2a and 2b, and two detection coils 2a and 2b.
A core 3 for giving a magnetic change to the detection coil 2a;
2b is provided.
【００１１】コア３は、検出コイル２ａ，２ｂに磁気的
変化を与えるアルミ（Ａl材）製の本体部３ａと、入出
力軸６，７に係合する摺動用樹脂製の変換機構部３ｂか
ら成り、アルミ製本体部３ａと摺動用樹脂製の変換機構
部３ｂは摺動用樹脂で一体にモールドして形成されてい
る。なお、本体部３ａは強磁性金属材料で形成してもよ
い。The core 3 is composed of a main body 3a made of aluminum (Al material) that gives a magnetic change to the detection coils 2a and 2b, and a conversion mechanism 3b made of a sliding resin engaged with the input / output shafts 6 and 7. The aluminum main body 3a and the conversion mechanism 3b made of a sliding resin are integrally molded with a sliding resin. The main body 3a may be formed of a ferromagnetic metal material.
【００１２】また、操舵トルクセンサ１においては、入
力軸６と出力軸７が内部においてトーションバー８で連
結されている。コア３は、図３及び図４で示したのと同
様に、出力軸７の縦ガイド溝と変換機構部３ｂ内側の凸
状の縦ガイドキーが係合することにより、軸６，７方向
にのみ移動出来るように形成されている。更に、変換機
構部３ｂのスパイラル溝９に入力軸６に圧入されたスラ
イダピンが係合している。Further, in the steering torque sensor 1, the input shaft 6 and the output shaft 7 are connected by a torsion bar 8 inside. The core 3 is moved in the directions of the shafts 6 and 7 by engaging the vertical guide groove of the output shaft 7 with the convex vertical guide key inside the conversion mechanism 3b in the same manner as shown in FIGS. It is formed so that it can move only. Further, a slider pin pressed into the input shaft 6 is engaged with the spiral groove 9 of the conversion mechanism 3b.
【００１３】ハウジング４は、アルミ材（Ａl材）で形
成され、検出コイル２ａ，２ｂを巻いたコイルボビン１
１をヨーク１２を介して支持すると共に、コア３と入出
力軸６，７を囲むように配設されいる。なお、１３は入
力軸６の回転速度をギア１４ａ，歯付ベルト１４ｂ，ギ
ア１４ｃを介して検出するタコジェネレータ、１５は入
力軸６とハウジング３との間に配設されたベアリング、
１６は出力軸７とハウジング３との間に配設されたベア
リング、１７はダストシール、１８はかしめリングであ
る。The housing 4 is made of an aluminum material (Al material) and has a coil bobbin 1 around which detection coils 2a and 2b are wound.
1 is supported via a yoke 12 and is disposed so as to surround the core 3 and the input / output shafts 6 and 7. Reference numeral 13 denotes a tacho generator for detecting the rotational speed of the input shaft 6 via the gear 14a, the toothed belt 14b, and the gear 14c. Reference numeral 15 denotes a bearing disposed between the input shaft 6 and the housing 3.
Reference numeral 16 denotes a bearing provided between the output shaft 7 and the housing 3, reference numeral 17 denotes a dust seal, and reference numeral 18 denotes a caulking ring.
【００１４】以上のように構成した操舵トルクセンサ１
の作用について説明する。入力軸６に捩りトルクを与え
るとトーションバー８が弾性変形し、入力軸６と出力軸
７の間に回転方向の相対変位が生じる。The steering torque sensor 1 configured as described above
The operation of will be described. When a torsional torque is applied to the input shaft 6, the torsion bar 8 is elastically deformed, and a relative displacement in the rotation direction occurs between the input shaft 6 and the output shaft 7.
【００１５】すると、各軸６，７の外周に嵌装されてい
るコア３の変換機構部３ｂは、出力軸７の縦ガイド溝と
変換機構部３ｂ内側の凸状の縦ガイドキーが係合状態に
あることと、変換機構部３ｂのスパイラル溝９に入力軸
６に圧入されたスライダピンが係合状態にあることによ
って、軸６，７方向に移動する。Then, the conversion mechanism 3b of the core 3 fitted on the outer periphery of each of the shafts 6 and 7 is engaged with the vertical guide groove of the output shaft 7 and the convex vertical guide key inside the conversion mechanism 3b. When the slider pin is pressed into the input shaft 6 in the spiral groove 9 of the conversion mechanism 3b in the engaged state, the slider pin moves in the directions of the shafts 6 and 7.
【００１６】このようなコア３の変位が検出コイル２
ａ，２ｂの周辺に磁気的変化を招き、検出コイル２ａ，
２ｂのインダクタンスは、一方が大きくなり、他方が小
さくなるように夫々変化する。The displacement of the core 3 is detected by the detection coil 2
A magnetic change is caused around the detection coils 2a, 2b.
The inductance of 2b changes so that one becomes large and the other becomes small.
【００１７】このような検出コイル２ａ，２ｂのインダ
クタンスを検出回路（不図示）によりトルクとして検出
することが出来る。The inductance of the detection coils 2a and 2b can be detected as torque by a detection circuit (not shown).
【００１８】[0018]
【発明の効果】以上説明したように本発明によれば、コ
アを検出コイルに磁気的変化を与えるアルミニウム製の
本体部と、この本体部と一体にモールドして形成され入
出力軸に係合する樹脂製の変換機構部に分けて構成した
ので、機能毎の設計が可能となり、変換機構部に左右さ
れることなく検出感度を向上することが出来るように、
アルミニウム製のコア本体部の形状などを最適に設定す
ることが可能となる。また、変換機構部を樹脂で形成し
たので、コスト低減が図れると共に、加工による磁気ば
らつきを無視することが出来、加工時の磁気ばらつきを
抑える熱処理が不要になる。As described above, according to the present invention, an aluminum main body for giving a magnetic change to the detection coil, and an input / output unit formed integrally with the main body are molded. Since it is divided into a resin conversion mechanism that engages with the shaft, it is possible to design each function, and to improve the detection sensitivity without being affected by the conversion mechanism.
It is possible to set the aluminum-made core body portion shape optimally. In addition, since the conversion mechanism is formed of resin, the cost can be reduced, and magnetic variations due to processing can be neglected, so that heat treatment for suppressing magnetic variations during processing is not required.
【図１】本発明に係る操舵トルクセンサの縦断面図FIG. 1 is a longitudinal sectional view of a steering torque sensor according to the present invention.
【図２】従来の操舵トルクセンサの縦断面図FIG. 2 is a longitudinal sectional view of a conventional steering torque sensor.
【図３】図２の一部断面斜視図FIG. 3 is a partial cross-sectional perspective view of FIG. 2;
【図４】図３の横断面図FIG. 4 is a cross-sectional view of FIG.
１…操舵トルクセンサ、２ａ，２ｂ…検出コイル、３…
コア、３ａ…コア本体部、３ｂ…変換機構部、４…ハウ
ジング、６…入力軸、７…出力軸、８…トーションバ
ー。DESCRIPTION OF SYMBOLS 1 ... Steering torque sensor, 2a, 2b ... Detection coil, 3 ...
Core, 3a: Core body, 3b: Conversion mechanism, 4: Housing, 6: Input shaft, 7: Output shaft, 8: Torsion bar.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−244972（ＪＰ，Ａ) 特開 平２−232537（ＪＰ，Ａ) 特開 平３−285130（ＪＰ，Ａ) 実開 平３−33344（ＪＰ，Ｕ) 米国特許4800764（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01L 3/10 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-24972 (JP, A) JP-A-2-22537 (JP, A) JP-A-3-285130 (JP, A) 33344 (JP, U) US Patent 4800764 (US, A) (58) Fields investigated (Int. Cl. 7 , DB name) G01L 3/10
Claims (1)
結すると共に、前記入力軸及び出力軸に係合するコアを
設け、前記入出力軸間にトルクが作用すると前記コアが
変位し、前記コアの変位を検出コイルにて電気的に検出
するようにした操舵トルクセンサにおいて、前記コアを
前記検出コイルに磁気的変化を与えるアルミニウム製の
本体部と、この本体部と一体にモールドして形成され前
記入出力軸に係合する樹脂製の変換機構部とにより構成
したことを特徴とする操舵トルクセンサ。1. An input shaft and an output shaft are connected by a torsion bar, and a core engaged with the input shaft and the output shaft is provided. When a torque acts between the input and output shafts, the core is displaced, In a steering torque sensor in which a displacement of a core is electrically detected by a detection coil, an aluminum main body that magnetically changes the core with the detection coil, and an integral body with the main body are provided. A steering torque sensor comprising a resin-made conversion mechanism formed by molding and engaging with the input / output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06130369A JP3110612B2 (en) | 1994-06-13 | 1994-06-13 | Steering torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06130369A JP3110612B2 (en) | 1994-06-13 | 1994-06-13 | Steering torque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07333082A JPH07333082A (en) | 1995-12-22 |
| JP3110612B2 true JP3110612B2 (en) | 2000-11-20 |
Family
ID=15032734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06130369A Expired - Lifetime JP3110612B2 (en) | 1994-06-13 | 1994-06-13 | Steering torque sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3110612B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002257648A (en) * | 2001-02-28 | 2002-09-11 | Honda Motor Co Ltd | Torque detecting device and electric power steering device using the same |
| JP5050385B2 (en) * | 2006-03-31 | 2012-10-17 | 株式会社ジェイテクト | Torque detection device |
| JP2007271565A (en) * | 2006-03-31 | 2007-10-18 | Jtekt Corp | Torque detector |
| JP6414692B2 (en) * | 2015-03-20 | 2018-10-31 | 株式会社ジェイテクト | Torque detection device |
-
1994
- 1994-06-13 JP JP06130369A patent/JP3110612B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07333082A (en) | 1995-12-22 |
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