JPH10239183A - Magnetostrictive detector for torque sensor - Google Patents

Magnetostrictive detector for torque sensor

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Publication number
JPH10239183A
JPH10239183A JP4514397A JP4514397A JPH10239183A JP H10239183 A JPH10239183 A JP H10239183A JP 4514397 A JP4514397 A JP 4514397A JP 4514397 A JP4514397 A JP 4514397A JP H10239183 A JPH10239183 A JP H10239183A
Authority
JP
Japan
Prior art keywords
main body
rotating shaft
body member
torque
magnetostrictive detector
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.)
Pending
Application number
JP4514397A
Other languages
Japanese (ja)
Inventor
Makoto Mihoya
誠 三保家
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP4514397A priority Critical patent/JPH10239183A/en
Publication of JPH10239183A publication Critical patent/JPH10239183A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a magnetostrictive detector for torque sensor having high rigidity that can use an inexpensive rotary shaft. SOLUTION: The magnetostrictive detector is disposed between two rotary shafts being applied with torque and contains a body member 5 having elastic modulus lower than that of the rotary shaft. The body member 5 is made of a magnetic material or a magnetic film 7 is formed on the surface thereof and held between the rotary shafts. Strain is generated in the body member 5 by a torque being transmitted from the rotary shafts and the torque of the rotary shaft is found by measuring variation in the permeability of the body member 5 or the magnetic film 7 on the surface thereof.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、回転軸に発生する
トルクを検出するトルクセンサ用磁歪検出体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetostrictive detector for a torque sensor for detecting a torque generated on a rotating shaft.

【０００２】[0002]

【従来の技術】上記電動パワーステアリングは、自動車
の操舵輪を操作する力を補助するものであり、これは操
舵輪に加えられたトルクを検出し、その検出トルクに応
じて操舵機構に設けた電動機を回転させる構成となって
いる。2. Description of the Related Art The above-mentioned electric power steering assists a force for operating a steered wheel of an automobile, and detects a torque applied to the steered wheel, and is provided in a steering mechanism according to the detected torque. The motor is configured to rotate.

【０００３】この技術として、例えば、特開平２−１０
２４２８号に開示されたものがある。これは、回転軸に
発生するトルクを検出するため、入力側と出力側の軸の
捻れを、入力側と出力側に固定した軟鉄等の軟磁性材料
で形成された歯部を有する円筒の該歯部の重なり量変化
としてとらえたものである。この重なり量が変化するこ
とで発生する透磁率の変化を周囲に設けたコイルのイン
ピーダンス変化量として測定し、非接触で回転軸のトル
クを求める。As this technique, for example, Japanese Patent Laid-Open No. 2-10
No. 2428. In order to detect the torque generated on the rotating shaft, the torsion of the shaft on the input side and the output side is reduced by adjusting the torsion of the shaft having teeth formed of a soft magnetic material such as soft iron fixed on the input side and the output side. This is regarded as a change in the overlapping amount of the teeth. The change in the magnetic permeability caused by the change in the amount of overlap is measured as the impedance change amount of the coil provided around, and the torque of the rotating shaft is obtained in a non-contact manner.

【０００４】上記技術においては、検出感度を高めるた
め、歯部を有する円筒の入力側と出力側の重なり量を十
分変化させる必要がある。つまり、回転軸の径を細くし
て十分な軸の捻れ、具体的には１０°程度またはそれ以
上の捻れを発生させる必要がある。In the above technique, in order to increase the detection sensitivity, it is necessary to sufficiently change the amount of overlap between the input side and the output side of the cylinder having the teeth. In other words, it is necessary to reduce the diameter of the rotating shaft to generate sufficient torsion of the shaft, specifically, about 10 ° or more.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、上記従
来のトルクセンサ用磁歪検出体においては、回転軸の径
が細いので剛性が不足し、操舵輪の操作感において剛性
感に欠けたり、回転軸が破損したりするおそれがあっ
た。また、過大トルクに対する回転軸の破損を防止する
ためには複雑な安全機構を設けなければならず、コスト
面で不利であった。However, in the above-described conventional magnetostrictive detector for a torque sensor, the diameter of the rotating shaft is small, so that the rigidity is insufficient. There was a risk of damage. Further, in order to prevent the rotation shaft from being damaged by excessive torque, a complicated safety mechanism must be provided, which is disadvantageous in cost.

【０００６】本発明は、上記事情に鑑みてなされたもの
で、剛性が高く、安価な回転軸を使用することができる
トルクセンサ用磁歪検出体を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a magnetostrictive detector for a torque sensor which has high rigidity and can use an inexpensive rotating shaft.

【０００７】[0007]

【課題を解決するための手段】本発明は、上記目的を解
決するためになされたものであり、その要旨は、トルク
が加わる二つの回転軸の間に配設されて該回転軸よりも
弾性率が小さい本体部材を含み、該本体部材が磁性材料
で形成され、または、該本体部材の表面に磁性膜が形成
され、かつ、上記回転軸の間に挟持され、回転軸から伝
達されるトルクによって上記本体部材に歪を発生させ、
この本体部材または本体部材表面の磁性膜の透磁率の変
化を測定することにより、回転軸のトルクを求めるトル
クセンサ用磁歪検出体にある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned object, and the gist of the present invention is to dispose between two rotating shafts to which a torque is applied and to provide an elasticity more than the rotating shafts. A main body member formed of a magnetic material, or a magnetic film is formed on a surface of the main body member, and is sandwiched between the rotating shafts, and torque transmitted from the rotating shafts is included. Causes strain on the body member,
The magnetostrictive detector for a torque sensor determines the torque of the rotating shaft by measuring the change in the magnetic permeability of the main body member or the magnetic film on the surface of the main body member.

【０００８】[0008]

【発明の実施の形態】以下に図面を参照しながら、本発
明に係るトルクセンサ用磁歪検出体を詳細に説明する。第１の実施の形態 本実施の形態では、図１に示すような磁歪検出体の本体
部材を回転軸の中間部に介在させ、該回転軸から伝達さ
れるトルクによって上記磁歪検出体の本体部材に歪を発
生させ、この本体部材の表面に形成させた磁性膜の透磁
率の変化を測定することにより、回転軸のトルクを求め
る。以下に、この磁歪検出体の構造について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a magnetostrictive detector for a torque sensor according to the present invention will be described in detail with reference to the drawings. First Embodiment In the present embodiment, a main body member of a magnetostrictive detector as shown in FIG. 1 is interposed at an intermediate portion of a rotary shaft, and the main body member of the magnetostrictive detector is transmitted by a torque transmitted from the rotary shaft. The torque of the rotating shaft is determined by measuring the change in the magnetic permeability of the magnetic film formed on the surface of the main body member. Hereinafter, the structure of the magnetostrictive detector will be described.

【０００９】図１(a) は本発明に係る磁歪検出体の正面
図、図１(b) はその側面図である。この磁歪検出体１
は、図２〜図４に示すような構成部品によって構成され
ている。これらの図面においても、(a) は正面図、(b)
はその側面図である。磁歪検出体１の左右両側では、図
示しない構造により、回転軸連結体２，２が回転軸に連
結されている。該回転軸連結体２，２は、材質が、例え
ばＳ４５Ｃ等であり、円柱部３の側面から２本の脚部
４，４が立設した形状となっている。FIG. 1A is a front view of a magnetostrictive detector according to the present invention, and FIG. 1B is a side view thereof. This magnetostrictive detector 1
Is composed of components as shown in FIGS. Also in these drawings, (a) is a front view, (b)
Is a side view thereof. On both left and right sides of the magnetostrictive detector 1, the rotating shaft connectors 2 and 2 are connected to the rotating shaft by a structure (not shown). The rotating shaft coupling bodies 2 and 2 are made of, for example, S45C or the like, and have a shape in which two leg portions 4 and 4 stand upright from the side surface of the cylindrical portion 3.

【００１０】また、磁歪検出体１の中央部に配設された
本体５は、円柱体の側面に溝６が設けられた形状をして
おり、該溝６は径方向で互いに直交している。該本体５
の材質は、その両側の回転軸連結体２，２よりも弾性率
の小さいアルミニウムや銅などが好ましい。この本体５
の表面には、図３(a)(b)に示すように、例えば、Ｆｅ−
Ｃｏ−Ｓｉ−Ｂ系アモルファス磁性箔をポリイミド系接
着剤、エポキシ系接着剤などの有機接着剤による接着、
あるいは接合温度４５０℃以下の軟ろうを用いてろう接
を行う。ここで、温度を４５０℃以下と限定したのは、
４５０℃以上の温度では、アモルファス磁性材料の結晶
化が進行し、アモルファス状態でなくなるからである。
また、磁性膜７は、その他の慣用の手段、例えば、湿式
めっき法、スパッタリング法、溶射法によって形成する
こともできる。なお、この図面におけるハッチングは、
表面に形成された磁性膜であり、通常の断面を示すもの
ではない。The main body 5 disposed at the center of the magnetostrictive detector 1 has a shape in which a groove 6 is provided on a side surface of a cylindrical body, and the grooves 6 are orthogonal to each other in a radial direction. . The body 5
Is preferably aluminum, copper, or the like, which has a lower elastic modulus than the rotating shaft coupling bodies 2 on both sides thereof. This body 5
As shown in FIGS. 3A and 3B, for example, Fe-
Adhesion of Co-Si-B amorphous magnetic foil with organic adhesive such as polyimide adhesive, epoxy adhesive,
Alternatively, soldering is performed using a soft solder having a joining temperature of 450 ° C. or lower. Here, the temperature was limited to 450 ° C. or less because
At a temperature of 450 ° C. or higher, the crystallization of the amorphous magnetic material proceeds, and the amorphous magnetic material is no longer in an amorphous state.
Further, the magnetic film 7 can be formed by other conventional means, for example, a wet plating method, a sputtering method, or a thermal spraying method. The hatching in this drawing is
It is a magnetic film formed on the surface and does not show a normal cross section.

【００１１】磁歪検出体の組付方法を説明すると、ま
ず、２つの回転軸連結体２，２の脚部４を互いに直交し
た状態で対向させ、これらの間に本体５を配置する。次
に、左側の回転軸連結体２の脚部４を本体５の水平な溝
６に、右側の回転軸連結体２の脚部４を本体５の垂直な
溝６に嵌合させ、回転軸連結体２と本体５を接合させ
る。この接合方法としては、例えば、ろう接を行う。ろ
う接においては、接合温度４５０℃以上の硬ろうが望ま
しく、このため磁性膜７の形成に先立って回転軸連結体
２と本体５のろう接を行っておくべきである。ろう接以
外には、電子ビーム溶接、拡散接合などの方法によって
接合することもできる。次いで、第１の実施の形態に係
る磁歪検出体１による作用について説明する。まず、磁
歪検出体１に図１(b) に示すような時計方向のトルクＴ
1 がかかると、本体５のＢ部に圧縮力が加わり圧縮変形
が生じると同時に、回転軸連結体２と本体５が接合して
いるため、本体５のＡ部には引張力が加わり伸び変形が
生じる。一方、反時計方向のトルクＴ2 がかかると、本
体５のＡ部に圧縮力が加わり圧縮変形が生じ、Ｂ部には
引張力が加わり伸び変形が生じる。この変形により該本
体５の表面に形成された磁性膜７の透磁率が変化するた
め、該透磁率の変化を本体５の周囲に配置したコイル
（図示せず）によりインピーダンス変化として検出する
ことにより、回転軸に加えられたトルクを検出する。The method of assembling the magnetostrictive detector will be described. First, the legs 4 of the two rotary shaft connectors 2 and 2 are opposed to each other in a state of being orthogonal to each other, and the main body 5 is disposed between them. Next, the leg 4 of the left rotating shaft connector 2 is fitted into the horizontal groove 6 of the main body 5, and the leg 4 of the right rotating shaft connector 2 is fitted into the vertical groove 6 of the main body 5. The connector 2 and the main body 5 are joined. As this joining method, for example, brazing is performed. In the brazing, a hard brazing at a joining temperature of 450 ° C. or more is desirable. Therefore, prior to the formation of the magnetic film 7, the brazing between the rotary shaft connecting body 2 and the main body 5 should be performed. In addition to brazing, joining can be performed by a method such as electron beam welding or diffusion joining. Next, the operation of the magnetostrictive detector 1 according to the first embodiment will be described. First, a clockwise torque T as shown in FIG.
When 1 is applied, a compressive force is applied to the B portion of the main body 5 to cause a compressive deformation, and at the same time, since the rotary shaft connecting body 2 and the main body 5 are joined, a tensile force is applied to the A portion of the main body 5 to extend and deform Occurs. On the other hand, when the counterclockwise torque T 2 is applied, a compressive force is applied to the portion A of the main body 5 to cause a compressive deformation, and a tensile force is applied to the portion B to cause an elongation deformation. Since the magnetic permeability of the magnetic film 7 formed on the surface of the main body 5 changes due to this deformation, the change in the magnetic permeability is detected as an impedance change by a coil (not shown) arranged around the main body 5. And the torque applied to the rotating shaft is detected.

【００１２】第２の実施の形態 本実施の形態では、図５に示すような磁歪検出体８を回
転軸の途中に介在させ、該回転軸から伝達されるトルク
によって上記磁歪検出体８の本体部材に歪を発生させ、
該本体部材または本体部材表面の磁性膜の透磁率変化を
測定することにより、回転軸のトルクを求める。以下
に、この磁歪検出体８の構造について説明する。 Second Embodiment In this embodiment, a magnetostrictive detector 8 as shown in FIG. 5 is interposed in the middle of a rotary shaft, and the main body of the magnetostrictive detector 8 is driven by torque transmitted from the rotary shaft. Causing strain on the member,
By measuring the change in the magnetic permeability of the main body member or the magnetic film on the surface of the main body member, the torque of the rotating shaft is obtained. Hereinafter, the structure of the magnetostrictive detector 8 will be described.

【００１３】図５(a) は本発明に係る磁歪検出体の正面
図、図５(b) はその側面図である。この磁歪検出体８
は、図６〜図９に示すような構成部品によって構成され
ており、これらの図面においても、(a) は正面図、(b)
はその側面図である。磁歪検出体８の左右両側には、図
示しない構造により、回転軸連結体９，９が回転軸に連
結されている。該回転軸連結体９，９は、材質が、例え
ばＳ４５Ｃ等であり、円柱部１０から３本の脚部１１が
立設した形状となっている。FIG. 5A is a front view of the magnetostrictive detector according to the present invention, and FIG. 5B is a side view thereof. This magnetostrictive detector 8
Are constituted by components as shown in FIGS. 6 to 9. In these drawings, (a) is a front view, and (b)
Is a side view thereof. On both left and right sides of the magnetostrictive detector 8, rotating shaft connectors 9, 9 are connected to the rotating shaft by a structure (not shown). The rotating shaft connected bodies 9 are made of, for example, S45C or the like, and have a shape in which three legs 11 are erected from a cylindrical portion 10.

【００１４】また、左右の上記回転軸連結体９，９を接
続するために接続具１２が設けられている。図７に示す
ように、該接続具１２は左右両側にそれぞれ３本の脚部
１３が立設しており、その材質はＳ４５Ｃ等が好まし
い。この接続具１２と回転軸連結体９，９の間に、図８
に示す磁歪検出体１の本体１４，１４が設けられてい
る。上記本体１４，１４には、軸方向に沿って３本の溝
１５が、周方向に均等に設けられている。該本体１４，
１４の材質は、その両側の回転軸連結体９，９よりも弾
性率の小さいアルミニウムや銅などが好ましく、この本
体１４，１４の表面には、Ｆｅ−Ｃｏ−Ｓｉ−Ｂ系アモ
ルファス磁性薄膜などの磁性膜１６を形成させる。A connecting tool 12 is provided for connecting the left and right rotating shaft connectors 9 and 9 to each other. As shown in FIG. 7, the connecting tool 12 has three legs 13 on each of the right and left sides, and the material thereof is preferably S45C or the like. 8 between the connecting tool 12 and the rotating shaft connecting bodies 9
The main bodies 14, 14 of the magnetostrictive detector 1 shown in FIG. The main bodies 14 are provided with three grooves 15 evenly in the circumferential direction along the axial direction. The body 14,
The material of 14 is preferably aluminum, copper, or the like having a smaller elastic modulus than the rotating shaft coupling bodies 9, 9 on both sides thereof, and the surfaces of the main bodies 14, 14 are made of Fe-Co-Si-B-based amorphous magnetic thin film. Is formed.

【００１５】そして、磁歪検出体８を組み付ける方法を
説明する。まず、上記回転軸連結体９，９を脚部がそれ
ぞれ向き合うように対向させ、これらの間に接続具１２
と本体１４，１４を配置する。次に、回転軸連結体９，
９の脚部１１と接続具１２の脚部１３を本体１４，１４
の溝１５に嵌合させ、回転軸連結体９，９と本体１４，
１４を第１の実施の形態で用いたものと同様の手段によ
って接合させる。Next, a method of assembling the magnetostrictive detector 8 will be described. First, the rotating shaft connectors 9 and 9 are opposed to each other such that the legs face each other, and a connecting device 12 is provided between them.
And the main bodies 14 and 14 are arranged. Next, the rotating shaft connector 9,
9 and the leg 13 of the connector 12
Into the groove 15 of the rotary shaft connecting body 9, 9 and the main body 14,
14 are joined by the same means as used in the first embodiment.

【００１６】次いで、第２の実施の形態に係る磁歪検出
体８による作用について説明する。まず、磁歪検出体８
に図５(b) に示す時計方向のトルクＴ3 がかかると、右
側の本体１４のＡ部（図８(b) に示す）に圧縮力が加わ
り圧縮変形が生じる。一方、反時計方向のトルクＴ4 が
かかると、左側の本体１４のＡ部に圧縮力が加わり圧縮
変形が生じる。この変形により該本体１４の表面に形成
された磁性膜１６の透磁率が変化するため、この透磁率
変化を本体１４の周囲に配置したコイル（図示せず）に
よりインピーダンス変化として検出することにより、回
転軸に加えられたトルクを検出する。Next, the operation of the magnetostrictive detector 8 according to the second embodiment will be described. First, the magnetostrictive detector 8
When clockwise torque T 3 shown in FIG. 5 (b) such, A portion of the right body 14 (shown in FIG. 8 (b)) compressive force is applied to the compressive deformation occurs. On the other hand, when the torque T 4 in the counterclockwise direction is applied, compressive deformation applied compressive force in the A portion of the left side of the body 14 occurs. Since the magnetic permeability of the magnetic film 16 formed on the surface of the main body 14 changes due to this deformation, the change in the magnetic permeability is detected as an impedance change by a coil (not shown) arranged around the main body 14, Detect the torque applied to the rotating shaft.

【００１７】[0017]

【発明の効果】上述したように、本発明に係るトルクセ
ンサ用磁歪検出体によれば、回転軸のトルクを検出する
のに必要な歪量は０．１％以下であり、捻れ角として
０．５°にも満たない。したがって、本発明により剛性
の高いトルクセンサを提供できる。また、過大なトルク
印加時においても、材料の許容範囲を超える即ち弾性限
界を超える歪は発生しないため、回転軸の破損を防止す
るための特別な安全機構を設ける必要がなく、コストが
安価ですむ。歪発生面に形成した磁性膜の透磁率変化を
測定するため、微小歪に対しても検出感度が高く、回転
軸剛性を高くできる。さらに、本発明は自動車の電動パ
ワーステアリングのアシスト量制御、産業機械や民生機
械の軸トルク検出、加工機械の加工力検出および電動自
転車のアシスト量制御などに用いるトルクセンサ用磁歪
検出体に応用できる。As described above, according to the magnetostrictive detector for a torque sensor according to the present invention, the amount of strain required to detect the torque of the rotating shaft is 0.1% or less, and the twist angle is 0%. Less than 5 °. Therefore, a torque sensor having high rigidity can be provided by the present invention. In addition, even when an excessive torque is applied, no strain exceeding the allowable range of the material, that is, exceeding the elastic limit, does not occur, so there is no need to provide a special safety mechanism for preventing damage to the rotating shaft, and the cost is low. No. Since the change in magnetic permeability of the magnetic film formed on the strain generating surface is measured, the detection sensitivity is high even for minute strain, and the rigidity of the rotating shaft can be increased. Further, the present invention can be applied to a magnetostrictive detector for a torque sensor used for controlling an assist amount of an electric power steering of an automobile, detecting a shaft torque of an industrial machine or a consumer machine, detecting a machining force of a processing machine, and controlling an assist amount of an electric bicycle. .

【図面の簡単な説明】[Brief description of the drawings]

【図１】本図のうち、(a) は第１の実施の形態に係る磁
歪検出体の正面図、(b) はその側面図である。FIG. 1A is a front view of a magnetostrictive detector according to a first embodiment, and FIG. 1B is a side view thereof.

【図２】本図のうち、(a) は第１の実施の形態に係る回
転軸連結体の正面図、(b) はその側面図である。FIGS. 2A and 2B are a front view and a side view, respectively, of the rotary shaft connecting body according to the first embodiment; FIG.

【図３】本図のうち、(a) は第１の実施の形態に係る本
体の正面図、(b) はその側面図である。3A is a front view of the main body according to the first embodiment, and FIG. 3B is a side view thereof.

【図４】本図のうち、(a) は第１の実施の形態に係る回
転軸連結体の正面図、(b) はその側面図である。FIGS. 4A and 4B are a front view and a side view, respectively, of the rotary shaft connecting body according to the first embodiment; FIG.

【図５】本図のうち、(a) は第２の実施の形態に係る磁
歪検出体の正面図、(b) はその側面図である。FIG. 5A is a front view of a magnetostrictive detector according to a second embodiment, and FIG. 5B is a side view thereof.

【図６】本図のうち、(a) は第２の実施の形態に係る回
転軸連結体の正面図、(b) はその側面図である。FIG. 6A is a front view of a rotary shaft connector according to a second embodiment, and FIG. 6B is a side view thereof.

【図７】本図のうち、(a) は第２の実施の形態に係る接
続具の正面図、(b) はその側面図である。FIG. 7A is a front view of a connector according to a second embodiment, and FIG. 7B is a side view thereof.

【図８】本図のうち、(a) は第２の実施の形態に係る本
体の正面図、(b) はその側面図である。8A is a front view of a main body according to the second embodiment, and FIG. 8B is a side view of the main body.

【図９】本図のうち、(a) は第２の実施の形態に係る回
転軸連結体の正面図、(b) はその側面図である。FIG. 9A is a front view of a rotary shaft connecting body according to a second embodiment, and FIG. 9B is a side view thereof.

【符号の説明】[Explanation of symbols]

１ 磁歪検出体 ２ 回転軸連結体 ３ 円柱部 ４ 脚部 ５ 本体 ６ 溝 ７ 磁性膜 ８ 磁歪検出体 ９ 回転軸検出体 １０ 円柱部 １１ 脚部 １２ 接続具 １３ 脚部 １４ 本体 １５ 溝 １６ 磁性膜 REFERENCE SIGNS LIST 1 Magnetostrictive detector 2 Rotating shaft connector 3 Column 4 Leg 5 Main body 6 Groove 7 Magnetic film 8 Magnetostrictive detector 9 Rotary shaft detector 10 Column 11 Leg 12 Connector 13 Leg 14 Main body 15 Groove 16 Magnetic film

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 トルクが加わる二つの回転軸の間に配設
されて該回転軸よりも弾性率が小さい本体部材を含み、
該本体部材が磁性材料で形成され、または、該本体部材
の表面に磁性膜が形成され、かつ、上記回転軸の間に挟
持され、回転軸から伝達されるトルクによって上記本体
部材に歪を発生させ、この本体部材または本体部材表面
の磁性膜の透磁率の変化を測定することにより、回転軸
のトルクを求めることを特徴とするトルクセンサ用磁歪
検出体。1. A body member disposed between two rotating shafts to which a torque is applied and having a lower elastic modulus than the rotating shafts.
The main body member is formed of a magnetic material, or a magnetic film is formed on the surface of the main body member, and the main body member is sandwiched between the rotating shafts, and the main body member is distorted by torque transmitted from the rotating shaft. A magnetostrictive detector for a torque sensor, wherein a torque of a rotating shaft is obtained by measuring a change in magnetic permeability of the main body member or a magnetic film on a surface of the main body member. 【請求項２】 上記本体部材が回転軸の間に挟持され、
かつ、接合されていることを特徴とする請求項１に記載
のトルクセンサ用磁歪検出体。2. The method according to claim 1, wherein the main body member is sandwiched between rotating shafts,
The magnetostrictive detector for a torque sensor according to claim 1, wherein the magnetostrictive detector is joined. 【請求項３】 一端に軸方向に突出した脚部を有する回
転軸連結部材と、該脚部が嵌合される溝を有する本体部
材とを含み、これらの回転軸連結部材と本体部材が両側
から回転軸に固定され、上記脚部同士が向き合うように
回転軸連結部材を対向させ、これらの間に本体部材を配
置し、脚部を上記溝に嵌合し、連結部材の他端を回転軸
に固定するようにしたことを特徴とする請求項１または
２に記載のトルクセンサ用磁歪検出体。3. A rotary shaft connecting member having a leg protruding in the axial direction at one end, and a main body member having a groove into which the leg is fitted, wherein the rotary shaft connecting member and the main body member are on both sides. The rotating shaft is fixed to the rotating shaft, the rotating shaft connecting members face each other so that the legs face each other, the main body member is disposed therebetween, the legs are fitted in the grooves, and the other end of the connecting member is rotated. 3. The magnetostrictive detector for a torque sensor according to claim 1, wherein the magnetostrictive detector is fixed to a shaft. 【請求項４】 一端に軸方向に突出した第１の脚部を有
する２個の回転軸連結部材と、該脚部が嵌合される溝を
有する２個の本体部材と、両端に軸方向に突出した第２
の脚部を有し、上記本体部材同士を接続する接続部材
と、これらの回転軸連結部材、本体部材および接続部材
を両側から回転軸に固定し、上記脚部同士が向き合うよ
うに回転軸連結部材を対向させ、これらの間に本体部材
と接続部材を配置し、上記第１の脚部および第２の脚部
を本体部材の溝に嵌合させることにより回転軸連結部
材、本体部材および接続部材を結合させ、連結部材の他
端を回転軸に固定するようにしたことを特徴とする請求
項１または２に記載のトルクセンサ用磁歪検出体。4. Two rotating shaft connecting members having first legs protruding in the axial direction at one end, two body members having grooves into which the legs are fitted, and axial ends at both ends. The second protruding
A connecting member for connecting the main body members to each other, and fixing the rotating shaft connecting member, the main body member and the connecting member to the rotating shaft from both sides, and connecting the rotating shaft so that the legs face each other. The rotating shaft connecting member, the main body member, and the connection member are opposed to each other, and the main body member and the connecting member are disposed therebetween, and the first leg and the second leg are fitted into the grooves of the main body member. The magnetostrictive detector for a torque sensor according to claim 1 or 2, wherein the members are connected to each other, and the other end of the connecting member is fixed to the rotating shaft.
JP4514397A 1997-02-28 1997-02-28 Magnetostrictive detector for torque sensor Pending JPH10239183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4514397A JPH10239183A (en) 1997-02-28 1997-02-28 Magnetostrictive detector for torque sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4514397A JPH10239183A (en) 1997-02-28 1997-02-28 Magnetostrictive detector for torque sensor

Publications (1)

Publication Number Publication Date
JPH10239183A true JPH10239183A (en) 1998-09-11

Family

ID=12711065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4514397A Pending JPH10239183A (en) 1997-02-28 1997-02-28 Magnetostrictive detector for torque sensor

Country Status (1)

Country Link
JP (1) JPH10239183A (en)

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