JPH01126540U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明に係るトルク検出装置の一実
施例を示す軸方向縦断面図、第２図はこの発明に
係るトルク検出装置の他の実施例を示す軸方向縦
断面図、第３図は非接触磁路部の面積を拡大した
トルク検出装置の構造例を示す軸方向縦断面図、
第４図は第３図のトルク検出装置における非接触
磁路部の拡大断面説明図、第５図は非接触磁路部
の面積を拡大したトルク検出装置の他の構造例を
示す軸方向縦断面図、第６図および第７図は非接
触磁路部の面積を拡大したトルク検出装置におけ
る非接触磁路部の他の形状例を示す各々拡大断面
説明図、第８図は非接触磁路部の面積を拡大しな
いトルク検出装置における非接触磁路部の拡大断
面説明図、第９図は非接触磁路部の面積によるト
ルク検出感度への影響を調べた結果を例示するグ
ラフ、第１０図は従来のトルク検出装置の軸方向
縦断面図、第１１図はトルク検出装置に接続する
検出回路を例示する説明図、第１２図は第１１図
の検出回路で検出したトルク検出装置の出力特性
を例示するグラフ、第１３図は従来のトルク検出
装置の他の構造例を示す軸方向縦断面図である。 １……トルク検出装置、２……被検軸、３ａ，
３ｂ……溝、４ａ，４ｂ……磁気異方性部、５…
…間隙、６，７……コイル、８……間隙、９ａ，
９ｂ……ヨーク、１１……軸受。 FIG. 1 is an axial longitudinal cross-sectional view showing one embodiment of the torque detecting device according to the present invention, FIG. 2 is an axial longitudinal cross-sectional view showing another embodiment of the torque detecting device according to the present invention, and FIG. is an axial longitudinal cross-sectional view showing a structural example of a torque detection device in which the area of the non-contact magnetic path section is expanded;
Fig. 4 is an enlarged cross-sectional explanatory diagram of the non-contact magnetic path section in the torque detecting device shown in Fig. 3, and Fig. 5 is an axial longitudinal cross-sectional view showing another structural example of the torque detecting device in which the area of the non-contact magnetic path section is enlarged. 6 and 7 are enlarged cross-sectional explanatory diagrams showing other examples of shapes of the non-contact magnetic path section in a torque detection device in which the area of the non-contact magnetic path section is enlarged, and FIG. 8 is an explanatory diagram of the non-contact magnetic path section FIG. 9 is an enlarged cross-sectional explanatory diagram of a non-contact magnetic path section in a torque detection device in which the area of the path section is not enlarged; FIG. FIG. 10 is an axial longitudinal cross-sectional view of a conventional torque detection device, FIG. 11 is an explanatory diagram illustrating a detection circuit connected to the torque detection device, and FIG. 12 is a diagram of the torque detection device detected by the detection circuit in FIG. A graph illustrating output characteristics, and FIG. 13 is an axial longitudinal cross-sectional view showing another structural example of a conventional torque detection device. 1...Torque detection device, 2...Test axis, 3a,
3b...Groove, 4a, 4b...Magnetic anisotropic part, 5...
...Gap, 6,7...Coil, 8...Gap, 9a,
9b...Yoke, 11...Bearing.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 被検軸の表面に磁気異方性部を設け、磁束の発
生により前記磁気異方性部を通る磁気回路を形成
するコイルを前記磁気異方性部の外側に間隙をお
いて配設し、前記被検軸に加えられるねじりトル
クによる前記磁気異方性部での磁気ひずみを利用
して当該被検軸に加えられたトルクを検出するト
ルク検出装置において、前記コイルの間に、当該
コイルを前記磁気異方性部の外側に間隙をおいて
支持する軸受を配設したことを特徴とするトルク
検出装置。 A magnetic anisotropic portion is provided on the surface of the shaft to be tested, and a coil that forms a magnetic circuit passing through the magnetic anisotropic portion by generation of magnetic flux is disposed with a gap outside the magnetic anisotropic portion, In the torque detection device that detects the torque applied to the test shaft by using magnetostriction in the magnetic anisotropic part due to torsional torque applied to the test shaft, the coil is placed between the test shafts. A torque detection device characterized in that a bearing is disposed outside the magnetic anisotropic portion to support the magnetic anisotropic portion with a gap therebetween.