TORQUE MEASURING DEVICE

• Main Authors: FUJIMORI AKITOSHI, FUKUI HISAYOSHI, FUKUDA AKIHIRO, KIMOTO TAKASHI, KOBAYASHI MASAHIRO, ODERA TAKAHIRO, KIM YIMING
• Format: Patent
• Language: English; Japanese
• Published: 13.09.2023
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

To provide a torque measuring device that can prevent damage to a coil unit during assembly work and can reduce the number of components.SOLUTION: A torque measuring device 1 comprises: a case 2 that is formed of magnetic metal; a rotation shaft 3 that is rotatably arranged inside the case 2 and has a magnetostrictive effect part in which permeability changes according to torque to be transmitted; and a torque sensor 4 that is arranged around the magnetostrictive effect part and supported by the case 2. The torque sensor 4 has a coil unit 7 that is formed in a cylindrical shape with a flexible substrate having a detection coil that changes voltage in correspondence with a change in the magnetic permeability of the magnetostrictive effect part, and a holder 8 that is formed of rubber or synthetic resin and covers an outer peripheral surface and side faces on both sides in an axial direction of the coil unit 7. The torque sensor is supported on the case 2 with an outer peripheral surface of the holder 8 fitted into an inner peripheral surface of the case 2.SELECTED DRAWING: Figure 1 【課題】組立作業の際にコイルユニットが損傷しにくく、かつ、部品点数を抑えることができるトルク測定装置を提供する。【解決手段】トルク測定装置１は、磁性金属製のケース２と、ケース２の内側に回転自在に配置され、かつ、伝達するトルクに応じて透磁率が変化する磁歪効果部を有する回転軸３と、磁歪効果部の周囲に配置され、かつ、ケース２に支持されたトルクセンサ４とを備える。トルクセンサ４は、磁歪効果部の透磁率の変化に対応して電圧を変化させる検出コイルを有するフレキシブル基板により円筒状に構成されたコイルユニット７と、ゴムまたは合成樹脂により構成され、コイルユニット７の外周面および軸方向両側の側面を覆うホルダ８とを有し、かつ、ケース２の内周面にホルダ８の外周面を内嵌した状態で、ケース２に支持されている。【選択図】図１