Kubota Corporation

Mutsumi Sunahata

Taro Saito

Renshiro Ishino

Shigeo Yoshimura

Shiro Takada

Katsuyuki Miyake

Akiyoshi Hanazawa

Tomoyoshi Sawada

Akira Nakamoto

Takuji Mori

Kazunori Sakunaga

Yasuo Tanizaki

A torque measuring system can detect the magnitude of a torque applied to a torque sensing shaft and output a torque signal with respect to the torque. A torque sensor of the system has a measurement mode for producing torque signals and a correction mode for correction of its detection characteristics. An external signal for selection of one of the two modes is supplied to the torque sensor by a characteristic check device. The correction mode enables the correction of the torque sensor characteristics to be effected accurately and in a short time period without requiring manual labor.

Torque measuring system

A torque transducer including a ferromagneto-stricting device provided for a rotational shaft, a magnetic field supply device for supplying a magnetic field to the ferromagneto-stricting device, a sensing device for sensing a change in the magnetic permeability of the ferromagneto-stricting device caused by torque applied to the rotational shaft, a fixed housing for rotatably supporting the rotational shaft, an electromagnetic shielding device for electrically shielding the magnetic field supply device and the sensing device, and a spacer interposed between the fixed housing and the electromagnetic shielding device for causing the electromagnetic shielding device to be held in the fixed housing.

Torque transducer

A torque sensor shaft for a non-contacting torque sensor including magnetically anisotropic portions formed on the surface of the shaft. Absolute value of angle of inclination of the anisotropic directions of the magnetically anisotropic portions is set lower than 40 degree so as to permit reduction of stress components in the anisotropic directions from their level in the case where the absolute value of the angle is 45 degree. By such angle setting it is possible to prevent possible decrease in sensor sensitivity and, in addition, to obtain good improvement in the point of magnetic saturation due to torque applied, thereby to obtain an improved dynamic range.

Torque sensor shaft

Growing community of inventors

Sakai, Japan

Mutsumi Sunahata