Kubota Corporation

Taro Saito

Renshiro Ishino

Mutsumi Sunahata

Shigeo Yoshimura

Shiro Takada

Keiichi Sanpei

Akira Nakamoto

Takuji Mori

Yoshitaka Sato

Akiyoshi Hanazawa

Kazunori Sakunaga

Yoshibumi Nagamine

Yasuo Tanizaki

Matsumi Sunahata

Takaaki Ohno

Hirobumi Sakane

Kazumi Umeki

Masahide Tsujino

Magnetostrictive torque sensor shaft

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 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

Cultivating tines, each having opposite cutting edges, are pivotably supported by tine mount members on a tine shaft reversibly rotatable about a horizontal lateral axis. One of the cutting edges of the tine is retainable in a position rearward with respect to the direction of forward rotation, while the other cutting edge is retainable in a position rearward with respect to the direction of reverse rotation. When held in each of these positions, the tine is restrained by resistant force imparting means from being pivotally moved by a centrifugal force. The resistant force to be imparted by this means is smaller than the reaction to be produced when the tine is driven into the soil.

Structure for attaching tines for cultivation by reversible rotation in

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Minamikawachi, Japan

Taro Saito