Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Hideaki Takei

Hitoshi Inoue

Kiyohide Okamoto

Ryosuke Okita

Kenji Kataoka

Masaya Yamada

Ryosuki Okita

Tsuguyasu Mizoue

Tadatoshi Takayanagi

Yoshiharu Kobayashi

A magnetic particle type electromagnetic clutch has two clutch discs so disposed that the two discs can be electromagnetically connected together and disconnected. In a space between the two discs are charged magnetic particles. When an excitation current is run through the excitation coil disposed near the two discs to produce a magnetic flux, the two discs and magnetic particles are magnetized to be connected in unison, thereby transmitting a torque from the drive shaft to the driven shaft. The two discs are each secured to the tip end of the shafts. The shaft has two groups of magnetic layers which are rigidly affixed to the shaft and axially spaced. Each of the groups of magnetic layers is directed + 45 degrees or - 45 degrees with respect to the axis of the shaft. When the shafts start to rotate, magnetostriction is developed in the respective magnetic layers resulting in a change in permeability. The change in permeability is causes the change in impedance of a first and second detecting coils so disposed that they face the magnetic layers. The change in impedance is electrical representation of the torque applied to the shafts.

Magnetic particle type electromagnetic clutch with torque detector

A magnetic particle-type electromagnetic coupling apparatus is cooled by a plurality of heat pipes which are partially embedded in the outer periphery of a rotating coupling member near the portion of the coupling member which is in contact with magnetic particles during operation. Heat is removed from the coupling member by a working fluid which is sealed within the heat pipes and is dissipated to the atmosphere through cooling fins attached to the heat pipes.

Electromagnetic coupling apparatus equipped with heat pipes

Growing community of inventors

Himeji, Japan

Hideaki Takei