Magnetic clutch device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHidekazu NAGAI, Hiroyuki Shioiri, Takashi Ohta, Yoshihiro Mizuno, Eiji Tsuchiya, Norio Yonezawa
Life of this patent
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Abstract
A magnetic clutch device having improved durability and reliability without increasing a size in an axial direction. A fixed member, the first engagement element, and a second engagement element are arranged concentrically to one another in order from a rotational center axis. The first engagement element comprises a first magnet. The fixed member comprises a second magnet in which a polarity is switched between a straight polarity and a reversed polarity, and a coil that switches the polarity of the second magnet depending on a direction of the current applied thereto.
Claims8
A magnetic clutch device, that engages a first engagement element and a second engagement element with each other to transmit torque by establishing a magnetic circuit between the first engagement element and the second engagement element, and that disengages the first engagement element and the second engagement element from each other to interrupt torque transmission by eliminating the magnetic circuit between the first engagement element and the second engagement element,
- wherein the first engagement element and the second engagement element are arranged concentrically to each other,
- a fixed member that is not allowed to rotate is arranged in a radially inner side or radially outer side of the first engagement element and the second engagement element while being concentrically to the first engagement element and the second engagement element,
- the first engagement element includes a first magnet,
- the fixed member includes a second magnet in which a polarity is switched between a straight polarity and a reversed polarity in accordance with a direction of the magnetic circuit established by the first magnet between the first engagement element and the second engagement element, and a coil that switches the polarity of the second magnet depending on a direction of the current applied thereto,
- the second engagement element is situated in radially opposite side of the fixed member across the first engagement element, and the second engagement element is formed of a magnetic body through which the magnetic circuit penetrates, and
- the magnetic circuit circulating between the first engagement element and the second engagement element is eliminated when the polarity of the second magnet is set in the straight polarity.
Dependencies are inferred from the claim text.