Patent ID: 11933398
Assignee: UNIPRES CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 5:
6. The two-speed transmission apparatus for an electric vehicle according to claim 2,
wherein said two-speed transmission apparatus includes a planetary gear-type transmission mechanism being connected to said input axis and said output axis,
wherein said input axis is coaxially disposed in said housing with said output axis,
wherein said planetary gear-type transmission mechanism includes a carrier that a pinion is axially supported and three rotational elements associated with two gears having different tooth number meshing with said pinion, and said input axis and said output axis are connected to two elements of said three-rotational element,
wherein an arrangement of said first multi-plate friction clutch and said second multi-plate friction clutch against said three rotational elements and said housing constitutes said planetary gear-type transmission mechanism as a first gear mechanism so as to get a first speed transmission ratio between said input axis and said output axis by a fastening of said first multi-plate friction clutch and a no-fastening of said second multi-plate friction clutch due to said thrust transmission mechanism, and
wherein an arrangement of said first multi-plate friction clutch and said second multi-plate friction clutch against said three rotational elements and said housing constitutes said planetary gear-type transmission mechanism as a second gear mechanism so as to get a second speed transmission ratio between said input axis and said output axis by a no-fastening (release) of said first multi-plate friction clutch and a fastening of said second multi-plate friction clutch due to said thrust transmission mechanism.