ELECTRIC AUTOMOBILE DRIVE APPARATUS

摘要

Construction of an electric automobile drive apparatus is realized in which the relationship of the traveling speed and acceleration of a vehicle can be made smooth and closer to the ideal, and the transmission efficiency can be maintained. A bypass gear-transmission mechanism 10, a toroidal continuously-variable transmission 11, a first planetary-gear mechanism 12 and a second planetary-gear mechanism 13 are arranged parallel to each other in the power transmission direction between a driving-side rotating shaft 4a that is the input shaft and a driven-side rotating shaft 5a that is the output section and that is arranged parallel to the driving-side rotating shaft 4a. A first clutch mechanism 16 is provided between the bypass gear-transmission mechanism 10 and the driven-side rotating shaft 5a, and a second clutch mechanism 44 and third clutch mechanism 49 are provided between the output gear 38 of the toroidal continuously-variable transmission 11 and first planetary-gear mechanism 12 and second planetary-gear mechanism 13.

主权项

1. An electric automobile drive apparatus comprising:
a toroidal continuously-variable transmission and at least two clutch mechanisms, that are provided between an input shaft that is rotated and driven by an electric motor and an output section that outputs power based on the rotation of the input shaft; the toroidal continuously-variable transmission comprising: an output disk that has an output-side curved surface that is a toroidal curved surface; an input disk that is supported concentric with the output disk such that an input-side curved surface that is a toroidal curved surface faces the output-side curved surface, and so as to be able to rotate relative to the output disk; plural support members that are arranged so as to be able to pivotally displace around pivot shafts that are located at positions that are skewed with respect to the center axis of the output disk and input disk; plural power rollers that are supported by the support members so as to freely rotate, and are held between the output-side curved surface and the input-side curved surface; and a mechanism that is able to regulate torque that is transmitted by the toroidal continuously-variable transmission; and the electric automobile drive apparatus configured to switch the engaged and disengaged states of the clutch mechanisms and control operation of the mechanism that is able to regulate torque that is transmitted by the toroidal continuously-variable transmission, so as to switch among: a bypass mode in which, by keeping the size of the torque that passes through the toroidal continuously-variable transmission to a minimum regardless of the size of the output torque from the electric motor, essentially all of the power from the electric motor is transmitted to the output section by bypassing the toroidal continuously-variable transmission; a low-speed mode in which all or part of the power from the electric motor is transmitted to the output section by way of the toroidal continuously-variable transmission, and in which a state having a speed reducing ratio that is larger than that in the bypass mode is achieved; and a high-speed mode in which all or part of the power from the electric motor is transmitted to the output section by way of the toroidal continuously-variable transmission, and in which a state having a speed reducing ratio that is smaller than that in the bypass mode is achieved.