Transmission apparatus for electric vehicle

Abstract

The present invention relates to a transmission device for an electric vehicle, comprising: an input shaft that rotates according to power of an electrically driven motor; and a pair of input gears that are disposed on the input shaft And having mutually different outer diameters; an output shaft configured with a low speed gear and a high speed gear selectively rotated by the pair of input gears;and a synchronizing device disposed at the low speed gear of the output shaft And the high speed gear, and while sliding in the axial direction, selectively connecting with any one of the low speed gear and the high speed gear to be synchronized with the output shaft; and a parking gear, wherein The sides of any one of the input gears are integrally formed and selectively locked by the parking pawls to perform a parking action.

Description

technical field [0001] The present invention relates to a transmission device for an electric vehicle, and in more detail, to a transmission device for an electric vehicle that uses a synchronizing device to realize two-speed shifting while reducing components of a parking device. Background technique [0002] In general, an internal combustion engine such as a gasoline engine or a diesel engine used as a prime mover for an automobile burns a fossil fuel in a cylinder and uses the heat generated at this time as power. [0003] Therefore, its exhaust gas contains harmful components such as combustion-related nitrogen oxides (Nox), carbon monoxide (CO) or hydrocarbons (HC) due to incomplete combustion. This composition pollutes the atmosphere with the increase of vehicles and is harmful to the human body, thereby causing public nuisance problems. [0004] Therefore, various exhaust gas countermeasures are being sought to reduce harmful components of automobiles using internal...

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Problems solved by technology

[0009] However, conventional transmissions for electric vehicles require a clutch that cuts off the power from the motor for speed synchronization during gear shifting, so the device is complicated, and since it is a manual transmission, if the shift lever is manipulated during gear shifting, it will receive resistance until the speed is synchronized. , so there is difficulty in shifting control, and there is a problem that the characteristics of the motor cannot be effectively used

[0010] In addition, the parking device used in the transmission device for an electric vehicle is also independently provided on the output shaft, so that due to the lack of free space in the device, it acts as a factor that reduces the operability of the shift lever, and also reduces the degree of freedom in design. Difficult problems in layout and increased production costs due to complex connection structure and large number of parts

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