Electric bicycle

Abstract

The present invention provides an electric bicycle in which the center of gravity is lowered and the layout of parts becomes compact. An electric motor (65) is provided on the rear wheel (12) of the electric bicycle (10), and a battery bottom support member (47b) for supporting the bottom of the battery (46) is provided on the upper part of the crankshaft support member (30). Furthermore, the rear end portion of the down tube (22) and the front end portion of the rear arm (53) supporting the rear wheel (12) are connected to the crankshaft support member (30). In addition, the crankshaft support member (30) is constituted by a member having a side surface portion (31), (32) and a front surface portion (33) connecting the side surface portions (31), (32) and having a "U" shape in plan view. Both ends of the crankshaft (61) are supported by the side surfaces (31) and (32). In addition, the support shaft (55b) of the bracket (55), the connecting shaft (53c) of the rear arm (53), and the mounting piece (36) are spanned between the side parts (31) and (32).

Description

technical field [0001] The present invention relates to an electric bicycle having a pedal crank portion for inputting driving force and an electric motor for generating driving force. Background technique [0002] Conventionally, an electric bicycle having a pedal crank portion for driving force input by the driver and an electric motor for generating driving force other than the driving force input by the driver (for example, refer to Patent Document 1 ). In this type of electric bicycle, a power unit including a pedal crank portion, an electric motor, etc. is supported by a down tube and a seat tube through a metal plate fitting at the lower center side of the vehicle body. In addition, a pair of left and right chainstays extend rearward from the fitting, and the rear ends of the chainstays and the upper end of the seat tube are connected by the pair of left and right chainstays. Also, a cup-shaped case for installing the lower part of the battery is mounted on the uppe...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned conventional electric bicycles, since the storage battery is arranged above the power part through the assembly parts, although it is located in the vicinity of the center of gravity in the front-rear direction of the vehicle body, since the assembly parts are provided between the battery and the power part , so the position of the battery is raised accordingly

Therefore, since the center of gravity of the electric bicycle becomes higher and the number of parts increases, the lowering of the center of gravity of the electric bicycle as a whole and the compactness of the layout of parts are hindered.

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