The invention discloses an electric bicycle frame which comprises a frame body and a front fork, the frame body comprises a head tube and an inclined tube, the head tube comprises a first inner tube and a first outer tube which are spaced, a plurality of reinforcing ribs are arranged between the first inner tube and the first outer tube, and a first wire passing hole and a limiting hole are formed; the front fork comprises a vertical pipe, a fork shoulder and a fork foot, an annular kidney-shaped hole is formed in one side of the fork shoulder, a protruding positioning piece is arranged on the other side of the fork shoulder, the annular kidney-shaped hole coincides with the first wire passing hole, and the positioning piece is arranged in the limiting hole. The head pipe is of an inner pipe and outer pipe structure, reinforcing ribs are arranged between the head pipe and the outer pipe to form a wire passing hole and a limiting hole, the wire passing hole is used for hiding a cable and a brake cable, the limiting hole is used for guaranteeing movable fit of a frame and a front fork, and the strength requirement of the head pipe is greatly improved; the bottom bracket is circumferentially welded with the upper layer and the lower layer of the seat tube, and the bottom bracket and the bottom fork are welded front and back, so that the strength of the bicycle body is well ensured.
本发明公开了一种电动自行车车架,包括车架和前叉,车架包括头管和斜管,头管包括具有间距的第一内管和第一外管,第一内管与第一外管之间布置有若干加强筋,并形成第一过线孔和限位孔;前叉包括立管、叉肩及叉脚,叉肩的一侧设置有环形腰孔,另一侧设置有凸起的定位件,环形腰孔与第一过线孔重合,定位件置于限位孔内。设置头管为内管外管结构,并在之间设置加强筋形成过线孔和限位孔,过线孔用于隐藏电缆线和刹车线,限位孔用于保证车架与前叉的活动配合,且极大提升了头管强度要求,设置五通为上下分层结构,五通与斜管的上下连接焊接,五通与座管的上下两层圆周焊接,五通与平叉的前后焊接结构布置,很好的保证了车身的强度。
Electric bicycle frame
一种电动自行车车架
2022-07-29
Patent
Electronic Resource
Chinese