A new-type bike features that its pedal crank has an arc rack bar acting on the ratchet gear in single direction and in turn driving the drive chain wheel, a reset unit composed of crank mechanism is used to make left and right pedal cranks be pedaled alternatively, and its front movable saddle plate is connected via connecting rod to pedal crank for making rider comfortable. Its advantages are high drive performance and efficiency and saving labour.

一種新式自行車(chē)麻豆精品在线观看视频，其最大特點(diǎn)是蹬踏桿上含有一弧形齒條狼色行动在线视频，由該弧形齒條上的輪齒作用于具有單向離合的棘齒輪无码国产有码精品91，從而帶動(dòng)主動(dòng)鏈輪轉(zhuǎn)動(dòng)玖玖相交视频，由曲柄機(jī)構(gòu)組成的復(fù)位器使左右蹬踏桿能夠交替連續(xù)踩踏以驅(qū)動(dòng)自行車(chē)行駛，前活動(dòng)座板與蹬踏桿由連桿相連結(jié)欧美亚洲日本高清不卡，從而實(shí)現(xiàn)同步擺動(dòng)給以乘騎者踩踏感到舒適www.淫荡网，該發(fā)明具有傳動(dòng)性能好，效率高0808贵妃网理论片，力損耗小等優(yōu)點(diǎn)sese96。