Hydraulic speed-changing bicycle

Abstract

The hydraulic speed-changing bicycle includes a driving system formed from pedals, oil pump, oil circuit board, non-return valve, pressure oil pipe, hydraulic control valve, left and right connectors, oil motor and oil-returning pipe, a brake system formed from left brake bar, cam, plunger pump, oil deflector pipe, oil cylinder, brake clamp, brake rubber and non-return valve, an oil-supplementingsystem formed from oil-storing vertical pipe, pressure-increasing pipe and air-exhausting cock, a bicycle body and its accessories. Said invention is reasonable in structure, fase and realiable, can raise bicycle speed, can automatically regulate flow rate and pressure relationship, so that it is optimum substituted for motorcycle and electric bicycle.

Description

Technical field [0001] 本发明涉及一种自行车,特别是一种液压变速自行车。 Background technique [0002] 中国专利(专利号87209033)中公开了一种“变速液压自行车”,该车虽然较以前同类的自行车有一定的先进性,但不能实用,其存在的问题主要是:1、在向贮油管加油时,系统内的空气无法完全排出,空气穴破坏了液压传动的连续性,每骑行一小段路,车子便失去动力,产生踏空现象(似链条车“飞轮”中辣爪失灵),车子突然停止,造成交通事故。2、利用大气压作为闭合回路中油液补偿动力是不够的。因为叶片油泵的工作原理是利用容积的变化,产生真空度吸油,当脚踏转角很小时,就不能保障有足够的进油量,补充系统油泵,油马达正常间隙的内泻,使容积效率下降,影响车速。3、自行车在平路滑行或下坡,脚踏停止驱动后,在油泵出油口至油马达进油口段压力油完全卸荷,当再驱动脚踏,压力油路内的油压很难立刻升至工作压力驱动油马达。当车子在经绿灯处停车后(骑行者未必下车)再驱动,车子会“死火”,阻塞道路。4、用手动伐阻塞油马达回油路的同时,用脚驱动油泵加压来制动油马达,从而达到停车的目的,在理论上可行,但存在手脚同步操作困难,制动力受油泵,油马达刚度限制,可靠性差,还降低了结构复杂且成本较高的油泵、油马达的使用寿命。 Contents of the invention [0003] 本发明的目的在于提供一种结构合理、高效环保、方便实用,制动力大,安全可靠,既提高了车速,又使骑行者在平直路面或上坡时,不会产生附加功率和增加脚踏驱动力的液压变速自行车。 [0004] 本发明的目的可以通过以下措施来达到:一种液压变速自行车,包括车体、附件,其特征在于:还包括在由脚踏、油泵、油路板、止回阀、压力油管、液控阀、左接头、油马达、右接头、回油管组成的驱动系统,由左闸把、凸轮、柱塞泵、导油管、油缸,制动钳、闸皮、单向阀组成的制动系统,由贮油立管、增压管、排气旋塞组成的补油系统,油泵连接在油路板的下方,压力油管及回油管的一端进出口均与油路板相接,而另一端,压力油管与液控阀、左接头联接,左接头与油马达的配流轴铰接,油马达配流轴的回油孔则与右接头、回油管、油路板相通,止回阀与油路板3联接,凸轮与左闸把转轴相接,柱塞泵安装在凸轮下方,与沿车架布置的导油管、油缸...

AI Technical Summary

Problems solved by technology

[0002] Disclosed a kind of " variable speed hydraulic bicycle " in the Chinese patent (patent No. 87209033), although this bicycle has certain advancement than the bicycle of the same kind in the past, can not be practical, and the problem of its existence mainly is: At this time, the air in the system cannot be completely discharged, and the air cavity destroys the continuity of the hydraulic transmission. Every time a short distance is ridden, the car loses power, resulting in the phenomenon of stepping into the air (like the failure of the claws in the "flywheel" of the chain car), the car Sudden stop, causing traffic accident

2. It is not enough to use atmospheric pressure as the oil compensation power in the closed circuit

Because the working principle of the vane oil pump is to use the volume change to generate a vacuum to absorb oil, when the pedal rotation angle is small, it cannot guarantee enough oil intake, supplement the system oil pump, and the internal leakage of the oil motor's normal clearance will reduce the volumetric efficiency. , affecting the vehicle speed

3. When the bicycle slides on a flat road or goes downhill, after the pedals stop driving, the pressure oil in the section from the oil pump outlet to the oil motor inlet is completely unloaded. When the pedals are driven again, the oil pressure in the pressure oil circuit is difficult. Immediately rise to working pressure to drive the oil motor

4. While blocking the oil return circuit of the oil motor by manual cutting, at the same time, use the foot to drive the oil pump to pressurize the oil motor to achieve the purpose of stopping. It is theoretically feasible, but it is difficult to operate synchronously with hands and feet. The rigidity of the motor is limited, the reliability is poor, and the service life of the oil pump and oil motor with complex structure and high cost is also reduced

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