CN2132682Y

CN2132682Y - Bidirectional pedal change bicycle

Info

Publication number: CN2132682Y
Application number: CN 92226285
Authority: CN
Inventors: 于志国
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-27
Filing date: 1992-06-27
Publication date: 1993-05-12
Anticipated expiration: 2002-06-27

Abstract

The utility model relates to a speed changing bicycle, which can move forward by bidirectionally pedalling. The utility model is composed of a driving chain wheel of the bicycle, a sets of positive driven chain wheels with the coaxial gear wheel, and a sets of inverse driven chain wheel groups with the coaxial gear wheel, wherein, the two gear wheels are engaged with each other. The chain transmission is completed by the driving chain wheel of the bicycle and the positive driven chain wheel groups, the gear wheel transmission is completed by the driving chain wheel of the bicycle and the inverse driven chain wheels, and therefore, the bicycle all can be kept moving forward by pedalling in positive direction or in inverse direction; moreover, the speed can be changed by changing the gear ratio of the two gear wheels. The utility model has the advantages that the gradeability is strong; the speed is high; the single posture and the centre of gravity of a user on the bicycle can be changed by alternately pedalling in positive direction or in inverse direction; the aim of relieving fatigue and exercising a body is achieved.

Description

Bidirectional pedal change bicycle

The utility model relates to a kind of two-way variable speed bicycle that steps, and belongs to the manually driven wheeled car.

The various bicycles of Chu Shouing all are that just row steps in the market, and when the rider oppositely stepped, the driven sprocket of vehicle " flew " to be in idling conditions.The utility model of application number 89219444.8 discloses a kind of " the two-way device that steps of bicycle " adopts the scheme that increases middle " third wheel " and coaxial sprocket, and the outer cover chain drive system that adds makes bicycle realize stepping on the just purpose of row.The installation more complicated of this cover mechanism, it is bigger to take up space on bicycle, and the friction drag of bicycle is increased.

The purpose of this utility model be to provide a kind of by by two groups just, fall the two-way device that steps that driven sprocket " flies " and in-line gears are formed, finish the two-way requirement that bicycle is just being gone that steps by gear transmission, institute takes up space little, and the bicycle friction drag is little, and is easy for installation.

The technical solution of the utility model is to realize like this, on the basis of the original pedal mechanism of bicycle, increasing a backward " flies ", backward " flies " and the bicycle drive sprocket, bicycle just going " flying " constitute chain-driving, when drive sprocket reverses, power-transfer clutch in backward " flies " is in engagement state, and when drive sprocket was just changeing, " flying " internal clutch of just going was in engagement state, just go " flying " and backward " flies " respectively to establish in-line gears, two gears are meshed, when just stepping on, chain drive just go " flying " the bicycle maintenance is advanced, when stepping on, backward " flies " in-line gears and drives by engagement and just go " flying " in-line gears the bicycle maintenance is advanced.Be provided with guide wheel in the outside of two " flying " to keep chain " cornerite ".The device that steps of the present utility model can change the number of teeth of the number of teeth of sprocket wheel and gear to adjust bicycle speed.

Advantage of the present utility model is to take up space little, and is easy for installation, and hill climbing ability is strong, and speed is fast, just stepping on and stepping on to hocket to change by bike single posture and center of gravity, with the purpose that reaches relieving fatigue and take exercises.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:

Fig. 1 is the two-way variable speed bicycle schematic diagram that steps.

Among the figure:

1, drive sprocket, 2, chain, 3, the backward in-line gears, 4, just go in-line gears, 5, just go " flying ", 6, backward " flies ", 7, support, 8, guide wheel, 9, the backward wheel shaft.

Principle of work:

Drive sprocket (1) flies (5) with the original just row of bicycle, newly-increased backward flies (6) and constitutes chain-driving by chain (2), when bicycle is just being stepped on, drive sprocket just drives row and flies (5) and just change, the power-transfer clutch that flies in (5) of just going is in engagement state, the in-line gears (4) of just going drive backward in-line gears (3) reversing, and backward flies (6) idle running.Make backward fly (6) power-transfer clutch by chain gear when bicycle is stepped on and be in engagement state, drive in-line gears (3) reversing, in-line gears (4) just change, and just row is flying (5) idle running, thereby bicycle rear axle is just changeed, bicycle still keeps advancing drive, and guide wheel (8) makes chain keep certain tension force and cornerite, and the ratio of number of teeth of two in-line gears changes and the ratio of number of teeth variation of driven sprocket can be adjusted the bicycle speed of a motor vehicle.

Claims

1, a kind of two-way variable speed bicycle that steps, it is characterized in that having a backward " to fly " (6) and bicycle drive sprocket (1), bicycle is just being gone " flying " (5) and is being constituted chain-driving, just going " flying " (5) and backward " flies " (6) and respectively establishes in-line gears (4) and (3), and two gears are meshed.

2, the two-way variable speed bicycle that steps according to claim 1 is characterized in that the outside of two " flying " (5), (6) is provided with guide wheel (8).