CN2173742Y - Up-and-down pedal type bicycle - Google Patents

Abstract

The utility model relates to an up-and-down pedal type bicycle, which has an improvement to a driving device of a bicycle. A left crank and a right crank are fixed on a centre shaft through a one-way ratchet mechanism. A ratchet drives the centre shaft to rotate when the cranks move downwards. The centre shaft is separated from the ratchet when the cranks move upwards. The let crank and the right crank are respectively connected with a four-connecting-rod mechanism, and the two four-connecting-rod mechanisms are connected by a connecting shaft, so that the let crank and the right crank can move in contrary directions. The left crank and the right crank constantly move up and down in the contrary directions to push the centre shaft to constantly rotate so as to drive a bicycle to move forward.

Description

Up-and-down pedal type bicycle

The utility model belongs to human-powered vehicle.

Bicycle is a kind of common manually driven vehicle, is used for short distance and rides, and brings great convenience for people's life.The structure of Regular Bicycle is made up of vehicle frame, front fork, handlebar, front vehicle wheel, saddle, rear wheel, a clothes hanger, brake equipment, driver train.Actuating device comprises pedal, crank wheel disk, axis, chain, flywheel etc., and by the foot-operated rotation of the left and right sides crank 360 deg that axis is installed, the flywheel drive rear wheels that wheel disc is driven on chain and the rear wheel is advanced.

This traditional structure has certain disadvantage, advancing because of bicycle is to step crank rotation 360 deg by the manpower both feet to finish, yet effectively angle out of strength is that 90 degree are to 120 degree event expense merit efforts, especially since by bike the time both legs action need certain activity space greatly, so force bicycle saddle to have to make triangle, and area is greatly limited again, (about 2 sq ms) whole body weight so concentrate on above this, pressure is big well imagines, and people's both legs big-movement activity constantly when riding, constantly bump and friction human body wants harm--perineum part, to cause hypodermis pain, and produce the pathology hyperplasia, this will certainly form chronic redness, the odynuria frequent micturition, disease in the urological systems such as sexual deterioration.This harm for the elderly is particularly serious.

The purpose of this utility model provides and a kind of crank is improved to the bicycle that up and down reciprocatingly scrunches, and solving general bicycle crank needs the 360 deg rotation to scrunch, the Fei Gong effort, and the saddle area is little, causes problems such as disease in the urological system easily.

The utility model pedal-type bicycle is up and down realized according to following technical solution, this car includes vehicle frame, front fork, handlebar, front vehicle wheel, saddle, rear wheel, prop up clothes hanger, brake equipment, these bicycle assembly parts are identical with the structure of Regular Bicycle, the utility model improves actuating device, the left and right sides crank of actuating device is installed on the axis by unidirectional ratchet device, when crank moves downward, crank promotes axis and rotates forward, during the crank upward movement, single direction ratchet is thrown off crank and axis, the people that rides scrunches left and right sides crank up and down, the continuous in the opposite direction up-and-down movement of left and right sides crank, will promote axis and constantly rotate, the hinge wheel that is fixed on the axis drives the flywheel rotation by chain, and trailing wheel rotating drive bicycle is advanced.

For making the relative motion up and down exactly of left and right sides crank, left and right sides crank is connected with a four-bar linkage respectively, two four-bar linkages link together by adapter shaft, when a crank moves downward, two four-bar linkages that link together make another crank upward movement, otherwise also like this, because adopt the method for riding that scrunches up and down, increase backrest in the saddle back, can make and ride laborsaving and the increase traveling comfort.

Owing to adopted above structure, up and down the advantage of pedal-type bicycle for a change the mode that scrunches of bicycle, the 360 deg rotation is scrunched to up and down reciprocatingly scrunching, thereby economize the laborsaving fatigue of especially dwindling both legs of merit, and then slowed down to the damage of perineal position, reach the purpose that reduces disease.

The concrete structure of utility model is drawn by following enforcement and accompanying drawing thereof.

Fig. 1 is a pedal-type bicycle overall diagram up and down, and ［ 1 ］ locates to be the drive part position among Fig. 1, and ［ 2 ］ are located is the backrest that increases behind the saddle, and Fig. 1 also is the specification digest accompanying drawing.The pedal of drive part is stepped on crank and is swung up and down with interior 160 ° of angular regions.

Fig. 2 is right crank structure figure, Fig. 2 is the view of A direction among Fig. 4, the right crank four-bar linkage of ［ 3 ］ right crank ［ 4 ］ single direction ratchet ［ 5 ］ axis ［ 6 ］ ［ 7 ］ adapter shaft ［ 8 ］ hinge wheel among Fig. 2

Solid line is represented the starting position that right crank moves downward among Fig. 2, long and short dash line is represented the final position that moves downward, when right crank ［ 3 ］ rotates axis ［ 5 ］ forward by single direction ratchet ［ 4 ］ when moving downward, also make right crank parallel motion to the long and short dash line position, the angle that the swing of adapter shaft ［ 7 ］ cw is certain.Spingle carrier bar is supporting adapter shaft, and spingle carrier bar is fixed on the back chain stay of vehicle frame with the method for welding.

Single direction ratchet adopts bicycle freewheel, and the flywheel inner core is fixed in the axis, and crank is welded on the Case of fly-wheel.

Fig. 3 is left crank structure figure, and Fig. 3 is the view of B direction among Fig. 4, among Fig. 3, and the left brace and connecting rod framework of ［ 9 ］ left crank ［ 10 ］ ［ 7 ］ adapter shaft ［ 4 ］ single direction ratchet ［ 5 ］ axis ［ 11 ］ chain

When angle of promotion lower swing at right crank of adapter shaft ［ 7 ］, adapter shaft makes left crank upward movement by left crank four-bar linkage, and long and short dash line is represented the reference position of moving, and long and short dash line is represented the final position.Otherwise when moving downward, crank also can make right crank upward movement.

Fig. 4 for the birds-eye view of driver train as can be seen adapter shaft ［ 7 ］ by left and right crank four-bar linkage left and right sides crank connecting link is got up.Left and right sides crank keeps the strict relation that pumps like this.

Claims (4)

1, a kind of pedal-type bicycle up and down, include vehicle frame, front fork, handlebar, front vehicle wheel, saddle, rear wheel, clothes hanger and brake equipment, actuating device, the left and right crank that it is characterized in that actuating device is installed on the axis by single direction ratchet mechanism, left and right crank is connected with a four-bar linkage respectively, and two four-bar linkages link together by adapter shaft.

2, by the described pedal-type bicycle up and down of claim 1, it is characterized in that single direction ratchet adopts bicycle freewheel, the flywheel inner core is fixed on the axis, and crank is welded on the Case of fly-wheel.

3, by the described pedal-type bicycle up and down of claim 1, it is characterized in that the adapter shaft supporting is with being welded on the back chain stay of vehicle frame.

4, by the described pedal-type bicycle up and down of claim 1, it is characterized in that, behind saddle, increase backrest.

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