CN2202088Y

CN2202088Y - Bicycle

Info

Publication number: CN2202088Y
Application number: CN 94241458
Authority: CN
Inventors: 王振东
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-06
Filing date: 1994-10-06
Publication date: 1995-06-28
Anticipated expiration: 2004-10-06

Abstract

The utility model relates to a bicycle, belonging to the technical field of a cycle, and mainly overcoming the problems of big resistance, easy fatigue for people which is caused by the only utilization of the power of thighs as dynamic force in riding, low speed, etc. The utility model is characterized in that the diameter of a front wheel is equivalent to or smaller than the diameter of a rear wheel, a crank shaft is arranged on the front part of a bottom beam, and a tilting backrest chair which is provided with a shoulder rack and a head support is arranged on the bottom beam and a stand beam. For the bicycle can utilize effectively the power of other parts of a human body as dynamic force, the utility model has the advantages of high speed, uneasy fatigue in riding, comfortable riding, little resistance, etc. The utility model can replace existing cycles generally.

Description

Bicycle

The utility model is a kind of Bicycle, and it belongs to technical field of bicycles.

Current bicycle all is that the people is sitting on the saddle of bicycle, and upper body is upright, steps crank throw with foot, and car is advanced.There are some shortcomings in this car, and first resistance is bigger; Second only can utilize leg power to step crank throw or stand up steps crank throw by gravity, can not utilize other position strength of health well, thereby make the fatigue of people's susceptible, firmly little, has limited road speed; The 3rd, center of gravity is higher in the time of by bike, and stability is bad, poor stability; The 4th because saddle is less, ride sit uncomfortable.

Exactly it is comfortable that the purpose of this utility model designs a kind of riding safety, except that utilizing leg power, can also effectively utilize the strength at other positions of health, Zong power is big, riding speed is fast, and the resistance new car little than bicycle.

The utility model is achieved in that it still has front and back wheel, handlebar, vehicle frame, big or small chain wheel driving mechanism, shelf parts, and its improvements are: the back wheel diameter is more than or equal to preceding wheel diameter; Vehicle frame is for there being the bottom girder that extends backward in the lower end of front fork sleeve pipe, be welded with the support beam between bottom girder and front fork sleeve pipe, the bottom girder rear portion is bent into upright beam to the back upper place, upright beam and ground level-80 ° of angles at 45, the Li Liang bottom is welded with down back vent, Li Liang top is welded with oblique back vent, goes up oblique back vent and is welding or riveting near the trailing wheel centre so that trailing wheel is installed with following back vent; Its crank shaft is positioned at the front portion of bottom girder; On upright beam and bottom girder the seat that has the backrest that recedes is housed, respectively there is a shoulder frame at the two ends, the left and right sides, top of seat, and there is head rest two middle tops of shoulder frame.

It is 2.33 times of preceding wheel diameter that this Bicycle can be made the back wheel diameter, and upright beam becomes 60 ° of angles with ground level.

Because this Bicycle seat height is significantly less than the saddle height of former bicycle,, use also relatively safety so center of gravity is low, more stable when riding.Because seat has the hypsokinesis backrest, the shoulder frame is arranged on the seat again, firmly pedal crank throw when leg when riding, make the person press to backrest and shoulder frame, backrest and shoulder frame have a reaction force acts in the back of the body and shoulder like this, and act on crank throw by health.In addition, when when driving hand when grasping direction, hand also acts on crank throw by human body to the antagonistic force to the pulling force of back upper place of handlebar.The power that has acted on crank throw like this also has back strength, shoulder power, pulls power except that leg strength, have only leg strength much bigger than the power that bicycle acts on the crank throw.Shi Rencheng half backstroke of in addition riding, the resistance that is subjected to is also less, so this Bicycle is fast than cycling speed, be difficult for tired, comfortable safety.

Fig. 1 is a scheme drawing of the present utility model;

Fig. 2 is that K of the present utility model is to view;

Below in conjunction with accompanying drawing the utility model is described in detail.

Wheel diameter is 12 inch before the bicycle shown in the drawings, and back wheel diameter is 28 inch.The top of bevelled front fork sleeve pipe 1 is handlebar as can be seen from Figure 1, and bottom girder 2 is backward arranged at the bottom, and 2 of front fork sleeve pipe 1 and bottom girders are welded with support beam 12.The rear portion of bottom girder 2 is bent into upright beam 3 to the back upper place, on upright beam 3 and bottom girder 2 seat mounted thereto 4 is arranged.The two ends, the left and right sides, top of seat 4 respectively have 5, two shoulders of shoulder frame prominent before frame, 5 middle tops that head rest 6 is arranged as can be seen from Figure 2.As can be seen from Figure 1 the top of upright beam 3 have weldering thereon on oblique back vent 7, be welded with back vent 8 down in upright beam 3 bottoms, go up oblique back vent and following back vent respectively at the right and left near the welding of trailing wheel center adorn trailing wheel so that press.Front end at bottom girder is equipped with crank shaft 9, and crank shaft the right and left is equipped with crank throw.Other structures are identical with bicycle.

The people faces upward and is sitting on the seat 4 when riding, the back of the body and shoulder and backrest and shoulder frame are close to, head can be placed on the head rest, stretch out the oblique forward below of leg, step crank throw, at this moment the hinge wheel on the crank shaft rotates, the minor sprocket after driving by chain 10 on the flying wheel, drive trailing wheel by flywheel and rotate, promote front-wheel car is advanced.

Claims

1, a kind of Bicycle, it has front and back wheel, handlebar, vehicle frame, big or small chain wheel driving mechanism, shelf parts, it is characterized in that:

A) the back wheel diameter is more than or equal to preceding wheel diameter;

B) vehicle frame is for there being the bottom girder that extends backward in the lower end of front fork sleeve pipe, be welded with the support beam between bottom girder and front fork sleeve pipe, the bottom girder rear portion is bent into upright beam to the back upper place, upright beam and ground level-80 ° of angles at 45, the Li Liang bottom is welded with down back vent, Li Liang top is welded with oblique back vent, goes up oblique back vent and following back vent and is welding or riveted joint near the trailing wheel centre;

C) crank shaft is positioned at the front portion of bottom girder;

D) on bottom girder and upright beam the seat that has the backrest that recedes is housed, respectively there is a shoulder frame at two ends, the left and right sides, seat top, and there is head rest two middle tops of shoulder frame.

2, Bicycle according to claim 1 is characterized in that: the back wheel diameter is 2.33 times of preceding wheel diameter, and upright beam becomes 60 ° of angles with ground level.