CN2280655Y

CN2280655Y - Seating type bicycle

Info

Publication number: CN2280655Y
Application number: CN 96214602
Authority: CN
Inventors: 杨劲松
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-07
Filing date: 1996-06-07
Publication date: 1998-05-06
Anticipated expiration: 2006-06-07

Abstract

The utility model relates to a bicycle with a backrest and a chair. A pedal crank assembly is positioned between two wheels. A chair is backwards leaned 20-30 cm compared with a common riding type bicycle relative to the position of the pedal crank assembly; meanwhile, the chair is 15-25 cm lower than the position the pedal crank assembly, and thereby, a force application direction of a rider is a front-lower side when the rider pedals. A single bend steel pipe is adopted by the bicycle with a backrest and a chair to be used as a bicycle beam. A bicycle handle is a backswept type high handle. The bicycle with a backrest and a chair has the advantages of low gravity center, safety, comfort, and labour saving. The bicycle with a backrest and a chair is suitable for riding in a long distance and riding in a downtown.

Description

Chair bicycle

The utility model relates to a kind of bicycle that has the backrest seat.

Existing riding type bicycle when the position of design pedal crank assembly all is between two-wheeled, axis arrives the distance of front axle less than axis to the distance of rear axle, the bicycle saddle front end is positioned at the top of axis, thigh was parallel in ground level when saddle concerned that with this position of pedal crank assembly making the cyclist scrunch has an effect, shank is perpendicular to the ground, and there is following several respects defective in this design:

The one, the shank work done is unreasonable, the cyclist in fact be with thigh drive shank down presser feet pedal crank, be positioned at the quadriceps muscle of thigh of thigh front side when having an effect and be positioned at the biceps muscle of thigh while anxiety of thigh rear side, the mutual obstruction, thereby produce power in-fighting, make the cyclist be easy to generate fatigue, simultaneously also for giving full play of the strength of the most flourishing quadriceps muscle of thigh of human body shank.

The 2nd, consider that the leg curvature degree can not be excessive when the cyclist scrunched, even if thereby wheel diameter very little, it is higher that vehicle seat can not design-calculated be crossed low thereby cyclist's center of gravity.The higher insecurity that can increase the cyclist of center of gravity is particularly for beginner and old man.And increase frontal resistance.

The 3rd, this design is restricted the shape of vehicle seat, and in order not hinder the thigh up-and-down movement, bicycle saddle can only be designed to beloid triangular shape, makes the cyclist uncomfortable.

About chair bicycle, several disclosed design plans have been arranged, but have not all been adopted widely, reason have following some:

The one, it is not novel to design, and moulding is succinct inadequately, looks more similarly be the riding type bicycle of loading onto chair.

The 2nd, the chair bicycle parts that have are too many, manufacture to be not easy.

The 3rd, the chair bicycle that has is impracticable, and is all right as sports bicycle, but just seems practical inadequately as daily ordinary people with car.

More than defective in 3 designs hinder popularizing of chair bicycle and development.

The purpose of this utility model is that will to design a kind of center of gravity lower, scrunch laborsaving, the chair bicycle of comfortable practicality and easy manufacturing simple in structure.

The purpose of this utility model realizes by following two kinds of means:

The one, the position that changes pedal crank assembly and vehicle seat concerns, the angle of inclination of standpipe and ground level before at first increasing, suitably dwindle simultaneously preceding wheel diameter, thereby vacateing certain space makes pedal crank assembly than common riding type bicycle reach 10-20CM, next cancels saddle, replace the car chair of band backrest, the car chair moves 10-20CM after suitably and reduces the height of 10-25CM, make vehicle seats be positioned at about 45 ° position, axis back upper place, the direction of having an effect when at this moment the cyclist scrunches and ground level angle are 30-50 °, by the antagonistic force of car chair back, cyclist's the quadriceps muscle of thigh and the strength of gluteus maximus just can be given full play of, and can make the power that scrunches increase 30-50%.

The 2nd, the structure of simplification vehicle frame, adopt the square steel pipe that a front portion is convexly curved, the rear portion is straight to make the car beam downwards, the preceding standpipe of bicycle, back vehicle frame and vehicle seat all by direct organization on this root car beam, thereby simplified the structure of bicycle greatly, it is very easy that bicycle is manufactured, and fastness increases.

Chair bicycle of the present utility model has the following advantages by comparison with common riding type bicycle:

The one, the shank work done is more reasonable.

The 2nd, reduced cyclist's center of gravity, increased cyclist's safety, reduced frontal resistance simultaneously.

The 3rd, simple in structure, manufacture easily, cost is low.

The 4th, increased the traveling comfort of riding.

Describe the concrete structure of chair bicycle of the present utility model in detail below in conjunction with accompanying drawing.

Figure one is the lateral plan of the utility model car load.

Figure two is a car chair scheme of installation of the present utility model.

Describe the integral structure of the utility model chair bicycle in detail below in conjunction with figure one.

The utility model bicycle comprises front-wheel (1), preceding standpipe (2), handlebar (3), car beam (4), axis (5), foot-operated crank assembly (6), blockchain (7), trailing wheel (8), post-tensioning fork (9), rear stays (10), fall visor (11), car chair (12), the reinforcement of car chair (13), binding bolt (14)

Car beam (4) is a square steel pipe, and forebody is convexly curved downwards, and is latter half of straight.Preceding standpipe (2) is welded knot on the preceding top of Che Liang (4), and the angle of cut of preceding standpipe and ground level is between 40-55 °, and the diameter of front-wheel (1) is no more than 50CM simultaneously, and the result who does like this can make pedal crank assembly (6) reach 10-20CM.Pedal crank assembly (6) is installed in car beam (4) curve, and the ratio of axis to the distance of front axle and axis to the distance of rear axle is between 0.6-0.8.Post-tensioning fork (9) keeps level with ground level, and front end is finished on Che Liang (4) by weldering.Length is in the scope of the diameter ± 20CM of trailing wheel (8), and rear stays (10) is the plane vertically, and knot is welded on Che Liang (4) in the upper end, and length is trailing wheel (8) radius+(5-10CM).

Handlebar (3) is high of swept-back, because the handlebar position is higher, can install down visor (11) easily.Car chair (12) is a chair, is installed in the front upper place of trailing wheel.

Describe the shape and the mounting means of car chair (12) in detail below in conjunction with figure two.

Car chair (12) forms with nylon or plastic cement compression, be shaped as chair, and reach the reinforcement (13) that there are two parallel evaginations the backrest back below vehicle seat, two corresponding holes are respectively arranged on the reinforcement, the distance between two reinforcements (13) equals the width of car beam (4).When car chair (12) is installed, the gap alignment car beam (4) between the reinforcement (13) of seat (12) back need only be pressed on car chair (12) on the car beam (4) from top to bottom, with binding bolt (14) it is fastened on the car beam (4) and just can.The position of car chair (12) can be along car beam (4) fore-and-aft adjustment.

Claims

One, a kind of chair bicycle, by wheel (1), preceding standpipe (2), handlebar (4), axis (5), crank assembly (6), blockchain (7), trailing wheel (8), post-tensioning fork (9), rear stays (10) is visor (11), car chair (12), the reinforcement of car chair (13), binding bolt (14) is formed, and its feature is as follows:

The diameter of front-wheel (1) is no more than 50CM; Car beam (4) is a square steel pipe, and car beam front portion is convexly curved downwards, and the rear portion is straight; Preceding standpipe (2) is welded knot on the preceding top of Che Liang (4), and the angle of cut of preceding standpipe (2) and ground level is between the 40-55 degree; Foot-operated crank assembly (6) is installed in car beam (4) front curvature place, and the ratio of axis (5) to the distance of front axle and axis (5) to the distance of rear axle is between 0.6-0.8; Post-tensioning fork (9) and ground level keeping parallelism, its front end is welded knot on Che Liang (4), its length at trailing wheel (8) diameter-20CM between trailing wheel (8) diameter+20CM; It is vertical that rear stays (10) and ground level keep, and its upper end is tied on Che Liang (4) by weldering, and its length is the CM of trailing wheel (8) radius+(5-10); Car chair (12) is the chair of band reinforcement (13), is installed in the straight portion of the car beam (4) of trailing wheel front upper place, but its fore-and-aft adjustment; Handlebar (3) is high of swept-back, and two visors (11) are housed on the handlebar.
Two, bicycle according to claim 1 is characterized in that in described car beam: anterior curved being bent downwardly of car beam (4), the rear portion is straight.
Three, according to claim 1,2 described bicycles is characterized in that in described car chair: car chair (12) is the chair of band reinforcement (13), and car chair (12) is fastened on car beam (4) rear portion straight portion by bolt (14).
Four, according to claim 1,2,3 described bicycles is characterized in that in the relative position of described car chair (12) and axis: car chair (12) is in the back upper place of axis, and the angle of the on line ground level of car chair (12) front end center-point and axis is 35 to 55 degree.