CN2246110Y

CN2246110Y - Collision-proof and shock-reducing front fork of man-power pedal cycle

Info

Publication number: CN2246110Y
Application number: CN 95216751
Authority: CN
Inventors: 马文亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-19
Filing date: 1995-07-19
Publication date: 1997-01-29
Anticipated expiration: 2005-07-19

Abstract

The utility model relates to a collision-proof and shock-reducing front fork of a man-power pedal bicycle. The front fork is provide with a front fork leg extending downwards and an upper supporting fork extending upwards; the upper and the lower head ends of two front forks are respectively integrated with two safety forks; the two front forks are connected by a connecting plate which is connected with an upright post of a handle bar via a spring; a set of central shafts in a fork shoulder pass through the middle parts of the two front forks; a fork tube extends out of the middle part of the fork shoulder, and is connected with the upright post of the handle bar. When a front wheel is impacted, the front fork can oscillate forwards and backwards around a shaft core of a central shaft to play the functions of collision prevention and shock absorption.

Description

The crashproof damping safety of manpower bicycle front fork

The utility model relates to a kind of manpower bicycle's front fork, particularly a kind of front fork that can crashproof damping.

Traditional manpower bicycle's front fork is that fork leg, fork shoulder, breeches pipe are welded as a whole, in the motion process of car, and as the road injustice, owing to do not have shock-absorbing function, and car body meeting severe turbulence, then travelling of car will be unstable, and it is very tired that the cyclist also can feel.Once wheel when bumping against the front object, because front fork does not have crashproof effect, will cause that front-wheel distortion, crossbeam arch upward, and particularly easily wound the cyclist.

The purpose of this utility model is manpower bicycle's front fork that will provide a kind of safety performance high, and it can play the crash-proof effect of damping when car travels on uneven road or bumps against the front object.

The purpose of this utility model is achieved in that a kind of manpower bicycle's a pair of front fork, and the part that this front fork extends downwards is a fork blade, and upwardly extending part is the upper support fork, and the two ends of fork blade and upper support fork is all to the bending of car the place ahead.Two front forks are connected into one with two fork guards respectively, fuse at two front forks that the top of front fork will have fork guard by a gusset piece.Be respectively equipped with two concentric circular holes in the position, upper middle of two front forks, the all screwed center shaft in one two ends passes two circular holes, center shaft is provided with two ends and has externally threaded sleeve, its length equals the width between two front forks, one fork shoulder is placed on the sleeve, a breeches pipe that connects with the handlebar column is stretched out at middle part at the fork shoulder, the lower surface of this breeches pipe is outwards dug and is resisted against on the fork shoulder outer wall, have on the breeches pipe and the same diameter of sleeve excircle, and concentric circular hole, sleeve passes breeches pipe from this circular hole, breeches pipe is the cylindrical of hollow, and reinforced pipe is arranged at the bottom in it.Be provided with two nylined bearings between fork shoulder and sleeve, an end of this bearing is resisted against respectively on the breeches pipe outer wall, and the other end is locked by jam nut.Two front forks are set on the center shaft by means of the nut at two ends.One end and the gusset piece of one spring link, and the other end is fixed on the handlebar column by spring clamp.Be connected with between two front forks and two fork guards and turn round anti-bent plate, the lower end of two front forks is a flats, has elongated slot on it.

The utility model is owing to be the front fork that traditional fork blade, fork shoulder, breeches pipe are welded as a whole, being improved to front fork bumps against at wheel and object, can pitch the structure of shoulder, breeches pipe swing when road jolts relatively, its installation method is similar to common front fork mounting means, so easy to implement.The utility model also has simple in structure, and product is light and handy, the advantage that safety is attractive in appearance, and be applicable to various manpower bicycles, and as: bicycle, three-wheel vehicle, light motorcycle etc.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the scheme of installation according to the crashproof damping safety of the manpower bicycle front fork that the utility model proposes;

Fig. 2 has the parts block diagram of pitching shoulder according to the safe front fork that the utility model proposes;

Fig. 3 is the block diagram according to the safe front fork that the utility model proposes;

Fig. 4 is the lateral plan of Fig. 2;

Fig. 5 is the partial enlarged drawing at I place among Fig. 4;

Fig. 6 is along the section-drawing of A-A line among Fig. 4;

Fig. 7 is along the section-drawing of B-B line among Fig. 4;

Fig. 8 is the spring scheme of installation according to the safe front fork that the utility model proposes.

Below in conjunction with accompanying drawing the crashproof damping safety of the manpower bicycle who the utility model proposes front fork is further described.

A kind of manpower bicycle's a pair of front fork 1, the part that this front fork 1 extends downwards is a fork blade 5, and upwardly extending part is a upper support fork 3, and the two ends of fork blade 5 and upper support fork 3 is all to the bending of car the place ahead.Two front forks 1 are connected into one with two fork guards 6 respectively, and two front forks 1 that will have fork guard 6 by a gusset piece 2 on the top of front fork fuse.Be respectively equipped with two concentric and circular holes 9 that its axis is parallel with the front truck wheel shaft in the position, upper middle of two front forks 1, the all screwed center shaft 10 in one two ends passes two circular holes 9, center shaft 10 is provided with two ends and has externally threaded sleeve 18, its length equals the width of 1 of two front fork, one fork shoulder 7 is placed on the sleeve 16, a breeches pipe 14 that connects with the handlebar column is stretched out at middle part at fork shoulder 7, the lower surface of this breeches pipe 14 is outwards dug and is resisted against on the outer wall of fork shoulder 7, have on the breeches pipe 14 and the same diameter of sleeve 16 excircles, and concentric circular hole, sleeve 16 passes breeches pipe 14 from this circular hole, breeches pipe 14 is the cylindrical of hollow, and reinforced pipe 15 is arranged at the bottom in it.Be provided with two nylined bearings 13 between fork shoulder 7 and the sleeve 16, an end of this bearing 13 is resisted against respectively on the outer wall of breeches pipe 14, and the other end is by jam nut 12 lockings.Two front forks 1 are set on the center shaft 10 by means of the nut 11 at two ends.One end of one spring 20 links with gusset piece 2 by bolt 18, nut 19, and the other end is fixed on the handlebar column by spring clamp 21, bolt 22, nut 23.The lower end that is connected with anti-twisted board 4, two front forks 1 between two front forks 1 and two fork guards 6 is a flats, has elongated slot on it.

Shown in Fig. 1 to 8, above-mentioned assembling all-in-one-piece front fork lower end elongated slot is inserted the front truck wheel shaft, by known method itself and front truck wheel shaft are fixed, breeches pipe 14 links with known method and handlebar column, one end of spring 20 links to each other with gusset piece 2 by bolt 18, nut 19, the other end is connected with spring clamp 21 by nut, and spring clamp 21 is fixed on the handlebar column by bolt 22, nut 23.In the motion process of car, when meeting the road that jolts or front-wheel and being impacted, front vehicle wheel will be by front fork 1 swing, promptly when the suffered impulsive force of wheel is delivered to the lower end of front fork 1, front fork 1 will be around the swing of the axle center of center shaft 10, simultaneously spring 20 is stretched or compressed, and reducing the suffered impulsive force of front vehicle wheel, thereby plays crashproof cushioning effect.Described front fork 1, fork guard 6 all can be made by habitual section bar.

Claims

1, the crashproof damping safety of a kind of manpower bicycle front fork, it is characterized in that: this front fork has the fork blade and the upwardly extending upper support fork of downward extension, the two ends of fork blade and upper support fork is all to the bending of car the place ahead, two front forks are connected into one with two fork guards respectively, fuse at two front forks that the top of front fork will have fork guard by a gusset piece, be respectively equipped with two concentric circular holes in the position, upper middle of two front forks, the all screwed center shaft in one two ends passes two circular holes, center shaft is provided with two ends and has externally threaded sleeve, on the one fork shoulder cover sub-sleeve, a breeches pipe that connects with the handlebar column is stretched out at middle part at the fork shoulder, the lower surface of this breeches pipe is outwards dug and is resisted against on the fork shoulder outer wall, have on the breeches pipe and the same diameter of sleeve excircle, and concentric circular hole, sleeve passes breeches pipe from this circular hole, breeches pipe is the cylindrical of hollow, reinforced pipe is arranged at the bottom in it, be provided with two nylined bearings between fork shoulder and sleeve, one end of this bearing is resisted against respectively on the breeches pipe outer wall, the other end is locked by jam nut, two front forks are set on the center shaft by means of the nut at two ends, one end of one spring links to each other with gusset piece, and the other end is fixed on the handlebar column.

2, the crashproof damping safety of manpower bicycle according to claim 1 front fork is characterized in that: be connected with anti-twisted board between two front forks and two fork guards.

3, the crashproof damping safety of manpower bicycle according to claim 1 front fork is characterized in that: an end of spring links to each other with gusset piece by bolt, nut, and the other end is fixed on the handlebar column by spring clamp.