CN2159934Y - Bicycle front fork with vibration absorption function - Google Patents

Abstract

The utility model relates to a bicycle front fork with vibration absorption function, which comprises a fork lever, an engaging lever and a pneumatic cylinder, wherein, the fork lever is provided with two forked lever bodies. The abutting end of the two lever bodies is extended upwards and is provided with a sleeve. The engaging lever is connected with a lever rack of a handle of a bicycle, and the engaging lever is sheathed outside the sleeve of the fork lever. The pneumatic cylinder is connected and arranged between the engaging lever and the fork lever. Owning to the structure, the effects of buffering and vibration absorption having barometric pressure are formed between the fork lever and the engaging lever. When the bicycle runs in a bumpy road surface, the utility model can effectively resolve and absorb vibration of a front wheel, so a rider is free from vertebral damage caused by counterforce of the vibration.

Description

Bicycle front fork with vibration absorption function

The utility model relates to a kind of in bicycle front fork, particularly relates to a kind of bicycle front fork with vibration-absorbing function.

See also Fig. 1, be that bicycle was constructed in the past, wherein front fork 11 connects handle bridge 12, the pivot of pipe link 13 and front-wheel 14, front fork 11 structures in the past comprise epimere and handle bridge 12 and pipe link 13 bonded assembly junction surfaces 111 and lower end and front-wheel bonded assembly fork 112 substantially, two partly is that one fixedly installs, therefore use and go up front fork part without any the elastic buffer effect, though all be provided with spring installation under the Regular Bicycle seat cushion, provide trailing wheel at the ground-surface buffering effect that jolts, yet effectiveness is still limited, be difficult to extensively reach the place ahead, especially with the bicycle of sport car type, the whole in the use person is significantly to incline to the handlebar stem frame forward, so the buffering effect of front-wheel is more important, shock absorbing device also should be set just more conform with user demand, otherwise tend to cyclist's vertebra be caused direct injury because of the antagonistic force of vibrations.

Based on aforementioned front fork can not shock-absorbing shortcoming, the front fork that vibration-absorbing function is set is also arranged at present, it is a sheathed spring on front fork, yet the elasticity modulus of spring must be in certain numerical value, and at the spring volume of this numerical value, generally all not very little, therefore so being provided with can be just like very thick and heavy as the preceding bar of locomotive, bicycle lightly conveniently be principal feature, so the plain but also heavy inconvenience of outward appearance not only also has the oil pressure of use mode to reach shock-absorbing effect in addition, so low because of the coefficient of expansion of oil pressure mode, be effectively to reach reciprocal action in the space of small size, whole volume is strengthened, produce above-mentioned shortcoming.

Main purpose of the present utility model is to provide a kind of bicycle front fork with vibration-absorbing function, makes to reach the vibration-absorbing function with elastic buffer, also makes front fork keep light and handy structure simultaneously.

The purpose of this utility model reaches as follows:

A kind of bicycle front fork with vibration-absorbing function comprises fork arm, and this fork arm has the body of rod of two bifurcateds, and the lower end of two bodies of rod and bicycle front-wheel pivot are fixed, and the abutting end of two bodies of rod extends upward and is provided with sleeve; Be provided with engaging lever at described bush outer sleeve, this engaging lever is the handle bridge bonded assembly hollow lever with bicycle; Between described sleeve and engaging lever, be arranged with Pneumatic cylinder device, it comprise air cylinder and can be in air cylinder the piston rod of elastic telescopic, this piston rod one end is fixedly connected in the described engaging lever, and air cylinder is fixedly connected in the sleeve of fork arm.

The purpose of this utility model can also following mode reach:

Described bicycle front fork with vibration-absorbing function is characterized in that: the rod end of this Pneumatic cylinder device is provided with external screw thread, and the stage casing is provided with a female threaded hole in the described engaging lever, with the external screw thread engagement of this rod end.

Described bicycle front fork with vibration-absorbing function, it is characterized in that: the air cylinder lower edge of this Pneumatic cylinder device is provided with lug, lug is provided with perforation, also is provided with perforation on the sleeve of fork arm, has a latch to pass the perforation of sleeve and the perforation of air cylinder lower edge lug.

Described bicycle front fork with vibration-absorbing function, it is characterized in that: other parallel second sleeve that is provided with of the sleeve of this fork arm, the second sleeve outer rim is arranged with spring, and parallel being provided with in described engaging lever lower end engages tube, and this joint jacket casing is located at the second sleeve outer rim and is compressed spring.

Described bicycle front fork structure with vibration-absorbing function, it is characterized in that: second sleeve of described fork arm is provided with the alignment sheet, and the central authorities of alignment sheet are provided with tubule, is covered with a lid on the described joint tube, and lid central authorities are provided with perforation.

Below by most preferred embodiment and accompanying drawing the bicycle front fork with vibration-absorbing function of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the External view of bicycle and front fork in the past.

Fig. 2 is the three-dimensional exploded view that the utlity model has the bicycle front fork of vibration-absorbing function.

Fig. 3 is the assembled sectional view that the utlity model has the bicycle front fork of vibration-absorbing function.

Fig. 4 is the block diagram that the bicycle front fork that the utlity model has vibration-absorbing function is assembled in car body.

Seeing also Fig. 2,3, is the preferred embodiment that the utlity model has the bicycle front fork of vibration-absorbing function, and it comprises fork arm 2, engaging lever 3, Pneumatic cylinder device 4, engages tube 51, spring 52, alignment sheet 53 and lid 54.

Fork arm 2 includes the body of rod 23 of first sleeve 21, second sleeve 22 and two bifurcateds, wherein first sleeve 21, second sleeve 22 are all up/down perforation, second sleeve 22 is parallel first sleeve, 21 1 sides of being located at by connecting panel 24, its upper end is provided with external screw thread 221, the hypomere of first sleeve 21 is provided with perforation 211, the body of rod 23 of two bifurcateds welds the both sides of being located at first sleeve 21 respectively, its lower end is provided with connecting portion 231 and makes with the front-wheel pivot of bicycle and fix, its stage casing weldering is provided with registration mast 232, and the brake rubber block of front-wheel can be set.

Engaging lever 3 is hollow levers, and its inner stage casing is provided with dividing plate 31, and dividing plate 31 is provided with female threaded hole 32.

Pneumatic cylinder device 4, its include air cylinder 41 and can be in air cylinder the piston rod 42 of elastic telescopic, wherein air cylinder 41 is to be shaft-like, be provided with suitable air pressure in it, its lower end is provided with lug 411, and lug is provided with perforation 412, and piston rod 42 1 ends are provided with external screw thread 421.

Engage tube 51 parallel welderings and be located at the lower end of engaging lever 3, spring 52 is placed in second sleeve, 22 outer rims of fork arm 2, the central authorities of alignment sheet 53 are provided with a tubule 531, and lid 54 central authorities are provided with perforation 541, make screw lock be placed on the external screw thread 221 of second sleeve, 22 upper ends of fork arm 2 but its lower end is provided with negative thread.

During assembling, earlier external screw thread 421 screw locks of the piston rod 42 of Pneumatic cylinder device 4 are engaged in the female threaded hole 32 in the engaging lever 3; Then spring 52 is placed in second sleeve, 22 outer rims of fork arm 2, engaging lever 3 is placed in outside first sleeve 21 again, the air cylinder 41 of Pneumatic cylinder device 4 is inserted in first sleeve 21, the perforation 211 that first sleeve 21 is aimed in the perforation 412 of the lug of lower end, and pass perforation 412,211 riveted joints with a steel pin 57, engaging tube 51 this moment, to be placed in second sleeve 22 outer and be butted on the spring 52; At last the brake cable 16 of car body front-wheel is passed the tubule 531 of lid 54 and alignment sheet 53 and pass from second sleeve, 22 lower ends; Make alignment sheet 53 place second sleeve, 22 upper ends, lid 54 is placed on to engage on the tube 51 and with second sleeve 22 screws togather.

See also Fig. 4, the utility model is assembled in car body, engaging lever 3 and 12 sockets of handle bridge, two pipe links 13 also weld on it, the pivot of front-wheel is fixed in the body of rod 23 lower ends of two bifurcateds of fork arm, and the brake cable 16 of front-wheel is passed lid 54, alignment sheet 53, and is positioned.

Effect of the present utility model is conspicuous: because Pneumatic cylinder device 4 is connected between engaging lever 3 and the fork arm 2, promote to form the shock-absorbing effect of elastic buffer by air pressure, in addition since second sleeve 22 with engages 51 in tube and more is arranged with the elastic buffer that spring 52 conducts are assisted, so the single-piece shock-absorbing effect is splendid, can bear very big shaking force, when row the utility model when jolting the road surface can effectively be dissolved the vibrations of front-wheel, make bicycle more smooth and easy comfortable, and the injury that is shaken when avoiding forward lean, when track is not to jolt very much, spring 52 can be taken out, so use upward unlikely too strong in elastic force, comparatively suitable, spring 52 is property and installing additional optionally fully; The brake cable 16 of front-wheel can be passed the tubule 531 of lid 54 and alignment sheet and be passed from second sleeve, 22 lower ends in addition, can be by suitable location configuration.

In sum, the bicycle front fork that the utlity model has vibration-absorbing function can reach the effect and the purpose of expection really.

Claims (5)

1, a kind of bicycle front fork with vibration-absorbing function comprises fork arm, and this fork arm has the body of rod of two bifurcateds, and the lower end of two bodies of rod and bicycle front-wheel pivot are fixed, and the abutting end of two bodies of rod extends upward and is provided with sleeve; It is characterized in that: be provided with engaging lever at described bush outer sleeve, this engaging lever is the handle bridge bonded assembly hollow lever with bicycle; Between described sleeve and engaging lever, be arranged with Pneumatic cylinder device, it comprise air cylinder and can be in air cylinder the piston rod of elastic telescopic, this piston rod one end is fixedly connected in the described engaging lever, and air cylinder is fixedly connected in the sleeve of fork arm.

2, the bicycle front fork with vibration-absorbing function as claimed in claim 1, it is characterized in that: the rod end of this Pneumatic cylinder device is provided with external screw thread, and the stage casing is provided with a female threaded hole in the described engaging lever, with the external screw thread engagement of this rod end.

3, the bicycle front fork with vibration-absorbing function as claimed in claim 1 or 2 is characterized in that; The air cylinder lower edge of this Pneumatic cylinder device is provided with lug, and lug is provided with perforation, also is provided with perforation on the sleeve of fork arm, has a latch to pass the perforation of sleeve and the perforation of air cylinder lower edge lug.

4, the bicycle front fork with vibration-absorbing function as claimed in claim 3, it is characterized in that: other parallel second sleeve that is provided with of the sleeve of this fork arm, the second sleeve outer rim is arranged with spring, parallel being provided with in described engaging lever lower end engages tube, and this joint jacket casing is located at the second sleeve outer rim and is compressed spring.

5, the bicycle front fork structure with vibration-absorbing function as claimed in claim 4, it is characterized in that: second sleeve of described fork arm is provided with decides embolium, and the central authorities that decide embolium are provided with tubule, is covered with a lid on the described joint tube, and lid central authorities are provided with perforation.

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