CN1751953A - Bicycle having rear suspension shock absorber - Google Patents

Abstract

A bicycle with the vibration-damping back suspension is disclosed. Its vibration damper is a buffer design without sag setting. Its advantages are low loss of pedal energy, low kickback, low braking affection, and high comfortableness.

Description

Bicycle with rear suspension avoiding vibration

Technical field

The invention relates to a kind of bicycle, be meant a kind of bicycle especially with rear suspension avoiding vibration.

Background technology

The cycle frame that generally has incabloc function, to influence that pedal that shock-absorbing start, shock-absorbing start smooth degree (comfort level), shock-absorbing start cause recalcitrates (be Kickback: during the shock-absorbing start to its performance figure in order to trample degradation of energy, brake, the chain length variations causes crank and pedal to be subjected to the strength that stretches backward, causes the uncomfortable sensation of rider).

Wherein, brake influences the start phenomenon of Shock absorber:

Before brake, as shown in Figure 1:

∑M _PF＝0

F _R×(a+b)＝mg×b

$F_R=\frac{b}{a+b}\mathrm{mg}$

When brake in the back, as shown in Figure 2:

∑F _X＝0，ma＝F _R’×μ

∑M _PF＝0

ma×h+F _R’×(a+b)＝mg×b

F _R’×μ×h+F _R’×(a+b)＝mg×b

$F_R\text{'}=\frac{b}{a+b+\mathrm{\μ}\×h}\mathrm{mg}$

Force action line angle degree, as shown in Figure 3:

$\tan \mathrm{\θ}=\frac{F_R-{F_R}^{\′}}{{F_R}^{\′}\×\mathrm{\μ}}$

$\tan \mathrm{\θ}=\frac{\frac{b}{a+b}\×\mathrm{mg}-\frac{b}{a+b+\mathrm{\μ}\×h}\×\mathrm{mg}}{\frac{b\×\mathrm{\μ}}{a+b+\mathrm{\μ}\×h}\×\mathrm{mg}}$

$\tan \mathrm{\θ}=\frac{\frac{a+b+\mathrm{\μ}\×h-a-b}{(a+b)\×(a+b+\mathrm{\μ}\×h)}}{\frac{\mathrm{\μ}}{a+b+\mathrm{\μ}\×h}}$

$\tan \mathrm{\θ}=\frac{h}{a+b}$

$\tan \mathrm{\θ}=\frac{h}{\mathrm{wb}\left(\mathrm{wheel\; base}\right)}$

General situation, h approximates wb, and hence one can see that, about 45 ° ± 5 ° of this force action line and horizontal angle.

To the rear suspension system is single rocking arm or trailing wheel ditch pawl when being connected on the four-bar linkage that lower fork and lower fork and preceding spider body join with single rotating shaft, and the main turning point major part of rear suspension system drops near the force action line, and Shock absorber is difficult for being affected during the brake of back.

For other four-bar linkages, must consider the position of Vee formation support body with respect to the instantaneous center (Instant Center) of preceding spider body.This instantaneous center is positioned at the intersection point of turning point line and boxed rod turning point line before and after lower fork or the lower link, and it is just few more that instantaneous center influences the start of Shock absorber near the force action line more.

No sag setting is for to impose a precompressed at Shock absorber, and this precompressed is similar to the pressure that rider's body weight is bestowed Shock absorber, and Shock absorber can not compress when reaching vehicle frame and being subjected to the rider to be sitting in power on the seat cushion.

Weight transfer effect refers to the rider and sits with stance and cause moving of center of gravity, causes the strength situation of difference to some extent of bestowing Shock absorber.Generally speaking, the parallel motion of the sitting posture and the center of gravity that causes of standing, then center of gravity changes to some extent for the length of the arm of force of Shock absorber turning point, cause the change of Shock absorber amount of compression, in addition, except center of gravity can move up and down, pin also can application of force inequality for pedal when trampling, all can cause the change of Shock absorber amount of compression, thereby cause the loss of trampling energy.

And single rocking arm (Cantilever) mechanism of the normal application of shock-absorbing vehicle frame, No. 4039200 case of US Patent for example, it tramples the degradation of energy minimizing in order to make, mostly the main turning point of a Vee formation support body with respect to a preceding triangle vehicle frame designed near preceding fluted disc group and chain joint (if preceding fluted disc group is the three-chip type fluted disc, during then main turning point is located between sheet and the small pieces with the chain joint, if preceding fluted disc group is the two-chip type fluted disc, then main turning point is located at small pieces and chain joint, if preceding fluted disc group is the one chip fluted disc, then main turning point is located at this sheet fluted disc and chain joint).The method can reduce really tramples degradation of energy, but can cause bigger pedal to recalcitrate, especially more obvious on the shock-absorbing vehicle frame of long travel.In order to reduce the phenomenon that pedal recalcitrates, main turning point height must be reduced, but the loss of trampling energy can be increased again thus, can't make the best of both worlds.Under this system, when the rider stands when trampling, Shock absorber changes compressive state along with rider's application of force size, so can't reduce the degradation of energy of standing and trampling.

Also all there is similar problem in existing rear suspension system, wherein:

The rear suspension system of No. 5899480 case of US Patent is mat one four-bar linkage, quite approaching because of colluding near two turning points of pawl, cause centre of gration (the Virtual Pivot Point of its trailing wheel centrode, be called for short VPP) about the side after a while of lower fork front end pivotal point, therefore there is not too big-difference with aforementioned single rocker arm body, trample degradation of energy and pedal and recalcitrate the high and low position that formative factor is decided by lower fork front end pivotal point, still can't make the best of both worlds.And the force action line when its trailing wheel center is lower than the trailing wheel brake with respect to the instantaneous center of preceding triangle, during the brake of operation back, this rear shock absorber that can stretch with joint efforts, and it is obvious to influence the start situation of Shock absorber.In addition, cross-country race bicycle based on this patent, also can add a particular design Shock absorber, aforementioned Shock absorber is any moment to be locking condition, to reduce degradation of energy, when running into large impact, then utilize this impact power to open this Shock absorber valve and start obtains shock-proof effect, only this kind makes up it and drive the traveling comfort deficiency when Shock absorber locks, and brings the user discomfort greatly especially when Shock absorber begins the preceding large impact of start.

US Patent the 6386568th B1 case, the centre of gration of its trailing wheel centrode (VPP) position is quite high, make any situation stampede power all produce stretching action to Shock absorber, cause stampede power to be stretching action for Shock absorber, only when the tensile force that impulsive force is subjected to greater than Shock absorber, just can make the Shock absorber start, Shock absorber can't absorb less impact when in other words trampling, cause the human discomfort when trampling based on said circumstances, set under (No Sag Setting) in no amount of compression, really can solve the problem of degradation of energy, but No Sag is Setting, also cause the not good shortcoming of comfort level, and thereafter the triangle support body with respect to the instantaneous center position of preceding spider body in remote the place ahead, serious stretching Shock absorber in the time of can causing the back brake, make the Shock absorber start be difficult for, cause the comfort level of this moment extremely low, the result of the Shock absorber that seriously stretches in addition also makes the Shock absorber life-span shorten.

No. 5553881 case of US Patent, the 6206397th B1 case and the 6488301st B2 case also are to use four-bar linkage, thereafter taking turns track is the S curve, and lower semisection is protruding in large fluted disc, chain tension can pull to trailing wheel certain point when trampling, reach the effect of locking shockproof mechanism, if take turns the center after when this point of design is measured for normal Sag, just can reduce and trample degradation of energy.But trailing wheel is subjected to ground shock simultaneously when trampling, and then because of being subjected to pining down of chain tension, ground shock can't effectively be absorbed by Shock absorber, will influence the shock-absorbing traveling comfort.When trampling when standing, weight transfer effect makes the trailing wheel center depart from optimization point more, cause this suspension system also can't actv. to reduce degradation of energy when trampling, the RC variable quantity is also quite big in addition, and it is serious to cause the pedal of this patent to recalcitrate situation.

Summary of the invention

Therefore, the present invention's purpose, though promptly provide a kind of reduce trample that degradation of energy also can significantly reduce degradation of energy under the minimum state that drives of standing, the influence of will braking reduce minimum, can reduce pedal and recalcitrate, can avoid Shock absorber to produce the bicycle with rear suspension avoiding vibration of damage.

General bicycle with back shock-absorbing, do not had the Shock absorber of no sag setting, and the design of its vehicle frame is also because of the different differences to some extent of demand, the present invention mainly develops research based on above-mentioned purpose, and the contradiction of solution traveling comfort and degradation of energy obtains the rear suspension avoiding vibration bicycle system that both have concurrently.

The present invention takes up from the vehicle frame aspect after studying through discretion, and the Shock absorber of the particular design of arranging in pairs or groups, and via both working in coordination, and reaches above-mentioned purpose.

So the present invention has the bicycle of rear suspension avoiding vibration, it is spider body before comprising, one be located at this preceding spider body one the place ahead to front-wheel, one group be located at this preceding spider body one rear to trailing wheel and organize the rear suspension system that is located between this preceding spider body and this trailing wheel towards a rear to extension, should have a vehicle head tube by preceding spider body, a pair of seat pipe that should vehicle head tube, one is connected the five-way axle that this vehicle head tube and following pipe and between this pipe are connected this pipe one bottom and are connected with this time pipe, it is that initial point and level ground angle are in 45 ° ± 5 ° scopes that the Vee formation of this rear suspension system is taken turns touchdown point afterwards to the instantaneous center of preceding triangle pendulum, and VPP is near the tangent line of trailing wheel center and fluted disc formation or on the tangent line, the stampede power that makes the rider be sitting on the seat cushion to be applied is reduced to minimum to the stretching action of a Shock absorber generation, and this Shock absorber is set in no amount of compression under (no sag setting), sensitive and the minimizing degradation of energy of Shock absorber start when trampling, and the pressure fluid of this Shock absorber is flowed towards one second grease chamber by one first grease chamber, and a piston marches to a second place by a primary importance, be to produce throttling in this primary importance, pressure fluid is flowed towards this first grease chamber by this second grease chamber, and this piston marches to this primary importance by this second place, also is to produce throttling in this primary importance.

By this, in order to make this system reach the most comfortableization, this Shock absorber has no amount of compression to be set (no sagsetting) and sets and avoid the Shock absorber travel compression on earth and the function of damaging, and can take into account to reduce to adopt and step on degradation of energy, pedal recalcitrates and reduce influence to Shock absorber.

Description of drawings

About addressing other technologies content, characteristics and effect before the present invention, in the following detailed description that cooperates with reference to one of a graphic preferred embodiment, can clearly present.

Fig. 1 is that the preceding application force of brake produces scheme drawing behind the existing shock-absorbing vehicle frame;

Fig. 2 is that the application force during brake produces scheme drawing behind the existing shock-absorbing vehicle frame;

Fig. 3 is that the force action line of braking behind the existing shock-absorbing vehicle frame produces scheme drawing;

Fig. 4 is a plan sketch, illustrates that the present invention has a preferred embodiment of the bicycle of rear suspension avoiding vibration;

Fig. 5 is the line of one of the above-mentioned preferred embodiment of the present invention instantaneous center and trailing wheel earth point and the scheme drawing of the corresponding force action line of horizontal angle;

Fig. 6 is the combination section of one of the above-mentioned preferred embodiment of the present invention Shock absorber, illustrates that a main piston position is in a primary importance;

Fig. 7 is one of above-mentioned preferred embodiment of the present invention trailing wheel illustrative view, illustrates that trailing wheel vibration direction compression and interlock one upper and lower connecting rod on one produce the action diagram that pivots in the same way;

Fig. 8 is the action scheme drawing of the Shock absorber of the above-mentioned preferred embodiment of the present invention, illustrates that this main piston is by the primary importance second place of advancing; And

Fig. 9 is the centre of gration distribution schematic diagram of taking turns centrode after the above-mentioned preferred embodiment of the present invention, illustrate centre of gration that trailing wheel vibrates direction compression up and make the trailing wheel centrode towards a rear to the simplified schematic diagram that produces extension.

The specific embodiment

As shown in Figure 4, the present invention has the bicycle embodiment of rear suspension avoiding vibration, include a rear suspension system 100, one and the preceding spider body that links of this rear suspension system 100 200, one group be located at these preceding spider body 200 1 the place aheads to the front-wheel 300 of I, crank unit 400, that is located at these preceding spider body 200 bottoms be subjected to these crank unit 400 interlocks driver element 500, a pair of should front-wheel 300 and the position is located at trailing wheel 600 in this rear suspension system 100 at these preceding spider body 200 1 rears to II and group.

Should before spider body 200 have a vehicle head tube 210, a pair of following pipe 240 and that pipe 230, is connected between this vehicle head tube 210 and this pipe 220 and manage on this below 230 position of going up that is connected between this vehicle head tube 210 and this pipe 220 of seat pipe 220, that should vehicle head tube 210 is connected these pipe 220 1 bottoms and manages the 240 five-way axles 250 that are connected with this time.

This crank unit 400 has a crank 410 and two pedals 420 that are located at these crank 410 2 ends.

This driver element 500 has a fluted disc 510 that is attached at this crank unit 400, one and the rear flywheel group 520 that links of this trailing wheel 600 and the winding chain 530 on this fluted disc 510 and rear flywheel group 520, and when the fluted disc group is three before one, then these fluted disc 510 indications are middle sheet fluted disc, when the fluted disc group is two before one, the midway location that then refers to these two fluted discs, when the fluted disc group is monolithic before one, then refer to this fluted disc 510.

This rear suspension system 100 comprise one by this preceding spider body 200 towards this rear to the Vee formation support body 10, that II extends be articulated in this Vee formation support body 10 with should before lower link 20, between the spider body 200 be articulated in this Vee formation support body 10 and be somebody's turn to do between the preceding spider body 200 and be articulated in Shock absorber 40 between this preceding spider body 200 and this boxed rod 30 at the boxed rod 30 and above this lower link 20.

This Vee formation support body 10 has a pair of following breeches pipe of should five-way axle 250 and extending to II along this rear 11, and is fixed in the back ditch pawl 13 of these upper and lower breeches pipe 11,12 joints with this time breeches pipe 11 crossing upper branch pipes 12 and that are ㄥ shape.This time breeches pipe 11 has the lower fork leading section 111 of contiguous this five-way axle 250, and this upper branch pipe 12 has one and pitch leading section 121 on above this lower fork leading section 111.

This lower link 20 has one and is located at first rotating shaft 21 on this time pipe 240, and is provided with and spool is located at second rotating shaft 22 of pitching leading section 111 under this Vee formation support body 10 on the contrary with this first rotating shaft 21.And 21 of this first rotating shafts are above these preceding spider body 200 five-way axles 250, and the position 250 pairs on this five-way axle should the place ahead to the sidepiece of I.

These boxed rod 30 general triangularities, and have the 3rd rotating shaft 31 that is located on this Vee formation support body 10 fork leading section 121, and be the articulated section 32 and of opposite setting between between the 3rd rotating shaft 31 and this articulated section 32 and spool be located at the 4th rotating shaft 33 on this pipe 220 with the 3rd rotating shaft 31.

Cooperate and to consult Fig. 6, this Shock absorber 40 has a Master cylinder body 41, and is set in these Master cylinder body 41 in-to-in main pistons 42, and is set in these Master cylinder body 41 exterior auxiliary cylinder blocks 43, to be set in this auxiliary cylinder block 43 inner and be fixed on that auxiliary piston 44, on this Master cylinder body 41 is attached between this main piston 42 and this auxiliary cylinder block 43 and be located in the answer unit 47 that these piston rod 45 in-to-in adjusting levers 46 and one provide these main piston 42 back stretch adjustably along the piston rod 45, of axis extension.This Shock absorber 40 is set under (No Sag) in no amount of compression, and any stampede power can't produce stretching action to this Shock absorber 40.

This Master cylinder body 41 have one be articulated in before the bottom on the pipe 240 411 under the spider body 200, one with the main-cylinder wall 413 of top ends 412 and between this end, top ends 411,412 of these bottom 411 opposite settings, and this top ends 412 has a minor diameter part 412 '.And this bottom 41 are positions 21 pairs of first rotating shafts of this lower link 20 should the place ahead to the sidepiece of I.

This main piston 42 levels off to second grease chamber 422 of this top ends 412 in these Master cylinder body 41 inner area every first grease chamber 421 and that is formed with contiguous this bottom 411, this second grease chamber 422 is connected with this minor diameter part 412 ', and its sectional area is greater than this minor diameter part 412 '.

This auxiliary cylinder block 43 has a pivot part 432 that is set on these Master cylinder body 41 exterior socket parts 431 and the opposite articulated section 32 that is provided with and is articulated in this boxed rod 30 with this socket part 431.

This auxiliary piston 44 is to level off to the angrily chamber 442 of this socket part 431 in these auxiliary cylinder block 43 inner area every being formed with a positive air chamber 441 and that levels off to this pivot part 432, angrily the air pressure of chamber 442 is preferably identical with ambient pressure, and because of the air pressure of the chamber 442 of should doing something in a fit of pique is little, the air pressure of this positive air chamber 441 is also little.

This piston rod 45 is to be hollow tubular, has an oilhole 451 that is communicated with this first and second grease chamber 421,422, and this oilhole 451 has first port of being located on this main piston 42 452 and and is located at second port 453 on these piston rod 45 1 side faces.

This adjusting lever 46 has a pair of tapering 461 that should first port 452, and is subjected to 462 stoppers of control lever that are arranged on this auxiliary cylinder block 43, can produce displacement along an axis, adjust the sectional area of this first port 452.

This answer unit 47 have one be set in this Master cylinder body 41 in-to-ins at interval ring taps 471 and form at interval and a permitted gas space 472 by this interval ring taps 471 in this first grease chamber, one side, this permitted gas space 472 is filled with high pressure nitrogen.

As shown in Figure 5, above-mentioned rear suspension system 100, this Vee formation support body 10 is with respect to one of this preceding spider body 200 instantaneous center O, first a straight line L1 and by these lower link 20 first rotating shafts 21 and second rotating shaft 22 passes through the point of crossing of the second straight line L2 of the 3rd rotating shaft 31 of this boxed rod 30 and the 4th rotating shaft 32 just, and the line and the horizontal angle theta of this instantaneous center O and these trailing wheel 600 earth points ₂Being about 40 °, is in trailing wheel 600 brake time force action line that produces and ground-surface angle theta ₁In (about 45 ° ± 5 °) scope, reduce to minimum to the influence of back crop rotation brake shock-absorbing so can make.

Again as shown in Figure 6, when the rider is being sitting on the seat cushion and is carrying out trample action, set under (no sag setting) in no amount of compression, any stampede power can't produce stretching action to this Shock absorber 40, can reduce the loss of trampling energy.At this moment, 42 pairs of this main pistons should Master cylinder body 41 and the position in a primary importance, second port 453 of this oilhole 451 is corresponding to the minor diameter part 412 ' of this Master cylinder body 41.And this auxiliary piston 44 also to should auxiliary cylinder block 43 and the position in an extreme lower position.

Again as shown in Figure 7, running into road bump in bicycle is advanced rises and falls, when impelling trailing wheel 600 direction Y swinging gradually on one, second rotating shaft 22 of this lower link 20 is to be center of turn and produced to revolve to the I direction towards this place ahead to II by this rear and move (clockwise direction as shown in the figure) with first rotating shaft 21, the 3rd rotating shaft 31 of this boxed rod 30 be with the 4th rotating shaft 33 be center of turn and by the rear to II forward direction I produce to revolve and move (clockwise direction as shown in the figure), and as shown in Figure 8, the pivot part 432 that utilizes this articulated section 32 to drive this auxiliary cylinder block 43 produces to contract with respect to this Master cylinder body 41 and moves, pressure fluid is flowed towards this second grease chamber 422 by this first grease chamber 421, and make this main piston 42 by this primary importance towards leveling off to the generation of one of this interval ring set 471 second place when advancing, utilize the sectional area difference of this minor diameter part 412 ' and second grease chamber 422, produce throttling in this primary importance when making second port 453 of this oilhole 451, and speed gradually towards second place gait of march by primary importance at this main piston 42 corresponding to this minor diameter part 412 '.At this moment, because of producing to contract with respect to this Master cylinder body 41, moves this auxiliary cylinder block 43, make this auxiliary piston 44 march to a higher position, and the high pressure gas of main gas tank 41 are compressed, and the high pressure nitrogen of these permitted gas space 472 inside also can be spaced apart ring taps 471 compressions originally by extreme lower position.That is to say,, utilize this main piston 42 to produce the effect of throttling, buffering in primary importance in the moment that vibrations produce.

Subsequently, when the shaking force on the pivot part 432 of bestowing auxiliary cylinder block 43 disappears, utilize the rebound action of the high pressure nitrogen of the high pressure gas of positive air chamber 441 and permitted gas space 472, this auxiliary cylinder block 43 and interval ring taps 471 can revert back to the position of Fig. 6, and this main piston 42 also can be retracted primary importance by the second place, and pressure fluid is flowed towards this first grease chamber 421 by this second grease chamber 422, and utilize the sectional area difference of this second grease chamber 422 and minor diameter part 412 ', also produce throttling when making second port 453 of this oilhole 451 in this primary importance corresponding to this minor diameter part 412 ', and slack-off gradually towards the primary importance gait of march at this main piston 42 by the second place.Thus, can prevent that these Shock absorber 40 resiliences and this auxiliary piston 44 and auxiliary cylinder block 43 from producing bump, can increase the service life of Shock absorber 40.

Again as shown in Figure 4, when trampling application of force pedal 420, chain 530 tension force and weight transfer can produce an application force to back ditch pawl 13, this application force has the direction of difference when different ratio of number of teeth, when the centre of gration (VPP) of trailing wheel centrode is positioned on the aviation value of each active line, can get the less degradation of energy of trampling.The present invention has bicycle 100 embodiment of rear suspension avoiding vibration, the centre of gration of its trailing wheel centrode (VPP) is when normal ride position (Sag is 1/4 ~ 1/3 Shock absorber stroke), the tangent place of also suitable this chain 530 of convergence and this fluted disc 510 is so can reduce the loss of trampling energy.

And when the centre of gration of this trailing wheel centrode (VPP) is swung away from the ground-surface direction Y of going up along with trailing wheel 600 continuation courts, can be to this rear to II extension (as Fig. 9), the pedal that causes in the time of then can reducing the shock-absorbing start recalcitrates effect.And the centre of gration (VPP) of this trailing wheel centrode of the present invention is comparatively concentrated, and the tangent place of this chain 530 of convergence and this fluted disc 510, its scope is the point of contacts of trailing wheel 600 centers to fluted disc 510, level is 100mm forward, level is 150mm backward, this tangent line scope that offect20mm surrounded up and down thus, also helps to reduce the loss of trampling energy.

What deserves to be mentioned is, the present invention's the Shock absorber 40 angrily air pressure of chamber 442 is little, relatively, the air pressure of positive air chamber 441 is also little, thus, not only comparatively simple on making (precision, air-tightness do not need to require too high), cost are also lower, and the air pressure of positive air chamber 441 is little, can avoid rigidity too strong, can guarantee traveling comfort.And this control lever 462 of utilization operation can be adjusted the sectional area between the tapering 461 and first port 452, and can in time adjust cushion characteristic.

Below, will be summarized as follows with regard to the effect that the present invention can produce:

One,, be that VPP is dropped near the tangent line that trailing wheel center and preceding fluted disc group form even on the tangent line, so chain tension makes the amount of compression of Shock absorber 40 drop to minimum to the moment that VPP produced when can the actv. minimizing trampling for the loss of trampling energy.

Two, the no amount of compression that sees through this Shock absorber 40 is set (no sag setting), make the rider on being sitting in seat cushion and when carrying out trample action, can't or this Shock absorber 40 of start a little, reach the purpose of low energy losses, but when meeting with the impact of hole, hole, but can sensitive start.

Three, when the rider carries out trample action with stance, because the relation of weight transfer effect, the strength that the strength that makes rider's body weight bestow Shock absorber 40 is bestowed less than being sitting on the cushion, if there is no sag setting to set, then same stampede power and same ground-surface impact when driving, for Shock absorber 40 and Yan Douhui has less shock-absorbing stroke, the shock-absorbing design compared to sag setting is arranged can significantly reduce the degradation of energy of standing when trampling.

Four, influence the start part of Shock absorber 40 in brake, because this Vee formation support body 10 is that to take turns 600 touchdown points afterwards be that initial point and level ground angle are in 45 ° ± 5 ° fan-shaped range in the position with respect to the instantaneous center O of this preceding spider body 200, according to aforesaid calculating as can be known, such design can be so that the influence of brake drops to minimum.

Five, the part that recalcitrates at pedal, it produces reason as above stated specification, leads because of the chain length variations when the shock-absorbing start, makes its RC changing value be similar to the chain length variations at this problem improvement, and then this phenomenon just can be significantly improved.

Six, because Shock absorber 40 be the setting of no sag setting, make positive air chamber 441 have certain precompressed, when this precompressed more greatly, except the design of Shock absorber 40 to heal firm, start is also more insensitive, from Pp=Np+F (the positive air chamber air pressure of Pp=; The Np=chamber air pressure of doing something in a fit of pique; The F=rider body weight application of force) as can be known, can reach the purpose that reduces positive air chamber 441 air pressure, when chamber 442 air pressure of doing something in a fit of pique are healed low even are ambient pressure, then can reach the most desirable positive air chamber 441 air pressure through reducing chamber 442 air pressure of doing something in a fit of pique.

But when accessory air-space 442 air pressure are lower, the effect that causes is that Shock absorber 40 recoils to the limit easily, and when reaching the shock-absorbing extreme limit of travel, can make Shock absorber 40 moving members collide mutually and damage easily, Shock absorber 40 utilizes a hydraulic top out bumper for this reason, make to produce the effect of buffering when the shock-absorbing rebound stroke is about to reach capacity, and then prolong the life-span of Shock absorber.Certainly do not limit and utilize hydraulic pressure, any object or method that reaches the elastic buffer effect all can reach identical effect.

The above person, only for the present invention's preferred embodiment, can not limit the scope of the invention process with this, promptly the simple equivalent of being done according to the present patent application claim and description of the invention content generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.

Claims (8)

1. bicycle with rear suspension avoiding vibration, it is characterized by: spider body before comprising, one be located at this preceding spider body one the place ahead to front-wheel, one group be located at this preceding spider body one rear to trailing wheel and organize the rear suspension system that is located between this preceding spider body and this trailing wheel towards a rear to extension, should have a vehicle head tube by preceding spider body, a pair of seat pipe that should vehicle head tube, one is connected the five-way axle that this vehicle head tube and following pipe and between this pipe are connected this pipe one bottom and are connected with this time pipe, it is that initial point and level ground angle are in 45 ° ± 5 ° scopes that the Vee formation of this rear suspension system is taken turns touchdown point afterwards to the instantaneous center of preceding triangle pendulum, and VPP is near the tangent line of trailing wheel center and fluted disc formation or on the tangent line, the stampede power that makes the rider be sitting on the seat cushion to be applied is reduced to minimum to the stretching action of a Shock absorber generation, and this Shock absorber is set in no amount of compression under (no sag setting), sensitive and the minimizing degradation of energy of Shock absorber start when trampling, and the pressure fluid of this Shock absorber is flowed towards one second grease chamber by one first grease chamber, and a piston marches to a second place by a primary importance, be to produce throttling in this primary importance, pressure fluid is flowed towards this first grease chamber by this second grease chamber, and this piston marches to this primary importance by this second place, also is to produce throttling in this primary importance.

2. the bicycle with rear suspension avoiding vibration according to claim 1, wherein, this Shock absorber has a Master cylinder body, one is set in this Master cylinder body in-to-in main piston, one is set in the exterior auxiliary cylinder block of this Master cylinder body, one to be set in this auxiliary cylinder block inner and be fixed on auxiliary piston on this Master cylinder body, one piston rod and that is attached between this main piston and this auxiliary cylinder block provides this main piston to be transformed into the answer unit of this extended state elastic force by this compressive state, this main piston this Master cylinder body inner area every be formed with this first, two grease chambeies, this auxiliary piston in this auxiliary cylinder block inner area every being formed with angrily chamber of a positive air chamber and.

3. the bicycle with rear suspension avoiding vibration according to claim 2, wherein, the piston rod of this Shock absorber has the oilhole of this first and second grease chamber of connection, this oilhole has first port of being located on this main piston and and is located at second port on this piston rod, this main piston is when primary importance, this second port is corresponding to one of this Master cylinder body minor diameter part, and this main piston is when the second place, and this second port is corresponding to having second grease chamber of sectional area greater than this minor diameter part.

4. the bicycle with rear suspension avoiding vibration according to claim 3, wherein, this Shock absorber has more one and is located in this piston rod in-to-in adjusting lever adjustably, and this adjusting lever produces displacement along an axis, can adjust the sectional area of this first port.

5. the bicycle with rear suspension avoiding vibration according to claim 2, wherein, the answer unit of this Shock absorber have one be set in this Master cylinder body in-to-in at interval ring taps and form at interval and a permitted gas space by this interval ring taps in this first grease chamber, one side, this permitted gas space is filled with high pressure gas.

6. the bicycle with rear suspension avoiding vibration according to claim 2, wherein, the air pressure of the angrily chamber of this Shock absorber is preferably identical with ambient pressure.

7. the bicycle with rear suspension avoiding vibration according to claim 1, VPP position wherein, its scope is the point of contact of trailing wheel center to fluted disc, and level is 100mm forward, and level is 150mm backward, this tangent line scope that offect20mm surrounded up and down.

8. the bicycle with rear suspension avoiding vibration according to claim 7, wherein, when the fluted disc group is three before one, then this fluted disc indication is middle sheet fluted disc, when the fluted disc group is two before one, then refers to the midway location of these two fluted discs, when the fluted disc group is monolithic before one, then refer to this fluted disc.

Images