CN2137639Y - Shockproof device for front-fork blades of bicycle - Google Patents

Abstract

The utility model relates to a damping device for front-fork blades of a bicycle device, mainly comprising a piston pipe, a piston cylinder pipe and a positioning seat. The piston pipe is penetrated in the piston cylinder pipe, and the inner part of the piston cylinder pipe is also provided with an upper rubber ring, a compressed spring, a lower rubber ring and a guide rod which is penetrated in the lower rubber ring. The utility model can obtain the damping effect of multiple different property sections and can connect the piston pipe and the piston cylinder pipe as integration through the guide rod, preventing the piston pipe and the piston cylinder pipe from separating. The structure of the utility model is also helpful to preventing the generation of noise.

Description

Shockproof device for front-fork blades of bicycle

The utility model relates to a kind of front fork of bicycle, particularly a kind of fork pin shock absorbing apparatus of bicycle front fork.

The fork pin shock absorbing apparatus of general bicycle front fork, as shown in Figure 1, it is combined by a piston tube (11), a piston cylinder pipe (12), a upper spring seat (13), a lower spring cup (14) and compression spring elements such as (15) substantially; Wherein this piston tube (11) is located in this piston cylinder pipe (12), and this upper spring seat (13) is installed in the end that penetrates of this piston tube (11), this lower spring cup (14) then is installed in the interior appropriate location of this piston cylinder pipe (12), this compression spring (15) is to be installed between this upper spring seat (13) and this lower spring cup (14) so, the suitable elastic effect of bicycle buffering and shock preventing can be provided in this way, have much practicality according to the above fork pin shock absorbing apparatus of as if commonly using the bicycle front fork, find wherein still to exist critical defect unavoidably but scrutinize: one, should have the buffering and shock preventing of the fork pin of bicycle front fork now, owing to only rely on this compression spring (15) separately, adding that the diameter of this compression spring (15) is consistent end to end has no to change, therefore the ability of shock-absorbing is real limited, can't obtain the comfortable actual effect of buffering really; They are two years old, should have its interior employed compression spring (15) of fork pin of bicycle front fork now, if belong to the spring of common metal system, its elastic reaction is comparatively sensitive, reaction is very fast, though applicable to travelling of continuous recessed road, but in case meet with the recessed road of moment, too fast because of elastic reaction, cause the noise of collision on the contrary easily, and tool does not drive comfortable sense, otherwise this compression spring (15) is if belong to plastics spring (that is polyurethane spring), and its elastic reaction reaction is slower, though then applicable to the recessed road of moment, that must guarantee to drive is comfortable, in case run into travelling of continuous recessed road, because the plastics spring reaction is too late, the generation of noise is arranged in the time of as a result, completely lose the effect of shock-absorbing; They are three years old, the fork pin that should have the bicycle front fork now is to make axial relative displacement, owing to there is no the auxiliary isolated component of any actv. between this piston tube (11) and this piston cylinder pipe (12), so axial relative displacement of this piston tube (11) and this piston cylinder pipe (12), inevitably must carry out with the contact condition of face and face, so not only friction drag is big, diminish the effect of buffering and shock preventing, in case and this piston tube (11) or this piston cylinder pipe (12) side are subjected to slight impact, might promptly again can't carry out axial motion, cause the unsve state of scrapping; They are four years old, fork pin that should existing bicycle front fork is because after this piston tube (11) penetrates this piston cylinder pipe (12), the two is linked do not separate the just slight joint of this compression spring (15) that relies on, therefore the strength of connection deficiency is beated down in strong movements probably, causes separately break-off, so both non insurances, also dangerous, and can influence shock-proof effect, even produce the noise of collision; They are five years old, the fork pin that should have the bicycle front fork now uses for a long time, in case this compression spring (15) produces the elastic fatigue phenomenon, especially when left and right two its in-to-in compression spring (15) elastic force of fork pin are uneven, be to adjust to make to return to original state, therefore must renew fully completely, increase unnecessary waste in rain; They are six years old, should have the fork pin of bicycle front fork now, because wherein this piston cylinder pipe (12) is to utilize aluminum alloy materials to forge to form, move back mould when forging for convenience, the hollow wall of natural this piston cylinder pipe (12) must be made into the inclination pushing and drawing shape, the fiat-machined of this hollow wall is carried out at the rear and mould to be moved back finishes, be beneficial to the longitudinal travel motion of piston tube (11) thereafter, therefore promptly can increase cost of processing in a lot of manufacturing virtually, and inconjunction with also can't be obtained saving of labor, time-saving effect; Its seven, the employed compression spring of fork pin of this existing bicycle front fork is done the time spent owing to be not subjected to guide properly, therefore is easy to produce the deflection displacement, and then causes and pitch pin pipe friction noise jamming phenomenon.

Primary and foremost purpose of the present utility model, be to provide a kind of fork pin shock absorbing apparatus of bicycle front fork, complement each other by common collocation of institute such as plastics spring, half olivary compression spring and recoil springs, get so that suspension system links up and be one, gap like water off a duck's back to each other, obtain the effect of multiple heterogeneity highway section shock-absorbing, have advantage of wide range of application.

An of the present utility model purpose, be to provide a kind of fork pin shock absorbing apparatus of bicycle front fork, because but the locking action of its mat pilot bar links piston tube and piston cylinder is one, make no break-off, the correct action direction of bootable each spring again makes not produce the deflection displacement in addition, therefore can guarantee to pitch the stable of pin inner elastomeric pressure, and the unlikely shock-proof effect that influences can not produce noise yet.

A purpose more of the present utility model, be to provide a kind of fork pin shock absorbing apparatus of bicycle front fork, but because being installed in respectively between piston tube and the piston cylinder pipe two relative axial motion elements of the wear-resisting copper axle bush of mat and piston ring, only rely on 2 wipe contact, contact the big friction drag that is brought with face because of being able to elimination face, not only help the smooth and easy of axial relative motion, and the durable life-span of holding concurrently and can improve product.

Another purpose of the present utility model, be to provide a kind of fork pin shock absorbing apparatus of foot-operated front fork, in case fork pin in-to-in compression spring uses for a long time, when producing the elastic fatigue phenomenon, it can make it adjustment immediately and return to normal operating condition, to avoid the unnecessary waste that spare part is produced that renews.

Another purpose of the present utility model, be to provide a kind of fork pin shock absorbing apparatus of bicycle front fork, special implantation of the piston cylinder pipe that forms by aluminum alloy materials forging inwall when forging a straight high-abrasive material is arranged, can be for the direct use of longitudinal travel motion thereafter, therefore really can save piston cylinder pipe forging back hollow wall and must reprocess the cost waste that to use, relatively also can obtain saving of labor, time-saving effect.

The purpose of this utility model reaches as follows:

A kind of fork pin shock absorbing apparatus of bicycle front fork comprises a piston tube, a piston cylinder pipe, a positioning seat, a compression spring, and described piston tube is located in the piston cylinder pipe, is provided with the high-abrasive material of a hollow tubular in described piston cylinder pipe;

The bottom is provided with a lower rubber ring that the shock-absorbing effect arranged in this piston cylinder pipe;

Described compression spring is partly olive-shaped, is installed in the hollow inside of this piston cylinder pipe, just is positioned at the top of this lower rubber ring;

In the hollow inside of this piston cylinder pipe, just be positioned at the top of this compression spring, be provided with the upper rubber ring that at least one has the shock-absorbing effect;

Described positioning seat is arranged on the top of this upper rubber ring, and its central authorities offer a hole;

One pilot bar, the one end wore elements such as described positioning seat, upper rubber ring, compression spring and lower rubber ring simultaneously, then locked in the hollow inside of this piston cylinder pipe again;

Described piston tube, its end button are established the residence and are stated positioning seat and form one with it;

By the piston ring that wear-resisting copper material is made, the sheathed ora terminalis that is fixed on described piston tube, itself and the interior set hollow tubular high-abrasive material of described piston cylinder pipe produce moving contact;

By the made axle bush of wear-resisting copper material, be installed in the inner appropriate location of this piston cylinder pipe, itself and described piston tube moving contact.

The set hole of described positioning seat central authorities is stepped, in this hole, hold one can force described compression spring and described upper rubber ring and lower rubber ring no matter when all binding be the recoil spring of one.

Graphic detailed description

Fig. 1 is the longitudinal profile scheme drawing of the fork pin shock absorbing apparatus of existing bicycle front fork.

Fig. 2 is the stereo appearance figure of the whole front fork of the utility model.

Fig. 3 is the longitudinal profile combination scheme drawing of the utility model uncompressed state.

Fig. 4 is the longitudinal profile combination scheme drawing of the utility model compressive state.

Please cooperate and consult shown in Fig. 2,3,4, the fork pin shock absorbing apparatus of a kind of bicycle front fork provided by the utility model comprises that upper rubber ring (5), a positioning seat (6), a recoil spring (7), of a piston cylinder pipe (2), a lower rubber ring (3), a compression spring (4), a predetermined number adjusted screw rod (8), a piston tube (9), a piston ring (10), axle bush assemblies such as (20); Wherein:

This piston cylinder pipe (2) is formed by the aluminum alloy materials forging, because structure is to be same as prior art basically, promptly having prevents dust protects oily overcoat (21), oil retainer elements such as (22), so identical part is then no longer added to give unnecessary details in this; Being different from prior art as for it, mainly is special high-abrasive material (23) that a hollow tubular is arranged of implanting in appropriate location in forging simultaneously it, forges so that beginning after finishing need not lose time again and cost is engaged in the fiat-machined of inwall;

This lower rubber ring (3) is made by elastomeric materials such as polyurethane adhesives, is installed in this piston cylinder pipe (2) hollow inside, and so that the shock-absorbing effect to be provided, it avoids impairedly for protection certainly, can install a packing ring (31) in addition between itself and this piston cylinder pipe (2) and safeguard it; What deserves to be mentioned is that this lower rubber ring (3) is a kind of plastics spring in the present embodiment;

This compression spring (4) is partly olive-shaped, and promptly Shang Xia external diameter is neither identical, increase gradually from top to bottom, use the effect of the different amount of compressions of performance segmentation, it is installed in the hollow inside of this piston cylinder pipe (2), just be positioned at the top of this lower rubber ring (3), so that multiple stage shock-absorbing effect to be provided; Certainly avoid oppressed impairedly for this lower rubber ring of protection (3) makes, between this compression spring (4) and this lower rubber ring (3), more can add a sheathed packing ring (41);

The upper rubber ring of predetermined number (5) is made by elastomeric materials such as polyurethane adhesives, is installed in the hollow inside of this piston cylinder pipe (2) in regular turn, just is positioned at the top of this compression spring (4), so that the shock-absorbing effect to be provided; Certainly avoid oppressed impairedly for this each upper rubber ring (5) of protection makes, between this compression spring (4) and this each upper rubber ring (5), more can add and install a packing ring (51); What deserves to be mentioned is that the upper rubber ring in the present embodiment (5) is a kind of plastics spring;

This positioning seat (6) is arranged on the top of this predetermined number upper rubber ring (5), which is provided with a stepped hole (61);

Recoil spring (7) is installed in the set stepped hole (61) of this positioning seat (6);

Pilot bar (8), one end wore upper rubber ring (5), compression spring (4) and the lower rubber ring elements such as (3) of this recoil spring (7), this positioning seat (6), this predetermined number simultaneously, then locked in the hollow inside of this piston cylinder pipe (2) again; It should be noted that, loosening for preventing produced by jerk after it from locking, wherein more can sheathed thereon one locking spring (81), this locking spring (81) is that an end props up this pilot bar (8) itself, the other end then is butted on the packing ring (41) of this lower rubber ring (3) top, so is subjected to the elasticity effect of tightening to make the possibility of non-loosening;

This piston tube (9) is located in the inside of this piston cylinder pipe (2) movably, utilizes its end button to establish this positioning seat (6) and forms one with it;

This piston ring (10), made by wear-resisting copper material, be the sheathed ora terminalis that is fixed on this piston tube (9), the set hollow tubular high-abrasive material (23) of itself and piston cylinder pipe (2) produces moving contact;

This axle bush (20), made by wear-resisting copper material, be to be installed in the inner appropriate location of this piston cylinder pipe (2), with piston tube (9) moving contact;

The above is the interrelation position of each constituent components of fork pin shock absorbing apparatus assembling of the utility model bicycle front fork and the general introduction of structure so.

Operating principle of the present utility model and advantage are as follows:

When in a single day the fork pin of the utility model bicycle walks in rough road surface, impact of being born or vibrations promptly can be with strength via this piston cylinder pipe (2), and be passed to this lower rubber ring (3) respectively successively, compression spring (4), upper rubber ring elements such as (5), with the difference absorbing vibration, wherein it should be noted that, more owing to there is this to be helping of half olive-shaped compression spring (4), by its various outer diameter, the variation of different amount of compressions, therefore can produce the variation of the different damping capaictys of multistage virtually again, so utilize the sectional type shock-absorbing to produce the effect of multiple shock-absorbing.

The utility model is because wherein used elastic reaction comparatively sensitive, on the plastics spring formation that fast speed compression spring (4) cooperation elastic reaction is slow slightly, lower rubber ring (3), (5) its Special Significance is arranged, this elastic reaction is comparatively sensitive, fast speed compression spring (4) is the usefulness in order to be applicable to travel in continuous convex-concave road, by its sensitive elastic reaction, can make the shock-proof effect performance to ultimate attainment, the reason elastic reaction does not have little time to deal with the jerk that the short time constantly occurs inadequately soon, and the slow slightly plastics spring of this elastic reaction on, lower rubber ring (3), (5) then be in order to be applicable to the moment recessed road usefulness of travelling, by its slow slightly elastic reaction, when in case the big pothole in experience road surface can't be dodged, also shock impacts can be eliminated fast, then slowly return to original state again, so from making vibrations no longer continue to be passed to other assemblies, cause other uncomfortable noises to occur, so for avoid this compression spring (4) and this plastics spring on, lower rubber ring (3), (5) effect can't link up to each other, the gap produces to some extent, cause effect to reduce by half, so the utility model is set up a recoil spring (7) in this positioning seat (6) top, use the compression force this compression spring (4) with should on, lower rubber ring (3), (5) no matter when can both be combined as a whole, in other words, complementation with two types of springs, for continuous recessed road, road surface, hollow place hole or craterlet etc. all each other harmony handle a situation with ease, and be unlikely the action of respectively doing each, so make that at last suspension system is linked up, help to impel the rider to feel more comfortable, do not have any noise extremely and produce.

As between piston tube (9) and this piston cylinder pipe (2) because of the sealed binding of this pilot bar (8) is arranged, and the locking spring of mat (81) and recoil spring (7) are tightened support, making not can carrying out and produces displacement with axial relative motion, cause further sealed, so there is not the trouble of separation, naturally unlikelyly influence its shock-proof effect, and also reason spare part lax and cause the generation of collision noise not; And this compression spring (4) can be avoided producing the contact friction noise with piston tube (9) and this piston cylinder pipe (2) also because the unlikely generation compression of the guiding deflection displacement of this pilot bar (8) is arranged.

In addition, owing to be provided with this piston ring (10) and this axle bush (20) between this piston tube (9) and this piston cylinder pipe (2), by its wear-resisting copper characteristic, add the contact that is the point-like small size, therefore the generation of resistance will help to reduce friction, the motion to axial that performance is fully smooth is to prolong its service life; Moreover, in case when meeting with this compression spring (4) and using unfortunate for a long time elastic fatigue, this is especially severe when uneven with the elastic pressure of both sides forks pin especially, must be renewed immediately in the past, only the utility model is as long as stretch into instrument to move this pilot bar (8) from this piston tube (9), make this pilot bar (8) and this piston cylinder pipe (2) further sealed, to compress this compression spring (4), it is highly reduced, so then can impel this compression spring (4) elasticity to have increased access to lives again, increase its service life, this fork pin can restore to the original state again so, no longer includes the situation of any fault or pressure inequality.

Be worth this special one carry be, this piston cylinder pipe (2) is owing to the implantation of inwall in forging molding has a hollow tubular high-abrasive material (23), can guarantee that this section position need not process and to keep smooth flat, and this hollow tubular high-abrasive material (23) just with the position of this piston ring (10) moving contact, therefore this piston cylinder pipe (2) forges time-consuming, the phenomenon of taking a lot of work that Bi Zike saves the reprocessing inwall, also can significantly reduce manufacturing cost certainly virtually.

Claims (1)

1, a kind of fork pin shock absorbing apparatus of bicycle front fork, comprise a piston tube, a piston cylinder pipe, a positioning seat, a compression spring, described piston tube is located in the piston cylinder pipe, it is characterized in that: the high-abrasive material that is provided with a hollow tubular in described piston cylinder pipe;

The bottom is provided with a lower rubber ring that the shock-absorbing effect arranged in this piston cylinder pipe;

Described compression spring is partly olive-shaped, is installed in the hollow inside of this piston cylinder pipe, just is positioned at the top of this lower rubber ring;

In the hollow inside of this piston cylinder pipe, just be positioned at the top of this compression spring, be provided with the upper rubber ring that at least one has the shock-absorbing effect;

Described positioning seat is arranged on the top of this upper rubber ring, and its central authorities offer a hole;

One pilot bar, the one end wore elements such as described positioning seat, upper rubber ring, compression spring and lower rubber ring simultaneously, then locked in the hollow inside of this piston cylinder pipe again;

Described piston tube, its end button are established the residence and are stated positioning seat and form one with it;

By the piston ring that wear-resisting copper material is made, the sheathed ora terminalis that is fixed on described piston tube, itself and the interior set hollow tubular high-abrasive material of described piston cylinder pipe produce moving contact;

By the made axle bush of wear-resisting copper material, be installed in the inner appropriate location of this piston cylinder pipe, itself and described piston tube moving contact;

The set hole of described positioning seat central authorities is stepped, in this hole, hold one can force described compression spring and described upper rubber ring and lower rubber ring no matter when all binding be the recoil spring of one.

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