SI21612A

SI21612A - Bicycle frame with spring-damped rear fork

Info

Publication number: SI21612A
Application number: SI200300251A
Authority: SI
Inventors: Marko BRATOVŽ
Original assignee: Marko BRATOVŽ
Priority date: 2003-09-29
Filing date: 2003-09-29
Publication date: 2005-04-30

Abstract

A bicycle frame, especially the one for fast driving and particularly for descends on out-of-road terrain according to the invention is designed in such a manner that in case of higher loads on rear wheel, it can reach a higher directional stability, while at lower loads it allows an adequate mobility. Such needs occur namely especially on fast descends out of roads, where tracks consist of straight steep sections and sharp curves alternating without intermediate transitions. The bicycle frame (1) with spring-damped rear fork (2) according to the invention is carried out of an optional front fork head (3), an underseat tube (4) and at least one section (5) connecting the head (3) and the underseat tube (4). A drive bearing (9) is carried out on the frame (1) or on the rear fork (2), where the latter consists of at least one couple of tines (7) which are ending with two elements holding a bed for the rear wheel and are bearing-supported at least once on the frame (1) in a pivoting manner. At the same time as the tines (7) are pivoted upwards against the top of the underseat tube (4), the two elements holding the bed for the rear wheel increase their distance from the drive bearing (9).

Description

Bratovž MarkoBrother Marko

Okvir kolesa z vzmetenimi zadnjimi vilicamiWheel frame with suspension rear forks

Predmet izumaThe subject of the invention

Predmet izuma je okvir kolesa z zadnjimi vzmetenimi vilicami. Okvir kolesa je zlasti primeren za sestavo kolesa za hitre vožnje, še posebej za spuste po terenu zunaj cestišč.The subject of the invention is a wheel frame with rear suspension forks. The bicycle frame is particularly suitable for the assembly of high-speed bicycles, especially for off-road descents.

Tehnični problemA technical problem

Tehnični problem, ki ga rešuje izum je, kako zasnovati tak okvir kolesa z zadnjimi vzmetenimi vilicami, ki naj bi pri večjih obremenitvah na zadnje kolo dosegel večjo smemo stabilnost, medtem ko naj bi pri nižjih obremenitvah dovoljeval ustrezno okretnost. Take potrebe se namreč pojavljajo zlasti pri hitrih spustih zunaj cestišč, kjer so proge sestavljene iz ravnih strmih odsekov in ostrih zavojev, pri čemer se ti odseki izmenjujejo brez vmesnih prehodov.A technical problem solved by the invention is how to design such a wheel frame with rear suspension forks, which is supposed to achieve greater stability at higher loads on the rear wheel, while allowing for lower agility at lower loads. Such needs arise in particular for rapid off-road descents, where the lines are composed of straight steep sections and sharp turns, alternating between those sections without intermediate crossings.

Znano stanje tehnikeThe prior art

Znani tovrstni okviri z zadnjimi vzmetenimi vilicami so izvedeni tako, da so zadnje vilice večdelne in je vsak krak (levi in desni) sestavljen iz več odsekov, ki so med seboj spojeni zasukljivo in tvorijo približne paralelograme. En par prednjih oglišč obeh krakov zadnjih vilic je uležajen v okvir v bližnjem območjuKnown frames of this type with rear suspension forks are designed such that the rear forks are multi-part and each arm (left and right) consists of several sections that are rotatably connected to each other to form approximate parallelograms. One pair of front corners of the two forks of the rear forks is mounted in a frame in the vicinity

29068.doc/IX-03/D-33-Vr gredi gonilk, drugi prednji par pa je neposredno ali pa preko dodatnega vzvoda vpet na vzmet in blažilnik.29068.doc / IX-03 / D-33-Vr of the crankshafts, the second front pair is mounted directly or through an additional lever on the spring and shock absorber.

Opisana geometrija odsekov zadnjih vilic, kot so opisane, zagotavlja, da se pri zasuku zadnjih vilic navzgor proti sedežu medosna razdalja med osema obeh koles vsaj ne zmanjšuje, lahko se celo ohranja ali nekoliko povečuje.The described geometry of the rear fork sections, as described, ensures that, as the rear forks swivel upwards towards the seat, the wheelbase between the axles of the two wheels is at least not reduced, even maintained or slightly increased.

Vendar pa obstaja potreba po še večjem povečevanju medosne razdalje, kadar se poveča sila na zadnje kolo s meri podlage zaradi komponente centrifugalne sile v ovinkih ali pa zaradi neravnin podlage tudi na ravnih odsekih. V obeh primerih vpliva podaljšanje medosne razdalje na stabilnost kolesa med vožnjo.However, there is a need to increase the wheelbase even further when the force on the rear wheel is increased with the dimension of the base due to the component of centrifugal force in bends or because of the unevenness of the base even on straight sections. In both cases, wheelbase extensions affect the stability of the wheel while running.

Rešitev tehničnega problemaThe solution to a technical problem

Opisani tehnični problem je rešen z novim okvirom z zadnjimi vzmetenimi vilicami, katerega bistvena značilnost in novost je v tem, da sta oba kraka zadnjih vilic tako sestavljena iz več odsekov, ki so med seboj pregibni in hkrati kot celota oprti na vzmet in blažilnik tako, da se pri zasuku vilic navzgor proti sedežu hkrati odmakne zadnja os nazaj, oziroma vstran od gonilke. S tem pa se podaljša medosna razdalja kolesa.The described technical problem is solved with a new frame with rear suspension forks, the essential feature and novelty of the fact that both arms of the rear forks are so composed of several sections, which are folding together and at the same time as a whole resting on the spring and shock absorber, that, when the forks are rotated upwards towards the seat, the rear axle is simultaneously moved back or away from the crank. This extends the wheelbase of the wheel.

Opisani izum je podrobneje pojasnjen z opisom nekaj izvedbenih primerov, ki so predstavljeni tudi na priloženih slikah, na katerih kaže sl. 1 shematski prikaz okvira kolesa z vzmetenimi zadnjimi vilicami po prvem izvedbenem primeru, sl. 2 shematski prikaz okvira kolesa z vzmetenimi zadnjimi vilicami po drugem izvedbenem primeru, sl. 3 shematski prikaz okvira kolesa z vzmetenimi zadnjimi vilicami po tretjem izvedbenem primeru,The present invention is explained in more detail by the description of some embodiments, which are also presented in the accompanying drawings, in which FIG. 1 is a schematic view of a wheel frame with a suspension rear fork according to the first embodiment, FIG. 2 is a schematic view of a wheel frame with a suspension rear fork according to another embodiment, FIG. 3 is a schematic view of the frame of a wheel with a suspension rear fork according to the third embodiment,

29068.doc/IX-03/D-33-Vr sl. 4 shematski prikaz okvira kolesa z vzmetenimi zadnjimi vilicami po četrtem izvedbenem primeru.29068.doc / IX-03 / D-33-Vr fig. 4 is a schematic illustration of a wheel frame with a suspension rear fork according to the fourth embodiment.

Okvir 1 kolesa z vzmetenimi zadnjimi vilicami 2 po prvem izvedbenem primeru, kot je prikazan na sl. 1, je izveden iz poljubne glave 3 za prednje vilice, ki niso prikazane na sliki, podsedežne cevi 4 in vsaj enega odseka 5, ki povezuje glavo 3 in podsedežno cev 4. Na spodnjem koncu odseka 5 je izveden ležaj 6, v katerem sta zasukljivo vpeta oba spodnja kraka 7 zadnjih vilic 2 in sicer tako, da del 8 krakov 7 moli izpred ležaja 6 naprej proti glavi 3, medtem ko je v bližini ležaja 6 v krakih 7 izveden ležaj 9 na sliki neprikazane gonilne osi.The frame 1 of the wheel with the rear suspension forks 2 according to the first embodiment, as shown in FIG. 1 is made of any head 3 for the front forks not shown in the figure, the sub-tube 4 and at least one section 5 connecting the head 3 and the sub-tube 4. At the lower end of the section 5, a bearing 6 is made in which they are rotatable The two lower arms 7 of the rear forks 2 are clamped so that a portion of 8 of the legs 7 protrudes from the front 6 forward towards the head 3, while a bearing 9 in the figure of the non-shown driving axis is made near the bearing 6 in the legs 7.

Dela 8 obeh krakov 7 sta zasukljivo povezana z elementom 10, le-ta pa zasukljivo z nihajnim elementom 11, ki je približno v srednjem območju zasukljivo uležajen v okviru 1, prednostno v odseku 5 in hkrati oprt na vzmet 12 in blažilnik 13, ki sta na nasprotnem koncu vpeta v okvir 1.The parts 8 of both legs 7 are pivotally connected to the element 10, and the latter is rotatably connected to the oscillating element 11, which is pivotally mounted in the frame 1 approximately in the middle region, preferably in section 5 and simultaneously supported on the spring 12 and the damper 13, which are at the opposite end, mounted in box 1.

Nihajni element 11 je nadalje zasukljivo povezan glede na povezavo z elementom 10 na nasprotnem koncu z drogovoma 14, ki sta usmerjena proti zadnjemu koncu obeh spodnjih krakov 7 tako, da tečeta bočno ob okviru 1. Istoležna zadnja konca drogov 14 in zadnja konca spodnjih krakov 7 sta med seboj zasukljivo povezana s krakoma 15, na katerih sta izvedeni tudi ležišči 16 za vpetje zadnjega kolesa, ki ni prikazan na sliki. Z odmikom lege ležišč 16 na krakih 15 od zadnjih spodnjih krakov 7 spreminjamo razmerje med zasukom zadnjega kolesa proti sedežu in hkratnim odmikom zadnjega kolesa nazaj.The swinging element 11 is further rotatably connected with respect to the connection with the element 10 at the opposite end with the rods 14, which are directed towards the rear end of the two lower arms 7 by flowing sideways along the frame 1. The same rear ends of the bars 14 and the rear ends of the lower arms 7 are pivotally connected to each other by the arms 15, on which are also provided bearings 16 for mounting the rear wheel, which is not shown. By shifting the position of the bearings 16 on the blades 15 of the rear lower blades 7, the ratio of rotation of the rear wheel to the seat and the rear bounce of the rear wheel are changed.

Drugi izvedbeni primer okvira 1 z vzmetenimi zadnjimi vilicami 2, kot je prikazan na sl. 2, je izveden iz poljubne glave 3 za prednje vilice, ki niso prikazane na sliki, podsedežne cevi 4 in vsaj enega odseka 5, ki povezuje glavo 3 in podsedežno cev 4. Na spodnjem koncu odseka 5 je izveden ležaj 6, v kateremA second embodiment of the frame 1 with the suspension rear forks 2 as shown in FIG. 2 is made of any head 3 for the front forks not shown in the figure, the sub-tube 4 and at least one section 5 connecting the head 3 and the sub-tube 4. At the lower end of the section 5, a bearing 6 is made in which

29068.dOC/IX-03/D-33-Vr sta zasukljivo vpeta oba spodnja kraka 7 zadnjih vilic 2 in sicer s svojima prednjima koncema. V bližini ležaja 6 je v okviru 1 izveden ležaj 9 na sliki neprikazane gonilne osi.29068.dOC / IX-03 / D-33-Vr are twisted both lower arms 7 of the rear forks 2 with their respective front ends. In the vicinity of bearing 6, bearing 1 is shown in frame 1 in the figure of the non-shown driving axis.

Na podsedežni cevi 4 je izveden ležaj 17, v katerem sta zasukljivo uležajeni nihajki 18 tako, da njuna daljša odseka molita nad in v smeri krakov 7, krajša kraka pa naprej proti glavi 3. Prednja konca nihaj k 18 sta oprta na vzmet 12 in blažilnik 13. Zadnja konca nihajk 18 sta zasukljivo povezana z nihajkama 19, katerih spodnja konca sta zasukljivo povezana z zadnjima koncema krakov 7, medtem ko sta prosta odseka nihajk 19 nad vpetjem z nihajkama 18 izvedena z ležiščema 16 za vpetje zadnjega kolesa, ki ni prikazano na sliki.On the sub-seat tube 4, a bearing 17 is made, in which the swing arms 18 are rotated so that their longer sections pray above and in the direction of the arms 7, and the shorter arms forward to the head 3. The front ends of the swing k 18 are supported by a spring 12 and a shock absorber. 13. The rear ends of the swingarms 18 are pivotally connected to the swingarms 19, the lower ends of which are pivotally connected to the rear ends of the arms 7, while the free sections of the swingarms 19 above the mounting with the swingarms 18 are made by the rear wheel restraints 16 not shown on picture.

S sukanjem zadnjih vilic 2 v smeri proti sedežu se odmika prosti konec nihajk 19, v bližini katerih je vpeto zadnje kolo, stran od okvira 1 in s tem se povečuje medosna razdalja kolesa.By twisting the rear forks 2 towards the seat, the free end of the swingarms 19, in the vicinity of which the rear wheel is mounted, away from the frame 1, thereby increasing the wheelbase.

Tretji izvedbeni primer okvira 1 z vzmetenimi zadnjimi vilicami 2, kot je prikazan na sl. 3, je izveden iz poljubne glave 3 za prednje vilice, ki niso prikazane na sliki, podsedežne cevi 4 in vsaj enega odseka 5, ki povezuje glavo 3 in podsedežno cev 4. Spodnja kraka 7 zadnjih vilic 2 sta izvedena v smislu črke L tako, da sta s prostima koncema pokončnih odsekov zasukljivo uležajena približno na sredini podsedežne cevi 4 v ležaju 20. V stiku obeh odsekov krakov 7 sta izvedeni naprej usmerjeni konzoli 21, ki sta na svojih prostih koncih povezani z drogovoma 22 preko ležajev 23, pri čemer sta drogova 22 s svojima nasprotnima koncema zasukjivo uležajena z ležajema 24 nad ležajem 20 na podsedežni cevi 4 ali pa drugje na okviru 1. Hkrati je konzola 21 oprta na vzmet 12 in blažilnik 13, ki sta sicer z nasprotnima koncema nameščena poljubno kje na okviru 1. Na zadnjih koncih krakov 7 je v ležišču 16 uležajeno zadnje kolo, ki ni prikazano na sliki.A third embodiment of a frame 1 with a rear fork 2, as shown in FIG. 3 is made of any head 3 for the front forks not shown in the illustration, the sub-tube 4 and at least one section 5 connecting the head 3 and the sub-tube 4. The lower arms 7 of the rear fork 2 are designed in the sense of the letter L, that the free ends of the upright sections are pivoted about approximately in the middle of the sub-seat tube 4 in the bearing 20. The joints of the two legs 7 are provided with forward-facing brackets 21 connected at their free ends to the masts 22 via the bearings 23, the masts being 22 with their opposite ends pivotally mounted with bearings 24 above the bearing 20 on the sub-tube 4 or elsewhere on the frame 1. At the same time, the bracket 21 is supported on the spring 12 and the damper 13, which are arranged with opposite ends anywhere on the frame 1. At the rear ends of the legs 7 bear a rear wheel in the bearing 16 not shown in the figure.

29068.doc/IX-03/D-33-Vr29068.doc / IX-03 / D-33-Vr

S sukanjem zadnjih vilic 2, oziroma krakov 7 v smeri proti sedežu se odmikata prosta konca krakov 7, v bližini katerih je vpeto zadnje kolo, stran od okvira 1 in s tem se povečuje medosna razdalja kolesa.By twisting the rear forks 2 or arms 7 towards the seat, the free ends of the arms 7, near which the rear wheel is clamped, move away from the frame 1, thereby increasing the wheelbase.

Četrti izvedbeni primer okvira 1 z vzmetenimi zadnjimi vilicami 2, kot je prikazan na sl. 4, je izveden iz poljubne glave 3 za prednje vilice, ki niso prikazane na sliki, podsedežne cevi 4 in vsaj enega odseka 5, ki povezuje glavo 3 in podsedežno cev 4.A fourth embodiment of a frame 1 with a suspension rear fork 2 as shown in FIG. 4 is made of any head 3 for the front forks not shown in the illustration, the sub-tube 4 and at least one section 5 connecting the head 3 and the sub-tube 4.

Zadnje vilice 2 so izvedene iz po dveh spodnjih krakov 7, ki sta izvedena kot ležeči črki L in sta v svojem oglišču zasukljivo uležajena nad ležajem 9 gonilne osi, ki ni prikazana na sliki, in sicer na podsedežni cevi 4, pri čemer sta kraka 7. Kraka 7 sta s svojima krajšima, navzdol usmerjenima odsekoma preko drogov 25 povezana z nihajko 26, kije uležajena na odseku 5 okvira 1, pri čemer je nihajka s svojim nasprotnim koncem oprta na vzmet 12 in blažilnik 13.The rear forks 2 are made of two lower arms 7, which are made in the letter L and are pivotally mounted in their corner above the bearing 9 of the driving axle, not shown in the illustration, on the sub-tube 4, with the arms 7 The legs 7 are connected by their shorter, downward sections through the masts 25 to the swingarm 26, which is mounted on the section 5 of the frame 1, with the swingarm with its opposite end resting on the spring 12 and the damper 13.

Nadalje so zadnje vilice 2 izvedene poleg spodnjih krakov 7 še iz zgornjih krakov 27, ki sta zasukljivo uležajena v ležaju 28 na podsedežni cevi 4 z enim koncem, z nasprortnim koncem pa sta preko elementa 29 zasukljivo povezana s krakoma 7 tako, da se priležna kraka 7 in zgornja kraka 27 križata, pri čemer je v elementih 29 izveden sedež 16 za na sliki neprikazano zadnje kolo.Further, the rear forks 2 are made in addition to the lower arms 7 from the upper arms 27, which are pivotally mounted in the bearing 28 on the sub-tube 4 with one end and are pivotally connected to the counter-end via the element 29 by the adjacent arms. 7 and the upper arms 27 intersect, with the seat 29 showing the rear wheel not shown in the figure 29.

Pri obremenitvi zadnjega kolesa zaradi neravne podlage se s kolesom zasukata elementa 27 v smeri navzgor, pri čemer se zaradi prekrižanih parov krakov 7 in zasukata elementa 27 tako, da se sedež 29 z zadnjim kolesom odmakne tudi nazaj od ležaja 9, hkrati pa se zadnje vilice 2 zaradi že opisane povezave spodnjih krakov 7 preko drogov25 in nihajke 26 na vzmeti 12 in v blažilniku 13 blaži in duši sila, ki je povzročila premik zadnjih vilic 2.When the rear wheel is loaded due to the uneven base, the elements 27 are rotated upwards with the wheel, due to the crossed pairs of legs 7 and the elements 27 are rotated so that the seat 29 with the rear wheel is also moved back from the bearing 9, while at the same time the rear forks 2 due to the previously described connection of the lower arms 7 via the rods25 and the swingarm 26 on the spring 12 and in the damper 13, the force that caused the rear forks to move 2 is dampened and suppressed.

29068.doc/IX-03/D-33-Vr29068.doc / IX-03 / D-33-Vr

Pri vseh opisanih izvedbenih primerih se z izbiro dolžin krakov zadnjih vilic in razmikov med vsakokratnimi ležaji določa razmerje zasuka zadnjih vilic navzgor in pomika sedeža zadnjega kolesa nazaj, kar je odvisno od osnovne namembnosti kolesa, glede na konfiguracijo in naklon terena.In all embodiments described, by selecting the length of the rear fork arms and the distances between the respective bearings, the ratio of the rear fork rotation upwards and the rear wheel seat movement is determined, depending on the basic purpose of the wheel, depending on the configuration and slope of the terrain.

Razume se, da lahko strokovnjak s tega področja na osnovi poznavanja gornjega opisa izuma zasnuje še druge izvedbene primere, ne da bi obšel značilnost izuma, kot je opredeljena v sledečih patentnih zahtevkih.It is understood that one of skill in the art can base other embodiments on the basis of knowledge of the above description of the invention without circumventing the feature of the invention as defined in the following claims.

29068.doc/IX-03/D-33-Vr29068.doc / IX-03 / D-33-Vr

Claims

Patent claims

1. Frame (1) of a bicycle with a spring rear fork (2) made of any head (3) for the front fork, sub-tube (4) and at least one section (5) connecting the head (3) and sub-tube (4), wherein the driving bearing (9) is made on the frame (1) or on the rear forks (2), characterized in that the rear forks (2) are made of at least one pair of arms (7) which terminate with the elements comprising the rear wheel seat and pivoted at least once on the frame (1) such that, when rotating the arms (7) upwards towards the top of the undercarriage (4), the elements with the rear wheel seat are also separated from the driving gear bearings (9).

Wheel frame (1) according to claim 1, characterized in that the rear forks (2) are arranged and fixed to the frame (1) such that a lower bearing (6) is provided to the lower end of the frame section (5). in which the two lower arms (7) are rotated so that a portion (8) of the legs (7) protrudes from the front (6) forward towards the head (3) while in the vicinity of the bearing (6) in the legs (7) ) a drive axle bearing (9), the parts (8) of the two arms (7) being pivotally connected to the element (10) and the pivoting element to the pivoting element (11), which is pivoted pivotally in the middle region frame (1), preferably in section (5) and at the same time resting on a spring (12) and a damper (13), which are clamped to the frame (1) at the opposite end, also giving the pivoting element (11) a pivotally connected with respect to connection with the element (10) at the opposite end with the masts (14) directed towards the rear end of the two lower arms (7) so as to flow sideways along the frame (1) and the rear ends of the masts (14) and the rear ends with the lower arms (7) are pivotally connected to each other by the arms (15), on which the bearings (16) are mounted to support the rear wheel.

Wheel frame (1) according to claim 1, characterized in that the rear forks (2) are arranged and fixed to the frame (1) such that at the lower end of the section (5)

29068.doc / IX-03 / D-33-Vr-bearing (6), in which both lower arms (7) are pivotally screwed in with their front ends, with a bearing (17) being made on the sub-seat tube (4), in which the swivels (18) are pivoted so that their longer sections are praying above and in the direction of the arms (7) and the shorter arms are forward towards the head (3), while the front ends of the swing arms (18) are supported by a spring (12) and a damper (13), which are arranged at opposite ends at any point on the frame (1), and the rear ends of the swing arms (18) are pivotally connected to the swing arms (19), the lower ends of which are pivotally connected to the rear ends of the arms (7). , wherein the free sections of the swings (19) are made above the swivel mounting (18) with the rear wheel mounting brackets (16).

Wheel frame (1) according to claim 1, characterized in that the rear forks (2) are arranged and fixed to the frame (1) such that the lower arms (7) are made in the sense of the letter L so that they are free the ends of the upright sections pivotably mounted approximately in the middle of the sub-seat tube (4) in the bearing (20) so that the forward-facing brackets (21) are connected to the two ends of the legs (7) and are connected to the masts (22) at their free ends. bearings (23), the masts (22) having their opposite ends pivotally supported by the bearings (24) above the bearing (20) on the sub-tube (4) or elsewhere on the frame (1) and at the same time the bracket (21) is supported to the spring (12) and the damper (13), which are arranged at opposite ends at any point on the frame (1) and the rear wheel is mounted at the rear ends of the arms (7).

Wheel frame (1) according to claim 1, characterized in that the rear forks (2) are made and mounted on the frame (1) so that they are made of two lower arms (7), which are formed as supporting letters L and are pivotally mounted above the driving axle (9) on their sub-axis in their sub-seat tube (4), the arms (7) being connected to the swingarm (26) by their shorter, downward-directed sections via the mast (25), which is mounted on section (5) of the frame (1), the swingarm (26) being opposite

29068. doc / IX-03 / D-33-Vr finally resting on a spring (12) and a damper (13), which can be mounted anywhere on the frame (1), the forks (2) are further made from the upper arms (27) , which are pivotally mounted in a bearing (28) on the one-end sub-seat tube (4), and are pivotally connected to the ends (7) by means of an element (29) such that the adjacent arms (7) and the upper arms ( 27) cross, with a rear wheel seat (16) in the elements (29).