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FR2978723A1 - Suspension system for two-wheeled vehicle i.e. mountain bicycle, has upper tube and lower tube that are collinear and separated by separator, and piston allowed to slide in lower tube, where upper and lower tubes are fixed in separator - Google Patents

Suspension system for two-wheeled vehicle i.e. mountain bicycle, has upper tube and lower tube that are collinear and separated by separator, and piston allowed to slide in lower tube, where upper and lower tubes are fixed in separator Download PDF

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Publication number
FR2978723A1
FR2978723A1 FR1102456A FR1102456A FR2978723A1 FR 2978723 A1 FR2978723 A1 FR 2978723A1 FR 1102456 A FR1102456 A FR 1102456A FR 1102456 A FR1102456 A FR 1102456A FR 2978723 A1 FR2978723 A1 FR 2978723A1
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FR
France
Prior art keywords
tube
separator
lower tube
piston
collinear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR1102456A
Other languages
French (fr)
Inventor
Romain Boireaux
Pierre Geoffroy Plantet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHIFT UP ENGINEERING
Original Assignee
SHIFT UP ENGINEERING
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHIFT UP ENGINEERING filed Critical SHIFT UP ENGINEERING
Priority to FR1102456A priority Critical patent/FR2978723A1/en
Publication of FR2978723A1 publication Critical patent/FR2978723A1/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62KCYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00Axle suspensions
    • B62K25/04Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/06Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/08Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms for front wheel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The system has an upper tube (4a) and a lower tube (4b) that are collinear and separated by a separator (6). A piston (5) is allowed to slide in the lower tube. The upper tube and the lower tube are fixed in the separator. A set of plungers (1a) is allowed to slide in a set of sleeves (2a). The sleeves are connected to a wheel of a two-wheeled vehicle i.e. mountain bicycle. The piston is connected to the sleeves inside the plungers.

Description

1 L'invention concerne une suspension pour véhicule à deux roues comme un vélo dont la partie supérieure translate par rapport à la partie inférieure. The invention relates to a suspension for two-wheeled vehicles such as a bicycle whose upper part translates relative to the lower part.

Sur les vélos tout terrain (VTT), la suspension avant permet d'augmenter le confort du cycliste et l'adhérence des roues au sol, notamment durant la circulation sur un terrain accidenté. On mountain bikes, the front suspension makes it possible to increase the cyclist's comfort and the grip of the wheels on the ground, especially during traffic on rough terrain.

On connaît des suspensions qui contiennent deux plongeurs pouvant respectivement coulisser à l'intérieur de deux fourreaux qui eux sont reliés à la roue. Un plongeur est alors coaxial au fourreau qui lui est associé. Une partie hydraulique permet de ralentir le mouvement de la suspension, voire de bloquer ce mouvement pour éviter les oscillations provoquées par le pédalage du cycliste. De même, une partie pneumatique permet d'avoir le même effet qu'un ressort en comprimant de l'air. Ce type de partie hydraulique, respectivement pneumatique, est généralement composé d'un tube rempli d'huile, respectivement d'air, situé à l'intérieur du plongeur et fixé en haut de celui-ci, et d'un piston fixé en bas du fourreau qui peut coulisser dans ledit tube et ainsi laminer l'huile qui s'y trouve, respectivement comprimer l'air qui s'y trouve. Le laminage de l'huile provoque alors le ralentissement de la suspension et la compression de l'air permet à la suspension de revenir dans sa position initiale. Suspensions are known which contain two plungers which can respectively slide inside two sleeves which are connected to the wheel. A diver is then coaxial with the sheath associated with it. A hydraulic part makes it possible to slow down the movement of the suspension, or even to block this movement to avoid the oscillations caused by the cyclist's pedaling. Likewise, a pneumatic part makes it possible to have the same effect as a spring by compressing air. This type of hydraulic part, respectively pneumatic, is generally composed of a tube filled with oil, respectively air, located inside the plunger and fixed at the top thereof, and a piston fixed at the bottom. the sleeve which can slide in said tube and thus roll the oil therein, respectively compress the air therein. The rolling of the oil then causes the slowing down of the suspension and the compression of the air allows the suspension to return to its initial position.

Ce type de suspension ne donne pas entière satisfaction, en ce que les chocs subis par la suspension ont tendance à provoquer une flexion et par conséquent une flèche sur l'ensemble plongeur et fourreau dans la direction orthogonale au mouvement de coulissage du plongeur dans le fourreau. La déformation maximale se retrouve en haut des plongeurs, car ce sont les zones les plus éloignées de l'axe de la roue. Le tube de la partie hydraulique étant fixé en haut du plongeur et le piston étant fixé en bas du fourreau, la déformation du plongeur et du fourreau implique alors des efforts sur le tube et le piston. Ces efforts entraînent des frottements et de l'usure entre le piston et le tube. This type of suspension is not entirely satisfactory, in that the shocks suffered by the suspension tend to cause bending and consequently an arrow on the plunger and sheath assembly in the direction orthogonal to the sliding movement of the plunger in the sheath. . The maximum deformation is found at the top of the divers, because these are the zones furthest away from the axis of the wheel. The tube of the hydraulic part being fixed at the top of the plunger and the piston being fixed at the bottom of the sleeve, the deformation of the plunger and the sheath then involves forces on the tube and the piston. These forces cause friction and wear between the piston and the tube.

Pour pallier ces inconvénients, on connaît notamment des suspensions dont le tube n'est pas fixé sur le plongeur, mais en liaison rotule. De même, le piston 2 est en liaison rotule avec le fourreau, au lieu d'être fixé. Ceci permet alors d'éliminer les frottements et l'usure entre le piston et le tube. To overcome these drawbacks, suspensions are known in particular, the tube of which is not fixed to the plunger, but in a ball joint connection. Similarly, the piston 2 is in ball joint connection with the sheath, instead of being fixed. This then eliminates friction and wear between the piston and the tube.

Cependant, ces suspensions ne permettent pas de pallier de façon satisfaisante aux problèmes de frottements et d'usure. Les liaisons rotule sont en effet compliquées à réaliser, onéreuses, lourdes, de plus elles limitent l'accès au tube ou à la tige pour des réglages extérieurs. However, these suspensions do not sufficiently overcome the problems of friction and wear. The ball joints are indeed complicated to perform, expensive, heavy, more they limit access to the tube or rod for external settings.

L'invention vise à perfectionner l'art antérieur en proposant notamment un système de suspension pour véhicule à deux roues, ledit système ayant une partie hydraulique et/ou pneumatique, ledit système comprenant un tube supérieur et un tube inférieur, lesdits tubes étant colinéaires et séparés par un séparateur, et un piston qui coulisse dans le tube inférieur, le tube supérieur et le tube inférieur étant emmanchés dans le séparateur. The invention aims to improve the prior art by proposing in particular a suspension system for a two-wheeled vehicle, said system having a hydraulic and / or pneumatic part, said system comprising an upper tube and a lower tube, said tubes being collinear and separated by a separator, and a piston which slides in the lower tube, the upper tube and the lower tube being fitted into the separator.

Dans un mode de réalisation préféré de l'invention, le tube supérieur et le séparateur sont réalisés de telle sorte qu'il y a un jeu entre eux. In a preferred embodiment of the invention, the upper tube and the separator are made such that there is a clearance between them.

Dans un autre mode de réalisation préféré de l'invention, le tube inférieur et le séparateur sont réalisés de telle sorte qu'il y a un jeu entre eux. In another preferred embodiment of the invention, the lower tube and the separator are made such that there is a clearance between them.

Dans un autre mode de réalisation préféré de l'invention, d'une part le tube inférieur et le séparateur sont réalisés de telle sorte qu'il y a un jeu entre eux i et d'autre part le tube supérieur et le séparateur sont réalisés de telle sorte qu'il y a un jeu entre eux. In another preferred embodiment of the invention, on the one hand the lower tube and the separator are made so that there is a clearance between them i and on the other hand the upper tube and the separator are made so that there is a game between them.

Le séparateur en soi, ainsi que le jeu entre la partie inférieure du tube et le séparateur, et/ou celui entre la partie supérieure du tube et le séparateur, permettent de donner une liberté angulaire entre les deux parties de tube. La majeure partie des déformations se produisant sur la partie supérieure du plongeur, cette liberté angulaire permet de s'affranchir des contraintes dans la partie inférieure du tube et donc de limiter les frottements et l'usure avec le 3 piston. Ceci tout en restant simple à réaliser et tout en permettant un accès facile au tube ou à la tige. The separator itself, and the clearance between the lower part of the tube and the separator, and / or between the upper part of the tube and the separator, allow to give angular freedom between the two tube parts. Most of the deformations occurring on the upper part of the plunger, this angular freedom makes it possible to overcome the constraints in the lower part of the tube and thus to limit friction and wear with the piston. This while remaining simple to achieve and while allowing easy access to the tube or rod.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence aux figures annexées, dans lesquelles : - la figure 1 représente une vue en coupe longitudinale d'une suspension telle que présente dans l'état de la technique ; - la figure 2 représente la manière dont les contraintes apparaissent sur les plongeurs et les fourreaux, dans le cas d'une suspension quelconque : les figures 3a et 3b représentent une vue en coupe de l'invention respectivement lorsque la suspension est au repos et lorsqu'elle subit une déformation ; En relation avec la figure 1, on décrit ci-dessous une suspension telle que rencontrée dans l'état de la technique, qui comprend des plongeurs 1 a et lb qui coulissent dans des fourreaux 2a et 2b qui sont reliés à la roue 3. A l'intérieur du plongeur la, se trouve le tube 4 dans lequel coulisse le piston 5 qui lui est relié au fourreau 2a. Other features and advantages of the invention will appear in the description which follows, made with reference to the appended figures, in which: - Figure 1 shows a longitudinal sectional view of a suspension as present in the state of the technical; FIG. 2 represents the manner in which the stresses appear on the plungers and the sleeves, in the case of any suspension: FIGS. 3a and 3b represent a sectional view of the invention respectively when the suspension is at rest and when it undergoes a deformation; In relation to FIG. 1, a suspension as described in the state of the art, which comprises divers 1a and 1b that slide in sleeves 2a and 2b which are connected to the wheel 3a, is described below. inside the plunger la, is the tube 4 in which slides the piston 5 which is connected to the sheath 2a.

La figure 2 représente une vue schématique de la suspension et de la roue lorsque celle-ci subit un choc au point A. La force F qui est créée par le choc est colinéaire au segment [AR]. Cette force se décompose en une résultante colinéaire à l'axe des plongeurs et fourreaux 1+2 et une résultante F1 orthogonale à l'axe des plongeurs et fourreaux 1+2. Cette résultante FI créé alors une déformation sur les plongeurs et les fourreaux 1+2. Cette déformation créé une courbure des plongeurs et fourreaux 1+2. Cette courbure se répercute sur le tube 4 et le piston 5, ce qui traduit par du frottement et de l'usure entre ceux-ci. FIG. 2 represents a schematic view of the suspension and the wheel when it is impacted at point A. The force F which is created by the impact is collinear with the segment [AR]. This force decomposes into a collinear resultant to the axis of the plungers and ducts 1 + 2 and a resultant F1 orthogonal to the axis of the plungers and ducts 1 + 2. This FI resultant then creates a deformation on the divers and the 1 + 2 sleeves. This deformation creates a curvature of the divers and sheaths 1 + 2. This curvature is reflected on the tube 4 and the piston 5, which results in friction and wear between them.

Sur la figure 3a, le tube 4 est séparé en une partie supérieure 4a et une partie inférieure 4b. Entre ces deux parties se trouve le séparateur 6, dans lequel sont 4 emmanchés avec du jeu les deux parties de tube 4a et 4b. Le piston 5 coulisse alors dans la partie inférieure du tube 4b. Sur la figure 3b, on retrouve ces mêmes éléments dans la situation où la force FI est appliquée au niveau de l'axe de la roue 3. La déformation est plus importante au niveau du haut du plongeur 1 a, car c'est la partie la plus éloignée de la force FI et donc la zone où il y a le plus grand moment fléchissant. Le séparateur 6 -ainsi que le jeu entre le séparateur 6 et les tubes 4a et 4b-permet alors d'avoir une liberté angulaire qui évite de propager la déformation du plongeur la au tube inférieur 4b dans lequel coulisse le piston 5. Cela limite ~o donc les frottements et l'usure entre le tube inférieur 4b et le piston 5. In FIG. 3a, the tube 4 is separated into an upper part 4a and a lower part 4b. Between these two parts is the separator 6, in which are 4 fitted with play the two parts of tube 4a and 4b. The piston 5 then slides in the lower part of the tube 4b. In FIG. 3b, these same elements are found in the situation where the force F1 is applied at the level of the axis of the wheel 3. The deformation is greater at the top of the plunger 1a, since this is the part the farthest from the IF force and thus the area where there is the greatest flexing moment. The separator 6 -asi that the clearance between the separator 6 and the tubes 4a and 4b-then allows an angular freedom that avoids propagating the deformation of the plunger la to the lower tube 4b in which the piston slides 5. This limits ~ o therefore friction and wear between the lower tube 4b and the piston 5.

Claims (3)

REVENDICATIONS1. Système de suspension pour véhicule à deux roues, ledit système ayant une partie hydraulique et/ou pneumatique, ledit système comprenant un tube supérieur 4a et un tube inférieur 4b, lesdits tubes étant colinéaires et séparés par un séparateur 6, et un piston 5 qui coulisse dans le tube inférieur 4b, caractérisé en ce que le tube supérieur 4a et le tube inférieur 4b sont emmanchés dans le séparateur 6. REVENDICATIONS1. Suspension system for a two-wheeled vehicle, said system having a hydraulic and / or pneumatic part, said system comprising an upper tube 4a and a lower tube 4b, said tubes being collinear and separated by a separator 6, and a sliding piston 5 in the lower tube 4b, characterized in that the upper tube 4a and the lower tube 4b are fitted into the separator 6. 2. Système de suspension selon la revendication 1, caractérisé en ce que ladite suspension présente un jeu entre le séparateur 6 et le tube supérieur 4a. 2. suspension system according to claim 1, characterized in that said suspension has a clearance between the separator 6 and the upper tube 4a. 3. Système de suspension selon les revendication 1 ou 2, caractérisé en ce que ladite suspension présente un jeu entre le séparateur 6 et le tube inférieur 4b. 3. Suspension system according to claim 1 or 2, characterized in that said suspension has a clearance between the separator 6 and the lower tube 4b.
FR1102456A 2011-08-04 2011-08-04 Suspension system for two-wheeled vehicle i.e. mountain bicycle, has upper tube and lower tube that are collinear and separated by separator, and piston allowed to slide in lower tube, where upper and lower tubes are fixed in separator Pending FR2978723A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1102456A FR2978723A1 (en) 2011-08-04 2011-08-04 Suspension system for two-wheeled vehicle i.e. mountain bicycle, has upper tube and lower tube that are collinear and separated by separator, and piston allowed to slide in lower tube, where upper and lower tubes are fixed in separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1102456A FR2978723A1 (en) 2011-08-04 2011-08-04 Suspension system for two-wheeled vehicle i.e. mountain bicycle, has upper tube and lower tube that are collinear and separated by separator, and piston allowed to slide in lower tube, where upper and lower tubes are fixed in separator

Publications (1)

Publication Number Publication Date
FR2978723A1 true FR2978723A1 (en) 2013-02-08

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FR1102456A Pending FR2978723A1 (en) 2011-08-04 2011-08-04 Suspension system for two-wheeled vehicle i.e. mountain bicycle, has upper tube and lower tube that are collinear and separated by separator, and piston allowed to slide in lower tube, where upper and lower tubes are fixed in separator

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030193161A1 (en) * 2002-04-10 2003-10-16 Maverick American Llc Telescoping suspension fork having a quick release wheel axle clamp
US20070090624A1 (en) * 2005-10-25 2007-04-26 Hui-Hsiung Chen Travel adjustable front suspension fork
DE102006009677A1 (en) * 2006-03-02 2007-09-06 Gustav Magenwirth Gmbh & Co. Kg Telescopic fork in particular of motorcycle, comprises shock absorbing element movable joined to upper or lower end of inner and outer tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030193161A1 (en) * 2002-04-10 2003-10-16 Maverick American Llc Telescoping suspension fork having a quick release wheel axle clamp
US20070090624A1 (en) * 2005-10-25 2007-04-26 Hui-Hsiung Chen Travel adjustable front suspension fork
DE102006009677A1 (en) * 2006-03-02 2007-09-06 Gustav Magenwirth Gmbh & Co. Kg Telescopic fork in particular of motorcycle, comprises shock absorbing element movable joined to upper or lower end of inner and outer tube

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