EP0289524A1 - Fourche ou element amortisseur pour cyclomoteurs ou motocyclettes - Google Patents

Fourche ou element amortisseur pour cyclomoteurs ou motocyclettes

Info

Publication number
EP0289524A1
EP0289524A1 EP87904930A EP87904930A EP0289524A1 EP 0289524 A1 EP0289524 A1 EP 0289524A1 EP 87904930 A EP87904930 A EP 87904930A EP 87904930 A EP87904930 A EP 87904930A EP 0289524 A1 EP0289524 A1 EP 0289524A1
Authority
EP
European Patent Office
Prior art keywords
chamber
double
piston
rod
rods
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.)
Withdrawn
Application number
EP87904930A
Other languages
German (de)
English (en)
Inventor
Mauro Negrini
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.)
NEGRINI MOTO SpA
Original Assignee
NEGRINI MOTO SpA
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 NEGRINI MOTO SpA filed Critical NEGRINI MOTO SpA
Publication of EP0289524A1 publication Critical patent/EP0289524A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/06—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/08—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms for front wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction

Definitions

  • the present invention concerns a dampening fork or strut for motorbicycles or motorcycles, i.e. a new kind of front or back fork, in this last case also a single central strut that may be applied to motorbicycles or to motorcycles, in particu ⁇ lar also to the "outboard" kind.
  • the prior art known until now comprises forks and struts for motorcycles with a single rod, each rod being internally pro ⁇ vided with a spring that sownwardly pushes a piston provided with small passing-through holes for the dripping of the " oil contained in the lower part of said fork or strut: this for dampening the impacts.
  • dan ⁇ gerous twistings may not be prevented, in particular in those cases in which ery long forks or struts are used ' , and fur- thermore annoying and damaging vibrations, in particular of the forecarriage.
  • an arcuated cross member was used for limiting the twisting in the forks, placed immediately above the sur- face of the tyre of the wheel: such a cross member is howe ⁇ ver subject to dangerous inconveniences like mud or other elements, such as to block the wheel. These inconveniences may be avoided, eliminating the cross member and greatly reducing the twistings and the vibrations.
  • the aim set forth is reached, according to the present in ⁇ vention, making use, instead of one single rod, of two rods having the axis thereof placed on a longitudinal vertical plane,i.e. aligned in the driving direction: in the case of a fork, there will be four rods; of the two longitudinally aligned rods, one compresses the oil by means of *a piston, the other one is provided with another piston acting on the mixture consisting of the air contained in the respective chamber and of the oil flowing through a valve.
  • the advantages obtained by means of the present invention are the following: the elimination, or a strong reduction of the possibility of twisting; the elimination or strong reduction of the vibrations; reduction of the sinking; and a greater safety againts those deformations which in any case cause lack of balance.
  • Figure 1 shows a front view of the front fork
  • figure 2 shows a lateral view in partial section of the fork according to figure 1
  • figure 3 shows an enlarged sectioned detail of figure 2 for putting into evidence the lower part of a branch of the fork
  • figure 4 shows a section like the one of figure 3, rela ⁇ ting to a variant in which one of the two align ⁇ ed rods has a smaller diameter
  • figure 5 shows a plant view, enlarged and partially sec ⁇ tioned, of figure 1
  • figure 6 shows a lateral scheme of a motorcycle with the fork according to the present invention frontal- ly applied, while at the back there is applied • a couple of lateral dampers of the kind of those shown in longitudinal section of figure 7
  • figures 8, 9 and 10 are the cross sections respectively:
  • 1 shows the couple of front rods of the front fork, said rods being telescopically sliding inside the couple of double lower tubolar elements 2, lowerly ap- plied to the axis of the front wheel, not shown, through the couple of horizontal holes transversally aligned 3 of lower heads 3' of the fork; 4 and 5 show a couple of transversal trapezoidal plates (figure 5), respectively lower and upper, each provided with a couple of front holes 6 for blocking in the same the couple of front rods 1; 7 (figures 2, 5) shows a couple of back holes of said plates for the blocking in the same of the couple of back rods 8; 9 shows a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Abstract

La fourche amortisseuse décrite se compose d'au moins deux tiges (1, 8) coulissant de façon téléscopique à l'intérieur d'un élément tubulaire double (2) pourvu de chambres respectives (25, 28) comportant un axe sur un seul et même plan longitudinal vertical. L'une des deux chambres (25) est remplie d'une huile poussée par un piston (21), alors que l'autre chambre (28) est munie d'un piston (39) qui agit sur le mélange air-huile qui s'écoule à travers une ouverture (26) commandée par un obturateur réglable (29) relié à une soupape unidirectionnelle (33). Un ressort (14) est inséré dans la première tige dans sa partie supérieure, alors que l'autre tige (38) est insérée dans la partie inférieure de la chambre (28) qui contient le mélange air-huile.
EP87904930A 1986-11-07 1987-07-28 Fourche ou element amortisseur pour cyclomoteurs ou motocyclettes Withdrawn EP0289524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4012086 1986-11-07
IT40120/86A IT1200340B (it) 1986-11-07 1986-11-07 Forcella o puntone ammortizzante per ciclomotore e motocicletta

Publications (1)

Publication Number Publication Date
EP0289524A1 true EP0289524A1 (fr) 1988-11-09

Family

ID=11248463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904930A Withdrawn EP0289524A1 (fr) 1986-11-07 1987-07-28 Fourche ou element amortisseur pour cyclomoteurs ou motocyclettes

Country Status (4)

Country Link
EP (1) EP0289524A1 (fr)
JP (1) JPH01501218A (fr)
IT (1) IT1200340B (fr)
WO (1) WO1988003493A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5782313A (en) * 1991-11-01 1998-07-21 Yamaha Hatsudoki Kabushiki Kaisha Double swing arm motorcycle front suspension
JP3381961B2 (ja) * 1993-03-18 2003-03-04 株式会社ショーワ 自転車用車輪懸架装置
US5367918A (en) * 1993-12-28 1994-11-29 Chang; Wu-Sung Bicycle front fork shock absorbing device
JP4679044B2 (ja) * 2002-07-29 2011-04-27 エフ．ウィマー マーティン 前輪サスペンションシステム及びその方法
DE10353349B4 (de) * 2003-11-14 2009-12-10 Neander Motors Ag Teleskopgabel für lenkbare Vorderräder von Fahrzeugen
US7469914B2 (en) 2004-08-06 2008-12-30 Aircell Engineering, Inc. Control system for motorcycle fork
JP6169886B2 (ja) * 2013-05-09 2017-07-26 Ｋｙｂ株式会社 懸架装置
JP6463934B2 (ja) * 2014-09-29 2019-02-06 Ｋｙｂ株式会社 サスペンション装置
WO2025262265A1 (fr) 2024-06-21 2025-12-26 Etablissement Francais Du Sang Molécules chimériques comprenant un anticorps anti-fibrine et une molécule antithrombotique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB599425A (en) * 1944-08-07 1948-03-11 John Geoffrey Davis Shock absorber mounting for vehicles
US1836381A (en) * 1928-11-12 1931-12-15 Mcnab Absorbolift Inc Shock absorber
US2122407A (en) * 1937-03-15 1938-07-05 Houde Eng Corp Hydraulic shock absorber
GB706865A (en) * 1951-08-29 1954-04-07 Carl Jurisch Improvements in or connected with spring wheel suspension of vehicles
NL7407263A (en) * 1974-05-30 1975-12-02 Yamaha Motor Nv Motor cycle front wheel fork - has two telescopic legs supported off frame and pivotably connected with common hydraulic shock absorber
US3989261A (en) * 1975-07-24 1976-11-02 Honda Giken Kogyo Kabushiki Kaisha Motorcycle front-wheel suspension with means for restraint of compression of a telescopic front upon braking
FR2503082A1 (fr) * 1981-04-07 1982-10-08 Eric Offenstadt Suspension de roue, notamment pour motocyclette

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8803493A1 *

Also Published As

Publication number Publication date
IT8640120A0 (it) 1986-11-07
WO1988003493A1 (fr) 1988-05-19
IT1200340B (it) 1989-01-12
JPH01501218A (ja) 1989-04-27

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19880616

AK Designated contracting states

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Effective date: 19891124

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18D Application deemed to be withdrawn

Effective date: 19900201