EP1159186A1 - Fourche elastique et bicyclette, moto ou tricycle dotes d'une fourche elastique - Google Patents

Fourche elastique et bicyclette, moto ou tricycle dotes d'une fourche elastique

Info

Publication number
EP1159186A1
EP1159186A1 EP00901514A EP00901514A EP1159186A1 EP 1159186 A1 EP1159186 A1 EP 1159186A1 EP 00901514 A EP00901514 A EP 00901514A EP 00901514 A EP00901514 A EP 00901514A EP 1159186 A1 EP1159186 A1 EP 1159186A1
Authority
EP
European Patent Office
Prior art keywords
suspension fork
fork according
bearing bush
bearing
suspension
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Withdrawn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
EP00901514A
Other languages
German (de)
English (en)
Inventor
Richard Heydenreich
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.)
Univega Bikes and Sports Europe GmbH
Original Assignee
Univega Bikes and Sports Europe GmbH
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 Univega Bikes and Sports Europe GmbH filed Critical Univega Bikes and Sports Europe GmbH
Publication of EP1159186A1 publication Critical patent/EP1159186A1/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Withdrawn legal-status Critical Current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 SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B62K21/18—Connections between forks and handlebars or handlebar stems
    • B62K21/20—Connections between forks and handlebars or handlebar stems resilient

Definitions

  • the invention relates to a suspension fork according to the preamble of claim 1 and a bicycle, motorcycle, tricycle or similar vehicle provided with the suspension fork according to the invention.
  • the invention relates to a suspension fork, in which the spring movement takes place within the so-called control head and which has a play-adjustable bearing in a novel manner.
  • So-called telescopic suspension forks are known as prior-use objects for two-wheeled vehicles of any type, in which the front wheel is mounted in two mutually parallel telescopic guides.
  • the telescopic guides are in turn connected to the control axis by at least one so-called fork bridge.
  • suspension forks are known as prior-use objects, in which a central telescopic guide is arranged within the frame control head. Appropriate measures must be taken to ensure that spring movements and the desired turning movements when steering are independent of one another can be done.
  • the latter type has advantages in terms of torsional stiffness, weight and a harmonious, bike-typical appearance.
  • a play-free transmission of the steering movement to the front wheel is essential for a completely satisfactory function.
  • a solution is known as a prior use, in which a multi-edged steerer tube is guided to move longitudinally in rolling bearings.
  • the guides can be adjusted without play.
  • such an embodiment is comparatively heavy, expensive, maintenance-intensive and requires a high level of production expenditure.
  • Another known solution provides a longitudinally toothed steerer tube which is guided in a plastic bushing which is also toothed.
  • the manufacturing effort is lower.
  • freedom from backlash can only be complied with to a limited extent during manufacture and in particular as a result of wear.
  • a suspension fork according to the preamble of claim 1 is known from DE-OS 15 05 232 and has a longitudinally toothed steerer tube which is guided against rotation in a correspondingly shaped bearing bush.
  • the bearing bush is in turn mounted in a guide tube rotatably mounted in the control head.
  • No. 5,509,676 discloses an adjustable friction damper in which an axial preload of an elastic ring is adjusted by means of a preload sleeve, so that the wall friction is increased compared to the steerer tube.
  • the invention has for its object to provide a suspension fork in which the game can be readjusted and adjusted over a long period of time and which ensures satisfactory suspension comfort with little production and maintenance effort.
  • the bearing bush in which the fork sheep tube is mounted is made elastic. Furthermore, the bearing bush can be reduced radially, as a result of which the play can be changed, ie adjusted or adjusted.
  • These measures can be used on the one hand a bearing bush that can be manufactured with comparatively little production effort and, moreover, does not require a high level of maintenance. This always ensures good guidance of the components of the suspension fork. Due to the fact that the bearing bush of the suspension fork according to the invention can be radially reduced on the other hand, this can be radially reduced by suitable measures, for example after wear and tear which leads to undesired play between the components which are brought into one another, so that the play can be adjusted.
  • the elastic and radially shrinkable bearing bush can be reduced in such a way that there is play-free storage even after wear. This is not compared to the known arrangements Excessively larger installation space is required, so that the suspension fork according to the invention also offers advantages in this regard.
  • the radial reduction in size of the bearing bush can be produced in that the bearing bush is mounted in the guide tube with a conical bearing seat. Furthermore, a pressure ring or a similar component is provided which axially displaces the bearing bush. By moving the elastic bearing bush in the direction of the smaller diameter of the conical bearing seat, the guide bushing is radially reduced and the play can be adjusted.
  • the bearing bush can be designed essentially cylindrical and can be reduced radially by a pressure ring provided with an inner cone.
  • the pressure ring provided with the inner cone preferably acts on a slotted guide tube.
  • a further development of the invention has proven to be advantageous, in which a slotted guide tube is also provided, on which a tensioning clamp or a tensioning band acts. Since the bearing bush is rotatably supported in the guide tube, it is radially reduced by the radial reduction of the guide tube, and that Game is adjusted according to the invention, as far as desired.
  • an upper guide bearing is designed to be elastic on the steerer tube or is supplemented by an elastic ring which can be axially preloaded with different pressure. As a result, the wall friction relative to the steerer tube is changed and the damping effect generated can be adjusted.
  • an embodiment has proven to be favorable in which a relatively rigid guide bush ensures the exact central position of the steerer tube and thus prevents tilting.
  • An additional, relatively soft elastic ring which is axially more or less pre-tensioned, then takes over the exact play reduction or the damping setting. It can be controlled and fixed, for example, by means of a pre-tensioning sleeve, which is adjustable from the outside and provided with grids.
  • the biasing sleeve is preferably adjustable from the outside by means of a thread.
  • a particularly favorable damping effect can finally be obtained if additionally in the upper guide bearing a hydraulic vibration damper is provided for or instead of the elastic ring.
  • At least one of the friction partners in particular the guide components that are movable with respect to one another, is preferably coated with a special friction-reducing running layer.
  • a bicycle, a motorcycle, a tricycle or a similar vehicle which has the suspension fork according to the invention in one of the embodiments described above.
  • Fig. 1 is a sectional view through the control head of a
  • Fig. 2 is a sectional view through the control head of a
  • Fig. 3 is a sectional view through the control head of a
  • Fig. 4 is a sectional view through the control head of a
  • Fig. 5 is a sectional view through the control head of a
  • the suspension fork according to the invention is a partially known so-called "central suspension fork", in which a so-called guide tube 3 is mounted in a control head 5 formed on the frame of a bicycle via ball bearings 4, which can be slotted.
  • a bearing bush 2 is seated in the guide tube 3 against rotation, in the case shown by means of so-called guide lugs 9.
  • a polygonal steerer tube 1 or a multi-spline shaft is guided so as to prevent rotation in the longitudinal direction.
  • the bearing bush 2 can advantageously consist of a plastic injection-molded part which interacts with the steerer tube 1 in a low-noise and low-friction manner even with insufficient lubrication.
  • the fundamental disadvantage here is that the summation of unavoidable manufacturing tolerances and always occurring wear an inaccurate and insensitive steering can arise.
  • the bearing bush 2 of the suspension fork according to the invention can be reduced radially.
  • it is elastic on the one hand.
  • it is conically shaped and consequently supported in the guide tube 3 via a conical bearing seat provided on its outer circumference.
  • the bearing bush 2 is radially reduced by an axial displacement of the bearing bush 2 according to FIG. 1, that is to say “further” into the guide tube 3, and the play can be set exactly and can be switched off as far as desired.
  • Such an adjustment is possible up to a pretension in which vibration damping is effected.
  • the axial displacement of the bearing bush 2 takes place in the embodiment shown by a so-called pressure ring 6, which is screwed onto the guide tube 3 by means of a thread.
  • the pressure ring is preferably provided with a fine thread and, in the exemplary embodiment shown, can be fixed in any position with the lock nut 8.
  • the road forces are supported and suspended by a spring 10, which is preferably made of steel, or, alternatively, by an elastomer on the upper spring bearing 11.
  • the suspension and damping properties of the suspension fork according to the invention are advantageously supplemented thereby that the upper guide by a combination of a cylindrical guide bush 12 and an elastic ring 13 is accomplished.
  • injection molded or cast plastic bushings have a comparatively high manufacturing tolerance.
  • the deformable second guide ring 13 is used to adjust the play in this area.
  • the elastic ring 13 is supported at the bottom by a ring 17 mounted on a shoulder of the guide tube 3.
  • the inner diameter of the elastic ring 13 can be changed to a certain extent by an axial prestress.
  • the game and the wall friction, which also causes damping can be varied as desired. In the case shown, this is accomplished by a pressure sleeve 14.
  • this pressure sleeve 14 In order to prevent this pressure sleeve 14 from being inadvertently adjusted, it is secured against unwanted twisting either by a catch 16 or by clamping by means of the handlebar stem 22.
  • Reference number 18 denotes a guide ring in the upper region of the steerer tube 1.
  • the area designated by reference number 23 is an air space, the mode of operation of which is described below in connection with FIG. 4.
  • 21 denotes a clamping piece to which the handlebar is attached.
  • the reference number 20 denotes the fork formed below the steerer tube 1, in which the wheel is rotatably mounted in a known manner. With 19 a stop is designated which limits the maximum spring travel of the guide tube 3 downwards.
  • the areas of the suspension fork according to the invention described last are the same as the embodiment of FIG. 1, so that the description thereof is omitted in detail.
  • the embodiment of FIG. 2 differs from the first embodiment in how the play adjustment of the bearing bush is realized.
  • the guide bush 24 is largely cylindrical in shape.
  • a radial reduction in order to reduce the play with the steerer tube 1 is ensured in this case in that a conical pressure ring 25, which has an inner cone, acts on a guide tube 3, which is slotted in this case, and this is stronger upward during a screwing movement according to FIG. 2 squeezing.
  • the slotted guide tube 3 thus shrinks in the radial direction and brings about a radial reduction in the size of the bearing bush 24, so that the clearance between the bearing bush 24 and the steerer tube can also be adjusted and adjusted in this case.
  • This function is also ensured in the third embodiment shown in FIG. 3.
  • this is done by reducing the diameter of the guide tube 3 by means of a clamping band or the slotted clamping clip 27 shown with a clamping screw 28.
  • This reduction in the diameter of the guide tube 3 also brings about a radial reduction in the size of the bearing bush 24, which in the case shown is largely cylindrical, so that this embodiment of the invention also makes it possible to adjust the play.
  • the bearing bush 3 is secured downwards against slipping out by a snap ring 26.
  • FIG. 4 shows a further development of the first embodiment of the invention shown in FIG. 1.
  • the lower region of the guide of the suspension fork according to the invention is designed in accordance with the embodiment of FIG. 1, so that the detailed description in this context is omitted.
  • the upper region of the suspension fork according to the invention is modified in the following way. If the guide ring 13 is to be used specifically for damping control, in addition to mechanical longitudinal tensioning, the use of an air spring support is also possible. It is advantageous here that small deflection movements result in only a slight increase in pressure and thus low damping forces. In contrast, a strong compression causes a large increase in the pressure in the air cushion and thus a stronger damping.
  • a suitable damper characteristic curve can be achieved by varying the air volume, the outlet pressure and the density and volume of the damping material. This leads to an effect similar to that of a hydraulic damper.
  • FIG. 5 shows the use of a hydraulic damper.
  • This effects the spring damping in a manner known per se and has the advantage that spring-in and spring-out movements can be damped independently of one another. Furthermore, the damping force increases as a function of the impact intensity.
  • the upper guide is taken over here only by a rigid or elastic bushing 12.
  • the damper 31 is fixed within the steerer tube 1, for example by snap rings 32 and 33.
  • the continuous piston rod 34 presses on the compression spring 10 via a spring plate 35, which also serves as a guide.
  • the upper end of the hollow-bore piston rod 34 acts with the aid of the screw 36 as tension and pressure support for the entire spring system.

Landscapes

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

Abstract

Une fourche élastique présente un dispositif d'amortissement central logé dans la tête de commande (5) d'un cadre de bicyclette. Un tube de fourche (1) à denture longitudinale ou conçu comme un polygone est guidé bloqué en rotation dans une douille (2) de forme correspondante. Cette douille (2) est, à son tour, montée bloquée en rotation dans un tube de guidage (3) monté pivotant dans la tête de commande (5). La douille (2) est également élastique et peut être radialement réduite, ce qui permet le réglage ultérieur du jeu.
EP00901514A 1999-01-08 2000-01-07 Fourche elastique et bicyclette, moto ou tricycle dotes d'une fourche elastique Withdrawn EP1159186A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19900416 1999-01-08
DE19900416A DE19900416A1 (de) 1999-01-08 1999-01-08 Federgabel für Fahrräder und ähnliche Fahrzeuge
PCT/EP2000/000085 WO2000040454A1 (fr) 1999-01-08 2000-01-07 Fourche elastique et bicyclette, moto ou tricycle dotes d'une fourche elastique

Publications (1)

Publication Number Publication Date
EP1159186A1 true EP1159186A1 (fr) 2001-12-05

Family

ID=7893759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00901514A Withdrawn EP1159186A1 (fr) 1999-01-08 2000-01-07 Fourche elastique et bicyclette, moto ou tricycle dotes d'une fourche elastique

Country Status (4)

Country Link
US (1) US20010045721A1 (fr)
EP (1) EP1159186A1 (fr)
DE (1) DE19900416A1 (fr)
WO (1) WO2000040454A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20010770A1 (it) * 2001-04-10 2002-10-10 Massimo Oteri Avantreno per motocicli con gruppo ammortizzatore perfezionato
US6997285B2 (en) * 2001-05-16 2006-02-14 Freudenberg-Nok General Partnership Shaft seal with lubrication device
US7931125B2 (en) * 2001-05-16 2011-04-26 Freudenberg-Nok General Partnership Shaft seal with lubrication device
US9085337B2 (en) * 2006-07-10 2015-07-21 Sram, Llc Bicycle suspension system
TWM427333U (en) * 2011-11-14 2012-04-21 Hsin Lung Accessories Co Steering limiter of front shock-absorbing fork
DE112015001076T5 (de) * 2014-03-03 2016-12-08 Darrell W. Voss Fahrzeug-Terrain-Nachführsysteme
US9994279B2 (en) * 2015-07-10 2018-06-12 Specialized Bicycle Components, Inc. Suspension assembly and bicycle having a suspension assembly
JP6524864B2 (ja) 2015-08-28 2019-06-05 スズキ株式会社 鞍乗り型車両の懸架構造
US11548587B2 (en) 2017-03-23 2023-01-10 Darrell W Voss Vehicle
WO2021163830A1 (fr) * 2020-02-17 2021-08-26 亚大国际企业股份有限公司 Bicyclette et sa structure d'absorbeur de chocs de fourche avant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB909446A (en) * 1960-02-18 1962-10-31 Moulton Consultants Ltd Improvements in spring suspensions for two-wheeled cycle vehicles
GB1047783A (en) * 1962-10-19 1966-11-09 Moulton Consultants Ltd Improvements in front suspensions for two-wheeled cycle vehicles
US5494302A (en) * 1991-06-11 1996-02-27 Cannondale Corporation Suspension assembly for a vehicle
JPH07205865A (ja) * 1994-01-26 1995-08-08 Daikin Mfg Co Ltd 自転車用ショックアブソーバ
DE29515660U1 (de) * 1995-09-30 1995-11-30 Elastogran Gmbh Fahrradfederung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0040454A1 *

Also Published As

Publication number Publication date
WO2000040454A8 (fr) 2001-04-12
US20010045721A1 (en) 2001-11-29
DE19900416A1 (de) 2000-07-13
WO2000040454A1 (fr) 2000-07-13

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