EP1924490A2 - Fourche de bicyclette a frein hydraulique integre - Google Patents

Fourche de bicyclette a frein hydraulique integre

Info

Publication number
EP1924490A2
EP1924490A2 EP06809317A EP06809317A EP1924490A2 EP 1924490 A2 EP1924490 A2 EP 1924490A2 EP 06809317 A EP06809317 A EP 06809317A EP 06809317 A EP06809317 A EP 06809317A EP 1924490 A2 EP1924490 A2 EP 1924490A2
Authority
EP
European Patent Office
Prior art keywords
bicycle fork
fork according
leg
braking
face
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Withdrawn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
EP06809317A
Other languages
German (de)
English (en)
Inventor
Leonardo Fioravanti
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.)
Fioravanti SRL
Original Assignee
Fioravanti SRL
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 Fioravanti SRL filed Critical Fioravanti SRL
Publication of EP1924490A2 publication Critical patent/EP1924490A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
    • B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
    • B62L1/10—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
    • 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
    • B62K21/02—Front wheel forks or equivalent, e.g. single tine
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/228—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0008—Brake supports
    • F16D2055/0012—Brake supports integral with vehicle suspension
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2127/00—Auxiliary mechanisms
    • F16D2127/08—Self-amplifying or de-amplifying mechanisms
    • F16D2127/10—Self-amplifying or de-amplifying mechanisms having wedging elements

Definitions

  • the present invention refers to a bicycle fork with integrated hydraulic brake, as specified in the preamble of claim 1.
  • a bicycle front fork of the above-indicated type is known from International Patent Application WO9013470.
  • the fork is provided with a hydraulic brake comprising a piston and cylinder unit, wherein the cylinder is fixed within a transverse through hole provided in one of the fork legs and the piston is slidably arranged in the cylinder and is controlled by a brake lever on the handlebar through a hydraulic connection line which runs within the handlebar and the steer tube of the fork and comes out through the outer side of the fork head.
  • the piston and cylinder unit is mounted in an upper end portion of the leg, substantially at the same height as the sidewalls of the wheel rim.
  • the hydraulic piston is provided, on its transversely inner side, that is, on the side facing the sidewall of the rim, with a friction member which is pressed against the sidewall of the rim upon operation of the brake by the user to apply the required braking force.
  • Figure 1 shows a front elevation view of a bicycle front fork according to a preferred embodiment of the invention
  • Figure 2 shows a side elevation view of the fork of Fig- ure 1 ;
  • Figure 3 shows a view from below of the fork of Figure 1, sectioned along line 3-3 of Figure 2;
  • Figure 4 shows a detailed perspective view of a braking hydraulic actuator of the fork of Figure 1.
  • a bicycle fork in this case a front fork, is generally indicated 10.
  • the fork 10 comprises in per-se-known manner a head 12, a steer tube 14 extending upwards from the head 12 to be inserted into a head tube (not shown) of the bicycle frame, and a pair of legs 16 (only one of which is illustrated in the figures, the other leg being identical to the illustrated one) which are joined at their upper ends to the head 14 and may be formed integrally with this latter.
  • the hub (not shown) of a bicycle wheel 18 is mounted at the lower ends of the legs (also not shown) .
  • the wheel 18 includes in per-se- known manner a rim 20 and a tyre 22 mounted on the rim 20.
  • the rim 20 has a pair of sidewalls which are substantially vertical or slightly inclined so as to converge towards the centre of the wheel 18 and have each a braking surface 20a.
  • the abutment surface 24 is directly formed by the leg 16.
  • Each flat abutment sur- face 24 is arranged at such a height that it faces the associated braking surface 20a and is preferably, though not necessarily, inclined by an angle OC ( Figure 3) with respect to a vertical plane ⁇ parallel to the middle plane of the wheel, that is, to the plane of symmetry of the fork, so as to converge forward, that is, in the driving direction of the bicycle.
  • the angle OC the function of which will be explained in the following part of the description, is preferably comprised between 0° and 5°, for example equal to 3°.
  • a pair of hydraulic actuators 26, forming the operating members of the hydraulic brake, are each mounted against a respective abutment surface 24.
  • the hydraulic actuators 26 as such are well-known components to the skilled man in the art and will not therefore be described in detail, if not as far those parts which are essential for understanding the invention are concerned.
  • Each hydraulic actuator 26 is made as a generally parallelepiped body having a pair of outer and inner longitudinal vertical flat faces 28 and 30, respectively, a lower horizontal flat face 32 and a pair of front and rear transverse vertical flat faces 34 and 36, respectively.
  • a pair of support structures 40 which in the embodiment illustrated in the drawings are made as separate components from the legs 16, but which could alternatively be formed integrally with the legs themselves, are also provided in order to support vertically and retain longitudinally the hydraulic actuators 26.
  • Each support structure 40 comprises a lower support element 42 and a pair of front and rear vertical stop elements 44 and 46, respectively.
  • the lower support element 42 and the front vertical stop element 44 form a single L-shaped component which is fixed to the leg 16, preferably in a releasable manner, for example by means of screws 48, whereas the rear vertical stop element 46 is joined to the end of the lower support element 42 on the opposite side to the front vertical stop element 44.
  • each support structure 40 forms a substantially horizontal flat abutment surface 50, on which the respective hydraulic actuator 26 rests with its lower horizontal flat face 32.
  • the vertical stop elements 44 and 46 form in their turn respective vertical stop surfaces 52 and 54 against which the transverse vertical flat faces 34 and 36 of the respective hydraulic actuator 26 are retained longitudinally .
  • Each hydraulic actuator 26 rests therefore at its bottom on the abutment surface 50 of the support structure 40 and on its outer side against the abutment surface 24 of the respective leg 16 and is also retained longitudinally, though with a certain freedom of movement (as shown in particular in Figures 2 and 3 by the gap between the corresponding pairs of front 34, 52 and rear 36, 54 stop surfaces), by the stop surfaces 52 and 54 of the support structure 40.
  • a straight-guide coupling (not il- lustrated) between the actuator 26 and the lower support element 42 can be provided, which is formed for instance by a longitudinal groove made approximately in the centre of the lower flat face 32 of the actuator 26 and by a corresponding guide projection which is provided on the abutment surface 50 of the lower support element 42 and engages in the above- mentioned longitudinal groove.
  • the use of such a kind of coupling between the hydraulic actuator 26 and the support structure 40 makes it possible advantageously to guide the longitudinal forward movement of the actuator when the friction member 38 is pressed against the braking surface 20a of the rim 20 upon operation of the brake and tends therefore to be drawn forward by this latter.
  • a guide edge projecting upwards and extending along the transversely inner side of the abutment surface 50 can be provided instead of a straight-guide coupling.
  • the rear vertical stop element 46 is rotata- bly mounted about a longitudinal axis defined by a pin 56, in such a manner that it can be moved between a vertical position (illustrated with solid line in Figure 1), in which it performs its function of rear stop for the hydraulic actuator 26, and a horizontal or inclined position (illustrated with dotted line in Figure 1) , in which it allows the hydraulic actuator 26 to be withdrawn rearwards from the support structure 40.
  • This further feature makes it possible easily to remove the actuator 26 to perform servicing operations.
  • each abutment surface 24 is preferably formed directly by the legs 16.
  • each abutment surface 24 could be formed by a further portion of the respective support structure 40 or by a further support element separate therefrom and interposed between the respec- tive leg 16 and the respective hydraulic actuator 26.
  • the abutment surfaces 24 are preferably inclined relative to a longitudinal vertical plane so as to converge forward. This makes it possible to obtain an advantageous self- clamping effect of the friction members 38 on the rim 20, which allows to increase the braking action for the same pressing forced applied on the friction members 38.
  • the friction members 38 when the friction members 38 are brought into contact with the braking surface 20a of the rim 20 upon operation of the brake, they tend to be drawn forward by the rim itself, as already mentioned before. Due to the inclination of the abutment surfaces 24, the forward longitudinal movement of the friction members 38 results in a transverse movement of the friction members 38 towards the braking surfaces 20a of the rim 20, and therefore in an increase in the effective braking force applied.
  • the operating system comprises a control hydraulic actuator associated to a brake lever mounted on the handlebar and a pair of hydraulic connection lines which connect the control hydraulic actuator to the two braking hydraulic actuators 26.
  • the hydraulic connection lines runs for all their length within the handlebar and the fork.
  • connection lines can project from the head of the fork or from the upper ends of the legs towards the inner side of the fork. Even though this second solution is aesthetically worse than the first one, it does not affect too much the appearance of the fork, since the connection lines are not very visible or not visible at all from the outside, in particular in the side view. In this case, in order better to hide the hydraulic connection lines, these latter can be at least partially housed in corresponding groves formed on the inner side of the legs .
  • a fork provided with a hydraulic brake according to the invention ensures substantially the same mechanical strength as a fork of similar shape but without a hydraulic brake.
  • the hydraulic actuator is all arranged on the inner side of the fork, the hydraulic connection lines can run wholly within the fork, or at most with their brake-side end section projecting inwards from the head of the fork, and the aesthetical appearance of the fork is hence not affected.
  • the invention has been described and illustrated with reference to an embodiment relating to a front fork, it can clearly be applied to a rear fork as well.
  • the abutment surfaces against which the two braking hydraulic actuators have to be mounted will be provided on the inner sides of the seatstays of the frame.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Arrangements (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

La fourche (10) comprend une paire de branches (16) adaptées pour supporter en rotation une roue (18) et un dispositif à frein hydraulique comprenant une paire d'actionneurs de freinage hydraulique (26), chacune desquelles étant montée sur une branche respective (16) et étant pourvue d'un élément de friction (38). Chaque actionneur de freinage (26) est agencé de manière à compresser l'élément de friction respectif (38) contre une surface de freinage (20a) de la roue (18) afin d'exercer une force de freinage. L'invention est caractérisée en ce que chaque branche (16) présente, sur le côté faisant face à la roue (18), une surface de contact latérale (24), une surface support inférieure (50) et une surface de retenue avant (52), et en ce que chaque actionneur hydraulique (26) présente une face latérale extérieure (28) agencée à l'encontre de la surface de contact latérale (24), une face inférieure (32) reposant sur la surface support inférieure (50), une face avant (34) maintenue longitudinalement par la surface d'arrêt avant (52) et une face latérale intérieure (30) sur laquelle est monté l'élément de friction (38).
EP06809317A 2005-09-16 2006-09-15 Fourche de bicyclette a frein hydraulique integre Withdrawn EP1924490A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20050137 ITTO20050137U1 (it) 2005-09-16 2005-09-16 Forcella di bicicletta con freno idraulico integrato.
PCT/IB2006/053315 WO2007031967A2 (fr) 2005-09-16 2006-09-15 Fourche de bicyclette a frein hydraulique integre

Publications (1)

Publication Number Publication Date
EP1924490A2 true EP1924490A2 (fr) 2008-05-28

Family

ID=37865364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06809317A Withdrawn EP1924490A2 (fr) 2005-09-16 2006-09-15 Fourche de bicyclette a frein hydraulique integre

Country Status (4)

Country Link
EP (1) EP1924490A2 (fr)
JP (1) JP5102768B2 (fr)
IT (1) ITTO20050137U1 (fr)
WO (1) WO2007031967A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011103814U1 (de) * 2011-07-29 2012-11-15 Canyon Bicycles Gmbh Doppelbrücken-Fahrradgabel
US9457867B2 (en) 2013-03-14 2016-10-04 Specialized Bicycle Components, Inc. Bicycle brake assembly
US9764794B2 (en) 2015-02-27 2017-09-19 Shimano Inc. Bicycle brake device and bicycle rim brake device
US9701362B2 (en) * 2015-02-27 2017-07-11 Shimano Inc. Bicycle brake device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776333A (en) * 1971-09-09 1973-12-04 W Mathauser Bicycle brake arrangement
DE2655699A1 (de) * 1976-12-09 1978-06-15 Weinmann & Co Kg Zweiradfelgenbremse
CH618931A5 (en) * 1977-08-22 1980-08-29 Paul J Zuppiger Hydraulically controlled braking device for cycles and mopeds
DE3320532A1 (de) * 1983-06-07 1984-12-13 Weinmann Gmbh & Co Kg Fahrrad- Und Motorrad-Teilefabrik, 7700 Singen Halterung einer fahrrad-felgenbremse
DE3336123A1 (de) * 1983-10-05 1985-05-02 Gustav Magenwirth Gmbh & Co, 7432 Urach Hydraulische felgenbremse fuer fahrraeder
DE3804581C2 (de) * 1988-02-13 1994-05-05 Magenwirth Gmbh Co Gustav Hydraulische Felgenbremse für Fahrräder
US4921081A (en) * 1988-12-22 1990-05-01 Autra-Bike Co., Inc. Hydraulic brake apparatus for bicycles
WO1990013470A1 (fr) * 1989-05-03 1990-11-15 Ueli Eser Frein hydraulique sur jante pour bicyclette
DE4232598C2 (de) * 1992-09-29 1998-10-08 Magenwirth Gmbh Co Gustav Hydraulische Felgenbremse für Fahrräder
DE19526496C2 (de) * 1995-07-20 1998-06-04 Dietrich Gerhard Ellsaeser Bremsträger für ein Fahrrad
DE19737050C1 (de) * 1997-08-26 1999-03-11 Otto Schrade Hydraulische Bremsvorrichtung für Fahrzeuge mit Tretkurbelantrieb

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007031967A3 *

Also Published As

Publication number Publication date
WO2007031967A3 (fr) 2007-07-19
JP5102768B2 (ja) 2012-12-19
JP2009508733A (ja) 2009-03-05
WO2007031967A2 (fr) 2007-03-22
ITTO20050137U1 (it) 2007-03-17

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