EP0914848A2 - Dispositif de commande de direction pour des véhicules à au moins à deux roues - Google Patents

Dispositif de commande de direction pour des véhicules à au moins à deux roues Download PDF

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Publication number
EP0914848A2
EP0914848A2 EP98119053A EP98119053A EP0914848A2 EP 0914848 A2 EP0914848 A2 EP 0914848A2 EP 98119053 A EP98119053 A EP 98119053A EP 98119053 A EP98119053 A EP 98119053A EP 0914848 A2 EP0914848 A2 EP 0914848A2
Authority
EP
European Patent Office
Prior art keywords
frame
steering device
fork
front wheel
supporting element
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Withdrawn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
EP98119053A
Other languages
German (de)
English (en)
Other versions
EP0914848A3 (fr
Inventor
Bruno Antignani
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.)
Proclimatic Di Bruno Antignani
Original Assignee
Proclimatic Di Bruno Antignani
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 Proclimatic Di Bruno Antignani filed Critical Proclimatic Di Bruno Antignani
Publication of EP0914848A2 publication Critical patent/EP0914848A2/fr
Publication of EP0914848A3 publication Critical patent/EP0914848A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/0033—Roller skates; Skate-boards with a castor wheel, i.e. a swiveling follow-up wheel
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/0046—Roller skates; Skate-boards with shock absorption or suspension system
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/01—Skateboards
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/01—Skateboards
    • A63C17/014—Wheel arrangements
    • A63C17/016—Wheel arrangements with wheels arranged in one track
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/04—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs
    • A63C17/045—Roller skis

Definitions

  • the present invention relates to a steering device for at least two-wheel vehicles.
  • the market offers no two-wheel vehicles, preferably but not necessarily sports vehicles, which can be driven by axially moving the vehicle frame and varying the weight distribution on the vehicle to achieve the same dynamic performance as skis.
  • a steering device for vehicles comprising at least two wheels resting on the ground; the vehicle comprising a frame, a front wheel, and at least one rear wheel; said steering device being interposed between said front wheel and said frame, and being characterized by comprising a fork supporting the front wheel and fitted, so as to rotate about a first axis, to a supporting element carried by the frame; and elastic reaction means for maintaining said fork in a rest position in which the front wheel is substantially aligned with the rear wheel; said first axis being inclined with respect to the ground, and lying in a first reference plane substantially perpendicular to the rotation axis of the rear wheel and substantially through the center of gravity of the rear wheel; the front wheel being fitted in rotary manner to said fork so that the rotation axis of the front wheel lies in a second reference plane perpendicular to said first axis.
  • Number 1 in Figure 1 indicates as a whole a steering device for fitment to a vehicle 2 comprising a frame 3 and at least two wheels resting on the ground and fitted in rotary manner to frame 3.
  • the term "ground” is intended to mean the surface of the terrain on which the wheels of vehicle 2 rest and run.
  • vehicle 2 comprises a front wheel 4 and at least one rear wheel 5; and steering device 1 provides for varying the position in space of front wheel 4 as a function of the axial rotation of, and the weight distribution on, frame 3.
  • rear wheel 5, on the other hand, is connected to frame 3 by a fork 6 integral with frame 3.
  • steering device 1 comprises a supporting plate 7 having one side hinged to frame 3 so as to oscillate about an axis A parallel to the rotation axis B of rear wheel 5; an elastic element 8 interposed between frame 3 and plate 7 to keep supporting plate 7, in the absence of external stress, in a given position with respect to frame 3; and a fork 9 fitted to supporting plate 7 so as to rotate about an axis C and via the interposition of a known thrust bearing.
  • Axis C is inclined with respect to the ground and lies in a plane P1 perpendicular to axis B and intersecting axis B at the center of gravity of rear wheel 5.
  • Fork 9 supports front wheel 4, and is so formed that the rotation axis D of front wheel 4 does not intersect axis C and lies in a plane P2 perpendicular to axis C. In the example shown, front wheel 4 is so located as to be tangent to axis C.
  • Steering device 1 also comprises an elastic reaction element 10, which, in the absence of external stress, maintains fork 9 in a rest position ( Figure 1) in which front wheel 4 is aligned with rear wheel 5. More specifically, in the rest position, front wheel 4 lies in plane P1 with axis D parallel to and at a minimum distance from axis B.
  • elastic element 10 is defined by an extension spring, which has a first end integral with fork 9 and a second end integral with frame 3 or supporting plate 7, is of minimum extension when fork 9 is in said rest position, and is preferably, but not necessarily, pretensioned.
  • steering device 1 is designed to keep front wheel 4 aligned with rear wheel 5 as long as vehicle 2 moves with frame 3 so positioned as to maintain plane P1 perpendicular to the ground ( Figure 1).
  • forces are generated in steering device 1, which rotate fork 9 to turn front wheel 4 and impose on vehicle 2 a curved trajectory with the concavity facing the axial rotation direction of frame 3 ( Figures 2, 3 and 4).
  • Elastic reaction element 10 obviously opposes said forces with gradually increasing intensity to bring steering device 1 into a state of equilibrium in which a given inclination of plane P1 corresponds to a given angle of rotation of fork 9 with respect to the rest position.
  • the above performance is further modified by varying the weight distribution on frame 3.
  • an increase in the weight on front wheel 4 increases the forces rotating fork 9 and so increases the steering angle of front wheel 4.
  • a reduction in the weight on front wheel 4 reduces the forces rotating fork 9 and so reduces the steering angle of front wheel 4.
  • the response of steering device 1 to axial rotation of frame 3 and to changes in weight distribution on frame 3 depends of course on the geometry of the device, and in particular on the inclination of axis C with respect to the ground and the distance between axes C and D.
  • the response of steering device 1 substantially depends on the characteristics of elastic reaction element 10 and of elastic element 8 when provided.
  • the stiffness coefficient of elastic element 10 directly affects the ratio between the inclination of plane P1 and the steering angle of front wheel 4, while the stiffness coefficient of elastic element 8 directly affects the geometry of steering device 1 as a function of the variation in weight distribution on frame 3.
  • each inclination of plane P1 corresponds to a maximum rotation angle of fork 9, which depends exclusively on the inclination of axis C with respect to the ground, and on the geometry of fork 9.
  • the stiffness coefficient of elastic element 10 only determines the value of the weight on front wheel 4 resulting in said maximum rotation angle, while any further increase in the weight on front wheel 4 has no effect whatsoever on the position of fork 9.
  • elastic element 8 provides for dynamically adjusting the inclination of axis C with respect to the ground as a function of the weight distribution on frame 3, so as to increase the maximum rotation angle of fork 9 for each angle of inclination of plane P1. More specifically, since the maximum rotation angle of fork 9 increases alongside an increase in the inclination of axis C with respect to the ground, elastic element 8 provides for gradually straightening axis C as the weight on front wheel 4 increases, and so gradually increasing the maximum rotation angle of fork 9. This provides for increasing the sensitivity of steering device 1 to variations in weight distribution on frame 3.
  • Elastic elements 8 and 10 may of course be so sized that elastic element 8 comes into effect when elastic element 10 is no longer effective.
  • elastic element 8 comprises a compression spring having a first end on frame 3 and a second end on supporting plate 7; and possibly a known shock absorber (not shown) having a first end connected to frame 3 and a second end connected to supporting plate 7.
  • elastic element 8 may comprise one or more precompressed springs (not necessarily similar) so as to only modify the geometry of steering device 1 when the weight on front wheel 4 exceeds a given value.
  • steering device 1 has no elastic element 8, and supporting plate 7 is integral with frame 3.
  • supporting plate 7 is integral with frame 3, but is made of elastically deformable material so as to oscillate with respect to frame 3 and, when deformed, permit variations in the inclination of axis C.
  • steering device 1 may dispense with elastic element 8.
  • elastic reaction element 10 comprises two extension springs having different stiffness coefficients, and which act on fork 9 when steering device 1 curves to the right and left respectively, so as to achieve a different performance of vehicle 2 as a function to the steering direction.
  • frame 3 of vehicle 2 is designed to enable a user to fit a vehicle 2 to each foot.

Landscapes

  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Power Steering Mechanism (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)
EP98119053A 1997-10-09 1998-10-08 Dispositif de commande de direction pour des véhicules à au moins à deux roues Withdrawn EP0914848A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97BO000606A IT1295219B1 (it) 1997-10-09 1997-10-09 Dispositivo di sterzo per veicoli provvisti di almeno due ruote.
ITBO970606 1997-10-09

Publications (2)

Publication Number Publication Date
EP0914848A2 true EP0914848A2 (fr) 1999-05-12
EP0914848A3 EP0914848A3 (fr) 2000-01-19

Family

ID=11342580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119053A Withdrawn EP0914848A3 (fr) 1997-10-09 1998-10-08 Dispositif de commande de direction pour des véhicules à au moins à deux roues

Country Status (2)

Country Link
EP (1) EP0914848A3 (fr)
IT (1) IT1295219B1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002022428A2 (fr) * 2000-09-16 2002-03-21 Michael Prinz Suspension amelioree de roues directrices pour des vehicules, notamment pour des trottinettes dirigeables par deplacement du poids
EP1097733A3 (fr) * 1999-11-04 2003-01-15 Christian Zwinger Planche à roulettes
EP1718517A2 (fr) * 2004-02-07 2006-11-08 Robert Bryant Vehicule a deux-roues en-ligne avec generateur de couple
FR2888204A1 (fr) * 2005-07-11 2007-01-12 Claude Blondeau Vehicule individuel a propulsion pedestre unilaterale
KR100678351B1 (ko) 2005-07-02 2007-02-05 허선구 스케이트보드
WO2007014858A2 (fr) * 2005-08-04 2007-02-08 SPORTISSIMO Sàrl Ski de fond a roues
WO2009156983A1 (fr) * 2008-06-24 2009-12-30 Roller Surfer Enterprises Ltd. Ensemble de roulette multidirectionnel et procédé d’utilisation de celui-ci

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR814376A (fr) * 1936-12-02 1937-06-21 Merlin Gerin Système mécanique de liaison et de transmission de mouvements applicable à divers engins de locomotion et de sport
GB741159A (en) * 1953-05-06 1955-11-30 Terraglide Ltd Improvements in or relating to roller skates
FR2201108B1 (fr) * 1972-09-25 1977-12-23 Copier Henri
DE2621473A1 (de) * 1975-06-27 1977-01-13 Duoroll Ag Zweiraedriger rollschuh
FR2625688B1 (fr) * 1988-01-12 1991-06-07 Barachet Jacques Planche a roulettes a deux roues en tandem
DE69105113T2 (de) * 1991-02-27 1995-05-24 Hwang Sun Ik Skate board für Strassenfahren.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1097733A3 (fr) * 1999-11-04 2003-01-15 Christian Zwinger Planche à roulettes
WO2002022428A2 (fr) * 2000-09-16 2002-03-21 Michael Prinz Suspension amelioree de roues directrices pour des vehicules, notamment pour des trottinettes dirigeables par deplacement du poids
WO2002022428A3 (fr) * 2000-09-16 2002-10-24 Michael Prinz Suspension amelioree de roues directrices pour des vehicules, notamment pour des trottinettes dirigeables par deplacement du poids
EP1718517A2 (fr) * 2004-02-07 2006-11-08 Robert Bryant Vehicule a deux-roues en-ligne avec generateur de couple
EP1718517A4 (fr) * 2004-02-07 2013-02-27 Robert Bryant Vehicule a deux-roues en-ligne avec generateur de couple
KR100678351B1 (ko) 2005-07-02 2007-02-05 허선구 스케이트보드
FR2888204A1 (fr) * 2005-07-11 2007-01-12 Claude Blondeau Vehicule individuel a propulsion pedestre unilaterale
WO2007014858A2 (fr) * 2005-08-04 2007-02-08 SPORTISSIMO Sàrl Ski de fond a roues
WO2007014858A3 (fr) * 2005-08-04 2007-10-25 Sportissimo Sarl Ski de fond a roues
WO2009156983A1 (fr) * 2008-06-24 2009-12-30 Roller Surfer Enterprises Ltd. Ensemble de roulette multidirectionnel et procédé d’utilisation de celui-ci

Also Published As

Publication number Publication date
IT1295219B1 (it) 1999-05-04
ITBO970606A1 (it) 1999-04-09
ITBO970606A0 (it) 1997-10-09
EP0914848A3 (fr) 2000-01-19

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