WO2025116830A1 - Ensemble fourche avant d'un véhicule à voie unique à suspension progressive - Google Patents

Ensemble fourche avant d'un véhicule à voie unique à suspension progressive Download PDF

Info

Publication number
WO2025116830A1
WO2025116830A1 PCT/SK2023/050028 SK2023050028W WO2025116830A1 WO 2025116830 A1 WO2025116830 A1 WO 2025116830A1 SK 2023050028 W SK2023050028 W SK 2023050028W WO 2025116830 A1 WO2025116830 A1 WO 2025116830A1
Authority
WO
WIPO (PCT)
Prior art keywords
pivot joint
pivotally connected
foot
fork assembly
strut
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
PCT/SK2023/050028
Other languages
English (en)
Inventor
Roman Juris
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/SK2023/050028 priority Critical patent/WO2025116830A1/fr
Publication of WO2025116830A1 publication Critical patent/WO2025116830A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/005—Brakes; Arrangements thereof constructional features of brake elements, e.g. fastening of brake blocks in their holders

Definitions

  • the invention relates to a front fork assembly of a telescopic type of single-track vehicle with progressive suspension of telescopic spring units.
  • the invention falls within the field of engineering and transport.
  • a telescopic fork is used for the suspension of the front forks, especially for single- track vehicles.
  • a classic telescopic fork was used especially in the past and is gradually being replaced by a more modern inverted fork commonly known as the USD (Up Side Down).
  • USD Up Side Down
  • the suspension is linear; to a very small extent, the progressiveness of the suspension is possible by mounting progressively wound springs.
  • the disadvantage of these forks is the small degree of progressivity, shortening the wheelbase during suspension and the fork's "diving" during braking.
  • EP3541695B1 discloses a front fork assembly comprising a foot associated to sheath or to stem that pivotally supports a wheel spindle of an associable front wheel.
  • the associable front wheel is provided with braking device comprises a support pivotally mounted with respect to the wheel spindle. Between support of the braking device and foot of suspension are interposed transfer means of the braking force, exerted by the braking device.
  • the transfer means comprise a cam hinged to foot in a first hinge point.
  • the cam is kinematically connected to the braking device and is mechanically connected to a portion of the suspension integral with the sheath or the stem that does not support foot. This document does not solve progressive suspension or forwarding of forward wheel.
  • the principle of the present invention is aimed at achieving progressive suspension for telescopic forks, at eliminating the "diving" of the fork during braking, and at achieving the greatest possible maintenance of the constant wheelbase during suspension for motorcycles and bicycles.
  • the objective of the present invention has been achieved by the construction of the front fork assembly of a single-track vehicle with progressive suspension which comprises:
  • - telescopic spring unit having a longitudinal axis A, and containing the tube, a slider mounted in the tube in a sliding manner, and the foot of the front wheel
  • the foot is firmly connected to the slider and the tube is equipped with a bottom brace, where the combination of the tube and the bottom brace represents the top element or (USD fork assembly), or o the foot is firmly connected to the tube and the slider is equipped with a bottom brace and the combination of slider and bottom brace represents the top element (classic telescopic fork), and
  • rocker arm containing on the first arm the first joint for fixed connection to the front wheel axle, where the rocker arm further contains a central pivot joint formed in the balance portion of the rocker arm and the second pivot joint formed on the second arm of the rocker arm; where the rocker arm is pivotally connected to the foot via the central pivot joint;
  • a holder of a brake caliper containing a sixth pivot joint for the pivot connection with the axle of the front wheel and a seventh pivot joint located in front of the longitudinal axis of a telescopic spring unit, in the direction of driving;
  • the swivel segment comprises third, fourth and fifth pivot joints arranged at the vertices of the triangle, where the swivel segment is pivotally connected to the foot via the third pivot joint;
  • the second strut pivotally connected at one end to the swivel segment via the fifth pivot joint and at the other end pivotally connected to the top element either via the bottom brace, the tube or the slider.
  • the central pivot joint, the second pivot joint, the third pivot joint, the fourth pivot joint, and the fifth pivot joint, the sixth pivot joint and the seventh pivot joint are pivot pins, or optionally provided with a needle bearing or a sliding sheath.
  • first strut and/or the second strut and/or the third strut are length-adjustable, preferably by means of a threaded joint.
  • the threaded joint consists of a nut equipped with a clockwise thread on one side and an anticlockwise thread on the other side, thus enabling precise adjustment of the length of the second strut.
  • the foot comprises the first bracket and the swivel segment is pivotally connected to the first bracket via the third pivot joint.
  • the first bracket may be integrated with the foot or may be attached to the foot in the form of a slide-adjustable socket.
  • the top element may comprise the second bracket and the other end of the second strut may be pivotally connected to the second bracket.
  • the second bracket can be integrated with the top element or can be attached to the top element in the form of a slide- adjustable socket.
  • the brake caliper can be located on the holder of the brake caliper in any position around the circumference of the front wheel brake disc, preferably behind the longitudinal axis of the telescopic spring unit, in the direction of driving (in the static state of the motorcycle).
  • the second end of the third strut is pivotally connected to the first bracket (via the third pivot joint).
  • the other end of the third strut may be pivotally connected to the foot via a separate third bracket.
  • first joint, the central pivot joint, and the second pivot joint of the rocker arm may be arranged in a straight line in the mentioned order or may preferably be arranged at the vertices of a triangle.
  • the rocker arm, the swivel segment and the holder of the brake caliper can preferably be arranged in parallel planes.
  • Fig. 1 shows a diagram of the front fork assembly according to the invention with the front wheel before passing over an obstacle.
  • Fig. 2 shows a diagram of the front fork assembly according to the invention with the front wheel passing over an obstacle.
  • Fig. 3 shows a diagram of the front fork assembly according to the invention with the second strut equipped with the threaded joint, where the second strut is connected to the bottom brace.
  • the front fork assembly of a motorcycle with a front wheel 5, shown in Fig. 1, comprises a telescopic spring unit 1, which comprises a tube 2 equipped with the bottom brace 6.
  • the slider 3 is mounted in the tube 2 in a sliding manner and the foot 4 of the front wheel 5 is firmly connected to the slider 3.
  • the front fork assembly further comprises a rocker arm 7, which is firmly connected via the first joint 7.1 to the axle 8 of the front wheel 5.
  • the rocker arm 7 is pivotally connected to the foot 4 by means of the central pivot joint 7.2 in the form of a pin.
  • the first strut 10 is pivotally connected to the rocker arm 7 at the one end by means of the second pivot joint 7.3, in the form of a pin.
  • the other end of the first strut 10 is pivotally connected to the swivel segment 9 via the fourth pivot joint 9.2, in the form of a pin.
  • the swivel segment 9 is pivotally connected to the first bracket 14 via the third pivot joint 9.1, in the form of a pin, and the first bracket 14 is integrated with the foot 4.
  • the second strut 11 is attached at the one end to the swivel segment 9 via the fifth pivot joint 9.3, in the form of a pin.
  • the other end of the second strut 11 is pivotally attached to the second bracket 15 by means of a pin.
  • the second bracket 15 is attached to the tube 2 in the form of a slide-adjustable socket 16.
  • the front wheel 5 further comprises a brake disc 17.
  • the holder 18 of the brake caliper is pivotally connected to the axis 8 of the front wheel 5 via the sixth pivot joint 18.1.
  • the holder 18 of the brake caliper is via the seventh pivot joint 18.2, located in front of the longitudinal axis A of the telescopic spring unit 1 (in relation to the direction of driving), pivotally connected to the first end of the third strut 19.
  • the second end of the third strut 19 is pivotally connected to the foot 4 through a separate third bracket 20.
  • the brake caliper 12 is firmly connected to the holder 18 of the brake caliper behind the longitudinal axis A of the telescopic spring unit, in relation to the direction of driving, in the area of the brake disc 17.
  • An alternative front fork assembly construction (not shown) includes an inverted telescopic spring unit where the tube is firmly connected to the front wheel foot.
  • the slider is equipped with the firmly attached bottom brace, and together they form the top element.
  • This construction is usually referred to as USD (up-side-down).
  • An alternative front fork assembly construction (not shown) includes a construction as illustrated in fig. 1 with the difference that the brake caliper 12 is firmly connected to the holder 18 of the brake caliper in front of the longitudinal axis A of the telescopic spring unit, in relation to the direction of driving, in the area of the brake disc 17.
  • An alternative front fork assembly construction (not shown) includes a construction as illustrated in fig. 1 with the difference that the second end of the third strut 19 is pivotally connected to the foot 4 via the first bracket 14, using the same pin as the swivel segment 9 (the third pivot joint 9.1).
  • An alternative front fork assembly construction (not shown) includes a construction as illustrated in fig. 1 with the difference that the brake caliper 12 is firmly connected to the holder 18 of the brake caliper in front of the longitudinal axis A of the telescopic spring unit, in relation to the direction of driving, in the area of the brake disc 17, and the second end of the third strut 19 is pivotally connected to the foot 4 through the first bracket 14 and the third pivot joint 9.1.
  • Fig. 3 shows the construction of the front fork assembly as shown in Fig. 1 and described in Example 1, with the difference that the other end of the second strut 11 is pivotally connected to the bottom brace 6 by means of the second bracket 15 and the slide-adjustable socket 16, and the bottom brace 6 is firmly connected to the tube 2, and together they form the top element.
  • the second strut 11 is length-adjustable by means of the threaded joint 13.
  • the second strut consists of two parts, which are connected by a nut equipped with a clockwise and an anticlockwise thread.
  • Fig. 2 shows the front fork assembly with the front wheel 5, of the construction as described in Example 1, when passing over an obstacle.
  • the front wheel 5 is shifted forward and upward when passing over an obstacle.
  • the force evoked by passing over the obstacle that is acting on the front wheel 5 is transmitted through the rocker arm 7 to the first strut 10, which transmits the force through the swivel segment 9 and further through the second strut 11 to the second bracket 15.
  • This force causes the rocker arm 7 to rotate around the central pivot joint 7.2 clockwise.
  • This movement is transmitted through the first strut 10 and causes the rotation of swivel segment 9 around the third rotary joint 9.1 clockwise.
  • this movement is transmitted via the second strut 11 to the second bracket 15 and the tube 2.
  • the tube 2 and the second bracket 14, firmly attached to the tube 2 represent a fixed point in terms of springing, the slider 3 is progressively pushed into the tube 2.
  • Fig. 3 shows the front fork assembly with the front wheel 2, of the construction as described in Example 1, during braking.
  • the invention can be used on all means of transport using telescopic fork assembly.
  • the progressive suspension system of the front USD telescopic fork can also be used with the front telescopic forks for all types of motorcycles, bicycles, and also trailing arms suspended by telescopic shock absorbers, e.g., trailers, military equipment or landing gear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Abstract

L'invention concerne l'ensemble de fourche avant d'un véhicule à voie unique à suspension progressive comprenant une unité de ressort télescopique (1) comprenant un tube (2), un coulisseau (3) inséré de manière coulissante dans le tube (2), et un pied (4) de la roue avant (5), dans lequel : le pied (4) est fermement relié au coulisseau (3) et le tube (2) est équipé d'une pièce de renfort inférieure (6), la combinaison du tube (2) et de la pièce de renfort inférieure (6) représentant l'élément supérieur, ou le pied (4) étant fermement relié au tube (2) et le coulisseau (3) étant équipé de la pièce de renfort inférieure (6) et la combinaison du coulisseau (3) et de la pièce de renfort inférieure (6) représentant l'élément supérieur, l'ensemble fourche comprenant en outre un culbuteur (7) comprenant la première articulation (7.1) pour une liaison ferme avec un essieu (8) de la roue avant (5), l'articulation rotoïde centrale (7.2) et la deuxième articulation rotoïde (7.3) ; le culbuteur (7) étant relié de manière pivotante au pied (4) par l'intermédiaire de l'articulation rotoïde centrale (7.2) ; un support (18) de l'étrier de frein (12) contenant une sixième articulation rotoïde (18.1), pour la liaison pivotante avec l'essieu (8) de la roue avant (5), et une septième articulation rotoïde (18.2) située devant l'axe longitudinal d'une unité de ressort télescopique, par rapport au sens de la conduite ; une troisième jambe de force (19) avec sa première extrémité reliée de manière pivotante au support (18) de l'étrier de frein (12) par l'intermédiaire de la septième articulation rotoïde (18.2) et sa deuxième extrémité reliée de manière pivotante au pied (4), et l'étrier de frein (12) d'un frein à disque fixé sur le support (18) de l'étrier de frein (12) ; l'ensemble fourche comprenant en outre le segment pivotant (9) comprenant les troisième, quatrième et cinquième articulations rotoïdes (9.1, 9,2, 9,3) disposées aux sommets d'un triangle, le segment pivotant (9) étant relié de manière pivotante au pied (4) par l'intermédiaire de la troisième articulation rotoïde (9.1) ; la première jambe de force (10) étant reliée de façon pivotante au niveau d'une extrémité au culbuteur (7) par l'intermédiaire de la deuxième articulation rotoïde (7.3) et à l'autre extrémité reliée de manière pivotante au segment pivotant (9) par l'intermédiaire de la quatrième articulation rotoïde (9.2) ; la deuxième jambe de force (11) étant reliée de manière pivotante au niveau d'une extrémité au segment pivotant (9) par l'intermédiaire de la cinquième articulation rotoïde (9.3) et à l'autre extrémité reliée de façon pivotante à l'élément supérieur par l'intermédiaire de la pièce de renfort inférieure (6) ou par l'intermédiaire du tube (2) ou par l'intermédiaire du coulisseau (3).
PCT/SK2023/050028 2023-11-30 2023-11-30 Ensemble fourche avant d'un véhicule à voie unique à suspension progressive Pending WO2025116830A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SK2023/050028 WO2025116830A1 (fr) 2023-11-30 2023-11-30 Ensemble fourche avant d'un véhicule à voie unique à suspension progressive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SK2023/050028 WO2025116830A1 (fr) 2023-11-30 2023-11-30 Ensemble fourche avant d'un véhicule à voie unique à suspension progressive

Publications (1)

Publication Number Publication Date
WO2025116830A1 true WO2025116830A1 (fr) 2025-06-05

Family

ID=89620532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SK2023/050028 Pending WO2025116830A1 (fr) 2023-11-30 2023-11-30 Ensemble fourche avant d'un véhicule à voie unique à suspension progressive

Country Status (1)

Country Link
WO (1) WO2025116830A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5546093U (fr) * 1978-09-21 1980-03-26
JPS59192686A (ja) * 1983-04-18 1984-11-01 ヤマハ発動機株式会社 自動二輪車の前輪懸架装置
JPS6022486U (ja) * 1983-07-23 1985-02-15 本田技研工業株式会社 自動二輪車の前輪懸架装置
WO1987001670A1 (fr) * 1985-09-17 1987-03-26 Terence Anthony Haynes Ameliorations apportees a la suspension avant d'une motocyclette
US5931487A (en) * 1994-03-04 1999-08-03 Koppelberg; Guenter Brake dive compensator
CA2246683A1 (fr) * 1998-09-22 2000-03-22 Ian George Gwinnett Harper Systeme mecanique de freinage anti-plongee
WO2020136498A1 (fr) * 2018-12-24 2020-07-02 Piaggio & C. Spa Suspension avant de motocyclette

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5546093U (fr) * 1978-09-21 1980-03-26
JPS59192686A (ja) * 1983-04-18 1984-11-01 ヤマハ発動機株式会社 自動二輪車の前輪懸架装置
JPS6022486U (ja) * 1983-07-23 1985-02-15 本田技研工業株式会社 自動二輪車の前輪懸架装置
WO1987001670A1 (fr) * 1985-09-17 1987-03-26 Terence Anthony Haynes Ameliorations apportees a la suspension avant d'une motocyclette
US5931487A (en) * 1994-03-04 1999-08-03 Koppelberg; Guenter Brake dive compensator
CA2246683A1 (fr) * 1998-09-22 2000-03-22 Ian George Gwinnett Harper Systeme mecanique de freinage anti-plongee
WO2020136498A1 (fr) * 2018-12-24 2020-07-02 Piaggio & C. Spa Suspension avant de motocyclette

Similar Documents

Publication Publication Date Title
US4834412A (en) Motorcycle front wheel suspension device
US4526249A (en) Front suspension system for a motorcycle
US6036211A (en) Bicycle front suspension
US6488300B2 (en) Link type front suspension structure
US5462302A (en) Double swingarm front suspension for bicycles and motorcycles
JP4138975B2 (ja) 二輪車の前輪懸架装置
US6517095B1 (en) Suspended front fork for mountain bike and motorcycle
US7784809B2 (en) Motorcycle having a front wheel suspension
US7686115B2 (en) Front suspension and steering system for a motorcycle
JP4112715B2 (ja) 自動二輪車のフロントフェンダ取付構造
JP4149589B2 (ja) 自動二輪車の前部構造
CN109476355B (zh) 带反应式约束悬架的具有三个或更多个倾斜的车轮的车辆
EP0236303A1 (fr) Ameliorations apportees a la suspension avant d'une motocyclette
JPH06519B2 (ja) ２輪車用の懸架装置
CA3169543A1 (fr) Suspension sur tringlerie et mecanisme de direction comportant un moyen permettant de modifier les rapports de direction et de levier
FR2707926A1 (fr) Dispositif de suspension perfectionné pour une roue avant de véhicule automobile.
US20250187698A1 (en) Front Suspension System
US5209319A (en) Motorcycle front suspension
US6152267A (en) Caliper structure for link-type front suspension
EP0321803A2 (fr) Suspension de roue avant pour moto ou semblable
EP4289713A1 (fr) Suspension avant d'un véhicule à voie unique avec suspension progressive
WO2025116830A1 (fr) Ensemble fourche avant d'un véhicule à voie unique à suspension progressive
CN116583457A (zh) 用于鞍座式骑乘车辆的摆臂式前悬架
JP7586898B2 (ja) ロバーツ四節リンクを用いたサスペンションを有する車両
US20080143175A1 (en) Beam axle system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23841640

Country of ref document: EP

Kind code of ref document: A1