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WO1996003306A1 - Cadre de bicyclette - Google Patents

Cadre de bicyclette Download PDF

Info

Publication number
WO1996003306A1
WO1996003306A1 PCT/AU1995/000444 AU9500444W WO9603306A1 WO 1996003306 A1 WO1996003306 A1 WO 1996003306A1 AU 9500444 W AU9500444 W AU 9500444W WO 9603306 A1 WO9603306 A1 WO 9603306A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
rear wheel
mounting
insert
stays
Prior art date
Application number
PCT/AU1995/000444
Other languages
English (en)
Inventor
Lachlan Arthur Thompson
Original Assignee
Royal Melbourne Institute Of Technology
Austrialian Sports Commission
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 Royal Melbourne Institute Of Technology, Austrialian Sports Commission filed Critical Royal Melbourne Institute Of Technology
Priority to AU29722/95A priority Critical patent/AU2972295A/en
Publication of WO1996003306A1 publication Critical patent/WO1996003306A1/fr

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
    • B62K19/00—Cycle frames
    • B62K19/02—Cycle frames characterised by material or cross-section of frame members
    • B62K19/16—Cycle frames characterised by material or cross-section of frame members the material being wholly or mainly of plastics
    • 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
    • B62K19/00—Cycle frames
    • B62K19/30—Frame parts shaped to receive other cycle parts or accessories
    • 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
    • B62K3/00—Bicycles
    • B62K3/02—Frames

Definitions

  • the present invention relates to bicycle frames and more particularly to bicycle frames of shell-like construction.
  • a method of producin a bicycle frame of shell-like form comprising the steps of producing a frame of shell like form without mountings for at least some from the group consisting of the cran assembly, the handlebar /front fork assembly, seat, and the rear wheel, and the installing said mountings at selected, but variable, positions within the frame.
  • mounting inserts for mounting th handlebar/front fork assembly and the crank assembly are incorporated into th frame by drilling through the walls of the frame or otherwise forming a hole throug the frame and inserting one or more tubular inserts into the hole thus formed.
  • an insert for mounting the seat is fitted to an upwardly extendin part of the frame which can be reduced in length by cutting or the like in order t provide a required height from the seat to the crank axis.
  • the frame defines opposed rear wheel stays which can be reduce in length by cutting or the like to receive inserts for carrying the axle of the rea wheel.
  • the frame is formed from left and right half shells assemble together, with an insert between the half-shells in the rear part of the frame to for a closure which closes the interior of the shell from the rear, the insert preferabl having rear extensions which act to reinforce rearwardly-extending parts of the half- shells which act as the rear wheel stays.
  • a bicycl frame of shell-like form with structure which permits at least some of th handlebar /front fork assembly, the crank assembly, the seat, and the rear wheel t be mounted at variable positions within the frame.
  • the frame is formed from at least two half-shells bonded or otherwise secured together.
  • the half-shells may enclose an interior core, for example of a lightweight foamed material.
  • Figure 1 is a perspective view of a shell-type frame in accordance with one embodiment of the invention
  • Figure 2 is a side view of the frame shown in Figure 1;
  • Figure 3 is a plan view of the frame shown in Figure 1;
  • Figure 4 is a view showing two half-shells and an insert prior to assembly
  • Figure 5 is a schematic side view showing variable mounting zones for components of the bicycle; and Figure 6 is a side view of a bicycle incorporating the frame of Figures 1 to 5.
  • a shell-type frame 2 is produced without the mounting points for a head tube of the handlebar /front fork assembly, the crank assembly and rear wheel, the mounting points then being fitted in required locations to produce a bicycle of required size, the construction of the frame being such that the mounting points can be varied within predetermined areas.
  • the frame 2 is produced from separate left and right half-shells 4,6 of substantially identical shape, the edges 4a, 6a of which are joined over a substantial part of the periphery of the two half -shells except at the rear part of the frame where rearwardly-projecting extensions 8,10 of the two half-shells 4,6 are spaced to define stays between which the rear wheel is inserted.
  • the connection of the two half-shells 4,6 at their adjoining edges forwardly of the rearwardly projecting stays 8,10 results in a structure of box section of significant structural rigidity.
  • An insert 12 of bifurcated shape is incorporated between the opposing shell surfaces at the rear part of the frame and comprises an arcuate base part 14 and opposed rearwardly extending and divergent arms 16,18.
  • the arcuate base part 14 of the insert 12 When located between the half-shells 4,6 the arcuate base part 14 of the insert 12 extends between and connects the opposing inner surfaces of the two half-shells 4,6 and forms a rear closure for the two half-shells in the zone forwardly of the arcuate base part.
  • the divergent arms 16,18 of the insert 12 contact, and reinforce, the opposed rear extensions 8,10 of the half-shells 4,6.
  • the arcuate base part 14 also defines the rear wheel arch.
  • the closing of the shell-type frame at the rear wheel arch by the base part 14 of the insert 12 provides the frame with substantial torsional stiffness and the arms 16,18 of the insert 12 provide the rear extensions 8,10 of the half-shells 4,6 and which constitute the rear wheel stays, with compressive and bending stiffness.
  • the two half-shells 4,6 and the insert 12 which constitute the three components of the frame are formed separately and are then united in a final assembly stage.
  • the half-shells 4,6 and insert 12 can be produced from composite materials such as fibre reinforced resinous materials using appropriate moulding techniques and are then bonded together in the final assembly stage. More particularly, the half-shells 4,6 are of thin-walled structure of single or multi-layer construction comprising resin reinforced with carbon fibres, glass fibres, or aramid fibres, or a combination of two or more such fibres.
  • the two half-shells 4,6 and the insert 12 can be pressed from thin sheet metal and assembled together by welding and/or mechanical fasteners. It is to be noted that, to this point in its manufacture, the frame is not produced with mountings for the head tube, crank assembly, seat, or rear wheel.
  • the resulting frame as illustrated in the drawings thus comprises a main body part 20 with a forwardlyprojecting box section beam 22 which receives at its forward end a fitting for receiving the head tube of the handlebar/front fork assembly.
  • the lower part of the main body portion 20 forwardly of the rear wheel arch defined by base 14 of the insert 12 forms an area into which a mounting for the crank assembly is fitted.
  • An upwards extension 24 of the main body part 20 defines a tubular support for receiving a mounting for the seat.
  • the mountings for the head tube and crank assembly are formed by tubular inserts, the frame being drilled at the required locations to accept these inserts with the exact position of the inserts being varied at that time to suit the bicycle being manufactured.
  • the upwards extension 24 for receiving the seat mounting is formed to the maximum length which will be required, with appropriate adjustment being made by cutting the extension 24 to the required height and then incorporating a seat tube or other appropriate insert for mounting the seat within the extension of required length.
  • the various inserts are anchored within the frame by appropriate fastening techniques such as bonding or welding.
  • the rear wheel stays formed by the rear extensions 8,10 of the two half-shells 4,6 are to the maximum required length but can be reduced in length by cutting. With the rear wheel stays made to the required length, drop-out inserts for receiving the rear wheel axle can then be fitted into the rear end portion of the stays by forming appropriate cut-outs, inserting the inserts and securing, for example by bonding, welding, or by using mechanical fasteners.
  • Figure 5 shows the frame schematically and the cross-hatched areas 30, 32, 34, 36 indicate the areas within which the primary mounting inserts for the head tube, crank assembly, seat, and rear wheel are fitted. More particularly, and with reference to a main datum axis A-A coincident with the axis of the upwards extension 24 for the seat, the insert in the forward beam part 22 of the frame for receiving the head tube can be fitted anywhere within the area 30 which has a length of about 140 mm and which may be considered to be formed by distances of 70 mm forwardly or rearwardly of a median axis B-B which is itself approximately 470 mm forwardly of the datum axis A-A
  • the insert for the head tube does not need to be parallel to the axis B-B and can be inclined by up to plus or minus 6 °C from that axis to suit the required configuration.
  • the insert for the crank assembly can be fitted anywhere within the approximately oval area 32 which has a major axis of about 100 mm in length and a minor axis of about 80 mm with the centre being located substantially on the datum axis A-A and about 400 mm beneath the lowest point to which the seat extension 24 can be cut.
  • the seat extension itself extends to about 250 mm above the lowest point thereby providing the possibility for significant variation in seat height as indicated by the area 34.
  • the inserts forming the rear wheel drop-outs can be fitted within an area 36 extending to about 75 mm forwardly from the rear edge of the stays 8,10. It is to be noted that the structure of the frame is such that this variation can be accommodated without adversely affecting the structural strength of the frame.
  • a single shell-type frame can be used to produce a wide range of bicycle sizes without the need for a special mould or tooling for each size, thereby leading to significant reduction in the costs of manufacture for frames of this type.
  • a single basic frame would not be suitable for all different types of bicycle such as track racing, road racing mountain, nevertheless for each type of bicycle produced only one basic set of moulds or tooling is required to produce the range of adult sizes.
  • the mountings for the crank assembly, handlebar/front fork assembly, seat, and rear wheel are each incorporated into the frame at a selected position after production of the frame and this provides maximum possibility for variation in the dimensions and set-up of the completed bicycle within the overall parameters of a given frame.
  • one or more of the mountings could be incorporated into the frame at the time of manufacture of the frame, for example by incorporating an appropriate insert into a mold within which the frame is produced.
  • a tubular insert for the head tube can be incorporated in the frame in a fixed position at the time of molding or other manufacture of the frame; although the handle bar /front fork assembly will then be in a fixed position for all frames thus produced, significant adaption to meet customer requirements can still be achieved by varying the position of the other mountings within the frame after manufacture of the frame.
  • the invention is not restricted to shell-like frames formed from two half shells in the manner described.
  • the two half shells could enclose an inner core of a lightweight foamed material.
  • the outer shell could be formed in one piece around an inner core.
  • the outer shell could be constituted by an outer reinforced skin of an inner core, with the entire composite structure being produced in a single moulding operation.

Landscapes

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

Abstract

Un cadre de bicyclette en forme de coque a des zones comprenant des moyens de montage pour l'ensemble guidon/fourche de roue avant, l'ensemble pédalier, le siège et la roue arrière. Au moins certaines de ces zones ont une structure permettant aux moyens de montage correspondants d'être montés dans une position choisie mais variable, après la fabrication du cadre en forme de coque. Le cadre peut ainsi être adapté à des bicyclettes de différentes tailles sans qu'il soit nécessaire de changer les outils de base utilisés pour le produire.
PCT/AU1995/000444 1994-07-22 1995-07-21 Cadre de bicyclette WO1996003306A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29722/95A AU2972295A (en) 1994-07-22 1995-07-21 Bicycle frames

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM7012 1994-07-22
AUPM7012A AUPM701294A0 (en) 1994-07-22 1994-07-22 Bicycle frames

Publications (1)

Publication Number Publication Date
WO1996003306A1 true WO1996003306A1 (fr) 1996-02-08

Family

ID=3781535

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000444 WO1996003306A1 (fr) 1994-07-22 1995-07-21 Cadre de bicyclette

Country Status (2)

Country Link
AU (1) AUPM701294A0 (fr)
WO (1) WO1996003306A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005011850A1 (fr) * 2003-08-05 2005-02-10 Toyo Boseki Kabushiki Kaisha Sous-module membrane en fibres creuses et module comprenant un tel sous-module
DE102007006691A1 (de) 2007-02-10 2008-08-14 Volkswagen Ag Verfahren zur Herstellung von Konturen an einer die Außenkontur von Slushhäuten bestimmenden Galvanoform
WO2015095966A1 (fr) * 2013-12-23 2015-07-02 Industries Rad Inc. Cadre de bicyclette composite et son procédé de fabrication
US11142280B2 (en) 2016-03-24 2021-10-12 The Hive Global, Inc. Bicycle crank with spindle attachment structure
US11351815B2 (en) 2017-08-21 2022-06-07 The Hive Global, Inc. Bicycle cassette with clamping connection
US11485449B2 (en) 2015-09-01 2022-11-01 The Hive Global, Inc. Bicycle cassette with locking connection
US11932351B2 (en) 2020-07-17 2024-03-19 The Hive Global, Inc. Conical bicycle cassette sprocket structure
US12030586B2 (en) 2021-07-12 2024-07-09 The Hive Global, Inc. Seal for bicycle crank with differential chainring motion

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233916A (en) * 1964-02-13 1966-02-08 Benjamin G Bowden Velocipede frame
EP0198284A2 (fr) * 1985-04-16 1986-10-22 FIR S.p.A. FABBRICA ITALIANA RUOTE Cadre de bicyclette, en particulier du type pour compétition sportive
JPH0314781A (ja) * 1989-06-09 1991-01-23 Mitsubishi Rayon Co Ltd 自転車車体および後車輪の取付構造
GB2252537A (en) * 1991-02-07 1992-08-12 Pierre Abel Martin Cycle frame
US5273303A (en) * 1992-10-15 1993-12-28 Structural Polymer (Holdings) Ltd. W-shaped composite bicycle frame
WO1994026579A1 (fr) * 1993-05-14 1994-11-24 Lotus Cars Limited Cadre et elements de bicyclette
US5411280A (en) * 1989-04-07 1995-05-02 Softride, Inc. Bicycle brake and derailleur mount

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233916A (en) * 1964-02-13 1966-02-08 Benjamin G Bowden Velocipede frame
EP0198284A2 (fr) * 1985-04-16 1986-10-22 FIR S.p.A. FABBRICA ITALIANA RUOTE Cadre de bicyclette, en particulier du type pour compétition sportive
US5411280A (en) * 1989-04-07 1995-05-02 Softride, Inc. Bicycle brake and derailleur mount
JPH0314781A (ja) * 1989-06-09 1991-01-23 Mitsubishi Rayon Co Ltd 自転車車体および後車輪の取付構造
GB2252537A (en) * 1991-02-07 1992-08-12 Pierre Abel Martin Cycle frame
US5273303A (en) * 1992-10-15 1993-12-28 Structural Polymer (Holdings) Ltd. W-shaped composite bicycle frame
WO1994026579A1 (fr) * 1993-05-14 1994-11-24 Lotus Cars Limited Cadre et elements de bicyclette

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, M-1098, page 90; & JP,A,03 014 781 (MITSUBISHI RAYON CO LTD), 23 January 1991. *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005011850A1 (fr) * 2003-08-05 2005-02-10 Toyo Boseki Kabushiki Kaisha Sous-module membrane en fibres creuses et module comprenant un tel sous-module
DE102007006691A1 (de) 2007-02-10 2008-08-14 Volkswagen Ag Verfahren zur Herstellung von Konturen an einer die Außenkontur von Slushhäuten bestimmenden Galvanoform
WO2015095966A1 (fr) * 2013-12-23 2015-07-02 Industries Rad Inc. Cadre de bicyclette composite et son procédé de fabrication
EP3086997A4 (fr) * 2013-12-23 2017-10-25 Industries Rad Inc. Cadre de bicyclette composite et son procédé de fabrication
US10513302B2 (en) 2013-12-23 2019-12-24 Industries Rad Inc. Composite bicycle frame and method of manufacturing same
US11485449B2 (en) 2015-09-01 2022-11-01 The Hive Global, Inc. Bicycle cassette with locking connection
US11142280B2 (en) 2016-03-24 2021-10-12 The Hive Global, Inc. Bicycle crank with spindle attachment structure
US11351815B2 (en) 2017-08-21 2022-06-07 The Hive Global, Inc. Bicycle cassette with clamping connection
US11932351B2 (en) 2020-07-17 2024-03-19 The Hive Global, Inc. Conical bicycle cassette sprocket structure
US12030586B2 (en) 2021-07-12 2024-07-09 The Hive Global, Inc. Seal for bicycle crank with differential chainring motion

Also Published As

Publication number Publication date
AUPM701294A0 (en) 1994-08-18

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