WO1996025296A1 - Roue de bicyclette - Google Patents

Roue de bicyclette Download PDF

Info

Publication number
WO1996025296A1
WO1996025296A1 PCT/AU1996/000074 AU9600074W WO9625296A1 WO 1996025296 A1 WO1996025296 A1 WO 1996025296A1 AU 9600074 W AU9600074 W AU 9600074W WO 9625296 A1 WO9625296 A1 WO 9625296A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
halves
rim
plastic
mirror image
Prior art date
Application number
PCT/AU1996/000074
Other languages
English (en)
Inventor
Ernest Leslie Kilpatrick
Original Assignee
Ernest Leslie Kilpatrick
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 Ernest Leslie Kilpatrick filed Critical Ernest Leslie Kilpatrick
Priority to AU46155/96A priority Critical patent/AU701996B2/en
Publication of WO1996025296A1 publication Critical patent/WO1996025296A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B5/00—Wheels, spokes, disc bodies, rims, hubs, wholly or predominantly made of non-metallic material
    • B60B5/02—Wheels, spokes, disc bodies, rims, hubs, wholly or predominantly made of non-metallic material made of synthetic material

Definitions

  • the present invention relates to bicycle wheels and to a process for manufacturing bicycle wheels.
  • the invention relates to hollow form, moulded plastic wheels for bicycles.
  • a process for manufacturing a hollow-form, plastic bicycle wheel including the steps of:- (a) producing two substantially mirror image halves of the said wheel, and (b) welding the said halves together.
  • each of the two substantially mirror image halves of the bicycle wheel are produced by injection moulding of a plastic material, which may be fiber- reinforced plastic or glass filled thermoplastic resin.
  • the said halves are vibration welded together.
  • the said halves may be ultrasonically welded together.
  • a hollow-form, plastic bicycle wheel comprising two substantially mirror image halves welded together.
  • Fig. 1 is a side elevatlonal view of a hollow- form, plastic bicycle wheel according to a first embodiment of the invention
  • Fig. 2 is an elevatlonal view of the internal detail of a mirror image half of the wheel of Fig. 1
  • Fig. 3 is an end sectional view of the two mirror image halves of the wheel of Fig. 1 in the split condition.
  • Fig. 4 is an end elevatlonal view of the wheel of Fig. 1 showing the two split substantially mirror image halves welded together
  • Fig. 5 is a sectional view through a portion of the rim of the wheel of Figs. 1 to
  • Fig. 6 is an isolated and enlarged end view of a portion of the rim of the wheel of Figs. 1 to 4
  • Fig. 7 is a side elevatlonal view of a hollow form, plastic bicycle wheel according to a second embodiment of the invention, to which a tyre is fitted,
  • Fig. 8 is an elevatlonal view of the internal detail of a mirror image half of part of the wheel of Fig. 7
  • Fig. 9 is an end sectional view through AA of the wheel and tyre of Fig. 7,
  • Fig. 10 is an enlarged sectional view of the tyre and a portion of the rim engaging the tyre of the wheel shown in Fig. 9, Fig. 11 is a sectional view through BB of a spoke of the wheel of Fig. 7,
  • Fig. 12 is a side elevatlonal view of a hollow form, plastic bicycle wheel according to a third embodiment of the invention
  • Fig. 13 is a sectional view through CC of a mirror Image half of the rim of the wheel of Fig. 12.
  • the bicycle wheel 10 of Figs. 1 to 6 is of a hollow- form, moulded plastic type having a central hub portion 11, an annular rim 12 and five radially extending spokes 13 that are symmetrically located at equal angular spacings about the hub portion 11 so as to connect the central hub portion 11 to the rim 12.
  • the wheel 10 is, in this instance, made of glass-filled thermoplastic resin.
  • the annular rim 12 has a peripheral channel 14 (see Fig. 4) to receive a tyre (not shown).
  • the hub portion 11 has a bore 15 extending therethrough to receive an axle bearing or shaft arrangement (not shown) which will enable the wheel to rotate thereabout.
  • the outer ends of bore 15 are enlarged to receive lock nuts, spacers and other retaining members.
  • the hub portion 11, rim 12 and spokes 13 are aerodynamically shaped to provide minimal wind resistance and stable handling during use.
  • the wheel 10 is manufactured by firstly producing two substantially mirror-image halves 16 and 17 as shown side- on in Fig. 3.
  • the 2 comprises a web-like network of ribs 21 and bridges 22 formed of the same thermoplastic resin material as the other parts of the wheel 10.
  • the ribs 21 extend radially outwardly from the bore 15 to the rim 12 and each rib 21 is located centrally through Its corresponding spoke 13.
  • the bridges 22 are of various forms.
  • Transverse bridge 25 connect the ribs 21 to the outer walls 24 of the spokes 13.
  • Flared bridges 28 connect the ribs 21 to the rim 12 and arcuate bridges 29 connect the ribs 21 to each other.
  • Rim bridges 30 connect the inner wall 26 to the outer wall 27 of the rim 12.
  • Each of the ribs 21 and bridges 22 have outer surfaces that are in the same plane.
  • Each half 16, 17 is produced by an Injection moulding technique whereby a plastic material, such as glass-filled thermoplastic resin, is injected into a very accurately manufactured moulding die. Glass-filled thermoplastic resin imparts strength and rigidity to the finished wheel.
  • the substantially mirror-image halves 16 and 17 are then placed in a nest of a vibration welder, for instance, which is designed to weld thermoplastic parts together.
  • Vibration welding is an improved friction welding technique capable of producing strong pressure-tight joints in thermoplastic parts. With vibration welding, frictional heat is generated by pressing the surfaces of two plastics parts together and vibrating the parts through a small relative displacement in the plane of the joint. In the particular case of the present invention, the two halves 16 and 17 are clamped together as shown in Fig.
  • Frictional heat is then generated between the abutting corresponding outer surfaces or joint interfaces by vibrating one of the halves through a peak to peak reciprocating displacement of 0.8 to 3.5 mm at a frequency of 120 or 240 cycles per second.
  • the vibration is terminated and the halves are automatically aligned so that, with a brief maintenance of clamping pressure, the molten plastic at the joint interfaces can solidify to form a continuous link of bonded plastic between the two halves.
  • FIG. 5 and 6 show flash traps 30 and 31 at all visible joint Interfaces in the wheel rim 12. If desired, similar flash traps may be present elsewhere along the web-like network of joint interfacing ribs and bridges.
  • the flash traps 30 and 31 are designed to take up any overflow of molten plastic during hardening and bonding of the two mirror-image wheel halves and so preserve a substantially smooth external surface of the rim.
  • the bicycle wheel 40 of Figs. 7, 8 and 9 is also of a hollow-form, moulded plastic type having a central hub portion 41, an annular rim 42 and three radially extending spokes 43 that are symmetrically located at equal angular spacings about the hub portion 41 and connect the central hub portion 41 to the rim 42.
  • the wheel 40 is made of glass-filled thermoplastic resin.
  • the annular rim 42 has a peripheral channel 44 (see Fig. 9) that receives a tyre 45.
  • the hub portion 41 has a central bore through which is located an axle bearing arrangement 90 (see Fig. 9) which will enable the wheel 40 to rotate thereabout.
  • Each of the outer ends of the shaft 46 of the axle bearing arrangement 90 receive a lock nut 47, a spacer and, located therebetween, an end bracket portion 48 of a fork 49 for the wheel 41.
  • the wheel 40 is adapted for use as a front wheel of a bicycle.
  • a sprocket may be readily welded or otherwise affixed to the hub 41 of the wheel 40.
  • the hub portion 41, rim 42 and spokes 43 of wheel 40 are aerodynamically shaped to provide minimal wind resistance and stable handling during use.
  • a valve assembly 50 for inflating and deflating the tyre 45 which provides sealable air access through the rim 42 via passageway 51 (see Fig. 8).
  • the wheel 40 is manufactured by, firstly, producing two substantially mirror-image halves (only a portion of half 52 is shown in Fig. 8) and, secondly, placing both halves in face to face relationship in a nest of a vibration welder so as to weld the web-like network of ribs and bridges together in the manner as described with reference to the wheel 10.
  • the web-like network of ribs and bridges shown in respect of the wheel half portion of Fig. 8 is configured differently to that of the wheel half of Fig. 2, owing, in large part, to the presence of only three spokes, rather than five, and to the specific high performance and strength requirements associated with a three spoked wheel.
  • ribs and bridges may assist in the stabilization and performance of the vibration welding process.
  • the configuration of the web ⁇ like network of ribs and bridges may differ In each wheel produced by the process of the present invention depending on the wheel performance requirements for which structural features play a significant role.
  • Fig. 10 shows flash traps 54, 55 at the various externally presented locations where vibration welding of corresponding surfaces will occur between the two wheel halves.
  • a rubber band 56 Connected along the circumference of the rim 42 is a rubber band 56 for the protection of the inner tube (not shown) of the tyre 45.
  • Fig. 11 shows flash traps 57, 58 at the outwardly facing or visible joint interfaces of the two halves of the spoke 43.
  • the bicycle wheel 60 of Fig. 12 is of substantially the same construction as the wheel 40 and is manufactured according to the same process of the invention, but differs, when viewed side-on, in that its annular rim 61 is of a non-uniform thickness, tending to be narrower or tapering as the rim 61 approaches the spokes 62, 63 and 64.
  • Such a rim configuration significantly reduces the weight of the wheel 60 over the wheel 40 and may confer improved aerodynamic features.
  • An appropriate web-like network of ribs and bridges provides internal structural support of the rim 61.
  • an air valve assembly may be present through the rim 61 at any one of Its narrowest points
  • the rim half 65 shown sectlonally in Fig. 13 differs from that shown (joined) in Fig. 10 by the relocation of the span portion 66 closer to the position of the tyre. This relocation of the span portion 66 substantially reduces the weight of the overall rim, thereby further improving the performance of the wheel 60.
  • the welding technique Apart from achieving the desired strength of the resultant bond between the two halves, the welding technique also creates an Integral wheel that Is lightweight and has little or no excess aerodynamic impediment.
  • Welding the two halves together to form an integral wheel has the advantage that there are no significant weakness or weight concentration points in the wheel, such as may be present if studs or fasteners were used to join the halves together.
  • Another advantage is that the wheel can be dynamically balanced at the stage of injection moulding each half of the wheel, since the welding technique does not necessitate the fitting onto the wheel of any additional parts. A better and more permanently balanced wheel will therefore result from the process of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne une roue de bicyclette. Deux moitiés sensiblement symétriques par rapport à un plan (dont l'une est représentée par le dessin) sont soudées, donnant une roue de bicyclette creuse en matière plastique. A l'intérieur, chaque demi-roue a un réseau de nervures et de passerelles (21 à 30) dont la configuration est symétrique par rapport à un plan, pour rendre rigides le moyeu (11), la jante (12) et les rayons (13). Chaque moitié peut être fabriquée par moulage par injection d'une matière plastique armée de fibres ou d'une résine thermoplastique chargée de verre. Les deux moitiés peuvent ensuite être soudées ensemble par vibrations ou aux ultrasons, donnant la roue de bicyclette.
PCT/AU1996/000074 1995-02-13 1996-02-13 Roue de bicyclette WO1996025296A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46155/96A AU701996B2 (en) 1995-02-13 1996-02-13 Bicycle wheel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN1080 1995-02-13
AUPN1080A AUPN108095A0 (en) 1995-02-13 1995-02-13 Bicycle wheel

Publications (1)

Publication Number Publication Date
WO1996025296A1 true WO1996025296A1 (fr) 1996-08-22

Family

ID=3785439

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1996/000074 WO1996025296A1 (fr) 1995-02-13 1996-02-13 Roue de bicyclette

Country Status (2)

Country Link
AU (1) AUPN108095A0 (fr)
WO (1) WO1996025296A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645639A1 (de) * 1996-01-19 1998-05-07 Porsche Ag Rad für ein Kraftfahrzeug
US5918947A (en) * 1996-11-06 1999-07-06 Dr. Ing. H.C.F. Porsche Ag Wheel for a motor vehicle and method of making same
US6196638B1 (en) 1998-12-29 2001-03-06 Shimano Inc. Bicycle wheel
DE102006010445A1 (de) * 2006-03-03 2007-09-06 Denk Engineering Gmbh Felge
US8002362B2 (en) 2004-02-17 2011-08-23 Trek Bicycle Corporation Optimal thermal properties in light weight and high performance braking composite clincher or tubular tire bicycle wheel rim
WO2014004727A1 (fr) * 2012-06-27 2014-01-03 Mad Fiber, Llc Roue de bicyclette présentant une structure latérale monobloc
GB2525931A (en) * 2014-05-09 2015-11-11 Smart Aero Technology Ltd Disc wheel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880700C (de) * 1953-05-07 Press Chemie G M B H Rad aus Kunststoff
AU3006963A (en) * 1962-05-10 1964-11-05 Dunlop Rubber Co. Ltd Improve ments in or relating to wheels
GB1125948A (en) * 1964-11-13 1968-09-05 Geo H Hughes Ltd Improvements in wheels
DE1955568A1 (de) * 1969-11-05 1971-05-27 Ver Deutsche Metallwerke Ag Speichenlaufrad fuer Fahrraeder und leichte Kraftfahrzeuge
WO1994027834A1 (fr) * 1993-05-20 1994-12-08 Michael Bede Whiteford Roue en matiere plastique pour cycle et procede de fabrication
WO1995012497A1 (fr) * 1993-11-04 1995-05-11 Wear And Tear, Inc. Roulette de patin a efficacite amelioree

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880700C (de) * 1953-05-07 Press Chemie G M B H Rad aus Kunststoff
AU3006963A (en) * 1962-05-10 1964-11-05 Dunlop Rubber Co. Ltd Improve ments in or relating to wheels
GB1125948A (en) * 1964-11-13 1968-09-05 Geo H Hughes Ltd Improvements in wheels
DE1955568A1 (de) * 1969-11-05 1971-05-27 Ver Deutsche Metallwerke Ag Speichenlaufrad fuer Fahrraeder und leichte Kraftfahrzeuge
WO1994027834A1 (fr) * 1993-05-20 1994-12-08 Michael Bede Whiteford Roue en matiere plastique pour cycle et procede de fabrication
WO1995012497A1 (fr) * 1993-11-04 1995-05-11 Wear And Tear, Inc. Roulette de patin a efficacite amelioree

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645639C2 (de) * 1996-01-19 2003-06-12 Porsche Ag Rad für ein Kraftfahrzeug
DE19645639A1 (de) * 1996-01-19 1998-05-07 Porsche Ag Rad für ein Kraftfahrzeug
US5918947A (en) * 1996-11-06 1999-07-06 Dr. Ing. H.C.F. Porsche Ag Wheel for a motor vehicle and method of making same
EP0841197A3 (fr) * 1996-11-06 2000-05-17 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Roue pour véhicule automobile
US6196638B1 (en) 1998-12-29 2001-03-06 Shimano Inc. Bicycle wheel
EP1016552A3 (fr) * 1998-12-29 2003-05-21 Shimano Inc. Roue de bicyclette
US8002362B2 (en) 2004-02-17 2011-08-23 Trek Bicycle Corporation Optimal thermal properties in light weight and high performance braking composite clincher or tubular tire bicycle wheel rim
DE102006010445A1 (de) * 2006-03-03 2007-09-06 Denk Engineering Gmbh Felge
US7934778B2 (en) 2006-03-03 2011-05-03 Peter Denk Composite wheel rim
DE102006010445B4 (de) * 2006-03-03 2014-02-13 Denk Engineering Gmbh Felge
WO2014004727A1 (fr) * 2012-06-27 2014-01-03 Mad Fiber, Llc Roue de bicyclette présentant une structure latérale monobloc
US9108461B2 (en) 2012-06-27 2015-08-18 Cayucos Cowboys, Llc Bicycle wheel with unitary side construction
US9770940B2 (en) 2012-06-27 2017-09-26 Cayucos Cowboys, Llc Bicycle wheel with unitary side construction
GB2525931A (en) * 2014-05-09 2015-11-11 Smart Aero Technology Ltd Disc wheel
GB2525931B (en) * 2014-05-09 2016-11-23 Smart Aero Tech Ltd Disc wheel

Also Published As

Publication number Publication date
AUPN108095A0 (en) 1995-03-09

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