WO2006021049A1 - Truing wire spoked wheels - Google Patents

Truing wire spoked wheels Download PDF

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Publication number
WO2006021049A1
WO2006021049A1 PCT/AU2005/001290 AU2005001290W WO2006021049A1 WO 2006021049 A1 WO2006021049 A1 WO 2006021049A1 AU 2005001290 W AU2005001290 W AU 2005001290W WO 2006021049 A1 WO2006021049 A1 WO 2006021049A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
rim
wheel assembly
wire
spoked wheel
Prior art date
Application number
PCT/AU2005/001290
Other languages
French (fr)
Inventor
Kevin Linane Drage
Original Assignee
Castalloy Manufacturing Pty Ltd
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
Priority claimed from AU2004904853A external-priority patent/AU2004904853A0/en
Application filed by Castalloy Manufacturing Pty Ltd filed Critical Castalloy Manufacturing Pty Ltd
Priority to JP2007528511A priority Critical patent/JP2008510645A/en
Priority to DE112005002071T priority patent/DE112005002071T5/en
Publication of WO2006021049A1 publication Critical patent/WO2006021049A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/02—Rims characterised by transverse section
    • B60B21/04—Rims characterised by transverse section with substantially radial flanges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/34—Making machine elements wheels; discs wheels with spokes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/38—Making machine elements wheels; discs rims; tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/06—Rims characterised by means for attaching spokes, i.e. spoke seats
    • B60B21/062—Rims characterised by means for attaching spokes, i.e. spoke seats for bicycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/06—Rims characterised by means for attaching spokes, i.e. spoke seats
    • B60B21/064—Rims characterised by means for attaching spokes, i.e. spoke seats characterised by shape of spoke mounting holes, e.g. elliptical or triangular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/10—Rims characterised by the form of tyre-seat or flange, e.g. corrugated
    • B60B21/102—Rims characterised by the form of tyre-seat or flange, e.g. corrugated the shape of bead seats

Definitions

  • the present invention relates to a means and method for truing spoked (laced) wheels.
  • Wire spoked wheels generally have a rim upon which a pneumatic tyre is mounted, and a hub connected to the rim of the wheel via an array of spokes.
  • Truing a spoked wheel involves pulling the wheel into an accurate circular configuration. Once assembled, spoked rims are tedious to true, as the task is achieved by adjusting the spokes iteratively. That is, small tensioning adjustments are made to many or all of the spokes all around the wheel, and this is repeated for several or perhaps many revolutions of the wheel. If performed manually by a skilled person, this job is slow and tedious, while machines constructed for this purpose are expensive, cannot achieve the tolerances of a better quality wheel, and may under or over tension the spokes. There are significant problems associated with wheels having spokes of varying tensions, as in time the difference between the tightest and loosest spokes increases, causing the wheel to fall out of alignment and wobble; furthermore the tightest spokes are generally the first to break.
  • wheel rims tend to have imperfections, so it is not adequate simply to set all of the spoke lengths or tensions identically, Further, adjusting any one spoke effects the shape of the wheel, and the tensions of the other spokes. Even a slightly untrue wheel with relatively uniform tensions may have extremely non-uniform tensions if forced to be perfectly true.
  • wire spoked wheel assembly including a wheel rim having extra material added to at least one portion of a section thereof, the selective removal of which will locally true the wheel.
  • the rim is produced via casting.
  • the rim is cast from aluminium.
  • the wheel rim has a substantially constant cross section.
  • the portion of the wheel having the additional material added thereto is the tyre bead seating area.
  • the bead seating area is a pair of flanges inwardly projecting from the rim.
  • each of the pair of flanges are machined so as to provide a bead on a free end of the flanges.
  • the invention may be said to lie in a method of assembling and truing a spoked wheel including the steps of: drilling the required number of holes in the rim, ready to receive a corresponding number of spokes; locating, and clamping the hub and rim concentrically, and with the correct centerline, in a jig; lacing the spokes, and tensioning the spoke nipples to a predetermined, uniform tension; removing the wheel assembly from the jig; mounting the wheel assembly in a lathe so that the hub is accurately located on its true running axis; machining additional material from the rim so as to give a perfectly true running wheel that has zero lateral and radial run out on the tyre mounting surfaces.
  • the rim of the wheel may be produced via an extrusion process.
  • the rim is extruded from aluminium.
  • Figure 1 is cross-sectional view through a spoked wheel assembly.
  • Figure 2 is a detailed cross-sectional view through the rim prior to machining.
  • Figure 3 is a detailed cross-sectional view through the rim subsequent to machining.
  • a wheel 1 including a hub 3, a rim 4, and an array of spokes 5.
  • the rim 4 is substantially concave in cross-section, and has inwardly projecting annular flanges 10 and 15, that will form the tyre bead seating area post machining.
  • the assembled wheel 1 is mounted in the lathe via the hub 3 so that it rotates around its axis of rotation 2, and the inwardly projecting annular flanges 10 and 15 of the rim are machined in the vicinity of points 20 and 25, being the upper surfaces of the inwardly projecting annular flanges 10 and 15 in order to locally true the wheel, insomuch as the projecting annular flanges 10 and 15 respectively are true with respect to the axis of rotation of the wheel 1.
  • the integral projecting side flanges 36 and 38 which are formed during casting or extrusion of the rim 4 project over a portion of the sidewall of the tyre.
  • the projecting side flanges 36 and 38 are not machined during the machining of the Inwardly projecting annular flanges 10 and 15 as there is no requirement to do so given that the original forming process is reasonably accurate in terms of dimensional tolerances for such flanges.
  • the rim 4 has been machined with annular beads 30 and 35 so as to have a substantially bulbous shape respectively formed on them at their free ends, which will assist in seating the beads of the tyre onto the machined surfaces 40.
  • the bead of the tyre will then be substantially prevented from moving off the inwardly projecting annular flanges 10 and 15 due to the annular beads 30 and 35.
  • the rim 4 has a substantially constant cross-section > which lends itself to manufacture by casting in aluminium; but it is conceivable that it could also be produced by an extrusion process as would be immediately appreciated by those skilled in the art. It is considered that the means and method for truing spoked wheels according the present invention will yield huge advantages to those involved in the manufacture and assembly of wire spoked wheels, as the wheel can be trued much faster while keeping all of the spokes at uniform tension. Therefore, the overall process of wheel assembly is now substantially less that what is currently known which has proven to be a significant economic advantage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Turning (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Tires In General (AREA)

Abstract

A wire spoked wheel assembly, including a wheel rim (4) having extra material added to at least one portion of a section thereof, excess material is then removed from a section of the wheel in which the tyre bead (30, 35) is seated so as to locally true the wheel.

Description

TITLE
TRUING WIRE SPOKED WHEELS
FIELD OF THE INVENTION
The present invention relates to a means and method for truing spoked (laced) wheels.
DESCRIPTION OF THE PRIOR ART
Wire spoked wheels generally have a rim upon which a pneumatic tyre is mounted, and a hub connected to the rim of the wheel via an array of spokes.
Truing a spoked wheel involves pulling the wheel into an accurate circular configuration. Once assembled, spoked rims are tedious to true, as the task is achieved by adjusting the spokes iteratively. That is, small tensioning adjustments are made to many or all of the spokes all around the wheel, and this is repeated for several or perhaps many revolutions of the wheel. If performed manually by a skilled person, this job is slow and tedious, while machines constructed for this purpose are expensive, cannot achieve the tolerances of a better quality wheel, and may under or over tension the spokes. There are significant problems associated with wheels having spokes of varying tensions, as in time the difference between the tightest and loosest spokes increases, causing the wheel to fall out of alignment and wobble; furthermore the tightest spokes are generally the first to break.
There are a number of reasons for these difficulties. First, wheel rims tend to have imperfections, so it is not adequate simply to set all of the spoke lengths or tensions identically, Further, adjusting any one spoke effects the shape of the wheel, and the tensions of the other spokes. Even a slightly untrue wheel with relatively uniform tensions may have extremely non-uniform tensions if forced to be perfectly true.
OBJECT OF THE INVENTION
It is an object of the present invention to provide a means and method for truing spoked wheels that overcomes or at least substantially ameliorates the problems associated with the wire wheels, and methods for truing these, of the prior art.
Other objects and advantages of the present invention will become apparent from the following description, taken in connection with the accompanying drawings, wherein, by way of illustration and example, an embodiment of the present invention is disclosed.
SUMMARY OF THE INVENTION
In one form of this invention although this may not necessarily be the only or indeed the broadest form of this there is proposed wire spoked wheel assembly, including a wheel rim having extra material added to at least one portion of a section thereof, the selective removal of which will locally true the wheel.
In preference, the rim is produced via casting.
In preference, the additional extra, material is incorporated during casting..
In preference, the rim is cast from aluminium.
In preference, the wheel rim has a substantially constant cross section.
In preference, the portion of the wheel having the additional material added thereto is the tyre bead seating area.
In preference, the bead seating area is a pair of flanges inwardly projecting from the rim.
In preference, each of the pair of flanges are machined so as to provide a bead on a free end of the flanges.
In another form, the invention may be said to lie in a method of assembling and truing a spoked wheel including the steps of: drilling the required number of holes in the rim, ready to receive a corresponding number of spokes; locating, and clamping the hub and rim concentrically, and with the correct centerline, in a jig; lacing the spokes, and tensioning the spoke nipples to a predetermined, uniform tension; removing the wheel assembly from the jig; mounting the wheel assembly in a lathe so that the hub is accurately located on its true running axis; machining additional material from the rim so as to give a perfectly true running wheel that has zero lateral and radial run out on the tyre mounting surfaces.
In a further form of the invention, the rim of the wheel may be produced via an extrusion process.
In preference, the rim is extruded from aluminium.
BRIEF DESCRIPTION OF THE DRAWINGS
By way of example, an employment of the invention is described more fully the renown for with reference to the accompanying drawings, in which:
Figure 1 is cross-sectional view through a spoked wheel assembly.
Figure 2 is a detailed cross-sectional view through the rim prior to machining.
Figure 3 is a detailed cross-sectional view through the rim subsequent to machining.
DETAILED DESCRIPTION OF THE INVENTION
Now referring to the illustrations, and in particular to Figure 1 , there is a wheel 1 , including a hub 3, a rim 4, and an array of spokes 5. Referring now to Figure 2, where it can be seen that the rim 4 is substantially concave in cross-section, and has inwardly projecting annular flanges 10 and 15, that will form the tyre bead seating area post machining.
In accordance with the method for truing the wheel according to the present invention, the assembled wheel 1 , is mounted in the lathe via the hub 3 so that it rotates around its axis of rotation 2, and the inwardly projecting annular flanges 10 and 15 of the rim are machined in the vicinity of points 20 and 25, being the upper surfaces of the inwardly projecting annular flanges 10 and 15 in order to locally true the wheel, insomuch as the projecting annular flanges 10 and 15 respectively are true with respect to the axis of rotation of the wheel 1.
The integral projecting side flanges 36 and 38, which are formed during casting or extrusion of the rim 4 project over a portion of the sidewall of the tyre. The projecting side flanges 36 and 38 are not machined during the machining of the Inwardly projecting annular flanges 10 and 15 as there is no requirement to do so given that the original forming process is reasonably accurate in terms of dimensional tolerances for such flanges.
In this instance the rim 4 has been machined with annular beads 30 and 35 so as to have a substantially bulbous shape respectively formed on them at their free ends, which will assist in seating the beads of the tyre onto the machined surfaces 40. The bead of the tyre will then be substantially prevented from moving off the inwardly projecting annular flanges 10 and 15 due to the annular beads 30 and 35.
The rim 4, has a substantially constant cross-section> which lends itself to manufacture by casting in aluminium; but it is conceivable that it could also be produced by an extrusion process as would be immediately appreciated by those skilled in the art. It is considered that the means and method for truing spoked wheels according the present invention will yield huge advantages to those involved in the manufacture and assembly of wire spoked wheels, as the wheel can be trued much faster while keeping all of the spokes at uniform tension. Therefore, the overall process of wheel assembly is now substantially less that what is currently known which has proven to be a significant economic advantage.
Although the invention has been herein shown and described in what is conceived to be the most practical and preferred embodiment, it is recognised that departures can be made within the scope of the invention, which is not to be limited to the details described herein but is to be accorded the full scope of the appended claims so as to embrace any and all equivalent devices and apparatus.

Claims

1. A wheel assembly, including a wheel rim having extra material added to at least one portion of a section thereof, the selective removal of which will locally true the wheel.
2. The wheel assembly of claim 1 , wherein the wheel is a wire spoked wheel.
3. The wire spoked wheel assembly of claim 2, wherein the rirrrfs produced via casting.
4. The wire spoked wheel assembly of claim 3, wherein the additional extra, material is incorporated during casting.
5. The wire spoked wheel assembly of claim 4, wherein the rim is cast from aluminium.
6. The wire spoked wheel assembly of claim 5, wherein the wheel rim has a substantially constant cross section.
7. The wire spoked wheel assembly of claim 6, wherein the portion of the wheel having the additional material added thereto is the tyre bead seating area.
8. The wire spoked wheel assembly of claim 7, wherein the bead seating area is a pair of flanges inwardly projecting from the rim.
9. The wire spoked wheel assembly of claim 8, wherein each of the pair of flanges are machined so as to provide a bead on a free end of the flanges.
10. A method of assembling and truing a spoked wheel including the steps of: drilling the required number of holes in the rim, ready to receive a corresponding number of spokes; locating, and clamping the hub and rim concentrically, and with the correct centerline, in a jig; lacing the spokes, and tensioning the spoke nipples to a predetermined, uniform tension; removing the wheel assembly from the jig ; mounting the wheel assembly in a lathe so that the hub is accurately located on its true running axis; machining additional material from the rim so as to give a perfectly true running wheel that has zero lateral and radTaf run out on the tyre mounting surfaces.
11. The method of assembling and truing a spoked wheel as in claim 10, wherein the rim of the wheel may be produced via an extrusion process.
12. The method of assembling and truing a spoked wheel as in claim 11 , wherein the rim is extruded from aluminium.
13. A wire spoked wheel assembly substantially as herein before described, with reference to the accompanying drawings.
14. A method of assembling and truing a spoked wheel substantially as herein before described with reference to the accompanying drawings.
PCT/AU2005/001290 2004-08-26 2005-08-26 Truing wire spoked wheels WO2006021049A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007528511A JP2008510645A (en) 2004-08-26 2005-08-26 Wire spoke wheel reshaping
DE112005002071T DE112005002071T5 (en) 2004-08-26 2005-08-26 Aligning wire spoke wheels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2004904853A AU2004904853A0 (en) 2004-08-26 Truing wire spoked wheels
AU2004904853 2004-08-26

Publications (1)

Publication Number Publication Date
WO2006021049A1 true WO2006021049A1 (en) 2006-03-02

Family

ID=35967122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2005/001290 WO2006021049A1 (en) 2004-08-26 2005-08-26 Truing wire spoked wheels

Country Status (3)

Country Link
JP (1) JP2008510645A (en)
DE (1) DE112005002071T5 (en)
WO (1) WO2006021049A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US334647A (en) * 1886-01-19 Car-wheel-truing machine
US5103414A (en) * 1990-01-23 1992-04-07 Cornell Research Foundation, Inc. Method for trueing spoked wheels
WO2000016996A1 (en) * 1998-09-23 2000-03-30 Best Machine Development V.O.F. Method and apparatus for making a trued spoke wheel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US334647A (en) * 1886-01-19 Car-wheel-truing machine
US5103414A (en) * 1990-01-23 1992-04-07 Cornell Research Foundation, Inc. Method for trueing spoked wheels
WO2000016996A1 (en) * 1998-09-23 2000-03-30 Best Machine Development V.O.F. Method and apparatus for making a trued spoke wheel

Also Published As

Publication number Publication date
JP2008510645A (en) 2008-04-10
DE112005002071T5 (en) 2007-07-12

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