CA1046108A - Pneumatic tyre and wheel assemblies - Google Patents
Pneumatic tyre and wheel assembliesInfo
- Publication number
- CA1046108A CA1046108A CA252,398A CA252398A CA1046108A CA 1046108 A CA1046108 A CA 1046108A CA 252398 A CA252398 A CA 252398A CA 1046108 A CA1046108 A CA 1046108A
- Authority
- CA
- Canada
- Prior art keywords
- well
- filler
- wheel rim
- band
- pneumatic tyre
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/16—Sealing means between beads and rims, e.g. bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B21/00—Rims
- B60B21/12—Appurtenances, e.g. lining bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/02—Seating or securing beads on rims
- B60C15/0209—Supplementary means for securing the bead
- B60C15/0226—Supplementary means for securing the bead the bead being secured by protrusions of the rim extending from the bead seat, e.g. hump or serrations
Abstract
ABSTRACT OF THE DISCLOSURE
A pneumatic tyre and wheel rim assembly comprises a one-piece wheel rim having a well and a well filler, the well being in a position in which the well filler is required to serve as at least a part of the bead seat. The well filler includes a band of resilient polymeric material in the base of the well and an overlying segmental filler comprising a plurality of segments of rigid material linked together or held together by an encircling band. Contact between the segmental filler and the resilient band at the interface between them is rendered discontinuous by means of contouring of at least one of the contacting surfaces to allow for distortion to compensate for irregularities in the dimensions of the wheel rim.
A pneumatic tyre and wheel rim assembly comprises a one-piece wheel rim having a well and a well filler, the well being in a position in which the well filler is required to serve as at least a part of the bead seat. The well filler includes a band of resilient polymeric material in the base of the well and an overlying segmental filler comprising a plurality of segments of rigid material linked together or held together by an encircling band. Contact between the segmental filler and the resilient band at the interface between them is rendered discontinuous by means of contouring of at least one of the contacting surfaces to allow for distortion to compensate for irregularities in the dimensions of the wheel rim.
Description
1046108 - ~
This invention relates to pneumatic tyre and wheel ~
rim assemblies, and in particular to an improved means of ~ -filling a well in one-piece well-base rim in order to ensure that the tyre beads cannot be dislodged from the rim in a tyre deflation.
~ umerous means of blanking off the well of a well-base rim have been proposed, including bands which cover the mouth of the well, rubber rings which fill the well and rigid segmental fillers which can be assembled in the well and linked together or encircled by a suitable band.
When using a blanking means for this kind the filler or band has to be inserted in the well after the tyre has been placed on the rim, and removed from the well before the -tyre can be taken from the rim. These steps are easier the closer the location of the well to a rim flange. On the other hand bead seats for the beads of a tyre are required adjacent the flanges of the rim. In order to satisfactorily serve this purpose the filler must be capable of stably supporting the bead against the various forces exerted upon it.
According to the present invention there is provided a pneumatic tyre and wheel rim assembly comprising a one-piece wheel rim having a well and a well filler, the well being in a position in which the well filler is required to serve as at least a part of the-bead seat, the well filler including a band of resilient polymeric material in the base of the well and an overlying segmental filler comprising a plurality of segments of rigid material, the contact between the segmental filler and .
~. , ~ ' ' :, . :
. . , , . . - :
. . . - : . -, . .
- , ~046~08 the resilient band at the interface between them being rendered discontinuous by means of contouring of at least one of the contacting surfaces to allow for distortion to compensate for irregularities in the dimensions of the wheel rim.
A well-filler which i8 rigid should provide a secure base for the bead of the tyre but in practice its use in this manner leads to numerous difficulties owing to lack of concentricity in the base of the rim-well. The arrange-ment of the well filler in this invention permits the well-filler as a whole to compensate for irregularities in the rim by distortion of the resilient band as the segmental filler is tightened upon it. It also permits the external diameter of the well-filler to be accurate in dimensions and if desired, a taper could be introduced on the external surface of the filler in the manner of a normal bead seat.
Preferably the depth of the resilient band in the base of the well is no more than 3~/~ of the depth of the well.
The segmental filler preferably consists of segments of a plastics material or a metal or metal alloy. The dis-continuous interface between the segmental filler and the band may suitably be provided f~r by corrugations or castellations on the radially inner surface of the filler. The corrugations or castellations preferably run transversely of the segmental filler i.e. in a direction parallel to the rotational axis of the wheel.
The well must be wide enough to accommodate at least one bead of the tyre so that the well filler may provide the whole of one b~ad seat of the wheel rim assembly. If desired, 3.
, :
:
' ~
.
.. . .
i, ~046108 however, a ledge ma~ be provided immediately adjacent the wheel rim flange to act as part of the bead seat and provide a location for the heel of a tyre bead.
An air-seal may be provided between the band of resilient polymeric material and the segmental filler by incorporating on the band at least one radially outwardly extending portion at the side of the well filler to act as lip seals against the side of the segmental filler.
In an alternative arrangement the segmental filler may have a smooth cylindrical surface and the band of resilient polymeric material may have a plurality of ribs on its outer surface~ Preferably these ribs extend circum-ferentially of the band to form a seal with the inner surface of the segmental filler.
The wheel-rim and well-filler of the type described in this invention may be utilized in the wheel and tyre assembly described in our co-pending U.K. Patent Application ~o. 22,114/75 (DD.5579/5658), in this case a second well being required in the wheel rim which will subsequently be axially compressed when a tyre has been mounted on the rim.
A pneumatic tyre and wheel rim assembly in accordance with the invention will now be described in more detail, by way of example only with reference to the accompanying drawings, in which:-Figure 1 is a cross-sectional view of a pneumatic tyre and wheel rim assembly taken in a plane parallel to the axis of rotation, , r 4.
~" , ~ .
Figure 2 i9 a second cross-sectional view taken in the plane A-A of Figure 1, Figures 3, 4 and 5 illustrate, in cross-section, the well portions of three further embodiments of the invention, and Figures 6 and 7 illustrate methods of linking the segments of the segmental well filler.
The pneumatic tyre and wheel rim assembly shown in Figure 1 includes a one-piece wheel rim having a pair of annular flanges 10, 11 a bead seat 12 adjacent the flange 11, a substantially flat central portion 13, a well 14 and a ledge 15 on the opposite side of the well 14 immediately adjacent the flange 10. The well filler consists of a segmental filler 16 of rigid plastics material or light alloy and a band 17 of rubber in the base of the well.
One bead of the tyre is seated on the bead seat 12, but the other bead is seated partly on the ledge 15 and partly on the radially outer surface of the segmental filler 16.
As shown in Figure 2 the segmental filler consists of three arcuate segments 16 which, when assembled together substantially fill the portion of the well 14 left unoccupied by the band 17 of rubber.
The radially inner surface of the segments 16, whlch contacts the radially outer surface of the band 17 is of corrugated shape so that the contact is discontinuous. This leaves space for distortion of the rubber to take place and thus enables the assembly to accommodate local high and low spots on the base of the wheel rim well without localized high ~. . . .
~! ~
. . ~ - . . :: . . .
:. ' , ' :
1046~08 loadings on the rigid Yegments of the segmental filler.
In the assembly illustrated in Figure 3 a band of rubber 18 is provided which has a pair of tapered side pieces 19 extending up the sides of the well. The segmental well S filler 20 has correspondingly profiled sides and the side pieces 19 extend beyond the depth of the corrugations on the inner surface of the segment~ (shown by a dotted line in Figure 3) 90 that an air seal may be obtained by the wedging of the segments against the pieces 19. It will also be noted that in the embodiment shown in Figure 3 a well 21 is provided immediately adjacent a wheel rim flange 22, there being no ledge on the flange to support the heel of the bead.
Figure 4 illustrates a similar assembly to that shown in Figure 3 except that in this embodiment the segments 23 are not as wide as the well, and a rubber band 24 is provided which has a single side piece 25 extending up the whole of one side of the segments to act as an air seal against the underside of a tyre bead (not shown).
Figure 5 illustrates an embodiment similar to that shown in ~igure 1 except that the inner surface of its segments 26 is smooth and cylindrical, and a rubber band 27 is provided, which has circumferentially extending ribs on its outer surface. The latter are designed to be compressible and to form an air-seal against the inner surface of the segments.
Figures 6 and 7 illustrate schematically, in side-view, methods of linking together segments, Figure 7 showing a simple pivoting link and Figure 6 showing an interlock arrangement which may be used to push together the free ends of two segments which are pivotally linked at their other ends.
6.
. ~ . :
. ..
.
:
~ :-,~ .. .. .
This invention relates to pneumatic tyre and wheel ~
rim assemblies, and in particular to an improved means of ~ -filling a well in one-piece well-base rim in order to ensure that the tyre beads cannot be dislodged from the rim in a tyre deflation.
~ umerous means of blanking off the well of a well-base rim have been proposed, including bands which cover the mouth of the well, rubber rings which fill the well and rigid segmental fillers which can be assembled in the well and linked together or encircled by a suitable band.
When using a blanking means for this kind the filler or band has to be inserted in the well after the tyre has been placed on the rim, and removed from the well before the -tyre can be taken from the rim. These steps are easier the closer the location of the well to a rim flange. On the other hand bead seats for the beads of a tyre are required adjacent the flanges of the rim. In order to satisfactorily serve this purpose the filler must be capable of stably supporting the bead against the various forces exerted upon it.
According to the present invention there is provided a pneumatic tyre and wheel rim assembly comprising a one-piece wheel rim having a well and a well filler, the well being in a position in which the well filler is required to serve as at least a part of the-bead seat, the well filler including a band of resilient polymeric material in the base of the well and an overlying segmental filler comprising a plurality of segments of rigid material, the contact between the segmental filler and .
~. , ~ ' ' :, . :
. . , , . . - :
. . . - : . -, . .
- , ~046~08 the resilient band at the interface between them being rendered discontinuous by means of contouring of at least one of the contacting surfaces to allow for distortion to compensate for irregularities in the dimensions of the wheel rim.
A well-filler which i8 rigid should provide a secure base for the bead of the tyre but in practice its use in this manner leads to numerous difficulties owing to lack of concentricity in the base of the rim-well. The arrange-ment of the well filler in this invention permits the well-filler as a whole to compensate for irregularities in the rim by distortion of the resilient band as the segmental filler is tightened upon it. It also permits the external diameter of the well-filler to be accurate in dimensions and if desired, a taper could be introduced on the external surface of the filler in the manner of a normal bead seat.
Preferably the depth of the resilient band in the base of the well is no more than 3~/~ of the depth of the well.
The segmental filler preferably consists of segments of a plastics material or a metal or metal alloy. The dis-continuous interface between the segmental filler and the band may suitably be provided f~r by corrugations or castellations on the radially inner surface of the filler. The corrugations or castellations preferably run transversely of the segmental filler i.e. in a direction parallel to the rotational axis of the wheel.
The well must be wide enough to accommodate at least one bead of the tyre so that the well filler may provide the whole of one b~ad seat of the wheel rim assembly. If desired, 3.
, :
:
' ~
.
.. . .
i, ~046108 however, a ledge ma~ be provided immediately adjacent the wheel rim flange to act as part of the bead seat and provide a location for the heel of a tyre bead.
An air-seal may be provided between the band of resilient polymeric material and the segmental filler by incorporating on the band at least one radially outwardly extending portion at the side of the well filler to act as lip seals against the side of the segmental filler.
In an alternative arrangement the segmental filler may have a smooth cylindrical surface and the band of resilient polymeric material may have a plurality of ribs on its outer surface~ Preferably these ribs extend circum-ferentially of the band to form a seal with the inner surface of the segmental filler.
The wheel-rim and well-filler of the type described in this invention may be utilized in the wheel and tyre assembly described in our co-pending U.K. Patent Application ~o. 22,114/75 (DD.5579/5658), in this case a second well being required in the wheel rim which will subsequently be axially compressed when a tyre has been mounted on the rim.
A pneumatic tyre and wheel rim assembly in accordance with the invention will now be described in more detail, by way of example only with reference to the accompanying drawings, in which:-Figure 1 is a cross-sectional view of a pneumatic tyre and wheel rim assembly taken in a plane parallel to the axis of rotation, , r 4.
~" , ~ .
Figure 2 i9 a second cross-sectional view taken in the plane A-A of Figure 1, Figures 3, 4 and 5 illustrate, in cross-section, the well portions of three further embodiments of the invention, and Figures 6 and 7 illustrate methods of linking the segments of the segmental well filler.
The pneumatic tyre and wheel rim assembly shown in Figure 1 includes a one-piece wheel rim having a pair of annular flanges 10, 11 a bead seat 12 adjacent the flange 11, a substantially flat central portion 13, a well 14 and a ledge 15 on the opposite side of the well 14 immediately adjacent the flange 10. The well filler consists of a segmental filler 16 of rigid plastics material or light alloy and a band 17 of rubber in the base of the well.
One bead of the tyre is seated on the bead seat 12, but the other bead is seated partly on the ledge 15 and partly on the radially outer surface of the segmental filler 16.
As shown in Figure 2 the segmental filler consists of three arcuate segments 16 which, when assembled together substantially fill the portion of the well 14 left unoccupied by the band 17 of rubber.
The radially inner surface of the segments 16, whlch contacts the radially outer surface of the band 17 is of corrugated shape so that the contact is discontinuous. This leaves space for distortion of the rubber to take place and thus enables the assembly to accommodate local high and low spots on the base of the wheel rim well without localized high ~. . . .
~! ~
. . ~ - . . :: . . .
:. ' , ' :
1046~08 loadings on the rigid Yegments of the segmental filler.
In the assembly illustrated in Figure 3 a band of rubber 18 is provided which has a pair of tapered side pieces 19 extending up the sides of the well. The segmental well S filler 20 has correspondingly profiled sides and the side pieces 19 extend beyond the depth of the corrugations on the inner surface of the segment~ (shown by a dotted line in Figure 3) 90 that an air seal may be obtained by the wedging of the segments against the pieces 19. It will also be noted that in the embodiment shown in Figure 3 a well 21 is provided immediately adjacent a wheel rim flange 22, there being no ledge on the flange to support the heel of the bead.
Figure 4 illustrates a similar assembly to that shown in Figure 3 except that in this embodiment the segments 23 are not as wide as the well, and a rubber band 24 is provided which has a single side piece 25 extending up the whole of one side of the segments to act as an air seal against the underside of a tyre bead (not shown).
Figure 5 illustrates an embodiment similar to that shown in ~igure 1 except that the inner surface of its segments 26 is smooth and cylindrical, and a rubber band 27 is provided, which has circumferentially extending ribs on its outer surface. The latter are designed to be compressible and to form an air-seal against the inner surface of the segments.
Figures 6 and 7 illustrate schematically, in side-view, methods of linking together segments, Figure 7 showing a simple pivoting link and Figure 6 showing an interlock arrangement which may be used to push together the free ends of two segments which are pivotally linked at their other ends.
6.
. ~ . :
. ..
.
:
~ :-,~ .. .. .
Claims (8)
1. A pneumatic tyre and wheel rim assembly comprising a one-piece wheel rim having a well and a well filler, the well being in a position in which the well filler is required to serve as at least a part of the bead seat, the well filler including a band of resilient polymeric material in the base of the well and an overlying segmental filler comprising a plurality of segments of rigid material, the contact between the segmental filler and the resilient band at the interface between them being rendered discontinuous by means of contouring of at least one of the contacting surfaces to allow for distortion to compensate for irregularities in the dimensions of the wheel rim.
2. A pneumatic tyre and wheel rim assembly as claimed in claim 1 in which the depth of the resilient band in the base of the well is no more than 30% of the depth of the well.
3. A pneumatic tyre and wheel rim assembly as claimed in claim 1 or claim 2 in which the segments are formed of plastics material.
4. A pneumatic tyre and wheel rim assembly as claimed in claim 1 or claim 2 in which the segments are formed of a metal or a metal alloy.
5. A pneumatic tyre and wheel rim assembly as claimed in claim 1 or claim 2 in which the interface between the segmental filler and the band is provided by corrugations or castellations on the radially inner surface of the filler.
6. A pneumatic tyre and wheel rim assembly as claimed in claim 1 or claim 2 in which a ledge is provided immediately 7.
adjacent the wheel rim flange to act as a part of the bead seat.
adjacent the wheel rim flange to act as a part of the bead seat.
7. A pneumatic tyre and wheel rim assembly as claimed in claim 1 or claim 2 in which an air-seal is provided between the band of resilient polymeric material and the segmental filler by incorporating on the band at least one radially outwardly extending portion at the side of the well to act as a lip seal against the side of the segmental filler.
8. A pneumatic tyre and wheel rim assembly as claimed in claim 1 or claim 2 in which the band of resilient polymeric material has a plurality of ribs on its outer surface.
8.
8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22148/75A GB1548863A (en) | 1975-05-22 | 1975-05-22 | Pneumatic tyre and wheel rim assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1046108A true CA1046108A (en) | 1979-01-09 |
Family
ID=10174696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA252,398A Expired CA1046108A (en) | 1975-05-22 | 1976-05-12 | Pneumatic tyre and wheel assemblies |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS51143202A (en) |
| AU (1) | AU502942B2 (en) |
| BE (1) | BE841928A (en) |
| CA (1) | CA1046108A (en) |
| DE (1) | DE2622960A1 (en) |
| DK (1) | DK225476A (en) |
| FI (1) | FI761427A (en) |
| FR (1) | FR2311667A1 (en) |
| GB (1) | GB1548863A (en) |
| LU (1) | LU74970A1 (en) |
| NL (1) | NL7605249A (en) |
| SE (1) | SE7605640L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7900387L (en) * | 1978-01-21 | 1979-07-22 | Dunlop Ltd | DEVICE FOR WHEEL WHEELS FOR PNEUMATIC DECK |
| FR2555944B1 (en) * | 1983-12-01 | 1986-07-18 | Michelin & Cie | DEVICE FOR LOCKING THE SLEEVES OF A TIRE CASING |
| FR2687349B1 (en) * | 1992-02-18 | 1995-09-22 | Hutchinson | LOCKING INSERT DEVICE FOR TIRE CHAMBER. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR722953A (en) * | 1931-09-17 | 1932-03-31 | Hollow base rim device | |
| FR2257442B1 (en) * | 1973-07-30 | 1976-11-12 | Michelin & Cie |
-
1975
- 1975-05-22 GB GB22148/75A patent/GB1548863A/en not_active Expired
-
1976
- 1976-05-12 CA CA252,398A patent/CA1046108A/en not_active Expired
- 1976-05-14 AU AU14041/76A patent/AU502942B2/en not_active Expired
- 1976-05-17 BE BE167111A patent/BE841928A/en unknown
- 1976-05-17 NL NL7605249A patent/NL7605249A/en not_active Application Discontinuation
- 1976-05-18 SE SE7605640A patent/SE7605640L/en unknown
- 1976-05-18 LU LU74970A patent/LU74970A1/xx unknown
- 1976-05-19 FR FR7615042A patent/FR2311667A1/en active Granted
- 1976-05-20 JP JP51058503A patent/JPS51143202A/en active Pending
- 1976-05-20 FI FI761427A patent/FI761427A/fi not_active Application Discontinuation
- 1976-05-21 DK DK225476A patent/DK225476A/en unknown
- 1976-05-21 DE DE19762622960 patent/DE2622960A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU502942B2 (en) | 1979-08-16 |
| BE841928A (en) | 1976-09-16 |
| NL7605249A (en) | 1976-11-24 |
| FI761427A (en) | 1976-11-23 |
| GB1548863A (en) | 1979-07-18 |
| SE7605640L (en) | 1976-11-23 |
| JPS51143202A (en) | 1976-12-09 |
| LU74970A1 (en) | 1977-01-18 |
| AU1404176A (en) | 1977-11-24 |
| FR2311667A1 (en) | 1976-12-17 |
| DK225476A (en) | 1976-11-23 |
| FR2311667B1 (en) | 1978-11-17 |
| DE2622960A1 (en) | 1976-12-02 |
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