GB2039831A - Improvements in or Relating to Pneumatic Tyre and Wheel Rim Assemblies - Google Patents
Improvements in or Relating to Pneumatic Tyre and Wheel Rim Assemblies Download PDFInfo
- Publication number
- GB2039831A GB2039831A GB7942539A GB7942539A GB2039831A GB 2039831 A GB2039831 A GB 2039831A GB 7942539 A GB7942539 A GB 7942539A GB 7942539 A GB7942539 A GB 7942539A GB 2039831 A GB2039831 A GB 2039831A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tyre
- assembly according
- bead
- wheel rim
- groove
- 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.)
- Granted
Links
- 230000000712 assembly Effects 0.000 title description 2
- 238000000429 assembly Methods 0.000 title description 2
- 239000011324 bead Substances 0.000 claims abstract description 85
- 230000002787 reinforcement Effects 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- 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
-
- 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
-
- 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
- B60C15/0203—Seating or securing beads on rims using axially extending bead seating, i.e. the bead and the lower sidewall portion extend in the axial direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A pneumatic tyre (1) and wheel rim (2) assembly is disclosed in which the rim bead seats (12) are defined by grooves (14) having radially directed side portions (16, 17) which retain the associated tyre bead (5) against movement in an axial direction and each bead seat (12) includes means (21) in engagement with the tyre bead (5) to restrict rotation of the tyre bead relative to the bead seat. Preferably said means comprises a plurality of projections (21) formed integrally with part or all of the grooves (14) which engage the associated tyre bead (5) to restrict rotation. Each projection (21) may comprise a circumferentially extending rib or a tooth. Alternatively each groove and associated tyre head may be of complementary sub- circular cross-section, e.g. rectangular, and each groove may include projections (21). <IMAGE>
Description
SPECIFICATION
Improvements In or Relating to Pneumatic
Tyre and Wheel Rim Assemblies
This invention concerns improvements in or relating to a pneumatic tyre and wheel rim assembly and in particular to an assembly in which each of a pair of axially spaced tyre beads is located and retained in an associated bead seat constructed and arranged to prevent movement of the associated tyre bead in an axial direction.
Pneumatic tyres are retained on their wheel rims by the engagement of beads, one at the radially inward edge of each sidewall, on bead seats. The bead seats are tapered so that inflation pressure forces the bead onto the taper to effect the engagement. The bead regions of tyres are accordingly designed to provide for the taper engagement as well as anchorage of the carcass reinforcement. This requires a comparatively rigid zone in the tyre bead which extends into the lower sidewall and in heavy duty tyres such as are used for trucks this rigid zone may extend for up to 50% of the section height of the tyre. Flexing of the sidewall is therefore transmitted to a rigid bead zone which is stiff and inefficient in absorbing deflection. As a result premature failure of the tyre is often caused by failure in the bead zone.In addition the provision of a relatively long bead zone reduces the length of the sidewall and consequently the sidewall is not able to be very efficient in absorbing deflection. Furthermore the complexities of providing the necessary bead zone stiffness incurs cost.
One object of the present invention is to provide an improved means of retaining a tyre on a wheel rim which obviates some of the above problems.
According to the present invention we provide a pneumatic tyre and wheel rim assembly comprising a tyre having a tread portion, a pair of sidewalls and a pair of axially spaced tyre beads and a wheel rim having a pair of axially spaced bead seats in each of which a respective one of the tyre beads is located, each bead seat comprising a groove having a base portion and a pair of opposed side portions extending in a generally radial direction from the base portion whereby each tyre bead is retained against the movement in an axial direction and each bead seat having means in engagement with the associated tyre bead to restrict rotation of the tyre bead relative to the bead seat.
Preferably each groove is annular and of arcuate cross-section. Preferably each tyre bead is of complementary cross-section to the associated groove. Preferably the tyre beads have a bead core. Preferably the bead core is of annular cross-section and is seated in the associated groove. Preferably the core is substantially inextensible. The core may be of the steel cable type, other types of steel reinforcement or other substantially inextensible material.
Each groove and associated tyre bead may be of the type disclosed in our co-pending UK Patent
Application No 79321 59 (Serial No 2030085) dated 1 7 September 1 979 in which the side portions of the groove extend in a direction generally radially outwards from the base portion.
Alternatively each groove and associated tyre bead may be of the type disclosed in our copending U K Patent Application No 79321 61 (Serial No 2030087) dated 1 7 September 1979 in which the side portions of the groove extend in a direction generally radially inwards from the base portion.
The means for restricting rotation of each tyre bead relative to the associated bead seat may comprise a plurality of projections which are formed integrally with the bead seat and engage the associated tyre bead. The projections are preferably of uniform size. Each projection may comprise a single annular rib which extends circumferentially around the entire bead seat.
Alternatively each projection comprises a tooth.
The teeth may be uniformly distributed in circumferentially extending rows with adjacent rows of teeth being aligned or offset in a circumferential direction relative to one another.
Alternatively the teeth may be randomly distributed. The projections may be formed on part or all of the groove, for example the base portion and/or one or both of the side portions.
Preferably the tyre is a low aspect ratio tyre
having an aspect ratio of 70% or less, preferaby
60% or less and is preferably a radial tyre.
Preferably the tyre has one or more steel cord
plies and the crown of the tyre is reinforced by
one or more steel tread reinforcements.
Preferably the tyre tread is wider than the axial
distance between the axially outer side portions of
the grooves.
The wheel rim comprises a rim member profiled to define the bead seats. The rim member is retained in position by the usuai wheel disc.
The rim member may be formed by one or more components. Preferably the rim member is multi-component to facilitate assembly and in one preferred construction comprises three components with appropriate sealing means therebetween. Alternatively the sealing means may be omitted and an inner tube provided.
According to a further aspect of the present invention we provide a pneumatic tyre for the assembly according to the present invention.
According to yet a further aspect of the present invention we provide a wheel rim for the assembly according to the present invention.
The invention will now be described in more detail by way of example only, with reference to the accompanying diagrammatic drawing in which the single Figure is a cross-sectional view of a pneumatic tyre and wheel rim assembly according to the present invention.
The pneumatic tyre and wheel rim assembly shown in the accompanying drawing is substantially similar to that described in our copending U K Patent Application No 79321 59 and comprises a steel ply radial tyre 1 having an aspect ratio of 50% and a multi-component wheel rim 2.
The radial tyre 1 has a tread 3, a pair of sidewalls 4 and a pair of annular axially spaced
beads 5. Each bead 5 is similar and comprises a
bead core having a steel wire cable 6 of annular
cross-section and a triangular bead apex 7. The
bead core is substantially inextensible and as
shown does not extend into the lower portion of the adjacent tyre sidewall 4 to any appreciable
extent so that deflections can be absorbed by flexing of substantially the whole length of the
sidewall. A single steel cord ply 8 extends circumferentially around the tyre from one bead to the other bead. The ends of the ply 8 are wrapped around the associated bead core. Tread reinforcements indicated generally by the
reference numeral 9 are provided radially outwards of the ply 8 and reinforce the crown of the tyre.
The wheel rim 2 comprises a rim member 10 having a cylindrical centre portion 11 and axially spaced end portions defining bead seats 12. The rim member 10 is formed by three similar elements 13 (one only shown) which may be formed by rolling, casting or other suitable methods. Sealing means (not shown) is provided between the abutting ends of the elements 12.
Each bead seat 12 is similar and comprises an annular groove 14 having a base portion 15 and opposed side portions 1 6 and 17 respectively which extend radially outwards from the base portion 1 5. The side portion 1 6 leads to a radially inwardly directed extension 1 8 which leads to the centre portion 11. The side portion 1 7 leads to an axially outwardly directed support ledge 1 9 which is tapered radially outwards in a direction leading from the side portion 1 7 at a relatively small angle with respect to the rotational axis of the rim and terminates in a radius 20. The lower portion of the tyre sidewall 4 seats on the ledge 1 9 when the tyre is inflated.
Each groove 12 has a plurality of projections 21,forexample ribs which extend circumferentially around the entire groove and cover substantially all of the base and side portions 1 5, 1 6, 1 7 which contact the associated bead 5. The projections 21 are formed integrally with the grooves 14.
A wheel disc 22 comprising a cylindrical element 23 fits within the centre portion 11 of the assembled outer rim member 10 and is secured to each element 13 by bolts 24 which are rendered air-tight by means of O-rings (not shown). Alternatively a tube may be fitted.
Assembly of the tyre and rim is as follows, the beads 5 are located in the associated portion of the bead seats of each element 13. Withall three elements 13 in position the wheel disc 22 is fitted and secured to the elements 13 by engaging the bolts 24 in threaded nuts 24b welded to the elements 13. A valve (not shown) provided in the extension 18 of one of the elements 13 allows the tyre to be inflated.
As shown, the tread 2 is wider than the axial distance between the axially outer side portions of the grooves 14 and the diameter of each bead cable 6 is less than the maximum diameter of the side portions 1 6, 1 7 of the associated groove 14.
The bead cables 6 are substantially inextensible and consequently when the tyre is inflated the beads 5 are retained in the associated groove 14 with the projections 21 embedded in the adjacent surface of the beads 5. When the tyre is deflected the side portions 1 6, 1 7 of each groove 14 prevent movement of the associated beads 5 in an axially inwards or outwards direction while the engagement of the projections 21 with the beads 5 restrains any tendency for the beads to rotate in the bead seats.
Although the above-described wheel rim is a multi-component wheel rim it is possible to form the wheel rim of the invention as a single component, for example by casting. If the wheel rim is formed as a single component it is envisaged that the portions of each groove and the associated ledge may be formed to extend in an axially outwards direction to assist in location of the substantially inextensible reinforced beads and then pressed or crimped by a suitable tool to the appropriate shape.
Furthermore the wheel rim may have a well as in the above-described embodiment or the well may be omitted, it being understood that a well is not required for fitting the tyres according to the present invention. The support ledges 1 9 may be omitted.
The number, arrangement and dimensions of the projections 21 may be varied to give any desired resistance to rotational movement of the beads for a given inflation pressure. Thus the projections may be on the base portion and/or one or both side portions of each groove.
Furthermore each projection may comprise a tooth or prong. The teeth may be uniformly distributed in circumferentially extending rows with the teeth of adjacent rows being aligned or offset in a circumferential direction relative to one another. Alternatively the teeth may be randomly distributed.
In an alternative construction (not shown) each groove and the associated tyre bead are of complelentary non-circular cross-section, for example rectangular. In this case the shape selected for each groove and its associated tyre bead restricts any tendency for the tyre bead to rotate relative to the bead seat. In addition each bead seat may include projections as described above.
Claims (22)
1. A pneumatic tyre and wheel rim assembly comprising a tyre having a tread portion, a pair of sidewalls and a pair of axially spaced tyre beads and a wheel rim having a pair of axially spaced bead seats in each of which a respective one of the tyre beads is located, each bead seat comprising a groove having a base portion and a pair of opposed side portions extending in a generally radial direction from the base portion whereby each tyre bead is retained against movement in an axial direction and each bead seat having means in engagement with the associated tyre bead to restrict rotation of the tyre bead relative to the bead seat.
2. An assembly according to claim 1 wherein the means for restricting rotation of each tyre bead comprises a plurality of projections.
3. An assembly according to claim 2 wherein the projections are formed integrally with the associated bead seat.
4. An assembly according to claim 2 or claim 3 wherein each projection comprises a rib which extends circumferentially around the entire bead seat.
5. An assembly according to claim 2 or claim 3 wherein each projection comprises a tooth.
6. An assembly according to claim 5 wherein the teeth are arranged in circumferentially extending rows.
7. An assembly according to claim 6 wherein the teeth are uniformly distributed and adjacent rows of teeth are aligned or offset in circumferential direction relative to one another.
8. An assembly according to claim 5 wherein the teeth are randomly distributed.
9. An assembly according to any one of claims 2 to 8 wherein the projections are of uniform size.
10. An assembly according to any one of claims 2 to 9 wherein the projections are provided on the base portion and/or one or both side portions of the associated groove.
11. An assembly according to any one of the preceding claims wherein each tyre bead has a substantially inextensible bead reinforcement the diameter of which is less than the maximum diameter of the side portions of the associated groove.
12. An assembly according to claim 11 wherein the bead reinforcement does not extend into the lower portion of the adjacent tyre sidewall to any appreciable extent.
13. An assembly according to any one of the preceding claims wherein the axially outer side portion of each groove leads to an axially and radially outwardly directed support ledge.
14. An assembly according to any one of the preceding claims wherein the tyre is a radial tyre.
15. An assembly according to any one of the preceding claims wherein the tyre has an aspect ratio of 70% or less.
1 6. An assembly according to any one of the preceding claims wherein the width of the tyre tread exceeds the axial distance between the axially outer side portion of the grooves.
17. An assembly according to any one of the preceding claims wherein the lower portion of the tyre sidewalls curve axially inwardly to meet the associated bead at a relatively small angle with respect to a line parallel to the rotational axis of the tyre
1 8. An assembly according to any one of the preceding claims wherein the rim is multicomponent.
19. An assembly according to any one of the preceding claims further comprising a wheel disc for mounting the assembly on a vehicle.
20. A pneumatic tyre and wheel rim assembly substantially as herinbefore described with reference to the accompanying drawing.
21. The pneumatic tyre of the assembly according to any one of the preceding claims.
22. The wheel rim of the assembly according to any one of claims 1 to 20.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7942539A GB2039831B (en) | 1978-12-29 | 1979-12-10 | Pneumatic tyre and wheel rim assemblies |
| IT7928455A IT1209172B (en) | 1978-12-29 | 1979-12-28 | IMPROVEMENTS RELATED TO TIRE COVER COMPLEXES AND WHEEL RIM. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7850351 | 1978-12-29 | ||
| GB7942539A GB2039831B (en) | 1978-12-29 | 1979-12-10 | Pneumatic tyre and wheel rim assemblies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2039831A true GB2039831A (en) | 1980-08-20 |
| GB2039831B GB2039831B (en) | 1983-04-13 |
Family
ID=26270111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7942539A Expired GB2039831B (en) | 1978-12-29 | 1979-12-10 | Pneumatic tyre and wheel rim assemblies |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2039831B (en) |
| IT (1) | IT1209172B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279347A (en) * | 1989-12-21 | 1994-01-18 | Sumitomo Rubber Industries, Limited | Tire and wheel rim assemblies |
| WO1994019204A1 (en) * | 1993-02-21 | 1994-09-01 | Stahlschmidt & Maiworm Gmbh | Vehicle wheel |
| WO2015158472A1 (en) | 2014-04-16 | 2015-10-22 | Compagnie Generale Des Etablissements Michelin | Adapter for rolling assembly and rolling assembly comprising same |
| FR3020312A1 (en) * | 2014-04-29 | 2015-10-30 | Michelin & Cie | ROLLING ASSEMBLY |
| WO2017092929A1 (en) | 2015-12-01 | 2017-06-08 | Compagnie Generale Des Etablissements Michelin | Adapter for a wheeled assembly and a wheeled assembly comprising same |
-
1979
- 1979-12-10 GB GB7942539A patent/GB2039831B/en not_active Expired
- 1979-12-28 IT IT7928455A patent/IT1209172B/en active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279347A (en) * | 1989-12-21 | 1994-01-18 | Sumitomo Rubber Industries, Limited | Tire and wheel rim assemblies |
| WO1994019204A1 (en) * | 1993-02-21 | 1994-09-01 | Stahlschmidt & Maiworm Gmbh | Vehicle wheel |
| WO2015158472A1 (en) | 2014-04-16 | 2015-10-22 | Compagnie Generale Des Etablissements Michelin | Adapter for rolling assembly and rolling assembly comprising same |
| FR3020013A1 (en) * | 2014-04-16 | 2015-10-23 | Michelin & Cie | ADAPTER FOR ROLLING ASSEMBLY AND ROLLING ASSEMBLY COMPRISING SAME |
| CN106163824A (en) * | 2014-04-16 | 2016-11-23 | 米其林集团总公司 | Adapter and the rolling assembly including described adapter for rolling assembly |
| US9937749B2 (en) | 2014-04-16 | 2018-04-10 | Compagnie Generale Des Etablissements Michelin | Adapter for rolling assembly and rolling assembly comprising same |
| CN106163824B (en) * | 2014-04-16 | 2018-08-10 | 米其林集团总公司 | For rolling assembly adapter and include the rolling assembly of the adapter |
| FR3020312A1 (en) * | 2014-04-29 | 2015-10-30 | Michelin & Cie | ROLLING ASSEMBLY |
| WO2015165637A1 (en) * | 2014-04-29 | 2015-11-05 | Compagnie Generale Des Etablissements Michelin | Rolling assembly |
| WO2017092929A1 (en) | 2015-12-01 | 2017-06-08 | Compagnie Generale Des Etablissements Michelin | Adapter for a wheeled assembly and a wheeled assembly comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1209172B (en) | 1989-07-10 |
| GB2039831B (en) | 1983-04-13 |
| IT7928455A0 (en) | 1979-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5787950A (en) | Rim, supporting ring and assembly thereof | |
| US4351382A (en) | Tire and wheel rim assemblies | |
| US4148348A (en) | Tire and wheel rim assemblies | |
| US4325422A (en) | Pneumatic tire and wheel rim assemblies | |
| US4401144A (en) | Wheel rims for pneumatic tires | |
| US4274465A (en) | Pneumatic tire and wheel rim assembly | |
| EP0103346B1 (en) | Tyre bead reinforcement | |
| US20090039697A1 (en) | Locking Ring in an Assembly for Mounting a Tire on a Vehicle Hub | |
| RU2234424C2 (en) | Method of mounting pneumatic tire on wheel hub | |
| GB2030087A (en) | A pneumatic tyre and wheel rim assembly | |
| US3999587A (en) | Pneumatic tire and wheel rim assemblies | |
| US4274466A (en) | Tire and wheel rim assemblies | |
| US3999588A (en) | Wheel rims, pneumatic tires, and wheel rim and pneumatic tire assemblies | |
| US3865170A (en) | Wheels and pneumatic tire and wheel assemblies | |
| US7971614B2 (en) | System for locking a mounting ring on a vehicle hub | |
| US5318088A (en) | Rim with inclined seats and assembly of such a rim with a tire | |
| US3895668A (en) | Pneumatic wheel | |
| RU2380238C2 (en) | Device to support tire in blowing off and tire assembled with such device | |
| GB2039831A (en) | Improvements in or Relating to Pneumatic Tyre and Wheel Rim Assemblies | |
| US4046184A (en) | Safety means for preventing demounting of low or flat tires from vehicle wheels | |
| AU741644B2 (en) | Wheel and tyre assembly | |
| GB2030086A (en) | Improvements in or relating to a pneumatic tyre and wheel rim assembly | |
| US3918508A (en) | Wheel rim assemblies | |
| JPS6133722B2 (en) | ||
| US4081015A (en) | Wheel rims and pneumatic tire and wheel rim assemblies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931210 |