GB2038248A - Tyre crown reinforcements - Google Patents
Tyre crown reinforcements Download PDFInfo
- Publication number
- GB2038248A GB2038248A GB7936440A GB7936440A GB2038248A GB 2038248 A GB2038248 A GB 2038248A GB 7936440 A GB7936440 A GB 7936440A GB 7936440 A GB7936440 A GB 7936440A GB 2038248 A GB2038248 A GB 2038248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tyre
- belt
- strips
- plies
- reinforcing plies
- 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
- 230000002787 reinforcement Effects 0.000 title description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229920002955 Art silk Polymers 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 239000004753 textile Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002654 heat shrinkable material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/1821—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers comprising discrete fibres or filaments
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0028—Reinforcements comprising mineral fibres, e.g. glass or carbon fibres
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
- B60C9/2009—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords comprising plies of different materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A radial tyre has a belt (5) whose edges are reinforced by members (9) each having filaments (13) which intersect one another at an angle of substantially 90 DEG and which each lie at an angle of from 30 to 60 DEG , preferably 45 DEG , to the circumferential direction of the tyre. Each member (9) may be a single ply structure comprising an integral network of filaments (13) as shown in Figure 3, or may be formed by two superposed and cross-laid cord plies. The belt (5) may as shown comprise two plies (6), (7) with cords at 18-25 DEG to the circumferential. <IMAGE>
Description
SPECIFICATION
Pneumatic vehicle tyre
The present invention relates to a pneumatic vehicle tyre having a belt which extends substantially over the width of the tread strip and is located between the carcase and the tread strip, the edges of the belt being enclosed by strips made of filament-like reinforcing plies.
It is known, in connection with belted tyres having a coarse-studded tread surface profile, to enclose the edges of the belt with additional reinforcing plies.
These strip-like reinforcing plies are comprised of filaments extending in the circumferential direction of the tyre and are made of a heat-shrinkable material, e.g. a polyamide, polyester or polyvinyl alcohol. These reinforcing plies have as object the prevention of unevenesses in the tyre surface and structural changes of the tyre, when the tyre surface, on account of its coarse-studded profile, is embossed or impressed.
These reinforcing plies, however, only have a limited resilient deformability in the circumferential direction of the tyre; moreover the necessary diameter increase at the edge of the belt during production of the tyre is prevented. Accordingly, in the completed, vulcanized tyre, the travelling and abrasion behaviour of the tyre is affected due to the greatly different deformation behaviour between the belt edge an the belt centre.
It is an object of the invention to at least minimize these deficiencies. Hence a tyre is to be provided which, during its production and preferably in the
region of its belt portion, still permits minor dia
meter increases. It is also desired to produce a belted tyre in which securing of the belt edges is effected, whilst, at the same time, a resilient deformability is obtainable in the crown portion of the tyre to an
increased extent, without having to be concerned
regarding the occurrence of separation phenomena
in the region of the belt edges.
In accordance with the present invention there is
provided a pneumatic vehicle tyre having a belt which is tension-resistant in the circumferential direction of the tyre, extends substantially over the
width of the tread strip, and is located between tread
strip and the carcase, which belt produces lateral
stabilisation of the tyre, the edges of the belt being
enclosed by strips made of filament-like reinforcing
plies, in which the reinforcing plies of the strips
intersect at an angle of substantially 90 , whilst they
also obtend an angle of from 30 to 60 with the
circumferential direction of the tyre.
Preferably, the reinforcing plies obtend an angle of 45" with the circumferential direction of the tyre.
These reinforcing plies may be formed by two
superposed cord fabric plies, preferably, however, a
lattice-like structure of filament-like reinforcing plies
is used, in which the reinforcing plies are securely
interconnected at the intersections, e.g. by mutual
penetration or welding.
This as such solid lattice-like reinforcing element
therefore permits a relatively high resilient deforma
tion to occur, because the filament-like reinforcing plies extend at the aforesaid relatively large angles to the circumferential direction of the tyre. Thus, a diamond displacement may occur as is known in diamond bracing in tyre construction. This deformability also permits the individual strips during the tyre fashioning or during the winding onto the tyre blank to be deformed in the required manner, to allow the strip then to be placed flush onto underlays of the tyre blank which deviate from a cylindrical shape to a considerable extent.
The present invention will be further illustrated, by way of example, with reference to the accompanying drawings, in which:
Figure lisa radial part section through a pneumatic vehicle tyre;
Figure 2 is a partial plan view of the reinforcement of the tyre body located between the tread strip and carcase of the tyre; and
Figure 3 is a partial elevation from the enlarged diagrammatic view shown in Figure 2.
The tyre body, comprised of rubber or rubber-like materials, is reinforced by a radial carcase 1, the edges of which are anchored by being looped around bead cores 2 in the tyre beads 3.
A belt 5 made of parallel rubberised and tensionresistant filaments, preferably steel wires, is provided between the tread strip 4 and the carcase 1 and extends substantially over the width of the tread strip 4. As illustrated, the belt 5, is formed of two superposed plies 6,7 arranged in such a manner that the steel wires 8 of both plies 6,7 intersect and in symmetrical arrangement each obtend an angle a of from 18 to 250 with the circumferential direction of the tyre.
The edges of the belt 5 are enclosed bandage-like strips 9 which in Figure 1 are shown by broken lines.
These strips 9 have a width of about 1/8th to 1/5th of the width of the belt 5; their laterally outward edge 10 is located on half the spacing A between the two edges 11, 12 of the two plies 6, 7.
The strips 9, which are single ply in accordance with the embodiment, comprise tension-resistant filaments 13, e.g. of artificial silk intersecting at an angle of substantially 90". These filaments 13, however, are not located in the manner of a solid fabric with crimp, thus in the region of the intersections mutually considerably displaceable, but are substantially non-displaceably interconnected at the
intersections 14, which interconnection may be
obtained by mutual penetration ofthefilaments 13, or by welding. The filaments 13 each obtend an angle of approximately 45" with the circumferential
direction of the tyre.
Consequently, the steel wires 8 extend at a substantially smaller angle relative to the circumferential direction of the tyre than the filaments 13.
Moreover, they are not laid in two plies one above the other, but substantially in a plane or a ply, so that
a sufficiently resilient elongation of the strips 9 may
occur once in circumferential direction and then also with local deformation, in that the angles between
intersecting filaments 13 change in a "lazy-tong"
manner. These strips thus have a favourable effect
on the edge regions of the belt 5. They quieten down the freely extending edges, prevent separation phe nomena whilst still permitting adequate deformations. Since the strips 9 are made predominantly of artificial silk or any similar soft material, they form, from both strength and dynamic aspects, favourable transition between the relatively rigid belt edges and the rubber plies of the tread surface edge portions located thereabove.
This deformability, however, is also useful in tyre manufacture. During production of tyres it permits diameter changes of the tyre in the crown portion e.g. when the still unvulcanized tyre blank is to be profiled under a certain diameter increase at the outer circumference and thus is to be moulded.
Claims (8)
1. A pneumatic vehicle tyre having a belt which is tension-resistant in the circumferential direction of the tyre, extends substantially over the width of the tread strip, and is located between tread strip and the carcase which belt produces lateral stabilisation of the tyre, the edges of the belt being enclosed by strips made of filament-like reinforcing plies, in which the reinforcing plies of the strips intersect at an angle of substantially 90 , whilst they also obtend an angle of from 30 to 60 with the circumferential direction of the tyre.
2. A pneumatictyre as claimed in claim 1, in which the reinforcing plies obtend an angle of 45" with the circumferential direction of the tyre.
3. A pneumatic tyre as claimed in claim 1 or 2, in which the reinforcing plies form single ply strips, and at their intersections are non-displaceably connected to each other.
4. A pneumatic tyre as claimed in claim 3, in which the reinforcing plies at their intersections are non-displaceably connected to each other by mutual penetration or welding.
5. A pneumatic tyre as claimed in any preceding claim, in which in a double ply belt stepped at its edges, the laterally outside edge of the strips terminates substantially at half the spacing between the two edges of the two plies.
6. A pneumatic tyre, as claimed in any preceding claim, in which the width of the strips corresponds from 1/5th to 1/8th of the belt width.
7. A pneumatictyre as claimed in any preceding claim, in which the reinforcing plies of the strips are made from textile material, such as artificial silk, whilst the belt plies are comprised of steel wires or
reinforcing members of a similarly high tension
resistance and bending resistance.
8. A pneumatic vehicle tyre, substantially as
hereinbefore described with reference to and as
illustrated in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782847926 DE2847926A1 (en) | 1978-11-04 | 1978-11-04 | VEHICLE TIRES |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2038248A true GB2038248A (en) | 1980-07-23 |
GB2038248B GB2038248B (en) | 1983-05-11 |
Family
ID=6053891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7936440A Expired GB2038248B (en) | 1978-11-04 | 1979-10-19 | Tyre crown reinforcements |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2847926A1 (en) |
FR (1) | FR2440838A1 (en) |
GB (1) | GB2038248B (en) |
IT (2) | IT1124633B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4635696A (en) * | 1982-10-18 | 1987-01-13 | The Goodyear Tire & Rubber Company | Radial tires and a belt structure therefor |
FR2887808A1 (en) * | 2005-06-30 | 2007-01-05 | Michelin Soc Tech | PNEUMATIC FOR HEAVY VEHICLES |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9412198D0 (en) * | 1994-06-17 | 1994-08-10 | Sumitomo Rubber Ind | Pneumatic radial tyre |
US5830295A (en) * | 1997-02-14 | 1998-11-03 | The Goodyear Tire & Rubber Company | Pneumatic tire with belt structure including reinforced gum strips |
US10836212B2 (en) * | 2015-08-06 | 2020-11-17 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1586370A (en) * | 1968-06-18 | 1970-02-20 | ||
JPS5291203A (en) * | 1976-01-21 | 1977-08-01 | Firestone Tire & Rubber Co | Pneumatic tire |
-
1978
- 1978-11-04 DE DE19782847926 patent/DE2847926A1/en not_active Withdrawn
-
1979
- 1979-10-19 GB GB7936440A patent/GB2038248B/en not_active Expired
- 1979-10-19 IT IT26670/79A patent/IT1124633B/en active
- 1979-10-19 IT IT7922920U patent/IT7922920V0/en unknown
- 1979-11-05 FR FR7927245A patent/FR2440838A1/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4635696A (en) * | 1982-10-18 | 1987-01-13 | The Goodyear Tire & Rubber Company | Radial tires and a belt structure therefor |
FR2887808A1 (en) * | 2005-06-30 | 2007-01-05 | Michelin Soc Tech | PNEUMATIC FOR HEAVY VEHICLES |
WO2007003557A1 (en) * | 2005-06-30 | 2007-01-11 | Société de Technologie Michelin | Tyre for heavy vehicles |
US8291951B2 (en) | 2005-06-30 | 2012-10-23 | Michelin Recherche Et Technique S.A. | Tire for heavy vehicles |
Also Published As
Publication number | Publication date |
---|---|
IT7922920V0 (en) | 1979-10-19 |
IT7926670A0 (en) | 1979-10-19 |
FR2440838B1 (en) | 1983-11-18 |
IT1124633B (en) | 1986-05-07 |
DE2847926A1 (en) | 1980-05-14 |
GB2038248B (en) | 1983-05-11 |
FR2440838A1 (en) | 1980-06-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |