CA1223186A - Bead-building component for pneumatic vehicle tires - Google Patents
Bead-building component for pneumatic vehicle tiresInfo
- Publication number
- CA1223186A CA1223186A CA000470588A CA470588A CA1223186A CA 1223186 A CA1223186 A CA 1223186A CA 000470588 A CA000470588 A CA 000470588A CA 470588 A CA470588 A CA 470588A CA 1223186 A CA1223186 A CA 1223186A
- Authority
- CA
- Canada
- Prior art keywords
- bead
- tire
- building component
- bead core
- rubber member
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A bead-building component for a pneumatic vehicle tire, and a tire equipped with such a component.
In order to achieve as exact a disposition of the bead core in the tire bead as possible, the bead-building component is prevulcanized prior to its insertion into an unfinished tire. The position of the bead core relative to the profiled rubber member during prevul-canization is fixed by means of spacer elements in the profiled member and/or on the vulcanizing mold.
A bead-building component for a pneumatic vehicle tire, and a tire equipped with such a component.
In order to achieve as exact a disposition of the bead core in the tire bead as possible, the bead-building component is prevulcanized prior to its insertion into an unfinished tire. The position of the bead core relative to the profiled rubber member during prevul-canization is fixed by means of spacer elements in the profiled member and/or on the vulcanizing mold.
Description
BEAD-BUILDING COMPONENT ~OR
PNEUMATIC VEHICLE TIRES
Background of the Invention The present invèntion relates to an annular bead-buildin~ component for pne~lla~ic vehicle tires, and has a pull-resistant and/or compression resistant bead core of load-carriers of metal or a material of similar high streng~h, and also has a profiled rubber member whlcil at least predominantly surrounds the bead core. The present invention also relates to a pneumatic vehicle tire equipped with such a bead-buil~in~ compon-ent.
A vehicle wheel and tire assembly has been pro-posed according to which the beads of a tire are mounte~
on the raclially inner periphery of a one-piece rim, and according to which, in order to eliminate a deep mount-ing bed, the bead cores are eccentrically disposed in the tire beads in such a way that when the tire is mounted, ~he distance Erom the center of a core cross-section to the radially outer edge of the bead is greater than the di~tance to the axially inner edge oE
the bead, Since ~ the manufacture of such a tire is a question o~ ex~remely smAll tolerances with regard to the exact dispositiorl of the bead core in the tire bead, it is an object of the present invention ~o set forth ~,~
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a way in which this can be reliably achieved.
Brief Description of ~he Drawings This object, and other objects and advantageso the present inven~ion, will appear more clearly fron ~he ollowing speciication in conjunction wi~h the accompanying drawings, in which:
Figure 1 is a perspective view o~ a portion of one inventive embodiment o a bead-building component;
Figure 2 is a radial partial section of an inventive bead-building component in a vulcanizing rnold;
Figure 3 is a partial radial section of a bead-building component in which is embedded a spiral spring;
Figure 4 shows a ~ilament with balls on it which serves as a spacer element;
Figure S is a radial par~ial sec~ion showing a tire which is in the vulcanizing position and in which is installed an inventive bead-building component; an~
Figure 6 is a yartial radial section of a vehicle wheel and tlre assembly.
Summary oE the Invention By one aspect of this invention, there is pro-vicled an annular bead-building component or : `'`'' ':'`' ~ ' .. ,, ~ ::
~ ~ 3 ~ ~ 6 pneumatic vehicle tires, said component comprising a pull~resistant and/or compression resistant bead core of load-carriers made of ~etal or some other material of similar hi~h strength, and also corn-prising a profiled rubber member which at least pre-dominantly surrounds said bead core; the improvement wherein said bead-building component is a component which, prior to its installation into an unfinished tire, has been prevulcanized in a vulcanizing mold;
and wherein spacer elements are provided in at least one of said profiled rubber member and said vulcan-izing mold for fixing the position of said bead core relative to said profiled rubber member during said prevulcanization.
Due to the inventive utilization of a pre-vulcanized bead-building component, an already formed component is inserted durin~ the process of ~inishing the tire; as a resuLt oE its inherent stability, this component predetermines the contour of the tire beads after the vulcanLzation of the entire tire. Pursuant to one advanta~eous embodiment o~ the present invention, the bead-building component, which has an essentially round cross-section, is provided at one location with a circumEerential fixin~ rib which during the finishing of the tire is disposed betweerl the carcass and the looped-around carcass end. As a result, the bead-.; ' ' ' . ::
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building component can no longer alter its position in ~he ~ire vulcanizin~ mold during vulcanization, so that the position of the bead core within the final tire bead is also fixed.
The manufacture of the inventive bead-building component is advantageously carried out in a separate vulcanizing mode, with a bead core irst being placed therein, and the space then being filled by disposing or spraying rubber therein. It is particularly impor-tant that measures be taken in order to precisely fixthe positon of the bead core within the cross-section of the profiled rubber member. Such rQeasures can, on the one hand, comprise provicling the vulcanizing mold with spacer elements in the fornl of pins or cross-pieces; on the other hand, spacer elements such as circumferential spiral springs can be permanently embedded in the profiled rubber member o~ the bead-buil~ing corrlponent.
Pursuant to further specific embodirnents of tlle present lnven~ion, a textile Eabric may be disposed be-tween the profiled rubber member and the bead core in or~er to provida for a relative pivotabili~y o~
the two. Such a relative pivotability can also be provided by permanentlY disposing spacer elements in the proiled rubber mernber.
The bead core can be eccentrically disposed in ~ _ - .: '' , . ~
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the profiled rubber member in such a way that when the tire is mounted, the distance from the cen~er of the core to that edge of the profiled rubber rnember which faces the rim seating surface is con-siderably greater than is the distance fro~ the center of the core to the axially inwardly dis-posed edge of the profiled member, with four times this difference in length corresponding approximate-ly to the height of a rim flange.
A pneumatic vehicle tire which is equipped with the inventive bead-building component is characterized in that the tire carcass is anchored in the tire bead by being looped around the bead-building component, and in that the fixing rib of the bead-building component extends into the space between the tire carcass and the looped-around car-cass end.
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Description of Preferred Embodiments Rererring now to the drawings in detail, the annular bead-building component oE Fig. 1 comprises a profiled rubber member 1, and a bead core 2 which is embedded therein. The bead core 2 princlpally comprises a cable core having a plurality of metal cables 3 which are grouped about an inner core 4. The cable core 2 is covered with a textile Eabric 5 which is embedded with an intentionally slight adhesion to the adjacent portions of the bea~-building component.
There thus results a consi~erable ability oE the pro-filed rubber member 1 to pivot about the bead core 2, so that a so-called pivoting bead results after the bead-building component is inserted into the tire.
The building component illus~rated in Fig. 1 has an essentially round cross sectional shape, from which the only deviation i9 at a downward angle, i.e. on the radially inner side, due to a circum~erential, pointed fixi.n~ rib 6 o the rnaterial o~ the proEiled rubber rnember 1. IE necessary, the Eixin~ rib 6 can also com-pr:ise a rubber havin~ a different Shore har~nes~. A
hardness Oe about 90 Shore A (aEter the vulcanization of the complete kire) has proven to be expedient for the profile~ rubber member 1, As will become clear from the subsequent description o~ the vehicle wheel and tire assembly, the bead-building component of ~ ~ 3~ ~ ~
Fig, 1, provides a tire, the beads o~ which are mounted under pretension on the rim in such a way that it can pivot on its own into another position when pressure is los~.
Fig. 2 shows a bead-building component which is still located in a vulcanizing mold 7. Since it is very importan~ that the bead core 2 assume a very specific position with as slight a tolerance as possible within the cross-sectional area of the pro-~iled rubber member 1, and that it also ~aintains thisposition during the preliminary vulcaniæation, spacer elements 8 in the form of holding pins or at least partially circumferential holding ribs are disposed in the bottom half o~ the vulcanizin~ mold 7. ~uring the preliminary vulcanization, the bead core 2, due to its great weight, rests upon ~he spacer elements ~ of the rnold 7, so that it cannot "swim away" in the so~t rubber which surrounds it, The openings which remain due to the holding pins or holding ribs 8 after the mold has been rernoved are closed off by pushing ru~er into them prior to insertlng the bead-building corrlponent into the tire, or during vulcanization of the tire.
I~ should also ba noted that with the bead-build-ing component o~ Fig. 2, the tip of the ~ixing rib 6 is directed upwardly, and the shortest distance from the bead core 2 to the edge of the bead-building component : . ' :~' `" ' ~ :
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is disposed at the opposite side in the lower re~ion.
As a result, after insertion into the tire, and af~er the tire is mounted, the Eixillg rib is directed, free of tension, pret~y much exactly axially outwardly, so that the bead region of the tire is mounted on the rim without pretension.
In ~he bead-building cornponent of Fig, 3, a circumferential spiral sprin~, 9 is disposed within tlle profiled rubber member 1, The spiral spring ~ also serves as a spacer element ~or tlle exact positioning f the bead core ~, and can either be used in addition ~o the holding pins or holding ribs 8 of the vulcanizing mold 7, or in place thereof. The interior of the spiral spring 9 shoul~ be filled with rubber. It is important to use a spiral spring 9 rather than a some-what similarly shaped metal ring, so that the relative ability of the profiled rubber member 1 to pivot about the bead core 2 is maintained (the axes of rotation are, in sections, portions oE thc bead core 2). In place oE the spiral s~ring 9, a fil~ment 10 with balls 11 on it, such as shown in Fl~, 4, can also be used;
the balls 11 also serve as spacer elements, and can comprise a prevulcani.zed rub~er or some other material.
Since the important thing is the spacing function o~ the "balls",and not the geometric shape thereof, quite differently shaped elements 11 can also be used which . .
, ' ~ ~ 3 ~ ~ ~
effect an even be~ter keying or wedging o the bead core 2 i-n the vulcanizing mold.
Fig 5 shows a portion of a tire in which a bead-building component has been installed. The tip of the fixing rib 6, in the relaxed state, is directed axially i~lwardly relative to the axial direction of a winding drum. In this position, the tip of the fixing rib 6 extends into the space between the tire carcass 12 and the looped-around carcass end 13, so that a twisting or turning of the profiled rubber member 1 relative to the carcass 12 is no~ possible. This tire is vulcanized with the walls 14 disposed laterally outwar~ly, as can be seen rom the indicated axial ~irection o~ the heatin~ or vulcanizing mold. This achieves an easier molding oE the bead portions dis-posed within the tire. To mount the tire, the tire walls 14 are turned inwardly, In so doing, the tire beads 15 with the proEiled rubber members l carry out a pivo~ing movement about their respective bead core
PNEUMATIC VEHICLE TIRES
Background of the Invention The present invèntion relates to an annular bead-buildin~ component for pne~lla~ic vehicle tires, and has a pull-resistant and/or compression resistant bead core of load-carriers of metal or a material of similar high streng~h, and also has a profiled rubber member whlcil at least predominantly surrounds the bead core. The present invention also relates to a pneumatic vehicle tire equipped with such a bead-buil~in~ compon-ent.
A vehicle wheel and tire assembly has been pro-posed according to which the beads of a tire are mounte~
on the raclially inner periphery of a one-piece rim, and according to which, in order to eliminate a deep mount-ing bed, the bead cores are eccentrically disposed in the tire beads in such a way that when the tire is mounted, ~he distance Erom the center of a core cross-section to the radially outer edge of the bead is greater than the di~tance to the axially inner edge oE
the bead, Since ~ the manufacture of such a tire is a question o~ ex~remely smAll tolerances with regard to the exact dispositiorl of the bead core in the tire bead, it is an object of the present invention ~o set forth ~,~
.
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a way in which this can be reliably achieved.
Brief Description of ~he Drawings This object, and other objects and advantageso the present inven~ion, will appear more clearly fron ~he ollowing speciication in conjunction wi~h the accompanying drawings, in which:
Figure 1 is a perspective view o~ a portion of one inventive embodiment o a bead-building component;
Figure 2 is a radial partial section of an inventive bead-building component in a vulcanizing rnold;
Figure 3 is a partial radial section of a bead-building component in which is embedded a spiral spring;
Figure 4 shows a ~ilament with balls on it which serves as a spacer element;
Figure S is a radial par~ial sec~ion showing a tire which is in the vulcanizing position and in which is installed an inventive bead-building component; an~
Figure 6 is a yartial radial section of a vehicle wheel and tlre assembly.
Summary oE the Invention By one aspect of this invention, there is pro-vicled an annular bead-building component or : `'`'' ':'`' ~ ' .. ,, ~ ::
~ ~ 3 ~ ~ 6 pneumatic vehicle tires, said component comprising a pull~resistant and/or compression resistant bead core of load-carriers made of ~etal or some other material of similar hi~h strength, and also corn-prising a profiled rubber member which at least pre-dominantly surrounds said bead core; the improvement wherein said bead-building component is a component which, prior to its installation into an unfinished tire, has been prevulcanized in a vulcanizing mold;
and wherein spacer elements are provided in at least one of said profiled rubber member and said vulcan-izing mold for fixing the position of said bead core relative to said profiled rubber member during said prevulcanization.
Due to the inventive utilization of a pre-vulcanized bead-building component, an already formed component is inserted durin~ the process of ~inishing the tire; as a resuLt oE its inherent stability, this component predetermines the contour of the tire beads after the vulcanLzation of the entire tire. Pursuant to one advanta~eous embodiment o~ the present invention, the bead-building component, which has an essentially round cross-section, is provided at one location with a circumEerential fixin~ rib which during the finishing of the tire is disposed betweerl the carcass and the looped-around carcass end. As a result, the bead-.; ' ' ' . ::
. ~ , .
"'' -' ~2 ~ 3~ 8~
building component can no longer alter its position in ~he ~ire vulcanizin~ mold during vulcanization, so that the position of the bead core within the final tire bead is also fixed.
The manufacture of the inventive bead-building component is advantageously carried out in a separate vulcanizing mode, with a bead core irst being placed therein, and the space then being filled by disposing or spraying rubber therein. It is particularly impor-tant that measures be taken in order to precisely fixthe positon of the bead core within the cross-section of the profiled rubber member. Such rQeasures can, on the one hand, comprise provicling the vulcanizing mold with spacer elements in the fornl of pins or cross-pieces; on the other hand, spacer elements such as circumferential spiral springs can be permanently embedded in the profiled rubber member o~ the bead-buil~ing corrlponent.
Pursuant to further specific embodirnents of tlle present lnven~ion, a textile Eabric may be disposed be-tween the profiled rubber member and the bead core in or~er to provida for a relative pivotabili~y o~
the two. Such a relative pivotability can also be provided by permanentlY disposing spacer elements in the proiled rubber mernber.
The bead core can be eccentrically disposed in ~ _ - .: '' , . ~
.. ,~ ' ' ' .
~ ~ ~ 3 ~ 8~
the profiled rubber member in such a way that when the tire is mounted, the distance from the cen~er of the core to that edge of the profiled rubber rnember which faces the rim seating surface is con-siderably greater than is the distance fro~ the center of the core to the axially inwardly dis-posed edge of the profiled member, with four times this difference in length corresponding approximate-ly to the height of a rim flange.
A pneumatic vehicle tire which is equipped with the inventive bead-building component is characterized in that the tire carcass is anchored in the tire bead by being looped around the bead-building component, and in that the fixing rib of the bead-building component extends into the space between the tire carcass and the looped-around car-cass end.
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Description of Preferred Embodiments Rererring now to the drawings in detail, the annular bead-building component oE Fig. 1 comprises a profiled rubber member 1, and a bead core 2 which is embedded therein. The bead core 2 princlpally comprises a cable core having a plurality of metal cables 3 which are grouped about an inner core 4. The cable core 2 is covered with a textile Eabric 5 which is embedded with an intentionally slight adhesion to the adjacent portions of the bea~-building component.
There thus results a consi~erable ability oE the pro-filed rubber member 1 to pivot about the bead core 2, so that a so-called pivoting bead results after the bead-building component is inserted into the tire.
The building component illus~rated in Fig. 1 has an essentially round cross sectional shape, from which the only deviation i9 at a downward angle, i.e. on the radially inner side, due to a circum~erential, pointed fixi.n~ rib 6 o the rnaterial o~ the proEiled rubber rnember 1. IE necessary, the Eixin~ rib 6 can also com-pr:ise a rubber havin~ a different Shore har~nes~. A
hardness Oe about 90 Shore A (aEter the vulcanization of the complete kire) has proven to be expedient for the profile~ rubber member 1, As will become clear from the subsequent description o~ the vehicle wheel and tire assembly, the bead-building component of ~ ~ 3~ ~ ~
Fig, 1, provides a tire, the beads o~ which are mounted under pretension on the rim in such a way that it can pivot on its own into another position when pressure is los~.
Fig. 2 shows a bead-building component which is still located in a vulcanizing mold 7. Since it is very importan~ that the bead core 2 assume a very specific position with as slight a tolerance as possible within the cross-sectional area of the pro-~iled rubber member 1, and that it also ~aintains thisposition during the preliminary vulcaniæation, spacer elements 8 in the form of holding pins or at least partially circumferential holding ribs are disposed in the bottom half o~ the vulcanizin~ mold 7. ~uring the preliminary vulcanization, the bead core 2, due to its great weight, rests upon ~he spacer elements ~ of the rnold 7, so that it cannot "swim away" in the so~t rubber which surrounds it, The openings which remain due to the holding pins or holding ribs 8 after the mold has been rernoved are closed off by pushing ru~er into them prior to insertlng the bead-building corrlponent into the tire, or during vulcanization of the tire.
I~ should also ba noted that with the bead-build-ing component o~ Fig. 2, the tip of the ~ixing rib 6 is directed upwardly, and the shortest distance from the bead core 2 to the edge of the bead-building component : . ' :~' `" ' ~ :
:, . , ,. ,: ,, ~2 ~ 3 ~ ~
is disposed at the opposite side in the lower re~ion.
As a result, after insertion into the tire, and af~er the tire is mounted, the Eixillg rib is directed, free of tension, pret~y much exactly axially outwardly, so that the bead region of the tire is mounted on the rim without pretension.
In ~he bead-building cornponent of Fig, 3, a circumferential spiral sprin~, 9 is disposed within tlle profiled rubber member 1, The spiral spring ~ also serves as a spacer element ~or tlle exact positioning f the bead core ~, and can either be used in addition ~o the holding pins or holding ribs 8 of the vulcanizing mold 7, or in place thereof. The interior of the spiral spring 9 shoul~ be filled with rubber. It is important to use a spiral spring 9 rather than a some-what similarly shaped metal ring, so that the relative ability of the profiled rubber member 1 to pivot about the bead core 2 is maintained (the axes of rotation are, in sections, portions oE thc bead core 2). In place oE the spiral s~ring 9, a fil~ment 10 with balls 11 on it, such as shown in Fl~, 4, can also be used;
the balls 11 also serve as spacer elements, and can comprise a prevulcani.zed rub~er or some other material.
Since the important thing is the spacing function o~ the "balls",and not the geometric shape thereof, quite differently shaped elements 11 can also be used which . .
, ' ~ ~ 3 ~ ~ ~
effect an even be~ter keying or wedging o the bead core 2 i-n the vulcanizing mold.
Fig 5 shows a portion of a tire in which a bead-building component has been installed. The tip of the fixing rib 6, in the relaxed state, is directed axially i~lwardly relative to the axial direction of a winding drum. In this position, the tip of the fixing rib 6 extends into the space between the tire carcass 12 and the looped-around carcass end 13, so that a twisting or turning of the profiled rubber member 1 relative to the carcass 12 is no~ possible. This tire is vulcanized with the walls 14 disposed laterally outwar~ly, as can be seen rom the indicated axial ~irection o~ the heatin~ or vulcanizing mold. This achieves an easier molding oE the bead portions dis-posed within the tire. To mount the tire, the tire walls 14 are turned inwardly, In so doing, the tire beads 15 with the proEiled rubber members l carry out a pivo~ing movement about their respective bead core
2 while buildin~ up a pretension; at the same time, they carry out an axially inward movement. The result o~
this pretension isthatthe tire, i.n the mounted state, presses with its beads lS against the rim ~langes even before the tire is inflated with air, t~us achieving a scaling and simplifying inflation. The ribs 16 shown on the outside of the tire of Fig. 5 serve to simpliEy Mounting of the tire.
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Fig. 6 illus~rates a vehicle wheel on which a tire is completely mounted. Shown is a bel~ed tire having a radial carcass 12, though a bias carcass could also be used. By being looped around the bead-building components, the ends of the carcass 12 are anchored in the beads 15. The tire also has a customary belt 17. The tire is mounted on the rim 18 in such a way that the bead seating surfaces are located on sea~ing surfaces disposed radially inwardly of the rim ring 19 next to the inwardly extendin~
; rim flanges 20 on the rim 18.
The tire beads 15, in a Eo~n ~itting manner, substantially fill a space delimited by the rim flanges 20, the rim seating surfaces, and parts 21 of the rim rinK 19 which in cross section extend essentially vertically. As a result of the vertical parts 21, a standard drop-well 22 is formed on the radially outer side of the rim 1~. For very wide tires, this dro~-well 22 can help during mounting in more easily moving the tire over the one~piece rim 18. In order to even be able to mount the tire at all on the one-piece rim 18, which in contrast to known rims has no deep mounting bed~next to the rim seatin~, sur~aces ~or the beads 15, it is important that the bead core 2 be eccentrically mounted in the predominantly round profiled rubber rnernber 1, an~ hence in the tire bead 15, in such a way that ~ ....
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when the tire is mounted, the distance from the center of the cross-section of the core to the radially ou~er edOe of the bead is greater than the dis~ance to the axially inner ed~e of the bead. Furthen.lore, the aforementioned ability o~ the tire bead 15 to pivot abou~ the core 2 is necessary.
In order to mount the tire, the axis of rotation of the rim 18 is first disposed a~ right angles to the axis o rotation of the tire, whereupon the rim is moved into the interior of the tire, where it is rotated by 90, so that the two tire beads 15 are disposed laterally outwardly next to the rim flan~es 20.
One of the beads 15 is subsequently pivoted or twisted inwar~ly to such an extent that the region where the bead core 2 i5 closest to the edge of the bead is dis-posed radially outwardly. At one location, this region is then pushed over ~he rim Elange 20 onto the rim seating surface; the process is then repeated in sections alon~ the entire ~erlphery. Finally, the tire bead 15 is pivo~ed bac~ into the operating position o~ the tire, whereby the e~Eective diameter of the tire in the radial-ly outer portion of the tire bead 15 is increase~ to such an extent that the tire obtains a rig:Ld seat on the rim 18.
Dependin~ upon the design of the bead-buildin~
component, the tire bead 15 can, in the operating state, . .
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~ ~ 3~ ~ 6 be free o tensîon, have a twisting moment in the closing sense (pressing against the rir.l flange 20~, or have a twis~ing moment in the opening sense (turn-ing into the mounting position). It is readily apparent that the first situation occurs during installation of a bead-building component of the type shown in Figs. 2 and 3, while the second situation occurs for a component of the type shown in Fig, 5.
The third situation occurs for a component of the type shown in Fig. 1 if the bead-building components of Figs 1 to 5 are represented in a tension-free state.
In Fig. 1, the fixing rib 6 is directed radially in-wardly, in Fi~s. 2 and 3 it is directed axially out-wardly, and in Fig, S it is directed axially inwardly, whereas in the operating position of the tire it is always ~irected axially outwardly.
It should be noted that the present invention is applicablc not only for eccentrically ~isposed bea~
cores 2, but also in tires which are mounted radially outwardly on the rim.
The present invention is, o~ course, in no way restricted to the specific disclosure of the specifi-ca~ion and drawlngs, but also encompasses any modifi-ca~ions within the scope o~ the appended claims.
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this pretension isthatthe tire, i.n the mounted state, presses with its beads lS against the rim ~langes even before the tire is inflated with air, t~us achieving a scaling and simplifying inflation. The ribs 16 shown on the outside of the tire of Fig. 5 serve to simpliEy Mounting of the tire.
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Fig. 6 illus~rates a vehicle wheel on which a tire is completely mounted. Shown is a bel~ed tire having a radial carcass 12, though a bias carcass could also be used. By being looped around the bead-building components, the ends of the carcass 12 are anchored in the beads 15. The tire also has a customary belt 17. The tire is mounted on the rim 18 in such a way that the bead seating surfaces are located on sea~ing surfaces disposed radially inwardly of the rim ring 19 next to the inwardly extendin~
; rim flanges 20 on the rim 18.
The tire beads 15, in a Eo~n ~itting manner, substantially fill a space delimited by the rim flanges 20, the rim seating surfaces, and parts 21 of the rim rinK 19 which in cross section extend essentially vertically. As a result of the vertical parts 21, a standard drop-well 22 is formed on the radially outer side of the rim 1~. For very wide tires, this dro~-well 22 can help during mounting in more easily moving the tire over the one~piece rim 18. In order to even be able to mount the tire at all on the one-piece rim 18, which in contrast to known rims has no deep mounting bed~next to the rim seatin~, sur~aces ~or the beads 15, it is important that the bead core 2 be eccentrically mounted in the predominantly round profiled rubber rnernber 1, an~ hence in the tire bead 15, in such a way that ~ ....
, ~ " ' '' ,' ' ' . .
~ ~ ~ 3~ ~ ~
when the tire is mounted, the distance from the center of the cross-section of the core to the radially ou~er edOe of the bead is greater than the dis~ance to the axially inner ed~e of the bead. Furthen.lore, the aforementioned ability o~ the tire bead 15 to pivot abou~ the core 2 is necessary.
In order to mount the tire, the axis of rotation of the rim 18 is first disposed a~ right angles to the axis o rotation of the tire, whereupon the rim is moved into the interior of the tire, where it is rotated by 90, so that the two tire beads 15 are disposed laterally outwardly next to the rim flan~es 20.
One of the beads 15 is subsequently pivoted or twisted inwar~ly to such an extent that the region where the bead core 2 i5 closest to the edge of the bead is dis-posed radially outwardly. At one location, this region is then pushed over ~he rim Elange 20 onto the rim seating surface; the process is then repeated in sections alon~ the entire ~erlphery. Finally, the tire bead 15 is pivo~ed bac~ into the operating position o~ the tire, whereby the e~Eective diameter of the tire in the radial-ly outer portion of the tire bead 15 is increase~ to such an extent that the tire obtains a rig:Ld seat on the rim 18.
Dependin~ upon the design of the bead-buildin~
component, the tire bead 15 can, in the operating state, . .
,.
. ~ ;, .,. ,~ ,.
~ ~ 3~ ~ 6 be free o tensîon, have a twisting moment in the closing sense (pressing against the rir.l flange 20~, or have a twis~ing moment in the opening sense (turn-ing into the mounting position). It is readily apparent that the first situation occurs during installation of a bead-building component of the type shown in Figs. 2 and 3, while the second situation occurs for a component of the type shown in Fig, 5.
The third situation occurs for a component of the type shown in Fig. 1 if the bead-building components of Figs 1 to 5 are represented in a tension-free state.
In Fig. 1, the fixing rib 6 is directed radially in-wardly, in Fi~s. 2 and 3 it is directed axially out-wardly, and in Fig, S it is directed axially inwardly, whereas in the operating position of the tire it is always ~irected axially outwardly.
It should be noted that the present invention is applicablc not only for eccentrically ~isposed bea~
cores 2, but also in tires which are mounted radially outwardly on the rim.
The present invention is, o~ course, in no way restricted to the specific disclosure of the specifi-ca~ion and drawlngs, but also encompasses any modifi-ca~ions within the scope o~ the appended claims.
, .
', ;, , :
,, ~ , , ~ . ..
, .~ ,...... .
,
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An annular bead-building component for pneumatic vehicles tires, said component comprising a pull-resistant and/or compression resistant bead core of load-carries made of metal or some other material of similar high strength, and also comprising a pro-filed rubber member which has a predetermined cross-section except for a circumferential pointed portion therewith and which at least predominantly surrounds said bead core;
comprising furthermore the improvement therewith wherein said annular bead-building component for pneumatic verhicle tires, prior to installation of said annular bead-building component into an unfinished tire, has been prevulcanized in a vulcanizing mold;
and wherein spacer elements are provided in at least one of said profiled rubber member and said vulcan-izing mold for fixing the position of said bead core relative to said profiled rubber member during said prevulcanization.
comprising furthermore the improvement therewith wherein said annular bead-building component for pneumatic verhicle tires, prior to installation of said annular bead-building component into an unfinished tire, has been prevulcanized in a vulcanizing mold;
and wherein spacer elements are provided in at least one of said profiled rubber member and said vulcan-izing mold for fixing the position of said bead core relative to said profiled rubber member during said prevulcanization.
2. A bead-building component according to claim 1, which includes a textile fabric disposed between said profiled rubber member and said bead core in order to provide a pivotability of said member and said core relative to one another.
3. A bead-building component according to claim 1, which includes spacer elements which are permanently disposed in said profiled rubber member, and which permit a rotary movement of said member and said bead core relative to one another.
4. A bead-building component according to claim 1, in which said spacer elements for fixing the position of said bead core are in the form of pins in said vulcanizing mold.
5. A bead-building component according to claim 1, in which said spacer elements for fixing the position of said bead core are in the form of cross-pieces in said vulcanizing mold.
6. A bead-building component according to claim 1, in which said bead core is eccentrically disposed in said profiled rubber member in such a way that when said component is in a tire which is mounted on a rim which has respective seating surfaces for each tire bead and a rim flange adjacent to each seating surface, the distance from the center of said bead core to that edge of said profiled member which faces its rim seating surface is considerably greater than the distance from the center of said bead core to the axially inwardly disposed edge of said profiled member; four times the difference in these distances corresponds approximately to the height of said rim flange.
7. A bead-building component according to claim 1, in which said profiled rubber member has an essentially round cross-section, with the exception of a fixing rib which is provided at one spot along the cross-sectional periphery.
8. A pneumatic tire which is provided with two of the bead-building components of claim 7, said tire comprising respective bead portions, each of which includes therein a respective one of said components, and also comprising a carcass which is anchored in each of said bead portions by having the ends thereof looped around respective ones of said components, with a respective space being formed between said carcass and each of said looped-around ends; said fixing ribs of said components extend into a respective one of said spaces.
9. A method of producing an annular bead-building component for pneumatic vehicle tires, which component comprises a pull resistant and/or compres-sion resistant bead core of load-carries, and also comprises a profiled rubber member which includes a circumferential, pointed fixing rib and which at least predominantly surrounds said bead core; said method further including the steps of:
prevulcanizing said bead-building component in a vulcanizing mold prior to its instal-lation into an unfinished tire; and providing spacer elements in at least one of said profiled rubber member and said vulcanizing mold to fix the position of said bead core relative to said profiled rubber member during said pre-vulcanizing step.
prevulcanizing said bead-building component in a vulcanizing mold prior to its instal-lation into an unfinished tire; and providing spacer elements in at least one of said profiled rubber member and said vulcanizing mold to fix the position of said bead core relative to said profiled rubber member during said pre-vulcanizing step.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833346107 DE3346107A1 (en) | 1983-12-21 | 1983-12-21 | BULB COMPONENT FOR AIR TIRES |
| DEP3346107.4 | 1983-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1223186A true CA1223186A (en) | 1987-06-23 |
Family
ID=6217503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000470588A Expired CA1223186A (en) | 1983-12-21 | 1984-12-20 | Bead-building component for pneumatic vehicle tires |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0146715B1 (en) |
| JP (1) | JPS60176749A (en) |
| AT (1) | ATE57502T1 (en) |
| CA (1) | CA1223186A (en) |
| DE (2) | DE3346107A1 (en) |
| ES (1) | ES282476Y (en) |
| GR (1) | GR80876B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529511C2 (en) * | 1985-08-17 | 1993-11-25 | Continental Ag | Process for manufacturing a pneumatic vehicle tire |
| DE3602873A1 (en) * | 1986-01-31 | 1987-08-06 | Continental Gummi Werke Ag | BULB CORE FOR AIR TIRES |
| DE8803348U1 (en) * | 1988-03-12 | 1989-07-06 | Uniroyal Englebert Reifen GmbH, 5100 Aachen | Pneumatic vehicle tires |
| DE3808278A1 (en) * | 1988-03-12 | 1989-09-21 | Uniroyal Englebert Gmbh | VEHICLE TIRES |
| US5201972A (en) * | 1988-06-14 | 1993-04-13 | Continental Aktiengesellschaft | Pneumatic vehicle tire having beads that are turnable |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1139643A (en) * | 1965-03-06 | 1969-01-08 | Dunlop Co Ltd | Manufacture of cast articles |
| DE2159083A1 (en) * | 1971-11-29 | 1973-05-30 | Continental Gummi Werke Ag | FOOT RING FOR VEHICLE TIRES |
| FR2303676A1 (en) * | 1975-03-12 | 1976-10-08 | Uniroyal | PROCESS FOR TREATING A PNEUMATIC BANDAGE WRAP TO AVOID CREEPING OF THE WEAR STRIPS OF THE HEELS |
| US4168193A (en) * | 1976-06-23 | 1979-09-18 | The Firestone Tire & Rubber Company | Method of manufacturing rubber articles and means for carrying out said method |
| DE2830939C2 (en) * | 1978-07-14 | 1982-07-29 | Phoenix Ag, 2100 Hamburg | Mold with a mold core for manufacturing pneumatic motor vehicle tires from castable plastic |
| DE3007772A1 (en) * | 1980-02-29 | 1981-09-17 | Metzeler Kautschuk GmbH, 8000 München | Bead rope location in tyre mould - by spring steel pins across stranded rope |
| FR2485449A1 (en) * | 1980-06-24 | 1981-12-31 | Michelin & Cie | REINFORCEMENT FOR TIRES MANUFACTURED BY MOLDING |
| DE3244046A1 (en) * | 1982-11-27 | 1984-05-30 | Continental Gummi-Werke Ag, 3000 Hannover | VEHICLE WHEEL |
-
1983
- 1983-12-21 DE DE19833346107 patent/DE3346107A1/en not_active Withdrawn
-
1984
- 1984-10-20 EP EP84112696A patent/EP0146715B1/en not_active Expired - Lifetime
- 1984-10-20 DE DE8484112696T patent/DE3483419D1/en not_active Expired - Lifetime
- 1984-10-20 AT AT84112696T patent/ATE57502T1/en not_active IP Right Cessation
- 1984-11-07 GR GR80876A patent/GR80876B/en unknown
- 1984-11-08 ES ES1984282476U patent/ES282476Y/en not_active Expired
- 1984-12-20 CA CA000470588A patent/CA1223186A/en not_active Expired
- 1984-12-21 JP JP59268729A patent/JPS60176749A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ES282476Y (en) | 1985-12-01 |
| DE3483419D1 (en) | 1990-11-22 |
| JPS60176749A (en) | 1985-09-10 |
| EP0146715A3 (en) | 1986-12-17 |
| GR80876B (en) | 1984-12-20 |
| ATE57502T1 (en) | 1990-11-15 |
| EP0146715A2 (en) | 1985-07-03 |
| ES282476U (en) | 1985-05-01 |
| EP0146715B1 (en) | 1990-10-17 |
| DE3346107A1 (en) | 1985-07-04 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |