DE19624766A1 - Construction of pneumatic tyre on rim with separable drum section - Google Patents

Abstract

This pneumatic tyre and rim accord with patent no. P 44 46 234.4. The tyre is mounted on the rim before vulcanisation. The axial extent of the rim may be varied before vulcanisation. Suitable sealing is incorporated. Also claimed is the manufacture of a tyre in accordance with P 44 46 234.4. Before vulcanisation, the structural materials of the tyre are placed on the rim, which is then reduced in its axial extent, i.e. closed together and sealed. After this contraction, before vulcanisation, the tyre materials are expanded radially, to produce the torus form of the tyre. Also claimed are: use of a rim to make the tyre; and its application as an element of the chamber used in application of internal pressure to the tyre, during vulcanisation.

Description

The invention relates to a vehicle wheel according to the patent application P 44 46 234.4 consisting of one rim and one Pneumatic vehicle tires and a method for producing a Vehicle wheel according to patent application P 44 46 234.4 and Using a rim of a vehicle wheel. Conventional Pneumatic vehicle tires are usually first on special construction machines with cylindrical construction drums built up. The tire blanks equipped with bead cores are then bombed and receive theirs Tire torus shape. This is the case with belted tires formed carcass package with a prefabricated put on a tread package including a belt connected. The cylindrical building drum enables an almost axially elongated simple and precise construction the carcass. Only in a second process step through the bombage the radial elevation to generate the Torus shape causes.

A tire built reliably and safely in this way Blank of conventional design is usually followed by vulcanized the complete structure of the tire. Already vulcanized tires are made after vulcanization temporarily stored, transported and at a special one directed assembly point, for example in a workshop or with the original equipment manufacturer, on a rim in a complex process assembled. There are specially trained rims for this required an assembly after vulcanization enable in the first place. For example, such  Rims are usually designed with a drop center. Emergency running properties are only conditional with such rims and unsatisfactory, if at all, achievable. Both when transporting and when storing the tire the tire, which receives no form support from the radial inside, are so loaded that permanent deformations, especially in the core area, and therefore not eccentricities are to be excluded. The one before assembly from a lot number of tires more or less in fit and concentricity than suitable determined with great effort for a special Rim suitable tires and the rim are expensive for this checked for their concentricity and eccentricities, to determine an optimized mounting position with which the Sum of inaccuracies of rim and tire after assembly should be minimized as far as possible. In the following Assembly process can tire and rim despite the elaborate Investigations before assembly for an optimized allocation of a tire to a rim once again loaded indefinitely , which means that further inaccuracies cannot be excluded are.

From DE-OS 21 57 076 a vehicle wheel is known in which a vehicle tire before vulcanization by pinching the axially bent radially outward end regions of a integrally formed rim between carcass plies in front of the Vulcanization is attached. Even if with this tire Eccentricities and concentricity inaccuracies due to storage, Transport and assembly on a special assembly friendly rim after vulcanization This tire is also no longer available in the conventional way Assembled and cambered with a special building drum. Of the Tires must then be taken from the assembly station Building drum and from the crowning device completely be removed and in the still plastic state of radial brought to the inside of the rim unsupported and there in the  Torus shape already produced by Bombage on the rim by pulling the carcass layers apart, then Put on the hereby generated between the carcasses Annular gap can be mounted on the rim flanges. In the Disassembly from the building drum, during transport and during Interim storage and the complex assembly on the Rim flanges can cause deformations and runout inaccuracies are generated after subsequent vulcanization also have a negative impact on the tire and its quality can.

A vehicle tire is known from DE 37 01 513 A1, at that the tire with its after vulcanization Bead cores from the inside radially in a specially designed Rim to be attached. The rim is in its radially outer Area as a support surface for the emergency running of the tire Loss of compressed air is formed inside the tire. Also here are runout problems and eccentricities due to permanent deformations when dismantling the Building drum, during transport, storage or at The tire can be mounted on the rim.

The invention addresses the problem with simple To average a vehicle wheel with higher concentricity testify.

According to the invention, the problem is solved by the vehicle wheel the features of claim 1 and by the method for Manufacture of a vehicle wheel according to the characteristics of Claim 6 and by the use of a rim according to the Features of claim 18 solved.

The formation of the vehicle wheel with before vulcanization the rim built tires with axial in their extension changeable rim already allows the construction of the  Vehicle tire blanks on the rim. The Advantages of the very precise axially elongated structure of the inner tire layers on an almost cylindrical Construction area, namely already on the rim and the subsequent radial elevation to the torus shape namely axial reduction of the axial extent of the rim, such as with conventional tire building methods Assembly drums and bombing devices can be achieved, to be kept. Deformations, concentricity inaccuracies or other inaccuracies caused by removing the Pneumatic vehicle tire blanks from the building drum conventional tires, during transport, during vulcanization and are generated until assembly on the rim. The vehicle tire blank is already centered on the rim built up and directly vulcanized in the centered state. Additional procedural steps for complex Temporary storage of rims on the one hand and tires on the other on the part, as well as for their merging and for only with high Effort to be achieved with conventional vehicle tires Accuracies can be omitted. Additional sealing measures outside the rim in the tire area can be omitted.

The design of the vehicle wheel according to the characteristics of Claim 2 enables a particularly simple design of the Axial changeability of the rim with simple means and low manufacturing and assembly costs.

The formation of the rim with emergency running is advantageous surfaces. Especially here, emergency running properties can be avoided Taking later assembly processes into account better on emergency running can be created to suit the situation. An almost cylindrical one Surface also improves the accuracy of the tire structure.

The axially removable design is preferred Rim element as a tire building drum. The rim is there thus from the tire building drum and other rim elements.  

The tire is conventionally mounted on this rim built up. The tire building drum is then in known concentrically reduced. The remaining Rim elements can then be pushed together. Of the Tire assembly is particularly easy with the inclusion of for the tire production of existing funds.

The training according to the features of claim 5 enables the simple integration of the sealing material, for example an O-ring to seal the rim against loss of compressed air. The structure of the tire is not affected by the sealing material with special needs. The sealing material is not disturbing in the area of the tire material. The rim can be opened and opened repeatedly can be sealed without further measures. The rim can be used to insert a bladder for vulcanization opened and after vulcanization after removing the Bladders are sealed. The finished tire can be done by opening the rim without destroying rubber material be inspected from the inside. The rim bowl can be simple without annoying rubber material, for example a cover layer, be attached.

The method of claim 7 is preferred. The rubber material can be centered and, as in conventional processes be built up axially stretched and by radial elevation in Tire torus shape are brought. The advantages of conventional Tire building procedures can easily be maintained.

The method according to the features of is preferred Claim 8, wherein the axial reduction of the rim by Removing at least one axial element of the rim and then axially move the remaining ones together Rim elements are made. This procedure is particularly simple easy to use and easy to control  automated manufacturing. After removing the Axial elements of the rim can be automated for example, by controlled sliding means remaining rim elements moved towards each other and the The rim can thus be closed.

Preferred because of simpler means in the manufacturing process the procedure is to be carried out according to the characteristics of Claim 9. Advantageously, after axial reduction the rim on the radial inside of the rim at least one sealing rubber layer over the joints of the together pushed rim elements applied. This can cause air emerges between the rims during tire operation elements can be avoided even more safely. At acquaintances two-piece rims for mounting a tire after the Vulcanization is a secure seal only with complex Means to achieve.

The process according to is particularly safe and completely sealed the features of claim 10.

The method for producing a vehicle is preferred tire according to the features of claim 11, wherein after on the rim, as with a conventional building drum, put on and then with their end areas is folded over the rim ends. As well the carcass material, like a conventional on construction drum, first placed axially flat on the inner layer and folded over the ends of the rims. After hanging up the side stripes, like a conventional building drum, and then folding the side strips around the Rim ends, the rim is first axially reduced and that applied carcass package raised by bombage. The way generated tire torus is in connection with a  prepared concentric treadmill package. Of the Tire construction according to this procedure corresponds in its essential order and in the axially elongated Arrangement of the individual layers the conventionally proven Assembly steps with assembly drum. The advantages proven there can therefore also be used to generate a tire Vehicle wheel with the tire on the rim in front of the Vulcanization can be used optimally. Conventional procedures can therefore be used without time-consuming changes.

The method according to the features of claim 12 terminates another advantageous method of manufacturing the vehicle rades. The axially stretched layer formation here the particularly inexpensive and also for automated Manufacturing a tire advantageous all-round process Carcass winding used.

After concentric separation, the radial is preferred carcass layers arranged within the rim Concentric carcass strips removed. Strength Carcass material overlaps in this area as well undesirable high material accumulations due to such Overlaps can thus be avoided.

Preference is given to the separation of the carcass standing carcass ends after axial reduction of the rim sealed together again. This will create a all-round sealed formation of the tire over the entire Toroidal shape enables.

The interior of the tire is preferably provided by the rim through for vulcanization with hot fluid underneath pressure applied. This will make it reliable, accurate Profile image from a last survey in the  Vulcanization trough guaranteed. Hot fluid can additionally vulcanization from the inside. For example, in the rim embedded valves in the vulcanizing bowl with superheated steam inside Tire and rim generated interior can be pumped. As in a conventional vulcanizing device Tires don't just look like the outside Vulcanization trough, but also from the inside like with a conventional vulcanizing bellows from Heated inside. After vulcanization, this can be hot Fluid can also escape through the rim or be sucked out will.

The rim is preferred in its radially outer surface area with support material for the production of an emergency tread educated. Thus, emergency running properties are also inside pressure loss can be guaranteed.

The method for producing a vehicle tire according to the Features of claim 17 enables the advantages of proven structure of the individual carcass plies on one drum-like body with flat axially tensioned layers arrangement without the by removing the built torus from Body, intermediate storage, transport before and after Vulcanization and disassembly related concentricity problems and Deformations also with vehicle wheels with radially inside axially supported concentric core rings.

The use of a rim of a vehicle wheel both as Carrier of tire building material during tire building as also as a carrier of the fully vulcanized tire in operation Condition of the vehicle wheel enables the tried and tested tires construction on a drum-like body in centered State and while maintaining the centered state until Operation on the vehicle.  

The rim is also preferred as a sealing chamber element when building up the internal pressure in the tire at Vulcanization used. Additional sealing walls for the Vulcanization can be omitted. Tires and rims serve themselves as a bladder, which makes vulcanizing easier device can be used.

The invention is explained in more detail below on the basis of the exemplary embodiments illustrated in FIGS. 1 to 9. Show here

Fig. 1 shows schematically the inventive production launch of a vehicle wheel with a conventional carcass plies,

Fig. 2 vulcanization of vehicle wheel produced,

Fig. 3 mounting the vehicle wheel on a rim dish,

Fig. 4 Preparation of an inventive vehicle wheel with generation of the carcass by winding round,

Figure 5 Preparation beads according to the invention. A vehicle wheel with radially inside of the rim axially fixed core,

Fig. 6 cross-sectional view of a rim according to the invention, and

Fig. 7 cross-sectional view of a rim according to the invention with embedded support material to improve the emergency running properties.

Fig. 8 Preparation according to the invention shown in FIG. 1 with flange-shaped rim

Fig. 9 sealing arrangement in the rim.

In Fig. 1, the construction of a vehicle wheel according to the invention in a sectional plane that includes the tire axis is shown schematically. The tire axis is shown schematically in FIG. 1a with a broken line. As can be seen in Fig. 1a, an annular rim 2 , consisting of concentric axially arranged one behind the other, in centered contact with each other rim elements 3 , 4 and 5 , on a clamping head with concentric radially arranged inside the rim 2 , distributed over the circumference Clamping head elements 10 pushed axially. The clamping head elements 10 are moved radially outward in accordance with the arrow direction shown in FIG. 1a until they touch the rim 2 from the inside of the rim and thus clamp the rim 2 concentrically to the desired tire axis. Following this, an inner layer 6, which extends over the circumference of the rim 2 and extends axially beyond the axial rim ends of the rim elements 3 and 5, is placed in a known manner and the inner layer ends which extend axially beyond the axial rim ends are folded around the rim radially inward in accordance with the arrow representation.

As shown in FIG. 1b, one or, as is not shown, a number of carcass layers 7 , which extend over the circumference of the rim and extend axially beyond the rim ends, are then placed on top. The end regions of the carcass layer 7 which extend beyond the axial ends of the rim 2 are subsequently folded radially inwards, according to the arrow representation of FIG. 1b, around the rim. According to the illustration of FIG. 1c is in the axially outer portion of the rim radially above the rim to the carcass layer are each a is reaching over the circumference of the rim and away axially extending over the respective rim end side strips 8 a and b are laid 8 and thereafter with its axial end region extending over the respective rim end, in accordance with the arrow representation of FIG. 1c, folded radially inwards around the rim. Subsequently, the clamping head is loosened by radial contraction of the individual clamping head elements 10 from the rim and the rim 2 with the strip on it from the inner layer 6 , carcass layer 7 and side 8 a, 8 b formed sub-package 9 axially removed from the clamping head.

In a further method step, as shown in FIG. 1d, the middle rim element 4 , which consists of individual adjacent rim element segments arranged distributed over the circumference, is removed one after the other by pulling out the individual rim elements 4 .

As shown in Fig. 6, the individual rim elements 3 , 4 and 5 are each formed with corresponding conical holding surfaces 37 , 38 , 39 , 40 , each of which is at an angle α between 2 and 12 degrees, preferably 5 degrees . In the conical surface 40 of the rim element 5 , a circumferential groove 48 with an inserted O-ring, which for simplification is not shown in FIG. 1, 49 is formed. The individual segments of the rim element 4 can be tilted from their rim position by a slight tilting movement - corresponding to the movement arrow of FIG. 1d - and then pulled radially inwards - according to the movement arrow of FIG. 1d. The remaining rim elements 3 and 5 with the sub-package 9 resting on them are pushed axially onto concentric bearing blocks 11 a, 11 b of FIG. 1e. The concentric bearing blocks 11 a, 11 b, like the bearing block 10, have radially movable clamping head elements 11 a, 11 b distributed over the circumference. By radially moving these clamping head elements outwards, the rim elements 3 and 5 are clamped concentrically. It is also conceivable not to push the concentric rim elements 3 and 5 with the sub-assembly 9 axially onto the pedestals 11 a, 11 b, but rather the concentric pedestals 11 a, 11 b each axially from the outside according to the arrow representation of FIG. 1e to insert elements 3 and 5 into the rim radially inside the rim in order to then clamp the rim elements 3 and 5 by radial movement of the pedestals.

To maintain the centered arrangement more securely, it is also conceivable, if necessary, to clamp the rim elements 3 and 5 through the bearing blocks 11 a and 11 b before the removal of the rim elements 4 .

The bearing blocks 11 a, 11 b are then moved axially inward concentrically towards each other until the rim elements 3 and 5 arrive in a rotationally and sliding-fixed connection. The conical surfaces 37 of Fig. 6 allow a centered fixed connection by frictional contact. In addition, if necessary, the connection can be secured axially by known securing means, not shown, distributed over the circumference, for example by screwing, against axial loosening. The O-ring 49 effects a seal between the conical holding surfaces 40 and 37 .

Between above the rim elements befindlichem substructure package 9 and the rim elements is blown 3 and 5, pressurized air through through holes in the rim element 5 or in the rim element 3 or in two rim elements 3 and 5. FIG. For this purpose, conventional compressed air units, for example via one or more hose connections, not shown, and, if necessary, with valves screwed into the bores can be carried out. Due to the increase in the internal pressure, the base package 9 rises into a toroidal shape, as shown in FIG. 1f. When collecting the radially outer area of the toroidal shape with the treadmill package 12 , which had already been prefabricated in a conventional manner, consisting of a first belt layer 13 , a second belt layer 14 , a bandage 15 , a tread base 16 and a tread 17 , which are concentrically known Has been pushed axially over the base 9 - connected. The axially projecting areas of the treadmill package 12 are pressed radially downward onto the base package 9 in a known manner.

After removing the compressed air connection and after venting the interior of the tire, it is conceivable, if necessary, to further improve the sealing effect, as shown in FIG. 1g, over the circumference of the rim 2 radially within the rim 2 at least in the connection area of the rim elements 3 and 5 to place axially extending rubber strips 19 . For all-round sealing, it is also conceivable to extend the rubber sealing strip 19 , as shown in FIG. 1g, over the entire resulting gap area formed between the respective axial ends of the base package 9 . To increase the axial cohesion of the rim, the rubber sealing strip can be formed with reinforcements.

The vehicle wheel blank formed in this way from rim 2 , sub-package 9 , treadmill package 12 and, if necessary, with rubber sealing strips 19 is then, as shown in FIG. 2, in a conventional vulcanization press 20 - consisting of the vulcanizing mold side parts 21 and 22 , which are moved axially laterally to the vehicle wheel blank 18 in a known manner, and the known centripetal movable profile segments 23 , 28 of the vulcanizing mold 20 which are distributed over the circumference and which act on the tread of the tire and which produce the tread pattern in a known manner. Through one or more openings 25 in the rim 2 , superheated steam 24 is pressed into the torus of the vehicle wheel blank 18 via one or more connecting hoses 24 . The resulting internal pressure in the torus provides for the last elevation of the rubber material desired in the vulcanization process, which ensures that the tire material, especially in the tread area, is pressed securely into the shape of the tread segments 23 and the desired tire tread pattern is reliably mapped. The heated shape, as well as the increased temperature in the vehicle wheel ensure an even vulcanization by heat from outside and from inside the vehicle wheel. If the rubber sealing strip 19 is not formed over the entire axial free space between the axial ends of the base package, the rim 2 sealed by the O-ring 49 also serves as a sealing chamber wall during vulcanization.

It is conceivable to provide the bores 25 with a thread so that a corresponding hose coupling can be screwed in easily and securely from the connecting hose 24 . The connection openings 25 expediently correspond at least partially to those for producing the bombage of FIG. 1f.

After the vulcanization of the tire is carried Offn the Vulkanisierformseitenteile 21, 22 and the movable centripetally profile segments 23, on the other drive removed from the vulcanization press 20th The vehicle wheel removed from the vulcanization press 20 has a vehicle tire fully mounted on the rim 2 . The adhesion between rubber and metal was achieved in a known manner by means of adhesives which were applied to the radial inner rim of the rim prior to assembly during vulcanization.

Fig. 9 shows a finished vehicle wheel 1 with mounted on rim 2 without any additional tire rubber tire 19th The O-ring 49 seals the rim and thus the interior of the tire against loss of compressed air.

The vehicle wheel can be fastened according to individual wishes immediately or at a later time centered on a correspondingly designed rim bowl. For example, it is conceivable, as shown in Fig. 3a, that threaded bolts 26 are screwed sealingly into threaded bores 2 formed equidistantly over the circumference of the rim. The threaded bolts 26 have a stop bolt 27 a which is adjustable with respect to their axial alignment and can be fixed in an axial position suitable for centering. As shown in Fig. 3a and b, concentrically to the vehicle wheel corresponding ring flanges 29 and 30 are axially arranged on both sides of the bearing bolts and axially screwed. The threaded bolts 26 are firmly clamped between the ring flanges 29 and 30 . The ring flanges have half-cylinder-shaped depressions which correspond to the cylindrical shape of the bearing pin 26 and which receive the bearing pins 26 before being braced. This fixes the ring flanges in the circumferential direction. The spacers 32 and nuts 31 , which are screwed radially inside the flange rings onto the bearing bolt, are used to radially fix the flanges 29 and 30 . It is conceivable to additionally clamp spacer rings 28 between stop 27 and flange rings 29 , 30 . It is also conceivable to arrange spring assemblies, for example disc springs, in this area to increase the preload. As shown in FIGS . 3a and 3b, the flange ring 30 is fixed concentrically to a rim bowl 33 . After vulcanization, only centering between solid, easily centerable parts takes place between the tire and the rim disk 33 .

The threaded bolts 26 have a stop bolt 27 which is adjustable in its axial direction and can be fixed in an axial position suitable for centering the rim on the rim disk. As shown in Fig. 3a and b, concentric to the vehicle wheel ring flanges 29 and 30 are arranged axially on both sides of the bearing pin and centered, for example by screwing.

It is also conceivable to place the rim on the rim bowl acoustically and mechanically, for example, can be decoupled from the Example by known vibrating metal compounds attach to a transmission of vibrations between Reduce tires and chassis.

Instead of building the tire according to the method of FIG. 1, it is conceivable to apply the carcass 7 to the rim by wrapping it all around. Such a tire structure is shown in Fig. 4. After completion of the rim, an inner layer is first placed in a known manner and the ends extending axially beyond the rim ends are folded down radially and the clamping head 10 is removed before the rim with a circumferential carcass thread 34 , in a known manner shown in FIG. 4b is wound. For this purpose, the rim 2 is mounted in a type of three-point bearing between the bearing disks 52 and 53 and a bearing band 54 , which is guided around the deflection rollers 55 , 57 and a drive roller 58, and is guided axially between guide rollers 60 . A wrap ring 51 is then constructed around the cross-section of the rim of FIG. 4a, as shown in FIG. 4b. The winding ring 51 is rotatably supported between bearing disks 61 about the cross section of the rim. A coil 56 with a carcass thread 34 is fastened to the winding ring 51 in a known manner. The winding ring 51 is rotated in a known manner with a constant direction of rotation around the cross section of the rim. With the help of the drive roller 58 driven by the drive motor 59 , the rim 2 is slowly rotated about its axis by the bearing band 54 at a speed which is precisely matched to the rotational speed of the winding ring 51 . Due to the rotational movement of the winding ring 51 and the rim 2 , the carcass thread 34 is wound spirally around the rim 2 with a precisely adjusted step size. In this way, one or more layers of carcass can be wound one on top of the other. By changing the direction of rotation of the rim 2 or of the winding ring 51 , cruciform arrangements of the carcass threads of different carcass plies in relation to one another are possible.

As shown in Fig. 4c, thereafter as in the embodiment of FIG. 1c, the side portions 8 a and 8 b placed and folded inwardly about the axially outer rim in the area radially. Before placing the side strips 8 a and 8 b, the rim is again concentrically clamped onto the bearing block 10 . The bearing block is then removed again.

The carcass 7 is cut in a known manner in the middle of its axial extent radially below the rim over the circumference and its ends are folded axially outwards. It is also conceivable to cut out and remove a carcass strip extending over the circumference of the rim in the axially inner region radially inside the rim in the region of the cut.

In Figs. 4d and 4e it is shown how, 11 are clamped b according to the method of Fig. 1, thereafter the axially inner rim members 4 removed, and the outer rim elements 3 and 5 on bearing blocks 11 a and. The bearing blocks 11 a and 11 b are moved axially towards one another as in the method of FIG. 1 and the rim elements 3 and 5 are axially connected to one another in this way. The bombing and the connection to the treadmill package takes place, as shown in FIG. 4f, as in the construction of FIG. 1. Between the axial end regions of the sub-package 9 radially below the rim 2 , a rubber sealing strip 19 can also be placed for a more secure seal in the rim region , which extends over the circumference of the rim and connects the two end regions. It is also conceivable, after the carcass has been cut open, to fold the axially folded carcass ends axially inward again and to connect them to one another.

According to the method according to the invention, a vehicle tire without a bead core can be produced in this way, thereby avoiding problems which are produced by the manufacture and assembly of the bead cores. However, the construction of the tire according to the invention is also possible for the production of vehicle wheels with bead cores. Fig. 5 shows the construction of a vehicle tire with radially arranged within the rim bead cores. The structure of the inner layer 6 and carcass layer 7 according to FIG. 5 corresponds to the embodiment of the method of FIG. 1. As shown in Fig. Sb is shown to be subsequently axially from the outside annular bead cores 36 a, 36 b of a known type radially inside the Rim inserted into this. The carcass ends 7 are folded around the cores 36 a, 36 b. This is followed, as in the embodiment of Fig. 1, the construction of the side strips 8 a, 8 b. This is shown in Fig. 5c. The further construction by retracting clamping heads 11 a, 11 b, axially connecting the rim elements 3 , 5 , producing the tire torus shape by bombing and connecting to the treadmill package 12 corresponds, as shown in FIG. 5 d, to that of the method of FIG. 1. In such a vehicle wheel, the rubber material is axially secured on the rim via the core beads, which are axially supported on limits 35 a, b of the rim, additional adhesives can be omitted.

Fig. 8 shows a manufacturing method according to the manufacturing steps of Fig. 1 with an alternative design of the rim. As shown in FIGS. 8a to 8c, the base package 9 is built on an annular rim 2 , which is formed from the rim elements 3 , 44 and 5 . The rim elements 3 and 5 are not conically tapered on their axially inward-facing side as in the rim of FIG. 1, but rather are each formed into a correspondingly designed rim flange. In the rim flange of the rim element 5 , an annular groove 50 is formed axially inward, in which an O-ring 49 is inserted. For the construction according to the construction steps of Fig. 8a is the rim member 3 with its axially inward-directed flange surface in touching contact with the rim member 44 and rim member 44 communicates with its axial at its end face in touching contact with the inside facing axial face of the flange of the rim element 5 . The rim elements 3 , 44 and 5 form a cylindrical rim surface with their radially outer surface. To build up according to the steps from 8 a to 8 c, the rim elements 3 and 5 are clamped concentrically on clamping heads 45 a and 45 b. After the substructure 9 has been built up, the clamping heads 45 a and 45 b and subsequently the middle rim element 44 are removed, as is shown schematically in FIG. 8d.

As is shown in FIGS. 8e to 8g, the further method corresponds to the method steps described for FIGS. 1e to 1g.

It is conceivable, as shown in FIG. 8f, to slightly move the rim elements 3 and 5 apart to raise the sub-assembly 9 , so that a narrow gap is formed between the rim elements 3 and 5 , through which compressed air is fed inwards. As shown in Fig. 8g, the rim elements 3 and 5 are axially brought together again after completion of the green tire and screwed together with their axially inward flanges by screws 47 . The O-ring 49 seals the rim 2 between the rim elements 3 and 5 .

It is also conceivable to generate the elevation of the substructure by blowing compressed air into the interior between substructure package 9 and rim elements 3 and 5 through bores in the rim elements, as in the method of FIG. 1 as shown in FIG. 1f.

The vulcanization is carried out as described for FIG. 2. It is also conceivable to use a conventional bladder that is inserted into the interior of the tire between the rim elements 3 and 5 when the flange connection is screwed on between the axially separated rim elements 3 and 5 . After vulcanization and after removing the bladder, the rim elements 3 and 5 can be axially moved towards each other again and screwed together in a sealing manner by the sealing action of the O-ring 49 .

The rim according to FIG. 8 can also be attached to a rim bowl 33 , for example, as described for FIG. 3.

It is also conceivable to screw the rim bowl 33 directly onto the radially inward flanges of the rim elements 3 and 5 .

It is conceivable to construct the rim 2 instead of three axially adjacent rim elements from more than three axially adjacent rim elements, from which one or more axial rim elements which are not rim elements are removed after the sub-assembly package 9 has been built up.

It is also conceivable to design such removable rim elements, as exemplified in FIG. 5, as parts of a conventional tire building drum. The fold-out elements 4 of the tire building drum are adapted in shape to the other rim elements. Using the example of FIG. 5, they must allow a certain tilting movement for their removal.

As shown in FIG. 6, it is conceivable to design the radially outer surfaces 41 of the rim elements 3 and 5 as smooth cylindrical support surfaces. It is also conceivable to cover the cylindrical support surfaces with additional support material. In the embodiment of Fig. 7, the rim elements 3 and 5 are formed in their axial edge region radially outwardly curved like a horn. Between the horns 42 a and 42 b, the trough-shaped depressions formed thereby are filled with support material 43 . The surface of the support material 43 forms a cylindrical emergency running surface 41 . The support material is made of hard plastic, rubber or plastic foam, which is insensitive to shocks for damping and has good sliding properties for emergency running. The flat cylindrical surface of the rim elements 3 , 4 , 5 enables particularly secure support of the inner layer and carcass material during the laying-on process of the rubber layers and during the subsequent transfer.

For the rim elements that remain permanently in the rim the flat cylindrical surface enables additional security Emergency running properties through a gentle, safe Support surface for the lowered rubber areas of the Tires when there is a loss of air pressure during operation.  

That made possible by the vehicle wheel construction according to the invention Use of rim bowls with particularly large rims diameter allows more space inside the rim, at desired independent wheel drive also larger powerful Electric motors can be used.

Reference list

1 vehicle wheel
2 rim
3 rim elements
4 rim elements
5 rim elements
6 inner layer
7 carcass ply
8 side stripes
9 base package
10 clamping head elements
11 a clamping heads
11 b clamping heads
12 treadmill package
13 Belt layer
14 Belt layer
15 bandage
16 tread substructure
17 treads
18 Vehicle wheel blank
19 rubber strips
20 vulcanization press
21 vulcanizing mold side parts
22 vulcanizing mold side parts
23 profile segment
24 connecting hose
25 opening
26 threaded bolts
27 stop
28 spacer rings
29 ring flanges
30 flange ring
31 mother
32 spacer ring
33 rim wrenches
34 carcass thread
35 axial limitation
36 cores
37 conical holding surfaces
38 conical holding surfaces
39 conical holding surfaces
40 conical holding surfaces
41 outer surfaces
42 a horn
42 b horn
43 support material
44 rim element
45 a clamping head
45 b clamping head
46 -
47 screw connection
48 circumferential groove
49 O-ring
50 ring groove
51 wrapping ring
52 bearing washer
53 bearing washer
54 bearing belt
55 pulley
56 pulley
57 pulley
58 drive roller
59 drive motor
60 leadership role
61 bearing washers

Claims (19)

1. Vehicle wheel according to patent application P 44 46 234.4 consisting of a rim and a pneumatic vehicle tire,

• - with the tire mounted on the rim before vulcanization,
• - The rim of the rim is variable before vulcanization,
• - With sealants arranged in the rim.

2. Vehicle wheel with the features of claim 1,

• with a multi-part rim in the axial direction,
• at least one axial rim element is designed to be removable from the rim arrangement,
• - And the other rim elements are axially collapsible.

3. Vehicle wheel according to the features of claim 2,

• - With support surface areas in the radially outer surface of the rim for the emergency running of the tire.

4. Vehicle wheel according to the features of claim 2,

• - Wherein a removable from the rim axial rim element is designed as a tire drum.

5. vehicle wheel according to the features of claim 2,

• - Wherein sealing means are formed in at least one of the rim elements which can be moved together.

6. Method for producing a vehicle wheel according to patent application P 44 46 234.4,

• - Tire building material is built up on a rim before vulcanization, and the rim is then reduced in its axial extent and thereby sealed.

7. A method of manufacturing a vehicle wheel according to the features of claim 6.

• - Tire construction material built radially outside the rim after the reduction of the rim prior to vulcanization is raised radially to produce a tire toroid shape.

8. A method for producing a vehicle wheel according to the features of claim 6,

• - The axial reduction of the rim by removing at least one axial element of the rim and then axially moving the remaining rim elements.

9. A method for producing a vehicle wheel according to the features of claim 7,

• - Wherein after axially shrinking the rim on the radial inside at least one sealing rubber layer is applied at least over joints of the collapsed rim elements.

10. A method for producing a vehicle wheel according to the features of claim 6,

• - Wherein after shrinking the rim on the radial inner side of the rim an axially extending over the entire rim area closed rubber layer is generated.

11. A method for producing a vehicle tire according to the features of claim 6,

• - Before the axial reduction of the rim, first radially above the rim, extending over its circumference and over the entire axial extension area of the rim and extending over the axial end areas, a tire inner layer is placed and the end pieces reaching over the axial end areas of the rim radially inward around the rim be folded down
• - Subsequently, carcass material is placed radially above the inner layer such that it extends over the circumference of the rim and in the axial direction over the ends of the rim, and the carcass ends extending beyond the ends of the rim around the rim ends radially inward around the Rim folded down,
• - then side strip material is placed over the circumference of the rim radially above the carcass on the carcass and the axial regions of the side strips projecting beyond the axial rim ends are folded radially inward around the rim,
• - Then the rim is reduced axially and then the tire construction material placed radially outside the rim is raised by bombing and thereby brought into connection with a prepared concentric treadmill package, and
• - Then the built-up vehicle wheel is vulcanized.

12. A method for producing a vehicle tire according to the features of claim 6,

• -Where, before the axial reduction of the rim, first radially above the rim extends over its circumference and over the entire axial extent of the rim and extends over its axial end areas, a tire inner layer is placed and the end pieces reaching over the axial end areas of the rim radially inward around the rim be folded down
• - then carcass material is placed on the rim torus by wrapping it around,
• - then side strip material is placed over the circumference of the rim radially above the carcass on the carcass and the axial regions of the side strips projecting beyond the axial rim ends are folded radially inward around the rim,
• - afterwards the carcass is circularly and concentrically separated radially inside the rim,
• - Then the rim is axially reduced and then the radially outside of the rim tire construction material is raised by bombing and thereby brought into connection with a prepared concentric treadmill package, and
• - Then the built-up vehicle wheel is vulcanized.

13. A method for producing a vehicle tire according to the features of claim 12,

• - After the end regions of the side strips have been folded over, the carcass is radially and concentrically separated radially inside the rim, and a strip of the carcass extending over the circumference of the carcass with an axial extent which is smaller than the amount of axial reduction of the rim in the region of axial separation is removed, and then the rim is axially reduced.

14. A method for producing a vehicle tire according to the features of claim 12 or 13,

• - After the axial reduction of the rim, the carcasses created by the separation of the carcass are sealed together.

15. A method for producing a vehicle tire according to the features of one or more of claims 6 to 14,

• - The interior of the tire is acted upon by the rim for vulcanization with fluid under internal pressure.

16. A method for producing a vehicle wheel according to the features of one or more of claims 6 to 15,

• - Wherein the rim is occupied with support material for producing an emergency running surface on its radially outer surface before being coated with tire building material.

17. A method for producing a vehicle tire according to the features of one or more of claims 6 to 16,

• - Wherein carcasses produced radially inside the rim end about axially supported concentric core rings inserted radially inside the rims are folded axially outwards before vulcanization.

18. Use of a rim of a vehicle pneumatic wheel both as Carrier of tire building material during tire building as well as the carrier of the finished vulcanized tire in the Operating condition of the vehicle wheel. 19. Use of a rim of a vehicle wheel according to Claim 17 additionally as a chamber element in the construction of the Internal pressure in the tire during vulcanization.