CN114728543A - Spare tire for automobile wheel - Google Patents

Abstract

The invention relates to a spare tire for a vehicle wheel, comprising a rim and a tire mounted on the rim, wherein the spare tire allows limited tire functionality when in use fastened to the vehicle wheel, wherein the spare tire is designed in multiple parts and comprises a plurality of wheel segments (16,17) each having a respective tread portion (18) forming a common tread, and the spare tire comprises a mounting portion (12) which in use can be fastened to the rim of the vehicle wheel and has at least three bracing arms (21) extending radially outwards from a common center (22), and at least one blocking jaw (31) is provided on each bracing arm (21), which blocking jaw can be actuated by means of an engagement element (26) of a clamping mechanism (24) for fastening the mounting portion (12) to the rim of the vehicle wheel, which clamping mechanism is positioned at the center (22) of the mounting portion (12), wherein, a connecting strip (28) with at least two claws (31) is arranged on at least two or each joint part (26), and the claws (31) can move in a translational way along the respective tensioning arm (21) along the joint part (26) through a clamping mechanism (24).

Description

Spare tire for automobile wheel

Technical Field

The invention relates to a spare tire for a vehicle wheel, comprising a rim and a tire mounted on the rim.

Background

WO 2019/141817 a1 discloses a spare tire for a vehicle wheel, comprising a rim and a tire mounted on the rim. This is called a temporary spare tire. The spare tire comprises an installation part including a plurality of clamping jaws, and when the installation part is installed on a rim, the clamping jaws are clamped on the rim curled edge. After the mounting portion is secured to the rim, the first tread portion of the tread is mounted on the mounting portion. Then, a second tread portion is fixed on the mounting portion to collectively form a tread. Subsequently, driving can be continued in the event of tire damage.

Disclosure of Invention

The object on which the invention is based is to provide a spare tire for a motor vehicle which meets the growing demands made of such spare tires.

The object on which the invention is based is achieved by a spare tire in which a web with two adjacent claws is arranged on at least two or each coupling part arranged relative to the tightening arms and at the same time the claws can be moved with the coupling part by means of the clamping mechanism in translation relative to the center along the respective tightening arm. A spare tire is thus provided, wherein two clamping jaws are arranged outside the direction of action of the tensioning arms, which clamping jaws are clamped onto the rim bead during mounting, and at least three webs, each having two or more clamping jaws, can be moved simultaneously by means of a clamping mechanism relative to the center of the mounting part, so that the mounting part can be clamped centrally relative to the rim. This improves the safety and secures the mounting portion to the rim in a simplified manner.

The jaws are preferably arranged and oriented with respect to the coupling part by the webs at the same mutual distance. In this way, forces can act laterally on the rim outside the tensioning arms. This allows for even force distribution for clamping the mounting portion to the rim in the case of three or more tensioning arms. The clamping jaws arranged adjacent to the tensioning arms are preferably oriented at an angle to one another on the web such that the clamping surfaces of the clamping jaws are oriented tangentially to the rim bead circumference or lie on the rim bead circumference. The longitudinal axes of the jaws preferably intersect at the centre of the clamping mechanism.

Furthermore, a support is preferably arranged between the two catches on the web, which support extends radially outward to rest against the outer side of the rim bead and preferably has a protective cover, in particular a rubber coating, which is directed at least to the mounting side. The support is preferably designed as a tab and rests on or against the outer side of the rim bead. The force effect caused by the claws and transmitted to the connecting strip can be resisted. In particular to prevent twisting. The arrangement of the two clamping jaws and the lug arranged therebetween results in a so-called three-edge clamping or three-point clamping between the clamping jaws and the support on the rim bead.

Another advantageous embodiment provides that the clamping jaw is arranged at an angle to the mounting side relative to the plane formed by the bracing arm. This arrangement allows the bracing arms to be arranged at a greater distance from the rim bead, so that a spare tire can also be mounted on such a rim, with the rim spokes protruding slightly with respect to the rim bead. The arrangement of the jaws relative to the plane of the tensioning arm is preferably realized in that a wedge is provided between the link and the respective jaw or between the guide on the tensioning arm and the link.

It is also preferably provided that the claws arranged on each link have at least one fastening element on their outer side and that the roller comprises at least two wheel segments with tread portions, and that at least one interface of the wheel segments between two claws arranged on a link can be arranged by a connection between a fastening element and the wheel segment. This allows a reliable arrangement and accommodation of the wheel section relative to the mounting. In this way, a wheel segment is clamped and held in each case by two claws arranged at a distance by a connecting strip, and an interface of the tread portion is provided between the two claws. This allows the interface to be maintained and the ends of the associated wheel segments to be aligned to form a common interface. The roller preferably consists of one wheel section with a circumference of 2/3 and another wheel section with a circumference of 1/3. Thereby forming two interfaces.

It is also preferred that a guide mechanism is provided between the connecting piece and the tensioning arm, by means of which guide mechanism the connecting piece can be guided in a translatory movement in a rotationally fixed manner relative to the tensioning arm of the mounting. The clamping movement is thereby initiated centrally for all webs by means of the clamping mechanism acting simultaneously on all the engagement elements, so that the mounting part can be clamped uniformly centrally to the rim. This "anti-rotation" ensures that the jaws snap simultaneously to the rim bead, thereby also simplifying the installation.

The guide means of preferred design between the bracing arm and the tie bar are formed, for example, by the bracing arm section and the tie bar section abutting against one another or engaging one another in a form-fitting manner. The clamping jaws, which are respectively oriented laterally adjacent to the tensioning arms and are received by the tie bars, are thereby held oriented in the same plane during actuation of the engagement elements, wherein this common plane is oriented parallel to the end face of the wheel rim on which the wheel segment is mounted. The guide mechanism also has the advantage that a moment support is provided when the clamping jaws are clamped on the rim bead of the rim. There is also moment support that maintains the orientation of the links relative to the spreader arms when the engagement members are actuated with respect to translational movement along the spreader arms.

A further preferred embodiment of the guide means for guiding the connecting piece in a rotationally fixed but translationally movable manner relative to the tensioning arm provides that the guide means comprise a U-shaped slider guided by the tensioning arm. In this case, it can be provided that the U-shaped slider is also guided in the tensioning arm. Alternatively, the U-shaped slider may wrap the tensioning arm on the outside. The bracing arm preferably also has a U-shaped profile, so that a rotation is prevented by the U-shaped slider and the U-shaped bracing arm and a translational movement is also possible while the orientation of the tie bars remains unchanged. The connecting strip is preferably fixed to a movable U-shaped slider. Advantageously, the engaging element engages on the movable U-shaped slider or on a connecting element on the U-shaped slider to control the movement.

A further preferred embodiment of the invention provides that the connecting link or the cover which can be placed on the bracing arm and preferably covers the joint has a radially outwardly pointing centering surface on which the wheel segments are articulated and preferably supported radially when mounted on the mounting part. Additional centering of the roller from the wheel section to the mounting can thereby be achieved, whereby a smoother running can be achieved.

The wheel segments are preferably provided with fastening tabs with slot-shaped recesses. These oblong recesses are advantageously oriented parallel to the center of the tensioning arm or mounting portion. On the one hand, this arrangement allows the fastening tabs to be constructed in a reinforced manner so as to thus allow greater forces to be taken up. On the other hand, the elongated hole-shaped recesses allow the mounting portion to be used with a variety of different rim sizes.

Advantageously, form-fitting elements are provided between the fastening tabs and the outer side faces of the jaws corresponding thereto, which form-fitting elements can be adjusted to different rim sizes and snap into engagement with one another or into engagement with one another. Furthermore, the form-fitting element can preferably be arranged on the outer side of the fastening tab and on the fastening means which engage with the fastening element of the catch. These form-fitting elements can also be formed on both sides of the fastening tab.

These form-fitting elements can be designed, for example, in the form of projections or recesses, for example, as grooves or the like. The form-fitting elements can also be designed as saw-tooth elements. The form-fitting element is preferably designed such that it can be switched from a radially outer form-fitting element to a radially inner form-fitting element when the blocking jaws are moved in translation towards the center of the mounting, so that simple adaptation to different rim sizes can be achieved, while still securing the spare tire to the vehicle rim by means of the blocking jaws. Preferably, a sliding layer may be provided between the form-fitting parts on one side or on both sides to allow easier clamping. The positive-fit elements are advantageously oriented in such a way that they can be moved toward the center of the mounting part in a latching manner, but snap back or engage with one another in opposite directions and release the movement when the spare tire is fixed to the vehicle rim. The form-fitting element can be oriented tangentially to the center of the mounting portion or curved relative thereto. This may allow further increasing the stresses for fixing the mounting portion on the rim and achieving a better orientation due to the form fit.

According to an alternative embodiment, it is preferably provided that at least two spaced-apart claws are provided on the link, which claws are held on the link so as to be longitudinally displaceable at least in the pulling direction of the link relative to the tensioning arm. This at least longitudinally movable arrangement can allow the jaws to be attached to the rim bead as the case may be.

Preferably, when the jaws are mounted on the link so as to be movable at least in the longitudinal direction, a positioning element, in particular a positioning pin, is provided on the link, which is inserted into an elongated hole in the jaws and guides the jaws. Alternatively, provision may be made for a positioning element, in particular a positioning pin, to be provided on the catch, which is inserted into an elongated hole in the link and can thus be guided at least in the longitudinal direction.

During the displacement movement between the blocking jaw and the connecting piece, the blocking jaw is advantageously actuated to perform a turning movement or a feed movement towards the rim bead. Advantageously, this can be done by means of a sliding groove or a sliding ramp which can be provided on the jaws and/or the connecting strip. This allows the jaws to be inserted more easily between the rim bead and the tire, especially if the tire has a snug friction edge above the rim bead. Thereby allowing easier installation of the wheel segments.

One of the two wheel segments preferably has a segment connecting part, which is formed by a plate-shaped segment on which a fastening pin is fixedly arranged, the fastening pin preferably being detachably connected to the one wheel segment. Next to the fixing pin, a further pin is provided on the plate-shaped section, onto which a further wheel section can be inserted. Such a segment connecting member allows to further improve the reliability of the same tread used for arranging the wheel segments forming the roller.

The object on which the invention is based is also achieved by a spare tire, wherein the wheel segments have a tread portion reinforced with a reinforcement liner to form a tread. Treads comprised of a resilient plastic material, preferably a polyurethane or polyester urethane rubber having a shore a hardness of greater than 80, may be reinforced with a reinforcing liner, thereby allowing improved traction, improved heat dissipation and extended service life. When the tread consisting of an elastic plastic is vulcanized onto the wheel section, the reinforcing liner can preferably be added vulcanized. Alternatively, the tread with the reinforcing liner may be manufactured separately and then fixed relative to the wheel segments by a plug connection and/or a clamp connection or the like. The reinforcement liner may be formed of metal fabric and/or metal filaments and/or strands.

The object on which the invention is based is also achieved by a spare tire, wherein each interface of a wheel segment has a closure means by means of which tread portions of the wheel segment that adjoin one another can be connected to one another in a form-fitting and/or force-fitting manner.

This prevents the interface from wearing out more.

The closure means for forming a closure at the interface between the two wheel segments preferably consist of two complementary closure parts which can be connected to one another by means of insertion, nesting, clamping, engagement or locking when one wheel segment is mounted relative to the other wheel segment. This allows a simple mounting of one additional wheel part relative to the other wheel part, while at the same time a force-fitting and/or form-fitting closure can be provided at the interfaces of the wheel parts. Advantageously, the closure portions snap back in succession in the circumferential direction of the tread of the wheel section. Thereby providing an improved connection at the interface of the tread.

Another preferred design provides that each closure of the detachable closure mechanism is firmly connected to a reinforcement lining in the tread at the interface of the wheel section. Thus, after the wheel segments are mounted to form a roller with a complete tread, despite the interface, an approximately annular reinforcing liner is formed by the closure mechanism. This allows for reduced wear and increased strength and improved heat dissipation. The reinforcing inserts in the tread may consist of round or square wire and/or strand cross-sections.

Furthermore, in or adjacent to the interface, the tread portion of the wheel section preferably has a thickening radially directed towards the center of the mounting portion. The thickening allows the formation and/or incorporation of a closure mechanism in a tread portion having sufficiently large dimensions. The cross section of the wheel section is preferably reduced at the interface, i.e. the tread cross section is correspondingly increased. The fastening of the reinforcing liner to the closure element can thus be designed more reliably.

Advantageously, the thickening of the interface of the tread portion is designed to be arc-segment-shaped or hollow-groove-shaped as seen in the circumferential direction of the tread portion, and the deepest point of the thickening with respect to the center of the mounting portion is preferably located within the interface. A stable design of the interface can thereby be maintained.

Drawings

The invention and further advantageous embodiments and improvements are described and explained in more detail below with reference to the examples shown in the drawings. The features mentioned in the description and the drawings can be used in accordance with the invention itself, either individually or in any combination of a plurality of them, wherein:

figure 1 shows a schematic view of the front face of a spare tire,

figure 2 shows a schematic view of the back of a spare tire,

figure 3 shows a schematic view from above of the spare tire according to figure 1,

figure 4 shows a schematic cross-sectional view along the line a-a in figure 1,

figure 5 shows a schematic view of a segment connection of two wheel segments,

figure 6 shows a schematic side view of the segment connection according to figure 5,

figure 7 is a perspective view of a cap with an end side centering surface,

figure 8 shows a schematic cross-sectional view of a wheel segment,

figure 9 shows a schematic side view of a jaw,

figure 10 shows a schematic view from above of the jaw according to figure 9,

figure 11 shows a schematic view in partial cross section of the interface of two wheel segments,

figure 12 shows a schematic longitudinal section through the interface according to figure 11,

figure 13 is a perspective view of an alternative embodiment of the spare tire of figure 1,

figure 14 is a perspective view of the tightening arm of the spare tire according to figure 13,

figure 15 shows a schematic side view from the front of an alternative design of the interface between the two wheel segments of figure 11,

figure 16 shows a schematic rear view of the embodiment according to figure 11,

figure 17 shows a perspective view of a fastening tab for receiving a pawl,

figure 18 shows a schematic side view of the fastening tab at the beginning of the mounting portion on the rim,

figure 19 shows a schematic side view of the fastening tab according to figure 17,

figure 20 shows a perspective view of a tensioner arm having another alternative embodiment of a mounting portion,

figure 21 shows a rear perspective view of the tensioner arm according to figure 20,

figure 22 shows a schematic view of the tensioner arm according to figure 20 from below,

figure 23 shows a perspective view of a tensioner arm in accordance with an alternative embodiment,

figure 24 shows a schematic side view of an embodiment of the tensioning arm according to figure 23,

figure 25 shows a perspective view of another embodiment of a tie strip with jaws,

figure 26 shows a schematic side view of the tie strip according to figure 25,

figure 27 shows a schematic view of an alternative embodiment of the tensioner arm snapped onto the rim flange,

figure 28 is a side view schematic of figure 27,

figure 29 shows a schematic cross-section of the initial position of the movable jaw on the link,

fig. 30 shows a schematic sectional view of the final position of the movable jaw relative to the connecting strip.

Detailed Description

Fig. 1 shows a schematic view of a spare tire 11 as seen from the front. Fig. 2 shows a rear view and fig. 3 shows a view from above towards the spare tire 11.

The spare tire 11 includes a mounting portion 12 to which a roller 14 may be fixed to form the spare tire 11 together with the mounting portion 12. The roller 14 comprises, for example, two wheel segments 16,17, each having a respective tread portion 18. After the wheel sections 16,17 are mounted on the mounting portion 12, the tread portions 18 form a common, complete tread.

The mounting portion 12 includes three tightening arms 21. Alternatively, more tensioning arms 21 may be formed. These tensioning arms 21 extend radially outwards, for example from the same centre 22. The bracing arms 21 are preferably equally spaced from one another, viewed in the circumferential direction. The clamping mechanism 24 is preferably disposed at the center 22 of the mounting portion 12. The clamping mechanism 24 includes an engagement member 26 that is preferably oriented parallel to each of the tensioning arms 21. The coupling elements 26 are preferably designed as threaded spindles and have a drive in the region of the center 12, so that all coupling elements 26 are driven simultaneously. For example, a bevel gear mechanism can be provided, so that all the engagement elements 26 are simultaneously set in rotation by a driving rotary motion at the clamping mechanism 24.

One connecting strip 28 each is arranged at the radially outer end of at least two or more or all of the bracing arms 21. The connecting strip 28 is in connection with the engaging member 26. Thus, the links 28 can be controlled to move translationally inward or outward along the tightening arms 21. If no tie-rod 28 is provided on one of the tensioning arms 21, the catch 31 is connected to the coupling piece 26. The arms 21 are preferably oriented with the tie bars 28 relative to the interface 19 of the tread portion 18. The bracing arm 21 can be snapped between the interfaces 19 with the catches 31, i.e. without the tie-bars 28.

The links 28 each receive a pawl 31 laterally spaced from the tensioner arm 21. Such a clamping jaw 31 is designed as a clamping mechanism which can be clamped on the outer side of the rim bead and which embraces the rim bead. Two claws 31 are preferably arranged on the web 28. The claws 31 are also arranged on the connecting strip 28 at equal distances from the respective tensioning arm 21. The jaws 31 are oriented in such a way as to be aligned with the outer peripheral surface of the rim. Thus, when all the claws 31 are simultaneously engaged with the rim bead of the rim by the clamp mechanism 24, the mounting portion 12 can be centered and fixed with respect to the rim of the automobile wheel.

The catch 31 is designed in the shape of a hook and has a free end directed towards the centre 22 of the mounting portion 12 to catch on the peripheral edge of the rim bead.

The respective jaws 31 each have a fastening element 32 pointing towards the outer side of the mounting portion 12. The fastening elements 32 can be designed, for example, as bolts. In order to fix the wheel segments 16,17 on the mounting 12, each wheel segment 16,17 has a plurality of fastening tabs 34, which are each fixedly arranged on the wheel segment 16. The fastening tab 34 advantageously has an elongate recess 35. These fastening tabs 34 with elongated recesses 35 are oriented in pairs with one another and their spacing is adapted to the spacing of the claws 31 arranged on the connecting strip 28. Furthermore, the elongate recesses 35 of the fastening tabs 34 are oriented parallel to one another. After the wheel segments 16 are snapped onto the fasteners 32 by means of the fastening tabs 34, the recesses preferably extend parallel to the respective bracing arms 21. This arrangement allows the mounting portion 12 to be used to receive wheel sections 16 for different rim diameters.

After the wheel sections 16,17 have been seated and the fastening tabs 34 positioned on the fasteners 32, for example, fastening nuts are added to the fasteners 32 to fix the wheel sections 16,17 relative to the mounting portion 12.

The roller 14 preferably includes one wheel section 16 having a circumference of 2/3 and another wheel section 17 having a circumference of 1/3. Or may be halved. For example two, three or more jaws 31 may be provided on the wheel sections 16, 17. Two interfaces 19 are thus formed, through which the tread is broken. The wheel segments 16,17 are preferably arranged and oriented in such a way that the respective interface 19 is located between two claws 31, which claws may be arranged on the same link 28, but may also be adjacent claws 31 of two different links 28 (which applies to one connection point when halving). A further increase in safety is thereby achieved, since the two claws 31, which are fixedly attached to the connecting strip 28, clamp the wheel sections 16,17 toward one another in the region of the connection 19.

Fig. 4 shows a schematic cross-sectional view along the line a-a in fig. 1. The connecting strip 28 has a guide 38, which is designed, for example, as a rectangular recess. The rectangular recess as the guide 38 may grip a portion of the tightening arm 21 to prevent the link 28 from rotating relative to the tightening arm 21. The connecting webs 28 can be designed such that the mounting on a rim with outwardly protruding spokes is easily achieved, since the engagement elements 26 are axially offset outwardly with respect to the locking claws 31. In the central region of the connecting piece 28, for example, an internal thread 39 is provided, with which the coupling element 26 engages in order to achieve a translational movement of the connecting piece 28. A portion of a jaw 31 is shown at the respective outer end of the tie-strip 28. Furthermore, wheel segments 16,17 are shown with respective tread portions 18.

Fig. 5 shows a schematic illustration of a segment connection 41, and fig. 6 shows a schematic illustration of a side view of a segment connection 41 for two adjoining wheel segments 16, 17. The segment connection 41 has a plate-shaped segment 42, to which a first pin 44 is fastened. It may be a steel pin, for example. It can be inserted into an opening in the wheel section 16 and secured thereto by a stop collar 45. A further pin or peg 47 is provided on the plate-like section 42 adjacent to the peg 44. The through hole in the roller 17 may engage the pin 47 when the wheel segment 17 is positioned relative to the wheel segment 16. A stop element 48 (for example a spring ring, which is initially compressed when the second wheel section 17 is installed and is released and remains connected at the end of the installation process) can then also be inserted into the annular groove of the pin 47. By means of such a segment connection 41, the two wheel segments 16,17 can be additionally fixed in the radial direction at the connection 19.

The cover 51 is shown in perspective view in fig. 7. The cover 51 may be oriented relative to the guide mechanism 38 according to fig. 4. The cover 51 may also be arranged on an end face of the connecting strip 28. The cover 51 has a guide surface 52 on the end side. The guide surfaces 52 may be used to center the wheel segments 16,17 after being positioned on the fasteners 32 by the fastening tabs 34.

Fig. 8 shows a partial schematic view of the wheel segments 16,17 or the fastening tabs 34. Fig. 9 shows a side view of a jaw 31 with a fastener 32. Fig. 10 shows a top view. The fastening tab 34 and the catch 31 each have form-fitting parts 54,55 which are designed to be complementarily shaped and to snap into or engage with one another. For example, a groove-shaped recess 54 is provided, into which a projecting groove 55 is inserted. For example, a groove 55 can be provided on the outer side of the catch 31 and a groove-shaped recess 54 on the fastening tab. The form-fitting element 55 can be designed in a zigzag or wedge-shaped manner. This also increases the radial clamping with different rim diameters.

In fig. 11, the interface 19 of the two wheel segments 16,17 is shown in a perspective view. Fig. 12 shows a longitudinal section of the interface 19. The tread portion 18 is made of a resilient plastic material, in particular a polyurethane or polyester urethane rubber having a shore a hardness of greater than 80. Preferably, a reinforcing liner 58 is disposed in the tread portion 18. The reinforcement liner 58 may be a wire, braid, knit, or the like, whereby a higher load bearing capacity of the tread portion 34 can be achieved. The reinforcing liner 58 may be vulcanized into the tread portion 18.

In order to reduce wear at the interface 19 of the two adjoining tread portions 18 of the wheel segments 16,17, a closure mechanism 61 may be provided. The closure 61 preferably has two closure portions 62, 63. The closure portions 62,63 may be integrated or vulcanized into the tread portion 18. The closure portions 62,63 snap or hook behind one another to form the closed interface 19. Advantageously, each closing portion 62,63 can receive one end of a reinforcing liner 58. This interface 19 can thereby be closed again by the closing means 61, so that an approximately annular reinforcing lining 58 is obtained in the wheel segments 16, 17.

Fig. 13 shows a perspective view of the rear side of the spare tire 11 according to the alternative embodiment with respect to fig. 1 and 2. Fig. 14 shows an enlarged perspective view of the tightening arm 21 of the spare tire 11 according to fig. 13. In this embodiment of the spare tire 13, the guide means 38 is located between the tightening arm 21 and the connecting strip 28 and is designed differently from the embodiment according to fig. 1 and 2. In other respects, reference may be made to the embodiment of spare tire 11 described above.

The tightening arm 21 has, for example, a U-shaped cross section. Inside the U-shaped cross-section, the engagement member 28 is guided. The web 28 is designed with a U-shaped web portion 29 which receives centrally an internal thread 39 for connection to the coupling element 26. The U-shaped tie portion 28 is guided laterally outwardly through the openings 36 past the mutually parallel oriented bracing arm portions 37 or legs of the U-shaped bracing arms 21. The web portion 29 then extends partly parallel to the leg 37, which then extends radially outwards again to receive the catch 31. The opening 36 in the leg 37 of the tensioner arm 21 extends towards the centre 22 of the mounting portion 12 so as to allow translational movement of the link 28 along the tensioner arm. For example, a guide 38 designed in this way makes it possible to achieve a torque-proof and/or torque-proof support for the pawl 31 during the translational movement along the tensioning arm 21.

Alternatively, it can also be provided that the web portion 29 is guided within the bracing arm 21 which is U-shaped in cross section, and then the web portion 29 which extends radially outward serves to receive the catch 31.

Fig. 15 shows an enlarged schematic view of an alternative embodiment of the interface of fig. 1 and 2, seen from the front. Fig. 16 shows a rear view of fig. 15. In this embodiment, the interface 19 has a thickened portion 66. The thickened portion 66 is oriented radially relative to the mounting point 22 of the mounting portion 12. The cross section of the tread portion 18 is enlarged in the region of the connecting opening 19. The wheel sections 16,17 are correspondingly narrowed. The thickened portion 66 is advantageously designed in the form of an arc segment or a hollow, as viewed in the circumferential direction of the wheel segments 16, 17. Preferably a rounded transition is provided.

By means of the thickening 66, an increased space is provided in the tread portion 18 of the interface 19 in order to integrate the closure mechanism 61 therein. In particular, this may allow the stiffening liner 58 to be better joined to the closures 62,63 to form the closure mechanism 61.

Fig. 17 shows a perspective view of an alternative embodiment of the fastening tab 34 of fig. 8-10 with form- fitting elements 54, 55. Fig. 18 and 19 show further positions of the form- fitting elements 54, 55. In this embodiment, the form- fitting elements 54,55 are designed in a zigzag manner. The saw-tooth-shaped positive-locking elements 54,55 are oriented relative to the mounting 12 in such a way that, during the driving of the connecting rod 28 in a translatory movement relative to the center 22, the positive-locking elements 54,55 can slide against one another, but have a locking effect in the opposite direction.

In this embodiment of the fastening tab 34, the form- fitting elements 54,55 are preferably arranged on the inner and outer side of the fastening tab 34. Alternatively, they may be provided only on the inner side or only on the outer side of the fastening tab 34.

When the form- fitting elements 54,55 are arranged on both sides, it is necessary to provide the form-fitting elements 55 on the inside and outside of the form-fitting elements 54, respectively, wherein the outer form-fitting elements 55 can be guided axially along the fastening element 32. The fastener 32 passes outwardly from the jaw portion through an indentation in the fastening tab 34. After the clamping positioning of the mounting portion 12 relative to the rim, the form-fitting piece 55 is in the position shown in fig. 19 relative to the form-fitting piece 54. The form- fitting elements 54,55 are fixed to each other by a fastening mechanism 33, such as a nut. The serrated elements engage each other and the set clamping position is held firmly.

In fig. 20-22, different views of an alternative embodiment of the tensioner arm 21 for the mounting portion 12 are shown. The bracing arms 21 differ in structural design from the embodiment in fig. 14. The tensioner arm 21 preferably has a U-shaped cross-section. The guide portion 40 is disposed between the two tightening arm portions 37, which together form a U-shaped cross section. The tensioner arm 21 is connected to the clamping mechanism 24. All the tightening arms 21 forming the mounting portion 12 advantageously have the same design as one another. The guide 38 for the connecting strip 28 is formed by a U-shaped slider 68. Its geometry is adjusted in such a way that the U-shaped slider 68 is guided against the two bracing arm sections 37 and the guide section 40. To reinforce the U-shaped slider, a block 69 with an internal thread 39 is provided, in which the engagement element 26 is received. The U-shaped slider 68 can thus be driven in a translatory movement along the tightening arm 21. At the same time, an anti-rotation effect is produced by the U-shaped slider 68 whose cross section is matched to the U-shaped bracing arm 21. The U-shaped slider 68 is held in place relative to the tightening arm 21 by a retainer 70. The securing element 70 can be guided, for example, in an elongated hole 71 provided in the guide part 40. The positioning element 70 is designed, for example, as a guide pin which engages on the outer side of the guide part 40 and prevents the U-shaped slider 28 from falling out. The connecting strip 28 is fixed to the U-shaped slider 68. Furthermore, the tie 28 can rest against a narrow end face of the bracing arm section 37 for support.

In an alternative embodiment, which is not shown in detail, the U-shaped slider 68 can also enclose the tensioning arm 21 on the outside. Again, a plurality of stoppers 70 are provided, which are then directed towards the engaging member 26. A block 69 connected to the engaging element 26 is arranged on at least one stop element 70 for the movable actuation of the slide 68.

In the above embodiment with respect to fig. 20-22, a slider or sliding coating may also be provided between the tensioner arm 21 and the U-shaped slider 68 to allow the jaws to be more easily clamped onto the rim bead.

Furthermore, when the clamping jaws 31 are connected to the connecting strip 28, it can be provided that the connection between the clamping jaws has a low elasticity, so that the clamping jaws can be optimally adapted to the rim bead according to the inch size. The connecting portions or webs 28 need not be straight but may have a radius corresponding to the rim bead radius. Advantageously, a rubber coating can also be provided on the underside of the connecting portion, so that support with respect to the rim bead or the spoke and/or scratch protection against the rim bead is obtained.

The fasteners or fastening mechanisms for connecting the wheel segments 16,17 of the roller 14 to the tensioner arm 21 or the mounting portion 12 are not shown in detail in fig. 20-22. They correspond to the above-described embodiments.

Figure 23 shows a perspective view of the tensioner arm 21, the structure of which corresponds to that of the embodiment shown in figures 20-22 and which is therefore fully referenced. Figure 23 shows a schematic side view of an embodiment of the tightening arm 21 according to figure 23. The embodiment according to fig. 23 differs from the embodiment according to fig. 20 to 22 in that the claws 31, which are oriented at equal distances with respect to the bracing arms 21, are oriented at an angle to one another such that the inner engagement surfaces or active surfaces of the claws 31 engage tangentially with the rim bead or are oriented toward the rim bead circumference. The longitudinal axis of the respective jaws is preferably oriented in such a way that it intersects the center 22. In the present embodiment, it is preferred that the connecting strip 28 and the catch 31 are designed in one piece. The jaws 31 may also be welded to the tie bars 28 or secured by removable fasteners.

In addition, in contrast to the embodiment according to fig. 20 to 22, a wedge 77 is arranged between the guide mechanism 38 and the connecting strip 28. The pawl 31 is thereby placed in position relative to the bracing arm 21 or the bracing arm 21 plane. The orientation of the jaws 31 is here intended to be such that the distance of their positioning from the plane of the bracing arm 21 is greater than the distance of the fastening element from the tie-rod 28 or, in the case of the one-piece embodiment, in the transition region between the jaws 31 and the tie-rod 28. This makes it possible to position the bracing arm 21 further from the rim, so that the spokes projecting from the rim bead are not damaged.

Fig. 25 shows a perspective view of a tie strip 28 with jaws 31 according to a preferred embodiment. Fig. 26 shows a schematic side view. In the present exemplary embodiment, the catch 31 is formed integrally with the connecting strip 28. A support 74 is preferably arranged between the jaws 31, which support extends in the same direction as the jaws 31, i.e. radially outwards, with respect to the connecting strip 28. A protective cover 75, in particular a rubber coating, is preferably arranged on the surface of the support 74 directed toward the mounting side. When the jaws 31 are stuck on the rim bead, the support 74, and in particular the cover 75 of the support 74, abuts against the outer side of the rim, so that there is a three-point clamping between the jaws 31 and the support 74. A further improved retention function and/or an improved clamping of the mounting portion 12 relative to the rim bead can thereby be achieved. Furthermore, a stiffening design in connection with the connecting strip 28 can be achieved thereby.

Fig. 27 shows a schematic view of an alternative embodiment of the bracing arm 21, which is snapped with the catch 31 onto the rim bead 86. FIG. 28 shows a side schematic view of an alternative embodiment of the tensioning arm 21 of FIG. 27. Fig. 29 and 30 show sectional views to show that the pawl 31 is received and guided longitudinally movably relative to the connecting piece 28 of the bracing arm 21.

In an alternative embodiment according to fig. 27 to 30, it is provided that the catch 31 is arranged on the connecting strip 28 so as to be longitudinally displaceable. The longitudinally movable arrangement preferably corresponds to the direction of tension created by the engagement members 26 as the tie bars 28 are moved toward the center 22 of the clamping mechanism 24. In the exemplary embodiment, it is provided that the connecting strip 31 is provided with positioning pins 81 on its respective outer section. These positioning pins 81 can be designed as so-called half-headed pins. The positioning pin 81 is inserted into the long hole 82 of the pawl 31, whereby the pawl 31 is longitudinally movably guided. In addition, the pawl 31 can also be guided to rotate about the positioning pin 81. Thereby allowing the engagement area of the jaws 31 to be better oriented with respect to the rim bead 86.

Advantageously, a sliding ramp 84 is provided between the tie-bar 28 and the jaws 31. In this embodiment, a slide slope 84 is provided adjacent to the long hole 82 on the pawl 31. Alternatively, the slide ramps 84 may be formed on the links 28.

Fig. 29 shows the catch 31 in an initial position relative to the tie 28. An initial position can be achieved in that a spring, not shown in detail, acts between the catch 31 and the connecting strip 28, so that the catch 31 is held in this initial position, but can also be brought into the final position shown in fig. 30.

Since the locking jaws 31 can be displaced longitudinally relative to the connecting strip 28 and the at least one sliding ramp 84 or sliding surface, a relative movement of the locking jaws 31 toward the rim bead 86 or a swiveling movement of the locking jaws 31 toward the rim bead 86 can also occur when the locking jaws 31 are moved from the initial position according to fig. 29 into the final position according to fig. 30. This inward rotation of the jaws 31 allows the jaws 31 to be more easily installed and inserted between the rim bead 86 and the friction edge of the tire 87.

Claims (23)

1. A spare tire for a vehicle wheel, comprising a rim and a tire mounted on the rim, wherein the spare tire allows for limited tire functionality in a use state fixed to the vehicle wheel, wherein,

-the spare tire is designed in multiple pieces and comprises a plurality of wheel segments (16,17) each having a tread portion (18) forming a common tread, and

-the spare tyre comprises a mounting portion (12) which, in said use condition, can be fixed to the rim of a vehicle wheel and has at least three tightening arms (21) extending radially outwards from a common center (22), on each tightening arm (21) at least one blocking jaw (31) which can be actuated by means of an engagement member (26) of a clamping mechanism (24) positioned at the center (22) of the mounting portion (12) for fixing the mounting portion (12) to the rim of the vehicle wheel,

it is characterized in that the utility model is characterized in that,

-a connecting strip (28) with at least two claws (31) is provided on at least two or each coupling element (26), and

-said jaws (31) being movable in translation with the coupling element (26) along the respective tightening arm (21) by means of the clamping mechanism (24).

2. Spare tire according to claim 1, wherein the blocking jaws (31) are oriented with the webs (28) preferably running alongside or perpendicular to the bracing arms (21) at the same distance from one another relative to the bracing arms (21), and preferably at an angle to one another, wherein the blocking surfaces of the blocking jaws (31) are oriented relative to the circumferential surface of the rim bead.

3. Spare tire according to claim 1 or 2, wherein the claws (31) arranged on each tie strip (28) have on their outer side fasteners (32), the wheel sections (16,17) can be fixed relative to the mounting (12) at the fasteners (32) of the claws (31), and at least one interface (19) between the tread portions (18) of the two wheel sections (16,17) can be arranged between two claws (31) provided on a tie strip (28).

4. Spare tire according to one of the preceding claims, wherein a support (74) is provided between the two claws (31) on the tie strip (28), which support extends radially outwards to abut against the outer side of the rim bead and preferably has a protective cover (75), in particular a rubber coating, towards the mounting side.

5. Spare tire according to one of the preceding claims, wherein the claws (31) are arranged obliquely towards the mounting side with respect to the plane formed by the tightening arm (21), and preferably a wedge (77) is provided between the tie strip (28) and the respective claw (31) or between the guide means (38) and the tie strip (28).

6. Spare tire according to one of the preceding claims, wherein a guide mechanism (38) is provided between the tie strip (28) and the tightening arm (21), by means of which guide mechanism the tie strip (28) can be guided in a translational movement in a rotationally fixed manner with respect to the tightening arm (21).

7. Spare tire according to claim 6, wherein the guide means (38) are formed by a tie section (29) of the tie (28) and a tightening arm section (37) of the tightening arm (21), which tie section and tightening arm section bear against each other or are plugged into each other in a form-fitting manner, and the tie section (29) is preferably guided through an opening (36) in the tightening arm section (37).

8. Spare tire according to claim 6, wherein the tightening arm (21) has a U-shaped cross section and is provided with a U-shaped slider (68), which is guided through the tightening arm (21) and the U-shaped slider (68) is held in position movably relative to the tightening arm (21) by means of a stopper (70), and the connecting strip (28) is fixed to the U-shaped slider (68).

9. Spare tire according to one of the preceding claims, wherein the tie strip (28) or a cap (51) which can be placed on the tightening arm (21) and preferably at least partially covers the engagement member (26) has a radially outwardly directed guide surface (52) against which the at least one wheel section (16,17) abuts and is radially supported after mounting on the mounting portion (12).

10. Spare tire according to one of the preceding claims, wherein fastening tabs (34) with elongated hole-like recesses (35) are provided on the wheel sections (16,17), the elongated hole-like recesses (35) preferably being oriented parallel to the tightening arm (21) or the center (22) of the mounting portion (12).

11. Spare tyre according to claim 9, characterized in that form-fitting elements (54,55) are provided between the fastening tabs (34) of the wheel sections (16,17) and the outer side faces of the claws (31) and/or between the fastening tabs (34) or the outer side faces of the fastening tabs (34) and fastening means which engage at the fasteners (32) of the claws (31) and which pass outwardly through the fastening tabs, which can be adjusted to different rim sizes and engage or snap into each other.

12. Spare tire according to claim 10, wherein the positive fit (54,55) between the pawl (31) and the fastening tab (34) is formed by a groove-shaped or saw-tooth shaped protrusion and a complementary shaped groove, said protrusion and groove being oriented tangentially or curvedly with respect to the center (22) of the mounting portion (12).

13. Spare tire according to one of claims 1 to 9, wherein at least two spaced-apart claws (31) are provided on the tie strip (28), said claws being held on the tie strip (28) longitudinally movable relative to the tightening arm (21) at least in the tightening direction of the tie strip (28).

14. Spare tire according to claim 13, wherein a positioning element, in particular a positioning pin (81), is provided on the tie strip (28) and is inserted into an elongated hole (82) in the clamping jaw (31), or wherein a positioning element, in particular a positioning pin (81), is provided on the clamping jaw (31) and is inserted into an elongated hole (82) in the tie strip (28), and wherein the clamping jaw (31) can preferably be driven to pivot or feed towards the rim bead (86) by means of a sliding groove or a sliding ramp (84) during the movement of the clamping jaw (31) and the tie strip (28) relative to each other.

15. Spare tire according to any one of the preceding claims, wherein a wheel section connection (41) is or can be provided on one of the two wheel sections (16,17), said wheel section connection having a plate-shaped section (42) on which a pin (44) is fixedly provided and which is preferably detachably fixed with one of the wheel sections (16,17), and which wheel section connection has a further pin (47) on the plate-shaped section (42) adjacent to the pin (44), onto which further wheel section (16,17) can be inserted and preferably can be locked.

16. Spare tire for a vehicle wheel, comprising a rim and a tire arranged on the rim, wherein the spare tire in the use state fixed to the vehicle wheel allows travel with limited tire functionality, wherein the spare tire is designed in multiple parts and comprises wheel segments (16,17) each having a respective tread portion (18) forming a common tread, and further comprising a mounting portion (12) which in the use state can be fixed to the rim of the vehicle wheel, or according to one of the preceding claims, characterized in that the tread portions (18) of the wheel segments (16,17) are reinforced by means of a reinforcement liner (51).

17. Spare tire according to claim 16, wherein the reinforcement liner (51) is vulcanized into the tread portion (18) of the wheel section (16, 17).

18. Spare tire for a vehicle wheel, comprising a rim and a tire mounted on the rim, wherein the spare tire in the use state fixed on the vehicle wheel allows travel with limited tire functionality, wherein the spare tire is designed in multiple parts and comprises a plurality of wheel segments (16,17), each having a respective tread portion (18) forming a common tread, and further comprises a mounting portion (12) which in the use state can be fixed on the rim of the vehicle wheel, or according to one of the preceding claims, characterized in that at each interface (19) of the tread portion (18) and/or of the wheel segments (16,17) a closure (61) is provided which positively and/or non-positively fixes the wheel segments (16,17) are connected to each other.

19. Spare tyre according to claim 18, characterized in that said closure (61) consists of two complementarily shaped closure portions (61,63) which are able to connect one of said wheel sections (16,17) to the other wheel section (16,17) by means of a plug, clip, sleeve or lock.

20. Spare tire according to claim 19, wherein the closure portions (62,63) are in succession in the circumferential direction of the wheel sections (16,17) in a rear engagement.

21. Spare tire according to claim 19 or 20, wherein each closing portion (62,63) is fixedly connected to a reinforcement liner (51) in the tread portion (18).

22. Spare tire according to one of the claims 18 to 21, wherein a thickening (66) is provided in the interface (19) of the tread portion (18) or adjacent to the interface (19) radially towards the center (22) of the mounting portion (12) and the cross section of the wheel sections (16,17) is preferably reduced at this interface (19).

23. Spare tire according to claim 22, wherein the thickening (66) is designed as a segment or a depression, viewed in radial direction, and the deepest point of the thickening (66) is aligned with the center (22) of the mounting portion (12) at the interface (19).

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