PNEUMATIC TIRE FOR BICYCLE

Abstract

The invention relates to a two-wheeled vehicle pneumatic tire (1), preferably bicycle tire, particularly preferably racing bike tire (1), having a tread (2), a tire carcass, tire side walls (3) and two bead regions (4), each with a tire bead with a core (5), wherein the tire carcass comprises two carcass inlays (6,6′) wherein the two carcass inlays (6, 6′) extend from a zenith region (17) of the two-wheeled vehicle pneumatic tire (1) over the tire side walls (3) as far as the two bead regions (4) and are looped there around the respective core (5) from axially on the inside axially outward and end with carcass inlay ends (7,7′) and wherein the two bead regions (4) each have a bead protective strip (8) arranged on the carcass from the outside as protection against chafing.

The problem addressed is that of improving the rolling resistance.

The problem is solved in that the carcass inlay ends (7′) of the inner carcass inlay (6′) are covered from the outside by the respective bead protective strip (8), wherein the inner carcass inlay (6′) is formed by that carcass inlay of the two carcass inlays (6, 6′) which is the radially inner carcass inlay in the zenith region (17). The invention furthermore relates to a two-wheeled vehicle having a tire of said type.

Claims

1.-15. (canceled)

16. A pneumatic bicycle tire comprising: a tread positioned proximate a top portion of the tire; a tire carcass comprising an outer carcass inlay and an inner carcass inlay, the tire carcass positioned below the tread; a damping rubber inlay positioned between the tread and the tire carcass proximate the top portion of the tire; tire side walls on sides of the tire; two bead regions positioned at a base of the tire side walls, each with a tire bead and a core; the inner and outer carcass inlays extend from a zenith region (17) over the tire side walls as far as the two bead regions and are looped around respective cores; a bead protective strip arranged on the carcass to cover ends of the inner and outer carcass inlays, a portion of the sidewalls and wraps around a portion of a bead region of the two bead regions; and the bead protective strip comprises a rubberized monofilament fabric and is free of intertwined fibers and microchannels to maintain airtightness for tubeless operation.

17. The tire of claim 16, wherein the bead protective strip (8) ends at a radially outer end (12) at a first height (13) of 10 mm to 12 mm, as measured relative to an outermost turning point (14) of the reinforcement members of the inner carcass inlay (6′) that are looped around the core (8).

18. The tire of claim 17, an inner carcass inlay end of the inner carcass inlay is arranged at a second height (15) of 8 mm to 10 mm, as measured relative to an outermost turning point (14) of the reinforcement members of the inner carcass inlay (6′) that are looped around the core.

19. The tire of claim 18, wherein the carcass inlay ends of the inner carcass inlay (6′) end in the bead region (4).

20. The tire of claim 16, wherein the bead protective strip (8) is designed as a rubberized fabric band.

21. The tire of claim 16, the carcass is in direct contact with the tire interior (10).

22. The tire of claim 16, the tire is a tubeless tire.

23. The tire of claim 16, the tire is a clincher tire for a bicycle.

24. The tire of claim 16, wherein only the inner inlay and the outer inlay have reinforcement members.

25. The tire of claim 16, an outer carcass inlay end is covered by the inner carcass inlay and the bead protective strip.

26. The tire of claim 16, the damping rubber inlay comprises a highly elastic rubber and is arranged between the tread and the tire carcass, wherein the damping rubber inlay (9) in particular has a material thickness between 0.2 and 1 mm, and/or in that a protective ply (4) comprising a particularly tear-resistant fabric, preferably a fabric comprising fibers made from polyethylene terephthalate-polyacrylate, is arranged between the tread strip (2) and the tire carcass.

27. The tire of claim 16, wherein the tire is part of a mountain bike bicycle or a bicycle having an electric motor for driving the bicycle.

Description

[0074] Further features, advantages and details of the invention will now be explained in more detail with reference to the schematic drawings, which represent exemplary embodiments. In the drawings:

[0075] FIG. 1: shows a two-wheeled vehicle tire in cross section;

[0076] FIG. 2: shows a detail of a two-wheeled vehicle tire in cross section.

[0077] FIG. 1 shows the essential tire components of the two-wheeled vehicle tire 1 in a cross-sectional view. The tire is a two-wheeled vehicle pneumatic tire 1, preferably a bicycle tire, particularly preferably a racing bike tire 1, with a tread 2, a tire carcass, tire sidewalls 3 and two bead regions 4, each with a tire bead with a core 5.

[0078] The tire carcass comprises two carcass inlays 6,6′, wherein the two carcass inlays 6, 6′ each have individual reinforcement members running parallel to one another, the reinforcement members being arranged at an angle of 40 degrees to 60 degrees with respect to the direction of rotation U and the reinforcement members of the two carcass inlays 6 having an opposite pitch angle, and wherein the two carcass inlays 6, 6′ extend from a zenith region 17 of the two-wheeled vehicle pneumatic tire 1 over the tire sidewalls 3 as far as the two bead regions 4 and are looped there around the respective core 5 from axially on the inside axially outward and end with carcass inlay ends 7,7′ having reinforcement member ends of the carcass inlay 6,6′.

[0079] Furthermore, the two bead regions 4 each have a bead protective strip 8 arranged on the carcass from the outside as protection against chafing.

[0080] The two-wheeled vehicle tire is distinguished in that at least the carcass inlay ends 7′ of the inner carcass inlay 6′ are covered from the outside by the respective bead protective strip 8, wherein the inner carcass inlay 6′ is formed by that carcass inlay of the two carcass inlays 6, 6′ which is the radially inner carcass inlay in the zenith region 17. The outer carcass inlay 6 is formed here by that carcass inlay of the two carcass inlays 6, 6′ which is the radially outer carcass inlay in the zenith region.

[0081] The carcass inlay ends 7′ and thus the reinforcement member ends of the inner carcass inlay 6′ are thus arranged between the bead protective strip 8 and the outer carcass inlay 6, wherein a rubber coating of the inner carcass inlay 6′ can be arranged between the reinforcement member ends of the carcass inlay end 7″ and the bead protective strip 8. A straight line 18 oriented perpendicular to the bead protective strip 8 can connect the bead protective strip 8 and the carcass inlay end 7′.

[0082] In the case of rubberized plies having reinforcement members, in particular the carcass inlays 6, 6′ and/or the bead protective strip 8, the lines shown schematically represent the extent of the reinforcement members.

[0083] The bead protective strip 8 can end at a radially outer end 12 at a first height 13 of at most 15 mm, preferably of 10 mm to 12 mm, as measured relative to an outermost turning point 14 of an outer edge of the reinforcement members of the inner carcass inlay 6′ that are looped around the core 5. Alternatively or additionally, the carcass inlay ends 7′ of the inner carcass inlay 6′ can be arranged at a second height 15 of at most 13 mm, preferably of 8 mm to 10 mm, as measured relative to an outermost turning point 14 of the reinforcement members of the inner carcass inlay 6′ that are looped around the core 5.

[0084] A dimensioning of the first height 13 and the second height 15 is illustrated in FIG. 2.

[0085] The bead protective strip 8 is designed as a rubberized band having fibers, in particular as a rubberized fabric band. The fibers, in particular the fabric edge of the fabric, predetermine the radially outer end 12 of the bead protective strip 8.

[0086] The carcass inlay ends 7′ of the inner carcass inlay 6′ can end in the bead region 4, in particular coming from the core 5 in front of the sidewall 3.

[0087] In particular for tubeless operation, the bead protective strip 8 is free of threads which have intertwined fibers and connect a radially outer end 12 of the bead protective strip 8 and an inner end 16 of the bead protective strip 8. For this purpose, the bead protective strip 8 can be designed as a rubberized monofilament fabric.

[0088] The carcass can be in direct contact with the tire interior 10.

[0089] At least in one region of the sidewall 3, in particular adjoining the bead strip 8 radially from the outside, the two carcass inlays 6, 6′ can be the only inlays having reinforcement members.

[0090] The carcass inlay ends 7 of the outer carcass inlay 6 of the two carcass inlays 6,6′ can be covered from the outside by the inner carcass inlay 6′ or by the bead protective strip 8. The outer carcass inlay 6 here is the radially outer of the two carcass inlays 6, 6′ in the zenith region.

[0091] A damping rubber inlay (9) composed of a highly elastic rubber can be arranged between the tread (2) and the tire carcass, the damping rubber inlay 9 having in particular a material thickness between 0.2 mm and 1 mm. The damping rubber inlay can preferably be composed of a highly elastic rubber having a material rebound value between 70 and 80.

[0092] A protective ply (not shown) comprising a particularly tear-resistant fabric, preferably a fabric comprising fibers made of polyethylene terephthalate-polyacrylate, can be arranged between the tread 2 and the tire carcass.

[0093] The reinforcement members of the carcass inlays are preferably arranged at an angle to the direction of rotation U of 42 degrees to 48 degrees, particularly preferably 43 degrees to 48 degrees.

[0094] The tire can in particular be a “tubeless” tire or a “tubeless ready” tire. The tire can be suitable, intended and used for tubeless operation. The tire for tubeless operation or the tubeless tire can in particular be part of a bicycle, with the tire interior 10 enclosed by a rim and the tire 1 being without a tube.

[0095] The tire can be a bicycle tire 1, in particular a racing bike tire 1, a mountain bike tire or a tire for a bicycle having an electric motor for driving the bicycle. The tire can be suitable, intended and used for a corresponding bicycle. In particular, a bicycle, in particular a racing bike, a mountain bike or a bicycle having an electric motor for driving the bicycle, can have such a tire 1.

[0096] The tire 1 shown is preferably a racing bike tire.

[0097] A tire for operation with a tube, in particular a clincher tire, can also have a corresponding advantageous construction. Motorcycle tires, in particular electric scooter tires, can also have the advantageous construction shown.

[0098] FIG. 2 illustrates the dimensioning of the first height 13 and the second height 15.

[0099] To determine the first height 13 and the second height 15, the two-wheeled vehicle pneumatic tire 1 can be bent up in its cross section in such a way that the two carcass inlays 6, 6′ coming from the zenith region 17 are arranged substantially rectilinearly in the region of the sidewall 3 and merge into a looping around the core 5 that is substantially symmetrical with respect to the core 5. This can be a detail of the tire of FIG. 1, with the two-wheeled vehicle pneumatic tire 1 being correspondingly bent up in its cross section.

[0100] In this arrangement, the first height 13 of the radially outer end 12 of the bead protective strip 8 is measured relative to the outermost turning point 14 of an outer edge of the reinforcement members of the inner carcass inlay 6′ that are looped around the core 5 and measured parallel to the carcass inlays 6, 6′ that are arranged substantially rectilinearly.

[0101] In this arrangement, the second height 15 of the carcass inlay ends 7′ is measured relative to the outermost turning point 14 of an outer edge of the reinforcement members of the inner carcass inlay 6′ that are looped around the core and measured parallel to the carcass inlays 6, 6′ arranged substantially rectilinearly.

LIST OF REFERENCE DESIGNATIONS

Part of the Description

[0102] 1 Two-wheeled vehicle pneumatic tire [0103] 2 Tread [0104] 3 Sidewall [0105] 4 Bead region [0106] 5 Core [0107] 6 Outer carcass inlay [0108] 6′ Inner carcass inlay [0109] 7 Carcass inlay end of the outer carcass inlay [0110] 7′ Carcass inlay end of the inner carcass inlay [0111] 8 Bead protective strip [0112] 9 Rubber inlay [0113] 10 Tire interior [0114] 11 Tire exterior [0115] 12 Radially outer end of the bead protective strip [0116] 13 First height [0117] 14 Outermost turning point [0118] 15 Second height [0119] 16 Inner end [0120] 17 Zenith region [0121] 18 Straight line [0122] rR Radial direction [0123] aR Axial direction [0124] U Direction of rotation