A racing road bicycle tyre

Abstract

The application discloses a racing road bicycle tire, which comprises a tire, the tire comprises a tread and a carcass, a center area is arranged at the center of the tread, and side edge areas are arranged at both sides of the tread. The unfolding width of the center area of the tread of the tire is 15%-35% of the total unfolding width of the tread, the center area is a smooth surface, a plurality of inverted Z-shaped pattern groups are arranged in the side edge areas, the pattern group is cut into a plurality of diamond blocks by a plurality of inclined long grooves and high transverse inclined short grooves, the included angles of the inner and outer sidewalls of the inclined long grooves with the radial normal are different, the included angle β of the outer sidewall with the radial normal is greater than the included angle α of the inner sidewall with the radial normal, and the drainage and low rolling resistance performance are considered.

Description

Technical Field

[0001] This invention relates to the field of tire technology, specifically to a racing road bicycle tire. Background Technology

[0002] Tires are circular, elastic rubber products that are mounted on various vehicles or machinery and roll on the ground. They are usually mounted on metal rims, support the vehicle body, buffer external impacts, make contact with the road surface, and ensure the vehicle's driving performance. Racing road bicycles require the use of tires.

[0003] Racing road bikes prioritize speed, and fewer tread patterns result in lower rolling resistance. Therefore, conventional racing road bike tires have smooth or near-smooth treads. However, smooth treads provide insufficient drainage channels and edge effects, leading to poor tire grip and anti-skid performance, posing safety hazards, especially at high speeds and on wet surfaces. To increase tread edge effects and address drainage issues, current methods involve increasing the number of tread grooves or connecting existing grooves to create more drainage channels. However, this also results in more crisscrossing grooves cutting into the tread, weakening its rigidity. Conventional road bike tires have equal inclination angles on the inner and outer walls of the tread grooves, typically small (less than or equal to 10°). Smaller groove wall angles allow for larger drainage channels, but the base strength of the tread blocks is lower, exacerbating creep upon contact with the ground, increasing rolling resistance, and consequently affecting starting and acceleration efficiency. In addition, in pursuit of ultimate speed, current road bike tires are thin and lightweight, so their air retention and puncture resistance urgently need improvement. Previous improvement technologies have added a protective layer to the outside of the cord layer in the crown, which only provides limited protection for the crown and cannot achieve the effect of air retention and sidewall protection for the entire tire body. Summary of the Invention

[0004] The purpose of this invention is to provide a racing road bicycle tire to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a racing road bicycle tire, comprising a tire, the tire comprising a tread and a carcass, a central region being provided at the center of the tread, and side regions being provided on both sides of the tread, the central region having an unfolded width of 15%-35% of the total unfolded width of the tread, the central region being a smooth surface, and a plurality of tread units distributed circumferentially at intervals being provided in the side regions, each tread unit comprising two tread groups, the two tread groups being symmetrically distributed along the tread centerline CL and then staggered, the tread group being cut into several rhomboid blocks by several inclined long grooves and inclined short grooves with high transverse direction, the tread group being inverted Z-shape overall.

[0006] Preferably, the tread pattern includes three longitudinally inclined grooves, namely a first inclined groove, a second inclined groove, and a third inclined groove, which are distributed from the inside out. The ends of the three inclined grooves are close to the center line CL of the tread, and the tails are inclined towards the outer end away from the center line CL of the tread. That is, the direction of the three inclined grooves is in the same direction as the tire travels. The tail of the third inclined groove runs through the edge of the tread. The end positions of the three inclined grooves are arranged in descending order from the inside to the outside.

[0007] Preferably, the inner wall of the inclined ditch is provided with an included angle, and the outer wall of the inclined ditch is provided with an included angle, wherein the included angle of the outer wall of the inclined ditch is greater than the included angle of the inner wall of the inclined ditch.

[0008] Preferably, the included angle of the inner sidewall of the inclined long trench is set to 10°-15°, and the included angle of the outer sidewall of the inclined long trench is set to 20°-25°.

[0009] Preferably, a number of high transverse inclined short grooves are provided between the three inclined long grooves and between the third inclined groove and the edge of the tread. The inclined short grooves connect adjacent inclined long grooves. The inner end of each inclined short groove overlaps with the inclined long groove, and the outer end is a closed apex with a triangular opening on the surface.

[0010] Preferably, the bottom of the inclined short ditch is an inclined surface from the inner end to the outer end, the depth of the ditch at the outer tip of the inclined short ditch is 0mm, and the inclined short ditch is semi-connected to the adjacent inclined long ditch.

[0011] Preferably, the circumferential length of the inner end of the pattern group is less than the circumferential length of the outer end of the pattern group.

[0012] Preferably, the tire carcass and the inner surface of the tire carcass are provided with an inner cord layer, the outer side of the tire carcass is provided with an outer cord layer, both sides of the tire carcass are provided with a bead, and the outer side of the outer cord layer corresponding to the bead is provided with a film.

[0013] Preferably, the inner cord layer is provided with two protective layers symmetrically distributed along the equatorial plane. The two protective layers are partially overlapped at one end in the central part and extend to the tire bead at the other end. The protective layers adopt a nylon interwoven structure.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The tire of this invention has a tread center area with a unfolded width of 15%-35% of the total tread unfolded width. The center area is a smooth surface, and multiple inverted Z-shaped tread patterns are set in the two side areas. Each tread pattern is formed by cutting several rhomboid blocks from several inclined long grooves and inclined short grooves with high lateral angles. The angles between the inner and outer side walls of the inclined long grooves and the radial normal are designed to be different, with the angle between the outer side wall and the radial normal being greater than that between the inner side wall and the radial normal, thus balancing water drainage and low rolling resistance performance. The inclined short grooves with high lateral angles connect adjacent... The sloping grooves, with triangular openings and sloping bottoms from the inner to the outer ends, aid in drainage, enhance edge effect, and improve grip and anti-skid performance. The tire carcass has at least one ply layer, with two protective layers inside the ply layer, one end partially overlapping at the center and the other extending to the bead. The protective layers use a nylon interwoven structure, and a high-air-retention film is applied to the outer ply layer corresponding to the bead, effectively improving the tire's air retention and puncture resistance, thus comprehensively enhancing the safety of racing road bicycle tires. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of the tire of the present invention;

[0017] Figure 2 This is a tread pattern unit of the tire tread of the present invention;

[0018] Figure 3 This is an enlarged schematic diagram of the tire tread pattern of the present invention;

[0019] Figure 4 For invention Figure 3 Sectional view of AA;

[0020] Figure 5 For invention Figure 3 BB section view;

[0021] Figure 6 This is a schematic diagram of the forming process of the tire carcass 2 of the present invention.

[0022] In the diagram: Tire T, Tread 1, Carcass 2, Center Area 1A, Side Area 1B, Center Area Width W1, Total Tread Width W, Tread Pattern Group 11, First Inclined Groove 111, Second Inclined Groove 112, Third Inclined Groove 113, Inclined Short Groove 114, Inclined Long Groove Inner Wall Angle α, Inclined Long Groove Outer Wall Angle β, Inclined Long Groove Depth H, Inverted Z-Shaped Inner End Circumferential Length L1, Inverted Z-Shaped Outer End Circumferential Length L2, Inner Cord Layer 21A, Outer Cord Layer 21B, Bead 22, Protective Layer 23, Rubber Sheet 24. Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] The tire T, tread 1, carcass 2, center region 1A, side region 1B, center region unfolded width W1, total tread unfolded width W, tread pattern group 11, first inclined groove 111, second inclined groove 112, third inclined groove 113, inclined short groove 114, inclined long groove inner sidewall angle α, inclined long groove outer sidewall angle β, inclined long groove depth H, inverted Z-shaped inner end circumferential length L1, inverted Z-shaped outer end circumferential length L2, inner cord layer 21A, outer cord layer 21B, bead 22, protective layer 23, and film 24 components of this application are all general standard parts or components known to those skilled in the art. Their structures and principles can be obtained by those skilled in the art through technical manuals or conventional experimental methods. Figure 1 , Figure 6 The vertical direction is set as the tire radial direction, the horizontal direction is set as the tire axial direction, and the single-dot dashed line represents the equatorial plane; Figure 2-3 The vertical direction is set as the tire circumference, the horizontal direction is set as the tire axis, CL represents the tire tread centerline, the end closer to the tire tread centerline CL represents the inner end, and the end farther from the tire tread centerline CL represents the outer end. The arrow direction represents the tire's driving direction, with the forward arrow representing the front end and the reverse arrow representing the rear end.

[0026] Please see Figures 1-6A racing road bicycle tire includes a tire T, which includes a tread 1 and a carcass 2. A central region 1A is provided at the center of the tread 1, and side regions 1B are provided on both sides of the tread 1. The side regions 1B are symmetrical side regions for turning and contacting the ground. The unfolded width W1 of the central region 1A is set to 15%-35% of the total unfolded width W of the tread. The central region 1A is a smooth surface without any tread blocks or grooves to ensure low rolling resistance. A plurality of tread units are provided in the side regions 1B at circumferential intervals. Each tread unit includes two tread groups 11. The two tread groups 11 are symmetrically distributed along the center line CL of the tread and then staggered. The tread group 11 is cut into several rhomboid blocks by several inclined long grooves and high transverse inclined short grooves 114. The tread group 11 is inverted Z-shaped.

[0027] The tread pattern 11 includes three longitudinally inclined grooves, namely the first inclined groove 111, the second inclined groove 112, and the third inclined groove 113, which are distributed from the inside to the outside. All three inclined grooves are inclined at the ends close to the center line CL of the tread and at the ends away from the center line CL of the tread. That is, the direction of the three inclined grooves is in the same direction as the tire travels. The end of the third inclined groove 113 runs through the edge of the tread 1. The ends of the three inclined grooves are arranged in descending order from the inside to the outside. The overall directional inclined grooves are designed to provide a smooth drainage channel.

[0028] The inner wall of the inclined long ditch is provided with an included angle α, and the outer wall of the inclined long ditch is provided with an included angle β. The included angle β of the outer wall of the inclined long ditch is greater than the included angle α of the inner wall of the inclined long ditch.

[0029] The included angle α of the inner sidewall of the inclined long trench is set to 10°-15°, and the included angle β of the outer sidewall of the inclined long trench is set to 20°-25°. The included angles of the inner and outer sidewalls of the inclined long trench with the radial normal are designed differently, with the included angle β of the outer sidewall being greater than the included angle α of the inner sidewall. The angle α of the inner sidewall of the inclined groove is 10°-15°. If the angle α is less than 10°, the edge of the inner tread block is close to 90°, resulting in lower strength at the base of the tread block. This will exacerbate creep and increase rolling resistance upon contact with the ground. However, if the angle α is too large, it will reduce the width of the groove bottom and decrease the drainage volume. Setting the angle β of the outer sidewall of the inclined groove to 20°-25° results in a larger angle and stronger base strength of the edge tread block, ensuring tread rigidity. However, if the angle β is too large, not only will the drainage volume be significantly reduced, affecting the smooth drainage of water from the groove, but the tread block will also be too strong to deform, resulting in insufficient grip upon contact with the ground and negatively impacting anti-skid performance. Therefore, the design of a smaller inner and larger outer sidewall angle, optimizing the angles of the outer and inner sidewalls of the inclined groove, balances drainage, anti-skid performance, and low rolling resistance.

[0030] Several high transverse inclined short grooves 114 are provided between the three inclined long grooves and between the third inclined groove 113 and the edge of the tread 1. The inclined short grooves 114 connect to the adjacent inclined long grooves. The inner end of each inclined short groove 114 overlaps with the inclined long groove, and the outer end is a closed apex. The surface opening is triangular.

[0031] The bottom of the inclined short groove 114 is inclined from the inner end to the outer end. The groove depth at the outer tip of the inclined short groove 114 is 0mm. The inclined short groove 114 is partially connected to the adjacent inclined long groove. The groove depth at the inner end of the inclined short groove 114 is the same as the groove depth H of the inclined long groove, gradually transitioning to a groove depth of 0mm at the outer tip. The inclined short groove 114 is partially connected to the adjacent inclined long groove, which plays a role in guiding and assisting drainage, helping water stains in the third inclined groove 113 to be smoothly and quickly discharged from the edge of the tread 1. Compared with the conventional method of complete intersection of transverse and longitudinal tread grooves, the inclined short groove 114 has an overall high transverse triangular design, with both ends not completely connected to the inclined long groove. This can reduce the degree of tread rigidity weakening caused by the inclined short groove 114, and the edge effect generated by the triangular shape makes it easier to break the water film, enhancing drainage and anti-skid performance. At the same time, the groove bottom with gradually changing depth forms a gently inclined surface, guiding and assisting drainage, ensuring tread rigidity and rolling resistance performance.

[0032] The pattern group 11, cut by three high longitudinal inclined grooves and several high transverse inclined short grooves 114, is in the shape of an inverted Z. The circumferential length L1 of the inner end of the pattern group 11 is less than the circumferential length L2 of the outer end of the pattern group 11, so that the inverted Z-shaped direction of the pattern group 11 is in line with the tire's driving direction, increasing the racing feel of the road bicycle tire.

[0033] The tire carcass 2 is configured to have at least one ply layer. In this embodiment, it has two ply layers. An inner ply layer 21A is provided on the inner surface of the tire carcass 2, and an outer ply layer 21B is provided on the outer side of the tire carcass 2. Both sides of the tire carcass 2 are provided with bead 22. After the inner ply layer 21A and the outer ply layer 21B are attached together, their ends are respectively wrapped around the bead 22 and folded back a certain distance. The folding width of the inner ply layer 21A is smaller than the folding width of the outer ply layer 21B. Two protective layers 23 are provided inside the inner ply layer 21A, which are symmetrically distributed along the equatorial plane. One end of the two protective layers 23 is partially overlapped at the center, and the other end extends to the bead 22. The protective layers 23 adopt a nylon interwoven structure. A film 24 with excellent air retention is attached to the outer side of the outer ply layer 21B corresponding to the bead 22. The overlapping protective layer 23 forms a two-layer protective layer at the crown, which enhances the crown's protective effect compared to a conventional single-layer protective layer. The other end of the protective layer 23 covers the sidewall, giving the sidewall puncture-proof properties as well. Furthermore, unlike the conventional method of adding a protective layer outside the cord layer, the protective layer 23 is placed inside the cord layer, with the cord layer wrapping around the overlapping protective layer 23, resulting in a more stable structure. The nylon interwoven structure effectively improves the air retention and puncture resistance of the entire road bike tire. A rubber patch 24 is added to the outside of the bead 22 to prevent air leakage at the bead 22 area. By optimizing the tire carcass structure design, the safety performance of racing road bike tires can be comprehensively improved.

[0034] In use, the tire T mainly consists of two parts: the tread 1 and the carcass 2. The tread 1 is divided into a central area 1A and two side areas 1B. The unfolded width W1 of the central area is set to 15%-35% of the total unfolded width W of the tread. The central area 1A is a smooth surface. The two side areas 1B are provided with a plurality of inverted Z-shaped tread pattern groups 11. The tread pattern group 11 is cut into a number of rhomboid blocks by several inclined long grooves and inclined short grooves 114 with high lateral angles. The angle between the inner and outer side walls of the inclined long grooves and the radial normal is designed to be different. The angle β between the outer side wall and the radial normal is greater than the angle α between the inner side wall and the radial normal, which takes into account both water drainage and low pressure. Rolling resistance performance; high lateral inclined short grooves 114 connect adjacent inclined long grooves, with triangular openings on the surface and inclined surfaces from the inner end to the outer end of the groove bottom, which assists in drainage, increases edge effect, and improves grip and anti-skid performance; the carcass 2 has at least one layer of cord layer, and two protective layers 23 are set inside the cord layer, with one end partially overlapping in the center and the other end extending to the bead 22. The protective layers 23 adopt a nylon interwoven structure; a high-air-retention film 24 is attached to the outer side of the outer cord layer 21B corresponding to the bead 22, which effectively improves the air retention performance and puncture resistance and explosion-proof performance of the carcass, and can comprehensively improve the safety of racing road bicycle tires.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A racing road bicycle tire, characterized in that: The tire (T) includes a tread (1) and a carcass (2). A central region (1A) is provided at the center of the tread (1), and side regions (1B) are provided on both sides of the tread (1). The unfolded width (W1) of the central region (1A) is set to 15%-35% of the total unfolded width (W) of the tread. The central region (1A) is a smooth surface. A plurality of tread units are provided in the side regions (1B) at intervals along the circumference. Each tread unit includes two tread groups (11). The two tread groups (11) are symmetrically distributed along the center line CL of the tread and then staggered. The tread group (11) contains several inclined long grooves and several rhomboid blocks cut by inclined short grooves (114) with high transverse direction. The tread group (11) is an inverted Z shape. The tread pattern (11) includes three longitudinally inclined grooves, with the first inclined groove (111), the second inclined groove (112) and the third inclined groove (113) distributed axially from the inside to the outside. The three inclined grooves are all inclined at the end close to the center line CL of the tread and at the tail end away from the center line CL of the tread. That is, the direction of the three inclined grooves is in the same direction as the tire travels. The tail of the third inclined groove (113) passes through the edge of the tread (1). The end positions of the three inclined grooves are arranged in a descending manner from the inside to the outside. The inner wall of the inclined long ditch is provided with an included angle (α), and the outer wall of the inclined long ditch is provided with an included angle (β). The included angle (β) of the outer wall of the inclined long ditch is greater than the included angle (α) of the inner wall of the inclined long ditch. The inner side of the tire body (2) is provided with an inner cord layer (21A), the outer side of the tire body (2) is provided with an outer cord layer (21B), and both sides of the tire body (2) are provided with tire bead (22). The outer side of the outer cord layer (21B) corresponding to the tire bead (22) is provided with a film (24). The inner ply yarn layer (21A) is provided with two protective layers (23). One end of the two protective layers (23) is partially overlapped at the center and the other end extends to the tire bead (22). The protective layers (23) adopt a nylon interwoven structure.

2. The racing road bicycle tire according to claim 1, characterized in that: The included angle (α) of the inner sidewall of the inclined long trench is set to 10°-15°, and the included angle (β) of the outer sidewall of the inclined long trench is set to 20°-25°.

3. A racing road bicycle tire according to claim 1, characterized in that: Several high transverse inclined short grooves (114) are provided between the three high longitudinal inclined long grooves and between the third inclined groove (113) and the edge of the tread (1). The inclined short grooves (114) connect adjacent inclined long grooves. The inner end of each inclined short groove (114) overlaps with the inclined long groove, and the outer end is a closed apex. The surface opening presents a triangle.

4. A racing road bicycle tire according to claim 3, characterized in that: The bottom of the inclined short ditch (114) is an inclined surface from the inner end to the outer end. The depth of the ditch at the outer tip of the inclined short ditch (114) is 0 mm. The inclined short ditch (114) is semi-connected to the adjacent inclined long ditch.

Images