CN114347728A - Bicycle tire - Google Patents

Abstract

The invention discloses a bicycle tire which comprises a tire tread, wherein a central pattern block, a transition pattern block and an edge pattern block are sequentially arranged from the center of the tire tread to the edges of two sides along the circumferential direction; the heights of the central pattern block, the transition pattern block and the edge pattern block relative to the tread are sequentially increased; the transition pattern blocks comprise convex grain units, the convex grain units comprise convex grains which are adjacently arranged, the height of the convex grains relative to the tread is sequentially increased from the position adjacent to the central pattern block to the position adjacent to the edge pattern block, the convex grains comprise a bottom surface connected with the tread and an inclined surface opposite to the bottom surface, and the area of the inclined surface is sequentially reduced from the position adjacent to the central pattern block to the position adjacent to the edge pattern block. According to the invention, through the design of the tread patterns and the matching of the gradual change structure, the tire has no loss of light weight and low rolling resistance performance, and has good over-bending ground-grabbing performance and stability, so that the tire can be used by a bicycle with a mixture of a highway and a light off-road.

Description

Bicycle tire

Technical Field

The invention relates to the technical field of bicycle tires, in particular to a bicycle pneumatic tire which is matched with a road and a light off-road.

Background

Bicycle tires for use on highways (road surfaces) are expected to be lightweight and low in rolling resistance to ensure high speed and longer endurance, so that the tread of the tire is continuously smooth and fine in texture; on the other hand, a bicycle tire used on off-road roads (uneven roads) needs to have better performances such as grip, traction and the like to cope with sudden terrain changes, so that the tire tread pattern has large intervals and high height. In view of the above, when designing a bicycle tire for both highway and light off-road use, the tread combines two patterns, as shown in fig. 1, which is a sectional structure of the bicycle tire for both highway and light off-road use, wherein a smooth thin pattern 101, a slightly lower small pattern block 102 and a thicker and higher large pattern block 103 are respectively arranged in a central region, a transition region and an edge region of the tread 10, and the transition region is located between the central region and the edge region, so as to achieve both highway and light off-road mix performance.

However, the above-mentioned bicycle tire has problems of instability and insufficient grip during riding, particularly when changing from straight to curved and from a road to a light off-road. Specifically, three patterns of the center area, the transition area and the edge area of the existing tread 10 only change pattern styles, the pattern height difference of each area is large, the land ratio difference is also large, a fall feeling is generated when an overbending or a road turns to a light off-road ground, and smooth and stable transition cannot be realized; in addition, the existing lug blocks in the transition region have consistent strength, the grounding form is also fixed, and the problems of instability and insufficient ground gripping performance can not be solved by effectively and rapidly changing to deal with the change of the riding state.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a bicycle tire, which has good grip performance and stability over-bending without losing light weight and low rolling resistance performance by matching a tread pattern design with a gradual change structure, so as to satisfy the use of a bicycle with a mixture of highways and light off-road.

In order to achieve the above purpose, an embodiment of the present invention provides a bicycle tire, which includes a tread, wherein a central pattern block, a transition pattern block and an edge pattern block are sequentially arranged from the center of the tread to two side edges along the circumferential direction; the heights of the central pattern block, the transition pattern block and the edge pattern block relative to the tread are sequentially increased; the transition pattern blocks comprise convex grain units, the convex grain units comprise convex grains which are adjacently arranged, the height of the convex grains relative to the tread is sequentially increased from the position adjacent to the central pattern block to the position adjacent to the edge pattern block, the convex grains comprise a bottom surface connected with the tread and an inclined surface opposite to the bottom surface, and the area of the inclined surface is sequentially reduced from the position adjacent to the central pattern block to the position adjacent to the edge pattern block.

According to the bicycle tire provided by the embodiment of the invention, the transition pattern blocks comprise the convex grain units, the convex grain units comprise the convex grains which are adjacently arranged, the heights of the convex grains relative to the tire surface are sequentially increased from the adjacent central pattern block to the adjacent edge pattern block, the convex grains comprise the bottom surface connected with the tire surface and the inclined surface opposite to the bottom surface, the areas of the inclined surfaces are sequentially reduced from the adjacent central pattern block to the adjacent edge pattern block, the ground contact surface strain is changed, each area of the tire surface can be smoothly transited, and the over-bending ground-holding performance and the stability are improved. Therefore, the tire has the advantages that the tire does not lose light weight and low rolling resistance performance by matching the tread pattern design with the gradual change structure, and has good over-bending ground-grabbing performance and stability, so that the tire can be used by a bicycle with a mixture of a highway and a light off-road.

In addition, the bicycle tire according to the above embodiment of the present invention may further have the following additional features:

alternatively, the transition blocks are formed by regularly arranging the convex grain units in the circumferential direction, the convex grain units are arranged in the inclined sequence instead of being perpendicular to the center line of the tread in the top view state, and the inclined angles of the convex grain units relative to the center line of the tread are the same.

Alternatively, the inclination angle of each of the inclined surfaces is the same.

Specifically, the inclination angle of each inclined surface is 3-8 °.

Optionally, the shapes and sizes of the bottom surfaces of the convex grains of the same convex grain unit are the same, and the shapes of the bottom surfaces of the convex grains are polygons.

Optionally, the convex grains of the convex grain unit are conical convex grains.

Optionally, the inner ends of the transition blocks are disposed at an angle of inclination of 12 ° to 18 ° from the equatorial plane, and the outer ends of the transition blocks are disposed at an angle of 25 ° to 35 ° to the inner ends.

Optionally, the edge block is provided with a step and/or a chamfer adjacent to one side of the transition block.

Specifically, the edge pattern blocks are formed by sequentially arranging edge pattern block units along the circumferential direction, the edge pattern block units are formed by a first pattern block and a second pattern block, and the projection area of the first pattern block is smaller than that of the second pattern block; the first pattern block is provided with the step, and the second pattern block is provided with the corner cut.

Optionally, the center block is provided with a smooth surface.

Optionally, the central block surface is provided with first grooves extending obliquely from both sides to the centerline of the tread and second grooves extending obliquely from both sides to the centerline of the tread and crossing the centerline of the tread.

Drawings

FIG. 1 is a cross-sectional structural schematic view of a prior art bicycle tire;

FIG. 2 is a cross-sectional structural schematic view of the bicycle tire of the present invention;

FIG. 3 is an enlarged partial view of the tread of the bicycle tire of the present invention;

FIG. 4 is a schematic view of the tread pattern of the bicycle tire of the present invention;

FIG. 5 is an enlarged schematic view of a bead unit of the bicycle tire of the present invention;

FIG. 6 is a cross-sectional view of a bead unit of the bicycle tire of the present invention;

FIG. 7 is a schematic view of another tread pattern development for a bicycle tire of the present invention.

Description of the reference symbols

Tread 1, center block 2, first groove 21, second groove 22, transition block 3, bead unit 31, bead 311, bottom surface 3111, inclined surface 3112, side surface 3113, edge block 4, edge block unit 41, first block 411, second block 412, step 5, and cut corner 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

According to the invention, the transition pattern blocks comprise the convex block units, the convex block units comprise the convex blocks which are adjacently arranged, the heights of the convex blocks relative to the tread are sequentially increased from the adjacent central pattern block to the adjacent edge pattern block, the convex blocks comprise the bottom surface connected with the tread and the inclined surface opposite to the bottom surface, and the areas of the inclined surfaces are sequentially reduced from the adjacent central pattern block to the adjacent edge pattern block, so that the ground contact surface is changed, each area of the tread can be smoothly transited, and the over-bending ground grabbing performance and the stability are improved.

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

In fig. 2, 3, and 6, the vertical direction is set to the tire radial direction, the lateral direction is set to the tire axial direction, and the single-dot chain line indicates the equatorial plane; in fig. 4, 5, and 7, the vertical direction is set to the tire circumferential direction, the lateral direction is set to the tire axial direction, CL denotes the tread center line, the side close to the tread center line CL is defined as the inner side, the side far from the tread center line CL is defined as the outer side, the arrow direction represents the tire rolling direction, the side of the forward arrow is defined as the front side, and the side of the reverse arrow is defined as the rear side.

Example one

As shown in fig. 2 to 6, a bicycle tire according to a first embodiment of the present invention includes a tread 1, the tread 1 extends along a circumference, and a central block 2, a transition block 3, and an edge block 4 are sequentially disposed from a center of the tread 1 to two side edges along the circumference. The center block 2, the transition block 3, and the edge block 4 correspond to the center portion a, the transition portion B, and the edge portion C of the tread 1, respectively. The heights of the central pattern block 2, the transition pattern blocks 3 and the edge pattern blocks 4 relative to the tread 1 are increased in sequence; wherein, the transition block 3 comprises a convex grain unit 31, the convex grain unit 31 comprises convex grains 311 which are adjacently arranged, and the height of the convex grains 311 relative to the tread 1 is increased from the adjacent central block 2 to the adjacent edge block 4. Each of the lugs 311 disposed adjacent to the lug unit 31 includes a bottom surface 3111 connected to the tread 1 and an inclined surface 3112 opposite to the bottom surface 3111, and the area of the inclined surface 3112 decreases in order from the adjacent center block 2 to the adjacent edge block 4.

Because the transition pattern block 3 comprises the convex grain unit 31, the convex grain unit 31 comprises the convex grains 311 which are adjacently arranged, the height of the convex grains 311 relative to the tread 1 is sequentially increased from the adjacent central pattern block 2 to the adjacent edge pattern block 4, each convex grain 311 which is adjacently arranged on the convex grain unit 31 comprises the bottom surface 3111 which is connected with the tread 1 and the inclined surface 3112 which is opposite to the bottom surface 3111, the area of the inclined surface 3112 is sequentially reduced from the adjacent central pattern block 2 to the adjacent edge pattern block 4, the ground contact surface is changed, each area of the tread 1 can be smoothly transited, the over-bending grip and the stability are improved, namely, the tire does not lose the light weight and low rolling resistance performance by matching the tread pattern design with the gradual change structure, and the over-bending grip performance and the stability are good, so that the use of the bicycle which is mixed by highways and light off-roads is satisfied.

Alternatively, the center block 2 is provided with a smooth surface. The central part A (the area defined between two straight lines in FIG. 4) of the tread 1 is 15-25% of the total width W of the tread 1, which is the development width W1 symmetrical about the tread center line CL, the central part A is provided with a central pattern block 2 with a smooth surface, the two side edges of the central pattern block 2 can be continuous straight lines or concave-convex shapes, the area of the central pattern block 2 accounts for 80-100% of the total area of the central part A, and the two side edges of the central pattern block 2 in the embodiment are continuous straight lines and are arranged at a land ratio of 100%. That is, the center block 2 in the center portion a is designed to have a high land ratio, so that a large continuous ground contact area can be obtained, energy loss can be reduced, and rolling efficiency of the tire on a flat road surface can be maintained.

The transition portion B of the tread 1 (the area defined between the straight line and the broken line on the same side of the tread 1 in fig. 4) refers to both side areas between the central portion a and both edge portions C, the developed width W2 of the one-side transition portion B is 15% to 25% of the total developed width W of the tread 1, and a plurality of raised grain units 31 are provided in the transition portion B.

Alternatively, as shown in fig. 4, the transition block 3 is formed by arranging the lug units 31 regularly in the circumferential direction, and in a plan view, the lug units 31 are arranged in a tilted manner not perpendicular to the center line CL of the tread 1, and the angle of inclination of each lug unit 31 with respect to the center line CL of the tread 1 is the same, that is, the lugs 311 of the same lug unit 31 are arranged in sequence from the inner edge of the transition portion B outward and rearward. Alternatively, the convex grain 311 of the convex grain unit 31 is a conical convex grain.

Alternatively, each inclined surface 3112 is disposed in order from the adjacent center block 2 to the adjacent edge block 4, and the inclination angle of each inclined surface 3112 is the same. Specifically, each inclined surface 3112 is inclined at an angle of 3 ° to 8 °. Specifically, the bottom 3111 of each convex particle 311 of the same convex particle unit 31 has the same shape and size, and the bottom 3111 of each convex particle 311 has a polygonal shape.

Considering the grounding condition of the cross-over vehicle in actual use, the inner end of the transition part B is arranged at a position which is deviated from the equatorial plane and has an inclination angle alpha of 12-18 degrees, the included angle beta between the outer end and the inner end of the transition part B is 25-35 degrees, the transition pattern block 3 in the transition part B is formed by regularly arranging a plurality of convex granule units 31, each convex granule unit 31 comprises a plurality of different conical convex granules 311, the bottom surface 3111 of the conical convex granules 311 in the same unit is triangular or quadrangular, and a plurality of side surfaces 3113 extend from the edges of the bottom surface 3111 along the radial outer side of the tire and gradually approach to each other, thereby forming a grounding inclined surface 3112. The bottom 3111 of the taper in the same convex unit 31 has the same shape and size, the taper convex 311 is arranged from the inner edge of the transition part B to the back, the bottom 3111 of the adjacent taper convex 311 is connected, the convex height of the taper convex 311 from the inner side to the outer side in the axial direction is gradually higher, and the surface area of the inclined surface 3112 is gradually smaller.

Preferably: the convex particle unit 31 has four conical convex particles 311 from the inner side to the outer side in the axial direction, which are respectively a first conical convex particle, a second conical convex particle, a third conical convex particle and a fourth conical convex particle, wherein the bottom surface 3111 is rhombic and is connected with the first conical convex particle and the second conical convex particle which are close to the inner side in the axial direction, the tops of the third conical convex particles are all inclined surfaces 3112, the surface area of the inclined surfaces 3112 of the three conical convex particles 311 from the inner side to the outer side is gradually reduced, and the top of the conical convex particle 311 at the outermost side is a sharp point; the tops of the first conical convex grain, the second conical convex grain and the third conical convex grain which are close to the inner side in the axial direction are all designed into inclined platforms, the surface areas of the three inclined platforms from inside to outside are gradually reduced, and the top of the fourth conical convex grain at the outermost side is a sharp point.

In addition, the inner side height h1 of the top of the first conical convex grain is more than the inner side height h2 of the top of the second conical convex grain is more than the inner side height h3 of the top of the third conical convex grain is more than the top height h4 of the fourth conical convex grain, so that the ground contact surface of the conical convex grain in the transition part B is smoothly changed gradually, the gradually changing trend is a virtual line L, the transition can be smoothly carried out to the edge pattern block 4 of the edge part C, and the tire has superior over-curved ground gripping and stability no matter on roads or light off-road conditions. Further, the inclination angles γ of the top inclined surfaces 3112 of the four tapered convex particles 311 are all set to 3 ° to 8 °, and if the inclination angle γ is too small, the ground contact surface gradient tendency in the transition portion B cannot be achieved, and if the inclination angle γ is too large, the top inclined surfaces 3112 are too inclined, and the effect of smooth transition and gradient grounding cannot be achieved.

After the design, in order to satisfy the road condition of using a bicycle across the boundary, the pattern block types and the land ratio design in the central part A and the edge part C are different, so the tapered convex grains 311 in the transition part B are designed gradually, the tire surface 1 can smoothly transit and exert the characteristic advantages of patterns in each area no matter the tire runs straight to be bent or the road turns a light off-road.

The edge part C of the tread 1 refers to two side areas which are far away from the tread center line CL and close to the outer edge of the tread 1, the expanding width W3 of the single-side edge part C is 15% -20% of the expanding total width W of the tread 1, a plurality of independent spaced unit edge blocks 41 are arranged in the edge part C, each unit edge block 41 of the edge part C can be composed of one or more than one block, the area of the edge block 4 accounts for 20% -40% of the total area of the edge part C, the edge block 4 of the embodiment is two blocks, and the land ratio of the area is 30%. That is, the inner pattern blocks of the edge part C are designed with a low land ratio, the spaced pattern blocks can provide more edge effects, the pattern blocks are thick and hard to wear, and the over-bending ground-grabbing and traction performance of the tire on off-road or original road surfaces are improved.

In order to further improve the grip and stability of the turn, the edge blocks 4 of the edge portion C are optimized, optionally, the inner edges of the edge blocks 4 are provided with steps 5 and/or cut corners 6, i.e. the side of the edge block 4 adjacent to the transition block 3 is provided with steps 5 and/or cut corners 6. Specifically, the edge blocks 4 are formed by sequentially arranging edge block units 41 in the circumferential direction, the edge block units 41 are formed by first blocks 411 and second blocks 412, and the projected area of the first blocks 411 is smaller than that of the second blocks 412; the step 5 is arranged on the inner side edge of the first pattern block 411, the cut angle 6 is arranged on the inner side edge of the second pattern block 412, and through the step or the cut angle of the inner side edge, on one hand, the height of the pattern block passing through the bent first grounding edge is reduced, the strength of the first grounding edge is properly weakened, the tire can be stably transited to the edge portion C with the higher height from the central portion A and the transition portion B with the lower height, on the other hand, the effect of the bent first grounding edge can be increased, and the ground grabbing performance is improved. The first block 411 and the second block 412 are square blocks, and have inclined surfaces on the side surfaces, which are also called chocolate-shaped blocks, wherein the second block 412 has grooves and surface grooves.

Example two

As shown in fig. 7, a bicycle tire according to a second embodiment of the present invention is substantially the same as the first embodiment in structure, principle and design parameters, and the same parts are not described in detail, but different parts are as follows: the surface of the center block 2 is provided with first grooves 21 extending from both sides to the center line CL of the tread 1 in an inclined manner, and second grooves 22 extending from both sides to the center line CL of the tread 1 in an inclined manner and crossing the center line CL of the tread 1. That is, the thin groove design is added on the surface of the central block 2, the first grooves 21 on both sides and the second grooves 22 crossing the center line CL of the tread 1 are added, and in order to maintain good rolling efficiency of the tire on the road, the ratio of the area of the central block 2 after the thin groove is added to the total area of the central part A is more than 70%. By the design, the ground grabbing and traction performance on a light cross-country road surface is guaranteed, and the requirement of low rolling resistance on the road is met.

Alternatively, in describing the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A bicycle tire is characterized by comprising a tire tread, wherein a central pattern block, a transition pattern block and an edge pattern block are sequentially arranged from the center of the tire tread to the edges of two sides along the circumferential direction; the heights of the central pattern block, the transition pattern block and the edge pattern block relative to the tread are sequentially increased; wherein the transition blocks comprise lug units, the lug units comprise adjacently arranged lugs, and the heights of the lugs relative to the tread are sequentially increased from the adjacent central blocks to the adjacent edge blocks; the convex particles comprise a bottom surface connected with the tread and an inclined surface opposite to the bottom surface, and the area of the inclined surface is sequentially reduced from the position adjacent to the central pattern block to the position adjacent to the edge pattern block.

2. The bicycle tire according to claim 1, wherein said transition blocks are formed by a regular circumferential row of lugs, said lugs being arranged in a row inclined with respect to the centerline of said tread in a non-perpendicular manner in a top view, and wherein each of said lugs is inclined at the same angle with respect to the centerline of said tread.

3. A bicycle tire according to claim 1, wherein the inclined surfaces are inclined at the same angle; the inclination angle of each inclined surface is 3-8 degrees.

4. The bicycle tire according to claim 1, wherein the beads of the same bead unit have the same shape and size of the bottom surface, and the shape of the bottom surface of each bead is polygonal.

5. The bicycle tire of claim 1 wherein the lugs of the lug unit are tapered lugs.

6. A bicycle tire according to claim 1, wherein said transition blocks have inner ends disposed at an angle of 12 ° to 18 ° from the equatorial plane, and wherein said transition blocks have outer ends disposed at an angle of 25 ° to 35 ° from the inner ends.

7. A bicycle tire according to claim 1, wherein said edge blocks are stepped and/or chamfered adjacent one side of said transition blocks.

8. The bicycle tire according to claim 7, wherein said edge blocks are formed by a circumferential sequence of edge block units, said edge block units being formed by a first block and a second block, a projected area of said first block being smaller than a projected area of said second block; the step is arranged on one side, adjacent to the transition pattern block, of the first pattern block, and the corner cut is arranged on one side, adjacent to the transition pattern block, of the second pattern block.

9. A bicycle tire according to any one of claims 1 to 8, wherein said central blocks are provided with smooth surfaces.

10. A bicycle tire according to any one of claims 1 to 8, wherein said central block surface is provided with first grooves extending obliquely from both sides to the centerline of said tread and second grooves extending obliquely from both sides to the centerline of said tread and crossing said centerline of said tread.

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