CN109397992B

CN109397992B - Tread pattern of bicycle tire

Info

Publication number: CN109397992B
Application number: CN201710698644.6A
Authority: CN
Inventors: 陈秀雄
Original assignee: Cheng Shin Rubber Xiamen Ind Ltd
Current assignee: Cheng Shin Rubber Xiamen Ind Ltd
Priority date: 2017-08-15
Filing date: 2017-08-15
Publication date: 2024-09-06
Anticipated expiration: 2037-08-15
Also published as: CN109397992A

Abstract

The invention discloses a tread pattern of a bicycle tire, wherein a fine pattern extends from a central region to a side region, the axial outer side of the tread pattern is wavy and extends along the circumferential direction of the tire, and side pattern blocks and shoulder pattern blocks are respectively inserted into a wavy bottom and a wavy head. The side pattern block is a d-shaped composite block formed by three polygonal three-dimensional surfaces with different heights, angles and shapes, so that rigidity difference is reduced, turning stability and ground grabbing performance are improved, and the weight of the side pattern block is rationalized. The tire shoulder pattern block consists of a bending front part and a strip-shaped rear part, wherein a plurality of outer layer claws are lapped on the inner layer wall of the rear part, parameters of the inner layer wall and the outer layer claws are optimized, the bending support and the stress rebound capability are improved, the bending stability of the tire is improved, and the unstable feeling is reduced. The tire shoulder pattern blocks are cut into two independent pattern blocks, the cutting distance and the cutting position are limited, the performance advantages of the tire shoulder pattern blocks are maintained, the rigidity is properly reduced, the stress rebound capability and the edge components are increased, and the ground grabbing performance is improved.

Description

Tread pattern of bicycle tire

Technical Field

The invention relates to the field of bicycle tires, in particular to a tread pattern of a bicycle tire.

Background

The light weight is a technical development trend in recent years in the bicycle industry, particularly in the field of high-grade bicycles, the light weight requirement on the whole bicycle and accessories thereof is high, the riding performance is affected, and the high added value is realized.

In order to reduce weight, the conventional lightweight bicycle tire is designed with thinner and shallower patterns on the tread, as shown in fig. 1, the conventional lightweight bicycle tire is generally configured with a thin pattern 10' in a central region C ' of a tread 1' to reduce weight of the tire, so as to seek lower rolling resistance and better endurance, and shoulder blocks 20' with larger ground contact area are configured in shoulder positions in two side regions S ' of the tread to ensure basic over-bending grip and safety requirements of various road conditions.

The shoulder block 20 'of conventional design has a large pattern volume, high rigidity and large difference from fine grain in the central region of the tread, and when the tire goes straight, turns over or goes over and turns back straight, a large drop is generated at the moment of ground contact surface switching, which easily causes unstable handling of a rider, and the over-bending grip is insufficient and the stability is also poor, so that the side block 30' is added between the fine pattern 10 'and the shoulder block 20' for assisting the transition of the fine pattern 10 'and the shoulder block 20'.

However, the above design still has the following drawbacks:

Firstly, the increase of the side pattern blocks 30 'can reduce the rigidity difference when the straight line rotates to pass through the curve to a certain extent, but the side pattern blocks 30' of the conventional design are all regular polygonal blocks, the edge components are limited to polygonal grounding surfaces, the grip performance of the curve is still insufficient, and the effect of relieving the instant drop feel of the switching between the straight line and the curve is not obvious;

Secondly, in order to provide sufficient over-bending supporting capability, the conventionally designed shoulder pattern block 20 'is usually a large-volume pattern block and is matched with an inclined outer side wall 21' to be designed, the outer side wall 21 'extends obliquely at a large angle along the outer side of the shoulder pattern block 20', the shoulder supporting capability during over-bending is improved by increasing the volume of the shoulder pattern block 20', but the rigidity is greatly enhanced, so that the shoulder pattern block 20' is not easy to deform due to stress and cannot sufficiently grip a road surface, insufficient over-bending gripping capability is easily caused, and simultaneously too fast rebound during over-bending grounding is possibly caused, so that the tire is unstable when over-bending returns to straight running;

finally, the addition of the side blocks 30 'and the bulk shoulder blocks 20' both negatively impact the weight reduction of the tire, leaving room for improvement.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a tread pattern of a bicycle tire, which can balance the rigidity of the tread, improve the over-bending stability and realize the weight reduction of the tire.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The tread pattern of the bicycle tire comprises a central area and side areas positioned at two sides of the central area, wherein the central area is provided with a thin pattern, shoulder pattern blocks distributed at intervals along the circumferential direction of the tire are arranged at the outer edge positions of the side areas, side pattern blocks distributed at intervals along the circumferential direction of the tire are arranged at the inner edge positions of the side areas, the circumferential positions of the side pattern blocks are positioned between two adjacent shoulder pattern blocks, the thin pattern extends from the central area to the positions between the two adjacent side pattern blocks in each circumferential direction in the side area and is terminated at the axial inner ends of the shoulder pattern blocks, so that the two axial outer sides of the thin pattern are wavy extending along the circumferential direction of the tire; the side pattern block is a composite block formed by combining a plurality of polygonal three-dimensional surfaces; the tire shoulder pattern block consists of a bending front part and a strip-shaped rear part.

Further, the side pattern block is a d-shaped composite block formed by combining three polygonal three-dimensional surfaces with different heights, different angles and different shapes, the arc end of the d-shape points to the center line of the tread, and the extending direction of the straight line end of the d-shape points to the rolling direction of the tire.

Further, the side pattern block is a composite block consisting of a short boss, a high boss and an inclined block, wherein the short boss is positioned at the inner side of the axial position of the side pattern block to form a front half section area of a d-shaped arc end; the high boss is connected with the rear end of the low boss to form a rear half section area of the d-shaped arc end and a rear half section area of the straight line end; the oblique block is positioned at the axial outer side of the side pattern block, and is connected with the axial outer side of the short boss and the front end of the high boss to form a front half section area of a d-shaped straight line end, and the upper surface of the oblique block is obliquely reduced from the radial height of the high boss to the radial height of the short boss and gradually sealed to the tread base so as to form an inclined surface in the forward tire rolling direction.

Further, the radial height of the short boss is 40% -60% of the radial height of the high boss, the circumferential length of the short boss is 40% -60% of the circumferential length of the side pattern block, the included angle between the inclined block and the tread base is 15 ° -25 °, and the upper surface area of the short boss and the upper surface area of the inclined block are smaller than the upper surface area of the high boss.

Further, the bending front part is inclined downwards from the inner side of the axial position to the outer side of the axial position, the strip-shaped rear part is connected to the downward inclined tail end of the bending front part, and the grounding area of the shoulder pattern block is 2-4 times of that of the side pattern block.

Further, the elongated rear portion has a circumferential length greater than a circumferential length of 65% of the shoulder blocks.

Further, the axially outer side of the strip-shaped rear part is provided with an inner layer wall which is obliquely downward along the radial direction of the tire, and the inner layer wall forms an included angle of 5-12 degrees with the radial direction of the tire.

Further, 3 outer layer claws are lapped on the surface of the inner layer wall at intervals, the upper end face of each outer layer claw is an outer layer wall which is obliquely downward along the radial direction of the tire, the outer layer wall forms an included angle of 30-50 degrees with the radial direction of the tire, the outer layer wall is in an isosceles trapezoid shape, the long side of the outer layer wall is lapped on the inner layer wall, and the short side of the outer layer wall is a connecting line of the outer layer wall and the tread base; the two side surfaces of the outer layer claw are triangular supporting surfaces.

Further, a thin groove is formed in the long-strip-shaped rear portion, and the thin groove is a long-strip-shaped groove extending along the circumferential direction of the tire.

Further, the shoulder block is divided into two independent blocks along the tire axial direction, the division part penetrates through the strip-shaped slot, and the circumferential division distance of the division part is smaller than or equal to 2mm.

After the technical scheme is adopted, compared with the background technology, the invention has the following advantages:

1. The axial outer sides of the fine patterns are designed to be wavy along the circumferential direction of the tire, and the side pattern blocks and the shoulder pattern blocks are respectively inserted into the wave tails and the wave heads of the wavy edges, so that the rigidity difference from the central area to the side area is reduced, and the rigidity of the tread is balanced;

2. The side pattern blocks are designed into d-like composite blocks formed by compositing short bosses, high bosses and inclined blocks, so that rigidity difference is further reduced, stability of straight running, bending or over-bending and straight running is improved, ground grabbing performance is improved, and weight of the composite blocks is rationalized;

3. The tire shoulder pattern blocks are 7-like pattern blocks formed by a bent front part and a long rear part, the outer side wall of the rear part is designed to be matched with a double-layer wall surface, the weight of the tire shoulder pattern blocks is reduced through reasonable design of inner-layer walls and outer-layer clamping claws, the bending support and the stress rebound capability are improved, the stability of the tire in straight running, bending or bending back and straight running is improved, and the unstable feeling is reduced;

4. cutting the tire shoulder pattern blocks into two independent pattern blocks, limiting the cutting distance and the cutting position, keeping the 7-shaped performance advantage, properly reducing the rigidity, increasing the stress rebound capability, further increasing the edge components and improving the ground grabbing performance.

Drawings

FIG. 1 is a tread pattern development schematic of a prior art bicycle tire;

FIG. 2 is a tread pattern development schematic of the tire of the present invention;

FIG. 3 is an enlarged schematic view of a single side block;

FIG. 4 is a left side view of the side block of FIG. 3;

FIG. 5 is an enlarged schematic view of a single shoulder block;

FIG. 6 is a cross-sectional view A-A' of FIG. 5;

FIG. 7 is an enlarged schematic view of FIG. 5 at B;

FIG. 8 is a schematic view of a cut shoulder block;

FIG. 9 is a schematic view of another cut shoulder block;

FIG. 10 is an expanded schematic view of another tread pattern of the tire of the present invention.

The reference numerals in fig. 1 are defined as follows: tread 1', center region C ', side regions S ', fine pattern 10', shoulder blocks 20', inclined outer sidewalls 21', side blocks 30';

The reference numerals in fig. 2-10 are explained as follows: tread 1, center region C, side regions S, sipe 10, shoulder block 20, front portion 21, rear portion 22, sipe 23, inner layer wall 24, outer layer claw 25, outer layer wall 251, support surface 252, long side 25a, short side 25b, waist side 25C, side block 30, short boss 31, high boss 32, oblique block 33.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Examples

As shown in fig. 2 to 10, the present invention discloses a tread pattern of a bicycle tire. In fig. 2, the vertical direction is set as the tire circumferential direction, the lateral direction is set as the tire axial direction, CL denotes the tread center line, and the arrow points in the tire rolling direction. The front and rear of the invention are defined according to the rolling direction of the tire, and the front grounding end is defined as the front end and the rear grounding end is defined as the rear end.

As shown in fig. 2, the tread 1 includes a center region C (region defined between two broken lines in fig. 2) symmetrical about a tread center line CL, and side regions S located on both sides of the center region C, the developed width W1 of which is 50% -65% of the tread developed total width TW. The fine pattern 10 is arranged in the center region C, the irregular shoulder blocks 20 and the side blocks 30 are arranged in the side regions S, the shoulder blocks 20 are arranged at the outer edge positions of the side regions and are distributed at intervals in the circumferential direction of the tire, the side blocks 30 are arranged at the inner edge positions of the side regions and are distributed at intervals in the circumferential direction of the tire, and the circumferential positions of the side blocks 30 are arranged between two adjacent shoulder blocks 20 so as to achieve both axial rigidity and circumferential rigidity.

The shoulder blocks 20 and the side blocks 30 can ensure sufficient grip performance at the shoulder, and at the same time, the fine pattern 10 is locally extended from the center region C to between two side blocks 30 adjacent in the inner circumference of the side region S and terminated at the axially inner ends of the shoulder blocks 20, so that the axially outer sides of the fine pattern 10 are in a wavy shape extending in the tire circumferential direction, with the tread center line CL as a reference, the portion of the wave directed to the outside of the tread center line CL is called a wave head, the portion of the wave directed to the inside of the tread center line CL is called a wave bottom, and the side blocks 30 and the shoulder blocks 20 are respectively interposed in the wave bottom and the wave head of the wavy edge, whereby the rigidity of the tread 1 can be balanced. The width W2 of the sipe 10 extending partially from the outer side in the axial direction of the center region C is set to 5mm to 10mm, further reducing the difference in rigidity from the center region C to the side regions S.

In order to improve the stability of the tire in straight running, through bending or through bending back straight running and reduce the rigidity difference between the fine pattern 10 and the shoulder pattern block 20, the side pattern block 30 is designed as a composite block which is formed by combining three polygonal three-dimensional surfaces with different heights, different angles and different shapes and is similar to a d shape, the arc end of the d shape points to the tread center line CL, and the extending direction of the straight end of the d shape points to the rolling direction of the tire.

Specifically, the side block 30 is formed by compounding a short boss 31, a tall boss 32 and an inclined block 33, the short boss 31 is located inside the axial position of the side block 30 to form a front half section area of a d-shaped arc end, the tall boss 32 is connected to the rear end of the short boss 31 to form a rear half section area of the d-shaped arc end and a rear half section area of a straight end, the upper surface of the inclined block 33 is an inclined surface in the forward tire rolling direction, and the inclined block 33 is located outside the axial direction of the side block 30 and connects the axial outside of the short boss 31 and the front end of the tall boss 32 to form a front half section area of the straight end of the d-shaped.

The radial height h1 of the short boss 31 is set to be 40% -60% of the radial height h2 of the high boss 32, the circumferential length L1 of the short boss 31 is set to be 40% -60% of the circumferential length L2 of the side pattern block 30, the setting position of the short boss 31, the radial height h1 and the circumferential length L1 are optimized, the inner end rigidity of the side pattern block 30 can be properly weakened, the tire is firstly grounded to the inner end short boss 31 with lower rigidity when the tire is rotated straight and bent, the rigidity difference from the thin pattern 10 to the side pattern block 30 is reduced, the edge component is increased, and the instant ground grabbing performance is improved. The height of the inclined block 33 is reduced from the radial height h2 of the high boss 32 to the radial height h1 of the low boss 31 and gradually sealed to the tread base, the included angle alpha between the inclined block 33 and the tread base is set to 15-25 degrees, the rigidity difference of the low boss 31 and the high boss 32 caused by the height fall can be balanced, three-dimensional edge components with different angles and different shapes are formed on the surface of the side pattern block 30, and the ground grabbing property is improved. The high boss 32 is the portion of the side block 30 having the highest height and the largest surface area, and allows the tire to be more smoothly switched from the low boss 31 of the side block 30 to the shoulder block 20.

Therefore, the short boss 31, the high boss 32 and the inclined block 33 in the side pattern block 30 are combined and arranged in a multi-surface complementary manner, so that on one hand, the rigidity difference from the central area C to the shoulder area S of the tire can be reduced, and the stability of straight running, turning, bending or straight running is improved; on the other hand, more three-dimensional change edge components are generated, so that the ground grabbing performance is improved; while rationalizing the weight of the side blocks 30 while ensuring the above-described optimum performance, the adverse effect on the weight reduction of the tire due to the addition of the side blocks 30 is reduced.

As shown in fig. 5, the shoulder block 20 is composed of a bent front portion 21 and an elongated rear portion 22, the bent front portion 21 is inclined downward from the inside of its axial position to the outside of its axial position, the length direction of the elongated rear portion 22 is the tire circumferential direction, and it is connected to the downward inclined end of the bent front portion 21, so that the shoulder block 20 is shaped like a "7" as a whole. The ground contact area of the shoulder block 20 is 2-4 times the ground contact area of the side block 30. The curved design of the front portion 22 assists in a smooth transition from the side blocks 30 to the rear portion 22 of the shoulder block 20 during ground contact. The circumferential length L3 of the rear portion 22 is greater than 65% of the total circumferential length L4 of the shoulder blocks 20, so that the shoulder blocks 20 have greater circumferential rigidity and high block strength, and sufficient overbending ground contact surface and supporting capability are ensured.

Preferably, the fine groove 23 is provided in the shoulder block 20, and the fine groove 23 is an elongated groove extending in the tire circumferential direction to appropriately promote gripping force and reduce weight.

In order to achieve both the support performance and the force rebound capability of the shoulder blocks 20, the outer side walls of the rear portions 22 of the shoulder blocks 20 are designed as double-wall surface collocations, particularly as shown in fig. 6 to 7. Firstly, the inner layer walls 24 extending downwards in a radial direction and inclined are uniformly arranged along the outer side wall of the tire shoulder pattern block rear part 22, the inner layer walls 24 and the tire radial direction form an included angle beta of 5-12 degrees, and the inner layer walls 24 with smaller inclined angles are arranged, so that the volume of the pattern block and the weight of the tire are not greatly increased, and the tire shoulder pattern block 20 is not excessively strengthened, so that the tire shoulder pattern block can be deformed under proper stress. Secondly, in order to achieve both the supportability and the force-bearing rebound ability of the shoulder pattern blocks 20, a plurality of outer layer claws 25 are overlapped on the surface of the inner layer wall 24 at intervals, the upper end surface of each outer layer claw 25 is provided with an outer layer wall 251 which is obliquely downward along the radial direction of the tire, and the included angle gamma between the outer layer wall 251 and the radial direction of the tire is 30-50 degrees; the outer layer wall 251 has an isosceles trapezoid shape, the long side 25a thereof overlaps the inner layer wall 24, the short side 25b thereof is the line connecting the tread base, and both sides thereof are triangular support surfaces 252. The radial included angle gamma of the outer layer wall 251 is larger, so that superior support performance at the tire shoulder can be provided, meanwhile, the design of the isosceles trapezoid surface layer 251 with the inner short and the outer long and the stable triangular support surface 252 is matched, the overstretched support performance of the tire shoulder pattern block 20 is further improved, meanwhile, the tire shoulder pattern block has the stress rebound capability, the stability of the tire in straight running, over-bending or over-bending and back straight running is improved, and the unstable feeling is reduced.

If the number of the outer layer claws 25 of the inner layer wall 24 is too small, the supporting and rebounding effects cannot be fully exerted; if the number of the outer layer claws 25 of the inner layer wall 24 is too large, the shoulder blocks 20 are suppressed from being deformed by force and the tire weight is increased, so that the number of the outer layer claws is preferably 3 in this embodiment.

As shown in fig. 10, in order to reduce the weight of the tire and to improve the grip, the shoulder block 20 is divided into two independent blocks in the tire axial direction, and as shown in fig. 8 and 9, two divided embodiments of the shoulder block 20 are shown, the circumferential divided distance W3 of both blocks is kept within 2mm (i.e., the circumferential divided distance W3 is less than or equal to 2 mm). The tire weight can be reduced by cutting the tire shoulder pattern blocks 20, and the two independent pattern blocks after being cut keep a narrow circumferential distance W3, so that the overall tire shoulder pattern blocks 20 still keep a 7-shaped form, on one hand, the performance advantage of the 7-shaped form is kept, on the other hand, the rigidity is properly reduced, and the stress rebound capability is increased. The split positions all pass through the slots 23, so that the two opposite edges of the two independent pattern blocks are provided with open slots, the edge components can be further increased, and the ground grabbing performance is improved.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The utility model provides a tread decorative pattern of bicycle tire, tread includes central region and is located the side region of central region both sides, central region is provided with the thin decorative pattern, the outward flange position of side region is equipped with the shoulder decorative pattern piece along tire circumference interval distribution, the inward flange position of side region is equipped with the side decorative pattern piece along tire circumference interval distribution, the circumference position of side decorative pattern piece is located between two adjacent shoulder decorative pattern pieces, its characterized in that: the fine patterns extend from the central area to between two circumferentially adjacent side pattern blocks in the side areas and terminate at the axially inner ends of the shoulder pattern blocks, so that the two axially outer sides of the fine patterns are wavy extending along the circumferential direction of the tire; the side pattern block is a composite block formed by combining a plurality of polygonal three-dimensional surfaces; the tire shoulder pattern block consists of a bending front part and a strip-shaped rear part;

the side pattern block is a d-shaped composite block formed by combining three polygonal three-dimensional surfaces with different heights, different angles and different shapes, the arc end of the d shape points to the center line of the tread, and the extending direction of the straight line end of the d shape points to the rolling direction of the tire;

the side pattern blocks are composite blocks consisting of short bosses, high bosses and inclined blocks;

the bending front part is inclined downwards from the inner side of the axial position to the outer side of the axial position, the strip-shaped rear part is connected to the downward inclined tail end of the bending front part, and the grounding area of the tire shoulder pattern block is 2-4 times of that of the side pattern block;

the axial outer side of the strip-shaped rear part is provided with an inner layer wall which is obliquely downward along the radial direction of the tire, and the inner layer wall forms an included angle of 5-12 degrees with the radial direction of the tire;

3 outer layer clamping claws are lapped on the surface of the inner layer wall at intervals, the upper end face of each outer layer clamping claw is an outer layer wall which is obliquely downward along the radial direction of the tire, and the outer layer wall forms an included angle of 30-50 degrees with the radial direction of the tire;

The short boss is positioned on the inner side of the axial position of the side pattern block to form a front half section area of the d-shaped arc end; the high boss is connected with the rear end of the low boss to form a rear half section area of the d-shaped arc end and a rear half section area of the straight line end; the oblique block is positioned at the axial outer side of the side pattern block, and is connected with the axial outer side of the short boss and the front end of the high boss to form a front half section area of a d-shaped straight line end, and the upper surface of the oblique block is obliquely reduced from the radial height of the high boss to the radial height of the short boss and gradually sealed to the tread base so as to form an inclined surface in the forward tire rolling direction.

2.A tread pattern for a bicycle tire as in claim 1, wherein: the radial height of the short boss is 40% -60% of the radial height of the high boss, the circumferential length of the short boss is 40% -60% of the circumferential length of the side pattern block, the included angle between the inclined block and the tread base is 15 ° -25 °, and the upper surface area of the short boss and the upper surface area of the inclined block are smaller than the upper surface area of the high boss.

3. A tread pattern for a bicycle tire as in claim 1, wherein: the elongated rear portion has a circumferential length greater than 65% of the circumferential length of the shoulder blocks.

4. A tread pattern for a bicycle tire as in claim 1, wherein: the outer layer wall is in an isosceles trapezoid shape, the long side of the outer layer wall is lapped on the inner layer wall, and the short side of the outer layer wall is a connecting line between the outer layer wall and the tread base; the two side surfaces of the outer layer claw are triangular supporting surfaces.

5. A tread pattern for a bicycle tire as in claim 1, wherein: the long strip-shaped rear part is provided with a thin groove, and the thin groove is a long strip-shaped groove extending along the circumferential direction of the tire.

6. A tread pattern for a bicycle tire as in claim 5, wherein: the tire shoulder pattern block is divided into two independent pattern blocks along the axial direction of the tire, the division part penetrates through the strip-shaped fine groove, and the circumferential division distance of the division part is smaller than or equal to 2mm.