CN110901301A

CN110901301A - A bicycle tubeless tire, wheel and bicycle thereof

Info

Publication number: CN110901301A
Application number: CN201911298895.0A
Authority: CN
Inventors: 田志伟; 原五星; 赵彬
Original assignee: JIANGSU SEYOUN TIRE CO Ltd
Current assignee: JIANGSU SEYOUN TIRE CO Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-03-24

Abstract

The invention discloses a bicycle vacuum tire, a bicycle wheel and a bicycle thereof, and belongs to the field of bicycle wheels. The vacuum bicycle tire comprises a tread rubber layer, a cord fabric layer and a bead core, wherein the cord fabric layer is supported by the bead core, and the bead core corresponds to the tire lip part of the vacuum tire; the tread rubber layer is arranged on the outer side of the cord fabric layer to form a tire crown; the bead core is formed by continuously encircling at least 3 circles by a single-strand core wire, and the side, close to the bead heel, of the bead core is encircled by the single-strand core wire for not less than 2 circles; rubber layers are distributed at the bottom and the outer part of the tire lip. The bicycle vacuum tire in this scheme, the difficult segment difference that takes place of bead core can provide sufficient holding power for a long time, has improved the air protection of vacuum tire.

Description

Bicycle vacuum tire, wheel and bicycle thereof

Technical Field

The invention relates to the technical field of bicycle wheels, in particular to a bicycle vacuum tire, a bicycle wheel and a bicycle.

Background

Bicycles are two-wheeled small land vehicles. The bicycle is a green and environment-friendly vehicle and also a tool capable of experiencing riding pleasure.

The existing bicycle tire mainly comprises three structures: common bicycle tires comprising an inner tube and an outer tire, solid tires currently used in some shared bicycles, and vacuum tires without inner tubes.

The bicycle vacuum tire is a high-end product of the tire used by the bicycle, and has higher requirements on the air tightness and the easiness in assembly of the tire. As is well known, vacuum tires are applied more in the field of automobiles and have better effects, and electric vehicles also begin to adopt the vacuum tires, but because the weight difference between the automobile and the electric vehicle and that between the bicycle are larger, the wheel structure is completely different from that of the bicycle wheel, so the existing vacuum tires cannot be applied to the bicycle.

The air tightness is a great problem faced by bicycles, and because the weight of automobiles and electric vehicles is large and the tires are thick and heavy, the air tightness has a better effect on maintaining the pressure of the tires under the gravity of the automobiles and the electric vehicles. However, for bicycles, the requirement for light weight is high, the bicycle tire cannot be too heavy and too thick, and because of its light weight, it is difficult to improve the sealing by its own weight to prevent air leakage. Particularly, for bicycles with high requirements for light weight, the bicycle is more difficult to be combined with a vacuum tire to meet the requirement of air tightness. Although the prior vacuum tire can still be normally used after being used for a certain time, the prior vacuum tire can be inflated once in less than one month, which is troublesome and has a short airtight period. Therefore, how to improve the air tightness of the vacuum tire is a big problem to be faced at present.

With respect to the vacuum tire technology, there are solutions disclosed in the prior art, such as a bicycle vacuum tire and a bicycle (application No. 201821025765.0), which are only mentioned to the vacuum tire in general and described from the external mounting structure, but there is no description about the specific structure of the vacuum tire and no suggestion on how to design the related air tightness.

In addition, for a high-end bicycle, the requirements for speed and light weight are high, and the vacuum tire can run at high speed due to the unique performance, but the weight of the vacuum tire is also a great problem to be faced at present. When a vacuum tire is used to replace the existing inner tube and outer tire, the tire seems to be lighter due to the lack of the inner tube, but in fact, the tire wall and the tire tread of the vacuum tire are much thicker in order to ensure the sealing and wear resistance of the bicycle, and the vacuum tire may be heavier if no better material and technology is available.

In order to achieve light weight, the materials are mainly improved greatly at present, and high-quality light materials are provided, so that the vacuum tire bicycle in the market is expensive.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defect of poor air tightness of a vacuum tire of a bicycle in the prior art, and provides the vacuum tire of the bicycle, a wheel and the bicycle. The bicycle vacuum tire in this scheme, the difficult segment difference that takes place of bead core can provide sufficient holding power for a long time, has improved the air protection of vacuum tire.

Furthermore, the invention also provides a bicycle wheel which adopts the vacuum tire rim, can be matched with a vacuum tire for use and has a better air-retaining effect.

Furthermore, the invention also provides a bicycle which can be stored or used for a long time after being inflated for one time without frequent inflation.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a vacuum bicycle tire, which comprises a tread rubber layer, a cord fabric layer and a bead core, wherein the cord fabric layer is supported by the bead core, and the bead core corresponds to the tire bead part of the vacuum tire; the tread rubber layer is arranged on the outer side of the cord fabric layer to form a tire crown; the method is characterized in that: the bead core is formed by continuously encircling at least 3 circles by a single-strand core wire, and the side, close to the bead heel, of the bead core is encircled by the single-strand core wire for not less than 2 circles; rubber layers are distributed at the bottom and the outer part of the tire lip.

As a further improvement of the invention, the single-strand core wire is a single-strand steel wire or a single-strand fiber wire.

As a further improvement of the invention, the bead core comprises 3 to 6 turns of single-strand core wires.

As a further improvement of the invention, the bead core has 3 or 6 turns, and the number of the single-strand core wires is gradually reduced towards the side far away from the bead heel.

As a further improvement of the invention, the end of the single-stranded core wire has an overlapping margin of 20-150 mm relative to the starting end, and further 30-120 mm can be selected.

As a further improvement of the invention, the diameter size of the single-stranded core wire is 0.6-1.0 mm.

As a further improvement of the invention, the single-strand core wires are jointed or have a spacing, and the spacing is not more than 3 mm.

As a further improvement of the invention, the cross section of the single-stranded core wire is circular, or elliptical, or quadrilateral, or a special-shaped structure formed by a straight line and an arc line.

As a further improvement of the invention, the tire bead of the vacuum tire is composed of a convex section C1 and a concave arc section C2 which is concave in the cross-sectional structure, the bottom of the tire bead is a bead heel with a linear structure, and the bead heel, the convex section C1 and the concave arc section C2 are sequentially connected to form a matching part with a wheel rim; the mating portion is covered with a rubber layer.

As a further improvement of the invention, the inclined included angle between the bead heel of the bead and the X direction is 3-20 degrees.

As a further improvement of the invention, the convex section C1 is a convex arc structure, the intersection point of the tangent line of the outermost end in the Y direction and the extension line of the inclined heel is an RD point, the distance d2 from the inner wall of the bead core to the axis of the vacuum tire is not less than the dimension d1 from the RD point to the axis of the vacuum tire, and the difference is 0-1.2 mm.

As a further improvement of the invention, the inner side or the outer side of the cord fabric layer is provided with an air-retention rubber layer.

As a further improvement of the invention, the air-retention rubber layer is arranged outside the cord fabric layer and covers the tire side part or forms full-face rubber to cover the tire side part and the tire lip.

As a further improvement of the invention, the air-retention rubber layer is arranged on the inner side of the cord fabric layer to form an inner liner which is folded outwards around the bead core.

As a further improvement of the present invention, a bead protection rubber is provided on the outer side of the bead of the vacuum tire, and covers the folded-back end portion of the inner liner.

As a further improvement of the invention, the air-retention rubber layer is a tread rubber layer in the tire tread area, and the tire tread is formed by gluing wear-resistant rubber blocks on the tread rubber layer.

The invention discloses a bicycle wheel, which comprises a hub and a vacuum tire, wherein the vacuum tire is the vacuum tire, and the vacuum tire is matched with a rim of the hub.

As a further improvement of the invention, the rim comprises a rim connecting part in the middle and rim mounting parts at two ends, the rim mounting parts are mainly formed by sequentially connecting a sealing section L1, a sealing section L2 and a pressing section L3, an included angle of 90-110 degrees is formed between the sealing section L1 and a mounting surface of the sealing section L2, and the pressing section L3 is recessed towards the inner side of the sealing section L2 to form a step; the heel of the vacuum tire is matched with a mounting surface of the sealing section L1, the convex section C1 is matched with a mounting surface of the sealing section L2, and the concave arc section C2 is matched with a mounting surface of the pressing section L3.

As a further improvement of the invention, the width w of the tire bead is not more than the width h of the rim mounting part, and the difference is 0-1 mm.

As a further improvement of the invention, the rim also comprises an inner rim airtight ring which is arranged at the rim connecting part and used for sealing the rim, blocking the spoke holes and avoiding air leakage from the spoke holes.

The invention relates to a bicycle, and the wheels of the bicycle adopt the wheels. The bicycle is composed of a frame and two wheels with vacuum tires, and can be used for a long time.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the bicycle vacuum tire, the bead core is formed by continuously encircling the single-stranded core wire for at least 3 circles, and the bead core is encircled by the single-stranded core wire for at least 2 circles on the side close to the bead heel, so that the tire has a good air-retention effect, can provide enough supporting force for a long time, and prolongs the service life of the vacuum tire.

(2) The bicycle vacuum tire controls the distance difference between the RD point and the bead core, and limits the position of the bead core; and the heel in the tire bead is limited in an inclined way, the structural arrangement of the tire bead is limited, and the air retention of the tire bead is improved from multiple aspects.

(3) The bicycle wheel adopts the vacuum tire wheel rim, improves the structure of the vacuum tire wheel rim and the adaptability of the vacuum tire, and can still have better air retention after being used for a long time. The bicycle adopting the wheel has light weight, does not need frequent inflation and has strong practicability.

Drawings

FIG. 1 is a schematic view of a vacuum tire;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic view of the structural distribution of the bead;

FIG. 4 is a schematic view of the location dimensions of the RD point and the bead core;

FIG. 5 is a schematic view of a full-face cement structure of a unitary structure;

FIG. 6 is a schematic view of a side rubber and a tread rubber layer engaging structure;

FIG. 7 is a schematic representation of an embodiment of the innerliner and ply;

FIG. 8 is a schematic view of another embodiment of a ply;

FIG. 9 is a schematic view of a construction of a full-face encapsulated bead;

FIG. 10 is a schematic view of the composition of the tread rubber layer and the tread cap;

fig. 11 is a schematic view of the structure of the rim.

The reference numerals in the schematic drawings illustrate: 10. a crown; 11. tire shoulders; 12. a sidewall portion; 13. a fetal lip; 14. a heel of a fetus; 20. a tread rubber layer; 21. side glue; 30. an airtight layer; 40. a ply layer; 41. a single layer of screen; 42. an inner layer of screen cloth; 43. an outer layer screen layer; 50. a bead core; 51. a single-stranded core wire; 60. a seam allowance protective adhesive; 70. a security thread.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

With reference to fig. 1, the vacuum bicycle tire of the present embodiment includes a tread rubber layer 20, a ply 40 and a bead core 50, wherein the ply 40 is supported by the bead core 50, and the bead core 50 corresponds to the bead lip 13 of the vacuum tire. A tread band 20 is disposed outwardly of the ply 40 to form the tread cap 10.

The tread rubber layer 20 covers the middle area of the cord fabric layer 40 and forms a tire crown 10, and the tire shoulder 11 is the part where the two ends of the tire crown 10 are connected with the cord fabric layer 40. In this embodiment, the tread rubber layer 20 may extend to cover the sidewall 12, and form rubber layers at the bottom and the outer side of the bead 13, that is, form a rubber film at the bottom and the outer side of the sidewall 12 and the bead 13, so as to provide a certain air tightness and achieve the air retention effect.

The bead core 50 in this embodiment is formed by continuously winding the single cord 51 for at least 3 turns, and the bead core 50 is wound by the single cord 51 for not less than 2 turns on the side close to the bead heel 14.

In the currently adopted tire, most of bead cores are formed by one or more strands of steel wires, but most of the steel wires are independently connected to form a steel wire ring, after the tire is used for a period of time, the end part of the steel wire ring is easy to have a segment difference, and the occurrence of the segment difference can greatly reduce the supporting force of the steel wire ring, so that the sealing property between the tire and a rim is damaged, and the tire is easy to leak.

Because most of the prior tires are of inner and outer tire structures, the outer tire basically has no air-retaining requirement, so whether the bead core has a step difference or not has little influence on the tire. However, for a vacuum tire, this problem will seriously affect the service life of the tire.

With reference to fig. 2, in the present embodiment, the bead core 50 is formed by continuously winding the single-stranded core 51 for at least 3 turns, and also forms a three-turn structure, because the single-stranded core 51 is continuous, there is only one joint in the present embodiment, and at the position of the joint, the other two turns are still continuous, so that even if a step occurs, the overall structural strength is not affected, so as to provide better air retention and prolong the service life of the tire.

Further, in the present embodiment, it is required that the bead core 50 is surrounded by the single cord 51 for not less than 2 turns on the side close to the bead heel 14, and in the cross-sectional structure of fig. 2, the single cord 51 has two turns on the left and right, which are formed by 1 single cord 51.

One function of the bead core 50 is to press the bead heel surface against the rim, so that a seal is formed between the rubber layer on the bead heel and the mounting surface of the rim, and the multi-turn structure of the single-strand core 51 can form a larger pressing surface on the side close to the bead heel 14, thereby improving the sealing effect.

As an embodiment of the single-strand core wire 51, it can be a single-strand steel wire or a single-strand fiber wire, and its diameter is generally 0.6-1.0 mm, for example, 0.7m, 0.75mm, 0.85mm, 0.95mm, etc.

After the vacuum tire is formed, the multi-turn single core wires 51 can be attached to each other in the cross-sectional structure, and the structure needs to be processed to fix the multi-turn single core wires 51 so as to avoid the mutual offset.

In some embodiments, there may be some gap between the turns of the single-strand core 51. Because the single-stranded core wires 51 are simply fixed, the rubber body is filled between the multiple circles of the single-stranded core wires 51 after vulcanization processing, so that a certain distance exists between the single-stranded core wires 51. Preferably, the distance is controlled to be within 3 mm. Preferably, the spacing may be about 1 mm.

The cross-sectional structure of the single-stranded core wire 51 may be a circle, an ellipse, a quadrangle, or a special-shaped structure formed by a straight line and an arc line, such as a special-shaped triangle (a large arc line transition is adopted at a joint of side lines), a special-shaped quadrangle (in which two opposite sides are arc lines), and the like, without specific limitation. In fig. 9, a schematic diagram of an embodiment in which a gap is formed between a plurality of turns of the single-strand core wire 51 and the single-strand core wire 51 has a quadrangular structure is shown.

The "single strand" referred to in the present embodiment means that the bead core 50 is regarded as one strand of the multi-turn structure, and the single strand core 51 may be a single thread or a combination of multiple threads. For example, a single strand of steel wire, which may be formed from one steel wire; or may be formed from a plurality of filaments, for example three filaments twisted to form a single strand of steel.

When a fiber ring is adopted, the fiber ring can be Kevlar fiber; can be fiber with stronger tensile strength and high modulus, and the carbon fiber or aramid fiber is mutually entangled to form the twisted wire. The fiber loop is formed by combining a plurality of strands of fiber twisted wires to form a single-strand core wire.

As a further modification, the number of the single-strand wires 51 is gradually reduced toward the side away from the bead heel 14. For example, when 3 turns of the single-stranded core wire 51 are used, the bottom has 2 turns, the upper layer has 1 turn, and the base is located between the 2 turns to form an equilateral triangle structure. When 6 single-stranded core wires 51 are used, the bottom most portion has 3 turns, the middle portion has 2 turns, and the top layer has 1 turn, and likewise, an equilateral triangular structure is formed.

With the above structure, on one hand, the strength of the supporting force provided is considered, and on the other hand, at the joint position, a certain amount of overlap between the end and the beginning of the single-strand core 51 can be achieved. In the structure, because the bottom is large, the wire ends of the single-stranded core wires 51 which are overlapped at the excessive positions can have an accommodating space, and the cord fabric layer cannot be excessively expanded, so that enough space can be provided for accommodating the rubber layer, and the rubber layer cannot be too thin to play a role in air retention.

Further, the ends of the single-stranded core wires 51 may be butted. More preferably, the end of the single-stranded core wire 51 has an overlapping margin of 20 to 150mm with respect to the starting end, and within this range, it can be selected as required, for example, set to 30mm, 60mm, 100mm, 120mm, etc., without specific limitation. The joint of the bead core can be connected together by slurry cloth bundling or bonding and the like.

Referring to fig. 3, as an embodiment of a bead structure of a vacuum tire, a bead 13 of the vacuum tire is composed of a convex section C1 and a concave arc section C2, in a cross-sectional structure, the bottom of the bead 13 is a bead heel 14 in a linear structure, and the bead heel 14, the convex section C1 and the concave arc section C2 are connected in sequence to form a matching part with a rim, and the matching part is covered with a rubber layer. After installation, the rubber layer in the matching part is matched with the wheel rim to form a seal.

In practice, the heel 14 will generally be inclined with respect to the direction X, with its ends connected, preferably smoothly, to the raised segments C1, forming a single body. The convex section C1 may be an arc or a straight line section in the middle, and is not particularly limited. The concave arc section C2 is formed into a concave structure and is in transition connection with the convex section C1.

Preferably, the inclination angle of the heel 14 to the X direction is 3 ° to 20 °, and further, may be controlled to 8 ° to 15 °, for example, 10 ° or 13 °. The inclined included angle needs to be designed according to the rim.

In one embodiment, with reference to fig. 4, the convex segment C1 has a convex arc structure, the intersection point of the tangent line of the outermost end in the Y direction and the extension line of the inclined heel 14 is RD point, the distance d2 from the inner wall of the bead core 50 to the axis of the vacuum tire is not less than the dimension d1 from the RD point to the axis of the vacuum tire, and the difference is 0 to 1.2 mm.

In the case of the determined shape of the tire lip, the position of the RD point is determined, and the smaller the difference between d2 and d1, the smaller the thickness of the rubber layer which can be accommodated, and the rubber film plays a role in sealing. Also, due to the heel tilt, if d2 is less than d1, there will be insufficient rubber to contain enough rubber to seal.

In one embodiment, the difference between d2 and d1 is 0-0.5 mm, for example, the inclined angle is 8 degrees, and the difference between d2 and d1 is 0.3mm, on the basis that the inclined angle of the heel 14 to the X direction is 5-20 degrees; the included angle of inclination is 10 deg., and d2 is equal to d 1.

Further, a gas-retaining rubber layer inside or outside the ply 40.

In one embodiment of the air-retention rubber layer, it is provided outside the carcass layer 40 so as to cover the sidewall 12.

With reference to fig. 5, it can be understood that the sidewall 12 is provided with the side rubber, and the side rubber 21 can be formed at the same time as the tread rubber layer, i.e., as an integral structure with the tread rubber layer 20, and processed at the same time. The side rubber covers the sidewall and bead side portions, and the bead heel at the bead bottom. Further, the tread rubber layer 20 corresponding to the tread cap may be made of an additional rubber layer to enhance its wear resistance.

In connection with fig. 6, it is also possible to provide the side glue 21 separately. The requirement of the tire crown part on wear resistance is high, the requirement of the side part on crack resistance and air retention is high, and different materials can be used for matching and processing in the mode to form a better scheme. In this structure, the bead protection rubber 60 at the bead portion may be integrated with the side rubber 21 or may be additionally processed, and the bead protection rubber 60 is mainly located at the bead portion below the safety line 70.

As another embodiment of the air-retention rubber layer, the air-retention rubber layer is provided inside the ply 40 to form the inner liner 30, and the inner liner 30 is folded back outward around the bead core 50. The airtight layer 30 can ensure good sealability.

In order to better match the structure of the inner liner, a bead protection rubber 60 is provided on the outer side of the bead 13 of the vacuum tire, and the bead protection rubber 60 covers the folded end of the inner liner 30.

In the present embodiment, when the inner liner is wrapped outward, the end portion of the inner liner 30 is folded back to the outside of the bead lip 13 around the bead core 50 and covered with the bead filler 60. The bead filler 60 extends upward from the end of the bead heel 14 to close the end of the innerliner between itself and the carcass ply, improving air tightness.

Further, the bead protection rubber 60 at the bead portion forms a convex section C1 and a concave arc section C2 for fitting with the rim. After the installation, can form the multiple spot seal in the area of child heel 14, protruding section C1 and concave arc section C2 of indent, better guarantee the gas tightness.

As an embodiment of the air barrier, it may be made of the same material as the bead protection rubber, and may be made of rubber, such as butyl rubber, or may be made by embedding rubber in fiber or textile. Embedding means that the gaps between the fibers or textiles are filled with rubber.

In this embodiment, the tread rubber layer 20 covers the middle region of the ply layer 40 to form a crown 10, and the tire shoulder 11 is the part where the two ends of the crown 10 are connected with the ply layer 40. In this embodiment, since the tread rubber layer 20 is only provided at the crown and shoulder portions, the portion between the bead and the shoulder of the tire has no tread rubber, that is, the area of the sidewall portion 12 has no tread rubber added again, so that the tire weight can be reduced. The ply 40 itself is sized by embedding a gel in the woven material or fibers, and the ply 40 itself is of a gel material.

Since the sidewall portion has no tread rubber, the overall mass is reduced, but its air retention may be problematic, which is one reason why many vacuum tires are currently large in mass. In this embodiment, bead protection rubber 60 is disposed at the bead 13, and the bead protection rubber 60 may be rubber, so that after installation, a better sealing effect can be achieved between the rubber and the rim.

As an embodiment of the crown 10, the shoulders 11 are formed at the ends thereof, and the thickness of the shoulders 11 may be greater than the thickness of the crown 10, at least in the central region of the crown. In this structure, can form great contact surface, form flat structure, increase the power of grabbing.

Various tread patterns may be formed in the tread cap 10 during use, and these patterns may be used to increase friction, drainage, etc. The pattern to be provided may be a continuous pattern or a discontinuous pattern, and the pattern is provided symmetrically along the center line in the circumferential direction of the tire.

Referring to fig. 7, as a specific embodiment of the ply, the ply 40 is formed by a single layer of cord fabric 41 folded around bead cores 50 at both ends, and the ends of the single layer of cord fabric 41 form a partial overlapping area to form a complete loop. In the two end positions, the ply 40 comprises two layers of cords 41, and in the central overlapping region, three layers of cords 41. The ply 40 itself is sized by embedding a gel in the woven material or fibers, and the ply 40 itself is of a gel material.

In connection with fig. 8, as another embodiment of the ply, two layers of cords are folded back around each other and are superposed. Wherein, the both ends of the inner layer cord layer 42 are folded back upwards around the bead core 50, the both ends of the outer layer cord layer 43 are folded back downwards around the bead core 50, and the inner layer cord layer 42 is wrapped while surrounding the bead core, and in the structure, the cord layers contained in the cord fabric layer are two layers, and 4 layers are formed in the bead lip area. The inner liner is arranged in the same arrangement as the inner layer of screen 42, and the ends of the outer layer of screen 43 are pressed and covered.

It should be noted that when two layers of cords are used, the ends of the two layers of cords generally do not extend beyond the bead area for weight reduction purposes, thereby avoiding an increase in the thickness of the sidewall portion 12.

When a full-face rubber structure is employed, the tread rubber layer 20 can have a variety of structures. Referring to fig. 9 and fig. 10 (a), a schematic view is shown in which the air-retention rubber layer and the tread band are all made of the tread rubber layer 20, and the rubber material outside the carcass layer is the same.

In order to increase the friction and enhance the aging resistance of the tire, the crown portion of the tire may have a certain cavity during processing, so that the tire can be glued with the wear-resistant rubber block, as shown in fig. 10 (b). The rubber material adopted by the wear-resistant rubber block has the performances of ageing resistance and tearing resistance, and the existing tire crown rubber material can be adopted. The wear-resistant rubber blocks are embedded into the tread rubber layer 20, so that the wear-resistant rubber layer serves as a tire crown, and the wear resistance of the tire is improved.

Fig. 10 (c) shows another embodiment in which the crown portion is completely replaced with an abrasion resistant rubber, which may be more practical.

On the basis of the vacuum tire, the invention also provides a bicycle wheel.

As an embodiment, the wheel comprises a hub and a vacuum tyre, wherein the vacuum tyre is the vacuum tyre in the above embodiments or the combination thereof. The adopted hub comprises a spoke and a rim which are connected, and the vacuum tire is matched with the rim of the hub to meet the use requirement.

Further, referring to fig. 11, the rim 80 includes a rim connecting portion 81 in the middle and rim mounting portions 82 at both ends, the rim connecting portion 81 and the rim mounting portions 82 are integrally formed, and the outer side of the rim connecting portion 81 is connected to the spoke. The rim mounting part 82 is mainly formed by sequentially connecting a sealing section L1, a sealing section L2 and a pressing section L3, and an included angle of 90-110 degrees is formed between the sealing section L1 and the mounting surface of the sealing section L2 and is in transition connection through an arc. For example, if the sealing section L1 has a certain upward inclination angle, the sealing section L2 may be vertical, so that an obtuse angle can be formed. The specific angle can be matched with the inclined included angle of the bead heel, and the specific angle and the inclined included angle can be the same or matched according to a corresponding relation, so that the sealing effect is achieved.

The pressing section L3 is recessed toward the inside of the sealing section L2 to form a step. The width of the step relative to the sealing section L2 is no less than 1/6 the width of the sealing section L1.

The heel 14 of the vacuum tire is matched with the mounting surface of the sealing section L1, the convex section C1 is matched with the mounting surface of the sealing section L2, and the concave arc section C2 is matched with the mounting surface of the stitching section L3. By utilizing the structure, three sections of sealing are formed, and the sealing surfaces are mutually matched by utilizing the concave-convex structure of the structure, so that the air tightness effect is greatly improved.

The width w of the bead 13 is not greater than the width h of the rim mounting part 82, and the difference is 0-1 mm, so that the tire is prevented from knocking over.

In addition, the rim 80 further comprises an inner rim air-tight ring 83, the inner rim air-tight ring 83 being arranged at the rim connecting portion 81 for sealing against the rim 80. Spokes are mounted on the rim connecting part 81, and the spoke mounting holes can be blocked through the inner rim airtight ring 83 to form sealing.

Comparative example:

in the already published patent "pneumatic tires, wheels and bicycles" (application No.: 201820668479.X), the following solutions are specifically disclosed: the pneumatic tire comprises a cord layer and a rubber layer coated on the cord layer, wherein two ends of at least one cord fabric forming the cord layer are respectively folded back to form a steel wire ring wrapping a bead, the steel wire ring extends upwards along a bead, the cord fabric is symmetrically overlapped at a tire crown along an equatorial plane, 3-4 layers of cord yarns are arranged at the tire crown, and 3 layers of cord yarns are arranged at the bead. The pneumatic tire can reduce the cracking probability of the rubber material on the surface layer of the tire bead, improve the durability of the tire, control the increase of the weight of the tire, and ensure the light weight, comfort and labor saving of the bicycle.

It can be seen from the patent that although the bead core also adopts a structure similar to three rings, in general, three separate ring bodies are combined, and after a period of use, a step difference may exist to cause air leakage. In addition, the bottom of the tire has no rubber layer at all, and thus the air retention is poor. Even if the ply itself is filled with a layer of glue, the air retention provided by such filled rubber is limited during use under pressure, resulting in high inflation frequencies during use.

Compared with the comparative example, the vacuum tire for the bicycle has the advantages that the bead core is not easy to have the step difference, the enough supporting force can be provided for a long time, and the air retention of the vacuum tire is improved.

The bicycle wheel adopts the vacuum tire rim, can be used in cooperation with the vacuum tire, and has a better air-retaining effect. After one time of inflation, the air bag can be stored or used for a long time without frequent inflation.

The invention provides a bicycle, and the wheels of the bicycle adopt the wheels. Because this bicycle adopts the vacuum child to this vacuum child has structural improvement, this bicycle light in weight moreover can keep flat for a long time, long service life.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. A bicycle tubeless tire, comprising a tread rubber layer (20), a ply (40) and a bead core (50), the ply (40) being supported by the bead core (50), the bead The core (50) corresponds to the bead (13) of the tubeless tire; the tread rubber layer (20) is arranged on the outer side of the ply (40) to form the tire crown (10); it is characterized in that: the bead core (50) The single-strand core wire (51) is continuously surrounded by at least 3 turns, and the side of the bead core (50) close to the tire heel (14) is surrounded by the single-strand core wire (51) for no less than 2 turns; The bottom and outer parts of the bead (13) are provided with rubber layers.

2 . The bicycle tubeless tire according to claim 1 , wherein the single-strand core wire ( 51 ) is a single-strand steel wire or a single-strand fiber filament. 3 .

3. A bicycle tubeless tire according to claim 2, characterized in that: the bead core (50) comprises 3-6 turns of single-strand core wires (51); the single-strand core wires (51) ) gradually decreases toward the side away from the heel (14).

4 . The tubeless tire for bicycles according to claim 2 , wherein the end of the single-strand core wire ( 51 ) has an overlap margin of 20-150 mm relative to the starting end. 5 .

5. A bicycle tubeless tire according to claim 2, characterized in that: the diameter of the single-strand core wire (51) is 0.6-1.0 mm.

6. A bicycle tubeless tire according to claim 1, characterized in that: the single-strand core wires (51) are in contact with each other or have a spacing, and the spacing is not greater than 3 mm.

7. A bicycle tubeless tire according to claim 1, characterized in that: the cross section of the single-strand core wire (51) is a circle, an ellipse, a quadrilateral, or a special shape surrounded by a straight line and an arc structure.

8. A bicycle tubeless tire according to any one of claims 1 to 7, characterized in that: the bead (13) of the tubeless tire is composed of a convex section C1 that is convex outside and a concave section C1 that is concave in the cross-sectional structure. The bead (13) is composed of an arc segment C2, the bottom of the bead (13) is a tire butt (14) with a linear structure, and the tire butt (14), the convex segment C1 and the concave arc segment C2 are connected in sequence to form a matching part with the rim; the The mating part is covered with a rubber layer.

9 . The bicycle tubeless tire according to claim 8 , wherein the inclination angle between the heel ( 14 ) of the bead ( 13 ) and the X direction is 3°˜20°. 10 .

10. A bicycle tubeless tire according to claim 8, characterized in that: the convex section C1 is an outwardly convex arc structure, the tangent of the outermost end in the Y direction and the inclined tire butt (14) The intersection point of the extension lines of RD is point RD, the distance d2 between the inner wall of the bead core (50) and the axis of the tubeless tire is not less than the dimension d1 between the RD point and the axis of the tubeless tire, and the difference is 0-1.2 mm.

11. A bicycle tubeless tire according to claim 8, characterized in that: an air-holding rubber layer is provided on the inner side or the outer side of the cord layer (40).

12. A bicycle tubeless tire according to claim 11, characterized in that: the air-holding rubber layer is provided on the outer side of the ply (40) to cover the sidewall (12), or form a full-face rubber to cover the tire Side (12) and bead (13).

13. A bicycle tubeless tire according to claim 11, characterized in that: the air-retaining rubber layer is provided on the inner side of the ply (40) to form an air-tight layer (30), and the air-tight layer (30) bypasses The bead core (50) is folded back outward.

14. A bicycle tubeless tire according to claim 13, characterized in that: a nipple protective rubber (60) is provided on the outer side of the bead (13) of the tubeless tire, and the nipple protective rubber (60) covers the air The folded end of the dense layer (30).

15. A bicycle tubeless tire according to claim 11, characterized in that: the air-holding rubber layer is a tread rubber layer (20) in the area of the tread crown (10), and is glued on the tread rubber layer (20). Wear-resistant rubber blocks form the crown (10).

16. A bicycle wheel, comprising a wheel hub and a tubeless tire, wherein the tubeless tire is the tubeless tire according to any one of claims 1 to 15, and the tubeless tire is matched with a rim (80) of the wheel hub.

17. A bicycle wheel according to claim 16, characterized in that: the rim (80) comprises a rim connecting portion (81) in the middle and a rim mounting portion (82) at both ends, the rim mounting portion (82) ) is mainly composed of the sealing section L1, the sealing section L2 and the pressing section L3 connected in sequence. The sealing section L1 and the mounting surface of the sealing section L2 form an included angle of 90° to 110°, and the pressing section L3 faces the sealing section L2. The inner side is recessed to form a step; the butt (14) of the tubeless tire fits on the mounting surface of the sealing segment L1, the convex segment C1 fits on the mounting surface of the sealing segment L2, and the concave arc segment C2 fits on the mounting surface of the pressing segment L3.

18. A bicycle wheel according to claim 17, characterized in that: the width w of the bead (13) is not greater than the width h of the rim mounting portion (82), so that the fitting portion of the bead (13) can be Mounted on the rim mounting portion (82) to form a seal.

19 . The bicycle wheel according to claim 18 , wherein the difference between the width w of the bead ( 13 ) and the width h of the rim mounting portion ( 82 ) is 0˜1 mm. 20 .

20. A bicycle wheel according to claim 17, characterized in that: further comprising an inner rim airtight ring (83), the inner rim airtight ring (83) being arranged on the rim connecting part (81) for aligning the rim (80) Seal.

21. A bicycle, characterized in that the wheel of the bicycle adopts the wheel according to any one of claims 16-20.