A type of two-wheeled vehicle tire with colored sidewalls

Abstract

This invention provides a two-wheeled vehicle tire with colored sidewalls. The tire includes a tread, two sidewalls, and a pair of beads. The tread and sidewalls are respectively provided with rubber of different colors. The inner contour of the tire is symmetrically divided into side contours along the left and right sides, and the side contours on both sides have the same structure. The upper part of the side contour is set with three arc segments, which are defined as an upper arc, a middle arc, and a lower arc from top to bottom. The upper arc and the middle arc are smoothly connected, and the middle arc and the lower arc are connected, with a height difference set at the connection between the middle arc and the lower arc. The starting point of the middle arc is near the edge of the tread, and the ending point of the middle arc is a transition distance from the end point of the tread pattern. This invention can solve the problem of poor boundary wave without affecting the appearance quality and performance of the tire, eliminating the need for repair procedures and reducing costs.

Description

Technical Field

[0001] This invention relates to a two-wheeled vehicle tire with a colored sidewall, specifically to a cross-sectional profile design for a two-wheeled vehicle tire with a sidewall and tread of different colors. Background Technology

[0002] In recent years, two-wheeled vehicles equipped with colored sidewall tires have become increasingly popular with consumers, such as... Figure 1 For existing colored sidewall tires, the cross-sectional profile P1' of the tread 1' and sidewall 2' uses different colored rubber compounds. However, during tire vulcanization, a wavy pattern easily forms at the boundary between the two colors. This wavy pattern not only severely affects the tire's appearance quality, leading to a high repair rate and increased production and labor costs, but also results in the repair rubber containing certain chemicals, which does not conform to the industry's green and environmentally friendly concepts. To improve this appearance defect, the current improvement methods are as follows: Figure 2 As shown, a repair line A is added at the junction of the two colors of the sidewall 2'. The repair line A is a small circumference of the upper part of the sidewall 2'. Although it has a certain effect on improving the boundary wave, the improvement effect is unstable and the rubber material of the tread 1' is prone to go over the line, which still needs to be repaired. In addition, the repair line A reduces the appearance grade of the tire and has low consumer acceptance. Summary of the Invention

[0003] The present invention aims to solve the problem of poor edge wave without affecting the appearance quality and performance of the tire. Therefore, it provides a two-wheeled vehicle tire with colored sidewalls that eliminates the need for repair procedures and reduces costs.

[0004] To solve the above-mentioned technical problems, the present invention provides a two-wheeled vehicle tire with colored sidewalls. The tire includes a tread, two sidewalls and a pair of tire beads. The tread and sidewalls are respectively provided with rubber of different colors. The inner contour of the tire is symmetrically divided into side contours along the left and right sides, and the side contours on both sides have the same structure.

[0005] The upper part of the side profile is set as three arc segments, which are set as upper arc, middle arc and lower arc from top to bottom; the upper arc and the middle arc are smoothly connected, the middle arc and the lower arc are connected, and a height difference is set at the connection between the middle arc and the lower arc;

[0006] The starting point of the middle arc begins near the edge of the tread, and the ending point of the middle arc has a transition distance from the end point of the tread pattern.

[0007] In a preferred embodiment, a distinct step difference is provided at the connection between the middle arc and the lower arc.

[0008] In a preferred embodiment, the height range of the significant step difference is set between 0.3 mm and 1.0 mm.

[0009] In a preferred embodiment, the transition distance is set in the range of 2.0mm-10.0mm.

[0010] In a preferred embodiment, a first arc segment and a second arc segment are provided at the upper and lower edges of the obvious step difference; the first arc segment and the second arc segment are smoothly connected.

[0011] The first arc segment connects to the middle arc segment, and the second arc segment connects to the lower arc segment.

[0012] In a preferred embodiment, the radius of the first arc segment is smaller than the radius of the second arc segment.

[0013] In a preferred embodiment, both the first and second arc segments are designed with rounded corners.

[0014] In a preferred embodiment, the upper arc segment corresponds to the position near the center of the tire tread, the lower arc segment corresponds to the upper part of the tire sidewall, and the middle arc segment connects the upper and lower arc segments.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0016] 1. This is achieved through an innovative tire cross-sectional profile design. The upper part of the tire's inner profile is designed to consist of three arc segments: an upper arc, a middle arc, and a lower arc. The middle arc is smoothly connected to the upper arc, and a clear step difference is set between the middle arc and the lower arc. The middle arc starts near the edge of the tread and ends at a transition distance from the tread pattern's cutoff point. The step difference and transition distance design can accommodate and slow down the flow of rubber material at the tire shoulder, producing a clear and regular separation boundary, and making it less likely for rubber material to cross the line.

[0017] 2. By setting a rounded corner structure with a smaller top and larger bottom at the edge of the step, the step can more effectively slow down and stop the flow of rubber material, and also reduce the probability of stress concentration on the tire sidewall. The colored sidewall two-wheeled tire using the cross-sectional profile design of this invention solves the industry's problem of poor joints, eliminates the need for repairs, and has multiple benefits, including improved product appearance quality, reduced costs, and environmental friendliness. Attached Figure Description

[0018] Figure 1 The cross-sectional profile of an existing colored sidewall tire;

[0019] Figure 2 This is an improvement method to the existing method of adding repair line A;

[0020] Figure 3 The cross-sectional profile of the tire in a preferred embodiment of the present invention;

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of section B in the middle;

[0022] Figure 5 To adopt Figure 1 Appearance drawing of the prototype tire;

[0023] Figure 6 This is a tire appearance drawing produced using a preferred embodiment of the present invention.

[0024] Explanation of reference numerals in the attached drawings: P, cross-sectional profile; 1, tread; 2, sidewall; 3, bead; R1, upper arc; R2, middle arc; R3, lower arc; E, obvious step difference; O, tread pattern cutoff position; a, transition distance; b, step difference height; R4, chamfer of the first arc segment; R5, chamfer of the second arc segment. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0028] refer to Figures 1-2The current cross-sectional profile P1' of colored sidewall tires is the same as that of ordinary all-black tires. The current improvement method of adding a small circumferential tread line A on the upper part of the sidewall 2' can, to some extent, hinder the flow of rubber material in the tread 1' and play a role in separating and blocking the two rubber materials at the boundary. However, due to the difference in rubber material flowability and thickness, the rubber material in the tread 1' is still prone to cross the line during production and vulcanization, resulting in unstable improvement effect.

[0029] refer to Figures 3-4 Taking into account factors such as appearance quality, cost, and environmental protection, this embodiment provides a two-wheeled vehicle tire with colored sidewalls. Without affecting the tire's appearance quality and performance, it solves the aforementioned problem of uneven edge waves, eliminates the need for repair procedures, and reduces costs.

[0030] like Figure 3 The cross-sectional profile P of the tire shown is defined as follows: the vertical direction is defined as the tire radial direction, the lateral direction is defined as the tire axial direction, and the single-dot line represents the equatorial plane. In this embodiment, the tire includes a tread 1, two sidewalls 2, and a pair of tire beads 3. The tread 1 and sidewalls 2 are respectively provided with rubber materials of different colors.

[0031] The cross-sectional profile P is symmetrically arranged along the equatorial plane, and the profile design on both sides of the equatorial plane is consistent. That is, the inner profile of the tire is symmetrically divided into side profiles along the left and right sides, and the side profile structures on both sides are identical. This embodiment describes the implementation method based on the side profile structure design of one side.

[0032] like Figure 3 The upper part of the side profile is set as three arc segments, including the upper arc R1, the middle arc R2 and the lower arc R3 from top to bottom. The upper arc R1 corresponds to the position of the tread 1 near the center, the lower arc R3 corresponds to the position of the upper part of the sidewall 2, and the middle arc R2 connects the upper arc R1 and the lower arc R3.

[0033] like Figure 4 The middle arc R2 and the upper arc R1 are smoothly connected, but there is a clear step difference E between the middle arc R2 and the lower arc R3. That is, the upper arc R1 gradually transitions to the middle arc R2, and there must be a height difference at the connection between the middle arc R2 and the lower arc R3. The middle arc R2 starts near the edge of the tread 1 and ends at a transition distance a from the tread pattern cutoff point O of the tread 1. This design of the middle arc R2 can accommodate and slow down the flow of rubber at the tire shoulder. The clear step difference with the lower arc R3 can limit the flow of rubber on the tread to terminate at the clear step difference E. The two rubber materials produce a clear and regular separation boundary, and the boundary step difference structure is less likely to cause rubber material to cross the line compared to the current trim lines.

[0034] Based on the size of the tread 1 rubber compound, the shoulder style, and the product characteristics of colored sidewall tires for two-wheeled vehicles, the preferred transition distance a is 2.0mm-10.0mm. The transition distance a is the transition distance of the tread 1 rubber compound. If it is set too short, it will not be able to effectively slow down and stop the flow of the rubber compound. If the transition distance a is too long, it will greatly shorten the coverage width of the colored sidewall rubber compound, affecting the appearance quality.

[0035] The height b of the obvious step difference E is preferably 0.3mm-1.0mm. If the step height of the height b segment is too low, it will not be able to effectively stop the flow of rubber material, resulting in the rubber material going over the line. If the step height of the height b segment is too high, the difference in the boundary between the two different colored rubber materials will be too large, which will also easily cause stress concentration problems in the tire sidewall 2, resulting in negative impact on the performance.

[0036] Considering both the appearance and performance of the boundary, the upper and lower edges of the obvious step E are further rounded. Specifically, a first arc segment and a second arc segment are provided at the upper and lower edges of the obvious step E. The first arc segment connects to the middle arc segment, and the second arc segment connects to the lower arc segment. The chamfer R4 of the first arc segment must be smaller than the chamfer R5 of the second arc segment. This rounded corner design, with a smaller upper edge and a larger lower edge, helps the obvious step E more effectively stop the flow of rubber material and further reduces the probability of stress concentration on the tire sidewall 2. Furthermore, the rounded corners at the upper and lower edges visually weaken and conceal some minor boundary irregularities.

[0037] In summary, this invention employs an innovative tire cross-sectional profile design: the upper part of the tire's inner profile is composed of three arc segments: an upper arc R1, a middle arc R2, and a lower arc R3. The middle arc R2 is smoothly connected to the upper arc R1, while a clear step difference E is provided between the middle arc R2 and the lower arc R3. The middle arc R2 begins near the edge of the tread 1 and ends at a transition distance a from the tread pattern cutoff point O of the tread 1. The preferred size of the transition distance a is 2.0-10.0 mm, and the preferred size of the height b of the clear step difference E is 0.3-1.0 mm. The design of the clear step difference E and the transition distance a can accommodate and slow down the flow of rubber material at the tire shoulder, producing a clear and regular separation boundary, and reducing the likelihood of rubber material crossing the line. Furthermore, the edge of the clear step difference E is designed with a rounded corner structure that is smaller at the top and larger at the bottom, which can help the clear step difference E to more effectively slow down and terminate the flow of rubber material, and further reduce the probability of stress concentration on the tire sidewall 2. The colored sidewall two-wheeled vehicle tire designed in this embodiment solves the problem of poor junction quality in the industry, eliminates the need for repair procedures, and has multiple benefits such as improving product appearance quality, reducing costs, and being environmentally friendly.

[0038] Using existing Figure 1Both the technology and the tire design of this embodiment were used to prototype bicycle tires with brown sidewalls, each with a specification of 700X40C. Under identical conditions, the effects of the colored sidewalls on the finished tires were as follows: Figure 5 6. A comparison shows that: Figure 5 Using existing Figure 1 The prototype tire has a noticeably wavy edge at the junction of the two rubber materials on the sidewall, which requires repair fluid for fixing. Figure 6 The tires produced using the technology of this invention have clear, regular, and perfectly round boundaries between the two rubber compounds on the sidewall, requiring no repair. Practical verification shows that the tires produced using this invention have superior appearance quality compared to existing tire technologies, while avoiding the cost and environmental problems associated with repairs.

[0039] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A two-wheeled vehicle tire with colored sidewalls, the tire comprising a tread, two sidewalls, and a pair of tire beads, wherein the tread and sidewalls are respectively provided with rubber compounds of different colors; characterized in that: The inner contour of the tire is symmetrically divided into side contours along the left and right sides, and the side contours on both sides have the same structure. The upper part of the side profile is set as three arc segments, which are set as upper arc, middle arc and lower arc from top to bottom; the upper arc and the middle arc are smoothly connected, the middle arc and the lower arc are connected, and a height difference is set at the connection between the middle arc and the lower arc; The starting point of the middle arc begins near the edge of the tread, and the ending point of the middle arc has a transition distance from the end of the tread pattern. A clear step difference is provided at the connection between the middle arc and the lower arc; A first arc segment and a second arc segment are provided at the upper and lower edges of the obvious step difference; the first arc segment and the second arc segment are smoothly connected; The first arc segment connects to the middle arc segment, and the second arc segment connects to the lower arc segment; The radius of the first arc segment is smaller than the radius of the second arc segment.

2. A two-wheeled vehicle tire with colored sidewalls according to claim 1, characterized in that: The height range of the obvious step difference is set between 0.3mm and 1.0mm.

3. A two-wheeled vehicle tire with colored sidewalls according to claim 1, characterized in that: The transition distance is set in the range of 2.0mm-10.0mm.

4. A two-wheeled vehicle tire with colored sidewalls according to claim 1, characterized in that: Both the first and second arc segments have rounded corners.

5. A two-wheeled vehicle tire with colored sidewalls according to claim 1, characterized in that: The upper arc corresponds to the position near the center of the tire tread, the lower arc corresponds to the position at the upper part of the tire sidewall, and the middle arc connects the upper arc and the lower arc.

Images