Low profile white sidewall off-the-road tire

Abstract

The utility model belongs to the technical field of tire, specifically relates to a low flat ratio white sidewall cross -country tire, including the tread, the sidewall and the bead, the mouth shape part of sidewall includes the inner sidewall and the outer sidewall, the upper end of the sidewall rubber of inner sidewall is equipped with the cushioning gum, and the lower end is equipped with the sub -mouth rubber protection gum, the upper end of the sidewall rubber of outer sidewall is equipped with the cushioning gum, and the lower end is sequentially extended and is equipped with the white rubber and the sub -mouth rubber protection gum, the inner sidewall is black sidewall, and the outer sidewall includes black sidewall and white sidewall, and black sidewall is equipped with the patterned decorative line and the cushioning gum, and white sidewall is equipped with the white rubber and the covering rubber sheet, the cushioning gum of the utility model sidewall can avoid the stiffness mutation between the belt and the tire body, reduce the interface shear stress, reduce the tire crown bulge from the source, the belt delamination risk, improve cross -country tire side impact resistance performance, the utility model combines the stress distribution of cross -country tire sidewall, and the white sidewall and the patterned decorative area are optimized, avoid stress concentration, and the appearance definition and the damage resistance are taken into account.

Description

Technical Field

[0001] This utility model belongs to the field of tire technology, specifically relating to a low aspect ratio white sidewall off-road tire. Background Technology

[0002] White-sideplate tires are decorative tires that use white rubber on the sidewalls through a special process. They are mainly used in high-end sedans, retro-modified cars, and ceremonial vehicles, combining aesthetic value with anti-aging properties. Due to their unique appearance, white-sideplate tires have gradually become a fashion element and are favored by consumers. In the 1970s, Mickey Thompson introduced white-lettered tires to the off-road field, making them an important symbol of off-road culture.

[0003] Off-road tires typically feature shoulder trim with a height of 4-8mm to showcase their rugged characteristics. However, for low-profile off-road tires with white sidewalls, the shoulder trim is easily damaged or exposed during the polishing process. Furthermore, due to market demand for differentiated white sidewall designs, the market demand for off-road tires has shifted from prioritizing functionality to a balance between performance and aesthetics. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a low-profile off-road tire with a white sidewall. The sidewall padding of this invention avoids abrupt changes in stiffness between the belt layer and the tire carcass, reduces interfacial shear stress, and fundamentally reduces the risk of tire crown bulges and belt layer delamination, thus improving the impact resistance of the off-road tire sidewall. This invention combines the stress distribution of the off-road tire sidewall, optimizes the white sidewall and tread pattern area, avoids stress concentration, balances appearance clarity and damage resistance, and eliminates interference between the tread pattern lines and rim protection protrusions when grinding the white sidewall, thereby improving the tire's appearance.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A low aspect ratio off-road tire with white sidewalls includes a tread, a sidewall, and a bead. The bead-shaped components of the sidewall include an inner sidewall and an outer sidewall. The upper end of the sidewall rubber of the inner sidewall is provided with a pad rubber, and the lower end is provided with a bead protector rubber. The upper end of the sidewall rubber of the outer sidewall is provided with a pad rubber, and the lower end is provided with white rubber and a bead protector rubber in sequence. The inner tire sidewall is a black tire sidewall, and the outer tire sidewall includes a black tire sidewall and a white tire sidewall. The black tire sidewall is provided with a decorative strip and a rubber pad, and the white tire sidewall is provided with white rubber and a cover film.

[0006] Furthermore, the width W5 of the white glue = the width of the white glue on the mold + (25~30) mm, and the thickness h of the white glue = the thickness of the white glue on the mold + (1.5~2) mm.

[0007] Furthermore, the width of the decorative stripe is (15%~20%)*H, where H is the tire section height in mm; the thickness of the decorative stripe is 4~8mm.

[0008] Furthermore, the difference between the lower end width W1 and the upper end width W2 of the ferrule is W1-W2=15mm~30mm, where W1=50mm~55mm; The difference between the upper width W4 and the lower width W3 of the padding is W4-W3=10mm~15mm, where W3=30~35mm; The cover film is a black film covering the white glue. The width of the cover film is W5 + 2 * d, where d ranges from 8 to 10 mm, and the thickness is 0.6 to 1.0 mm.

[0009] Furthermore, the distance H1 between the upper end of the white glue on the mold and the lower end of the decorative pattern is ≥15mm, and the distance H2 between the lower end of the white glue on the mold and the upper end of the wheel rim protection boss A is ≥15mm.

[0010] Furthermore, the tread is provided with tread rubber, base rubber, crown layer, belt layer, carcass and inner liner layer in sequence on the radial inner side. The carcass includes a first carcass, a second carcass and a third carcass, and the sidewall is attached to the outside of the third carcass.

[0011] Furthermore, the tire bead includes a steel wire bead and a triangular rubber core, the first tire carcass and the second tire carcass wrap around the steel wire bead, the third tire carcass wraps around the steel wire bead at 1 / 2 of its height, and the triangular rubber core is connected to the upper end of the steel wire bead.

[0012] Furthermore, the lettering engraving angle β in the white glue area of ​​the mold is 8°~15°, and the chamfer radius Rx is 1.5~2.0mm.

[0013] Furthermore, the height of the triangular rubber core is (25%~30%)*H, the distance between the top of the triangular rubber core and the upper and lower ends of the white rubber is ≥15mm, and the distance between the top of the triangular rubber core and the reverse wrapping ends of the first and second tire bodies is ≥10mm.

[0014] Furthermore, the aspect ratio H / W*100≤50 of the off-road tire with white sidewall is used, where H is the tire section height in mm and W is the tire section width in mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model combines the stress distribution on the sidewall of off-road tires, and optimizes the design of the white glue and decorative area by limiting the distance between the upper end of the white glue and the lower end of the decorative line, limiting the distance between the lower end of the white glue and the upper end of the wheel rim protection boss, and standardizing the design of the white glue thickness on the mold. This avoids stress concentration, balances appearance clarity and damage resistance, and optimizes the white glue thickness.

[0016] The tire sidewall of this invention includes a pad rubber, a sidewall rubber, and a bead protector. Conventional tire sidewalls only include a sidewall rubber and a bead protector. The sidewall rubber has a Shore A hardness of 55-65, while the pad rubber has a Shore A hardness of 75-85 and is filled with a high proportion of carbon black to improve the modulus and strength of the pad rubber to resist deformation. The pad rubber and the sidewall rubber form a hardness gradient distribution, which can provide rigid support, disperse crown stress, avoid abrupt changes in stiffness between the belt layer and the tire carcass, reduce interfacial shear stress, reduce the risk of tire crown bulges and belt layer delamination from the root, and improve the impact resistance of the off-road tire sidewall. Attached Figure Description

[0017] Figure 1 This invention presents a schematic diagram of the structure of a low aspect ratio white sidewall off-road tire in an embodiment of the present invention.

[0018] Figure 2A yes Figure 1 A schematic diagram of the structure of the outer sidewall of a white-side off-road tire.

[0019] Figure 2B yes Figure 1 A schematic diagram of the structure of the inner sidewall of a white-side off-road tire.

[0020] Figure 3 This is a schematic diagram of the cross-section of the lettering groove on the white sidewall of the tire mold.

[0021] Explanation of reference numerals in the attached diagram: 1-First tire carcass; 2-Second tire carcass; 3-Third tire carcass; 10-Tire carcass; 11-White rubber; 12-Decorative stripe; 20-Sidewall; 21-Pad rubber; 22-Sidewall rubber; 23-Bead protector; 30-Bead; 31-Wire bead; 32-Triangle rubber core; A-Rim protection boss. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] Example 1 like Figure 1As shown in Figure 2, a low aspect ratio white sidewall off-road tire includes a tread, a sidewall 20, and a bead 30. The sidewall 20 is located on the outer side of the tire. The bead-shaped components of the sidewall 20 include an inner sidewall and an outer sidewall. The upper end of the sidewall rubber 22 of the inner sidewall is provided with a harder pad rubber 21 (the hardness of the pad rubber 21 is greater than that of the sidewall rubber 22, and the Shore A hardness of the pad rubber 21 is 75), and the lower end is provided with a bead protector 23. The upper end of the sidewall rubber 22 of the outer sidewall is provided with a pad rubber 21, and the lower end is provided with a white rubber 11 and a bead protector 23 in sequence. The inner tire sidewall is black, and the outer tire sidewall includes a black tire sidewall and a white tire sidewall. The black tire sidewall is provided with a decorative strip 12 and a pad 21, and the white tire sidewall is provided with a white glue 11 and a cover film.

[0024] The tread has a tread rubber, a base rubber, a crown layer, a belt layer, a carcass 10 and an inner liner layer arranged in sequence on the radial inner side. The carcass 10 includes a first carcass 1, a second carcass 2 and a third carcass 3, and the sidewall 20 is attached to the outside of the third carcass 3.

[0025] The width W5 of white glue 11 = width of white glue on the mold + 25mm = 16mm + 25mm = 41mm, and the thickness h of white glue 11 = thickness of white glue on the mold + 1.5mm = 3.5mm + 1.5mm = 5mm, to prevent white glue from leaking out of the tire after vulcanization.

[0026] To ensure that the thickness of the white tire sidewall is at least 2mm after grinding, the thickness of the white adhesive on the mold is designed to be 3.5mm. The width of the decorative strip 12 is 15% * H, where H is the tire section height in mm; the thickness of the decorative strip 12 is 4 mm.

[0027] The difference between the lower width W1 and the upper width W2 of the ferrule 23 is W1-W2=15mm, where W1=50mm; The difference between the upper width W4 and the lower width W3 of the pad 21 is W4-W3=10mm, where W3=30mm; The cover film is a black film that is placed over the white film 11. The width of the cover film is W5 + 2 * d, where d is in the range of 8 mm. The thickness of the cover film is 0.6 mm.

[0028] The distance H1 between the upper end of the white adhesive on the mold and the lower end of the tread pattern decorative line 12 is 15mm, and the distance H2 between the lower end of the white adhesive on the mold and the upper end of the rim protection boss A is 15mm. This avoids interference between the tread pattern decorative line and the rim protection boss when polishing the white tire sidewall. The tire bead 30 includes a steel wire bead 31 and a triangular rubber core 32. The first tire body 1 and the second tire body 2 wrap around the steel wire bead 31, and the third tire body 3 wraps around the steel wire bead 31 at half the height. The triangular rubber core 32 is connected to the upper end of the steel wire bead 31.

[0029] like Figure 3 As shown, the engraving angle β of the lettering in the white glue area on the mold is 8°, and the chamfer radius Rx is 1.5mm. This helps to disperse stress during demolding, reduce wear, and extend the mold's service life.

[0030] The height of the triangular rubber core 32 is 25%*H, which takes into account the distance between the end of the white rubber 11 and the reverse wrapping end of the first tire body 1 and the second tire body 2.

[0031] The distance between the top of the triangular rubber core 32 and the upper and lower ends of the white rubber 11 is ≥15mm, and the distance between the top of the triangular rubber core 32 and the reverse end points of the first tire body 1 and the second tire body 2 is ≥10mm, so as to avoid stress concentration leading to bulging and delamination of the tire sidewall.

[0032] The aspect ratio of the above tires is H / W*100≤50, where H is the tire section height, H≤130mm; and W is the tire section width, mm.

[0033] Example 2 A low aspect ratio off-road tire with white sidewalls includes a tread, a sidewall 20, and a bead 30. The sidewall 20 is located on the outer side of the tire. The bead components of the sidewall 20 include an inner sidewall and an outer sidewall. The upper end of the sidewall rubber 22 of the inner sidewall is provided with a harder pad rubber 21 (the hardness of the pad rubber 21 is greater than that of the sidewall rubber 22, and the Shore A hardness of the pad rubber 21 is 80), and the lower end is provided with a bead protector 23. The upper end of the sidewall rubber 22 of the outer sidewall is provided with a pad rubber 21, and the lower end is provided with a white rubber 11 and a bead protector 23 in sequence. The inner tire sidewall is black, and the outer tire sidewall includes a black tire sidewall and a white tire sidewall. The black tire sidewall is provided with a decorative strip 12 and a pad 21, and the white tire sidewall is provided with a white glue 11 and a cover film.

[0034] The tread has a tread rubber, a base rubber, a crown layer, a belt layer, a carcass 10 and an inner liner layer arranged in sequence on the radial inner side. The carcass 10 includes a first carcass 1, a second carcass 2 and a third carcass 3, and the sidewall 20 is attached to the outside of the third carcass 3.

[0035] The width W5 of white glue 11 = width of white glue on the mold + 28mm = 22mm + 28mm = 50mm, and the thickness h of white glue 11 = thickness of white glue on the mold + 2mm = 4mm + 2mm = 6mm, to prevent white glue from leaking out of the tire after vulcanization.

[0036] To ensure that the thickness of the white tire sidewall is at least 2mm after the tire is polished, the thickness of the white glue on the mold is designed to be 4mm. The width of the decorative line 12 is 18% * H, where H is the tire section height in mm; the thickness of the decorative line 12 is 6 mm.

[0037] The difference between the lower width W1 and the upper width W2 of the ferrule 23 is W1-W2=15mm, where W1=55mm; The difference between the upper width W4 and the lower width W3 of the pad 21 is W4-W3=15mm, where W3=35mm; The cover film is a black film that is placed over the white film 11. The width of the cover film is W5 + 2 * d, where d is in the range of 10 mm. The thickness of the cover film is 0.6 mm.

[0038] The distance H1 between the upper end of the white adhesive on the mold and the lower end of the tread pattern decorative line 12 is 18mm, and the distance H2 between the lower end of the white adhesive on the mold and the upper end of the rim protection boss A is 15mm. This avoids interference between the tread pattern decorative line and the rim protection boss when polishing the white tire sidewall. The tire bead 30 includes a steel wire bead 31 and a triangular rubber core 32. The first tire body 1 and the second tire body 2 wrap around the steel wire bead 31, and the third tire body 3 wraps around the steel wire bead 31 at half the height. The triangular rubber core 32 is connected to the upper end of the steel wire bead 31.

[0039] The lettering engraving angle β in the white glue area of ​​the mold is 8°, and the chamfer radius Rx is 1.5mm. This helps to distribute stress during demolding, reduce wear, and extend the mold's service life.

[0040] The height of the triangular rubber core 32 is 28%*H, which takes into account the distance between the end of the white rubber 11 and the reverse wrapping end of the first tire body 1 and the second tire body 2.

[0041] The distance between the top of the triangular rubber core 32 and the upper and lower ends of the white rubber 11 is ≥15mm, and the distance between the top of the triangular rubber core 32 and the reverse end points of the first tire body 1 and the second tire body 2 is ≥10mm, so as to avoid stress concentration leading to bulging and delamination of the tire sidewall.

[0042] The aspect ratio of the above tires is H / W*100≤50, where H is the tire section height, 130mm<H≤150mm; and W is the tire section width, in mm.

[0043] Example 3 A low aspect ratio white sidewall off-road tire includes a tread, a sidewall 20, and a bead 30. The sidewall 20 is located on the outer side of the tire. The bead components of the sidewall 20 include an inner sidewall and an outer sidewall. The upper end of the sidewall rubber 22 of the inner sidewall is provided with a harder pad rubber 21 (the hardness of the pad rubber 21 is greater than that of the sidewall rubber 22, and the Shore A hardness of the pad rubber 21 is 85), and the lower end is provided with a bead protector 23. The upper end of the sidewall rubber 22 of the outer sidewall is provided with a pad rubber 21, and the lower end is provided with a white rubber 11 and a bead protector 23 in sequence. The inner tire sidewall is black, and the outer tire sidewall includes a black tire sidewall and a white tire sidewall. The black tire sidewall is provided with a decorative strip 12 and a pad 21, and the white tire sidewall is provided with a white glue 11 and a cover film.

[0044] The tread has a tread rubber, a base rubber, a crown layer, a belt layer, a carcass 10 and an inner liner layer arranged in sequence on the radial inner side. The carcass 10 includes a first carcass 1, a second carcass 2 and a third carcass 3, and the sidewall 20 is attached to the outside of the third carcass 3.

[0045] The width W5 of white glue 11 = width of white glue on the mold + 30mm = 25mm + 30mm = 55mm, and the thickness h of white glue 11 = thickness of white glue on the mold + 1.5mm = 3.5mm + 1.5mm = 5mm, to prevent white glue from leaking out of the tire after vulcanization.

[0046] To ensure that the thickness of the white tire sidewall is at least 2mm after grinding, the thickness of the white adhesive on the mold is designed to be 3.5mm; The width of the decorative line 12 is 20% * H, where H is the tire section height in mm; the thickness of the decorative line 12 is 8 mm.

[0047] The difference between the lower width W1 and the upper width W2 of the ferrule 23 is W1-W2=15mm, where W1=50mm; The difference between the upper width W4 and the lower width W3 of the pad 21 is W4-W3=10mm, where W3=30mm; The cover film is a black film that is placed over the white film 11. The width of the cover film is W5 + 2 * d, where d is in the range of 8 mm. The thickness of the cover film is 0.6 mm.

[0048] The distance H1 between the upper end of the white adhesive on the mold and the lower end of the tread pattern decorative line 12 is 18mm, and the distance H2 between the lower end of the white adhesive on the mold and the upper end of the rim protection boss A is 15mm. This avoids interference between the tread pattern decorative line and the rim protection boss when polishing the white tire sidewall. The tire bead 30 includes a steel wire bead 31 and a triangular rubber core 32. The first tire body 1 and the second tire body 2 wrap around the steel wire bead 31, and the third tire body 3 wraps around the steel wire bead 31 at half the height. The triangular rubber core 32 is connected to the upper end of the steel wire bead 31.

[0049] The lettering engraving angle β in the white glue area of ​​the mold is 15°, and the chamfer radius Rx is 2mm. This helps to distribute stress during demolding, reduce wear, and extend the mold's service life.

[0050] The height of the triangular rubber core 32 is 30%*H, taking into account the distance between the end of the white rubber 11 and the reverse wrapping end of the first tire body 1 and the second tire body 2.

[0051] The distance between the top of the triangular rubber core 32 and the upper and lower ends of the white rubber 11 is ≥15mm, and the distance between the top of the triangular rubber core 32 and the reverse end points of the first tire body 1 and the second tire body 2 is ≥10mm, so as to avoid stress concentration leading to bulging and delamination of the tire sidewall.

[0052] The aspect ratio of the above tires is H / W*100≤50, where H is the tire section height (H>150mm) and W is the tire section width (mm).

[0053] The above-mentioned tires are suitable for off-road tires with white sidewalls and a section height H > 150 mm or tires used for harsh road conditions.

[0054] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A low aspect ratio off-road tire with a white sidewall, characterized in that, The tire includes a tread, a sidewall (20), and a bead (30). The bead-shaped components of the sidewall (20) include an inner sidewall and an outer sidewall. The upper end of the sidewall rubber (22) of the inner sidewall is provided with a pad rubber (21), and the lower end is provided with a bead protector rubber (23). The upper end of the sidewall rubber (22) of the outer sidewall is provided with a pad rubber (21), and the lower end is provided with a white rubber (11) and a bead protector rubber (23). The inner tire sidewall is a black tire sidewall, and the outer tire sidewall includes a black tire sidewall and a white tire sidewall. The black tire sidewall is provided with a decorative strip (12) and a pad (21), and the white tire sidewall is provided with white glue (11) and a cover film.

2. The low aspect ratio white sidewall off-road tire according to claim 1, characterized in that, The width W5 of the white glue (11) is equal to the width of the white glue on the mold + (25~30) mm, and the thickness h of the white glue (11) is equal to the thickness of the white glue on the mold + (1.5~2) mm.

3. The low aspect ratio white sidewall off-road tire according to claim 1, characterized in that, The width of the decorative line (12) is (15%~20%)*H, where H is the tire section height in mm; the thickness of the decorative line (12) is 4~8mm.

4. The low aspect ratio white sidewall off-road tire according to claim 1, characterized in that, The difference between the lower width W1 and the upper width W2 of the sub-mouth protective adhesive (23) is W1-W2=15mm~30mm, where W1=50mm~55mm; The difference between the upper width W4 and the lower width W3 of the pad (21) is W4-W3=10mm~15mm, where W3=30~35mm; The covering film is a black film covering the white glue (11). The width of the covering film is W5 + 2 * d, where d ranges from 8 to 10 mm and the thickness is 0.6 to 1.0 mm.

5. The low aspect ratio white sidewall off-road tire according to claim 2, characterized in that, The distance H1 between the upper end of the white glue on the mold and the lower end of the decorative line (12) is ≥15mm, and the distance H2 between the lower end of the white glue on the mold and the upper end of the wheel flange protection boss A is ≥15mm.

6. The low aspect ratio white sidewall off-road tire according to claim 1, characterized in that, The tread is provided with tread rubber, base rubber, crown layer, belt layer, carcass (10) and inner liner layer in sequence on the radial inner side. The carcass (10) includes a first carcass (1), a second carcass (2) and a third carcass (3). The sidewall (20) is attached to the outside of the third carcass (3).

7. The low aspect ratio white sidewall off-road tire according to claim 6, characterized in that, The tire bead (30) includes a wire bead (31) and a triangular rubber core (32). The first tire body (1) and the second tire body (2) wrap around the wire bead (31) from the outside. The third tire body (3) wraps around the wire bead (31) at half the height of the wire bead (31). The triangular rubber core (32) is connected to the upper end of the wire bead (31).

8. The low aspect ratio white sidewall off-road tire according to claim 2, characterized in that, The engraving angle β of the characters in the white glue area on the mold is 8°~15°, and the chamfer radius Rx is 1.5~2.0mm.

9. The low aspect ratio white sidewall off-road tire according to claim 7, characterized in that, The height of the triangular rubber core (32) is (25%~30%)*H. The distance between the top of the triangular rubber core (32) and the upper and lower ends of the white glue (11) is ≥15mm. The distance between the top of the triangular rubber core (32) and the reverse end points of the first tire body (1) and the second tire body (2) is ≥10mm.

10. The low aspect ratio white sidewall off-road tire according to any one of claims 1-9, characterized in that, The aspect ratio of the off-road tire with white sidewall is H / W*100≤50, where H is the tire section height in mm and W is the tire section width in mm.

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