Spare tire

Abstract

The invention relates to the technical field of automobile tires, and particularly discloses a spare tire, which is used for solving the problem of insufficient safety of a spare tire in the prior art. Comprising two steel wire rings, the outer sides of the steel wire rings are wrapped with supporting apex, a sidewall is distributed on the outer side of the supporting apex, a polyester tire body layer is arranged between the supporting apex and the sidewall, a lining layer is arranged on the inner side of the supporting apex where the polyester tire body layer is located, two steel wire belt plies are arranged at the upper end of the lining layer, and tread layers are arranged on the outer sides of the steel wire belt plies. The tire further comprises a pattern structure arranged on the tread layer. By optimizing the tread pattern design, the control stability of the tire in the running process is improved, and the braking distance is reduced; by optimizing the contour and structural design of the tire, the tire stress in the driving process is improved, the tire wear is delayed, the effective driving time of the tire is prolonged, and the driving safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile tires, in particular to a spare tire. Background Art

[0002] Usually, when a tire fails due to an unexpected situation during driving, it is necessary to replace the spare tire. Existing spare tires are divided into two types: full-size spare tires and non-full-size temporary spare tires. The function of a full-size spare tire is equivalent to replacing a car tire to ensure safety performance during driving. The speed level and load-bearing index of a non-full-size spare tire are different from those of a normal car tire, and can only be used as a temporary replacement.

[0003] As a temporary or emergency tire, the spare tire has a short service life, is easily worn out, and is related to the driving stability and safety factor of the car.

[0004] Based on this, a spare tire is now provided, which can eliminate the disadvantages of the existing device. Summary of the invention

[0005] The purpose of the present invention is to provide a spare tire, which solves the problem of insufficient safety of spare tires in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A spare tire comprises two wire rings, the outer side of the wire rings is wrapped with a supporting apex rubber, the sidewalls are distributed on the outer side of the supporting apex rubber, a polyester carcass layer is arranged between the supporting apex rubber and the sidewalls, an inner liner layer is arranged on the inner side of the supporting apex rubber where the polyester carcass layer is located, two steel belt layers are arranged on the upper end of the inner liner layer, and a tread layer is arranged on the outer side of the steel belt layer; and also comprises a pattern structure arranged on the tread layer.

[0008] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0009] In an optional solution: the polyester carcass layer has a thickness of 0.8-1.0 mm, the breaking strength of the polyester cord monofilament is 200-300 N; and the content of chlorinated butyl rubber in the inner liner is ≥70%.

[0010] In an optional solution: the steel belt layer has a thickness of 0.8-1.05 mm, a breaking force of a single wire of 400-460 N, and a width and TDW single-side difference B=4-6 mm; the tire sidewall has a Shore A hardness of 50-56 and a tear elongation of 550-620.

[0011] In an optional solution: the pattern structure includes a center pattern K2 and a shoulder pattern K1. The pattern is arranged by longitudinal grooves A3 and transverse "Z-shaped" grooves A4 to improve the driving stability of the tire; the center pattern K2 has evenly distributed fine grooves A2 with a length of 5 to 10 mm, a depth of 1 to 3 mm, a width of 0.6 to 0.8 mm, and an angle α of the fine grooves A2 of 145° to 155°.

[0012] In an optional solution: the shoulder pattern K1 has uniformly distributed fine grooves A1 with a length of 20-30 mm, a depth of 1-3 mm, and a width of 0.6-0.8 mm. The longitudinal groove A3 has an angle β of 140-155°.

[0013] In an optional solution: the width of the tire contact patch is TDW, the longitudinal groove A3 has a width L / TDW=3%-5%, a depth of 3-5 mm, and a distance L1 from the groove to the pattern center=13-16 mm.

[0014] In an optional solution: the pattern of the pattern structure is arranged in disorder by three different pattern pitches, the number of pitches is 23, 24, 23, P1 / P2=1.2-1.3, P1 / P3=1.4-1.6.

[0015] In an optional solution: the pattern blocks of the pattern structure are arranged in a staggered manner and adopt a "Z-type" pattern block design. In the middle pattern block K2, the angle between the transverse groove and the longitudinal groove of the pattern is δ=105°, and the angle between the transverse grooves is δ'=105°.

[0016] In an optional solution: the shoulder pattern block K1 is of a gentle "Z-shaped design", the angle between the transverse groove and the longitudinal groove of the pattern is ω=75°, and the angle between the transverse groove and the transverse groove is β=140~155°.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention improves the handling stability of the tire during driving and reduces the braking distance by optimizing the tread pattern design; improves the tire force during driving, delays tire wear, increases the effective driving time of the tire, and ensures driving safety by optimizing the tire profile and structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the pattern design of the present invention.

[0020] Figure 2 Schematic diagram of material distribution of the tire of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the center pattern K2 of the present invention.

[0022] Figure 4It is a schematic diagram of the structure of the shoulder pattern K1 of the present invention.

[0023] Figure 5 This is the pressure distribution diagram of the present invention.

[0024] Notes on reference numerals: wire bead 1, supporting apex rubber 2, sidewall 3, polyester carcass layer 4, inner liner 5, steel belt layer 6, tread layer 7. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-Figure 5 As shown, an embodiment of the present invention provides a spare tire, comprising two wire rings 1, two supporting apex rubbers 2, two sidewalls 3, a polyester carcass layer 4, an inner liner 5, two steel belt layers 6, and a tread layer 7;

[0027] The outer side of the wire ring 1 is wrapped with a supporting apex 2, and the sidewall 3 is distributed on the outer side of the supporting apex 2. A polyester carcass layer 4 is provided between the supporting apex 2 and the sidewall 3. An inner liner 5 is provided on the inner side of the supporting apex 2 where the polyester carcass layer 4 is located. Two steel belt layers 6 are provided on the upper end of the inner liner 5, and a tread layer 7 is provided on the outer side of the steel belt layer 6.

[0028] A polyester carcass layer 4, with a thickness of 0.8-1.0 mm, and a breaking force of a polyester cord monofilament of 200-300 N; an inner liner 5 having a chlorinated butyl rubber content of ≥70%; a steel belt layer 6, with a thickness of 0.8-1.05 mm, a breaking force of a monofilament of 400-460 N, and a width and TDW single-side difference B=4-6 mm; a sidewall 3, with a rubber compound Shore A hardness of 50-56 and a tear elongation of 550-620;

[0029] It also includes a pattern structure arranged on the tread layer 7, which includes a center pattern K2 and a shoulder pattern K1. The pattern is arranged by longitudinal grooves A3 and transverse "Z-shaped" grooves A4 to improve the driving stability of the tire; the center pattern K2 has uniformly distributed fine grooves A2, with a length of 5 to 10 mm, a depth of 1 to 3 mm, a width of 0.6 to 0.8 mm, and an angle α of the fine grooves A2 of 145° to 155°; the shoulder pattern K1 has uniformly distributed fine grooves A1, with a length of 20 to 30 mm, a depth of 1 to 3 mm, and a width of 0.6 to 0.8 mm. The longitudinal groove A3 has an angle β of 140 to 155°;

[0030] The tire contact patch width is TDW, the longitudinal groove A3 has a width L / TDW = 3% to 5%, a depth of 3 to 5 mm, and a distance L1 from the center of the groove to the pattern = 13 to 16 mm:

[0031] The pattern of the pattern structure is arranged in disorder with three different pattern pitches, the number of pitches is 23, 24, 23, P1 / P2=1.2~1.3, P1 / P3=1.4~1.6;

[0032] The blocks of the pattern structure are staggered and adopt a "Z-type" block design. The middle block K2 has a transverse groove and a longitudinal groove angle of δ = 105°, and a transverse groove and a transverse groove angle of δ' = 105°; the shoulder block K1 has a gentle "Z-type design", with a transverse groove and a longitudinal groove angle of ω = 75°, and a transverse groove and a transverse groove angle of β = 140-155°; this "Z-type" block is staggered at different angles, effectively optimizing the rigid arrangement of the blocks K1 and K2, thereby further improving the safety performance of the product during actual driving;

[0033] During normal use of the product, after the tread layer 7 and pattern rigidity optimization, the force is evenly distributed to the steel belt layer 6, and evenly stressed through the carcass layer 3 and the sidewall layer 5, and then transmitted to the rim. During this process, the tire is evenly stressed without adverse deformation and stress concentration, ensuring that the tire maintains its safety performance under various working conditions such as forward, backward, steering, and braking.

[0034] The T125 / 80R1799M test tire prepared according to this scheme has an optimized pattern pitch and transverse groove design, and an optimized structural design.

[0035] 1. According to the ECE R64 method, the actual vehicle is braked on dry and wet roads, with a front axle load of 1145kg, a rear axle load of 1080kg, braking triggered at 80km / h, a braking distance of less than 32m, a maximum pedal force of less than 250N, and no abnormal vibration or abnormal wear.

[0036] 2. According to the test method specified in GB / T 4502, a durability test was carried out. The tire was rolled continuously for 34 hours at a speed of 80 km / h at a room temperature of 36-40°C, a tire load of 775 kg, an air pressure of 360 kPa, and no problems were found in the tire.

[0037] 3. According to the test method specified in GB / T 4502, a high-speed test was conducted. The tire was kept at a room temperature of 36-40°C, a load of 775kg, and an air pressure of 420kPa. The tire was run at 130km / h for 10 minutes and no problems were found.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spare tire, characterized in that: The invention comprises two steel wire rings (1), the outer side of the steel wire rings (1) is wrapped with a supporting apex rubber (2), the sidewalls (3) are distributed on the outer side of the supporting apex rubber (2), a layer of polyester carcass layer (4) is arranged between the supporting apex rubber (2) and the sidewalls (3), an inner liner layer (5) is arranged on the inner side of the supporting apex rubber (2) where the polyester carcass layer (4) is located, two layers of steel belt layers (6) are arranged on the upper end of the inner liner layer (5), and a tread layer (7) is arranged on the outer side of the steel belt layer (6); and the invention also comprises a pattern structure arranged on the tread layer (7).

2. The spare tire according to claim 1, characterized in that: The polyester carcass layer (4) has a thickness of 0.8-1.0 mm, and a breaking strength of a single polyester cord of 200-300 N; the chlorinated butyl rubber content of the inner liner (5) is ≥70%.

3. The spare tire according to claim 2, characterized in that: The steel belt layer (6) has a thickness of 0.8-1.05 mm, a breaking force of a single wire of 400-460 N, and a width and TDW single-side difference B=4-6 mm; the tire sidewall (3) has a rubber Shore A hardness of 50-56 and a tear elongation of 550-620.

4. The spare tire according to claim 3, characterized in that: The pattern structure includes a center pattern K2 and a shoulder pattern K1. The pattern is arranged by longitudinal grooves A3 and transverse "Z-shaped" grooves A4 to improve the driving stability of the tire; the center pattern K2 has evenly distributed fine grooves A2 with a length of 5 to 10 mm, a depth of 1 to 3 mm, a width of 0.6 to 0.8 mm, and an angle α of the fine grooves A2 of 145° to 155°.

5. The spare tire according to claim 4, characterized in that: The shoulder pattern K1 has evenly distributed fine grooves A1 with a length of 20 to 30 mm, a depth of 1 to 3 mm, a width of 0.6 to 0.8 mm, and a longitudinal groove A3 angle β of 140 to 155°.

6. The spare tire according to claim 5, characterized in that: The width of the tire contact surface is TDW, the longitudinal groove A3 has a width L / TDW=3%-5%, a depth of 3-5 mm, and a distance L1 from the groove to the pattern center of 13-16 mm.

7. The spare tire according to claim 6, characterized in that: The pattern of the pattern structure is arranged in disorder by three different pattern pitches, the number of pitches is 23, 24, 23, P1 / P2=1.2-1.3, P1 / P3=1.4-1.

6.

8. The spare tire according to claim 7, characterized in that: The pattern blocks of the pattern structure are staggered and adopt a "Z-type" pattern block design. The middle pattern block K2 has an angle between the transverse groove and the longitudinal groove of δ=105°, and an angle between the transverse grooves δ'=105°.

9. The spare tire according to claim 1, characterized in that: The shoulder pattern block K1 has a gentle "Z-shaped design", with the angle between the transverse groove and the longitudinal groove ω=75°, and the angle between the transverse groove and the transverse groove β=140~155°.

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