CN211364174U - Pneumatic tire for endurance race - Google Patents
Pneumatic tire for endurance race Download PDFInfo
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- CN211364174U CN211364174U CN201922337382.8U CN201922337382U CN211364174U CN 211364174 U CN211364174 U CN 211364174U CN 201922337382 U CN201922337382 U CN 201922337382U CN 211364174 U CN211364174 U CN 211364174U
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Abstract
The utility model discloses a pneumatic tire for endurance race, which comprises a tire crown part, a tire shoulder part, a tire side part and a tire bead part, wherein the tire comprises triangular rubber wrapping cloth, tire bead steel wires, reinforcing layers, triangular rubber, a first cord fabric layer and a second cord fabric layer which are symmetrically arranged at two sides of the tire; the bead ring is embedded in the bead part, the lower end of the apex is fixedly connected with the bead wire, and the apex extends upwards along the outline; the first cord fabric layer extends from the crown part to the bead part along the contour direction and is turned around the bead wire from the inner side of the tire axial direction to the outer side of the tire axial direction to form a first turning part; through adjusting the height and the end point position of the triangular rubber wrapping cloth, and simultaneously using the structure of the first cord fabric layer reverse wrapping and the second cord fabric layer forward wrapping, the rigidity transition of the side wall of the tire is uniform, and the control performance of the tire is improved.
Description
Technical Field
The utility model relates to a tire field, concretely relates to pneumatic tire for endurance match.
Background
The endurance race tire is one of racing tires, and is specially used for endurance races, and compared with a field race tire, the endurance race tire has higher impact resistance and durability and also needs to have higher control performance, and the control performance is one of key indexes of whether racing cars can run out.
The prior art adopts low turn-up structure more, increase the apex height, increase the apex infantees, increase the side wall rigidity that side wall reinforcing material promoted the tire, and then improve the tire and control the performance, but the race tire all is low flat tire, its side wall region is narrower, use low turn-up structure and increase side wall reinforcing material etc. can cause the regional extreme point of side wall lower half more and stress concentration, and the first half of side wall does not have other skeleton material except that the matrix curtain cloth, the rigidity is weaker, lead to on the side wall, the lower part rigidity is excessive not gentle, lead to the tire to appear turning to the responsiveness poor when the match, the response lags, make the tire control the performance poor, the racing car crosses the curved speed low.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a pneumatic tire for endurance match through adjustment apex infantees height and extreme point position, uses first ply turn-up structure of second ply turn-up in addition simultaneously, makes the side wall rigidity transition of tire even, has improved controlling the performance of tire.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a pneumatic tire for endurance race comprises a crown part, a shoulder part, a sidewall part and a bead part, and comprises triangular rubber coated fabric, bead wires, a reinforcing layer, triangular rubber, a first cord fabric layer and a second cord fabric layer which are symmetrically arranged at two sides of the tire; the bead ring is embedded in the bead part, the lower end of the apex is fixedly connected with the bead wire, and the apex extends upwards along the outline; the first cord fabric layer extends from the crown part to the bead part along the contour direction and is turned around the bead wire from the inner side of the tire axial direction to the outer side of the tire axial direction to form a first turning part; the apex filler is arranged between the first cord fabric layer and the apex, extends from the tire shoulder part to the tire bead part along the contour direction, and is turned around the tire bead wire from the inner side of the tire axial direction to the outer side of the tire axial direction to form a second turning part; the reinforcing layer extends from the side wall part to the bead part along the contour direction and is arranged on the outer side of the first turning part; the second cord fabric layer extends from the crown portion to the bead portion along the contour direction, is wrapped from the axial outer side of the tire to the axial inner side of the tire around the bead wire to form a third turning portion, and wraps the first turning portion, the second turning portion and the reinforcing layer.
Further, the pneumatic tire further comprises a belt layer comprising a first belt layer located at a lower portion and a second belt layer located at an upper portion, the first belt layer being 20mm to 56mm wider than the second belt layer.
Further, the radial height H4 from the upper end point of the bead filler located on the inner side of the tire axial direction to the bead heel is 0.7 SH-0.9 SH, wherein SH is the radial height from the highest point of the tire to the bead heel.
Further, the radial height H1 from the upper end point of the third turnback part to the bead heel is 5-25 mm.
Further, the height HBF of the apex is 0.3 SH-0.5 SH, wherein SH is the radial height from the highest point of the tire to the heel.
Furthermore, the upper end point of the reinforcing layer is higher than the upper end point of the bead filler, the radial height difference H3 between the upper end point and the bead filler is 5-10 mm, and the radial height difference H2 between the lower end point of the reinforcing layer and the bead heel is 0-10 mm.
Compared with the prior art, the utility model has the advantages that:
1. through adjusting apex infantees height and extreme point position, use the structure of first ply turn-up plus second ply turn-up simultaneously, the extreme point of dispersion bead portion and side wall lower half has reduced the stress concentration degree of side wall lower half to supply the material of side wall upper half, make the side wall rigidity transition of tire even, improved the control performance of tire.
Drawings
Fig. 1 is a schematic overall structure diagram of the present invention;
FIG. 2 is a schematic structural view of a first belt and a second belt of the present invention;
FIG. 3 is a schematic structural view of a first ply and a second ply of the present invention;
fig. 4 is a schematic structural diagram of the height of the apex of the present invention.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, a pneumatic tire for endurance race includes a crown portion 1, a shoulder portion 2, a sidewall portion 3, and a bead portion 4, including an apex 30, a bead wire 40, a reinforcing layer 50, an apex 60, and a first ply 10, a second ply 20, which are symmetrically disposed at both sides of the tire; the bead ring is embedded in the bead part, the lower end of the apex is fixedly connected with the bead wire, and the apex extends upwards along the outline; the first ply 10 extends from the crown portion to the bead portion in the profile direction, and is turned up around a bead wire from the tire axial inside toward the tire axial outside to form a first turnback portion 10 a; the apex fabric 30 is provided between the first ply and the apex, extends from the shoulder portion to the bead portion in the profile direction, and is turned up around the bead wire from the tire axial inner side toward the tire axial outer side to form a second turn-up portion 30 a; the reinforcing layer 50 extends from the sidewall portion to the bead portion in the contour direction, and is disposed outside the first turnback portion; the second ply 20 extends from the crown portion to the bead portion in the profile direction, is wrapped around the bead wire from the tire axial outside to the tire axial inside to form a third turn-back portion 20a, and wraps the first turn-back portion, the second turn-back portion, and the reinforcing layer therein.
The first cord fabric layer and the second cord fabric layer are made of nylon materials, and the impact resistance and the durability of the tire are guaranteed.
As shown in fig. 1 to 4, the pneumatic tire further comprises a belt layer comprising a first belt layer 71 located at a lower portion and a second belt layer 72 located at an upper portion, the first belt layer being 20mm to 56mm wider than the second belt layer; the radial height H4 from the upper end point F of the triangular rubber wrapping cloth positioned on the inner side of the axial direction of the tire to the bead heel is 0.7 SH-0.9 SH, wherein SH is the radial height from the highest point of the tire to the bead heel; SH is the radial height from the highest point of the tire to the bead heel, and concretely refers to 1/2 of the difference between the outer diameter of the tire and the diameter of a rim when the tire is installed on an applicable rim, filled with specified air pressure and in a no-load state; since the diameter of the rim is standardized, it is necessary to set the required tire height by SH, and usually, in order to improve the handling performance, the racing tire is designed to have low flatness, i.e., the ratio of SH to the widest part of the tire is small, typically between 30% and 40%.
The position of F is higher, extends to the bead portion from the tire shoulder portion, can effectively improve the rigidity of the upper half portion of side wall, makes the rigidity transition of the upper and lower portion of side wall more even, has improved the manipulation performance of tire.
Comparative example 1: the first ply and the second ply were turned up, the first belt layer was wider than the second belt layer by 15mm, and the radial height H4 from the upper end point F of the apex fabric located on the inner side in the tire axial direction to the bead heel B was 0.6 SH.
Example 1: the first ply was turned up and the second ply was turned up, the first belt layer was wider than the second belt layer by 20mm, and the radial height H4 from the upper end point F of the apex cloth located on the inner side in the tire axial direction to the butt B was 0.7 SH.
Example 2: the first ply was turned up and the second ply was turned up, the first belt layer was 38mm wider than the second belt layer, and the radial height H4 from the upper end point F of the apex cloth located on the inner side in the tire axial direction to the butt B was 0.8 SH.
Example 3: the first ply was turned up and the second ply was turned up, the first belt layer was 56mm wider than the second belt layer, and the radial height H4 from the upper end point F of the apex cloth located on the inner side in the tire axial direction to the butt B was 0.9 SH.
Comparative example 2: the first ply and the second ply were turned up, the first belt layer was wider than the second belt layer by 60mm, and the radial height H4 from the upper end point F of the apex fabric located on the inner side in the tire axial direction to the bead heel B was 0.95 SH.
The turn-up in the above comparative example means wrapping toward the tire axial direction outer side from the tire axial direction inner side around the bead wire, and the turn-up means wrapping toward the tire axial direction inner side from the tire axial direction outer side around the bead wire; SH is the radial height from the highest point of the tire to the heel.
Tests were carried out on tires having a specification of 310/705-18 for the above comparative examples and examples.
Rigidity test conditions: air pressure: 210kpa, load: 350 kg;
grounding test conditions: air pressure: 210kpa, load: 350 kg;
professional track test conditions: the hot air pressure of the tire is 210kpa, the load is 350kg, and the inclination angle is 3 degrees; germany nurgring GP Sprint racetrack, full-length racetrack: 5.148 km.
And (3) test results:
the circle speed is the time taken for a racing car to travel one circle around the track, the squareness ratio represents the shape of the footprint of the tire on the ground, and the higher the squareness ratio, the more fully the tire is in contact with the ground and the better the grip performance.
It can be known from the result, compare in the comparative example, when first ply turn-up, second ply are just being wrapped, first belted layer is than the second belted layer wide 20mm ~56mm, and the radial height H4 that lies in the upper end F of the inboard apex of tire axial to bead heel B is 0.7SH ~0.9SH, and its rigidity performance promotes, and the rectangle rate is higher, and the circle speed is shorter, demonstrates the utility model discloses a control performance is better.
As shown in fig. 1 to 4, the radial height H1 from the upper end point a of the third turn-up portion 20a to the heel is 5mm to 25 mm; the height HBF of the apex 60 is 0.3 SH-0.5 SH, wherein SH is the radial height from the highest point of the tire to the heel of the tire; the upper end point E of the reinforcing layer is higher than the upper end point D of the bead filler, the radial height difference H3 between the upper end point E and the upper end point D of the bead filler is 5-10 mm, and the radial height difference H2 between the lower end point C of the reinforcing layer and the bead heel B is 0-10 mm; the end point values are set in a mode that the end point density of the tire bead part and the lower half part of the tire side is dispersed, stress concentration is further reduced, and the rigidity transition of the upper portion and the lower portion of the tire side is uniform by matching with other structural designs, so that the steering sensitivity can be effectively improved, and the control performance is improved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A pneumatic tire for endurance race, comprising a crown portion (1), a shoulder portion (2), a sidewall portion (3), and a bead portion (4), characterized in that: the tire comprises bead filler infantees (30), bead wires (40), a reinforcing layer (50), bead fillers (60), a first cord fabric layer (10) and a second cord fabric layer (20), which are symmetrically arranged on two sides of a tire; the bead wire is embedded in the bead part, the lower end of the apex is fixedly connected with the bead wire, and the apex extends upwards along the outline; the first ply (10) extends from the crown portion to the bead portion in the profile direction and is turned up around the bead wire from the tire axial inner side toward the tire axial outer side to form a first turnback portion (10 a); the apex fabric (30) is arranged between the first ply and the apex, extends from the shoulder part to the bead part along the contour direction, and is turned around the bead wire from the inner side of the tire axial direction to the outer side of the tire axial direction to form a second turning part (30 a); the reinforcing layer (50) extends from the sidewall portion to the bead portion in the contour direction and is arranged outside the first turnback portion; the second ply (20) extends from the crown part to the bead part along the contour direction, is wrapped around a bead wire from the axial outer side of the tire to the axial inner side of the tire to form a third turn-back part (20 a), and wraps the first turn-back part, the second turn-back part and the reinforcing layer.
2. A pneumatic tire for endurance events according to claim 1, wherein: the pneumatic tire further comprises a belt layer, wherein the belt layer comprises a first belt layer (71) located at the lower part and a second belt layer (72) located at the upper part, and the first belt layer is 20 mm-56 mm wider than the second belt layer.
3. A pneumatic tire for endurance events according to claim 2, wherein: the radial height H4 from the upper end point (F) of the triangular rubber wrapping cloth positioned on the inner side of the axial direction of the tire to the bead heel is 0.7 SH-0.9 SH, wherein SH is the radial height from the highest point of the tire to the bead heel.
4. A pneumatic tire for endurance events according to claim 1, wherein: the radial height H1 from the upper end point (A) of the third turn-up part (20 a) to the bead heel is 5-25 mm.
5. A pneumatic tire for endurance events according to claim 4, wherein: the height HBF of the triangular rubber (60) is 0.3 SH-0.5 SH, wherein SH is the radial height from the highest point of the tire to the heel of the tire.
6. A pneumatic tire for endurance events according to claim 4, wherein: the upper end point (E) of the reinforcing layer is higher than the upper end point (D) of the bead filler, the radial height difference H3 between the upper end point and the bead filler is 5 mm-10 mm, and the radial height difference H2 between the lower end point (C) of the reinforcing layer and the bead heel (B) is 0 mm-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922337382.8U CN211364174U (en) | 2019-12-23 | 2019-12-23 | Pneumatic tire for endurance race |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922337382.8U CN211364174U (en) | 2019-12-23 | 2019-12-23 | Pneumatic tire for endurance race |
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| Publication Number | Publication Date |
|---|---|
| CN211364174U true CN211364174U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922337382.8U Active CN211364174U (en) | 2019-12-23 | 2019-12-23 | Pneumatic tire for endurance race |
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| CN (1) | CN211364174U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115257244A (en) * | 2022-08-01 | 2022-11-01 | 山东玲珑轮胎股份有限公司 | High-durability SUV tire |
-
2019
- 2019-12-23 CN CN201922337382.8U patent/CN211364174U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115257244A (en) * | 2022-08-01 | 2022-11-01 | 山东玲珑轮胎股份有限公司 | High-durability SUV tire |
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