CN110171254B - Steel wire carcass passenger tire bead structure - Google Patents
Steel wire carcass passenger tire bead structure Download PDFInfo
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- CN110171254B CN110171254B CN201910560319.2A CN201910560319A CN110171254B CN 110171254 B CN110171254 B CN 110171254B CN 201910560319 A CN201910560319 A CN 201910560319A CN 110171254 B CN110171254 B CN 110171254B
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- Prior art keywords
- steel wire
- end point
- wire carcass
- reinforcing layer
- triangular glue
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 147
- 239000010959 steel Substances 0.000 title claims abstract description 147
- 239000011324 bead Substances 0.000 title claims abstract description 60
- 239000003292 glue Substances 0.000 claims abstract description 66
- 230000003014 reinforcing effect Effects 0.000 claims description 48
- 239000011800 void material Substances 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 42
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 230000007704 transition Effects 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 8
- 238000010008 shearing Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 210000001161 mammalian embryo Anatomy 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/0009—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0603—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the bead filler or apex
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a bead structure of a steel wire carcass passenger tire, and belongs to the field of steel wire carcass passenger tires. The technical scheme includes that the bead ring comprises a bead ring and a steel wire carcass ply, triangular glue is coated on the circumference of the bead ring, the triangular glue extends to an upper end point of the triangular glue along the radial direction from a lower end point of the triangular glue, the steel wire carcass ply bypasses the bottom of the bead ring and turns over to a sidewall, then extends to an anti-wrapping end point of the steel wire carcass along the radial direction, a tackifying film is arranged between the steel wire carcass ply and the triangular glue, and the anti-wrapping end point of the steel wire carcass is connected with the triangular glue through the tackifying film. The invention is applied to the steel wire carcass passenger tire, solves the problem of tire bead void caused by strong steel wire rebound of the existing steel wire carcass passenger tire, can effectively avoid stress concentration at the bead, solves the bead void, improves the product performance, and meets the characteristics of running safety of the product in various road conditions, particularly in severe road conditions.
Description
Technical Field
The invention belongs to the field of steel wire carcass passenger tires, and particularly relates to a steel wire carcass passenger tire bead structure.
Background
The steel wire tyre body is a tyre which uses steel wire to replace common polyester fiber, nylon, rayon, aramid fiber and the like in tyre body of the tyre body as tyre body material, and has the advantages of high strength, good dimensional stability, excellent heat resistance, strong adhesive force with sizing material, low cost and the like. However, compared with the common polyester cord tire body, the steel wire tire body has the characteristics of large bending rigidity and strong rebound resilience, if the conventional bead structure is used for the steel wire tire body passenger tire, the problem of bead void in the molding process and the tire blank storage period before vulcanization after molding is extremely easy to occur, and early damage is extremely easy to occur in the use process of the tire, particularly under the high-load condition.
Chinese patent CN201610951286 discloses an all-steel mud tire, and this tire pastes the one deck stiffening layer additional, and this stiffening layer is located the outside of matrix terminal point, and there is the difference in height in stiffening layer terminal point and matrix terminal point, can reduce terminal point shearing heat generation, and the intensity at reinforcing sub-mouth position effectively avoids the appearance of sub-mouth crack.
However, the problem that the steel wire rebounds can not be well solved only by adding the reinforcing layer in the patent, and the problem that the seam allowance is easily loosened still exists in the all-steel mud tire, so that the service life of the tire is influenced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the technical problem to be solved by the invention is to solve the problem of tire bead void caused by strong steel wire rebound of the existing steel wire carcass passenger tire, and the steel wire carcass passenger tire bead structure is beneficial to increasing steel wire rebound difficulty, effectively avoiding stress concentration at bead positions and solving the problem of bead void.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a bead structure of a steel wire carcass passenger tire, which comprises a bead ring and a steel wire carcass ply, wherein triangular glue is coated on the circumference of the bead ring, the triangular glue radially extends from the lower end point of the triangular glue to the upper end point of the triangular glue, the steel wire carcass ply is turned over to a sidewall by bypassing the bottom of the bead ring and then radially extends to the turn-up end point of the steel wire carcass, a tackifying film is arranged between the steel wire carcass ply and the triangular glue, and the turn-up end point of the steel wire carcass is connected with the triangular glue through the tackifying film.
Preferably, the tackifying sheet comprises an inner end point of the tackifying sheet positioned at the inner side of the triangular glue and an outer end point of the tackifying sheet positioned at the outer side of the triangular glue, wherein the radial height of the inner end point of the tackifying sheet is higher than that of the outer end point of the triangular glue, the radial distance between the inner end point of the tackifying sheet and the lower end point of the triangular glue is not less than 5mm, and the radial distance between the inner end point of the tackifying sheet and the outer end point of the triangular glue is not less than 10mm; the radial height of the outer side end point of the tackifying sheet is not lower than that of the steel wire carcass turn-up end point.
Preferably, a reinforcing layer is arranged between the steel wire carcass ply and the sidewall, the lower end of the reinforcing layer is positioned at a lower positioning point of the reinforcing layer, the upper end of the reinforcing layer is positioned at an upper positioning point of the reinforcing layer, and the steel wire carcass turn-up end point is positioned between the lower positioning point of the reinforcing layer and the upper positioning point of the reinforcing layer along the radial direction; the radial distance between the lower locating point of the reinforcing layer and the turn-up end point of the steel wire carcass is 10-20mm; the radial height of the locating point on the reinforcing layer is higher than the radial height of the endpoint on the triangular glue, and the radial distance between the locating point on the reinforcing layer and the endpoint on the triangular glue is greater than 10mm.
Preferably, the reinforcing layer makes an angle of 0-55 ° with the circumference of the tyre.
Preferably, the radial height of the end point on the apex is higher than the radial height of the end point of the steel wire carcass anti-wrapping, the radial distance between the end point on the apex and the end point of the steel wire carcass anti-wrapping is greater than 10mm, and the thickness of the apex at the joint of the end point on the apex and the end point of the steel wire carcass anti-wrapping is not less than 2mm.
Preferably, the thickness of the tackifying film is 0.5-2mm.
Preferably, the tire further comprises a rim protection lower end point which is positioned on the sidewall and connected with the rim, and the radial distance between the steel wire tire body turnup end point and the rim protection lower end point is smaller than 15mm.
Preferably, the radial height of the end point on the apex is lower than the radial height of the end point of the steel wire carcass turn-up, and the radial distance between the end point on the apex and the end point of the steel wire carcass turn-up is greater than 10mm.
Preferably, the thickness of the tackifying film is 1.0-4.0mm.
Preferably, the distance between the inner surfaces of the steel wire carcass plies located on both sides of the bead ring and the steel wire carcass turn-up end is 2.0-5.0mm; the distance between the outer surface of the steel wire carcass ply located outside the bead ring and the outer surface of the sidewall at the turn-up end of the steel wire carcass is 2.5-10mm.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a bead structure of a steel wire carcass passenger tire, which solves the problems of larger bending rigidity and high rebound resilience when a steel wire is used as a carcass material by arranging a tackifying sheet, increases the adhesiveness between a triangular rubber and a steel wire carcass ply, has the function of low heat generation and deflection resistance, and improves the service performance of the tire under complex conditions;
2. the invention provides a bead structure of a steel wire carcass passenger tire, which ensures that the stress-strain transition at the turn-up end point of the steel wire carcass is gentle and the durability of the tire is improved by arranging a reinforcing layer;
3. the invention provides a bead structure of a steel wire carcass passenger tire, which solves the problem of large transverse shearing force of the steel wire carcass turn-up end by arranging the positions of the upper end point, the lower end point and the turn-up end point of a triangular glue, avoids cutting inner side rubber under the action of stress strain, improves the performance of the tire and improves the durability of the tire;
4. the invention provides a tire bead structure for a steel wire tire body, which overcomes the problem of stress concentration when the existing bead structure is used for the tire for the steel wire tire body, and finally realizes successful research and development of the tire for the steel wire tire body by arranging a tackifying film, a reinforcing layer and triangular glue and limiting the positions and the thickness of all end points.
Drawings
FIG. 1 is a schematic view of the bead structure of a tire for a steel wire carcass passenger tire according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of the bead structure of a steel wire carcass passenger tire provided with a reinforcing layer according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the bead structure of a tire for a steel wire carcass provided in embodiment 2 of the present invention;
FIG. 4 is a schematic view of the bead structure of a tire for a steel wire carcass provided in embodiment 3 of the present invention;
FIG. 5 is an enlarged view of a portion of the bead structure A of a tire for riding on a steel wire carcass provided in example 3 of the present invention;
in the above figures: 1. a bead ring; 2. a steel wire carcass ply; 21. the steel wire carcass is reversely wrapped at the end points; 3. triangular glue; 31. a lower end point of the triangular glue; 32. the end points of the triangular glue; 4. a tackifying film; 41. an inner end point of the tackifying adhesive sheet; 42. an outer end point of the tackifying adhesive sheet; 5. a reinforcing layer; 51. locating points below the reinforcing layer; 52. positioning points on the reinforcing layer; 6. the rim protects the lower end point; 7. a sidewall.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in fig. 1, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1: as shown in fig. 1, the invention provides a bead structure of a steel wire carcass passenger tire, which comprises a bead ring 1 and a steel wire carcass ply 2, wherein triangular glue 3 is coated on the circumference of the bead ring 1, the triangular glue 3 extends from a lower end point 31 of the triangular glue to an end point 32 of the triangular glue in the radial direction, the steel wire carcass ply 2 turns over to a sidewall 7 around the bottom of the bead ring 1 and then extends to an anti-wrapping end point 21 of the steel wire carcass in the radial direction, a glue adding sheet 4 is arranged between the steel wire carcass ply 2 and the triangular glue 3, and the anti-wrapping end point 21 of the steel wire carcass is connected with the triangular glue 3 through the glue adding sheet 4. When the steel wire is used as a carcass material, the problems of high bending rigidity and high rebound resilience exist, meanwhile, the problem of poor viscosity between the steel wire carcass ply 2 and the bead ring 1 exists, and the phenomenon of seam allowance void is easily caused, so that the quality of the tire is influenced. Through setting up the viscose 4 that increases between steel wire carcass ply 2 and apex 3, increased the degree of difficulty that the steel wire kick-backed, increased simultaneously the cohesiveness between apex 3 and the steel wire carcass ply 2 to have the effect of low heat generation deflection resistance, improve the performance of tire under the complex condition. It should be noted that, this embodiment also defines that the steel wire carcass turn-up end point 21 is connected with the apex 3 through the adhesion promoting sheet 4, because the steel wire carcass has the problems of large bending rigidity and high rebound resilience when in turn-up, if the steel wire carcass ply 2 is directly contacted with the apex 3, under the condition of constant temperature and humidity, the blank storage 2-6h sub-opening position will have the problem of void, which is not beneficial to the storage of the blank; by adding the tackifying adhesive sheet 4 between the apex 3 and the carcass ply 2, the storage time of the embryo is prolonged to 16-20 hours, the storage time of the embryo is prolonged, the appearance quality of the embryo is improved, and the problem of seam allowance void is relieved.
In order to further increase the steel wire rebound difficulty and improve the adhesiveness between the apex 3 and the steel wire carcass ply 2, the tackifying sheet 4 comprises an inner tackifying sheet end 41 positioned at the inner side of the apex 3 and an outer tackifying sheet end 42 positioned at the outer side of the apex 3, the radial height of the inner tackifying sheet end 41 is higher than that of the apex end 32, the radial distance between the inner tackifying sheet end 41 and the apex lower end 31 is not less than 5mm, and the radial distance between the inner tackifying sheet end 41 and the apex end 32 is not less than 10mm; the radial height of the outer end point 42 of the adhesion promoter is not lower than the radial height of the steel wire carcass turn-up end point 21. The arrangement of the positions of the outer end points 42 of the tackifying sheets ensures that the tackifying sheets 4 attach or wrap the edges of the steel wire carcass ply 2, is beneficial to increasing the rebound difficulty of steel wires and prevents the phenomenon of seam allowance void. In order to ensure the dimensional stability of the tackifying sheet 4 in the production process and have a stronger tackifying effect, the Shore hardness of the tackifying sheet 4 is 65-78.
As shown in fig. 2, in order to ensure that the stress-strain transition at the steel wire carcass turn-up end point 21 is gentle and improve the durability of the tire, a reinforcing layer 5 is arranged between the steel wire carcass ply 2 and the sidewall 7, the lower end of the reinforcing layer 5 is positioned at a reinforcing layer lower positioning point 51, the upper end of the reinforcing layer 5 is positioned at a reinforcing layer upper positioning point 52, and the steel wire carcass turn-up end point 21 is positioned between the reinforcing layer lower positioning point 51 and the reinforcing layer upper positioning point 52 in the radial direction; the radial distance between the lower locating point 51 of the reinforcing layer and the steel wire carcass turn-up end point 21 is 10-20mm; the radial height of the anchor point 52 on the stiffening layer is higher than the radial height of the end point 32 on the apex, and the radial distance between the anchor point 52 on the stiffening layer and the end point 32 on the apex is greater than 10mm. In the tire, if the hardness or stress transition of the product is uneven, damage easily occurs at the uneven transition point, the tire is repeatedly deformed during running, and early damage easily occurs at the uneven stress transition point. The steel wire carcass turn-up end point 21 of the steel wire carcass belongs to a stress concentration point, and the hardness difference between the steel wire and surrounding materials is large, so that the seam allowance reinforcement layer 5 is required to carry out hardness transition. In addition, the embodiment specifically defines the end point position of the reinforcing layer 5, because the arrangement mode of the end point of the reinforcing layer 5 directly affects whether the reinforcing layer 5 can smooth the key factor of stress-strain transition at the steel wire carcass turn-up end point 21, the embodiment specifically defines the end point position of the reinforcing layer 5, on one hand, the scheme is implemented, on the other hand, the steel wire carcass turn-up end point 21 is favorable for being hooped, rebound is relieved, the steel wire carcass turn-up end point 21 is wrapped through the reinforcing layer 5, shear stress is reduced, early damage of a tire is prevented, and the service life of the tire is prolonged. As a material of the reinforcing layer 5, a material such as nylon 6, nylon 66, polyester, or steel wire may be used.
In order to achieve the realisation of the tyre building process, the reinforcing layer 5 makes an angle of 0-55 ° with the tyre circumference. Because in practical application, if the angle is 90 degrees, the reverse wrapping cannot be realized on the one-time forming machine due to the too large circumferential tightening force.
Example 2: as shown in fig. 3, this embodiment provides a bead structure for a steel wire carcass, wherein the radial height of the apex end 32 is higher than the radial height of the steel wire carcass turn-up end 21, the radial distance between the apex end 32 and the steel wire carcass turn-up end 21 is greater than 10mm, and the thickness of the apex 3 at the connection with the steel wire carcass turn-up end 21 is not less than 2mm. Considering that the transverse shear force of the steel wire carcass turn-up end point 21 is large, the embodiment limits the thickness of the apex adhesive end point 32, the steel wire carcass turn-up end point 21 and the apex adhesive 3 at the joint of the steel wire carcass turn-up end point 21, and avoids cutting the inner side adhesive under the action of stress strain. Through the design, the tire for the steel wire carcass passenger can avoid the fracture of the triangular rubber 3 under the hard impact under the high-speed running condition, and the running safety of the tire is improved. In order to meet the requirements of the triangular glue 3 on thickness, the cutting of the inner side glue stock under the action of stress is avoided, and the Shore hardness of the triangular glue 3 is 72-92.
In order to avoid early damage to the seam allowance caused by excessive shearing force between the steel wire carcass turnup end point 21 and the ply, the thickness of the tackifying adhesive sheet 4 is 0.5-2mm.
Further, the tire further comprises a rim protection lower end point 6 which is positioned on the sidewall 7 and connected with the rim, and the radial distance between the steel wire tire body turn-up end point 21 and the rim protection lower end point 6 is smaller than 15mm. The tire bead structure for steel wire carcass riding in this embodiment is used for the tire bead structure for steel wire carcass riding in which rim protection is provided, and by limiting the radial distance between the steel wire carcass turn-up end point 21 and the rim protection lower end point 6 to be less than 15mm, the cutting of the outer side rubber material under the action of stress strain is avoided. Through the design, the inner side of the steel wire carcass turn-up end point 21 is ensured to be the triangular glue 3, the outer side is the compound point of the wear-resistant glue and the side wall 7 glue, the transition from hard to soft of the stress is favorable for stress dispersion, and the service life of the tire is prolonged. The seed opening structure is mainly used for a steel wire carcass passenger tire with rim protection and specifically comprises a tire series such as HP, UHP, HT, AT, MT, ST, LT.
Example 3: as shown in fig. 4, this embodiment provides another tire bead structure for a tire carcass, wherein the radial height of the apex 32 is lower than the radial height of the steel carcass turn-up end 21, and the radial distance between the apex 32 and the steel carcass turn-up end 21 is greater than 10mm. Considering that the transverse shearing force of the steel wire carcass turn-up end point 21 is large, the embodiment limits the triangular glue upper end point 32 and the steel wire carcass turn-up end point 21, and avoids cutting the inner side sizing material under the action of stress strain. Through the design, the inner side of the steel wire carcass turn-up end point 21 is ensured to be the triangular glue 3, the outer side is the compound point of the wear-resistant glue and the side wall 7 glue, the transition from hard to soft of the stress is favorable for stress dispersion, and the service life of the tire is prolonged. The seed opening structure is mainly used for the series of tires such as HP, UHP, HT, AT, MT, ST, LT.
In order to avoid early damage to the seam allowance caused by excessive shearing force between the steel wire carcass turnup end point 21 and the ply, the thickness of the tackifying sheet 4 is 1.0-4.0mm.
Further, the distance between the inner surfaces of the carcass plies 2 on both sides of the bead ring 1 at the turn-up end 21 of the carcass is 2.0 to 5.0mm; the distance between the outer surface of the carcass ply 2 located outside the bead ring 1 and the outer surface of the sidewall 7 at the carcass turn-up end 21 is 2.5-10mm. The arrangement mainly considers the problem of large transverse shearing force of the steel wire carcass turn-up end point 21, and avoids cutting of the outer sizing material under the action of stress strain. As shown in fig. 5, the distance between the inner surfaces of the carcass plies 2 on both sides of the bead ring 1 at the turn-up end 21 of the carcass is d in fig. 5 1 The distance shown is d in FIG. 5 between the outer surface of the carcass ply 2 outside the bead ring 1 and the outer surface of the sidewall 7 at the turn-up end 21 of the carcass 2 The distance represented.
The following describes the bead structure of the steel wire carcass passenger tire provided by the invention through specific cases:
case 1:
selecting 245/45ZR18 specification for development and research, wherein the steel wire carcass ply 2 adopts 3+9 x 0.175NT steel wires, the rolling density is 60EPD, the rolling thickness is 1.8mm, the design width of the steel wire carcass ply 2 is 480mm, and the falling point position of the steel wire carcass turn-up end point 21 is ensured to be lower than the position of the vertical distance 3mm of the lower end point 6 of rim protection;
the glue adding sheet 4 is made of glue stock with Shore hardness of 69, the thickness of the glue stock is 0.7mm, the width of the glue stock is 80mm, the outer end point 42 of the glue adding sheet is attached to the steel wire carcass anti-wrapping end point 21 in a flush manner, and the vertical distance between the inner end point 41 of the glue adding sheet and the end point 32 of the triangular glue is 5mm after the glue adding sheet is reversely wrapped;
the triangular glue 3 is made of glue material with Shore hardness of 90, the design height is 35mm, the falling point of the steel wire carcass turn-up end point 21 is lower than the vertical distance 13mm of the triangular glue end point 32 after the steel wire carcass ply 2 is turned up, and meanwhile, the thickness of the triangular glue 3 at the steel wire carcass turn-up end point 21 is 3mm;
the nylon 66 material is used as the seam allowance reinforcing layer 5, the calendaring thickness is 1.15mm, the cutting angle is 50 degrees, the cutting width is 55mm, the single-layer adhesive is attached, the internal positioning in the adhesive is 215mm, the external positioning is 270mm, the lower positioning point 51 of the seam allowance reinforcing layer is lower than 15mm at the steel wire carcass anti-wrapping end point 21, and the upper positioning point 52 of the reinforcing layer is higher than 15mm at the triangular adhesive end point 32.
Comparative cases:
the tire bead structure for the steel wire tire body is the same as the tire bead structure for the steel wire tire body provided by the invention, and the difference is that: the sub-opening structure is not provided with the tackifying glue sheet 4.
According to the invention, the tackifying adhesive sheet 4 is added between the steel wire carcass ply 2 and the steel wire ring 1, so that the purposes of improving the shearing between the steel wire ring 1 and the steel wire carcass ply 2, improving the adhesiveness and prolonging the storage period of a green tire are achieved. The problem of the sub-opening void occurs only after the 245/45R18 (steel wire carcass) embryo is stored for 16-20h in the case 1 of the invention, while the phenomenon of the sub-opening void occurs after the 245/45R18 (steel wire carcass, without adding the tackifying sheet) embryo without the tackifying sheet is stored for 2-6h in the comparative case. Machine tool test:
machine tool tests were performed on steel wire carcasses of the sub-mouth structure of case 1 and comparative case, and on the existing 245/45R18 polyester carcasses, and the test results are shown in Table 1:
table 1 carcass machine tool test results
According to the test analysis of the machine tool, various indexes of the steel wire carcass passenger tire are improved relative to those of a normal semisteel tire, the bead structure of the steel wire carcass passenger tire is reasonable and feasible in design, and the product of the invention can be suitable for various road conditions, and is longer in service life and higher in safety.
Claims (8)
1. The bead structure for the steel wire carcass passenger tire comprises a bead ring (1) and a steel wire carcass ply (2), wherein triangular glue (3) is coated on the circumference of the bead ring (1), the triangular glue (3) radially extends from a triangular glue lower end point (31) to a triangular glue upper end point (32), and the steel wire carcass ply (2) radially extends to a steel wire carcass turn-up end point (21) after bypassing the bottom of the bead ring (1) and turning over to a tire side (7), and is characterized in that a tackifying film (4) is arranged between the steel wire carcass ply (2) and the triangular glue (3), and the steel wire carcass turn-up end point (21) is connected with the triangular glue (3) through the tackifying film (4);
the tackifying film (4) comprises a tackifying film inner side end point (41) positioned on the inner side of the triangular glue (3) and a tackifying film outer side end point (42) positioned on the outer side of the triangular glue (3), wherein the radial height of the tackifying film inner side end point (41) is higher than that of the triangular glue end point (32), the radial distance between the tackifying film inner side end point (41) and the triangular glue lower end point (31) is not less than 5mm, and the radial distance between the tackifying film inner side end point (41) and the triangular glue end point (32) is not less than 10mm; the radial height of the outer side end point (42) of the tackifying sheet is not lower than the radial height of the steel wire carcass turn-up end point (21);
a reinforcing layer (5) is arranged between the steel wire carcass ply (2) and the sidewall (7), the lower end of the reinforcing layer (5) is positioned at a reinforcing layer lower locating point (51), the upper end of the reinforcing layer (5) is positioned at a reinforcing layer upper locating point (52), and the steel wire carcass turn-up end point (21) is positioned between the reinforcing layer lower locating point (51) and the reinforcing layer upper locating point (52) along the radial direction; the radial distance between the lower locating point (51) of the reinforcing layer and the steel wire carcass turn-up end point (21) is 10-20mm; the radial height of the locating point (52) on the reinforcing layer is higher than that of the endpoint (32) on the apex, and the radial distance between the locating point (52) on the reinforcing layer and the endpoint (32) on the apex is greater than 10mm.
2. A bead structure according to claim 1, characterized in that the reinforcing layer (5) makes an angle of 0-55 ° with the tyre circumference.
3. The seam structure according to claim 1 or 2, characterized in that the radial height of the apex (32) is lower than the radial height of the wire carcass turn-up end (21), the radial distance of the apex (32) from the wire carcass turn-up end (21) being greater than 10mm.
4. A seam structure according to claim 3, characterized in that the thickness of the apex (3) where the apex (32) joins the wire carcass turnup (21) is not less than 2mm.
5. The child-mouth structure according to claim 4, wherein the thickness of the tackifying film (4) is 0.5-2mm.
6. The bead structure according to claim 4, further comprising a rim protection lower end point (6) located at the sidewall (7) and connected to the rim, the radial distance between the wire carcass turnup end point (21) and the rim protection lower end point (6) being less than 15mm.
7. The child-mouth structure according to claim 4, wherein the thickness of the tackifying film (4) is 1.0-4.0mm.
8. A bead structure according to claim 4, wherein the distance between the inner surfaces of the carcass ply (2) on both sides of the bead ring (1) at the turn-up end (21) of the carcass is 2.0-5.0mm; the distance between the outer surface of the steel wire carcass ply (2) located outside the bead ring (1) and the outer surface of the sidewall (7) at the steel wire carcass turn-up end (21) is 2.5-10mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910560319.2A CN110171254B (en) | 2019-06-26 | 2019-06-26 | Steel wire carcass passenger tire bead structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910560319.2A CN110171254B (en) | 2019-06-26 | 2019-06-26 | Steel wire carcass passenger tire bead structure |
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| CN110171254A CN110171254A (en) | 2019-08-27 |
| CN110171254B true CN110171254B (en) | 2024-03-01 |
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|---|---|---|---|---|
| JPH0725213A (en) * | 1993-07-13 | 1995-01-27 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2004249765A (en) * | 2003-02-18 | 2004-09-09 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2008094116A (en) * | 2006-10-05 | 2008-04-24 | Sumitomo Rubber Ind Ltd | Pneumatic tire and its manufacturing method |
| JP2012218528A (en) * | 2011-04-06 | 2012-11-12 | Sumitomo Rubber Ind Ltd | Tire for heavy load |
| JP2013177052A (en) * | 2012-02-28 | 2013-09-09 | Bridgestone Corp | Pneumatic tire |
| CN105172483A (en) * | 2015-07-24 | 2015-12-23 | 山东玲珑轮胎股份有限公司 | Tire bead filler core |
| JP2018099850A (en) * | 2016-12-21 | 2018-06-28 | 東洋ゴム工業株式会社 | Method for manufacturing pneumatic tire |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4464700B2 (en) * | 2004-01-28 | 2010-05-19 | 住友ゴム工業株式会社 | Pneumatic tire and manufacturing method thereof |
| JP2006137252A (en) * | 2004-11-10 | 2006-06-01 | Bridgestone Corp | High performance low-profile tire for passenger four-wheeled car and installation method of tire |
| JP4830028B2 (en) * | 2009-03-06 | 2011-12-07 | 住友ゴム工業株式会社 | Heavy duty radial tire |
-
2019
- 2019-06-26 CN CN201910560319.2A patent/CN110171254B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725213A (en) * | 1993-07-13 | 1995-01-27 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2004249765A (en) * | 2003-02-18 | 2004-09-09 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2008094116A (en) * | 2006-10-05 | 2008-04-24 | Sumitomo Rubber Ind Ltd | Pneumatic tire and its manufacturing method |
| JP2012218528A (en) * | 2011-04-06 | 2012-11-12 | Sumitomo Rubber Ind Ltd | Tire for heavy load |
| JP2013177052A (en) * | 2012-02-28 | 2013-09-09 | Bridgestone Corp | Pneumatic tire |
| CN105172483A (en) * | 2015-07-24 | 2015-12-23 | 山东玲珑轮胎股份有限公司 | Tire bead filler core |
| JP2018099850A (en) * | 2016-12-21 | 2018-06-28 | 東洋ゴム工業株式会社 | Method for manufacturing pneumatic tire |
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| CN110171254A (en) | 2019-08-27 |
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