CN205601517U - Heavy -load pneumatic tire - Google Patents
Heavy -load pneumatic tire Download PDFInfo
- Publication number
- CN205601517U CN205601517U CN201620362992.7U CN201620362992U CN205601517U CN 205601517 U CN205601517 U CN 205601517U CN 201620362992 U CN201620362992 U CN 201620362992U CN 205601517 U CN205601517 U CN 205601517U
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- China
- Prior art keywords
- tire
- heavy
- enhancement layer
- bead core
- organic
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Classifications
-
- 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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- 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
- B60C15/0653—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer with particular configuration of the cords in the respective bead reinforcing layer
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The utility model provides a heavy -load pneumatic tire which is constructed to be become to install on 15 drop center rim and includes: the matrix layer, its cyclic annular extension in order to turn back round a pair of tire bead core, the layer is restrainted in the area, and it arranges the radial outside of tire on the matrix layer, the tread, it arranges the radial outside of tire of restrainting the layer in the area, and organic enhancement layer, its the tire width direction who arranges at least at each tire bead core outside to the reinforcing cord of stranded organic fibre is buried underground to inside. Aerify to the condition of pressure in the standard under at heavy -load pneumatic tire, the cross -section focus G of each tire bead core is constructed the position in the radial outside of the radial outer end of tire of the rim flange that becomes to be located drop center rim to to press in 1.5~2.5 times of standards under the hypothesis that forces down the use in at heavy -load pneumatic tire, and bury underground and be more than 60 for the radial inclination A of tire strengthening intraformational reinforcing cord organically. Even under the circumstances of tire inflation pressure to high in, also can suppress effectively and bury breaking at the reinforcing cord that strengthens intraformational organic fibre organically underground.
Description
Technical field
This utility model relates to be assemblied in 15 ° of drop center rims (drop center rim) and have layout
At the outside of bead core, the enhancement layer that is embedded with organic fiber heavy-duty pneumatic tire.
Background technology
For example, as it is known that traditional heavy duty inflation that such as Japanese Unexamined Patent Publication 07-101212 publication etc. describe
Tire.
This heavy-duty pneumatic tire includes: body piles, its at the both ends of tire width direction around pair of bead
Core turns back and with ring-type extension；Belt, it is arranged in the tire radial outside of body piles；Tyre surface,
It is arranged in the tire radial outside of belt；And organic enhancement layer, it is arranged at each bead core
Outside tire width direction, and inside is embedded with the reinforcing cord of multiply organic fiber.It is embedded in organic
Reinforcing cord in enhancement layer relative to tire angle of inclination radially in the range of 40 °～50 °.
In recent years, some countries beyond Japan, exist and make heavy load truck etc. travel under following state
Trend: the pneumatic tire of all pneumatic tires as described above etc. be assembled on 15 ° of drop center rims and
It is inflated to 1.5～2.5 times of intrinsic pressure high internal pressure of standard.In response in the trial of this trend, the present inventor increases
The big area of section of bead core.But, the area of section only increasing bead core as described above can produce
Following problem.
That is, in the case of pneumatic tire is inflated to the most above-mentioned etc. high internal pressure, the bead part quilt of tire
High internal pressure is strongly pressed in the rim flange of wheel rim.Rubber between rim flange and each bead core
Deform by this pressure extrusion and in the way of bloating towards tire radial outside.As a result, organic enhancement layer
Interior reinforcing cord is pulled by rubber, thus is stretched diametrically and disrumpent feelings.Tyre width at cord
The cracks can spread occurred in rubber (chafer rubber) outside direction, to the outer surface of bead part, has
Time bead part can move in low rim flange.
Utility model content
Even if the purpose of the disclosure is to provide in the case of tyre inflating to high internal pressure, it is also possible to effectively
The heavy duty tire ruptured of the reinforcing cord of the organic fiber that ground suppression is embedded in organic enhancement layer.
A kind of heavy-duty pneumatic tire, it is configured to be installed on 15 ° of drop center rims, described heavy duty inflation
Tire includes:
Body piles, it is to turn back around the pair of bead core at the width both ends of described body piles
Ring-type extension；
Belt, it is arranged in the tire radial outside of described body piles；
Tyre surface, it is arranged in the tire radial outside of described belt；And
Organic enhancement layer, it is arranged at outside the tire width direction of each bead core, and inside is buried
It is provided with the reinforcing cord of multiply organic fiber, wherein:
Described heavy-duty pneumatic tire be inflated to standard intrinsic pressure in the case of, the centroid of section G of each bead core
It is configured to be positioned at the position of the radial outside of the tire radial outer end of the rim flange of described drop center rim,
And
Under the hypothesis that the interior pressure intrinsic pressure 1.5～2.5 times of standards is used by described heavy-duty pneumatic tire, bury
The described reinforcing cord being located in described organic enhancement layer is 60 ° relative to the angle of inclination A of tire radial direction
Above.
Preferably, the described reinforcing cord being embedded in described organic enhancement layer inclines relative to tire radial direction
Rake angle A is in the range of 70 °～80 °.
Preferably, each bead core is made to form multiple ring-shaped by winding basic stock continuously, makes
F must be worth at 131.5mm2～227.0mm2In the range of, wherein F is the face, cross section by described basic stock
Long-pending D is multiplied by the windings E of described basic stock and obtains.
Preferably, described organic enhancement layer is embedded with two organic enhancings of described reinforcing cord by stacking
Casing ply and formed, the described reinforcing cord of said two organic enhancing casing ply is relative to tire radially
Incline direction is opposite each other.
Preferably, inside is embedded with the steel enhancement layer of multiply steel cord and is arranged in described organic enhancement layer and each
Between bead core, the tire radial outer end of described organic enhancement layer is positioned at the tire of described steel enhancement layer radially
The position of the tire radial outside of outer end.
Preferably, described organic enhancement layer is further placed in inside the tire width direction of each bead core.
Preferably, the described steel cord being embedded in described steel enhancement layer relative to tire radially with 30 °～
The angle of 50 ° tilts.
This purpose can be realized: it is configured to be installed in 15 ° of deep trouths and takes turns by following heavy-duty pneumatic tire
On rim and include: body piles, it is with around a pair at the width both ends of described body piles
The ring-type extension that bead core turns back；Belt, it is arranged in the tire radial outside of described body piles；Tire
Face, it is arranged in the tire radial outside of described belt；And organic enhancement layer, it is arranged at
Outside the tire width direction of each bead core, and inside is embedded with the reinforcing cord of multiply organic fiber.
Described heavy-duty pneumatic tire be inflated to standard intrinsic pressure in the case of, the centroid of section G of each bead core is positioned at
The position of the tire radial outside of the tire radial outer end of the rim flange of described drop center rim, and in institute
State under the hypothesis that the interior pressure intrinsic pressure 1.5～2.5 times of standards is used by heavy-duty pneumatic tire, be embedded in described
Described reinforcing cord in organic enhancement layer is more than 60 ° relative to the angle of inclination A of tire radial direction.
In the disclosure, the centroid of section G of each bead core is positioned at the tire footpath of rim flange of drop center rim
The position of tire radial outside outward so that even if under the high internal pressure that 1.5～2.5 times of standards are intrinsic pressure also
Can use.Additionally, the reinforcing cord being embedded in organic enhancement layer is relative to the inclination angle of tire radial direction
Degree A is more than 60 °.Therefore, the rubber between each bead core and rim flange is squeezed owing to high internal pressure
In the case of pressing and deforming in the way of bloating towards tire radial outside, this deformation of major part is positioned at
The deformation of the rubber coating between the reinforcing cord of organic enhancement layer absorbs, and this metamorphosis of only a part is
Length direction along reinforcing cord draws reinforcing cord.Thus restrained effectively the disrumpent feelings of reinforcing cord,
The extension of the crackle also being able to effectively to suppress in rubber and each bead part move up (ride up).
Described reinforcing cord in being embedded in described organic enhancement layer is relative to the inclination angle of tire radial direction
In the case of degree A is in the range of 70 °～80 °, it is possible to strongly suppression reinforcing cord is broken under high internal pressure
Disconnected, prevent the disrumpent feelings of during tire building reinforcing cord simultaneously.Additionally, when each bead core is by continuously
Ground winds basic stock and is constituted to form multiple ring-shaped so that F is at 131.5mm for value2～227.0mm2's
In the range of, wherein F is the windings E being multiplied by described basic stock by the area of section D of described basic stock
And obtain time, in the case of the thickness of the rubber in the outside without reducing organic enhancement layer greatly,
High internal pressure can be dealt with.Had by stacking be embedded with described reinforcing cord two at described organic enhancement layer
Machine strengthens casing ply and constitutes, and organic enhancing casing ply is arranged such that described reinforcing cord is relative to wheel
In the case of tire corresponding tilt direction radially is arranged one another in opposite directions, even can more strongly press down
Tension force processed acts on reinforcing cord.Additionally, when inside is embedded with the steel enhancement layer layout of multiply steel cord
Between described organic enhancement layer and each bead core, the tire radial outer end of described organic enhancement layer is positioned at institute
During the position of the tire radial outside stating the tire radial outer end of steel enhancement layer, it is possible to effectively improve each tire
The durability in circle portion, suppresses the radial outer end at steel enhancement layer to generate crackle simultaneously.When described organic enhancing
Layer is when being further placed in inside the tire width direction of each bead core, organic enhancement layer can with steel enhancement layer
Identical mode winds around each bead core.Described steel cord in being embedded in described steel enhancement layer relative to
When tire radially tilts with the angle of 30 °～50 °, it is possible to improve the durability of each bead part.
Accompanying drawing explanation
Fig. 1 is that the airtyred meridian illustrating the first illustrative embodiments of the present utility model cuts
Face,
Fig. 2 is the amplification cross section near airtyred bead part,
Fig. 3 is the cross section from the side of organic enhancement layer, and
Fig. 4 is the figure that the longitudinal axis represents that maximum tension and transverse axis represent angle of inclination A.
Detailed description of the invention
Referring to the drawings illustrative embodiments of the present utility model is illustrated.
Pneumatic tire 11 in Fig. 1, Fig. 2 and Fig. 3 is the heavy duty for being assemblied in truck, bus etc.
Pneumatic belt tire.Pneumatic tire 11 includes that bead part 13, ring-type bead core 12 are embedded in each tyre bead
In portion 13.Therefore, pneumatic tire 11 includes pair of bead core 12.Pneumatic tire 11 also includes from bead part
13 are approximately towards pair of sidewall portions 14 that radial outside extends and by the corresponding radial direction of two sidewall 14
The substantially cylindric fetus face 15 that outer end is linked together.Pneumatic tire 11 includes body piles 16, its with
Ring-type between bead core 12, extend and strengthen sidewall 14 and fetus face 15.Two tires of body piles 16
Turn back around pair of bead core 12 from inner side towards outside in width end.Thus body piles 16 are divided into and being positioned at
Main part 16a between bead core 12 and be positioned at a pair outside the tire width direction of bead core 12 and turn back
Portion 16b.Each bead core 12 is by following composition: will act as the bead cord 17 of basic stock of steel continuously
It is wound into multiple ring-type circle, to form winding layer and to present such as hexagon, tetragon or circle
Cross section etc. (being hexagon in this example).
Body piles 16 are made up of at least one casingply 19, and body piles 16 are by a tire in this example
Body casing ply 19 is constituted.Casingply 19 with the cord angle of 70 °～90 ° (in this example being 90 °) with
Tire equator S-phase is handed over.That is, casingply 19 is by covering multiply not tensible with rubber coating
(inextensible) body cord stretching (stretch) but at approximately radial (meridian direction) is gone up
(in this example for steel cord) and make.In fetus face 15, belt 20 is arranged as and body piles
16 is overlapping and be arranged in the radial outside of body piles 16.Belt 20 is by stacking at least two diametrically
Belt ply layer 21 (in this example being three) is constituted.Each belt ply layer 21 is by with rubber coating
That covering is made up of steel, aromatic polyamide (aromatic polyamide) etc. (for steel in this example),
Inextensible belt cord that multiply is parallel to each other and make.Constitute the belt cord of belt ply layer 21
Relative to 10 °～the 50 ° inclinations at a particular angle of tire equator S, at least two belt ply layer 21 each
From incline direction make the most in opposite direction to intersect.Noting, tyre surface 22 is arranged in body piles 16 He
The radial outside of belt 20, the outer surface of tyre surface 22 be formed around circumferentially extending multiple major troughs 23 and
Transverse pattern groove (not shown in FIG.) upwardly extending with the side that major trough 23 intersects.
A pair steel enhancement layer 27 is from outside overlap body piles 16.Steel enhancement layer 27 extends also along body piles 16
And turn back towards outside from inner side around corresponding bead core 12, with around bead core 12.Steel enhancement layer 27
Lateral part 27a is arranged in outside the tire width direction of bead core 12.The corresponding end of lateral part 27a is positioned at
The position of the tire radial direction inner side of the outboard end of the reflex part 16b of body piles 16.Each steel enhancement layer 27 is by extremely
A few enhancing casing ply 28 is made, and the most each steel enhancement layer 27 is strengthened casing ply 28 by one and makes
Become.Strengthen casing ply 28 to constitute by covering the steel cord that is parallel to each other of multiply with rubber coating, thus
Multiply steel cord is embedded in each steel enhancement layer 27.
A pair organic enhancement layer 29 is arranged as extending along the corresponding lateral part 27a of steel enhancement layer 27, and
And it is overlapping with corresponding lateral part 27a outside tire width direction.The tire footpath of each organic enhancement layer 29
Inboard end is positioned at lower section and the tire radial outer end position of each organic enhancement layer 29 of the bead core 12 of correspondence
Tire radial outside in the end of lateral part 27a.Thus steel enhancement layer 27 is arranged at bead core 12
Tire width direction outside and between bead core 12 and body piles 16 and organic enhancement layer 29.Logical
Cross and steel enhancement layer 27 is arranged in such a way between bead core 12 and organic enhancement layer 29, increased by steel
Strong layer 27 effectively enhances bead part 13, enabling effectively improve the durability of bead part 13.Note
Meaning, replaces extending only along the lateral part 27a of steel enhancement layer 27, and organic enhancement layer 29 can also be along position
Medial part 27b inside bead core 12 extends.In this case, with steel enhancement layer 27 similarly,
Organic enhancement layer 29 is also located at inside the tire width direction of bead core 12 and around bead core 12.
Organic enhancement layer 29 is consisted of two organic enhancing casing plies 30,31 of stacking.Organic enhancing curtain
Reinforcing cord 32 that layer of cloth 30,31 is all parallel to each other by the multiply being coated with organic fiber with rubber coating and
Constitute so that the multiply reinforcing cord 32 of organic fiber is embedded in organic enhancement layer 29.Constitute and strengthen curtain
The organic fiber of line 32 can use (this such as nylon, aromatic polyamide, polyester, acrylic acid, polyurethane
Example uses nylon).Pneumatic tire 11 is assemblied in 15 ° of drop center rims 35 (15 ° of tapering wheel rims).When filling
When the corresponding bead part 13 of air filled tyre 11 is sitting on the bcad seats 36 of wheel rim 35, pneumatic tire 11 and wheel rim 35
Constitute tire/wheel rim assembly.Here 15 ° of drop center rims are with reference to such as automobile tyre AEM of Japan
JATMA yearbook in the bcad seats 36 of regulation tilt the wheel rim of 15 ° relative to the central axis of wheel rim.
Some countries beyond Japan, exist and make all tire/wheel rim assemblies as described above fill
Gas, to after the intrinsic pressure high internal pressure of 1.5～2.5 times of standards, makes to be equipped with all tire/wheel rim groups as described above
The trend that the heavy load truck of part etc. travel.So far high internal pressure is inflated in order to make pneumatic tire 11 to bear,
The bead core 12 used in this illustrative embodiments is that value F is at 131.5mm2～227.0mm2Model
Enclosing interior bead core, wherein D is the area of section of bead cord 17, and E is the winding circle of bead cord 17
Number, F is that D is multiplied by E.When F on duty is in scope described above, center of gravity G in the cross section of bead core 12
(cross sectional shape when along the planar interception bead core 12 of the pivot center comprising pneumatic tire 11
Center of gravity) at the tire radial outer end 37a (summit of curved surface) of the rim flange 37 being positioned at drop center rim 35
The position of tire radial outside.Note, standard is intrinsic pressure be with following standard described in suitable dimensions
The air pressure that the peak load (maximum loadability) of/casing ply grade is corresponding.Described standard is by wheel
Tire manufactures or effective industrial standard regulation in territory of use, such as, at the Tire and Rim Association, Inc. of the U.S.
Yearbook, the European tyre in Europe and the manual of standards of Rim Technical Organisation and the Japanese wheel for motor vehicle of Japan
Corresponding standard described in the JATMA yearbook of tire AEM.
If value F is less than 131.5mm2, pneumatic tire 11 can not deal with high internal pressure and when load-carrying row sometimes
It is possible that fault when sailing.If value F is more than 227.0mm2, then the area of section of bead core 12 becomes big,
It is arranged in the rubber 39 (such as, chafer rubber (chafer rubber)) in the outside of organic enhancement layer 29
Thickness reduce greatly, this there may come a time when can causing trouble.It is therefore preferred that as it has been described above, will
Value F is set in 131.5mm2～227.0mm2In the range of such that it is able to make pneumatic tire 11 deal with in height
Press and reduce the thickness of the rubber 39 in the outside being arranged in organic enhancement layer 29 the biglyyest.If bead core
The centroid of section G of 12 is positioned at the tire of the tire radial outside end 37a of rim flange 37 radially in this way
The position in outside, then be assemblied in 15 ° of drop center rims at pneumatic tire 11 and be inflated in 1.5～2.5 times of standards
Substantially without coming into question during load under the state of the high internal pressure of pressure.But, unfortunately, attribution
In the principle of the following stated it may happen that the disrumpent feelings problem of reinforcing cord 32 in organic enhancement layer 29, lead
Cause the rubber 39 outside the width of reinforcing cord 32 cracks, and cracks can spread is to tyre bead
The outer surface in portion 13.If as it has been described above, bead part 13 outside the width of bead core 12 is produced
The raw crackle advanced towards bead core 12, then owing to the rim flange from rim line to 15 ° drop center rim
The short distance (low depth) of the radial outside end of 37, bead part 13 can move to (ride over) wheel sometimes
On rim flange 37.
In this principle, when the rubber between rim flange 37 and bead core 12 is attributed to above-mentioned height
During intrinsic pressure big pressure extrusion, rubber deforms to be radially oriented in the way of outside bloats.When this happens,
If as described in prior art literature, the reinforcing cord in organic enhancement layer is relative to tire radially
With 40 °～the inclined at inclination angles of 50 °, then reinforcing cord is owing to being pulled by rubber and radially being drawn
Stretch and may be disrumpent feelings.From tests below data it is evident that this illustrative embodiments, bury underground
Reinforcing cord 32 in organic enhancement layer 29 is more than 60 ° relative to the angle of inclination A of tire radial direction.Note
Meaning, the maximum of angle of inclination A is 90 °.Noting, angle of inclination A is to be assemblied in 15 ° at pneumatic tire 11
Drop center rim 35 and the standard that is inflated to intrinsic pressure in the case of the bead part 13 of pneumatic tire 11 and 15 ° of deep trouths
The value measured at the wheel rim burble point R that wheel rim 35 (rim flange 37) separates.
As long as it has been described above, the reinforcing cord 32 being embedded in organic enhancement layer 29 is relative to tire radial direction
Angle of inclination A is more than 60 °, then the rubber between bead core 12 and rim flange 37 is squeezed in interior pressure
Compressive strain and be radially oriented outside bloat in the case of, major part this deformation be positioned at organic enhancement layer 29
The deformation of the rubber coating between reinforcing cord 32 absorbs, and this metamorphosis of only a part is along strengthening curtain
The length direction of line 32 draws reinforcing cord 32.As a result, restrained effectively the disrumpent feelings of reinforcing cord 32, keep away
Exempt from the cracks can spread in rubber and bead core 12 has moved to the situation in rim flange 37.Note, originally show
Example embodiment uses under the pneumatic tire 11 of explanation high internal pressure in being inflated to above-mentioned scope
Assume lower manufacture.But, when when be inflated to intrinsic pressure less than 1.5 times of standards intrinsic pressure use this to fill
During air filled tyre 11, in any case will not have problems.
Preferably, the reinforcing cord 32 being embedded in organic enhancement layer 29 is relative to the inclination angle of tire radial direction
Degree A is in the range of 70 °～80 °.This is due to when molding pneumatic tire 11, cylindric organic increasing
Strong layer 29 is deformed into substantially edge (brim) shape, and when so performing, reinforcing cord 32 is drawn in circumference
Stretching, according to the type of reinforcing cord 32, if angle of inclination is more than 80 °, reinforcing cord 32 can the most sometimes
Can be disrumpent feelings.If angle of inclination A is less than 70 °, the most disrumpent feelings inhibition of reinforcing cord 32 is at height
Interior pressure may be insufficient.But, as long as it has been described above, angle of inclination A is in the range of 70 °～80 °,
It is disrumpent feelings that reinforcing cord 32 just can strongly suppress under high internal pressure, prevents from increasing during tire building simultaneously
Cord 32 is disrumpent feelings by force.
As it has been described above, when organic enhancement layer 29 is consisted of two organic enhancing casing plies 30,31 of stacking
Time, it is preferable that the reinforcing cord 32 in organic enhancing casing ply 30,31 relative to tire radially right
The incline direction answered extends in directions opposite each other so that intersect each other, and this is owing to this can make
The tension force acted on reinforcing cord 32 is more strongly suppressed.In this illustrative embodiments, as above
Described, steel enhancement layer 27 is arranged between bead core 12 and organic enhancement layer 29.But, when steel enhancement layer
27 when being arranged in this position, it is preferred that the outer end of organic enhancement layer 29 is positioned at steel enhancement layer
The position of the tire radial outside of the end of the lateral part 27a of 27.This is because structure proceeded as above
The stress that can make the tire radial outer end of steel enhancement layer 27 is relaxed effectively such that it is able to make this position
The crackle at place is effectively suppressed.It is assemblied in 15 ° of drop center rims 35 at pneumatic tire 11 and inflates
To standard intrinsic pressure in the case of, the steel cord being embedded in steel enhancement layer 27 at burble point R relative to wheel
Tire radially tilts with the angle of 30 °～50 °.
Embodiment 1
As it has been described above, the following is saying about the test that for support, angle of inclination is set as more than 60 °
Bright.
In test, following tire is prepared: the tire of comparative example 1, it includes organic enhancement layer, at this
In organic enhancement layer, the reinforcing cord being embedded in two organic fiber casing plies of correspondence has the phase of 0 °
For tire common angle of inclination A radially, the tire of comparative example 2, it includes having 15 ° this
The organic enhancement layer of common angle of inclination A, the tire of comparative example 3, it includes having 30 ° this common
With the organic enhancement layer of angle of inclination A, the tire of comparative example 4, it include having 40 ° this jointly
The organic enhancement layer of angle of inclination A, and the tire of comparative example 5, it includes having 55 ° this common
Organic enhancement layer with angle of inclination A；The tire of embodiment 1, it include having 60 ° this jointly
The organic enhancement layer of angle of inclination A, the tire of embodiment 2, it includes having 70 ° this and jointly inclines
The organic enhancement layer of rake angle A, the tire of embodiment 3, it this common inclination including there are 75 °
The organic enhancement layer of angle A, the tire of embodiment 4, it this common inclination angle including there are 82 °
The organic enhancement layer of degree A, and the tire of embodiment 5, it this common inclination including there are 90 °
The organic enhancement layer of angle A.
The tire of each comparative example and the tire of embodiment are respectively provided with such as the 13R of regulation in JATMA yearbook
The tire size of 22.5 16PR, and it is assemblied in the wheel rim that size is 9.75 × 22.5.The wheel of each comparative example
Tire has identical structure to that indicated in the drawings with the tire of embodiment: body cord is relative to tire equator S
It is the angle of inclination of 90 °, presses from inner side casing ply towards the order of outermost casing ply, belt cord
Relative to tire equator S be 22 ° towards upper right, 22 ° towards upper left, 30 ° of inclinations angle towards upper right
Degree, and the steel cord of steel enhancement layer relative to tire radially with 40 ° of inclinations.Act on be embedded in organic
The maximum tension on reinforcing cord in enhancement layer is assemblied in above wheel rim by the tire of each correspondence and fills
Gas draws to the simulation under the state of the intrinsic pressure high internal pressure of 2.5 times of standards.
Result is drawn out in the figure of Fig. 4.In the diagram, transverse axis represents angle of inclination A, and the longitudinal axis represents to be made
Maximum tension with the index that the maximum tension that angle of inclination A is 40 ° is set as 100.From figure substantially
, maximum tension is gradually reduced in the interval of the value of the angle of inclination A of 0 °～55 °.But, maximum
Tension force strongly reduces in the interval of the value of the angle of inclination A of 60 °～90 °.From this figure, it is to be understood that
Even if being in the case of tyre inflating to high internal pressure, as long as the value of angle of inclination A is not less than 60 °, with regard to energy
Enough effectively reinforcing cords that suppression is embedded in organic enhancement layer are disrumpent feelings.Note, due at angle of inclination
Equal to 58 °, (this is that the hypothesis line connecting the point that maximum tension is gradually reduced drastically subtracts with connecting maximum tension to A
The intersection point assumed between line of little point) time there is unclear effect, therefore in this utility model,
It is 60 ° that angle of inclination A can show the lower limit set of significant beneficial effect in practice.Note, right
Different types of heavy duty tire performs identical simulation, and result shows as identical trend.
Industrial applicability
This utility model can apply to the industry of the heavy-duty pneumatic tire for being assemblied in 15 ° of drop center rims
Field.
Claims (7)
1. a heavy-duty pneumatic tire, it is configured to be installed on 15 ° of drop center rims, and described heavy duty is filled
Air filled tyre includes:
Body piles, it is to turn back around the pair of bead core at the width both ends of described body piles
Ring-type extension；
Belt, it is arranged in the tire radial outside of described body piles；
Tyre surface, it is arranged in the tire radial outside of described belt；And
Organic enhancement layer, it is arranged at outside the tire width direction of each bead core, and inside is buried
It is provided with the reinforcing cord of multiply organic fiber, it is characterised in that:
Described heavy-duty pneumatic tire be inflated to standard intrinsic pressure in the case of, the centroid of section G of each bead core
It is configured to be positioned at the position of the radial outside of the tire radial outer end of the rim flange of described drop center rim,
And
Under the hypothesis that the interior pressure intrinsic pressure 1.5～2.5 times of standards is used by described heavy-duty pneumatic tire, bury
The described reinforcing cord being located in described organic enhancement layer is 60 ° relative to the angle of inclination A of tire radial direction
Above.
Heavy-duty pneumatic tire the most according to claim 1, it is characterised in that be embedded in described organic
Described reinforcing cord in enhancement layer relative to tire angle of inclination A radially 70 °～the scope of 80 °
In.
Heavy-duty pneumatic tire the most according to claim 1 and 2, it is characterised in that each bead core passes through
Wind basic stock continuously to make to form multiple ring-shaped so that F is at 131.5mm for value2~
227.0mm2In the range of, wherein F is to be multiplied by described basic stock by the area of section D of described basic stock
Windings E and obtain.
Heavy-duty pneumatic tire the most according to claim 1 and 2, it is characterised in that described organic enhancing
Layer is embedded with two organic enhancing casing plies of described reinforcing cord by stacking and is formed, and said two has
The described reinforcing cord that machine strengthens casing ply is opposite each other relative to the incline direction of tire radial direction.
Heavy-duty pneumatic tire the most according to claim 1 and 2, it is characterised in that inside is embedded with many
The steel enhancement layer of stock steel cord is arranged between described organic enhancement layer and each bead core, described organic enhancing
The tire radial outer end of layer is positioned at the position of the tire radial outside of the tire radial outer end of described steel enhancement layer
Put.
Heavy-duty pneumatic tire the most according to claim 1 and 2, it is characterised in that described organic enhancing
Layer is further placed in inside the tire width direction of each bead core.
Heavy-duty pneumatic tire the most according to claim 5, it is characterised in that be embedded in described steel and increase
Described steel cord in strong layer radially tilts with the angle of 30 °～50 ° relative to tire.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015090423A JP6495087B2 (en) | 2015-04-27 | 2015-04-27 | Tire / rim assembly |
| JP2015-090423 | 2015-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205601517U true CN205601517U (en) | 2016-09-28 |
Family
ID=56971355
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620362992.7U Expired - Fee Related CN205601517U (en) | 2015-04-27 | 2016-04-26 | Heavy -load pneumatic tire |
| CN201610267020.4A Active CN106080047B (en) | 2015-04-27 | 2016-04-26 | Heavy duty pneumatic tire |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610267020.4A Active CN106080047B (en) | 2015-04-27 | 2016-04-26 | Heavy duty pneumatic tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6495087B2 (en) |
| CN (2) | CN205601517U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106080047A (en) * | 2015-04-27 | 2016-11-09 | 株式会社普利司通 | Heavy-duty pneumatic tire |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6554957B2 (en) * | 2015-07-14 | 2019-08-07 | 住友ゴム工業株式会社 | Heavy duty pneumatic tire |
| JP6790846B2 (en) * | 2017-01-13 | 2020-11-25 | 住友ゴム工業株式会社 | Pneumatic tires for heavy loads |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3643191B2 (en) * | 1995-11-29 | 2005-04-27 | 株式会社ブリヂストン | 15 ° tapered radial tire for trucks and buses |
| JP2610179B2 (en) * | 1988-11-18 | 1997-05-14 | 横浜ゴム株式会社 | Pneumatic radial tire |
| JPH04189607A (en) * | 1990-11-22 | 1992-07-08 | Bridgestone Corp | Pneumatic radial tire for heavy load |
| FR2707561A1 (en) * | 1993-07-12 | 1995-01-20 | Michelin & Cie | Tire structure for heavy goods vehicles. |
| JP2966756B2 (en) * | 1995-03-30 | 1999-10-25 | 住友ゴム工業株式会社 | Heavy duty tire for 15mm taper rim |
| JP3158058B2 (en) * | 1996-05-28 | 2001-04-23 | 住友ゴム工業株式会社 | Radial tires for heavy loads |
| WO2003006267A1 (en) * | 2001-07-10 | 2003-01-23 | Bridgestone Corporation | Pneumatic tire |
| JP4830028B2 (en) * | 2009-03-06 | 2011-12-07 | 住友ゴム工業株式会社 | Heavy duty radial tire |
| JP6495087B2 (en) * | 2015-04-27 | 2019-04-03 | 株式会社ブリヂストン | Tire / rim assembly |
-
2015
- 2015-04-27 JP JP2015090423A patent/JP6495087B2/en active Active
-
2016
- 2016-04-26 CN CN201620362992.7U patent/CN205601517U/en not_active Expired - Fee Related
- 2016-04-26 CN CN201610267020.4A patent/CN106080047B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106080047A (en) * | 2015-04-27 | 2016-11-09 | 株式会社普利司通 | Heavy-duty pneumatic tire |
| CN106080047B (en) * | 2015-04-27 | 2020-04-07 | 株式会社普利司通 | Heavy duty pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6495087B2 (en) | 2019-04-03 |
| JP2016203896A (en) | 2016-12-08 |
| CN106080047B (en) | 2020-04-07 |
| CN106080047A (en) | 2016-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 Termination date: 20210426 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |