CN106274300A - Tyre for heavy load - Google Patents
Tyre for heavy load Download PDFInfo
- Publication number
- CN106274300A CN106274300A CN201610413056.9A CN201610413056A CN106274300A CN 106274300 A CN106274300 A CN 106274300A CN 201610413056 A CN201610413056 A CN 201610413056A CN 106274300 A CN106274300 A CN 106274300A
- Authority
- CN
- China
- Prior art keywords
- tire
- outer end
- steel
- organic fiber
- radius direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The present invention provides a kind of tyre for heavy load that can improve bead part durability.This tyre for heavy load has the carcass (6) being made up of carcass ply (6A), and described carcass ply (6A) includes main part (6a) and return portion (6b).Bead part (4) is provided with the first rib (11) being positioned at main part (6a) side and the second rib (12) being positioned at return portion (6b) side.First rib (11) includes the second steel-cord ply (22) that the first steel-cord ply (21) and cross section are generally u-shaped.Second rib (12) including: from the tire axial outer side covers the second steel-cord ply (22) the first organic fiber cord layer (31) in the outer end of return portion (6b) side and the second organic fiber cord layer (32).
Description
Technical field
The present invention relates to a kind of tyre for heavy load that can improve bead part durability.
Background technology
Such as, in following patent documentation 1, a kind of tyre for heavy load being provided with rib in bead part is proposed.Specially
The rib of profit document 1 includes: the first steel-cord ply that the main part lateral tire radial direction at carcass ply extends；With
And roll from tire axle Inside To Outside around bead core and the second steel-cord ply that cross section is generally u-shaped.
But, for the tire of patent documentation 1, when bead part flexural deformation outside tire axial, stress can be concentrated
In the end of the second steel-cord ply, and then there is the tendency making described end produce tire delamination equivalent damage.Therefore, existing
The raising about bead part durability in technology there are further room for improvement.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-106531 publication
Summary of the invention
The problem to be solved in the present invention
The present invention proposes in view of practical situation as described above, and its main purpose is with the main body at carcass ply
Side, portion arranges the first rib, and based on return portion side arranges the second rib, it is provided that it is resistance to that one can improve bead part
The tyre for heavy load of property for a long time.
For solving the means of problem
The tyre for heavy load of the present invention has the carcass being made up of carcass ply, and described carcass ply includes: from tyre surface
Portion via sidewall until the main part of the bead core of bead part；And be connected and around described bead core with described main part
The return portion turned back from tire axial Inside To Outside, is provided with at least some of at described main part in described bead part
The first rib that in tire axial, lateral tire radius direction extends；And at least partially at the tire axle of described return portion
The second rib that tire radius direction extends laterally outwardly, described first rib includes: along the tire axle of described main part
The first steel-cord ply that the most lateral tire radial direction extends；And at least some of with the first all-steel cord ply and
Roll from tire axial Inside To Outside around described bead core, have to terminate at and lean on tire radius side than the outer end of described return portion
To the outer end of inner side, the second steel-cord ply that cross section is generally u-shaped, described second rib includes: outside tire axial
Cover described second steel-cord ply the first organic fiber cord layer in the described outer end of described return portion side and second organic
Fiber cord layer.
The tyre for heavy load of the present invention is preferably, in described bead part, between described main part and described return portion
Being provided with from described bead core to the bead apex extended outside tire radius direction, described bead apex includes: interior three
Angle glue；And be configured at outside the tire radius direction of described Triangle ID glue and rubber hardness less than described Triangle ID glue outer three
Angle glue, inside the tire axial of the described main part of described carcass ply, described first steel-cord ply is in tire radius side
Outer end upwards, and the outer end that described second steel-cord ply is on tire radius direction, be respectively positioned on and exist than described Triangle ID glue
Inside outer end roller tire radial direction on tire radius direction.
The tyre for heavy load of the present invention is preferably, inside the tire axial of described main part, and described first steel wire curtain
Line layer outer end on tire radius direction is positioned at outside than the outer end roller tire radial direction of described return portion, described second steel
Silk cord layer leans on than the outer end of described return portion in the outer end of described return portion side and being respectively positioned in the outer end of described main part side
Inside tire radius direction.
The tyre for heavy load of the present invention is preferably, outside the tire axial of described return portion, and described first organic fibre
Dimension cord ply outer end on tire radius direction, and outside described second organic fiber cord layer is on tire radius direction
End, is respectively positioned on outside than the outer end roller tire radial direction of described return portion, and described first organic fiber cord layer covers described
The described outer end of the second organic fiber cord layer.
The tyre for heavy load of the present invention is preferably, and described second rib the inner on tire radius direction is positioned at ratio
Described bead core roller tire is axially external, is being installed on regular wheel rim and is loading under regular intrinsic pressure normal state, from tyre bead base
Line to the tire radius direction distance of described the inner of described second rib is, from described tyre bead baseline to described regular wheel rim
Less than 0.6 times of flange height of flange outer end on tire radius direction.
The tyre for heavy load of the present invention is preferably, and described second rib has makes described first organic fiber cord layer
Cord and described second organic fiber cord layer cord be spaced apart 0.5～1.8mm layer adjacency section.
The tyre for heavy load of the present invention is preferably, described first steel-cord ply inner position on tire radius direction
Inside the tire axial of described main part, described first organic fiber cord layer the inner on tire radius direction is positioned at institute
State outside the tire axial of return portion and than the described inner roller tire radial direction of described first steel-cord ply outside, described
Second organic fiber cord layer the inner on tire radius direction is positioned at outside the tire axial of described return portion and ratio is described
Inside the described inner roller tire radial direction of the first steel-cord ply.
The tyre for heavy load of the present invention is preferably, and described bead core has at lateral, tire radius direction tire axial
Above Yan Shening, described the inner of described first steel-cord ply and described the inner of described second organic fiber cord layer are positioned at
Inside the described roller tire radial direction above of described bead core, described the inner of described first organic fiber cord layer is positioned at
Outside the described roller tire radial direction above of described bead core.
Invention effect
Bead part at the tyre for heavy load of the present invention is provided with at least partially at the tire axial of described main part
The first rib that interior lateral tire radius direction extends；And it is at least some of in the tire axial lateral of described return portion
The second rib that tire radius direction extends.
First rib includes: the first steel wire that lateral tire radius direction extends along the tire axial of described main part
Cord ply；And at least some of roll up from tire axial Inside To Outside with the first all-steel cord ply and around described bead core
Rise, there is the outer end terminated at inside than the outer end roller tire radial direction of described return portion, the second steel that cross section is generally u-shaped
Silk cord layer.For this first rib, make the first steel-cord ply and the second steel-cord ply in one, tyre bead can be improved
The flexural rigidity in portion, and then can effectively suppress the most curved outside tire axial with bead core as fulcrum of bead part
Bent deformation.
Second rib includes: from the institute in described return portion side of the second steel-cord ply described in tire axial outer side covers
State the first organic fiber cord layer and second organic fiber cord layer of outer end.For organic fiber cord layer, its flexibility is high
In steel-cord ply, and with the excellent adhesion of rubber components.Therefore, for being made up of the organic fiber cord layer of two-layer
Second rib, can relax the stress at the second steel-cord ply outer end, and can suppress tire delamination herein for a long time.
Accompanying drawing explanation
Fig. 1 is the sectional view of the tyre for heavy load of one embodiment of the present invention.
Fig. 2 is the amplification view of the bead part of Fig. 1.
Fig. 3 is the enlarged drawing of the layer adjacency section of second rib of Fig. 2.
Fig. 4 is the amplification view of the bead part of another embodiment of the present invention.
Fig. 5 is the amplification view of the bead part of another embodiment of the present invention.
Fig. 6 is the amplification view of the bead part of the tyre for heavy load of comparative example.
Detailed description of the invention
Hereinafter, based on accompanying drawing, an embodiment of the invention is illustrated.
The heavy duty pneumatic vehicle tire that figure 1 illustrates present embodiment is (following, also referred to as " tire ".) 1 regular
The tyre equatorial sectional view of rotary shaft is included under state.The tire 1 of present embodiment is to be provided with the inner tube of a tyre in tyre cavity
The inner tube of a tyre tire of (omitting diagram), but it is not limited to this embodiment.
" normal state " refers to, tire is installed on regular wheel rim R and fills regular intrinsic pressure non-loaded state.With
Under, unless specifically stated otherwise, otherwise the size etc. of each several part of tire is under this normal state the value measured.
" regular wheel rim " refers to, in comprising the schematism of specification of tire institute foundation, for each tire by
The wheel rim that this specification specifies, such as, if JATMA is then " standard rim ", if TRA is then " Design Rim ", if
ETRTO is then " Measuring Rim ".
" regular intrinsic pressure " refers to, in comprising the schematism of specification of tire institute foundation, for each tire by
The air pressure that each specification specifies, if JATMA is then " hyperbar ", if TRA is then " TIRE LOAD LIMITS AT
VARIOUS COLD INFLATION PRESSURES " in described maximum, if ETRTO is then " INFLATION
PRESSURE”。
As it is shown in figure 1, the tire 1 of present embodiment has from fetus face 2 via sidewall 3 until the tyre bead of bead part 4
The ring-type carcass 6 of core 5.Carcass 6 is such as formed by the carcass ply 6A of at least 1 layer.Carcass ply 6A is e.g. by steel wire
Body cord forms with the angle arrangement relative to tire circumference 70～90 °.
Carcass ply 6A includes main part 6a and return portion 6b.Main part 6a from fetus face 2 via sidewall 3 until tyre bead
The bead core 5 in portion 4.Return portion 6b is connected with main part 6a and turns back from tire axial Inside To Outside around bead core 5.
Preferably, outside the radial direction of carcass 6 and at the inside of fetus face 2, it is configured with belt
7.Belt 7 is such as formed by the multiple belt ply layers employing steel wire belt cord.The belt 7 of present embodiment
For, the four-layer structure such as formed by belt ply layer 7A～7D of first～the 4th.
Figure 2 illustrates the enlarged drawing of bead part 4.It is configured with from bead core 5 to outside tire radius direction in bead part 4
The bead apex 8 extended；And the first rib 11 and the second rib 12 for reinforced bead portion 4.
The bead multilayer-wound multiple row of steel wire is such as formed by bead core 5, and cross section is polygon-shaped.For this
The bead core 5 of embodiment, such as cross section form flattened hexagon, and have at lateral, tire radius direction tire axial
Extend above 5a, and in tire radius direction lateral tire axial extension below 5b.Preferably, this reality
The bead core 5 executing mode includes: the core main body 9 being such as made up of bead, and the wrapper 10 covered around core main body 9.Bag
Dress layer 10 is made up of the canvas of the organic fibers such as such as nylon, is used for fixing bead.
For bead apex 8, such as, extend in tapered outside tire radius direction from bead core 5.This embodiment party
The bead apex 8 of formula includes: such as Triangle ID glue 13, and is configured at outer three outside the tire radius direction of Triangle ID glue 13
Angle glue 14.
Triangle ID glue 13 is formed as, such as between main part 6a and return portion 6b, from bead core 5 to tire radius side
Extend laterally and cross section is general triangular.Triangle ID glue 13 is positioned at such as main part 6a in the outer end 15 in tire radius direction
Tire axial lateral surface on.The described outer end 15 of Triangle ID glue 13 is preferably and is such as positioned at outer end 16 roller than return portion 6b
Outside tire radial direction.
Triangle ID glue 13 is preferably and is made up of the vulcanie of such as rubber hardness 80～95 °." rubber in this specification
Hardness " refer to, foundation JIS-K6253 also utilizes A type hardness tester meter, the Durometer A hardness measured in the environment of 23 DEG C.
Outer triangle rubber 14 is such as formed with the rubber hardness less than Triangle ID glue 13.Outer triangle rubber 14 is such as from Triangle ID
The outer end 15 of glue 13 to return portion 6b along extending inside radial direction and being connected with Triangle ID glue 13 across separating surface 17.
First rib 11 includes the first steel-cord ply 21 and the second steel-cord ply 22.Each steel-cord ply 21,22
E.g. a plurality of all-steel cord is formed with the angle oblique arrangement relative to tire circumference 20～60 °.First steel-cord ply
Each all-steel cord of 21 and each all-steel cord of the second steel-cord ply 22 form with rightabout oblique arrangement such as mutually.Respectively
The arrangement bar number of the all-steel cord in layer 21,22 is preferably, and such as every 50mm slice width is 20～40.
First steel-cord ply 21 lateral tire radius direction along the tire axial of main part 6a extends.For this enforcement
First steel-cord ply 21 of mode, for example, at least a part contact with main part 6a.But, joining of the first steel-cord ply 21
Put and be not limited to this embodiment.
First steel-cord ply 21 is such as positioned at outer end 16 roller than return portion 6b in the outer end 23 in tire radius direction
Outside tire radial direction.Thus, the flexural rigidity inside the tire axial of bead part 4 can be effectively improved.First all-steel cord
The outer end 23 of layer is such as positioned at inside than the outer end 15 roller tire radial direction of Triangle ID glue 13.Thus, can suppress at the first steel
Deformation is concentrated in the vicinity, outer end 23 of silk cord layer 21.Accordingly, it is capable to the tire delamination that suppression is with described outer end 23 as starting point.
In order to improve the rigidity of bead part 4, and suppress the tire delamination with described outer end 23 as starting point, from tyre bead baseline
The outer end 23 of BL to first steel-cord ply 21, the height H2 on tire radius direction is preferably, such as from tyre bead baseline
BL to the outer end 15 of Triangle ID glue 13 0.85～0.95 times of the height H1 of the Triangle ID glue on tire radius direction.Need
Being noted that in this manual, tyre bead baseline BL refers to the wheel rim path position by being determined by the specification of tire institute foundation
Tire axial line.
First steel-cord ply 21 is such as positioned at inside the tire axial of main part 6a in the inner 24 in tire radius direction.
As preferred embodiment, the inner 24 of the first steel-cord ply 21 is such as positioned at the above 5a roller tire half than bead core 5
Inside direction, footpath, and than 5b roller tire radial direction below bead core 5 outside.In the case of to tire used load,
It is substantially absent from deformation near bead core 5.Therefore, according to present embodiment, can suppress with the first steel-cord ply 21
Inner 24 is the tire delamination of starting point.
For the second steel-cord ply 22, roll from tire axial Inside To Outside around bead core 5 and cross section is in substantially U
Shape.In main part 6a side, second steel-cord ply 22 outer end 25 on tire radius direction is positioned at the first steel-cord ply 21
The inner 24 tire radius direction outside.Accordingly, for the second steel-cord ply 22, at least some of and the first all-steel cord
Layer 21 is overlapping.
As preferred embodiment, the outer end 25 of the second steel-cord ply 22 is such as positioned at the outer end than Triangle ID glue 13
15 and first steel-cord ply 21 outer end 23 roller tire radial direction inside.As further preferred embodiment, second
The outer end 25 of steel-cord ply 22 is positioned at inside the outer end 16 roller tire radial direction than return portion 6b.Thus, this embodiment party
In formula, return portion 6b outer end 16 on tire radius direction is positioned at outer end 23 and second steel wire curtain of the first steel-cord ply 21
Between the outer end 25 of line layer 22.Thus, the outer end position of layer is dispersed on tire radius direction, makes the rigidity of bead part 4 divide
Cloth is uniform, and suppresses the stress at bead part 4 to concentrate.
In order to play the effect above further, from tyre bead baseline BL to second steel-cord ply 22 main part 6a side
The end 25 height H3 on tire radius direction are preferably more than 0.55 times of described Triangle ID glue height H1, and more preferably 0.60
More than Bei, and preferably less than 0.70 times, more preferably less than 0.65 times.
Second steel-cord ply 22 is positioned at the outer end 16 than return portion 6b by tire radius in the outer end 26 of return portion 6b side
Inside direction.This second steel-cord ply 22 will not make the bead part 4 rigidity outside tire axial excessively improve, and is conducive to
Improve riding comfort.
As described previously for including the first steel-cord ply 21 and the first rib 11 of the second steel-cord ply 22, make
Each layer 21,22, in one, can improve the flexural rigidity of bead part 4, and then can effectively suppress the bead part 4 with bead core 5 to be
Fulcrum is significantly flexural deformation outside tire axial.
Second rib 12 includes the first organic fiber cord layer 31 and the second organic fiber cord layer 32.Each organic fiber
A plurality of organic fiber cord is e.g. formed by cord ply 31,32 with the angle oblique arrangement relative to tire circumference 20～60 °.
Each cord of the first organic fiber cord layer 31 and each cord of the second organic fiber cord layer 32 are such as with mutual rightabout
Oblique arrangement forms.
The arrangement bar number of the organic fiber cord in each layer 31,32 is preferably, and such as every 50mm slice width is 20～40.Make
For organic fiber cord, such as nylon cord, polyester cord, aromatic polyamide cord or high tenacity vinylon are preferably used
Cord etc..For this organic fiber cord layer, its flexibility is higher than steel-cord ply, and excellent with the adaptation of rubber components
Different.
First organic fiber cord layer 31 and the second organic fiber cord layer 32 are overlapped, from tire axial outer side covers
Second steel-cord ply 22 is in the outer end 26 of return portion 6b side.The second rib 12 being made up of the organic fiber cord layer of two-layer
Have be better than steel-cord ply flexibility and with the adaptation of rubber components, therefore can relax the second steel-cord ply 22 outer end
Stress at 24, and tire delamination herein can be suppressed for a long time.
First organic fiber cord layer 31 is positioned at outer end 16 roller than return portion 6b in the outer end 33 in tire radius direction
Outside tire radial direction.As preferred embodiment, the outer end 33 of the first organic fiber cord layer 31 is positioned at ratio Triangle ID glue
Outside the outer end 15 roller tire radial direction of 13.Specifically, from tyre bead baseline BL to first organic fiber cord layer 31
Till end 33, the height H4 on tire radius direction is, 1.05～1.15 times of the most described Triangle ID glue height H1.
As further preferred embodiment, the outer end 33 of the first organic fiber cord layer 31 is positioned at than outer triangle rubber 14
Outer end 18 roller tire radial direction inside.Thus, vicinity, outer end 33 collection at the first organic fiber cord layer 31 can be suppressed
Middle deformation, and the tire delamination with described outer end 33 as starting point can be suppressed.
First organic fiber cord layer 31 the inner 34 on tire radius direction is positioned at outside the tire axial of return portion 6b
Outside the inner 24 roller tire radial direction of side and ratio the first steel-cord ply 21.As preferred embodiment, first is organic
The inner 34 of fiber cord layer 31 is positioned at outside than the above 5a roller tire radial direction of bead core 5.When tire running, first
Utilize rim flange to suppress deformation near the inner 34 of organic fiber cord layer 31, and make deformation reduce.Therefore, as above institute
State, even if shortening the first organic fiber cord layer 31 the most there is not the worry of tire delamination, it is possible to reduce tire weight.
The outer end 16 that second organic fiber cord layer 32 outer end 35 on tire radius direction is positioned at than return portion 6b is leaned on
Outside tire radius direction.Thus, the outer end 16 of return portion 6b is covered by the second organic fiber cord layer 32.Therefore, may be used
Effectively to suppress the tire delamination with the outer end 16 of return portion 6b as starting point.
As preferred embodiment, the outer end 35 of the second organic fiber cord layer 32 is such as positioned at than the first organic fiber
Inside the cord ply 31 outer end 33 roller tire radial direction on tire radius direction, and by the first organic fiber cord layer 31
Cover.Thus, it is possible to effectively suppress the tire delamination with the outer end 35 of the second organic fiber cord layer 32 as starting point.
As further preferred embodiment, from the outer end 35 of tyre bead baseline BL to second organic fiber cord layer 32 it is
Only 0.95～1.05 times that height H5 is described Triangle ID glue height H1 on tire radius direction.This second organic fiber
Cord ply 32 and the synergism of Triangle ID glue 13, can suppress the bead part 4 flexural deformation outside tire axial effectively.
Second organic fiber cord layer 32 the inner 36 on tire radius direction is positioned at outside the tire axial of return portion 6b
Inside the tire radius direction of the inner 34 of side and the first organic fiber cord layer 31.
As preferred embodiment, the inner 36 of the second organic fiber cord layer 32 is such as configured at than bead core 5
Above inside 5a roller tire radial direction, and than 5b roller tire radial direction below bead core 5 outside.Even if to tire
In the case of used load, the vicinity of bead core 5 is also substantially absent from deformation, therefore can suppress with the second organic fiber cord
The tire delamination that the inner 36 is starting point of layer 32.
As further preferred embodiment, the inner 36 of the second organic fiber cord layer 32 is such as preferably located at ratio
Inside the inner 24 roller tire radial direction of the first steel-cord ply 21.Thus, make easily to form the uneven each layer of rigidity inner
Position dispersion, and then the damage of the bead part such as tire delamination can be suppressed.
Under normal state, preferably on tire radius direction from tyre bead baseline BL to second rib 12 at tire radius
Distance L1 of the inner 37 (being the inner 36 of the second organic fiber cord layer 32 in the present embodiment) on direction is, from tyre bead
Less than 0.6 times of baseline BL flange height Hf to outer end on tire radius direction of the flange of regular wheel rim.Thus,
The shear stress acting on second rib 12 the inner 37 can be reduced, and then the tire with described inner 37 as starting point can be suppressed to take off
Layer.
In order to play the effect above further, in the present embodiment, preferably from tyre bead baseline on tire radius direction
Distance L2 of the inner 34 of BL to first organic fiber cord layer 31 is less than 0.6 times of described flange height Hf, more preferably
Less than 0.5 times.
Second rib 12 has the layer adjacency section 38 adjacent to each other with organic fiber cord layer 31,32.As it is shown on figure 3,
For layer adjacency section 38, the cord 31c of the first organic fiber cord layer 31 and the cord 32c of the second organic fiber cord layer 32
Interval t1 is such as preferably 0.5～1.8mm.This layer adjacency section 38 can effectively absorb each organic fiber cord layer 31,32
Between produce shearing deformation.
The enlarged drawing of the bead part of the tyre for heavy load of another embodiment of the present invention is shown in figures 4 and 5.To figure
Structure common with above-mentioned embodiment in 4 and Fig. 5 marks same reference.
In the embodiment shown in Fig. 4, the inner 37 of the second rib 12 is configured at the tire radius direction of bead core 5
Inner side.For this embodiment, between bead core 5 and rim flange, fix the inner 37 of the second rib 12, can be effective
Ground suppression is with described inner 37 for starting point generation tire delamination.
In the embodiment shown in Fig. 5, the inner 37 of the second rib 12 is positioned at inside the tire axial of bead core 5.
For this second rib 12, bead part 4 can be strengthened further, be conducive to suppressing its flexural deformation.
In the embodiment shown in Fig. 4 and Fig. 5, the inner 37 of the second organic fiber cord layer 32 constitutes the second rib
The inner 37.It is however not limited to this embodiment, the inner 34 of the first organic fiber cord layer 31 can also constitute second and add
The inner 37 in strong portion.For this embodiment, owing to the first organic fiber cord layer 31 covers the second organic fiber cord layer
The inner 36 of 32, therefore can improve the durability of bead part 4 further.
Although being described in detail the tyre for heavy load of one embodiment of the present invention above, but the present invention is also
It is not limited to above-mentioned specific embodiment, it is possible to be changed to various mode and be carried out.
[embodiment]
Specification based on table 1, manufactures the basic structure with Fig. 1, has the size of the bead part of Fig. 2, Fig. 4 or Fig. 5
12.00R20 tyre for heavy load.As comparative example, manufacture as shown in Figure 6 there is the bead part only arranging the first rib
Tyre for heavy load.The durability of the bead part of each test tire is tested.Each the test common specification of tire, test
Method is as follows.
Wheel rim: 20 × 8.50V is installed
Inner pressure of tire: 850kPa
<durability of bead part>
Tumbler test machine makes above-mentioned test tire press condition of stating to travel, measure bead part and produce the row before damage
Sail distance.As a result of which it is, set the value of comparative example 1 as 100, numerical value is the biggest, then it represents that the durability of bead part is the most excellent.
Speed: 20km/h
Longitudinal loading: 73.46KN
Table 1 shows test result.
[table 1]
Can confirm that according to test result the durability of the bead part of embodiment tire improves.
Description of reference numerals
2 fetus faces
3 sidewall
4 bead part
5 bead cores
6a main part
6b return portion
6A carcass ply
6 carcasses
11 first ribs
12 second ribs
21 first steel-cord plys
22 second steel-cord plys
31 first organic fiber cord layers
32 second organic fiber cord layers
Claims (8)
1. a tyre for heavy load, it is characterised in that:
There is the carcass being made up of carcass ply,
Described carcass ply includes: from fetus face via sidewall until the main part of the bead core of bead part；And with described
The return portion that main part is connected and turns back from tire axial Inside To Outside around described bead core,
It is provided with at least some of lateral tire radius direction extension in the tire axial of described main part in described bead part
The first rib；And second extended in the tire radius direction, tire axial lateral of described return portion at least partially
Rib,
Described first rib includes: the first steel wire that lateral tire radius direction extends along the tire axial of described main part
Cord ply；And at least some of roll up from tire axial Inside To Outside with the first all-steel cord ply and around described bead core
Rise, there is the outer end terminated at inside than the outer end roller tire radial direction of described return portion, the second steel that cross section is generally u-shaped
Silk cord layer,
Described second rib includes: from the institute in described return portion side of the second steel-cord ply described in tire axial outer side covers
State the first organic fiber cord layer and second organic fiber cord layer of outer end.
Tyre for heavy load the most according to claim 1, it is characterised in that
In described bead part, it is provided with from described bead core to tire radius direction between described main part and described return portion
The bead apex that outside extends,
Described bead apex includes: Triangle ID glue；And it is configured at outside the tire radius direction of described Triangle ID glue and rubber
Glue hardness is less than the outer triangle rubber of described Triangle ID glue,
Inside the tire axial of the described main part of described carcass ply, described first steel-cord ply is in tire radius direction
On outer end, and the outer end that described second steel-cord ply is on tire radius direction, be respectively positioned on than described Triangle ID glue at wheel
Inside outer end roller tire radial direction on tire radial direction.
Tyre for heavy load the most according to claim 1 and 2, it is characterised in that
Inside the tire axial of described main part, described first steel-cord ply outer end on tire radius direction is positioned at ratio
Outside the outer end roller tire radial direction of described return portion,
Described second steel-cord ply is in the outer end of described return portion side and to be respectively positioned on ratio in the outer end of described main part side described
Inside the outer end roller tire radial direction of return portion.
4. according to the tyre for heavy load according to any one of claims 1 to 3, it is characterised in that
Outside the tire axial of described return portion, described first organic fiber cord layer outer end on tire radius direction,
With described second organic fiber cord layer outer end on tire radius direction, it is respectively positioned on the outer end roller tire than described return portion
Outside radial direction,
Described first organic fiber cord layer covers the described outer end of described second organic fiber cord layer.
5. according to the tyre for heavy load according to any one of Claims 1 to 4, it is characterised in that
Described second rib the inner on tire radius direction is positioned at more axially external than described bead core roller tire,
It is being installed on regular wheel rim and is loading under regular intrinsic pressure normal state, from tyre bead baseline to the institute of described second rib
The tire radius direction distance stating the inner is, from described tyre bead baseline to the flange of described regular wheel rim on tire radius direction
Less than 0.6 times of flange height of outer end.
6. according to the tyre for heavy load according to any one of Claims 1 to 5, it is characterised in that
Described second rib has the cord making described first organic fiber cord layer and described second organic fiber cord layer
Cord be spaced apart 0.5～1.8mm layer adjacency section.
7. according to the tyre for heavy load according to any one of claim 1～6, it is characterised in that
Described first steel-cord ply the inner on tire radius direction is positioned at inside the tire axial of described main part,
Described first organic fiber cord layer the inner on tire radius direction is positioned at outside the tire axial of described return portion
And outside than the described inner roller tire radial direction of described first steel-cord ply,
Described second organic fiber cord layer the inner on tire radius direction is positioned at outside the tire axial of described return portion
And inside than the described inner roller tire radial direction of described first steel-cord ply.
Tyre for heavy load the most according to claim 7, it is characterised in that
Described bead core has on lateral, tire radius direction tire axial extends,
It is described that described the inner of described first steel-cord ply and described the inner of described second organic fiber cord layer are positioned at ratio
Inside the described roller tire radial direction above of bead core,
Described the inner of described first organic fiber cord layer is positioned at the described roller tire radial direction above than described bead core
Outside.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015129631A JP6463226B2 (en) | 2015-06-29 | 2015-06-29 | Heavy duty tire |
| JP2015-129631 | 2015-06-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106274300A true CN106274300A (en) | 2017-01-04 |
| CN106274300B CN106274300B (en) | 2020-05-12 |
Family
ID=57651272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610413056.9A Active CN106274300B (en) | 2015-06-29 | 2016-06-14 | Heavy load tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6463226B2 (en) |
| CN (1) | CN106274300B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108297624A (en) * | 2017-01-13 | 2018-07-20 | 住友橡胶工业株式会社 | Heavy duty pneumatic vehicle tire |
| CN108297626A (en) * | 2017-01-13 | 2018-07-20 | 住友橡胶工业株式会社 | Heavy duty pneumatic vehicle tire |
| CN108297625A (en) * | 2017-01-13 | 2018-07-20 | 住友橡胶工业株式会社 | Heavy duty pneumatic vehicle tire |
| CN111405991A (en) * | 2017-12-06 | 2020-07-10 | 横滨橡胶株式会社 | Pneumatic tire |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6311810B1 (en) * | 2017-02-28 | 2018-04-18 | 横浜ゴム株式会社 | Pneumatic tire |
| JP7480554B2 (en) | 2020-03-30 | 2024-05-10 | 住友ゴム工業株式会社 | Heavy duty pneumatic tires |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61275010A (en) * | 1985-05-29 | 1986-12-05 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire for heavy-load use |
| JP2012106531A (en) * | 2010-11-15 | 2012-06-07 | Sumitomo Rubber Ind Ltd | Tire for heavy load |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4944122B1 (en) * | 1968-05-29 | 1974-11-26 | ||
| JPS6092905A (en) * | 1983-10-27 | 1985-05-24 | Sumitomo Rubber Ind Ltd | Radial tire for heavy load |
| JP2857485B2 (en) * | 1989-11-25 | 1999-02-17 | 住友ゴム工業 株式会社 | 15 ゜ taper tubeless tire |
| JP2682902B2 (en) * | 1991-02-15 | 1997-11-26 | 住友ゴム工業株式会社 | Tubeless radial tires for heavy loads |
| JP2000127719A (en) * | 1998-10-22 | 2000-05-09 | Ohtsu Tire & Rubber Co Ltd :The | Pneumatic radial tire |
| JP5682210B2 (en) * | 2010-10-05 | 2015-03-11 | 横浜ゴム株式会社 | Pneumatic tire |
-
2015
- 2015-06-29 JP JP2015129631A patent/JP6463226B2/en active Active
-
2016
- 2016-06-14 CN CN201610413056.9A patent/CN106274300B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61275010A (en) * | 1985-05-29 | 1986-12-05 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire for heavy-load use |
| JP2012106531A (en) * | 2010-11-15 | 2012-06-07 | Sumitomo Rubber Ind Ltd | Tire for heavy load |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108297624A (en) * | 2017-01-13 | 2018-07-20 | 住友橡胶工业株式会社 | Heavy duty pneumatic vehicle tire |
| CN108297626A (en) * | 2017-01-13 | 2018-07-20 | 住友橡胶工业株式会社 | Heavy duty pneumatic vehicle tire |
| CN108297625A (en) * | 2017-01-13 | 2018-07-20 | 住友橡胶工业株式会社 | Heavy duty pneumatic vehicle tire |
| CN108297626B (en) * | 2017-01-13 | 2021-04-13 | 住友橡胶工业株式会社 | Heavy load pneumatic tire |
| CN111405991A (en) * | 2017-12-06 | 2020-07-10 | 横滨橡胶株式会社 | Pneumatic tire |
| CN111405991B (en) * | 2017-12-06 | 2021-01-15 | 横滨橡胶株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106274300B (en) | 2020-05-12 |
| JP2017013538A (en) | 2017-01-19 |
| JP6463226B2 (en) | 2019-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106274300A (en) | Tyre for heavy load | |
| US10589577B2 (en) | Heavy-duty pneumatic tire | |
| US11135876B2 (en) | Pneumatic tire | |
| US7810535B2 (en) | Pneumatic radial tire | |
| JP6245304B2 (en) | Pneumatic tire | |
| CN103213460B (en) | Pneumatic tire | |
| CN108297626A (en) | Heavy duty pneumatic vehicle tire | |
| JP5075688B2 (en) | Motorcycle tires | |
| US20190143754A1 (en) | Pneumatic Tire | |
| JP2010285107A (en) | Tire for motorcycle | |
| CN100475562C (en) | Pneumatic tire | |
| CN106132732A (en) | Pneumatic tire | |
| JP2007161027A (en) | Pneumatic tire | |
| EP2944484A1 (en) | Pneumatic tire | |
| US20160311269A1 (en) | Reinforced Bias- Or Radial-Carcass Tire | |
| JP2018095135A (en) | Pneumatic tire | |
| JP2004189106A (en) | Pneumatic tire | |
| JP2013086684A (en) | Pneumatic tire and method for manufacturing the same | |
| JP5521880B2 (en) | Pneumatic tire | |
| CN101903189A (en) | Light tyre | |
| US7191812B2 (en) | Pneumatic tire | |
| JP6272014B2 (en) | Pneumatic tire | |
| US20160311270A1 (en) | Reinforced Cross-Ply or Radial-Tire | |
| JP4334945B2 (en) | Pneumatic tire | |
| JP7363937B2 (en) | Pneumatic tires for heavy loads |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |