CN100513207C - Aeration tyre - Google Patents
Aeration tyre Download PDFInfo
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- CN100513207C CN100513207C CNB2006101400524A CN200610140052A CN100513207C CN 100513207 C CN100513207 C CN 100513207C CN B2006101400524 A CNB2006101400524 A CN B2006101400524A CN 200610140052 A CN200610140052 A CN 200610140052A CN 100513207 C CN100513207 C CN 100513207C
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Abstract
The present invention provides a pneumatic tire capable of improving the durability of the pattern blocks arranged in tread. The pneumatic tire of the present invention is a pneumatic tire having a plurality of pattern blocks arranged in tread. At least one pattern block comprises a wheel tread, a wall surface of the side earthing in advance extending from the earthing end edge of the side earthing in advance to the inner side of the radial direction of tire along the rotation direction, and a wall surface of the side earthing behind extending from the earthing end edge of the side earthing behind to the inner side of the radial direction of wheel tread along the rotation direction. Each of the wall surfaces is composed by a base of the wheel tread side, and a concave-circular arc-shaped curved surface part connected with the internal end of the base in the tire radial direction and having a center at the outer side of the tire. The angle of inclination(theta 1)of the base of the side earthing in advance relative to the tire normal line is less than the angle of inclination(theta 2)of the base of the side earthing behind relative to the tire normal line, and the curvature radius(R1)of the curved surface part of the side earthing in advance is less than the curvature radius(R2)of the curved surface part of the side earthing behind.
Description
Technical field
The present invention relates to improve the durability of the pattern block that is arranged at tyre surface, even and under the abominable driving conditions of for example motor-cross etc., also can bring into play the air-inflation tyre of super performance.
Background technology
The vehicle that on irregular ground etc., travels, the general air-inflation tyre that has the block-type tread of pattern block at tyre surface that adopts.In motion, bigger stress is in the foundation part of these pattern blocks.Because such stress, easily rupture in the foundation part of these pattern blocks, and go down, the damage that then causes that pattern block breaks etc. as if this fracture development.
In the past, in order to improve the durability of pattern block, pattern block b had as shown in Figure 8 been proposed.Fig. 8 is along the circumferential section drawing of the tire of pattern block b.This pattern block b comprise the tread b1 that joins with the road surface, from its hand of rotation earlier the ground connection ora terminalis e1 of side begin the cross wall face b2 of side and begin cross wall face b3 to the inboard side earthing behind that extends of tire radius direction from the ground connection ora terminalis e2 of the hand of rotation side earthing behind of tread b1 to the inboard elder generation of extending of tire radius direction.
In addition, earlier the cross wall face b2 of side constitute by the base portion b2a of above-mentioned tread b1 side and with the curved face part b2b that links to each other between the inner i2 of the tire radius direction of this base portion b2a and the bottom of trench c1 and outside tire, have a concave arc shape at center.Similarly, the cross wall face b3 of side earthing behind constitutes by the base portion b3a of tread b1 side and with the curved face part b3b that links to each other between the inner i3 of the tire radius direction of this base portion b3a and the above-mentioned bottom of trench c2 and have a concave arc shape at center in the tire outside.Each curved face part b2b, b3b are alleviated the stress concentration in the foundation part of pattern block b, suppress the generation of fracture.
But, carrying out at high speed on irregular ground when up rally of sailing, motor-cross or desert cross-country race etc., because very large propulsive effort acts on tire, also become very big so act on the stress of pattern block foundation part, therefore, formation in the past can't fully be kept the durability of pattern block.
In addition, in following patent documentation 1, record cross wall that elder generation with pattern block side and side bevelled technology towards the elder generation of tire hand of rotation.Yet this technology also awaits further improving the foundation durability partly of pattern block.
[patent documentation 1] TOHKEMY is put down 11-No. 78427 communiques
Summary of the invention
The present invention In view of the foregoing proposes, its purpose is, provide a kind of at least for a pattern block, the base portion that makes earlier side with respect to the tilt angle theta 1 of tire normal less than the base portion of side earthing behind tilt angle theta 2 with respect to the tire normal, and the radius of curvature R 1 of curved face part that makes earlier side for basic, is not damaged the air-inflation tyre that propulsive effort transmits performance and can improve the durability of pattern block less than the radius of curvature R 2 of the curved face part of side earthing behind.
In addition, technical scheme 2 described inventions be have following feature as technical scheme 1 described air-inflation tyre, that is: in the above-mentioned pattern block, the ground connection ora terminalis that the elder generation of above-mentioned tread side is 2～20 degree with respect to the ground connection ora terminalis of the axial angle [alpha] 1 of tire and the side earthing behind of above-mentioned tread with respect to poor (the α 1-α 2) of the axial angle [alpha] 2 of tire.
In addition, technical scheme 3 described inventions be have following feature as technical scheme 1 or 2 described air-inflation tyres, that is: above-mentioned pattern block has in tire direction of principal axis inboard and above-mentioned elder generation the interior sidewall surface that connects between the wall of the wall of side and above-mentioned side earthing behind, and, the above-mentioned interior sidewall surface of pattern block on tire shoulder that in 25% zone from the tyre surface end to tyre surface ground connection width is the shoulder zone configuration is by constituting with the lower part, that is: be positioned at above-mentioned tread side and with respect to the tire normal with 0～45 degree to the inboard bevelled base portion of tire direction of principal axis, and link to each other with the inner of tire radius direction of base portion in this and the radius of curvature that has the center in the tire outside is the introversion face of the concave arc shape of 2～30mm.
In addition, technical scheme 4 described inventions be have following feature as technical scheme 1 to 3 any described air-inflation tyre, that is: the above-mentioned tread tire Zhou Fangxiang length that forms the tire equator side is roughly trapezoidal shape greater than overlooking of the distolateral tire Zhou Fangxiang length of tyre surface ground connection.
In addition, technical scheme 5 described inventions be have following feature as technical scheme 1 to 4 any described air-inflation tyre, that is: above-mentioned elder generation the base portion of side before the ground connection ora terminalis of side towards the ditch bottom side and to earlier inclination oblique, and, the base portion of above-mentioned side earthing behind from the ground connection ora terminalis of side earthing behind towards the ditch bottom side and backward inclination oblique.
In addition, technical scheme 6 described inventions be have following feature as technical scheme 1 to 5 any described air-inflation tyre, that is: poor (the θ 2-θ 1) at above-mentioned angle of inclination be 1～25 the degree.
In addition, technical scheme 7 described inventions be have following feature as technical scheme 1 to 6 any described air-inflation tyre, the ratio (R2/R1) of promptly above-mentioned radius of curvature is 1.1～40.0.
Air-inflation tyre of the present invention, in pattern block, about earlier the wall of side, the radius of curvature R 1 of the tilt angle theta 1 of base portion and curved face part is made as relative less, guarantee bigger propulsive effort thus.On the other hand,, the radius of curvature R 2 of the tilt angle theta 2 of base portion and curved face part is made as relatively large, suppress the large deformation of pattern block thus, and attenuative effect is in the stress of pattern block root part about the cross wall face of side earthing behind.Thus, air-inflation tyre of the present invention can not damage propulsive effort and transmit performance, and improves the durability of pattern block.
Description of drawings
Fig. 1 is the airtyred section drawing of expression an embodiment of the invention.
Fig. 2 is the expansion drawing of its tyre surface.
Fig. 3 is the X portion enlarged drawing of Fig. 2.
Fig. 4 is its B-B ' section drawing.
Fig. 5 is its C-C ' section drawing.
Fig. 6 is the section drawing of the motoring condition of expression pattern block.
Fig. 7 (A), (B) are the cross section profile line charts of the distortion shape body of expression pattern block.
Fig. 8 is the section drawing of pattern block in the past.
Nomenclature is as follows:
1... air-inflation tyre 2... fetus face 7... pattern block 9... tread
9a... earlier side ground connection ora terminalis 9b... earlier the ground connection ora terminalis of side
10... earlier side wall 10a... earlier the base portion of side
10b... earlier the wall of curved face part 11... side earthing behind of side
11a... the curved face part of the base portion 11b... side earthing behind of side earthing behind
12... base portion 12b... introversion face in the interior sidewall surface 12a...
Angle of inclination R1, the R2 of θ 1, θ 2, θ 3... base portion, the radius of curvature of R3... curved face part
The specific embodiment
Below, with reference to the accompanying drawings an embodiment of the invention are described.
Fig. 1 is the airtyred section drawing of present embodiment, and Fig. 2 is the expansion drawing of its tyre surface, and Fig. 3 is the X portion enlarged drawing of Fig. 2, and Fig. 4 is its B-B ' section drawing (along the section drawing of tire Zhou Fangxiang).In addition, Fig. 1 is the cross section of A-A ' position of Fig. 2.
Air-inflation tyre 1 has fetus face 2, the pair of sidewall portion 3,3 of extending from its two side direction tire radius direction inboard and the bead part 4,4 that links to each other with the inboard of this sidewall portion 3.The air-inflation tyre 1 of present embodiment exemplifies the automatic two-wheel vehicle used tire as irregular ground travels usefulness such as motor bike is cross-country.In addition, in the air-inflation tyre 1 of present embodiment, the hand of rotation when being assemblied in vehicle is determined.Its hand of rotation is represented with symbol R in the drawings.
Air-inflation tyre 1 is reinforced by the carcass 6 that is made of at least one casingply 6A.About casingply 6A, for example be fit to adopt the organic fiber cotton rope.Though not shown, can according to radially with the structure of the tire of oblique grade, suitably dispose buffering and bracing ply in the inside of fetus face 2.
At above-mentioned fetus face 2 a plurality of pattern blocks 7 are set.As can be seen from Figure 2, pattern block 7 more sparsely is provided with.So pattern block sparse distribution configuration improves the ground pressure of each pattern block 7, makes that particularly the quantitative change of nipping of road pavement must be bigger on muddy road etc., guarantees bigger propulsive effort thus.In addition,, between pattern block 7,7, form the ditch 8 (recess) of wide cut, improve earth discharge property by sparse pattern block configuration.
The configuration of the sparse distribution of aforesaid pattern block can be by total pattern block the face area Sb of tread 9 with respect to the ratio (Sb/S) of the gross area S of tyre surface 2a (landfill the hypothesis face area of all ditches 8), grasp quantitatively.As particularly preferred mode, aforementioned proportion (Sb/S) is more than 0.2, more preferably more than 0.3, about the upper limit, is preferably below 0.8, more preferably below 0.6, more preferably below 0.5.
In addition, pattern block 7 when the maximum height BH (as shown in Figure 4) of its tire radius direction hangs down excessively, has to can not get in the sufficient driving on irregular ground or the tendency of braking force.Otherwise, when above-mentioned height B H is too high, driving or glancing impact, very huge moment of flexure acts on the root part of pattern block 7, and has the tendency of the endurance ability deterioration that makes pattern block 7.Though be not particularly limited, the maximum height BH of pattern block 7 is preferably more than the 4.0mm, more preferably more than the 10.0mm, about the upper limit, is preferably below the 18.0mm, more preferably below the 14.0mm.
As shown in Figure 3 and Figure 4, the pattern block 7 of present embodiment comprises that mainly this part is by the roughly rectangular-shaped block that constitutes with the lower part: by the outside face that forms the tire radius direction and constitute the tread 9 of tyre surface 2A face; The elder generation that the elder generation that is positioned at the hand of rotation of tire side the wall 10 of side; Be positioned at the wall 11 of side earthing behind of the side earthing behind of above-mentioned hand of rotation; With the interior sidewall surface 12 that connects in tire direction of principal axis inboard between above-mentioned wall 10 and the above-mentioned wall 11; With the outer side surface 13 that connects in the tire direction of principal axis outside between above-mentioned wall 10 and the above-mentioned wall 11.
Above-mentioned tread 9 by hand of rotation earlier the ground connection ora terminalis 9a of side, be positioned at the ground connection ora terminalis 9b of the hand of rotation side earthing behind of its opposition side, the medial margin 9c that extends at tire direction of principal axis side direction tire Zhou Fangxiang and the lateral border 9d that extends at tire direction of principal axis lateral tire Zhou Fangxiang surrounded.Earlier the ground connection ora terminalis 9a of side tilt with angle [alpha] 1 with respect to the tire direction of principal axis.Above-mentioned angle [alpha] 1 is advisable with for example 1～10 degree.In addition, the ground connection ora terminalis 9b of side earthing behind with earlier the opposite sense of ground connection ora terminalis 9a of side, tilt with angle [alpha] 2 with respect to the tire direction of principal axis.Its angle [alpha] 2 is advisable for example-1～-15 to spend.Thus, the tread 9 tire Zhou Fangxiang length that forms tire equator C side is roughly trapezoidal shape greater than the overlooking of tire Zhou Fangxiang length of tyre surface end 2e side.
By make be positioned at above-mentioned elder generation side and side earthing behind ground connection ora terminalis 9a and (or) 9b tilts with respect to the tire direction of principal axis, tyre surface 7 when driving and glancing impact, pattern block 7 to the basic center by tread 9 and with distortion around the rectangular tire normal of tread.So the pattern block distortion can bring the effect that the earth in the ditch 8 that will press solidly between pattern block 7,7 is controlled more securely, and can improve the earth-grasping force of driving or glancing impact.
Particularly preferably be, as present embodiment, the ground connection ora terminalis 9a that is establishing earlier side is opposite with the inclination of the ground connection ora terminalis 9b of side earthing behind, tread 9 is made as to overlook to trapezoidal substantially shape guarantees sufficient rigidity.As suitable example, above-mentioned angle [alpha] 1 is preferably 2～20 degree with the scope of α 2 poor (α 1-α 2).In addition, be located at when overlooking, the inclination on the above-mentioned angle [alpha] 1 of ground connection ora terminalis, α 2 dextrad is for just.Particularly,, make the mode of the distortion on the pattern block Width different, and improve the road surface and grab the ground effect by above-mentioned angle [alpha] 1 and α 2 are made as opposite sense.Further, be 2～20 degree by poor (the α 1-α 2) that establishes above-mentioned angle, can keep and higher especially make the pattern block rigidity of time spent simultaneously when propulsive effort and side force, and also can when turning, produce bigger side force.When poor (the α 1-α 2) of above-mentioned angle spends above 20, easily produce propulsive effort and descend.
Above-mentioned elder generation the wall 10 of side before the ground connection ora terminalis 9a of side extend to the tire radius direction is inboard, and link to each other with the darkest bottom of trench of ditch 8.In addition, the elder generation of present embodiment the wall 10 of side by constituting with the lower part, that is: the base portion 10a of tread 9 sides that in fact are made of the mono-plane; Link to each other with the inner 10ai of the tire radius direction of this base portion 10a and have the curved face part 10b of the concave arc shape at center in the tire outside.
The wall 11 of above-mentioned side earthing behind extends to tire radius direction inboard from the ground connection ora terminalis 9b of side earthing behind, and links to each other with the above-mentioned bottom of trench of ditch 8.In addition, the wall 11 of the side earthing behind of present embodiment is also by constituting with the lower part, that is: the base portion 11a of tread 9 sides that in fact are made of the mono-plane; Link to each other with the inner 11ai of the radial direction of this base portion 11a and have the curved face part 11b of the concave arc shape at center in the tire outside.
In addition, pattern block 7 is made as follows, that is: earlier the base portion 10a of side with respect to the tilt angle theta 1 of tire normal N less than the base portion 11a of side earthing behind tilt angle theta 2 with respect to the tire normal N, and earlier the radius of curvature R 1 of curved face part 10b of side less than the radius of curvature R 2 of the curved face part 11b of side earthing behind.
At this, earlier side base portion 10a tilt angle theta 1 as shown in Figure 4, along on the cross section of tire equator, the tire normal N that the ground connection ora terminalis 9a of side erects with elder generation at the tread 9 of pattern block 7 compares, with base portion 10a to earlier inclination just be made as when oblique, with base portion 10a backward inclination be made as when oblique negative.In addition, the tilt angle theta 2 of the base portion 11a of side earthing behind is in same cross section, compare with the tire normal that ground connection ora terminalis 9b at the side earthing behind of the tread 9 of pattern block 7 erects, with base portion 11a backward inclination just be made as when oblique, with base portion 11a to earlier inclination be made as when oblique negative.In addition, the tire normal N all meets at right angles with tread 9.
In the pattern block 7 of present embodiment, earlier the base portion 10a of side before the ground connection ora terminalis 9a of side towards ditch 8 and to earlier inclination oblique.In addition, earlier side base portion 11a from the ground connection ora terminalis 9b of side earthing behind towards ditch 8 and backward inclination oblique.That is, exemplify above-mentioned tilt angle theta 1 and θ 2 and be positive situation.
As shown in Figure 6, for example when irregular ground run of softness, connected to chassis pattern block 7 is by road breaking face G down, and cut off by earlier the muddy thing that presses solidly of the wall 10 of side and obtaining than large driving force.At this moment, earlier the radius of curvature R 1 of the above-mentioned tilt angle theta 1 of base portion 10a of side and curved face part 10b more little, can obtain big more propulsive effort.Yet in order to improve earlier the resistance to fracture on the curved face part 10b of side, its radius of curvature R 1 is the bigger the better.The contriver recognizes: for the break resistance of get both these propulsive efforts and pattern block 7, with the radius of curvature R 2 of the tilt angle theta 2 of the base portion 11a of side earthing behind and curved face part 11b be made as respectively with earlier the tilt angle theta 1 of base portion 10a of side and the radius of curvature R 1 of curved face part 10b compare relative big.
In the pattern block 7 of present embodiment, shown in Fig. 7 (A), on (on the muddy road of for example travelling time) under the occasion of the relatively little driving range of the propulsive effort F of pattern block 7 in softness, earlier the base portion 10a of side can be substantially and propulsive effort flexibly be out of shape pro rata.Thus, can stress concentration partly not take place in the root of pattern block 7, and can suppress fracture etc.But, shown in Fig. 7 (B), when propulsive effort surpasses certain numerical value and becomes under the big occasion (when for example travelling on crash-resistant hard pavement), the so-called support effect of the wall 11 by side earthing behind, earlier the angle of base portion 10a of side change be controlled at less than with the proportional angular range of the increase of propulsive effort in.Thus, can not damage the durability that the pattern block propulsive effort transmits performance (tractive property) and improves pattern block.That is, earlier the angle of base portion 10a of side change with propulsive effort and have non-linear relation.
Though do not limit especially, if but poor (the θ 2-θ 1) at above-mentioned angle of inclination is too small, then differ and diminish with in the past pattern block, the tendency that be difficult to get both propulsive effort and break resistance are arranged, otherwise, if poor (the θ 2-θ 1) at above-mentioned angle of inclination is excessive, then the elder generation at pattern block 7 side and side earthing behind, and irregular wear takes place greatly and easily its poor rigidity obviously change.According to this viewpoint, poor (the θ 2-θ 1) at above-mentioned angle of inclination is preferably more than 1 degree, more preferably more than 3 degree, advances-go on foot to be preferably more than 6 degree.About the upper limit, then be preferably below 25 degree, more preferably below 15 degree, more preferably below 10 degree.In view of same viewpoint, the ratio (R2/R1) of above-mentioned radius of curvature R 1, R2 is preferably more than 1.1, more preferably more than 1.2.About the upper limit, be preferably below 40.0, more preferably below 20.0, more preferably below 10.0.
In addition, in the wall 10 of side in above-mentioned elder generation, about the concrete numerical value of the radius of curvature R 1 of the tilt angle theta 1 of base portion 10a and curved face part 10b, owing to can suitably set according to the shape of pattern block and height B H etc., so be not particularly limited at this.But, if these numerical value are too small, the tendency that then has durability to worsen, if instead excessive, then tractive property descends.According to this viewpoint, earlier the tilt angle theta 1 of base portion 10a of side be preferably more than 1 degree, more preferably more than 3 degree.About the upper limit, then be preferably below 15 degree, more preferably below 10 degree.In addition, the radius of curvature R 1 of curved face part 10b is preferably more than the 3mm, more preferably more than the 6mm.About the upper limit, then be preferably below the 40mm, more preferably below the 20mm.
In addition, in the wall 11 of above-mentioned side earthing behind, be not particularly limited about the concrete numerical value of the radius of curvature R 2 of the tilt angle theta 2 of base portion 11a and curved face part 11b.But, if these numerical value are too small, when bigger external force is done the time spent, the effect that suppresses pattern block 7 distortion becomes insufficient easily, if instead excessive, then the rigidity transition of the side earthing behind of pattern block 7 is risen, and is easy to generate irregular wear and side in the elder generation of pattern block.According to this viewpoint, the tilt angle theta 2 of the base portion 11a of side earthing behind is preferably more than 3 degree, more preferably more than 6 degree.Be preferably below 30 degree about the upper limit, more preferably below 15 degree.In addition, the radius of curvature R 2 of curved face part 11b is preferably more than the 6mm, more preferably more than the 10mm.About the upper limit, then be preferably below the 60mm, more preferably below the 40mm.
In addition, fetus face 2 comprise the central portion side crown region CR, with and the shoulder zone SH of both sides.In this manual, establish the zone of shoulder zone SH for 25% scope from tyre surface end 2e to tyre surface ground connection width TW.In addition, pattern block 7 comprises crown pattern block 7A that is configured in above-mentioned crown region CR and the pattern block on tire shoulder 7B that is configured in above-mentioned shoulder zone SH.The center-of-gravity position of pattern block on tire shoulder 7B is at shoulder zone SH, and the center-of-gravity position of crown pattern block 7A is at crown region CR.
In the present embodiment, all these pattern block 7A and 7B have the elder generation that each angle of inclination and radius of curvature have been defined as described above and the wall 10 of side and the wall 11 of side earthing behind.In addition, crown 7A is owing to mainly contain the effect of propulsive effort or braking force, so be enough to as long as limit the formation that above-mentioned elder generation the wall 11 of the wall 10 of side and side earthing behind.Therefore, about medial and lateral wall 12 and 13, can implement in mode arbitrarily.
On the other hand, owing to improved the traction property of tire, so pattern block on tire shoulder 7B has the transversal force effect greater than in the past.For the such transversal force of correspondence, the interior sidewall surface 12 of pattern block on tire shoulder 7B is made of mono-plane in fact and is positioned at the base portion 12a of tread 9 sides and links to each other with the inner 12ai of the tire radius direction of this base portion 12a and the facial 12b of introversion that has the center in the tire outside constitutes.
Among the interior base portion 12a, with respect to the tire normal N that erects at above-mentioned medial margin 9c, be preferably more than 1 degree, the mode of the above tilt angle theta 3 of 3 degree more preferably, ditch 8 side direction tire direction of principal axis inboards (tire equator C side) tilt.In addition, about the facial 12b of above-mentioned introversion, its radius of curvature R 3 is preferably more than the 2mm, more preferably more than the 10mm, and is made of concaved circular cambered surface.
Even such interior sidewall surface 12 has bigger transversal force effect, also can be suppressed at the fracture on the curved face part of medial and lateral wall 12,13, and can improve the durability of pattern block.
At this, even the radius of curvature R 3 of the facial 12b of the above-mentioned tilt angle theta 3 of base portion 12a and introversion is excessive in above-mentioned, also suppressed to transition by the distortion that transversal force caused in turning, existence damages the edge effect of decorative pattern and can not bring into play sufficient lateral control force, is not preferred therefore.According to this viewpoint, above-mentioned tilt angle theta 3 is preferably below 30 degree, and more preferably below 10 degree, in addition, above-mentioned radius of curvature R 3 is preferably below the 40mm, more preferably below the 20mm.
In addition, establishing above-mentioned tyre surface ground connection width TW is: in principle at the regular load of load on the tire of normal state and with the axial ultimate range of tire between the ground terminal of the camber angle of 0 degree and the tyre surface 2a under the state that joins of plane.But, as described in present embodiment, when tire is automatic two-wheel vehicle used tire, will be that the tire direction of principal axis distance between tyre surface end 2e, the 2e is made as the ground connection width exceptionally in the axial outermost end of tire of tyre surface 2a under the normal state.
In addition, normal state is meant mounting of tyre is arrived regular wheel rim, and filled regular interior uncharge state of pressing." regular wheel rim " is meant in the schematism of the specification that comprises tire institute foundation, and this specification is by the wheel rim of each tire defined.For example, if JATMA then is a standard rim, if TRA then is " a design wheel rim (Design Rim) ", if ETRTO then is " measuring wheel rim (Measuring Rim) ".In addition, " press in regular " and be meant in the schematism of the specification that comprises tire institute foundation, each specification is by the air pressure of each tire defined, promptly if JATMA, then be the highest air pressure, if TRA, the then maxim of being put down in writing for table " TIRE LOAD LIMITSAT VARIOUS COLD INFLATION PRESSURES ", if ETRTO then is " inflation pressure (INFLATION PRESSURE) ".But tire is a car when using tire, then is 180kPa.
In addition, " regular load " is meant in the schematism of the specification that comprises tire institute foundation, each specification is by the load of each tire defined, promptly if JATMA, then be the peak load ability, if TRA, the then maxim of being put down in writing for table " TIRE LOAD LIMITS AT VARIOUS COLDINFLATION PRESSURES ", if ETRTO then is " load-carrying capacity (LOAD CAPACITY) ".But tire is a car when using tire, is made as 88% the load that is equivalent to above-mentioned load.
In addition, in the present embodiment, above-mentioned outer side surface 13 is made of mono-plane in fact and is positioned at the outer base portion 13a of tread 9 sides and links to each other with the inner 13ai of the tire radius direction of this outer base portion 13a and the facial 13b of outcurve that has the center in the tire outside constitutes.Outer base portion 13a is preferably with more than 1 degree with respect to the tire normal N that erects at above-mentioned lateral border 9d, more preferably with the above tilt angle theta 4 of 3 degree, comes to tilt to the tire direction of principal axis outside (tyre surface end 2e side).In addition, about the facial 13b of above-mentioned outcurve, its radius of curvature R 4 is preferably more than the 2mm, more preferably more than the 10mm, and is made of concaved circular cambered surface.
Such outer side surface 13, by with the synergism of above-mentioned interior sidewall surface 12, help to improve the resistibility of pattern block 7 for transversal force, prevent from effectively on side wall surface 12 or 13, to rupture.
As detailed above, air-inflation tyre of the present invention not only can be used for automotive bicycle, also is suitable as three-wheel cross-country car or four-wheel tire for vehicles.In addition, as particularly preferred mode, the tread 9 of establishing all pattern block on tire shoulder 7B is: the tire Zhou Fangxiang length of tire equator C side is roughly trapezoidal shape greater than the overlooking of tire Zhou Fangxiang length of tyre surface end 2e side.Thus, can have the shape of the opposing propulsive effort bigger, can further improve the stability of the straight ahead on cross-country road simultaneously than the transversal force in the turning.
[embodiment]
With the pattern block of Fig. 2 arrange and the specification of table 1 to make multiple tire size be 120/90-19 automatic two-wheel vehicle used air-inflation tyre, and its performance is estimated.The main points of test are as follows.
＜tractive property 〉
Use is equipped with the vehicle of the various tires that are for experiment in following condition, the motor-cross road that makes it travel and constitute by irregular ground, according to 10 drivers' sensation, be the center with the transitivity of propulsive effort, be that 5 methods of 3.0 are estimated by example 1 in the past.The result is the aviation value of n=10.This numerical value is the bigger the better.In addition, wheel rim and vehicle are as follows.
Wheel rim: 2.15WM
The interior pressure: 90kPa
The cross-country automotive bicycle of using of the motor bike of vehicle: free air capacity 450cc
Mounting of tyre wheel: trailing wheel
The durability of＜pattern block 〉
Carry out 20 minutes high-ball in the motor-cross road twice with the various tires that are for experiment, by range estimation, the number of the pattern block of fracture has partly taken place in investigation in root.The condition of wheel rim and vehicle etc. is same as described above.Test results etc. are as shown in table 1
[table 1]
The result of test, the tire of embodiment has been brought into play the fact that high drive on irregular ground transmits performance and good pattern block durability and has been obtained affirmation.
Claims (7)
1. air-inflation tyre, it is characterized in that for be provided with the air-inflation tyre of a plurality of pattern blocks at fetus face,
At least one pattern block comprise tread, from its hand of rotation earlier the ground connection ora terminalis of side begin the wall of side and begin wall to the inboard side earthing behind that extends of tire radius direction from the ground connection ora terminalis of the hand of rotation side earthing behind of above-mentioned tread to the inboard elder generation of extending of tire radius direction;
Above-mentioned each wall is by the base portion of above-mentioned tread side and link to each other with the inner of the tire radius direction of this base portion and the curved face part that has the concave arc shape at center in the tire outside constitutes,
And, the base portion of wall that above-mentioned elder generation side with respect to the angle of inclination (θ 1) of tire normal less than the base portion of the wall of above-mentioned side earthing behind angle of inclination (θ 2) with respect to the tire normal,
And above-mentioned elder generation the radius of curvature (R2) of the radius of curvature (R1) of the curved face part of side less than the curved face part of above-mentioned side earthing behind.
2. air-inflation tyre according to claim 1, it is characterized in that, in the above-mentioned pattern block, the ground connection ora terminalis that the elder generation of above-mentioned tread side is 2～20 degree with respect to the ground connection ora terminalis of the axial angle of tire (α 1) and the side earthing behind of above-mentioned tread with respect to poor (the α 1-α 2) of the axial angle of tire (α 2).
3. air-inflation tyre according to claim 1 and 2 is characterized in that,
Above-mentioned pattern block has in tire direction of principal axis inboard above-mentioned elder generation the interior sidewall surface that connects between the wall of the wall of side and above-mentioned side earthing behind, and,
The above-mentioned interior sidewall surface of pattern block on tire shoulder that in 25% zone from the tyre surface end to tyre surface ground connection width is the shoulder zone configuration is by constituting with the lower part, that is: be positioned at above-mentioned tread side and with respect to the tire normal with 1～30 degree to the inboard bevelled base portion of tire direction of principal axis; And
The radius of curvature that links to each other with the inner of the tire radius direction of base portion in this and have the center in the tire outside is the introversion face of the concave arc shape of 2～30mm.
4. air-inflation tyre according to claim 1 and 2 is characterized in that, the tire Zhou Fangxiang length that above-mentioned tread forms tire direction of principal axis inboard is roughly trapezoidal shape greater than the overlooking of tire Zhou Fangxiang length outside the tire direction of principal axis.
5. air-inflation tyre according to claim 1 and 2, it is characterized in that, above-mentioned elder generation the base portion of wall of side before the ground connection ora terminalis of side towards the ditch bottom side and to earlier inclination oblique, and the base portion of the wall of above-mentioned side earthing behind from the ground connection ora terminalis of side earthing behind towards the ditch bottom side and backward inclination oblique.
6. air-inflation tyre according to claim 1 and 2 is characterized in that, poor (the θ 2-θ 1) at above-mentioned angle of inclination is 1～25 degree.
7. air-inflation tyre according to claim 1 and 2 is characterized in that, the ratio (R2/R1) of above-mentioned radius of curvature is 1.1～40.0.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005308883 | 2005-10-24 | ||
| JP2005308883A JP4690852B2 (en) | 2005-10-24 | 2005-10-24 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1955021A CN1955021A (en) | 2007-05-02 |
| CN100513207C true CN100513207C (en) | 2009-07-15 |
Family
ID=38062656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101400524A Expired - Fee Related CN100513207C (en) | 2005-10-24 | 2006-10-11 | Aeration tyre |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4690852B2 (en) |
| CN (1) | CN100513207C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107848339A (en) * | 2015-07-15 | 2018-03-27 | 株式会社普利司通 | Pneumatic tire for bicycle |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009023601A (en) * | 2007-07-23 | 2009-02-05 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP5039191B2 (en) * | 2010-08-26 | 2012-10-03 | 住友ゴム工業株式会社 | Motorcycle tires for running on rough terrain |
| JP5320491B2 (en) * | 2011-07-13 | 2013-10-23 | 住友ゴム工業株式会社 | Motorcycle tires for running on rough terrain |
| EP2731810B1 (en) | 2011-07-14 | 2018-01-03 | Compagnie Générale des Etablissements Michelin | Method and device for manufacturing of tires for improved uniformity and endurance of aggressive tread designs |
| WO2013009314A1 (en) * | 2011-07-14 | 2013-01-17 | Michelin Recherche Et Technique, S.A. | Method and tire for improved uniformity and endurance of aggressive tread designs |
| JP5374565B2 (en) * | 2011-10-28 | 2013-12-25 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5647642B2 (en) | 2012-04-09 | 2015-01-07 | 住友ゴム工業株式会社 | Pneumatic tire for running on rough terrain |
| JP5957429B2 (en) * | 2013-10-16 | 2016-07-27 | 住友ゴム工業株式会社 | Motorcycle tires for running on rough terrain |
| JP6241936B2 (en) * | 2014-02-24 | 2017-12-06 | 住友ゴム工業株式会社 | Motorcycle tire for rough terrain |
| JP6027589B2 (en) * | 2014-10-08 | 2016-11-16 | 住友ゴム工業株式会社 | Motorcycle tires |
| WO2017010061A1 (en) * | 2015-07-15 | 2017-01-19 | 株式会社ブリヂストン | Pneumatic tire for two-wheeled automotive vehicle |
| CN105459735B (en) * | 2015-12-29 | 2017-06-13 | 厦门正新橡胶工业有限公司 | Bicycle tyre surface pattern structure |
| JP6899204B2 (en) * | 2016-09-07 | 2021-07-07 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
| JP6805738B2 (en) * | 2016-11-08 | 2020-12-23 | 住友ゴム工業株式会社 | Tires for running on rough terrain |
| JP6834423B2 (en) * | 2016-12-01 | 2021-02-24 | 住友ゴム工業株式会社 | Motorcycle tires for running on rough terrain |
| JP6871530B2 (en) * | 2017-03-17 | 2021-05-12 | 住友ゴム工業株式会社 | Motorcycle tires |
| WO2020031641A1 (en) | 2018-08-09 | 2020-02-13 | 株式会社ブリヂストン | Motorcycle tire |
| EP3795386B1 (en) | 2018-08-09 | 2023-11-01 | Bridgestone Corporation | Motorcycle tire |
| JP2022096974A (en) | 2020-12-18 | 2022-06-30 | 株式会社ブリヂストン | Tire for bicycle |
| JP2022178198A (en) * | 2021-05-19 | 2022-12-02 | 住友ゴム工業株式会社 | Off-road traveling tire |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5572404A (en) * | 1978-11-27 | 1980-05-31 | Bridgestone Corp | Moto-cross tire for motor-cycle |
| JPS5572405A (en) * | 1978-11-27 | 1980-05-31 | Bridgestone Corp | Moto-cross tire for motor-cycle |
| JP3384716B2 (en) * | 1997-09-02 | 2003-03-10 | 住友ゴム工業株式会社 | Pneumatic tire |
| JPH11170815A (en) * | 1997-12-11 | 1999-06-29 | Bridgestone Corp | Pneumatic tire with lug |
| JP3308251B2 (en) * | 1999-12-07 | 2002-07-29 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP3405700B2 (en) * | 1999-12-07 | 2003-05-12 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP4233387B2 (en) * | 2003-05-27 | 2009-03-04 | 株式会社ブリヂストン | PNEUMATIC TIRE AND METHOD OF INSTALLING PNEUMATIC TIRE |
-
2005
- 2005-10-24 JP JP2005308883A patent/JP4690852B2/en not_active Expired - Fee Related
-
2006
- 2006-10-11 CN CNB2006101400524A patent/CN100513207C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107848339A (en) * | 2015-07-15 | 2018-03-27 | 株式会社普利司通 | Pneumatic tire for bicycle |
| CN107848339B (en) * | 2015-07-15 | 2019-09-24 | 株式会社普利司通 | Pneumatic tire for bicycle |
| US10780744B2 (en) | 2015-07-15 | 2020-09-22 | Bridgestone Corporation | Motorcycle pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1955021A (en) | 2007-05-02 |
| JP4690852B2 (en) | 2011-06-01 |
| JP2007112396A (en) | 2007-05-10 |
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