CN1978226A - Assembly of pneumatic tire and rim - Google Patents
Assembly of pneumatic tire and rim Download PDFInfo
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- CN1978226A CN1978226A CNA2006101621476A CN200610162147A CN1978226A CN 1978226 A CN1978226 A CN 1978226A CN A2006101621476 A CNA2006101621476 A CN A2006101621476A CN 200610162147 A CN200610162147 A CN 200610162147A CN 1978226 A CN1978226 A CN 1978226A
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- noise silencer
- tire
- wheel rim
- air
- inflation tyre
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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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
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Abstract
A pneumatic tire and rim assembly is provided in the cavity with a noise damper in which a sponge material extending in a circumferential direction of the tire and having a volume V2 of 0.4 to 20% of entire volume V1 of the cavity, wherein the noise damper comprises a fixing surface fixed to a surface which surrounds the tire cavity, and a free surface directed to the tire cavity, a maximum value of thickness from the fixing surface to the free surface is in a range of 5 to 50 mm, including a thick mountain portion and a thin valley portion; and at least one of outer ends of the noise damper in the circumferential direction of the tire is formed into an inclined surface portion comprising a first inclined surface rising from the fixing surface and a second inclined surface extending from the first inclined surface to the free surface.
Description
Technical field
The present invention relates to the assembly of a kind of air-inflation tyre and wheel rim, wherein the noise silencer of being made by sponge material is arranged in the tire chamber, has therefore reduced road noise during travelling.
Background technology
In order to reduce road noise during travelling, the patent application that Japan has examined disclose and proposes to be provided with a kind of being included in the tire chamber along the noise silencer of the long ribbon shape sponge material of the circumferencial direction extension of tire for No. 3612059 and Japanese Laid-Open Patent Application 2005-138760 number.Therefore, the energy of the air of the air that produces in tire chamber resonance (sympathetic response of tire chamber) can and alleviate by the noise silencer absorption.
The surface, tire chamber that is fixed to tyre side or wheel rim side by the bottom surface with noise silencer forms noise silencer.This has prevented that noise silencer from moving and friction surface, tire chamber, prevented the mutual friction of noise silencer phase, and prevented the damage of tire and noise silencer in the tire chamber.
In noise silencer, the stress of effect often concentrates on stationary plane (bottom surface) on the outer end on the tire circumferential direction during travelling.Therefore, exist near the outer end of stationary plane sponge material to be easy to the trend of breaking and damaging.
Because the improvement of vehicle output and the increase of express highway length, exist the average ground speed of vehicle also to increase and then be tending towards the lip-deep noise silencer in tire chamber that is fixed to tire is applied the trend of very big power.Especially, when vehicle ', brake and/or when turning to, the external force of various directions is applied on the noise silencer, therefore, have at air-inflation tyre under the situation of this noise silencer, must strengthen the durability of noise silencer, thereby make it can keep long-term use.
In having the tyre and rim assembly of noise silencer, must be reduced in the outer end of various parts of noise silencer and the stress concentration in bight, under the situation that does not have deterioration highway noise reduction effect, strengthen durability.
In noise silencer a (label as shown in figure 10),, when making noise silencer a, stick on the bottom surface with Acrylic Foam Tape sometimes in order to strengthen adhesion operating efficiency to tire.But, when the noise silencer a that is pasted with Acrylic Foam Tape is packaged in the chest or when originating firm is transported to stream in tire manufacturing plant, noise silencer a when transportation because deflection takes place in the vibration and the position of quickening in chest.In addition, outer end e (end of length direction) is easy to collide the wall of chest.At this moment, wrinkling at the Acrylic Foam Tape of outer end, Acrylic Foam Tape adheres to mutually, and peeling paper is stripped from, surface of adherence deterioration, and then adhesion strength deterioration.
Like this, when use had adhered to the tire of this noise silencer, the adhesion section of noise silencer a began to peel off from the outer end b of tire.So, have the problem of the durability deterioration of the durability of noise silencer and tire.And the outward appearance of tire is deterioration also.
The outer end ae that must reduce noise silencer is the quality of one of them at least, reduces the stress that is applied to stationary plane, and then suppresses to break and damage.So, as shown in figure 10, proposed two the outer end aes of noise silencer a on tire circumferential direction for Japanese Laid-Open Patent Application 2005-138760 number and formed inclination face with sharp-pointed top end.
Summary of the invention
Main purpose of the present invention is to provide a kind of tyre and rim assembly, and it can strengthen durability under the situation that does not have deterioration highway noise reduction effect.
The present invention can provide a kind of air-inflation tyre with noise silencer, and it can reduce the stress concentration of noise silencer by thick peak portion and the thin paddy portion between peak portion are provided.
The present invention has the General Construction of air-inflation tyre and wheel rim, it comprises the noise silencer that is arranged in by wheel rim and is assembled to the tire chamber that the air-inflation tyre of this wheel rim forms, and described noise silencer uses 0.4% to 20% the sponge material as the cumulative volume V1 in tire chamber along the circumferencial direction extension of tire and volume V2.
Described noise silencer comprises and being fixed to around the stationary plane on the surface in described tire chamber with towards the free surface in described tire chamber, and the peaked scope of the thickness from described stationary plane to described free surface is 5 to 50mm, comprises thick peak portion and thin paddy portion.
In the outer end of described noise silencer on tire circumferential direction at least one is formed with facial.
The invention is characterized in and describedly tilt facially to comprise from first dip plane of described stationary plane projection and extend to second dip plane of described free surface from described first dip plane.
The scope that is formed on the tiltangle 1 between described first dip plane and the described stationary plane is 60 to 120 degree, and the scope that is formed on the tiltangle 2 between described second dip plane and the described stationary plane is 15 to 70 to spend and it is less than described tiltangle 1.
The free surface that another is characterised in that described noise silencer of the present invention forms wavy on Width with trapezoidal waveform roughly, it is 2.0 to 10.0mm arc that the bight chamfering of described trapezoidal waveform becomes radius of curvature, forms at least two peak portions and is positioned at the paddy portion that it is asked.
In this specification sheets, " the volume V2 " of described noise silencer is the total apparent volume of described noise silencer, is the volume that the outer shape by the noise silencer with air entrapment limits.
" the cumulative volume V1 in tire chamber " roughly obtained by following equation under uncharge state, wherein charges into normal air pressure in assembly.
V1＝A×{(Di-Dr)/2+Dr}×p
Wherein, " A " is the tire cross-sectional area that is in the tire chamber i that tyre assembly under the normal condition and wheel rim obtain by CT scan, and " Di " is the maximum outside diameter of surface, the tire chamber 2i under normal condition, and " Dr " is rim diameter, and " p " is circular constant.
" normal air pressure " is at the determined air pressure of each tire in comprising the measured standard system of tire institute, it is the maximum gas pressure under the JATMA situation, maxim described in " the loading of tire restrictions (TIRE LOAD LIMITS AT VARIOUSCOLD INFLATION PRESSURES) under various cold inflation pressuries " under the TRA situation, " inflation pressure (the INFLATION PRESSURE) " under the situation of ETRTO.When tire is used for passenger vehicle, considering under the situation of frequency of utilization that normal air pressure is 200kPa without exception.
Description of drawings
Fig. 1 is the radial section drawing of embodiment that the assembly of air-inflation tyre of the present invention and wheel rim is shown;
Fig. 2 is the circumferencial direction section drawing of assembly;
Fig. 3 illustrates airtyred radial section drawing;
Fig. 4 is the Width section drawing of noise silencer;
Fig. 5 is the part amplification sectional view of noise silencer;
Fig. 6 is used to explain the scheme drawing of peeling off test;
Fig. 7 (A) is the section drawing of inclination face of outer end of circumferencial direction that has the noise silencer of two sections shapes in the maximum ga(u)ge position, and Fig. 7 (B) is another facial section drawing that tilts.
Fig. 8 (A) is the birds-eye view that the noise silencer of chamfered section is shown, and Fig. 8 (B) is a front elevation, and Fig. 8 (C) is a block diagram;
Fig. 9 is illustrated in the shape of cross section of the noise silencer that uses in the test and the section drawing of size; With
Figure 10 is the section drawing that the inclination face of traditional noise silencer is shown.
The specific embodiment
Below explain embodiments of the present invention based on accompanying drawing.As shown in Figure 1, the assembly 1 of air-inflation tyre and wheel rim comprise air-inflation tyre 3 (being called " tire " sometimes simply) and be fixed on by wheel rim 2 and tire 3 around tire chamber i in noise silencer 4.
Carcass 6 is formed by one or more layers (being one deck in this embodiment) casingply 6A, and wherein organic fiber cord becomes the angle setting of 70 to 90 degree with the circumferencial direction with respect to tire.Turn back around bead core 8 in the two ends of carcass 6.Bracing ply 7 is formed by multilayer (being two-layer in this embodiment) band bundle carcass plies 7A and 7B, and wherein the steel cord is to become the angle setting of 10 to 40 degree or 10 to 30 degree with respect to tire circumferential direction.The steel cord is intersected with each other between carcass plies, thereby has strengthened the band Shu Gangdu of bracing ply 7.If desired, existing belt can be arranged on the outside of bracing ply 7.If desired or can suitably change the structure of tire 2 according to the classification of tire.
Secondly, noise silencer 4 is made by the long ribbon shape sponge material that the circumferencial direction along tire extends.Noise silencer adheres to the surface, chamber (it is tire inner surface 3i) of tyre side, perhaps the surface, chamber of wheel rim side (it is wheel rim inside face 2i).The circumferencial direction of noise silencer 4 usefulness Acrylic Foam Tapes 11 along tire adhered to and fix.This has prevented that noise silencer 4 from moving freely in the tire chamber during travelling, and prevent that noise silencer 4 is damaged, and the sympathetic response that can play stably suppresses effect.Preferably, noise silencer 4 adheres to tire inner surface 3i, considers the wheel rim assembling characteristic, specifically is to adhere to tyre surface inside face 3ti.Tyre surface inside face 3ti is meant the inside face with the contacted fetus face 3t in road surface.In this specification sheets, tyre surface inside face 3ti comprises the width regions TW of the tire axial direction at bracing ply 7 set places at least.As particularly preferred example, noise silencer 4 is mounted to and makes being centered close on the tire equator C of its Width.
By adhering to tyre surface inside face 3ti in this way, the centnifugal force radial outward when running at high speed is pointed to.Therefore, can utilize centnifugal force effectively noise silencer 4 to be compressed tyre surface inside face 3ti, and then can limit its motion.
The sponge material that forms noise silencer 4 is the sponge open texture, is a kind ofly to be made and had the cavernous body of continuous air bubbles or be connected the meshwork that animal fibers, vegetable fibre and syntheticfibres form with one by twining by rubber or synthetic resin.And, comprise not only that in " open texture " continuous air bubbles also comprises separated foam.
Can preferably use: such as the synthetic resin sponge of ether polyurethane sponge, ester group polyurethane sponge, polyvinyl sponge etc.; Rubber sea such as neoprene sponge (CR sponge), EP rubbers sponge (EDPM sponge) and government rubber sponge (NBR sponge) etc.Wherein, with regard to noise abatement ability, in light weight, bubble regulating characteristic and durability, polyurethane sponge, especially ether polyurethane are preferred.The continuous air bubbles sponge material of being made by polyurethane is used for the noise silencer 4 of present embodiment.
According to this sponge material, surperficial and/or inboard porous part is converted into the vibrational energy of air heat energy and has consumed this energy, and the sound among the i of tire chamber (tire chamber sympathetic response energy) is minimized, and then road noise is minimized.Because sponge material easy deformation (contraction, bending), sponge material can not influence the distortion of tire substantially during travelling.Therefore, can prevent the deterioration of road-holding property.Sponge material and hard rubber relatively have very little proportion, can prevent the deterioration of tire weight balance.
If the proportion of sponge material is too high, then the weight of tire increases, if proportion is low excessively, then can not obtain enough intensity, and the sympathetic response of tire chamber suppresses the effect deterioration.Consider above-mentioned situation, preferably, the following of the proportion of sponge material is limited to 0.005 or higher, more preferably is 0.01 or higher.Preferably, the higher limit of proportion is 0.06 or lower, 0.04 or lower, 0.03 or lower.The common range of choice of the proportion of noise silencer 4 is 0.014 to 0.052.
Preferably, noise silencer 4 is that durometer level is 80 to 150N, pulling strengrth is 120 to 160kPa sponge.
When hardness is restricted, guarantee that noise silencer 4 suitably prolongs.When being distorted in noise silencer 4, prolongation helps dispersive stress widely.Particularly preferably, the hardness of sponge material is 90N or more, and its upper limit is 130N or still less, more preferably is 110N or still less.
When the pulling strengrth of sponge material is restricted, strengthen the intensity of anti-stress further.Particularly preferably, the pulling strengrth of sponge material is 130kPa or more, and its upper limit is not particularly limited, but with regard to cost, capacity rating, obtain with regard to the easiness, is limited to 150kPa or still less on preferred.
In this specification sheets, the value that the hardness of sponge material is measured according to the method (6.3) of the method for measurement of " hardness (hardness) " of section defined in 6 of JIS K6400 " flexible polyurethane foam test method (soft polyurethane foam test method) ".
The pulling strengrth of sponge be according to JIS the section 10 in " pulling strengrth and prolongation (tensilestrength and elongation) " about the measured value of the dumbbell test block of Class1.
When high pressure air being charged among the i of tire chamber with compressor, the moisture that comprises in the air (moisture) can enter tire chamber i.Owing to this reason, the ether polyurethane sponge with very strong anti-hydrolytic degradation performance is suitable for use as sponge material.Preferably, sponge material has repellency, thereby when sponge material became wet, moisture can not infiltrate through in the sponge material.In order to prevent that owing to moisture produces mould preferably, sponge material also has the mildew-resistant characteristic.In order to reduce the toxicity of emission gases when damaged tire burns, particularly preferably, form the sponge material of the material that does not have halogen atom.
The volume V2 of noise silencer 4 is set in 0.4% to 20% the scope of cumulative volume V1 of tire chamber i.If the cumulative volume V1 of the volume V2 of noise silencer 4 and tire chamber i than being 0.4% or more, can expect the significant road noise reduction effect that obtains about 2dB.
Can know significantly that in passenger accommodation this noise reduces degree.According to this viewpoint, preferably, the volume V2 of noise silencer 4 be tire chamber i cumulative volume V1 1% or more, more preferably be 2% or more, more preferably be 4% or more, more preferably be 6% or more, more preferably be 7% or more.If the volume V2 of noise silencer 4 surpass tire chamber i cumulative volume V1 20%, road noise reduces effect and can not strengthen again, cost increases, the weight balancing of assembly 1 tends to deterioration.According to this viewpoint, preferably the volume V2 of noise silencer 4 be tire chamber i cumulative volume V1 15% or still less, more preferably 10% or still less.
At this, " volume of noise silencer " is the total apparent volume of noise silencer, the volume that outer shape limited of the noise silencer with inherent bubble of serving as reasons.
" cumulative volume in tire chamber " V1 roughly obtains under no load condition, and wherein air-inflation tyre 2 is assembled to normal wheel rim (not shown) and charges into normal air pressure in assembly.
V1＝A×{(Di-Dr)/2+Dr}×p
Wherein, " A " is the tire cross-sectional area that is in the tire chamber i that assembly obtained of the tyre and rim under the normal condition by CT scan, and " Di " is the maximum outside diameter of surface, the tire chamber 2i under normal condition, and " Dr " is rim diameter, and " p " is circular constant.
Then, Fig. 4 illustrates the cross-sectional plane (the tire meridional cross section that comprises tire axle) of the Width of noise silencer 4.Noise silencer 4 comprises the stationary plane 4L that adheres to and be fixed to tyre surface inside face 3ti and towards the free surface 4U at the center of tire chamber i.The peaked scope of the thickness T from stationary plane 4L to free surface 4U is 5 to 50mm.In this embodiment, noise silencer has the shape of cross section of growing crosswise, and wherein the width W 1 of stationary plane 4L is greater than the maximum of T m of thickness.Maximum of T m and width W 1 be noise silencer 4 be installed on the tire 3 and tire still unassembled to the situation of wheel rim (under normal temperature and normal pressure) measure.The maximum of T m of thickness is with the directional survey of stationary plane 4L right angle intersection, and width W 1 is measured along stationary plane 4L.
Preferably, the maximum of T m of thickness T is 40mm or still less, more preferably is 30mm or still less, more preferably is 25mm or still less.Explain as Fig. 6,, may produce and when tire sets is filled to wheel rim etc., unload the disadvantage that tire-lever and noise silencer 4 disturb mutually if maximum of T m is excessive.If maximum of T m is too small on the other hand, may produce the disadvantage of tire chamber sympathetic response assimilation effect deterioration, preferably, maximum of T m is 10mm or more, more preferably is 15mm or more.
In order to prevent laterally to fall at i place, tire chamber, preferably the width W 1 of noise silencer 4 be bracing ply 7 width TW 20% or more, more preferably be 30% or more, more preferably be 40% or more.Preferably, being limited to 80% or still less on it, more preferably is 70% or still less, more preferably is 65% or still less.
The inventor has carried out taking out test about the tire of the assembly that the noise silencer with rectangular cross section is housed in tyre surface inside face 3ti, and has checked the damaged condition of noise silencer 4.As shown in Figure 6, tire take out test by a plurality of operators with the tire changing changer (not shown) with unload tire-lever f execution.The person has noise silencer before not have the notifying operation.Used the several samples assembly of various noise silencers with different maximum of T m and different tire height to width ratio.
When tire 3 when wheel rim 2 takes out, unload tire-lever f and insert among the tire chamber i.The technical ability of inserting kind (classification, height to width ratio etc.) that length depends on tire, operator is with custom when the operation and different.According to the result of test, if the maximum of T m of the thickness of the noise silencer of discovery assembly is limited in 5 to 50mm, the quantity that noise silencer damages reduces.This is because the operator wishes to prevent to unload tire-lever f usually and tire inner surface 3i is in contact with one another, thereby the insertion length of unloading tire-lever is limited.Therefore, when noise silencer has thin thickness T, can expect that the chance that contacts reduces.But, have height to width ratio be 50% or the situation of still less flat tire under, have the trend that tire-lever f frequently contacts the side surface of noise silencer of unloading.
Therefore, stationary plane 4L is formed with thick peak portion 20 and thin paddy portion 21.As shown in Figure 4, each peak portion 20 comprises that thickness T is the 20t of spine of maximum of T m.In this embodiment, paddy portion 21 has the lowest point 21b, and it is positioned on the offside of peak portion 20 and its thickness T is minimum value Ti.That is, free surface 4U is formed with wavy curve 24, and wherein transversely direction repeats ripple unit 23.Ripple unit 23 comprises the 20t of spine, the lowest point 21b and extends to the rake 22 of the lowest point 21b from the 20t of spine.Noise silencer 4 forms minimum value Ti on the opposite end of the horizontal direction of free surface 4U.Minimum value Ti is limited in 1.0 to 15mm scope.
That is, free surface 4U extends along wavy curve 24, alternately forms thick peak portion 20 and thin paddy portion 21 in noise silencer 4.Still in this embodiment, the two ends in a lateral direction of noise silencer 4 stop with the paddy portion 21 of noise silencer 4, and then the thickness at horizontal direction two ends is minimum value Ti.When the amplitude line of centers KL of wavy curve 24 was root thickness, peak portion 20 can be defined as thicker than amplitude line of centers KL.Paddy portion 21 can be defined as thinner than amplitude line of centers KL.
Owing to form noise silencer 4 two ends in a lateral direction in this way, avoided unloading the contact between tire-lever f and the noise silencer 4 more reliably.Rake 22 is near the arc position that is formed by the tip of unloading tire-lever f.Therefore, contact with noise silencer 4 even unload tire-lever f, also very little at the friction force that unloads between tire-lever f and the rake 22.Like this, the tip of unloading tire-lever f is not easy to thrust noise silencer 4.The green phase mutual effect can prevent effectively that noise silencer 4 from damaging, and prevents that noise silencer 4 from peeling off from tire 3.
In this embodiment, noise silencer 4 has two peak portions 20.Therefore, because the face area of free surface 4U increases, can demonstrate higher sympathetic response and suppress effect.Because paddy portion 21 forms between peak portion 20, when unloading tire-lever f and contact with rake 22, peak portion 20 easily broad ways and then can prevent to unload tire-lever f further and thrusts towards internal strain.And because paddy portion 21 shows thermoradiation efficiency, this helps preventing that noise silencer 4 is by heat damage.
The quantity of peak portion 20 can be one.Though according to capacity rating, in this embodiment, wavy curve 24 preferably comprises the trapezoidal shape of straight line, wavy curve 24 can be sinuous curve.In addition, in wavy curve 24, if its amplitude H is too small, the face area of free surface 4U diminishes, and the sympathetic response in the i of tire chamber suppresses effect and is tending towards reducing, if face area is excessive, the degree of dip of rake 22 becomes precipitous, and the damage of noise silencer 4 prevents the effect deterioration.According to this viewpoint, preferably, the following 4mm or more that is limited to of amplitude H, 8mm or more more preferably is 10mm or more, the upper limit is preferably 44mm or still less, 40mm or still less, 35mm or still less more preferably is 30mm or still less.Preferably, its be maximum of T m 20% or more, be 30% or more more preferably, be limited to 95% or still less, 90% or still less on it, more preferably be 80% or still less.
Shown in Fig. 7 (A) of amplifying, (B), the outer end 4E of noise silencer 4 is provided with facial 30.This has suppressed along the damage of the sponge material of stationary plane 4L generation or has broken.Can expect when causing that by the acceleration/accel that is applied to noise silencer 4 during travelling stress concentration is on the fixed surface of the outer end of circumferencial direction 4E, can cause and break and damage.Therefore, if by facial 30 quality that reduce outer end 4E self that form, the power that is produced by acceleration/accel can reduce, and then can prevent the generation of breaking and damaging.
Shown in Fig. 7 (A), bevelled surface element 30 comprises from the first dip plane 30A of stationary plane 4L projection and extends to the second inclined surface 30B of free surface 4U from the first dip plane 30A.The scope of the tiltangle 1 that forms between the first dip plane 30A and stationary plane 4L is 60 to 120 degree.The scope of the tiltangle 2 that between the second dip plane 30B and stationary plane 4L, forms be 15 to 70 the degree and less than tiltangle 1.Face 30 comprises the second dip plane 30B of the tiltangle 2 with little and gentle slope degree owing to tilt, and can reduce the quality of outer end 4E and suppress to break and damage.
In order to strengthen the efficient that adheres to operation to tire 3, under pasting situation on the stationary plane 4L, Acrylic Foam Tape 11 makes noise silencer 4.The noise silencer made from Acrylic Foam Tape is packaged in the chest, and is transported to stream in tire manufacturing plant by truck from originating firm.Noise silencer 4 is owing to vibration and the acceleration in when transportation departs from its position, with tilt facial 30 and the top end P that intersects of stationary plane 4L be easy to collide the internal face of chest.When top end P was out of shape when colliding largely, Acrylic Foam Tape 11 was wrinkling and slightly crooked at top end P.Acrylic Foam Tape 11 adheres to mutually, and peeling paper is stripped from, and then the adhesive surface deterioration.
Like this, the adhesion portion of noise silencer 4 puts to start with and peels off from tire 3 from top end P, and has the problem of the durability deterioration of the durability of noise silencer 4 and tire 3.
Yet, have the first dip plane 30A in the inclination face 30 of present embodiment, wherein between the second dip plane 30B and stationary plane 4L, have big tiltangle 1 and precipitous degree of dip.So top end P is firm, can avoid situation in when transportation top end P distortion (, Acrylic Foam Tape 11 is wrinkling at top end P place, adhesive tape slightly is out of shape).Can avoid the trouble that Acrylic Foam Tape 11 adheres to mutually and peeling paper is peeled off.The deterioration of the outward appearance that can avoid the adhesive force deterioration of top end P and cause by distortion.
If tiltangle 1 can not be brought into play the deformation effect that prevents at top end P place less than 60 degree.If leaning angle surpasses 120 degree, the weight of the face 30 that tilts fails to reduce, and then near breaking stationary plane 4L/damage and suppress the effect deficiency.Therefore, the lower limit of tiltangle 1 be preferably 70 the degree or more, more preferably be 80 the degree or more, the upper limit be preferably 110 the degree or still less, more preferably be 100 the degree or still less.
If tiltangle 2 is less than 15 degree, too small in the sponge amount of the face 30 that tilts, road noise reduces the effect deterioration.If leaning angle above 70 degree, breaks and damages and suppress the effect deficiency.According to this viewpoint, preferably, tiltangle 2 following is limited to 30 degree or more, and the upper limit is 60 degree or still less, more preferably is 50 degree or still less.
In order to prevent top end P distortion, preferably, the scope of the radial height of the intersection point Q fixed distance face 4L between the first dip plane 30A and the second dip plane 30B is 3 to 15mm.If height is less than 3mm, top end P prevents the deformation effect deficiency.If highly surpass 15mm, performance is not broken and is damaged and suppress effect.The height h be thickness maximum of T m 80% or still less.
Top end P locates to be out of shape significantly at summit J (as shown in Figure 8), and at summit J place, the side surface 4S of noise silencer 4, the first dip plane 30A and fixed surface 4L intersect.Therefore, in this embodiment, form the chamfered section 32 that cuts summit J, suppress the distortion of top end P further.Preferably, the scope of the length L a of chamfered section 32 broad wayss and chamfered section 32 length L b along the circumferential direction is 3 to 10mm.Chamfered section 32 can be dip plane or arcwall face.
Embodiment difference therewith, the inclination face 30 of the outer end 4E of tire circumferential direction can form tapered shape, and its thickness little by little reduces towards the end of circumferencial direction, shown in Fig. 7 (B).The angle θ of the convergent portion between stationary plane 4L and free surface 4U is an acute angle.Preferably, the scope of angle θ is 15 to 70 degree.Preferably, the end face 30C of top end is approximately perpendicular to stationary plane and dissects.End face 30C can strengthen the intensity of two outer end 4E of noise silencer 4 effectively, and prevents that effectively noise silencer from being blocked, dividing and damaging between transportation and storage life.End face 30C is not particularly limited, but the height S of end face is preferably 3mm or more, more preferably is 4mm or more, on be limited to maximum of T m 30% or still less.
For Acrylic Foam Tape, can use such as flaky base material (such as fabric) two surfaces all to be formed with the various adhesive tapes of adhesive-layer and only to use adhesive-layer.In this embodiment, use the former Acrylic Foam Tape.
Acrylic Foam Tape is not subjected to limiting especially, is 5 (N/10mm) or more and less than the adhesive tape of 10 (N/10mm) but preferably use pulling strengrth.The pulling strengrth of Acrylic Foam Tape is measured according to " test method of the pulling strengrth of adhesive tape (the test method oftensile strength of adhesive tape) " of JISZ0237.For example, expectation is peeled off noise silencer 4 to utilize tire again from air-inflation tyre 2, therefore, and the pulling strengrth that Acrylic Foam Tape 5 itself is had to a certain degree.If the pulling strengrth of Acrylic Foam Tape is less than 5 (N/10mm), exist when peel off adhesive tape itself to break and then trend that noise silencer 4 can not surperficial 2i removes from the tire chamber.Equal or height 10 (N/10mm) if the pulling strengrth of Acrylic Foam Tape becomes, cost increases, and this is not suitable for producing in enormous quantities.
Though use Acrylic Foam Tape noise silencer 4 in this embodiment, can use adhesion agent for adhering to operation.
For adhesion agent, can suitably use neoprene be dissolved in the organic solvent the solution-type adhesion agent or such as the neoprene base fluid body adhesion agent of the latex type adhesion agent that in water, spreads.
Enlarged view as shown in Figure 4, the free surface 4U of noise silencer 3 has chamfered section 40, and wherein to be chamfered to be radius of curvature be 2.0 to 10.0mm arc in the bight.Chamfered section 40 comprises outer chamfered section 40a and interior chamfered section 40b, and 20t of spine of chamfered section 40a place and rake 22 intersect outside this, and chamfered section 40b rake 22 intersects with the lowest point 21b in this.
That is, the center Ra of the radius of curvature of outer chamfered section 40a is on the sidepiece of noise silencer 4.The center Rb of the radius of curvature of interior chamfered section 40b is in noise silencer 4 outsides.Interior chamfered section 40b is located on each side of Width both sides of peak portion 20.Interior chamfered section 40b is located at (for the paddy portion 21 at place, horizontal direction two ends, only in in-to-in one side setting) on each sides of paddy portion 21 both sides.
Because free surface 4U roughly is formed with chamfered section 40 in the place, bight of trapezoidal waveform at it, can be reduced in the stress concentration on each angle, even also be like this when tire is subjected to external force and twists.Therefore, can the long term inhibition bight initial rupture at place, and then strengthen the durability of noise silencer.
When the radius of curvature R of chamfered section 40 during less than 2mm, stress concentration is easy to produce at the inner corner portion place of noise silencer 4, and then is easy to produce initial rupture.If the radius of curvature R of chamfered section 40 surpasses 10mm, the shape of noise silencer 4 becomes unintelligible, and then outward appearance impression deterioration.In addition, the face area of the free surface 4U of noise silencer 4 reduces, and existence can not obtain the trend of tire chamber sympathetic response energy absorbing effect fully.According to this viewpoint, preferably, radius of curvature R is 2.5mm or more, is 3.0mm or more more preferably, is limited to 8.0mm or still less on it, more preferably is 7.0mm or still less, more preferably is 6.0mm.
In this embodiment, the period L of the roughly trapezoidal ripple of free surface 4U be noise silencer 4 width W 1 1/2, but the invention is not restricted to this.The shape of cross section of noise silencer 4 is roughly continuous on the circumferencial direction of tire.
For radius R, Fig. 5 illustrates the radius of curvature R a of outer chamfered section 40a can be less than the situation of the radius of curvature R b of interior chamfered section 40b.Because outer chamfered section 40a charges among the i of tire chamber, outer chamfered section 40a can contact with the air among the i of tire chamber.But for example, when noise silencer 4 laterally rolled, stress was easy to concentrate on the interior chamfered section 40b.Therefore, if radius of curvature is set at Ra＜Rb, then can strengthen the durability that road noise reduces effect and can strengthen noise silencer 4 further.
The radius of curvature R a of outer chamfered section 40a does not limit especially with the ratio (Ra/Rb) of the radius of curvature R b of interior chamfered section 40b, if but than too small, the machine up deterioration in characteristics of sponge material.If more excessive than (Ra/Rb), road noise reduces the effect deterioration, is easy to produce in interior chamfered section 40b break etc.According to this viewpoint, preferably, be 0.1 or more than (Ra/Rb), be 0.3 or more more preferably, be limited to 0.9 or still less on it, more preferably be 0.8 or still less.
Though described particularly preferred embodiment of the present invention in detail, the present invention is not limited to illustrated embodiment, can modified in various manners and enforcement the present invention.
(example 1)
(1) noise silencer test
Trial-production has the noise silencer 4 of Acrylic Foam Tape 11, and it has cross sectional dimensions as shown in Figure 9, and wherein two of circumferencial direction outer end 4E are formed with the inclination face 30 with specification as shown in table 1.
Manufacture experimently 100 noise silencers 4, wherein five become the two sectional type setting for one unit.Ten unit are packaged in the chest that internal dimensions is width 540mm * height 335mm * length 1990mm, and they are transported to Fukushima county (Fukushima) from liking county magistrate (Aichi).So that the mode that the sense of motion of the longitudinal length of noise silencer and truck intersects is carried noise silencer 4.
After transportation, check noise silencer 4, wherein peeling paper is rated as the damage product from the noise silencer that facial 30 the top end P of tilting peels off, and relatively damages the generation rate of product.
Each not impaired noise silencer 4 is adhered to tread of tyre inside face 3ti (tire size 215/45R17), rouse durability test.
About sponge material, having used the proportion of being produced by INOAC company is 0.039 ether polyurethane sponge (production number ESH2).
The product (production number 5000NS) that use is produced by NITTO DENKO is as Acrylic Foam Tape.
The length of sponge is 1820mm.
(2) rouse durability test
Use has the drum (diameter 1.7mm) of two projections.Outer surface place at drum is formed with and has trapezoidal cross-section two projections of (be 15mm highly, going to the bottom is 40mm, upper base is 20mm).
Tire with noise silencer is travelled to 10000km under following condition having on the drum of described projection, described condition be interior pressure (230kPa), wheel rim (17 * 7JJ), load (peak load that 6.2kN:JATMA limits 1.2 times), speed (60km/h).
Every 1000km checks in the outer end of the circumferencial direction of noise silencer whether occur breaking or damaging, and finds out the total travel distance when breaking or damage generation.
As shown in table 1, the assembly that can determine present embodiment produces breaking of noise silencer and damages guaranteeing can be suppressed at when road noise reduces effect place, tire circumferential direction outer end, and can strengthen the durability of noise silencer.
Table 1
| Conventional case | Comparative example 1 | Embodiment 1 | |
|
|
Embodiment 5 | Embodiment 6 | Embodiment 7 | |
| Height h (mm) chamfered section of the facial first inclined plane tiltangleθ 1 (degree), second inclined plane tiltangleθ 2 (degree) the intersection point Q tilts | ○ 45 × -- × | ○ 50 ○ 45 20.0 × | ○ 60 ○ 45 11.8 × | ○ 70 ○ 45 7.9 × | ○ 80 ○ 45 6.1 × | ○ 90 ○ 45 5.0 × | ○ 100 ○ 45 4.3 × | ○ 110 ○ 45 3.7 × | ○ 120 ○ 45 3.2 × |
| Damage generation rate (%) durability (total travel distance, the km of unit) of product | 14.6 10000 | 9.6 10000 | 5.0 10000 | 4.2 10000 | 3.3 10000 | 2.9 10000 | 2.1 10000 | 1.3 10000 | 1.3 8000 |
| Comparative example 2 | Comparative example 3 | |
Embodiment 9 | Embodiment 10 | Embodiment 11 | Embodiment 12 | Embodiment 13 | Embodiment 14 | |
| Height h (mm) chamfered section of the facial first inclined plane tiltangleθ 1 (degree), second inclined plane tiltangleθ 2 (degree) the intersection point Q tilts | ○ 130 ○ 45 2.7 × | ○ 140 ○ 45 2.3 × | ○ 90 ○ 45 3.0 × | ○ 90 ○ 45 6.0 × | ○ 90 ○ 45 9.0 × | ○ 90 ○ 45 12.0 × | ○ 90 ○ 45 15.0 × | ○ 90 ○ 45 18.0 × | ○ 90 ○ 45 20.0 × |
| Damage generation rate (%) durability (total travel distance, the km of unit) of product | 1.3 3000 | 0.8 2000 | 4.2 10000 | 2.9 10000 | 2.5 10000 | 1.3 10000 | 0.4 8000 | 0.0 2000 | 0.0 2000 |
-continued-
-continue-
| Embodiment 15 | Embodiment 16 | Embodiment 17 | Embodiment 18 | Embodiment 19 | Embodiment 20 | Embodiment 21 | Embodiment 22 | Embodiment 23 | |
| Height h (mm) chamfered section of the facial first inclined plane tiltangleθ 1 (degree), second inclined plane tiltangleθ 2 (degree) the intersection point Q tilts | ○ 85 ○ 45 5.5 × | ○ 85 ○ 45 11.0 × | ○ 85 ○ 45 15.3 × | ○ 90 ○ 60 8.7 × | ○ 90 ○ 60 13.9 × | ○ 100 ○ 45 4.3 × | ○ 100 ○ 45 8.5 × | ○ 90 ○ 45 5.0 ○(5×5) | ○ 90 ○ 45 5.0 ○(R10) |
| Damage generation rate (%) durability (total travel distance, the km of unit) of product | 3.3 10000 | 2.9 10000 | 2.9 8000 | 0.8 10000 | 0.4 8000 | 2.1 10000 | 0.4 10000 | 0.0 10000 | 0.0 10000 |
In table 1, " zero " meaning is to exist, and " * " meaning is not exist.
(example 2)
According to the specification shown in the table 2, trial-production has the air-inflation tyre of noise silencer.
Used air-inflation tyre with the roughly identical noise silencer of specification with the specification of first embodiment.
Tire size: 215/45ZR17
Bracing ply width B W:166mm
Air pressure: 230kPa
Rim size: 17 * 7JJ
Noise silencer
The specification in the bight of free surface as table 2 illustrate.
The length L of the circumferencial direction of tire: 1840mm
With the taper angle θ cutting of two ends with 45 degree, an end cuts (Fig. 7 (B)) in the mode of S=5mm.
Fixing means: long noise silencer is along the tread area bending on the surface, tire chamber of tire, and pastes with Acrylic Foam Tape (" E700 " that produced by Ebisu-chemical company).
Acrylic Foam Tape has the measure-alike size with the stationary plane of noise silencer.
Test method is as follows:
＜road noise performance 〉
The air-inflation tyre that will have noise silencer is assembled to wheel rim, and is installed on whole wheels of Japanese FF type vehicle of 2000cc.
Vehicle is measured highway (rugged bituminous road) at road noise and is upward travelled with 60km/h.
Noise in the passenger accommodation is collected by the microphone at the ear location place on the sidepiece that is arranged on the driver's seat, measures the acoustic pressure of the peak value of the column sonorant that centers on arrowband 230Hz.
When adopting comparative example, evaluation result is shown with increase/reduction value as benchmark.
At this, 0 (zero) meaning is identical with a reference value, and it is that road noise increases that+(adding) looks like.
＜durability 〉
Make vehicle travel respectively to 2000km, 4000km, 6000km and 8000km rousing on (diameter 1.7m).Drum is provided with two projections (height 15mm, width 15mm) of 180 degree separated from one another
Whether the range estimation noise silencer occurs damaging.
The noise silencer that damages with * illustrate, unspoiled noise silencer illustrates with o.
After noise silencer damaged, test was interrupted.
The interior pressure: 230kPa
Load: 6.2kN (in JATMA, limit peaked 1.2 times)
Moving velocity: 80km/h
In test result shown in the table 2.
According to test result, determine that the air-inflation tyre with noise silencer of present embodiment has outstanding road noise reduction effect and durability.
Table 2
| Comparative example 4 | Comparative example 5 | Embodiment 24 | Embodiment 25 | Embodiment 26 | Embodiment 27 | Embodiment 28 | |
| The radius of curvature R b (mm) of the interior chamfered section of the radius of curvature R a of outer chamfered section (mm) is than (Ra/Rb) | 0 (non-circular) 0 (non-circular) | 1.5 1.5 1.0 | 2.0 2.0 1.0 | 4.0 4.0 1.0 | 6.0 6.0 1.0 | 4.0 6.0 0.67 | 3.0 6.0 0.5 |
| Road noise performance (dB) durability 2000km 4000km 6000km 8000km | Basis *------ | +0.1 ○ × -- -- | +0.1 ○ ○ × -- | +0.2 ○ ○ ○ × | +0.4 ○ ○ ○ ○ | -0.1 ○ ○ ○ ○ | -0.2 ○ ○ ○ ○ |
Claims (7)
1. the assembly of air-inflation tyre and wheel rim, it comprises the noise silencer that is arranged in the tire tire chamber that is formed by wheel rim and the air-inflation tyre that is assembled to this wheel rim, use in this noise silencer along the circumferencial direction of tire and extend and volume (V2) is 0.4% to 20% sponge material of the cumulative volume (V1) in tire chamber, wherein
Described noise silencer comprises and being fixed to around the stationary plane on the surface in described tire chamber with towards the free surface in described tire chamber, the peaked scope of thickness from described stationary plane to described free surface be 5mm to 50mm, comprise thick peak portion and thin paddy portion,
In the outer end of described noise silencer on tire circumferential direction at least one forms and tilts facially, describedly tilt facially to comprise from first dip plane of described stationary plane projection and extend to second dip plane of described free surface from described first dip plane,
The scope that is formed on the leaning angle (θ 1) between described first dip plane and the described stationary plane is 60 to spend to 120 degree, and the scope that is formed on the leaning angle (θ 2) between described second dip plane and the described stationary plane is 15 to spend to 70 degree and it is less than described leaning angle (θ 1).
2. the assembly of air-inflation tyre as claimed in claim 1 and wheel rim, wherein, the scope of the radial height (h) of the described stationary plane of intersection point distance between described first dip plane and described second dip plane is that 3mm is to 15mm.
3. the assembly of air-inflation tyre as claimed in claim 1 and wheel rim, wherein, the inclination face of described noise silencer is formed with the chamfered section that cuts away the summit, and the side surface of described noise silencer, described first dip plane and described stationary plane intersect each other at place, described summit.
4. the assembly of air-inflation tyre as claimed in claim 1 and wheel rim, wherein, with the anchor fitting of Acrylic Foam Tape as described noise silencer.
5. the assembly of air-inflation tyre and wheel rim, it comprises the noise silencer that is arranged in the tire tire chamber that is formed by wheel rim and the air-inflation tyre that is assembled to this wheel rim, use in this noise silencer along the circumferencial direction of described tire and extend and volume (V2) is 0.4% to 20% sponge material of the cumulative volume (V1) in tire chamber, wherein
Described noise silencer comprises and being fixed to around the stationary plane on the surface in described tire chamber with towards the free surface in described tire chamber, and the peaked scope of the thickness from described stationary plane to described free surface is 5 to 50mm, comprises thick peak portion and thin paddy portion,
In the outer end of described noise silencer on tire circumferential direction at least one forms facial, and
The free surface of described noise silencer forms wavy on Width with the form of trapezoidal wave roughly, it is the arc of 2.0mm to 10.0mm that the bight chamfering of described trapezoidal wave becomes radius of curvature, forms at least two peak portions and therebetween paddy portion.
6. the assembly of air-inflation tyre as claimed in claim 5 and wheel rim, wherein, the scope of the radius of curvature of described arc is that 3.0mm is to 6.0mm.
7. the assembly of air-inflation tyre as claimed in claim 5 and wheel rim, wherein, the arc of described noise silencer comprises outer arc and inner arc, the center of described outer arc is on the sidepiece of described noise silencer, and the center of described inner arc is in described noise silencer outside,
The radius of curvature of described outer arc is less than the radius of curvature of described inner arc.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005355129A JP4728790B2 (en) | 2005-12-08 | 2005-12-08 | Pneumatic tire and rim assembly |
| JP2005355129 | 2005-12-08 | ||
| JP2005-355129 | 2005-12-08 | ||
| JP2005359333A JP4960626B2 (en) | 2005-12-13 | 2005-12-13 | Pneumatic tire with noise control |
| JP2005359333 | 2005-12-13 | ||
| JP2005-359333 | 2005-12-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1978226A true CN1978226A (en) | 2007-06-13 |
| CN1978226B CN1978226B (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101621476A Active CN1978226B (en) | 2005-12-08 | 2006-12-06 | Assembly of pneumatic tire and rim |
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| Country | Link |
|---|---|
| JP (1) | JP4728790B2 (en) |
| CN (1) | CN1978226B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941782A (en) * | 2008-01-29 | 2013-02-27 | 住友橡胶工业株式会社 | Pneumatic tire with noise reducer |
| CN107107501A (en) * | 2014-12-04 | 2017-08-29 | 西博自动化公司 | A kind of method and apparatus that band is placed and secured in inside tires |
| CN109070632A (en) * | 2016-12-07 | 2018-12-21 | 住友橡胶工业株式会社 | Pneumatic tire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4960626B2 (en) * | 2005-12-13 | 2012-06-27 | 住友ゴム工業株式会社 | Pneumatic tire with noise control |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1253025B1 (en) * | 2001-04-16 | 2006-02-08 | Sumitomo Rubber Industries Ltd. | Tire noise reducing system |
| JP4318639B2 (en) * | 2002-06-05 | 2009-08-26 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly, and sound absorber used therefor |
| JP3787343B2 (en) * | 2003-11-07 | 2006-06-21 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
| JP4788861B2 (en) * | 2003-11-28 | 2011-10-05 | ヤマハ株式会社 | Steel wire for musical instrument string and method for manufacturing the same |
| JP4044526B2 (en) * | 2004-01-27 | 2008-02-06 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
| JP3934621B2 (en) * | 2004-03-16 | 2007-06-20 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
| JP4485280B2 (en) * | 2004-08-04 | 2010-06-16 | 横浜ゴム株式会社 | Pneumatic tire |
-
2005
- 2005-12-08 JP JP2005355129A patent/JP4728790B2/en active Active
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2006
- 2006-12-06 CN CN2006101621476A patent/CN1978226B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941782A (en) * | 2008-01-29 | 2013-02-27 | 住友橡胶工业株式会社 | Pneumatic tire with noise reducer |
| CN102941782B (en) * | 2008-01-29 | 2015-07-08 | 住友橡胶工业株式会社 | Pneumatic tire with noise reducer |
| CN107107501A (en) * | 2014-12-04 | 2017-08-29 | 西博自动化公司 | A kind of method and apparatus that band is placed and secured in inside tires |
| CN107107501B (en) * | 2014-12-04 | 2018-12-11 | 西博自动化公司 | A kind of method and apparatus that band is placed and secured in inside tires |
| CN109070632A (en) * | 2016-12-07 | 2018-12-21 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN109070632B (en) * | 2016-12-07 | 2020-11-20 | 住友橡胶工业株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4728790B2 (en) | 2011-07-20 |
| JP2007153274A (en) | 2007-06-21 |
| CN1978226B (en) | 2011-02-16 |
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