• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a tire (1) comprising a tread (2) and a shoulder zone (3), the tread being intended to come into contact with a road surface to form a contact area (A), said tread tread (2) having a plurality of substantially transverse grooves (23) opening into the shoulder area (3) of the tire (1). It is characterized in that the tread (2) comprises in at least one of the transverse grooves (23) a protruding element (26) with respect to a bottom (230) of said transverse groove (23) and in that the contact area (A) being delimited by an edge (Ab), the protruding element (26) is located near this edge (Ab).
    公开号:FR3026347A1
    申请号:FR1459251
    申请日:2014-09-30
    公开日:2016-04-01
    发明作者:Bruno Guimard；Jean-Claude-John Faure；Mathieu Vandaele
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION [01] The present invention relates to a tire for a motor vehicle comprising a tread and a shoulder zone, the tread being intended to enter into a tread. in contact with a roadway to form a contact area, said tread having a plurality of substantially transverse grooves opening into the shoulder area of the tire. STATE OF THE ART [02] A tire comprises, in known manner, an internal carcass, a tread, a shoulder zone, a sidewall and a rim fastening bead. The inner carcass is composed of at least one carcass ply of rubber-coated threads. During a tire manufacturing step, this carcass ply is cut and assembled on a drum. Furthermore, the carcass ply is surmounted by a plurality of vertex plies superimposed and crossed between them. The crown plies make it possible to stiffen the crown of the tire. The tread is laid over the top tablecloths. For each crown ply, there is a certain distance between the end of a crown ply and the edge of the flank. Due to the superposition of the crown sheets between them, there is therefore a gap between the ends of the different crowns at the level of the border between the shoulder zone and the tread. At this boundary, the tread has a longitudinal groove which allows water to be removed from the tread. [3] A disadvantage of this state of the art lies in the fact that the border between the shoulder area and the tread has a certain fragility. Thus, if a pebble enters the transverse groove that is at the border, it can create a crack that can propagate in the tire.
    [0002] DEFINITIONS [4] "Pneumatic" means all types of elastic tires subjected to internal pressure or not. [05] "Rubber material" means a diene elastomer, that is to say in known manner an elastomer derived from at least in part (ie homopolymer or copolymer) of monomers dienes (monomers carrying two carbon-carbon double bonds, conjugated or not). [6] "Tread" of a tire means a quantity of rubber material delimited by side surfaces and by two main surfaces, one of which, called a tread surface, is intended to come into contact with a tire. when the tire is rolling. [7] "Sidewall" of a tire means a side surface of the tire disposed between the tread of the tire and a bead of the tire. [8] By contact area means all the points of the tread that come into contact with the roadway at a given moment when the tire, inflated to its reference pressure rolls on the roadway. The reference inflation pressure is defined in the conditions of use of the tire as defined in particular by the standard E.T.R.T.0 ("European Tire and Rim Technical Organization".
    [0003] SUMMARY OF THE INVENTION [09] The invention relates to a rubber tire comprising a tread and a shoulder zone, said tread being intended to come into contact with a road surface to form an area of contact, said web having a plurality of substantially transverse grooves opening into the shoulder zone of the tire. The tread has in at least one of the transverse grooves a protruding element with respect to a bottom of said transverse groove and the contact area being delimited by an edge, the protruding element is located near this edge. [10] The protruding element protects the bottom of the transverse groove so as to reduce the risk of cracks appearing at this level. [11] In a non-limiting embodiment, the tread comprises a longitudinal groove and the protrusion member is located at an intersection between said longitudinal groove and said transverse groove. [12] This avoids the retention of pebbles at the intersection. [13] In a non-limiting embodiment, the transverse groove comprises at least one chamfer. [14] This further decreases pebble retention since they will not be retained by sharp edges of the edge of said transverse groove. [15] In a nonlimiting embodiment, the tread comprising at least one wear indicator of height H, the protruding element has a mean height less than the height of the wear indicator and greater than 0 , 5 mm. [16] With such a height, the protruding element can be used as a wear indicator for an observer of the tire. The latter can thus check the state of wear of the tire at the shoulder area. Indeed, as a wear indicator, the protruding element is more visible than the statutory wear indicators 30 which are located at the center of the tread. The protruding element as a wear indicator is thus complementary to the regulatory wear indicators in order to improve the overall verification of the state of the tire by the observer. The height of the wear indicator is less than the height of the statutory wear indicators (at least 1.6 mm) to take into account the observed uses and possibly the degressivity of the new tread depth of the tire. In fact, at the contact edge, the height of the rubber is generally lower than the height of the rubber in the center of the tread. [17] In a non-limiting embodiment variant, the average height of the protruding element is between 0.6 and 1 mm. [18] This improves the wear reading by the user via the protruding element. [19] In a non-limiting embodiment, the protruding element has a streamlined shape. [20] This makes it easier to evacuate the water in said transverse groove. [21] In a nonlimiting embodiment, the tread comprises a plurality of protuberance elements regularly distributed over the circumference of the tire. [22] This allows an observer of the tire to easily check the tire as a whole if the tire begins to wear. [23] In a non-limiting embodiment, the transverse groove flares towards the shoulder zone of the tire. [24] This allows better evacuation of water around the protruding element. [25] In a nonlimiting embodiment, the transverse groove comprises a bridging at the intersection between said transverse groove and the longitudinal groove, said bridging having an inclined face extending from said intersection towards the shoulder area of the tire. [26] This allows better evacuation of water. [27] In a non-limiting embodiment, the bridging comprises an incision on the inclined face. [28] This provides a less rigid transverse groove. Flattening said tire is thus facilitated. BRIEF DESCRIPTION OF THE DRAWINGS [29] Other characteristics and advantages of the invention will emerge from the following description, given by way of example, without limitation, with reference to the appended drawings, in which: FIG. cutting a tire having a tread and a shoulder zone according to the invention according to a non-limiting embodiment; - Figure 2 schematically shows a top view of the tire of Figure 1; - Figure 3 shows a perspective view of a transverse groove of the tire of Figure 1 according to a first non-limiting embodiment; FIG. 4 represents a perspective view of a transverse groove of the tire of FIG. 1 according to a second nonlimiting embodiment; - Figure 5 shows a perspective view of a transverse groove of the tire of Figure 1 according to a third non-limiting embodiment; - Figure 6 shows a sectional view A-A 'of a portion of the tire of Figure 2 according to a first non-limiting embodiment; - Figure 7 shows a sectional view A-A 'of a portion of the tire of Figure 2 according to a second non-limiting embodiment; - Figure 8 shows the transverse groove of Figure 3, with an additional incision; Fig. 9 shows the transverse groove of Fig. 4, with an additional incision; - Figure 10 shows the transverse groove of Figure 5, with an additional incision. [30] In the following description, substantially identical or similar elements will be designated by identical references. [31] Figure 1 shows a sectional view of a tire 1 comprising a tread 2, a shoulder zone 3 and a sidewall 4. The shoulder zone 3 is a transition zone between the sidewall 3 and the tread 2. The shoulder zone 3 is not intended to come into contact with a roadway. The tread 2 is intended to come into contact with a roadway to form a contact area A. [32] In FIG. 1 are also illustrated the attachment bead 10 with a rim, a carcass ply 11 and two top plies. 12 and 13. [33] The tread 2 has a plurality of longitudinal grooves 21,22 (also called circumferential grooves or treads). The longitudinal grooves referenced 22 are the grooves which are on the edges Ab of the contact area A, namely at the boundary between the tread 2 and the shoulder zone 3. [34] As illustrated in FIG. 2, the tread 2 also comprises a plurality of substantially transverse grooves 23 opening into the shoulder zone 3 of the tire. By substantially transverse means that a groove 23 is disposed at plus or minus 20% relative to a direction parallel to the axis of rotation of the tire 1. The tread 2 further comprises at least one wear indicator 25. In the non-limiting example illustrated it comprises two wear indicators 25. These wear indicators 25 are located at the bottom of longitudinal grooves 21 and have a height H of 1.6 mm. They are located in the center of the tread 2 at the contact area A. [35] The contact area A is illustrated in FIG. 2. It comprises a maximum width C defined by the ETRTO standard which is equal to C = (1.075-0.005ar) * Sim with ar the nominal aspect ratio and s the size of the theoretical coil on the measuring rim. [36] In addition, the tread 2 has in at least one of the transverse grooves a protruding element 26 with respect to a bottom 230 of said transverse groove 23. The contact area A is delimited by an edge Ab, l protruding element 26 is located near this edge Ab. By proximity means that the center 260 of the protruding element 26 is within plus or minus 5% of this edge Ab.
    [0004] In FIG. 2, in the nonlimiting example illustrated, the center 260 is located exactly on one of the edges Ab. [37] This protruding element 26 serves as an indicator of tire wear. Thus, an observer of the tire 1 can easily check whether the tire 1 starts to wear by observing the tire at the shoulder zone 3. [38] So that the observer does not waste time looking for the element in question. protrusion 26, in a non-limiting embodiment, the tread 2 comprises a plurality of protuberance elements 26 regularly distributed over the circumference of the tire 1 and in particular in different transverse grooves 23. [39] The protruding element 26 has an average height hl less than the height H of the wear indicator 25 and greater than 0.5 mm. This protruding element which is thus at the boundary between the shoulder zone 3 and the tread 2 is thus more easily visible than the wear indicators 25 which are in the center of the tread 2. [40] a non-limiting embodiment variant, the average height hl of the protruding element 26 is between 0.6 and 1 mm. This value range is sufficient to allow an observer of the tire to observe the wear of the tire. [41] As can be seen in Figure 2 or Figure 3, in a non-limiting embodiment, the protruding element 26 has a streamlined shape. The protruding element is thus hydrodynamic since it allows the water to flow easily, unlike a rectangular or square shape, for example. This shape is hydrodynamic in the flow direction from the transverse groove. In another non-limiting embodiment, the protruding element 26 may have a triangle shape with a vertex of the triangle oriented towards the center of the tread 2 and the base of the triangle facing the shoulder zone. This orientation facilitates the flow of water towards the outside of the contact area. [42] Similarly, in order to allow a better evacuation of the water especially around the protruding element 26, in a non-limiting embodiment, the transverse groove 23 flares towards the shoulder zone 3 of the 1 when the tire 1 rolls on the road, pebbles can be inserted in the various longitudinal grooves 21,22 and the transverse grooves 23 of the tire 1 and in particular pebbles can become jammed more easily in an intersection between a longitudinal groove 21,22 and a transverse groove 23, especially at the beginning of life of the tire. The retention of pebbles in these intersections can lead to cracking in the grooves. [44] In order to avoid pebble retention as much as possible, several means are used and are described below. [45] In a non-limiting embodiment illustrated in FIG. 2 and FIG. 4, the protruding element 26 is situated at an intersection between the longitudinal groove 22 and the transverse groove 23 in which the protruding element 26 is willing. Element 26 thus prevents pebbles from getting stuck at the intersection where it is located. [46] In a non-limiting embodiment, the transverse groove 23 comprises at least one chamfer 231. As illustrated in Figure 5, the transverse groove 23 comprises two chamfers 231. This further reduces the retention of pebbles. The chamfer 231 which is located at the intersection also eliminates sharp edges at the intersection, sharp edges which are mechanically fragile. This chamfer can have a complex geometry: variable height, with or without additional curvature. [47] Fig. 5 illustrates an embodiment wherein the transverse groove 23 comprises the bevel 231 and wherein the protruding member 26 is located at an intersection between said longitudinal groove 22 and said transverse groove 23. [48] In order to reinforce the mechanical strength of the transverse groove 23, in a non-limiting embodiment, the transverse groove 23 comprises a bridging 232 at the intersection between said transverse groove 23 and the longitudinal groove 22, said bridging 232 having a inclined face 233 extending from said intersection 15 towards the shoulder zone 3 of the tire 1. The bridging thus has a profile in the form of a slide. The bridging 232 is illustrated in the sectional view AA 'of FIG. 6. [49] The bridging 232 is an attached gum element which makes it possible to bind the two faces facing each other 234 and 235 of the transverse groove 23. The inclined face 233 of the bridge 232 makes it possible to evacuate the water easily. [50] In a first nonlimiting embodiment illustrated in Figure 6, the inclined face 233 of the bridge 232 is straight. [51] In a second non-limiting embodiment illustrated in Figure 7, the inclined face 233 of the bridge 232 is curved. [52] In order to obtain a less rigid transverse groove 23 in order to facilitate the flattening of the tire 1, in a non-limiting embodiment, the bridging 232 comprises an incision 24 on the inclined face 233 as illustrated. 8 to 10. As shown, the incision 24 is disposed at the center of the bypass 232 and stops in front of the protuberance member 26. It should be noted that the depth of the incision 24 is less than the depth. h2 transverse groove 23. [53] Figure 8 illustrates the embodiment of the transverse groove 23 of Figure 3 with the additional incision 24, embodiment in which the protruding element 26 is not located at an intersection between the transverse groove 23 in which it is located and a longitudinal groove 22. [54] Figure 9 illustrates the embodiment of the transverse groove 23 of Figure 4 with the additional incision 24, an embodiment in leque the protuberance element 26 is situated at an intersection between the transverse groove 23 in which it is located and a longitudinal groove 22. [55] FIG. 10 illustrates the embodiment of the transverse groove 23 of FIG. the additional incision 24, an embodiment in which said transverse groove 23 comprises a chamfer 231. [56] The invention is not limited to the examples described and shown and various modifications can be made without departing from its scope. Thus, in a non-limiting embodiment, the bridging has a completely domed shape. Thus, in a non-limiting embodiment, the transverse groove that supports the protruding element may comprise a chamfer without the protruding element being located at an intersection between said transverse groove and a longitudinal groove.
    [0005] Thus, in a non-limiting embodiment, the transverse groove that supports the protrusion element may comprise a chamfer and a bridging with an incision without the protruding element being located at an intersection between said transverse groove and a groove. longitudinal groove. [57] Thus, the invention described has the following advantages in particular: it provides an additional means for an observer of the tire to monitor the wear on the tire; - it provides a wear indicator that is easier to access than the prescribed wear indicators. Indeed, if an observer uses only the wear indicators, he may have to move his vehicle to observe these wear indicators, which is not the case with the wear indicator since the latter is in an area easily accessible to the eye; the addition of a protuberance element as an indicator of wear in a transverse groove does not prevent the flow of water in said transverse groove; the addition of a protruding element as an indicator of wear in a transverse groove limits the retention of pebbles in the said transverse groove, and thus prevents the appearance of cracks which could propagate in the tire. The robustness of the tire is thus improved, and the safety of a user of the vehicle is also improved.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Tire (1) made of rubber material comprising a tread (2) and a shoulder zone (3), the tread being intended to come into contact with a road surface to form a contact area (A), said tread (2) comprising a plurality of substantially transverse grooves (23) opening into the shoulder zone (3) of the tire, characterized in that the tread (2) comprises in at least one of the transverse grooves a component (26) making protuberance with respect to a bottom (230) of said transverse groove (23) and in that the contact area (A) is delimited by an edge (Ab), the protruding element (26) is located close to this edge (Ab).
    [0002]
    2. A tire according to claim 1, characterized in that the tread comprises a longitudinal groove (22), the protrusion element (26) is located at an intersection between said longitudinal groove (22) and said transverse groove ( 23).
    [0003]
    3. A tire according to one of claims 1 to 2, characterized in that the transverse groove (23) comprises at least one chamfer (231).
    [0004]
    4. Tire (1) according to any one of claims 1 to 3, characterized in that, the tread (2) comprising at least one wear indicator (25) of height H, the protruding element ( 26) has a mean height (hl) less than the height H of the wear indicator (25) and greater than 0.5 mm.
    [0005]
    5. Pneumatic tire (1) according to any one of claims 1 to 4, characterized in that the average height (hl) of the protruding element (26) is between 0.6 and 1mm. 30
    [0006]
    6. Pneumatic tire (1) according to any one of claims 1 to 5, characterized in that the protruding element (26) has a streamlined shape.
    [0007]
    7. A tire (1) according to any one of claims 1 to 6, characterized in that the tread (2) comprises a plurality of protuberance elements (26) regularly distributed over the circumference of the tire (1).
    [0008]
    8. Pneumatic tire (1) according to any one of claims 1 to 7, characterized in that the transverse groove (23) flares towards the shoulder zone (3) of the tire (1). 10
    [0009]
    9. Tire (1) according to any one of claims 2 to 8, characterized in that the transverse groove (23) comprises a bridge (232) at the intersection between said transverse groove (23) and the longitudinal groove (22), said bridge (232) having an inclined face (233) extending from said intersection 15 towards the shoulder zone (3) of the tire (1).
    [0010]
    10. A tire (1) according to claim 9, characterized in that the bridging (232) comprises an incision (24) on the inclined face.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3010730B1|2019-10-09|Tire comprising a high-contrast marking
    WO2016050665A1|2016-04-07|Tyre comprising a tread including a projecting element in a transverse groove
    EP1264713B1|2006-03-22|Tread having ribs comprising sipes with variable inclination
    EP2780178B1|2015-06-10|Resonant-noise suppressor device for tyre
    LU83779A1|1982-05-07|SAFETY TIRE
    WO2016177973A1|2016-11-10|Tyre tread comprising a block having a plurality of cutouts
    EP1351830B1|2006-08-30|Directional running tread comprising sipes with variable inclination
    EP3094506A1|2016-11-23|Tyre comprising a particular graphic element
    EP3292005A1|2018-03-14|Tread including a block having a plurality of cut-outs
    WO2001089861A1|2001-11-29|Tyre comprising a reinforcing profiled section in at least one sidewall, and mounted tyre/rim assembly
    EP3292003B1|2020-07-01|Tyre tread comprising a block having a plurality of cutouts
    FR3027255A1|2016-04-22|DEVICE INDICATING THE WEAR OF A TIRE
    EP3030432B1|2020-07-01|Tyre comprising a particular graphic element
    EP3292004B1|2020-07-01|Tyre tread comprising a block having a plurality of cutouts
    EP3558719B1|2020-07-29|Tyre with chemically resistant reinforced sidewalls
    EP3206892B1|2018-10-03|Tyre wear monitoring device
    EP3946973A1|2022-02-09|Tyre with working layers comprising an optimised architecture and tread design
    WO2020120881A1|2020-06-18|Tread for a tyre
    EP3619058A1|2020-03-11|Pneumatic tyre with explicit wear gauge
    WO2017174928A1|2017-10-12|Tyre tread
    EP3592576A1|2020-01-15|Pneumatic tyre comprising at least one wear indicator
    FR3060459A1|2018-06-22|PNEUMATIC RESISTANT TO CHEMICAL ATTACKS
    CH702363A2|2011-06-15|Wheel for e.g. rapid car, has inscriptions affixed on external band and not on central band such that inscriptions affixed on sidewall are not in contact with another sidewall formed opposite to former sidewall, when wheel is under load
    同族专利:
    公开号 | 公开日
    WO2016050665A1|2016-04-07|
    FR3026347B1|2018-03-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20020157749A1|2001-04-25|2002-10-31|Neumann Aaron R.|Undercut tie bar for pneumatic tire|
    US20130153104A1|2011-12-14|2013-06-20|Todd A. Buxton|Snow Performance Peaks|IT201600109505A1|2016-10-28|2018-04-28|Medici Gomme S R L|SENSOR FOR ACOUSTIC SIGNALING OF TIRE WEAR AND TIRE EQUIPPED WITH SENSOR.|
    EP3444131A1|2017-08-18|2019-02-20|Sumitomo Rubber Industries, Ltd.|Tire|
    WO2020178524A2|2019-03-04|2020-09-10|Compagnie Generale Des Etablissements Michelin|Tyre comprising a tread|
    EP3888946A1|2020-03-30|2021-10-06|Bridgestone Europe NV/SA|Tyre|BR112013014269B1|2010-12-23|2021-07-06|Pirelli Tyre S.P.A.|tire|
    法律状态:
    2015-09-22| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-01| PLSC| Search report ready|Effective date: 20160401 |
    2016-09-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-28| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1459251A|FR3026347B1|2014-09-30|2014-09-30|TIRE COMPRISING A TREAD COMPRISING A PROTUBERANCE ELEMENT IN A TRANSVERSE GROOVE|
    FR1459251|2014-09-30|FR1459251A| FR3026347B1|2014-09-30|2014-09-30|TIRE COMPRISING A TREAD COMPRISING A PROTUBERANCE ELEMENT IN A TRANSVERSE GROOVE|
    PCT/EP2015/072204| WO2016050665A1|2014-09-30|2015-09-28|Tyre comprising a tread including a projecting element in a transverse groove|
    [返回顶部]