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    • 专利摘要:
    MONITORING DEVICE FOR TIRES FOR VEHICLE WHEELS, TIRE FOR VEHICLE WHEELS, AND METHOD FOR INSTALLING AN ELECTRONIC UNIT IN A TIRE FOR VEHICLE WHEELS. A vehicle tire monitoring device is described comprising: an electronic unit (20); a connecting element (30) configured to confine said electronic unit (20) on a tire (1), said connecting element (30) comprising: a first and a second base portion (31, 32), mutually separate by a separation region (33), each of said base portions (31, 32) having a respective base surface (31a, 32a) associated with an inner surface (2) of a tire (1); a housing portion (34) associated with said base portions (31, 32) defining, in cooperation with said base portions (31, 32), a cavity (35) for housing said electronic unit (20), wherein said housing portion (34) comprises at least one lateral structure (34a), configured to exert a containment action at least relative to the movements of said electronic unit (20) carried out in a main extension direction (X) of the said separation region (33) and with respect to movements of said electronic unit (20) performed in a direction orthogonal to the main extension direction (X) of said separation region (33) in which (...).
    公开号:BR112014015153B1
    申请号:R112014015153-9
    申请日:2012-12-18
    公开日:2021-02-02
    发明作者:Fabio Covolo；Federico Mancosu；Massimo Brusarosco
    申请人:Pirelli Tyre S.P.A；
    IPC主号:
    专利说明:

    DESCRIPTION OF THE INVENTION
    [0001] The present invention relates to a monitoring device for tires for vehicle wheels. The present invention also relates to a tire for vehicle wheels provided with said monitoring device.
    [0002] The present invention also relates to a method for installing an electronic unit on a tire.
    [0003] The need to monitor, in real time, the operational conditions of tires, and possibly to track the temporal evolution of parameters representative of such operation, has assumed an increasing importance due to the requirement of greater safety imposed on vehicles by customers and / or national guidelines / legislation. The parameters generally considered and / or kept under control can be, for example, temperature, pressure, distance traveled by the tire (and / or number of revolutions), load acting on the tire, as well as parameters that derive from mathematical processing that can be executed based on signals detected by sensors placed inside the tires.
    [0004] The parameters can also be used to identify particular conditions in which the tire and / or the vehicle are in, such as wear conditions, aquaplaning conditions, etc. and, more generally, for monitoring the stresses that act on the tire during its rolling (for example, on the road surface).
    [0005] The detected or calculated data can also be used to optimize the configuration of passive vehicle control systems, for example, systems adapted to check the suitability between the type of tire actually installed and the types of tire provided and considered acceptable , as well as active control systems, which use, among other parameters, those that identify the type of tire to work actively in the operation of the vehicle, in order to keep it in safe conditions (for example, ABS, ESP, etc.) .
    [0006] For this purpose, an electronic unit can be mounted inside the tire, comprising at least one sensor.
    [0007] The electronic unit can be mounted on the inner surface of the tire by means of a connection element obtained, for example, in elastomeric material.
    [0008] US 6,030,478, US 6,386,251, US 6,860,303, US 7,009,506, EP 1,948,452, US 7,908,918 and US 7,874,205 show various techniques by which an electronic unit can be associated with the inner surface of the tire. It was observed that, in systems of the known type, the electronic unit is firmly fixed on the connection element on which it is mounted, by means of a retention device such as threads, pins, caps, pressure rings and / or by means of intimate contact between the external surface of the retaining body in which the circuit system is housed, which is part of the electronic unit itself and one or more surfaces of the connecting element.
    [0009] However, it was observed that, because of the strong stresses to which the tire is subjected during use, as well as the coupling between an element made to bend during rolling (the tire) and a rigid element (the electronic unit), a Such a connection can cause a concentration of stresses and / or deformations, and consequently progressive fatigue and / or wear of the connection element, particularly when it is associated with the inner surface of the tire in a portion of the tire's crown (for example , in the equatorial plane of the tire).
    [00010] Therefore it was observed that the concentration of stresses caused by mechanical interference between the electronic unit and the cavity walls in which the said electronic unit is housed can lead to a premature rupture of the connection element, and to a situation in which the electronic unit is no longer restricted to the inner surface of the tire, but moves without any control within it, with clear negative consequences both with regard to the operation and the integrity of the electronic unit itself.
    [00011] It was realized that, by controlling the mechanical interaction between the electronic unit and the connection element, it would be possible to significantly reduce the stress concentrations in the connection element, thus guaranteeing a reliable and lasting union between the electronic unit and the tire.
    [00012] After prolonged experimentation, it was observed that leaving one or more interstices between the external surface of the electronic unit's retaining body and the surface confining a cavity predisposed in the connection element and adapted to house the electronic unit could have improved significantly the reliability and durability of the connection between the electronics unit and the tire by means of the connecting element.
    [00013] Without being restricted to any interpretive theory, it is considered that such result may depend on the fact that the interstice or interstices between the surface of the cavity in which the electronic unit is housed and the surface of the electronic unit itself allows the the connecting element is gradually modeled on the surface of the electronic unit in the event of an impact / interaction between the two surfaces, facilitating a particularly effective dissipation of the energy transmitted from the electronic unit to the connecting element, even in the case of strong deformations acting on the tire; this limits the concentration of stresses that act on the connecting element and the relative deformations and thus performs a substantial damping and distribution action over a larger surface area of the impact itself.
    [00014] According to a first aspect, the invention relates to a monitoring device for tires for vehicle wheels, comprising: - an electronic unit; - a connection element configured to confine said electronic unit on a tire, said connection element comprising: • a first and a second base portion, mutually separated by a separation region, each of said base portion having a respective base surface associated with an inner surface of a tire; • a portion of the housing associated with said base portions defining, in cooperation with said base portions, a cavity for housing said electronic unit, wherein said portion of the housing comprises at least one side structure, configured to exercise a containment action at least relative to movements of said electronic unit carried out in a main extension direction of said separation region and with respect to movements of said electronic unit carried out in a direction orthogonal to the main extension direction of said separation region, in that said cavity is confined at least by a lateral surface defined by an internal surface of said lateral structure, wherein said electronic unit comprises at least one sensor, at least one antenna and a retaining body for housing at least said sensor and said antenna, in which said retaining body has at least one side surface, in which, when said electronic unit ca is inserted in said cavity: • the lateral surface of the retaining body faces the lateral surface of the cavity, • the sizes of said cavity and said retaining body are such as to form at least one first interstice separating at least partially the lateral surface of the retaining body and the lateral surface of the cavity.
    [00015] It was observed that, in this way, the mechanical interactions between the electronic unit and the connecting element can be controlled, in a way to provide reliability and durability to the union between the electronic unit itself and the tire by means of the connection.
    [00016] According to another aspect, the invention relates to a tire for vehicle wheels, comprising an inner surface with substantially toroidal conformation, on which said monitoring device is mounted.
    [00017] In accordance with an additional aspect, the invention relates to a method for installing an electronic unit on a tire, comprising: - providing said electronic unit and said connecting element, in order to form said device of monitoring; - fixing the base surfaces of the base portions of said connecting element to an internal surface of a tire.
    [00018] According to one or more of the aspects mentioned above, the invention may comprise one or more of the preferred characteristics indicated below.
    [00019] Preferably, said cavity is confined in its lower part by a lower surface defined by the upper surfaces of said base portions.
    [00020] Preferably, said cavity is confined in its upper part by an upper surface defined by a lower surface of a top wall of said portion of the housing.
    [00021] Preferably, said electronic unit can be positioned within said cavity at least in a position in which said first interstice is peripherally continuous around said retaining body in at least one plane substantially parallel to a plane defined by said base surfaces.
    [00022] In this way, it is possible to control the interactions between the external surface of the retaining body and the surfaces that abut the cavity.
    [00023] Preferably, the first interstice can have a width between about 0.1 mm and about 1 mm. Such a width can, for example, be calculated on the lines arranged in a plane substantially parallel to the plane defined by said base surfaces, and passing through a geometric center of a profile defined by the base portions in the plane of the base surfaces.
    [00024] Preferably, said lateral structure comprises one or more expansions extending from the lateral surface of said cavity into said cavity.
    [00025] Such expansions allow to control even more the interactions between the external surface of the retaining body and the surfaces that confine the cavity, also in operational conditions of the tire.
    [00026] Preferably, said lateral structure comprises at least two of said expansions positioned on mutually opposite sides relative to a plane substantially orthogonal to the plane defined by said base surfaces and passing through a main extension direction of said separation region.
    [00027] Preferably, said retaining body comprises a respective lower surface.
    [00028] Preferably, when said electronic unit is in said specific position, the lower surface of said retaining body is in contact with the lower surface of said cavity. Preferably, said retaining body comprises a respective upper surface.
    [00029] Preferably, said electronic unit can be positioned within said cavity at least in a position in which the upper surface of said retaining body and the upper surface of said cavity are separated by a second interstice.
    [00030] In this way, the mechanical interactions between the retaining body and the top wall of the housing portion of the connection element are controlled.
    [00031] Preferably, said second interstice is such that, when the lower surface of said retaining body is in contact with the lower surface of said cavity, the upper surface of said retaining body is completely separated from the upper surface of the said cavity.
    [00032] Preferably, the second interstice can have a width between about 0.1 mm and about 1 mm. Such a width can be, for example, calculated on a line orthogonal to the plane of the base surfaces and belonging to the plane perpendicular to the main extension direction of the separation region.
    [00033] Preferably, said retaining body has at least a first expansion within which said antenna extends at least partially.
    [00034] Preferably, said retaining body has a second expansion within which said sensor extends at least partially. In the case of a pressure sensor and / or temperature sensor, the second expansion has an opening, in order to allow the sensor to carry out the necessary measurements.
    [00035] Preferably, the top wall of said housing portion is associated with said base portions in such a way that said side structure is disposed between said base portions and said top wall.
    [00036] Preferably, said top wall has at least one through-window through which said first expansion and / or said second expansion extend at least partially.
    [00037] Preferably, said electronic unit can be positioned inside said cavity in at least one position in which said first expansion and / or said second expansion are completely separated from a perimeter profile of said through-window.
    [00038] Preferably, the connecting element has a third interstice separating said first expansion and / or said second expansion of the retaining body from the perimeter profile of said through-window when said electronic unit is positioned within the cavity.
    [00039] In this way, it is prevented that possible mechanical actions derived from the stresses caused by the tire during operation are concentrated in the region of contact between the expansions of the retaining body and the profile of the through window obtained in the said top wall, thus preventing the rupture of said top wall.
    [00040] As an example, the third interstice can have a width between about 0.1 mm and about 1 mm. Such a width can, for example, be calculated on a line belonging to the plane that passes through the main extension direction of the separation region and orthogonal to the plane of the base surfaces.
    [00041] Preferably, in a section considered in a foreground orthogonal to the main extension direction of said separation region, a connection region between the lateral surface and the lower surface that confine said cavity has a curvilinear profile different from that of a profile curvilinear defined in a connection region between the lateral surface and the lower surface of said retaining body.
    [00042] Preferably, in a section considered along a foreground orthogonal to the main extension direction of said separation region, a connection region between the lateral surface and the upper surface that adjoins said cavity has a different curvilinear profile than one curvilinear profile defined in a connection region between the lateral surface and an upper surface of said retaining body.
    [00043] Preferably, in a section considered along a second plane orthogonal to the plane defined by said base surfaces and parallel to the main extension direction of the separation region, a connection region between the lateral surface and the lower surface that confine the said cavity has a curvilinear profile different from a curvilinear profile defined in a connection region between the lateral surface and a lower surface of said retaining body.
    [00044] Preferably, in a section considered along a second plane orthogonal to the plane defined by said base surfaces and parallel to the main extension direction of said separation region, a connection region between the lateral surface and the upper surface that abut said cavity has a curvilinear profile different from a curvilinear profile defined in a connection region between the lateral surface and an upper surface of said retaining body.
    [00045] Preferably, in a section considered along a third plane that passes through an axis orthogonal to the plane defined by said base surfaces and that passes through the center of a profile defined by said base portions in the plane identified by said surfaces base: a connecting region between the lateral surface and the lower surface that adjoins said cavity has a curvilinear profile different from a curvilinear profile defined in a connecting region between the lateral surface and a lower surface of said retaining body.
    [00046] Preferably, in a section considered along a third plane that passes through an axis orthogonal to the plane defined by said base surfaces and that passes through the center of a profile defined by said base portions in the plane identified by said surfaces of base a connection region between the lateral surface and the upper surface of said cavity has a curvilinear profile different from a curvilinear profile defined in a connection region between the lateral surface and an upper surface of said retaining body.
    [00047] Preferably, in a section considered along a fourth plane substantially parallel to the plane defined by said base surfaces, said retaining body has a perimeter profile comprising two substantially rectilinear opposite segments connected by a pair of curvilinear connections with a profile different from the curvilinear profile shown by the portion of the perimeter profile of said portion of the housing facing said curvilinear connections.
    [00048] In this way, when each of the said profiles comes into contact with the respective profile facing him, the stresses are better distributed on the respective surfaces, optimizing the absorption of the stresses to which the monitoring device is subjected during the rolling of the tire.
    [00049] Preferably, said retaining body of said electronic unit does not have cylindrical symmetry relative to any axis.
    [00050] Preferably, said internal surface of said portion of the housing adjoining said cavity has no cylindrical symmetry relative to any axis.
    [00051] Preferably, the main extension direction of said region of separation between the base portions of said connecting element is arranged substantially in a radial plane of said tire.
    [00052] Preferably, said inner surface of said tire is an inner lining of said tire.
    [00053] Additional features and advantages will become clearer from the description of a preferred and not exclusive modality of the invention.
    [00054] This description is provided below with reference to the attached figures, also being provided merely as a non-limiting example, in which: - Figure 1 shows a tire for vehicle wheels in which a monitoring device according to invention is installed; - Figure 2 schematically shows a perspective view of a monitoring device according to the invention; - Figure 2a schematically shows a perspective view in section of the device of figure 2, in which some parts have been eliminated in order to better illustrate other parts; Figure 3 schematically shows a plan view of a first embodiment of a monitoring device according to the invention; - Figures 3a-3c respectively show sectional views of the device of figure 2 taken along the lines Pl-Pl, P2-P2, P3-P3 shown in figure 3, with the electronic unit in side view in figures 3a and 3c; - Figure 4 schematically shows a perspective view of a modality of an electronic unit used in a monitoring device according to the invention; - Figure 5 shows a block diagram of a modality of an electronic unit used in a monitoring device according to the invention; Figure 6 schematically shows a sectional view of a second embodiment of a monitoring device according to the invention; Figure 6a schematically shows a sectional view of the device of figure 6 taken along line P4-P4 shown in figure 6; Figure 7 shows a plan view of a part of the connecting element of the device of Figure 6; - Figures 7a, 7b show respectively sectional views of the connection element of figure 7 considered along the lines H-H and L-L shown in figure 7.
    [00055] With reference to the attached figures, a tire for vehicle wheels provided with a monitoring device according to the present invention is indicated as a whole by 1. The monitoring device is indicated with reference number 10.
    [00056] Tire 1, per se known, is not described here in detail.
    [00057] Tire 1 (figure 1) comprises an inner surface 2, preferably comprising or constituted by the so-called "inner lining".
    [00058] The monitoring device 10 is mounted on such an internal surface 2.
    [00059] The monitoring device 10 comprises an electronic unit 20 (figures 4-5).
    [00060] Preferably, the electronic unit 20 comprises at least one sensor 21 and at least one antenna 22.
    [00061] For example, said sensor 21 is a pressure and / or temperature sensor, configured to detect the pressure and / or temperature inside the tire 1.
    [00062] In an additional modality, sensor 21 can be an accelerometer-type sensor, configured to detect mechanical stresses to which tire 1 is subjected. Additionally, or alternatively, sensor 21 can be an inertial type sensor.
    [00063] In one modality, the sensor 21 can be constituted, at least in part, by a self-controlled system ("energy collector") of the electronic unit, from which it is possible to obtain both the supply of electrical energy for the electronic unit itself and signals , for example, analog signals, representative of the mechanical actions transmitted by the tire.
    [00064] In general, sensor 21 can also be used to determine the number of revolutions of the tire and / or the load acting on the tire and / or the angular speed and / or parameters representative of the tire's operating conditions (for example, friction, wear and / or aquaplaning conditions).
    [00065] The antenna 22 has at least the task of transmitting the data detected by the sensor 21 to the devices on board the vehicle in which the tire 1 is mounted.
    [00066] Preferably, the electronic unit 20 also comprises a processing circuit 23, associated with the sensor 21 and the antenna 22.
    [00067] The processing circuit 23 may have the task of managing (for example, acquiring and / or filtering and / or processing) the signals detected by the sensor 21, with the purpose of obtaining the data to be stored and / or transmitted by middle of the antenna 22.
    [00068] Preferably, the electronic unit 20 also comprises an energy supply system 24, predisposed to supply electrical energy to the electronic unit 20.
    [00069] Preferably, the power supply system 24 comprises at least one battery. In addition, or alternatively to such a battery, the energy supply system 24 may comprise a device capable of transforming the mechanical energy transmitted to the device itself during the rolling of the tire into electrical energy (energy collector).
    [00070] Antenna 22 can also receive signals from devices on board the vehicle and / or from systems placed outside the vehicle itself. For example, the electronic unit 20 may comprise two antennas, one of which is predisposed to transmit (for example, at a frequency of 433 MHz) the processed and / or stored data, and another one predisposed to receive (for example, to a 125 kHz frequency) signals from systems placed on board the vehicle and / or outside the vehicle itself (for example, wake-up signals for the monitoring device and / or signals containing preconfiguration data for the monitoring device and / or signals containing programming instructions for the monitoring device).
    [00071] The electronic unit 20 may also comprise a memory 25, in which data relating to the operation of the tire and / or configuration / assembly data typically referred to as the characteristics of the tire itself and / or identification data of the monitoring device 10 and / or tire 1 are stored. For example, in memory 25, data representative of the distance traveled by the tire may have been stored, preferably determined as a function of the total number of revolutions made by the tire itself. In memory 25, it is also possible to store one or more procedures for processing the signal detected by at least one sensor 21, and / or algorithms to calculate predetermined parameters starting from signals detected by at least one sensor 21 (or in pre-processed signals ) and / or signal filtering logic.
    [00072] Preferably, the electronic unit 20 comprises a retaining body 26, preferably rigid, in which the different elements (sensor, antenna, power supply system, etc.) are housed.
    [00073] The retaining body 26 can be obtained according to techniques that are very well known, for example, embedding the circuit system of the electronic unit 20 in a resin cast that stiffens after its solidification, or by means of molding .
    [00074] Preferably, the electronic unit 20 and, in particular, the retaining body 26, do not have cylindrical symmetry around any axis.
    [00075] Preferably, the retaining body 26 has at least one first expansion 26a within which the antenna (or at least one of the antennas) 22 extends at least partially.
    [00076] Preferably, the retaining body 26 has a second expansion 26b within which the sensor 21 extends at least partially. In the case of a pressure sensor and / or temperature sensor, the second expansion 26b has an opening (not shown in figure 4), in order to allow the sensor to make the necessary measurements.
    [00077] The retaining body 26 has at least one side surface 261.
    [00078] The retaining body 26 also has a bottom surface 262 and a top surface 263.
    [00079] The monitoring device 10 also comprises a connection element 30.
    [00080] The connecting element 30 keeps the electronic unit 20 restricted on the tire 1 and, in particular, on the inner surface 2 thereof.
    [00081] Preferably, the connecting element 30 is of one piece construction.
    [00082] Preferably, the connecting element 30 is made of elastomeric material. Such an elastomeric material can, for example, comprise a thermoplastic elastomer. In a preferred embodiment, the elastomeric material comprises a halogenated butyl rubber and a synthetic rubber (for example, polybutadiene, or polyisoprene).
    [00083] Examples of elastomeric materials that can be used are described in the published international patent application under number WO 2010/043264 in the name of the same applicant.
    [00084] The connecting element 30 (figures 2-3, 3a-3c, 6-6a, 7, 7a-7b) comprises a first and a second base portion 31, 32. The base portion 31, 32 are separated by a separation region 33. The separation region 33 has a major extension direction X.
    [00085] Each of the base portions 31, 32 has a respective base surface 31a, 32a. The base surfaces 31a, 32a are associated with the inner surface 2 of the tire 1. The connecting element 30 also comprises a housing portion 34 associated with the base portions 31, 32 defining, in cooperation with such base portions 31, 32, a cavity 35 for housing the electronic unit 20.
    [00086] The housing portion 34 conveniently comprises a side structure 34a, configured to exert a containment action at least relative to movements of the electronic unit 20 carried out in a direction of principal extension X of the separation region 33, and with respect to movements of the electronic unit 20 carried out in a direction orthogonal to the main extension direction X of said separation region 33.
    [00087] In other words, the side structure 34a prevents the extraction of the electronic unit 20 from the cavity 35 at least in the direction of main extension X of the separation region 33, and in the direction perpendicular thereto. Preferably, the side structure 34a prevents extraction of the electronic unit 20 from the cavity 35 in any direction contained in a plane substantially parallel to a plane formed by the base surfaces 31a, 32a.
    [00088] Preferably, as shown schematically in figures 2 and 3, the side containment structure 34a comprises a first and a second side wall 36, 37.
    [00089] Preferably, each first and second side wall 36, 37 is substantially C-shaped. Cavity 35 is bounded by at least one side surface 351 defined by an inner surface 340 of side structure 34.
    [00090] The cavity 35 is also confined at the bottom by a lower surface 352 defined by the upper surfaces of the base portions 31, 32 (figure 7b).
    [00091] The cavity 35 is also bounded by a top surface 353 defined by a bottom surface of a part of the top wall 34b of the housing portion 34 and which will be better described below.
    [00092] Preferably, the internal surface of the housing portion 34 that abuts the cavity 35 does not show cylindrical symmetry relative to any axis.
    [00093] The electronics unit 20 and the connection element 30 can be obtained separately.
    [00094] When the electronic unit 20 has to be installed on the tire 1, the electronic unit 20 itself is inserted in the cavity 35 and, subsequently, the base surfaces 31a, 32a of the base portions 31, 32 are fixed on the internal surface of the tire 1, for example, by joining. This typically occurs after cleaning the inner surface of the tire 1, for example, by means of a laser.
    [00095] Preferably, the monitoring device is attached to the tire 1 in such a way that the main extension direction X of the separation region 33 is substantially arranged in a radial plane of the tire 1.
    [00096] When the electronics unit 20 is housed in the cavity 35, the side surface 261 of the retaining body 26 faces the side surface 351 of the cavity 35, the lower surface 262 of the retaining body 26 faces the lower surface 352 of the cavity 35, the top surface 263 of the retaining body 26 faces the top surface 353 of the cavity 35.
    [00097] Advantageously, the sizes of the cavity 35 and the retaining body 26 are such as to form at least a first interstice 100 at least partially separating the side surface 261 from the retaining body 26 and the side surface 351 from the cavity 35.
    [00098] Preferably, the electronic unit 20 can be positioned within the cavity 35 at least in a position in which the aforementioned first interstice 100 is peripherally continuous around the retaining body 26 in at least one plane substantially parallel to a plane defined by base surfaces 31a, 32a.
    [00099] As an example, the first interstice 100 can have a width, calculated on the lines arranged in a plane substantially parallel to the plane defined by said base surfaces 31a, 32a, and passing through a geometric center of a PR profile defined by the portions base 31, 32 in the plane of the base surfaces 31a, 32a, between about 0.1 mm and about 1 mm.
    [000100] Preferably, the side structure 34 comprises one or more expansions 341 extending from the side surface 351 of the cavity 35 at least into the cavity 35 itself.
    [000101] Expansions 341 are adapted to keep the electronic unit 20 in a determined position inside the cavity 35, when the electronic unit 20 is positioned inside the cavity 35 and the device 10 is maintained in conditions of substantial immobility, that is, in the absence of external mechanical stresses (for example, stresses transmitted due to the tire rolling).
    [000102] In this way, a double advantage is obtained: the mechanical interaction between the retaining body 26 and the surfaces adjoining the cavity 35 is extremely reduced, and the movements of the electronic unit 20 inside the cavity 35 during the tire rolling 1 are extremely controlled.
    [000103] Preferably, there are at least two expansions 341, positioned on mutually opposite sides relative to a plane substantially orthogonal to the plane defined by the base surfaces 31a, 32a and passing through the main extension direction X of the separation region 33.
    [000104] In a preferred embodiment, illustrated in figures 7a, 7b, the side structure 34 comprises a total of six expansions 341, divided into two rows of three expansions each, arranged on opposite sides with respect to the aforementioned plane perpendicular to the base surfaces 31a, 32a, and passing through the main extension X direction of the separation region.
    [000105] Preferably, when the electronic unit 20 is in the specific position, the lower surface 262 of the retaining body 26 is in contact with the lower surface 352 of the cavity 35.
    [000106] Preferably, the electronic unit 20 can be positioned inside the cavity 35 at least in a position in which the top surface 263 of the retaining body 26 and the top surface 353 of the cavity 35 are separated by a second interstice 200.
    [000107] Preferably, the second interstice 200 is such that when the bottom surface 262 of the retaining body 26 is in contact with the bottom surface 352 of the cavity 35, the top surface 263 of the retaining body 26 is completely separated of the top surface 353 of said cavity 35.
    [000108] Preferably, the second interstice 200 may have a width, calculated in a line orthogonal to the plane of the base surfaces 31a, 32a and belonging to the plane perpendicular to the main extension direction X of the separation region 33, between about 0, 1 mm and about 1 mm.
    [000109] As previously mentioned, the housing portion 34 comprises a top wall 34a.
    [000110] The side structure 34b is disposed between the top wall 34a and the base portions 31,32.
    [000111] Preferably, the top wall 34b has at least one through-window W through which the first expansion 26a and / or the second expansion 26b of the retaining body 26 extend at least partially.
    [000112] In this way, the antenna 22 and / or the sensor 21 can operate correctly without the structure of the connecting element 30 and, in particular, the top wall 34b interfering from an electromagnetic and / or mechanical point of view.
    [000113] Preferably, the electronic unit 20 can be positioned inside the cavity 35 in at least one position in which the first expansion 26a and / or the second expansion 26b are completely separated from a perimeter profile W1 of the through window W. In this way, the probability that, even with respect to substantially uncontrollable movements of the electronic unit 20 inside the cavity 35 during the rolling of the tire 1, considerably reduces the interaction between the first and / or second expansions 26a, 26b and the perimeter profile W1 of the Through-window W is of such an intensity as to cause tearing and / or rupture of the top wall 34b. When the electronic unit 20 is arranged within the cavity 35, a third interstitial 300 is defined between the first and / or second expansions 26a, 26b of the retaining body 26 and the perimeter profile W1 of the through window W.
    [000114] As an example, the third interstice 300 may have, in a line belonging to the plane that passes through the main extension direction X of the separation region 33 and orthogonal to the plane of the base surfaces 31a, 32a, a width between about 0.1 mm and about 1 mm.
    [000115] Preferably, the retaining body 26, ignoring the aforementioned expansions 26a, 26b, has a substantially box-like, for example, substantially para-pediatric shape. Preferably, edges and vertices of the retaining body 26 are suitably rounded in a way to minimize damage to the structure of the connecting element 30 when the electronic unit 20 comes into contact with the side structure 34a, the top wall 34b and / or with the basic portions 31,32.
    [000116] Preferably, the cavity 35 is approximately modeled with respect to the retaining body 26, in order to adequately house the electronic unit 20, maintaining small general dimensions.
    [000117] Preferably, however, there are significant differences between the external profiles of the retaining body and the profiles defined by the surfaces that abut the cavity 35. This, again, with the purpose of minimizing the consequences of the mechanical interactions that are developed within the cavity 35, between the electronics unit 20 and the connecting element 20, when rolling the tire 1.
    [000118] Preferably, in a section considered along a foreground PI orthogonal to the main extension direction X of the separation region 33, a connection region RI is defined between the lateral surface 351 and the lower surface 352 that confine the cavity 35.
    [000119] Such an RI connection region has a different curvilinear profile than a defined curvilinear profile, in the same section, in an RT connection region between the lateral surface 261 and the lower surface 262 of the retaining body 26. In other words, the two profiles of the connection regions RI and RT (shown schematically in figure 3a) are not joined together.
    [000120] Consequently, if the connection regions RI and RT come into contact with each other, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will more efficiently resist the action exerted by the electronic unit 20.
    [000121] Preferably, in a section considered along a first PI plane orthogonal to the main extension direction X of the separation region 33, a connection region R2 is defined between the side surface 351 and the top surface 353 that confine the cavity 35.
    [000122] Such a connection region R2 has a different curvilinear profile than a defined curvilinear profile, in the same section, in a connection region R2 'between the side surface 261 and a top surface 263 of the retaining body 26. In other words , the two profiles of the connection regions R2 and R2 '(shown schematically in figure 3a) are not joined together.
    [000123] Consequently, if the connection regions R2 and R2 'come into mutual contact, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will more effectively resist the action exerted by the electronic unit 20.
    [000124] Preferably, in a section considered along a second plane P2 orthogonal to the plane defined by the base surfaces 31a, 32a and parallel to the main extension direction X of the separation region 33, a connection region R3 is defined between the side surface 351 and bottom surface 352 bordering cavity 35. Preferably, such a connection region R3 has a different curvilinear profile than a defined curvilinear profile, in the same section, in a connection region R3 'between the side surface 261 and the lower surface 262 of the retaining body 26. In other words, the two profiles of the connection regions R3 and R3 '(shown schematically in figure 3c) are not joined together.
    [000125] Consequently, if the connection regions R3 and R3 'come into contact with each other, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will more efficiently resist the action exerted by the electronic unit 20.
    [000126] Preferably, in a section considered along a second plane P2 orthogonal to the plane defined by the base surfaces 31a, 32a and parallel to the main extension direction X of the separation region 33, a connection region R4 is defined between the side surface 351 and top surface 353 that abut cavity 35. Such a connection region R4 has a different curvilinear profile than a defined curvilinear profile, in the same section, in a connection region R4 'between the lateral surface 261 and the surface top section 263 of the retaining body 26. In other words, the two profiles of the connection regions R4 and R4 '(shown schematically in figure 3c) are not joined together.
    [000127] Consequently, if the connection regions R4 and R4 'come into contact with each other, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will resist with greater reflectivity the action exerted by the electronic unit 20.
    [000128] Preferably, in a section considered along a third plane P3 that passes through an axis orthogonal to the plane defined by the base surfaces 31a, 32a and that passes through the center of a PR profile defined by the base portions 31, 32 in the plane identified by the base surfaces 31a, 32a, a connection region R5 is defined between the lateral surface 351 and the lower surface 352 that abut the cavity 35.
    [000129] Such a connection region R5 has a different curvilinear profile than a curvilinear profile defined in a connection region R5 'between the side surface 261 and the bottom surface 262 of the retaining body 26. In other words, the two profiles of the regions connection points R5 and R5 '(shown schematically in figure 3b) are not joined together.
    [000130] Consequently, if the connection regions R5 and R5 'come into contact with each other, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will more efficiently resist the action exerted by the electronic unit 20.
    [000131] Preferably, in a section considered along a third plane P3 that passes through an axis orthogonal to the plane defined by the base surfaces 31a, 32a and that passes through the center of a PR profile defined by the base portions 31, 32 in the plane identified by said base surfaces 31a, 32a, a connection region R6 is defined between the side surface 351 and the top surface 353 of the cavity 35. Such connection region R6 has a curvilinear profile different from a curvilinear profile defined in a connection region R6 'between the side surface 261 and the top surface 263 of the retaining body 26. In other words, the two profiles of the connection regions R6 and R6' (shown schematically in figure 3a) are not joined together.
    [000132] Consequently, if the connection regions R6 and R6 'come into contact with each other, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will more effectively resist the action exerted by the electronic unit 20.
    [000133] Preferably, in a section considered along a fourth plane P4 substantially parallel to the plane defined by the base surfaces 31a, 32a, the retaining body 26 has a perimeter profile comprising two substantially straight opposite segments 26T1, 26T2 connected by a pair of curvilinear connections 26R1, 26R2.
    [000134] Preferably, such curvilinear connections 26R1, 26R2 have a different profile from the curvilinear profile shown by the perimeter profile portion PRP1, PRP2 of the housing portion 34 facing such curvilinear connections 26R1, 26R2 (figure 6a). In other words, the curvilinear connections 26R1, 26R2 and the portions of the perimeter profile PRP1, PRP2 are not joined together.
    [000135] Consequently, if the curvilinear connections 26R1 and 26R2 come into contact with the portions of the perimeter profile PRP1 and PRP2, there will be no complete adhesion between the two surfaces, and the structure of the connection element 30 will resist with greater efficiency the action exerted by the electronic unit 20.
    权利要求:
    Claims (15)
    [0001]
    1. Monitoring device for tires for vehicle wheels, characterized by the fact that it comprises: - an electronic unit (20); - a connecting element (30) configured to confine said electronic unit (20) on a tire (1), said connecting element (30) comprising: - a first and a second base portion (31, 32), mutually separated by a separation region (33), each of said base portions (31, 32) having a respective base surface (31a, 32a) associated with an inner surface (2) of a tire (1); - a portion of the housing (34) associated with said base portions (31, 32) defining, in cooperation with said base portions (31, 32), a cavity (35) for housing said electronic unit (20) , wherein said housing portion (34) comprises at least one side structure (34a), configured to exert a containment action, wherein said cavity (35) is confined at least by a side surface (351) defined by an internal surface (340) of said side structure (34), wherein said electronic unit (20) comprises at least one sensor (21), at least one antenna (22) and a retaining body (26) for housing at least minus said sensor (21) and antenna (22), wherein said holding body (26) has at least one side surface (261), where, when said electronic unit (20) is inserted into said cavity ( 35): - the side surface (261) of the retaining body (26) faces the side surface (351) of the cavity (35), - the sizes of said cavity (35) and said retaining body (26) are such as to form at least a first interstice (100) at least partially separating the lateral surface (261) from the retaining body (26) and the lateral surface (351) cavity (35), in which said lateral structure (34a) is configured to exert a containment action at least relative to movements of said electronic unit (20) carried out in a main extension direction (X) of said separation region ( 33) and with respect to movements of said electronic unit (20) performed in a direction orthogonal to the main extension direction (X) of said separation region (33).
    [0002]
    Device according to claim 1, characterized in that said cavity (35) is confined in its lower part by a lower surface (352) defined by the top surfaces of said base portions (31, 32).
    [0003]
    Device according to claim 1 or 2, characterized in that said cavity (35) is confined in its upper part by a top surface (353) defined by a bottom surface of a top wall (34b) said portion of the housing (34).
    [0004]
    Device according to any one of claims 1 to 3, characterized in that said electronic unit (20) can be positioned inside said cavity (35) at least in a position in which said first interstice (100) it is peripherally continuous around said retaining body (26) in at least one plane substantially parallel to a plane defined by said base surfaces (31a, 32a), and wherein said first interstice (100) has a width between 0 , 1 mm and 1 mm.
    [0005]
    Device according to any one of claims 1 to 4, characterized in that said lateral structure (34) additionally comprises one or more expansions (341) extending from the lateral surface (351) of said cavity (35) even within said cavity (35).
    [0006]
    Device according to any one of claims 1 to 5, characterized in that said retaining body (26) comprises a respective top surface (263), and in which said electronic unit (20) can be positioned within said cavity (35) at least in a position in which the top surface (263) of said retaining body (26) and the top surface (353) of said cavity (35) are separated by a second interstice ( 200).
    [0007]
    Device according to claim 6, characterized in that said second interstice (200) is such that, when a lower surface (262) of said retaining body (26) is in contact with the lower surface (352 ) of said cavity (35), the top surface (263) of said retaining body (26) is completely separated from the top surface (353) of said cavity (35).
    [0008]
    Device according to any one of claims 1 to 7, characterized in that said retaining body (26) has at least one first expansion (26a) within which said antenna (22) extends at least partially and / or a second expansion (26b) within which said sensor (21) extends at least partially, wherein the top wall (34b) of said housing portion (34) is associated with said portions of base (31, 32) in such a way that said side structure (34a) is arranged between said base portions (31, 32) and said top wall (34b), wherein said top wall (34b) it has at least one bypass window (W) through which said first expansion (26a) and / or said second expansion (26b) extend at least partially, in which said electronic unit (20) can be positioned inside the said cavity (35) in at least one position in which said first expansion (26a) and / or said second expansion (26b) are completely s eparated from a perimeter profile (W1) of said through-window (W), wherein said connecting element (30) has a third interstice (300) separating said first expansion (26a) and / or said second expansion (26b ) of the perimeter profile (W1) of said through-window (W) when said electronic unit (20) is positioned in said cavity (35), in which said third interstice (300) has a width between 0.1 mm and 1 mm.
    [0009]
    Device according to any one of claims 1 to 8, characterized by the fact that, in a section considered along a first plane (P1) orthogonal to the main extension direction (X) of said separation region (33) : - a connection region (R1) between the lateral surface (351) and the lower surface (352) that adjoin said cavity (35) has a different curvilinear profile than a curvilinear profile defined in a connection region (R1 ') between the lateral surface (261) and a lower surface (262) of said retaining body (26), and / or - a connection region (R2) between the lateral surface (351) and the top surface (353) which abut said cavity (35) has a curvilinear profile different from a curvilinear profile defined in a connection region (R2 ') between the lateral surface (261) and a top surface (263) of said retaining body (26).
    [0010]
    10. Device according to any one of claims 1 to 9, characterized by the fact that, in a section considered along a second plane (P2) orthogonal to the plane defined by said base surfaces (31a, 32a) and parallel to the main extension direction (X) of said separation region (33): - a connection region (R3) between the lateral surface (351) and the lower surface (352) that adjoin said cavity (35) has a curvilinear profile different from a curvilinear profile defined in a connection region (R3 ') between the lateral surface (261) and a lower surface (262) of said retaining body (26), and / or - a connection region (R4) between the side surface (351) and the top surface (353) adjoining said cavity (35) have a curvilinear profile different from a curvilinear profile defined in a connection region (R4 ') between the lateral surface (261) and a top surface (263) of said retaining body (26).
    [0011]
    11. Device according to any one of claims 1 to 10, characterized by the fact that, in a section considered along a third plane (P3) that passes through an axis orthogonal to the plane defined by said base surfaces (31a, 32a) and which passes through the center of a profile (PR) defined by said base portions (31, 32) in the plane identified by said base surfaces (31a, 32a): - a connection region (R5) between the lateral surface (351) and the lower surface (352) adjoining said cavity (35) has a curvilinear profile different from a curvilinear profile defined in a connection region (R5 ') between the lateral surface (261) and a lower surface (262 ) of said retaining body (26), and / or - a connection region (R6) between the side surface (351) and the top surface (353) of said cavity (35) has a curvilinear profile different from a profile curvilinear defined in a connection region (R6 ') between the lateral surface (261) and a surface of top (263) of said retaining body (26).
    [0012]
    12. Device according to any one of claims 1 to 11, characterized by the fact that, in a section considered along a fourth plane (P4) substantially parallel to the plane defined by said base surfaces (31a, 32a): - said retaining body (26) has a perimeter profile comprising two oppositely substantially straight segments (26T1, 26T2) connected by a pair of curvilinear connections (26R1, 26R2) with a profile different from the curvilinear profile shown by the portion of the perimeter profile (PRP1 , PRP2) of said housing portion (34) facing said curvilinear connections (26R1, 26R2).
    [0013]
    Device according to any one of claims 1 to 12, characterized in that said retaining body (26) does not have cylindrical symmetry relative to any axis, and / or in which said internal surface of said lateral structure ( 34) adjoining said cavity (35) does not show cylindrical symmetry relative to any axis.
    [0014]
    14. Tire for vehicle wheels, characterized by the fact that it comprises: - an internal surface (2) with substantially toroidal conformation; - a monitoring device (1), as defined in any one of claims 1 to 13, mounted on said internal surface (2).
    [0015]
    15. Method for installing an electronic unit on a vehicle wheel tire having a monitoring device as defined in any of claims 1 to 13, characterized by the fact that said method comprises: - providing an electronic unit (20) and a connecting element (30) adapted to form a monitoring device (10), as defined in any one of claims 1 to 13; - fixing the base surfaces (31a, 32a) of the base portions (31, 32) of said connecting element (30) to an internal surface (2) of a tire (1).
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    同族专利:
    公开号 | 公开日
    ITMI20112427A1|2013-06-30|
    RU2569232C1|2015-11-20|
    CN104024005A|2014-09-03|
    CN104024005B|2016-10-19|
    BR112014015153A2|2017-06-13|
    WO2013098712A1|2013-07-04|
    US20140352420A1|2014-12-04|
    EP2797761A1|2014-11-05|
    US9096103B2|2015-08-04|
    EP2797761B1|2015-10-28|
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    法律状态:
    2019-05-14| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2020-04-07| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-12-22| B09A| Decision: intention to grant|
    2021-02-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 18/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    ITMI2011A002427|2011-12-29|
    IT002427A|ITMI20112427A1|2011-12-29|2011-12-29|MONITORING DEVICE FOR TIRES FOR WHEELS OF VEHICLES, TIRES FOR WHEELS OF VEHICLES PROVIDED WITH SUCH A MONITORING DEVICE, AND A METHOD FOR INSTALLING AN ELECTRONIC UNIT IN THAT TIRE|
    US201261594071P| true| 2012-02-02|2012-02-02|
    US61/594,071|2012-02-02|
    PCT/IB2012/057411|WO2013098712A1|2011-12-29|2012-12-18|Monitoring device for tyres for vehicle wheels, tyre for vehicle wheels provided with said monitoring device, and method for installing an electronic unit in said tyre|
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