• 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:
    NON-PNEUMATIC WHEEL WITH REDUCED SIDE RIGIDITY. Structurally supported non-pneumatic tension-based wheel with reduced lateral stiffness having a compliant tread and a plurality of web spokes to support the stressed load extending transversely through and into a compliant tread for attachment to a hub . The web spokes have an increasing inclination angle and decreasing width when they extend from the compliant tread towards the hub reducing the lateral stiffness of the wheel, thereby reducing the steering force return to the steering mechanism.
    公开号:BR112016008527B1
    申请号:R112016008527-2
    申请日:2014-10-20
    公开日:2021-02-02
    发明作者:Steve M. Cron；Timothy Brett Rhyne
    申请人:Compagnie Generale Des Etablissements Michelin；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION
    [0001] The subject of the present disclosure generally relates to structurally supported eroded tires, not tension-based pneumatics. More particularly, the invention relates to a tension-based non-pneumatic wheel having reduced lateral stiffness that supports a load with its structural components and has performance capabilities similar to a pneumatic tire, to serve as a spare for a pneumatic tire.
    [0002] The core spokes of a non-pneumatic tire based on tension have a stiffness of high effectiveness in tension and a stiffness of low effectiveness in compression. The low compression stiffness allows the web rays fixed to the portion in contact with the floor of the compliant band to accommodate deformation of the portion in contact with the floor of the compliant band without transmitting significant vertical load. The radii of the web are relatively thin compared to its length and will typically bend in compression. The lack of support of substantial compressive load by the rays of the soul in the contact region facilitates the formation of the contact patch and absorption of obstacles. In addition, as most of the load supported and road shock must travel around the compliant band and through the tensioned web spokes, the tension-based non-pneumatic compliant wheel has improved comfort and shock absorption compared to wheels pneumatics. An example of a non-pneumatic wheel is described in US Patent 7,013,939 incorporated in its entirety in this document by reference.
    [0003] To facilitate the bending of the spokes of the web of the portion in contact with the ground of the tread, the spokes can be curved. Alternatively, the spokes of the web may be formed during molding to have a predisposition to bend in a particular direction. Another alternative is to provide a connection between the cube and the rays of the web or between the compliant band and the webs of the web that acts on tension but allows relative movement of the web of the web in compression.
    [0004] A structurally supported non-pneumatic wheel incorporating a compliant band and a plurality of load-bearing structural components has a lateral stiffness inherent in the design of the wheel. According to certain circumstances it is desirable to adjust the lateral stiffness of the wheel to a desired lateral stiffness for a given application. For example, when a non-pneumatic wheel with relatively high lateral stiffness is used off-road, for example, in an All Terrain Vehicle (AVT), it creates a high force return to the steering mechanism. SUMMARY OF THE INVENTION
    [0005] According to one modality, a structurally supported non-pneumatic wheel based on tension with reduced lateral stiffness is achieved by tapering and twisting each web radius, reducing the width of each web radius and increasing the magnitude of the angle of inclination, since web radius extends from the compliant tread to the inner wheel portion of the wheel.
    [0006] A structurally supported non-pneumatic tension-based wheel comprises a hub; a compliant load support band arranged radially outwardly and concentrically with the hub; and a plurality of tension-based web elements, otherwise referred to as web spokes, extending between the cube and the compliant band, where each web ray has a tapered lateral width which is greater close to the compliant band. than near the cube and a changing angle of inclination which is greater near the cube than near the compliant band. In general, the compliant band comprises a membrane or reinforcement layer embedded in the band. The reinforcement layer comprises strands aligned in the circumferential direction embedded in an elastomeric layer. According to this modality, the decreasing tapered width and the increasing inclination angle of the plurality of souls when they extend radially into the compliant band decrease the lateral stiffness of the wheel, reducing the force return to the vehicle's steering mechanism, while maintaining the stability of the wheel.
    [0007] Another structurally supported wheel modality comprises: a compliant band; a plurality of web rays extending transversely through and radially into said compliant band; the plurality of soul rays fixing to a cube, each of the plurality of soul rays having a radius width extending in an axial direction, a radius length extending in a radial direction, a radius thickness perpendicular to the other dimensions, a tilt angle measured as the angle each of the plurality of web spokes makes compared to the transverse axis of the wheel at a given position along the radius length, the radius width decreasing and the magnitude of the tilt angle increasing when measured in a radially outward position to a radially inward position.
    [0008] Another embodiment of the invention could include structurally supported wheel comprising: a compliant band; a plurality of twisted web rays extending transversely through and radially into the compliant band; the plurality of soul rays fixing to a cube, each of the plurality of soul rays having a radius width extending in an axial direction, a radius length extending in a radial direction, a radius thickness perpendicular to the other dimensions, a tilt angle measured as the angle each of the plurality of web spokes makes compared to the transverse axis of the wheel at a given position along said radius length, the radius width decreasing and the magnitude of the tilt angle increasing when measured in a radially outward position to a radially inward position.
    [0009] In another embodiment, the angle of inclination of the rays of the soul approximating the compliant band is 0.5 degrees, although the angle of inclination of the rays of the soul proximal to the cube is greater than 0.5 degrees.
    [0010] In another embodiment, the angle of inclination of the rays of the soul near the compliant band is 4 degrees, although the angle of inclination of the rays of the soul proximal to the cube is greater than 12 degrees.
    [0011] These and other characteristics, aspects and advantages of the present invention will be better understood with reference to the description below and the attached claims. The accompanying drawings that are incorporated and constitute a part of this specification illustrate modalities of the invention and, together with the description, serve to explain the principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
    [0012] A complete and enabling disclosure of the present invention, including the best mode of the same, directed to those skilled in the art, is established in the specification which makes reference to the attached figures, in which:
    [0013] Figure 1 is a perspective view of the structurally supported non-pneumatic wheel based on tension with reduced lateral stiffness.
    [0014] Figure 2 is a close-up perspective view of the wheel.
    [0015] Figure 3 is a side view in the equatorial plane of the wheel.
    [0016] Figure 4 is a partial side view close up in the equatorial plane of the wheel view showing two adjacent web spokes.
    [0017] Figure 5 is a sectional view of the outer radial end of the core rays taken on line 5A - 5A of Figure 4.
    [0018] Figure 6 is a sectional view of the intermediate portion of the ray of rays taken on line 6 - 6 of Figure 4.
    [0019] Figure 7 is a sectional view of the inner radial end of the core radii taken on line 7 - 7 of Figure 4.
    [0020] Figure 8 is a sectional view of the wheel taken along the equatorial plane of the wheel.
    [0021] Figure 9 is a sectional view of the wheel taken on line 9 - 9 of Figure 3. DETAILED DESCRIPTION
    [0022] For the purposes of the description below, the term “hub” refers to any device or structure to support the wheel and mount it on a vehicle.
    [0023] The compliant band is formed of a material capable of deforming overload, including folding the band, to envelop obstacles and conform to a contact surface, such as a road or floor. In particular, deformation by folding the web under load forms a patch of contact with the contact surface, which provides traction transmission and steering forces similar to a pneumatic tire. One aspect of the complacency of the wheel material is that the amount of folding of the web refers to the magnitude of the load on the wheel.
    [0024] The compliant band can be made of an elastomeric material, such as natural or synthetic rubber, polyurethane, foamed rubber and foamed polyurethane, segmented copolyesters and nylon block copolymers. Preferably, the material has an elastic modulus of about 9 MPa to about 60 MPa. The band may be unreinforced or may include a reinforcement layer to increase the circumferential inextensibility of the band.
    [0025] The rays of the soul interconnect the cube and the compliant band and act in tension to transmit load forces between the cube and the band. This provides, among other functions, support for the mass of a vehicle. Load-bearing forces are generated by tension in the web rays not connected to the ground contact portion of the band. The loaded cube can be said to hang from the upper portion of the compliant band, which defines an arc supporting the load. The core rays can also be interconnected to form a plurality of core elements comprising a plurality of polygonal openings. It should be understood that when a soul ray is cited, it can refer to a single row of soul rays spanning from the cube to the compliant band, or a plurality of rows of soul ray segments spanning from the cube to the compliant band.
    [0026] For the purpose of describing the invention, reference will now be made in details to the structurally supported non-pneumatic wheel based on tension with reduced lateral stiffness, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one modality can be used with another modality to yield yet an additional modality. Thus, it is intended that the present invention will cover these modifications and variations when they fall within the scope of the appended claims and their equivalents.
    [0027] The structurally supported non-pneumatic tension-based wheel with reduced lateral stiffness 100, shown in perspective in Figure 1, the tread portion 105 is shown connected to hub 10 by a plurality of tension transmission elements illustrated as elements web radius 150. The web radii 150 are shown here connected together at their inner radial ends by an inner band 160 and at their outer radial ends by an outer band 170. Inner band 160 anchors wheel 100 to hub 10. The outer band 170 anchors the tread portion 105 to the wheel 100. Tread characteristics may be formed on the tread portion 105 and may include grooves, ribs, lumps, protrusions and other tread characteristics for traction and aesthetics. Each web radius 150 has a front surface 156 and a rear surface 158.
    [0028] Figure 2 shows a partial close-up perspective view of a wheel 100 model. In this embodiment, each core beam 150 has a mixed profile of three spokes that reduces the stress concentration and encourages predictable flexing in compression. The stress-carrying spokes can be interconnected and / or branched.
    [0029] Figure 3 shows the modality of a sight perpendicular to the equatorial plane of the wheel 100. The tread portion 105 forms the outer surface of the compliant band 110. In this embodiment, each core radius 150 is angled so that the surface front 156 or the rear surface 158 of each web radius is located outside the plane with the transverse axis of the wheel. In this embodiment, the angle of inclination varies from the outer radial end 152 of the web radius 150 to the inner radial end 154 of the web radius. At the inner radial end 154 of the web, the angle of inclination is greater in magnitude than the angle of inclination at the external radial end 152. In the view perpendicular to the equatorial plane of the modality, as shown in Figure 3, the angle of inclination and the web width appears constant from the inner radial end 154 to the outer radial end 152. This appearance is due to the modality having a variable angle of inclination that is less in magnitude at the outer radial end 152 than at the inner radial end 154, although the radius width is greater at the outer radial end 152 than at the inner radial end 154. Although this appearance is present in the modality, it may not be present, or as pronounced in other wheel modes where the chosen angle change is different and or the tapering of the width of the chosen soul ray is different from the modality.
    [0030] Figure 4 shows a partial close view perpendicular to the equatorial plane of the structurally supported non-pneumatic tension-based wheel with reduced lateral stiffness showing two adjacent web spokes 150 having opposite inclination angles.
    [0031] Figure 5 is a sectional view of the adjacent web rays 150 taken on line 5-5 of Figure 4 which is at the outer radial end 152 of the web radius 150. In the embodiment, the angle of inclination is small, if almost parallel to the transverse axis of wheel 100.
    [0032] Figure 6 is a sectional view of the adjacent web radii 150 taken on line 6-6 of Figure 4 which is at an intermediate location along the web radius 150 length. In the modality, the magnitude of the angle of inclination it is greater than at the outer radial end of the web radius 150. The width of the web radius 150 is smaller at the middle portion of the web radius 150 than the width at the outer radial end 152 of the web radius.
    [0033] Figure 7 is a sectional view of the adjacent web rays 150 taken on line 7-7 of Figure 4 which is at an internal radial end location 154 along the length of the web radius 150. In the embodiment, the magnitude the angle of inclination is greater than at the outer radial end 152 of the web radius 150. The width of the web radius 150 at the inner radial end 154 of the web radius is less than the middle portion of the web radius and less than the width of the web radius at the outer radial end 152. In the embodiment, the angle of inclination is 12 degrees at the inner radial end 154 of the web radius.
    [0034] The angle of inclination changes from a lower angle of inclination at the outer radial end to a greater angle of inclination at the inner radial end of the web radius 150. The high inclination angle allows the reduction of the lateral stiffness of the wheel. When discussing smaller or larger tilt angles, it should be obvious that a “smaller” tilt angle refers to a tilt angle that is closer to zero tilt, while a larger tilt angle is an angle that has a larger tilt. regardless of whether the radius is angled clockwise or counterclockwise.
    [0035] Changing the angle of inclination along the length of the web creates a web radius 150 which is twisted. This twist is due to the variation of the angle of inclination when the web radius 150 moves inwardly from the outer band 170 to the inner band 160. When the tread surface 105 of the wheel 100 is placed against a flat surface and the wheel 100 is loaded, for example, by the weight of the vehicle, the compliant band 110 flattens in the ground contact area with the tread portion 105, this contact area also generally referred to as the "footprint". This flattening of the compliant band reduces the distance from the outer band 170 to the inner band 160 resulting in the web spokes 150 above the footprint of the wheel 100 bending along the length of the web radius 150 and deforming across the width of the web radius 150 near of the outer band 170 due to the equatorial flattening and any lateral deformation of the compliant band 110 that may be present due to the sculpture of the tread or the lateral curvature of the surface. This deformation of the web radius can create structural instability in the web radius 150 which is reduced when the angle of inclination is reduced close to the outer band. Thus, the torsion allows for reduced lateral stiffness in the wheel 100 while reducing the structural instability in each individual web radius 150 when bending by allowing a smaller angle of inclination near the outer band 170, but a greater angle of inclination near the inner band 160.
    [0036] Figure 8 shows a sectional view along the equatorial plane of the 100. In the embodiment as shown, the tread portion 105 of the wheel forms the outer periphery of the compliant band 110. Alternatively, the tread portion it can be an additional layer attached to the outer surface of the compliant band. The web spokes 150 have a blend profile of three curved spokes aimed at reducing stress concentrations when the web spokes 150 are carrying the weight of the vehicle, while encouraging predictable flexing in compression. Alternatively, the spokes can be straight. Alternatively, the web radius 150 can be shaped curved, then straightened by thermal shrinkage during cooling to predispose them to bend in a particular direction. The core spokes are joined at the inner radial ends 154 by an inner band 160 that is attached to a hub 10. At the outer radial end 152 of the core spokes 150, each spoke is joined together by an outer band 170 that interconnects the spokes. soul together. In the embodiment, the inner band 160, the core spokes 150 and the outer band 170 are molded of a single material as a unit.
    [0037] Figure 9 shows a cross section of wheel 100 taken on line 9 - 9 of Figure 3 which is a view along a plane through the tire's cross axis. In the embodiment, each core ray tapers from the inner radial end 154 to the outer radial end 152 generally increasing in diameter. This taper can be non-linear, such as, for example, the taper as shown, or alternatively the taper can be linear. In the embodiment shown, the taper of the core radius 150 is non-linear having a left edge 153 and a right edge 155 concave.
    [0038] It should be understood that many other variations are apparent to those versed in the technique from a reading of the specification above. These variations and other variations are within the spirit and scope of the present invention as defined by the following appended claims.
    权利要求:
    Claims (10)
    [0001]
    1. Structurally supported non-pneumatic tension-based wheel (100) comprising: a hub (10); a band supporting compliant load (170) arranged radially outwardly and concentrically with the hub (10); and a plurality of tension-based web elements (150) extending between the hub (10) and the compliant band (170), characterized by the fact that each web element (150) has a tapered lateral width which is greater near the compliant band (170) than near the hub (10) and each core element (150) has a changing tilt angle which is greater near the hub (10) than near the compliant band (170).
    [0002]
    2. Wheel (100) according to claim 1, characterized by the fact that the compliant band (170) comprises a reinforcement membrane embedded in the band.
    [0003]
    3. Wheel (100) according to claim 2, characterized by the fact that the reinforcement membrane comprises strands aligned in the circumferential direction embedded in an elastomeric layer.
    [0004]
    4. Wheel (100) according to any one of claims 1 to 3, characterized by the fact that the web elements (150) act in tension to transmit load forces between the hub (10) and the web and the elements of web (150) do not withstand any compressive forces.
    [0005]
    5. Wheel (100) according to any one of claims 1 to 4, characterized by the fact that the difference in the angle of inclination near the hub (10) compared to the angle of inclination near the compliant band (170) creates the visual appearance when viewing the tire from a view perpendicular to the equatorial plane that the web width appears constant from the inner radial end (154) to the outer radial end (152).
    [0006]
    Wheel (100) according to any one of claims 1 to 5, characterized by the fact that the tapering of the core elements (150) is linear when viewed from a view along a plane through the transverse axis of the wheel ( 100).
    [0007]
    Wheel (100) according to any one of claims 1 to 5, characterized by the fact that the tapering of the core elements (150) is non-linear when viewed from a view along a plane through the transverse axis of the wheel (100).
    [0008]
    8. Wheel (100) according to claim 7, characterized in that the core element (150) has a concave left edge (153) and a concave right edge (155).
    [0009]
    9. Wheel (100) according to any one of claims 1 to 8, characterized in that the angle of inclination of the web spokes (150) proximal to the compliant band (170) is 0.5 degrees, while the inclination angle of the web rays (150) proximal to the cube is greater than 0.5 degree, where the inclination angle is measured as the angle that each of said plurality of web elements (150) makes in relation to the axis transverse of the wheel (100) at a given position along and perpendicular to said radius length, said radius width decreasing and the magnitude of said inclination angle increasing when measured in a radially outward position to a radially inward position.
    [0010]
    10. Wheel (100) according to any one of claims 1 to 9, characterized in that the angle of inclination of the web spokes (150) proximal to the compliant band (170) is 4 degrees, while the angle of inclination inclination of the web spokes (150) proximal to the hub is 12 degrees, where the inclination angle is measured as the angle that each of said plurality of web elements (150) makes in relation to the transverse axis of the wheel (100 ) at a given position along and perpendicular to said radius length, said radius width decreasing and the magnitude of said angle of inclination increasing when measured in a radially outward position to a radially inward position.
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    法律状态:
    2018-11-13| B25A| Requested transfer of rights approved|Owner name: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN (CH |
    2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-09-01| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2020-12-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    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 20/10/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201361893139P| true| 2013-10-18|2013-10-18|
    US61/893,139|2013-10-18|
    PCT/US2014/061328|WO2015058181A1|2013-10-18|2014-10-20|Non-pneumatic wheel with reduced lateral stiffness|
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