专利摘要:
non-pneumatic tire with partially compliant hub. structurally supported non-pneumatic wheel comprising: a hub portion, said hub portion comprising: a mounting disc (205) having a generally circular outer periphery and an axially elongated toroidal structure (259) mounted concentrically with said disc mounting and encapsulating said periphery of said mounting disc; a load-bearing band (109) disposed radially outward and concentric with said hub; a plurality of tension-based network elements (129) extending between said hub portion and said compliant load-bearing band; wherein said mounting disc is constructed of a material having a modulus of elasticity greater than the modulus of elasticity of the material used to construct said outer toroidal structure.
公开号:BR112016026818B1
申请号:R112016026818-0
申请日:2014-05-16
公开日:2021-06-01
发明作者:Kevin C. Miles;Steven M. Cron
申请人:Compagnie Generale Des Etablissements Michelin;
IPC主号:
专利说明:

FIELD OF THE INVENTION
[001] The subject of the present invention refers to a compliant hub as it can be used in a non-pneumatic wheel. FUNDAMENTALS OF THE INVENTION
[002] The details and benefits of non-pneumatic tire constructions are described, for example, in US Patents 6,769,465; 6,994,134; 7,013,939; and 7,201,194. Certain non-pneumatic tire constructions propose to incorporate a shear band, embodiments of which are described, for example, in US Patents 6,769,465 and 7,201,194 which are incorporated herein by reference. These non-pneumatic tires provide advantages in tire performance without relying on a gas inflation pressure to support the loads applied to the tire. A typical example of such non-pneumatic tires has a center hub, an inner interface element joined to the center hub, a tread to interface with the ground surface, an outer interface element joined or integral to the tread, and a plurality of core elements connecting the inner interface element to the outer interface element or tread.
[003] Such non-pneumatic rims or hubs require a relatively thin mounting surface through which fasteners, such as wheel bolts or studs, can pass to mount the tire to the vehicle and a relatively wide web element mounting surface to allow a more uniform deformation and stress distribution across the core elements. The cube, usually constructed of metal, can be constructed as two pieces, a vertical central portion and a substantially cylindrical piece or "can" which are clamped together or cast as a single piece of a large mass of metal. The hub can represent a significant cost of the non-pneumatic tire.
[004] Occasionally, a non-pneumatic tire, such as a pneumatic tire, experiences an impact event that exceeds a certain force causing unwanted permanent damage. These events can occur when encountering a curb or other obstacle at excessive speed. During this event, sometimes referred to as a "puncture shock event" permanent plastic deformation or fracture of the rim or damage to other wheel or tire components is possible.
[005] Therefore, a hub that can simplify and reduce construction cost, while increasing wheel durability, would be beneficial. Such a hub that can be incorporated into a variety of non-pneumatic tire constructions would be particularly useful. SUMMARY OF THE INVENTION
[006] Aspects and advantages of the invention will be set forth in part in the following description or may be obvious from the description or may be learned by practicing the invention.
[007] In an exemplary embodiment, the present invention provides a partially compliant hub for securing a structurally non-pneumatic supported wheel having a disc-shaped central portion and a toroidally shaped outer portion circumferentially placed around the periphery of said central portion at disk-shaped, wherein said central disk-shaped central portion has a higher modulus of elasticity than the toroidally-shaped outer portion.
[008] In another exemplary embodiment, the disc-shaped central portion of the partially compliant hub is constructed of stamped steel.
[009] In another exemplary embodiment, the disc-shaped central portion of the partially compliant hub is constructed of cast metal.
[010] In another exemplary embodiment, the disc-shaped central portion of the partially compliant hub has a plurality of circumferentially spaced openings near the periphery of the disc-shaped and toroidal outer portion.
[011] In another exemplary embodiment, a non-pneumatic structurally supported wheel comprises: a hub portion comprising a mounting disk having a generally circular outer periphery and an axially elongated toroidal structure fixedly mounted concentrically with the mounting disk and encapsulating said periphery external mounting disc; a compliant load-bearing band disposed radially outwardly and concentrically with said hub; a plurality of tension-based core elements extending between said hub portion and said compliant load-bearing band; wherein said mounting disc is constructed of a material having a modulus of elasticity greater than the modulus of elasticity of the material used to construct said outer toroidal structure, wherein said plurality of core elements and said toroidal structure they are molded as a unitary structure.
[012] These modalities, and the modalities that follow, allow for a less expensive partially compliant hub structure that is more resistant to plastic deformation, light weight and results in a wheel structure that is even more compliant than a wheel having a frame. of rigid cube.
[013] These and other features, aspects and advantages of the present invention will be better understood with reference to the following description and the appended claims. The accompanying drawings which are incorporated in and constitute a part of this descriptive report illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[014] A complete and enabling disclosure of the present invention, including the best mode thereof, addressed to those skilled in the art, is set forth in the descriptive report which makes reference to the attached figures, in which:
[015] FIG. 1 provides a perspective view of an exemplary embodiment of a non-pneumatic tire as may incorporate a partially compliant hub of the present invention.
[016] FIG. 2 provides a side view of the compliant hub embodiment when viewed from the side on which it is mounted to the vehicle.
[017] FIG. 3 provides a radial sectional view of the tire of FIG. 2 as taken along line 3-3 in FIG. two.
[018] FIG. 4 is a radial sectional view of a portion of an exemplary embodiment of a compliant hub having a toroidal portion secured to an internal interface element.
[019] FIG. 5 is a side view of the inner surface of the disc portion of the hub without the toroidal encapsulating portion.
[020] FIG. 6 is a partial perspective view of a portion of an exemplary embodiment of a compliant hub having scalloped portions and radially extending web portions.
[021] FIG. 7 is a side view of an exemplary embodiment having web elements effectively shortened by joining two adjacent web elements on the inner interface element or on the toroidal portion of the hub.
[022] The use of identical or similar reference numerals in different figures denotes identical or similar features. DETAILED DESCRIPTION OF THE INVENTION
[023] The present invention provides a partially compliant hub that can be used, for example, in a non-pneumatic tire. For purposes of describing the invention, reference will now be made in detail to embodiments and/or methods of the invention, 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 or steps illustrated or described as part of an embodiment can be used with another embodiment or steps to yield still additional modalities or methods. Thus, it is intended that the present invention cover such modifications and variations when they come within the scope of the appended claims and their equivalents.
[024] The following terms are defined as follows for this disclosure:
[025] "Axial direction" or the letter "A" in the figures refers to a direction parallel to the axis of rotation, eg of the shear band, tire and/or wheel when they travel along a road surface .
[026] "Radial direction" or the letter "R" in the figures refers to a direction that is orthogonal to the axial direction and extends in the same direction as any radius that extends orthogonally to the axial direction.
[027] "Equatorial plane" means a plane that passes perpendicular to the axis of rotation and intersects the shear band and/or the wheel structure.
[028] "Radial plane" means a plane that passes perpendicular to the equatoril plane and through the axis of rotation of the wheel.
[029] FIG. 1 provides an exemplary embodiment of a non-pneumatic tire 101 as may incorporate a partially compliant hub 201 of the present invention. The 201 compliant cube of this modality allows resistance to permanent deformation in an impact event allowing elastic deformation during the event and returning to its original shape thereafter.
[030] In a test performed using a pendulum impact device, for example, a conventional metal "can" cube was compared with a cube constructed in accordance with the disclosed invention and having an inner cube disc-shaped portion of metal having an outer periphery surrounded by a toroid-shaped outer cube portion of polyurethane. The conventional metal "can" cube plastically deformed after an impact having 1390 Joules and 6257 kilograms of force, while the cube constructed according to the invention withstood 3426 Joules and 9471 kilograms of force without plastic deformation.
[031] FIG. 2 provides a side view of the non-pneumatic tire embodiment 101. The embodiment shown has a tread 109, an outer interface strip 119, tension support core elements 129, an inner interface strip 139, and an inner hub 201 A plurality of wheel hub fastener openings 209 are shown placed in a circular pattern. Each wheel hub fastener opening 209 allows a portion of a wheel hub fastener to pass through to secure the wheel to the vehicle. Generally, the wheel hub fastener is a threaded wheel stud which is secured to the outside of the hub 201 with a wheel bolt nut. Alternatively, the wheel hub fastener may be a wheel bolt passing through from the outside of the wheel to a threaded opening in the vehicle. It will be understood that while these two fasteners represent two alternatives, any type of fastener can be used with the invention. It will be appreciated that the number and placement of fastener openings 209 may vary.
[032] The hub 201 of the current mode is comprised of a central disc portion 205 and a relatively more flexible outer toroidal portion 259. The inner interface band 139 may be a separate component attached to the outer surface of the outer toroidal portion 259 or band of inner interface 139 may be integral with outer toroidal portion 259, such as when core elements 129 and outer cylindrical portion 259 are molded from a continuous mold cavity. In the case where the inner interface element is integral with the outer toroidal portion, the term "inner interface element" can be used to refer to the "outer toroidal portion" and vice versa.
[033] The disc portion 205 of the present embodiment of the hub 201 is formed from a stamped sheet of metal bent into a generally flat disc-like shape. It will be understood that the central disc portion 205 may also be cast or forged and may be constructed of a material having a stiffness greater than that of the toroidal portion 259 which, in the present embodiment, is constructed of a material having a lower stiffness than the disc portion 205. The toroidal portion 259 of the present embodiment has a toroidal shape which is elongated in the axial direction forming a generally cylindrical shape. The outer circumference of the central disc portion 205 is connected to the outer toroidal portion 259.
[034] Figure 3 shows a tire 201 in cross-sectional view taken along line 3-3 in FIG. 2. This view is perpendicular to the equatorial plane of the tire. The outer periphery 207 of the central disk portion 205 of the present embodiment is encapsulated by the toroidal portion 259 of the hub 201.
[035] The disk portion 205 of the present embodiment 101 is positioned parallel with an equatorial plane of the tire. The disk portion 205 has a crease 219 at the outer periphery 207 so that the outer portion is circumferentially bent approximately 90 degrees forming a lip around the outer circumference of the disk 205. The crease 219 exposes a greater surface area to the generated radial forces by the weight carried by the tire and allows for greater bonded surface area from the disc portion 205 to the toroidal portion 259.
[036] The toroidal portion 259 of the present embodiment has a cross section with an inner concave curved portion 265 between the disc 205 and inner portion 115 of the wheel and an inner concave portion 269 making the transition to an inclined but flat portion 271 between disc 205 and outer portion 117 of the wheel. The slanted and concave portions 271, 269 and 265 create a toroid taper away from the disc 205.
[037] In the present embodiment, the core elements 129 and the toroidal portion 259 are formed of the same material. In this embodiment, the disc portion 205 of the hub 201 and the tread 109 are positioned within a mold. An elastomeric material is then poured into the mold forming the outer interface band 119, the core elements 129 and the toroidal hub portion 259 as a unitary structure. The elastomeric material in the present embodiment can be any suitable elastomeric material such as natural or synthetic rubber, polyurethane, foamed rubber and foamed polyurethane, segmented copolyesters and nylon block copolymers. The molding of the toroidal portion and core elements simplifies hub construction and reduces cost, whilst allowing for a compliant composite hub particularly suited to a tension-based non-pneumatic wheel. Cost savings and construction simplification are evident by simplifying the hub construction and eliminating the need to build a cylindrically formed portion extending in the axial direction of the wheel to support the load of the core elements.
[038] Alternatively, the hub portion 201 is formed in an earlier step by placing a central disc 205 into a mold, molding the toroidal portion 259, removing the hub 201 from the mold, then placing the formed hub 201 and the tread 109 in a different mold and pouring an elastomeric material forming the outer interface band 119, the core elements 129 and the inner interface band 139. This alternative embodiment 103, as shown in Fig. 4, allows the designer to select a material having a different stiffness for the toroidal portion 259 of the hub 201 than the outer interface band 119, the core elements 129 and the inner interface band 139. In this particular embodiment, the toroidal portion of the hub may be constructed of a polymer including an elastomer. , plastic or composite, such as glass-filled nylon. Thus, the toroidal portion 259 of the hub 201 may have a different modulus than the material used to form the core elements 129.
[039] It will be understood that any of the modalities in this document the external interface band 119 may have reinforcement elements, such as metallic cords or natural or synthetic cords or textiles, or the tread band 109 may have reinforcement elements, or some combination of both the interface element 119 and the tread band 109, having reinforcing elements such as metallic cords or natural or synthetic cords or textiles.
[040] In yet another modality, the tread can be omitted and the external interface band can serve the functionality of a tread having both reinforcing elements and interfacing with the surface on which the wheel operates.
[041] Fig. 5 shows a view of the inner surface 223 of the disk portion 205 of the hub 201 without the toroidal encapsulating portion 259. The outer periphery 207 of the disk 205 has a plurality of apertures 213 spaced circumferentially around the disk. In the present embodiment, when the outer toroid portion is molded around the periphery 207 of the disc 205, the apertures 213 are incorporated within the elastomeric material. During the molding process the openings 213 promote the flow of the elastomeric material before curing. Apertures 213 also allow the elastomeric material to surround localized portions of the disc by further affixing disc 205 to the toroidal portion 259 of hub 201. In alternative embodiments apertures 213 may be present in a different amount or absent altogether. A center axle opening 221 may be positioned on disc 205 to allow initial wheel alignment on a vehicle, such as a vehicle hub. Circumferentially spaced wheel fastener openings 209 allow the mounted wheel to be fixedly secured to the vehicle. Although four fastener openings 209 are shown, it will be understood that the number and/or spacing of openings 209 may vary depending on the application.
[042] The embodiments illustrated above show a toroidal portion having a smooth surface. Alternatively, as shown in Fig. 6, the toroidal portion 259 of the present invention may have depressions 231 and webs 233 along the center facing surface of the toroidal portion, the center facing surface being along the inner surface 265 and/ or of the outer surface 269, 271, as shown in Figure 6. It will be understood that as used herein, a "toroidal" shape includes toroidal shapes which may have core or jagged features, or surfaces which are textured or otherwise. marked mode.
[043] Another embodiment is shown in Fig. 7, in which each web element 129 of an adjacent pair of web elements 129 is effectively shortened by partially filling the empty space adjacent to the cube and between the adjacent web elements 129. full 131 or "rib" increases hub stiffness and increases wheel torsional stiffness.
[044] It will be understood that other web element configurations and geometries may be used within the scope of the invention, including web elements which are interconnected, such as when they may form a beehive or other pattern.
[045] Although the present matter has been described in detail with respect to specific exemplary modalities and methods thereof, it will be appreciated that those skilled in the art, upon obtaining an understanding of the foregoing, can readily produce changes, variations, and equivalents of those modalities . Therefore, the scope of this disclosure is by way of example rather than by way of limitation and the disclosure in question does not exclude the inclusion of such modifications, variations and/or additions to the subject matter in question, as would be readily apparent to those of skill in the art. in technique.
权利要求:
Claims (15)
[0001]
1. Structurally supported non-pneumatic wheel characterized in that it comprises: a hub portion (201), said hub portion (201) comprising: a mounting disc (205) having an outer periphery (207) circular and a axially elongated toroidal structure (259) mounted concentrically with said mounting disk (205) and encapsulating said outer periphery (207) of said mounting disk (205); concentric with said hub portion (201); a plurality of tension-based mesh elements (129) extending between said hub portion (201) and said compliant load-bearing band; mounting disc (205) is constructed of a material having a modulus of elasticity greater than the modulus of elasticity of the material used to construct said outer toroid structure (259).
[0002]
2. Structurally supported non-pneumatic wheel according to claim 1, characterized in that said plurality of mesh elements (129) and said toroidal structure (259) are molded as a unitary structure.
[0003]
3. Structurally supported non-pneumatic wheel according to claim 1, characterized in that it further comprises an internal interface band (139) adhered to the outer surface of said toroidal structure (259), said plurality of mesh elements (129 ) based on direct voltage with said inner interface band (139) and said load-bearing band and extending from the inner interface band (139) outwardly to said compliant load-bearing band.
[0004]
4. Structurally supported non-pneumatic wheel according to claim 1, characterized in that said plurality of mesh elements (129), said compliant load-bearing band and said toroidal structure (259) are molded as a unitary structure.
[0005]
5. Structurally supported non-pneumatic wheel according to claim 2, characterized in that it further comprises an outer interface band (139) adhered to the inner surface of a compliant load-bearing band, said plurality of network elements (129) on the basis of continuous tension with said band (139) of toroidal interface and extending to the compliant load-bearing band.
[0006]
6. Structurally supported non-pneumatic wheel according to claim 1, characterized in that it further comprises: an internal interface band (139) adhered to the external surface of said toroidal structure (259), said plurality of network elements ( 129) based on direct voltage with said internal interface band (139); and an external interface band (139) adhered to the internal surface of the compliant load-bearing band, said plurality of network elements (129) on the basis of continuous voltage with said toroidal interface band (139) and extending to said compliant load-bearing band.
[0007]
7. Structurally supported non-pneumatic wheel according to claim 1, 3 or 6, characterized in that said material of said toroidal portion (259) has a different modulus of elasticity than the material of said mesh elements (129).
[0008]
8. Structurally supported non-pneumatic wheel according to claim 1, 2, 3, 4 or 6, characterized in that said inner mounting disc (205) has a plurality of circumferentially spaced apertures (213) positioned close to the the outer periphery (207) of said mounting disc (205) and said toroidal portion (259) surrounds said plurality of apertures (213), wherein said toroidal portion (259) surrounds localized portions of the disc (205).
[0009]
9. Structurally supported non-pneumatic wheel characterized in that it comprises: a hub portion (201), said hub portion (201) comprising: a mounting disc (205) having a circular outer periphery (207) and a axially elongated toroidal structure (259) mounted concentrically with said mounting disk (205) and encapsulating said outer periphery (207) of said mounting disk (205); concentric with said hub portion (201); an interface band (139) adhered to the inner surface of said compliant load-bearing band; a plurality of network elements (129) based on continuous tension with and extending between said toroidal portion (259) and said interface band (139); wherein said mounting disc (205) is constructed of a material having a modulus of elasticity greater than the modulus of elasticity of the material used to construct said outer toroidal structure (259), wherein said plurality of mesh elements (129) and said toroidal structure (259) are molded as a unitary structure.
[0010]
10. Structurally supported non-pneumatic wheel according to claim 1, 2, 3, 4, 6 or 9, characterized in that said inner mounting disc (205) is flat.
[0011]
11. Structurally supported non-pneumatic wheel according to claim 10, characterized in that at least a portion of said outer periphery (207) of said hub portion (201) is bent in an axial direction.
[0012]
12. Structurally supported non-pneumatic wheel according to claim 11, characterized in that said portion of the hub (201) is constructed from a stamped metal sheet.
[0013]
13. Structurally supported non-pneumatic wheel characterized by the fact that it comprises: a hub portion (201), said hub portion (201) comprising: a flat mounting disc (205) having a circular outer periphery (207) having a length. minus a portion of which is bent in an axial direction and an axially elongated toroidal structure (259) mounted concentrically with said mounting disk (205) and encapsulating said periphery (207) of said mounting disk (205); compliant load-bearing band radially outwardly disposed and concentric with said hub portion (201); an interface band (119;139) adhered to the inner surface of said compliant load-bearing band; a plurality of network elements (129) based on continuous tensions with and extending between said toroidal portion (259) and said interface band (119;139); wherein said mounting disc (205) is constructed of a material having a mod a radius of elasticity greater than the modulus of elasticity of the material used to construct said outer toroidal structure (259) wherein said plurality of mesh elements (129) and said toroidal structure (259) are molded as a unitary structure.
[0014]
14. Structurally supported non-pneumatic wheel according to any one of claims 1 to 13, characterized in that said toroidal portion (259) has a plurality of ribs (233) on the center-facing surface of said toroidal portion (259 ).
[0015]
15. The structurally supported non-pneumatic wheel of any one of claims 1 to 14, characterized in that said toroidal portion (259) has a plurality of depressions (231) on the surface facing the center of said toroidal portion (259).
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法律状态:
2019-03-19| B25A| Requested transfer of rights approved|Owner name: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN; (F |
2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
2020-11-17| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
2021-03-16| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
2021-06-01| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/05/2014, OBSERVADAS AS CONDICOES LEGAIS. |
优先权:
申请号 | 申请日 | 专利标题
PCT/US2014/038472|WO2015175003A1|2014-05-16|2014-05-16|Non-pneumatic tire with partially compliant hub|
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