US20160214435A1 - Wheel assemblies with non-pneumatic tires - Google Patents
Wheel assemblies with non-pneumatic tires Download PDFInfo
- Publication number
- US20160214435A1 US20160214435A1 US14/729,495 US201514729495A US2016214435A1 US 20160214435 A1 US20160214435 A1 US 20160214435A1 US 201514729495 A US201514729495 A US 201514729495A US 2016214435 A1 US2016214435 A1 US 2016214435A1
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- United States
- Prior art keywords
- pneumatic tire
- rim
- circumferential ring
- ridges
- partitions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000000429 assembly Methods 0.000 title description 3
- 238000005192 partition Methods 0.000 claims abstract description 39
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B15/00—Wheels or wheel attachments designed for increasing traction
- B60B15/02—Wheels with spade lugs
- B60B15/023—Wheels with spade lugs being of the broad form type
- B60B15/025—Wheels with spade lugs being of the broad form type with non-cylindrical shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/002—Rims split in circumferential direction
- B60B25/006—Rims split symmetrically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B9/00—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces
- B60B9/02—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces using springs resiliently mounted bicycle rims
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B9/00—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces
- B60B9/26—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces comprising resilient spokes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
- B60C7/14—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs
- B60C7/143—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs having a lateral extension disposed in a plane parallel to the wheel axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
- B60C7/14—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs
- B60C7/16—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs of helical or flat coil form
- B60C7/18—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs of helical or flat coil form disposed radially relative to wheel axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/24—Non-inflatable or solid tyres characterised by means for securing tyres on rim or wheel body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/24—Non-inflatable or solid tyres characterised by means for securing tyres on rim or wheel body
- B60C7/26—Non-inflatable or solid tyres characterised by means for securing tyres on rim or wheel body using bolts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
- B60C7/107—Non-inflatable or solid tyres characterised by means for increasing resiliency comprising lateral openings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C7/00—Non-inflatable or solid tyres
- B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
- B60C7/14—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs
- B60C7/146—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs extending substantially radially, e.g. like spokes
Definitions
- the present application is directed to a non-pneumatic tire and a wheel assembly using a non-pneumatic tire, and more particularly, to a non-pneumatic tire for outdoor power equipment.
- tires made of an airtight inner core filled with pressurized gas.
- a tread usually reinforced with steel belting or other materials, covers this inner core and provides an area which contacts the traction surface.
- these tires are damaged or otherwise caused to be deflated during shipment.
- these tires may lose pressure after remaining in a single location for extended periods, such as a snow thrower stored in a shed during summer months. This loss of pressure requires correction or replacement by the equipment user or by a member of the equipment supply chain. This can lead to costly warranty issues.
- the subject application involves a non-pneumatic tire assembly including a non-pneumatic tire.
- the non-pneumatic tire includes an inner circumferential ring and an outer circumferential ring defining an annular space between the circumferential rings.
- the inner circumferential ring also defines a cylindrical space inside the inner circumferential ring.
- the non-pneumatic tire also includes a plurality of partitions within the annular space. The partitions connect the circumferential rings.
- the non-pneumatic tire further includes a ground-contacting tread located on the outer circumferential ring.
- the non-pneumatic tire assembly also includes a rim.
- the rim includes a plurality of pieces, and the rim is located within the cylindrical space.
- the non-pneumatic tire assembly further includes a hub. The hub is removably connected to the rim.
- the subject application involves a non-pneumatic tire.
- the non-pneumatic tire includes an inner circumferential ring and an outer circumferential ring defining an annular space between the circumferential rings.
- the inner circumferential ring also defines a cylindrical space inside the inner circumferential ring.
- the non-pneumatic tire also includes a plurality of partitions within the annular space. The partitions connect the circumferential rings.
- the non-pneumatic tire further includes a ground-contacting tread located on the outer circumferential ring.
- FIG. 1 is a perspective view of a non-pneumatic tire assembly according to an aspect of the present disclosure
- FIG. 2 is an exploded view of the non-pneumatic tire assembly of FIG. 1 ;
- FIG. 3 is an elevation side view of a non-pneumatic tire showing “V-shaped” partitions connected to an outer circumferential ring between tire tread ridges;
- FIG. 4 is similar to FIG. 3 , having partitions connected to the outer circumferential ring directly opposite the tire tread ridges;
- FIG. 5 is a perspective view of a non-pneumatic tire having wishbone-shaped partitions
- FIG. 6 is an elevation view of a non-pneumatic tire having “U-shaped” partitions
- FIG. 7 is an elevation view of a non-pneumatic tire having “O-shaped” partitions
- FIG. 8 is a partial elevation view of a non-pneumatic tire section having oval-shaped partitions
- FIG. 9 is a cross-section view of the non-pneumatic tire assembly taken along line 9 - 9 of FIG. 1 ;
- FIG. 10 is an elevation view of a non-pneumatic tire assembly showing elastic deformation while placed on a snow-covered surface.
- Example embodiments that incorporate one or more aspects of the present disclosure are described and illustrated in the drawings. These illustrated examples are not intended to be a limitation on the present disclosure. For example, one or more aspects of the present disclosure can be utilized in other embodiments and even other types of devices. Moreover, certain terminology is used herein for convenience only and is not to be taken as a limitation on the present disclosure. Still further, in the drawings, the same reference numerals are employed for designating the same elements.
- non-pneumatic tire provides for a non-pneumatic tire and wheel configuration, herein called “non-pneumatic tire,” which can improve certain traction aspects while reducing the need for conventional service and maintenance.
- the non-pneumatic tire may be attached to both pedestrian or “walk-behind” and “riding” outdoor power equipment, including, but not limited to, walk-behind mowers and snow throwers, riding mowers and snow blowers, lawn and garden tractors, and utility vehicles.
- walk-behind mowers and snow throwers including, but not limited to, walk-behind mowers and snow throwers, riding mowers and snow blowers, lawn and garden tractors, and utility vehicles.
- the remainder of the disclosure will describe the non-pneumatic tire assembly as used on a snow thrower.
- FIG. 1 a perspective view of an exemplary embodiment of a non-pneumatic tire assembly 20 includes a non-pneumatic tire 24 .
- the non-pneumatic tire includes an inner circumferential ring 26 and an outer circumferential ring 28 . Together, the inner circumferential ring 26 and the outer circumferential ring 28 define an annular space 30 between the circumferential rings 26 , 28 and a cylindrical space 34 inside the inner circumferential ring 26 .
- the non-pneumatic tire also includes a plurality of partitions 36 within the annular space 30 , extending between and connecting the two circumferential rings 26 , 28 .
- the geometry of the partitions 36 can vary, as will be described below, however, regardless of the geometry, the partitions 36 are designed to support the weight of the outdoor power equipment and transfer that weight to a riding surface (e.g., ice, snow, earth, pavement, etc.) Additionally, the design of the partitions 36 enables the partitions 36 to resist permanent (plastic) deformation while enabling some amount of temporary (elastic) deformation as the non-pneumatic tire assembly 20 rolls and supports the weight of the outdoor power equipment. In one example, the partitions 36 are non-radial, meaning that the partitions 36 are not straight-line segments that lie on any radius of the non-pneumatic tire 24 .
- the partitions 36 can include any number of suitable generalized shapes from the vantage point of an out-board side 38 or an in-board side 40 of the non-pneumatic tire 24 in a direction parallel to the axis 42 of the non-pneumatic tire assembly 20 .
- the generalized shape of the partitions 36 can remain constant through the axial width of the non-pneumatic tire 24 .
- the partitions 36 can have a generalized shape of a wishbone.
- the non-pneumatic tire 24 of FIGS. 3 and 4 includes partitions 36 having a generalized shape of a “V.”
- FIG. 6 shows the partitions 36 having a U-shape
- FIG. 7 shows the partitions 36 in an “O” or a circle shape.
- the partitions 36 having a generalized shape of an oval.
- the partitions 36 can include these generalized shapes and/or combinations of these shapes in patterns that can repeat around the annular space 30 .
- the partitions 36 can have an ogive or hypocycloid shape that repeats around the annular space 30 .
- the non-pneumatic tire 24 further includes a ground-contacting tread 44 located on the outer circumferential ring 28 .
- the ground-contacting tread 44 is located on an exterior side 46 of the outer circumferential ring 28 .
- the ground-contacting tread 44 can include a plurality of ridges 48 extending axially across the exterior side 46 of the outer circumferential ring 28 .
- the ridges 48 can include a single ridge portion 50 on one axial side of the outer circumferential ring 28 and a split ridge portion 54 on the other axial side of the outer circumferential ring 28 .
- the split ridge portion 54 can define a slot 56 between the two peaks 58 of the split ridge portion 54 .
- the described ridge 48 including the single ridge portion 50 and the split ridge portion 54 can extend to any suitable radial distance 60 from the outer circumferential ring 28 .
- This distance 60 can vary along the axial width of the non-pneumatic tire 24 .
- the ridges 48 can include a radial distance 60 A such that the center of the ridge 48 along the axial width is greater than the radial distance 60 B at the ends of the ridge 48 .
- This arrangement of a varied radial distance 60 creates a peaked elevation 64 away from the outer circumferential ring 28 .
- This peaked elevation 64 and the single ridge portion 50 and split ridge portion 54 can develop higher fore-aft traction in the non-pneumatic tire 24 while reducing the sideways (axial) fraction of the non-pneumatic tire 24 . This can ease the operation of sliding outdoor power equipment (e.g., a snow thrower) sideways and/or turning the snow thrower.
- the peaked elevation 64 is located at about the axial center point of the plurality of ridges 48 .
- adjacent ridges 48 can alternate orientation such that the split ridge portion 54 of a single ridge 48 is located on the in-board side 40 of the non-pneumatic tire 24 while the split ridge portion 54 of the adjacent ridge 48 in either direction around the outer circumferential ring 28 is located on the out-board side 38 of the non-pneumatic tire 24 .
- This alternating arrangement of ridges 48 can enable the non-pneumatic tire 24 (and the non-pneumatic tire assembly 20 ) to be “omni-directional,” meaning that the non-pneumatic tire 24 has equal traction in the fore and aft operating directions.
- the non-pneumatic tire 24 can be mounted to the remainder of the non-pneumatic tire assembly 20 whether the in-board side 40 is facing toward the outdoor power equipment or away from the outdoor power equipment. This omni-directional feature can ease assembly and maintenance of the outdoor power equipment.
- the described ridge orientation also enables the non-pneumatic tire 24 to be molded in a simple mold or die that does not require any “action” or moving parts in the die. In other words, the non-pneumatic tire 24 is molded in a relatively simple, axial motion die.
- each ridge 48 includes a height dimension and a width dimension. These dimensions can be calculated, constructed, and tested to resist deformation under particular circumstances such as supporting the weight of the outdoor power equipment for extended periods of time while in a single position. In an even more particular circumstance, the ridges 48 can resist deformation while supporting the weight of the outdoor power equipment for extended periods of time in a single position at increased temperature, such as shed storage during a summer season.
- the aspect ratio of each ridge 48 is between about 1:1 to about 2:1. More particularly, the aspect ratio of each ridge 48 is between about a value slightly larger than 1 : 1 to no larger than 2:1.
- the tread can take any suitable shape or form. The shown examples of the ridges are but one example, and are not meant to be limiting.
- the location of the partitions 36 can be located at various positions relative to the ridges 48 .
- FIG. 3 shows the “V” shaped partitions 36 connecting with the outer circumferential ring 28 at approximately a midpoint between each ridge 48 .
- the partitions 36 can be shifted circumferentially such that they connect with the outer circumferential ring 28 at positions directly opposite the ridges 48 , as shown in FIG. 4 .
- These locations can be calculated and selected to develop preferential load bearing and/or deflection characteristics in the non-pneumatic tire 24 .
- the ridges 48 can be spaced at any selected interval to develop preferential deflection and/or traction characteristics.
- the ridges 48 are spaced approximately one-inch apart on the circumference of the outer circumferential ring 28 .
- the partitions 36 can define arcuate sides 66 on a sidewall area that extend in an axial direction relative to the edges of the inner circumferential ring 26 and the outer circumferential ring 28 .
- These arcuate sides 66 can act as built-in wear surfaces and/or bumpers for a snow thrower. For example, as an operator guides the snow thrower along a path having a border such as a curb, the arcuate sides 66 can contact the curb prior to other portions of the snow thrower. The operator can then “drive by feel” by keeping the arcuate sides 66 in contact with the curb or other physical structure.
- the arcuate sides 66 can prevent contact wear and/or damage to other portions of the non-pneumatic tire assembly 20 (e.g., the rim) and the snow thrower.
- the arcuate sides 66 can include a curve 68 that extends to the ridges 48 of the ground-contacting tread 44 .
- the non-pneumatic tire 24 can be constructed of any suitable material.
- the non-pneumatic tire 24 is formed from a plastic containing a rubber filler material.
- the non-pneumatic tire 24 is formed from a thermoset polymer.
- the non-pneumatic tire 24 material can be selected to optimize tire performance. For example, the material can achieve a balance between traits of solidity to promote tire strength and resistance to permanent deformation during relatively hot long-term storage (e.g., a snow thrower in a shed during summer months), and traits of flexibility to promote tire traction and an ability to shed snow collected in the ground-contacting tread 44 as it rolls along a snow-covered surface 70 .
- the ground-contacting tread 44 of the non-pneumatic tire 24 contacts the snow/ice covered surface 70 (e.g., driveway, sidewalk, etc.).
- the weight of the snow thrower causes elastic deformation of the non-pneumatic tire 24 such that a plurality of ridges 48 contact the snow/ice covered surface 70 at any given time.
- This deformation causes the individual ridges 48 to deform toward one another and decrease the distance 74 between the ridges 48 .
- This can trap snow, ice, and other objects between the ridges 48 of the ground-contacting tread 44 .
- the same is true for the distance 76 between the two peaks 58 of the split ridge portion 54 .
- the non-pneumatic tire assembly 20 continues to roll along the surface 70 in the direction of arrow 77 , a portion of the non-pneumatic tire 24 leaves contact with the surface 70 .
- the ground-contacting tread 44 leaves the surface, it is no longer bearing the weight of the snow thrower, and reverts back to its original formation; increasing the distances between individual ridges 48 and the two peaks 58 of the split ridge portion 54 .
- This reversion tends to urge collected material (e.g., snow, ice, etc.) out and away from the spaces between the individual ridges 48 and the two peaks 58 . Removal of collected material can enable improved traction for the non-pneumatic tire assembly 20 when compared to other tire assemblies that do not automatically remove collected material from the tread.
- the non-pneumatic tire 24 can be formed in a single, unitary piece as shown in FIGS. 1-7 .
- the non-pneumatic tire 24 can comprise a plurality of generally arcuate sections 78 as shown in FIG. 8 . A number of such sections 78 can be assembled to form a complete, cylindrical non-pneumatic tire 24 .
- each arcuate section 78 can include a slot 80 at one end and a tab 84 at the other end. The tabs 84 and slots 80 of adjacent arcuate sections 78 can be urged into mating arrangement to form a cylindrical non-pneumatic tire 24 .
- the non-pneumatic tire 24 can be injection molded. In either case, the selected geometry of the non-pneumatic tire 24 can be configured such that the tooling used to create the non-pneumatic tire 24 does not include any slides or “action” as previously noted.
- the non-pneumatic tire 24 can define a textured profile 86 on an interior surface 70 .
- the textured profile 86 can include any suitable structure to enable transmission of rotational force from a power supply, through any intermediate structure, to the non-pneumatic tire 24 such that rotational motion developed at the power supply can urge rotational motion of the non-pneumatic tire 24 .
- the textured profile 86 consists of axial ridges 88 on an interior surface 70 of the inner circumferential ring 26 . It is to be appreciated that various intermediate structures may be included between the power supply and the non-pneumatic tire 24 , including, but not limited to: axles, transmissions, etc.
- the non-pneumatic tire assembly 20 also includes a rim 90 .
- the rim 90 includes a plurality of pieces.
- the rim 90 includes an in-board rim half 94 and an out-board rim half 96 , however, this example is not meant to be limiting. However many pieces there are, the rim 90 is located within the cylindrical space 34 inside the inner circumferential ring 26 .
- the in-board rim half 94 and the out-board rim half 96 can be fastened together by any suitable means to form a complete rim 90 .
- the in-board rim half 94 and the out-board rim half 96 are separably attached using fasteners 98 .
- the fasteners 98 can pass through apertures 100 defined in the in-board rim half 94 and the out-board rim half 96 .
- the apertures 100 in the in-board rim half 94 can be aligned with the apertures 100 of the out-board rim half 96 .
- the apertures 100 can be defined in a portion of the rim half 94 , 96 that is a vertical plane 104 .
- the vertical plane 104 from the in-board rim half 94 can be aligned with and even be in contact with the vertical plane 104 of the out-board rim half 96 .
- Contact between the vertical planes 104 can enhance the strength of the fastened connection between the rim halves 94 , 96 and minimize any deformation of either rim half 94 , 96 as they are fastened together.
- the rim 90 can include a circumferential surface 105 on its exterior.
- the circumferential surface 105 can include structure configured to cooperate with and/or interact with structure on the interior surface 70 of the non-pneumatic tire 24 .
- the structure on the interior surface 70 can include the textured profile 86 , such as the axial ridges 88 located on the inner circumferential ring 26 .
- the rim 90 defines a cavity 106 on the circumferential surface 105 that is configured to slide over the axial ridges 88 as the in-board rim half 94 and the out-board rim half 96 are assembled to form the complete rim 90 .
- This arrangement provides a physical interference between cavity side walls 108 and the axial ridges 88 to enable transfer of rotational motion from the rim 90 to the non-pneumatic tire 24 .
- the rotational force provided by the power supply rotates the rim 90 , and the rotational force is then transferred through the physical interference to rotate the non-pneumatic tire 24 .
- Physical interference between the cavity side walls 108 and the axial ridges 88 can prevent relative rotational motion between the rim 90 and the non-pneumatic tire 24 . It is to be understood that the geometries and locations of the axial ridges 88 and the cavities 106 can be designed and manufactured to adequately transfer rotational power for any number of anticipated workloads, torques, environmental conditions, etc.
- the axial ridges 88 and the cavities 106 can be located in sections around the interior surface 70 separated by distances having no cavities or axial ridges. As shown in FIGS. 4 and 6-7 , the axial ridges 88 can be located at regular intervals continuously around the interior surface 70 . In this instance, the cavities 106 can be designed accordingly for proper interaction and/or cooperation with the axial ridges 88 . Furthermore, these examples are not meant to be limiting, and any suitable arrangement of axial ridges 88 and cavities 106 can be used.
- the non-pneumatic tire assembly 20 further includes a hub 110 which is removably connected to the rim 90 .
- the hub 110 includes a central portion 114 and a lug 116 .
- the hub 110 can be constructed of any suitable material, including, but not limited to: cast and machined materials, forged materials, powdered metal materials, etc.
- the central portion 114 and the lug 116 can be formed of a single, unitary piece.
- the central portion 114 can define a central aperture 118 for interaction with an axle (not shown) as shown in FIG. 1 .
- the central aperture 118 can have a non-circular cross-section, such as having a flat side 120 such that the aperture is “D”-shaped.
- the central aperture 118 can have a “double-D” shape.
- the axle can have a corresponding cross-sectional shape such that rotation of the axle urges rotation of the hub 110 .
- the rim 90 includes a ridge 124 , and a valley 126 arranged radially around the rim 90 .
- the valley 126 can be the previously described vertical plane 104 , and each valley 126 is separated from adjacent valleys 126 by the ridge 124 .
- the ridge 124 from the in-board rim half 94 is aligned with the ridge 124 from the out-board rim half 96 to form a cavity 128 between the two rim halves 94 , 96 .
- the lug 116 can be configured to rest within the cavity 128 and interact with the cavity 128 in order to limit rotation of the hub 110 relative to the rim 90 .
- This arrangement provides a physical interference between cavity side walls 108 and the lug 116 to enable transfer of rotational motion from the hub 110 to the rim 90 .
- the rotational force provided by the power supply rotates the hub 110 , and the rotational force is then transferred through the physical interference to rotate the rim 90 , which in turn transfers rotational force to the non-pneumatic tire 24 .
- Physical interference between the cavity side walls 108 and the lugs 116 can prevent relative rotational motion between the hub 110 and rim 90 . It is to be understood that the geometries and locations of the cavity side walls 108 and the lugs 116 can be designed and manufactured to adequately transfer rotational power for any number of anticipated workloads, torques, environmental conditions, etc.
- the hub 110 is sandwiched between the two pieces of the rim 90 , and secure the entire non-pneumatic tire assembly 20 together.
- the two pieces of the rim i.e., rim halves 94 , 96
- the hub 110 snap into place to capture the non-pneumatic tire 24 and the hub 110 .
- the geometry of the rim halves 94 , 96 and the non-pneumatic tire 24 can be calculated and manufactured such that a first width 130 of the rim 90 is shorter than a second width 134 of the non-pneumatic tire 24 thereby enabling the assembled rim 90 to exert an axial compression force on the non-pneumatic tire 24 .
- the axial compression force can compress the non-pneumatic tire 24 axially from the dashed outline to the solid outline shown in FIG. 9 .
- the axial compression force can be used to pre-load the non-pneumatic tire 24 such that the circumference of the non-pneumatic tire 24 is “crowned” between the two rim halves 94 , 96 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A non-pneumatic tire assembly includes a non-pneumatic tire. The non-pneumatic tire includes an inner circumferential ring and an outer circumferential ring defining an annular space and a cylindrical space inside the inner circumferential ring. A plurality of partitions connect the circumferential rings within the annular space. A ground-contacting tread is located on the outer circumferential ring. A rim, including a plurality of pieces, is located within the cylindrical space. The non-pneumatic tire assembly further includes a hub that is removably connected to the rim.
Description
- This application claims the benefit of U.S. Provisional Application No. 62/108,112, filed Jan. 27, 2015, the entire disclosure of which is hereby incorporated herein by reference.
- BACKGROUND
- 1. Field of the Disclosure
- The present application is directed to a non-pneumatic tire and a wheel assembly using a non-pneumatic tire, and more particularly, to a non-pneumatic tire for outdoor power equipment.
- 2. Description of Related Art
- Many outdoor power equipment devices are provided with pneumatic, or air-filled, tires made of an airtight inner core filled with pressurized gas. A tread, usually reinforced with steel belting or other materials, covers this inner core and provides an area which contacts the traction surface. At times, these tires are damaged or otherwise caused to be deflated during shipment. At other times, these tires may lose pressure after remaining in a single location for extended periods, such as a snow thrower stored in a shed during summer months. This loss of pressure requires correction or replacement by the equipment user or by a member of the equipment supply chain. This can lead to costly warranty issues.
- Furthermore, many power equipment users do not set and maintain proper tire pressure. This may result in improper machine orientation and/or spatial attitude, thereby creating situations which could result in loss of control or stability of the power equipment device. Additionally, many pneumatic tires are designed to have good traction in an axial direction as well as the fore/aft directions. Accordingly, improvements to power equipment tires and wheel assemblies are desired.
- The following presents a simplified summary in order to provide a basic understanding of some example aspects of the disclosure. This summary is not an extensive overview. Moreover, this summary is not intended to identify critical elements of the disclosure nor delineate the scope of the disclosure. The sole purpose of the summary is to present some concepts in simplified form as a prelude to the more detailed description that is presented later.
- According to one aspect, the subject application involves a non-pneumatic tire assembly including a non-pneumatic tire. The non-pneumatic tire includes an inner circumferential ring and an outer circumferential ring defining an annular space between the circumferential rings. The inner circumferential ring also defines a cylindrical space inside the inner circumferential ring. The non-pneumatic tire also includes a plurality of partitions within the annular space. The partitions connect the circumferential rings. The non-pneumatic tire further includes a ground-contacting tread located on the outer circumferential ring. The non-pneumatic tire assembly also includes a rim. The rim includes a plurality of pieces, and the rim is located within the cylindrical space. The non-pneumatic tire assembly further includes a hub. The hub is removably connected to the rim.
- According to another aspect, the subject application involves a non-pneumatic tire. The non-pneumatic tire includes an inner circumferential ring and an outer circumferential ring defining an annular space between the circumferential rings. The inner circumferential ring also defines a cylindrical space inside the inner circumferential ring. The non-pneumatic tire also includes a plurality of partitions within the annular space. The partitions connect the circumferential rings. The non-pneumatic tire further includes a ground-contacting tread located on the outer circumferential ring.
- The foregoing and other aspects of the present disclosure will become apparent to those skilled in the art to which the present disclosure relates upon reading the following description with reference to the accompanying drawings, in which:
-
FIG. 1 is a perspective view of a non-pneumatic tire assembly according to an aspect of the present disclosure; -
FIG. 2 is an exploded view of the non-pneumatic tire assembly ofFIG. 1 ; -
FIG. 3 is an elevation side view of a non-pneumatic tire showing “V-shaped” partitions connected to an outer circumferential ring between tire tread ridges; -
FIG. 4 is similar toFIG. 3 , having partitions connected to the outer circumferential ring directly opposite the tire tread ridges; -
FIG. 5 is a perspective view of a non-pneumatic tire having wishbone-shaped partitions; -
FIG. 6 is an elevation view of a non-pneumatic tire having “U-shaped” partitions; -
FIG. 7 is an elevation view of a non-pneumatic tire having “O-shaped” partitions; -
FIG. 8 is a partial elevation view of a non-pneumatic tire section having oval-shaped partitions; -
FIG. 9 is a cross-section view of the non-pneumatic tire assembly taken along line 9-9 ofFIG. 1 ; and -
FIG. 10 is an elevation view of a non-pneumatic tire assembly showing elastic deformation while placed on a snow-covered surface. - Example embodiments that incorporate one or more aspects of the present disclosure are described and illustrated in the drawings. These illustrated examples are not intended to be a limitation on the present disclosure. For example, one or more aspects of the present disclosure can be utilized in other embodiments and even other types of devices. Moreover, certain terminology is used herein for convenience only and is not to be taken as a limitation on the present disclosure. Still further, in the drawings, the same reference numerals are employed for designating the same elements.
- The described apparatus provides for a non-pneumatic tire and wheel configuration, herein called “non-pneumatic tire,” which can improve certain traction aspects while reducing the need for conventional service and maintenance. The non-pneumatic tire may be attached to both pedestrian or “walk-behind” and “riding” outdoor power equipment, including, but not limited to, walk-behind mowers and snow throwers, riding mowers and snow blowers, lawn and garden tractors, and utility vehicles. However, the remainder of the disclosure will describe the non-pneumatic tire assembly as used on a snow thrower.
- Turning to
FIG. 1 , a perspective view of an exemplary embodiment of anon-pneumatic tire assembly 20 includes anon-pneumatic tire 24. The non-pneumatic tire includes an innercircumferential ring 26 and an outercircumferential ring 28. Together, the innercircumferential ring 26 and the outercircumferential ring 28 define anannular space 30 between thecircumferential rings cylindrical space 34 inside the innercircumferential ring 26. The non-pneumatic tire also includes a plurality ofpartitions 36 within theannular space 30, extending between and connecting the twocircumferential rings partitions 36 can vary, as will be described below, however, regardless of the geometry, thepartitions 36 are designed to support the weight of the outdoor power equipment and transfer that weight to a riding surface (e.g., ice, snow, earth, pavement, etc.) Additionally, the design of thepartitions 36 enables thepartitions 36 to resist permanent (plastic) deformation while enabling some amount of temporary (elastic) deformation as thenon-pneumatic tire assembly 20 rolls and supports the weight of the outdoor power equipment. In one example, thepartitions 36 are non-radial, meaning that thepartitions 36 are not straight-line segments that lie on any radius of thenon-pneumatic tire 24. - The
partitions 36 can include any number of suitable generalized shapes from the vantage point of an out-board side 38 or an in-board side 40 of thenon-pneumatic tire 24 in a direction parallel to theaxis 42 of thenon-pneumatic tire assembly 20. The generalized shape of thepartitions 36 can remain constant through the axial width of thenon-pneumatic tire 24. As shown inFIGS. 1, 2, and 5 , thepartitions 36 can have a generalized shape of a wishbone. Thenon-pneumatic tire 24 ofFIGS. 3 and 4 includespartitions 36 having a generalized shape of a “V.”FIG. 6 shows thepartitions 36 having a U-shape, whileFIG. 7 shows thepartitions 36 in an “O” or a circle shape.FIG. 8 shows thepartitions 36 having a generalized shape of an oval. Of course, thepartitions 36 can include these generalized shapes and/or combinations of these shapes in patterns that can repeat around theannular space 30. In other examples, thepartitions 36 can have an ogive or hypocycloid shape that repeats around theannular space 30. - The
non-pneumatic tire 24 further includes a ground-contactingtread 44 located on the outercircumferential ring 28. The ground-contactingtread 44 is located on anexterior side 46 of the outercircumferential ring 28. In one example, the ground-contactingtread 44 can include a plurality ofridges 48 extending axially across theexterior side 46 of the outercircumferential ring 28. Theridges 48 can include asingle ridge portion 50 on one axial side of the outercircumferential ring 28 and asplit ridge portion 54 on the other axial side of the outercircumferential ring 28. Thesplit ridge portion 54 can define aslot 56 between the twopeaks 58 of thesplit ridge portion 54. - In one example, the described
ridge 48 including thesingle ridge portion 50 and thesplit ridge portion 54 can extend to anysuitable radial distance 60 from the outercircumferential ring 28. Thisdistance 60 can vary along the axial width of thenon-pneumatic tire 24. For example, as shown inFIG. 9 , theridges 48 can include aradial distance 60A such that the center of theridge 48 along the axial width is greater than theradial distance 60B at the ends of theridge 48. This arrangement of avaried radial distance 60 creates apeaked elevation 64 away from the outercircumferential ring 28. This peakedelevation 64 and thesingle ridge portion 50 and splitridge portion 54 can develop higher fore-aft traction in thenon-pneumatic tire 24 while reducing the sideways (axial) fraction of thenon-pneumatic tire 24. This can ease the operation of sliding outdoor power equipment (e.g., a snow thrower) sideways and/or turning the snow thrower. In one example, thepeaked elevation 64 is located at about the axial center point of the plurality ofridges 48. - Returning to
FIG. 1 ,adjacent ridges 48 can alternate orientation such that thesplit ridge portion 54 of asingle ridge 48 is located on the in-board side 40 of thenon-pneumatic tire 24 while thesplit ridge portion 54 of theadjacent ridge 48 in either direction around the outercircumferential ring 28 is located on the out-board side 38 of thenon-pneumatic tire 24. This alternating arrangement ofridges 48 can enable the non-pneumatic tire 24 (and the non-pneumatic tire assembly 20) to be “omni-directional,” meaning that thenon-pneumatic tire 24 has equal traction in the fore and aft operating directions. Moreover, thenon-pneumatic tire 24 can be mounted to the remainder of thenon-pneumatic tire assembly 20 whether the in-board side 40 is facing toward the outdoor power equipment or away from the outdoor power equipment. This omni-directional feature can ease assembly and maintenance of the outdoor power equipment. The described ridge orientation also enables thenon-pneumatic tire 24 to be molded in a simple mold or die that does not require any “action” or moving parts in the die. In other words, thenon-pneumatic tire 24 is molded in a relatively simple, axial motion die. - Additionally, each
ridge 48 includes a height dimension and a width dimension. These dimensions can be calculated, constructed, and tested to resist deformation under particular circumstances such as supporting the weight of the outdoor power equipment for extended periods of time while in a single position. In an even more particular circumstance, theridges 48 can resist deformation while supporting the weight of the outdoor power equipment for extended periods of time in a single position at increased temperature, such as shed storage during a summer season. In one example, the aspect ratio of eachridge 48 is between about 1:1 to about 2:1. More particularly, the aspect ratio of eachridge 48 is between about a value slightly larger than 1:1 to no larger than 2:1. Additionally, it is to be understood that the tread can take any suitable shape or form. The shown examples of the ridges are but one example, and are not meant to be limiting. - It is to be appreciated that the location of the
partitions 36, regardless of their generalized shape(s), can be located at various positions relative to theridges 48. For example,FIG. 3 shows the “V” shapedpartitions 36 connecting with the outercircumferential ring 28 at approximately a midpoint between eachridge 48. Alternatively, thepartitions 36 can be shifted circumferentially such that they connect with the outercircumferential ring 28 at positions directly opposite theridges 48, as shown inFIG. 4 . These locations can be calculated and selected to develop preferential load bearing and/or deflection characteristics in thenon-pneumatic tire 24. Additionally, theridges 48 can be spaced at any selected interval to develop preferential deflection and/or traction characteristics. In one particular example, theridges 48 are spaced approximately one-inch apart on the circumference of the outercircumferential ring 28. - Returning to
FIG. 9 , thepartitions 36 can definearcuate sides 66 on a sidewall area that extend in an axial direction relative to the edges of the innercircumferential ring 26 and the outercircumferential ring 28. Thesearcuate sides 66 can act as built-in wear surfaces and/or bumpers for a snow thrower. For example, as an operator guides the snow thrower along a path having a border such as a curb, thearcuate sides 66 can contact the curb prior to other portions of the snow thrower. The operator can then “drive by feel” by keeping thearcuate sides 66 in contact with the curb or other physical structure. Additionally, thearcuate sides 66 can prevent contact wear and/or damage to other portions of the non-pneumatic tire assembly 20 (e.g., the rim) and the snow thrower. In one example, thearcuate sides 66 can include acurve 68 that extends to theridges 48 of the ground-contactingtread 44. - The
non-pneumatic tire 24 can be constructed of any suitable material. In one example, thenon-pneumatic tire 24 is formed from a plastic containing a rubber filler material. In another example, thenon-pneumatic tire 24 is formed from a thermoset polymer. Additionally, thenon-pneumatic tire 24 material can be selected to optimize tire performance. For example, the material can achieve a balance between traits of solidity to promote tire strength and resistance to permanent deformation during relatively hot long-term storage (e.g., a snow thrower in a shed during summer months), and traits of flexibility to promote tire traction and an ability to shed snow collected in the ground-contactingtread 44 as it rolls along a snow-coveredsurface 70. - For example, turning to
FIG. 10 , the ground-contactingtread 44 of thenon-pneumatic tire 24 contacts the snow/ice covered surface 70 (e.g., driveway, sidewalk, etc.). The weight of the snow thrower causes elastic deformation of thenon-pneumatic tire 24 such that a plurality ofridges 48 contact the snow/ice coveredsurface 70 at any given time. This deformation causes theindividual ridges 48 to deform toward one another and decrease thedistance 74 between theridges 48. This can trap snow, ice, and other objects between theridges 48 of the ground-contactingtread 44. The same is true for thedistance 76 between the twopeaks 58 of thesplit ridge portion 54. However, as thenon-pneumatic tire assembly 20 continues to roll along thesurface 70 in the direction ofarrow 77, a portion of thenon-pneumatic tire 24 leaves contact with thesurface 70. As the ground-contactingtread 44 leaves the surface, it is no longer bearing the weight of the snow thrower, and reverts back to its original formation; increasing the distances betweenindividual ridges 48 and the twopeaks 58 of thesplit ridge portion 54. This reversion tends to urge collected material (e.g., snow, ice, etc.) out and away from the spaces between theindividual ridges 48 and the twopeaks 58. Removal of collected material can enable improved traction for thenon-pneumatic tire assembly 20 when compared to other tire assemblies that do not automatically remove collected material from the tread. - In one example, the
non-pneumatic tire 24 can be formed in a single, unitary piece as shown inFIGS. 1-7 . In another example, thenon-pneumatic tire 24 can comprise a plurality of generallyarcuate sections 78 as shown inFIG. 8 . A number ofsuch sections 78 can be assembled to form a complete, cylindricalnon-pneumatic tire 24. In this example, eacharcuate section 78 can include aslot 80 at one end and atab 84 at the other end. Thetabs 84 andslots 80 of adjacentarcuate sections 78 can be urged into mating arrangement to form a cylindricalnon-pneumatic tire 24. - Whether formed of a single, unitary body or from several
arcuate sections 78, thenon-pneumatic tire 24 can be injection molded. In either case, the selected geometry of thenon-pneumatic tire 24 can be configured such that the tooling used to create thenon-pneumatic tire 24 does not include any slides or “action” as previously noted. - As shown in
FIGS. 2-8 , thenon-pneumatic tire 24 can define atextured profile 86 on aninterior surface 70. Thetextured profile 86 can include any suitable structure to enable transmission of rotational force from a power supply, through any intermediate structure, to thenon-pneumatic tire 24 such that rotational motion developed at the power supply can urge rotational motion of thenon-pneumatic tire 24. In the shown examples, thetextured profile 86 consists ofaxial ridges 88 on aninterior surface 70 of the innercircumferential ring 26. It is to be appreciated that various intermediate structures may be included between the power supply and thenon-pneumatic tire 24, including, but not limited to: axles, transmissions, etc. - Returning to
FIG. 2 , thenon-pneumatic tire assembly 20 also includes arim 90. Therim 90 includes a plurality of pieces. In the shown examples, therim 90 includes an in-board rim half 94 and an out-board rim half 96, however, this example is not meant to be limiting. However many pieces there are, therim 90 is located within thecylindrical space 34 inside the innercircumferential ring 26. - The in-
board rim half 94 and the out-board rim half 96 can be fastened together by any suitable means to form acomplete rim 90. In one example, the in-board rim half 94 and the out-board rim half 96 are separably attached usingfasteners 98. Thefasteners 98 can pass throughapertures 100 defined in the in-board rim half 94 and the out-board rim half 96. Of course, theapertures 100 in the in-board rim half 94 can be aligned with theapertures 100 of the out-board rim half 96. In one example, theapertures 100 can be defined in a portion of therim half vertical plane 104. In this example, thevertical plane 104 from the in-board rim half 94 can be aligned with and even be in contact with thevertical plane 104 of the out-board rim half 96. Contact between thevertical planes 104 can enhance the strength of the fastened connection between the rim halves 94, 96 and minimize any deformation of either rimhalf - As shown in
FIG. 2 , therim 90 can include acircumferential surface 105 on its exterior. Thecircumferential surface 105 can include structure configured to cooperate with and/or interact with structure on theinterior surface 70 of thenon-pneumatic tire 24. As previously described, the structure on theinterior surface 70 can include thetextured profile 86, such as theaxial ridges 88 located on the innercircumferential ring 26. In one example, therim 90 defines acavity 106 on thecircumferential surface 105 that is configured to slide over theaxial ridges 88 as the in-board rim half 94 and the out-board rim half 96 are assembled to form thecomplete rim 90. - This arrangement provides a physical interference between
cavity side walls 108 and theaxial ridges 88 to enable transfer of rotational motion from therim 90 to thenon-pneumatic tire 24. As such, the rotational force provided by the power supply rotates therim 90, and the rotational force is then transferred through the physical interference to rotate thenon-pneumatic tire 24. Physical interference between thecavity side walls 108 and theaxial ridges 88 can prevent relative rotational motion between therim 90 and thenon-pneumatic tire 24. It is to be understood that the geometries and locations of theaxial ridges 88 and thecavities 106 can be designed and manufactured to adequately transfer rotational power for any number of anticipated workloads, torques, environmental conditions, etc. - As shown in
FIGS. 1-3, 5, and 8 , theaxial ridges 88 and thecavities 106 can be located in sections around theinterior surface 70 separated by distances having no cavities or axial ridges. As shown inFIGS. 4 and 6-7 , theaxial ridges 88 can be located at regular intervals continuously around theinterior surface 70. In this instance, thecavities 106 can be designed accordingly for proper interaction and/or cooperation with theaxial ridges 88. Furthermore, these examples are not meant to be limiting, and any suitable arrangement ofaxial ridges 88 andcavities 106 can be used. - The
non-pneumatic tire assembly 20 further includes ahub 110 which is removably connected to therim 90. In the shown example ofFIG. 2 , thehub 110 includes acentral portion 114 and alug 116. Thehub 110 can be constructed of any suitable material, including, but not limited to: cast and machined materials, forged materials, powdered metal materials, etc. In one example, thecentral portion 114 and thelug 116 can be formed of a single, unitary piece. - In one example, the
central portion 114 can define acentral aperture 118 for interaction with an axle (not shown) as shown inFIG. 1 . Thecentral aperture 118 can have a non-circular cross-section, such as having aflat side 120 such that the aperture is “D”-shaped. In another example, thecentral aperture 118 can have a “double-D” shape. The axle can have a corresponding cross-sectional shape such that rotation of the axle urges rotation of thehub 110. - In the shown example of
FIG. 2 , therim 90 includes aridge 124, and avalley 126 arranged radially around therim 90. Thevalley 126 can be the previously describedvertical plane 104, and eachvalley 126 is separated fromadjacent valleys 126 by theridge 124. When the tworim halves ridge 124 from the in-board rim half 94 is aligned with theridge 124 from the out-board rim half 96 to form acavity 128 between the tworim halves lug 116 can be configured to rest within thecavity 128 and interact with thecavity 128 in order to limit rotation of thehub 110 relative to therim 90. - This arrangement provides a physical interference between
cavity side walls 108 and thelug 116 to enable transfer of rotational motion from thehub 110 to therim 90. As such, the rotational force provided by the power supply rotates thehub 110, and the rotational force is then transferred through the physical interference to rotate therim 90, which in turn transfers rotational force to thenon-pneumatic tire 24. Physical interference between thecavity side walls 108 and thelugs 116 can prevent relative rotational motion between thehub 110 andrim 90. It is to be understood that the geometries and locations of thecavity side walls 108 and thelugs 116 can be designed and manufactured to adequately transfer rotational power for any number of anticipated workloads, torques, environmental conditions, etc. - As can be seen in
FIG. 2 , as the tworim halves hub 110 is sandwiched between the two pieces of therim 90, and secure the entirenon-pneumatic tire assembly 20 together. In one example, the two pieces of the rim (i.e., rim halves 94, 96) snap into place to capture thenon-pneumatic tire 24 and thehub 110. Returning toFIG. 9 , the geometry of the rim halves 94, 96 and thenon-pneumatic tire 24 can be calculated and manufactured such that a first width 130 of therim 90 is shorter than a second width 134 of thenon-pneumatic tire 24 thereby enabling the assembledrim 90 to exert an axial compression force on thenon-pneumatic tire 24. The axial compression force can compress thenon-pneumatic tire 24 axially from the dashed outline to the solid outline shown inFIG. 9 . Additionally, the axial compression force can be used to pre-load thenon-pneumatic tire 24 such that the circumference of thenon-pneumatic tire 24 is “crowned” between the tworim halves - While this disclosure has been written in conjunction with the specific embodiments described above, it is evident that many alternatives, combinations, modifications and variations are apparent to those skilled in the art. Accordingly, the described embodiments of this disclosure, as set forth above are intended to be illustrative only, and not in a limiting sense. Various changes can be made without departing from the spirit and scope of this disclosure. Combinations of the above embodiments and other embodiments will be apparent to those of skill in the art upon studying the above description and are intended to be embraced therein. Therefore, the scope of the present disclosure is defined by the appended claims, and all devices, processes, and methods that come within the meaning of the claims, either literally or by equivalence, are intended to be embraced therein. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.
Claims (20)
1. A non-pneumatic tire assembly, said non-pneumatic tire assembly comprising:
a non-pneumatic tire, said non-pneumatic tire comprising:
an inner circumferential ring and an outer circumferential ring defining an annular space between said circumferential rings and a cylindrical space inside said inner circumferential ring;
a plurality of partitions within said annular space, wherein said partitions connect said circumferential rings;
a ground-contacting tread located on said outer circumferential ring;
a rim, said rim comprises a plurality of pieces, and said rim is located within said cylindrical space; and
a hub, said hub is removably connected to said rim.
2. The non-pneumatic tire assembly according to claim 1 , wherein said hub is sandwiched between said two pieces of said rim.
3. The non-pneumatic tire assembly according to claim 1 , wherein said rim further comprises a ridge and a valley, and said hub further comprises a lug,
wherein said ridge from one of said two pieces of said rim is aligned with said ridge from the other of said two pieces of said rim to form a cavity between said two pieces of said rim,
wherein said lug is configured to interact with said cavity in order to limit rotation of said hub relative to said rim.
4. The non-pneumatic tire assembly according to claim 1 , wherein said rim further comprises a circumferential surface, and said rim defines a cavity on said circumferential surface configured to interact with structure on said non-pneumatic tire to enable transfer of rotational motion from said rim to said non-pneumatic tire.
5. The non-pneumatic tire assembly according to claim 1 , wherein said hub defines a non-circular aperture configured to interact with an associated wheel axle.
6. The non-pneumatic tire assembly according to claim 1 , wherein said two pieces of said rim snap into place to capture said non-pneumatic tire and said hub.
7. The non-pneumatic tire assembly according to claim 1 , further comprising a fastener, wherein said fastener attaches one of said two pieces of said rim to the other of said two pieces of said rim, thereby securing the entire non-pneumatic tire assembly together.
8. The non-pneumatic tire assembly according to claim 1 , wherein a first width of said rim is shorter than a second width of said non-pneumatic tire thereby enabling application of axial force to said non-pneumatic tire.
9. A non-pneumatic tire, said non-pneumatic tire comprising:
an inner circumferential ring and an outer circumferential ring defining an annular space between said circumferential rings and a cylindrical space inside said inner circumferential ring;
a plurality of partitions within said annular space, wherein said partitions connect said circumferential rings; and
a ground-contacting tread located on said outer circumferential ring.
10. The non-pneumatic tire according to claim 9 , wherein said partitions are non-radial.
11. The non-pneumatic tire according to claim 9 , wherein said partitions have a generalized shape selected from the group consisting of a wishbone, an “O,” a “V,” a “U,” a circle, an oval, and combinations thereof that repeats around said annular space.
12. The non-pneumatic tire according to claim 9 , wherein said partitions have an ogive or hypocycloid shape that repeats around said annular space.
13. The non-pneumatic tire according to claim 9 , wherein said partitions define arcuate sides that extend in an axial direction relative to the edges of said circumferential rings.
14. The non-pneumatic tire according to claim 9 , wherein said ground-contacting tread comprises a plurality of ridges extending axially across an exterior surface of said outer circumferential ring.
15. The non-pneumatic tire according to claim 14 , wherein each ridge of said plurality of ridges includes a height dimension and a width dimension, wherein an aspect ratio of each ridge comprises a ratio of the height dimension to the width dimension, said aspect ratio of each ridge of said plurality of ridges is between about 1:1 to about 2:1
16. The non-pneumatic tire according to claim 14 , wherein said plurality of ridges comprise a peaked elevation at about the axial center point of the plurality of ridges.
17. The non-pneumatic tire according to claim 14 , wherein said plurality of ridges comprise a single ridge portion on one axial side of said outer circumferential ring and a split ridge portion on the other axial side of said outer circumferential ring.
18. The non-pneumatic tire according to claim 17 , wherein said adjacent ridges of said plurality of ridges can alternate orientation such that said split ridge portion of one of said plurality of ridges is located on an in-board side of said non-pneumatic tire while said split ridge portion of an adjacent ridge of said plurality of ridges is located on an out-board side of said non-pneumatic tire.
19. The non-pneumatic tire according to claim 9 , wherein said inner circumferential ring defines a textured profile on an interior surface to enable cooperation with a rim such that rotational motion of said rim urges rotational motion of said non-pneumatic tire.
20. The non-pneumatic tire according to claim 9 , wherein a plurality of generally arcuate sections are assembled to form said non-pneumatic tire.
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US29/539,200 USD792332S1 (en) | 2015-06-03 | 2015-09-11 | Non-pneumatic tire |
US29/546,275 USD785558S1 (en) | 2015-01-27 | 2015-11-20 | Non-pneumatic tire |
US29/546,279 USD784917S1 (en) | 2015-06-03 | 2015-11-20 | Non-pneumatic tire |
US29/546,281 USD792333S1 (en) | 2015-06-03 | 2015-11-20 | Non-pneumatic tire |
US29/546,285 USD782391S1 (en) | 2015-01-27 | 2015-11-20 | Non-pneumatic tire |
PCT/US2016/015055 WO2016123180A2 (en) | 2015-01-27 | 2016-01-27 | Wheel assemblies with non-pneumatic tires |
CA2974999A CA2974999A1 (en) | 2015-01-27 | 2016-01-27 | Wheel assemblies with non-pneumatic tires |
EP16703227.5A EP3250398B1 (en) | 2015-01-27 | 2016-01-27 | Wheel assemblies with non-pneumatic tires |
US15/782,406 US10899169B2 (en) | 2015-01-27 | 2017-10-12 | Wheel assemblies with non-pneumatic tires |
US15/809,510 US10703140B2 (en) | 2015-01-27 | 2017-11-10 | Wheel assemblies with non-pneumatic tires |
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US15/809,510 Continuation US10703140B2 (en) | 2015-01-27 | 2017-11-10 | Wheel assemblies with non-pneumatic tires |
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US29/546,275 Active USD785558S1 (en) | 2015-01-27 | 2015-11-20 | Non-pneumatic tire |
US15/809,510 Active 2035-10-15 US10703140B2 (en) | 2015-01-27 | 2017-11-10 | Wheel assemblies with non-pneumatic tires |
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US15/809,510 Active 2035-10-15 US10703140B2 (en) | 2015-01-27 | 2017-11-10 | Wheel assemblies with non-pneumatic tires |
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Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD782391S1 (en) * | 2015-01-27 | 2017-03-28 | Mtd Products Inc | Non-pneumatic tire |
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Also Published As
Publication number | Publication date |
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EP3250398A2 (en) | 2017-12-06 |
US20180086141A1 (en) | 2018-03-29 |
US10703140B2 (en) | 2020-07-07 |
USD782391S1 (en) | 2017-03-28 |
EP3250398B1 (en) | 2019-12-04 |
USD785558S1 (en) | 2017-05-02 |
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