CN113524983B - Tire with adjustable radial stiffness and method of manufacture - Google Patents

Tire with adjustable radial stiffness and method of manufacture Download PDF

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Publication number
CN113524983B
CN113524983B CN202110648042.6A CN202110648042A CN113524983B CN 113524983 B CN113524983 B CN 113524983B CN 202110648042 A CN202110648042 A CN 202110648042A CN 113524983 B CN113524983 B CN 113524983B
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China
Prior art keywords
hub
tire
turntable
elastic supporting
radial
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CN202110648042.6A
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Chinese (zh)
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CN113524983A (en
Inventor
徐婷
杨江林
许高
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Ji Hua Laboratory
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Ji Hua Laboratory
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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
    • B60C7/14—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/02—Solid tyres ; Moulds therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B19/00—Wheels not otherwise provided for or having characteristics specified in one of the subgroups of this group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • 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
    • B60B9/28—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces comprising resilient spokes with telescopic action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/62—Other vehicle fittings for cleaning
    • B60S1/66—Other vehicle fittings for cleaning for cleaning vehicle exterior
    • B60S1/68—Other vehicle fittings for cleaning for cleaning vehicle exterior for freeing wheels or tyres from foreign matter, e.g. wheel scrapers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Abstract

The invention relates to a tire with adjustable radial stiffness and a manufacturing method thereof; the tire with adjustable radial rigidity comprises an outer tire; a hub concentrically disposed inside the outer tire; the elastic supporting pieces are fixedly connected between the outer side of the hub and the inner side of the outer tire; and the radial adjusting device is arranged on the inner side of the hub and used for adjusting the outer diameter of the hub, wherein the radial rigidity of the tire is adjusted by correspondingly compressing or stretching the elastic supporting piece through adjusting the outer diameter of the hub. According to the tire, the size of the outer diameter of the hub is adjusted through the matching tool, the elastic supporting piece is compressed or stretched, and the radial rigidity of the tire is adjusted, so that the bearing performance of the tire is adjusted.

Description

Tire with adjustable radial stiffness and method of manufacture
Technical Field
The invention relates to the technical field of tires, in particular to a tire with adjustable radial stiffness and a manufacturing method thereof.
Background
The automobile tire contacts with the road surface, supports the automobile body, relieves the external impact, and ensures the driving performance of the automobile. Meanwhile, the automobile tire is often used in a complex road surface environment, so the automobile tire must have better bearing performance; in the technical field of tires, the bearing performance of the tire is often reflected by the radial rigidity of the tire, and a conventional pneumatic tire can adjust the radial rigidity by adjusting the tire pressure, but the radial rigidity of a general non-pneumatic tire cannot be adjusted for the second time due to the adoption of an integral injection molding manufacturing process, so that the bearing performance of the non-pneumatic tire cannot be adjusted.
Disclosure of Invention
The invention aims to provide a tire with adjustable radial rigidity, and aims to solve the technical problem of how to adjust the radial rigidity of a non-pneumatic tire.
To achieve the above object, a first aspect of the present invention provides a tire with adjustable radial stiffness, comprising: an outer tire casing; a hub concentrically disposed inside the outer tire; the elastic supporting pieces are fixedly connected between the outer side of the hub and the inner side of the outer tire; and the radial adjusting device is arranged on the inner side of the hub and used for adjusting the outer diameter of the hub, wherein the radial rigidity of the tire is adjusted by correspondingly compressing or stretching the elastic supporting piece through adjusting the outer diameter of the hub.
Preferably, the radial adjustment device comprises:
the supporting rod comprises a base plate, a plurality of supporting rods and a plurality of supporting rods, wherein the supporting rods are arranged on the outer side of the base plate along the circumferential direction;
the rotary disc is rotatably assembled with the chassis;
the hub pieces are arranged on the outer side of the rotating disc in an enclosing mode at intervals and connected with the rotating disc, and each hub piece corresponds to one supporting rod;
when the rotary disc and the chassis are relatively rotated, the hub plate extends or contracts along the radial direction of the rotary disc.
Preferably, a plurality of involute grooves arranged at intervals are formed in the rotating disc, and an involute protrusion is arranged on the connecting portion of each hub plate and matched with the involute grooves.
Preferably, the hub further comprises: the wheel hub comprises a cover plate, wherein a plurality of guide sliding grooves are formed in the inner side of the cover plate along the circumferential direction, and each guide sliding groove corresponds to one wheel hub piece.
Preferably, a sliding bearing is further arranged on the inner side of the cover plate; the inner side of the turntable is provided with a sliding shaft ring which is in clearance fit with the sliding bearing.
Preferably, a kidney-shaped hole is formed in the connecting portion of each hub plate.
Preferably, a rotation assisting structure is arranged on the rotary table and used for rotating the rotary table in a matched manner.
Preferably, the turntable is provided with a slag discharging structure, and the slag discharging structure is used for discharging impurities entering the turntable.
Preferably, the outer tyre comprises an outer ring and an inner ring; the outer ring is used for contacting with a road surface; the inner ring is provided with a plurality of mounting grooves which are arranged at intervals and used for connecting the radial outer ends of the elastic supporting pieces.
Preferably, the shape of the radially inner end or the radially outer end of the elastic support member includes any one of an i-shape, a zigzag shape, and a zigzag shape.
Preferably, the elastic support part comprises two types of contact surfaces, the part where the elastic support part is matched with the outer diameter surface of the hub is a first type of contact surface, and the part where the elastic support part is matched with the inner radial surface of the outer tire inner ring is a first type of contact surface; the matching position of the elastic supporting piece and the inner surface of the outer diameter of the hub is a second contact surface; the first contact surface of the elastic supporting part is in a compressed state, and the second contact surface of the elastic supporting part is in a tensioned state.
A second aspect of the present invention provides a method for manufacturing a tire with adjustable radial stiffness, comprising the steps of:
step S1, respectively forming a plurality of elastic supporting pieces through casting or injection molding or 3D printing processing;
step S2, connecting the inner ring and the outer ring through gluing, hot die pressing molding, injection molding or casting molding to form an outer tire;
step S3, fixedly connecting a plurality of hub plates, a chassis and a turntable to form a radial adjusting device;
step S4, fixedly connecting the radial adjusting device with a cover plate to form a hub;
step S5, connecting the plurality of elastic supporting pieces with the outer tire and the hub by means of embedding fit or gluing.
Preferably, the method further comprises the following steps: step S6, glue is smeared on the connection matching position between the elastic supporting piece and the hub, and glue is smeared on the connection matching position between the elastic supporting piece and the outer tire.
Preferably, the snap fit comprises any one of an interference, a transition or a clearance.
Preferably, step S5 further includes replacing the elastic supporting member with a different shape or length, and adjusting an included angle between the outer tire and the hub.
Preferably, when the number of the elastic supporting pieces is M, the adjusting angle range of the included angle between the outer tire and the hub is [ 0-360 °/M ].
The tire with adjustable radial rigidity in the invention comprises: the wheel comprises an outer tire, a hub, an elastic supporting piece and a radial adjusting device; the radial rigidity of the tire is adjusted without being disassembled, the outer diameter of the hub is adjusted by a matching tool, the elastic supporting piece is compressed or stretched, and the radial rigidity of the tire is adjusted, so that the bearing performance of the tire is adjusted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed and practical in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope.
FIG. 1 is a schematic perspective view of one embodiment of an adjustable radial stiffness tire of the present invention;
FIG. 2 is a side view of one embodiment of an adjustable radial stiffness tire of the present invention;
FIG. 3 is a perspective view of one embodiment of the hub of the present invention;
FIG. 4 is a schematic structural view of an exploded hub embodiment of the present invention;
FIG. 5 is a perspective, schematic structural view of one embodiment of the chassis of the present invention;
FIG. 6 is a perspective view of one embodiment of a hub plate of the present invention;
FIG. 7 is a side view of one embodiment of the turntable of the present invention;
FIG. 8 is a structural illustration of one embodiment of the involute grooves of this invention;
FIG. 9 is a schematic perspective view of one embodiment of a cover plate of the present invention;
FIG. 10 is a front elevational view of one embodiment of the outer tire of the present invention;
FIG. 11 is a schematic perspective view of one embodiment of the resilient support of the present invention;
FIG. 12 is a graph of material stress strain for one embodiment of the resilient support of the present invention;
FIG. 13 is an explanatory view of one embodiment of the method of manufacturing a tire of the present invention;
description of reference numerals: 201. an outer tire casing; 202. an elastic support member; 203. a hub; 201A, an outer ring; 201B, an inner ring; 201Ba, mounting grooves; 202A, a first type contact surface; 202B, a second type contact surface; 203A, hub plates; 203B, a chassis; 203C, a cover plate; 203D, a nut; 203E, bolts; 203F, a turntable; 203Aa, a first mating face; 203Ab, second mating surface; 203Ac, a third mating surface; 203Ad, kidney hole; 203Ae, involute protrusions; 203Af, hub plate connection part; 203Ba, fastening holes; 203Bb, hub mounting hole: 203Bc, supporting rods: 203Ca, sliding bearing; 203Cb, through hole; 203Cc, a guide chute; 203Fa and an involute groove; 203Fb and a slag discharge hole; 203Fc, gear teeth; 203Fd, sliding collar.
Detailed Description
It should be noted that the specific structural and functional details disclosed herein are merely representative and are intended to describe example embodiments of the present invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is explained in further detail below with reference to the figures and alternative embodiments.
In one embodiment, as shown in fig. 1-2, a tire with adjustable radial stiffness, comprises: an outer tire casing 201; a hub 203 concentrically disposed inside the outer tire 201; a plurality of elastic supporting pieces 202 fixedly connected between the outer side of the hub 203 and the inner side of the outer tire 201; and a radial adjusting device arranged on the inner side of the hub 203 and used for adjusting the outer diameter of the hub 203, wherein the radial rigidity of the tire is adjusted by correspondingly compressing or stretching the elastic supporting piece 202 by adjusting the outer diameter of the hub 203.
The outer side of the outer tire 201 is used for contacting with a road surface, a plurality of elastic supporting pieces 202 are distributed between the outer side of the hub 203 and the inner side of the outer tire 201 at intervals, the radial outer ends of the elastic supporting pieces 202 are fixedly connected with the inner side of the outer tire 201, the radial inner ends of the elastic supporting pieces are fixedly connected with the outer side of the hub 203, and the elastic supporting pieces 202 have certain supporting performance and elastic performance, so that the elastic supporting pieces have certain bearing performance and deformation capacity, a radial adjusting device for adjusting the outer diameter of the hub 203 is arranged on the inner side of the hub 203, when the outer diameter of the hub 203 is increased or reduced, the elastic supporting pieces 202 are compressed or stretched, the overall radial rigidity of the tire is reduced or increased, and the bearing performance of the tire is adjusted.
Further, the radial adjustment device includes: the outer side of the chassis 203B is circumferentially provided with a plurality of support rods 203 Bc; a turntable 203F rotatably assembled with the chassis 203B; a plurality of hub pieces 203A which are arranged at intervals around the outer side of the rotating disc 203F and connected with the rotating disc 203F, wherein each hub piece 203A corresponds to one support rod 203 Bc; when the turntable 203F and the chassis 203B are relatively rotated, the hub plate 203A is extended or contracted in the radial direction of the turntable 203F.
In an embodiment, as shown in fig. 3 to 6, a plurality of support rods 203Bc are circumferentially arranged on the outer side of the chassis 203B for fixedly supporting the turntable 203F, and each support rod 203Bc corresponds to one hub plate 203A; a fastening hole 203Ba is reserved at the end part of each support rod 203Bc and is used for being matched with a bolt 203E to be fixedly connected, and a plurality of hub mounting holes 203Bb are reserved on the inner side of the chassis 203B; the hub pieces 203A are arranged at intervals along the periphery of the rotary disc 203F, and the connecting parts 203Af of the hub pieces 203A are fixedly connected with the rotary disc 203F; the gap between the hub plates 203A is used to connect the radially inner ends of the elastic supports 202; wherein the first mating face 203Aa, the second mating face 203Ab, and the third mating face 203Ac of the hub piece 203A are in contact mating with the radially inner end of the elastic support member 202.
When the turntable 203F and the chassis 203B are relatively rotated, the hub pieces 203A extend or contract along the radial direction of the turntable 203F, so as to increase or decrease the outer diameter of the hub 203, and further compress or stretch the elastic support 202, so that the radial rigidity of the whole tire is reduced or increased, and the load-bearing performance of the tire is adjusted.
Further, the turntable 203F is provided with a plurality of involute grooves 203Fa arranged at intervals, and the connecting portion 203Af of each hub plate 203A is provided with involute protrusions 203Ae which are matched with the involute grooves 203 Fa.
In an embodiment, as shown in fig. 6 to 8, an involute protrusion 203Ae is provided on the connecting portion 203Af of each hub plate 203A, and cooperates with an involute groove 203Fa on the turntable 203F to perform a fixed connection, so that the hub plate 203A can expand or contract along the radial direction of the turntable 203F, increase or decrease the outer diameter of the hub 203, and further compress or stretch the elastic support 202, resulting in a decrease or increase in the radial stiffness of the tire as a whole, thereby achieving an adjustment of the load-bearing performance of the tire.
The structural form and the number of the involute projections 203Ae and the involute grooves 203Fa are not particularly limited, and the above structures are only examples.
Further, the hub 203 further includes: the cover plate 203C has a plurality of guide chutes 203Cc provided on the inner side of the cover plate 203C in the circumferential direction, and each guide chute 203Cc corresponds to one hub plate 203A.
In one embodiment, as shown in fig. 9, a plurality of guide chutes 203Cc are circumferentially arranged on the inner side of the cover plate 203C, and each guide chute 203Cc corresponds to a connecting portion 203Af of one hub plate 203A for limiting the hub plate 203A to move only in the radial direction along the rotation disc 203F; a through hole 203Cb is reserved at the end part of each guide chute 203Cc and is used for fixedly connecting with a bolt 203E; the cover plate 203C is arranged to ensure that the hub plate 203A can move radially along the turntable 203F, and meanwhile, the connecting portion 203Af structure of the hub plate 203A can be effectively protected, so that the stability and reliability of the overall structure of the hub 203 are further improved.
Further, a sliding bearing 203Ca is arranged on the inner side of the cover plate 203C; a sliding collar 203Fd is provided inside the turntable 203F, and the sliding collar 203Fd is in clearance fit with the sliding bearing 203 Ca.
In one embodiment, as shown in fig. 7 and 9, the inner periphery of the cover plate 203C is provided with a sliding bearing 203Ca for supporting the turntable 203F to perform a rotating motion, and the inner side of the turntable 203F is provided with a sliding collar 203Fd for engaging with the sliding bearing 203 Ca; the clearance between the sliding bearing 203Ca and the sliding collar 203Fd ranges from 0.01 to 0.1; the sliding bearing 203Ca can provide support for the rotating disk 203F, and meanwhile, the position accuracy of the rotating disk 203F in the rotating process is maintained, the abrasion of the rotating disk 203F in the rotating process is reduced, and the service life of the rotating disk 203F is prolonged.
Further, each hub plate 203A is provided with a kidney-shaped hole 203 Ad.
In one embodiment, as shown in fig. 6, each hub plate 203A is provided with a kidney-shaped hole 203Ad for limiting the movement position of the hub plate 203A in the radial direction of the rotating disc 203F; meanwhile, the kidney-shaped hole 203Ad is also used as a bolt channel for fixedly connecting the hub plate 203A, the cover plate 203C and the chassis 203B; the arrangement of the waist-shaped holes 203Ad can improve the accuracy of the radial movement position of the hub piece 203A along the rotating disk and reduce errors, when the rotating disk 203F and the chassis 203B are relatively rotated, each hub piece 203A radially generates displacement change with the same distance along the rotating disk 203F, so that the radial uniform stress of each hub piece 203A along the rotating disk 203F is ensured, and the stress stability of the hub 203 is further improved.
Further, a rotation assisting structure is arranged on the rotary table 203F, and the rotation assisting structure is used for matching with the rotary table 203F.
In one embodiment, as shown in fig. 2 and 7, a plurality of gear teeth 203Fc are disposed around the outer periphery of the rotating disc 203F and spaced apart from each other for engaging with a gear tool to rotate the rotating disc 203F; set up teeth of a cogwheel 203Fc can provide the helping hand for rotating carousel 203F in-process, under the circumstances of not dismantling this tire, rotate the adjustment through using instrument cooperation teeth of a cogwheel 203Fc to carousel 203F simultaneously, the radial rigidity of the rapid adjustment wheel of person of facilitating the use to the bearing capacity of adjustment tire.
It should be noted that, the structural form, the relative position relationship and the number of the rotation assisting structure are not specifically limited, and the above structures are merely examples; in this embodiment, the rotation assisting structure only needs to provide assisting force when the rotating disc 203F is rotated, and the rotation assisting structure can be adjusted according to the specific requirements of the application situation when necessary.
Furthermore, a slag discharging structure is arranged on the turntable 203F and used for discharging impurities entering the turntable 203F.
In one embodiment, as shown in fig. 7, a plurality of slag discharge holes 203Fb are arranged around the outer peripheral edge of the turntable 203F at intervals, and each slag discharge hole 203Fb corresponds to an involute groove 203 Fa; through the centrifugal force that produces when the tire is rotatory, above arrange the setting of sediment hole 203Fb, can protect carousel 203F, produce centrifugal force and discharge the debris that get into carousel 203F through arranging sediment hole 203Fb when the tire is rotatory, avoid carousel 203F to take place phenomenons such as damage or card shell.
It should be noted that, the structural form, the relative position relationship and the number of the slag discharging structures are not specifically limited, and the above structures are only examples; in this embodiment, the deslagging structure only needs to be capable of discharging the impurities entering the turntable 203F by using the centrifugal force of the tire, and the deslagging and deconstruction can be adjusted according to the specific requirements of the application situation when necessary.
Further, the outer tire 201 includes an outer ring 201A and an inner ring 201B; the outer ring 201A is used for contacting with a road surface, and the inner ring 201B is provided with a plurality of mounting grooves 201Ba arranged at intervals and used for connecting the radial outer ends of the elastic supporting members 202.
In an embodiment, as shown in fig. 10, the inner ring 201B is provided with a plurality of mounting grooves 201Ba arranged at intervals for connecting the radial outer ends of the elastic supporting members 202, and the shape of the mounting grooves 201Ba matches with the shape of the radial outer ends of the elastic supporting members 202; the arrangement of the above mounting recess 201Ba enables the connection of the outer tire 201 with the radially outer end of the elastic support member 202 to be more secure and tight, providing structural stability of the entire tire.
Further, the shape of the radially inner end or the radially outer end of the elastic support member 202 includes any one of an i-shape, a zigzag shape, and a zigzag shape.
In an embodiment, as shown in fig. 11, the shape of the radial inner end and the radial outer end of the elastic supporting member 202 is i-shaped, and the contact surface has a certain radian, so that the radial outer end of the elastic supporting member 202 is more attached to the mounting groove 201Ba, and the radial inner end of the elastic supporting member 202 is more attached to the hub plate 203A; when the turntable 203F and the chassis 203B rotate relatively, the elastic support member contracts or extends along the radial direction, and the shape of the elastic support member 202 can effectively improve the structural strength of the elastic support member 202, so as to further improve the overall stress buffering performance of the tire.
As shown in fig. 11, the elastic support member 202 includes two types of contact surfaces, where the elastic support member 202 is engaged with the outer diameter surface of the hub 203, and where the elastic support member 202 is engaged with the radially inner surface of the outer tire inner ring 201B is a first type of contact surface 202A; the matching position of the elastic support part 202 and the outer diameter inner surface of the hub 203, and the matching position of the elastic support part 202 and the outermost clamping groove of the inner ring 201B of the outer tire casing along the radial direction is a second type contact surface 202B;
wherein the first type of contact surface 202A of the elastic support member 202 is under compression and the second type of contact surface 202B of the elastic support member 202 is under tension.
The invention also provides a manufacturing method of the tire with adjustable radial rigidity, which comprises the following steps:
step S1, respectively forming a plurality of elastic supporting pieces 202 through casting or injection molding or 3D printing processing;
step S2, connecting the inner ring 201B and the outer ring 201A by gluing or hot compression molding or injection molding or casting molding to form the outer tire 201;
step S3, fixedly connecting the plurality of hub pieces 203A, the chassis 203B, and the turntable 203F to form a radial adjustment device;
step S4, fixedly connecting the radial adjustment device to the cover plate 203C to form the hub 203;
in step S5, the plurality of elastic supports 202 are connected to the outer tire 201 and the hub 203 by insert fitting or gluing.
In an embodiment, the elastic supporting member 202 may be made of a polymer material with certain hardness and elasticity, such as: polyurethane material: CPU, TPU, etc.; rubber material: HNBR, NBR, EPDM, etc., to optimize the load bearing and elastic properties of the elastic support 202.
In an embodiment, the outer ring 201A or the inner ring 201B may be made of a high polymer material with high hardness, such as: rubber, polyurethane, etc. to optimize the support properties of the outer tire 201.
In one embodiment, the bolt 203E passes through the kidney-shaped hole 203Ad on the hub piece 203A and the fastening hole 203Ba on the chassis 203B, and the hub piece 203A, the chassis 203B and the turntable 203F are fixedly connected by matching with the nut 203D to form a radial adjusting device; then, the radial adjusting device is fixedly connected with the cover plate 203C through the through hole 203Cb on the cover plate 203C and the nut 203D, so that a hub 203 is formed; the fixed connection of each component of the hub 203 can be realized through a simple mechanical connection structure, and meanwhile, the damaged part of the components of the hub 203 can be conveniently detached and replaced.
In one embodiment, the radially outer end of the elastic support 202 is inserted into the mounting recess 201Ba of the inner ring 201B, and the radially inner end thereof is inserted into the gap between the hub pieces 203A, so as to connect the outer tire 201 and the hub 203; wherein the first mating surface 203Aa, the second mating surface 203Ab, and the third mating surface 203Ac of the hub piece 203A are in contact mating with the radially inner end of the elastic support member 202; here through embedding cooperation mode connection outer tire 201 and wheel hub 203, be different from the traditional mode of using the bonding of adhesive, more environmental protection.
In another embodiment, after glue is applied to the surfaces of the radially outer end and the radially inner end of the elastic support member 202, the radially outer end of the elastic support member 202 is connected to the mounting recess 201Ba of the inner ring 201B, and the radially inner end thereof is connected to the hub plate 203A to connect the outer tire 201 and the hub 203; at this time, the first mating surface 203Aa, the second mating surface 203Ab, and the third mating surface 203Ac of the hub piece 203A are fixedly connected to the radially inner end of the elastic support member 202 by glue; here, the outer tire 201 and the hub 203 are connected by using glue or adhesive, which has the advantage of mass production in the production process.
Further, the method for manufacturing a tire with adjustable radial stiffness further comprises: step S6, glue is applied to the connection fitting between the elastic support 202 and the hub 203, and glue is applied to the connection fitting between the elastic support 202 and the outer tire casing 201.
In one embodiment, after the radially outer end and the radially inner end of the elastic support member 202 are respectively connected with the outer tire 201 and the hub 203 through the insert fit, glue is applied to the connecting fit positions between the radially outer end and the inner ring 201B, and glue is applied to the connecting fit positions between the radially inner end and the first mating surface 203Aa, the second mating surface 203Ab and the third mating surface 203Ac of the hub piece 203A; glue is coated at the connection matching position, so that the connection strength of the outer tire 201, the elastic supporting part 202 and the wheel hub 203 can be increased, and the overall structural stability of the tire is improved.
Further, the insert fit includes any one of interference, transition, or clearance.
In an embodiment, the elastic supporting member 202 may be embedded into the gap between the mounting groove 201Ba of the inner ring 201B and the hub piece 203A in any one of interference, transition or gap, so as to be fully attached to the gap surface between the mounting groove 201Ba and the hub piece 203A, thereby increasing the structural stability of the whole tire and avoiding the shaking phenomenon of the tire during the driving process.
Compared with a non-pneumatic tire or an inflatable tire which is cast and integrally formed, the tire has more replaceability; meanwhile, the tire has good assembly performance, mass production is easy to realize, and large-scale equipment is not needed in the production and assembly process.
Further, step S5 includes replacing the elastic support members 202 with different shapes or lengths, and adjusting the included angle between the outer tire 201 and the hub 203. A material stress-strain curve diagram of the elastic support member 202 shown in fig. 12 is obtained through a large number of experiments, the abscissa is the material pre-strain of the elastic support member 202, and the ordinate is the material stress of the elastic support member 202, and the magnitude of the applied pre-stress can be determined by using the material stress-strain curve orientation, so that the elastic support member 202 is effectively adjusted, the radial stiffness of the whole tire is changed within a certain range, and the elastic support member 202 is prevented from being torn and damaged due to over-stress.
In one embodiment, as shown in fig. 13, according to the actual application requirement, during the manufacturing and assembling process of the tire, the elastic support member 202 with different lengths or shapes is replaced, and the included angle between the outer tire 201 and the hub 203 is adjusted, so as to adjust the radial stiffness of the whole tire during the manufacturing process of the tire.
Further, when the number of the elastic supporting members 202 is M, the adjustment angle of the included angle between the outer tire 201 and the hub 203 is [ 0-360 °/M ].
According to a large number of simulation experiments and experiences, when the number of the elastic supporting pieces 202 is M, the adjusting angle range of the included angle between the outer tire 201 and the hub 203 is 0-360 degrees/M; within this range of adjustment angles, the resilient support 202 maintains good load-bearing performance within its elastic deformation limits.
The invention has the advantages that the radial rigidity of the tire is adjusted without disassembling the tire, the outer diameter of the hub 203 is adjusted by a matching tool, the elastic support member 202 is compressed or stretched, and the radial rigidity of the tire is adjusted, so that the bearing performance of the tire is adjusted. Meanwhile, the manufacturing method of the tire is simple in process and reasonable in procedure, and large-scale equipment is not needed in the tire manufacturing and assembling process; the mechanical structure assembly can be fixed without using an adhesive, so that the mechanical structure assembly is more environment-friendly; and can be reused by replacing part of damaged parts quickly, thus saving cost.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the description and the principle of the present invention should be included in the protection scope of the present invention.
Although some specific embodiments of the present invention have been described in detail by way of examples, it will be appreciated by those skilled in the art that the above examples are intended to be illustrative only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the embodiments described above without departing from the scope of the present invention, which is defined by the appended claims.

Claims (13)

1. A tire having adjustable radial stiffness, comprising:
the outer tire comprises an outer ring and an inner ring, the outer ring is used for contacting with a road surface, and the inner ring is provided with a plurality of mounting grooves which are arranged at intervals and used for connecting the radial outer ends of the elastic supporting pieces;
a hub concentrically disposed inside the outer tire;
the elastic supporting pieces are fixedly connected between the outer side of the hub and the inner side of the outer tire;
the radial adjusting device is arranged on the inner side of the hub and used for adjusting the outer diameter of the hub, wherein the radial rigidity of the tire is adjusted by correspondingly compressing or stretching the elastic supporting piece through adjusting the outer diameter of the hub;
the shapes of the radial inner end and the radial outer end of the elastic supporting piece comprise any one of an I shape, a Chinese character 'tu' shape and a Chinese character 'shi' shape;
the elastic supporting piece comprises two types of contact surfaces, the matching position of the elastic supporting piece and the outer diameter surface of the hub is a first type of contact surface, and the matching position of the elastic supporting piece and the inner radial surface of the inner ring of the outer tire is a first type of contact surface; the matching position of the elastic supporting piece and the inner surface of the outer diameter of the hub is a second contact surface;
the first contact surface of the elastic supporting part is in a compressed state, and the second contact surface of the elastic supporting part is in a tensioned state.
2. An adjustable radial stiffness tire as in claim 1, wherein said radial adjustment device comprises:
the supporting rod comprises a base plate, a plurality of supporting rods and a plurality of supporting rods, wherein the supporting rods are arranged on the outer side of the base plate along the circumferential direction;
the rotary disc is rotatably assembled with the chassis;
the hub pieces are arranged on the outer side of the rotating disc in an enclosing mode at intervals and connected with the rotating disc, and each hub piece corresponds to one supporting rod;
when the turntable and the chassis are relatively rotated, the hub plate extends or contracts along the radial direction of the turntable.
3. A tire with adjustable radial stiffness as claimed in claim 2, wherein the turntable is provided with a plurality of involute grooves arranged at intervals, and an involute projection is provided on a connecting portion of each hub plate and the turntable, and is engaged with the involute grooves.
4. The adjustable radial stiffness tire of claim 2, wherein the hub further comprises:
the wheel hub comprises a cover plate, wherein a plurality of guide sliding grooves are formed in the inner side of the cover plate along the circumferential direction, and each guide sliding groove corresponds to one wheel hub piece.
5. Tire with adjustable radial stiffness according to claim 4, wherein the inside of the cover plate is further provided with a sliding bearing; the inner side of the turntable is provided with a sliding shaft ring which is in clearance fit with the sliding bearing.
6. The adjustable radial stiffness tire of claim 3, wherein a kidney hole is provided in the connecting portion of each hub plate.
7. An adjustable radial stiffness tire as in claim 2, wherein said turntable is provided with a rotational assist structure for cooperating to rotate said turntable.
8. The tire with adjustable radial stiffness of claim 2, wherein the turntable is provided with a slag discharge structure for discharging debris entering the turntable.
9. A method of manufacturing a tyre with adjustable radial stiffness, as claimed in any one of claims 1 to 8, comprising the steps of:
step S1, respectively forming a plurality of elastic supporting pieces through casting or injection molding or 3D printing processing;
step S2, connecting the inner ring and the outer ring through gluing, hot die pressing molding, injection molding or casting molding to form an outer tire;
step S3, fixedly connecting a plurality of hub plates, a chassis and a turntable to form a radial adjusting device, wherein a plurality of support rods are arranged on the outer side of the chassis along the circumferential direction and are used for fixedly supporting the turntable, each support rod corresponds to one hub plate, the plurality of hub plates are arranged at intervals along the periphery of the turntable, and connecting parts of the hub plates are fixedly connected with the turntable;
step S4, fixedly connecting the radial adjusting device with a cover plate to form a hub, wherein a plurality of guide chutes are arranged on the inner side of the cover plate along the circumferential direction, and each guide chute corresponds to one hub piece;
step S5, connecting the plurality of elastic supporting pieces with the outer tire and the hub by means of embedding fit or gluing.
10. A method of manufacturing an adjustable radial stiffness tire as in claim 9, further comprising:
step S6, glue is smeared on the connection matching position between the elastic supporting piece and the hub, and glue is smeared on the connection matching position between the elastic supporting piece and the outer tire.
11. A method of manufacturing an adjustable radial stiffness tire as in claim 9, wherein said snap fit comprises any one of interference, transition, or clearance.
12. The method for manufacturing a tire with adjustable radial stiffness of claim 9, wherein step S5 further comprises replacing elastic support members with different shapes or lengths and adjusting the included angle between the outer tire and the hub.
13. The method for manufacturing a tire with adjustable radial stiffness of claim 12, wherein when the number of the elastic support members is M, an adjustment angle of an angle between the outer tire and the hub is in a range of [0 °/M ] to [ 360 °/M ].
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