CN117799362B - Support structure for non-pneumatic tire, and vehicle - Google Patents
Support structure for non-pneumatic tire, and vehicle Download PDFInfo
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- CN117799362B CN117799362B CN202410235145.3A CN202410235145A CN117799362B CN 117799362 B CN117799362 B CN 117799362B CN 202410235145 A CN202410235145 A CN 202410235145A CN 117799362 B CN117799362 B CN 117799362B
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Abstract
The application relates to the technical field of tires, and discloses a support body structure of a non-pneumatic tire, the non-pneumatic tire and a vehicle, wherein the support body structure comprises two shearing structures and an elastic shearing piece; one of the two shear structures is connected to the inner buffer layer, and the other of the two shear structures is connected to the outer buffer layer; the shearing piece is connected between the two shearing structures, the shearing piece and the two shearing structures are provided with overlapping parts, and the shearing piece can elastically deform; the one end that two shearing structures deviate from the shearing piece all has the contained angle, and two clamp angles are established in the both sides of shearing piece, all have the elastic connecting piece that can elasticity open and shut in two contained angles, and the first elastic arm of connecting piece and the one side that the second elastic arm was carried on one side of carrying on one side in opposite directions are connected respectively on two angle arms of contained angle, and supporter structure atress is more even, has avoided the phenomenon emergence of fatigue failure such as bending or fracture because of taking place stress concentration to a certain extent, has promoted fatigue durability and life.
Description
Technical Field
The present application relates to the field of tire technologies, and in particular, to a support structure for a non-pneumatic tire, and a vehicle.
Background
The tire is required to withstand the impact of a complex and severe road surface for a long period of time as the only part of the vehicle that is in contact with the road surface, and therefore, the fatigue durability of the tire is an important factor in determining the service life of the tire.
A non-pneumatic tire generally includes an inner breaker ply, an outer breaker ply, and a support body connected between an inner surface of the outer breaker ply and an outer surface of the inner breaker ply, such as disclosed in chinese patent application publication No. CN 113580849B. The support body is the main bearing force component of the non-pneumatic tire. When the tire receives a radial load, the support body in the ground contact area is pressed and the length thereof is shortened, and the support body in the non-ground contact area is stretched and deformed to a certain extent, so that the non-pneumatic tire tends to realize radial load by deformation of the support body.
However, in the related art, when the support body bears radial load, the support body is often stressed unevenly and is easy to concentrate stress, so that the support body is subjected to fatigue damage such as bending or fracture, and the like, so that the fatigue durability is poor and the service life is low.
Disclosure of Invention
In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a support structure for a non-pneumatic tire, and a vehicle.
In a first aspect, the present application provides a support structure for a non-pneumatic tire, the non-pneumatic tire including an inner cushion layer and an outer cushion layer coaxially disposed, the outer cushion layer being disposed around an outer side of the inner cushion layer, the support structure including two shear structures and an elastic shear member;
One of the two shearing structures is connected to the outer wall surface of the inner buffer layer and extends towards the direction approaching the outer buffer layer, and the other of the two shearing structures is connected to the inner wall surface of the outer buffer layer and extends towards the direction approaching the inner buffer layer; the shearing piece is connected between the two shearing structures, the projection of any shearing structure in the circumferential direction of the non-pneumatic tire is at least partially positioned in the area range of the profile of the shearing piece, the projection of the shearing piece in the circumferential direction of the non-pneumatic tire is positioned in the area range of the profile of the shearing structure, and the shearing piece can be elastically deformed when the two shearing structures move towards the direction of approaching or separating from each other;
the two shearing structures are provided with included angles at one ends which are far away from the shearing piece, the two included angles are respectively arranged at two sides of the central line of the shearing piece in the direction from the inner buffer layer to the outer buffer layer, elastic connecting pieces are arranged in the two included angles, the connecting pieces are provided with a first elastic arm and a second elastic arm which are arranged in an intersecting manner, one surfaces of the first elastic arm and the second elastic arm, which are opposite, are respectively connected to two corner arms of the included angles, and the connecting pieces can be elastically opened and closed when the two corner arms move towards the direction which is close to or far away from each other;
The shearing structure comprises a connecting rod and a shearing rod;
The connecting rod is connected to the outer wall surface of the inner buffer layer or the inner wall surface of the outer buffer layer, one end of the shearing rod is connected to the connecting rod, the included angle is formed between the shearing rod and the connecting rod, and the shearing piece is connected between the shearing rods of the two shearing structures.
Optionally, the connecting rod is disconnected from the shear rod, one side of the connecting piece is bonded with the connecting rod, and the other side of the connecting piece is bonded with the shear rod;
Or the connecting rod and the shearing rod are integrally formed, a transition circular arc is arranged at the joint of the connecting rod and the shearing rod, and the connecting piece is at least connected at the transition circular arc.
Optionally, an included angle between a plane in which the shear bar is located and a radial direction of the non-pneumatic tire is not greater than 90 °;
And/or the shear member has a centerline parallel to the shear bar, the angle between the centerline of the shear member and the radial direction of the non-pneumatic tire being no greater than 90 °.
Optionally, the shearing piece is a shearing block, and a shearing hole is formed in the shearing block; the number of the shearing holes is at least two, and at least two shearing holes are arranged in rows and columns at intervals.
Optionally, the shearing piece includes at least two shearing ribs, at least two shearing ribs are arranged at intervals along the direction from the inner buffer layer to the outer buffer layer, and two ends of each shearing rib are respectively connected to two shearing structures;
And the thickness of the middle area of each shearing rib is smaller than the thickness of the two ends of each shearing rib along the length direction of the shearing rib.
Optionally, the connecting pieces comprise an elastic connecting layer, a reinforcing layer, a guiding layer and two elastic parts;
The elastic connecting layer comprises a first elastic arm and a second elastic arm which are intersected, the reinforcing layer is connected to one surface of the first elastic arm, which is opposite to the second elastic arm, the guiding layer is connected to one surface of the reinforcing layer, which is away from the elastic connecting layer, and the two elastic parts are respectively connected to two ends of the guiding layer and are respectively connected with the reinforcing layer.
Optionally, the shearing structure connected with the inner buffer layer includes two shearing main bodies, the two shearing main bodies are sequentially arranged along the circumferential direction of the non-pneumatic tire, the shearing structure connected with the outer buffer layer is clamped between the two shearing main bodies, and the shearing pieces are arranged between the shearing structure and the two shearing main bodies;
Or the shearing structure connected with the outer buffer layer comprises two shearing main bodies, wherein the two shearing main bodies are sequentially arranged along the circumferential direction of the non-pneumatic tire, the shearing structure connected with the inner buffer layer is clamped between the two shearing main bodies, and the shearing pieces are arranged between the shearing structure and the two shearing main bodies.
In a second aspect, the present application also provides a non-pneumatic tire comprising an inner breaker ply, an outer breaker ply, and a plurality of support structures for the non-pneumatic tire as described above;
a plurality of support structures of the non-pneumatic tire are disposed between the outer cushion layer and the inner cushion layer at intervals along a circumferential direction of the non-pneumatic tire.
In a third aspect, the application also provides a vehicle comprising a non-pneumatic tyre as described above.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
According to the support structure of the non-pneumatic tire, the non-pneumatic tire and the vehicle, the elastic shearing piece and the two shearing structures are arranged, one of the two shearing structures is connected to the outer wall surface of the inner buffer layer and extends towards the direction approaching the outer buffer layer, the other of the two shearing structures is connected to the inner wall surface of the outer buffer layer and extends towards the direction approaching the inner buffer layer, that is, one ends of the two shearing structures are respectively connected to the inner buffer layer and the outer buffer layer, and the other ends of the two shearing structures are respectively arranged towards the direction approaching each other. The shear member is connected between the two shear structures, and the projection of either shear structure in the circumferential direction of the non-pneumatic tire is at least partially within the area of the profile in which the shear member is located, and the projection of the shear member in the circumferential direction of the non-pneumatic tire is within the area of the profile in which the shear structure is located. The shear member is capable of elastic deformation when the two shear structures are moved in directions toward or away from each other. The one end that deviates from of two shearing structures cuts the piece all has the contained angle, and two clamp angles are established in the both sides of the central line of shearing piece on the direction along interior buffer layer to outer buffer layer, all are provided with elastic connecting piece in two contained angles, and the connecting piece has first elastic arm and the second elastic arm that intersect and set up, and the one side that first elastic arm and second elastic arm are on the back of the body is connected respectively on two angle arms of contained angle, but the connecting piece elasticity when two angle arms are moved towards the direction that is close to each other or keep away from. When the support body structure is in specific use, when bearing radial load, the load on the shear structure comprises tangential force transmitted along the support body structure and vertical force perpendicular to the support body structure, so that the two shear structures are subjected to tangential displacement towards directions close to each other or far away from each other under the action of the tangential force, the shear member is subjected to elastic shear deformation, the shear member can absorb and buffer the tangential force of the two shear structures and also apply the tangential force reverse to the two shear structures, the two shear structures are subjected to reverse tangential displacement to reset, and the support body structure is subjected to uniform stress when bearing radial load, so that fatigue damage phenomena such as bending or fracture and the like of the support body structure due to stress concentration are avoided to a certain extent, the fatigue durability of the support body structure is improved, and the service life of the support body structure and a non-pneumatic tire with the support body structure is prolonged. Simultaneously, because be provided with elastic connecting piece in the contained angle of two shearing structures respectively, so when the contained angle of two shearing structures opens under the effect of perpendicular force, the connecting piece that is located in the contained angle takes place elastic opening and shutting deformation, that is to say, the connecting piece can take place circumference elastic deformation along its circumference when corresponding contained angle opens for two shearing structures atress under the effect of perpendicular force is more even, has further avoided support body structure to take place fatigue failure such as bending or fracture, has further promoted support body structure's fatigue durability, has prolonged its life.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic view of a support structure of a non-pneumatic tire according to an embodiment of the present application;
fig. 2 is a partial enlarged view of a portion a in fig. 1;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic force diagram of a support structure of a non-pneumatic tire according to an embodiment of the present application;
FIG. 5 is a schematic view of shear deformation of a support structure of a non-pneumatic tire according to an embodiment of the present application;
FIG. 6 is a schematic representation of a variation of the attachment of the support structure of a non-pneumatic tire according to an embodiment of the present application;
FIG. 7 is a schematic view of a support structure of a non-pneumatic tire according to another embodiment of the present application;
FIG. 8 is a schematic view of a support structure of a non-pneumatic tire according to yet another embodiment of the present application;
FIG. 9 is a schematic view of a shear member of a support structure of a non-pneumatic tire according to yet another embodiment of the present application;
FIG. 10 is a schematic view of a shear member of a support structure of a non-pneumatic tire according to another embodiment of the present application;
FIG. 11 is a schematic view of a shear member of a support structure of a non-pneumatic tire according to yet another embodiment of the present application;
Fig. 12 is a partial enlarged view of the portion B in fig. 11;
FIG. 13 is an isometric view of a non-pneumatic tire according to another embodiment of the present application;
fig. 14 is a front view of a non-pneumatic tire according to another embodiment of the present application.
Wherein, 10, the support body structure; 1. a shear structure; 11. a connecting rod; 12. a shear bar; 101. shearing the main body; 2. a shear member; 21. shearing the hole; 22. shearing the ribs; 3. a connecting piece; 31. an elastic connection layer; 311. a first elastic arm; 312. a second elastic arm; 32. a reinforcing layer; 33. a guiding layer; 34. an elastic part; 100. a non-pneumatic tire; 20. an inner buffer layer; 30. an outer buffer layer; 40. shearing the belt; 50. and (3) a tread.
Detailed Description
In order that the above objects, features and advantages of the application will be more clearly understood, a further description of the application will be made. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the application.
The non-pneumatic tire has a series of advantages of explosion prevention, no air pressure maintenance, high safety performance and the like, has huge structural design space and material design space, and becomes one of the future development directions of the tire industry.
The non-pneumatic tire generally includes an inner cushion layer, an outer cushion layer, and a support structure disposed between the inner cushion layer and the outer cushion layer and connected to an outer wall surface of the inner cushion layer and an inner wall surface of the outer cushion layer, respectively. The support body structure is a main bearing force component of the non-pneumatic tire. When the non-pneumatic tire receives a radial load, the support structure of the ground contact area is compressed and the length thereof is shortened, and the support structure of the non-ground contact area is subjected to a certain tensile elongation deformation, so that the non-pneumatic tire tends to realize the radial load by the deformation of the support structure.
However, for a non-pneumatic tire, when the support structure is subjected to radial load, the support structure is often stressed unevenly and has stress concentration points, so that the stress concentration phenomenon is easy to occur, the support structure is subjected to fatigue damage such as bending or fracture, the fatigue durability of the support structure is poor, and the service life of the support structure is short.
Aiming at the defects, the embodiment provides the support body structure of the non-pneumatic tire, the non-pneumatic tire and the vehicle, and the support body structure is improved, so that the stress is relatively uniform when the support body structure is deformed, and the problem of stress concentration is not easy to occur, thereby avoiding the occurrence of fatigue damage phenomena such as bending or fracture and the like of the support body structure when the support body structure bears radial load to a certain extent, improving the fatigue durability of the support body structure, and prolonging the service life of the support body structure and the non-pneumatic tire with the support body structure.
Referring to fig. 1 to 14, the present embodiment provides a support structure 10 (hereinafter simply referred to as support structure 10) of a non-pneumatic tire 100, the support structure 10 being disposed between an inner cushion layer 20 and an outer cushion layer 30 of the non-pneumatic tire 100, and mainly functioning as support and cushion.
Specifically, referring to fig. 1 and 4, the support structure 10 includes two shear structures 1 and an elastic shear member 2, one of the two shear structures 1 is connected to the outer wall surface of the inner buffer layer 20 and extends in a direction approaching the outer buffer layer 30, the other of the two shear structures 1 is connected to the inner wall surface of the outer buffer layer 30 and extends in a direction approaching the inner buffer layer 20, that is, one ends of the two shear structures 1 are connected to the inner buffer layer 20 and the outer buffer layer 30, respectively, and the other ends of the two shear structures 1 are arranged in a direction approaching each other, respectively.
In some implementations, one end of the two shear structures may be bonded to the inner and outer buffer layers, respectively, for example.
In other implementations, one end of the two shear structures is welded, such as by hot melt welding, to the inner and outer buffer layers.
In particular, the shearing structure 1 may be made of reinforced fiberglass resin rod or rubber composite, i.e. fiberglass resin rod is embedded in a rubber matrix.
The shear member 2 is connected between the two shear structures 1, and the projection of either shear structure 1 in the circumferential direction of the non-pneumatic tire is at least partially located in the region of the contour where the shear member 2 is located, and the projection of the shear member 2 in the circumferential direction of the non-pneumatic tire is located in the region of the contour where the shear structure 1 is located, and the shear member 2 is elastically deformable when the two shear structures 1 are moved in the directions approaching or separating from each other.
In particular, a portion of one of the shear structures 1 projected in the circumferential direction of the non-pneumatic tire 100 is located in a region where a contour of the other of the shear structures 1 is located, and a projection of the shear member 2 in the circumferential direction of the non-pneumatic tire is located in a region where a contour of each of the shear structures 1 is located, so that the two shear structures 1 have overlapping portions in a direction along the inner cushion layer 20 to the outer cushion layer 30, the shear member 2 is sandwiched between the overlapping portions of the two shear structures 1 and fixedly connected to the two shear structures 1, respectively, that is, the two outer wall surfaces of the shear member 2 in the circumferential direction of the non-pneumatic tire 100 are connected to the two shear structures 1, respectively, and the shear member 2, the two shear structures 1 have overlapping portions in a direction along the inner cushion layer 20 to the outer cushion layer 30.
Referring to fig. 4 and 5, when the supporting body structure 10 bears radial load, the load F acting on the shearing structure 1 includes a vertical force F1 perpendicular to the shearing structure 1 and a tangential force F2 transmitted along the shearing structure 1, so that the two shearing structures 1 undergo tangential displacement towards directions approaching to or separating from each other under the action of the tangential force, the shearing piece 2 can elastically deform in a shearing manner, the shearing piece 2 can absorb and buffer the tangential force of the two shearing structures 1, and plays a role of buffering and damping, and also applies to the tangential force of the two shearing structures 1 in opposite directions, so that the two shearing structures 1 undergo opposite tangential displacement to reset, and play a role of supporting.
Referring to fig. 4 and 5, the same support structure 10, the upper shear structure 1 is connected to the inner buffer layer 20, defined as the radially inner shear structure 1. The underlying shear structure 1 is attached to the outer buffer layer 30, defined as the radially outer shear structure 1. Illustratively, referring to FIG. 5, when the support structure 10 is subjected to radial loads, the radially inner shear structure 1 is subjected to a tangential force f2 downward by the arrow, and the radially inner shear structure 1 is displaced tangentially downward; the radially outer shearing structure 1 is subjected to an arrow-up tangential force f2 under the reaction force of the ground, and the radially outer shearing structure 1 is displaced tangentially upward. The two tangential forces are applied to the shear member 2, the shear member 2 is elastically sheared and deformed, and the shearing member 2 is applied to the two shear structures 1 to reverse the tangential force, so that the shear member 2 not only has the functions of absorbing and buffering vibration, but also enables the two shear structures 1 to reverse the tangential displacement to reset and play a supporting role, so that the stress between the two shear structures 1 and the shear member 2 is relatively uniform, stress concentration points on the support structure 10 are avoided, fatigue damage phenomena such as bending or breakage caused by stress concentration are avoided, the fatigue durability of the support structure 10 is improved, and the service lives of the support structure 10 and the non-pneumatic tire 100 with the support structure 10 are prolonged.
The cutting element 2 can be glued to two cutting structures 1, for example, but the cutting element 2 can also be formed integrally with one of the cutting structures 1, for example, and be connected to the other cutting structure 1 by means of gluing or hot-melt welding.
In some implementations, the shear member 2 may be made of rubber or foam, for example, and the elastic shear deformation is relatively uniform without stress concentrations.
Referring to fig. 1 to 4, one ends of the two shearing structures 1 facing away from the shearing member 2 have included angles, the two included angles are arranged on two sides of a central line (refer to a straight line O in fig. 1) of the shearing member 2 in a direction from the inner buffer layer 20 to the outer buffer layer 30, elastic connecting members 3 are arranged in the two included angles, the connecting members 3 are provided with first elastic arms 311 and second elastic arms 312 which are arranged in an intersecting manner, one surfaces of the first elastic arms 311 and the second elastic arms 312, which are opposite, are respectively connected to the two corner arms of the included angles, and the connecting members 3 can be elastically opened and closed when the two corner arms move towards a direction approaching or away from each other.
That is, the end of the radially inner shearing structure 1 facing the inner buffer layer 20 has an included angle, and the end of the radially outer shearing structure 1 facing the outer buffer layer 30 also has an included angle for connection, and the included angle of the radially inner shearing structure 1 and the included angle of the radially outer shearing structure 1 are disposed on two sides of the center line O of the shearing member 2, so that the structural stability of the support structure 10 is higher, the radial rigidity is higher, and the fatigue durability thereof is further improved.
Because the elastic connecting pieces 3 are respectively arranged in the included angles of the two shearing structures 1, when the included angles of the two shearing structures 1 are opened under the action of the vertical force f1, the connecting pieces 3 positioned in the included angles elastically deform in an opening and closing manner (shown by double arrow curves R in the reference fig. 3 and 6), that is, the connecting pieces 3 can elastically deform circumferentially along the circumferential direction when the corresponding included angles are opened, so that the stress of the two shearing structures 1 is relatively uniform under the action of the vertical force, fatigue damage such as bending or breakage of the supporting body structure 10 is further avoided, the fatigue durability of the supporting body structure 10 is further improved, and the service life of the supporting body structure is prolonged.
In particular, the included angle between the first elastic arm 311 and the second elastic arm 312 of the connecting member 3 is matched with the included angle of the end of the corresponding shear structure 1.
According to the support body structure 10 provided by the application, by arranging the elastic shearing member 2 and the two shearing structures 1, one of the two shearing structures 1 is connected to the outer wall surface of the inner buffer layer 20 and extends towards the direction approaching the outer buffer layer 30, the other of the two shearing structures 1 is connected to the inner wall surface of the outer buffer layer 30 and extends towards the direction approaching the inner buffer layer 20, that is, one ends of the two shearing structures 1 are respectively connected to the inner buffer layer 20 and the outer buffer layer 30, and the other ends of the two shearing structures 1 are respectively arranged towards the direction approaching each other. The shear member 2 is connected between the two shear structures 1, and the projection of either shear structure 1 in the circumferential direction of the non-pneumatic tire is at least partially located in the area of the contour of the shear member 2, and the projection of the shear member 2 in the circumferential direction of the non-pneumatic tire is located in the area of the contour of the shear structure 1. The shear member 2 is capable of elastic deformation when the two shear structures 1 are moved in directions towards or away from each other. The one end that deviates from shearing part 2 of two shearing structures 1 all has the contained angle, and two clamp angles are established in the both sides of the central line of shearing part 2 in the direction along interior buffer layer 20 to outer buffer layer 30, all are provided with elastic connecting piece 3 in two contained angles, and connecting piece 3 has the first elastic arm 311 and the second elastic arm 312 that intersect and set up, and the one side that first elastic arm 311 and second elastic arm 312 are on the back of the body is connected respectively on two angle arms of contained angle, but connecting piece 3 elasticity when two angle arms are moved towards the direction that is close to each other or keep away from each other opens and shuts. When the support body structure 10 is in specific use, when bearing radial load, the load acting on the shear structure 1 comprises tangential force transmitted along the support body structure and vertical force perpendicular to the support body structure, so that the two shear structures 1 are subjected to tangential displacement towards directions close to each other or away from each other under the action of the tangential force, the shear piece 2 is subjected to elastic shear deformation, the shear piece 2 not only can absorb and buffer the tangential force of the two shear structures 1, but also can be applied to the tangential force of the two shear structures 1 in opposite directions, the two shear structures 1 are subjected to opposite tangential displacement to reset, and the support body structure 10 is subjected to radial load in such a way, the stress is relatively uniform, and fatigue damage phenomena such as bending or fracture and the like of the support body structure 10 due to stress concentration are avoided to a certain extent, so that the fatigue durability of the support body structure 10 is improved, and the service life of the support body structure 10 and the non-pneumatic tire 100 with the support body structure 10 is prolonged. Meanwhile, as the elastic connecting pieces 3 are respectively arranged in the included angles of the two shearing structures 1, when the included angles of the two shearing structures 1 are opened under the action of the vertical force, the connecting pieces 3 positioned in the included angles are elastically deformed in an opening and closing manner, that is, the connecting pieces 3 can be elastically deformed in the circumferential direction when the corresponding included angles are opened, so that the stress of the two shearing structures 1 is relatively uniform under the action of the vertical force, the fatigue damage such as bending or fracture of the supporting body structure 10 is further avoided, the fatigue durability of the supporting body structure 10 is further improved, and the service life of the supporting body structure is prolonged.
In some embodiments, referring to fig. 1-4, the shear structure 1 includes a connecting rod 11 and a shear rod 12. The connecting rod 11 is connected to the outer wall surface of the inner buffer layer 20 or the inner wall surface of the outer buffer layer 30, one end of the shear rod 12 is connected to the connecting rod 11 and forms an included angle with the connecting rod 11, and the shear member 2 is connected between the shear rods 12 of the two shear structures 1.
Illustratively, the connecting rod 11 of the radially inner shearing structure 1 is connected to the outer wall surface of the inner buffer layer 20, the shearing rod 12 of the radially inner shearing structure 1 extends outwards towards the direction close to the outer buffer layer 30, an included angle is formed between the connecting rod 11 of the radially inner shearing structure 1 and the shearing rod 12, and an elastic connecting piece 3 capable of opening and closing is connected in the included angle. Meanwhile, when the included angle between the connecting rod 11 and the shearing rod 12 of the radially inner shearing structure 1 is opened and closed when the radial load is applied, the connecting piece 3 is opened and closed along with the included angle, and the circumferential deformation occurs, so that the stress concentration at the included angle is avoided, the service life and fatigue performance of the support body structure 10 are further improved, and the use safety is higher.
The connecting rod 11 of radial outside shearing structure 1 is connected on the internal face of outer buffer layer 30, and the shearing rod 12 of radial outside shearing structure 1 inwards extends towards the direction that is close to interior buffer layer 20, has the contained angle between the connecting rod 11 of radial outside shearing structure 1 and the shearing rod 12, and the contained angle internal connection has the elastic connecting piece 3 that can open and shut, simple structure, easy preparation, connect steadily and reliably. Meanwhile, when the included angle between the connecting rod 11 and the shearing rod 12 of the radial outer shearing structure 1 is opened and closed when the radial load is applied, the connecting piece 3 is opened and closed along with the radial outer shearing structure, and the circumferential deformation occurs, so that the stress concentration at the included angle is avoided, the service life and fatigue performance of the support body structure 10 are further improved, and the use safety is higher.
In each support structure 10, the shear bars 12 of the two shear structures 1, wherein the projection of one shear bar 12 along the circumferential direction of the non-pneumatic tire 100 is located in the area of the outline where the other shear bar 12 is located, and the projection of the shear member 2 along the circumferential direction of the non-pneumatic tire is located in the area of the outline where each shear bar 12 is located, the shear member 2 is connected between the shear bars 12 of the two shear structures 1 and fixedly connected with the two shear bars 12 respectively, namely, the two outer wall surfaces of the shear member 2 along the circumferential direction of the non-pneumatic tire 100 are respectively connected with the two shear bars 12, so that the shear member 2 and the two shear bars 12 have overlapping parts along the direction from the inner buffer layer 20 to the outer buffer layer 30, when the support structure 10 is subjected to radial load, the shear deformation of the shear member 2 can occur, the stress is uniform, the occurrence of fatigue phenomena such as bending, fracture and the like due to stress concentration are avoided, and the fatigue performance is high.
The arrangement of the connecting rods 11 increases the connection area between the shearing structure 1 and the corresponding buffer layer, and helps to improve the connection strength and the radial support strength, so that the support body structure 10 can play a better role in supporting and damping.
In some embodiments, referring to fig. 2 and 3, the connecting rod 11 is disconnected from the shear rod 12, one side of the connecting member 3 is bonded to the connecting rod 11, and the other side of the connecting member 3 is bonded to the shear rod 12.
Illustratively, referring to fig. 2 and 3, the first elastic arm 311 of the connector 3 is bonded to the connecting rod 11, and the second elastic arm 312 of the connector 3 is bonded to the shear rod 12.
The shape of the outer wall surface of the first elastic arm 311 is matched with the shape of the corresponding connecting rod 11, the shape of the outer wall surface of the second elastic arm 312 is matched with the shape of the corresponding shear rod 12, and the connecting rod is good in fit and convenient to connect.
In other embodiments, the connecting rod and the shear rod are integrally formed, so that the support body structure has good integrity and high structural strength, and can play a better radial bearing role.
When concrete realization, the junction of connecting rod and shearing rod has the transition circular arc, and the connecting piece is connected in transition circular arc department at least, has further avoided appearing stress concentration phenomenon in the contained angle department between connecting rod and the shearing rod to fatigue performance has been promoted.
In some embodiments, referring to fig. 1, the angle α between the plane in which the shear bar 12 is located and the radial direction of the non-pneumatic tire 100 (referring to the radial line r in fig. 1) is not greater than 90 °, so that the connection 3 is elastically deformed circumferentially.
In particular, the included angles of the two shearing structures 1 can be equal, so that the two shearing structures 1 can be symmetrically arranged about the shearing piece 2, and the structural stability of the supporting body structure 10 is higher, the supporting strength is higher, and the stress is more uniform.
In some embodiments, referring to fig. 1, the shear member 2 has a centerline O parallel to the shear bar 12, and the angle β between the centerline O of the shear member 2 and the radial direction r of the non-pneumatic tire 100 is no greater than 90 °, facilitating elastic circumferential deformation of the connector 3.
In particular, the included angles of the two shearing structures 1 can be equal, for example, so that the two shearing structures 1 can be symmetrically arranged about the shearing piece 2, and the supporting body structure 10 has higher structural stability, higher supporting strength and more uniform stress.
In some embodiments, referring to fig. 10, the shear member 2 is a shear block, and the shear block is provided with a shear hole 21.
By providing the shear holes 21 in the shear block, the amount of shear deformation of the shear block is increased under the same structure, thereby improving the cushioning and damping performance of the support structure 10 and the non-pneumatic tire 100.
In particular, the shear hole 21 may be a circular hole, an elliptical hole, or the like.
In some implementations, at least two shear holes 21 are arranged in rows and columns and at intervals, so that the shear deformation of the shear block is further increased, and the cushioning and shock absorbing properties of the support structure 10 and the non-pneumatic tire 100 are further improved.
In other implementations, for example, the thickness of the shear block may be increased, i.e., the size of the shear block along the perpendicular line between the two shear bars 12, and the amount of shear deformation of the shear block may also be increased.
In some embodiments, referring to fig. 11, the shear member 2 includes at least two shear ribs 22, at least two shear ribs 22 are spaced apart along the direction from the inner buffer layer 20 to the outer buffer layer 30, and two ends of each shear rib 22 are respectively connected to, for example, adhered to, two shear structures 1, specifically, two ends of each shear rib 22 are respectively adhered to the shear bars 12 of two shear structures 1.
The shearing ribs 22 which are distributed at intervals are connected between the shearing rods 12 of the two shearing structures 1, so that shearing deformation of the shearing pieces 2 is facilitated, the shearing deformation of the shearing pieces 2 is conveniently improved, and the cushioning and damping performances of the support body structure 10 and the non-pneumatic tire 100 are conveniently improved.
In particular, referring to fig. 12, the thickness of the middle region of each shear rib 22 is smaller than the thickness of the two ends of each shear rib 22 along the length direction of the shear rib 22, that is, each shear rib 22 is formed in a shape with a thin middle and thick two ends, which is further beneficial for the shear deformation of the shear member 2.
In some implementations, the thickness of the shear rib may, for example, sequentially increase linearly in a direction from the middle of the shear rib to the two ends of the shear rib, with the outer wall of the shear rib being formed as a smooth outer wall.
In other implementations, the thickness of the shear rib may be stepped, for example, in a direction from the middle of the shear rib to the ends of the shear rib.
In some embodiments, referring to fig. 3, the connection members 3 each include an elastic connection layer 31, a reinforcement layer 32, a guide layer 33, and two elastic portions 34. The elastic connection layer 31 includes a first elastic arm 311 and a second elastic arm 312 which intersect, the reinforcing layer 32 is connected to a surface of the first elastic arm 311 opposite to the second elastic arm 312, the guiding layer 33 is connected to a surface of the reinforcing layer 32 facing away from the elastic connection layer 31, and two elastic portions 34 are respectively connected to two ends of the guiding layer 33 and respectively connected to the reinforcing layer 32.
In some implementations, the elastic connection layer 31 and the elastic portion 34 may be made of a polymer material such as rubber or polyurethane, and mainly serve to wrap the reinforcing layer 32 and the guiding layer 33.
The reinforcing layer 32 may be a reinforcing tape made of a flexible material such as twisted belt steel wire or twisted fiber, and has tensile and compressive properties.
The inside of the guiding layer 33 is filled with a hard glass fiber composite material, and the arrangement direction of the hard glass fiber composite material is radial (shown by a line L in reference to FIG. 6) of the circumference, namely, the direction pointing to the external large arc along the small arc inside, and the hard glass fiber composite material is densely arranged in a radial shape and mainly plays a role in converting radial deformation into circumferential deformation.
As shown in fig. 6, during the deformation process, the connecting member 3 is closed from the broken line position to the solid line position, and during the deformation process, only the region where the guiding layer 33 is located is deformed circumferentially, and as shown by the line L in fig. 6, the region where the guiding layer 33 is located is not bent radially.
The elastic connection layer 31, the reinforcing layer 32, the guide layer 33, and the two elastic portions 34 may be integrally formed. The elastic connecting layer 31, the reinforcing layer 32, the guide layer 33 and the two elastic parts 34 are formed into a bionic double-shell hinge structure together, so that the elastic connecting layer is convenient to open and close and is convenient to convert radial change into circumferential deformation.
When the connecting rod is specifically used, referring to fig. 3, in the process of extruding and closing the connecting rod 11 and the shearing rod 12 in directions close to each other, the guide block is circumferentially deformed, and meanwhile, the reinforcing layer 32 is also driven to elastically stretch, so that the radial change is converted into the circumferential deformation, and the connecting piece 3 is effectively elastically opened and closed in the circumferential direction.
In some embodiments, referring to fig. 7 to 9, the shear structure 1 connected to the inner cushion layer 20 includes two shear bodies 101, the two shear bodies 101 are sequentially disposed along the circumferential direction of the non-pneumatic tire 100, the shear structure 1 connected to the outer cushion layer 30 is sandwiched between the two shear bodies 101, and the shear members 2 are disposed between the two shear bodies 101, that is, the middle portion of each support structure 10 is provided with two shear members 2, so that the shear deformation of the support structure 10 is further improved, the stress of the support structure 10 is more uniform, and fatigue damage phenomena such as bending or breaking of the support structure 10 due to stress concentration are further avoided, and the fatigue durability and service life of the support structure 10 are further improved.
In some implementations, each shear body 101 may be formed, for example, as a V-shaped structure, and the closed corners of the V-shaped structure may be smoothly transitioned, for example. The above-mentioned elastic connection piece 3 can also be provided at the closing angle of the V-shaped structure.
Of course, referring to fig. 8, the radially inner shearing structure 1 may be, for example, an inverted V-shaped shearing body 101, the radially outer shearing structure 1 may also be, for example, an inverted V-shaped shearing body 101, the two inverted V-shaped shearing bodies 101 have overlapping portions along the radial direction of the supporting body structure 10, and the shearing members 2 are respectively provided between the outer wall of the radially outer shearing structure 1 and the inner wall of the radially inner shearing structure 1.
In some embodiments, the shearing structure connected with the outer buffer layer comprises two shearing main bodies, the two shearing main bodies are sequentially arranged along the circumferential direction of the non-pneumatic tire, the shearing structure connected with the inner buffer layer is clamped between the two shearing main bodies, and shearing pieces are arranged between the two shearing main bodies, that is, the middle part of each supporting body structure is provided with two shearing pieces, so that the shearing deformation of the supporting body structure is further improved, the stress of the supporting body structure is more uniform, the occurrence of fatigue failure phenomena such as bending or fracture and the like of the supporting body structure due to stress concentration is further avoided, and the fatigue durability and the service life of the supporting body structure are further improved.
The present embodiment also provides a non-pneumatic tire 100, the non-pneumatic tire 100 comprising an inner cushion layer 20, an outer cushion layer 30, and a plurality of support structures 10.
Wherein the inner cushion layer 20 and the outer cushion layer 30 are coaxially disposed, and the outer cushion layer 30 is disposed outside the inner cushion layer 20 along the circumferential direction of the non-pneumatic tire 100.
The plurality of support structures 10 are disposed between the outer cushion layer 30 and the inner cushion layer 20 at intervals along the circumferential direction of the non-pneumatic tire 100, one end of each support structure 10 is connected to the outer wall surface of the inner cushion layer 20, and the other end of each support structure 10 is connected to the inner wall surface of the outer cushion layer 30.
In some implementations, both ends of each support structure 10 are bonded to the outer wall surface of the inner cushion layer 20 and the outer wall surface of the inner cushion layer 20, respectively.
In addition, referring to fig. 13 and 14, the non-pneumatic tire 100 further includes a shear band 40 and a tread 50. The shear band 40 is bonded to the outer wall surface of the outer cushion layer 30 in the circumferential direction of the non-pneumatic tire 100, and the tread 50 is bonded to the outer wall surface of the shear band 40 in the circumferential direction of the non-pneumatic tire 100.
The shear band 40 serves primarily to maintain circumferential stiffness and also serves as part of the load bearing. The shearing is usually made of a reinforced layer shearing belt made of a composite material, wherein a matrix material of the reinforced layer shearing belt can be a high polymer elastomer material such as rubber, and a reinforced material can be steel wires, nylon, glass fibers and the like.
Referring to fig. 3 to 5, when the support structure 10 of the non-pneumatic tire 100 receives a radial load, the load F from the axle, which acts on the shear structure 1 of the support structure 10, includes a vertical force F1 perpendicular to the shear structure 1 and a tangential force F2 transmitted along the shear structure 1 itself, the vertical force F1 causes the first and second connectors 3 and 3 to deform circumferentially, and the tangential force F2 causes the shear member 2 to deform uniformly, so that the occurrence of fracture or bending caused by stress concentration of the support structure 10 due to uneven stress is avoided to some extent, the fatigue durability of the support is improved, and the service life of the support structure 10 and the non-pneumatic tire 100 with the support structure 10 is prolonged.
The specific structure and implementation principle of the support body structure 10 in this embodiment are the same as those of the support body structure 10 provided in the foregoing embodiment, and the same or similar technical effects can be brought, which are not described in detail herein, and specific reference may be made to the description of the foregoing embodiment.
The present embodiment also provides a vehicle including a non-pneumatic tire.
The specific structure and implementation principle of the non-pneumatic tire in this embodiment are the same as those of the non-pneumatic tire provided in the foregoing embodiment, and the same or similar technical effects can be brought, which are not described in detail herein, and specific reference may be made to the description of the foregoing embodiment.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A support structure (10) for a non-pneumatic tyre comprising an inner cushion layer (20) and an outer cushion layer (30) coaxially arranged, the outer cushion layer (30) being arranged around the outer side of the inner cushion layer (20), characterized in that the support structure (10) comprises two shearing structures (1) and an elastic shearing member (2);
One of the two shearing structures (1) is connected to the outer wall surface of the inner buffer layer (20) and extends towards the direction approaching the outer buffer layer (30), and the other of the two shearing structures (1) is connected to the inner wall surface of the outer buffer layer (30) and extends towards the direction approaching the inner buffer layer (20); the shearing piece (2) is connected between the two shearing structures (1), the projection of any shearing structure (1) along the circumferential direction of the non-pneumatic tire is at least partially positioned in the area range of the outline of the shearing piece (2), the projection of the shearing piece (2) along the circumferential direction of the non-pneumatic tire is positioned in the area range of the outline of the shearing structure (1), and the shearing piece (2) can be elastically deformed when the two shearing structures (1) move towards the directions approaching or separating from each other;
The two shearing structures (1) are provided with included angles at one ends which are far away from the shearing piece (2), the two included angles are respectively arranged at two sides of the central line of the shearing piece (2) in the direction from the inner buffer layer (20) to the outer buffer layer (30), elastic connecting pieces (3) are arranged in the two included angles, the connecting pieces (3) are provided with a first elastic arm (311) and a second elastic arm (312) which are arranged in an intersecting manner, one surfaces of the first elastic arm (311) and the second elastic arm (312) which are opposite are respectively connected to the two corner arms of the included angles, and the connecting pieces (3) can be elastically opened and closed when the two corner arms move towards the directions which are close to each other or far away from each other;
The shearing structure (1) comprises a connecting rod (11) and a shearing rod (12);
The connecting rod (11) is connected to the outer wall surface of the inner buffer layer (20) or the inner wall surface of the outer buffer layer (30), one end of the shearing rod (12) is connected to the connecting rod (11), the included angle is formed between the shearing rod and the connecting rod (11), and the shearing piece (2) is connected between the shearing rods (12) of the two shearing structures (1).
2. Support structure (10) of non-pneumatic tyres according to claim 1, wherein said connecting rod (11) is disconnected from said shear rod (12), one side of said connecting piece (3) being glued to said connecting rod (11), the other side of said connecting piece (3) being glued to said shear rod (12);
or the connecting rod (11) and the shearing rod (12) are integrally formed, a transition circular arc is arranged at the joint of the connecting rod (11) and the shearing rod (12), and the connecting piece (3) is at least connected at the transition circular arc.
3. Support structure (10) for non-pneumatic tires according to claim 1, characterized in that the angle between the plane in which the shear bars (12) lie and the radial direction of the non-pneumatic tire is not greater than 90 °;
and/or the shear member (2) has a centre line parallel to the shear bar (12), the angle between the centre line of the shear member (2) and the radial direction of the non-pneumatic tyre being not more than 90 °.
4. Support structure (10) for non-pneumatic tires according to claim 1, characterized in that said shear element (2) is a shear block, on which a shear hole (21) is made; at least two shearing holes (21) are arranged in rows and columns at intervals.
5. Support structure (10) of a non-pneumatic tyre according to claim 1, characterized in that said shear element (2) comprises at least two shear ribs (22), at least two of said shear ribs (22) being spaced apart in a direction along said inner buffer layer (20) to said outer buffer layer (30), and in that each of said shear ribs (22) is connected at both ends to two of said shear structures (1), respectively;
The thickness of the middle area of each shearing rib (22) is smaller than the thickness of two ends of each shearing rib (22) along the length direction of the shearing rib (22).
6. Support structure (10) of non-pneumatic tyres according to claim 1, wherein said connectors (3) each comprise an elastic connection layer (31), a reinforcing layer (32), a guiding layer (33) and two elastic portions (34);
the elastic connection layer (31) comprises a first elastic arm (311) and a second elastic arm (312) which are intersected, the reinforcing layer (32) is connected to one surface of the first elastic arm (311) opposite to one surface of the second elastic arm (312), the guide layer (33) is connected to one surface of the reinforcing layer (32) which is far away from the elastic connection layer (31), and the two elastic parts (34) are respectively connected to two ends of the guide layer (33) and are respectively connected with the reinforcing layer (32).
7. A support structure (10) of a non-pneumatic tyre according to any one of claims 1 to 6, characterized in that the shear structure (1) connected to the inner buffer layer (20) comprises two shear bodies (101), the two shear bodies (101) being arranged in succession along the circumference of the non-pneumatic tyre, the shear structure (1) connected to the outer buffer layer (30) being interposed between the two shear bodies (101) and the shear member (2) being arranged between both shear bodies (101);
Or the shearing structure (1) connected with the outer buffer layer (30) comprises two shearing main bodies (101), the two shearing main bodies (101) are sequentially arranged along the circumferential direction of the non-pneumatic tire, the shearing structure (1) connected with the inner buffer layer (20) is clamped between the two shearing main bodies (101), and the shearing pieces (2) are arranged between the two shearing main bodies (101).
8. A non-pneumatic tyre, characterized by comprising an inner breaker ply (20), an outer breaker ply (30) and a plurality of support structures (10) of the non-pneumatic tyre according to any one of claims 1 to 7;
a plurality of support structures (10) for the non-pneumatic tire are disposed between the outer cushion layer (30) and the inner cushion layer (20) at intervals along the circumferential direction of the non-pneumatic tire.
9. A vehicle comprising the non-pneumatic tire of claim 8.
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| CN202410235145.3A CN117799362B (en) | 2024-03-01 | 2024-03-01 | Support structure for non-pneumatic tire, and vehicle |
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| CN202410235145.3A CN117799362B (en) | 2024-03-01 | 2024-03-01 | Support structure for non-pneumatic tire, and vehicle |
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| CN117799362B true CN117799362B (en) | 2024-05-03 |
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| CN116922998A (en) * | 2023-08-02 | 2023-10-24 | 季华实验室 | Support structure for non-pneumatic tire and non-pneumatic tire |
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| CN205395662U (en) * | 2016-02-19 | 2016-07-27 | 齐克岐 | Bent plate formula tire |
| CN109466251A (en) * | 2017-09-07 | 2019-03-15 | 东洋橡胶工业株式会社 | Non-inflatable tyre |
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