Run-flat tire

Abstract

The utility model discloses a run-flat tire which comprises a plurality of groups of first supporting mechanisms which are arranged around an air chamber, one side of each first supporting mechanism corresponds to a tire tread, the other side of each first supporting mechanism is connected with a tire bead, and each first supporting mechanism comprises a movable part and a bendable part which are connected with each other; the movable part comprises a first part and a second part, the first part extends in the first direction and is located on the top face of the air chamber, and the second part extends in the radial direction and is located on the side face of the air chamber. One end of the bendable part is connected with the tire bead, and the other end is connected with the second part; the plurality of groups of first supporting mechanisms can be switched from a first state to a second state; in the first state, the bendable part is not bent, and a gap is formed between every two adjacent first parts; and in the second state, at least one group of bendable parts are bent, and the first part is stacked with the adjacent first part along the circumferential direction. The first supporting mechanisms of the run-flat tire can push each other during air leakage or tire burst, so that sinking is prevented, and bumping of a vehicle is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of run-flat tire, especially to a run-flat tire. BACKGROUND

[0002] Automobile tires are generally divided into inner tube tires (traditional tires) and tubeless tires (vacuum tires). Because the traditional tire has an independent inner tube inside, once the inner tube is punctured or damaged, the tire will lose pressure rapidly, especially when the car is driving at high speed, the sudden rupture of the inner tube will cause the car to lose control, resulting in a greater driving risk. The vacuum tire has no inner tube, and the sidewall of some vacuum tires (such as run-flat tires) can better support the vehicle, will not lose pressure immediately, can drive a distance under reduced air pressure, and has high safety and stability. In order to reduce the driving risk, the vacuum tire is widely used in commercial cars and some transport vehicles at present.

[0003] The tire body of the run-flat tire generally includes a tread, a sidewall and a bead. The tread is the part directly contacting the ground, the sidewall is the part of the tire side, and the bead is used to mount the tire on the rim. The inner side of the tire body is provided with an air-tight layer, which is located between the tread and the bead, is a special rubber layer for sealing, and the air-tight layer, the sidewall and the bead jointly define a closed cavity, which is the air chamber of the run-flat tire, used to store compressed air to maintain the shape of the tire and carry the vehicle.

[0004] The tire body is further provided with a cord layer tightly attached to the air-tight layer, which extends from the sidewall to the crown of the tread and surrounds the entire circumference of the tire. When the tire pressure drops, the cord layer can continue to bear the weight of the vehicle. However, the conventional cord layer is distributed in a curved manner perpendicular to the tread. When the run-flat tire is flat or punctured, the load-carrying capacity is reduced, and the cord layer may be deformed unilaterally, such as concave, resulting in a relatively strong bump during driving of the vehicle. SUMMARY

[0005] The utility model discloses a run-flat tire, the first support mechanism (i.e. cord layer) inside can push each other when the run-flat tire is punctured or punctured, prevent the concave, thereby greatly reduce the bump of the vehicle.

[0006] To solve the above technical problems, the embodiment of the utility model discloses a run-flat tire, which comprises a tread, an air chamber and a bead from outside to inside in turn, the tread is connected with the bead, the air chamber is located between the tread and the bead, and the run-flat tire further comprises:

[0007] a plurality of groups of first support mechanisms, the plurality of groups of first support mechanisms being arranged around the air chamber, each group of the first support mechanisms comprising a movable part and a foldable part connected with each other;

[0008] the movable part comprises a first part and a second part, the first part being located on a top surface of the air chamber, and the second part being located on a side surface of the air chamber, one end of the second part being connected with the first part;

[0009] the foldable part is located on the side surface of the air chamber, one end of the foldable part being used for connecting with the tire bead, and the other end of the foldable part being connected with the other end of the second part;

[0010] wherein the plurality of groups of first support mechanisms are used for switching from a first state to a second state;

[0011] in the first state, the foldable part of each group of the first support mechanisms is not folded, and a gap is arranged between the first parts of adjacent groups of the first support mechanisms;

[0012] in the second state, the foldable part of at least one group of the first support mechanisms is folded, and the corresponding first part of the folded foldable part and the first part adjacent to the folded foldable part are stacked along a circumferential direction.

[0013] By adopting the above technical solution, the plurality of groups of first support mechanisms of the run-flat tire can be switched from the first state (a state corresponding to the first support mechanism when the run-flat tire is normally working) to the second state (a state corresponding to the first support mechanism when the run-flat tire is in an abnormal state such as a flat tire, a tire puncture or a tire burst).

[0014] Firstly, the plurality of groups of first support mechanisms are stacked with each other in the second state, which can further support the run-flat tire in the abnormal state. Secondly, since the first parts of the plurality of groups of first support mechanisms can be stacked and pressed along the circumferential direction, any one or more groups of the first support mechanisms will not be deformed on one side and concave due to the pressure of the vehicle in the abnormal state, so as to avoid the vehicle from being relatively bumpy in the abnormal state.

[0015] Specifically, the run-flat tire is uniformly stressed when it is in normal operation, at which time the bendable part is not bent, and a gap is left between every two adjacent first parts. When the run-flat tire is in an abnormal state, due to insufficient internal air pressure, the run-flat tire will be subjected to a large and uneven pressure of the vehicle when in contact with the ground (hereinafter referred to as the "pressure side" of the run-flat tire), and the ground will generate a counterforce on the pressure side of the run-flat tire, thereby pressing the bendable part on the pressure side to bend the bendable part. The component force generated by the bent bendable part will drive the first part connected thereto to displace circumferentially until the first part abuts against the adjacent first part.

[0016] Since the run-flat tire is of a ring structure, and the plurality of first support mechanisms are arranged around the air chamber inside the run-flat tire, the adjacent first parts will push each other, which will result in at least two situations. For example, the plurality of first parts on the pressure side are stacked on each other, thereby enhancing the support force on the pressure side, and the circumferential displacement of the first parts on the pressure side will not be pressed into a recess by the pressure of the vehicle, effectively reducing the bumping. For another example, all the first parts outside the air chamber are stacked on each other, thereby enhancing the support force of the entire run-flat tire, and the first parts on the pressure side are also prevented from being recessed.

[0017] Therefore, the run-flat tire of the embodiment has high safety and stability, can further improve the load-bearing performance of the cord layer (i.e., the plurality of first support mechanisms), and greatly reduces the bumping of the vehicle.

[0018] According to another specific embodiment of the present application, each of the first support mechanisms further comprises a connecting rod, one end of the connecting rod is connected with the bead, and the other end of the connecting rod is connected with the one end of the bendable part.

[0019] According to another specific embodiment of the present application, each of the first support mechanisms further comprises a sleeve ring, the sleeve ring is connected with the bead, and the one end of the connecting rod is connected with the sleeve ring.

[0020] According to another specific embodiment of the present application, the bead comprises a first bead and a second bead located on both sides of the run-flat tire, and the two sides of the first part are sequentially connected from outside to inside with the second part, the bendable part, the connecting rod, and the sleeve ring. The second part, the bendable part, the connecting rod, and the sleeve ring on one side are arranged on the first bead, and the second part, the bendable part, the connecting rod, and the sleeve ring on the other side are arranged on the second bead.

[0021] According to another specific embodiment of the present application, the run-flat tire further comprises a hub and an air-tight layer, the tire bead is connected with the hub, and the air-tight layer and the hub are used to define the air chamber; the air chamber is internally provided with a plurality of groups of second support mechanisms, and the plurality of groups of second support mechanisms abut between the air-tight layer and the hub.

[0022] According to another specific embodiment of the present application, each group of the second support mechanisms comprises a support plate and a plurality of telescopic columns, and the support plate of each group of the second support mechanisms abuts the air-tight layer, and the plurality of telescopic columns are connected between the support plate and the hub.

[0023] By using the above technical solution, the air chamber of the run-flat tire according to the embodiments of the present application is located between the tread and the hub, a plurality of groups of second support mechanisms are arranged in the air chamber, the support plate of each group of the second support mechanisms abuts the air-tight layer (i.e. the top of the air chamber), and the plurality of telescopic columns (e.g. telescopic columns with adjustable length) of each group of the second support mechanisms are connected between the support plate and the hub.

[0024] When the run-flat tire is extruded by the vehicle in the above abnormal state, the side (hereinafter referred to as “the extruded side”) that is extruded will extrude the support plate of one of the second support mechanisms at the corresponding position, and the plurality of telescopic columns corresponding to the support plate can support the tread of the extruded side. When the run-flat tire rotates through the extruded side, the plurality of telescopic columns of the extruded side are reset, and are supported by the support plate corresponding to the next extruded side. That is, any one of the second support mechanisms can support the run-flat tire when extruded in the abnormal state, so as to further slow down the bumping and ensure that the vehicle using the run-flat tire can run smoothly under different air pressures.

[0025] According to another specific embodiment of the present application, the support plate is arc-shaped. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic diagram of the run-flat tire according to an embodiment of the present application is shown Figure 1 .

[0027] Figure 2 A three-dimensional schematic diagram of the run-flat tire according to an embodiment of the present application is shown Figure 2 .

[0028] Figure 3 A three-dimensional schematic diagram of the first support mechanism in the run-flat tire according to an embodiment of the present application is shown.

[0029] Figure 4 A three-dimensional schematic diagram of the second support mechanism in the run-flat tire according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Although the description of the present application will be introduced in combination with the preferred embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] The terms "first", "second", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present embodiment, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail in combination with the drawings.

[0036] Reference Figure 1 and Figure 2The application provides a run-flat tire 100. A vehicle equipped with the run-flat tire 100 can continue to run for a distance in a flat tire condition without generating a large bump.

[0037] Although the vehicle equipped with the run-flat tire 100 is not shown herein, it can be understood that the vehicle includes but is not limited to a car, a sport utility vehicle, a van, a truck, a trailer, a motorcycle, a bicycle, and other vehicles that need to be equipped with a vacuum run-flat tire.

[0038] The run-flat tire 100 of the application includes a tread 110, a sidewall 120, a bead 130, a carcass 140, an air chamber 150 (as shown in Figure 2 ), and a wheel hub 160.

[0039] The tread 110 is located at the top of the outer side of the carcass 140. The tread 110 is a rubber layer directly contacting the ground, and a pattern (not shown in the figure) for increasing friction is arranged on the tread 110. The sidewall 120 is located on both sides of the carcass 140, and the sidewall 120 can connect the tread 110 and the bead 130. During the manufacturing process, the tread 110, the sidewall 120, and the carcass 140 can be co-molded.

[0040] The carcass 140 provides a shape for the air chamber 150. The carcass 140 includes the first support mechanism 170 described below, and also includes structures such as a steel wire belt layer (not shown in the figure).

[0041] The bead 130 can be mounted on the rim of the wheel hub 160. When the air chamber 150 (as shown in Figure 2 ) located between the tread 110 and the wheel hub 160 is inflated, the air pressure drives the bead 130 to tightly adhere to the inner side of the rim, so that the bead 130 is tightly connected to the wheel hub 160 together with the tread 110, the sidewall 120, and the carcass 140.

[0042] Continuing to refer to Figure 1 and Figure 2 , the run-flat tire 100 further includes a plurality of groups of the first support mechanism 170. Each group of the first support mechanism 170 is arranged around the air chamber 150. One side (as indicated by the e direction in Figure 1 ) of each group of the first support mechanism 170 corresponds to the tread 110, and the other side (as indicated by the f direction in Figure 1 ) of each group of the first support mechanism 170 is connected to the bead 130.

[0043] Referring to Figure 3 and in combination with Figure 2Each group of the first supporting mechanism 170 comprises a movable part 171 and a foldable part 172 connected with each other. The movable part 171 comprises a first part 1711 and a second part 1712.

[0044] It can be seen that the first part 1711 extends along a first direction (e.g. the A direction shown in Figure 2 and Figure 3 ) and is located on the top surface of the air chamber 150 (which is also the air-tight layer described later).

[0045] The second part 1712 extends along a radial direction (e.g. the T direction shown in Figure 2 and Figure 3 ) and is located on the two side surfaces of the air chamber 150. One end of the second part 1712 (i.e. the end pointed by the T1 direction in Figure 3 ) is connected with the first part 1711. Exemplarily, the above-mentioned first direction (e.g. the A direction shown in Figure 3 ) and the radial direction (e.g. the T direction shown in Figure 3 ) intersect with each other.

[0046] Meanwhile, the above-mentioned foldable part 172 also extends along the radial direction (e.g. the T direction shown in Figure 2 and Figure 3 ) and is located on the two side surfaces of the air chamber 150.

[0047] The foldable part 172 comprises a first end 1721 and a second end 1722 arranged oppositely, as shown in Figure 3 , the first end 1721 of the foldable part 172 is connected with the other end of the second part 1712 (i.e. the end pointed by the T2 direction in Figure 3 ), and the second end 1722 of the foldable part 172 is connected with the bead 130.

[0048] Further, the run-flat tire 100 of the embodiment can comprise a normal state and an abnormal state. When the run-flat tire 100 is in the normal state, the vehicle using the run-flat tire 100 can run normally, and at this time, the above-mentioned first supporting mechanism 170 inside the run-flat tire 100 is in a first state.

[0049] Figure 2 Exemplarily, all the first supporting mechanisms 170 are in the first state. Figure 3 Exemplarily, a perspective view of the first supporting mechanism 170 in the first state is shown.

[0050] In the first state, the foldable part 172 of each group of the first supporting mechanism 170 still extends along the radial direction (e.g. the T direction shown in Figure 3 ), without being folded, and meanwhile, the first part 1711 and the first part 1711 adjacent thereto are provided with a gap L (e.g. the gap L shown in Figure 2(As shown). This application does not limit the length of the gap L, nor does it specifically limit whether the gap L between any two adjacent first parts 1711 is equal. As long as the gap L length is sufficient for the first support mechanism 170 to switch from the first state to the second state, it falls within the protection scope of this application.

[0051] When the run-flat tire 100 is in an abnormal state (such as leaking air, low air pressure, or a blowout), it can still enable the vehicle to continue to travel without causing significant bumps. At this time, the first support mechanism 170 inside the run-flat tire 100 switches to the second state.

[0052] refer to Figures 1 to 3 ,Although Figures 1 to 3 The second state of the first support mechanism 170 is not shown, but it can be understood that when the run-flat tire 100 is in an abnormal state, the pressure side of the run-flat tire 100 (the side that contacts the ground when rotating, for example...) Figure 1 and Figure 2 The first portion 1711 (shown as the dashed area S) will be subjected to the pressure of the tread 110 at that location. For example, the first portion 1711 in... Figures 1 to 3 The image shows the pressure exerted by the tire tread 110 along the B direction.

[0053] Then, the second part 1712, which is connected to the first part 1711, will cause the bendable part 172 to bend (e.g., along...). Figure 3 If the first part 1711 bends in the C direction as shown, then it will move further along the second direction (e.g., along the C direction). Figure 2 and Figure 3 (as shown by moving in the D direction), thereby enabling the first part 1711 adjacent to it to be pushed.

[0054] Because the run-flat tire 100 is a closed ring, adjacent first portions 1711 push against each other, eventually at least one of the first portions 1711 (e.g.) Figure 2 The several groups of first parts 1711 shown in the dashed area S, for example, the first parts 1711 of all the first support mechanisms 170, will be stacked on each other (stacked on each other means that there is no gap L between adjacent first parts 1711). At this time, the first support mechanism 170 is in the second state. After multiple groups of first support mechanisms 170 are stacked, they can generate a large support force. Moreover, the first first part 1711 that is pressed against the tread in the B direction will not continue to be concave along the B direction after being stacked, thus avoiding the situation where the vehicle is unstable and bumpy due to unilateral concavity.

[0055] The number of first support mechanisms 170 in this application embodiment is not limited. As long as they can switch from the first state to the second state, they are all within the protection scope of this application embodiment.

[0056] In addition, the extension direction of the first portion 1711 (i.e., the first direction described above), the extension direction of the second portion 1712 and the bendable portion 172 (i.e., the radial direction described above) are not specifically limited in the embodiments of the present application. For example, the first portion 1711 can also have other shapes such as an arc shape, a wave shape, etc., and the second portion 1712 and the bendable portion 172 can also have shapes such as a wave shape, an arc shape, etc. The foregoing is only exemplary and is not limited thereto.

[0057] With the above technical solution, the multiple groups of first support mechanisms 170 of the run-flat tire 100 can be switched from the first state (the state corresponding to the first support mechanism 170 when the run-flat tire 100 is normally working) to the second state (the state corresponding to the first support mechanism 170 when the run-flat tire 100 is in an abnormal state such as a tire puncture, a tire leak or a tire burst).

[0058] First, the multiple groups of first support mechanisms 170 are stacked with each other in the second state, which can further support the run-flat tire 100 in the abnormal state. Second, since the first portions 1711 of the multiple groups of first support mechanisms 170 can be stacked and pressed in the circumferential direction, any one or more groups of first support mechanisms 170 will not be deformed unilaterally and concave due to the pressure of the vehicle in the abnormal state, so as to avoid the vehicle from being more bumpy in the abnormal state.

[0059] Specifically, when the run-flat tire 100 is normally working, the force is uniform, at this time, the bendable portion 172 is not bent, and a gap (e.g., a gap L) is left between every two adjacent first portions 1711. When the run-flat tire 100 is in an abnormal state, due to insufficient internal air pressure, when in contact with the ground, the run-flat tire 100 will be subjected to a large and uneven pressure of the vehicle (hereinafter referred to as the "pressure side" of the run-flat tire 100), and the ground will generate a counterforce on the pressure side of the run-flat tire 100, thereby pressing the bendable portion 172 on the pressure side to make the bendable portion 172 bend. The component force generated after the bendable portion 172 bends will drive the first portion 1711 connected thereto to displace in the circumferential direction until the first portion 1711 abuts against the adjacent first portion 1711.

[0060] Since the run-flat tire 100 is annular in structure, and the first support mechanisms 170 are arranged around the air chamber inside the run-flat tire 100, the adjacent first portions 1711 will push each other, which will result in at least two situations: for example, the first portions 1711 on the pressure receiving side are stacked on each other, thereby enhancing the support force on the pressure receiving side, and the first portions 1711 on the pressure receiving side are displaced in the circumferential direction and thus will not be pressed into the recess by the pressure of the vehicle, effectively reducing the bumping. For another example, all the first portions 1711 outside the air chamber are stacked on each other, thereby enhancing the support force of the entire run-flat tire 100, and the first portions 1711 on the pressure receiving side are also avoided from being recessed.

[0061] Therefore, the run-flat tire 100 has higher safety and stability, can further improve the load-bearing performance of the first support mechanisms 170 (i.e., the plurality of groups of first support mechanisms 170), and greatly reduces the bumping of the vehicle.

[0062] According to the foregoing, the second end 1722 of the bendable portion 172 is connected to the bead 130.

[0063] Reference Figure 3 and in combination Figure 2 In some possible embodiments, each group of first support mechanisms 170 further includes a connecting rod 173, which is used to connect the bendable portion 172 to the bead 130. It can be seen that the connecting rod 173 extends in the radial direction (e.g., the T direction shown in FIG. 1), one end of the connecting rod 173 is connected to the bead 130, and the other end of the connecting rod 173 is connected to one end of the bendable portion 172. Figure 3

[0064] In some possible embodiments, each group of first support mechanisms 170 further includes a sleeve 174, which is sleeved on the outer surface of the bead 130, and one end of the connecting rod 173 is connected to the sleeve 174.

[0065] In some possible embodiments, the bead 130 includes a first bead 131 and a second bead 132 on both sides, and the first portion 1711 of the movable portion 171 includes a third end 17111 and a fourth end 17112, as shown in FIG. 1, it can be seen that the first bead 131 is located on one side of the third end 17111, and the second bead 132 is located on one side of the fourth end 17112. Figure 3

[0066] At the same time, the third end 17111 of the first portion 1711 is sequentially connected to a group of the second portion 1712, the bendable portion 172, the connecting rod 173, and the sleeve 174 from outside to inside (e.g., the T2 direction shown in FIG. 1). Figure 3

[0067] ​​​The fourth end 17112 of the first part 1711 is also connected from the outside to the inside to another set of the second part 1712, the bendable part 172, the connecting rod 173 and the collar 174.

[0068] refer to Figure 1 , Figure 2 and Figure 4 In some possible implementations, the air chamber 150 is defined by an airtight layer 151, a hub 160, and a sidewall 120, such as Figure 2 As shown, the air chamber 150 is equipped with multiple sets of second support mechanisms 180, which are arranged radially (e.g., ...). Figure 2 (as shown in the T direction), one side of each group of second support mechanisms 180 (such as...) Figure 2 and Figure 4 The side indicated by the T2 direction) is connected to the wheel hub 160, and the other side of each set of second support mechanisms 180 (as shown in the image) Figure 2 and Figure 4 The airtight layer 151 is supported on the side indicated by the T1 direction.

[0069] refer to Figure 4 and combined Figure 2 In some possible implementations, each group of second support mechanisms 180 includes a support plate 181 and a plurality of telescopic columns 182, with the support plate 181 abutting against the airtight layer 151. Exemplarily, the support plate 181 is an arc-shaped plate. The plurality of telescopic columns 182 in each group of second support mechanisms 180 are spaced apart and extend radially, with one end of each telescopic column 182 (e.g., ...) Figure 2 The end of the telescopic column 182 (as indicated by T1) is connected to the support plate 181, and the other end of the telescopic column 182 (as indicated by T1) is connected to the support plate 181. Figure 2 The end (pointed to in the T2 direction) is connected to the hub 160.

[0070] This application does not limit the number of second support mechanisms 180; any mechanism that can provide support is within the protection scope of this application. Correspondingly, this application does not specifically limit the number of telescopic columns 182 in each group of second support mechanisms 180; any column that can extend and retract radially and provide support is within the protection scope of this application.

[0071] Using the above technical solution, the air chamber 150 of the run-flat tire in this embodiment is located between the tread 110 and the wheel hub 160. Multiple sets of second support mechanisms 180 are provided in the air chamber 150. The support plate 181 of each set of second support mechanisms 180 abuts against the airtight layer 151 (that is, the top of the air chamber 150). Multiple telescopic columns 182 of each set of second support mechanisms 180 are connected between the support plate 181 and the wheel hub 160.

[0072] When the run-flat tire is pressed by the vehicle in the abnormal state, the side being pressed (hereinafter referred to as "the pressed side") presses the support plate 181 of one of the second support mechanisms 180 at the corresponding position, and the plurality of telescopic columns 182 corresponding to the support plate 181 support the tread 110 of the pressed side. When the run-flat tire rotates through the pressed side, the plurality of telescopic columns 182 of the pressed side are reset and are supported by the support plate 181 corresponding to the next pressed side. That is, any one of the second support mechanisms 180 can support the run-flat tire when it is pressed in the abnormal state, so as to further slow down the bumping and ensure that the vehicle using the run-flat tire can smoothly run under different air pressures.

[0073] Although the utility model has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood that the above description is a further detailed description of the utility model in connection with specific embodiments and cannot be deemed as a limitation of the specific implementation of the utility model. Those skilled in the art can make various changes in form and details without departing from the spirit and scope of the utility model, including making a number of simple deductions or substitutions.

Claims

1. A run-flat tire characterized by, From outside to inside, the tire includes a tread, a chamber and a tire bead in sequence, the tread is connected with the tire bead, the chamber is located between the tread and the tire bead, and the tire further includes: a plurality of groups of first support mechanisms, the plurality of groups of first support mechanisms are arranged around the chamber, each group of the first support mechanisms includes a movable part and a foldable part connected with each other; the movable part includes a first part and a second part, the first part is located on the top surface of the chamber, and the second part is located on the side surface of the chamber, one end of the second part is connected with the first part; the foldable part is located on the side surface of the chamber, one end of the foldable part is used for being connected with the tire bead, and the other end of the foldable part is connected with the other end of the second part; wherein, the plurality of groups of first support mechanisms are used for switching from a first state to a second state; in the first state, the foldable part of each group of the first support mechanisms is not folded, and a gap is arranged between the first parts of adjacent first support mechanisms; in the second state, the foldable part of at least one group of the first support mechanisms is folded, the corresponding first part of the folded foldable part and the first part adjacent to the folded foldable part are stacked in the circumferential direction.

2. Tyre according to Claim 1, characterized in that, each group of the first support mechanisms further includes a connecting rod, one end of the connecting rod is connected with the tire bead, and the other end of the connecting rod is connected with the one end of the foldable part.

3. Tyre according to Claim 2, characterized in that, each group of the first support mechanisms further includes a sleeve ring, the sleeve ring is connected with the tire bead, and the one end of the connecting rod is connected with the sleeve ring.

4. Tyre according to Claim 3, characterized in that, the tire bead includes a first tire bead and a second tire bead located on both sides of the tire, and the first part is connected with the second part, the foldable part, the connecting rod and the sleeve ring in sequence from outside to inside on both sides of the first part, wherein the second part, the foldable part, the connecting rod and the sleeve ring on one side are arranged on the first tire bead, and the second part, the foldable part, the connecting rod and the sleeve ring on the other side are arranged on the second tire bead.

5. The run-flat tire of claim 1, wherein, the tire further includes a hub and an air-tight layer, the tire bead is connected with the hub, and the air-tight layer and the hub are used for defining the chamber; the inside of the chamber is provided with a plurality of groups of second support mechanisms, and the plurality of groups of second support mechanisms are abutted between the air-tight layer and the hub.

6. Tyre according to Claim 5, characterized in that, each group of the second support mechanisms includes a support plate and a plurality of telescopic columns, the support plate of each group of the second support mechanisms is abutted to the air-tight layer, and the plurality of telescopic columns are connected between the support plate and the hub.

7. Tyre according to Claim 6, characterized in that, the support plate is in an arc shape.

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