Antiskid chain for tire

Abstract

The invention provides an antiskid chain for a tire. The antiskid chain comprises an antiskid chain body, a tightener, an anchor point connecting piece and a tightening rope. The antiskid chain body is an annular chain and is used for being installed on a tire crown of a tire. The tightener is detachably connected with the antiskid chain body and used for adjusting the diameter of the ring defined by the antiskid chain body. The multiple anchor point connecting pieces are arranged in the circumferential direction of the antiskid chain body at intervals. Each anchor point connecting piece is fixedly connected with the antiskid chain body, each anchor point connecting piece comprises a first end and a second end which are oppositely arranged, the first end is the end, used for being installed close to the inner side of a tire, of the anchor point connecting piece, and the first end is used for being installed on a tire crown of the tire. The tightening ropes are made of textile materials and / or rubber materials and comprise the first tightening rope and the second tightening rope, the first tightening rope is connected with each first end, and the second tightening rope is connected with each second end. The antiskid chain for the tire has the advantages of being light in total weight and high in safety.

Description

Technical Field

[0001] The present application relates to the technical field of automobile anti-skid devices, and in particular to an anti-skid chain for tires. Background Art

[0002] In winter or in severe weather conditions, the road surface on which vehicles drive is prone to ice or snow. In order to ensure driving safety, many car owners will install anti-skid chains to increase the friction between the tires and the ground and reduce the accident rate.

[0003] During the process of implementing this application, the inventors discovered that the prior art has at least the following problems:

[0004] The anti-skid chains in the prior art are provided with metal chain structures on the contact surface between the tire and the ground (that is, the tread) and the side of the tire. However, since the distance between the car tire and the shock absorber is very small, the chain on the inner side of the tire is easy to rub against the shock absorber and cause a safety hazard. In addition, the chain on the side of the tire is easy to rub against the wheel hub, causing wear of the wheel hub. Summary of the Invention

[0005] Based on this, the present application provides an anti-skid chain for tires to solve the problem in the prior art that safety accidents may easily occur due to friction between the anti-skid chain and the shock absorber.

[0006] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0007] The embodiment of the present application provides an anti-skid chain for a tire, comprising an anti-skid chain body, a tightener, an anchor point connecting piece, and a tightening rope;

[0008] The anti-skid chain body is an endless chain connected end to end, and is used to be installed on the crown of the tire;

[0009] The tightener is detachably connected to the anti-skid chain body and is used to adjust the diameter of the ring formed by the anti-skid chain body;

[0010] There are multiple anchor connection pieces, and the multiple anchor connection pieces are spaced apart along the circumference of the anti-skid chain body; each anchor connection piece is fixedly connected to the anti-skid chain body, and the anchor connection piece includes a first end and a second end that are oppositely arranged, the first end being an end of the anchor connection piece for mounting close to the inner side of the tire, and the first end is for mounting on the tire crown;

[0011] The tightening cord is made of a textile material and / or a rubber material, and includes a first tightening cord and a second tightening cord, wherein the first tightening cord is connected to each of the first ends respectively, and the second tightening cord is connected to each of the second ends respectively.

[0012] In one embodiment, the tightening rope is an elastic rope with telescopic function.

[0013] In one embodiment, each of the anchor point connecting plates includes a first plate and a second plate that are connected to each other, wherein the end of the first plate away from the second plate is the first end, one end of the second plate is connected to the first plate, and the other end of the second plate is the second end; the first plate is used to contact the crown, and the second plate is used to contact the outer side of the tire.

[0014] In one embodiment, the length of the first plate is smaller than the thickness of the tire.

[0015] In one embodiment, a first connecting hole is formed near the first end of the first plate, a first connecting portion is formed outside the first connecting hole, and an outer surface of the first connecting portion is lower than an outer surface of the first plate;

[0016] A second connecting hole is formed on the second plate body near the second end, and a second connecting portion is formed on the outer side of the second connecting hole.

[0017] In one embodiment, the tire anti-skid chain further includes a pull belt, and ends of the pull belt are respectively installed in the second connecting holes.

[0018] In one embodiment, the force pulling belt is made of textile material, and the force pulling belt includes a plurality of strips, one end of each of the strips is fixedly connected at a connection point, and the other end of each of the strips is respectively connected to the corresponding second connection hole.

[0019] In one embodiment, the connection length of the pull belt is adjustable to change the distance between the connection point and the corresponding second connection part.

[0020] In one embodiment, the anti-skid chain body includes a first chain and a second chain arranged at intervals, and the ring formed by the first chain and the second chain is of the same size; the anti-skid chain body also includes a support bar, and a plurality of the support bars are arranged at intervals along the circumference of the anti-skid chain body, one end of the support bar is connected to the first chain, and the other end of the support bar is connected to the second chain, so that the first chain and the second chain are kept at an interval.

[0021] In one embodiment, the tensioner includes a first body portion and a second body portion, the first body portion is used to be fixed on the first chain, and the second body portion is used to be fixed on the second chain; the tensioner is configured as follows: the first body portion and the second body portion are detachably connected to change the diameter of the ring formed by the anti-skid chain body.

[0022] The present application has at least the following beneficial effects: the anti-skid chain for tires provided by the present application has the anti-skid chain body installed on the tire crown to provide greater friction to the tire, thereby achieving an anti-skid effect on the tire. The tightening rope is located on both sides of the tire. The tightening rope is a non-metallic part that can be made of textile material and / or rubber material. It has a relatively thin thickness. After the tightening rope and the anchor connecting piece are connected, they can be close to the side of the wheel and are not likely to rub against the shock absorber on the inner side of the tire, thereby improving driving safety. The anchor connecting piece of the present application has a first end that is close to the inner side of the tire. After the anchor connecting piece is installed, the first end is located on the tire crown, preventing the anchor connecting piece from protruding from the side of the tire and rubbing against the shock absorber, further improving driving safety. At the same time, the tightening rope of the present application is made of non-metallic material, which is lighter and smaller in size than the traditional chain structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the tire anti-skid chain installed on a tire in use according to an embodiment of the present application.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the tire anti-skid chain on the outer part of the tire.

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the tire anti-skid chain on the inner side of the tire.

[0026] Figure 4 This is a schematic structural diagram of some components of the tire anti-skid chain according to an embodiment of the present application (part of the anti-skid chain body is cut off to illustrate the state of the tensioner when it is installed).

[0027] Figure 5 This is a schematic structural diagram of some components of the tire anti-skid chain according to an embodiment of the present application (part of the anti-skid chain body is cut off to illustrate the structure of the tensioner in the non-installed state and the arrangement of the various components).

[0028] The meanings of the reference numerals in the accompanying drawings are as follows:

[0029] 1. Anti-skid chain body; 11. First chain; 12. Second chain; 13. Support bar;

[0030] 2. tightener; 21. first body; 22. second body; 23. bolt; 24. spring;

[0031] 3. Anchor connecting piece; 31. First plate; 311. First end; 312. First connecting hole; 313. First connecting portion; 32. Second plate; 321. Second end; 322. Second connecting hole; 323. Second connecting portion;

[0032] 4. Tightening rope; 41. First tightening rope; 42. Second tightening rope;

[0033] 5. Pull belt;

[0034] 100. Tire; 101. Crown. DETAILED DESCRIPTION

[0035] The technical solution of this application is further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit the implementation of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] In the description of this application, it should be understood that the terms "center," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] See also Figures 1 to 3 The anti-skid chain for tire 100 of the embodiment of the present application includes an anti-skid chain body 1, a tightener 2, an anchor point connecting piece 3 and a tightening rope 4.

[0040] The anti-skid chain body 1 is a circular chain connected end to end, and is used to be installed on the tread 101 of the tire 100. Because the anti-skid chain body 1 is formed by a structure formed by connecting multiple metal rings, it does not have a fixed overall shape. The circular shape here refers to the shape of the anti-skid chain body 1 after it is supported. For example, when the anti-skid chain body 1 is stretched through the tire 100, it forms a circular chain that is installed around the tread 101.

[0041] The tensioner 2 is detachably connected to the anti-skid chain body 1 and is used to adjust the diameter of the ring formed by the anti-skid chain body 1. The tensioner 2 can be installed or removed from the anti-skid chain body 1 according to specific needs, and the number of tensioners 2 installed on the anti-skid chain body 1 can be selected as needed. The more tensioners 2 installed on the anti-skid chain body 1, the smaller the diameter of the ring formed by the anti-skid chain body 1. The user can select the appropriate number of tensioners 2 based on the diameter of the tire 100 to be installed.

[0042] The number of anchoring plates 3 can be multiple, and the multiple anchoring plates 3 are spaced apart along the circumference of the anti-skid chain body 1. Each anchoring plate 3 is fixedly connected to the anti-skid chain body 1. The anchoring plates 3 include a first end 311 and a second end 321 that are arranged opposite each other. The first end 311 is the end of the anchoring plate 3 that is installed near the inner side of the tire 100. The first end 311 is used to install on the tread 101 of the tire 100. The number of anchoring plates 3 can be, for example, three, four, or more. This embodiment uses four anchoring plates 3 as an example. The four anchoring plates 3 are evenly distributed along the circumference of the anti-skid chain body 1. After the anti-skid chain is installed on the tire 100, the first end 311 of the anchoring plate 3 is always located on the tread 101 to prevent the anchoring plate 3 from protruding from the sidewall of the tire 100 and rubbing against other nearby structural components of the tire 100, thereby improving safety in use.

[0043] The tightening cord 4 is made of a textile material and / or a rubber material and includes a first tightening cord 41 and a second tightening cord 42. The first tightening cord 41 is connected to each first end 311, and the second tightening cord 42 is connected to each second end 321. Made of a lightweight, non-metallic material, the tightening cord 4 helps reduce the overall weight of the anti-skid chain. Compared to metal chains, the tightening cord 4 is thinner and less likely to scratch other components inside the tire 100, providing greater safety. In this embodiment, the tightening cord 4 is a retractable elastic cord, such as an elastic band or rubber band. The diameter of the loop formed by the tightening cord 4 in its free state is smaller than the diameter of the tire 100. The first and second tightening cords 41, 42 are located on either side of the anti-skid chain body 1, tightening the tire 100 on both sides, effectively securing the anti-skid chain body 1 to the tire crown 101. If the anti-skid chain body 1 deviates, the tightening cord 4 can correct the deviation. At the same time, since the elastic rope is elastic, it is also very convenient to install the anti-skid chain on the tire 100. It is only necessary to put the anti-skid chain body 1 from the outside of the tire 100, and the elastic rope can be automatically tightened without manual operation.

[0044] like Figure 1 and Figure 4As shown, the anchor link 3 of this embodiment can be made of polyurethane (PU) or other plastic materials. Using a non-metallic material not only ensures wear resistance but also effectively reduces the overall weight of the anti-skid chain. Each anchor link 3 comprises a first plate 31 and a second plate 32, each of which is connected. The first plate 31 has a first end 311 at its end facing away from the second plate 32. One end of the second plate 32 is connected to the first plate 31, and the other end of the second plate 32 is a second end 321. The first plate 31 is designed to contact the tread 101, while the second plate 32 is designed to contact the outer side of the tire 100. Specifically, the first end 311 of the first plate 31 is free, with the other end connected to the second plate 32; the second end 321 of the second plate 32 is free, with the other end connected to the first plate 31. The first and second plates 31, 32 are arranged at an angle, approximately perpendicular to each other, to ensure proper fit with the tread 101 and the sidewall of the tire 100, respectively. In order to prevent the first end 311 of the first plate 31 from protruding from the sidewall of the tire 100 and causing a safety hazard, the length of the first plate 31 can be slightly smaller than the thickness of the tire 100. Here, the length of the first plate 31 is the length of the first plate 31 along the axial direction of the tire 100 ( Figure 4The length in the L direction (in the L direction in FIG), and the thickness of the tire 100 is the distance from one surface of the tire 100 to the other surface of the tire 100. If the length of the first plate 31 is less than the thickness of the tire 100, it can be ensured that the first end 311 of the first plate 31 does not extend outside the crown 101 of the tire 100 and does not interfere with other components, thereby improving driving safety. To facilitate the connection of the anchor connecting piece 3 with components such as the tightening rope 4, a first connecting hole 312 can be opened near the first end 311 of the first plate 31. A first connecting portion 313 is provided on the outside of the first connecting hole 312. The outer surface of the first connecting portion 313 is lower than the outer surface of the first plate 31 (the surface away from the side of the tire 100). Here, the outer surface refers to the surface away from the crown 101 of the tire 100 during installation. During use, the tightening rope 4 can be inserted into the first connecting hole 312. After the tightening rope 4 is inserted, it can be fixed via the first connecting portion 313 on the outside of the first connecting hole 312. For example, one end of the tightening rope 4 can be fixedly connected to the first connecting portion 313. Because the outer surface of the first connecting portion 313 is slightly lower than the outer surface of the first plate 31, the tightening cord 4 or other connecting components can be hidden in the recess formed by the first connecting portion 313, preventing wear and tear during vehicle operation and extending the service life of the anti-skid chain. The second plate 32 defines a second connecting hole 322 near the second end 321, with a second connecting portion 323 located outside the second connecting hole 322. Accordingly, the second connecting hole 322 can be designed similarly to the first connecting hole 312, with the outer surface of the second connecting portion 323 lower than the outer surface of the second plate 32. This allows connected components to be hidden in the recess formed by the second connecting portion 323, reducing wear and tear. Alternatively, both sides of the first connecting portion 313 can be lower than the corresponding surface height of the first plate 31, and both sides of the second connecting portion 323 can be lower than the corresponding surface height of the second plate 32, further reducing wear and tear on the connecting components at the connecting holes.

[0045] like Figure 1 and Figure 2As shown, to further enhance the installation reliability of the anti-skid chain and prevent the anti-skid chain body 1 from falling off or shifting during vehicle operation, some embodiments may also include a tensioning strap 5. In this embodiment, the tensioning strap 5 is made of a textile material, such as ordinary cloth, nylon, polyamide, polyester, or the like. The tensioning strap 5 can include multiple straps, each of which is fixedly connected at one end at a connection point, and each of which is connected to a corresponding second connection hole 322 at its other end. In this embodiment, where four anchor point connectors 3 are provided, the number of corresponding straps is also four. The four straps are arranged in a cross shape. Here, the four straps refer to the four straps that are fixedly connected in the middle to form four end portions. The four straps can be four independent strips of cloth fixedly connected at one end, or two long strips of cloth fixedly connected in the middle to form four end portions. Here, the strap refers to the section from the middle connection point to the end portion. The ends of the tensioning strap 5 pass through the second connection hole 322 and connect to the second connection portion 323. For example, the straps on both sides of the second connection portion 323 can be sewn together. In other embodiments, the pull strap 5 can be configured with an adjustable length to change the distance between the connection point and the corresponding second connection portion 323. For example, the adjustable length structure can be provided with a spherical buckle similar to a backpack strap, and the adjustment principle is the same as that of a backpack strap. Adjusting the length of the pull strap 5 can better match the size of the tire 100 to be installed.

[0046] A through-hole can be defined in the second plate 32 of the anchor connecting piece 3, near the second end 321. This through-hole extends along the width W of the second plate 32 and is used to thread the second tightening cord 42. Of course, the second tightening cord 42 can also be installed in other ways. In this embodiment, the second tightening cord 42 is a single long cord, with one end of the second tightening cord 42 sequentially inserted through the corresponding through-holes along the circumference of the anti-skid chain body 1 and then connected end to end. In other embodiments, the second tightening cord 42 can also be a plurality of short cords. For example, the ends of the second tightening cord 42 can be connected to the second ends 321 of two adjacent anchor connecting pieces 3.

[0047] like Figure 3As shown, the first tightening rope 41 can be a long rope, and one end of the first tightening rope 41 is sequentially passed through the first connecting holes 312 along the circumference of the anti-skid chain body 1, and then connected end to end. Alternatively, a fixing strip can be connected to each first connecting hole 312, and the fixing strip can be made of textile material. After the fixing strip is passed through the first connecting hole 312, the fixing strips on both sides of the first connecting portion 313 are sewn and fixed, and then the first tightening rope 41 and each fixing strip are sewn and fixed to form a tightening ring. Alternatively, a through hole can be provided at the fixing strip, and the setting direction of the through hole is the same as the setting direction of the first connecting portion 313 (that is, along the circumferential direction of the anti-skid chain body 1). One end of the first tightening rope 41 is sequentially passed through the through hole, and finally connected end to end.

[0048] The first tightening rope 41 and the second tightening rope 42 are both made of elastic material, and can be effectively and automatically tightened on the side of the tire 100 without manual tightening, making the installation of the anti-skid chain convenient and reliable.

[0049] like Figure 4 and Figure 5 As shown, the anti-skid chain body 1 of this embodiment includes a first chain 11 and a second chain 12 spaced apart. The ring formed by the first and second chains 11, 12 is of equal size. The anti-skid chain body 1 also includes support bars 13 spaced apart along the circumference of the anti-skid chain body 1. One end of each support bar 13 is connected to the first chain 11, and the other end of each support bar 13 is connected to the second chain 12, thereby maintaining a distance between the first and second chains 11, 12. The anti-skid chain body 1 is made entirely of metal. The support bars 13 can be, for example, a metal plate. Before the support plate is attached to the first and second chains 11, 12, slots are formed near each end of the support plate. After the first and second chains 11, 12 are placed in their respective slots, the slots are welded together, preventing the first and second chains 11, 12 from falling off. The support bars 13 maintain a certain distance between the first and second chains 11, 12, thereby providing a better anti-skid effect. The number of support bars 13 can be selected according to actual needs. The structure and installation method of the support bar 13 are not limited to the above-mentioned method, as long as it can separate the first chain 11 and the second chain 12.

[0050] The anchor connecting piece 3 is detachably connected to the anti-skid chain body 1. For example, two fixing grooves can be defined along the width direction W of the first plate 31 of the anti-skid chain body 1. The first chain 11 and the second chain 12 are placed in the two fixing grooves, respectively. A through hole is defined along the length direction L of the first plate 31 for receiving a bolt or other connecting member. The length of the through hole is greater than the distance between the two fixing grooves, and the through hole passes through both fixing grooves, allowing the bolt to simultaneously pass through a metal ring of the chain when inserted into the through hole. Tightening the bolts can relatively secure the first chain 11, the second chain 12, and the anchor connecting piece 3. To improve connection reliability, two through holes can be defined side by side along the length direction L of the first plate 31, and the anti-skid chain body 1 can be secured with two bolts.

[0051] The tensioner 2 of this embodiment includes a first body portion 21 and a second body portion 22. The first body portion 21 is used to be fixed to the first chain 11, and the second body portion 22 is used to be fixed to the second chain 12. The tensioner 2 is configured such that the first body portion 21 and the second body portion 22 are detachably connected to change the diameter of the ring formed by the anti-skid chain body 1. For example, the tensioner 2 of this embodiment is provided with a first groove on the first body portion 21 and a second groove on the second body portion 22. The first groove is used to pass through the first chain 11, and the second groove is used to pass through the second chain 12 (the first chain 11 and the second chain 12 are provided to distinguish between the two chains. Here, it can be understood that the first groove is used to pass through one of the chains, and the second groove is used to pass through the other chain). Mounting holes are respectively opened in the center of the first body portion 21 and the second body portion 22 along the arrangement direction of the first body portion 21 and the second body portion 22. The mounting holes are used to install bolts 23 and other connecting parts. The mounting hole passes through the first groove and the second groove, so that the bolt 23 can pass through the mounting hole from the outer end of the second main body 22, pass through a metal ring of the second chain 12, and then pass through the mounting hole of the first main body 21 from the inner end, pass through a metal ring of the first chain 11, and then pass out of the first main body 21. Tighten the bolt 23 so that the first chain 11 and the second chain 12 here are relatively close, thereby reducing the diameter of the ring formed by the anti-skid chain body 1. The mounting hole can also be set as a stepped hole, and a spring part 24 is set in the stepped hole to prevent the bolt 23 from loosening. The first main body 21 and the second main body 22 can be made of metal material or non-metallic material. The more tighteners 2 are installed on the anti-skid chain body 1, the shorter the circumferential length of the anti-skid chain body 1 will eventually be (the smaller the diameter of the enclosed ring). As Figure 4 and Figure 5As shown, when the first body 21 and the second body 22 of the tensioner 2 are fixedly connected, the first chain 11 and the second chain 12 are brought closer to each other, so that the circumference of the ring formed by the anti-skid chain body 1 becomes shorter. When the first body 21 and the second body 22 are separated, the first chain 11 and the second chain 12 are parallel to each other. When all the tensioners 2 are in a state where the two body parts (the first body 21 and the second body 22) are separated, the ring formed by the anti-skid chain body 1 has the largest circumference. Figure 4 and Figure 5 In the figure, for the convenience of explanation, when the first main body part 21 and the second main body part 22 are separated, the two are still retained on the corresponding chain (the first chain 11 or the second chain 12). This is for comparison with the state when the first main body part 21 and the second main body part 22 are fixedly connected. In actual use, when there is no need to use some tighteners 2 to adjust the total circumference of the anti-skid chain, there is no need to install these tighteners 2. That is to say, if they have been installed before, they can be directly removed from the anti-skid chain body 1.

[0052] The tire chain provided in the embodiments of the present application utilizes two chains arranged along the circumference of the tire and a separating support strip to effectively prevent slippage and provide continuous friction. The chain's main body is devoid of any metal components. Both the tightening cord and the tensioning strap are made of non-metallic materials and are relatively thin, preventing interference with suspension systems such as the shock absorber inside the tire. By installing a tightener on the chain's main body and bolting the two main parts together, the chain's circumference can be shortened, ensuring a tight fit against the tire. This design also accommodates tires of varying sizes. The tightening cord in the embodiments of the present application is made of an elastic material. Once the chain is attached to the tire, the elastic force of the cord automatically tightens the chain, eliminating the need for manual adjustment and making it extremely convenient to use. Aside from the chain's main body, which increases resistance to the tire, all other components are primarily made of non-metallic materials, reducing costs, overall weight, and overall portability.

[0053] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0054] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A tire anti-skid chain, characterized in that: It includes an anti-skid chain body, a tightener, an anchor point connecting piece and a tightening rope; The anti-skid chain body is an endless chain connected end to end, and is used to be installed on the crown of the tire; The tightener is detachably connected to the anti-skid chain body and is used to adjust the diameter of the ring formed by the anti-skid chain body; There are multiple anchor connection pieces, and the multiple anchor connection pieces are spaced apart along the circumference of the anti-skid chain body; each anchor connection piece is fixedly connected to the anti-skid chain body, and the anchor connection piece includes a first end and a second end that are oppositely arranged, the first end being an end of the anchor connection piece for mounting close to the inner side of the tire, and the first end is for mounting on the tire crown; The tightening cord is made of a textile material and / or a rubber material, and includes a first tightening cord and a second tightening cord, wherein the first tightening cord is connected to each of the first ends respectively, and the second tightening cord is connected to each of the second ends respectively.

2. The tire anti-skid chain according to claim 1, wherein: The tightening rope is an elastic rope with a telescopic function.

3. The tire anti-skid chain according to claim 1, wherein: Each of the anchor point connecting plates includes a first plate and a second plate that are connected to each other, wherein the end of the first plate away from the second plate is the first end, one end of the second plate is connected to the first plate, and the other end of the second plate is the second end; the first plate is used to contact the crown, and the second plate is used to contact the outer side of the tire.

4. The tire anti-skid chain according to claim 3, wherein: The length of the first plate is smaller than the thickness of the tire.

5. The tire anti-skid chain according to claim 1, wherein: A first connecting hole is formed on the first plate near the first end, a first connecting portion is provided on the outer side of the first connecting hole, and an outer surface of the first connecting portion is lower than an outer surface of the first plate; A second connecting hole is formed on the second plate body near the second end, and a second connecting portion is formed on the outer side of the second connecting hole.

6. The tire anti-skid chain according to claim 5, characterized in that: It also includes a pull belt, and the ends of the pull belt are respectively installed in the second connecting holes.

7. The tire anti-skid chain according to claim 6, wherein: The force pulling belt is made of textile material and includes multiple strips. One end of each of the strips is fixedly connected at a connection point, and the other end of each of the strips is respectively connected to the corresponding second connection hole.

8. The tire anti-skid chain according to claim 7, wherein: The connection length of the pull belt is adjustable to change the distance between the connection point and the corresponding second connection part.

9. The tire anti-skid chain according to claim 1, wherein: The anti-skid chain body includes a first chain and a second chain arranged at intervals, and the ring formed by the first chain and the second chain is of the same size; the anti-skid chain body also includes a support bar, and a plurality of the support bars are arranged at intervals along the circumference of the anti-skid chain body, one end of the support bar is connected to the first chain, and the other end of the support bar is connected to the second chain, so that the first chain and the second chain are kept at an interval.

10. The tire anti-skid chain according to claim 9, wherein: The tensioner includes a first body portion and a second body portion, the first body portion is used to be fixed on the first chain, and the second body portion is used to be fixed on the second chain; the tensioner is configured as follows: the first body portion and the second body portion are detachably connected to change the diameter of the ring formed by the anti-skid chain body.

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