Anti-skid nail and tire

Abstract

The utility model discloses an anti-skid nail and a tire, and belongs to the technical field of tires, the anti-skid nail comprises a shell component and a wear-resistant core, the wear-resistant core comprises a core body, a limiting part is arranged at the inner end of the core body, the limiting part at least partially protrudes out of the core body in the length direction perpendicular to the core body, and a limiting face is formed at the outer end of the limiting part. The shell assembly comprises an outer shell and an inner sleeve, and a limiting counter bore is formed in the outer end face of the outer shell. The limiting part is located in the limiting counter bore, and the outer end of the core body extends out of the limiting counter bore; the inner sleeve is located in the limiting counter bore, and the wear-resisting core is fixed in the limiting counter bore. The anti-skid nails are embedded in the peripheral surface of the tire; the limiting part is arranged between the core body and the inner sleeve, so that the stable connection of the wear-resistant core and the shell assembly is ensured, the wear-resistant core is prevented from falling off, the durability of the anti-skid nail and the stability of the anti-skid function of the tire are improved, and the use safety of the tire is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to an anti-skid spike and a tire. Background Art

[0002] With the continuous development of the tire industry, anti-skid studs, as an indispensable device for preventing tires from slipping, are embedded in automobile tires to increase tire grip on wet or icy roads, improve vehicle traction and stability, reduce skidding in emergency situations, and thus enhance driving safety. However, the quality of existing anti-skid studs varies greatly. Most existing tire anti-skid studs experience wobbling in their wear-resistant cores, a crucial component, due to driving habits and vehicle types. Over time, these cores can become loose and fall out.

[0003] The anti-skid studs currently available on the market are composed of a wear-resistant core and a shell. The structure is that the wear-resistant core is pressed into the shell, and the shell is fixedly connected to the tire. As the tire travels longer, a gap will appear between the wear-resistant core and the shell, eventually causing the wear-resistant core to fall out, thereby causing the anti-skid function of the anti-skid studs to be lost.

[0004] Therefore, it is necessary to redesign the structure of the anti-skid spikes so that the wear-resistant cores maintain good bonding with the shell to avoid losses caused by the wear-resistant cores of the anti-skid spikes falling off. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides an anti-skid spike and a tire, which can effectively prevent the vehicle from slipping due to the fall of the wear-resistant core during the movement of the anti-skid spike on the tire.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] In one aspect, the present invention provides an anti-slip spike comprising a shell assembly and a wear-resistant core;

[0008] The wear-resistant core includes a core body, an inner end of the core body is provided with a limiting portion, and in a direction perpendicular to the length of the core body, the limiting portion at least partially protrudes outward from the core body, forming a limiting surface at the outer end of the limiting portion;

[0009] The shell assembly includes an outer shell and an inner sleeve, and a limiting countersunk hole is provided on the outer end surface of the outer shell; the limiting portion is located in the limiting countersunk hole, and the outer end of the core body extends out of the limiting countersunk hole; the inner sleeve is located in the limiting countersunk hole, fixing the wear-resistant core in the limiting countersunk hole.

[0010] In the above-mentioned anti-slip stud, the core and the limiting portion are an integrated structure or a separate structure;

[0011] And / or, the side wall thickness of the limiting countersunk hole is 0.85-0.9 mm;

[0012] And / or, the cross section of the limiting portion is any one of a circle, a cross, a tooth, a petal, a triangle, and a hexagon;

[0013] And / or, the core is a cylinder or a cone;

[0014] And / or, further comprising a gasket, wherein the gasket is arranged between the wear-resistant core and the inner sleeve or between the wear-resistant core and the limiting countersunk hole;

[0015] And / or, the shell includes a core connection part and a tire connection part, and the limiting countersunk hole is located on the outer end face of the core connection part; the core connection part and the tire connection part are connected by a connecting neck, and the outer diameter of the connecting neck is smaller than the outer diameter of the core connection part and the outer diameter of the tire connection part.

[0016] In the above-mentioned anti-slip nail, a plurality of locking recesses are provided on the hole wall of the limiting countersunk hole, and a plurality of locking protrusions are provided on the outer wall of the inner sleeve. The locking protrusions correspond to and are engaged with the locking recesses one by one.

[0017] In the above-mentioned anti-slip stud, the locking recess is an annular groove, and the locking protrusion is an annular boss;

[0018] And / or, a plurality of the locking protrusions are spaced apart in the axial direction of the inner sleeve, and a plurality of the locking recesses are spaced apart in the axial direction of the limiting counterbore;

[0019] And / or, three locking protrusions are provided on the outer wall of the inner sleeve, and three locking recesses are provided on the wall of the limiting counterbore;

[0020] And / or, the cross-sections of the locking protrusion and the locking recess are both semicircular, and the inner diameter of the locking recess is 0.27-0.3 mm.

[0021] In the above-mentioned anti-slip stud, a limiting groove is provided on the inner end surface of the inner sleeve, a through hole is provided on the outer end surface of the inner sleeve, and the limiting groove is communicated with the through hole;

[0022] The limiting portion is located in the limiting groove, and the core passes through the through hole and extends out of the inner sleeve.

[0023] In the above-mentioned anti-slip stud, the outer end surface of the limiting portion is in contact with the bottom of the limiting groove through a flat surface, an arc surface or a conical surface;

[0024] And / or, the butting surface between the wear-resistant core and the limiting countersunk hole is a plane;

[0025] And / or, the hardness of the inner sleeve is higher than the hardness of the outer sleeve.

[0026] In the above-mentioned anti-slip stud, the limiting groove and the limiting portion are in clearance fit;

[0027] And / or, the outer diameter of the limiting portion is 3.45-3.5 mm, and the inner diameter of the limiting groove is 3.5-3.53 mm.

[0028] In the above-mentioned anti-slip stud, the limiting portion and the limiting groove are relatively fixed in the circumferential direction, so that the limiting portion cannot rotate relative to the limiting groove;

[0029] And / or, the cross section of the limiting portion is any one of a cross shape, a tooth shape, a petal shape, a triangle, and a hexagon; and the limiting groove matches the limiting portion.

[0030] In the above-mentioned anti-slip stud, the limiting portion is fixedly arranged on the inner end surface of the core body; or, the limiting portion is arranged at the inner end portion of the core body, and the inner end surface of the limiting portion is spaced apart from the inner end surface of the core body.

[0031] On the other hand, the present invention provides a tire, the outer peripheral surface of which is inlaid with the above-mentioned anti-slip studs.

[0032] The beneficial effects of the present invention are as follows:

[0033] The housing assembly of the anti-slip spike adopts a double-shell design with an outer shell and an inner sleeve. The wear-resistant core and the housing assembly adopt a new structural form, which facilitates the assembly of the wear-resistant core and prevents the housing from being worn and deformed. A limiter is set between the core and the inner sleeve to ensure a stable connection between the wear-resistant core and the housing assembly, prevent the wear-resistant core from falling off, and improve the durability and stability of the anti-slip spike.

[0034] The inner sleeve accurately limits the wear-resistant core and has a solid structure. The protruding dimensions of the wear-resistant core are consistent, and the force is distributed across the tire, avoiding the hidden dangers caused by inconsistent wear of the anti-skid studs. It also prevents the wear-resistant core from falling off due to deformation of the shell when the anti-skid studs are in contact with the ground for a long time.

[0035] The anti-slip spikes have a simple overall structure, low production cost, and are easy to promote and apply.

[0036] The tire adopts the anti-skid spikes of the present application, which can improve the stability of the anti-skid function and greatly enhance the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of the outer shell of the anti-slip stud of the present invention;

[0038] Figure 2 for Figure 1Enlarged view of area A in the middle;

[0039] Figure 3 This is a schematic diagram of the assembly structure of the inner sleeve and the wear-resistant core of the anti-slip stud of the utility model;

[0040] Figure 4 This is a schematic structural diagram of the wear-resistant core in the anti-slip stud of the present invention;

[0041] Figure 5 This is a schematic structural diagram of the inner sleeve of the anti-slip stud of the present invention;

[0042] Figure 6 for Figure 5 Enlarged view of area B in the middle;

[0043] Figure 7 This is a schematic structural diagram of a first embodiment of the anti-slip studs of the present invention;

[0044] Figure 8 This is a structural diagram of a second embodiment of the anti-slip studs of the present invention;

[0045] Figure 9 This is a schematic structural diagram of a third embodiment of the anti-slip stud of the present invention;

[0046] Figure 10 This is a schematic structural diagram of the wear-resistant core in the fourth embodiment of the anti-slip stud of the present invention;

[0047] Figure 11 for Figure 10 A top view of

[0048] Figure 12 This is a schematic structural diagram of a fifth embodiment of the anti-slip studs of the present invention;

[0049] Figure 13 This is a schematic structural diagram of a sixth embodiment of the anti-slip stud of the present invention;

[0050] Figure 14 This is a schematic structural diagram of the wear-resistant core of the sixth embodiment of the anti-slip stud of the present invention;

[0051] Figure 15 for Figure 14 A top view of

[0052] Figure 16 This is a structural schematic diagram of a seventh embodiment of the anti-slip stud of the present utility model;

[0053] Figure 17 This is a schematic structural diagram of the wear-resistant core of the seventh embodiment of the anti-slip stud of the present invention;

[0054] Figure 18 for Figure 17 A top view of

[0055] Figure 19 This is a schematic structural diagram of an eighth embodiment of the anti-slip studs of the present invention.

[0056] In the picture:

[0057] 10-housing; 11-limiting countersunk hole; 12-locking recess; 13-core connecting portion; 14-connecting neck; 15-tire connecting portion;

[0058] 20-wear-resistant core; 21-limiting portion; 22-core; 23-anti-slip surface;

[0059] 30-inner sleeve; 31-locking protrusion; 32-limiting groove; 33-through hole;

[0060] 40-first gasket;

[0061] 50-Second gasket. DETAILED DESCRIPTION

[0062] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0063] In the following, for the convenience of explaining the structure of the anti-skid spike, based on the usage state of the anti-skid spike, it is assumed that the end of the anti-skid spike extending into the interior of the tire is the inner end, and the other end is the outer end.

[0064] First, please refer to Figure 1-Figure 7 , is an embodiment of an anti-slip stud provided by the utility model, comprising a shell assembly and a wear-resistant core 20, wherein the wear-resistant core 20 is installed in the shell assembly. In order to prevent the wear-resistant core 20 from falling off, the shell assembly is composed of an outer shell 10 and an inner sleeve 30, and a limiting countersunk hole 11 is provided on the outer end surface of the outer shell 10. The wear-resistant core 20 comprises a core body 22 and a limiting portion 21, wherein the limiting portion 21 is located in the limiting countersunk hole 11, the inner end of the core body 22 extends into the limiting countersunk hole 11 and is connected to the limiting portion 21, and the outer end of the core body 22 extends out of the limiting countersunk hole 11. In the length direction perpendicular to the core body 22, the limiting portion 21 at least partially protrudes outward from the core body 22, and a limiting surface is formed at the outer end of the limiting portion 21; if the core body 22 is a cylinder, the limiting portion 21 partially protrudes outward from the core body 22 in the radial direction. The inner sleeve 30 is located in the limiting counterbore 11 and outside the limiting portion 21. Together with the outer shell 10, it forms a barrier and a limit at the limiting surface and inner end surface of the wear-resistant core 20, thereby fixing the wear-resistant core 20 in the limiting counterbore 11. The outer end surface of the core body 22 is the anti-slip surface 23; preferably, the anti-slip surface 23 is a curved surface.

[0065] The wear-resistant core 20, inner sleeve 30, and outer sleeve 10 together form an anti-slip stud. Traditional anti-slip studs allow the wear-resistant core 20 to be pressed into the shell for ease of assembly. Therefore, the shell cannot be made of a material with excessive hardness. During use, the joints between the shell and the wear-resistant core 20 are constantly squeezed and wear-prone, ultimately causing the wear-resistant core 20 to easily fall off. This solution utilizes a new product structure combination in which the inner sleeve 30 and outer sleeve 10 cooperate to install and position the wear-resistant core 20. This effectively alleviates the problem of the wear-resistant core 20 falling off after prolonged use of the anti-slip stud, stabilizes the bond strength and overall firmness between the shell assembly and the wear-resistant core 20. Since the shell assembly does not need to be rigidly assembled with the wear-resistant core 20, the inner sleeve 30 can be made of a harder material, thus avoiding the wear problems associated with traditional anti-slip studs. The dual-shell structure of the shell assembly prevents wear and deformation during use. The extrusion wear between the wear-resistant core 20 and the shell assembly is broken down into extrusion wear between the wear-resistant core 20 and the inner sleeve 30, and extrusion wear between the inner sleeve 30 and the outer shell 10. The extrusion wear between the wear-resistant core 20 and the inner sleeve 30 is evenly distributed along the limiting surfaces of the wear-resistant core 20 and the inner sleeve 30, further reducing extrusion wear, preventing the wear-resistant core 20 from falling off, and increasing service life. To reduce the impact of wear on the performance of the anti-slip stud, the hardness of the inner sleeve 30 is higher than that of the outer shell 10. For example, the inner sleeve 30 and the outer shell 10 can be made of materials with different hardnesses, or the inner sleeve 30 and the outer shell 10 can be made of the same metal but undergo different heat treatment processes to achieve different hardnesses. For example, the outer shell 10 can be made of 10 steel, the wear-resistant core 20 can be made of YG8 alloy, and the inner sleeve 30 can be made of YG8 or YG6 alloy.

[0066] After the inner sleeve 30 is inserted into the limiting countersunk hole 11, the outer end surfaces of the two are flush. The inner end surface of the inner sleeve 30 contacts and fits the bottom wall of the limiting countersunk hole 11, maximizing the connection surface between the inner sleeve 30 and the outer shell 10 and improving the stability of the connection. The sidewall thickness of the limiting countersunk hole 11 is preferably 0.85-0.9mm, ensuring strength while also ensuring good assembly performance.

[0067] The inner sleeve 30 and the limiting counterbore 11 can be fixedly connected by means of a snap connection, interference fit, or detachably connected by means of a threaded connection. As a snap connection solution between the inner sleeve 30 and the limiting counterbore 11, a plurality of locking recesses 12 are provided on the wall of the limiting counterbore 11; correspondingly, a plurality of locking protrusions 31 are provided on the outer wall of the inner sleeve 30. The locking protrusions 31 correspond to and snap into the locking recesses 12 one by one, and the locking protrusions 31 are embedded in the locking recesses 12, thereby locking the inner sleeve 30 to the outer shell 10.

[0068] The locking recess 12 is preferably an annular groove, that is, the locking recess 12 extends in the circumferential direction of the limiting counterbore 11; the locking protrusion 31 is an annular boss.

[0069] The number of locking recesses 12 and locking protrusions 31 can be selected based on actual needs. When there are more than one locking recess 12 and locking protrusion 31, the locking recesses 12 are spaced apart in the axial direction of the position-limiting counterbore 11. For example, three locking protrusions 31 are provided on the outer wall of the inner sleeve 30, spaced apart in the axial direction of the inner sleeve 30; and three locking recesses 12 are provided on the wall of the position-limiting counterbore 11, corresponding to the three locking protrusions 31, and also spaced apart in the axial direction of the position-limiting counterbore 11.

[0070] Please refer to Figure 2 and Figure 6 The cross-sections of the locking protrusion 31 and the locking recess 12 are preferably semicircular, and the inner diameter of the locking recess 12 is preferably R0.27-R0.3mm.

[0071] like Figure 5 As shown, the inner end surface of the inner sleeve 30 is provided with a retaining groove 32, and the outer end surface of the inner sleeve 30 is provided with a through hole 33, with the retaining groove 32 communicating with the through hole 33. The retaining portion 21 of the wear-resistant core 20 is located within the retaining groove 32, while the core 22 extends through the through hole 33 and its outer end protrudes outward from the inner sleeve 30. The retaining portion 21 cooperates with the retaining groove 32 to ensure a consistent dimensional appearance of the wear-resistant core 20 protruding from the tire, thus avoiding safety hazards caused by inconsistent wear of the anti-skid studs. The bottom wall of the retaining groove 32 abuts the retaining surface of the wear-resistant core 20, effectively limiting the axial position of the wear-resistant core 20 and ensuring a secure structure. Furthermore, the relatively hard inner sleeve 30 directly contacts the wear-resistant core 20, preventing the wear-resistant core 20 from falling out due to deformation of the outer shell 10 after prolonged contact with the anti-skid studs.

[0072] The cross-sectional shape of the limiting groove 32 and the cross-sectional shape of the through hole 33 can be set according to the structure of the wear-resistant core 20; for example, the core 22 is cylindrical, the limiting portion 21 is a truncated cone, the core 22 and the limiting portion 21 are coaxially arranged, and the outer diameter of the limiting portion 21 is larger than the outer diameter of the core 22; accordingly, the limiting groove 32 is a circular groove, the through hole 33 is a circular aperture, and the limiting groove 32 and the through hole 33 are coaxially arranged. The outer diameter of the limiting portion 21 is preferably 3.45-3.5mm, and the diameter of the limiting groove 32 is preferably 3.5-3.53mm. The limiting groove 32 and the limiting portion 21 achieve a clearance fit, ensuring that the fit can stabilize the bonding force between the wear-resistant core 20 and the inner sleeve 30, thereby stabilizing the wear-resistant core 20.

[0073] Alternatively, the cross section of the core 22 is polygonal, and the through hole 33 is a polygonal hole. Alternatively, the cross section of the limiting portion 21 is cross-shaped, tooth-shaped, petal-shaped, triangular, hexagonal, etc. The cross section of the limiting groove 32 can be the same as the cross section of the limiting portion 21, or it can be a circular groove, as long as it can accommodate the limiting portion 21. The longitudinal section of the limiting portion 21 can be Figure 7 The rectangle shown, Figure 9The polygon shown, Figure 13 The trapezoid shown, Figure 16 The oblong shape shown, etc.

[0074] The core 22 and the limiting portion 21 can be a separate structure, that is, the core 22 and the limiting portion 21 are processed separately and then assembled and connected into one piece; for example, the inner end of the core 22 has an external thread, the limiting portion 21 has a screw hole, and the core 22 and the limiting portion 21 are screwed together. Preferably, the core 22 and the limiting portion 21 are an integrated structure, which has good structural stability, high strength, and simple processing technology.

[0075] In the axial direction of the core body 22, the limiting portion 21 is located on the inner side of the core body 22 and is fixedly connected, or, the limiting portion 21 is located at the inner end portion of the core body 22 and is fixedly connected to the outer circumferential surface of the core body 22, and the inner end surface of the limiting portion 21 is spaced apart from the inner end surface of the core body 22.

[0076] In order to improve the applicability of the inner sleeve 30 , the outer sleeve 10 and the wear-resistant core 20 , the anti-slip stud further includes a gasket, which is arranged between the wear-resistant core 20 and the bottom of the limiting groove 32 or between the wear-resistant core 20 and the bottom wall of the limiting counterbore 11 .

[0077] As a first embodiment of the anti-slip studs, please refer to Figure 7 The core 22 is cylindrical, and the limiting portion 21 is a frustum. The limiting portion 21 and the core 22 are coaxial and integral. The outer diameter of the limiting portion 21 is the same as the inner diameter of the limiting groove 32, and the axial lengths of the limiting portion 21 are also the same. Therefore, the bottom wall of the limiting groove 32 is aligned with the outer end surface of the limiting portion 21, and the bottom wall of the limiting counterbore 11 is aligned with the inner end surface of the limiting portion 21.

[0078] When the anti-slip spike is assembled, the wear-resistant core 20 extends from the limiting groove 32 into the inner sleeve 30 , and then the wear-resistant core 20 and the inner sleeve 30 are integrally installed into the outer shell 10 .

[0079] As a second embodiment of the wear-resistant core 20, please refer to Figure 8 , which is different from the first embodiment, the axial length of the limiting portion 21 is smaller than the axial length of the limiting groove 32, and a first gasket 40 is provided between the limiting portion 21 and the bottom wall of the limiting counterbore 11; that is, the inner sleeve 30 limits the axial outer side of the wear-resistant core 20, and the first gasket 40 cooperates with the bottom wall of the limiting counterbore 11 to limit the axial inner side of the wear-resistant core 20.

[0080] As a third embodiment of the wear-resistant core 20, please refer to Figure 9 Unlike the first embodiment, the limiting portion 21 includes a cylindrical section and a conical section, the conical section is located outside the cylindrical section and the large end of the conical section is connected to the cylindrical section. The inner cavity of the limiting groove 32 is adapted to the outer contour of the limiting portion 21.

[0081] In this embodiment, since the limiting surface is a conical surface, the inner sleeve 30 and the limiting portion 21 are in contact with each other via the conical surface, which has a certain limiting effect on the axial and radial directions of the wear-resistant core 20 .

[0082] As a fourth embodiment of the wear-resistant core 20, please refer to Figure 10 and Figure 11 Unlike the first embodiment, the stopper 21 has four portions protruding from the core 22, forming a cross-shaped structure. This structure, consisting of four small surfaces, facilitates control of machining accuracy and reduces material usage and production costs for the wear-resistant core 20. When the stopper groove 32 is also cross-shaped, it prevents the wear-resistant core 20 from rotating relative to the inner sleeve 30 and outer sleeve 10.

[0083] As a fifth embodiment of the wear-resistant core 20, please refer to Figure 12 , different from the first embodiment, the limiting portion 21 is annular and is sleeved on the outside of the core body 22, and the inner end surface of the limiting portion 21 is spaced apart from the inner end surface of the core body 22; the inner end surface of the core body 22 is fitted with the bottom wall of the limiting counterbore 11 to achieve axial inner limitation of the wear-resistant core 20; the outer end surface of the limiting portion 22 is fitted with the bottom wall of the limiting groove 32 to achieve axial outer limitation of the wear-resistant core 20.

[0084] In this embodiment, the effective connection surface between the outer sleeve 30 and the housing 10 is ensured, and the connection stability is good; at the same time, the axial length of the limiting portion 21 is reduced while ensuring the limiting function of the limiting portion 21.

[0085] As a sixth embodiment of the wear-resistant core 20, please refer to Figure 13 、 14 15. Unlike the first embodiment, the limiting portion 21 is a frustum, with the inner end of the limiting portion 21 being the smaller end and the outer end being the larger end. The outer end of the limiting portion 21 forms an annular limiting surface, which has a large mating surface with the bottom wall of the limiting groove 32 to ensure effective positioning. The inner end of the limiting portion 21 is a circular limiting surface, which also achieves good positioning and limiting effects.

[0086] As the seventh embodiment of the wear-resistant core 20, please refer to Figure 16 、 17 18. Unlike the first embodiment, the portion of the limiting portion 21 protruding from the core 22 has an arcuate longitudinal cross-section, forming a curved limiting surface. The bottom wall of the limiting groove 32 is also arcuate, and the limiting portion 21 and the core 22 meet at this arcuate surface, achieving a good limiting effect. The inner end of the limiting portion 21 is flat, and the interface with the bottom wall of the limiting counterbore 11 is also flat.

[0087] As the eighth embodiment of the wear-resistant core 20, please refer to Figure 19The core 22 is conical, with a flat inner end, a curved outer end, and a conical outer circumferential surface. The outer end of the core 22 is large, providing a larger anti-slip surface 23. The inner end is externally threaded, and the retaining portion 21 is provided with a threaded hole, with the core 22 and retaining portion 21 being threadedly connected. The through hole 33 is a tapered hole, and the retaining groove 32 is circular. The retaining portion 21 is a frustum, with its inner end surface abutting against the bottom wall of the retaining counterbore 11. A second gasket 50 is provided between the outer end surface and the bottom wall of the retaining groove 32.

[0088] When assembling the anti-slip studs, the second gasket 50 and the limiting portion 21 can be overlapped and placed into the limiting groove 32 of the inner sleeve 30, and then the inner sleeve 30 and the outer sleeve 10 are assembled. Finally, the core 22 is extended from the through hole 33 into the limiting groove 32 and screwed into the limiting portion 21.

[0089] On the other hand, the utility model provides a tire, the outer peripheral surface of the tire is inlaid with the above-mentioned anti-slip studs.

[0090] like Figure 2 As shown, the shell 10 includes a core connection part 13 and a tire connection part 15, and the limiting countersunk hole 11 is located in the core connection part 13; the core connection part 13 and the tire connection part 15 are connected by a connecting neck 14, and the outer diameter of the connecting neck 14 is smaller than the outer diameter of the core connection part 13 and the outer diameter of the tire connection part 15, forming a structure that is thin in the middle and thick at both ends, so that the shell 10 can be firmly embedded in the tire.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An anti-slip spike, characterized in that: including a housing assembly and a wear-resistant core (20); The wear-resistant core (20) comprises a core body (22), wherein a limiting portion (21) is provided at an inner end of the core body (22), and in a length direction perpendicular to the core body (22), the limiting portion (21) at least partially protrudes outward from the core body (22); The shell assembly comprises an outer shell (10) and an inner sleeve (30), wherein a limiting countersunk hole (11) is provided on the outer end surface of the outer shell (10); the limiting portion (21) is located in the limiting countersunk hole (11), and the outer end of the core body (22) extends out of the limiting countersunk hole (11); the inner sleeve (30) is located in the limiting countersunk hole (11), and fixes the wear-resistant core (20) in the limiting countersunk hole (11).

2. The anti-slip stud according to claim 1, characterized in that: The core (22) and the limiting portion (21) are an integrated structure or a split structure; And / or, the side wall thickness of the limiting countersunk hole (11) is 0.85-0.9 mm; And / or, the cross section of the limiting portion (21) is any one of a circle, a cross, a triangle, and a hexagon; And / or, the core (22) is a cylinder or a cone; And / or, further comprising a gasket, wherein the gasket is arranged between the wear-resistant core (20) and the inner sleeve (30) or between the wear-resistant core (20) and the limiting countersunk hole (11); And / or, the housing (10) comprises a core connection portion (13) and a tire connection portion (15), the limiting countersunk hole (11) is located on the outer end face of the core connection portion (13); the core connection portion (13) and the tire connection portion (15) are connected via a connecting neck (14), and the outer diameter of the connecting neck (14) is smaller than the outer diameter of the core connection portion (13) and the outer diameter of the tire connection portion (15).

3. The anti-slip stud according to claim 1, characterized in that: A plurality of locking recesses (12) are provided on the hole wall of the limiting countersunk hole (11), and a plurality of locking protrusions (31) are provided on the outer wall of the inner sleeve (30). The locking protrusions (31) correspond to and are locked with the locking recesses (12) in a one-to-one manner.

4. The anti-slip stud according to claim 3, characterized in that: The locking recess (12) is an annular groove, and the locking protrusion (31) is an annular boss; And / or, a plurality of the locking protrusions (31) are spaced apart in the axial direction of the inner sleeve (30), and a plurality of the locking recesses (12) are spaced apart in the axial direction of the limiting countersunk hole (11); And / or, three locking protrusions (31) are provided on the outer wall of the inner sleeve (30), and three locking recesses (12) are provided on the hole wall of the limiting countersunk hole (11); And / or, the cross-sections of the locking protrusion (31) and the locking recess (12) are both semicircular, and the inner diameter of the locking recess (12) is 0.27-0.3 mm.

5. The anti-slip stud according to claim 1, characterized in that: A limiting groove (32) is provided on the inner end surface of the inner sleeve (30), a through hole (33) is provided on the outer end surface of the inner sleeve (30), and the limiting groove (32) is communicated with the through hole (33); The limiting portion (21) is located in the limiting groove (32), and the core (22) passes through the through hole (33) and extends out of the inner sleeve (30).

6. The anti-slip stud according to claim 5, characterized in that: The outer end surface of the limiting portion (21) is in contact with the bottom of the limiting groove (32) via a plane, an arc surface or a conical surface; And / or, the butting surface between the wear-resistant core (20) and the limiting countersunk hole (11) is a plane; And / or, the hardness of the inner sleeve (30) is higher than the hardness of the outer sleeve (10).

7. The anti-slip stud according to claim 5, characterized in that: The limiting groove (32) is clearance-matched with the limiting portion (21); And / or, the outer diameter of the limiting portion (21) is 3.45-3.5 mm, and the inner diameter of the limiting groove (32) is 3.5-3.53 mm.

8. The anti-slip stud according to claim 5, characterized in that: The limiting portion (21) and the limiting groove (32) are relatively fixed in the circumferential direction, so that the limiting portion (21) cannot rotate relative to the limiting groove (32); And / or, the cross section of the limiting portion (21) is any one of a cross, a triangle, and a hexagon; and the limiting groove (32) matches the limiting portion (21).

9. The anti-slip stud according to claim 1, characterized in that: The limiting portion (21) is fixedly arranged on the inner end surface of the core body (22); or, the limiting portion (21) is arranged at the inner end portion of the core body (22), and the inner end surface of the limiting portion (21) is spaced apart from the inner end surface of the core body (22).

10. A tire, characterized in that: The outer peripheral surface of the tire is inlaid with the anti-slip studs according to any one of claims 1 to 9.

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