Simple-to-assemble inner support body and safety tire assembly

Abstract

The utility model discloses an inner support body easy to assemble, the inner support body is formed by circumferentially splicing at least two support pieces through a mounting structure, the mounting structure comprises a convex joint and a concave joint which are arranged at the two ends of each support piece, and a fixing bolt used for fixing the adjacent support pieces is arranged between each convex joint and the corresponding concave joint. The convex connector and the concave connector are provided with anti-loosening structures used for preventing the fixing bolts from loosening, during splicing, the convex connector of one supporting piece can be matched with the concave connector of the adjacent supporting piece, and meanwhile the utility model further discloses a safety tire assembly. The assembling difficulty is reduced, the assembling efficiency is improved, meanwhile, the anti-loosening structures are arranged on the fixing bolts used for connecting the two adjacent supporting pieces, the phenomena of loosening, collapsing and the like of the inner supporting body caused by bolt loosening under long-term and high-frequency vibration of the inner supporting body can be effectively prevented, the inner supporting body has extremely high safety guarantee capacity, and the service life of the inner supporting body is prolonged. And meanwhile, the conditions of abnormal sound, dynamic unbalance and the like are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety tires, and particularly relates to an inner support body with simple assembly and a safety tire assembly. Background Art

[0002] To ensure the safety of the tire after deflation, a support component for supporting the tire is provided between the tire and the rim. At present, there are many structures of the support component, including complex support devices, such as the automobile tire explosion-proof support device disclosed in Chinese Patent CN103332072A, and simple structures, such as the tire inner support body disclosed in Chinese Patent CN108215673A. Among them, the inner support body is usually an annular structure installed on the rim, and most of it is composed of multiple pieces spliced together. At the same time, to ensure the deflation support of the tire, the inner support body is often made of materials such as nylon, polyurethane, aluminum alloy, and rubber. The inner support body is connected into a ring shape through connecting bolts, and there are problems of low assembly efficiency due to difficult assembly during installation. At the same time, the connecting bolts used for connecting the inner support body are prone to loosening under long-term and high-frequency vibrations, resulting in loosening and collapse of the spliced support ring, thereby affecting the support effect of the support ring. At the same time, there are also problems such as abnormal noise and dynamic imbalance. Summary of the Utility Model

[0003] The utility model intends to propose an inner support body with simple assembly, which not only has simple installation and improves the installation efficiency, but also can effectively prevent the bolts of the inner support body from loosening under long-term and high-frequency vibrations, resulting in phenomena such as loosening and collapse of the inner support body, so that the inner support body has extremely high safety guarantee ability, and at the same time avoids the occurrence of abnormal noise, dynamic imbalance and other situations.

[0004] Therefore, the technical solution adopted by the utility model is as follows: an inner support body with simple assembly, the inner support body is formed by circumferentially splicing at least two support members through an installation structure, the installation structure is provided with a convex joint and a concave joint at both ends of the support member, a fixing bolt for fixing adjacent support members is arranged between the convex joint and the concave joint, and an anti-loosening structure for preventing the fixing bolt from loosening is arranged on the convex joint and the concave joint. When splicing, the convex joint of one support member can cooperate with the concave joint of the adjacent support member.

[0005] As a preference in the above solution, a positioning protrusion for facilitating the splicing of the convex joint and the concave joint is arranged at the end of the convex joint, and a positioning groove matching the positioning protrusion is arranged on the inner circle of the concave joint.

[0006] Further preferably, there is no gap between the radial joint surfaces when the convex joint and the concave joint are spliced, and a gap of 0.5 - 2.5 mm is left between the circumferential joint surfaces when the convex joint and the concave joint are spliced.

[0007] Further preferably, the anti-loosening structure includes a reinforcing block embedded in the concave joint. A threaded hole matching the fixing bolt is provided in the concave joint, and the threaded hole passes through the reinforcing block. A bolt counterbore for the fixing bolt to pass through is provided on the convex joint.

[0008] Further preferably, the anti-loosening structure further includes a retaining block that can be arranged in the bolt counterbore to prevent the fixing bolt from withdrawing. One end of the retaining block is set to be conical or spherical. After the retaining block is installed, the conical section or spherical section is located on the radially inner side, and the radially inner side surface of the retaining block after installation protrudes between 1.5 - 2.5 mm from the inner ring arc surface of the support member.

[0009] Meanwhile, a safety tire assembly is also disclosed, which includes a tire, a rim, and the above-mentioned inner support body. The inner support body is sleeved on the mounting surface of the rim and is located inside the tire. A gap of 0.2 - 1.5 mm is left between the inner ring surface of the inner support body after installation and the mounting surface of the rim.

[0010] The beneficial effects of the present utility model: By installing the fixing bolt in a radial installation manner, not only is the installation simple, but also the installation efficiency is improved. At the same time, an anti-loosening structure is provided on the fixing bolt used to connect two adjacent support members, which can effectively prevent the phenomenon of the inner support body becoming loose or collapsing due to bolt loosening caused by long-term and high-frequency vibration of the inner support body, making the inner support body have extremely high safety guarantee ability, and at the same time avoiding the occurrence of abnormal noises, dynamic imbalance and other situations. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the support member in the present utility model.

[0012] Figure 2 It is a schematic diagram of the anti-loosening structure in the present utility model.

[0013] Figure 3 It is a schematic diagram of the safety tire assembly in the present utility model.

[0014] Figure 4 It is a schematic diagram of the convex joint in the present utility model.

[0015] Figure 5 It is a schematic diagram of the concave joint in the present utility model.

[0016] Reference numerals: tire - 100, inner surface of tire - 110, rim - 200, mounting surface - 210, support member - 300, inner ring arc surface - 310, groove - 311, bottom surface - 311a, side surface - 311b, convex joint - 320, bolt counterbore - 321, positioning protrusion - 322, first joint surface - 323, first mating surface - 324, third mating surface - 325, concave joint - 330, threaded hole - 331, second joint surface - 332, second mating surface - 333, fourth mating surface - 334, outer ring arc surface - 340, reinforcing block - 350, support outer ring - 370, mesh hole - 371, mounting inner ring - 380, fixing bolt - 400, anti-loosening block - 500, tapered section - 510. Detailed implementation manners

[0017] The present utility model will be further described below by way of embodiments in conjunction with the accompanying drawings:

[0018] As Figures 1-5 shown, a simple-to-assemble inner support body is composed of at least two support members 300 circumferentially spliced through a connection structure. The connection structure includes a convex joint 320 and a concave joint 330 provided at both ends of the support member 300. When splicing, the convex joint 320 of one support member can cooperate with the concave joint 330 of the adjacent support member.

[0019] To realize the connection between the convex joint 320 and the concave joint 330, a fixing bolt 400 for fixing adjacent support members 300 is provided between the convex joint 320 and the concave joint 330, that is, the convex joint and the concave joint are locked by a radially arranged fixing bolt, so as to realize the connection between the two support members. At the same time, an anti-loosening structure for preventing the fixing bolt 400 from loosening is provided on the convex joint 320 and the concave joint 330.

[0020] The anti-loosening structure includes a reinforcing block 350 embedded in the concave joint 330. A threaded hole 331 matching the fixing bolt 400 is provided in the concave joint 330, and the threaded hole 331 passes through the reinforcing block 350. At the same time, a bolt counterbore 321 for the fixing bolt 400 to pass through and corresponding to the position of the threaded hole 331 is provided on the convex joint 320. The bolt counterbore includes a through hole for the upper screw of the fixing bolt to pass through and a counterbore for accommodating the bolt head. Preferably, the reinforcing block is set as a metal block, so that the threaded hole on the concave joint has high strength and anti-fatigue characteristics, enabling it to meet the requirements of repeated use, and at the same time, the inner threaded hole will not fail during long-term use after assembly.

[0021] To further prevent the fixing bolts from loosening, the anti-loosening structure further includes a retaining block 500 that can be disposed in the bolt counterbore 321 to prevent the fixing bolt 400 from withdrawing. The retaining block is made of a flexible material and is bonded in the bolt counterbore after the fixing bolt is installed during installation. Preferably, one end of the retaining block 500 is set to be spherical or conical, and the end of the conical section is the small end. After the retaining block 500 is installed, the conical section 510 or the spherical section is located on the radially inner side, and the radially inner side surface of the retaining block 500 after installation protrudes between 1.5-2.5 mm from the inner circular arc surface of the support member 300, that is, the conical section 510 or the spherical section of the retaining block protrudes between 1.5-2.5 mm from the inner circular arc surface of the support member 300.

[0022] To reduce the assembly difficulty between the male joint and the female joint and improve the assembly efficiency, a positioning protrusion 322 for facilitating the splicing of the male joint 320 and the female joint 330 is provided on the end of the male joint 320, and the positioning protrusion and the male joint are transitioned by an arc. Correspondingly, a positioning groove matching the positioning protrusion 322 is provided on the inner circle of the female joint 330.

[0023] Since the gap between the support ring and the rim is small, during the traditional locking process, the locking method between the support members is axial locking. During the traditional locking process, the locking method between the support members is axial locking. This operation makes it easy to interfere with the tire bead during the locking installation of the inner support body, resulting in limited operating space, large assembly difficulty, and low assembly efficiency. In this application, only the female joint has threaded holes, the male joint has through holes, and the locking method is radial locking. Therefore, there will be no interference with the tire during the locking installation; at the same time, the entire anti-loosening structure is simple, and no large torque is required for locking during installation, making the entire installation process simple and efficient.

[0024] Preferably, there is no gap between the radially combined surfaces when the male joint 320 and the female joint 330 are spliced, that is, the first combined surface 323 of the male joint and the second combined surface 332 of the female joint are designed to be parallel and the gap is zero to ensure the tightness of the connection between adjacent joints. A gap of 0.5-2.5 mm is left between the circumferentially mating surfaces when the male joint 320 and the female joint 330 are spliced, that is, there is a certain distance between the first mating surface 324 of the male joint and the second mating surface 333 of the female joint, and between the third mating surface 325 of the male joint and the fourth mating surface 334 of the female joint after assembly, further improving the dimensional tolerance when the two joints are spliced circumferentially, effectively reducing the assembly difficulty, and improving the assembly efficiency.

[0025] Preferably, the angle between the first joint surface 323 and the first mating surface 324 on the male joint and the angle between the first joint surface 323 and the third mating surface 325 are both between 100-130°, the angle between the second joint surface 332 and the second mating surface 333 on the female joint and the angle between the second joint surface 332 and the fourth mating surface 334 are both between 100-130°, and all the edges and corners between the integral support members are rounded. By designing the angle between the faces to be greater than 90° and the rounded design, the radial rigidity of the radially connected joint can be further reduced, and the impact resistance and fatigue resistance of the joint can be better guaranteed. At the same time, the local stress concentration of the support member when the tire assembly is running under a deflated load can be reduced, and the fatigue resistance of the support member can be improved.

[0026] A safety tire assembly mainly consists of a tire, a rim and the above-mentioned inner support body, specifically, the inner support body is sleeved on the mounting surface 210 of the rim 200 and is located inside the tire 100, wherein the structure of the tire, the structure of the rim, and the mounting structure between the tire and the rim are all prior art and are not described in detail here. Preferably, a gap of 0.2-1.5 mm is left between the inner ring surface of the inner support body after installation and the mounting surface 210 of the rim 200. The gap design between the inner support body and the rim can effectively reduce the difficulty of assembling the tire assembly and improve the assembly efficiency. When the above-mentioned inner support body is used, when the safety tire assembly is deflated, it can still continue to travel a long distance at a certain speed.

[0027] At the same time, the main body of the support member 300 in the present application is injection molded by a polymer, that is, except for the reinforcement block embedded in the support member, the reinforcement block is pre-buried in the concave joint, and the rest is integrally injection molded by a polymer, and the modulus of the polymer is between 1000-10000 and the density is between 0.8-2g / cm 3 between.

[0028] The support member 300 includes a support outer ring 370 arranged on the radial outer side to contact the tire 100 and a mounting inner ring 380 arranged on the radial inner side for being mounted on the rim 200. A plurality of meshes 371 are axially arranged on the support outer ring 370, that is, the support outer ring is arranged as a porous mesh structure, and the sea-land ratio of the mesh area is between 50% and 90%. The meshes 371 are arranged as polygonal or circular holes, preferably, the meshes are 3-6 polygonal or circular holes. The convex joint 320 and the concave joint 330 are arranged at both ends of the mounting inner ring 380, that is, the mounting inner ring is equivalent to the circumferential staggered arrangement of the support outer ring, so that the entire support member is Z-shaped in the axial direction.

[0029] The meshes enable the support member to undergo a certain deformation when the tire assembly is running with deflated air, and at the same time, they also facilitate heat dissipation and weight reduction. The specific setting of the meshes in this application enables the deformation amount of the support member in the radial direction to be between 2% and 15%, thereby improving the impact resistance of the tire assembly. At the same time, the contact pressure between the inner surface 110 of the tire and the outer arc surface 340 of the support member is reduced by more than 5%, which can reduce the stress on the tire, reduce tire heat generation, extend the tire wear time, and thus improve the driving ability of the tire when it is deflated.

[0030] A groove 311 is provided on the inner arc surface 310 of the support member 300, so that the support member is designed to be lightweight, and the positioning groove communicates with the groove, that is, the positioning groove is a part of the groove. At the same time, the included angle between the bottom surface 311a of the groove 311 and the side surface 311b of the groove 311 is between 100° and 130°. Preferably, both between the bottom surface 311a of the groove and the side surface 311b of the groove, and between the side surface 311b of the groove and the inner arc surface 310 are transitioned by an arc, and the radius of the arc is between R2 and R10.

[0031] Preferably, the circumferential length of the groove 311 is between 70% and 90% of the length of the inner arc surface 310, so that while ensuring the lightweight design, the groove also has good strength and impact resistance, and also reserves sufficient design space for the convex joints on the same support member.

[0032] Preferably, the circumferential cross-section of the support member 300 is set as a trapezoid that is narrow at the top and wide at the bottom, and the two radial sides can be symmetrically designed or asymmetrically designed, so that the inner support body formed by splicing it has a certain shock absorption ability, and at the same time, it also has good roll stiffness, thereby improving the ability of the tire assembly to maintain a correct body posture when running with deflated air, and the passing ability on different road surfaces.

[0033] Preferably, the outer coating of the support outer ring is coated with a wear-resistant coating to increase the wear-resistant performance of the inner support body.

Claims

1. An easily assembled inner support body, characterized in that: The inner support body is formed by circumferentially splicing at least two support members (300) through a mounting structure, wherein the mounting structure comprises a male joint (320) and a female joint (330) arranged at both ends of the support member (300), a fixing bolt (400) for fixing adjacent support members (300) is arranged between the male joint (320) and the female joint (330), and an anti-loosening structure for preventing the fixing bolt (400) from loosening is arranged on the male joint (320) and the female joint (330), and when splicing, the male joint (320) of one support member can cooperate with the female joint (330) of the adjacent support member.

2. The easily assembled inner support body according to claim 1, characterized in that: A positioning protrusion (322) is provided on the end of the male joint (320) for facilitating the splicing of the male joint (320) and the female joint (330), and a positioning groove matching the positioning protrusion (322) is provided on the inner ring of the female joint (330).

3. The easily assembled inner support body according to claim 1, characterized in that: There is no gap between the radial joint surfaces when the male joint (320) and the female joint (330) are spliced, and a gap of 0.5-2.5 mm is left between the circumferential mating surfaces when the male joint (320) and the female joint (330) are spliced.

4. The easily assembled inner support body according to claim 1, characterized in that: The anti-loosening structure comprises a reinforcing block (350) embedded in the concave joint (330), a threaded hole (331) matching the fixing bolt (400) is arranged in the concave joint (330), and the threaded hole (331) passes through the reinforcing block (350), and the convex joint (320) is provided with a bolt countersunk hole (321) for the fixing bolt (400) to pass through.

5. The easily assembled inner support body according to claim 4, characterized in that: The anti-loosening structure also includes a stop block (500) that can be set in the bolt countersunk hole (321) to prevent the fixing bolt (400) from withdrawing, and one end of the stop block (500) is set to be conical or spherical. After the stop block (500) is installed, the conical section or the spherical section is located radially inward, and the radial inner side surface of the stop block (500) after installation protrudes from the inner ring arc surface (310) of the support member (300) by between 1.5-2.5 mm.

6. A safety tire assembly, comprising a tire (100) and a rim (200), characterized in that: It also includes the inner support body described in any one of claims 1-5, wherein the inner support body is sleeved on the mounting surface (210) of the rim (200) and is located inside the tire (100), and a gap of 0.2-1.5 mm is left between the inner ring surface of the inner support body and the mounting surface (210) of the rim (200) after installation.

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