PU tire

Abstract

The utility model relates to a PU (polyurethane) tire which comprises a solid tire and a supporting and buffering assembly, and the solid tire is embedded in the periphery of the supporting and buffering assembly; a plurality of PU plates are annularly arranged on the solid tire; the supporting and buffering assembly comprises a supporting block, a fixing steel ring, an edge protecting ring, a center column and a sliding column. By arranging the supporting and buffering assembly, the solid tire is supported through cooperation of a supporting block and a fixing steel ring, when the uneven ground appears, a center column jacks a sliding column according to the flatness of the ground, the sliding column can buffer jolt to a certain degree in the supporting block through the acting force of a spring, and therefore the comfortable experience of a user is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of tires, and in particular relates to a PU tire. Background Art

[0002] PU tires, also known as polyurethane tires, are a type of tire made from polyurethane cast elastomer raw materials.

[0003] A Chinese patent discloses a PU foam solid tire (CN216833060U), which includes an inner tube and an outer tube, with a reinforcement layer provided between the inner tube and the outer tube; an inner nylon ring is provided inside the inner tube, and a card slot is provided on both sides of the inner tube inner ring; an outer nylon ring is provided inside the outer tube; the reinforcement layer includes an inner rubber layer and an outer rubber layer. The inner tube of the utility model is provided with a PU polyurethane foam layer, which reduces the weight of the PU foam solid tire and thus reduces the production cost. The inner nylon ring strengthens the structural strength of the inner tube, thereby strengthening the clamping tightness between the inner tube and the wheel hub; the outer tube is provided with a high-density polyurethane elastic layer, which improves the wear resistance of the PU foam solid tire. The outer nylon ring strengthens the structural strength of the outer tube, thereby improving the wear resistance of the outer tube; the provision of the reinforcement layer improves the structural strength, wear resistance and deformation resistance of the PU foam solid tire.

[0004] After searching, it was found that the above-mentioned tires lacked protection measures against ground sand and gravel when in use. When encountering sharp stones or large stones, not only would the objects used be bumpy, affecting the user experience, but the tires would also be rubbed by the sand and gravel, causing small-scale wear, thereby affecting the service life of the tires. Utility Model Content

[0005] The utility model provides a PU tire, which can solve the technical problems of defects in the use experience and service life of the above-mentioned tires.

[0006] The utility model is implemented by the following technical solutions:

[0007] A PU tire comprises a solid tire and a support and buffer assembly, wherein the solid tire is embedded in the outer periphery of the support and buffer assembly;

[0008] A plurality of PU plates are provided around the outer surface of the solid tire;

[0009] The support and buffer assembly includes a support block, a fixed steel ring, a side guard ring, a center column and a sliding column; the solid tire is embedded in the outer periphery of the fixed steel ring, and the support block is fixedly arranged on the inner ring of the fixed steel ring;

[0010] A buffer cavity extending in the left-right direction is provided in the middle of the support block, a convex edge extending inward is provided in the buffer cavity to form a buffer ring, and a plurality of cavity holes are provided on the inner wall of the buffer ring;

[0011] The central column passes through the inner ring of the buffer ring, and a plurality of sliding columns corresponding to the cavities are provided on the outer ring of the central column, so that the central column and the buffer ring are connected in a coordinated manner;

[0012] The two edge protection rings are fixedly arranged at the left and right ends of the central column respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting up a support and buffer assembly, the solid tire is supported by the support block and the fixed steel ring. When the ground is uneven, the center column pushes the sliding column according to the flatness of the ground. The sliding column uses the force of the spring in the support block to buffer the bumps to a certain extent, thereby ensuring the comfort of the user experience.

[0015] 2. By setting up PU plates and rings, the special shape of the PU plates is used to protect the outer curved surface of the solid tire. At the same time, since the rings divide multiple PU plates, there are gaps between each PU plate. The gaps change the range of sand and stone friction from a curved surface to multiple small curved surfaces, thereby reducing the friction range and protecting the solid tire to a certain extent, thereby extending its service life.

[0016] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached figure:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a side structural diagram of the present utility model;

[0020] Figure 3 This is a schematic diagram of the disassembly of the structure of the utility model;

[0021] Figure 4 This is a disassembled schematic diagram of the support and buffer assembly of the present invention;

[0022] Figure 5 It is a cross-sectional schematic diagram of the support and buffer assembly of the present utility model.

[0023] In the figure: 10, solid tire; 11, support block; 12, PU board; 13, ring mouth; 14, fixed steel ring; 15, rubber ring; 16, edge protection ring; 17, center column; 18, buffer ring; 19, buffer cavity; 20, sliding column; 21, spring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0025] like Figures 1 to 5 As shown, a PU tire comprises a solid tire 10 and a support and buffer assembly, wherein the solid tire 10 is embedded in the outer periphery of the support and buffer assembly;

[0026] A plurality of PU plates 12 are provided on the outer surface of the solid tire 10;

[0027] The support and buffer assembly includes a support block 11, a fixed steel ring 14, a side guard ring 16, a center column 17 and a sliding column 20; the solid tire 10 is embedded in the outer periphery of the fixed steel ring 14, and the support block 11 is fixedly arranged on the inner ring of the fixed steel ring 14;

[0028] A buffer cavity 19 extending in the left-right direction is formed in the middle of the support block 11. A buffer ring 18 is formed in the buffer cavity 19 with an inwardly extending convex edge. The inner wall of the buffer ring 18 is provided with a plurality of cavities 181.

[0029] The central column 17 passes through the inner ring of the buffer ring 18, and a plurality of sliding columns 20 corresponding to the cavities 181 are provided on the outer ring of the central column 17, so that the central column 17 is connected with the buffer ring 18 in a coordinated manner;

[0030] The two edge protection rings 16 are fixedly mounted on the left and right ends of the central column 17 .

[0031] This device supports the solid tire 10 by setting a support and buffering assembly, and uses the cooperation of the support block 11 and the fixed steel ring 14. When the ground is uneven, the center column 17 pushes the sliding column 20 in the corresponding direction according to the flatness of the ground. The connection method of the sliding column 20 in the support block 11 gives it a certain elastic deformation ability, which can buffer bumps to a certain extent, thereby ensuring the comfort of the user experience.

[0032] Furthermore, the outer side surface of the solid tire 10 is an arc-shaped surface, and the PU plate 12 is a hexagonal plate, and the PU plate 12 is arranged corresponding to the arc-shaped surface of the solid tire 10;

[0033] The solid tire 10 is provided with an annular opening 13, which symmetrically separates the PU sheet 12 from the solid tire 10. By providing the PU sheet 12 and the opening 13, the special shape of the PU sheet 12 protects the outer curved surface of the solid tire 10. Furthermore, because the opening 13 separates the multiple PU sheets 12, there are gaps between the PU sheets 12. These gaps reduce the area of friction between the solid tire 10 and sand and stones from the entire curved surface to multiple smaller curved surfaces, thereby reducing the friction range and protecting the solid tire 10 to a certain extent, thereby extending its service life.

[0034] Furthermore, the left and right side profiles of the support block 11 are curved, and the support block 11 is a five-pointed star-shaped structure with five support arms. The working principle is as follows: a fixed steel ring 14 connected to the outer curved surface of the support block 11 supports the inner side of the solid tire 10. Combined with the five-pointed star structure of the support block 11, it ensures stable support for the inner side of the solid tire 10. The curved corners of the five-pointed star structure provide space for the solid tire 10 to absorb shock and cushion.

[0035] Furthermore, the sliding column 20 is a nail-shaped column, and a spring 21 is fixedly connected to the nail-shaped column. The spring 21 passes through the cavity 181 and enters the interior of the buffer ring 18;

[0036] The cavity 181 is provided with a closing end, and the outer end of the spring 21 abuts against the closing end. Figure 5 As shown, the buffer cavity 19 is approximately an I-shaped column hole as a whole, and the center column 17 and the two edge protection rings 16 form an I-shaped cylinder corresponding to the shape of the buffer cavity 19;

[0037] Furthermore, a rubber ring 15 is provided on the outer periphery of the edge protection ring 16 so that the edge protection ring 16 is sealed against the support block 11 to close the buffer cavity 19 .

[0038] When using:

[0039] When the solid tire 10 is rolling and encounters an uneven ground surface, such as a sunken ground surface, the bottom surface of the solid tire 10 falls into the sunken ground. However, the position of the center column 17 is supported by the cooperation of the bottom slide column 20 and the spring 21. At the same time, the spring 21 cooperates to buffer the impact of the fall, so that the slide column 20 on the center column 17 is driven by the force of the spring 21 to reciprocate in the buffer ring 18. At the same time, the slide column 20 squeezes the corresponding spring 21 by its own shape, and the center column 17 is able to move inside the buffer cavity 19.

[0040] At the same time, the center column 17 drives the edge protection rings 16 at both ends to buffer the friction between themselves and the buffer cavity 19 with the help of the material of the rubber ring 15. At this time, the rubber ring 15 plays a special role in buffering friction and protecting the edge protection rings 16.

[0041] Finally, it should be noted that the buffering direction of the center column 17 is determined by the flatness of the ground. Grounds of different flatness can push the center column 17 in different directions. Therefore, the position of the sliding column 20 driven by the center column 17 is also different, and the buffering force is also different. However, with the assistance of the spring 21 and the rubber ring 15, the bumps of the road can be buffered on the center column 17, reducing the possibility of the solid tire 10 transmitting bumps, thereby ensuring the user's comfortable experience.

[0042] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A PU tire, characterized by: It comprises a solid tire (10) and a support and buffer component, wherein the solid tire (10) is embedded in the outer periphery of the support and buffer component; A plurality of PU plates (12) are provided around the outer surface of the solid tire (10); The support and buffer assembly comprises a support block (11), a fixed steel ring (14), a side guard ring (16), a center column (17) and a sliding column (20); the solid tire (10) is embedded in the outer periphery of the fixed steel ring (14), and the support block (11) is fixedly arranged on the inner ring of the fixed steel ring (14); A buffer cavity (19) extending in the left-right direction is provided in the middle of the support block (11); a buffer ring (18) is formed by an inwardly extending convex edge in the buffer cavity (19); and a plurality of cavity holes (181) are provided on the inner wall surface of the buffer ring (18); The central column (17) passes through the inner ring of the buffer ring (18), and a plurality of sliding columns (20) corresponding to the cavities (181) are provided on the outer ring of the central column (17), so that the central column (17) and the buffer ring (18) are connected in a coordinated manner; Two edge protection rings (16) are fixedly arranged at the left and right ends of the central column (17) respectively.

2. A PU tire according to claim 1, characterized in that: The outer side surface of the solid tire (10) is an arc-shaped surface, the PU plate (12) is a hexagonal plate, and the PU plate (12) is arranged corresponding to the arc-shaped surface of the solid tire (10); The solid tire (10) is provided with an annular ring opening (13) for separating the PU plate (12) and the solid tire (10) in a left-right symmetrical manner.

3. The PU tire according to claim 1, characterized in that: The left and right side profiles of the support block (11) are arc-shaped, and the support block (11) is a five-pointed star structure with five support arms.

4. The PU tire according to claim 1, characterized in that: The sliding column (20) is a nail-shaped column, and a spring (21) is fixedly connected to the nail-shaped column, and the spring (21) passes through the cavity (181) and enters the interior of the buffer ring (18); The cavity (181) is provided with a closing end, and the outer end of the spring (21) abuts against the closing end.

5. The PU tire according to claim 1, characterized in that: A rubber ring (15) is provided on the outer periphery of the edge protection ring (16), so that the edge protection ring (16) is sealed and attached to the support block (11) to realize the closed buffer cavity (19).

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