A wheel structure for a skateboard with high strength and impact resistance

Abstract

The present invention discloses a wheel structure for a skateboard with high strength and impact resistance, which includes a wheel body and a wheel core; the wheel body is assembled with the wheel core into one body at the base, and a partition cavity filled with non-Newtonian fluid is separated between the wheel body and the wheel core; the wheel body is formed of an elastic weather-resistant material, and the wheel body includes an inner wheel cavity and an outer wheel cavity. The inner wheel cavity and the outer wheel cavity are independent of each other and are separated by a diaphragm; a plurality of ribs are formed at intervals in the inner wheel cavity, and the cavity between the adjacent convex ribs in the inner wheel cavity is used as a pre-set airbag cavity; the outer wheel cavity includes a number of capsule cavities, the capsule cavities are long water-drop-shaped capsule cavities, and are staggered on the corresponding toroidal surface of the outer wheel cavity. The small head ends of the staggered long water-drop-shaped capsule cavities are located on the side of the wheel body close to the center line. The skateboard wheel of the present invention can effectively overcome the performance defects of the skateboard wheel in the prior art and improve the comprehensive performance of the wheel.

Description

Technical Field

[0001] The present invention relates to skateboard technology in the field of sports equipment, and particularly to a wheel structure for skateboards with high strength and impact resistance. Background Art

[0002] As the originator of extreme sports, skateboarding is a popular street extreme sport loved by young people in modern society. As the main sports equipment in skateboarding, it mainly consists of a board surface, brackets, cushion pads (cushion frames), wheels, etc.

[0003] Considering the safety usage requirements, skateboard wheels are required to have good elasticity, wear resistance, moderate wheel surface hardness, and sufficient friction coefficient with the road surface. Traditional skateboard wheels are composed of a wheel body and a wheel core. The wheel body is generally injection molded with polyurethane (PU) material with stable elasticity, while the wheel core is generally cast with aluminum or steel material. Its structure is simple, the cost is low, and it can meet the performance requirements such as anti-slip, wear resistance, compression resistance, and shock absorption for daily road practice and usage needs. However, considering the competitive requirements, this simple-structured polyurethane injection wheel still has defects, and it has poor adaptability to some U-shaped pools, downhill sites, and other highly competitive professional sites, mainly reflected in aspects such as anti-slip, compression resistance, shock absorption, and wheel body stability:

[0004] In terms of anti-slip and compression resistance and shock absorption, the wheel body of this simple-structured polyurethane injection wheel is usually an integrally formed structure, and its internal and external structures are the same, resulting in an insignificant shock absorption effect when the wheel surface is stressed. When the skateboard speed is relatively fast or there are small bumps on the road surface, it is easy to cause the skateboard to jolt and slip, affecting the usage experience and directly affecting the user's performance, and there will also be certain safety hazards.

[0005] In terms of wheel body stability, since the wheel body and the wheel core of the polyurethane injection wheel are mostly directly adhesively fixed through adhesives, the adhesion quality is uneven and the bonding property of the surface bonding method is poor. Moreover, the wheel body of the polyurethane injection wheel can only be shock-absorbed axially, and the buffer shock absorption effect for side forces is limited; during the skateboarding process, there are many body swinging movements. On the one hand, it is to increase the aesthetic feeling, and on the other hand, it can coordinate the body balance during the movement. These body swinging movements will drive the skateboard and the wheel body to swing. Even with the brackets for connection and force coordination, it is still easy for the wheel body to fall off at the bonding surface position. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a wheel structure for skateboards with high strength and impact resistance. This wheel structure for skateboards has good stability and has a better buffering effect on the impact force on the outer wheel surface and the side surface of the wheel body. It can be used as a professional skateboard wheel or a competition skateboard wheel to solve the defects in the above technical background.

[0007] The technical problem solved by the present invention is realized by the following technical solutions:

[0008] A wheel structure for a skateboard with high strength and impact resistance, comprising a wheel body and a wheel core;

[0009] The wheel body is assembled with the wheel core integrally at the base, and a partition cavity is formed between the inner side of the wheel body and the wheel core, and a non-Newtonian fluid is filled in the partition cavity as a buffer medium;

[0010] The wheel body is formed of an elastic weather-resistant material. The inner part of the wheel body includes an inner layer wheel cavity and an outer layer wheel cavity. The inner layer wheel cavity and the outer layer wheel cavity are independent of each other and are separated by a diaphragm; the inner layer wheel cavity in the wheel body corresponds to 35-50% of the wheel body ring diameter, while the outer layer wheel cavity corresponds to 15-20% of the wheel body ring diameter;

[0011] A plurality of ribs are formed at intervals in the inner layer wheel cavity. The inner layer wheel cavity uses the cavity between adjacent convex ribs as a pre-set airbag cavity, and the pre-set air pressure in the pre-set airbag cavity is 1.8-2.2 bar;

[0012] The outer layer wheel cavity includes a number of capsule cavities. The capsule cavities are long water-drop-shaped capsule cavities, which are arranged staggered on the corresponding ring surface of the outer layer wheel cavity. The small head ends of the staggered long water-drop-shaped capsule cavities are on the side of the wheel body close to the center line.

[0013] As a further limitation, the wheel core is cast and formed of aluminum or aluminum alloy material to minimize the weight of the wheel body.

[0014] As a further limitation, the elastic weather-resistant material used for the wheel body is polyurethane.

[0015] As a further limitation, an annular insertion groove is provided on the outer edge of the wheel core, and a socket matching the annular insertion groove is formed at the base of the wheel body; when the wheel body and the wheel core are assembled, glue is first applied in the annular insertion groove, and then with the wheel core as the bottom, the wheel body is embedded and assembled at the position of the annular insertion groove by a hot press assembly method and formed after the glue is cured.

[0016] As a further limitation, the wheel body wraps the wheel core at the outer edge of the base.

[0017] As a further limitation, the partition cavity is an annular flat partition cavity, and the cavity thickness of the partition cavity continuously decreases from the middle to both sides in the cavity section.

[0018] As a further limitation, the optional viscosity range of the non-Newtonian fluid is 10,000-30,000 Pa·S, and a one-component liquid silicone rubber is preferably used.

[0019] As a further limitation, the long water-drop-shaped capsule cavity is an atmospheric-pressure hollow cavity.

[0020] As a further limitation, a rubber block having the same size as the long water-drop-shaped capsule cavity is filled in the long water-drop-shaped capsule cavity, and the rubber block is one of butyl rubber, halogenated butyl rubber, acrylic rubber, silicone rubber, chloroprene rubber, and diene rubber.

[0021] Beneficial effects: The present invention provides a wheel structure for a skateboard with high strength and impact resistance. It sacrifices service life to obtain a significant improvement in performance. The skateboard wheel produced thereby has the characteristics of light weight and good bonding property. After molding, the structure is more stable and reliable. At the same time, it also has the advantages of good impact resistance, good toughness, and good resilience. It is especially suitable for mini cruisers and downhill skateboards, and can meet the high-end customization requirements of high-end skateboard players and professional athletes. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the inner wheel cavity in a preferred embodiment of the present invention.

[0024] Figure 3 It is a detailed structural diagram of the outer wheel cavity in a preferred embodiment of the present invention.

[0025] Figure 4 is Figure 3 a schematic diagram of the force-bearing state of the capsule cavity in a state.

[0026] Wherein: 1, wheel body; 2, wheel core; 3, capsule cavity; 4, first diaphragm; 5, pre-set airbag cavity; 6, non-Newtonian fluid; 7, process hole; 8, bearing sleeve; 9, outer edge; 10, socket; 11, second diaphragm; 12, rib. Specific Embodiments

[0027] In order to make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In the following embodiments, those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which this application belongs.

[0030] Refer to Figures 1 to 3 A preferred embodiment of a high-strength and impact-resistant wheel structure for a skateboard. In this embodiment, the wheel structure for the skateboard includes a wheel core 2 and a wheel body 1.

[0031] The wheel core 2 is integrally cast from aluminum alloy material. A hole is reserved at the center position of the wheel core 2, and a bearing sleeve 8 is sleeved at the hole position. Through this bearing sleeve 8, the whole wheel structure can be disassembled on the skateboard to facilitate replacement and maintenance. And evenly formed process holes 7 are also formed on the wheel disc surface of the wheel core 2. Through the process holes 7, the stress of the wheel core 2 can be optimized, and at the same time, combined with the aluminum alloy material of the wheel core 2, the weight of the wheel body can be reduced to the greatest extent, which has a beneficial effect on improving the performance of athletes.

[0032] The wheel body 1 and the wheel core 2 are assembled into one body. In different embodiments, there are three assembly methods for the wheel body 1 and the wheel core 2. One is to use special glue for bonding. In this bonding method, the wheel body 1 and the wheel core 2 are kept in surface contact, and glue is applied on the contact surface and then pressed and fixed. This assembly method has a simple process and relatively low structural requirements for the wheel body 1 and the wheel core 2, which is a low-cost implementation method; and the implementation method of another embodiment is to set an embedding structure, and the wheel body 1 is embedded and formed by a hot pressing method. This assembly method can withstand multi-directional forces and has good durability, but the process is slightly complicated; and this embodiment adopts the third assembly and forming method, which is a combination of the above two methods:

[0033] In this embodiment, the wheel core 2 is respectively provided with a circular insertion groove on both sides of the outer edge of the corresponding disc surface. This circular insertion groove serves as an assembly structure for integrally assembling the wheel body 1 at the outer disc surface position of the wheel core 2. The wheel body 1 has a circular insertion seat 10 at the position corresponding to the circular insertion groove, which is circular and matches the circular insertion groove. During assembly, first apply a layer of YH-818 adhesive in the circular insertion groove of the wheel core 2, and then, with the wheel core 2 as the base, the wheel body 1 is embedded and assembled at the circular insertion groove position through a hot pressing assembly method, and the insertion seat 10 is pressed into the circular insertion groove with the adhesive. After the adhesive is cured, the assembled wheel structure for the skateboard is formed.

[0034] The wheel body 1 is integrally formed of a polyurethane material with a hardness of 80-88A. The wheel body 1 is assembled and connected to the outer disk surface of the wheel core 2 at the base to form a whole. On the annular surface of the wheel body 1, three-layer cavity structures are separated by a first diaphragm 4 and a second diaphragm 11 from the inside out. The inner cavity is a partition cavity. After the assembly connection between the wheel body 1 and the wheel core 2 is realized, this partition cavity is located between the outer disk surface of the wheel core 2 and the second diaphragm 11. This partition cavity is an annular flat cavity structure, and the cavity thickness of this flat cavity continuously decreases from the middle to both sides in the cavity section. During the assembly and molding process of the wheel body 1 and the wheel core 2, a one-component liquid silicone rubber with a viscosity range of 25000-30000 Pa·S is filled in this flat cavity as a buffer medium.

[0035] The middle layer cavity structure in the wheel body 1 is as Figure 2 shown. This middle layer cavity is located between the first diaphragm 4 and the second diaphragm 11, corresponding to 45% of the wheel body ring diameter. This middle layer cavity area includes eight preset airbag cavities 5 arranged in a ring shape. The adjacent preset airbag cavities 5 are separated by ribs 12 integrally formed with the wheel body 1. The eight preset airbag cavities 5 are filled with high-pressure gas of 2.0±0.1 bar, so that each preset airbag cavity 5 has independent buffering performance. The outer layer cavity structure in the wheel body 1 includes several independent capsule cavities 3. The structural pattern of these capsule cavities 3 after being laid flat on a plane is as Figure 3 shown. These capsule cavities 3 are long water-drop-shaped capsule cavities, and their cavity thickness corresponds to 17% of the wheel body ring diameter, and they are staggered on the corresponding ring surface of the outer layer cavity according to the pattern as Figure 3 shown.

[0036] Under the technical conditions of this embodiment, when the wheel body 1 receives a frontal impact force, it can be buffered three times in sequence through the capsule cavities 3, the preset airbag cavities 5, and the non-Newtonian fluid 6. Cooperating with the integrally formed wheel body structure can effectively improve the impact resistance of the wheel surface, and the elastic output is also more stable. Compared with the traditional polyurethane encapsulated wheel, it can effectively reduce the burden on the skateboard bracket and the deformation amount of the skateboard deck under the stressed state, thereby reducing the bumpy feeling of the skateboard user on the deck and improving the stability during high-speed sliding. Therefore, it is more conducive to performing tricks, high-speed sliding, and improving the safety when landing after ollie jumps, outer rotations, inner rotations, and other aerial actions.

[0037] The independent cavity structures of the capsule cavities 3 in the middle layer cavity and the preset airbag cavities 5 in the outer layer cavity can prevent the impact on the entire wheel surface of the wheel body 1 after a point force, so the positioning is more accurate, which is more conducive to performing high-precision and high-difficulty actions such as stair jumping and grinding, and improving the stability and safety when landing after the actions are completed. And it can effectively reduce the phenomenon of deck rebound and the rebound force that is likely to occur under strong impact force conditions.

[0038] The long water-drop-shaped structure of the capsule cavity 3 is more suitable for absorbing side impact forces compared to the buffer capsule cavity structures of other regular structures. Therefore, it can buffer the side forces on the wheel body 1 during the swinging process of the skateboard body and other situations that may cause side forces on the outer edge of the wheel body 1. Its force-bearing state is as shown in Figure 4 the figure. When a unilateral side force acts on the large-head side of the capsule cavity 3, part of the kinetic energy of the force will be absorbed by the medium (such as air or other elastic materials) inside the capsule cavity 3, and the kinetic energy generated by the other part of the force will expand outward in the direction of the arrows shown on both sides of the small-head side of the corresponding capsule cavity 3 and be secondarily absorbed by two adjacent capsule cavities 3. This absorption method can effectively reduce the side forces on the capsule cavity 3, thereby reducing the probability of the skateboard tipping over during large swings of the board surface.

[0039] In summary, the skateboard wheel of this embodiment has significantly better performance than traditional polyurethane encapsulated wheels or other integrally formed solid wheels on the market. Its force-bearing characteristics make it more suitable for achieving high-difficulty and high-precision skateboard movements, and thus it is more suitable for in-depth customization improvements by mid- to high-end skateboard players or professional athletes.

[0040] In this embodiment, the corresponding capsule cavity 3 is an atmospheric-pressure hollow cavity to adapt to ground structures with flexible or plastic layers such as wooden floors, plastic floors, and asphalt floors. In another embodiment, the corresponding capsule cavity 3 is filled with butyl rubber blocks of the same size as the capsule cavity to adapt to rigid ground structures such as cement floors.

[0041] In this embodiment, considering the possible compression deformation of the outer edge part of the wheel core 2 when the side of the wheel body 1 is stressed, the wheel body 1 of this embodiment is provided with an outer wrap 9 at the outer edge of the base to structurally wrap the wheel core 2, so as to reduce the impact damage and friction damage caused by knocking on the side edge of the wheel core 2.

[0042] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheel structure for a skateboard with high strength and impact resistance, characterized in that, It includes a wheel body and a wheel core; The wheel body is assembled with the wheel core integrally at the base, and a partition cavity is formed between the inner side of the wheel body and the wheel core. A non-Newtonian fluid is filled in the partition cavity as a buffer medium; The wheel body is formed of an elastic weather-resistant material. The inner part of the wheel body includes an inner wheel cavity and an outer wheel cavity. The inner wheel cavity and the outer wheel cavity are independent of each other and are separated by a diaphragm. The inner wheel cavity in the wheel body corresponds to 35-50% of the wheel body ring diameter, while the outer wheel cavity corresponds to 15-20% of the wheel body ring diameter; A plurality of ribs are formed at intervals in the inner wheel cavity. The inner wheel cavity takes the cavity between adjacent convex ribs as a pre-set airbag cavity, and the pre-set air pressure in the pre-set airbag cavity is 1.8-2.2 bar; The outer wheel cavity includes a number of capsule cavities. The capsule cavities are long water-drop-shaped capsule cavities, which are arranged staggeredly on the corresponding ring surface of the outer wheel cavity. The small head ends of the staggeredly arranged long water-drop-shaped capsule cavities are on the side of the wheel body close to the center line.

2. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, characterized in that, The wheel core is cast and formed of aluminum or aluminum alloy material.

3. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, characterized in that The elastic weather-resistant material used for the wheel body is polyurethane.

4. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, wherein, An annular insertion groove is provided on the outer edge of the wheel core, and a socket matching the annular insertion groove is formed at the base of the wheel body; when the wheel body and the wheel core are assembled, glue is first applied in the annular insertion groove, and then with the wheel core as the base, the wheel body is embedded and assembled at the position of the annular insertion groove by a hot-press assembly method and formed after the glue is cured.

5. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, characterized in that The wheel body wraps the wheel core at the outer edge of the base.

6. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, wherein The partition cavity is an annular flat partition cavity, and the cavity thickness of the partition cavity continuously decreases from the middle to both sides in the cavity section.

7. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, wherein, The non-Newtonian fluid is a liquid rubber with a viscosity range of 10000-30000 Pa·S.

8. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, wherein The long water-drop-shaped capsule cavity is an atmospheric-pressure hollow cavity.

9. The high-strength and impact-resistant wheel structure for skateboards according to claim 1, wherein, The long water-drop-shaped capsule cavity is filled with a rubber block having the same size as the long water-drop-shaped capsule cavity. The rubber block is one of butyl rubber, halogenated butyl rubber, acrylic rubber, silicone rubber, chloroprene rubber, and diene rubber.

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