Luggage wheel

Abstract

The utility model relates to the field of luggage wheels, in particular to a luggage wheel, which comprises a soft annular wheel and a hard wheel core, the hard wheel core is arranged in a central hole position of the soft annular wheel and divides a space at the central position of the soft annular wheel into a left bearing mounting groove position and a right bearing mounting groove position, and bearings are assembled in the left bearing mounting groove position and the right bearing mounting groove position. The hard wheel core is arranged in the central hole of the soft annular wheel, so that the central part of the wheel is effectively supported, and the stress is enhanced. The hard wheel core is made of hard rubber materials, has high strength and rigidity and can bear large external force, and therefore the overall bearing capacity of the wheel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of luggage wheel, especially a luggage wheel. BACKGROUND

[0002] In the design of traditional luggage wheels, in order to reduce shock and noise, wheels made entirely of PU (polyurethane) material are usually used, and bearings are installed therein. However, in order to ensure the stability of the bearings and reduce the shaking during operation, the distance between the two bearings needs to be set relatively far, usually reaching 5-6 millimeters. This approach directly leads to an increase in the overall thickness of the wheel, limiting its application in situations that require lightweight design.

[0003] When trying to make the wheel thinner, problems arise. During landing tests or other high-load tests of the wheel set, the bearings are prone to fall out of the wheel due to insufficient structural strength of the wheel to support the stable operation of the bearings, which not only affects the normal operation of the wheel, but also greatly shortens its service life. On the other hand, if the wheel is made thicker to avoid the problem of bearings falling out, although it can improve the stability of the wheel to some extent, it also increases the weight and volume of the wheel, making it no longer meet the strict requirements of some specific application scenarios for lightweight and lightweight wheels.

[0004] In summary, the design of traditional luggage wheels has a certain contradiction between bearing stability and lightweight wheels. Therefore, it is necessary to develop a new type of luggage wheel structure to ensure the stable positioning of the bearings while achieving lightweight and lightweight wheels, thereby meeting the needs of different application scenarios. SUMMARY

[0005] To solve the above problems, the utility model provides a kind of luggage wheel, by embedding hard wheel core at the center hole position of soft annular wheel, the center part of wheel is effectively supported and stress strengthened. Hard wheel core adopts hard rubber material, has higher strength and rigidity, can withstand greater external force, thereby improving the overall carrying capacity of the wheel.

[0006] To achieve the above purpose, the utility model adopts the technical scheme: a kind of luggage wheel, including soft annular wheel and hard wheel core, wherein the hard wheel core is embedded at the center hole position of soft annular wheel, and the space at the center of soft annular wheel is divided into left and right bearing mounting slots, and the left and right bearing mounting slots are both equipped with bearings.

[0007] Further, the hard wheel core includes a hard annular baffle, and the left and right bearings are in close contact with the hard annular baffle.

[0008] Further, the soft annular wheel is made of PU material, and the hard wheel core is made of PC hard rubber material.

[0009] Further, the hard wheel core comprises a hard annular baffle and a first sleeve part formed on the surface of the hard annular baffle, and one of the bearing installation grooves is formed between the first sleeve part and the hard annular baffle, and the other bearing installation groove is formed between the hard annular baffle and the inner wall of the central hole of the soft annular wheel.

[0010] Further, the longitudinal section of the first sleeve part and the hard annular baffle is in a perpendicular T-shaped structure.

[0011] Further, the longitudinal section of the second sleeve part and the hard annular baffle is in a perpendicular L-shaped structure.

[0012] Further, the hard wheel core comprises a hard annular baffle and a third sleeve part formed on the surface of the hard annular baffle, and one of the bearing installation grooves is formed between the third sleeve part and the hard annular baffle, and the other bearing installation groove is formed between the hard annular baffle and the inner wall of the central hole of the soft annular wheel, and the longitudinal section of the third sleeve part and the hard annular baffle is in a perpendicular L-shaped structure.

[0013] Further, the connection between the third sleeve part and the hard annular baffle is a round corner transition.

[0014] Further, the bearing fixing ring is located at the center of the hard annular baffle, and the left and right bearings are tightly attached to the bearing fixing ring.

[0015] The beneficial effects of the utility model lie in that:

[0016] 1. The hard wheel core is embedded in the central hole of the soft annular wheel, and the central part of the wheel is effectively supported and stressed. The hard wheel core is made of hard rubber material, has high strength and rigidity, and can withstand large external force, thereby improving the overall carrying capacity of the wheel.

[0017] 2. The hard wheel core serves as a framework support, so that the wheel as a whole can maintain overall strength and stability while realizing lightweight and thinness. Moreover, the wheel as a whole can be 10-13mm, which is difficult to achieve in traditional full soft rubber material wheels. Through the implantation of the hard wheel core, not only the thickness of the wheel is reduced, but also the overall weight is reduced, meeting the demand of lightweight and thinness of the wheel in some application scenarios.

[0018] 3. The hard wheel core divides the space in the center of the soft ring-shaped wheel into left and right bearing installation slots, and is equipped with bearings. This structure makes the positioning of the bearings in the wheel more stable, avoiding the problem that the bearings in traditional wheels are easily bent out due to too small distance. At the same time, the supporting effect of the hard wheel core also makes the wheel more stable during operation, improving the overall stability and service life.

[0019] 4. By combining the hard wheel core with the soft ring-shaped wheel, the optimal use of materials can be achieved. The hard wheel core is made of hard rubber material, which has high strength and durability; the soft ring-shaped wheel has good elasticity and wear resistance. This material combination not only improves the overall performance of the wheel, but also reduces the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of Example 1.

[0021] Figure 2 is a cross-sectional structural schematic diagram of Example 1.

[0022] Figure 3 is a cross-sectional structural schematic diagram of Example 2.

[0023] Figure 4 is a cross-sectional structural schematic diagram of Example 3.

[0024] Figure 5 is a cross-sectional structural schematic diagram of Example 4.

[0025] Figure 6 is a structural schematic diagram of the bearing and hard wheel core after assembly in Example 4.

[0026] Figure 7 is a structural schematic diagram of the hard wheel core in Example 4.

[0027] Figure 8 is another perspective structural schematic diagram of the hard wheel core in Example 4.

[0028] BRIEF DESCRIPTION OF DRAWINGS: 1, soft ring-shaped wheel; 2, hard wheel core; 20, hard ring-shaped baffle; 21, first sleeve part; 22, second sleeve part; 23, third sleeve part; 24, round corner; 3, bearing fixing ring; 4, bearing. DETAILED DESCRIPTION

[0029] Example 1:

[0030] Please refer to Figures 1-2As shown, the utility model relates to a kind of luggage wheel, including soft annular wheel 1 and hard wheel core 2, wherein hard wheel core 2 is built in the central hole position of soft annular wheel 1, and the space at the center of soft annular wheel 1 is divided into left and right bearing installation slot, the left and right bearing installation slot are equipped with bearing 4.

[0031] Further, wherein hard wheel core 2 includes hard annular baffle 20, and the outer ring of left and right bearings 4 is respectively left with 0.1-0.2mm gap (so that the wheel and bearing outer ring can be freely rotated together around bearing inner ring) with hard annular baffle 20, further including bearing fixing ring 3, which is located at the center of hard annular baffle 20, and left and right bearings 4 are respectively close to bearing fixing ring 3.

[0032] Wherein hard annular baffle 20 is part of hard wheel core 2, not only provides additional support, enhances the strength of the center of wheel, but also plays the role of positioning bearing 4.The outer ring of left and right bearings 4 is respectively aligned with hard annular baffle 20, and this structure design ensures the position stability of bearing 4 in wheel, avoids the deviation or drop of bearing 4 in use process.In addition, bearing fixing ring 3 is located at the center of hard annular baffle 20, and the inner ring of left and right bearings 4 is respectively close to bearing fixing ring 3.This design further enhances the stability of bearing 4, so that bearing 4 is fixed in wheel in all directions.Even under the condition of high load or high speed operation, bearing 4 can maintain stable running state, thereby prolonging the service life of wheel.

[0033] Through the joint action of hard annular baffle 20 and bearing fixing ring 3, the overall strength and stability of wheel are significantly improved.This structure design makes wheel can better disperse stress when bearing external force, avoids damage caused by stress concentration.At the same time, stable bearing 4 operation also ensures the stability and safety of wheel when high speed running.

[0034] Further, soft annular wheel 1 is prepared from PU material, hard wheel core 2 is prepared from PC hard glue material, and soft annular wheel 1 is formed on the periphery of hard wheel core 2 using conventional injection molding process.

[0035] Due to the similarity in molecular structure and chemical properties between PC and PU materials, the PC and PU materials have good adhesion, which allows the hard wheel core 2 and the soft ring-shaped wheel 1 to form a firm bonding surface at the connection, avoiding problems such as delamination or cracking during use. Through the close adhesion of PC and PU materials, the hard wheel core 2 and the soft ring-shaped wheel 1 can be connected into one body, forming a luggage wheel with high strength, high stability, and good elasticity. This luggage wheel not only has excellent mechanical properties and service life, but also can meet various complex use environments and requirements.

[0036] By combining the soft ring-shaped wheel 1 and the hard wheel core 2 and using the conventional injection molding process for manufacturing, the overall performance of the luggage wheel is significantly improved. This structural design allows the wheel to better disperse stress, improve load capacity, and maintain good elasticity and wear resistance when subjected to external forces. At the same time, due to the introduction of the hard wheel core 2, the center strength of the wheel is strengthened, allowing the wheel to maintain stability and safety under high-speed operation or high-load conditions.

[0037] Further, the soft ring-shaped wheel 1 generally uses transparent PU material, which is the same color as the PC material (different transparent colors can also be made), making it seamlessly integrated with the PU material wheel, invisible, and seemingly all PU, increasing the aesthetic appearance.

[0038] At the same time, in this embodiment, by using transparent PC material and the same color as PU material, the boundary between the soft ring-shaped wheel 1 and the hard wheel core 2 becomes blurred, as if the entire wheel is made of the same material. This seamless design makes the wheel look more simple and smooth, increasing its aesthetic appearance.

[0039] Moreover, according to actual needs, transparent PC material can be made into different transparent colors with PU material, so this design provides users with diversified choices. Users can choose different colors or transparency of materials to customize their own wheels according to their preferences and needs, thus meeting individualized needs.

[0040] In this embodiment 1, the specific preparation process is to first prepare the hard wheel core 2 by injection molding. In embodiment 1, the hard wheel core 2 is made of PC hard glue material, and the soft ring-shaped wheel 1 is made of PU material. Then, the soft ring-shaped wheel 1 is formed around the hard wheel core 2 by the conventional injection molding process (i.e., the hard wheel core 2 is embedded in the center hole of the soft ring-shaped wheel 1).

[0041] Embodiment 2;

[0042] Please refer to Figure 3As shown, in this embodiment 1, the hard wheel core 2 is simply a hard annular baffle 20. In embodiment 2, the hard wheel core 2 is further improved based on embodiment 1. The hard wheel core 2 in embodiment 2 includes a hard annular baffle 20 and a first sleeve part 21 formed on the surface of the hard annular baffle 20. The first sleeve part 21 and the hard annular baffle 20 form one of the bearing installation slots. The other bearing installation slot is formed by the hard annular baffle 20 and the inner wall of the central hole of the soft annular wheel 1. In embodiment 2, the longitudinal section of the first sleeve part 21 and the hard annular baffle 20 is perpendicular to each other, forming a "T" shape structure.

[0043] In embodiment 2, the introduction of the first sleeve part 21 provides a more precise and stable installation position for the bearing 4. The first sleeve part 21 is formed on the surface of the hard annular baffle 20, and the first sleeve part 21 and the hard annular baffle 20 form one of the bearing installation slots. This design enables the bearing 4 to be more firmly installed in the wheel, improving the stability and service life of the bearing 4. The longitudinal section of the first sleeve part 21 and the hard annular baffle 20 is perpendicular to each other, forming a "T" shape structure. This structural design not only enhances the overall strength of the hard wheel core 2, but also makes the positioning of the bearing installation slot more accurate. The "T" shape structure design also facilitates the installation of the bearing 4, improving the maintenance efficiency of the wheel.

[0044] Embodiment 3:

[0045] Please refer to Figure 4 As shown, embodiment 3 is also a further improvement of the hard wheel core 2 based on embodiment 1. The hard wheel core 2 in embodiment 3 includes a hard annular baffle 20 and a second sleeve part 22 formed on the bottom surface and the surface of the hard annular baffle 20. The second sleeve part 22 and the hard annular baffle 20 form two bearing installation slots.

[0046] In embodiment 3, the longitudinal section of the second sleeve part 22 and the hard annular baffle 20 is perpendicular to each other, forming an "L" shape structure.

[0047] Double-sided design of the second sleeve part 22: Unlike embodiment 2, which only sets a sleeve part on the surface of the hard annular baffle 20, embodiment 3 adds a sleeve part, i.e. the second sleeve part 22, on the bottom surface of the hard annular baffle 20. This design not only makes full use of the space of the hard annular baffle 20, but also provides two symmetrical and stable installation positions for the bearing 4. The double-sided design of the second sleeve part 22 provides two symmetrical and stable installation positions for the bearing 4, enabling the bearing 4 to maintain better stability and balance during operation. This helps to reduce the wear and failure rate of the bearing 4 and improve the overall performance of the wheel.

[0048] The second sleeve part 22 and the hard annular baffle 20 form a "L" shape structure which is perpendicular to each other. The "L" shape structure enhances the structural strength of the hard wheel core 2, so that the wheel can better resist deformation and breakage when subjected to external forces. The "L" shape structure also allows the bearing 4 to be more closely attached to the hard wheel core 2 during installation, reducing the shaking and wear during operation, thereby prolonging the service life of the bearing 4.

[0049] Example 4:

[0050] Referring to Figures 5-8 As shown in FIG. 4, Example 4 is a further improvement on the basis of Example 2. In Example 4, the hard wheel core 2 includes a hard annular baffle 20 and a third sleeve part 23 formed on the surface of the hard annular baffle 20. One of the bearing installation slots is formed between the third sleeve part 23 and the hard annular baffle 20, and the other bearing installation slot is formed by the hard annular baffle 20 and the inner wall of the central hole of the soft annular wheel 1.

[0051] The difference between Example 4 and Example 2 is that the third sleeve part 23 and the hard annular baffle 20 form a "L" shape structure which is perpendicular to each other, and the connection between the third sleeve part 23 and the hard annular baffle 20 is a round corner 24 transition. In Example 4, the overall cross-section of the hard wheel core 2 is U-shaped. The round corner 24 transition is because in the injection process, the PU raw material is liquid, but has a certain viscosity. The PU raw material flows into the wheel cavity by its own gravity, and the shape design of the round corner 24 transition is beneficial to the filling of the PU liquid into the cavity without generating bubbles, ensuring the quality.

[0052] The "L" shape structure of the third sleeve part 23 provides a stable installation position for the bearing 4, ensuring the stability and balance of the bearing 4 during operation. This helps to reduce the wear and failure rate of the bearing 4, prolonging the service life of the wheel. Moreover, the design of the round corner 24 transition allows the PU liquid to flow more smoothly into the wheel cavity during the injection process, avoiding the generation of bubbles and uneven filling. This improves the quality of the wheel, reduces the rate of defective products, and reduces production costs. Although the round corner 24 transition is used between the third sleeve part 23 and the hard annular baffle 20, it does not weaken the overall structural strength of the hard wheel core 2. On the contrary, through reasonable structural design and material selection, the hard wheel core 2 can still maintain sufficient strength and rigidity to withstand various external forces.

[0053] Overall, the hard wheel core 2 design in Example 4 achieves improved bearing 4 installation stability, optimized pouring process, enhanced structural strength, and improved aesthetics by introducing the "L" shaped third sleeve portion 23 and the rounded corner 24 transition design. These improvements make the luggage wheel more widely applicable and competitive in the mechanical or wheel manufacturing field.

[0054] Please refer to Figures 1-8 As shown below, these design implementations 1-4 are summarized:

[0055] Example 1 (Basic Form): The hard wheel core 2 is composed of only the hard annular baffle 20, and the bearing installation slot is formed by the hard annular baffle 20 and the inner wall of the soft annular wheel 1 center hole. This is the simplest and most direct design form, suitable for occasions where the wheel core structure is not highly required.

[0056] Example 2: The hard wheel core 2 includes the hard annular baffle 20 and the first sleeve portion 21 formed on the surface of the hard annular baffle 20, forming a "T" shaped structure. This design improves the installation stability of the bearing 4 and the overall strength of the wheel core.

[0057] Example 3: The hard wheel core 2 includes the hard annular baffle 20 and the second sleeve portion 22 formed on the bottom and surface of the hard annular baffle 20, forming an "L" shaped structure. This design not only improves the installation stability of the bearing 4, but also optimizes the stress distribution of the wheel core.

[0058] Example 4 (Preferred Design): The hard wheel core 2 includes the hard annular baffle 20 and the third sleeve portion 23 formed on the surface of the hard annular baffle 20, forming an "L" shaped structure, and the connection between the third sleeve portion 23 and the hard annular baffle 20 adopts a rounded corner 24 transition design. This design maintains the installation stability of the bearing 4 while optimizing the pouring process, improving the quality of the wheel.

[0059] These four design forms provide multiple choices, allowing flexible selection according to specific use requirements, production processes, and cost considerations. For example, for occasions requiring high strength and stability, Example 2 or Example 4 can be chosen; for occasions requiring optimization of the pouring process, Example 4 is the best choice. The basic Example 1 is suitable for occasions where the wheel core structure is not highly required; Examples 2 and 3 are suitable for occasions where the bearing 4 installation stability and wheel core strength are highly required; and the preferred design Example 4 combines the advantages of the previous examples, suitable for occasions where the quality, stability, and pouring process of the wheel are highly required. By providing multiple design examples, users can choose the most suitable hard wheel core 2 design according to actual needs. This flexibility not only meets the needs of different users, but also improves the competitiveness and market adaptability of the product.

[0060] The above embodiments only describe the preferred embodiments of the utility model, and do not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by the ordinary engineering technicians in the art without departing from the design spirit of the utility model shall fall within the protection scope determined by the claims of the utility model.

Claims

1. A luggage wheel, characterized by: The application relates to a soft ring wheel and a hard wheel core, wherein the hard wheel core is arranged at the center hole position of the soft ring wheel and divides the space at the center of the soft ring wheel into left and right bearing mounting grooves, and the left and right bearing mounting grooves are respectively provided with bearings.

2. A luggage wheel according to claim 1, wherein: The hard wheel core comprises a hard annular baffle, and the left and right bearings are respectively attached to the hard annular baffle.

3. The luggage wheel according to claim 1, wherein: The soft ring wheel is made of PU material, the hard wheel core is made of PC hard rubber material, and the soft ring wheel is formed on the periphery of the hard wheel core by using a conventional pouring forming process.

4. The luggage wheel according to claim 1, wherein: The hard wheel core comprises a hard annular baffle and a first sleeve part formed on the surface of the hard annular baffle, one of the bearing mounting grooves is formed between the first sleeve part and the hard annular baffle, and the other bearing mounting groove is formed between the hard annular baffle and the inner wall of the center hole of the soft ring wheel.

5. A luggage wheel according to claim 4, wherein: The longitudinal section of the first sleeve part and the hard annular baffle is in a perpendicular "T" shape structure.

6. The luggage wheel according to claim 1, wherein: The hard wheel core comprises a hard annular baffle and a second sleeve part formed on the bottom surface and the surface of the hard annular baffle, and the two bearing mounting grooves are formed between the second sleeve part and the hard annular baffle.

7. A luggage wheel according to claim 6, wherein: The longitudinal section of the second sleeve part and the hard annular baffle is in a perpendicular "L" shape structure.

8. The luggage wheel according to claim 1, wherein: The hard wheel core comprises a hard annular baffle and a third sleeve part formed on the surface of the hard annular baffle, one of the bearing mounting grooves is formed between the third sleeve part and the hard annular baffle, the other bearing mounting groove is formed between the hard annular baffle and the inner wall of the center hole of the soft ring wheel, and the longitudinal section of the third sleeve part and the hard annular baffle is in a perpendicular "L" shape structure.

9. A luggage wheel according to claim 8, wherein: The connection between the third sleeve part and the hard annular baffle is a round corner transition.

10. A luggage wheel according to any one of claims 2 to 9, wherein: The application further relates to a bearing fixing ring, which is arranged at the center of the hard annular baffle and is attached to the left and right bearings.

Images