Caster structure and mobile device

Abstract

The utility model discloses a trundle structure and mobile device relates to mechanical moving technical field, wherein, the trundle structure includes trundle support, two gyro wheel and at least one wheel axle, the wheel axle is arranged in the trundle support, the wheel axle has two connecting sections, and two connecting sections are exposed respectively on the opposite sides of the trundle support, and the end of each connecting section away from the trundle support forms a limiting portion, each gyro wheel rotatable sleeve is arranged in a connecting section, and each gyro wheel is located between the trundle support and a limiting portion.

Description

Technical Field

[0001] This utility model relates to the field of mechanical mobility technology, and in particular to a caster structure and a mobile device. Background Technology

[0002] Casters, as core components of mobile equipment, are widely used in home appliances, medical, industrial, and logistics fields. Traditional double-wheel casters generally adopt a structure with a long metal axle and screws at both ends for securing. Specifically, the axle passes through the caster bracket, rollers are inserted on both sides, and then the machine screws are tightened for positioning. However, when used under high-speed pushing or bumpy conditions, the rollers are subjected to continuous lateral impact forces, which can easily force the screws to rotate in the opposite direction and loosen. Once the screws come loose, the roller will fall off instantly, causing equipment to tip over, requiring downtime for maintenance, and posing a significant safety hazard. Utility Model Content

[0003] The main purpose of this utility model is to propose a caster structure and mobile device, which aims to solve the problems of easy loosening of screws and easy detachment of rollers in traditional caster structures by the assembly design of the wheel axle and caster bracket and the setting of the wheel axle end limiting part, thereby improving the connection stability and safety of the caster structure.

[0004] To achieve the above objectives, the caster structure proposed in this utility model includes: Caster bracket; At least one axle is provided through the caster bracket, the axle having two connecting sections, the two connecting sections being exposed on opposite sides of the caster bracket, and a limiting portion being formed at the end of each connecting section away from the caster bracket; Two rollers, each of which is rotatably fitted onto a connecting section, and each roller is located between the caster bracket and a limiting part.

[0005] This utility model also proposes a mobile device including the caster structure described above. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0007] Figure 1 A schematic diagram of an embodiment of the caster structure provided by this utility model; Figure 2 A cross-sectional view of an embodiment of the caster structure provided by this utility model; Figure 3 for Figure 2 Enlarged view of section A in the middle; Figure 4 An exploded structural diagram of an embodiment of the caster structure provided by this utility model.

[0008] Explanation of icon numbers: 100. Caster structure; 1. Caster bracket; 11. Fixing groove; 12. Slot; 2. Axle; 21. Connecting section; 211. Limiting part; 22. Fixing section; 3. Roller; 4. Bearing; 5. Bushing; 6. Assembly housing; 61. Mounting groove; 62. Receiving groove; 63. Snap-fit.

[0009] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0011] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0012] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0013] This utility model proposes a caster structure 100.

[0014] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the caster structure 100 includes a caster bracket 1, two rollers 3 and at least one axle 2. The axle 2 passes through the caster bracket 1 and has two connecting sections 21. The two connecting sections 21 are respectively exposed on opposite sides of the caster bracket 1. A limiting part 211 is formed at the end of each connecting section 21 away from the caster bracket 1. Each roller 3 is rotatably sleeved on a connecting section 21 and each roller 3 is located between the caster bracket 1 and a limiting part 211.

[0015] In this technical solution, the integral caster structure 100 replaces the traditional screw fastening with a limiting part 211 formed at the end of the axle 2. When the roller 3 is subjected to lateral impact, the lateral impact is directly borne by the axle 2 body and transmitted to the caster bracket 1. The force transmission path is short and continuous, which can directly resist the action of lateral force and avoid the tendency of the roller 3 to loosen. Structurally, it eliminates the hidden danger of the roller 3 loosening and falling off due to the use of screws. The limiting part 211 is integrally formed on the axle 2. The integral forming of the two can be achieved by spinning. The limiting part 211 has a much greater capacity to bear lateral impact than screw connection. Even under harsh working conditions such as long-term high-speed pushing or frequent bumps, it can firmly limit the position of the roller 3, prevent the roller 3 from falling off and causing the equipment to tip over, and greatly improve the safety of use. At the same time, the integrally formed structure reduces the screw assembly process, reduces production complexity and assembly cost, and eliminates the need to worry about maintenance problems after the screws loosen, extending the service life of the caster structure 100 and improving the continuity of mobile equipment operation.

[0016] Specifically, the caster bracket 1, as the core supporting component of the caster structure 100, provides an installation carrier for the axle 2, connects to the mobile device body, bears the weight of the device and transmits the force, provides a stable assembly base for the axle 2 and the roller 3, ensures that all components work together, and enables the caster structure 100 to stably bear the weight of the device. The roller 3 is laterally limited by the limiting part 211 and the caster bracket 1 to prevent the roller 3 from loosening and falling off due to the use of screws, thereby avoiding shaking caused by unstable support during movement.

[0017] The axle 2 passes through the caster bracket 1 to form connecting sections 21 on both sides, providing rotational support for the roller 3. The end of the connecting section 21 away from the caster bracket 1 forms a limiting part 211, which directly limits the axial movement of the roller 3, replacing the traditional screw locking. The limiting part 211 and the axle 2 are an integral structure with high structural strength, which can withstand the continuous lateral impact force under high-speed pushing or bumpy conditions, and will not have the problem of reverse rotation and loosening.

[0018] The roller 3 is fitted onto the connecting section 21 of the wheel axle 2. The equipment moves by rolling, reducing the frictional resistance between the equipment and the ground. The rotatable design makes it easier to push the equipment. Combined with the stable support of the wheel axle 2, it ensures a smooth movement. The roller 3 is confined between the caster bracket 1 and the limiting part 211, and the axial displacement is strictly limited, reducing the risk of falling off.

[0019] Please see Figure 2 and Figure 3 In one embodiment, each roller 3 has a bearing 4 on its inner peripheral wall, and each bearing 4 is fitted onto a connecting section 21. The limiting part 211 abuts against the side wall of the bearing 4 for limiting. The core function of the bearing 4 is to optimize the rotation performance of the roller 3 and enhance the reliability of the limiting. The bearing 4 is fitted onto the connecting section 21 of the wheel axle 2 and is adapted to the inner peripheral wall of the roller 3, reducing the frictional resistance when the roller 3 rotates, making the device push more smoothly and effortlessly. At the same time, the limiting part 211 directly abuts against the side wall of the bearing 4, indirectly limiting the axial movement of the roller 3 through the bearing 4, avoiding wear caused by direct contact between the limiting part 211 and the roller 3. The addition of the bearing 4 significantly reduces the frictional loss between the roller 3 and the wheel axle 2, extending the service life of the roller 3 and the wheel axle 2, especially suitable for high-frequency, long-distance movement scenarios. The abutment method between the limiting part 211 and the bearing 4 ensures the axial fixing effect of the roller 3 and avoids the deformation of the limiting part 211 due to direct friction, ensuring the long-term stability of the limiting function. Based on the original one-piece molded limiting part 211 to prevent detachment, the addition of bearing 4 makes the caster structure 100 move more flexibly and smoothly, reducing noise and jamming when pushing the equipment; the cooperation between the limiting part 211 and bearing 4 makes the axial limiting more precise, and even under bumpy conditions, the roller 3 will not move axially, further improving the safety and stability of the caster structure 100 and adapting it to more harsh usage scenarios.

[0020] Please see Figure 2 and Figure 3In one embodiment, the caster structure 100 includes two axles 2, each axle 2 connected to a caster bracket 1. Each axle 2 has a fixed section 22 and a connecting section 21 connected to each other. The fixed section 22 is connected to the caster bracket 1. The two axles 2 are independently connected to the caster bracket 1. Each axle 2 is securely assembled with the caster bracket 1 through the fixed section 22. The connecting section 21 is specifically used to mount the rollers 3, so that each roller 3 has its own dedicated support carrier, avoiding the force concentration caused by a single axle 2 bearing the rollers 3 on both sides. The connection between the fixed section 22 and the caster bracket 1 makes the axle 2 more firmly installed, and can better distribute the weight of the equipment and the impact force during movement. The dual axle 2 design makes the force on the rollers 3 on both sides more balanced, realizing independent distribution and uniform transmission of load, reducing the overload of one side of the roller 3, and at the same time facilitating the replacement of axle 2 or roller 3 on one side, reducing maintenance costs. Based on the one-piece molded limiting part 211 to prevent detachment, the dual wheel axle 2 makes the support stability of the caster structure 100 stronger. Even under bumpy or heavy-load conditions, it can avoid the roller 3 from getting stuck due to the deformation of the wheel axle 2. The independent wheel axle 2 assembly design improves the caster's versatility and ease of maintenance, extends the overall service life, and adapts to more heavy-duty mobile equipment scenarios.

[0021] Please see Figure 2 and Figure 3 In one embodiment, the caster bracket 1 has two fixing slots 11, and each fixing segment 22 is accommodated in one fixing slot 11. The two fixing slots 11 are precisely matched with the fixing segments 22 of the axle 2, providing installation space for the axle 2 and preventing displacement or misalignment of the axle 2 during assembly or use, ensuring that the connection position between the axle 2 and the bracket is always accurate. The fixing slots 11 limit the accommodating and positioning of the fixing segments 22, making the installation of the axle 2 more convenient, allowing for quick positioning without additional calibration and improving assembly efficiency; at the same time, it restricts the radial and circumferential movement of the axle 2, enabling the axle 2 to more stably bear the weight and impact of the equipment, reducing component wear caused by the shaking of the axle 2 during use. With the balanced force distribution of the dual axles 2 and the anti-dropping limit part 211, the design of the fixing groove 11 makes the caster structure 100 more stable as a whole. Even under heavy load or bumpy conditions, the axles 2 will not loosen or shift, and the rollers 3 will rotate more smoothly. The precise assembly positioning also ensures the coaxiality of the rollers 3 on both sides, reduces jamming and noise when pushing, extends the overall service life of the caster structure 100, and is suitable for more heavy-load and high-frequency use scenarios.

[0022] To enhance the connection strength and structural integrity between the axle 2 and the caster bracket 1, in one embodiment, each axle 2 and caster bracket 1 are integrally formed. By using a molding process to integrally form the axle 2 and caster bracket 1, assembly gaps and weak points between them are eliminated, making the caster structure 100 a complete load-bearing unit. This allows for more efficient transmission and dispersion of equipment weight and various impact forces during movement. The integrally formed structure significantly enhances the overall rigidity and load-bearing capacity of the caster structure 100, avoiding loosening and displacement problems that may occur with traditional assembly connections. Simultaneously, it eliminates the assembly process between the axle 2 and caster bracket 1, simplifying the production process, reducing assembly errors, and improving product production efficiency and consistency. With the anti-roll wheel 3 detachment in the limiting part 211 and the structural stability, the one-piece molding design significantly improves the impact resistance and service life of the caster structure 100. Even under heavy load, high-frequency movement or bumpy conditions, it can prevent the wheel axle 2 from separating from the bracket and deforming, ensuring the stable operation of the caster structure 100. The improved reliability of the overall structure makes the caster structure 100 more suitable for fields with stringent safety and stability requirements, such as medical and industrial logistics.

[0023] Please see Figure 2 and Figure 3 In one embodiment, the caster structure 100 includes two bushings 5, each bushing 5 being fitted onto a connecting section 21 and located between the caster bracket 1 and a roller 3. The core function of the bushing 5 is to widen the distance between the two rollers 3 and provide stable support for the rollers 3. The bushing 5, fitted onto the connecting section 21 and located between the caster bracket 1 and the roller 3, directly increases the distance between the two rollers 3 through its own thickness, avoiding force concentration or displacement of the rollers 3 due to excessively narrow spacing. The widened distance between the rollers 3 allows the caster structure 100 to have a larger support span, reducing the risk of equipment center of gravity shift and making it more stable when pushed, especially suitable for larger or higher-center-of-gravity equipment; the bushing 5 also isolates the roller 3 from the caster bracket 1, reducing friction and wear between them, protecting the connection between the bracket and the roller 3, while the bushing 5 and the limiting part 211 simultaneously provide axial limiting for the roller 3, preventing the roller 3 from loosening and falling off after prolonged use. Based on the sturdy one-piece molding structure and the anti-detachment design of the limiting part 211, the widened spacing of the bushing 5 makes the caster structure 100 move more smoothly and reduces shaking and jamming under bumpy conditions. At the same time, the reduction of friction and wear extends the overall service life of the caster structure 100. Combined with the synergistic effect of various components, the caster structure 100 is more suitable for the stable movement needs of various scenarios such as home appliances and industrial logistics.

[0024] Please see Figure 1 and Figure 4In one embodiment, the caster structure 100 includes a mounting housing 6 with a mounting groove 61. The caster bracket 1 is accommodated within the mounting groove 61 and connected to the groove wall. The axle 2 passes through the two opposing groove walls of the mounting groove 61, and the connecting section 21 is exposed in the mounting housing 6. The core function of the mounting housing 6 is to provide protection and a stable mounting base for the caster bracket 1. The mounting groove 61 of the mounting housing 6 provides dedicated space for the caster bracket 1, enabling precise positioning and fixation of the bracket. The axle 2 passes through the opposite groove walls of the mounting groove 61, further enhancing the support stability of the axle 2, while exposing the connecting section 21 for installation of the roller 3. The mounting housing 6 effectively isolates external dust, impurities, and impacts, protecting internal components such as the caster bracket 1 and axle 2, and reducing wear. The cooperation between the mounting groove 61 and the caster bracket 1 and axle 2 restricts the displacement of each component, making the caster structure 100 more compact and the force transmission more even. Based on the sturdy one-piece molded structure and the anti-detachment limit part 211, the assembly shell 6 improves the impact resistance and protection performance of the caster structure 100 and extends its service life; at the same time, the standardized mounting groove 61 design facilitates the quick docking of the caster structure 100 with various mobile devices, improves assembly convenience, and is more suitable for the installation and use needs of multiple scenarios such as home appliances and industrial logistics.

[0025] Please see Figure 1 and Figure 4 In one embodiment, the mounting housing 6 has grooves 62 on opposite sides to accommodate the rollers 3, with a gap between the groove wall of the groove 62 and the rollers 3. The core function of the grooves 62 is to provide protection and movement space for the rollers 3. The grooves 62 on both sides of the mounting housing 6 are specifically designed to accommodate the rollers 3, preventing them from being completely exposed to external collisions, friction, or impurities. The gap between the groove wall of the groove 62 and the rollers 3 provides sufficient space for the rollers 3 to rotate, ensuring that rotation is not interfered with. The grooves 62 provide a wrap-around protection for the rollers 3, reducing the damage to the rollers 3 caused by dust, debris, and external impacts, and extending the service life of the rollers 3. The reserved gap prevents friction and jamming between the rollers 3 and the groove wall, ensuring smooth rotation of the rollers 3 and making the equipment easier and more stable to push. Based on the original structure's stability, anti-fall-off properties, and strong protection, the design of the grooves 62 and the gap makes the caster structure 100 more protective and smoother to rotate, allowing it to work stably even under complex working conditions.

[0026] To achieve quick and accurate assembly of the housing 6 and the caster bracket 1, please refer to... Figure 1 and Figure 4In one embodiment, a snap-fit ​​63 is formed on the side of the assembly housing 6 facing the caster bracket 1, and a slot 12 is formed on the caster bracket 1. The snap-fit ​​63 is engaged within the slot 12. The matching design of the snap-fit ​​63 and the slot 12 provides a convenient connection method, allowing for fixation without additional fasteners. Simultaneously, the snap-fit ​​limiting mechanism ensures accurate relative positioning between the assembly housing 6 and the caster bracket 1, preventing displacement during use. The snap-fit ​​structure simplifies the assembly process, allowing for quick assembly without complex tools, significantly improving production efficiency. Furthermore, the tight fit between the snap-fit ​​63 and the slot 12 enhances the stability of the connection, resisting vibration and impact during equipment movement and preventing loosening and separation. Building upon the existing robust structure, strong protection, and smooth rotation, the snap-fit ​​design makes the assembly and disassembly of the caster structure 100 more convenient, reducing production and maintenance costs. At the same time, the precise snap-fit ​​positioning ensures the coordinated operation of all components of the caster structure 100, ensuring smooth rotation and reliable limit of the roller 3, making the caster structure 100 more stable in various working conditions and adaptable to the installation and maintenance needs of more scenarios.

[0027] This utility model also proposes a mobile device, which includes the caster structure 100 in any of the above embodiments. The specific structure of the caster structure 100 is as described in the above embodiments. Since this mobile device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The mobile device can be a speaker, a household storage shelf, or a trolley, and there are no limitations on this. All mobile devices rely on the caster structure 100 for flexible movement. The caster structure 100 of this utility model, through its one-piece molding, limiting anti-fall-off design, and precise assembly, effectively solves the problems of easy loosening, short lifespan, and jamming in traditional caster structures 100, allowing the mobile device to operate stably even under heavy loads, high-frequency movement, or bumpy environments. Whether it is an instrument trolley that needs to be pushed smoothly in a medical setting, a frequently transferred turnover device in the industrial field, or a storage tool that needs to be moved flexibly in a household setting, the caster structure 100 can improve the user experience and reduce maintenance costs.

[0028] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A caster structure, characterized in that, include: Caster bracket; At least one axle is provided through the caster bracket, the axle having two connecting sections, the two connecting sections being exposed on opposite sides of the caster bracket, and a limiting portion being formed at the end of each connecting section away from the caster bracket; Two rollers, each of which is rotatably fitted onto a connecting section, and each roller is located between the caster bracket and a limiting part.

2. The caster structure as described in claim 1, characterized in that, Each roller has a bearing on its inner peripheral wall, and each bearing is sleeved on a connecting section. The limiting part abuts against the side wall of the bearing for limiting.

3. The caster structure as described in claim 1, characterized in that, The caster structure includes two axles, each axle is connected to the caster bracket, and each axle has a fixed section and a connecting section connected to each other, the fixed section being connected to the caster bracket.

4. The caster structure as described in claim 3, characterized in that, The caster bracket has two fixing slots, and each fixing section is accommodated in one of the fixing slots.

5. The caster structure as described in claim 3, characterized in that, Each of the aforementioned axles and the caster brackets are integrally formed.

6. The caster structure as described in any one of claims 1 to 5, characterized in that, The caster structure includes two bushings, each bushing being fitted onto a connecting section and located between the caster bracket and a roller.

7. The caster structure as described in any one of claims 1 to 5, characterized in that, The caster structure includes an assembly housing with a mounting groove, a caster bracket housed in the mounting groove and connected to the groove wall, an axle passing through two opposite groove walls, and a connecting section exposed in the assembly housing.

8. The caster structure as described in claim 7, characterized in that, The mounting housing has grooves on opposite sides for accommodating the rollers, and there is a gap between the groove wall and the rollers.

9. The caster structure as described in claim 7, characterized in that, The mounting housing has a buckle on the side facing the caster bracket, and the caster bracket has a slot, with the buckle engaging in the slot.

10. A mobile device, characterized in that, The caster structure includes any one of claims 1 to 9.

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