Tilt-angle trundle
By designing the contact surface and reduced diameter surface structure of the tilting caster, the problem of existing casters getting stuck on uneven surfaces has been solved, resulting in better obstacle crossing performance and anti-tipping ability, and improving user experience and durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI HONGYU LUGGAGE IND CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-01
AI Technical Summary
Existing casters are prone to getting stuck on sand, gravel, and other debris on uneven surfaces, causing them to jam during movement and resulting in a poor user experience.
Design an angled caster with an outer circumferential surface including a ground contact surface and a reduced diameter surface. The ground contact surface is located on the side of the reduced diameter surface away from the support. The reduced diameter surface gradually decreases along the direction of the wheel body towards the support to form a space to avoid obstruction by debris. The anti-rollover capability and obstacle crossing performance are improved by setting an included angle of 20°-50°.
It effectively avoids obstruction by debris, improves obstacle-crossing ability and anti-rollover performance, enhances stability, extends service life, and ensures smooth and durable movement.
Smart Images
Figure CN224184032U_ABST
Abstract
Description
An angled caster Technical Field
[0001] This application relates to the field of luggage caster technology, and in particular to an angled caster. Background Technology
[0002] As people's living standards and consumption levels continue to improve, all kinds of bags and luggage have emerged. Casters, as one of the accessories for bags and luggage, are usually connected to the bottom of the bags and luggage to reduce friction resistance when the bags and luggage are dragged on the ground, thus saving effort.
[0003] In related technologies, casters generally include a caster bracket that is connected to the bag and a wheel that is rotatably connected to the caster bracket.
[0004] The outer circumference of the aforementioned wheels is generally designed as a toroidal surface, which has a large contact area with the ground. However, it has the following technical defects: during movement, when encountering uneven road surfaces, such as gravel roads, the casters are easily stuck by sand and gravel, which can cause jamming during the movement of luggage and result in a poor user experience. Summary of the Invention
[0005] To improve obstacle-crossing performance, this application provides an angled caster.
[0006] The tilting caster provided in this application adopts the following technical solution:
[0007] An angle caster includes a mounting base, a bracket rotatably connected to the bottom of the mounting base, and a wheel body rotatably connected to the bracket. The wheel body is connected to the bracket via a pivot. The wheel body includes a support frame and a wheel skin connected to the outer periphery of the support frame. The outer periphery of the wheel skin includes a ground contact surface and a reduced diameter surface. The ground contact surface is located on the side of the reduced diameter surface away from the bracket because it is in contact with the ground. The diameter of the reduced diameter surface gradually decreases along the direction of the wheel body towards the bracket.
[0008] By adopting the above technical solution, the reduced diameter surface creates a space between the wheel's ground contact point and the bracket, preventing the caster from being blocked by debris during movement and effectively reducing the probability of cables or carpets getting caught in the axle, thus significantly improving obstacle-crossing ability. Furthermore, when the caster is under load, the reduced diameter surface naturally causes the wheel's contact surface to tilt outwards, forming a stable structure and effectively enhancing its resistance to lateral impacts.
[0009] Optionally, the angle between the reduced diameter surface and the central axis of the wheel skin is α, and the range of α is 20°-50°.
[0010] By adopting the above technical solutions, the 20°-50° angle allows the caster to effectively cope with most scenarios. This angle range combines performance and practicality. The angle setting causes the wheel's ground center to shift outward, thereby forming an anti-rollover lever arm and effectively improving lateral stability. A smaller angle can effectively improve steering performance, and the angle can be adjusted according to different usage scenarios.
[0011] Optionally, the range of α is 40°-45°.
[0012] By adopting the above technical solutions, setting the tilt angle within this range can effectively improve service life and anti-rollover performance, while also effectively ensuring obstacle crossing ability. Within this range, it has better performance, achieving a balance between service life and performance, thereby effectively improving the overall performance of the caster.
[0013] Optionally, the side of the wheel skin closest to the bracket is a first plane, and the side of the wheel skin furthest from the bracket is a second plane. An arc-shaped surface connects the first plane and the reduced-diameter surface, and the second plane is connected to the ground surface.
[0014] By adopting the above technical solutions, the curved surface can effectively reduce stress concentration during use, disperse stress, thereby effectively reducing wear, increasing service life, and ensuring the durability of the casters.
[0015] Optionally, the grounding surface includes a grounding ring and buffer surfaces connected to opposite sides of the grounding ring, wherein the buffer surfaces on both sides are respectively connected to the first plane and the reduced diameter surface.
[0016] By adopting the above technical solution, the grounding ring can effectively provide better friction when the caster is rolling, ensuring stable movement of the caster on smooth ground and preventing slippage; in addition, the grounding ring has a large force-bearing area, which can effectively withstand greater pressure and improve durability.
[0017] Optionally, the ground plane is arc-shaped and its opposite sides are connected to the first plane and the reduced diameter surface, respectively.
[0018] By adopting the above technical solution, the arc-shaped contact surface makes the caster's steering smoother. When a change of direction is needed, the caster can be adjusted more easily because the arc surface naturally guides the caster's steering, reducing friction and resistance during steering; furthermore, the arc-shaped contact surface can better conform to different types of ground, and the arc surface can make slight adjustments with the undulations of the ground, ensuring that the caster always maintains good contact with the ground, thereby ensuring smooth and stable movement.
[0019] Optionally, the support frame includes a wheel core, spokes fixedly connected to the outer periphery of the wheel core, and a support portion fixedly connected to the spokes. The side of the support portion near the bracket is an inclined surface, and the inclined surface is parallel to the reduced diameter surface.
[0020] By adopting the above technical solution, the support frame effectively supports the wheel skin. When the reduced diameter surface comes into contact with an obstacle, the inclined surface of the support frame can effectively support the reduced diameter surface, thereby ensuring the obstacle-crossing effect of the caster and improving the stability of use.
[0021] Optionally, the support portion has a through hole for filling the wheel skin.
[0022] By adopting the above technical solution, the through hole allows the wheel skin to be effectively engaged inside the through hole and connected to the inner wall of the through hole, effectively preventing the wheel skin from falling off and improving the stability of the caster during use.
[0023] Optionally, the support frame is connected to the rotating shaft via a mechanical bearing.
[0024] By adopting the above technical solution, the rotation of the wheel body can be effectively reduced by using mechanical bearings, thereby effectively improving the rotation performance of the wheel body and facilitating movement.
[0025] Optionally, a cover is inserted into the side of the support frame away from the bracket, and the cover is positioned opposite the mechanical bearing.
[0026] By adopting the above technical solution, the dust cover can effectively prevent external dust, fibers, etc. from getting into the bearing and causing a decline in bearing performance, thereby effectively ensuring the rotation performance of the caster and improving stability during use.
[0027] In summary, this application has the following beneficial effects:
[0028] 1. By setting a reduced diameter surface, a space is formed between the grounding point of the caster and the bracket, so that the caster will not be blocked by debris during movement, thus improving obstacle crossing performance; and the grounding point of the wheel can be moved outward to form an anti-rollover lever arm, improving the lateral stability of the wheel.
[0029] 2. By setting up a support frame and an inclined surface, the casters can be effectively supported during rolling. During obstacle crossing, the inclined surface can provide effective support for the narrowed diameter surface, thus ensuring the obstacle crossing effect. Attached Figure Description
[0030] Figure 1 is a structural schematic diagram of the tilt caster of Embodiment 1 of this application;
[0031] Figure 2 is an exploded view of the tilt caster of Embodiment 1 of this application;
[0032] Figure 3 is a schematic diagram of the supporting skeleton of Embodiment 1 of this application;
[0033] Figure 4 is a front view of the angled caster of Embodiment 1 of this application after removing one side of the wheel skin.
[0034] Figure 5 is a cross-sectional view of the tilt caster of Embodiment 1 of this application.
[0035] Figure 6 is a front view of the wheel body of Embodiment 2 of this application.
[0036] Explanation of reference numerals in the attached drawings: 1. Mounting base; 2. Bracket; 21. Shaft; 3. Wheel body; 31. Support frame; 311. Wheel core; 312. Spoke; 313. Support part; 3131. Inclined surface; 3132. Through hole; 314. Cover; 32. Wheel skin; 321. Grounding surface; 3211. Grounding ring; 3212. Buffer surface; 322. Reduced diameter surface; 323. First plane; 324. Second plane; 325. Arc-shaped surface; 4. Mechanical bearing. Detailed Implementation
[0037] The present application will be further described in detail below with reference to Figures 1-6.
[0038] Embodiment 1 of this application discloses an angled caster. Referring to Figures 1 and 2, the angled caster includes a mounting base 1 for fixed connection with a bag, a bracket 2 rotatably connected to the bottom of the mounting base 1, and two wheel bodies 3 rotatably connected to the bracket 2. The wheel bodies 3 are connected to the bracket 2 via a pivot 21. When using the caster, the mounting base 1 can be effectively fixed to the bottom of the bag. The rotatable connection between the bracket 2 and the mounting base 1 enables the caster to move in all directions, and the rotation of the wheel bodies 3 drives the bag to move.
[0039] Referring to Figures 2, 3, and 4, the wheel body 3 includes a support frame 31 and a wheel skin 32 fixedly connected to the outer periphery of the support frame 31. The outer periphery of the wheel skin 32 includes a ground contact surface 321 and a reduced diameter surface 322. The ground contact surface 321 is located on the side of the reduced diameter surface 322 away from the support 2. The support 2 of the reduced diameter surface 322 gradually decreases in size along the direction of the wheel body 3 towards the support 2. The reduced diameter surface 322 allows the bottom of the caster support 2 to form an obstacle-crossing space. When an obstacle appears at the bottom of the caster, the reduced diameter surface 322 can effectively guide the caster to climb up along the surface of the obstacle, thereby effectively crossing the obstacle and improving obstacle-crossing performance. Furthermore, since the ground contact surface 321 is located on the side of the reduced diameter surface 322 away from the support 2, when the wheel body 3 touches the ground, the ground contact surface 321 naturally tends to tilt outward, thereby forming a stable structure and effectively enhancing the ability to resist lateral impacts.
[0040] Referring to Figures 2, 3, and 4, the angle between the reduced-diameter surface 322 and the central axis of the wheel skin 32 is α, ranging from 20° to 50°. This angle causes the ground contact center of the wheel 3 to shift outward, thus forming an anti-rollover lever arm and effectively improving lateral stability. An angle of 20° to 50° balances performance and practicality, preventing instability due to an excessively large angle and insufficient obstacle-crossing performance due to an excessively small angle, effectively ensuring the overall performance of the caster.
[0041] To better adapt to most scenarios, the included angle α is set to a range of 40°-45°. This range effectively adapts to various road surfaces and achieves an effective balance between rollover resistance, durability, and obstacle-crossing performance, making it a more cost-effective included angle range.
[0042] In this embodiment, the included angle α is set to 45°. Compared with other angles, the included angle of 45° can achieve a balance between the durability, obstacle crossing ability and steering ability of the caster, thereby effectively improving the overall performance of the caster.
[0043] Referring to Figures 4 and 5, the side of the wheel skin 32 closest to the bracket 2 is the first plane 323, and the side of the wheel skin 32 furthest from the bracket 2 is the second plane 324. An arc-shaped surface 325 connects the first plane 323 and the reduced-diameter surface 322. The second plane 324 connects to the ground contact surface 321. Both the second plane 324 and the first plane 323 are vertically oriented. Compared to a right-angled edge, the arc-shaped surface 325 effectively eliminates stress concentration, thereby reducing wear during use, increasing service life, and ensuring durability.
[0044] Referring to Figures 4 and 5, the ground plane 321 includes a grounding ring 3211 and buffer surfaces 3212 connected to opposite sides of the grounding ring 3211. The side of the grounding ring 3211 that contacts the ground is a plane, and the buffer surface 3212 is arc-shaped. The buffer surfaces 3212 on both sides are connected to the first plane 323 and the reduced diameter surface 322, respectively.
[0045] When the caster rolls, the grounding ring 3211 has a large contact area with the ground, which can provide better friction. On smooth surfaces, it can ensure the stable movement of the caster and prevent slippage, thus ensuring the stability of the caster. Due to the large contact area of the grounding ring 3211, it can bear more pressure per unit area. The flat grounding ring 3211 can better distribute the weight, improve the load-bearing capacity, and thus achieve a better support effect.
[0046] Referring to Figures 3, 4, and 5, the support frame 31 includes a wheel core 311, spokes 312 fixedly connected to the outer periphery of the wheel core 311, and a support portion 313 fixedly connected to the spokes 312. The side of the support portion 313 near the bracket 2 is an inclined surface 3131, which is parallel to the reduced diameter surface 322. During the rotation of the caster, the support frame 31 provides effective support, ensuring that the caster can roll normally. The inclined surface 3131 being parallel to the reduced diameter surface 322 provides effective support for the caster during obstacle crossing, thus ensuring the obstacle crossing performance of the caster.
[0047] Referring to Figures 3, 4, and 5, the support portion 313 has a through hole 3132 for filling the wheel skin 32. The through hole 3132 allows the wheel skin 32 to effectively engage with the wheel body 3, effectively preventing the wheel skin 32 from falling off and improving the stability of use.
[0048] Referring to Figure 5, the support frame 31 and the rotating shaft 21 are connected by a mechanical bearing 4. The mechanical bearing 4 is located inside the wheel core 311. A cover 314 is inserted into the side of the support frame 31 away from the bracket 2, and the cover 314 is directly opposite the mechanical bearing 4. The mechanical bearing 4 can effectively reduce the rotational resistance when the wheel 3 rotates, thereby effectively improving the rotational performance of the wheel 3. The dust cover can effectively prevent dust, fibers and other debris from entering the mechanical bearing 4 and causing damage to the bearing, thus effectively improving the stability of use.
[0049] The implementation principle of an angled caster in Embodiment 1 of this application is as follows: when the caster is rolling and an obstacle appears on the ground, the reduced diameter surface 322 of the wheel skin 32 can effectively provide friction. The reduced diameter surface 322 contacts the obstacle, causing the wheel body 3 to rise along the surface of the obstacle, thereby effectively overcoming the obstacle.
[0050] Embodiment 2 of this application discloses an angled caster.
[0051] The difference between Embodiment 2 and Embodiment 1 lies only in the structure of the ground plane 321. Referring to Figure 6, the ground plane 321 is arc-shaped, and its opposite sides are directly connected to the first plane 323 and the reduced-diameter surface 322, respectively. The arc-shaped ground plane 321 makes the caster steering smoother, and the arc surface can naturally guide the caster's steering, reducing friction and resistance during steering and effectively improving steering performance.
[0052] The implementation principle of an angled caster in Embodiment 2 of this application is as follows: When the caster is rolling and an obstacle appears on the ground, the reduced diameter surface 322 of the wheel skin 32 can effectively provide friction. The reduced diameter surface 322 contacts the obstacle, causing the wheel body 3 to rise along the surface of the obstacle, thereby effectively overcoming the obstacle. The arc-shaped contact surface 321 makes the caster's steering smoother and improves its steering ability.
[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A tilting caster, comprising a mounting base (1), a bracket (2) rotatably connected to the bottom of the mounting base (1), and a wheel body (3) rotatably connected to the bracket (2), wherein the wheel body (3) is connected to the bracket (2) via a pivot (21), characterized in that: The wheel body (3) includes a support frame (31) and a wheel skin (32) connected to the outer periphery of the support frame (31). The outer periphery of the wheel skin (32) includes a ground contact surface (321) and a reduced diameter surface (322). The ground contact surface (321) is used to contact the ground. The ground contact surface (321) is located on the side of the reduced diameter surface (322) away from the bracket (2). The diameter of the reduced diameter surface (322) gradually decreases along the direction of the wheel body (3) closer to the bracket (2).
2. The tilting caster according to claim 1, characterized in that: The included angle between the reduced diameter surface (322) and the central axis of the wheel skin (32) is α, and the range of α is 20°-50°.
3. The tilt wheel of claim 2, wherein: The range of α is 40°-45°.
4. The tilting caster according to claim 1, characterized in that: The side of the wheel skin (32) closest to the bracket (2) is a first plane (323), and the side of the wheel skin (32) furthest from the bracket (2) is a second plane (324). An arc-shaped surface (325) connects the first plane (323) and the reduced diameter surface (322), and the second plane (324) is connected to the ground surface (321).
5. The tilting caster according to claim 4, characterized in that: The grounding surface (321) includes a grounding ring (3211) and buffer surfaces (3212) connected to opposite sides of the grounding ring (3211). The buffer surfaces (3212) on both sides are connected to the first plane (323) and the reduced diameter surface (322), respectively.
6. The tilting caster according to claim 4, characterized in that: The ground surface (321) is arc-shaped and its opposite sides are connected to the first plane (323) and the reduced diameter surface (322) respectively.
7. The tilting caster according to claim 1, characterized in that: The support frame (31) includes a wheel core (311), spokes (312) fixedly connected to the outer periphery of the wheel core (311), and a support part (313) fixedly connected to the spokes (312). The side of the support part (313) near the bracket (2) is an inclined surface (3131), and the inclined surface (3131) is parallel to the reduced diameter surface (322).
8. The tilting caster according to claim 7, characterized in that: The support (313) has a through hole (3132) for filling the wheel skin (32).
9. The tilting caster according to claim 1, characterized in that: The support frame (31) is connected to the rotating shaft (21) by a mechanical bearing (4).
10. The tilting caster according to claim 9, characterized in that: The support frame (31) has a cover (314) inserted on the side away from the bracket (2), and the cover (314) is directly opposite the mechanical bearing (4).