Luggage case trundle convenient to replace
By designing protective and removable mechanisms on the suitcase casters, the problem of casters being easily damaged during transport is solved, enabling caster protection and convenient replacement, thus improving the stability of the suitcase and the user experience.
Patent Information
- Application Number
- CN202520715667.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-16
AI Technical Summary
Suitcase wheels are easily damaged by impacts during transport, causing inconvenience to travelers.
An easy-to-replace suitcase caster has been designed, which includes a protective mechanism and a disassembly mechanism. The protective mechanism protects the caster with a limit bar and a fixing plate, while the disassembly mechanism facilitates caster replacement with a mounting sleeve and a locking block.
It effectively prevents caster damage, reduces replacement difficulty, improves the stability and safety of the suitcase, enhances user experience, and reduces maintenance costs.
Smart Images

Figure CN223958427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of luggage, and more particularly to a luggage caster that is easy to replace. Background Technology
[0002] As an important tool for people to travel, the design of suitcases is constantly being optimized to meet people's growing travel needs. For example, the addition of pull rods and wheels greatly improves the portability of suitcases, and the design of internal compartments makes luggage more organized.
[0003] However, when luggage is checked in, the wheels of the luggage are exposed. Therefore, when the luggage is transported by the conveyor belt and falls onto other conveyor belts, the wheels are more likely to be impacted and damaged, which inconveniences travelers.
[0004] To address the aforementioned problems, this utility model document proposes an easily replaceable suitcase caster. Utility Model Content
[0005] This invention provides an easily replaceable suitcase caster, solving the problem that in the prior art, when a suitcase is checked in, the casters are exposed and are easily damaged when the suitcase falls onto other conveyor belts, causing inconvenience to travelers.
[0006] This utility model provides the following technical solution:
[0007] A replaceable suitcase caster includes a suitcase body, wherein a plurality of fixing blocks are fixedly connected to the bottom of the suitcase body, and a rotating rod is rotatably connected to one side of each of the plurality of fixing blocks;
[0008] The protective mechanism for the casters of the suitcase is located at the bottom of the suitcase and is used to protect the casters when protection is needed.
[0009] The disassembly mechanism for replacing the suitcase casters is located at the bottom of the suitcase body, making it easy to replace the casters when they are worn out.
[0010] In one possible design, the protective mechanism includes a limiting block, a limiting hole, a folding hole, and a limiting rod. The two limiting blocks are fixedly connected to the other ends of multiple rotating rods on both sides. The two limiting holes are respectively opened inside the two limiting blocks. The two folding holes are respectively opened inside the two limiting blocks. One end of the limiting rod passes through the interior of the two limiting holes and extends to the exterior of one of the limiting holes. Multiple connecting rods are welded to the outer walls of the multiple rotating rods. The multiple connecting rods are evenly divided into multiple groups. The other end of each group of connecting rods is welded with a fixing plate.
[0011] In one possible design, a handle is welded to one end of the limiting rod, and a knob is threaded to the other end of the limiting rod to lock the limiting rod and prevent it from loosening.
[0012] In one possible design, the disassembly mechanism includes mounting cylinders, elastic frames, and locking blocks. Each mounting cylinder has a fixing hole inside, and the inner walls of the fixing holes are welded to the outer walls of multiple rotating rods. Each mounting cylinder has a mounting groove at its bottom. The tops of the elastic frames are inserted into the interiors of the mounting grooves. One side of each locking block is welded to one side of the elastic frames. Each mounting groove has a locking slot inside, and the locking blocks are respectively disposed within the locking slots.
[0013] In one possible design, each of the mounting cylinders has a sliding groove on its outer wall, and the sliding grooves are interconnected with each of the slots. Each of the sliding grooves has a sliding rod slidably connected inside, and one end of each sliding rod is fixedly connected to a stop block. Each stop block is slidably connected inside the slots, and one side of each stop block is abutted against one side of each slot block. The other end of each sliding rod is fixedly connected to a pressing block.
[0014] In one possible design, rubber blocks are fixedly connected to one side of each of the multiple fixing plates to reduce impact on the suitcase.
[0015] In one possible design, the bottom of each of the elastic frames is fixedly connected with casters.
[0016] In this application, when the user needs to secure the suitcase casters to prevent damage during transport, the protective mechanism can be used. To use it, hold the handle at one end of the limiting rod, unscrew the knob at the other end, and then pull it out of the limiting holes inside the two limiting blocks. At this point, the direction of the multiple casters can be adjusted using multiple rotating rods, while simultaneously ensuring that the multiple fixing plates and rubber blocks face downwards. Then, pass the limiting rod through the folding holes inside the two limiting blocks until one end of the limiting rod extends outside one of the folding holes. Finally, rotate the knob at the other end of the limiting rod. This ensures the wheel is tightly fitted to one of the limiting blocks, preventing the limiting rod from loosening and thus avoiding damage to the suitcase casters during check-in. Similarly, to reset the casters, insert the limiting rod back into the two limiting holes and tighten the knob to reset the casters, allowing the suitcase to be used normally. When the casters are worn or damaged and need to be replaced, the disassembly mechanism can be used. To use it, hold the two handles at one end of the two sliding rods and simultaneously press the sliding rods inward to push the stop block out of the slot. Then, pull the caster and its welded elastic frame downward.
[0017] In this utility model, the replaceable suitcase caster, through a protective mechanism, can achieve the effect of protecting the suitcase caster, thereby avoiding damage to the caster;
[0018] In this utility model, the easily replaceable suitcase caster, through a disassembly mechanism, allows for convenient and quick disassembly and replacement of the caster, thereby further reducing the difficulty of replacing the caster;
[0019] In this invention, the protective mechanism enhances the stability and safety of the suitcase and improves the user experience, while the disassembly mechanism makes the replacement of the casters more convenient and efficient, reducing maintenance costs and time. The combined effect of these two mechanisms makes the suitcase more stable, durable and convenient during use, meeting users' needs for high-quality suitcases. Attached Figure Description
[0020] Figure 1 One of the main view structural schematic diagrams of an easily replaceable suitcase caster provided in an embodiment of this utility model;
[0021] Figure 2 A second schematic diagram of the main view structure of a replaceable suitcase caster provided for an embodiment of this utility model;
[0022] Figure 3 An enlarged structural diagram of a protective mechanism for easily replaceable suitcase casters provided in an embodiment of this utility model;
[0023] Figure 4 This is a partial enlarged cross-sectional view of a disassembly mechanism for easily replaceable suitcase casters provided in an embodiment of the present invention.
[0024] Figure label:
[0025] 1. Box body; 2. Fixing block; 3. Rotating rod; 4. Limiting block; 5. Limiting hole; 6. Folding hole; 7. Limiting rod; 8. Handle; 9. Knob; 10. Connecting rod; 11. Fixing plate; 12. Rubber block; 13. Mounting cylinder; 14. Elastic frame; 15. Casters; 16. Locking block; 17. Abutment block; 18. Slide rod; 19. Pressing block. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1
[0027] When luggage is checked in, the wheels are exposed, so they are easily damaged when the luggage is transported by the conveyor belt and falls onto other conveyor belts, causing inconvenience to travelers. This solution is to design an easy-to-replace luggage wheel.
[0028] Please refer to Figures 1-4 A suitcase caster includes: a suitcase body 1, with multiple fixing blocks 2 fixedly connected to the bottom of the suitcase body 1, and a rotating rod 3 rotatably connected to one side of each fixing block 2, thereby providing a basis for the folding and resetting of the caster.
[0029] The protective mechanism for protecting the casters of the suitcase is located at the bottom of the suitcase body 1. It provides protection when the casters require it. The mechanism includes limiting blocks 4, limiting holes 5, folding holes 6, and limiting rods 7. The two limiting blocks 4 are fixedly connected to the other ends of multiple rotating rods 3 on both sides. Two limiting holes 5 and two folding holes 6 are respectively opened inside the two limiting blocks 4. One end of the limiting rod 7 passes through the interior of two limiting holes 5 and extends to the exterior of one of the limiting holes 5. Multiple connecting rods 10 are welded to the outer walls of the multiple rotating rods 3. The multiple connecting rods 10 are evenly divided into multiple groups, and a fixing plate 11 is welded to the other end of each group of connecting rods 10. When the user needs to secure the rods... To prevent damage to luggage casters during baggage check-in, a protective mechanism can be used. To use it, hold the handle 8 at one end of the limiting rod 7, unscrew the knob 9 at the other end of the limiting rod 7, and then pull it out of the limiting holes 5 inside the two limiting blocks 4. At this point, the direction of the multiple casters 15 can be adjusted using multiple rotating rods 3, while simultaneously ensuring that the multiple fixing plates 11 and rubber blocks 12 face downwards. Then, pass the limiting rod 7 through the folding holes 6 inside the two limiting blocks 4 until one end of the limiting rod 7 extends to the outside of one of the folding holes 6. Then, rotate the knob 9 at the other end of the limiting rod 7 to ensure it fits tightly against one of the limiting blocks 4, ensuring that the limiting rod 7 will not loosen, thus preventing damage to the luggage casters during baggage check-in.
[0030] A handle 8 is welded to one end of the limit rod 7, and a knob 9 is threaded to the other end of the limit rod 7 to lock the limit rod 7 and prevent it from loosening. Thus, when the caster 15 is reset, the limit rod 7 can be inserted back into the two limit holes 5, and then the knob 9 can be tightened to complete the reset of the caster and make the suitcase usable normally.
[0031] The disassembly mechanism for replacing the casters in the luggage compartment is located at the bottom of the compartment 1. It facilitates replacement when the casters are worn and need to be replaced. The disassembly mechanism includes mounting cylinders 13, elastic brackets 14, and locking blocks 16. Each mounting cylinder 13 has internal fixing holes, the inner walls of which are welded to the outer walls of multiple rotating rods 3. Each mounting cylinder 13 has a mounting groove at its bottom. The tops of the multiple elastic brackets 14 are inserted into the mounting grooves. One side of each locking block 16 is welded to one side of the multiple elastic brackets 14. Each mounting groove has a locking slot, and the locking blocks 16 are respectively positioned inside the locking slots. The outer walls of the multiple mounting cylinders 13 are... The system has sliding grooves, which are interconnected with multiple slots. Each sliding groove has a sliding rod 18 slidably connected inside. One end of each sliding rod 18 is fixedly connected to a stop block 17. Each stop block 17 is slidably connected inside the slots, and one side of each stop block 17 is attached to one side of each slot block 16. The other end of each sliding rod 18 is fixedly connected to a pressing block 19. Thus, when the caster is worn or damaged and needs to be replaced, the disassembly mechanism can be used. In use, hold the two handles 8 at one end of the two sliding rods 18 and simultaneously press the sliding rods 18 inward to push the stop block 17 out of the slot and push the slot block 16 out. Then, pull the caster 15 and the elastic frame 14 welded on it downward.
[0032] This application can be used in the field of luggage, or in other fields applicable to this application. Example 2
[0033] Based on Example 1, the following improvements were made:
[0034] An easily replaceable suitcase caster, which is applied to the suitcase industry, including:
[0035] Rubber blocks 12 are fixedly connected to one side of each of the multiple fixing plates 11 to reduce the impact on the suitcase, thereby further enhancing the protection of the suitcase.
[0036] The bottom of each of the multiple flexible racks 14 is fixedly connected to casters 15, which allows users to use the suitcase conveniently and effortlessly.
[0037] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.
[0038] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A replaceable luggage caster, comprising: Include: The bottom of the box (1) is fixedly connected with a plurality of fixed blocks (2), and one side of each of the plurality of fixed blocks (2) is rotatably connected with a rotating rod (3); The protection mechanism is arranged on the bottom of the box (1), and is used for protection when the trolley needs protection; The dismounting mechanism is arranged on the bottom of the box (1), and is used for replacing the trolley when the trolley is worn out.
2. A replaceable luggage caster according to claim 1, wherein, The protection mechanism includes limiting blocks (4), limiting holes (5), folding holes (6) and limiting rods (7), two sides of the two limiting blocks (4) are fixedly connected to the other end of the plurality of rotating rods (3), two limiting holes (5) are respectively arranged in the two limiting blocks (4), two folding holes (6) are respectively arranged in the two limiting blocks (4), one end of the limiting rod (7) passes through the inside of the two limiting holes (5) and extends to the outside of one of the limiting holes (5), a plurality of connecting rods (10) are welded on the outer wall of the plurality of rotating rods (3), the plurality of connecting rods (10) are evenly divided into a plurality of groups, and the other end of each group of connecting rods (10) is welded with a fixed plate (11).
3. A replaceable luggage caster according to claim 2, wherein, One end of the limiting rod (7) is welded with a handle (8), and the other end of the limiting rod (7) is threadedly connected with a knob (9) for locking the limiting rod (7) to prevent loosening.
4. A replaceable luggage caster according to claim 1, wherein, The dismounting mechanism includes a mounting cylinder (13), an elastic frame (14) and a clamping block (16), a plurality of fixed holes are formed in the inside of the plurality of mounting cylinders (13), the inner walls of the plurality of fixed holes are respectively welded on the outer walls of the plurality of rotating rods (3), a plurality of mounting grooves are formed in the bottoms of the plurality of mounting cylinders (13), the tops of a plurality of elastic frames (14) are respectively inserted into the plurality of mounting grooves, one side of a plurality of clamping blocks (16) is respectively welded on one side of a plurality of elastic frames (14), a plurality of clamping grooves are formed in the plurality of mounting grooves, and a plurality of clamping blocks (16) are respectively arranged in the plurality of clamping grooves.
5. A replaceable luggage caster according to claim 4, wherein, A plurality of sliding grooves are formed in the outer walls of the plurality of mounting cylinders (13), a plurality of sliding grooves are respectively communicated with a plurality of clamping grooves, a plurality of sliding rods (18) are slidably connected in the plurality of sliding grooves, one end of each of the plurality of sliding rods (18) is fixedly connected with a stop block (17), the plurality of stop blocks (17) are respectively slidably connected in the plurality of clamping grooves, one side of each of the plurality of stop blocks (17) is respectively attached to one side of a plurality of clamping blocks (16), and the other end of each of the plurality of sliding rods (18) is fixedly connected with a pressing block (19).
6. A replaceable luggage caster according to claim 2, wherein, One side of each of the plurality of fixed plates (11) is fixedly connected with a rubber block (12) for reducing the impact on the luggage.
7. A replaceable luggage caster according to claim 4, wherein, The bottoms of the plurality of elastic frames (14) are fixedly connected with universal wheels (15).