Quick-release luggage trolley

Abstract

The application relates to a luggage technology field, in particular to a quick-release luggage trolley, which comprises a pull rod, a base, a connecting frame body, a locking assembly and a trundle, the connecting frame body comprises two front connecting pieces and a bearing rod, a rotating groove is integrally formed in the top side wall of the front connecting piece, one end of the bearing rod is rotationally connected in the rotating groove, the pull rod comprises a handle and a pair of telescopic rod bodies, the telescopic rod bodies are arranged on the top of the front connecting piece, the base is fixed on the bearing rod, the trundle is detachably connected with the front connecting piece through the locking assembly, a user shortens the telescopic rod bodies by pressing the handle, the base can rotate with the bearing rod with the front connecting piece as the center until abutting against the contracted pull rod, the trundle is quickly fastened with the front connecting piece and separated from the front connecting piece through the locking assembly, the occupied space of the device in the storage state is effectively reduced, and the application has the characteristics of improving the storage convenience.

Description

Technical Field

[0001] This application relates to the field of luggage technology, and in particular to a quick-release luggage trolley. Background Technology

[0002] As a portable means of transportation, luggage carts are commonly used for luggage consignment or other transportation scenarios. They move by supporting objects on a base and using casters, which greatly reduces the physical exertion and time cost of manual handling.

[0003] In related technologies, the following two solutions are usually adopted to solve the problem of luggage cart storage: one is to use a telescopic pull rod design, which reduces the space occupied by adjusting the length of the pull rod; the other is to use a folding base, which can be rotated and folded to reduce the overall volume.

[0004] Existing luggage carts have the following problems: their casters are mostly fixed, and after other parts of the luggage cart are stored, the casters still occupy a large amount of external space, which cannot meet the needs of efficient storage. As people's requirements for portability and storage efficiency increase, the design of traditional luggage carts has gradually shown its limitations. Utility Model Content

[0005] To facilitate storage, this application provides a quick-release luggage trolley.

[0006] The quick-release luggage trolley provided in this application adopts the following technical solution: A quick-release luggage trolley includes a pull rod, a base, a connecting frame, a locking assembly, and casters. The connecting frame includes two front connectors and a support rod. The top sidewall of each front connector has an integrally formed rotating groove. One end of the support rod is rotatably connected to the rotating groove. The pull rod includes a handle and a pair of telescopic rods. The telescopic rods are disposed on the top of the front connectors. The base is fixed to the support rod. The casters are detachably connected to the front connectors via the locking assembly.

[0007] By adopting the above technical solution, the user can press the handle to shorten the telescopic rod. The base can rotate with the front connector as the center until it is close to the retracted rod. The casters use locking components to quickly fasten and separate from the front connector, effectively reducing the space occupied by the device in the storage state and improving storage convenience.

[0008] Preferably, the locking assembly includes a fastening bolt and a fastening nut, the side wall of the front connector is provided with a mounting hole, the body of the fastening bolt is placed in the mounting hole, and the head of the fastening bolt extends out of the caster and is threadedly engaged with the fastening nut.

[0009] By adopting the above technical solution, users can lock and release the casters by rotating the fastening nut without the need for additional tools, thus improving operational efficiency.

[0010] Preferably, the fastening nut is a star-shaped nut, and the fastening bolt is a hexagonal head bolt adapted to the fastening nut.

[0011] By adopting the above technical solution, the risk of fasteners becoming loose is reduced, and the hexagonal structure also makes it easier for people to apply force by hand or tools.

[0012] Preferably, the connecting frame further includes two rear connecting parts rotatably connected to the other end of the bearing rod. The front connecting part and the rear connecting part are fixedly connected by a connecting rod and form a triangular structure with the bearing rod. The two ends of the connecting rod respectively engage with the shaft holes of the front connecting part and the rear connecting part.

[0013] By adopting the above technical solution, the load-bearing capacity of the bearing rod is improved, and the connecting rod achieves rotational following of the bearing rod through the engagement of the shaft holes at both ends.

[0014] Preferably, the base has a hollowed-out bottom and covers the support rod, the top of each of the two rear connectors has a clearance groove adapted to the support rod, the bottom of the rear connector has a support rod that abuts against the ground at an angle, and a first reinforcement member is arranged laterally between the two support rods.

[0015] By adopting the above technical solution, the positioning accuracy and torsional rigidity are improved, and the support rod can rotate with the rear connector until it is in close contact with the bearing rod.

[0016] Preferably, a second reinforcing member is provided laterally between the two telescopic rods and between the two front connectors, and the base is in clearance fit with the second reinforcing member on the front connector.

[0017] By adopting the above technical solutions, the risk of lateral deformation of the telescopic rod and the front connector is reduced, and mechanical interference is reduced when the base rotates with the load-bearing rod.

[0018] Preferably, the upper surface of the base is provided with horizontal or cross-shaped anti-slip textures.

[0019] By adopting the above technical solution, the transportation stability of the device under dynamic load is improved by increasing the friction coefficient of the contact surface.

[0020] Preferably, the tops of the two front connectors are provided with insertion slots, and the groove walls are provided with limiting blocks extending inward in the circumferential direction. The telescopic rod is inserted into the insertion slots and there is an interference fit between it and the limiting blocks.

[0021] By adopting the above technical solution, radial constraint is used to reduce the axial slippage of the telescopic rod in the insertion slot, thus ensuring connection stability.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Users can compress the telescopic rod by pressing the handle. The base can rotate with the front connector as the center until it is close to the retracted rod. The casters use locking components to quickly fasten and separate from the front connector, effectively reducing the space occupied by the device in the storage state and improving storage convenience. 2. Improved the operating efficiency and reliability of the device; 3. Improved the load capacity and stability of the device under dynamic operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the overall structure of the connecting frame in the embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Pull rod; 11. Handle; 12. Telescopic rod; 13. Second reinforcement component; 2. Base; 21. Anti-slip texture; 3. Caster; 4. Locking assembly; 41. Fastening bolt; 42. Fastening nut; 5. Connecting frame; 51. Front connector; 511. Insertion slot; 512. Limiting block; 513. Rotation slot; 514. Mounting hole; 52. Rear connector; 521. Alternating groove; 53. Bearing rod; 54. Support rod; 55. First reinforcement component; 56. Connecting rod. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0027] This application discloses a quick-release luggage trolley. (Refer to...) Figure 1-2 A quick-release luggage trolley includes a pull rod 1, a base 2, a connecting frame 5, a locking assembly 4, and casters 3. The connecting frame 5 includes two front connectors 51 and a support rod 53. The top side wall of the front connector 51 is integrally formed with a rotating groove 513. One end of the support rod 53 is rotatably connected to the rotating groove 513. The pull rod 1 includes a handle 11 and a pair of telescopic rods 12. The telescopic rods 12 are installed on the top of the front connectors 51. The base 2 is fixed to the support rod 53. The casters 3 are detachably connected to the front connectors 51 through the locking assembly 4.

[0028] Therefore, the load-bearing rod 53 and the base 2 form a rigid support structure to support heavy objects. The telescopic rod 12 of the pull rod 1 is height-adjustable to adapt to users of different heights or transportation scenarios. The two front connectors 51 form a rotatable connection point, allowing the load-bearing rod 53 to swing within a certain angle range to achieve rotation and storage. The side wall layout of the wheels and locking components 4 optimizes the center of gravity distribution and reduces the risk of tipping over when the vehicle is pushed.

[0029] Correspondingly, the quick-release luggage cart achieves efficient loading and unloading and flexible use through modular design. Users can press the handle 11 to drive the telescopic rod 12 to compress axially, thereby reducing its length. The base 2 can rotate with the support rod 53 around the front connector 51 until it is close to the retracted pull rod 1. The casters 3 use the locking assembly 4 to quickly fasten and separate from the front connector 51, effectively reducing the space occupied by the device in the storage state and improving storage convenience.

[0030] Specifically, the locking assembly 4 includes a fastening bolt 41 and a fastening nut 42. The fastening nut and the fastening bolt 41 are respectively a matching star nut and a hexagonal head bolt. The side wall of the front connector 51 is provided with a mounting hole 514. The rod of the fastening bolt 41 is placed in the mounting hole 514, while the head extends out of the caster 3 and is threadedly engaged with the fastening nut 42.

[0031] Therefore, the mounting hole 514 provides precise alignment for the rigid connection between the wheel and the front connector 51. The threaded connection of the bolt and nut forms an axial preload, pressing the wheel against the side wall of the front connector 51, dispersing the impact energy of the dynamic load on the connection point, and reducing the possibility of the wheel falling off due to long-term use. The head of the fastening bolt 41 extending outside the wheel allows the user to rotate the fastening nut 42 and manually release its threaded engagement with the fastening bolt 41, thereby completing the quick locking and releasing of the caster 3 without the need for additional tools, thus improving operational efficiency.

[0032] Furthermore, in this embodiment, the star nut adopts a 30° wedge-shaped slope design, which increases the thread friction and mechanical interference to prevent loosening. It is especially suitable for vibration or impact load environments. The hexagonal head bolt is compatible with standard wrenches. Its hexagonal structure increases the number of force application points, which can ensure that the preload is evenly distributed and reduce the risk of connection failure due to loosening.

[0033] In summary, this structural design effectively reduces installation time and maintenance frequency by leveraging the high compatibility of hexagonal head bolts and star nuts, thereby lowering long-term operating costs. The versatility of hexagonal head bolts also complements the anti-loosening properties of star nuts, thus balancing installation efficiency and reliability.

[0034] On the other hand, the connecting frame 5 also includes two rear connecting parts 52 rotatably connected to the other end of the bearing rod 53. The front connecting part 51 and the rear connecting part 52 are fixedly connected by the connecting rod 56 and form a triangular structure with the bearing rod 53. The two ends of the connecting rod 56 are respectively engaged with the shaft holes of the front connecting part 51 and the rear connecting part 52.

[0035] Furthermore, the base 2 has a hollow bottom and covers the support rod 53. The top of each of the two rear connectors 52 is provided with a clearance groove 521 that matches the support rod 53. The bottom of the rear connector 52 is also provided with a support rod 54 that abuts against the ground. The first reinforcement part 55 is horizontally fixed between the two support rods 54.

[0036] Correspondingly, the clearance groove 521 ensures that the bearing rod 53 and the rear connector 52 fit tightly together, reducing relative displacement. A mechanical transmission path is formed between the base 2 and the support rod 54. The triangular stable structure formed by the front connector 51, the rear connector 52, the connecting rod 56, and the bearing rod 53, together with the rigid frame formed by the first reinforcement 55 and the support rods 54 on both sides, can disperse the load pressure of the vehicle body, improve the overall torsional resistance, and decompose the vertical load into axial pressure and ground friction through the inclined contact between the support rod 54 and the ground, thereby reducing the risk of slippage, deformation and breakage of equipment components.

[0037] Meanwhile, the shaft holes at both ends of the connecting rod 56 allow it to rotate around the front connecting member 51 along with the bearing rod 53, and the support rod 54 can also rotate around the end connection point of the bearing rod 53 along with the rear connecting member 52 until it is tightly fitted with the bearing rod 53. Therefore, when the device is in a fully retracted state, the pull rod 1, base 2, bearing rod 53 and support rod 54 are stacked in sequence, which further reduces the space occupied and improves the storage efficiency.

[0038] Furthermore, a second reinforcement member 13 is laterally fixed between the two telescopic rods 12 and between the two front connectors 51, which reduces the risk of lateral deformation of the telescopic rods 12 and the front connectors 51 and improves the bending resistance. The base 2 is also clearance-fitted with the second reinforcement member 13 on the front connector 51, which reduces the risk of mechanical interference when the base 2 rotates with the bearing rod 53.

[0039] On the other hand, in this embodiment, the upper surface of the base 2 is integrally formed with cross-arranged anti-slip textures 21, which increase the friction coefficient of the contact surface through micro-protrusions, reduce the horizontal displacement of the object being transported on the base 2, and improve the transportation stability of the device under dynamic load.

[0040] In addition, the top of the two front connectors 51 are provided with insertion slots 511, and the groove wall of the insertion slot 511 extends inward in a circumferential direction to provide a limiting block 512. The telescopic rod 12 is inserted into the insertion slot 511 and there is an interference fit between it and the limiting block 512. This structural design suppresses the axial slippage of the telescopic rod 12 in the insertion slot 511 through radial constraint and reduces the uneven wear caused by unilateral force, thus ensuring connection stability.

[0041] The implementation principle of a quick-release luggage cart according to an embodiment of this application is as follows: the user drives the telescopic rod 12 to compress axially by pressing the handle 11, thereby reducing its length. The base 2 can rotate with the bearing rod 53 around the front connecting piece 51 until it is close to the retracted pull rod 1. The casters 3 use the locking assembly 4 to quickly fasten and separate from the front connecting piece 51. This quick-release luggage cart achieves efficient loading and unloading and flexible use through modular design, effectively reducing the space occupied by the device in the storage state and improving storage convenience.

[0042] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] 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 quick-release luggage trolley, characterized in that, The device includes a pull rod (1), a base (2), a connecting frame (5), a locking assembly (4), and casters (3). The connecting frame (5) includes two front connectors (51) and a support rod (53). The top side wall of the front connector (51) is integrally formed with a rotating groove (513). One end of the support rod (53) is rotatably connected to the rotating groove (513). The pull rod (1) includes a handle (11) and a pair of telescopic rods (12). The telescopic rods (12) are located on the top of the front connectors (51). The base (2) is fixed to the support rod (53). The casters (3) are detachably connected to the front connectors (51) through the locking assembly (4).

2. The quick-release luggage trolley according to claim 1, characterized in that, The locking assembly (4) includes a fastening bolt (41) and a fastening nut (42). The side wall of the front connector (51) is provided with a mounting hole (514). The body of the fastening bolt (41) is placed in the mounting hole (514). The head of the fastening bolt (41) extends out of the caster (3) and is threadedly engaged with the fastening nut (42).

3. A quick-release luggage trolley according to claim 2, characterized in that, The fastening nut (42) is a star nut, and the fastening bolt (41) is a hexagonal head bolt that is compatible with the fastening nut (42).

4. A quick-release luggage trolley according to claim 1, characterized in that, The connecting frame (5) also includes two rear connectors (52) rotatably connected to the other end of the bearing rod (53). The front connector (51) and the rear connector (52) are fixedly connected by a connecting rod (56) and form a triangular structure with the bearing rod (53). The two ends of the connecting rod (56) are respectively engaged with the shaft holes of the front connector (51) and the rear connector (52).

5. A quick-release luggage trolley according to claim 4, characterized in that, The base (2) is hollowed out at the bottom and covers the support rod (53). The top of each of the two rear connectors (52) is provided with a clearance groove (521) that is compatible with the support rod (53). The bottom of the rear connector (52) is inclined and has a support rod (54) that abuts against the ground. A first reinforcement part (55) is arranged horizontally between the two support rods (54).

6. A quick-release luggage trolley according to claim 1, characterized in that, A second reinforcement member (13) is provided laterally between the two telescopic rods (12) and between the two front connectors (51), and the base (2) is clearance-fitted with the second reinforcement member (13) on the front connector (51).

7. A quick-release luggage trolley according to claim 1, characterized in that, The upper surface of the base (2) is provided with horizontal or cross-arranged anti-slip textures (21).

8. A quick-release luggage trolley according to claim 1, characterized in that, The top of the two front connectors (51) is provided with an insertion groove (511), and the groove wall of the insertion groove (511) extends inward in the circumferential direction to provide a limiting block (512). The telescopic rod (12) is inserted into the insertion groove (511) and there is an interference fit between it and the limiting block (512).

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