Collapsible dolly

Abstract

This utility model discloses a foldable cargo trolley, relating to the technical field of cargo trolleys. It includes a frame comprising two parallel longitudinal square tubes, an extension square tube retractably inserted into one end of each longitudinal square tube, and a support square tube hinged to the side wall of the other end of each longitudinal square tube. Connectors are provided between the two longitudinal square tubes and between the two support square tubes; these connectors are foldable. A mounting base is fixed to the bottom of each longitudinal square tube, and rollers are rotatably mounted on the bottom of the mounting base. This utility model is a foldable cargo trolley. The trolley's frame adopts a retractable and foldable design. The extension square tube can be flexibly extended and retracted into the longitudinal square tubes, while the connectors are foldable. The support square tube is hinged to the longitudinal square tubes. Furthermore, the folding and unfolding operation of this trolley is extremely simple, requiring no complex manual locking steps. Folding and unfolding can be quickly completed through simple pushing, pulling, and flipping actions, significantly reducing loading and unloading time in logistics transportation scenarios.

Description

Technical Field

[0001] This utility model relates to the technical field of cargo carts, specifically a foldable cargo cart. Background Technology

[0002] In the fields of logistics, warehousing management, household moving, and commercial delivery, traditional cargo carts have long faced the dual contradiction of space occupation and transportation efficiency. According to market research, the thickness of ordinary flatbed logistics carts when folded generally exceeds 20 centimeters, occupying more than 0.5 square meters of storage space. Fixed wing-opening vans require manual operation of the locking mechanism when unfolded, increasing the loading and unloading time for each vehicle. In household scenarios, most consumers report that traditional shopping carts cannot pass through elevator doors (their width is usually less than 80 centimeters), making it difficult to move goods in high-rise residential buildings. Utility Model Content

[0003] The purpose of this invention is to provide a foldable cargo trolley to solve the problems mentioned in the background section.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a foldable cargo trolley, including a frame, the frame including two parallel longitudinal square tubes, an extension square tube that can be telescopically inserted into one end of the longitudinal square tubes, and a support square tube hinged to the side wall of the other end of the longitudinal square tubes.

[0005] Connectors are provided between the two longitudinal square tubes and between the two supporting square tubes, and the connectors are foldable.

[0006] The bottom end of the longitudinal square tube is fixed with a mounting base, and the bottom end of the mounting base is provided with a roller for rotation.

[0007] In a further embodiment, the connector has two connecting square tubes and a hinge seat hinged between the two connecting square tubes. One side wall of the hinge seat is provided with a baffle, which is located on the side of the hinge position of the two connecting square tubes.

[0008] In a further embodiment, the two connecting square tubes of the connector connecting the longitudinal square tubes are respectively hinged to the opposite sidewalls of the two longitudinal square tubes, and the baffle is located above the hinged position of the two connecting square tubes.

[0009] In a further embodiment, the two connecting square tubes of the connector connecting the supporting square tubes are respectively hinged to the opposite side walls of the two supporting square tubes, and the baffle is located on the side of the hinge position of the two connecting square tubes.

[0010] In a further embodiment, one of the extended square tubes is hinged to a handheld square tube at one end, and the other extended square tube has a buckle hinged to its end side wall that engages with the end of the handheld square tube.

[0011] One end of the longitudinal square tube that is inserted into the extension square tube is provided with an elastic pin, and the side wall of the end of the extension square tube that is inserted into the longitudinal square tube is provided with a limiting hole that matches the elastic pin.

[0012] In a further embodiment, a reinforcing chain is connected to the top of one longitudinal square tube sidewall, and a chain buckle is fixed to the top of the other longitudinal square tube sidewall for securing the reinforcing chain.

[0013] In a further embodiment, a base square tube is hinged to the bottom wall of the end of the supporting square tube away from the roller, and a tie rod is hinged between the side wall of the base square tube and the side wall of the mounting seat.

[0014] In a further embodiment, a locking square tube is inserted into the end of one of the supporting square tubes. The locking square tube extends from the supporting square tube and can rotate 90° around the end of the supporting square tube before engaging with the end of another supporting square tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model is a foldable cargo trolley. The frame of this trolley adopts a telescopic and foldable design. The extended square tube can be flexibly telescopically stored inside the longitudinal square tube. At the same time, the connecting parts can be folded, and the supporting square tube is hinged to the longitudinal square tube. The folding and unfolding operation of this trolley is extremely simple. There is no need for complicated manual locking steps. The folding and unfolding of the trolley can be quickly completed through simple pushing, pulling and flipping actions. In logistics transportation scenarios, it can significantly shorten loading and unloading time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the unfolded main structure of an embodiment of the present utility model; Figure 2 and Figure 3 These are all schematic diagrams of the main structure for storage in embodiments of this utility model.

[0017] In the diagram: 1. Extended square tube; 2. Longitudinal square tube; 3. Connecting square tube; 4. Hinge seat; 5. Supporting square tube; 6. Roller; 7. Base square tube; 8. Pull rod; 9. Locking square tube; 10. Reinforcing chain; 11. Handheld square tube. Detailed Implementation

[0018] 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 protection scope of the present utility model.

[0019] This embodiment provides a foldable cargo cart, such as... Figure 1 As shown, the system includes a frame comprising two parallel longitudinal square tubes 2, an extension square tube 1 that can be telescopically inserted into one end of the longitudinal square tubes 2, and a support square tube 5 hinged to the side wall of the other end of the longitudinal square tubes 2. The end of the longitudinal square tube 2 that is inserted into the extension square tube 1 is provided with an elastic pin, and the side wall of the end of the extension square tube 1 that is inserted into the longitudinal square tube 2 is provided with a limiting hole that matches the elastic pin. The matching design of the elastic pin and the limiting hole allows the extension square tube 1 to be accurately fixed on the longitudinal square tube 2 during telescopic adjustment, which is convenient to operate and reliable to fix.

[0020] like Figure 1 As shown, there are connectors between the two longitudinal square tubes 2 and between the two supporting square tubes 5. The connectors are foldable. The connectors have two connecting square tubes 3 and a hinge seat 4 hinged between the two connecting square tubes 3. One side wall of the hinge seat 4 is provided with a baffle, which is located on the side of the hinge position of the two connecting square tubes 3.

[0021] The two connecting square tubes 3 of the connector connecting the longitudinal square tubes 2 are hinged to the opposite side walls of the two longitudinal square tubes 2, and the baffle is located above the hinge position of the two connecting square tubes 3. The two connecting square tubes 3 of the connector connecting the support square tubes 5 are hinged to the opposite side walls of the two support square tubes 5, and the baffle is located on the side of the hinge position of the two connecting square tubes 3. The connector adopts a design of two connecting square tubes 3 and a hinge seat 4. The baffle on the hinge seat 4 effectively limits the rotation range of the connecting square tubes 3, preventing the trolley structure from becoming loose due to excessive rotation of the connector during transportation.

[0022] The bottom end of the longitudinal square tube 2 is fixed with a mounting base, and the bottom end of the mounting base is equipped with a roller 6 for easy movement of the trolley.

[0023] One of the extension square tubes 1 has a handle square tube 11 hinged to its end, and the other extension square tube 1 has a buckle hinged to its side wall that engages with the end of the handle square tube 11. This ensures a stable, parallel state after the two extension square tubes 1 and the longitudinal square tube 2 are unfolded. Simultaneously, a locking square tube 9 is inserted into the end of one of the support square tubes 5. The locking square tube 9 extends from within the support square tube 5 and can rotate 90° around the end of the support square tube 5 before engaging with the end of the other support square tube 5. This provides a stable, locked, parallel state after the two support square tubes 5 are unfolded, preventing the connecting parts from folding and causing the cart to be arbitrarily folded for storage, affecting normal use. The locking square tube 9 design locks the two support square tubes 5 together when the cart is folded, making the folded cart structure more compact and easier to store and transport. These detailed designs fully consider the needs of users in actual use, making the cart operation more convenient and safer.

[0024] This trolley features a flexible design. The extended square tube 1 is telescopic and adjustable in length, and the handle square tube 11, combined with a buckle, allows users to easily adjust the trolley's shape for different handling scenarios. When passing through narrow passages or elevators, the extended square tube 1 can be retracted, and the handle square tube 11 can be folded, reducing the overall size of the trolley and making it easy to pass through elevator doors. When transporting longer items, the extended square tube 2 can be extended to increase the carrying capacity.

[0025] Furthermore, a reinforcing chain 10 is connected to the top of the side wall of one of the longitudinal square tubes 2, and a chain buckle is fixed to the top of the side wall of the other longitudinal square tube 2 to secure the reinforcing chain 10. This trolley has been carefully designed in many details to further enhance the user experience. The setting of the reinforcing chain and chain buckle enhances the connection strength between the two longitudinal square tubes 2 and prevents the longitudinal square tubes 2 from separating during transportation.

[0026] Meanwhile, a base square tube 7 is hinged to the bottom wall of the supporting square tube 5 at the end away from the roller 6, and a tie rod 8 is hinged between the side wall of the base square tube 7 and the side wall of the mounting base. The design of the base square tube 7 hinged to the bottom of the supporting square tube 5 and the tie rod 8 enhances the stability of the trolley under different ground conditions. Whether on a flat road or a slightly sloping ground, it can ensure the safe transportation of goods and is suitable for various scenarios such as logistics transportation, warehouse management, household moving and commercial distribution.

[0027] Deployed State: When the trolley is needed to transport goods, pull the extension square tube 1 out of the longitudinal square tube 2 to the required length. The elastic pin automatically inserts into the corresponding limiting hole to fix the extension square tube 1. Unfold the handheld square tube 11 from the end of the extension square tube 1 and snap it into the buckle on the side wall of the end of another extension square tube 1 to form a structure that is easy to hold. Rotate the support square tube 5 around the hinge point until it contacts the ground. The base square tube 7 hangs down naturally under the action of gravity. The pull rod 8 pulls the base square tube 7 to stabilize the overall structure of the trolley. At this time, the goods can be placed on the frame of the trolley, and the trolley can be moved by the rollers 6 to transport the goods.

[0028] Folded state: such as Figure 2 and Figure 3 As shown, when the trolley is not needed, first remove the goods from the trolley. Remove the handheld square tube 11 from the buckle and fold it back to the end of the extension square tube 1. Rotate the support square tube 5 upwards around the hinge point to bring the two support square tubes 5 closer together. Extend the locking square tube 9 from the support square tube 5, rotate it 90°, and then engage it with the end of the other support square tube 5 to lock the two support square tubes 5. Push the extension square tube 1 into the longitudinal square tube 2; the elastic pin will pop out from the limiting hole until the extension square tube 1 is completely retracted into the longitudinal square tube 2. At this point, the trolley has a compact overall structure, occupies little space, and is easy to store and transport.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foldable cargo trolley, characterized in that, include: The frame includes two parallel longitudinal square tubes (2), an extension square tube (1) that can be telescopically inserted into one end of the longitudinal square tubes (2), and a support square tube (5) that is hinged to the side wall of the other end of the longitudinal square tubes (2). Connectors are provided between the two longitudinal square tubes (2) and between the two supporting square tubes (5), and the connectors are foldable. The bottom end of the longitudinal square tube (2) is fixed with a mounting base, and the bottom end of the mounting base is provided with a roller (6) for rotation.

2. The foldable cargo trolley according to claim 1, characterized in that, The connector has two connecting square tubes (3) and a hinge seat (4) hinged between the two connecting square tubes (3). One side wall of the hinge seat (4) is provided with a baffle, which is located on the side of the hinge position of the two connecting square tubes (3).

3. The foldable cargo trolley according to claim 2, characterized in that, The two connecting square tubes (3) of the connector connecting the longitudinal square tube (2) are respectively hinged to the opposite side walls of the two longitudinal square tubes (2), and the baffle is located above the hinge position of the two connecting square tubes (3).

4. The foldable cargo trolley according to claim 2, characterized in that, The two connecting square tubes (3) of the connecting member connecting the supporting square tube (5) are respectively hinged to the opposite side walls of the two supporting square tubes (5), and the baffle is located on the side of the hinge position of the two connecting square tubes (3).

5. The foldable cargo trolley according to claim 3 or 4, characterized in that, One of the extended square tubes (1) has a handheld square tube (11) hinged to its end, and the other extended square tube (1) has a buckle hinged to its end side wall that engages with the end of the handheld square tube (11). The longitudinal square tube (2) is connected to the extension square tube (1) at one end with an elastic pin, and the side wall of the extension square tube (1) inserted into the longitudinal square tube (2) is provided with a limiting hole that matches the elastic pin.

6. The foldable cargo trolley according to claim 5, characterized in that, One of the longitudinal square tubes (2) has a reinforcing chain (10) connected to the top of its side wall, and the other longitudinal square tube (2) has a chain buckle fixed to the top of its side wall to hold the reinforcing chain (10).

7. The foldable cargo trolley according to claim 5, characterized in that, The bottom wall of the supporting square tube (5) away from the roller (6) is hinged to the foot square tube (7), and a tie rod (8) is hinged between the side wall of the foot square tube (7) and the side wall of the mounting seat.

8. The foldable cargo trolley according to claim 5, characterized in that, One of the supporting square tubes (5) has a locking square tube (9) inserted into its end. The locking square tube (9) extends out of the supporting square tube (5) and can rotate 90° around the end of the supporting square tube (5) before being engaged with the end of the other supporting square tube (5).

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