Trolley with detachable wheels

Abstract

The utility model relates to the technical field of trolleys, in particular to a trolley with detachable wheels, which comprises a folding frame, a bed frame for an infant to lie down, a front wheel assembly and a rear wheel assembly, the front wheel assembly and the rear wheel assembly are arranged below the folding frame, and the bed frame is arranged on the folding frame. A connecting pipe for inserting the front wheel assembly is vertically arranged on one side of the folding frame, the connecting pipe is fixedly connected with the folding frame, and the front wheel assembly is detachably connected with the connecting pipe; the rear wheel assembly is arranged on the side, away from the front wheel assembly, of the frame and detachably connected with the folding frame. The trolley has the advantages that the problem that the trolley occupies a large storage space is solved, and the storage efficiency of the trolley is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wheelbarrows, and in particular to a wheelbarrow with detachable wheels. Background Art

[0002] Strollers are a common means of transportation for parents to take their children for walks or outings. Strollers are usually equipped with a bed frame to provide a lying space for infants and young children who cannot walk independently. In order to consider the comfort of infants and young children, the stroller will be designed with a wider bed frame structure, so the overall frame will also be widened to ensure the support stability and driving safety of the stroller.

[0003] The wide body design of the bed frame and the vehicle frame increases the size of the trolley. In order to prevent the larger vehicle body from occupying too much storage space, in the related art, in order to reduce the storage space of the vehicle body, the vehicle frame and the bed frame are designed to be foldable, so that the trolley can be folded and collapsed along the length direction or width direction of the vehicle body, thereby reducing the lateral space occupied.

[0004] With respect to the above-mentioned related technologies, after the trolley is folded horizontally, the wheel structure at the bottom thereof will occupy the longitudinal space in terms of height. While occupying the storage space, it also affects the convenience of storage. Especially when the trolleys need to be transported in batches, it will waste the transportation space and increase the transportation cost. Utility Model Content

[0005] In order to improve the problem that a trolley occupies a large storage space and improve the storage efficiency of the trolley, the present application provides a trolley with detachable wheels.

[0006] The present application provides a trolley with detachable wheels adopts the following technical solution:

[0007] A trolley with detachable wheels, comprising a folding frame, a bed frame for a child to lie on, and a front wheel assembly and a rear wheel assembly arranged below the folding frame, the bed frame being arranged on the folding frame, a connecting pipe for the front wheel assembly to be inserted is vertically arranged on one side of the folding frame, the connecting pipe is fixedly connected to the folding frame, the front wheel assembly is detachably connected to the connecting pipe, and the rear wheel assembly is arranged on a side of the frame away from the front wheel assembly and is detachably connected to the folding frame.

[0008] By adopting the above technical solution, through the detachable connection between the front wheel assembly and the rear wheel assembly and the folding frame, the front and rear wheel assemblies can be disassembled when the trolley is not in use, reducing the space occupied by the trolley when stored. For batch transportation and storage, it can effectively save space and reduce transportation costs. The detachable wheel assembly also makes it easier for users to maintain and replace the wheels. When the wheels are worn or damaged, users can quickly remove the old wheels and install new wheels without replacing the entire trolley, thereby reducing the cost of use. The trolley takes into account the actual needs and convenience of users as a whole. Whether it is storage, transportation or daily use, it can provide a more comfortable and convenient solution, thereby improving the user experience.

[0009] Further, the front wheel assembly includes a front wheel body, a front wheel shaft and a U-shaped mounting block, the front wheel shaft is vertically arranged and rotatably connected to the center axis of the front wheel body, the U-shaped mounting block has a U-shaped groove for the front wheel body to be installed, the front wheel body is installed in the U-shaped groove and a gap for rotation is left between the front wheel body and the U-shaped mounting block, and the two ends of the U-shaped mounting block are respectively fixedly connected to the two ends of the front wheel shaft;

[0010] A connecting rod is fixedly connected to one side of the U-shaped mounting block away from the opening. The connecting rod is inserted into the connecting pipe and is rotatably connected to the connecting pipe.

[0011] By adopting the above technical solution, the front wheel assembly realizes a stable connection between the front wheel and the frame through the matching arrangement between the front wheel body, the front wheel shaft and the U-shaped mounting block. The U-shaped mounting block enables the front wheel body to be installed into the U-shaped groove and realizes a rotation connection through the front wheel shaft. A gap is left between the front wheel and the U-shaped mounting block, so that the front wheel can rotate flexibly, ensuring the stability of the front wheel during the rotation process. The detachable connection between the connecting rod and the connecting pipe facilitates the disassembly and assembly of the front wheel assembly on the frame, thereby reducing the space occupied by the trolley when it is stored.

[0012] Furthermore, a limiting plug is inserted on the end of the connecting tube away from the front wheel body, the outer wall of the lower part of the limiting plug abuts against the connecting tube, the upper part of the limiting plug protrudes from the connecting tube, and the outer wall of the connecting rod abuts against the inner wall of the limiting plug and is detachably connected.

[0013] By adopting the above technical solution, the limit plug can enhance the connection stability between the front wheel assembly and the frame after the connecting rod is inserted into the connecting tube, reduce the shaking or falling off of the front wheel during use, and thus improve the overall safety and stability of the trolley. The limit plug is set between the connecting rods without mutual interference, and the connecting rod can be pulled out of the connecting tube and the limit plug to achieve rapid disassembly of the front wheel assembly. The lower outer wall of the limit plug abuts against the connecting tube to form a closed space, which can prevent dust and debris from entering the connecting tube and affecting the use of the connecting rod.

[0014] Furthermore, an annular groove is provided on the side wall of the connecting rod away from the front wheel body, and a telescopic part is embedded on the inner wall of the limiting plug. One end of the telescopic part is pressed against the limiting plug, and the end of the telescopic part away from the limiting plug is stuck in the annular groove and pressed against the connecting rod.

[0015] By adopting the above technical solution, an annular groove is provided on the side wall of the connecting rod, and a telescopic member is embedded on the inner wall of the limit plug. One end of the telescopic member is pressed against the limit plug, and the other end is inserted into the annular groove and pressed against the connecting rod. Such a setting enables a clamping and fixing effect to be achieved between the connecting rod and the limit plug, thereby enhancing the firmness of the connection between the two and improving the overall stability and safety of the trolley. When disassembly is required, the user only needs to apply force to shrink the telescopic member to pull the connecting rod out of the connecting tube. When installing, the user only needs to insert the connecting rod into the connecting tube and push the telescopic member to make it snap into the annular groove to achieve the clamping effect. The mutual abutment between the telescopic member and the annular groove prevents the connecting rod from accidentally falling off during use, especially in the case of bumps or vibrations, further improving the safety and reliability of the trolley.

[0016] Furthermore, a limiting member is provided on the outer wall of the limiting plug away from the telescopic member, the limiting member passes through the limiting plug and the end of the limiting member is stuck in the annular groove.

[0017] By adopting the above technical solution, the connection between the connecting rod and the limiting plug is more stable through the double locking mechanism of the telescopic part and the limiting part. The telescopic part provides an initial tight connection, and the limiting part further ensures that the connecting rod will not accidentally slip out or fall off during use, thereby improving the stability and safety of the trolley. The setting of the limiting part makes the connection and disassembly process simpler and more intuitive. The user only needs to pass the limiting part through the limiting plug and snap it into the annular groove of the connecting rod to complete the stable connection between the front wheel assembly and the frame. The double locking mechanism of the telescopic part and the limiting part enables the front wheel assembly of the trolley to adapt to different usage environments and user needs. Whether it is driving on bumpy roads or in situations where frequent disassembly and installation are required, a stable connection between the front wheel assembly and the frame can be ensured.

[0018] Furthermore, the folding frame is provided with a mounting tube for inserting the rear wheel assembly, and the rear wheel assembly includes a rear wheel body, a rear wheel shaft and a connecting block, the rear wheel shaft is vertically penetrated at the center axis position of the rear wheel body, and the end of the rear wheel shaft away from the connection with the rear wheel body is rotatably connected to the connecting block, and a first plug-in tube for inserting the mounting tube is fixedly connected to the connecting block, and the first plug-in tube is coaxially inserted into the mounting tube and abuts against the inner wall of the mounting tube.

[0019] By adopting the above technical solution, the rear wheel shaft is rotatably connected to the connecting block, and the first plug-in tube fixedly connected to the connecting block is coaxially inserted into the mounting tube, so that the installation of the rear wheel assembly on the frame can be more stable, which not only reduces the shaking of the rear wheel body during driving, but also improves the overall stability of the cart. The disassembly and assembly process of the rear wheel assembly is simple and convenient. It only needs to coaxially insert or pull out the first plug-in tube on the connecting block into the mounting tube to realize the disassembly and assembly of the rear wheel body assembly, which is convenient for users to store and transport, and also convenient for the maintenance and replacement of the rear wheel assembly.

[0020] Furthermore, a first limiting convex step is provided on the outer wall of the first plug-in tube near one end of the connecting block, and when the first plug-in tube is inserted into the mounting tube, the end surface of the mounting tube away from the end of the folding frame abuts against the first limiting convex step.

[0021] By adopting the above technical solution, a first limiting convex step is provided on the outer wall of the first plug-in tube near one end of the connecting block, and the end face of the mounting tube away from the folding frame abuts against the first limiting convex step. Such a setting can limit the axial displacement of the rear wheel assembly in the mounting tube, enhance the installation stability of the rear wheel assembly, avoid the loosening or falling off phenomenon that may occur during long-term use or driving on bumpy roads, and improve the overall safety and reliability of the trolley. The setting of the first limiting convex step makes it easy to position the rear wheel assembly during installation. The user only needs to insert the first plug-in tube into the mounting tube and observe that the first limiting convex step abuts against the end face of the mounting tube to confirm that the rear wheel assembly has been installed in place, avoiding excessive insertion of the first plug-in tube into the mounting tube, simplifying the installation process, improving installation efficiency, and also helping to protect the inner wall of the mounting tube and the outer wall of the first plug-in tube from unnecessary wear.

[0022] Furthermore, a telescopic locking piece is provided on the side wall of the upper part of the first plug-in tube, and the telescopic locking piece is located on the side of the first limiting convex step away from the rear wheel body. A fixing hole for the telescopic locking piece to pass through and be clamped is opened on the tube wall at the corresponding position of the mounting tube and the telescopic locking piece.

[0023] By adopting the above technical solution, the first limiting convex step provides axial limiting for the first plug-in tube, and the coordinated arrangement of the telescopic locking piece and the fixing hole provides an additional locking mechanism for the rear wheel assembly. When the first plug-in tube is fully inserted into the mounting tube, the telescopic locking piece can pass through the fixing hole of the mounting tube and engage, thereby fixing the rear wheel assembly and preventing the first plug-in tube from accidentally moving or falling off, thereby enhancing the connection stability between the rear wheel assembly and the frame and improving the overall safety of the cart.

[0024] Furthermore, the folding frame is also provided with a limiting tube for limiting the radial rotation of the rear wheel body, the limiting tube is arranged at an adjacent position of the mounting tube away from the side of the front wheel body, and a supporting reinforcement tube is fixedly connected to the relative outer walls of the limiting tube and the mounting tube;

[0025] A second plug-in tube is arranged on the connection block at a position adjacent to the first plug-in tube. The second plug-in tube is coaxially inserted into the limiting tube and abuts against the inner wall of the limiting tube.

[0026] By adopting the above technical solution, the radial rotation of the rear wheel body is limited by adding a limit tube, which effectively prevents the rear wheel from shaking or deflecting during driving, and further enhances the stability of the rear wheel assembly. A second plug-in tube is added to the connecting block, and the first plug-in tube and the second plug-in tube are correspondingly inserted into the mounting tube and the limit tube to complete the installation of the rear wheel assembly. The limit tube and the mounting tube are fixedly connected by a support reinforcement tube to form an H-shaped structure, which enhances the rigidity of the frame and improves the load-bearing capacity of the frame, making the cart more stable when carrying heavy objects or being impacted.

[0027] Furthermore, a second limiting convex step is provided on the outer wall of the second plug-in tube near one end of the connecting block. When the second plug-in tube is inserted into the limiting tube, the end surface of the limiting tube away from one end of the folding frame abuts against the second limiting convex step.

[0028] By adopting the above technical solution, the second limiting convex step is arranged in coordination with the first limiting convex step, so that the installation of the rear wheel assembly is subject to a double limiting effect, which enhances the installation stability of the rear wheel assembly on the frame, and ensures that the rear wheel assembly can remain stable and not easily displaced or shaken even when driving on bumpy or uneven roads. The second limiting convex step is easy for the user to position and fix when installing the rear wheel assembly. The rear wheel assembly can be confirmed to be installed in place by inserting the second plug-in tube into the limiting tube and observing that the second limiting convex step abuts against the end face of the limiting tube. The abutment between the end face of the limiting tube away from the folding frame and the second limiting convex step makes the force distribution of the entire rear wheel assembly more uniform, thereby improving the reliability and durability of the structure.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. Through the detachable connection between the front wheel assembly and the rear wheel assembly and the folding frame, the front and rear wheel assemblies can be disassembled when the trolley is not in use, reducing the space occupied during storage. For batch transportation and storage, it can effectively save space and reduce transportation costs. At the same time, the detachable design of the wheel assembly also facilitates the user to maintain and replace the wheels, reducing the cost of use;

[0031] 2. The front wheel assembly is stably connected to the folding frame through the cooperation of the front wheel body, the front wheel shaft and the U-shaped mounting block, and the rear wheel assembly is stably connected to the frame through the cooperation of the first plug-in tube, the telescopic locking piece and the fixing hole;

[0032] 3. The setting of the limit tube limits the radial rotation of the rear wheel body, and the setting of the support reinforcement tube enhances the structural strength of the folding frame, improves the overall stability and safety of the trolley, ensures the stability and safety of the trolley during driving, and reduces potential risks caused by shaking or falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of a trolley with detachable wheels in an assembled state according to an embodiment of the present application.

[0034] Figure 2 It is a schematic diagram of the overall structure of a trolley with detachable wheels in an embodiment of the present application, in which a front wheel assembly and a rear wheel assembly are in a detached state.

[0035] Figure 3 It is a partial schematic diagram of the front wheel assembly in an embodiment of the present application.

[0036] Figure 4 It is a cross-sectional schematic diagram of the front wheel assembly installed in the connecting tube in the embodiment of the present application.

[0037] Figure 5 It is a partial schematic diagram of the rear wheel assembly in an embodiment of the present application.

[0038] Figure 6 It is a cross-sectional schematic diagram of the rear wheel assembly installed in the mounting tube in the embodiment of the present application.

[0039] Explanation of the reference numerals in the accompanying drawings: 1. Folding frame; 11. Connecting tube; 12. Limiting plug; 121. Telescopic member; 122. Limiting member; 13. Mounting tube; 131. Fixing hole; 14. Limiting tube; 15. Support reinforcement tube; 2. Bed frame; 3. Front wheel assembly; 31. Front wheel body; 32. Front wheel shaft; 33. U-shaped mounting block; 331. U-shaped groove; 34. Connecting rod; 341. Annular groove; 4. Rear wheel assembly; 41. Rear wheel body; 42. Rear wheel shaft; 43. Connecting block; 44. First plug-in tube; 441. First limiting convex step; 45. Telescopic locking member; 46. Second plug-in tube; 461. Second limiting convex step; 47. Crossbeam. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-6 And embodiments, the present application is further described in detail.

[0041] The present application embodiment discloses a wheelbarrow with detachable wheels. The words such as "upper" and "lower" used to express the position relationship in the present embodiment are determined with reference to the placement and installation position of the wheelbarrow when it is in normal use. Figure 1 and Figure 2 The trolley with detachable wheels comprises a folding frame 1, a bed frame 2, a front wheel assembly 3 and a rear wheel assembly 4. The bed frame 2 is arranged above the folding frame 1, and the front wheel assembly 3 and the rear wheel assembly 4 are both arranged below the folding frame 1 and are respectively placed on the front and rear sides of the folding frame 1.

[0042] The folding frame 1 is provided with a connecting pipe 11 for connecting the front wheel assembly 3. The connecting pipe 11 is parallel to the height direction of the folding frame 1 and is fixedly connected to an adjacent position of the folding frame 1. A limiting plug 12 is embedded above the connecting pipe 11.

[0043] Reference Figure 2 and Figure 3 In this embodiment, the number of the front wheel assemblies 3 is two, and the two sets of front wheel assemblies 3 are symmetrically arranged on both sides of the folding frame 1 along the width direction. The front wheel assembly 3 includes a front wheel body 31, a front wheel shaft 32 and a U-shaped mounting block 33. The front wheel shaft 32 is vertically arranged and rotatably connected to the center axis of the front wheel body 31. The U-shaped mounting block 33 has a U-shaped groove 331 for mounting the front wheel body 31. The front wheel body 31 is installed in the U-shaped groove 331, and the two ends of the front wheel shaft 32 are fixedly connected to the two opposite inner walls of the U-shaped mounting block 33 respectively.

[0044] A connecting rod 34 is fixedly connected to the side of the U-shaped mounting block 33 close to the folding frame 1. The end of the connecting rod 34 away from the U-shaped mounting block 33 is inserted into the connecting pipe 11. An annular groove 341 is formed on the side wall of the end of the connecting rod 34 away from the U-shaped mounting block 33. Figure 4 A telescopic member 121 is embedded on the inner wall of the stopper plug 12. The stopper 122 in this embodiment is preferably a spring. When the connecting rod 34 is inserted into the connecting tube 11, the two ends of the telescopic member 121 abut against the stopper plug 12 and the annular groove 341, respectively, and the connecting rod 34 abuts against the inner wall of the connecting tube 11.

[0045] The limiting plug 12 is away from the side where the telescopic member 121 is provided. A limiting member 122 is vertically penetrated through the outer wall of the limiting plug 12 . The limiting member 122 is located at the end position inside the limiting plug 12 and is clamped in the annular groove 341 of the connecting rod 34 .

[0046] Reference Figure 2 and Figure 5 The rear wheel assembly 4 includes a rear wheel body 41, a rear wheel shaft 42 and a connecting block 43. Figure 6 The rear wheel shaft 42 is vertically passed through and fixedly connected to the center axis of the rear wheel body 41, and one end of the rear wheel shaft 42 away from the rear wheel body 41 is vertically passed through and rotatably connected to the connecting block 43. The number of the rear wheel assemblies 4 in this embodiment is two, and two parallel cross beams 47 are fixedly connected between two opposite surfaces of the two connecting blocks 43, and the two cross beams 47 are respectively disposed on both sides of the connecting block 43 to improve the supporting strength of the connecting block 43.

[0047] A mounting tube 13 and a limiting tube 14 are disposed adjacent to and parallel to each other on one side of the folding frame 1 away from the front wheel assembly 3 , and a supporting reinforcing tube 15 is vertically fixedly connected between two opposite side walls of the mounting tube 13 and the limiting tube 14 .

[0048] A first plug-in tube 44 and a second plug-in tube 46 are adjacently arranged and vertically fixedly connected on the connection block 43. The first plug-in tube 44 can be inserted into the mounting tube 13 and abut against the inner wall of the mounting tube 13, and the second plug-in tube 46 can be inserted into the limiting tube 14 and abut against the inner wall of the limiting tube 14. A first limiting convex step 441 is integrally arranged on the outer wall of the first plug-in tube 44 near the end of the connection block 43, and a second limiting convex step 461 is integrally arranged on the outer wall of the second plug-in tube 46 near the end of the connection block 43. When the first plug-in tube 44 is inserted into the mounting tube 13, the lower end surface of the mounting tube 13 abuts against the first limiting convex step 441, and when the second plug-in tube 46 is inserted into the limiting tube 14, the lower end surface of the limiting tube 14 abuts against the second limiting convex step 461.

[0049] Reference Figure 5 and Figure 6 A telescopic locking piece 45 is vertically penetrated on the tube wall of the first plug tube 44 away from the second plug tube 46, and a fixing hole 131 for the telescopic locking piece 45 to pass through and be clamped and fixed is opened on the tube wall at a position corresponding to the telescopic locking piece 45 on the mounting tube 13.

[0050] The implementation principle of a wheel trolley with detachable wheels in the embodiment of the present application is as follows: the trolley is composed of a folding frame 1, a bed frame 2, a front wheel assembly 3 and a rear wheel assembly 4. The bed frame 2 is located above the folding frame 1, and the front wheel assembly 3 and the rear wheel assembly 4 are respectively located below the folding frame 1. The front wheel body 31 is rotatably connected to the U-shaped mounting block 33 through the front wheel shaft 32, and the U-shaped mounting block 33 is detachably connected to the connecting pipe 11 on the folding frame 1 through the connecting rod 34. When the connecting rod 34 is inserted into the connecting pipe 11, the initial fixation of the front wheel assembly 3 is achieved through the interaction between the limiting plug 12 and the internal telescopic member 121 and the annular groove 341 on the connecting rod 34. The limiting member 122 on the limiting plug 12 is further inserted into the annular groove 341 of the connecting rod 34 to ensure the stable installation of the front wheel assembly 3. The rear wheel body 41 is fixedly connected to the connecting block 43 through the rear wheel shaft 42. The connecting block 43 is provided with a first plug-in tube 44 and a second plug-in tube 46, which are respectively inserted into the mounting tube 13 and the limiting tube 14 on the folding frame 1. The limiting convex steps on the first plug-in tube 44 and the second plug-in tube 46 abut against the lower end surfaces of the mounting tube 13 and the limiting tube 14 to achieve the preliminary positioning of the rear wheel assembly 4. The telescopic locking piece 45 on the first plug-in tube 44 passes through the fixing hole 131 on the mounting tube 13 and is fixed by clamping to ensure the stable installation of the rear wheel assembly 4. Both the front wheel assembly 3 and the rear wheel assembly 4 can be connected and disassembled with the folding frame 1 through simple operations, which is convenient for users to assemble and disassemble according to their needs to adapt to different usage scenarios and storage requirements. By arranging structures such as a crossbeam 47 and a support reinforcement tube 15 under the folding frame 1, the stability and load-bearing capacity of the frame are enhanced, while ensuring the firmness and safety of the wheel assembly installation.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

[0052] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in this application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

Claims

1. A trolley with detachable wheels, characterized in that: The invention comprises a folding frame (1), a bed frame (2) for a child to lie on, and a front wheel assembly (3) and a rear wheel assembly (4) arranged below the folding frame (1); the bed frame (2) is arranged on the folding frame (1); a connecting pipe (11) for inserting the front wheel assembly (3) is vertically arranged on one side of the folding frame (1); the connecting pipe (11) is fixedly connected to the folding frame (1); the front wheel assembly (3) and the connecting pipe (11) are detachably connected; and the rear wheel assembly (4) is arranged on a side of the frame away from the front wheel assembly (3) and is detachably connected to the folding frame (1).

2. The trolley with detachable wheels according to claim 1, characterized in that: The front wheel assembly (3) comprises a front wheel body (31), a front wheel shaft (32) and a U-shaped mounting block (33); the front wheel shaft (32) is vertically arranged and rotatably connected to the center axis of the front wheel body (31); the U-shaped mounting block (33) has a U-shaped groove (331) for the front wheel body (31) to be installed; the front wheel body (31) is installed in the U-shaped groove (331) and a gap for rotation is left between the front wheel body (31) and the U-shaped mounting block (33); and the two ends of the U-shaped mounting block (33) are respectively fixedly connected to the two ends of the front wheel shaft (32); A connecting rod (34) is fixedly connected to the side of the U-shaped mounting block (33) away from the opening. The connecting rod (34) is inserted into the connecting pipe (11) and is rotatably connected to the connecting pipe (11).

3. The trolley with detachable wheels according to claim 2, characterized in that: A limiting plug (12) is inserted on one end of the connecting tube (11) away from the front wheel body (31); the outer wall of the lower part of the limiting plug (12) abuts against the connecting tube (11); the upper part of the limiting plug (12) protrudes from the connecting tube (11); the outer wall of the connecting rod (34) abuts against the inner wall of the limiting plug (12) and is detachably connected.

4. The trolley with detachable wheels according to claim 3, characterized in that: An annular groove (341) is provided on the side wall of the connecting rod (34) at one end away from the front wheel body (31); a telescopic member (121) is embedded on the inner wall of the limiting plug (12); one end of the telescopic member (121) is pressed against the limiting plug (12); and the end of the telescopic member (121) away from the limiting plug (12) is inserted into the annular groove (341) and pressed against the connecting rod (34).

5. The trolley with detachable wheels according to claim 4, characterized in that: A limiting piece (122) is provided on the outer wall of the limiting plug (12) at a side away from the telescopic piece (121); the limiting piece (122) passes through the limiting plug (12) and the end of the limiting piece (122) is inserted into the annular groove (341).

6. The trolley with detachable wheels according to claim 1, characterized in that: The folding frame (1) is provided with a mounting tube (13) for inserting the rear wheel assembly (4), the rear wheel assembly (4) comprising a rear wheel body (41), a rear wheel shaft (42) and a connecting block (43), the rear wheel shaft (42) being vertically arranged at the center axis position of the rear wheel body (41), the end of the rear wheel shaft (42) away from the connection with the rear wheel body (41) being rotatably connected to the connecting block (43), the connecting block (43) being fixedly connected with a first plug-in tube (44) for inserting the mounting tube (13), the first plug-in tube (44) being coaxially inserted into the mounting tube (13) and mutually abutting against the inner wall of the mounting tube (13).

7. The trolley with detachable wheels according to claim 6, characterized in that: A first limiting convex step (441) is provided on the outer wall of one end of the first plug-in tube (44) close to the connecting block (43); when the first plug-in tube (44) is inserted into the mounting tube (13), an end surface of the mounting tube (13) away from the end of the folding frame (1) abuts against the first limiting convex step (441).

8. The trolley with detachable wheels according to claim 7, characterized in that: A telescopic locking piece (45) is provided on the side wall of the upper portion of the first plug-in tube (44), and the telescopic locking piece (45) is located on a side of the first limiting convex step (441) away from the rear wheel body (41). A fixing hole (131) for the telescopic locking piece (45) to pass through and be clamped is provided on the tube wall at a position corresponding to the mounting tube (13) and the telescopic locking piece (45).

9. The trolley with detachable wheels according to claim 7, characterized in that: The folding frame (1) is also provided with a limiting tube (14) for limiting the radial rotation of the rear wheel body (41); the limiting tube (14) is arranged at an adjacent position of the mounting tube (13) on a side away from the front wheel body (31); and a supporting reinforcement tube (15) is fixedly connected to the relative outer walls of the limiting tube (14) and the mounting tube (13); A second plug-in tube (46) is provided on the connection block (43) at a position adjacent to the first plug-in tube (44); the second plug-in tube (46) is coaxially inserted into the limiting tube (14) and abuts against the inner wall of the limiting tube (14).

10. The trolley with detachable wheels according to claim 9, characterized in that: A second limiting convex step (461) is provided on the outer wall of the second plug-in tube (46) at one end close to the connecting block (43); when the second plug-in tube (46) is inserted into the limiting tube (14), the end surface of the limiting tube (14) away from the end of the folding frame (1) abuts against the second limiting convex step (461).

Images