Foldable cart with wheels convenient to disassemble and assemble

Abstract

The utility model provides a foldable cart with wheels convenient to disassemble and assemble, which comprises a frame, the frame comprises two front vertical pipes and two rear vertical pipes, a front telescopic support is movably connected between the two front vertical pipes, a rear telescopic support is movably connected between the two rear vertical pipes, and the two rear vertical pipes are connected with the front telescopic support. Two side edge telescopic supports and a bottom telescopic support are correspondingly arranged between the front vertical pipes and the rear vertical pipes, front wheel assemblies are detachably arranged at the lower ends of the two front vertical pipes, and rear wheel assemblies are detachably arranged at the lower ends of the two rear vertical pipes. The cart is simple in structure, the front wheel assembly and the rear wheel assembly are designed to be detachable, the front wheel assembly and the rear wheel assembly are convenient to disassemble and assemble, the folding size of the cart can be effectively reduced, the cart is convenient to package, and therefore the transportation size of products is reduced, meanwhile, due to the fact that the wheels are accessories prone to loss and convenient to replace, the cart is convenient to use, and the cost is reduced. Therefore, the use effectiveness of the whole cart is improved, and the use cost of consumers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of trolleys, specifically to a foldable trolley with easily detachable and detachable wheels. Background Technology

[0002] As people's living standards improve, their desire for outdoor activities is growing stronger, and their demands for convenience are increasing. When engaging in outdoor activities, it is necessary to transport some odds and ends required for the activity. At this time, folding trolleys that are easy to fold and carry have emerged.

[0003] Chinese Patent No. CN192121254167.5 discloses a folding trolley with a frame. The frame includes two sets of spaced-apart support assemblies and a connecting rod assembly for connecting the two sets of support assemblies. Each support assembly includes a first horizontal bar, a second horizontal bar, and two foldable vertical bars. The two ends of one foldable vertical bar are hinged to one end of the first horizontal bar and one end of the second horizontal bar, respectively. The two ends of the other foldable vertical bar are hinged to the other ends of the first horizontal bar and the other end of the second horizontal bar, respectively. The foldable vertical bars have a supported state and a folded state. The frame has an open state and a retracted state. When in the open state, both foldable vertical bars are in the supported state. When switching from the open state to the retracted state, both foldable vertical bars simultaneously switch from the supported state to the folded state. Folding is performed synchronously through the front and rear supports, which facilitates the folding of other frame components and simplifies operation.

[0004] However, the aforementioned folding trolleys only have a folding function; the components at the front and rear wheel positions are not detachable, and the wheel area is relatively large, so the folded trolley still has a certain height. There is still room for improvement in terms of packaging, transportation, or storage space after the folding of the trolley. At the same time, if the wheel structure is damaged during use, the entire trolley will become unusable, resulting in high usage costs for consumers. Utility Model Content

[0005] The purpose of this invention is to provide a foldable trolley with easily detachable and detachable wheels, in order to solve the problems of fixed wheels on existing trolleys, which result in a large folding volume, making packaging and transportation inconvenient, and the high cost of use due to the scrapping of the entire trolley if the wheels are damaged.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] A foldable trolley with easily detachable wheels includes a frame. The frame includes two front uprights and two rear uprights. A front telescopic bracket is movably connected between the two front uprights, and a rear telescopic bracket is movably connected between the two rear uprights. Two side telescopic brackets and a bottom telescopic bracket are correspondingly provided between the front and rear uprights. Front wheel assemblies are detachably mounted on the lower ends of the two front uprights, and rear wheel assemblies are detachably mounted on the lower ends of the two rear uprights. The front wheel assembly includes a front wheel bracket, with a front wheel rotatably connected to the lower end of the front wheel bracket. A connecting rod is provided on the upper end of the front wheel bracket. The connecting rod passes through the front upright and is connected to or disconnected from the front upright via a plug. The rear wheel assembly includes a rear wheel bracket, with a rear wheel rotatably connected to the lower end of the rear wheel bracket. A connecting tube is provided on the upper end of the rear wheel bracket. The connecting tube passes through the rear upright and is connected to or disconnected from the rear upright via an elastic component.

[0008] Preferably, the outer end of the aforementioned front riser is fitted with a first connector and a second connector, and the four ends of the front telescopic bracket are respectively movably connected between the two first connectors and the two second connectors. The first connector is provided with a threaded connection hole, the front riser is provided with a first connection hole, and the connecting rod is provided with a limiting groove. The insert passes through the threaded connection hole and the first connection hole in sequence, and the end of the insert is locked in the limiting groove.

[0009] Preferably, the connecting rod is further provided with a fixing sleeve, which has a fixing hole for the insert to pass through. The fixing sleeve is fitted into the front riser, and the fixing sleeve and the front riser are detachably connected.

[0010] Preferably, the outer end of the aforementioned rear riser is fitted with a third connector and a fourth connector. The four ends of the rear telescopic bracket are respectively movably connected between two third connectors and two fourth connectors. The elastic component includes a U-shaped spring sheet, which is elastically locked inside the connecting tube and has a connector head. Two U-shaped limiting grooves are symmetrically arranged on the connecting tube. The connecting tube also has a second connecting hole for the elastic extension and retraction of the connector head. The third connector has a notch designed at the position corresponding to the connector head. The rear riser has a third connecting hole for the elastic extension and retraction of the connector head. Two limiting holes are also symmetrically arranged on the rear riser. A limiting rod passes through the third connector, the two limiting holes, and the two U-shaped limiting grooves.

[0011] Preferably, a foldable pull rod assembly is movably disposed between the two first connecting members. The pull rod assembly includes a first fixing member and a second fixing member. A pull rod and two support rods are rotatably connected to the first fixing member. A rotating member is disposed at the other end of the support rod. The rotating member is connected to the second fixing member. The second fixing member is connected to the first connecting member.

[0012] Preferably, the aforementioned plug includes a plug rod and a threaded sleeve. The plug rod passes through the threaded sleeve, and a spring is fitted inside the threaded sleeve at the position where the plug rod is located. The threaded sleeve is connected to a threaded connection hole. The plug rod moves elastically within the threaded sleeve, causing one end of the plug rod to engage or disengage from the limiting groove. A pull ring is provided at the other end of the plug rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The trolley of the present invention has a simple structure. By designing the front wheel assembly and the rear wheel assembly as detachable components, it is easy to disassemble and assemble the front and rear wheel assemblies, which can effectively reduce the folding volume of the trolley and facilitate the packaging of the trolley, thereby reducing the transportation volume of the product. At the same time, since the wheels are consumable parts, it is also easy to replace the wheels, thereby improving the overall usability of the trolley and reducing the user cost for consumers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the unfolded structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the retracted state structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the present invention in its folded state with the front and rear wheel assemblies separated.

[0017] Figure 4 This is a schematic diagram showing the disassembled structure of the front wheel assembly, insert, first connector and front riser in this utility model;

[0018] Figure 5 This is a schematic diagram showing the disassembled structure of the rear wheel assembly, elastic assembly, third connector, and rear riser in this utility model.

[0019] In the diagram: 1-Front riser; 2-Rear riser; 3-Front telescopic bracket; 4-Rear telescopic bracket; 5-Side panel telescopic bracket; 6-Bottom telescopic bracket; 7-Front wheel bracket; 8-Front wheel; 9-Connecting rod; 10-Rear wheel bracket; 11-Rear wheel; 12-Connecting pipe; 13-First connector; 14-Second connector; 15-Fixing sleeve; 16-Third connector; 17-Fourth connector; 18-U-shaped spring; 19-Connector; 20-Limiting rod; 21-First fixing component; 22-Second fixing component; 23-Pull rod; 24-Support rod; 25-Rotating component; 26-Insertion rod; 27-Threaded sleeve; 28-Spring; 29-Pull ring; 101-First connecting hole; 201-Third connecting hole; 901-Limiting groove; 1201-U-shaped limiting groove; 1202-Second connecting hole; 1301-Threaded connecting hole; 1501-Fixing hole. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figure 1-5 As shown, a foldable trolley with easily detachable wheels includes a frame. The frame includes two front uprights 1 and two rear uprights 2. A front telescopic bracket 3 is movably connected between the two front uprights 1, and a rear telescopic bracket 4 is movably connected between the two rear uprights 2. Two side telescopic brackets 5 and a bottom telescopic bracket 6 are correspondingly arranged between the front uprights 1 and the rear uprights 2. Front wheel assemblies are detachably mounted on the lower ends of the two front uprights 1, and rear wheel assemblies are detachably mounted on the lower ends of the two rear uprights 2. The front wheel assemblies include front... The front wheel bracket 7 has a front wheel 8 rotatably connected to its lower end, and a connecting rod 9 is provided at the upper end of the front wheel bracket 7. The connecting rod 9 passes through the front riser tube 1 and is connected or disconnected from the front riser tube 1 by a plug. The rear wheel assembly includes a rear wheel bracket 10, a rear wheel 11 rotatably connected to its lower end, and a connecting pipe 12 is provided at the upper end of the rear wheel bracket 10. The connecting pipe 12 passes through the rear riser tube 2 and is connected or disconnected from the rear riser tube 2 by an elastic component.

[0022] The trolley of this utility model has a simple structure. By designing the front wheel assembly and rear wheel assembly as detachable components, it is easy to disassemble and assemble the front and rear wheel assemblies, which can effectively reduce the folded volume of the trolley and facilitate packaging, thereby reducing the transportation volume of the product. At the same time, since the wheels are consumable parts, they are easy to replace, thereby improving the overall usability of the trolley and reducing the cost of use for consumers.

[0023] Furthermore, the outer end of the aforementioned front riser 1 is fitted with a first connector 13 and a second connector 14. The four ends of the front telescopic bracket 3 are respectively movably connected between the two first connectors 13 and the two second connectors 14. The first connector 13 is provided with a threaded connection hole 1301, the front riser 1 is provided with a first connection hole 101, and the connecting rod 9 is provided with a limiting groove 901. The insert passes through the threaded connection hole 1301 and the first connection hole 101 in sequence, and the end of the insert is locked in the limiting groove 901.

[0024] In the above design, the plug is threaded into the threaded connection hole on the first connector 13 to connect the connecting rod 9 and the front riser 1, which is the installation of the front wheel assembly. When the plug is removed, the connecting rod 9 is separated from the front riser 1, and the front wheel assembly is removed. The operation is simple and facilitates the disassembly and assembly of the front wheel 8. At the same time, the first connector 13 is provided with several connecting grooves for movably connecting the front telescopic bracket 3, the bottom telescopic bracket 6 and the side telescopic bracket 5. The second connector 14 is also provided with connecting grooves for movably connecting the front telescopic bracket 3 and the side telescopic bracket 5.

[0025] Furthermore, a fixing sleeve 15 is provided on the outside of the connecting rod 9. The fixing sleeve 15 is provided with a fixing hole 1501 for the insert to pass through. The fixing sleeve 15 is fitted into the front riser 1, and the fixing sleeve 15 and the front riser 1 are detachably connected. The above design, through the fixing sleeve 15, can enhance the connection strength and stability between the connecting rod 9 and the front riser 1.

[0026] Furthermore, the outer end of the aforementioned rear riser 2 is fitted with a third connector 16 and a fourth connector 17. The four ends of the rear telescopic bracket 4 are respectively movably connected between the two third connectors 16 and the two fourth connectors 17. The elastic component includes a U-shaped spring sheet 18, which is elastically locked inside the connecting tube 12. A connector 19 is provided on the U-shaped spring sheet 18. Two U-shaped limiting grooves 1201 are symmetrically provided on the connecting tube 12. A second connecting hole 1202 for the elastic extension and retraction of the connector 19 is also provided on the connecting tube 12. A notch is designed on the third connector 16 corresponding to the position of the connector 19. A third connecting hole 201 for the elastic extension and retraction of the connector 19 is provided on the rear riser 2. Two limiting holes are also symmetrically provided on the rear riser 2. A limiting rod 20 passes through the third connector 16, the two limiting holes, and the two U-shaped limiting grooves 1201.

[0027] In the above design, the connector 19 is located at the notch. By pressing the connector 19, it retracts into the third connecting hole 201 on the rear riser 2, thereby separating the connection between the rear riser 2 and the connecting pipe 12. This allows the connecting pipe 12 to be dislodged from the rear riser 2, enabling the removal of the rear wheel assembly. When the connecting pipe 12 is inserted into the rear riser 2 and rises to the position of the third connecting hole 201, the connector 19 will pop out from the third connecting hole 201, thus completing the connection between the connecting pipe 12 and the rear riser 2 and enabling the installation of the rear wheel assembly. The operation is simple and facilitates the disassembly and assembly of the front wheel 8. At this time, the limiting rod 20 is just stuck at the bottom end of the two U-shaped limiting grooves 1201. The limiting rod 20 serves as both a connection between the third connector 16 and the rear riser 2 and a limiting function for the installation of the rear wheel assembly.

[0028] Specifically, the third connector 16 is provided with several connecting slots for movably connecting the rear telescopic bracket 4, the bottom telescopic bracket 6, and the side telescopic bracket 5. The fourth connector 17 is also provided with connecting slots for movably connecting the rear telescopic bracket 4 and the side telescopic bracket 5. At the same time, the fourth connector 17 and the second connector 14 can be the same structural component, and the front and rear telescopic brackets can also have the same structure. This facilitates processing, enables flexible and universal use of accessories, and reduces processing costs.

[0029] Furthermore, a foldable pull rod assembly is movably disposed between the two first connecting members 13. The pull rod assembly includes a first fixing member 21 and a second fixing member 22. A pull rod 23 and two support rods 24 are rotatably connected to the first fixing member 21. A rotating member 25 is provided at the other end of the support rods 24, and the rotating member 25 is connected to the second fixing member 22. The second fixing member 22 is connected to the first connecting member 13. The above design facilitates the folding and unfolding of the linkage assembly, improving the ease of use of the trolley.

[0030] Furthermore, the plug includes a rod 26 and a threaded sleeve 27. The rod 26 passes through the threaded sleeve 27, and a spring 28 is fitted inside the threaded sleeve 27. The threaded sleeve 27 is connected to the threaded connection hole 1301. The rod 26 moves elastically within the threaded sleeve 27, causing one end of the rod 26 to engage or disengage from the limiting groove 901. A pull ring 29 is provided at the other end of the rod 26. The above design features a simple plug-in structure. The fit between the threaded sleeve 27 and the threaded connection hole 1301 provides a fixed connection, ensuring the plug-in remains connected to the front riser tube 1 and preventing loss during disassembly and assembly. When installing the front wheel assembly, first pull the plug rod 26 outward via the pull ring 29. The plug rod 26 is in an elastic compression state. When the connecting rod 9 penetrates the front riser tube 1 to the first connection hole 101, the plug rod 26 springs back, causing its end to engage in the limiting groove 901, thus installing the front wheel assembly. To remove it, similarly pull the plug rod 26 outward to disengage its end from the limiting groove 901, then pull down the front wheel bracket 7 to remove the front wheel assembly. The disassembly and assembly are convenient and stable.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable stroller with wheels that are easy to disassemble, comprising a frame, the frame comprising two front vertical pipes and two rear vertical pipes, a front telescopic support movably connected between the two front vertical pipes, and a rear telescopic support movably connected between the two rear vertical pipes, two side telescopic supports and a bottom telescopic support correspondingly arranged between the front vertical pipes and the rear vertical pipes, characterized in that: The lower ends of the two front vertical pipes are detachably provided with front wheel assemblies, the lower ends of the two rear vertical pipes are detachably provided with rear wheel assemblies, the front wheel assembly comprises a front wheel support, a front wheel is rotatably connected to the lower end of the front wheel support, a connecting rod is arranged at the upper end of the front wheel support, the connecting rod penetrates into the front vertical pipe and is connected with or separated from the front vertical pipe through a plug, the rear wheel assembly comprises a rear wheel support, a rear wheel is rotatably connected to the lower end of the rear wheel support, a connecting pipe is arranged at the upper end of the rear wheel support, the connecting pipe penetrates into the rear vertical pipe and is connected with or separated from the rear vertical pipe through an elastic assembly.

2. The foldable cart of claim 1, wherein: The outer end of the front vertical pipe is sleeved with a first connecting piece and a second connecting piece, the four ends of the front telescopic support are correspondingly movably connected between the two first connecting pieces and the two second connecting pieces, a threaded connecting hole is arranged on the first connecting piece, a first connecting hole is arranged on the front vertical pipe, and a circle of limiting grooves is arranged on the connecting rod, the plug penetrates through the threaded connecting hole and the first connecting hole in sequence and the end of the plug is clamped in the limiting groove.

3. The foldable cart of claim 2, wherein: The outer part of the connecting rod is further provided with a fixing sleeve, a fixing hole for the plug to penetrate through is arranged on the fixing sleeve, the fixing sleeve is sleeved into the front vertical pipe, and the fixing sleeve and the front vertical pipe are detachably connected.

4. The foldable cart of claim 3, wherein: The outer end of the rear vertical pipe is sleeved with a third connecting piece and a fourth connecting piece, the four ends of the rear telescopic support are correspondingly movably connected between the two third connecting pieces and the two fourth connecting pieces, the elastic assembly comprises a U-shaped elastic sheet, the U-shaped elastic sheet is elastically clamped in the connecting pipe, a connecting head is arranged on the U-shaped elastic sheet, two U-shaped limiting grooves are symmetrically arranged on the connecting pipe, a second connecting hole for the elastic expansion of the connecting head is further arranged on the connecting pipe, a notch corresponding to the position of the connecting head is designed on the third connecting piece, a third connecting hole for the elastic expansion of the connecting head is arranged on the rear vertical pipe, two limiting holes are further symmetrically arranged on the rear vertical pipe, and a limiting rod is arranged between the third connecting piece and the two limiting holes and the two U-shaped limiting grooves.

5. The foldable cart of claim 4, wherein: A foldable pull rod assembly is movably arranged between the two first connecting pieces, the pull rod assembly comprises a first fixing piece and a second fixing piece, a pull rod and two support rods are rotatably connected to the first fixing piece, a rotating piece is arranged at the other end of the support rod, the rotating piece is connected to the second fixing piece, and the second fixing piece is connected to the first connecting piece.

6. The foldable cart of claim 2, wherein: The plug comprises a plug rod and a threaded sleeve, the plug rod penetrates into the threaded sleeve, a spring is sleeved at the position of the plug rod inside the threaded sleeve, the threaded sleeve is connected with the threaded connecting hole, and the plug rod elastically moves in the threaded sleeve, so that one end of the plug rod is clamped into or separated from the limiting groove, and the other end of the plug rod is provided with a pull ring.

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