Trolley provided with limiting structure and convenient to fold
By introducing front, rear, left, right and bottom telescopic structures and limit designs into the folding pulley, the folding and stability problems in the width direction are solved, achieving a more compact folding volume and higher usage stability.
Patent Information
- Application Number
- CN202421093003.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing folding trucks cannot be folded in the width direction, and they still occupy a large storage space after folding, and are prone to frame collapse during use, affecting stability.
A frame with a front, rear, left, right and bottom telescopic structure is designed. The four-direction folding of the frame is achieved on the telescopic bracket through the limiting structure, and additional stability support is provided when unfolded.
A more compact folding volume is achieved, improving the stability and safety of the frame, and preventing the frame from falling collapse caused by external forces.
Smart Images
Figure CN222291771U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chairs, in particular to a trolley which is provided with a limited position structure and is easy to fold. Background Art
[0002] As people's living standards improve, their desire for outdoor activities becomes stronger and stronger, and their requirements for convenience in life become higher and higher. When engaging in outdoor activities, they need to carry some miscellaneous items required for the activities. At this time, foldable carts that are easy to fold and carry come into being.
[0003] The Chinese authorized patent with application number CN202222264177.5 discloses a folding cart, a frame, and the frame includes two groups of bracket assemblies arranged at intervals and a connecting rod assembly for connecting the two groups of bracket assemblies, the bracket assembly includes a first cross bar, a second cross bar and two foldable vertical bars, wherein the two ends of one foldable vertical bar are respectively hingedly connected to one end of the first cross bar and one end of the second cross bar, and the two ends of the other foldable vertical bar are respectively hingedly connected to the other end of the first cross bar and the other end of the second cross bar, and the foldable vertical bars have a supporting state and a folding state; the frame has an open state and a storage state, when in the open state, the two foldable vertical bars are both in the supporting state, and when switching from the open state to the storage state, the two foldable vertical bars are simultaneously switched from the supporting state to the folding state, and are folded synchronously by the front and rear brackets, so that other frame components are conveniently folded together, and the operation is simple.
[0004] However, the above-mentioned folding cart can only be folded in the length direction, but cannot be folded in the width direction. After being folded, it still occupies a certain storage space, and the folding space needs to be improved. Moreover, when unfolded for use, the frame sometimes collapses, and the stability of the cart is still insufficient. Utility Model Content
[0005] The utility model aims to provide a trolley with a limited position structure and easy to fold, so as to solve the problems in the prior art that the trolley cannot be folded in its width direction, still occupies a certain storage space after folding, and the frame collapses when the trolley is unfolded for use, thereby affecting the stability of the trolley.
[0006] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:
[0007] A cart with a limited position structure and easy to fold, comprises a frame, two groups of front wheel assemblies and two groups of rear wheel assemblies are respectively arranged under the frame, a handle assembly is arranged between the two groups of front wheel assemblies, the frame comprises four vertical poles, which are respectively fixed to the front and rear wheel assemblies, two side telescopic structures are arranged between the vertical poles on the front and rear wheel assemblies on the same side, the two side telescopic structures are correspondingly connected to support rods, a front telescopic structure is arranged between the vertical poles on the two groups of front wheel assemblies, a rear telescopic structure is arranged between the vertical poles on the two groups of rear wheel assemblies, two bottom telescopic structures are correspondingly arranged between the vertical poles and the support rods, the front telescopic structure, the rear telescopic structure and the side telescopic structure all comprise telescopic brackets with the same structure, and a limited position structure is arranged on the telescopic brackets.
[0008] Preferably, the telescopic bracket comprises two first folding rods and two second folding rods, one ends of the two first folding rods are rotatably connected to each other via a rotating member, and the other ends are movably connected to the vertical rods or support rods at corresponding positions, one ends of the two second folding rods are rotatably connected to each other via a rotating member, and the other ends are movably connected to the vertical rods or support rods at corresponding positions, the limiting structure comprises a sliding member and a limiting member, the limiting member is fixedly mounted on the second folding rod, and the limiting member is close to the connection between the two second folding rods, the sliding member is mounted on the second folding rod, and is movably connected to the first folding rod, and the top end of the sliding member cooperates with the bottom end of the limiting member.
[0009] Preferably, the top end of the sliding member and the bottom end of the limiting member are tightly fitted or fixed by snap connection.
[0010] Preferably, a first fixing member is provided at the top end of the above-mentioned vertical pole, a second fixing member is provided at the bottom end of the vertical pole on the front wheel assembly, a third fixing member is provided at the bottom end of the vertical pole on the rear wheel assembly, a fourth fixing member is provided at the top end of the support rod, a fifth fixing member is provided at the bottom end, and each fixing member is provided with a corresponding connecting groove.
[0011] Preferably, the handle assembly comprises a handle rod and two rotating rods, a sixth fixing member is provided at the bottom of the handle rod, two first limiting grooves are symmetrically provided on the sixth fixing member, a second limiting groove is provided on the second fixing member, one end of the rotating rod is rotatably connected to the first limiting groove, and the other end is connected to the second limiting groove via a connecting member.
[0012] Preferably, the second limiting groove comprises a square groove, a side of the square groove close to the sixth fixing member protrudes to form two limiting blocks, the connecting member comprises a first connecting end and a second connecting end, one end of the rotating rod is movably connected to the first connecting end, and the second connecting end is rotatably connected in the square groove and pressed tightly between the two limiting blocks.
[0013] Preferably, an auxiliary wheel assembly is detachably connected between the bottom end of the support rod and the fifth fixing member.
[0014] Preferably, the bottom telescopic structure comprises four square rods, one end of each of the four square rods is connected to the seventh fixing member, and the other end is movably connected to the vertical rods or support rods at corresponding positions to form a cross.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] (1) The utility model has a front, rear, left, right and bottom telescopic structure. The trolley can be folded in four directions: front, rear, left and right. The trolley can be folded by simply pulling up the bottom telescopic structure and then forcing the front and rear uprights on the same side to close inward. The operation is simple and the storage space after the trolley is folded can be further reduced.
[0017] (2) By providing a limiting structure on the telescopic bracket, when the frame is fully extended, the telescopic bracket will be more stable due to the design of the limiting structure, preventing the telescopic bracket from being excessively extended due to external force or excessively heavy loads, thereby preventing the frame from collapsing, thereby better improving the stability and safety of the frame. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the utility model in the expanded state;
[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;
[0020] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle B part;
[0021] Figure 4 It is a schematic diagram of the structure of the utility model in a folded state.
[0022] In the figure: 1-vertical pole; 2-supporting pole; 3-first folding pole; 4-second folding pole; 5-rotating member; 6-sliding member; 7-limiting member; 8-first fixing member; 9-second fixing member; 10-third fixing member; 11-fourth fixing member; 12-fifth fixing member; 13-handle rod; 14-rotating rod; 15-sixth fixing member; 16-connecting member; 17-square rod; 18-seventh fixing member; 19-auxiliary wheel assembly; 901-second limiting groove; 902-limiting block; 1501-first limiting groove. DETAILED DESCRIPTION
[0023] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0024] like Figure 1-4 As shown, a cart with a limited position structure and easy to fold includes a frame, two groups of front wheel assemblies and two groups of rear wheel assemblies are respectively arranged under the frame, a handle assembly is arranged between the two groups of front wheel assemblies, the frame includes four vertical poles 1, and are respectively fixed on the front and rear wheel assemblies, two side telescopic structures are arranged between the vertical poles 1 on the front and rear wheel assemblies on the same side, the two side telescopic structures are correspondingly connected to the support rods 2, a front telescopic structure is arranged between the vertical poles 1 on the two groups of front wheel assemblies, a rear telescopic structure is arranged between the vertical poles 1 on the two groups of rear wheel assemblies, two bottom telescopic structures are correspondingly arranged between the vertical poles 1 and the support rods 2, the front telescopic structure, the rear telescopic structure and the side telescopic structure all include telescopic brackets with the same structure, and a limited position structure is arranged on the telescopic brackets.
[0025] The trolley of the utility model has a simple structure. Through the design of the front, rear, left, right and bottom telescopic structures, it is only necessary to pull up the bottom telescopic structure and then forcefully fold the front and rear uprights 1 on the same side inward, thereby realizing the folding of the frame in four directions: front, rear, left and right. The operation is simple and the storage space of the trolley after folding is further reduced. At the same time, the design of the telescopic bracket with the same structure is convenient for processing and can also reduce the processing cost to a certain extent.
[0026] In particular, by arranging a limiting structure on the telescopic bracket, when the frame is fully unfolded, the telescopic bracket will be more stable due to the design of the limiting structure, preventing the telescopic bracket from being excessively unfolded due to external force or excessively heavy loads, thereby causing the frame to collapse, thereby better improving the stability and safety of the frame.
[0027] Furthermore, the telescopic bracket includes two first folding rods 3 and two second folding rods 4, one ends of the two first folding rods 3 are rotatably connected to each other through a rotating member 5, and the other ends are movably connected to the vertical rod 1 or the support rod 2 at the corresponding position, one ends of the two second folding rods 4 are rotatably connected to each other through a rotating member 5, and the other ends are movably connected to the vertical rod 1 or the support rod 2 at the corresponding position, the limiting structure includes a sliding member 6 and a limiting member 7, the limiting member 7 is fixedly mounted on the second folding rod 4, and the limiting member 7 is close to the connection between the two second folding rods 4, the sliding member 6 is mounted on the second folding rod 4, and is movably connected to the first folding rod 3, the top end of the sliding member 6 cooperates with the bottom end of the limiting member 7, and the top end of the sliding member 6 is tightly fitted with or clamped and fixed to the bottom end of the limiting member 7.
[0028] The telescopic bracket of the above structure is simple in structure, convenient in processing and installation, and highly efficient. Moreover, the cross-designed telescopic bracket can make the folding space of the two folding rods smaller, thereby reducing the storage volume of the cart. Through the design of the limiting structure, when the two folding rods are unfolded to each other, the sliding member 6 will slide to its top end to sleeve against the bottom end of the limiting member 7. At this time, the frame is fully unfolded. According to actual needs, the sliding member 6 and the limiting member 7 can be limited by tightening between the inner and outer walls, or accessories such as buckles can be added for detachable clamping and fixing, thereby improving the stability of the telescopic bracket, thereby preventing the two folding rods from being overly unfolded due to external force or load-bearing, thereby preventing the frame from collapsing, thereby better improving the stability and safety of the frame.
[0029] Furthermore, a first fixing member 8 is provided at the top of the vertical pole 1, a second fixing member 9 is provided at the bottom of the vertical pole 1 on the front wheel assembly, a third fixing member 10 is provided at the bottom of the vertical pole 1 on the rear wheel assembly, a fourth fixing member 11 is provided at the top of the support rod 2, a fifth fixing member 12 is provided at the bottom, and a connecting groove is provided on each fixing member. In the above design, the setting of each fixing member facilitates the stable connection between each telescopic structure and the vertical pole 1 or the support rod 2, thereby improving the stability of the frame.
[0030] Furthermore, the handle assembly includes a handle rod 13 and two rotating rods 14, a sixth fixing member 15 is provided at the bottom of the handle rod 13, two first limit grooves 1501 are symmetrically provided on the sixth fixing member 15, a second limit groove 901 is provided on the second fixing member 9, one end of the rotating rod 14 is rotatably connected to the first limit groove 1501, and the other end is connected to the second limit groove 901 through a connecting member 16, the second limit groove 901 includes a square groove, a side of the square groove close to the second fixing member 9 is raised to form two limit blocks 902, the connecting member 16 includes a first connecting end and a second connecting end, one end of the rotating rod 14 is movably connected to the first connecting end, the second connecting end is rotatably connected to the square groove, and is tightly pressed between the two limit blocks 902.
[0031] The handle assembly designed above requires a certain amount of force to rotate the connecting member 16 in the second limiting groove 901 through the matching design between the connecting member 16 and the second limiting groove 901, that is, there is a certain amount of pressing pressure between the two at the same time, so that the handle rod 13 will not fall down by itself when it is at a certain use angle. When the handle is folded, the rotating rod 14 can be vertically located in the first limiting groove 1501 and the first connecting end 1601, and is in a relatively parallel plane with the handle rod 13, thereby reducing the folded volume of the cart and improving the folded stability.
[0032] Furthermore, an auxiliary wheel assembly 19 can be detachably connected between the bottom end of the support rod 2 and the fifth fixing member 12. The detachable design of the auxiliary wheel assembly 19 allows the auxiliary wheel assembly 19 to be quickly installed to form a six-wheeled cart when it is needed to be used on a lawn, beach or other complex road conditions, which facilitates the stable use of the cart and is also convenient for independent storage when not in use, thereby improving the flexibility and effectiveness of the use of the cart.
[0033] It should be noted that, in the above design, the wheels of the front wheel assembly and the auxiliary wheel assembly 19 can be designed as universal wheels, which can make the cart smoother and more stable when used on complex terrain.
[0034] Furthermore, the bottom telescopic structure includes four square rods 17, one end of each of the four square rods 17 is connected to the seventh fixing member 18, and the other end is movably connected to the vertical rod 1 or the support rod 2 at the corresponding position to form a cross. The bottom telescopic structure of the above structure is simple in structure, easy to install, and has strong connection stability, which can improve the load-bearing stability of the trolley.
[0035] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. A foldable cart with a limited position structure, comprising a frame, two front wheel assemblies and two rear wheel assemblies are respectively arranged below the frame, a handle assembly is arranged between the two front wheel assemblies, and the characteristics are: The frame includes four vertical poles, which are respectively fixed on the front and rear wheel assemblies. Two side telescopic structures are arranged between the vertical poles on the front and rear wheel assemblies on the same side. The two side telescopic structures are correspondingly connected to the support rods. A front telescopic structure is arranged between the vertical poles on the two groups of the front wheel assemblies, and a rear telescopic structure is arranged between the vertical poles on the two groups of the rear wheel assemblies. Two bottom telescopic structures are correspondingly arranged between the vertical poles and the support rods. The front telescopic structure, the rear telescopic structure and the side telescopic structure all include telescopic brackets with the same structure, and a limiting structure is arranged on the telescopic bracket.
2. A foldable cart with a limited position structure according to claim 1, characterized in that: The telescopic bracket includes two first folding rods and two second folding rods, one ends of the two first folding rods are rotatably connected to each other through a rotating member, and the other ends are movably connected to the vertical rods or support rods at corresponding positions; one ends of the two second folding rods are rotatably connected to each other through a rotating member, and the other ends are movably connected to the vertical rods or support rods at corresponding positions; the limiting structure includes a sliding member and a limiting member, the limiting member is fixedly mounted on the second folding rods, and the limiting member is close to the connection between the two second folding rods, the sliding member is mounted on the second folding rod and is movably connected to the first folding rod, and the top end of the sliding member cooperates with the bottom end of the limiting member.
3. A foldable cart with a limited position structure according to claim 2, characterized in that: The top end of the sliding member is tightly matched or fixed with the bottom end of the limiting member.
4. A foldable cart with a limited position structure according to claim 2, characterized in that: A first fixing piece is arranged at the top end of the vertical pole, a second fixing piece is arranged at the bottom end of the vertical pole on the front wheel assembly, a third fixing piece is arranged at the bottom end of the vertical pole on the rear wheel assembly, a fourth fixing piece is arranged at the top end of the support rod, a fifth fixing piece is arranged at the bottom end, and each fixing piece is correspondingly provided with a connecting groove.
5. A foldable cart with a limited position structure according to claim 4, characterized in that: The handle assembly includes a handle rod and two rotating rods, a sixth fixing piece is arranged at the bottom of the handle rod, two first limiting grooves are symmetrically arranged on the sixth fixing piece, a second limiting groove is arranged on the second fixing piece, one end of the rotating rod is rotatably connected to the first limiting groove, and the other end is connected to the second limiting groove through a connecting piece.
6. A foldable cart with a limited position structure according to claim 5, characterized in that: The second limiting groove includes a square groove, and a protrusion on one side of the square groove close to the sixth fixing member forms two limiting blocks. The connecting member includes a first connecting end and a second connecting end. One end of the rotating rod is movably connected to the first connecting end, and the second connecting end is rotatably connected in the square groove and pressed tightly between the two limiting blocks.
7. A foldable cart with a limited position structure according to claim 4, characterized in that: An auxiliary wheel assembly is detachably connected between the bottom end of the support rod and the fifth fixing member.
8. The foldable cart with a limited position structure according to claim 1, characterized in that: The bottom telescopic structure includes four square rods, one end of the four square rods is respectively connected to the seventh fixing member, and the other end is movably connected to the vertical rod or the supporting rod at the corresponding position to form a cross.