Folding bicycle

Abstract

The utility model discloses a folding bicycle which comprises a bicycle frame, and the bicycle frame comprises a folding bottom frame assembly capable of being folded upwards, four stand columns vertically distributed on the periphery of the folding bottom frame assembly respectively, two first folding side frame assemblies stretching out and drawing back in the length direction of the folding bicycle and two second folding side frame assemblies stretching out and drawing back in the width direction of the folding bicycle. The four stand columns are arranged at intervals in a rectangular shape, the lower end of each stand column is provided with a bottom frame support hinged to the folding bottom frame assembly, and the upper end of each stand column is provided with a connecting assembly used for being hinged to the first folding side frame assembly and the second folding side frame assembly which are adjacently distributed. The two first folding side frame assemblies, the two second folding side frame assemblies and the folding bottom frame assembly jointly define a containing space. The connecting assembly comprises an upper sliding seat, a fixed seat and a lower sliding seat which are sequentially arranged on the stand column from top to bottom. The folding bicycle has better integral rigid strength, is not easy to deform when being unfolded for use, and is convenient to quickly unfold or fold for storage.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation tools, in particular to a folding vehicle. Background Art

[0002] At present, in daily life such as outdoor picnics and camping, it is often necessary to carry items such as luggage, packages, and tools. Generally, a trolley is used for carrying. In order to facilitate storage and not occupy a large space when not in use, a relatively common practice is to make the trolley into a foldable structure. For example, an outdoor folding camping cart disclosed in Chinese Utility Model Patent CN216401468U is composed of foldable left and right side rails, front and rear side rails, and a bottom I-shaped component spliced together. However, the structure of this camping cart only realizes the guiding connection on the vertical pipe through a sliding-mounted connecting piece, which is not conducive to quickly unfolding or folding the camping cart; in addition, after the camping cart structure is unfolded, due to the long left and right side rails and the lack of a reinforcement structure connecting to the bottom I-shaped component below, the overall structural rigidity of the camping cart is insufficient, prone to deformation, and thus prone to tipping over. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a folding vehicle, which solves the problems that the traditional folding vehicle is not convenient for quickly unfolding or folding and storing, and the overall vehicle rigidity is insufficient after unfolding.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A folding vehicle includes a vehicle frame, and the vehicle frame includes a folding bottom frame assembly that can be folded upward, four columns vertically distributed around the folding bottom frame assembly, two first folding side frame assemblies that can be telescoped along the length direction of the folding vehicle, and two second folding side frame assemblies that can be telescoped along the width direction of the folding vehicle; the four columns are arranged at intervals in a rectangle, and the lower end of each column is provided with a bottom frame support hinged to the folding bottom frame assembly, and the upper end of each column is provided with a connection assembly for hinging the adjacent first folding side frame assembly and the second folding side frame assembly; the two first folding side frame assemblies, the two second folding side frame assemblies and the folding bottom frame assembly jointly enclose a storage space; the connection assembly includes an upper sliding seat, a fixed seat and a lower sliding seat sequentially arranged on the column from top to bottom, the upper sliding seat and the lower sliding seat are respectively slidably connected to the column, the fixed seat is fixedly connected to the column and is located between the upper sliding seat and the lower sliding seat, and the upper sliding seat and the lower sliding seat are respectively hinged to the free ends of the adjacent first folding side frame assembly and the second folding side frame assembly.

[0006] Furthermore, the first folding side frame assembly includes a plurality of first hinge frames sequentially and cross-hinged to each other. Each first hinge frame includes two first folding rods distributed in an X shape. The middle parts of the two first folding rods are hinged. The free ends of the first folding rods on adjacent first hinge frames are hinged to each other in a one-to-one correspondence. The two first folding rods on the first hinge frame near the free end of the first folding side frame assembly are respectively hinged to the upper sliding seat and the lower sliding seat on the corresponding column. One of the first folding rods on the first hinge frame near the free end of the first folding side frame assembly is hinged with a first connecting rod, and the free end of the first connecting rod is hinged to the fixed seat.

[0007] Furthermore, reinforcing rods are hinged to the middle parts of both first folding side frame assemblies. The ends of the reinforcing rods far from the first folding side frame assemblies are hinged to the folding bottom frame assembly.

[0008] Furthermore, two second connecting rods are hinged to the two first folding rods on the two first hinge frames near the middle of the first folding side frame assembly. The two second connecting rods are arranged in parallel with the other two first folding rods on the two first hinge frames near the middle of the first folding side frame assembly. The middle part of the second connecting rod is hinged to the upper end of the reinforcing rod on the same side.

[0009] Preferably, the first folding side frame assembly is provided with four first hinge frames.

[0010] Furthermore, the second folding side frame assembly includes a plurality of second hinge frames sequentially and cross-hinged to each other. Each second hinge frame includes two second folding rods distributed in an X shape. The middle parts of the two second folding rods are hinged. The free ends of the second folding rods on adjacent second hinge frames are hinged to each other in a one-to-one correspondence. The two second folding rods on the second hinge frame near the free end of the second folding side frame assembly are respectively hinged to the upper sliding seat and the lower sliding seat on the corresponding column.

[0011] Preferably, the second folding side frame assembly is provided with two second hinge frames.

[0012] Furthermore, the folding bottom frame assembly includes a first hinge base, a second hinge base, a third hinge base, a fourth hinge base, four first support rods, and four second support rods. The third hinge base and the fourth hinge base are respectively hinged to the lower ends of the reinforcing rods on the same side. One of the first support rods is hinged to each of the third hinge base, the fourth hinge base, and the bottom frame supports on the two columns on one side. The four first support rods are all hinged to the first hinge base. One of the second support rods is hinged to each of the third hinge base, the fourth hinge base, and the bottom frame supports on the two columns on the other side. The four second support rods are all hinged to the second hinge base.

[0013] Further, the first hinge base and the second hinge base are both provided with an X-shaped hinge groove with an opening facing downward, and the third hinge base and the fourth hinge base are both provided with a V-shaped hinge groove with an opening facing upward.

[0014] Further, a wheel assembly is provided at the bottom of each column. The wheel assembly includes a wheel frame and a wheel. The wheel is rotatably connected to the wheel frame, and the upper part of the wheel frame is rotatably connected to the column.

[0015] Further, the vehicle frame is connected with a handlebar assembly. The handlebar assembly includes a handle and a pull rod. The handle is arranged at the upper part of the pull rod, and the lower part of the pull rod is connected to the vehicle frame.

[0016] Further, the vehicle frame is covered with a net bag, and the net bag extends into the storage space.

[0017] Compared with the prior art, the present utility model provides a folding vehicle, which has the following beneficial effects:

[0018] When the folding vehicle of the present utility model is in a folded state, the four columns gather together, and the folding chassis assembly folds upward and is stored in the space between the four columns, so that the overall size of the folding vehicle can be effectively reduced, which is convenient for carrying and storage. When the folding vehicle is in a fully unfolded state, the two first folding side frame assemblies, the two second folding side frame assemblies and the folding chassis assembly jointly enclose a storage space, which can be used to place items; since during the process of unfolding the folding vehicle, as the first folding side frame assembly and the second folding side frame assembly extend and unfold, the upper sliding seat and the lower sliding seat slide along the column in the upper and lower directions respectively, which is convenient for quick unfolding or folding and storage; at the same time, since the fixed seat is fixedly connected to the column, when the folding vehicle is unfolded or stored, under the linkage action of the first connecting rod, a balanced thrust or pull force can be generated on the column, and the folding vehicle has better rigid strength when in a fully unfolded state. In addition, since a reinforcing rod with a rigid connection is provided between the first folding side frame assembly and the folding chassis assembly, the first folding side frame assembly is not easily deformed after being fully extended, which greatly improves the overall rigid strength of the folding vehicle. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model in an open state;

[0021] Figure 2 The top view of the present utility model in the open state;

[0022] Figure 3 The front view of the present utility model in the open state;

[0023] Figure 4 The right view of the present utility model in the open state;

[0024] Figure 5 The schematic diagram of the downward-slanting structure of the present utility model in the open state;

[0025] Figure 6 The schematic diagram of the upward-slanting structure of the present utility model in the open state;

[0026] Figure 7 The three-dimensional structure schematic diagram of the present utility model in the folded and stored state.

[0027] Reference numerals: 100, vehicle frame; 1, folding bottom frame assembly; 11, first hinge base; 12, second hinge base; 13, third hinge base; 14, fourth hinge base; 15, first support rod; 16, second support rod; 17, X-shaped hinge groove; 18, V-shaped hinge groove; 2, column; 21, bottom frame support; 22, connection assembly; 221, upper sliding seat; 222, fixed seat; 223, lower sliding seat; 3, first folding side frame assembly; 31, first hinge frame; 311, first folding rod; 32, first connecting rod; 33, second connecting rod; 4, second folding side frame assembly; 41, second hinge frame; 411, second folding rod; 5, strengthening rod; 6, wheel assembly; 61, wheel frame; 62, wheel. Detailed implementation manners

[0028] The technical solutions of the present utility model will be clearly and completely described below through detailed embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1 to 7, this embodiment provides a folding bike, including a frame 100. The frame 100 includes a folding bottom frame assembly 1 that can be folded upward, four columns 2 vertically distributed around the folding bottom frame assembly 1, two first folding side frame assemblies 3 that can be telescoped along the length direction of the folding bike, and two second folding side frame assemblies 4 that can be telescoped along the width direction of the folding bike; the four columns 2 are arranged at rectangular intervals, and a bottom frame support 21 hinged to the folding bottom frame assembly 1 is provided at the lower end of each column 2, and a connecting component 22 for hinging the adjacent first folding side frame assemblies 3 and second folding side frame assemblies 4 is provided at the upper end of each column 2. The two first folding side frame assemblies 3, the two second folding side frame assemblies 4 and the folding bottom frame assembly 1 together enclose a storage space for placing items. When the folding bike is in a folded state, the four columns gather together, and the folding bottom frame assembly folds upward and is stored in the space between the four columns, so that the overall size of the folding bike can be effectively reduced, which is convenient for carrying and storage. When the folding bike is in a fully unfolded state, the two first folding side frame assemblies, the two second folding side frame assemblies and the folding bottom frame assembly together enclose a storage space, which can be used to place items.

[0030] Reference Figure 1 , Figure 3 , Figure 4 and Figure 7 , in some specific embodiments, the connecting component 22 includes an upper sliding seat 221, a fixed seat 222 and a lower sliding seat 223 that are sequentially arranged on the column 2 from top to bottom. The upper sliding seat 221 and the lower sliding seat 223 are respectively slidably connected to the column 2. The fixed seat 222 is fixedly connected to the column 2 and is located between the upper sliding seat 221 and the lower sliding seat 223. The upper sliding seat 221 and the lower sliding seat 223 are respectively hinged to the free ends of the adjacent first folding side frame assemblies 3 and second folding side frame assemblies 4. The fixed seat plays a role in limiting the upper sliding seat and the lower sliding seat. In this way, during the process of unfolding the folding bike, as the first folding side frame assembly and the second folding side frame assembly extend and unfold, the upper sliding seat and the lower sliding seat slide upward and downward along the column respectively, which is convenient for quick unfolding or folding and storage.

[0031] Reference Figure 1 and Figure 3, in some specific embodiments, the first folding side frame assembly 3 includes four first hinge frames 31 that are sequentially cross-hinged. The first hinge frame 31 includes two first folding rods 311 distributed in an X shape. The middle parts of the two first folding rods 311 are hinged. The free ends of the first folding rods 311 on adjacent two first hinge frames 31 are hinged in one-to-one correspondence. The two first folding rods 311 on the first hinge frame 31 near the free end of the first folding side frame assembly 3 are respectively hinged to the upper sliding seat 221 and the lower sliding seat 223 on the corresponding upright column 2. One of the first folding rods 311 on the first hinge frame 31 near the free end of the first folding side frame assembly 3 is hinged with a first connecting rod 32. The free end of the first connecting rod 32 is hinged to the fixed seat 222. Using multiple X-shaped first hinge frames to splicingly form the first folding side frame assembly 3 can facilitate elongation or contraction along the length direction of the folding cart. The fixed seat is fixedly connected to the upright column, while the upper sliding seat and the lower sliding seat respectively distributed on the upper and lower sides of the fixed seat are slidably connected to the upright column. By using the connecting assembly of "upper sliding seat + fixed seat + lower sliding seat" to be hinged with the first folding side frame assembly, when the folding cart is unfolded or stored, under the linkage action of the first connecting rod, an equalized thrust or pulling force can be generated on the upright column, and the folding cart has better rigid strength when in the fully unfolded state.

[0032] As a preferred embodiment, the first connecting rod 32 and the other first folding rod 311 on the first hinge frame 31 near the free end of the first folding side frame assembly 3 are arranged in parallel. In this way, it is more conducive to quick unfolding or folding and storing, and has good stability and rigid strength.

[0033] As an improved embodiment, referring to Figure 1 , Figure 3 , Figures 5 to 7 , reinforcing rods 5 are hinged to the middle parts of the two first folding side frame assemblies 3. The end of the reinforcing rod 5 far from the first folding side frame assembly 3 is hinged to the folding bottom frame assembly 1. Since a rigidly connected reinforcing rod is provided between the first folding side frame assembly and the folding bottom frame assembly, the first folding side frame assembly is not easily deformed after being fully extended, greatly improving the overall rigid strength of the folding cart.

[0034] More specifically, as Figure 3As shown, two first folding rods 311 on two first hinge frames 31 near the middle of the first folding side frame assembly 3 are hinged with a second connecting rod 33. The second connecting rod 33 and the other two first folding rods 311 on two first hinge frames 31 near the middle of the first folding side frame assembly 3 are arranged in parallel. The middle of the second connecting rod 33 is hinged with the upper end of the reinforcing rod 5 on the same side. By arranging the second connecting rod, it is convenient to be hinged with the reinforcing rod. Furthermore, the second connecting rod can be used to maintain the connection between the first folding side frame assembly and the folding bottom frame assembly, and during the folding and storage process, the second connecting rod can be used to push down both sides of the folding bottom frame assembly, so that the folding bottom frame assembly can be folded upward. By arranging the second connecting rod to be parallel to the other two first folding rods on the middle two first hinge frames, the linkage effect of the parallelogram can be utilized to smoothly carry out the unfolding or folding and storage.

[0035] Reference Figure 1 and Figure 4 , in some specific embodiments, the second folding side frame assembly 4 includes two second hinge frames 41 that are sequentially cross-hinged. The second hinge frame 41 includes two second folding rods 411 distributed in an X shape. The middle parts of the two second folding rods 411 are hinged. The free ends of the second folding rods 411 on adjacent two second hinge frames 41 are correspondingly hinged. The two second folding rods 411 on the second hinge frame 41 near the free end of the second folding side frame assembly 4 are respectively hinged with the upper sliding seat 221 and the lower sliding seat 223 on the corresponding upright column 2. In this way, during the process of unfolding or folding and storing the folding cart, the second folding side frame assembly can be synchronously unfolded or folded along with the sliding of the upper sliding seat and the lower sliding seat. Moreover, by using a plurality of X-shaped second hinge frames to splicing form the second folding side frame assembly 4, it is also convenient to elongate or contract along the width direction of the folding cart.

[0036] Reference Figure 1 、 Figure 2 、 Figure 5 and Figure 6, in some specific embodiments, the folding chassis assembly 1 includes a first hinge base 11, a second hinge base 12, a third hinge base 13, a fourth hinge base 14, four first support rods 15 and four second support rods 16. The third hinge base 13 and the fourth hinge base 14 are respectively hinged to the lower ends of the reinforcing rods 5 on the same side. One of the first support rods 15 is hinged to each of the third hinge base 13, the fourth hinge base 14 and the chassis supports 21 on two columns 2 on one side. The four first support rods 15 are all hinged to the first hinge base 11. One of the second support rods 16 is hinged to each of the third hinge base 13, the fourth hinge base 14 and the chassis supports 21 on two columns 2 on the other side. The four second support rods 16 are all hinged to the second hinge base 12. Due to the constraint of the first hinge base, the four first support rods can only rotate upward from the horizontal state to the vertical state or downward from the vertical state to the horizontal state with the third hinge base, the fourth hinge base and the chassis supports on two columns on one side as the rotation centers. Similarly, due to the constraint of the second hinge base, the four second support rods can also only rotate upward from the horizontal state to the vertical state or downward from the vertical state to the horizontal state with the third hinge base, the fourth hinge base and the chassis supports on two columns on the other side as the rotation centers. Thus, during the folding and storage process, both the first hinge base and the second hinge base will be pushed upward, so that the space occupied by the folding chassis assembly after folding can be minimized as much as possible.

[0037] More specifically, as Figure 5 and Figure 6 shown, the first hinge base 11 and the second hinge base 12 are both provided with downward-opening X-shaped hinge grooves 17, and the third hinge base 13 and the fourth hinge base 14 are both provided with upward-opening V-shaped hinge grooves 18. Thus, the downward-opening X-shaped hinge grooves can limit the first support rods and the second support rods and prevent them from continuing to rotate downward, and the upward-opening V-shaped hinge grooves can support the first support rods and the second support rods and prevent them from continuing to rotate downward, so that the unfolded folding chassis assembly has better rigid strength and is convenient for bearing and loading items.

[0038] Referring to Figures 1 to 7 , in some specific embodiments, a wheel assembly 6 is provided at the bottom of each column 2. The wheel assembly 6 includes a wheel frame 61 and a wheel 62. The wheel 62 is rotatably connected to the wheel frame 61, and the upper part of the wheel frame 61 is rotatably connected to the column 2. Thus, it is convenient to push the folding cart to carry items.

[0039] In some specific embodiments, the frame 100 is connected with a handlebar assembly, which includes a handle and a pull rod. The handle is arranged on the upper part of the pull rod, and the lower part of the pull rod is connected with the frame 100. In this way, by pushing or pulling the handlebar assembly, the folding bicycle can be easily moved.

[0040] In some specific embodiments, the frame 100 is covered with a mesh pocket, and the mesh pocket extends into the storage space. By adding the mesh pocket, the items placed in the storage space on the frame are not easily dropped. As an example, the mesh pocket can be made of materials such as cloth, mesh cover, leather, etc., so as to form a storage space for placing items.

[0041] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0042] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A folding bicycle, comprising a frame, characterized in that: The bicycle frame includes a foldable chassis assembly that can be folded upward, four columns vertically distributed around the foldable chassis assembly, two first foldable side frame assemblies that can be extended and retracted along the length direction of the foldable bicycle, and two second foldable side frame assemblies that can be extended and retracted along the width direction of the foldable bicycle; the four columns are arranged in a rectangular interval, and the lower end of each column is provided with a chassis support hinged to the foldable chassis assembly, and the upper end of each column is provided with a connecting assembly for hingedly connecting the adjacent first foldable side frame assembly and the second foldable side frame assembly, and the two first foldable side frame assemblies, the two second foldable side frame assemblies and the foldable chassis assembly together form a storage space; the connecting assembly includes an upper slide seat, a fixed seat and a lower slide seat that are sequentially arranged on the columns from top to bottom, and the upper slide seat and the lower slide seat are respectively slidably connected to the columns, the fixed seat is fixedly connected to the columns and is located between the upper slide seat and the lower slide seat, and the upper slide seat and the lower slide seat are respectively hinged to the free ends of the adjacent first foldable side frame assemblies and the second foldable side frame assemblies.

2. The folding bicycle according to claim 1, characterized in that: The first folding side frame assembly includes a plurality of first articulated frames that are cross-hinged and connected in sequence, the first articulated frame includes two first folding rods distributed in an X shape, the middle parts of the two first folding rods are hinged, the free ends of the first folding rods on two adjacent first articulated frames are hinged one by one, the two first folding rods on the first articulated frame near the free end of the first folding side frame assembly are respectively hinged to the upper sliding seat and the lower sliding seat on the corresponding column, one of the first folding rods on the first articulated frame near the free end of the first folding side frame assembly is hingedly provided with a first connecting rod, and the free end of the first connecting rod is hinged to the fixed seat.

3. The folding bicycle according to claim 2, characterized in that: A reinforcing rod is hingedly connected to the middle of the two first folding side frame assemblies, and the reinforcing rod is hingedly connected to the folding bottom frame assembly at one end away from the first folding side frame assembly.

4. The folding vehicle according to claim 3, characterized in that: The two first folding rods on the two first articulated frames near the middle of the first folding side frame assembly are hinged with a second connecting rod, and the second connecting rod is arranged in parallel with the other two first folding rods on the two first articulated frames near the middle of the first folding side frame assembly, and the middle part of the second connecting rod is hinged to the upper end of the reinforcing rod located on the same side.

5. The folding bicycle according to claim 1, characterized in that: The second folding side frame assembly includes a plurality of second articulated frames that are cross-hinged and connected in sequence, and the second articulated frame includes two second folding rods distributed in an X shape, the middle parts of the two second folding rods are hinged, and the free ends of the second folding rods on two adjacent second articulated frames are hinged one by one, and the two second folding rods on the second articulated frames near the free ends of the second folding side frame assembly are respectively hinged to the upper sliding seat and the lower sliding seat on the corresponding column.

6. The folding bicycle according to claim 1, characterized in that: The folding base frame assembly includes a first articulated base, a second articulated base, a third articulated base, a fourth articulated base, four first support rods and four second support rods, the third articulated base and the fourth articulated base are respectively articulated to the lower ends of the reinforcing rods on the same side; the third articulated base, the fourth articulated base and the base frame supports on the two columns on one side are all articulated with one of the first support rods, and the four first support rods are all articulated to the first articulated base; the third articulated base, the fourth articulated base and the base frame supports on the two columns on the other side are all articulated with one of the second support rods, and the four second support rods are all articulated to the second articulated base.

7. The folding vehicle according to claim 6, characterized in that: The first hinged base and the second hinged base are both provided with an X-shaped hinged groove with an opening facing downward, and the third hinged base and the fourth hinged base are both provided with a V-shaped hinged groove with an opening facing upward.

8. The folding vehicle according to any one of claims 1 to 7, characterized in that: A wheel assembly is provided at the bottom of each column. The wheel assembly comprises a wheel frame and a wheel. The wheel is rotatably connected to the wheel frame. The upper part of the wheel frame is rotatably connected to the column.

9. The folding vehicle according to any one of claims 1 to 7, characterized in that: The frame is connected with a handlebar assembly, and the handlebar assembly comprises a handle and a pull rod. The handle is arranged on the upper part of the pull rod, and the lower part of the pull rod is connected to the frame.

10. The folding vehicle according to any one of claims 1 to 7, characterized in that: The frame is covered with a net bag, and the net bag extends into the storage space.

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