Folding base frame capable of forming u-shaped storage space, and collapsible wagon

Abstract

A folding base frame capable of forming a U-shaped storage space, comprising a front frame portion (1), a rear frame portion (2), and two connecting seats arranged in bilateral symmetry, thus forming a double-folding base frame. When an upward force is applied to the middle of the base frame to lift and fold the base frame for storage, the front frame portion (1), the rear frame portion (2), and the connecting seats can form a U-shaped storage space (12) having an opening facing downward. The folding base frame can form the U-shaped storage space in a folded state. Also provided is a collapsible wagon using the base frame.

Description

A folding rack and folding cart capable of forming a U-shaped storage space Technical Field

[0001] This invention relates to the field of folding bicycle technology, specifically to a folding frame and folding bicycle capable of forming a U-shaped storage space. Background Technology

[0002] With the continuous development of handling technology and the rise of outdoor leisure activities, the demand for handling tools and outdoor products is increasing. One type of outdoor product is the folding vehicle. The folding vehicle is essentially a foldable and storable cargo vehicle. Its main function is to handle and carry goods, but it can also be folded down to reduce its size for easy storage.

[0003] The folding bike includes a base frame, which currently serves primarily as a bottom support surface and does not have a storage function. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a folding base frame that can form a U-shaped storage space, which can form a U-shaped storage space in the folded state; and also to provide a folding vehicle that adopts the aforementioned base frame.

[0005] To solve the above-mentioned technical problems, this invention proposes a folding frame capable of forming a U-shaped storage space, including a front frame, a rear frame, and two symmetrically arranged connecting seats. Outer and inner crossbeams are provided between the left and right side rods of the front frame, and between the left and right side rods of the rear frame. The front end of the left side rod of the front frame is hinged to the lower fixing seat at the lower end of the left corner column of the folding cart's front frame. The rear end of the left side rod of the front frame is hinged to the front end of the left connecting seat, and the rear end of the left connecting seat is hinged to the front end of the left side rod of the rear frame. The rear end of the left side rod of the rear frame is used to connect with the rear frame of the folding cart. The lower fixing seat is fixedly mounted at the lower end of the left corner column and hinged; the front end of the right side rod of the front frame is hinged to the lower fixing seat fixedly mounted at the lower end of the right corner column of the folding bike, the rear end of the right side rod of the front frame is hinged to the front end of the right connecting seat, the rear end of the right connecting seat is hinged to the front end of the right side rod of the rear frame, and the rear end of the right side rod of the rear frame is hinged to the lower fixing seat fixedly mounted at the lower end of the right corner column of the folding bike; thus forming a double-folding base frame; when the middle of the base frame is lifted upwards for storage and folding, the front frame, the rear frame and each connecting seat can form a U-shaped storage space with the opening facing downwards.

[0006] As an improvement, the size of the U-shaped storage space is set to accommodate the wheels of a folding bike.

[0007] As an improvement, both the left and right connecting seats adopt a downward-facing groove-shaped component with an inverted U-shaped cross-section. Both ends of the groove-shaped component are provided with limiting parts. When the base frame is unfolded, the limiting parts limit the upper sides of the left and right side rods of the front frame and the left and right side rods of the rear frame in the downward direction. Alternatively, both the left and right connecting seats adopt a downward-facing groove-shaped component with an inverted U-shaped cross-section. Both ends of the groove-shaped component are hinged to connectors. The connectors are fixedly connected to the corresponding side rods one by one. The connectors are also provided with limiting ends above the hinge shaft. When the base frame is unfolded, the two ends of the connecting seats limit the left and right side rods of the front frame and the left and right side rods of the rear frame in the horizontal direction through the limiting ends of the connectors.

[0008] As an improvement, a connecting rod is provided between the middle of the left connecting seat and the right connecting seat. The connecting rod connects the left connecting seat and the right connecting seat laterally. When the connecting rod is pulled upward, the left connecting seat and the right connecting seat are moved upward at the same time through the connecting rod so that the front frame and the rear frame fold together.

[0009] As an improvement, the Velcro strap on the bottom of the folding bike's pocket binds the inner crossbeams on the front and rear frames together, or a connecting rod is fixed between the left and right connecting seats laterally, with the Velcro strap connected to the connecting rod; a pull strap is set in the middle of the bottom inner side of the pocket, and when the pull strap is pulled upward, the pocket will drive the left and right connecting seats to move upward so that the front and rear frames fold together.

[0010] As an improvement, the outer and inner crossbeams are set to be of equal length, and the front ends of the left and right bars of the front frame are either straight or extended outwards, while the rear ends of the left and right bars of the rear frame are either straight or extended outwards.

[0011] As an improvement, a central strut is provided between the outer and inner crossbeams of the front frame and between the outer and inner crossbeams of the rear frame.

[0012] Compared with the prior art, the present invention has the following advantages after adopting the above structure: The present invention constrains the front frame, rear frame and the two connecting seats symmetrically arranged on the left and right, so that the front frame, rear frame and the two connecting seats constitute a double-folding base frame. The folding method is that when the middle of the base frame is lifted upward to store and fold, the front frame, rear frame and each connecting seat can form a U-shaped storage space with the opening facing downward. When moving downward, the base frame is unfolded.

[0013] The U-shaped storage space can store the accessories of the folding bike. In this way, other accessories such as instruction manuals can be hidden in the U-shaped storage space, further reducing the logistics volume and logistics costs. Attached Figure Description

[0014] Figure 1 is a three-dimensional schematic diagram of a folding base frame capable of forming a U-shaped storage space in the unfolded state.

[0015] Figure 2 is a three-dimensional schematic diagram of a folding base frame capable of forming a U-shaped storage space in the folded state.

[0016] Figure 3 is a three-dimensional schematic diagram of the unfolded state of a folding vehicle according to the present disclosure.

[0017] Figure 4 is a three-dimensional schematic diagram of the folding state of a folding vehicle disclosed herein.

[0018] Figure 5 is a three-dimensional schematic diagram of a folding vehicle of the present disclosure in its unfolded state after the cloth bag is installed, viewed from the top.

[0019] Figure 6 is a three-dimensional schematic diagram of a folding vehicle of the present disclosure in its unfolded state after the cloth bag is installed, viewed from the bottom.

[0020] Figure 7 is a top view of a folding vehicle with a connecting rod on the base frame in the unfolded state.

[0021] Figure 8 is a left-side view of a folding frame of a folding vehicle using a connector structure disclosed herein.

[0022] Figure 9 is an enlarged three-dimensional schematic diagram of A.

[0023] As shown in the diagram: 1. Front frame, 2. Rear frame, 3. Left side bar, 4. Right side bar, 5. Outer crossbeam, 6. Inner crossbeam, 7. Front frame, 8. Lower fixing seat, 9. Left connecting seat, 10. Rear frame, 11. Right connecting seat, 12. U-shaped storage space, 13. Wheel, 14. Limiting part, 15. Connector head, 16. Limiting end, 17. Connecting rod, 18. Cloth bag, 19. Pull strap, 20. Cable tie, 21. Front section, 22. Rear section, 23. Middle support rod, 24. Left side frame, 25. Right side frame, 26. Handle. Detailed Implementation

[0024] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The embodiments described below are merely examples, and other obvious variations will arise for those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0025] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0026] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0027] Figures 1 and 2 show a folding frame that can form a U-shaped storage space, as disclosed in this invention. Figures 3 to 9 show a folding vehicle using this folding frame. The folding frame includes a front frame 1, a rear frame 2, and two symmetrically arranged connecting seats. Outer crossbeams 5 and inner crossbeams 6 are provided between the left and right side rods 3 and 4 of the front frame 1, and between the left and right side rods 3 and 4 of the rear frame 2. The front end of the left side rod 3 of the front frame 1 is hinged to the lower fixing seat 8, which is fixed to the lower end of the left corner column of the folding vehicle's front frame 7. The rear end of the left side rod 3 of the front frame 1 is hinged to the front end of the left connecting seat 9. The rear end of the left connecting seat 9 is hinged to the front end of the left side rod 3 of the rear frame 2. The left side of the rear frame 2... The rear end of the side rod 3 is hinged to the lower fixing seat 8, which is fixedly set at the lower end of the left corner column of the rear frame 10 of the folding bike; the front end of the right side rod 4 of the front frame 1 is hinged to the lower fixing seat 8, which is fixedly set at the lower end of the right corner column of the front frame 7 of the folding bike; the rear end of the right side rod 4 of the front frame 1 is hinged to the front end of the right connecting seat 11; the rear end of the right connecting seat 11 is hinged to the front end of the right side rod 4 of the rear frame 2; and the rear end of the right side rod 4 of the rear frame 2 is hinged to the lower fixing seat 8, which is fixedly set at the lower end of the right corner column of the rear frame 10 of the folding bike; thus forming a double-folding base frame; when the middle of the base frame is lifted upwards for storage and folding, the front frame 1, the rear frame 2 and each connecting seat can form a U-shaped storage space 12 with the opening facing downwards.

[0028] As shown in Figures 2 and 4, by setting the left connecting seat 9 and the right connecting seat 11 to a certain length, the width of the U-shaped storage space 12 can be set to be sufficient to accommodate the wheels 13 of the folding bike. This can further reduce the volume of logistics.

[0029] In some embodiments, in order to provide support and positioning so that the folding base frame can achieve a better state in the unfolded state, as shown in Figures 1 and 2, the left connecting seat 9 and the right connecting seat 11 are both made of groove-shaped parts with an inverted U-shaped cross-section and downward opening. Both ends of the groove-shaped parts are provided with limiting parts 14. When the base frame is unfolded, the limiting parts 14 limit the upper sides of the left and right side rods 4 of the front frame 1 and the left and right side rods 4 of the rear frame 2 in the downward direction.

[0030] Of course, other structures are also possible. For example, as shown in Figures 8 and 9, both the left connecting seat 9 and the right connecting seat 11 are channel-shaped parts with an inverted U-shaped cross-section and downward opening. Both ends of the channel-shaped part are hinged to connecting heads 15. The connecting heads 15 are fixedly connected to the corresponding side rods one by one. This fixed connection can be achieved by riveting, screwing, or welding, for example. The connecting heads 15 can be made of stamped parts. A limiting end 16 is also provided above the hinge axis. When the base frame is unfolded, the limiting ends 16 at both ends of the connecting seat limit the left and right side rods 4 of the front frame 1 and the left and right side rods 4 of the rear frame 2 in the horizontal direction. In this way, it has a better supporting and positioning function, which is beneficial to help improve the leveling and supporting strength of the folding base frame.

[0031] In some embodiments, in order to increase the support and smooth movement of the left connecting seat 9 and the right connecting seat 11 during folding, as shown in FIG7, a connecting rod 17 is provided between the middle of the left connecting seat 9 and the right connecting seat 11. The connecting rod 17 connects the left connecting seat 9 and the right connecting seat 11 laterally. When the connecting rod 17 is pulled upward, the left connecting seat 9 and the right connecting seat 11 are simultaneously driven upward by the connecting rod 17 to make the front frame 1 and the rear frame 2 fold together.

[0032] Of course, there can be other structures. For example, as shown in Figures 5 and 6, the cloth bag 18 of the folding car connects the left connecting seat 9 and the right connecting seat 11 horizontally. The cloth bag 18 is equipped with a pull strap 19. When the pull strap 19 is pulled upward, the cloth bag 18 simultaneously drives the left connecting seat 9 and the right connecting seat 11 to move upward, so that the front frame 1 and the rear frame 2 fold together.

[0033] Furthermore, the Velcro straps 20 on the bottom of the folding bike's pocket 18 bind the inner crossbeams 6 on the inner sides of the front frame 1 and the rear frame 2 together, or a connecting rod 17 is fixed horizontally between the left connecting seat 9 and the right connecting seat 11, with the Velcro straps 20 connected to the connecting rod 17; a pull strap 19 is provided in the middle of the bottom inner side of the pocket 18. When the pull strap 19 is pulled upwards, the pocket 18 will cause the left connecting seat 9 and the right connecting seat 11 to move upwards, so that the front frame 1 and the rear frame 2 fold together. In this way, assembly is very convenient and manufacturing costs are low.

[0034] In some embodiments, to improve versatility and reduce manufacturing costs, as shown in Figures 1 and 2, the outer crossbeam 5 and the inner crossbeam 6 are set to be of equal length. Furthermore, the front sections 21 of the left side rod 3 and the right side rod 4 of the front frame 1 are either straight or extended outwards, and the rear sections 22 of the left side rod 3 and the right side rod 4 of the rear frame 2 are either straight or extended outwards. This allows for hinged connection with the lower fixing seat 8 of the front frame 7 and the rear frame 10, and also ensures that the outer crossbeam 5 and the inner crossbeam 6 are interchangeable, eliminating the need for additional molds or manufacturing tools.

[0035] In some embodiments, in order to increase the support density, as shown in Figures 1 and 2, one or more central support rods 23 are provided between the outer crossbeam 5 and the inner crossbeam 6 of the front frame portion 1 and between the outer crossbeam 5 and the inner crossbeam 6 of the rear frame portion 2.

[0036] As shown in Figures 3 and 4, this disclosure also discloses a folding vehicle using the aforementioned folding base frame, specifically including a front frame 7, a rear frame 10, a left side frame 24, a right side frame 25, and a base frame. The front frame 7, rear frame 10, left side frame 24, and right side frame 25 form the four sides of a rectangle or square, and the base frame serves as the bottom surface of the rectangle or square.

[0037] As shown in Figure 3, both the front frame 7 and the rear frame 10 adopt a U-shaped frame. The left and right side rods of the front frame 7 and the left and right side rods of the rear frame 10 serve as the four corner posts of the folding frame. The lower end of each of the four corner posts is equipped with a lower fixing seat 8.

[0038] When set as a U-shaped frame, the retractable handle 26 of the folding bike can also be placed in the U-shaped frame, as shown in Figure 4. The front frame 7 serves as the opening, while the front frame 1 serves as the bottom, forming a cavity to hold the handle 26.

[0039] As shown in Figure 3, both the left frame 24 and the right frame 25 are figure-eight shaped frame structures composed of double parallelograms.

[0040] As shown in Figures 2, 3, and 4, the left connecting seat 9 and the right connecting seat 11 are configured with a certain length. When the middle of the folding base is lifted upwards for storage and folding, the front frame 1, the rear frame 2, and each connecting seat can form a U-shaped storage space 12 with the opening facing downwards. At the same time, as shown in Figure 4, the front frame 7 and the rear frame 10 move inwards synchronously and move closer to each other. The front frame 7, the rear frame 10, the front frame 1, and the rear frame 2 are arranged in a parallel state from front to back. As can be seen from Figure 4, in the folded and parallel state, a compact rectangular fully folding frame is formed.

[0041] Preferably, the wheels 13 are detachable, and when storage is required, the detached wheels 13 can be stored in the U-shaped storage space 12. This solves the storage problem of the wheels 13 during product shipping and packaging, eliminating the need for additional volume to accommodate the wheels 13, thus enabling smaller size and reduced logistics costs.

[0042] Of course, if logistics costs are not an issue, the wheels 13 can be left intact. In this case, the U-shaped storage space 12 can also store product manuals, gifts, and other items such as easily damaged parts.

[0043] After manufacturing is completed, there are two options for logistics and sales: the first is that the cloth bag 18 is installed at the factory, and the second is that the user installs the cloth bag 18 after receiving the vehicle. In the first case, since the cloth bag 18 can also be folded along with the frame, the cloth bag 31 will not affect the folding and can still form a rectangular frame. In the second case, as shown in Figure 4, the folded rectangular frame can be packed into a cardboard box as a whole, and the cloth bag 18 can preferably be accommodated in the U-shaped storage space 12. After purchase, the user can simply take out the rectangular frame from the cardboard box, unfold it, and install the cloth bag 18, which is very compact and convenient.

[0044] In this example, the left frame 24 and the right frame 25 are folded structures composed of two parallelograms in a figure-eight shape. When folded, the left frame 24 and the right frame 25 fold in the front and rear directions as the front frame 7 and the rear frame 10 come together.

[0045] Of course, the left frame 24 and the right frame 25 can also be, for example, an X-shaped two-way cross tube frame structure, or an X-shaped three-way cross tube frame structure, or an X-shaped four-way cross tube frame structure, or other irregular cross tube frame structures, or other square frame structures. Any left frame 24 and right frame 25 that are applicable to this disclosure can be applied to this disclosure.

[0046] Of course, the front frame 7 and the rear frame 10 can also be other structures such as U-shaped frame structure, or H-shaped frame structure, or Grid-shaped frame structure. Any front frame 7 and rear frame 10 that are applicable to this disclosure can be applied to this disclosure.

[0047] As can be seen from the above, this disclosure provides a folding frame capable of forming a U-shaped storage space and a folding vehicle using the folding frame. Taking examples, when manufacturing a specific product, the length of each component can be determined by size matching optimization. After folding, a regular cuboid frame as shown in Figure 4 can be obtained. After unfolding, the unfolded state as shown in Figure 3 can be obtained. Alternatively, with the cloth bag 18 installed, the unfolded state as shown in Figures 5 and 6 can be obtained. The cloth bag 18 is located in the cuboid receiving frame formed by the front frame 7, rear frame 10, left side frame 24, right side frame 25, and folding frame.

[0048] When understanding this invention, the above structure can be understood in conjunction with other embodiments / figures if necessary, and will not be elaborated here.

[0049] The above description is merely an optional specific embodiment of the present invention. All equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the scope of this patent application.

Claims

1. A folding base frame capable of forming a U-shaped storage space, characterized in that, The frame includes a front frame (1), a rear frame (2), and two symmetrically arranged connecting seats. The front end of the left side rod (3) of the front frame (1) is hinged to the lower fixing seat (8) at the lower end of the left corner column of the folding bike, which is fixed to the front frame (7). The rear end of the left side rod (3) of the front frame (1) is hinged to the front end of the left connecting seat (9). The rear end of the left connecting seat (9) is hinged to the front end of the left side rod (3) of the rear frame (2). The rear end of the left side rod (3) of the rear frame (2) is hinged to the lower fixing seat (8) at the lower end of the left corner column of the folding bike. The front end of the right side rod (4) of the front frame (1) is hinged to the front end of the folding bike. The frame (7) is fixedly mounted on the lower fixed seat (8) at the lower end of the right corner column. The rear end of the right rod (4) of the front frame (1) is hinged to the front end of the right connecting seat (11). The rear end of the right connecting seat (11) is hinged to the front end of the right rod (4) of the rear frame (2). The rear end of the right rod (4) of the rear frame (2) is used to be hinged to the lower fixed seat (8) at the lower end of the right corner column of the rear frame (10) of the folding car. Thus, a double-folding base frame is formed. When the middle of the double-folding base frame is lifted upwards and folded, the front frame (1), the rear frame (2) and each connecting seat can form a U-shaped storage space (12) with the opening facing downwards.

2. The folding base frame capable of forming a U-shaped storage space according to claim 1, characterized in that, The size of the U-shaped storage space (12) is set to accommodate the wheels (13) of the folding car.

3. The folding base frame capable of forming a U-shaped storage space according to claim 1, characterized in that, Both the left connecting seat (9) and the right connecting seat (11) are made of groove-shaped parts with an inverted U-shaped cross section and an opening facing downwards. Both ends of the groove-shaped parts are provided with limiting parts (14). When the base frame is unfolded, the limiting parts (14) in the downward direction limit the upper side of the left and right side rods (4) of the front frame (1) and the left and right side rods (4) of the rear frame (2). Alternatively, both the left connecting seat (9) and the right connecting seat (11) are made of groove-shaped parts with an inverted U-shaped cross section and an opening facing downwards. Both ends of the groove-shaped parts are hinged to connecting heads (15). The connecting heads (15) are fixedly connected to the corresponding side rods one by one. The connecting heads (15) are also provided with limiting ends (16) above the hinge shaft. When the base frame is unfolded, the two ends of the connecting seats in the horizontal direction limit the left and right side rods (4) of the front frame (1) and the left and right side rods (4) of the rear frame (2) through the limiting ends (16) of the connecting heads (15).

4. The folding base frame capable of forming a U-shaped storage space according to claim 1, characterized in that, A connecting rod (17) is provided between the middle of the left connecting seat (9) and the right connecting seat (11). The connecting rod (17) connects the left connecting seat (9) and the right connecting seat (11) laterally. When the connecting rod (17) is pulled upward, the left connecting seat (9) and the right connecting seat (11) are simultaneously driven to move upward through the connecting rod (17) so that the front frame (1) and the rear frame (2) fold together.

5. The folding base frame capable of forming a U-shaped storage space according to claim 1, characterized in that, An outer crossbeam (5) and an inner crossbeam (6) are provided between the left side bar (3) and the right side bar (4) of the front frame (1) and between the left side bar (3) and the right side bar (4) of the rear frame (2). According to claim 5, the folding frame capable of forming a U-shaped storage space is characterized in that the Velcro strap (20) on the bottom surface of the folding cart's cloth pocket (18) binds the inner crossbeams (6) on the inner side of the front frame (1) and the rear frame (2) together, or a connecting rod (17) is fixedly provided between the left connecting seat (9) and the right connecting seat (11) in the lateral direction, and the Velcro strap (20) is connected to the connecting rod (17); a pull strap (19) is provided in the middle of the bottom surface of the inner side of the cloth pocket (18), and when the pull strap (19) is pulled upward, the cloth pocket (18) will drive the left connecting seat (9) and the right connecting seat (11) to move upward so that the front frame (1) and the rear frame (2) fold together.

6. The folding base frame capable of forming a U-shaped storage space according to claim 5, characterized in that, The outer crossbeam (5) and the inner crossbeam (6) are set to be of equal length. Furthermore, the front sections (21) of the left side rod (3) and the right side rod (4) of the front frame (1) are straight sections or extended outwards, and the rear sections (22) of the left side rod (3) and the right side rod (4) of the rear frame (2) are straight sections or extended outwards.

7. The folding base frame capable of forming a U-shaped storage space according to claim 5, characterized in that, A middle support rod (23) is provided between the outer crossbeam (5) and the inner crossbeam (6) of the front frame (1) and between the outer crossbeam (5) and the inner crossbeam (6) of the rear frame (2).

8. A folding bicycle, comprising a front frame (7), a rear frame (10), a left side frame (24), a right side frame (25), and a base frame, wherein the front frame (7), rear frame (10), left side frame (24), and right side frame (25) form four sides of a rectangle or square, and the base frame serves as the base of the rectangle or square, characterized in that, The base frame described herein is the base frame described in any one of claims 1 to 7.

9. The folding vehicle according to claim 9, characterized in that, The left side frame (24) and the right side frame (25) adopt a figure-eight frame structure composed of double parallelograms and / or an X-shaped two-cross tube frame structure and / or an X-shaped three-cross tube frame structure and / or an X-shaped four-cross tube frame structure and / or a cross tube frame structure and / or a square frame.

10. The folding vehicle according to claim 9, characterized in that, The front frame (7) and rear frame (10) adopt a square frame and / or a U-shaped frame structure and / or a sun-shaped frame structure and / or a grid-shaped frame structure.

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