Folding chassis capable of forming U-shaped storage space and folding bicycle

Abstract

The utility model provides a folding chassis capable of forming a U-shaped storage space, which comprises a front frame part (1), a rear frame part (2) and two connecting seats arranged in bilateral symmetry, so that a double-folding folding folding chassis is formed, and when force is applied to the middle part of the chassis, the folding chassis is lifted upwards to be stored and folded, and the U-shaped storage space is formed. The front frame part (1), the rear frame part (2) and the connecting seats can form a U-shaped storage space (12) with a downward opening, and the folding underframe can form a U-shaped storage space in a folded state; the utility model further provides a folding bicycle which adopts the underframe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of folding bicycle, specifically is a kind of to fold bottom frame and folding bicycle capable of forming U-shaped storage space. BACKGROUND

[0002] With the continuous development of handling technology and the rise of outdoor leisure activities, the demand for handling tools and outdoor supplies is also increasing, one of which is a folding bicycle. The folding bicycle is essentially a foldable storage carrier, and its main function is to transport and carry objects. However, when it is stored, it can be folded to reduce its size for easy storage.

[0003] The folding bicycle includes a bottom frame, which is currently used as a bottom support surface and does not have a storage function. SUMMARY

[0004] The utility model solves the technical problem of overcoming the defects of the prior art and provides a folding bottom frame that can form a U-shaped storage space and a folding bicycle that uses the aforementioned bottom frame.

[0005] To solve the above technical problems, the utility model provides a folding bottom frame that can form a U-shaped storage space, including a front frame, a rear frame, and two symmetrical connection seats. The horizontal direction between the left and right sides of the front frame and the horizontal direction between the left and right sides of the rear frame are both equipped with outer cross beams and inner cross beams. The front end of the left side of the front frame is hinged to the lower fixed seat at the lower end of the left corner column of the front frame of the folding bicycle. The rear end of the left side of the front frame is hinged to the front end of the left connection seat. The rear end of the left connection seat is hinged to the front end of the left side of the rear frame. The rear end of the left side of the rear frame is hinged to the lower fixed seat at the lower end of the left corner column of the rear frame of the folding bicycle. The front end of the right side of the front frame is hinged to the lower fixed seat at the lower end of the right corner column of the front frame of the folding bicycle. The rear end of the right side of the front frame is hinged to the front end of the right connection seat. The rear end of the right connection seat is hinged to the front end of the right side of the rear frame. The rear end of the right side of the rear frame is hinged to the lower fixed seat at the lower end of the right corner column of the rear frame of the folding bicycle. Thus, a double-fold folding folding bottom frame is formed. When the middle part of the bottom frame is forced upward to fold, the front frame, the rear frame, and the connection seats can form a U-shaped storage space with the opening facing downward.

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

[0007] As an improvement, the left connecting seat and the right connecting seat are both downward-opening groove-shaped members with inverted U-shaped cross sections, and the two ends of the groove-shaped members are provided with limiting portions, which limit the upper sides of the left and right side rods of the front frame part and the left and right side rods of the rear frame part in the downward direction when the chassis is unfolded; or the left connecting seat and the right connecting seat are both downward-opening groove-shaped members with inverted U-shaped cross sections, and the two ends of the groove-shaped members are hingedly connected with connecting heads, and the connecting heads are fixedly connected with the corresponding side rods one by one, and the connecting heads are further provided with limiting ends above the hinge shafts, and the two ends of the connecting seat limit the left and right side rods of the front frame part and the left and right side rods of the rear frame part in the horizontal direction through the limiting ends of the connecting heads when the chassis is in the unfolded state.

[0008] As an improvement, a connecting rod is arranged between the middle portions of the left connecting seat and the right connecting seat, and the connecting rod transversely connects the left connecting seat and the right connecting seat together, and when the connecting rod is pulled upward, the left connecting seat and the right connecting seat are simultaneously moved upward by the connecting rod to fold the front frame part and the rear frame part relative to each other.

[0009] As an improvement, a magic tape tie is arranged on the bottom surface of the bag to tie the inner transverse beams on the inner sides of the front frame part and the rear frame part together, or a connecting rod is fixedly arranged between the left connecting seat and the right connecting seat in the transverse direction, and the magic tape tie is connected with the connecting rod; a pulling belt is arranged in the middle portion of the inner side of the bag, and when the pulling belt is pulled upward, the bag drives the left connecting seat and the right connecting seat to move upward to fold the front frame part and the rear frame part relative to each other.

[0010] As an improvement, the outer transverse beam and the inner transverse beam are arranged to be equal in length, and the front ends of the left side rod and the right side rod of the front frame part are straight sections or are arranged to be outwardly expanded, and the rear ends of the left side rod and the right side rod of the rear frame part are straight sections or are arranged to be outwardly expanded.

[0011] As an improvement, a middle support rod is arranged between the outer transverse beam and the inner transverse beam of the front frame part and between the outer transverse beam and the inner transverse beam of the rear frame part.

[0012] After the above structure is adopted, compared with the prior art, the utility model has the following advantages: the front frame part and the rear frame part in the disclosure and the two connecting seats constitute a double-folded folding bottom chassis through the constraint of the two left-right symmetrical connecting seats, and the folding mode is that when the middle portion of the chassis is forced to be lifted upward for storage and folding, the front frame part, the rear frame part and the connecting seats can constitute an inverted U-shaped storage space, and when moving downward, the chassis is unfolded.

[0013] The U-shaped storage space can store the accessories of the folding vehicle, so that other accessories such as the instruction manual are hidden in the U-shaped storage space, further reducing the logistics volume and reducing the logistics cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1A perspective view of a folded bottom frame of a folding vehicle in an unfolded state.

[0015] Figure 2 A perspective view of a folded bottom frame of a folding vehicle in a folded state.

[0016] Figure 3 A perspective view of a folding vehicle in an unfolded state.

[0017] Figure 4 A perspective view of a folding vehicle in a folded state.

[0018] Figure 5 A perspective view of a folding vehicle in an unfolded state with a cloth bag installed.

[0019] Figure 6 A perspective view of a folding vehicle in an unfolded state with a cloth bag installed.

[0020] Figure 7 A top view of a folding vehicle in an unfolded state with a connecting rod installed.

[0021] Figure 8 A left side view of a folding vehicle frame of a folding vehicle with a connecting head structure.

[0022] Figure 9 An enlarged perspective view of a connecting head 15 and a limiting end 16.

[0023] As shown in the figure, 1, front frame part, 2, rear frame part, 3, left side rod, 4, right side rod, 5, outer cross beam, 6, inner cross beam, 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, connecting head, 16, limiting end, 17, connecting rod, 18, cloth bag, 19, pull belt, 20, tie belt, 21, front section, 22, rear section, 23, middle support rod, 24, left side frame, 25, right side frame, 26, handle. DETAILED DESCRIPTION

[0024] The following description is provided to enable any person skilled in the art to make and use the present application. The embodiments described in the following description are only examples of the present application and are not intended to limit the scope of the present application. The principles defined in the following description can be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0025] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

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

[0027] As Figures 1 to 2 shown is a kind of folding bottom frame capable of forming U-shaped storage space, simultaneously referring to Figures 3 to 9 shown is a kind of folding car applied to the folding bottom frame, the folding bottom frame includes front frame part 1, rear frame part 2 and two left-right symmetrical connection seats, the transverse between the left side rod 3 of front frame part 1, right side rod 4, the transverse between the left side rod 3 of rear frame part 2, right side rod 4 is equipped with outer cross beam 5, inner cross beam 6, the lower fixed seat 8 for being fixedly arranged in the lower end of left side corner column of the front frame 7 of folding car is hinged to the front end of left side rod 3 of front frame part 1, the front end of left connection seat 9 is hinged to the rear end of left side rod 3 of front frame part 1, the rear end of left connection seat 9 is hinged to the front end of left side rod 3 of rear frame part 2, the lower fixed seat 8 for being fixedly arranged in the lower end of left side corner column of the rear frame 10 of folding car is hinged to the rear end of left side rod 3 of rear frame part 2;The lower fixed seat 8 for being fixedly arranged in the lower end of right side corner column of the front frame 7 of folding car is hinged to the front end of right side rod 4 of front frame part 1, the front end of right connection seat 11 is hinged to the rear end of right side rod 4 of front frame part 1, the rear end of right connection seat 11 is hinged to the front end of right side rod 4 of rear frame part 2, the lower fixed seat 8 for being fixedly arranged in the lower end of right side corner column of the rear frame 10 of folding car is hinged to the rear end of right side rod 4 of rear frame part 2;To constitute double pair of folding folding folding bottom frame;When the middle part of the bottom frame is forced to be lifted up and stored, the front frame part 1, the rear frame part 2 and each connection seat can form a U-shaped storage space 12 with the opening downward.

[0028] As Figure 2 , 4 shown, by setting the length of left connection seat 9 and right connection seat 11, the width of U-shaped storage space 12 can be set to be enough to accommodate the wheels 13 of folding car. This can further reduce the volume of logistics.

[0029] In some embodiments, in order to provide support positioning, so that the folded bottom frame in the unfolded state to obtain a better state, as shown in Figure 1 , 2 As shown in the left connecting seat 9, right connecting seat 11 are both inverted U-shaped cross-section of the open downward groove, both ends of the groove are provided with limiting portion 14, when the bottom frame is unfolded, the limiting portion 14 to the left and right side of the front frame portion 1, the left and right side of the rear frame portion 2 of the upper side of the rod 4, 4 constitute the limit.

[0030] Of course, it can also be other structures, for example, as shown in Figure 8 , 9 The left connecting seat 9, right connecting seat 11 are both inverted U-shaped cross-section of the open downward groove, both ends of the groove are hinged connecting head 15, connecting head 15 and the corresponding side rod one to one fixed connection, for example, can be riveted, threaded or welded, connecting head 15, for example, by stamping, above the hinge shaft is also provided with limiting end 16, when the bottom frame is unfolded, the limiting end 16 of both ends of the connecting seat in the horizontal direction to the left and right side of the front frame portion 1, the left and right side of the rear frame portion 2 of the rod 4, 4 constitute the limit. In this way, has a better support positioning effect, is helpful to assist in lifting the folded bottom frame flat and support strength.

[0031] In some embodiments, in order to increase the left connecting seat 9, right connecting seat 11 support and smooth movement effect when folding, as shown in Figure 7 The left connecting seat 9, right connecting seat 11 between the middle part is provided with connecting rod 17, the connecting rod 17 will be transversely connected together, when pulling the connecting rod 17 upward, through the connecting rod 17 at the same time drive the left connecting seat 9, right connecting seat 11 upward movement to make the front frame portion 1, the rear frame portion 2 each other folding.

[0032] Of course it can also be other structures, for example, as shown in Figure 5 , 6 The cloth bag 18 of the folding bicycle will be transversely connected together, the cloth bag 18 is provided with a pull belt 19, when pulling the pull belt 19 upward, through the cloth bag 18 at the same time drive the left connecting seat 9, right connecting seat 11 upward movement to make the front frame portion 1, the rear frame portion 2 each other folding.

[0033] Further, the magic tape tie 20 of the cloth bag 18 bottom of the folding bicycle will be transversely connected together, or in the left connecting seat 9, right connecting seat 11 between the fixed connecting rod 17, magic tape tie 20 and connecting rod 17 connection; the middle part of the inside bottom of the cloth bag 18 is provided with a pull belt 19, when pulling the pull belt 19 upward, the cloth bag 18 will drive the left connecting seat 9, right connecting seat 11 upward movement to make the front frame portion 1, the rear frame portion 2 each other folding. In this way, the assembly is very convenient, low manufacturing cost.

[0034] In some embodiments, to improve versatility and reduce manufacturing costs, such as Figure 1 , 2 As shown, the outer crossbeam 5 and the inner crossbeam 6 are 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. In this way, on the one hand, it can be hinged to the lower fixed seat 8 of the front frame 7 and the rear frame 10, and on the other hand, the outer crossbeam 5 and the inner crossbeam 6 are interchangeable, eliminating the need for additional molds or production tools.

[0035] In some embodiments, to increase the support density, such as Figure 1 , 2 As shown, one or more central support rods 23 are 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.

[0036] like Figure 3 , 4 As shown, 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] Among them, such as Figure 3 As shown, 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 configured with a U-shaped frame, the retractable handle 26 of the folding bike can also be placed inside the U-shaped frame, such as... Figure 4 As shown, the front frame 7 serves as the opening, while the front frame 1 forms a cavity at the bottom to accommodate the handle 26.

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

[0040] like Figure 2 , 3 As shown in Figure 4, the left connecting seat 9 and the right connecting seat 11 are configured to have 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. Figure 4 As shown, the front frame 7 and the rear frame 10 move inward synchronously and approach each other, with the front frame 7, rear frame 10, front frame 1, and rear frame 2 arranged in a parallel configuration from front to back.Figure 4 It can be seen that in the folded and closed state, a cuboid full-folding frame with small volume is formed.

[0041] The wheels 13 are preferably detachable, and when storage is required, the detached wheels 13 can be stored in the U-shaped storage space 12. Thus, the storage problem of the wheels 13 during product transportation packaging is solved, so that additional volume is not required to accommodate the wheels 13, thereby facilitating volume reduction and reducing logistics costs.

[0042] Of course, when logistics costs are not a problem, the wheels 13 can also be set up without being detached, and at this time, the U-shaped storage space 12 can also store product manuals, gifts, and other items such as fragile components.

[0043] After production and manufacturing are completed, there are two options in the logistics and sales link, the first option is to install the cloth pocket 18 at the time of shipment, and the second option is for the user to install the cloth pocket 18 after receiving the product. In the first option, since the cloth pocket 18 can also be folded with the frame, the cloth pocket 31 will not affect folding and can still form a cuboid frame; in the second option, as shown in the folded and folded cuboid frame, the cloth pocket 18 can be accommodated in the U-shaped storage space 12, and when the user purchases the product, the cloth pocket 18 can be installed after the cuboid frame is taken out of the carton, which is very small and convenient. Figure 4

[0044] In this example, the left side frame 24 and the right side frame 25 are exemplified as an eight-shaped folding structure formed by two parallelograms, and when folding, the left side frame 24 and the right side frame 25 are folded in the front-rear direction as the front frame 7 and the rear frame 10 are relatively closed.

[0045] Of course, the left side frame 24 and the right side frame 25 can also be, for example, an X-shaped two-cross pipe frame structure, or an X-shaped three-cross pipe frame structure, or an X-shaped four-cross pipe frame structure, or other irregular cross pipe frame structures, or a mouth-shaped frame structure, and any left side frame 24 and right side frame 25 suitable for the present disclosure can be applied to the present disclosure.

[0046] Of course, the front frame 7 and the rear frame 10 can also be, for example, a U-shaped frame structure, or a sun-shaped frame structure, or a field-shaped frame structure, and any front frame 7 and rear frame 10 suitable for the present disclosure can be applied to the present disclosure.

[0047] As can be seen from the above, the present disclosure is a folding car capable of forming a U-shaped storage space and adopting a folding bottom frame. In the example, the length of each component can be determined by size matching optimization when manufacturing a specific product, so that after folding, a regular cuboid frame can be obtained. Figure 4 ​the unfolded state as shown in the figure, or in the case of installing the bag 18, the unfolded state as shown in the figure, the bag 18 being located in the cuboid containing frame formed by the front frame 7, the rear frame 10, the left side frame 24, the right side frame 25 and the folded bottom frame. Figure 3 the unfolded state as shown in the figure, or in the case of installing the bag 18, the unfolded state as shown in the figure, the bag 18 being located in the cuboid containing frame formed by the front frame 7, the rear frame 10, the left side frame 24, the right side frame 25 and the folded bottom frame. Figure 5 , 6 the unfolded state as shown in the figure, or in the case of installing the bag 18, the unfolded state as shown in the figure, the bag 18 being located in the cuboid containing frame formed by the front frame 7, the rear frame 10, the left side frame 24, the right side frame 25 and the folded bottom frame.

[0048] In understanding the present application, if necessary, the above structure can refer to other embodiments / attached Figure 1 and understand that it is not elaborated here.

[0049] The above is only an optional specific embodiment of the present application, and equivalent changes or modifications made to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.

Claims

1. A foldable bottom frame capable of forming a U-shaped receiving space, characterized in that, The frame includes a front frame part (1), a rear frame part (2), and two left-right symmetrical connecting seats. The transverse direction between the left side rod (3) and the right side rod (4) of the front frame part (1) and the transverse direction between the left side rod (3) and the right side rod (4) of the rear frame part (2) are provided with outer cross beams (5) and inner cross beams (6). The front end of the left side rod (3) of the front frame part (1) is hinged to the lower fixing seat (8) fixed to the lower end of the left corner column of the front frame (7) of the folding bicycle. The rear end of the left side rod (3) of the front frame part (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 part (2). The rear end of the left side rod (3) of the rear frame part (2) is hinged to the lower fixing seat (8) fixed to the lower end of the left corner column of the rear frame (10) of the folding bicycle. The front end of the right side rod (4) of the front frame part (1) is hinged to the lower fixing seat (8) fixed to the lower end of the right corner column of the front frame (7) of the folding bicycle. The rear end of the right side rod (4) of the front frame part (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 part (2). The rear end of the right side rod (4) of the rear frame part (2) is hinged to the lower fixing seat (8) fixed to the lower end of the right corner column of the rear frame (10) of the folding bicycle. Thus, a double-fold folding bottom frame is formed. When the middle part of the bottom frame is forced to be lifted upward for folding, the front frame part (1), the rear frame part (2), and the connecting seats can form a U-shaped storage space (12) with an opening downward.

2. The folded bottom frame capable of forming a U-shaped receiving space according to claim 1, wherein, The size of the U-shaped storage space (12) is set to accommodate the wheels (13) of the folding bicycle.

3. The folded bottom frame capable of forming a U-shaped receiving space according to claim 1, wherein, The left connecting seat (9) and the right connecting seat (11) are both downward-opening groove-shaped members with inverted U-shaped cross sections. The two ends of the groove-shaped members are provided with limiting parts (14). When the bottom frame is unfolded, the limiting parts (14) limit the upper sides of the left and right side rods (4) of the front frame part (1) and the left and right side rods (4) of the rear frame part (2) in the downward direction. Alternatively, the left connecting seat (9) and the right connecting seat (11) are both downward-opening groove-shaped members with inverted U-shaped cross sections. The two ends of the groove-shaped members 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 further provided with limiting ends (16) above the hinge shafts. When the bottom frame is unfolded, the two ends of the connecting seat limit the left and right side rods (4) of the front frame part (1) and the left and right side rods (4) of the rear frame part (2) in the horizontal direction through the limiting ends (16) of the connecting heads (15).

4. The folded bottom frame capable of forming a U-shaped receiving space according to claim 1, wherein, The middle parts of the left connecting seat (9) and the right connecting seat (11) are provided with a connecting rod (17) that transversely connects the left connecting seat (9) and the right connecting seat (11) together. When the connecting rod (17) is pulled upward, the left connecting seat (9) and the right connecting seat (11) are simultaneously moved upward by the connecting rod (17) to fold the front frame part (1) and the rear frame part (2) relative to each other.

5. The folded bottom frame capable of forming a U-shaped receiving space according to claim 1, wherein, The magic tape tie (20) of the bottom of the cloth bag (18) of the folding bicycle ties the inner cross beams (6) inside the front frame (1) and the rear frame (2) together, or a connecting rod (17) is fixed between the left connecting seat (9) and the right connecting seat (11) transversely, and the magic tape tie (20) is connected with the connecting rod (17); the middle part of the inner side of the cloth bag (18) is provided with a pull belt (19), when the pull belt (19) is pulled upward, the cloth bag (18) will drive the left connecting seat (9) and the right connecting seat (11) to move upward to make the front frame (1) and the rear frame (2) fold each other.

6. The folded bottom frame capable of forming a U-shaped receiving space according to claim 1, wherein, The outer cross beam (5) and the inner cross beam (6) are set to be equal in length, and the front section (21) of the left side rod (3) and the right side rod (4) of the front frame (1) are straight sections or are set to be outwardly expanded, and the rear section (22) of the left side rod (3) and the right side rod (4) of the rear frame (2) are straight sections or are set to be outwardly expanded.

7. The folded bottom frame capable of forming a U-shaped receiving space according to claim 1, wherein, The middle support rod (23) is arranged between the outer cross beam (5) and the inner cross beam (6) of the front frame (1) and between the outer cross beam (5) and the inner cross beam (6) of the rear frame (2).

8. A folding vehicle comprising a front frame (7), a rear frame (10), a left side frame (24), a right side frame (25), and a bottom frame, the front frame (7), the rear frame (10), the left side frame (24), the right side frame (25) forming four sides of a rectangle or a square, the bottom frame serving as a bottom of the rectangle or the square, characterized in that, The bottom frame adopts the bottom frame according to any one of claims 1 to 7.

9. The foldable vehicle of claim 8, wherein, The left side frame (24) and the right side frame (25) adopt an eight-shaped frame structure formed by double parallelograms and / or an X-shaped two-cross pipe frame structure and / or an X-shaped three-cross pipe frame structure and / or an X-shaped four-cross pipe frame structure and / or a cross pipe frame structure and / or a square frame.

10. The foldable vehicle of claim 8, wherein, The front frame (7) and the rear frame (10) adopt a square frame and / or a U-shaped frame structure and / or a sun-shaped frame structure and / or a field-shaped frame structure.

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