Folded-in-half type folding bicycle

Abstract

The invention provides a folding type folding bicycle which comprises a bottom frame (6), a front frame (2), a rear frame (3), a left side frame (4) and a right side frame (5), when the folding bicycle is folded, the middle of the bottom frame (6) is pulled upwards to enable a front frame part (11) and a rear frame part (12) to be folded oppositely, a left matching structure (21) moves upwards from the lower end along a left guide structure (20), and a right matching structure (24) moves upwards from the lower end along a right guide structure (23); the front frame (2) and the rear frame (3) draw close to each other to link the parallelograms of the left side frame (4) and the right side frame (5) to draw close synchronously so as to lift the middle support, so that the front frame (2), the rear frame (3), the left side frame (4), the right side frame (5), the front frame part (11) and the rear frame part (12) draw close to each other and finally form a folded state, and the front frame part (11), the rear frame part (12) and the connecting seats can form a U-shaped storage space (16) with a downward opening; the volume can be reduced, and the capacity can be as large as possible.

Description

Technical Field

[0001] The invention relates to the technical field of folding bicycles, in particular to a folding bicycle. Background Art

[0002] With the rise of outdoor leisure activities, the demand for outdoor products is also increasing. One of the outdoor products is a folding bicycle, which is essentially a foldable and storable cargo carrier. Its main function is to carry cargo, but when stored, it can be folded and reduced in size for easy storage. The folding bicycle is usually in the shape of a cuboid after unfolding. The folding bicycle includes a front frame, a rear frame, a left frame, a right frame and a bottom frame. The front frame, the rear frame, the left frame and the right frame form four circumferential sides of the folding bicycle. The four sides plus the bottom surface of the bottom frame constitute a cuboid cargo space. When wheels are installed on the folding bicycle, it can be moved by the wheels.

[0003] As can be seen from the above, the structure of the folding bicycle needs to be designed to be foldable, and the design requirements of the front frame, rear frame, left frame, right frame and bottom frame when folding need to be considered. The structure has a certain complexity, so how to design the folding and volume control after folding becomes a difficulty. Although the prior art has proposed many folding design schemes, 1) how to make the volume small, 2) how to make the volume small and the capacity as large as possible, have greater innovation difficulties. 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 foldable bicycle which is conducive to reducing the volume while maximizing the capacity.

[0005] In order to solve the above technical problems, the present invention proposes a foldable bicycle, including wheels and a foldable frame, a detachable structure or a non-detachable structure is adopted between the wheels and the frame, the frame includes a base frame, a front frame arranged on the front side of the base frame, a rear frame arranged on the rear side of the base frame, and side frames arranged on both sides of the base frame, and the two side frames are a left side frame and a right side frame respectively.

[0006] The front frame and the rear frame both adopt a U-shaped frame, and the left and right side rods of the front frame and the left and right side rods of the rear frame serve as four corner columns at the four corners of the frame.

[0007] The chassis comprises a front frame, a rear frame and two connecting seats symmetrically arranged on the left and right sides, an outer crossbeam and an inner crossbeam are arranged between the left and right rods of the front frame and between the left and right rods of the rear frame, the front end of the left rod of the front frame is hinged to the lower fixing seat at the lower end of the left corner column of the front frame, the rear end of the left rod of the front frame is hinged to the front end of the left connecting seat, the rear end of the left connecting seat is hinged to the front end of the left rod of the rear frame, the rear end of the left rod of the rear frame is hinged to the lower fixing seat at the lower end of the left corner column of the rear frame; the front end of the right rod of the front frame is hinged to the lower fixing seat at the lower end of the left corner column of the front frame The lower fixed seat at the lower end of the right corner column is hinged, the rear end of the right rod of the front frame part 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 rod of the rear frame part, and the rear end of the right rod of the rear frame part is hinged to the lower fixed seat fixedly arranged at the lower end of the right corner column of the rear frame; thereby forming a double-folded folding chassis; when force is applied to the middle part of the chassis to lift it up for storage and folding, the front frame part, the rear frame part and the connecting seats can form a U-shaped storage space with the opening facing downward, and at the same time, the front frame and the rear frame are synchronously linked and moved inwardly to move closer to each other, and the front frame, the front frame part, the rear frame part and the rear frame are in a closed state distributed in sequence from front to back.

[0008] A left side frame is arranged on the left outer side of the base frame, and a right side frame is arranged on the right outer side of the base frame. The left side frame and the right side frame each include two parallelograms. On the same side, the two adjacent inner ends of the two parallelograms are hinged through a middle support. The outer ends of the two parallelograms are respectively hinged to the front frame and the rear frame through the lower fixed seat. The left side frame corresponds to the left middle support, and the right side frame corresponds to the right middle support. A rigid left hanging device is arranged between the left middle support and the middle part of the left connecting seat. The upper end of the left hanging device is fixed to the left middle support. A left guide structure is vertically provided on the left lifting device, and a left matching structure that cooperates with the left guide structure is provided in the middle of the left connecting seat. The left guide structure also lowers the left matching structure to form a first limit. A rigid right lifting device is provided between the right middle support and the middle of the right connecting seat. The upper end of the right lifting device is fixed on the right middle support. A right guide structure is vertically provided on the right lifting device. A right matching structure that cooperates with the right guide structure is provided in the middle of the right connecting seat. The right guide structure also lowers the right matching structure to form a second limit.

[0009] When the left side frame and the right side frame are in the unfolded state, the two parallelograms are distributed in an eight-shaped shape, and the left matching structure moves to the lower stop point of the left guide structure to form a first limit, and the right matching structure moves to the lower stop point of the right guide structure to form a second limit, so that the front frame, the connecting seat, and the rear frame form a flat base frame, and at the same time, the left lifting device and the right lifting device hang the base frame through the left connecting seat and the right connecting seat to finally form an unfolded state.

[0010] When the frame is restored to be folded, the middle part of the bottom frame is pulled upward to fold the front frame and the rear frame relative to each other, and the left matching structure moves upward from the lower end along the left guide structure, and the right matching structure moves upward from the lower end along the right guide structure. At the same time, the front frame and the rear frame drive the front frame and the rear frame to move closer to each other, and the front frame and the rear frame move closer to each other, driving the parallelograms of the left and right frames to move closer synchronously to lift the middle support, so that the front frame, the rear frame, the left frame, the right frame, the front frame and the rear frame move closer to each other and finally form a folded state.

[0011] As an improvement, the left lifting device is sheet-shaped or rod-shaped, and is vertically provided with a left guide groove or a left guide rod. A left guide column or a left guide sleeve is arranged in the middle of the left connecting seat, and the left guide column or the left guide sleeve is slidably matched with the left guide groove or the left guide rod. The right lifting device is sheet-shaped or rod-shaped, and is vertically provided with a right guide groove or a right guide rod. A right guide column or a right guide sleeve is arranged in the middle of the right connecting seat, and the right guide column or the right guide sleeve is slidably matched with the right guide groove or the right guide rod.

[0012] As an improvement, the front frame, the lower part of the rear frame and / or the lower ends of the four corner columns are detachably connected with wheels, and when storage is required, the removed wheels can be stored in the U-shaped storage space.

[0013] As an improvement, a connecting column is provided on the lower cross beam of the front frame, and a wheel is detachably connected to the connecting column, and a wheel is detachably connected to the lower end of each of the two rear corner columns; or a connecting column is provided on the lower cross beam of the rear frame, and a wheel is detachably connected to the connecting column, and a wheel is detachably connected to the lower end of each of the two front corner columns; or connecting columns are provided on the lower cross beam of the front frame and the lower cross beam of the rear frame, and the connecting columns are detachably connected to the wheels; or a wheel is detachably connected to the lower end of each of the four corner columns.

[0014] As an improvement, the connecting column is fixedly arranged at the lower part of the lower cross beam, or at the front part of the lower cross beam, or at the rear part of the lower cross beam, or is cross-fixed with the lower cross beam, and the lower end of the connecting column is arranged flush with the lower ends of the two corner columns.

[0015] As an improvement, the connecting column and the four corner columns all adopt an outer sleeve, and the cross section of the outer sleeve is a tubular body with a circular, polygonal, D-shaped, elliptical or flat elliptical shape.

[0016] As an improvement, the left middle support and the right middle support are both provided with a transmission structure, which is respectively connected to any adjacent end of the two parallelograms. When one of the parallelograms moves, the other parallelogram is synchronously driven to move through the transmission structure. The movement direction is: when one of the parallelograms moves outward, the other parallelogram also moves outward, so that the two parallelograms move away from each other to achieve the expanded state; when one of the parallelograms moves inward, the other parallelogram also moves inward, so that the two parallelograms move closer to each other to achieve the stored state.

[0017] As an improvement, the left connecting seat and the right connecting seat both adopt a groove-shaped member with an inverted U-shaped cross-section and an opening facing downward, and both ends of the groove-shaped member are provided with a limiting portion. When the base frame is unfolded, the limiting portion limits the upper side surfaces of the left and right side rods of the front frame portion and the left and right side rods of the rear frame portion in the downward direction; or the left connecting seat and the right connecting seat both adopt a groove-shaped member with an inverted U-shaped cross-section and an opening facing downward, and both ends of the groove-shaped member are hingedly connected to the connecting head, and the connecting head is fixedly connected to the corresponding side rod in a one-to-one correspondence. The connecting head is also provided with a limiting end above the hinge axis. When the base frame is in the unfolded state, the two ends of the connecting seat limit the left and right side rods of the front frame portion and the left and right side rods of the rear frame portion in the horizontal direction through the limiting ends of the connecting head.

[0018] As an improvement, a connecting rod is provided between the middle parts of the left connecting seat and the right connecting seat, which connects the left connecting seat and the right connecting seat together laterally. When the connecting rod is pulled upward, the left connecting seat and the right connecting seat are simultaneously driven upward by the connecting rod so that the front frame part and the rear frame part are folded against each other.

[0019] As an improvement, the Velcro strap on the bottom of the cloth bag of the folding bicycle is used to bind the inner cross beams on the inner sides of the front frame and the rear frame together, or a connecting rod is fixed laterally between the left connecting seat and the right connecting seat, and the Velcro strap is connected to the connecting rod; a pull strap is provided in the middle of the inner bottom surface of the cloth bag, and when the pull strap is pulled upward, the cloth bag will drive the left connecting seat and the right connecting seat to move upward so that the front frame and the rear frame can be folded against each other.

[0020] As an improvement, it also includes a handle, and the user uses the handle to drive the folding bicycle to move. When the front frame, the front frame part, the rear frame part and the rear frame are in a closed state distributed in sequence from front to back, a accommodating recess with the front frame as the mouth and the front frame part as the bottom is formed between the front frame and the front frame part, and / or a accommodating recess with the rear frame as the mouth and the rear frame part as the bottom is formed between the rear frame and the rear frame part. The accommodating recess can accommodate the handle for storage.

[0021] As an improvement, wheels are non-detachably provided at the lower parts of the front frame, the rear frame and / or the lower ends of the four corner columns. When stowed and folded, the wheels are brought together in the front-to-back direction, and when unfolded, the wheels are unfolded in the front-to-back direction.

[0022] As an improvement, there are four wheels, which are arranged in a manner of two universal wheels on the front side and two fixed wheels on the rear side, or two universal wheels on the rear side and two fixed wheels on the front side, or two universal wheels on the front side and two universal wheels on the rear side.

[0023] After adopting the above structure, compared with the prior art, the present invention has the following advantages: through structural design, when the middle part of the base frame is forced to be lifted up for storage and folding, the front frame part, the rear frame part and the connecting seats can form a U-shaped storage space with the opening facing downward, and at the same time, the front frame and the rear frame are synchronously linked and moved inward to be close to each other, and the front frame, the front frame part, the rear frame part and the rear frame are in a state of being distributed in sequence from front to back and being close to each other, and a left side frame is arranged on the left side outer side of the base frame, and a right side frame is arranged on the right side outer side of the base frame, and the left side frame and the right side frame each include two parallelograms, which is conducive to reducing the volume when folded, and at the same time maximizing the capacity as much as possible in the unfolded state.

[0024] The U-shaped storage space can store accessories of the folding bicycle, so that the accessories are hidden in the U-shaped storage space, further reducing the logistics volume and reducing the logistics cost.

[0025] At the same time, in particular, the following structure is also provided and organically integrated into the overall technical solution: a rigid left lifting device is provided between the left middle support and the middle part of the left connecting seat, the upper end of the left lifting device is fixed on the left middle support, the left lifting device is vertically provided with a left guide structure, the middle part of the left connecting seat is provided with a left matching structure which cooperates with the left guide structure for guidance, and the left guide structure also performs a lower limit on the left matching structure to form a first limit; a rigid right lifting device is provided between the right middle support and the middle part of the right connecting seat, the upper end of the right lifting device is fixed on the right middle support, the right lifting device is vertically provided with a right guide structure, the middle part of the right connecting seat is provided with a right matching structure which cooperates with the right guide structure for guidance, and the right guide structure also performs a lower limit on the right matching structure to form a second limit.

[0026] The design of the rigid left lifting device, the left matching structure, the rigid right lifting device, and the guiding matching structure of the right matching structure has the following advantages: 1) it also has the function of synchronously sliding up and down of the adjacent ends of the front frame and the rear frame; 2) it avoids the front and rear swinging and up and down asynchronism of the front and rear frame during folding and unfolding; 3) it is conducive to the smoothness of folding and unfolding of the frame.

[0027] The reason is that a rigid left lifting device is set, the upper end of which is fixed on the left middle support, the left lifting device is vertically provided with a left guide structure, the middle part of the left connecting seat is provided with a guiding cooperation with the left guide structure, and a rigid right lifting device is set, the upper end of the right lifting device is fixed on the right middle support, the right lifting device is vertically provided with a right guide structure, and the middle part of the right connecting seat is provided with a right matching structure for guiding cooperation with the right guide structure, and the adjacent ends of the front frame and the rear frame are guided up and down along the lifting device, thereby limiting the front frame and the rear frame from swinging excessively back and forth or up and down, so that it always moves upward along the center line, which is much smoother. If there is no "middle part of the left connecting seat is provided with a guiding cooperation with the left guide structure" and "middle part of the right connecting seat is provided with a guiding cooperation with the right guide structure", then when the frame is pulled upward during folding or the frame slides downward during unfolding, the front frame and the rear frame will swing back and forth and be out of sync up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention discloses a foldable foldable bicycle in a folded state, showing a front side perspective perspective.

[0029] Figure 2 The present invention discloses a foldable bicycle in a folded state, which is a three-dimensional schematic diagram from a rear side perspective.

[0030] Figure 3 The present invention discloses a front side view of a foldable bicycle in a folded state.

[0031] Figure 4 The figure is a top view of a foldable bicycle disclosed in the present invention.

[0032] Figure 5 The present invention discloses a three-dimensional schematic diagram of a foldable bicycle in a unfolded state.

[0033] Figure 6 The present invention discloses a left side view of a foldable bicycle in a unfolded state.

[0034] Figure 7 The present invention discloses a top view of a foldable bicycle in a unfolded state.

[0035] Figure 8 It is the AA section view.

[0036] Fig. 9 The present invention discloses a foldable bicycle in a three-dimensional schematic diagram from a left side perspective in an unfolded state after a cloth bag is installed.

[0037] Fig.10 The present invention discloses a foldable bicycle in a three-dimensional schematic diagram from an upper side perspective in an unfolded state after a cloth bag is installed.

[0038] Fig.11 The present invention discloses a foldable bicycle in a three-dimensional schematic diagram from a lower side perspective in an unfolded state after a cloth bag is installed.

[0039] Fig.12 The present invention discloses a foldable foldable bicycle with a foldable frame, which is a front side perspective stereoscopic diagram when the foldable frame is in a folded state.

[0040] Fig.13 For the general Fig.12 A three-dimensional schematic diagram showing the left middle support exploded.

[0041] Fig.14 The present invention discloses a left side view of a folding frame of a folding bicycle in a folded state.

[0042] Fig.15 The present invention discloses a foldable bicycle with a bottom frame provided with a connecting rod, and a top view of the bicycle in an unfolded state.

[0043] Fig.16 The present invention discloses a three-dimensional schematic diagram of a chassis of a foldable bicycle in a unfolded state.

[0044] Fig.17 The present invention discloses a three-dimensional schematic diagram of a chassis of a foldable bicycle in a folded state.

[0045] Fig.18 The present invention discloses a left side view of a folding frame of a folding bicycle with a connecting head structure.

[0046] Fig.19 This is an enlarged three-dimensional schematic diagram of A.

[0047] As shown in the figure, 1, wheel, 2, front frame, 3, rear frame, 4, left frame, 5, right frame, 6, bottom frame, 7, left rod, 8, right rod, 9, outer crossbeam, 10, inner crossbeam, 11, front frame, 12, rear frame, 13, lower fixed seat, 14, left connecting seat, 15, right connecting seat, 16, U-shaped storage space, 17, left middle support, 18, right middle support, 19, left lifting device, 20, left guide structure, 21, left matching structure, 22, right lifting device, 23, right guide structure, 24, right matching structure, 25, connecting column, 26, lower crossbeam, 27, limiting part, 28, connecting head, 29, limiting end, 30, connecting rod, 31, cloth bag, 32, cable tie, 33, middle support rod, 34, pull belt, 35, handle, 36, transmission gear, 37, corner column. DETAILED DESCRIPTION

[0048] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0049] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0050] It is to 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 an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0051] like Figures 1 to 19 The figure shows a foldable bicycle disclosed in the present invention, which includes wheels 1 and a foldable frame. A detachable structure or a non-detachable structure is adopted between the wheels 1 and the frame. The frame includes a base frame 6, a front frame 2 arranged at the front side of the base frame 6, a rear frame 3 arranged at the rear side of the base frame 6, and side frames arranged on both sides of the base frame 6, and the two side frames are a left side frame 4 and a right side frame 5 respectively.

[0052] Among them, Figure 1 , 2 As shown in , 5, the front frame 2 and the rear frame 3 both adopt a U-shaped frame, and the left and right side bars of the front frame 2 and the left and right side bars of the rear frame 3 serve as four corner columns 37 at the four corners of the frame.

[0053] A lower fixing seat 13 is provided at the lower end of each corner column 37, and the front frame 2 and the rear frame 3 are connected to the bottom frame 6 respectively through the lower fixing seat 13. Specifically: Figure 5 , 11As shown, the chassis 6 includes a front frame portion 11, a rear frame portion 12, and two connecting seats symmetrically arranged on the left and right, namely a left connecting seat 14 and a right connecting seat 15. An outer crossbeam 9 and an inner crossbeam 10 are arranged between the left side rod 7 and the right side rod 8 of the front frame portion 11 and between the left side rod 7 and the right side rod 8 of the rear frame portion 12. The front end of the left side rod 7 of the front frame portion 11 is hinged to the lower fixing seat 13 fixed at the lower end of the left corner column 37 of the front frame 2, the rear end of the left side rod 7 of the front frame portion 11 is hinged to the front end of the left connecting seat 14, and the rear end of the left connecting seat 14 is hinged to the left side rod 7 of the rear frame portion 12. The front end is hinged, and the rear end of the left side rod 7 of the rear frame part 12 is hinged to the lower fixing seat 13 fixed at the lower end of the left corner column 37 of the rear frame 3; the front end of the right side rod 8 of the front frame part 11 is hinged to the lower fixing seat 13 fixed at the lower end of the right corner column 37 of the front frame 2, the rear end of the right side rod 8 of the front frame part 11 is hinged to the front end of the right connecting seat 15, the rear end of the right connecting seat 15 is hinged to the front end of the right side rod 8 of the rear frame part 12, and the rear end of the right side rod 8 of the rear frame part 12 is hinged to the lower fixing seat 13 fixed at the lower end of the right corner column 37 of the rear frame 3; thereby forming a double-folded folding chassis 6.

[0054] In this example, in order to increase the support density, Fig.16 , 17 As shown, one or more middle support rods 33 are provided longitudinally or transversely between the outer cross beam 9 and the inner cross beam 10 of the front frame portion 11 and between the outer cross beam 9 and the inner cross beam 10 of the rear frame portion 12 .

[0055] In this example, in order to improve versatility and reduce production costs, such as Fig.16 , 17 As shown, the outer crossbeam 9 and the inner crossbeam 10 are set to be of equal length, and the front sections of the left side rod 7 and the right side rod 8 of the front frame portion 11 are both expanded outward, and the rear sections of the left side rod 7 and the right side rod 8 of the rear frame portion 12 are both expanded outward. In addition, it is beneficial to improve the supporting and supporting effect of the bottom frame 6 on the cloth bag 31 and the articles.

[0056] like Fig.16 , 17 As shown, the left connecting seat 14 and the right connecting seat 15 are set to have a certain length. When the middle part of the bottom frame 6 is lifted upward for storage and folding, the front frame part 11, the rear frame part 12 and the connecting seats can form a U-shaped storage space 16 with the opening facing downward. Fig.12 , 14 As shown, the front frame 2 and the rear frame 3 are synchronously linked and moved inwards to be close to each other, and the front frame 2, the front frame part 11, the rear frame part 12 and the rear frame 3 are in a close state in sequence from front to back. Fig.12 , 14 It can be seen that when the folded and closed state is in place, it is beneficial to reduce the volume.

[0057] Preferably, Figure 1 , 2 As shown in FIGS. 3, 4 and 5, the lower parts of the front frame 2 and the rear frame 3 and / or the lower ends of the four corner columns 37 are detachably connected with wheels 1, and when storage is required, the removed wheels 1 can be stored in the U-shaped storage space 16. This solves the storage problem of the wheels 1, and does not require additional volume to accommodate the wheels 1, which is conducive to reducing the volume, thereby greatly reducing the packaging and logistics costs, and is very suitable for the long-distance export market.

[0058] Of course, the wheel 1 can also be set to be non-detachable, that is, after being installed in the factory, it does not need to be disassembled later. For short-distance domestic sales that are sensitive to logistics costs or do not require storage volume, it can be set to be non-detachable, so the U-shaped storage space 16 can store instructions, gifts, vulnerable parts and other items.

[0059] A specific solution in which the wheel 1 is non-detachable, for example, the front frame 2, the lower part of the rear frame 3 and / or the lower ends of the four corner columns 37 are respectively provided with wheels 1 in a non-detachable manner. When stored and folded, the wheels 1 are closed together in the front-to-back direction, and when unfolded, the wheels 1 are unfolded in the front-to-back direction.

[0060] The wheels 1 may be four, and the arrangement may be, for example, two universal wheels at the front and two fixed wheels at the rear, or two universal wheels at the rear and two fixed wheels at the front, or two universal wheels at the front and two universal wheels at the rear.

[0061] In this example, if Figure 5 As shown, a connecting column 25 is provided on the lower cross beam 26 of the front frame 2, and two wheels 1 are detachably connected to the connecting column 25, and a wheel 1 is detachably connected to the lower end of each of the two rear corner columns 37.

[0062] In this disclosure, Figure 1 , 2 , 3, 4, and 5, further comprising a handle 35, the user drives the folding bicycle to move by the handle 35, when the front frame 2, the front frame portion 11, the rear frame portion 12, and the rear frame 3 are in a state of being arranged and closed in sequence from front to back, a receiving recess with the front frame 2 as the opening and the front frame portion 11 as the bottom is formed between the front frame 2 and the front frame portion 11, and / or a receiving recess with the rear frame 3 as the opening and the rear frame portion 12 as the bottom is formed between the rear frame 3 and the rear frame portion 12, and the receiving recess can accommodate the handle 35 for storage. At this time, the thickness of the handle 35 is preferably equal to or less than the depth of the receiving recess, and of course, it can also be appropriately greater than the depth of the receiving recess.

[0063] After the production is completed, there are two options for logistics and sales. The first option is to install the cloth bag 31 when leaving the factory, and the second option is for the user to install the cloth bag 31 by himself after receiving it. In the first option, since the cloth bag 31 can also be folded with the frame, it can still form a Figure 1 , 2 , 3, 4, and the frame is provided with a cloth bag 31, but the cloth bag 31 is in a folded state; in the second case, as shown in Figure 1 , 2 The foldable bicycle shown in 3 and 4 is packed into a carton as a whole. Figure 1 , 2 , 3, and 4 already include a folding frame, wheels 1, and handles 35, which form a very small rectangular parallelepiped in the folded state. The entire rectangular parallelepiped frame is put into a carton, and the cloth bag 31 can preferably be accommodated in the U-shaped storage space 16. After the user purchases it, the rectangular parallelepiped frame can be taken out of the carton, unfolded, and the cloth bag 31 can be installed. It is very small and convenient.

[0064] When realizing the U-shaped storage space 16, in order to realize the linkage function, under the design goal of making the volume small and the capacity as large as possible, it is also necessary to consider how the left frame 4 and the right frame 5 are organically combined into the overall technical solution to achieve the design purpose. Specifically: the left frame 4 is set on the left side of the bottom frame 6, and the right frame 5 is set on the right side of the bottom frame 6. The left frame 4 and the right frame 5 each include two parallelograms. On the same side, Figure 5 , 8 As shown in Figures 1 and 13, the two adjacent inner ends of the two parallelograms are hinged through the middle support, and the outer ends of the two parallelograms are respectively hinged to the front frame 2 and the rear frame 3 through the lower fixed seat 13, wherein the left side frame 4 corresponds to the left middle support 17, and the right side frame 5 corresponds to the right middle support 18. A rigid left hanging device 19 is provided between the left middle support 17 and the middle part of the left connecting seat 14, and the upper end of the left hanging device 19 is fixed on the left middle support 17. The left hanging device 19 is vertically provided with a left guide structure 20. The middle part of the left connecting seat 14 is provided with a left guide structure 20. The left guide structure 20 guides the left matching structure 21, and the left guide structure 20 also limits the left matching structure 21 to the lower position to form a first limit. A rigid right lifting device 22 is provided between the right middle support 18 and the middle of the right connecting seat 15. The upper end of the right lifting device 22 is fixed on the right middle support 18. The right lifting device 22 is vertically provided with a right guide structure 23. The middle part of the right connecting seat 15 is provided with a right matching structure 24 that guides and cooperates with the right guide structure 23. The right guide structure 23 also limits the right matching structure 24 to the lower position to form a second limit.

[0065] Therefore, if Figure 5 As shown, when the left side frame 4 and the right side frame 5 are in the unfolded state, the two parallelograms are distributed in an eight-shaped shape, and the left matching structure 21 moves to the lower stop point of the left guide structure 20 to form a first limit, and the right matching structure 24 moves to the lower stop point of the right guide structure 23 to form a second limit, so that the front frame part 11, the connecting seat, and the rear frame part 12 form a flat base frame 6, and at the same time, the left lifting device 19 and the right lifting device 22 hang the base frame 6 through the left connecting seat 14 and the right connecting seat 15 and finally form an unfolded state.

[0066] When the frame is folded back up, Figure 1 , 12 As shown in FIG. 14 , the middle portion of the base frame 6 is pulled upward to fold the front frame portion 11 and the rear frame portion 12 relative to each other, and the left matching structure 21 moves upward from the lower end along the left guide structure 20, and the right matching structure 24 moves upward from the lower end along the right guide structure 23. At the same time, the front frame portion 11 and the rear frame portion 12 drive the front frame 2 and the rear frame 3 to move closer to each other, and the front frame 2 and the rear frame 3 move closer to each other to drive the parallelogram of the left frame 4 and the right frame 5 to move closer synchronously to lift the middle support, so that the front frame 2, the rear frame 3, the left frame 4, the right frame 5, the front frame portion 11, and the rear frame portion 12 move closer to each other and finally form a folded state.

[0067] The first limit and the second limit are used not only to form a flat base frame 6 that is reliably supported, but also to improve the load-bearing capacity of the base frame 6 .

[0068] In this disclosure, in order to facilitate the capacity to be as large as possible, such as Figure 5 As shown, the front frame 2, the rear frame 3, the left frame 4, and the right frame 5 all adopt a single rod structure that does not overlap up and down. Compared with the Chinese patent number CN202310206035.X, the patent name is a first folding component and a second folding component of a folding trailer, which can greatly increase the upper and lower and front and back accommodating space and increase more cargo capacity.

[0069] In some embodiments, in order to facilitate the capacity to be as large as possible, such as Figure 5 As shown, the left lifting device 19 is sheet-shaped, and a left guide groove is vertically provided on the left lifting device 19, and the left guide groove serves as a left guide structure 20. A left guide column is arranged in the middle of the left connecting seat 14, and the left guide column serves as a left matching structure 21. The left guide column is slidably matched with the left guide groove. The right lifting device 22 is also sheet-shaped, and a right guide groove is vertically provided on the right lifting device 22, and the right guide groove serves as a right guide structure 23. A right guide column is arranged in the middle of the right connecting seat 15, and the right guide column serves as a right matching structure 24. The right guide column or the right guide sleeve is slidably matched with the right guide groove or the right guide rod.

[0070] Of course, other structures may also be possible. For example, the left lifting device 19 is rod-shaped, and a left guide groove is vertically provided on the left lifting device 19. The left guide groove serves as a left guide structure 20. A left guide column is provided in the middle of the left connecting seat 14. The left guide column serves as a left matching structure 21. The left guide column slides with the left guide groove. The right lifting device 22 is also sheet-shaped, and a right guide groove is vertically provided on the right lifting device 22. The right guide groove serves as a right guide structure 23. A right guide column is provided in the middle of the right connecting seat 15. The right guide column serves as a right matching structure 24. The right guide column or the right guide sleeve slides with the right guide groove or the right guide rod.

[0071] It can also be other structures, for example, the left lifting device 19 is rod-shaped, and the left lifting device 19 is vertically provided with a left guide rod, and the left guide rod serves as a left guide structure 20. A left guide sleeve is provided in the middle of the left connecting seat 14, and the left guide sleeve serves as a left matching structure 21. The left guide rod and the left guide sleeve are slidably matched. The right lifting device 22 is also rod-shaped, and the right lifting device 22 is vertically provided with a right guide rod, and the right guide rod serves as a right guide structure 23. A right guide sleeve is provided in the middle of the right connecting seat 15, and the right guide sleeve serves as a right matching structure 24. The right guide rod and the right guide sleeve are slidably matched.

[0072] In addition to the above-mentioned guide structures, other guide structures may also be used. All guide structures applicable to the present disclosure may be applied to the present disclosure, and examples are not given one by one here.

[0073] In some embodiments, in order to facilitate submission of small Figure 1 , 5 As shown in FIGS. 12 and 12 , the connecting column 25 is fixedly arranged at the lower portion of the lower cross beam 26 between the two corner columns 37 of the front frame 2 , and the lower end of the connecting column 25 is arranged flush with the lower ends of the two corner columns 37 .

[0074] Of course, other structures are also possible, for example, the connecting column 25 is fixedly arranged at the front part of the lower cross beam 26 between the two corner columns 37 of the front frame 2, or at the rear part of the lower cross beam 26, or is cross-fixed with the lower cross beam 26, and the lower end of the connecting column 25 is arranged flush with the lower ends of the two corner columns 37.

[0075] In some embodiments, Figure 1 , 5 As shown in 12, the connecting column 25 and the four corner columns 37 all adopt an outer sleeve, and the cross-section of the outer sleeve is a tubular body with a circular, polygonal, D-shaped, elliptical or flat elliptical shape.

[0076] In some embodiments, in order to further facilitate the folding and unfolding process and improve the smoothness and controllability, such as Figure 8 , 13As shown, the left middle support 17 and the right middle support 18 are both provided with a transmission structure, which is respectively connected to any adjacent end of the two parallelograms. When one of the parallelograms moves, the other parallelogram is synchronously driven to move through the transmission structure. The movement direction is: when one of the parallelograms moves outward, the other parallelogram also moves outward, so that the two parallelograms move away from each other to achieve the expanded state; when one of the parallelograms moves inward, the other parallelogram also moves inward, so that the two parallelograms move closer to each other to achieve the stored state.

[0077] In this example, if Figure 8 , 13 As shown, the transmission structure includes a transmission gear 36, and linkage synchronization is performed through the transmission gear 36.

[0078] Of course, it can also be other structures, such as connecting rod transmission. All guide linkage structures applicable to the present disclosure can be applied to the present disclosure. For example, the guide linkage structures described in the patent number ZL 202320507408.2 and the patent name are a folding frame and a folding bicycle, all of which are within its protection scope and will not be listed one by one here.

[0079] In some embodiments, in order to provide support positioning, the base frame 6 can obtain a better flat state when it is unfolded, such as Figure 5 , 16 As shown in FIGS. 17 , the left connecting seat 14 and the right connecting seat 15 both adopt a groove-shaped member with an inverted U-shaped cross-section and an opening facing downward. Both ends of the groove-shaped member are provided with a limiting portion 27. When the base frame 6 is unfolded, the limiting portion 27 limits the upper side surfaces of the left and right side rods of the front frame portion 11 and the left and right side rods of the rear frame portion 12 in the downward direction.

[0080] Of course, other structures are also possible, such as Fig.18 , 19 As shown, the left connecting seat 14 and the right connecting seat 15 are both groove-shaped members with an inverted U-shaped cross section and an opening facing downwards, and both ends of the groove-shaped member are hingedly connected to the connecting head 28, and the connecting head 28 is fixedly connected with the corresponding side rods one by one, and the fixed connection can be, for example, riveted, screwed or welded, and the connecting head 28 is also provided with a limiting end 29 above the hinge axis. When the chassis 6 is in the unfolded state, the two ends of the connecting seat limit the left and right side rods of the front frame part 11 and the left and right side rods of the rear frame part 12 in the horizontal direction through the limiting end 29 of the connecting head 28. In this way, it has a better supporting and positioning effect, which is conducive to improving the supporting strength of the chassis 6.

[0081] In some embodiments, in order to increase the support and smooth movement effect of the left connecting seat 14 and the right connecting seat 15 when folding, as shown in FIG. Fig.15As shown, a connecting rod 30 is provided between the middle parts of the left connecting seat 14 and the right connecting seat 15, and the connecting rod 30 connects the left connecting seat 14 and the right connecting seat 15 together laterally. When the connecting rod 30 is pulled upward, the left connecting seat 14 and the right connecting seat 15 are simultaneously driven upward by the connecting rod 30 to fold the front frame portion 11 and the rear frame portion 12 relative to each other.

[0082] Of course, other structures are also possible, such as Fig.10 , 11 As shown, the cloth bag 31 of the folding bicycle connects the left connecting seat 14 and the right connecting seat 15 together horizontally, and a drawstring 34 is provided on the cloth bag 31. When the drawstring 34 is pulled upward, the left connecting seat 14 and the right connecting seat 15 are simultaneously driven upward through the cloth bag 31 to fold the front frame 11 and the rear frame 12 relative to each other.

[0083] Furthermore, the Velcro strap 32 on the bottom of the cloth bag 31 of the folding bicycle ties together the inner cross beam 10 on the inner side of the front frame 11 and the rear frame 12, or a connecting rod 30 is fixedly arranged between the left connecting seat 14 and the right connecting seat 15 in the horizontal direction, and the Velcro strap 32 is connected to the connecting rod 30; a drawstring 34 is arranged in the middle of the inner bottom surface of the cloth bag 31, and when the drawstring 34 is pulled upward, the cloth bag 31 will drive the left connecting seat 14 and the right connecting seat 15 to move upward so that the front frame 11 and the rear frame 12 are folded with each other. In this way, the assembly is very convenient and the manufacturing cost is low.

[0084] As can be seen from the above, the technical solution of the present disclosure proposes a folding bicycle, which is conducive to reducing the volume while maximizing the capacity. By taking an example, when manufacturing a specific product, the length of each component can be determined by optimizing the size matching, so that after folding, a regular bicycle can be obtained. Figure 1 , 2 , 3, and 4, and after unfolding, the following Figure 5 In the unfolded state shown in FIG. 1 , or in the case of installing the cloth bag 31, the following can be obtained: Fig. 9 , 10 In the unfolded state shown in FIG. 11 , the cloth bag 31 is located in a rectangular receiving frame formed by the front frame 2 , the rear frame 3 , the left frame 4 , the right frame 5 , and the bottom frame 6 .

[0085] When understanding the present invention, if necessary, the above structure can refer to other embodiments / appendices. Figure 1 And understand, no further elaboration here.

[0086] The above description is only an optional specific implementation manner of the present invention. All equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A foldable bicycle, comprising a wheel (1) and a foldable frame, wherein a detachable structure or a non-detachable structure is adopted between the wheel (1) and the frame, wherein the frame comprises a bottom frame (6), a front frame (2) arranged at the front side of the bottom frame (6), a rear frame (3) arranged at the rear side of the bottom frame (6), and side frames arranged at both sides of the bottom frame (6), wherein the two side frames are a left side frame (4) and a right side frame (5), and wherein: The front frame (2) and the rear frame (3) both adopt a square-shaped frame, and the left and right side rods of the front frame (2) and the left and right side rods of the rear frame (3) serve as four corner columns (37) at the four corners of the frame; The base frame (6) comprises a front frame portion (11), a rear frame portion (12) and two connecting seats arranged symmetrically on the left and right sides. An outer crossbeam (9) and an inner crossbeam (10) are arranged between the left side rod (7) and the right side rod (8) of the front frame portion (11) and between the left side rod (7) and the right side rod (8) of the rear frame portion (12). The front end of the left side rod (7) of the front frame portion (11) is fixed to the front frame (2) on the left corner column (37). ), the rear end of the left side rod (7) of the front frame (11) is hinged to the front end of the left connecting seat (14), the rear end of the left connecting seat (14) is hinged to the front end of the left side rod (7) of the rear frame (12), the rear end of the left side rod (7) of the rear frame (12) is hinged to the lower fixing seat (13) at the lower end of the left corner column (37) of the rear frame (3); the front end of the right side rod (8) of the front frame (11) is hinged to the front end of the left side rod (7) of the rear frame (12), and the rear end of the left side rod (7) of the rear frame (12) is hinged to the lower fixing seat (13) fixed at the lower end of the left corner column (37) of the rear frame (3); The frame (2) is fixedly arranged on a lower fixing seat (13) at the lower end of the right corner column (37), the rear end of the right side rod (8) of the front frame portion (11) is hinged to the front end of the right connecting seat (15), the rear end of the right connecting seat (15) is hinged to the front end of the right side rod (8) of the rear frame portion (12), and the rear end of the right side rod (8) of the rear frame portion (12) is hinged to the lower fixing seat (13) at the lower end of the right corner column (37) of the rear frame (3); Thus, a double-foldable foldable base frame (6) is formed; when a force is applied to the middle part of the base frame (6) to lift it up for storage and folding, the front frame part (11), the rear frame part (12) and the connecting seats can form a U-shaped storage space (16) with an opening facing downward, and at the same time, the front frame (2) and the rear frame (3) are synchronously linked and moved inward to be close to each other, and the front frame (2), the front frame part (11), the rear frame part (12) and the rear frame (3) are in a state of being distributed in sequence from front to back and close together; A left side frame (4) is arranged on the left outer side of the base frame (6), and a right side frame (5) is arranged on the right outer side of the base frame (6). The left side frame (4) and the right side frame (5) both include two parallelograms. On the same side, the two adjacent inner ends of the two parallelograms are hinged through a middle support. The outer ends of the two parallelograms are respectively hinged to the front frame (2) and the rear frame (3) through the lower fixed seat (13). The left side frame (4) corresponds to the left middle support (17), and the right side frame (5) corresponds to the right middle support (18). A rigid left hanging device (19) is arranged between the left middle support (17) and the middle part of the left connecting seat (14). The upper end of the left hanging device (19) is fixed on the left middle support (17). (19) A left guide structure (20) is vertically provided, a left matching structure (21) which cooperates with the left guide structure (20) is provided in the middle of the left connecting seat (14), and the left guide structure (20) also performs a lower limit on the left matching structure (21) to form a first limit, a rigid right lifting device (22) is provided between the middle of the right middle support (18) and the right connecting seat (15), the upper end of the right lifting device (22) is fixed on the right middle support (18), and the right lifting device (22) is vertically provided with a right guide structure (23), and a right matching structure (24) which cooperates with the right guide structure (23) is provided in the middle of the right connecting seat (15), and the right guide structure (23) also performs a lower limit on the right matching structure (24) to form a second limit; When the left side frame (4) and the right side frame (5) are in an unfolded state, the two parallelograms are distributed in an eight-shaped shape, and the left matching structure (21) moves to the lower stop point of the left guide structure (20) to form a first limit, and the right matching structure (24) moves to the lower stop point of the right guide structure (23) to form a second limit, so that the front frame part (11), the connecting seat, and the rear frame part (12) form a flat bottom frame (6), and at the same time, the left hanging device (19) and the right hanging device (22) hang the bottom frame (6) through the left connecting seat (14) and the right connecting seat (15) to finally form an unfolded state; When the frame is restored to be stored and folded, the middle part of the bottom frame (6) is pulled upwards, so that the front frame part (11) and the rear frame part (12) are relatively folded, and the left matching structure (21) moves upwards from the lower end along the left guide structure (20), and the right matching structure (24) moves upwards from the lower end along the right guide structure (23). At the same time, the front frame part (11) and the rear frame part (12) drive the front frame (2) and the rear frame (3) to move closer to each other, and the front frame (2) and the rear frame (3) move closer to each other, and the parallelogram of the left frame (4) and the right frame (5) moves closer to each other to lift the middle support, so that the front frame (2), the rear frame (3), the left frame (4), the right frame (5), the front frame part (11), and the rear frame part (12) move closer to each other and finally form a folded state.

2. The foldable bicycle according to claim 1, characterized in that: The left lifting device (19) is sheet-shaped or rod-shaped, and is vertically provided with a left guide groove or a left guide rod. A left guide column or a left guide sleeve is arranged in the middle of the left connecting seat (14), and the left guide column or the left guide sleeve is slidably matched with the left guide groove or the left guide rod. The right lifting device (22) is sheet-shaped or rod-shaped, and is vertically provided with a right guide groove or a right guide rod. A right guide column or a right guide sleeve is arranged in the middle of the right connecting seat (15), and the right guide column or the right guide sleeve is slidably matched with the right guide groove or the right guide rod.

3. The foldable bicycle according to claim 1, characterized in that: The lower parts of the front frame (2), the rear frame (3) and / or the lower ends of the four corner columns (37) are detachably connected to wheels (1), and when storage is required, the detached wheels (1) can be stored in the U-shaped storage space (16).

4. The foldable bicycle according to claim 3, characterized in that: A connecting column (25) is provided on the lower cross beam (26) of the front frame (2), the connecting column (25) is detachably connected to a wheel (1), and the lower ends of the two rear corner columns (37) are detachably connected to a wheel (1); or a connecting column (25) is provided on the lower cross beam (26) of the rear frame (3), the connecting column (25) is detachably connected to a wheel (1), and the lower ends of the two front corner columns (37) are detachably connected to a wheel (1); or a connecting column (25) is provided on both the lower cross beam (26) of the front frame (2) and the lower cross beam (26) of the rear frame (3), the connecting column (25) is detachably connected to a wheel (1); or the lower ends of the four corner columns (37) are detachably connected to a wheel (1).

5. The foldable bicycle according to claim 4, characterized in that: The connecting column (25) is fixedly arranged at the lower part of the lower cross beam (26) between the two corner columns (37), or at the front part of the lower cross beam (26), or at the rear part of the lower cross beam (26), or is cross-fixed with the lower cross beam (26), and the lower end of the connecting column (25) is arranged flush with the lower ends of the two corner columns (37).

6. The foldable bicycle according to claim 4 or 5, characterized in that: The connecting column (25) and the four corner columns (37) all adopt an outer sleeve, and the cross section of the outer sleeve is a tubular body with a circular, polygonal, D-shaped, elliptical or flat elliptical shape.

7. The foldable bicycle according to claim 1, characterized in that: The left middle support (17) and the right middle support (18) are both provided with a transmission structure, which is respectively connected to any adjacent ends of the two parallelograms. When one of the parallelograms moves, the other parallelogram is synchronously driven to move through the transmission structure. The movement direction is: when one of the parallelograms moves outward, the other parallelogram also moves outward, so that the two parallelograms move away from each other to achieve an unfolded state; when one of the parallelograms moves inward, the other parallelogram also moves inward, so that the two parallelograms move closer to each other to achieve a stored state.

8. The foldable bicycle according to claim 1, characterized in that: The left connecting seat (14) and the right connecting seat (15) both adopt a groove-shaped member with an inverted U-shaped cross section and an opening facing downwards, and both ends of the groove-shaped member are provided with a limiting portion (27). When the base frame (6) is unfolded, the limiting portion (27) forms a limit on the upper side of the left and right side rods of the front frame (11) and the left and right side rods of the rear frame (12) in the downward direction; or the left connecting seat (14) and the right connecting seat (15) both adopt a groove-shaped member with an inverted U-shaped cross section and an opening facing downwards, and both ends of the groove-shaped member are hingedly connected to a connecting head (28), and the connecting head (28) is fixedly connected to the corresponding side rod in a one-to-one correspondence, and a limiting end (29) is also provided on the upper side of the hinge shaft of the connecting head (28). When the base frame (6) is in the unfolded state, the two ends of the connecting seat form a limit on the left and right side rods of the front frame (11) and the left and right side rods of the rear frame (12) in the horizontal direction through the limiting end (29) of the connecting head (28).

9. The foldable bicycle according to claim 1 or 8, characterized in that: A connecting rod (30) is provided between the middle parts of the left connecting seat (14) and the right connecting seat (15), and the connecting rod (30) connects the left connecting seat (14) and the right connecting seat (15) together transversely. When the connecting rod (30) is pulled upward, the left connecting seat (14) and the right connecting seat (15) are simultaneously driven upward by the connecting rod (30) so that the front frame part (11) and the rear frame part (12) are folded with each other.

10. The foldable bicycle according to claim 1, characterized in that: The Velcro strap (32) on the bottom surface of the cloth bag (31) of the folding bicycle binds the inner cross beam (10) on the inner side of the front frame (11) and the rear frame (12) together, or a connecting rod (30) is fixedly arranged between the left connecting seat (14) and the right connecting seat (15) in the transverse direction, and the Velcro strap (32) is connected to the connecting rod (30); a drawstring (34) is arranged in the middle of the inner bottom surface of the cloth bag (31); when the drawstring (34) is pulled upward, the cloth bag (31) drives the left connecting seat (14) and the right connecting seat (15) to move upward so that the front frame (11) and the rear frame (12) are folded relative to each other.

11. The foldable bicycle according to claim 1, characterized in that: The foldable bicycle further comprises a handle (35), and a user drives the foldable bicycle to move by means of the handle (35). When the front frame (2), the front frame portion (11), the rear frame portion (12) and the rear frame (3) are in a state of being arranged in sequence from the front to the rear and being closed together, a receiving recess with the front frame (2) as the mouth and the front frame portion (11) as the bottom is formed between the front frame (2) and the front frame portion (11), and / or a receiving recess with the rear frame (3) as the mouth and the rear frame portion (12) as the bottom is formed between the rear frame (3) and the rear frame portion (12). The receiving recess can receive the handle (35) for storage.

12. The foldable bicycle according to claim 1, characterized in that: The lower parts of the front frame (2), the rear frame (3) and / or the lower ends of the four corner columns (37) are respectively provided with wheels (1) in an undetachable manner. When folded and stored, the wheels (1) are closed together in the front-to-back direction. When unfolded, the wheels (1) are unfolded in the front-to-back direction.

13. The foldable bicycle according to claim 12, characterized in that: The wheels (1) are four in number, which are arranged in the form of two universal wheels at the front and two fixed wheels at the rear, or in the form of two universal wheels at the rear and two fixed wheels at the front, or in the form of two universal wheels at the front and two universal wheels at the rear.

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