Folding bicycle reinforcing bottom support and folding bicycle

Abstract

The folding bicycle reinforcing bottom support comprises at least four stand column lower fixing bases arranged in a rectangular mode and at least one bottom support assembly, each bottom support assembly comprises a middle support and a supporting rod unit movably connected between the corresponding stand column lower fixing base and the middle support, and each middle support comprises a connecting part; one end of the supporting rod unit far away from the column lower fixing seat is movably connected with the connecting part; by the adoption of the method, through the design of the sliding grooves, motion stroke difference compensation is achieved when the two non-parallel supporting rods are unfolded or folded; in the unfolding state, the top supporting rod abuts against the top of the connecting part, meanwhile, the bottom supporting rod abuts against the bottom side of the connecting part through the abutting device, an up-down dual-supporting structure is formed, stress is dispersed, the rigidity and the bearing capacity of the bottom support assembly are greatly improved, and compared with the prior art, the cost of a supporting frame is saved; in addition, compared with the prior art, the whole bottom support assembly can be smoother, and goods can be placed more conveniently.

Description

Technical Field

[0001] This invention relates to the field of foldable vehicle technology, and in particular to a reinforced base bracket for foldable vehicles and a foldable vehicle itself. Background Technology

[0002] Folding bikes are essential everyday carrying tools. For example, when camping outdoors, people often need to use folding bikes to transport camping supplies to the site. Existing folding bike frames are usually single-layered with a cross-shaped design. When the load-bearing requirements are high, this structure has poor load-bearing capacity. To address this, engineers have modified the frame support rods to be double-layered, as illustrated by Chinese invention patent publication number CN220130172U, which discloses a camping bike folding frame. This frame includes a connecting seat, several upper support rods, and several lower support rods. The lower support rods are positioned below the upper support rods, and each lower support rod is hinged to the connecting seat at the end closest to it. The upper support rods have an unfolded position and a folded position relative to the connecting seat. When the upper support rods are in the unfolded position, the ends of both the upper and lower support rods away from the connecting seat extend outwards. When the upper support rods are in the folded position, the ends of both the upper and lower support rods away from the connecting seat move inwards. The folding frame of this invention has a stronger load-bearing capacity and better stability. However, the inventors discovered during actual use that the upper support rod of this structure can rotate freely up and down relative to the connecting seat. To achieve stable support performance, a support frame is required. The upper and lower support rods are connected by the support frame to limit the sinking of the entire base frame. In this way, a support frame needs to be set for each upper and lower support rod, which increases the overall cost of the product. At the same time, since the upper support rod can rotate freely up and down relative to the connecting seat, if the upper support rod is in a relatively horizontal state, it is easy to sink under the pressure of gravity. Therefore, in this solution, the upper support rod needs to be tilted upward at a certain angle so that the entire base frame is arched in the middle to overcome the problem of sinking more easily in a relatively horizontal state. However, this method will greatly affect the placement of goods and the design is not reasonable.

[0003] Therefore, there is an urgent need to design a reinforced base frame for folding vehicles and a folding vehicle in order to overcome the shortcomings of one or more of the existing technologies mentioned above. Summary of the Invention

[0004] The technical solution adopted by the present invention to achieve the above-mentioned technical objectives is: a folding vehicle reinforced bottom support, characterized in that it includes: at least four column lower fixing seats arranged in a rectangular shape and at least one bottom support assembly, the bottom support assembly including a middle support and a support rod unit movably connected between the column lower fixing seats and the middle support, the middle support including a connecting part, and the end of the support rod unit away from the column lower fixing seat being inserted into the connecting part; Each support rod unit includes: a first support rod and a second support rod, which are stacked at intervals along the vertical direction and are not arranged in parallel when the base support assembly is fully extended. One end of the first support rod and the second support rod is hinged to the lower fixed seat of the column. One of the first support rod and the second support rod is a sliding rod, and the other is a hinged rod. The sliding rod is slidably hinged to the middle support through a sliding groove, and the hinged rod is hinged to the middle support. The two ends of the sliding groove are the end point of the extension stroke and the end point of the folding stroke, respectively. The second support rod is provided with a stop device at one end near the middle support. When the bottom support assembly is in the fully extended state, the top side of the first support rod abuts against the top wall of the connecting part, and the stop device abuts against the bottom side of the connecting part.

[0005] In a preferred embodiment, the slide groove is located on the top of the side wall of the connecting part, one end of the first support rod adjacent to the middle support is slidably hinged to the slide groove via a pin, the second support rod is hinged to the middle support, and the first support rod can slide relative to the middle support when unfolded or folded.

[0006] In a preferred embodiment, the slide groove is located at the bottom of the side wall of the connecting part, and one end of the second support rod adjacent to the middle support is slidably hinged to the slide groove via a pin. The first support rod is hinged to the middle support, and the second support rod can slide relative to the middle support when unfolded or folded.

[0007] In a preferred embodiment, the slide groove is provided at one end of the first support rod adjacent to the middle support, the first support rod is slidably hinged to the middle support via a pin, and the second support rod is hinged to the middle support; Alternatively, the groove may be located at one end of the second support rod adjacent to the middle support, the second support rod may be slidably hinged to the middle support via a pin, and the first support rod may be hinged to the middle support; the first support rod or the second support rod may slide relative to the middle support when unfolded or folded.

[0008] In a preferred embodiment, both the first support rod and the second support rod have a sheath at one end adjacent to the middle support; the sliding groove is provided on the sheath of the first support rod and the corresponding first support rod, the middle support is slidably hinged to the first support rod by a pin, and the second support rod is hinged to the middle support; or the sliding groove is provided on the sheath of the second support rod and the corresponding second support rod, the middle support is slidably hinged to the second support rod by a pin, and the first support rod is hinged to the middle support.

[0009] In a preferred embodiment, the groove is a straight groove or a curved groove, the angle between the straight groove and the horizontal plane is less than 90°, and the curved groove is an arc groove or an L-shaped zigzag groove.

[0010] In a preferred embodiment, the groove is a straight groove that extends along the length direction of the corresponding sliding rod.

[0011] In a preferred embodiment, the blocking device is a convex structure integrally formed, welded, bolted, or snap-fitted to the end of the second support rod.

[0012] This application also provides a reinforced bottom support for a folding vehicle, characterized in that it includes: at least four rectangularly arranged column lower fixing seats and at least one bottom support assembly, the bottom support assembly including a middle support and a support rod unit movably connected between the column lower fixing seats and the middle support, the middle support including a connecting part, and the end of the support rod unit away from the column lower fixing seat being inserted into the connecting part; Each support rod unit includes: a first support rod and a second support rod, which are stacked at intervals along the vertical direction and are not arranged in parallel when the base support assembly is fully extended. One end of the first support rod and the second support rod is hinged to the connecting part. One of the first support rod and the second support rod is a sliding rod, and the other is a hinged rod. The lower fixing seat of the column is provided with a sliding groove. The sliding rod is slidably connected to the sliding groove, and the hinged rod is hinged to the lower fixing seat of the column. The two ends of the sliding groove are the end point of the extension stroke and the end point of the folding stroke, respectively. The second support rod is provided with a stop device at one end near the middle support. When the bottom support assembly is in the fully extended state, the top side of the first support rod abuts against the top wall of the middle support, and the stop device abuts against the bottom of the middle support.

[0013] In a preferred embodiment, the slide groove is provided at one end of the first support rod adjacent to the lower fixing seat of the column, the lower fixing seat of the column is slidably hinged to the first support rod by a pin, and the second support rod is hinged to the lower fixing seat of the column; Alternatively, the sliding groove may be located at one end of the second support rod adjacent to the lower fixing seat of the column, and the lower fixing seat of the column may be slidably hinged to the second support rod via a pin, and the first support rod may be hinged to the lower fixing seat of the column; the first support rod or the second support rod may slide relative to the lower fixing seat of the column when unfolded or folded.

[0014] In a preferred embodiment, both the first support rod and the second support rod have a protective sleeve at one end adjacent to the lower fixing seat of the column; the sliding groove is provided on the protective sleeve of the first support rod and the corresponding first support rod, the lower fixing seat of the column is slidably hinged to the first support rod by a pin, and the second support rod is hinged to the lower fixing seat of the column; or the sliding groove is provided on the protective sleeve of the second support rod and the corresponding second support rod, the lower fixing seat of the column is slidably hinged to the second support rod by a pin, and the first support rod is hinged to the lower fixing seat of the column.

[0015] On the other hand, a folding bicycle is provided, characterized in that the folding bicycle includes a folding bicycle reinforcing base bracket as described in any of the above embodiments and a frame column provided on the lower fixing seat of each of the columns, the top of the frame column is fixedly provided with an upper fixing seat, the middle of the frame column is slidably provided with a column slide seat, and side brackets are connected between adjacent frame columns through the upper fixing seat and the column slide seat, and the side brackets are foldable.

[0016] The beneficial effects of this invention are as follows: the design of the sliding groove enables compensation for the difference in movement stroke between the two non-parallel support rods during unfolding or folding, ensuring smooth unfolding or folding; and in the unfolded state, the top support rod abuts against the top of the connecting part, while the bottom support rod abuts against the bottom side of the connecting part through the abutting device, forming a double support structure, which disperses stress and greatly enhances the rigidity and load-bearing capacity of the base support assembly. This effectively solves the problem of stress concentration in the prior art, which easily leads to sinking and deformation under heavy loads. Compared with the prior art, it saves the cost of the support frame and makes the entire base support assembly flatter and easier to place goods. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the second embodiment of the present invention; Figure 3 This is an exploded view of the second embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the fourth embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the fifth embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the seventh embodiment of the present invention; Figure 7 This is a diagram showing the folded state of the second embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the sixth embodiment of the present invention; Figure 9This is a schematic diagram of the structure of the eighth embodiment of the present invention.

[0018] In the picture: 10. Lower support for the column; 11. Bottom bracket assembly; 111. Middle support; 112. Support rod unit; 113. First support rod; 114. Second support rod; 115. Connecting part; 116. Pin; 17. Sheath; 18. Slide groove; 19. Stopping device; 20. Frame column; 21. Upper support for the column; 22. Column slide; 23. Side bracket. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0021] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0022] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the invention include a particular feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] First embodiment: like Figure 1 , Figure 7 As shown, the present invention provides a reinforcing base support for a folding bicycle, comprising four rectangularly arranged column lower fixing seats 10 (corresponding to the four corners of the folding bicycle frame: left front, right front, left rear, and right rear), and a base support assembly 11. The base support assembly 11 includes a central support 111 and support rod units 112 movably connected between each column lower fixing seat 10 and the central support 111. The central support 111 includes a connecting portion 115 corresponding to the number of support rod units 112. The end and bottom opening of the connecting portion 115 are hollow. The connecting portion 115 has a U-shaped groove structure. The end portion of the support rod unit 112 away from the column lower fixing seat 10 is inserted into the inner cavity of the connecting portion 115, thereby achieving radial limiting and sliding guidance through the connecting portion 115.

[0025] Each support rod unit 112 includes a first support rod 113 and a second support rod 114. The first support rod 113 is located above the second support rod 114, and the two are stacked vertically at intervals. When the base support assembly 11 is fully deployed, the first support rod 113 and the second support rod 114 are not arranged in parallel, forming an irregular trapezoidal support structure, which improves the anti-overturning and load-bearing capacity. One end of the first support rod 113 and the second support rod 114 are both hinged to the corresponding column lower fixing seat 10 through a hinge shaft, and the two can rotate independently around the corresponding hinge shaft.

[0026] In this embodiment, the first support rod 113 is a sliding rod, and the second support rod 114 is a hinged rod. Each connecting part 115 has corresponding grooves 18 on the top of its left and right side walls. The sliding rod is slidably hinged to the groove 18 via a pin 116. The two ends of the groove 18 are the end point of the unfolding stroke and the end point of the folding stroke, respectively. That is, when the pin 116 is at the end point of the unfolding stroke, the bottom support assembly 11 is in a fully unfolded state; when the pin 116 is at the end point of the folding stroke, the bottom support assembly 11 is in a fully folded state. When the first support rod 113 unfolds or folds, it can slide relative to the middle support 111 through the cooperation of the pin 116 and the groove 18, achieving stroke compensation and avoiding motion interference and jamming, so that the first support rod 113 and the second support rod 114 can unfold or fold smoothly. One end of the second support rod 114 adjacent to the middle support 111 is hinged to the side wall of the connecting part 115, and the hinge point is located diagonally below the groove 18.

[0027] The second support rod 114 is provided with a stop device 19 at one end near the middle support 111. The stop device 19 is a convex structure integrally formed at the end of the second support rod 114, and the stop device 19 is located outside the connecting part 115, without structural interference with the sliding groove 18 and the pin 116. When the bottom support assembly 11 is in the fully extended state, the top side of the first support rod 113 contacts and abuts against the top wall surface of the connecting part 115, and the stop device 19 contacts and abuts against the bottom side surface of the connecting part 115, forming a double rigid support in both upper and lower directions, restricting the sinking path of the bottom support assembly 11. The blocking device 19 abuts against the connecting part 115 from the outside. To prevent the angle of the second support rod 114 from being too large when the blocking device 19 abuts against the connecting part 115, which would result in a large included angle between the first support rod 113 and the connecting seat and prevent them from abutting, a chamfer is provided on the bottom side of the end of the connecting part 115. The chamfer can, to a certain extent, avoid the movement path of the blocking device 19, so that the second support rod 114 can rotate to a predetermined angle before the blocking device 19 abuts against the connecting part 115, thus ensuring that the first support rod 113 and the connecting seat can abut against each other to form support. In addition, to avoid stress concentration due to the small contact area between the chamfer of the connecting part 115 and the blocking device 19, a groove can be provided on the chamfer. When the blocking device 19 abuts against the connecting part 115, it is located in the groove, which increases the contact area, disperses stress, and improves the load-bearing capacity.

[0028] It should be noted that the groove 18 is a straight groove, and the angle between the straight groove and the horizontal plane is less than 90°. The smaller the angle, the greater the supporting force of the groove 18 on the first support rod 113 in the vertical direction, and thus the greater the supporting force generated when it abuts against the connecting part 115. In this embodiment, the groove 18 can also be an arc groove or an L-shaped zigzag groove, which can be determined according to the actual use requirements.

[0029] The blocking device 19 can also be fixedly connected to the end of the second support rod 114 by welding, bolting, snap-fitting, etc. In the bolting method, the blocking device 19 is locked to the bottom surface of the end of the second support rod 114 by bolts. In the snap-fitting method, the end of the second support rod 114 is provided with a matching slot, and the blocking device 19 is fixed by the interlocking of the buckle and the slot. Both methods can achieve the same blocking and support effect.

[0030] Movement process: When the base support assembly 11 is fully extended, the pin 116 at the end of the first support rod 113 slides to the end of the extension stroke of the slide groove 18, and the top side of the first support rod 113 rigidly abuts against the top wall of the connecting part 115. At the same time, the blocking device 19 at the end of the second support rod 114 rigidly abuts against the bottom side of the connecting part 115. The two abutting surfaces together restrict the vertical displacement of the middle support 111, which greatly improves the load-bearing capacity and deformation resistance of the base support, avoids the support rod bending and instability under heavy load, solves the problem of insufficient rigidity of the existing single support rod, and because the top of the connecting part 115 is closed, the top plane of the first support rod 113 and the connecting part 115 can remain relatively parallel, making the top surface of the entire base support flatter than the existing technology, and making it easier to place goods.

[0031] When folding, the middle support 111 is raised upwards, and the pin 116 of the first support rod 113 slides along the slide groove 18 to the end of the folding stroke, automatically compensating for the difference in the movement stroke during the folding process and avoiding structural interference; the first support rod 113 and the second support rod 114 rotate upwards synchronously around the hinge axis of the lower fixed seat 10 of the column, and the two gradually approach each other, finally completing the folding. After folding, the structure is compact and has no redundant space occupation.

[0032] It should be noted that a sliding hinge refers to a hinged connection structure that achieves both relative sliding and rotation around the pin 116 by cooperating with the sliding groove 18.

[0033] Second embodiment: like Figures 2-3 As shown, the core difference between this embodiment and Embodiment 1 lies only in the setting position of the slide groove 18 and the correspondence between the sliding rod and the hinge rod. The other unmentioned structures, connection relationships, and working principles are completely consistent with Embodiment 1, and will not be repeated here.

[0034] In this embodiment, the slide groove 18 is formed at the bottom of the left and right side walls of each connecting part 115. The second support rod 114 is a sliding rod, and one end of it adjacent to the middle support 111 is slidably hinged to the slide groove 18 through the pin 116. The two ends of the slide groove 18 are the end point of the unfolding stroke and the end point of the folding stroke, respectively. That is, when the pin 116 is at the end point of the unfolding stroke, the bottom support assembly 11 is in a fully unfolded state. When the pin 116 is at the end point of the folding stroke, the bottom support assembly 11 is in a fully folded state. The second support rod 114 can slide relative to the middle support 111 when unfolding or folding. The first support rod 113 is a hinge rod, and one end of it adjacent to the middle support 111 is hinged to the side wall of the connecting part 115. The hinge point is located diagonally above the slide groove 18.

[0035] To ensure precise contact in the unfolded state, the hinge point between the first support rod 113 and the connecting part 115 is determined according to the volume of the first support rod 113, ensuring that the top side of the first support rod 113 can contact the top wall of the connecting part 115 when fully unfolded.

[0036] Third embodiment: The only difference between this embodiment and Embodiment 1 is the location of the slide 18. All other unmentioned structures, connections, and working principles are completely consistent with Embodiment 1 and will not be repeated here.

[0037] In this embodiment, a groove 18 is provided at one end of the first support rod 113 near the middle support 111. The groove 18 is a straight groove that extends along the length of the first support rod 113. The two ends of the groove 18 are the end point of the unfolding stroke and the end point of the folding stroke, respectively. That is, when the pin 116 is at the end point of the unfolding stroke, the bottom support assembly 11 is in a fully unfolded state, and when the pin 116 is at the end point of the folding stroke, the bottom support assembly 11 is in a fully folded state. The pin 116 is fixedly provided on the side wall of the connecting part 115. The pin 116 passes through the groove 18 on the first support rod 113 and is slidably hinged to the first support rod 113. The first support rod 113 can slide relative to the middle support 111 when unfolding or folding to achieve stroke compensation. One end of the second support rod 114 near the middle support 111 is hinged to the side wall of the connecting part 115.

[0038] Fourth embodiment: like Figure 4 As shown, the only difference between this embodiment and Embodiment 1 is the location of the slide groove 18. All other unmentioned structures, connections, and working principles are completely consistent with Embodiment 1 and will not be repeated here.

[0039] In this embodiment, a groove 18 is provided at one end of the second support rod 114 near the middle support 111. The groove 18 is a straight groove that extends along the length of the second support rod 114. The two ends of the groove 18 are the end point of the unfolding stroke and the end point of the folding stroke, respectively. That is, when the pin 116 is at the end point of the unfolding stroke, the bottom support assembly 11 is in a fully unfolded state, and when the pin 116 is at the end point of the folding stroke, the bottom support assembly 11 is in a fully folded state. The pin 116 is fixedly provided on the side wall of the connecting part 115. The pin 116 passes through the groove 18 on the second support rod 114 and is slidably hinged to the second support rod 114. The second support rod 114 can slide relative to the middle support 111 when unfolding or folding to achieve stroke compensation. One end of the first support rod 113 near the middle support 111 is hinged to the side wall of the connecting part 115.

[0040] Fifth embodiment: like Figure 5 As shown, the only difference between this embodiment and Embodiment 1 is the location of the slide groove 18. All other unmentioned structures, connections, and working principles are completely consistent with Embodiment 1 and will not be repeated here.

[0041] In this embodiment, a wear-resistant sleeve 17 is fixedly sleeved at one end of the first support rod 113 and the second support rod 114 adjacent to the middle support 111. The sleeve 17 is fixed with the corresponding support rod by interference fit, and there is no relative displacement between the two. When the first support rod 113 is a sliding rod, the sliding groove 18 is provided on the sleeve 17 of the first support rod 113 and the rod body of the first support rod 113. It is a through groove that connects the sleeve 17 and the rod body. The fixing pin 116 of the middle support 111 passes through the through sliding groove 18 and is slidably hinged to the first support rod 113. When the second support rod 114 is a sliding rod, the sliding groove 18 is provided on the sleeve 17 of the second support rod 114 and the rod body of the second support rod 114. It is a through groove that connects the sleeve 17 and the rod body. The fixing pin 116 of the middle support 111 passes through the through sliding groove 18 and is slidably hinged to the second support rod 114.

[0042] The slide groove 18 is a straight groove that extends along the length of the corresponding sliding rod. The two ends of the slide groove 18 are the end point of the unfolding stroke and the end point of the folding stroke, respectively. That is, when the pin 116 is at the end point of the unfolding stroke, the bottom support assembly 11 is in a fully unfolded state, and when the pin 116 is at the end point of the folding stroke, the bottom support assembly 11 is in a fully folded state.

[0043] Sixth embodiment: like Figure 8As shown, the difference between this embodiment and the first embodiment lies only in the number of column lower fixing seats 10 and bottom support components 11. In this embodiment, there are six column lower fixing seats 10, which are arranged in a rectangular shape and opposite each other in pairs. For ease of description, the two at one end are defined as the front column lower fixing seats 10, the two in the middle are defined as the middle column lower fixing seats 10, and the two at the rear are defined as the rear column lower fixing seats 10. There are two bottom support components 11, one of which is hinged to the front and middle column lower fixing seats 10, and the other is hinged to the middle and rear column lower fixing seats 10. The structure, connection relationship, and working principle of each bottom support component 11 can adopt the scheme described in any one of embodiments 1-5.

[0044] Seventh embodiment: like Figure 6 As shown, this embodiment is a parallel independent technical solution. The folding bike reinforced bottom support of this embodiment includes four rectangularly arranged column lower fixing seats 10 and a bottom support assembly 11. The bottom support assembly 11 includes a middle support 111 and a support rod unit 112 movably connected between each column lower fixing seat 10 and the middle support 111. The middle support 111 includes a connecting part 115 corresponding to the number of support rod units 112. The end and bottom opening of the connecting part 115 are hollow. The connecting part 115 has a U-shaped groove structure. The end portion of the support rod unit 112 away from the column lower fixing seat 10 is inserted into the inner cavity of the connecting part 115.

[0045] Each support rod unit 112 includes a first support rod 113 and a second support rod 114. The first support rod 113 is located above the second support rod 114. The two are stacked vertically at intervals and are not arranged in parallel when the bottom support assembly 11 is fully extended. One end of the first support rod 113 and the second support rod 114 are both hinged to the connecting part 115 through a hinge shaft, and the two can rotate independently around the hinge shaft.

[0046] In this embodiment, the first support rod 113 is a sliding rod, and the second support rod 114 is a hinged rod. The column lower fixing seat 10 is provided with a sliding groove 18. The sliding rod is slidably hinged to the sliding groove 18 through the pin 116. The two ends of the sliding groove 18 are the end point of the unfolding stroke and the end point of the folding stroke, respectively. That is, when the pin 116 is at the end point of the unfolding stroke, the bottom support assembly 11 is in a fully unfolded state. When the pin 116 is at the end point of the folding stroke, the bottom support assembly 11 is in a fully folded state. The hinged rod is hinged to the column lower fixing seat 10.

[0047] The second support rod 114 is provided with a stop device 19 at one end near the middle support 111. The stop device 19 is a convex structure integrally formed at the end of the second support rod 114, and the stop device 19 is located outside the connecting part 115, without structural interference with the sliding groove 18 and the pin 116. When the bottom support assembly 11 is in the fully extended state, the top side of the first support rod 113 contacts and abuts against the top wall surface of the connecting part 115, and the stop device 19 contacts and abuts against the bottom side surface of the connecting part 115, forming a double rigid support in both upper and lower directions, restricting the sinking path of the bottom support assembly 11. The blocking device 19 abuts against the connecting part 115 outside the connecting part 115. To avoid the second support rod 114 having an excessively large angle when the blocking device 19 abuts against the connecting part 115, resulting in a large included angle between the first support rod 113 and the connecting seat, which would prevent them from abutting, a chamfer is provided on the bottom side of the end of the connecting part 115. The chamfer can, to a certain extent, avoid the movement path of the blocking device 19, so that the second support rod 114 can rotate to a predetermined angle before the blocking device 19 abuts against the connecting part 115, thus ensuring that the first support rod 113 and the connecting seat can abut against each other to form support. In addition, to avoid stress concentration caused by the small contact area between the chamfer of the connecting part 115 and the blocking device 19, a groove can be provided on the chamfer, and the blocking device 19 is located in the groove when it abuts against the connecting part 115.

[0048] In this embodiment, in an alternative solution, the second support rod 114 can be a sliding rod, the first support rod 113 can be a hinged rod, and the position of the sliding groove 18 corresponds to the second support rod 114. This alternative solution can also achieve the same technical effect.

[0049] In other alternatives, the slide groove 18 may be provided on one end of the first support rod 113 or the second support rod 114 near the lower fixing seat 10 of the column; if a sleeve 17 is provided on one end of the first support rod 113 and / or the second support rod 114 near the lower fixing seat 10 of the column, the slide groove 18 is provided on the sleeve 17 of one of them and on the corresponding support rod.

[0050] Eighth embodiment: like Figure 9 As shown, this embodiment discloses a folding vehicle, including a folding vehicle reinforced base bracket as described in any one of embodiments 1-7, and a frame column 20 matching the number of column lower fixing seats 10.

[0051] The bottom of each frame column 20 is fixedly installed on the corresponding lower column fixing seat 10. The top of the frame column 20 is fixedly provided with an upper column fixing seat 21. The middle of the frame column 20 is slidably provided with a column slide seat 22, which can slide up and down along the axial direction of the frame column 20. Between two adjacent frame columns 20, a side bracket 23 is connected through the upper column fixing seat 21 and the column slide seat 22. The side bracket 23 is a foldable X-shaped cross linkage structure. The upper end of the side bracket 23 is hinged to the corresponding upper column fixing seat 21, and the lower end of the side bracket 23 is hinged to the corresponding column slide seat 22. The side brackets 23 are all foldable.

[0052] When folding, lift the center support 111 upwards by hand. The center support 111 drives the support rod unit 112 to move upwards. At the same time, the column lower fixing seat 10 connected to the outer end of the support rod unit 112 moves the frame column 20 towards the center support 111. Then, the column slide 22 slides upwards along the frame column 20, driving the X-shaped cross side bracket 23 to move towards the center support 111, completing the folding action of the bottom bracket assembly 11 and realizing the synchronous folding of the whole vehicle. When unfolding, grab the diagonal frame columns 20 with both hands and pull them outwards in the opposite direction to the center support 111. At this time, the column slide 22 connected to the frame column 20 slides downwards along the frame column 20 to the limit position. The support rod unit 112 and the side bracket 23 unfold completely with the frame column 20 to form a rigid support. With the double support structure of the bottom bracket, the structural stability and load-bearing capacity of the whole vehicle frame are greatly improved.

[0053] In summary, the design of the sliding groove compensates for the difference in travel between the two non-parallel support rods during unfolding or folding, ensuring smooth unfolding or folding. Furthermore, in the unfolded state, the top support rod abuts against the top of the connecting part, while the bottom support rod abuts against the bottom side of the connecting part via a stop device, forming a double-support structure that disperses stress, greatly enhancing the rigidity and load-bearing capacity of the base support assembly. This effectively solves the problem of stress concentration leading to sinking and deformation under heavy loads in existing technologies. Compared to existing technologies, it eliminates the cost of the support frame, facilitating assembly and production, and also makes the entire base support assembly flatter and easier to place goods.

[0054] The present invention is not limited to the description in the specification and embodiments, and thus other advantages and modifications can be readily realized by those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices and illustrated examples shown and described herein without departing from the spirit and scope of the general concept as defined by the claims and their equivalents.

Claims

1. A reinforced base bracket for a folding vehicle, characterized in that, include: At least four rectangularly arranged column bases and at least one base support assembly, the base support assembly including a middle support and a support rod unit movably connected between the column bases and the middle support, the middle support including a connecting part, and the end of the support rod unit away from the column bases being connected to the connecting part being movably connected. Each support rod unit includes: a first support rod and a second support rod, which are stacked at intervals along the vertical direction and are not arranged in parallel when the base support assembly is fully extended. One end of the first support rod and the second support rod is hinged to the lower fixed seat of the column. One of the first support rod and the second support rod is a sliding rod, and the other is a hinged rod. The sliding rod is slidably hinged to the middle support through a sliding groove, and the hinged rod is hinged to the middle support. The two ends of the sliding groove are the end point of the extension stroke and the end point of the folding stroke, respectively. The second support rod is provided with a stop device at one end near the middle support. When the bottom support assembly is in the fully extended state, the top side of the first support rod abuts against the top wall of the connecting part, and the stop device abuts against the bottom side of the connecting part.

2. The folding vehicle reinforced bottom bracket according to claim 1, characterized in that, The slide groove is located on the top of the side wall of the connecting part. One end of the first support rod adjacent to the middle support is slidably hinged to the slide groove via a pin. The second support rod is hinged to the middle support. The first support rod can slide relative to the middle support when it is unfolded or folded.

3. The folding vehicle reinforced bottom bracket according to claim 1, characterized in that, The slide groove is located at the bottom of the side wall of the connecting part. One end of the second support rod adjacent to the middle support is slidably hinged to the slide groove via a pin. The first support rod is hinged to the middle support. The second support rod can slide relative to the middle support when it is unfolded or folded.

4. The folding vehicle reinforced bottom bracket according to claim 1, characterized in that, The slide groove is located at one end of the first support rod adjacent to the middle support. The first support rod is slidably hinged to the middle support via a pin, and the second support rod is hinged to the middle support. Alternatively, the groove may be located at one end of the second support rod adjacent to the middle support, the second support rod may be slidably hinged to the middle support via a pin, and the first support rod may be hinged to the middle support; the first support rod or the second support rod may slide relative to the middle support when unfolded or folded.

5. The folding vehicle reinforced bottom bracket according to claim 1, characterized in that, Both the first support rod and the second support rod have a protective sleeve at one end adjacent to the middle support. The sliding groove is provided on the protective sleeve of the first support rod and the corresponding first support rod. The middle support is slidably hinged to the first support rod by a pin, and the second support rod is hinged to the middle support. Alternatively, the sliding groove is provided on the protective sleeve of the second support rod and the corresponding second support rod. The middle support is slidably hinged to the second support rod by a pin, and the first support rod is hinged to the middle support.

6. The folding vehicle reinforcing base bracket according to claim 2 or 3, characterized in that, The groove is a straight groove or a curved groove. The angle between the straight groove and the horizontal plane is less than 90°. The curved groove is an arc-shaped groove or an L-shaped zigzag groove.

7. The folding vehicle reinforcing base bracket according to claim 4 or 5, characterized in that, The groove is a straight groove that extends along the length of the corresponding sliding rod.

8. The folding vehicle reinforced bottom bracket according to claim 1, characterized in that, The blocking device is a convex structure integrally formed, welded, bolted, or snap-fitted to the end of the second support rod.

9. A reinforced base bracket for a folding vehicle, characterized in that, include: At least four rectangularly arranged column bases and at least one base support assembly, the base support assembly including a middle support and a support rod unit movably connected between the column bases and the middle support, the middle support including a connecting part, and the end of the support rod unit away from the column bases being connected to the connecting part being movably connected. Each support rod unit includes: a first support rod and a second support rod, which are stacked at intervals along the vertical direction and are not arranged in parallel when the base support assembly is fully extended. One end of the first support rod and the second support rod is hinged to the connecting part. One of the first support rod and the second support rod is a sliding rod, and the other is a hinged rod. The lower fixing seat of the column is provided with a sliding groove. The sliding rod is slidably connected to the sliding groove, and the hinged rod is hinged to the lower fixing seat of the column. The two ends of the sliding groove are the end point of the extension stroke and the end point of the folding stroke, respectively. The second support rod is provided with a stop device at one end near the middle support. When the bottom support assembly is in the fully extended state, the top side of the first support rod abuts against the top wall of the middle support, and the stop device abuts against the bottom of the middle support.

10. The folding vehicle reinforced bottom bracket according to claim 9, characterized in that, The slide groove is located at one end of the first support rod near the lower fixing seat of the column. The lower fixing seat of the column is slidably hinged to the first support rod via a pin. The second support rod is hinged to the lower fixing seat of the column. Alternatively, the sliding groove may be located at one end of the second support rod adjacent to the lower fixing seat of the column, and the lower fixing seat of the column may be slidably hinged to the second support rod via a pin, and the first support rod may be hinged to the lower fixing seat of the column; the first support rod or the second support rod may slide relative to the lower fixing seat of the column when unfolded or folded.

11. The folding vehicle reinforced bottom bracket according to claim 9, characterized in that, Both the first support rod and the second support rod have a protective sleeve at one end adjacent to the lower fixing seat of the column; the sliding groove is provided on the protective sleeve of the first support rod and the corresponding first support rod, the lower fixing seat of the column is slidably hinged to the first support rod by a pin, and the second support rod is hinged to the lower fixing seat of the column, or the sliding groove is provided on the protective sleeve of the second support rod and the corresponding second support rod, the lower fixing seat of the column is slidably hinged to the second support rod by a pin, and the first support rod is hinged to the lower fixing seat of the column.

12. A folding bicycle, characterized in that, The folding vehicle includes a folding vehicle reinforced base bracket as described in any one of claims 1-11 and a frame column provided on the lower fixed seat of each of the columns. The top of the frame column is fixedly provided with an upper fixed seat, and the middle is slidably provided with a column slide. Adjacent frame columns are connected by side brackets through the upper fixed seat and the column slide. The side brackets are foldable.

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