Folding frame and folding bicycle

Abstract

The utility model discloses a folding frame and folding bicycle belong to bicycle technical field, to solve the problem that the existing folding bicycle cannot be directly pushed after folding and designs. The utility model discloses a folding frame includes: first frame body, including pipe axle and auxiliary wheel, when pipe axle rotates around the own axis, auxiliary wheel can rotate with pipe axle synchronously, second frame body and rotary connector, when folding frame is in the unfolded state, auxiliary wheel is in the air, when folding frame is in the folding state, auxiliary wheel touches the ground, and auxiliary wheel can support folding frame with wheel and be in the standing state and walking state. The utility model discloses a folding frame and folding bicycle, auxiliary wheel can rotate with pipe axle synchronously, and auxiliary wheel and two wheels all touch the ground when folding, and the standing state and walking state of folding frame are supported together, when auxiliary wheel touches the ground, can provide stable supporting force for folding bicycle, so that it can stand immediately after folding, and the use experience is better.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a folding frame and a folding bicycle. Background Technology

[0002] A folding bicycle is a type of bicycle. When unfolded, it can be ridden and pushed normally; when folded, it takes up little space, making it easy to store and transport. Current folding bicycles mainly consist of two hinged frame sections, front and rear. These two sections can be rotated relative to each other around the hinge to achieve either an unfolded or folded state.

[0003] When folded, the front and rear wheels of a conventional folding bicycle come together and touch the ground, along with the pedal frame, providing support at both ends. However, drawbacks include: the bicycle cannot be pushed directly after folding; the hinge point must be manually lifted, leaving the pedal frame suspended and only the wheels touching the ground, making it inconvenient to use; and the limited contact area of ​​the pedal frame with the ground after folding necessitates moving a wall or using the user's hands to maintain its upright position, resulting in a poor user experience. Utility Model Content

[0004] The purpose of this invention is to propose a folding frame and a folding bicycle, which solves the problem that existing folding bicycles cannot be pushed directly after being folded, making them more convenient to use.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A folding bicycle frame includes: a first frame body, including a tube shaft for mounting a seat and auxiliary wheels connected to the tube shaft, wherein the auxiliary wheels can rotate synchronously with the tube shaft when the tube shaft rotates about its own axis; a second frame body; and a rotatable connector connected between the first frame body and the second frame body, wherein when the folding bicycle frame is in an unfolded state, the auxiliary wheels are suspended in the air; when the folding bicycle frame is in a folded state, the auxiliary wheels touch the ground, and the auxiliary wheels, together with the wheels, can support the folding bicycle frame in both standing and walking states.

[0007] In one preferred embodiment, the first frame body includes two auxiliary wheels arranged in parallel, and the two auxiliary wheels can synchronously follow the rotation of the tube shaft.

[0008] In one preferred embodiment, a wheel mounting base is provided between the two auxiliary wheels, and the bottom end of the tube shaft is connected to the wheel mounting base. The tube shaft drives the auxiliary wheels to rotate through the wheel mounting base.

[0009] In one preferred embodiment, the wheel mounting base includes an annular body and two limiting sleeves symmetrically disposed on the outer wall of the annular body. The axle for fixing the auxiliary wheel passes through the sleeve through hole of the limiting sleeve, and the bottom end of the axle passes through the annular body.

[0010] In one preferred embodiment, the wall surface of the sleeve through hole is provided with threads, the outer circumference of the wheel axle is provided with threads, and the limiting sleeve is threadedly connected to the wheel axle; or, the wall surface of the sleeve through hole is smooth, the outer circumference of the wheel axle is smooth, and the limiting sleeve is welded or bonded to the wheel axle.

[0011] In one preferred embodiment, the annular body has a notch, and adjustment holes are provided on both sides of the notch, with adjustment bolts passing through the two adjustment holes.

[0012] In one preferred embodiment, the first frame body and / or the second frame body are provided with magnetic attachments, and when the folding frame is in a folded state, the first frame body and the second frame body are magnetically connected.

[0013] In one preferred embodiment, the second frame includes a single front fork for connecting a wheel, the single front fork being at least partially arc-shaped.

[0014] On the other hand, the present invention adopts the following technical solution:

[0015] A folding bicycle includes two wheels and a folding frame as described above. One wheel is mounted on a first frame and the other wheel is mounted on a second frame. When the folding frame is in the unfolded state, both wheels are in contact with the ground, and the auxiliary wheel is suspended in the air. When the folding frame is in the folded state, both the auxiliary wheel and both wheels are in contact with the ground.

[0016] In one preferred embodiment, when the folding frame is folded, the wheels mounted on the first frame are parallel to the wheels mounted on the second frame.

[0017] The folding frame disclosed in this utility model has an auxiliary wheel that can rotate synchronously with the tube shaft. When folded, the auxiliary wheel and both wheels are in contact with the ground, jointly supporting the folding frame in both standing and walking states. When the auxiliary wheel is in contact with the ground, it can provide stable support for the folding bicycle, allowing it to stand up on its own after folding without the need for hand support or wall support, resulting in a better user experience.

[0018] The folding bicycle disclosed in this utility model includes the aforementioned folding frame. After folding, the user can apply a pushing force through the seat and tube axis to the auxiliary wheel, thereby moving the folding bicycle forward and backward. When it is necessary to adjust the direction, the user applies a force to the seat to rotate around the axis of the support column, and the auxiliary wheel and tube axis can rotate synchronously with the seat, thereby changing the orientation of the auxiliary wheel, making it more convenient to use. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the folding frame provided in a specific embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the combined structure of the tube shaft, auxiliary wheel, and wheel mounting base provided in a specific embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the combined structure of the auxiliary wheel and the wheel mounting base provided in a specific embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the wheel mounting base provided in a specific embodiment of this utility model.

[0023] In the picture:

[0024] 1. First frame body; 2. Second frame body; 3. Rotary connector; 11. Tube axle; 12. Auxiliary wheel; 13. Wheel mounting base; 21. Single front fork; 121. Wheel axle; 131. Ring-shaped main body; 132. Limiting sleeve; 133. Sleeve through hole; 134. Notch; 135. Adjustment hole; 136. Adjustment bolt. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model 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 full understanding of this utility model. However, this utility model can be implemented 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 this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] This embodiment discloses a folding frame and a folding bicycle including the folding frame, the folding bicycle also including two wheels mounted on the folding frame. Figure 1 and Figure 2 As shown, the folding frame includes a first frame body 1, a second frame body 2, and a swivel connector 3, which connects the first frame body 1 and the second frame body 2. One wheel is mounted on the first frame body 1, and the other wheel is mounted on the second frame body 2.

[0032] The first frame 1 includes a tube shaft 11 for mounting the seat and auxiliary wheels 12 connected to the tube shaft 11. When the tube shaft 11 rotates around its own axis, the auxiliary wheels 12 can rotate synchronously with the tube shaft 11. When the folding frame is in the unfolded state, the two wheels are in contact with the ground, and the auxiliary wheels 12 are suspended in the air; when the folding frame is in the folded state, the auxiliary wheels 12 and the two wheels are in contact with the ground, jointly supporting the folding frame in the standing and walking states.

[0033] When unfolded, this folding bicycle can be ridden and pushed normally, functioning exactly like a regular bicycle. When folded, the user can use the seat as a handlebar, applying force to the auxiliary wheels 12 via the seat and axle 11 to move the bicycle forward and backward. When needing to adjust direction, the user applies a force to the seat to rotate around the axis of the support column 11; the auxiliary wheels 12 and axle 11 rotate synchronously with the seat, thus changing the orientation of the auxiliary wheels 12, making it more convenient to use.

[0034] The specific shape and size of the training wheels 12 are not limited, as long as they can provide stable support for the folding bicycle when in contact with the ground, allowing it to stand upright independently after folding, without needing to be held by hand or lean against a wall, resulting in a better user experience. In this embodiment, as... Figures 1 to 3 As shown, the first frame 1 includes two parallel auxiliary wheels 12. The two auxiliary wheels 12 can synchronously follow the rotation of the tube shaft 11, making it more stable when standing up and pushing after folding.

[0035] Based on the above structure, a wheel mounting base 13 is provided between the two auxiliary wheels 12. The bottom end of the tube shaft 11 is connected to the wheel mounting base 13, and the tube shaft 11 drives the auxiliary wheels 12 to rotate through the wheel mounting base 13. When folded, whether the user applies a pushing force or a rotational force to the tube shaft 11 through the seat, the two auxiliary wheels 12 can provide support force to the tube shaft 11 from opposite sides to prevent the tube shaft 11 from tilting.

[0036] The specific structure of the wheel mounting base 13 is not limited, as long as it allows the auxiliary wheel 12 to rotate synchronously with the tube shaft 11. In this embodiment, for example... Figure 2 and Figure 4 As shown, the wheel mounting base 13 includes an annular body 131 and two limiting sleeves 132, which are symmetrically arranged on the outer wall of the annular body 131. A through hole 133 is formed in each limiting sleeve 132. The wheel axle 121 passes through the through hole at the center of the mounting auxiliary wheel 12 and is then inserted into the through hole 133, thereby fixing the mounting auxiliary wheel 12 onto the wheel mounting base 13.

[0037] The bottom end of the tube shaft 11 passes through the annular body 131. To allow the tube shaft 11 to move and rotate synchronously with the wheel mounting base 13, the bottom end of the tube shaft 11 is fixedly connected to the annular body 131. The specific fixed connection structure is not limited. In this embodiment, a through hole is formed on the side wall of the bottom end of the tube shaft 11, and a corresponding through hole is formed on the side wall of the annular body 131. Bolts or other connecting parts are sequentially inserted into the through holes of the tube shaft 11 and the annular body 131, preventing the tube shaft 11 and the annular body 131 from moving or rotating relative to each other axially.

[0038] To prevent radial relative movement between the tube shaft 11 and the annular body 131, in this embodiment, a notch 134 is provided on the annular body 131, and adjusting holes 135 are provided on both sides of the notch 134. Adjusting bolts 136 are inserted into the two adjusting holes 135. Tightening the adjusting bolts 136 can reduce the width of the notch 134, thereby reducing the diameter of the annular body 131 and tightly clamping the bottom end of the tube shaft 11. When the diameter of the tube shaft 11 is large, the adjusting bolts 136 can be loosened appropriately, allowing the bottom end of the tube shaft 11 to enter the annular body 131. This reduces the requirements for the machining accuracy of the annular body 131 and the tube shaft 11, resulting in lower machining costs and greater ease of use.

[0039] The specific connection structure between the axle 121 and the sleeve through hole 133 is not limited, as long as the auxiliary wheel 12 can be fixed on the wheel mounting base 13. In this embodiment, one structure is as follows: the wall surface of the sleeve through hole 133 is provided with threads, the outer circumference of the axle 121 is provided with threads, and the limiting sleeve 132 is threadedly connected to the axle 121, which is convenient for disassembly and assembly; another structure is as follows: the wall surface of the sleeve through hole 133 is smooth, the outer circumference of the axle 121 is smooth, and the limiting sleeve 132 is welded or bonded to the axle 121, which makes the overall structure more robust.

[0040] Based on the above structure, such as Figure 1 As shown, magnetic attachments are provided on the first frame body 1 and / or the second frame body 2. When the folding frame is in the folded state, the first frame body 1 and the second frame body 2 are magnetically connected, which can prevent the first frame body 1 and the second frame body 2 from accidentally separating and ensure the stability of the folded state. The specific shape and structure of the magnetic attachments are not limited, as long as they can form a sufficiently strong magnetic connection.

[0041] The second frame 2 includes a single front fork 21 for connecting the wheel, and the single front fork 21 is at least partially curved. After assembly, a laterally arranged axle is fixedly connected to the single front fork 21, the wheel is fitted onto the axle, and a sealing element is connected to the free end of the axle to ensure that the wheel does not separate from the axle, ensuring that the folding bicycle can be ridden normally. When folded, the structure with a front fork on only one side narrows the width of the second frame 2, saving more space after folding.

[0042] In some existing folding bicycles, when folded, the two wheels extend in a V-shape. While this doesn't prevent the bicycle from standing upright, the wheels' direction of extension being inconsistent with the direction of travel obstructs movement, resulting in high pushing resistance and a poor user experience. To address this issue, in this embodiment, when the folding frame is folded, the wheels mounted on the first frame 1 are parallel to the wheels mounted on the second frame 2, and the orientation of both wheels is consistent with the direction of travel.

[0043] The specific method for making the two wheels parallel to each other when folded is not limited. It can be that an angle adjustment component is installed on the first frame body 1 and / or the second frame body 2, or an angle adjustment component is installed on at least one wheel. Other existing structures and methods that can make the two wheels parallel are also acceptable.

[0044] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A folding bicycle frame, characterized in that, include: The first frame body (1) includes a tube shaft (11) for mounting a seat and an auxiliary wheel (12) connected to the tube shaft (11). When the tube shaft (11) rotates around its own axis, the auxiliary wheel (12) can rotate synchronously with the tube shaft (11). Second vehicle frame (2); and, The rotating connector (3) is connected between the first frame body (1) and the second frame body (2). When the folding frame is in the unfolded state, the auxiliary wheel (12) is suspended in the air; when the folding frame is in the folded state, the auxiliary wheel (12) touches the ground. The auxiliary wheel (12) can support the folding frame in both the standing and walking states together with the wheel.

2. The folding frame according to claim 1, characterized in that, The first frame body (1) includes two auxiliary wheels (12) arranged in parallel, and the two auxiliary wheels (12) can synchronously follow the rotation of the tube shaft (11).

3. The folding frame of claim 2, wherein, A wheel mounting base (13) is provided between the two auxiliary wheels (12), and the bottom end of the tube shaft (11) is connected to the wheel mounting base (13). The tube shaft (11) drives the auxiliary wheels (12) to turn through the wheel mounting base (13).

4. The folding frame according to claim 3, characterized in that, The wheel mounting base (13) includes an annular body (131) and two limiting sleeves (132) symmetrically arranged on the outer wall of the annular body (131). The wheel axle (121) for fixing the auxiliary wheel (12) passes through the sleeve through hole (133) of the limiting sleeve (132), and the bottom end of the tube shaft (11) passes through the annular body (131).

5. The folding frame of claim 4, wherein, The sleeve through hole (133) has threads on its wall surface, the axle (121) has threads on its outer circumference, and the limiting sleeve (132) is threadedly connected to the axle (121); or, The wall surface of the sleeve through hole (133) is smooth, the outer periphery of the wheel axle (121) is smooth, and the limiting sleeve (132) is welded or bonded to the wheel axle (121).

6. The folding frame according to claim 4, characterized in that, The annular body (131) has a notch (134) and adjustment holes (135) are provided on both sides of the notch (134). The adjustment bolt (136) passes through the two adjustment holes (135).

7. The folding frame of any one of claims 1 to 6, wherein, The first frame body (1) and / or the second frame body (2) are provided with magnetic components. When the folding frame is in a folded state, the first frame body (1) and the second frame body (2) are magnetically connected.

8. The folding frame of any one of claims 1 to 6, wherein, The second frame (2) includes a single front fork (21) for connecting the wheel, the single front fork (21) being at least partially arc-shaped.

9. A folding bicycle, comprising two wheels, characterized in that, The folding bicycle further includes a folding frame as described in any one of claims 1 to 8, one of the wheels is mounted on a first frame body (1), and the other wheel is mounted on a second frame body (2); when the folding frame is in an unfolded state, the two wheels are in contact with the ground, and the auxiliary wheel (12) is suspended in the air; when the folding frame is in a folded state, the auxiliary wheel (12) and the two wheels are in contact with the ground.

10. The folding bicycle of claim 9, wherein, When the folding frame is in the folded state, the wheels mounted on the first frame body (1) are parallel to the wheels mounted on the second frame body (2).

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