Suspension structure and bicycle

Abstract

This invention discloses a suspension structure, including: a suspension frame, a left wheel arm, a right wheel arm, a left wheel, and a right wheel; the suspension frame has a left connection port and a right connection port; one end of the left wheel arm is connected to the left wheel, and the other end is connected to the left connection port, and the left wheel arm can rotate about the axis of the left connection port as its central axis; one end of the right wheel arm is connected to the right wheel, and the other end is connected to the right connection port, and the right wheel arm can rotate about the axis of the right connection port as its central axis; both the left and right wheels have a used position and a folded position; when both the left and right wheels are in the used position, the left and right wheels are in an outward "V" shape; when both the left and right wheels are in the folded position, the left and right wheels are parallel. Before folding, the two wheels form an outward "V" shape, lowering the center of gravity and making the vehicle more stable; after folding, the two wheels are parallel, resulting in a more compact overall structure with less space occupied, making it particularly suitable for folding bicycles.

Description

Technical Field

[0001] This invention relates to the field of suspension structure technology, and more particularly to a suspension structure and a bicycle. Background Technology

[0002] As the name suggests, a suspension structure is used in vehicles such as bicycles to assist in balance. Currently, most personal transportation devices on the market, such as bicycles, folding bicycles, scooters, or balance bikes, lack a suspension structure. The main reason is that current suspension structures are primarily designed as training wheels, commonly found on children's bicycles. This type of suspension structure takes up a lot of space, is difficult to store, and results in a poor user experience. For general personal transportation, it is a dispensable structure. Therefore, a new suspension structure is needed. Summary of the Invention

[0003] In view of this, the present invention provides a suspension structure and a bicycle to solve the problems of large space occupation, difficulty in storage, and poor user experience in the prior art.

[0004] To achieve one or more of the above objectives or other objectives, the present invention provides a suspension structure comprising: a suspension frame, a left wheel arm, a right wheel arm, a left wheel, and a right wheel;

[0005] The suspension frame has a left connection port and a right connection port; one end of the left wheel arm is connected to the left wheel, and the other end is connected to the left connection port, and the left wheel arm can rotate about the axis of the left connection port as the central axis; one end of the right wheel arm is connected to the right wheel, and the other end is connected to the right connection port, and the right wheel arm can rotate about the axis of the right connection port as the central axis.

[0006] Both the left and right wheels have a used position and a folded position. When both the left and right wheels are in the used position, they are arranged in an outward "V" shape. When the left and right wheels are folded from the used position to the folded position, the left wheel arm rotates around its central axis, and the right wheel arm rotates around its central axis. After rotation, the left and right wheels are parallel to each other.

[0007] Furthermore, the left wheel arm is provided with a first connector at one end connected to the left connection port, and the first connector is connected to the left connection port through a first positioning member. The first positioning member has a first locking position and a second locking position at the left connection port. The right wheel arm is provided with a second connector at one end connected to the right connection port, and the second connector is connected to the right connection port through a second positioning member. The second positioning member has a third locking position and a fourth locking position at the right connection port.

[0008] When both the left and right wheels are in the working position, the first connector and the left connection port are engaged in the first engagement position, and the second connector and the right connection port are engaged in the third engagement position; when both the left and right wheels are in the folded position, the first connector and the left connection port are engaged in the second engagement position, and the second connector and the right connection port are engaged in the fourth engagement position.

[0009] Further, the first positioning component includes: a first limiting cover, a first spring, a first screw, and a first fixing shaft, wherein the inner side of the cover plate of the first limiting cover is provided with a first limiting protrusion and a hollow first connecting shaft; the second positioning component includes: a second limiting cover, a second spring, a second screw, and a second fixing shaft, wherein the inner side of the cover plate of the second limiting cover is provided with a second limiting protrusion and a hollow second connecting shaft; wherein,

[0010] The first fixed shaft is connected to the left connecting port, the first connector is sleeved on the first fixed shaft, the first snap-fit ​​position is the first notch on the outer end of the first connector, the second snap-fit ​​position is the second notch on the outer end of the first connector, the first connecting shaft is inserted into the first fixed shaft and snap-fitted with it circumferentially, the first screw passes through the bottom of the first connecting shaft and connects to the first fixed shaft, one end of the first spring abuts against the bottom of the first connecting shaft, and the other end abuts against the nut of the first screw;

[0011] The second fixed shaft is connected to the right connecting port, the second connector is sleeved on the second fixed shaft, the third snap-fit ​​position is the third notch on the outer end of the first connector, the fourth snap-fit ​​position is the fourth notch on the outer end of the second connector, the second connecting shaft is inserted into the second fixed shaft and snap-fitted with it circumferentially, the second screw passes through the bottom of the second connecting shaft and connects to the second fixed shaft, one end of the second spring abuts against the bottom of the second connecting shaft, and the other end abuts against the nut of the second screw;

[0012] When both the left and right wheels are in the use position, the first limiting protrusion engages with the first notch, and the second limiting protrusion engages with the third notch; when both the left and right wheels are in the folded position, the first limiting protrusion engages with the second notch, and the second limiting protrusion engages with the fourth notch.

[0013] Furthermore, the suspension structure also includes: a left torsion spring and a right torsion spring;

[0014] The left torsion spring is sleeved on the left connector, with one end connected to the outer wall of the left connector and the other end connected to the first connector; the right torsion spring is sleeved on the right connector, with one end connected to the outer wall of the right connector and the other end connected to the second connector.

[0015] Furthermore, both the first connecting shaft and the second connecting shaft have circumferential limiting structures on their outer periphery, and both the first fixed shaft and the second fixed shaft have limiting through holes that match the circumferential limiting structures.

[0016] Furthermore, the first positioning element further includes at least one first bearing; the second positioning element further includes at least one second bearing;

[0017] The first bearing is snapped onto the first fixed shaft, and the first connector is movably connected to the first bearing. The second bearing is snapped onto the second fixed shaft, and the second connector is movably connected to the second bearing.

[0018] Furthermore, the size of the first notch is larger than the size of the first limiting protrusion, and the size of the third notch is larger than the size of the second limiting protrusion.

[0019] Furthermore, the left wheel arm is provided with a first wheel fork at one end connected to the left wheel, and the left wheel is connected to the first wheel fork; the right wheel arm is provided with a second wheel fork at one end connected to the right wheel, and the right wheel is connected to the second wheel fork.

[0020] Furthermore, the suspension frame also has a connecting rod for movably connecting to the vehicle body. The suspension frame is generally in the shape of an inverted "T", and both the left and right connecting ports are inclined upwards. The suspension structure also includes at least one third bearing, which is snapped onto the connecting rod for movably connecting to the vehicle frame.

[0021] To achieve one or more of the above objectives or other objectives, the present invention also provides a bicycle comprising the suspension structure described in any of the preceding claims.

[0022] Implementing the embodiments of the present invention will have the following beneficial effects:

[0023] With the aforementioned suspension structure, which includes two foldable wheels (left and right), before folding, the two wheels form an outward "V" shape, lowering the center of gravity and making the vehicle more stable and less prone to tipping over. After folding, the two wheels are parallel, resulting in a more compact overall structure that occupies less space, making it particularly suitable for folding bicycles. Additionally, this suspension structure can be used as a support wheel, i.e., for the rear wheel of a utility bicycle or similar device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] in:

[0026] Figure 1 This is an exploded view of the suspension structure in one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the left wheel arm in one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the second limiting cover in one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the suspension structure in its usage state when applied to a folding bicycle, according to one embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram of the suspension structure in the folded state when the suspension structure is applied to a folding bicycle in one embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the suspension structure in one embodiment of the present invention;

[0032] Figure 7 for Figure 6 Sectional view of section AA.

[0033] Figure label:

[0034] 1. Suspension bracket; 11. Left connection port; 12. Right connection port; 13. Connecting rod; 131. Third bearing;

[0035] 2. Left wheel arm; 21. First joint; 211. First notch; 212. Second notch; 22. First wheel fork; 23. First wheel axle; 24. First wheel axle screw;

[0036] 3. Right wheel arm; 31. Second connector; 311. Third notch; 312. Fourth notch; 32. Second wheel fork; 33. Second wheel axle; 34. Second wheel axle screw;

[0037] 4. Revolver;

[0038] 5. Right wheel;

[0039] 6. First positioning component; 61. First limiting cover; 611. First limiting protrusion; 612. First connecting shaft; 62. First spring; 63. First screw; 64. First fixing shaft; 65. First bearing;

[0040] 7. Second positioning component; 71. Second limiting cover; 711. Second limiting protrusion; 712. Second connecting shaft; 72. Second spring; 73. Second screw; 74. Second fixing shaft; 75. Second bearing;

[0041] 8. Left torsion spring;

[0042] 9. Right torsion spring. Detailed Implementation

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0046] Reference Figures 1 to 7 This invention provides a suspension structure, comprising: a suspension frame 1, a left wheel arm 2, a right wheel arm 3, a left wheel 4, and a right wheel 5;

[0047] The suspension frame 1 has a left connection port 11 and a right connection port 12; one end of the left wheel arm 2 is connected to the left wheel 4 and the other end is connected to the left connection port 11, and the left wheel arm 2 can rotate about the axis of the left connection port 11 as the central axis; one end of the right wheel arm 3 is connected to the right wheel 5 and the other end is connected to the right connection port 12, and the right wheel arm 3 can rotate about the axis of the right connection port 12 as the central axis.

[0048] Both the left wheel 4 and the right wheel 5 have a working position and a folded position. When both the left wheel 4 and the right wheel 5 are in the working position, the left wheel 4 and the right wheel 5 are in an outward "V" shape. When the left wheel 4 and the right wheel 5 are folded from the working position to the folded position, the left wheel arm 2 rotates around its central axis and the right wheel arm 3 rotates around its central axis. After rotation, the left wheel 4 and the right wheel 5 are parallel to each other.

[0049] In this embodiment, the aforementioned suspension structure is a structure used for the rear wheel of a personal transportation device such as a bicycle, balance bike, or scooter, to... Figure 5 For example, this figure shows an example of a suspension structure applied to a folding bicycle. The aforementioned suspension frame 1 can be a single molded part or formed by welding and splicing several components. It can be a V-shaped part or a T-shaped part. It is worth mentioning that when the suspension frame 1 is connected to the lower rear of the bicycle, the left connecting port 11 and the right connecting port 12 are slightly tilted upwards, while the corresponding end of the left wheel arm 2 connected to the left wheel 4 is slightly tilted downwards to fit and connect with the left connecting port 11. The specific structure of the right wheel arm 3 is similar to that of the left wheel arm 2. Thus, after connection, when both the left wheel 4 and the right wheel 5 are in the use position, the left wheel 4 and the right wheel 5 together form an outward "V" shape. Figure 4 For example, at this time, both the left wheel 4 and the right wheel 5 are below the suspension bracket 1. When both the left wheel 4 and the right wheel 5 are in the folded position, the left wheel 4, the right wheel 5, and the connecting rod 13 are parallel to each other. Figure 5 For example, at this time, both the left wheel 4 and the right wheel 5 are in front of the suspension frame 1. The above-mentioned usage position and folding position refer to two different fixed positions of the left wheel 4 and the right wheel 5. Since the two wheels are parallel after folding, the overall structure is tighter than before folding, reducing the space occupied, making it suitable for use on folding bicycles and also usable as support wheels.

[0050] In one embodiment, the left wheel arm 2 is provided with a first connector 21 at one end connected to the left connection port 11. The first connector 21 is connected to the left connection port 11 through a first positioning member 6. The first positioning member 6 has a first locking position and a second locking position at its outer end. The right wheel arm 3 is provided with a second connector 31 at one end connected to the right connection port 12. The second connector 31 is connected to the right connection port 12 through a second positioning member 7. The second positioning member 7 has a third locking position and a fourth locking position at its outer end.

[0051] When both the left wheel 4 and the right wheel 5 are in the working position, the first connector 21 and the left connecting port 11 are engaged in the first engagement position, and the second connector 31 and the right connecting port 12 are engaged in the third engagement position; when both the left wheel 4 and the right wheel 5 are in the folded position, the first connector 21 and the left connecting port 11 are engaged in the second engagement position, and the second connector 31 and the right connecting port 12 are engaged in the fourth engagement position.

[0052] In this embodiment, both the first connector 21 and the second connector 31 can be tubular connectors or ring connectors. The first positioning member 6 and the second positioning member 7 mainly serve as adapters. Taking the left side as an example, the right side is similar. On the left wheel 4 side, the left connecting port 11 is first connected through the first positioning member 6 to extend the left connecting port 11. Then, the first connector 21 is connected to the first positioning member 6 to connect the first connector 21 and the left connecting port 11. The two locking positions provided on the first positioning member 6, namely the first locking position and the second locking position, correspond to the used state position and the folded state position, respectively.

[0053] In one embodiment, the first positioning member 6 includes: a first limiting cover 61, a first spring 62, a first screw 63, and a first fixing shaft 64. The inner side of the cover plate of the first limiting cover 61 is provided with a first limiting protrusion 611 and a hollow first connecting shaft 612. The second positioning member 7 includes: a second limiting cover 71, a second spring 72, a second screw 73, and a second fixing shaft 74. The inner side of the cover plate of the second limiting cover 71 is provided with a second limiting protrusion 711 and a hollow second connecting shaft 712.

[0054] The first fixed shaft 64 is connected to the left connecting port 11. The first connector 21 is sleeved on the first fixed shaft 64. The first snap-fit ​​position is the first notch 211 on the outer end of the first connector 21, and the second snap-fit ​​position is the second notch 212 on the outer end of the first connector 21. The first connecting shaft 612 is inserted into the first fixed shaft 64 and snap-fitted with it circumferentially. The first screw 63 passes through the bottom of the first connecting shaft 612 and connects to the first fixed shaft 64. One end of the first spring 62 abuts against the bottom of the first connecting shaft 612, and the other end abuts against the nut of the first screw 63.

[0055] The second fixed shaft 74 is connected to the right connecting port 12. The second connector 31 is sleeved on the second fixed shaft 74. The third snap-fit ​​position is the third notch 311 on the outer end of the first connector 21. The fourth snap-fit ​​position is the fourth notch 312 on the outer end of the second connector 31. The second connecting shaft 712 is inserted into the second fixed shaft 74 and snap-fitted with it circumferentially. The second screw 73 passes through the bottom of the second connecting shaft 712 and connects to the second fixed shaft 74. One end of the second spring 72 abuts against the bottom of the second connecting shaft 712, and the other end abuts against the nut of the second screw 73.

[0056] When both the left wheel 4 and the right wheel 5 are in the working position, the first limiting protrusion 611 engages with the first notch 211, and the second limiting protrusion 711 engages with the third notch 311; when both the left wheel 4 and the right wheel 5 are in the folded position, the first limiting protrusion 611 engages with the second notch 212, and the second limiting protrusion 711 engages with the fourth notch 312.

[0057] In this embodiment, the left wheel 4 side is described in detail, while the right wheel 5 side is symmetrical to the left wheel 4 side. Specifically, the cover plate of the first limiting cover 61 can be plate-shaped, cover-shaped, or sheet-shaped. During installation, the side facing the first opening is the inner side. The first limiting protrusion 611 is a block-shaped structure set on this side. Of course, it can also be a smaller rib. If the material used has high strength, it can also be set as a strip-shaped structure, as long as it can engage with the first notch 211 and the second notch 212 to play a circumferential limiting role. The first notch 211 and the second notch 212 can be a single notch or a pair of notches. Similarly, the first limiting protrusion 611 can be a single notch or a pair of notches. Figure 2 and Figure 3 This diagram illustrates one specific structural configuration of a single notch and a single first limiting protrusion 611. The aforementioned first connecting shaft 612 is a connecting structure connected to the inner side of the cover plate and perpendicular to the cover plate. Its interior is hollow, allowing a first screw 63 to be installed inside the first connecting shaft 612. The first screw 63 passes through the bottom of the first connecting shaft 612 and is fixed to a first fixing shaft 64. A first spring 62 is then fitted onto the first screw 63. One end of the first spring 62 abuts against the bottom of the first connecting shaft 612, and the other end abuts against the nut of the first screw 63. Thus, since the first screw 63 is fixed, the first spring 62 provides resistance to the first connecting shaft 612. 2. There is an inward elastic force, which causes the cover plate of the first limiting cover 61 to be pressed inward. When the left wheel 4 is in the use position, the first limiting protrusion 611 and the first notch 211 can be stably engaged. When folding is required, the first limiting cover 61 can be pulled outward. At this time, the first limiting protrusion 611 and the first notch 211 disengage, and the first connector 21 can rotate, that is, the left wheel 4 can rotate. When rotated to the folded position, the external force is released, and the first spring 62 has an inward elastic force on the first connecting shaft 612, which will engage the first limiting protrusion 611 with the second notch 212. It is worth mentioning that in the above embodiment, the first engaging position, the second engaging position, the third engaging position and the fourth engaging position are different positioning positions. The first limiting protrusion 611 and the first notch 211 cooperate to form a positioning position, and so on.

[0058] In one embodiment, the suspension structure further includes: a left torsion spring 8 and a right torsion spring 9;

[0059] The left torsion spring 8 is sleeved on the left connecting port 11, with one end connected to the outer wall of the left connecting port 11 and the other end connected to the first connector 21; the right torsion spring 9 is sleeved on the right connecting port 12, with one end connected to the outer wall of the right connecting port 12 and the other end connected to the second connector 31.

[0060] In this embodiment, both the left torsion spring 8 and the right torsion spring 9 serve to assist in the return to the original position. Taking the left torsion spring 8 as an example, in conjunction with the previous embodiment, the first spring 62 exerts an inward elastic force on the first connecting shaft 612. This elastic force causes the cover plate of the first limiting cover 61 to be pressed inward. When the left wheel 4 is in the use position, the first limiting protrusion 611 and the first notch 211 can be stably engaged. At this time, the left torsion spring 8 is in a compressed state. When folding is required, the first limiting cover 61 can be pulled outward. At this time, the first limiting protrusion 611 and the first notch 211 disengage, and the torque of the torsion spring drives the left wheel arm 2 to rotate, that is, the left wheel 4 is driven to rotate. When it rotates to the folded position, since the second notch 212 is provided at this position, the inward elastic force of the first spring 62 on the first connecting shaft 612 will again engage the first limiting protrusion 611 with the second notch 212. In this way, the left wheel 4 is fixed in the folded position. The function of the right torsion spring 9 is similar to that described above, and will not be repeated.

[0061] In one embodiment, the outer periphery of both the first connecting shaft 612 and the second connecting shaft 712 has a circumferential limiting structure, and the first fixed shaft 64 and the second fixed shaft 74 both have limiting through holes that match the circumferential limiting structure.

[0062] In this embodiment, the first connecting shaft 612 can be any other regular polygonal prism, thus forming a circumferential limiting structure on its outer periphery. The limiting through hole can be a through hole that matches the regular polygonal prism structure. For example, if the first connecting shaft 612 is a regular hexagonal prism, then the limiting through hole can be a through hole with an inner hollow regular hexagonal prism.

[0063] In one embodiment, the first positioning member 6 further includes at least one first bearing 65; the second positioning member 7 further includes at least one second bearing 75.

[0064] The first bearing 65 is snapped onto the first fixed shaft 64, and the first connector 21 is movably connected to the first bearing 65. The second bearing 75 is snapped onto the second fixed shaft 74, and the second connector 31 is movably connected to the second bearing 75.

[0065] In this embodiment, since the left wheel arm 2 needs to rotate around the axis of the left connecting port 11 as its central axis, and the right wheel arm 3 needs to rotate around the axis of the right connecting port 12 as its central axis, bearings are provided to make the rotation process smoother. The first bearing 65 can be one, two, or more. Figure 1 and Figure 7 An example is given where there are two first bearings 65. The case of the right wheel arm 3 is similar to the above case and will not be described again.

[0066] In one embodiment, the size of the first notch 211 is larger than that of the first limiting protrusion 611, and the size of the third notch 311 is larger than that of the second limiting protrusion 711.

[0067] In this embodiment, in conjunction with the aforementioned embodiments, and in conjunction with the left torsion spring 8, the first limiting block normally abuts against one side of the first notch 211. Since the size of the first notch 211 is larger than the first limiting protrusion 611, when the vehicle is in motion, if it encounters a bump and the force generated by the bump is greater than the torsion of the spring, the first limiting protrusion 611 can move within the first notch 211, and the left wheel 4 and the left wheel arm 2 can be displaced, that is, the left wheel 4 produces a shock absorption effect. The right wheel 5 is similar to the left wheel 4 and will not be described in detail.

[0068] In one embodiment, the left wheel arm 2 is provided with a first wheel fork 22 at one end connected to the left wheel 4, and the left wheel 4 is connected to the first wheel fork 22 by a first wheel axle 23 and a first wheel axle screw 24; the right wheel arm 3 is provided with a second wheel fork 32 at one end connected to the right wheel 5, and the right wheel 5 is connected to the second wheel fork 32 by a second wheel axle 33 and a second wheel axle screw 34.

[0069] In one embodiment, the suspension frame 1 also has a connecting rod 13 for movably connecting to the vehicle body. The suspension frame 1 is generally inverted "T" shape, with the left connecting port 11 and the right connecting port 12 both inclined upwards. The suspension structure also includes at least one third bearing 131, which is snapped onto the connecting rod 13 for movably connecting to the vehicle frame.

[0070] In this embodiment, both the left connecting port 11 and the right connecting port 12 are tilted upwards. This allows the left wheel arm 2 to be connected to the left connecting port 11 and the right wheel arm 3 to be connected to the right connecting port 12. In the operating position, the angle between the left wheel 4 and the right wheel 5 is larger, which is more conducive to balance. In the folded position, the overall suspension structure is more compact. After the connecting rod 13 is connected to the vehicle frame via the third bearing 131, the entire suspension structure can be used as the rear wheel of the vehicle, at which point the connecting rod 13 has a guiding steering function.

[0071] In one embodiment, the present invention also provides a bicycle comprising the suspension structure described above.

[0072] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A suspension structure, characterized in that, include: Suspension frame, left wheel arm, right wheel arm, left wheel, and right wheel; The suspension bracket has a left connection port and a right connection port; The left wheel arm is connected to the left wheel at one end and to the left connector at the other end. The left wheel arm can rotate about the axis of the left connector as the central axis. The right wheel arm is connected to the right wheel at one end and to the right connector at the other end. The right wheel arm can rotate about the axis of the right connector as the central axis. The left wheel arm is provided with a first connector at one end connected to the left connection port. The first connector is connected to the left connection port through a first positioning member. The first positioning member has a first locking position and a second locking position at its outer end. The right wheel arm is provided with a second connector at one end connected to the right connection port. The second connector is connected to the right connection port through a second positioning member. The second positioning member has a third locking position and a fourth locking position at its outer end. When both the left and right wheels are in the working position, the first connector and the left connection port are engaged in the first engagement position, and the second connector and the right connection port are engaged in the third engagement position; when both the left and right wheels are in the folded position, the first connector and the left connection port are engaged in the second engagement position, and the second connector and the right connection port are engaged in the fourth engagement position. The first positioning component includes a first limiting cover; the second positioning component includes a second limiting cover; Both the left and right wheels have a used position and a folded position. When both the left and right wheels are in the used position, they are arranged in an outward "V" shape. When the left and right wheels are folded from the used position to the folded position, the first limiting cover is pulled outward, and the left wheel arm rotates around its central axis. The second limiting cover is also pulled outward, and the right wheel arm rotates around its central axis. After rotation, the left and right wheels are parallel to each other.

2. The suspension structure according to claim 1, characterized in that, The first positioning component further includes: a first spring, a first screw, and a first fixing shaft; the inner side of the cover plate of the first limiting cover is provided with a first limiting protrusion and a hollow first connecting shaft; the second positioning component further includes: a second spring, a second screw, and a second fixing shaft; the inner side of the cover plate of the second limiting cover is provided with a second limiting protrusion and a hollow second connecting shaft; wherein... The first fixed shaft is connected to the left connecting port, the first connector is sleeved on the first fixed shaft, the first snap-fit ​​position is the first notch on the outer end of the first connector, the second snap-fit ​​position is the second notch on the outer end of the first connector, the first connecting shaft is inserted into the first fixed shaft and snap-fitted with it circumferentially, the first screw passes through the bottom of the first connecting shaft and connects to the first fixed shaft, one end of the first spring abuts against the bottom of the first connecting shaft, and the other end abuts against the nut of the first screw; The second fixed shaft is connected to the right connecting port, the second connector is sleeved on the second fixed shaft, the third snap-fit ​​position is the third notch on the outer end of the first connector, the fourth snap-fit ​​position is the fourth notch on the outer end of the second connector, the second connecting shaft is inserted into the second fixed shaft and snap-fitted with it circumferentially, the second screw passes through the bottom of the second connecting shaft and connects to the second fixed shaft, one end of the second spring abuts against the bottom of the second connecting shaft, and the other end abuts against the nut of the second screw; When both the left and right wheels are in the use position, the first limiting protrusion engages with the first notch, and the second limiting protrusion engages with the third notch; when both the left and right wheels are in the folded position, the first limiting protrusion engages with the second notch, and the second limiting protrusion engages with the fourth notch.

3. The suspension structure according to claim 2, characterized in that, The suspension structure also includes: a left torsion spring and a right torsion spring; The left torsion spring is sleeved on the left connector, with one end connected to the outer wall of the left connector and the other end connected to the first connector; the right torsion spring is sleeved on the right connector, with one end connected to the outer wall of the right connector and the other end connected to the second connector.

4. The suspension structure according to claim 2, characterized in that, Both the first connecting shaft and the second connecting shaft have circumferential limiting structures on their outer periphery, and both the first fixed shaft and the second fixed shaft have limiting through holes that match the circumferential limiting structures.

5. The suspension structure according to claim 2, characterized in that, The first positioning element further includes at least one first bearing; the second positioning element further includes at least one second bearing; The first bearing is snapped onto the first fixed shaft, and the first connector is movably connected to the first bearing. The second bearing is snapped onto the second fixed shaft, and the second connector is movably connected to the second bearing.

6. The suspension structure according to claim 2, characterized in that, The size of the first notch is larger than the size of the first limiting protrusion, and the size of the third notch is larger than the size of the second limiting protrusion.

7. The suspension structure according to claim 1, characterized in that, The left wheel arm is provided with a first wheel fork at one end connected to the left wheel, and the left wheel is connected to the first wheel fork; the right wheel arm is provided with a second wheel fork at one end connected to the right wheel, and the right wheel is connected to the second wheel fork.

8. The suspension structure according to claim 1, characterized in that, The suspension frame also has a connecting rod for movably connecting to the vehicle body. The suspension frame is generally in the shape of an inverted "T". Both the left and right connecting ports are inclined upwards. The suspension structure also includes at least one third bearing, which is snapped onto the connecting rod for movably connecting to the vehicle frame.

9. A bicycle, characterized in that, The bicycle includes the suspension structure as described in any one of claims 1-8.

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