Folding electric scooter

Abstract

The invention relates to the technical field of electric scooters, and discloses a folding electric scooter which comprises a scooter beam and a front fork, a fixing support is installed on the front portion of the scooter beam, the front fork is rotatably installed on the fixing support through a rotating support, a front wheel is fixedly installed at the bottom of the front fork, and an eccentric lug is coaxially installed on the front wheel. A fender is fixedly connected to the eccentric lug, a supporting face is machined on the side, back on to the front wheel, of the fender, a linkage pull rod is further arranged between the eccentric lug and the fixing support, one end of the linkage pull rod is rotationally connected with the eccentric lug, and the other end of the linkage pull rod is rotationally connected with the fixing support. According to the electric scooter, the revolution motion of the rotating support is converted into the rotation motion of the eccentric lug seat, so that the mudguard synchronously turns to the lower portion from the upper portion of the front wheel in the folding process, the supporting face of the mudguard stably makes contact with the ground, the supporting mode that a traditional electric scooter depends on a scooter beam and a rolling front wheel is replaced, and the problem that the scooter topples over after being folded is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of electric scooter technology, specifically a folding electric scooter. Background Technology

[0002] Folding electric scooters are personal short-distance transportation tools that combine electric drive with a portable folding design. Powered by a built-in motor and rechargeable battery, they use a special hinge structure to achieve quick folding and storage. They are compact, easy to carry, environmentally friendly and energy-saving, effectively solving the "last mile" problem in urban commuting. They are suitable for office workers, students and other people to travel short distances on flat roads, making them a green travel option that combines practicality and flexibility in modern urban life.

[0003] Folding electric scooters, as convenient short-distance transportation tools, are often stored indoors in storage rooms or homes after being folded up. However, in actual use, the front fenders of existing folding electric scooters easily accumulate a large amount of dust and mud. For example, Chinese patent CN106005191B discloses a folding electric scooter, which includes front and rear wheels driven by hub motors, a rotating folding mechanism connecting the front fork and the frame, a segmented adjustable outer stem, and an insert-type connection structure between the frame and the footrest cover through positioning grooves and reinforcing ribs. When such folding electric scooters are stored indoors, these accumulated substances are easy to fall off, and large pieces of mud and sand may also fall due to accidental tipping of the vehicle, seriously affecting the cleanliness of the indoor environment. At the same time, such folding electric scooters rely on the frame and front wheels for support after folding. Due to the rolling characteristics of the front wheels, the stability of the vehicle is poor when placed, making it very easy to tip over, which not only poses a safety hazard but also further exacerbates the problem of mud and sand scattering. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a folding electric scooter that offers advantages such as stable support after folding without tipping over, and the ability to simultaneously clean dust and mud from the mudguards to prevent them from scattering and polluting the indoor environment. This solves the problems of existing folding electric scooters, which rely on the frame and rolling front wheel for support after folding and are prone to tipping over, and the dust and mud attached to the mudguards easily falling off.

[0005] (II) Technical Solution To achieve the aforementioned goals of stable support and preventing tipping after folding, and to simultaneously clean the mudguards of dust and sand to avoid scattering and polluting the indoor environment, this invention provides the following technical solution: A folding electric scooter, comprising a frame and a front fork, wherein a fixed bracket is fixedly installed at the front of the frame, the front fork is rotatably mounted on the fixed bracket via a rotating bracket, a rear wheel is fixedly installed at the rear of the frame, a front wheel is fixedly installed at the bottom of the front fork, an eccentric lug is coaxially rotatably mounted on the front wheel, and an arc-shaped mudguard is fixedly connected to the eccentric lug. The mudguard has a support surface machined on the side facing away from the front wheel, and when riding, the mudguard is located above the front wheel; a linkage rod is also provided between the eccentric lug and the fixed bracket, one end of the linkage rod is rotatably connected to the eccentric lug, and the other end of the linkage rod is rotatably connected to the fixed bracket; when folded, the rotating bracket is pushed to rotate and move closer to the frame, thereby causing the linkage rod to pull the eccentric lug to rotate, causing the mudguard to rotate towards the underside of the front wheel until the support surface contacts the ground to form support.

[0006] Preferably, a folding pivot is fixedly installed on the fixed bracket, and the rotating bracket is rotatably connected to the fixed bracket via the folding pivot. One end of the rotating bracket is rotatably connected to the folding pivot, and a cylindrical connecting sleeve is fixedly installed at the other end of the rotating bracket. The front fork is rotatably connected to the rotating bracket via the connecting sleeve. A linkage shaft and a fixed shaft are respectively fixedly installed at both ends of the linkage rod. The fixed shaft is rotatably connected to the fixed bracket, and the linkage shaft is rotatably connected to the eccentric lug. When the rotating bracket rotates around the folding pivot, it synchronously drives the front fork and the front wheel to revolve around the folding pivot. At the same time, the linkage rod rotates around the fixed shaft, thereby driving the eccentric lug to rotate around the axis of the front wheel via the linkage shaft.

[0007] Preferably, the axes of the folding pivot, the fixed pivot, and the linkage are perpendicular to the direction of travel of the front wheel. The fixed pivot and the folding pivot are eccentrically arranged on the fixed bracket, with the fixed pivot located below the folding pivot. The installation position of the linkage on the eccentric lug is offset from the axis of the front wheel. After folding, the axes of the fixed pivot, the folding pivot, and the linkage are in the same straight line. The eccentric lug rotates to its maximum angle, and the supporting surface of the mudguard forms the maximum contact area with the ground.

[0008] Preferably, the linkage rod is a linear actuator.

[0009] Preferably, a wear-resistant and anti-slip layer is fixedly provided on the surface of the support surface.

[0010] Preferably, an axle is fixedly connected to the bottom of the fork, the front wheel is rotatably connected to the fork via the axle, and the eccentric lug is rotatably connected to the front wheel via the axle; the eccentric lug is provided on both axial sides of the axle, and a support plate is provided at both ends of the eccentric lug along its radial direction, and the support plate is fixedly connected to the mudguard.

[0011] Preferably, two sets of connecting rods are fixedly connected to both sides of the axle along the axial direction. The connecting rods are arranged along the radial direction of the front wheel, and the ends of the two sets of connecting rods away from the axle are connected to a U-shaped scraper. The scraper is in close contact with the inner wall of the mudguard, and when the mudguard rotates, the scraper scrapes off the dust adhering to the inner wall of the mudguard.

[0012] Preferably, the scraper is positioned at the lowest point of the scraper on the rear side of the front wheel.

[0013] Preferably, the distance between the two sets of connecting rods is less than the distance between the two sets of eccentric lugs, and the two sets of eccentric lugs and the two sets of connecting rods are symmetrically arranged with respect to the front wheel.

[0014] Preferably, a stem is fixedly connected to the top of the fork, and a handle is fixedly installed on the top of the stem.

[0015] Preferably, the fixed bracket is inclined to the vehicle beam; a folding locking mechanism is provided between the fixed bracket and the rotating bracket.

[0016] Preferably, a rear mudguard is fixedly installed on the rear wheel.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides a folding electric scooter with the following advantages: 1. This folding electric scooter, through the combined use of a linkage rod structure and an eccentric lug structure, transforms the revolution of the rotating bracket into the rotation of the eccentric lug. This allows the mudguard to rotate synchronously from above the front wheel to below during folding, ensuring stable contact between its support surface and the ground. This replaces the traditional electric scooter's reliance on the frame and rolling front wheel for support, effectively preventing the vehicle from tipping over after folding. Furthermore, it eliminates the need for an additional independent kickstand, simplifying the overall structure and improving the stability and practicality of the folded scooter, making indoor storage safer and more reliable.

[0018] 2. This folding electric scooter, through the combined use of a linkage rod structure and a scraper structure, achieves synchronous dust scraping as the mudguard rotates during the folding process. Without the need for additional manual cleaning, it can remove dust and mud adhering to the inner wall of the mudguard during riding, solving the problem of mudguard residue falling off and polluting the indoor environment in traditional electric scooters from the source, thereby effectively improving the cleanliness of the electric scooter when stored.

[0019] 3. This folding electric scooter, through the combined use of a linkage rod structure and a mudguard structure, when the linkage rod adopts a linear actuator, its active extension and retraction function not only provides auxiliary folding force after the folding locking mechanism is unlocked, reducing the manual labor required for folding operations and solving the problem of laborious folding of existing folding electric scooters, but also allows the angle of the mudguard to be changed by adjusting its extension and retraction state during driving, so that the lowest point height of the mudguard can be flexibly adjusted according to different driving occasions and road conditions, solving the limitation of the fixed angle of traditional mudguards, improving the adaptability of mudguarding effect, and expanding the applicable scenarios of this application. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the folding electric scooter in this invention; Figure 2 This is a three-dimensional structural schematic diagram of the folding electric scooter in this invention; Figure 3 This is a three-dimensional schematic diagram of the front wheel structure of the folding electric scooter in this invention; Figure 4 This is a schematic diagram of the front wheel structure of the folding electric scooter in this invention; Figure 5 This is a cross-sectional view of the front wheel structure of the folding electric scooter in this invention; Figure 6 This is a schematic diagram of the mudguard structure of the folding electric scooter in this invention; Figure 7 This is a schematic diagram of the scraper structure of the folding electric scooter in this invention; Figure 8 This is a schematic diagram of the mudguard structure of the folding electric scooter in this invention; Figure 9 This is a folding diagram of the folding electric scooter in this invention; Figure 10 This is a schematic diagram of the linkage rod structure in Embodiment 2 of the present invention.

[0021] In the diagram: 1. Chassis beam; 11. Fixed bracket; 2. Front fork; 21. Axle; 3. Rotating bracket; 31. Folding pivot; 32. Connecting sleeve; 4. Front wheel; 41. Mudguard; 42. Support surface; 43. Support plate; 5. Eccentric lug; 6. Linkage rod; 61. Linkage shaft; 62. Fixed shaft; 7. Scraper; 71. Connecting rod; 8. Rear wheel; 9. Stem tube; 91. Handlebar. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-9A folding electric scooter includes a frame 1 and a front fork 2. A fixed bracket 11 is fixedly installed on the front of the frame 1. The fixed bracket 11 adopts an L-shaped plate structure. One end of the fixed bracket 1 is rigidly connected to the front of the frame 1 by welding or bolting to ensure that the connection strength is sufficient to withstand the force during folding and riding. The front fork 2 is rotatably mounted on the fixed bracket 11 through a rotating bracket 3. The rotating bracket 3 has a symmetrical clamp-type structure on both sides. One end of the rotating bracket 3 is rotatably engaged with the fixed bracket 11 through a folding pivot 31. A deep groove ball bearing is installed between the folding pivot 31 and the fixed bracket 11 to reduce rotational resistance. The other end of the rotating bracket 3 is sleeved with the front fork 2 through a cylindrical connecting sleeve 32. The inner wall of the connecting sleeve 32 is provided with an anti-slip keyway that engages with the protrusion on the outer wall of the front fork 2 to ensure that the front fork 2 and the rotating bracket 3 move synchronously. The rear wheel 8 is fixedly installed at the rear of the beam 1, and the front wheel 4 is fixedly installed at the bottom of the front fork 2. An eccentric lug 5 is also coaxially rotatably installed on the front wheel 4. The bottom of the front fork 2 is provided with symmetrical fork arms. The wheel axle 21 passes through the fork arms laterally and is axially limited by a nut. The front wheel 4 is sleeved in the middle of the wheel axle 21 through bearings at both ends, so as to achieve flexible rotation. The eccentric lug 5 adopts a structure in which the annular sleeve and the lug plate are integrally formed. The annular sleeve is coaxially sleeved on the wheel axle 21 through rolling bearings and is located between the two sides of the front wheel 4 and the fork arm mounting plate. The lug plate extends outward along the radial direction of the sleeve to provide a connection point for the linkage rod 6 and the mudguard 41. The eccentric lug 5 possesses dual motion capabilities: it revolves with the front wheel 4 and rotates around the axle 21. The front wheel 4 is fixed to the front fork 2 via the axle 21, ensuring load-bearing and rotational functions during riding. The eccentric lug 5 is coaxially mounted on the axle 21, neither affecting the rotation of the front wheel 4 nor hindering its independent rotation, thus providing a crucial motion basis for the position switching of the mudguard 41. An arc-shaped mudguard 41 is fixedly connected to the eccentric lug 5. The side of the mudguard 41 facing away from the front wheel 4 has a support surface 42, and when riding, the mudguard 41 is positioned above the front wheel 4. The mudguard 41 is made of engineering plastic or lightweight alloy and its arc-shaped contour is adapted to the outer circle of the front wheel 4. It fits the arc of the upper part of the front wheel 4 and can maximize the blocking of mud and sand splash. The mudguard 41 is fixed by the radial support plates 43 at both ends of the eccentric lug 5. The support plates 43 and the edges of the mudguard 41 are connected by welding or integral processing to ensure the rigidity of the connection. The support surface 42 is processed into a flat plane. The surface can be integrally formed or bonded with a wear-resistant and anti-slip structure. When riding, the mudguard 41 is positioned directly above the front wheel 4 under the positioning of the eccentric lug 5, and its arc-shaped inner wall faces the front wheel 4.A linkage rod 6 is also provided between the eccentric ear seat 5 and the fixed bracket 11. One end of the linkage rod 6 is rotatably connected to the eccentric ear seat 5, and the other end is rotatably connected to the fixed bracket 11. The linkage rod 6 adopts a high-strength rigid rod body. One end of the linkage rod 6 is hinged to the ear plate of the eccentric ear seat 5 through the linkage shaft 61. The linkage shaft 61 passes through the ear plate and is limited by the snap ring. The other end is hinged to the preset installation position at the bottom of the fixed bracket 11 through the fixed shaft 62. The fixed shaft 62 and the fixed bracket 11 are also equipped with bearings to ensure smooth rotation. The length of the linkage rod 6 matches the installation position of the fixed shaft 62 and the linkage shaft 61 to ensure that the power transmission is smooth during folding. The linkage rod 6 is used to establish a linkage between the folding action and the turning of the mudguard 41. It converts the revolution of the rotating bracket 3 around the folding axis 31 into the rotation of the eccentric lug 5 around the wheel axle 21. No additional power or manual operation is required; the mudguard 41 can be synchronously driven from the mudguard position to the support position simply by the folding action, realizing the integration of folding and support functions. During folding, the rotating bracket 3 is pushed to rotate and move closer to the vehicle beam 1, which in turn causes the linkage rod 6 to pull the eccentric lug 5 to rotate, causing the mudguard 41 to rotate towards the underside of the front wheel 4 until the support surface 42 contacts the ground to form support.

[0024] Please see Figures 1-9 A folding shaft 31 is fixedly installed on the fixed bracket 11. The rotating bracket 3 is rotatably connected to the fixed bracket 11 through the folding shaft 31. The folding shaft 31 is a cylindrical solid shaft, and its two ends are vertically fixed to the fixed bracket 11 by welding or bolting. A rotation fit section is reserved in the middle of the shaft, and the surface is heat-treated to enhance wear resistance. One end of the rotating bracket 3 is rotatably connected to the folding shaft 31, and a cylindrical connecting sleeve 32 is fixedly installed at the other end of the rotating bracket 3. The front fork 2 is rotatably connected to the rotating bracket 3 through the connecting sleeve 32. The linkage rod 6 is provided with two ends respectively. The device is equipped with a linkage shaft 61 and a fixed shaft 62. The fixed shaft 62 is rotatably connected to the fixed bracket 11, and the linkage shaft 61 is rotatably connected to the eccentric lug 5. Both the linkage shaft 61 and the fixed shaft 62 are cylindrical shafts with annular shoulders at both ends for limiting movement. The shaft surfaces are smooth to reduce rotational friction. The two ends of the fixed shaft 62 are fixed in the pre-set mounting holes of the fixed bracket 11 by the shoulders and retaining rings to prevent axial movement. The linkage shaft 61 passes through the lug through-hole of the eccentric lug 5 and is also limited by retaining rings or shaft retaining rings to ensure a stable rotational connection with the eccentric lug 5. When the rotating bracket 3 rotates around the folding shaft 31, it synchronously drives the front fork 2 and the front wheel 4 to revolve around the folding shaft 31. At the same time, the linkage rod 6 rotates around the fixed shaft 62, which in turn drives the eccentric lug 5 to rotate around the axis of the front wheel 4 through the linkage shaft 61.

[0025] Please see Figures 1-9The axes of the folding pivot 31, fixed pivot 62, and linkage pivot 61 are perpendicular to the travel direction of the front wheel 4. The fixed pivot 62 and the folding pivot 31 are eccentrically mounted on the fixed bracket 11, with the fixed pivot 62 located below the folding pivot 31. The linkage pivot 61 is mounted on the eccentric lug 5 off-center from the axis of the front wheel 4. The fixed pivot 62 and the folding pivot 31 are not concentrically mounted on the fixed bracket 11, and the fixed pivot 62 is located directly below or diagonally below the folding pivot 31, creating a fixed eccentricity between them. The moving shaft 61 is not aligned with the axis of the front wheel 4, but is offset radially outward along the eccentric lug 5, forming an eccentricity with the axis 21 of the front wheel 4. This causes a regular change in the distance between the mounting points at both ends of the linkage rod 6 when the rotating bracket 3 revolves, thereby generating a force to drive the eccentric lug 5 to rotate. The offset of the linkage shaft 61 from the axis 21 of the front wheel 4 provides a torque fulcrum for the rotation of the eccentric lug 5, enabling the pulling force to effectively drive the mudguard 41 to rotate, achieving synchronous linkage between the folding action and the turning of the mudguard 41. After folding, the axes of the fixed shaft 62, the folding shaft 31, and the linkage shaft 61 are aligned, the eccentric lug 5 rotates to its maximum angle, and the support surface 42 of the mudguard 41 forms the maximum contact area with the ground. At this time, the linkage rod 6 is in its fully extended or retracted limit state, and can no longer generate a force to further pull the eccentric lug 5 to rotate, thus limiting the maximum rotation angle of the eccentric lug 5. A wheel axle 21 is fixedly connected to the bottom of the front fork 2. The front wheel 4 is rotatably connected to the front fork 2 via the wheel axle 21. An eccentric lug 5 is rotatably connected to the front wheel 4 via the wheel axle 21. The wheel axle 21 has a solid cylindrical structure, and its two ends are vertically fixed to the fork arm at the bottom of the front fork 2 by welding or flange bolts. The annular sleeve of the eccentric lug 5 is also equipped with a rolling bearing. The inner ring of the bearing mates with the reserved sections on both sides of the wheel axle 21. The eccentric lug 5 is located between the hub of the front wheel 4 and the fork arm of the front fork 2. It is axially limited by the axle shoulder and the retaining ring to prevent it from sliding along the wheel axle 21. Eccentric lugs 5 are provided on both axial sides of the wheel axle 21, and support plates 43 are provided at both ends of the eccentric lug 5 along its radial direction. The support plates 43 are fixedly connected to the mudguard 41. The support plate 43 is a rectangular flat plate structure, which is integrally formed or welded to the annular sleeve of the eccentric ear seat 5. It extends outward along the radial direction of the eccentric ear seat 5. The radial arrangement of the support plate 43 can maximize the transmission of the rotational torque of the eccentric ear seat 5, ensure that the mudguard 41 rotates synchronously with the eccentric ear seat 5, and enhance the structural strength of the mudguard 41 so that it can bear the weight of the whole vehicle when used as a support component and is not easily deformed or damaged.

[0026] Please see Figures 1-9Two sets of connecting rods 71 ​​are fixedly connected to both sides of the axle 21 along the axial direction. The connecting rods 71 ​​are arranged along the radial direction of the front wheel 4, and the ends of the two sets of connecting rods 71 ​​away from the axle 21 are connected to a U-shaped scraper 7. The scraper 7 is in close contact with the inner wall of the mudguard 41, and when the mudguard 41 rotates, the scraper 7 scrapes off the dust attached to the inner wall of the mudguard 41. The scraper 7 is made of an elastic wear-resistant material, specifically one of polyurethane elastomer PU, nitrile rubber NBR, or silicone reinforced composite material. The scraper 7 has a U-shaped structure that fits the arc surface of the inner wall of the mudguard 41. Its two ends are fixed to the free ends of the two sets of connecting rods 71 ​​respectively. The outer arc surface of the scraper 7 is in close contact with the inner wall of the mudguard 41, and the edges of the scraper 7 are rounded to avoid scratching the inner wall of the mudguard 41. The scraper 7, made of elastic material, adheres closely to the mudguard 41 while adapting to the rotation trajectory of the mudguard 41, achieving synchronous dust scraping. It removes deposits from the inner wall of the mudguard 41 during folding without additional power or manual operation. The scraper 7 is positioned at its lowest point behind the front wheel 4. The distance between the two sets of connecting rods 71 ​​is less than the distance between the two sets of eccentric lugs 5, and both sets of eccentric lugs 5 and the two sets of connecting rods 71 ​​are symmetrically arranged with the front wheel 4 as the center. This ensures that the connecting rods 71 ​​and the scraper 7 are located in the area between the two sets of eccentric lugs 5, avoiding interference with the connection structure of the eccentric lugs 5, support plate 43, and mudguard 41.

[0027] Please see Figures 1-9 A wear-resistant and anti-slip layer is fixedly provided on the surface of the support surface 42. The wear-resistant and anti-slip layer can be one of TPU thermoplastic polyurethane rubber, silicone composite material or polyurethane elastomer, and is fixed to the support surface 42 of the mudguard 41 by injection molding or strong bonding. The top of the fork 2 is fixedly connected to the stem tube 9, and the top of the stem tube 9 is fixedly installed with a handle 91. The fixed bracket 11 is inclined with the frame 1; a folding locking mechanism is provided between the fixed bracket 11 and the rotating bracket 3. The folding locking mechanism adopts an eccentric cam structure. The eccentric cam is rotatably installed between the clamps of the rotating bracket 3 through a pin shaft. The eccentric end of the cam is provided with a handle for easy operation. The handle is integrally formed with the cam and extends outward. The fixed bracket 11 is provided with an arc-shaped locking groove at the position corresponding to the cam. The inner wall of the locking groove is machined with anti-slip teeth. At the same time, a return spring is installed on the rotating bracket 3. One end of the spring abuts against the cam, and the other end is fixed on the rotating bracket 3 to provide a continuous locking preload force for the cam. During assembly, the working surface of the cam fits into the locking groove of the fixed bracket 11, and the cam always tends to rotate in the locking direction due to spring preload. A rear mudguard 41 is fixedly installed on the rear wheel 8.

[0028] Please see Figures 1-9When riding, the rotating bracket 3 rotates to unfold the space between the frame 1 and the front fork 2, allowing the front wheel 4 and rear wheel 8 to contact the ground and travel in the direction of the front wheel 4. During riding, the dust kicked up by the rotating front wheel 4 adheres to the arc-shaped mudguard 41 above it, preventing dust from splashing towards the rider. When the electric scooter needs to be stored, first unlock the folding locking mechanism between the fixed bracket 11 and the rotating bracket 3. This folding locking mechanism uses an elastic buckle locking structure, a knob-type threaded locking structure, or an eccentric cam locking structure. Then, push the stem 9 towards the frame 1, causing the rotating bracket 3 to rotate counterclockwise relative to the fixed bracket 11. During the rotation, the front wheel 4 and front fork 2 will rotate counterclockwise around the folding pivot 31 along with the rotating bracket 3. At the same time, since one end of the linkage rod 6 is rotatably connected to the fixed bracket 11 through the fixed shaft 62 and the other end is rotatably connected to the eccentric ear seat 5 through the linkage shaft 61, and the eccentric ear seat 5 can rotate around the wheel... Shaft 21 rotates on its own axis and also revolves around the folding axle 31 with the front wheel 4. Furthermore, the fixed shaft 62 and the folding axle 31 are eccentrically positioned and fixed on the fixed bracket 11, while the linkage shaft 61 is fixed in position on the eccentric lug 5 and offset from the axle 21. The fixed shaft 62 and the linkage shaft 61 are connected by a rigid linkage rod 6 of non-extendable length. When the eccentric lug 5 revolves counterclockwise around the folding axle 31 with the front wheel 4, its trajectory is an arc centered on the folding axle 31. As the revolution angle increases, the straight-line distance between the linkage shaft 61 and the fixed shaft 62 on the arc trajectory gradually increases due to geometric changes. The linkage rod 6 cannot adapt to the increase in distance, thus generating a pulling force along the direction of the linkage rod 6. In order to maintain the distance between the linkage shaft 61 and the fixed shaft 62 always equal to the fixed length of the linkage rod 6, this pulling force will drive the eccentric lug 5 to rotate counterclockwise around the wheel shaft 21. By rotating, the spatial position of the linkage shaft 61 is adjusted to counteract the distance increase trend caused by the revolution. As the eccentric lug 5 continues to rotate counterclockwise around the folding shaft 31, the geometric trend of the distance between the linkage shaft 61 and the fixed shaft 62 continuously increasing always exists. The pulling force of the linkage rod 6 continues to act on the eccentric lug 5, pulling it to rotate counterclockwise continuously, thereby driving the mudguard 41 to move backward. The support surface 42 on one side of wheel 4 gradually approaches the ground; when the axes of the fixed shaft 62, folding shaft 31, and linkage shaft 61 are aligned in a straight line in the order of fixed shaft 62, folding shaft 31, and linkage shaft 61, the linkage shaft 61 reaches the extreme position furthest from the fixed shaft 62 in its revolution trajectory around the folding shaft 31. At this time, the length of the linkage rod 6 is exactly matched with this extreme distance, and it can no longer generate a force to further pull the eccentric lug 5 to rotate. Therefore, the eccentric lug 5 reaches its maximum rotation angle, and this extreme position is at the lowest point of the revolution trajectory. Correspondingly, when the eccentric lug 5 moves to the lowest point, the support surface 42 of the mudguard 41 forms the maximum contact area with the ground. Figure 9As shown, when the electric scooter is placed against a wall or vertically, the vertical projection of its overall center of gravity falls within the grounding area of ​​the support surface 42, which makes the folded electric scooter stable on the ground and not easy to tilt. In actual use, it is recommended to place it close to a wall or support to ensure that the electric scooter will not tip over due to external factors.

[0029] Please see Figures 1-9 During the folding process of the electric scooter, the axial sides of the wheel axle 21 are fixedly connected to U-shaped scrapers 7 by two sets of connecting rods 71 ​​arranged radially along the front wheel 4. The scrapers 7 are close to the inner wall of the mudguard 41 and are located at the lowest point of the mudguard 41. When the mudguard 41 rotates counterclockwise around the wheel axle 21 with the eccentric lug 5, the inner wall of the mudguard 41 always keeps in close contact with the scrapers 7. As the mudguard 41 continues to rotate, the scrapers 7 can scrape off the dust and mud adhering to the inner wall of the mudguard 41 during the ride, thereby effectively reducing the problem of the surface of the mudguard 41 falling off and polluting the indoor environment when the electric scooter is folded and carried indoors for storage.

[0030] Example 2 Please see Figure 10 The linkage rod 6 is a linear actuator. Specifically, it adopts an electric screw-type linear actuator, the main body of which is a hollow shell. Inside the shell, there is a ball screw and a drive motor. One end of the screw extends out of the shell and is connected to a hinge lug, while the other end is connected to the motor output shaft via a coupling. The end of the actuator's shell is rotatably connected to the fixed shaft 62 via a flange. The hinge lug at the end of the screw is engaged with the linkage shaft 61 via a pin, and a fisheye bearing is fitted at the connection to accommodate multi-angle rotation. The actuator is electrically connected to the scooter's control system via a wire. The switch sensor on the folding locking mechanism is linked with the control system signal to realize the automatic start and stop control of the actuator. The electric screw-type actuator can upgrade passive transmission to active control, providing auxiliary power for the folding action, reducing the intensity of manual operation. In addition, it is linked with the control system and can actively adjust the extension amount according to different scenarios, realizing flexible adjustment of the mudguard 41 angle, improving the convenience of folding operation, and expanding the adaptability of the mudguard 41.

[0031] Please see Figure 10When the linkage lever 6 uses a linear actuator, the linear actuator has an active telescopic structure, which can actively control the rotation of the mudguard 41 by actively adjusting its own length. In the folding scenario, after the switch sensor on the folding locking mechanism detects that the mechanism is unlocked, the linear actuator starts the auxiliary folding force to make the folding operation easier. During the unfolding and driving of the electric scooter, the angle of the mudguard 41 can be changed by adjusting the telescopic state of the linear actuator. When the linear actuator retracts, it drives the mudguard 41 to rotate counterclockwise, causing the lowest point of the mudguard 41 to decrease. When the linear actuator extends, it drives the mudguard 41 to rotate clockwise, causing the lowest point of the mudguard 41 to increase. This allows the mudguard 41 to adapt to different driving situations and road conditions and flexibly adjust the mudguarding strategy.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A folding electric scooter, comprising a vehicle beam (1) and a front fork (2), a fixed support (11) is fixedly installed on the front part of the vehicle beam (1), the front fork (2) is rotatably installed on the fixed support (11) through a rotating support (3), and a front wheel (4) is fixedly installed at the bottom of the front fork (2), characterized in that: The front wheel (4) is also coaxially rotatably installed with an eccentric ear seat (5), the eccentric ear seat (5) is fixedly connected with an arc-shaped mudguard (41), the side of the mudguard (41) away from the front wheel (4) is processed with a supporting surface (42), and the mudguard (41) is located above the front wheel (4) in a riding state; a linkage pull rod (6) is further arranged between the eccentric ear seat (5) and the fixed support (11), one end of the linkage pull rod (6) is rotatably connected with the eccentric ear seat (5), and the other end of the linkage pull rod (6) is rotatably connected with the fixed support (11); when folding, the rotating support (3) is pushed to rotate and approach the beam (1), so that the linkage pull rod (6) pulls the eccentric ear seat (5) to rotate, the mudguard (41) is rotated towards the lower side of the front wheel (4), and the supporting surface (42) is in contact with the ground to form a support.

2. The folding electric kick scooter of claim 1, wherein: The fixed support (11) is fixedly installed with a folding rotating shaft (31), the rotating support (3) is rotatably connected between the folding rotating shaft (31) and the fixed support (11), one end of the rotating support (3) is rotatably connected with the folding rotating shaft (31), and the other end of the rotating support (3) is fixedly installed with a cylindrical connecting sleeve (32), the front fork (2) is rotatably connected between the connecting sleeve (32) and the rotating support (3), the linkage pull rod (6) is respectively provided with a linkage shaft (61) and a fixed shaft (62) at both ends, the fixed shaft (62) is rotatably connected with the fixed support (11), and the linkage shaft (61) is rotatably connected with the eccentric ear seat (5); when the rotating support (3) rotates around the folding rotating shaft (31), the front fork (2) and the front wheel (4) are simultaneously driven to revolve around the folding rotating shaft (31), the linkage pull rod (6) rotates around the fixed shaft (62), and the eccentric ear seat (5) is driven to rotate around the axis of the front wheel (4) by the linkage shaft (61).

3. The foldable electric kick scooter according to claim 2, wherein: The axes of the folding rotating shaft (31), the fixed shaft (62) and the linkage shaft (61) are perpendicular to the direction of travel of the front wheel (4), the fixed shaft (62) and the folding rotating shaft (31) are eccentrically arranged on the fixed support (11), the fixed shaft (62) is located below the folding rotating shaft (31), and the mounting position of the linkage shaft (61) on the eccentric ear seat (5) is arranged to deviate from the axis of the front wheel (4); after folding, the axes of the fixed shaft (62), the folding rotating shaft (31) and the linkage shaft (61) are on the same straight line, the eccentric ear seat (5) rotates to the maximum angle, and the supporting surface (42) of the mudguard (41) is in maximum area contact with the ground.

4. The foldable electric kick scooter according to claim 1, wherein: The linkage pull rod (6) is a linear actuator.

5. The foldable electric kick scooter according to claim 1, wherein: A wear-resistant and anti-skid layer is fixedly arranged on the surface of the supporting surface (42).

6. The foldable electric kick scooter according to claim 1, wherein: The front fork (2) bottom fixedly connected with an axle (21), the front wheel (4) through the axle (21) and the front fork (2) rotatably connected, the eccentric lug (5) through the axle (21) and the front wheel (4) rotatable connection; the axle (21) both sides in the axial direction are provided with the eccentric lug (5), and the eccentric lug (5) both ends are provided with support plate (43) along its radial direction, the support plate (43) and the fender (41) between fixedly connected.

7. The foldable electric kick scooter according to claim 6, characterized in that: The axle (21) both sides in the axial direction are also fixedly connected with two groups of connecting rods (71), the connecting rod (71) along the radial direction of the front wheel (4) is provided, and two groups of the connecting rod (71) away from the axle (21) one end is commonly connected with the shape of U-shaped scraper (7), the scraper (7) close to the fender (41) inner wall, and when the fender (41) rotates, the scraper (7) will the fender (41) inside wall surface attached dust scraped off.

8. The foldable electric kick scooter according to claim 7, characterized in that: The spacing between the two groups of connecting rods (71) is less than the spacing between the two groups of eccentric lug (5), and the two groups of connecting rods (71) and the two groups of eccentric lug (5) are symmetrically arranged with the front wheel (4) as the symmetry plane.

9. The foldable electric kick scooter according to claim 1, wherein: The top of the front fork (2) is fixedly connected with a riser (9), and the top of the riser (9) is fixedly installed with a handle (91); the fixed support (11) and the car beam (1) are obliquely arranged; the fixed support (11) and the rotating support (3) are provided with a folding locking mechanism; the tail of the car beam (1) is fixedly installed with a rear wheel (8), and the rear wheel (8) is fixedly provided with a rear fender (41).

10. The foldable electric kick scooter according to claim 7, wherein: The scraper (7) is arranged at the lowest point of the scraper (7) on the rear side of the front wheel (4).

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