Portable folding electric vehicle and method of using the same

Abstract

The present invention provides a portable folding electric vehicle, comprising a front support, wherein a front vertical tube and a front wheel assembly are arranged below the front support from top to bottom, a guide sleeve which can slide up and down along the vertical tube is sleeved on the outside of the front vertical tube, a rear vertical tube is hingedly connected to the right side of the guide sleeve, a rear wheel assembly is arranged below the rear vertical tube, a seat cushion tube which extends to the upper right side and passes through the rear vertical tube is hingedly connected to the lower side of the vertical tube, a connecting rod is arranged between the lower right side of the seat cushion tube and the lower left side of the rear vertical tube, a clamping groove is arranged in the middle part of the right side of the seat cushion tube, and a locking mechanism which is located above the clamping groove and matches with the clamping groove is arranged above the right side of the seat cushion tube. The present invention has a simple structure, a reasonable design, a convenient folding operation and is innovative.

Description

Technical Field

[0001] The invention relates to a portable folding electric vehicle and a use method thereof. Background Art

[0002] Electric vehicles have been developed for quite a long time and have been favored by the public for their low price, convenience, and green environmental protection. They are an optional means of transportation, especially for urban youth or people who travel short distances.

[0003] However, the electric vehicles currently on the market are generally large in size and heavy in weight, which makes them not very convenient to use. In addition, due to their large size, they cannot be carried on buses, subways and other means of transportation, nor can they be placed in the trunk of a car, so their use is greatly restricted, and it is also not conducive to the renewal and development of the electric vehicle industry.

[0004] Most of the existing foldable electric vehicles have complex structures and cumbersome folding operations, which brings inconvenience to users. Summary of the invention

[0005] The present invention improves the above-mentioned problem, that is, the technical problem to be solved by the present invention is a portable folding electric vehicle and a method for using the same, which has a simple structure and is easy to operate.

[0006] The specific implementation scheme of the present invention is: to provide a portable folding electric vehicle, including a front bracket, a front riser and a front wheel assembly are arranged from top to bottom below the front bracket, a guide sleeve is provided on the outside of the front riser, a rear riser is hinged on the right side of the guide sleeve, a rear wheel assembly is provided below the rear riser, a seat cushion tube extending to the upper right side and passing through the rear riser is hinged on the lower side of the front riser, a connecting rod is provided between the lower right side of the seat cushion tube and the lower left side of the rear riser, a slot is provided in the middle right side of the rear riser, and a locking mechanism is provided on the upper right side of the seat cushion tube, which is located above the slot and cooperates with the slot.

[0007] Furthermore, the locking mechanism includes a U-shaped seat fixed on the side of the seat cushion tube, an arc-shaped handle is arranged in the opening of the U-shaped seat, a rotating shaft passing through the U-shaped seat and the arc-shaped handle is arranged outside the U-shaped seat, a torsion spring is sleeved on the rotating shaft and is located between the U-shaped seat and the arc-shaped handle, and the left side of the arc-shaped handle has a hook portion for being inserted into a slot.

[0008] Furthermore, a clamping mechanism for controlling the movement or locking of the front stand pipe and the seat cushion pipe is provided at the hinged position between the front stand pipe and the seat cushion pipe, the clamping mechanism includes a rounded plate fixed to the right side of the front stand pipe, a groove for placing the rounded plate is provided in the middle of the left end of the seat cushion pipe, a limiting sleeve penetrating the rounded plate and the seat cushion pipe is provided in the seat cushion pipe, a first button cover and a second button cover are respectively provided on both sides of the limiting sleeve, a polygonal cylinder is provided in the middle of the first button cover, the first button cover and the polygonal cylinder are integrated, and a stepped portion is coaxially fixed to the side of the polygonal cylinder A ladder shaft, the diameter of the stepped shaft is smaller than the polygonal cylinder, a cylinder is fixed to the side of the second button cover, and a slot is provided at one end of the cylinder close to the stepped shaft for inserting the end of the stepped shaft, and a compression spring is provided outside the stepped shaft between the polygonal cylinder and the cylinder, and a spacing is provided between the inner side surface of the second button cover and the end surface of the limiting sleeve close to the second button cover, and the inner side surface of the first button cover is fitted with the end surface of the limiting sleeve close to the first button cover; a square groove is provided on the inner side surface of the first button cover, and a clamping block that engages with the square groove is provided on the end surface of the seat cushion tube close to the first button cover.

[0009] Furthermore, the interior of the left side of the limiting sleeve is a polygonal groove that matches the polygonal column, and the interior of the right side of the limiting sleeve is a circular groove. The polygonal groove and the circular groove are coaxially arranged and the maximum width of the polygonal groove is smaller than the diameter of the circular groove. The polygonal groove is connected to the circular groove; a positioning groove is provided on the outside of the limiting sleeve, and a positioning strip that matches the positioning groove is provided on the inner side of the hole of the rounded corner plate.

[0010] Furthermore, a front fork tube penetrating the front riser is provided inside the front riser along the length direction of the front riser, the upper end of the front fork tube is fixedly connected to the lower part of the head support, and the lower end of the front fork tube is fixedly connected to the front wheel assembly.

[0011] Furthermore, a groove for the seat tube to pass through is provided at the upper portion of the rear vertical tube; and a seat cushion is provided at the upper end of the seat tube.

[0012] Furthermore, a pair of handlebars for folding up and down are symmetrically arranged on both sides of the front bracket, and a sliding sleeve locking mechanism is provided on the lower part of the front bracket, which can move up and down along the lower part of the head bracket and limit the position. A pair of pull rods are symmetrically arranged on both sides of the sliding sleeve locking mechanism, and the lower end of each pull rod is hinged to the sliding sleeve locking mechanism, and the upper end of the pull rod is hinged to the lower part of the handlebar.

[0013] Furthermore, the sliding sleeve locking mechanism includes a sliding sleeve, a curved locking handle is hingedly provided on the side of the sliding sleeve, and a limiting protrusion is provided on the inner side of the curved locking handle; two limiting grooves are provided on the lower side of the headstock bracket from top to bottom for the limiting protrusion of the curved locking handle to fit in; the lower side of the sliding sleeve has a through groove located on the inner side of the curved protrusion, so as to facilitate the curved protrusion to fit into the limiting groove of the headstock bracket.

[0014] Furthermore, a guide groove is longitudinally arranged at the lower part of the head support, and a guide piece is arranged on the outside of the sliding sleeve and passes through the sliding sleeve and the guide groove in sequence.

[0015] Furthermore, a method for using a portable folding electric vehicle comprises the following steps: (1) when folding the vehicle body, pressing the arc-shaped handle, the arc-shaped handle actively rotates around the rotation axis, the hook portion is disengaged from the slot, and the locking mechanism is unlocked; (2) lifting the upper part of the electric vehicle seat tube upward to fold it, the front vertical tube, the rear vertical tube, the connecting rod, and the seat tube are linked and folded together, and the folding electric vehicle is folded and stored. After the front and rear wheels are folded and brought close together, the block on the arc plane at the lower end of the seat tube is rotated to align with the inner side square groove of the button cover, and the locking mechanism is automatically locked to ensure that the folded electric vehicle body remains in the folded state; (3) when folding the handlebars, unlock the arc-shaped handlebars, hold the handlebars and fold them from top to bottom around the hinge, slide the sliding sleeve downward, re-lock the arc-shaped handlebars, and the arc-shaped protrusion is inserted into the limit groove located below; (4) after the vehicle body and handlebars are folded, The bicycle can be stored; (5) When unfolding the bicycle body, unlock the clamping mechanism and press the second button cover. The second button cover pushes the stepped shaft, the polygonal column and the first button cover to move. The square groove disengages the clamping block, realizing the movable hinge connection between the front seat tube and the seat tube. The seat tube and the rear column are pulled outward. The front seat tube, the rear seat tube, the connecting rod and the seat tube are opened in a coordinated manner. The arc handle is pressed and the hook part is inserted into the slot. The arc handle is released. Under the elastic force of the torsion spring, the hook part of the arc handle is kept in the slot. (7) When unfolding the handlebar, unlock the arc handle, hold the handlebar and fold it around the hinge from bottom to top. The pull rod is linked and the sliding sleeve slides upward. The handlebar is opened and the arc handle is locked again. The arc protrusion can be inserted into the limit slot at the top to lock the handlebar. (8) After the bicycle body and the handlebar are unfolded, the bicycle can be ridden normally.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the device has a simple structure, reasonable design, convenient operation, small size, light weight, and can be unlocked for storage or use with one button, which brings convenience to users and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of unfolding a foldable electric vehicle according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of folding a foldable electric vehicle according to an embodiment of the present invention;

[0019] Figure 3 It is a partial schematic diagram of a rear seat tube and a seat cushion tube according to an embodiment of the present invention;

[0020] Figure 4 for Figure 1 BB of the cross-sectional view;

[0021] Figure 5This is a schematic diagram of the position structure of the locking mechanism according to an embodiment of the present invention;

[0022] Figure 6 An exploded view of the locking mechanism of an embodiment of the present invention;

[0023] Figure 7 for Figure 5 Sectional view CC;

[0024] Figure 8 An exploded view of the clamping mechanism of an embodiment of the present invention;

[0025] Fig. 9 This is a schematic diagram of the structure of a limiting sleeve according to an embodiment of the present invention;

[0026] Fig.10 This is a schematic diagram of the handlebar in an unfolded state according to an embodiment of the present invention;

[0027] Fig.11 This is a schematic diagram of a handlebar in a closed state according to an embodiment of the present invention;

[0028] Fig.12 This is a schematic diagram of another handlebar structure in a closed state according to an embodiment of the present invention;

[0029] Fig.13 An exploded view of the sliding sleeve locking mechanism and the front bracket of an embodiment of the present invention;

[0030] Fig.14 This is a three-dimensional diagram of a vehicle head support according to an embodiment of the present invention;

[0031] Fig.15 This is a front view of a vehicle head support according to an embodiment of the present invention;

[0032] Fig.16 for Fig.15 Section view AA.

[0033] In the figure: A1-seat cushion, A2-front riser, A3-front wheel assembly, A4-guide sleeve, A5-rear riser, A51-slot, A52-through slot, A6-rear wheel assembly, A7-seat cushion tube, A71-slot, A72-block, A8-clamping mechanism, A81-rounded plate, A811-positioning strip, A82-limiting sleeve, A821-polygonal groove, A822-round groove, A823-positioning groove, A83-first button cover, A831-square groove, A84-second button cover, A85-polygonal body, A86-stepped shaft, A87-cylinder, A871-hole, A88-compression spring, A9-locking mechanism, A91-U-shaped seat, A92-arc handle, A93-rotating shaft, A94-torsion spring, A95-hook, A10-front fork tube, A11-connecting plate, A12-connecting rod; B1-front bracket, B11-limiting groove, B12-guide groove, B13-U-shaped groove, B2-handlebar, B21-bottom plate, B3-slide locking mechanism, B31-slide, B311-through groove, B32-arc locking handle, B33-limiting protrusion, B34-side plate, B35-hinge plate, B4-pull rod, B5-anti-slip sleeve, B6-hinge, B7-guide. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example: Figures 1 to 16 As shown, in this embodiment, a foldable electric vehicle is provided, including a front bracket B1, a front riser A2 and a front wheel assembly A3 are arranged below the front bracket from top to bottom, a guide sleeve A4 is provided on the outer sleeve of the front riser, the guide sleeve is fixed on the front riser, a rear riser A5 is hinged on the right side of the guide sleeve, a rear wheel assembly A6 is arranged below the rear riser, a seat cushion tube A7 extending to the upper right side and passing through the rear riser is hinged on the lower side of the riser, a connecting rod A12 is arranged between the lower right side of the seat cushion tube and the lower left side of the rear riser, the left end of the connecting rod is hinged to the seat cushion tube, and the right end of the connecting rod is hinged to the rear riser, a clamping groove A51 is arranged in the middle of the right side of the rear riser, and a locking mechanism A9 located above the clamping groove side and matched with the clamping groove is arranged above the right side of the seat cushion tube.

[0036] The seat tube and the rear stand tube are arranged crosswise.

[0037] The above-mentioned locking mechanism A9 includes a U-shaped seat A91 fixed to the side of the seat tube, an arc-shaped handle A92 is arranged in the opening of the U-shaped seat, and a rotating shaft A93 passing through the U-shaped seat and the arc-shaped handle is arranged outside the U-shaped seat, and the arc-shaped handle rotates around the rotating shaft; a torsion spring A94 is sleeved on the rotating shaft and is located between the U-shaped seat and the arc-shaped handle, and the left side of the arc-shaped handle has a hook portion A95 for being inserted into a slot; one side of the torsion spring is fixed to the inner wall of the U-shaped seat, and the other side of the torsion spring is fixed to the arc-shaped handle; when unlocking, when the user presses the arc-shaped handle to rotate along the rotating shaft, the hook portion is disengaged from the slot, pulling the seat tube upward, and the front vertical tube, the rear vertical tube, the connecting rod, and the seat tube are linked to fold and store the foldable electric vehicle.

[0038] In this embodiment, a clamping mechanism A8 for controlling the movement or locking of the front standpipe and the seat cushion tube is provided at the hinged position between the front standpipe and the seat cushion tube, the clamping mechanism includes a rounded plate A81 fixed to the right side of the front standpipe, a slot A71 for placing the rounded plate is provided in the middle of the left end of the seat cushion tube, a limiting sleeve A82 penetrating the rounded plate and the seat cushion tube is provided in the seat cushion tube, a first button cover A83 and a second button cover A84 are respectively provided on both sides of the limiting sleeve, a polygonal column A85 is provided in the middle of the first button cover, the first button cover and the polygonal column are integrated, and a stepped cover A85 is coaxially fixed to the side of the polygonal column. Ladder shaft A86, the diameter of the stepped shaft is smaller than that of the polygonal cylinder, a cylinder A87 is fixed on the side of the second button cover, and a hole A871 is provided at one end of the cylinder close to the stepped shaft for inserting the end of the stepped shaft, and a compression spring A88 is provided outside the stepped shaft between the polygonal cylinder and the cylinder, and a spacing is provided between the inner side surface of the second button cover and the end surface of the limiting sleeve close to the second button cover, and the inner side surface of the first button cover is fitted with the end surface of the limiting sleeve close to the first button cover; a square groove A831 is provided on the inner side surface of the first button cover, and a clamping block A72 which is engaged with the square groove is provided on the end surface of the seat cushion tube close to the first button cover.

[0039] The left side of the above-mentioned limiting sleeve is internally a polygonal groove A821 that matches the polygonal cylinder. The polygonal cylinder and the polygonal groove can be hexagonal. The right side of the limiting sleeve is internally a circular groove A822. The polygonal groove is coaxially arranged with the circular groove and the maximum width of the polygonal groove is smaller than the diameter of the circular groove. The polygonal groove is connected with the circular groove.

[0040] In order to prevent the limiting sleeve from rotating and the block on the inner side of the first button cover from rotating to a position that does not match the square groove, thereby affecting the locking function, a positioning groove A823 is provided on the outside of the limiting sleeve, and a positioning strip A811 matching the positioning groove is provided on the inner side of the hole of the rounded corner plate.

[0041] The polygonal column, stepped shaft and spring are all located inside the limiting sleeve.

[0042] When opening, by pressing the second button cover, the second button cover pushes the stepped shaft, the polygonal cylinder and the first button cover to move, and the square groove disengages the card block to realize the movable hinge connection between the front vertical tube and the seat cushion tube; when folding, the arc handle is pressed to unlock, the hook part disengages from the card slot, the locking mechanism is unlocked, the upper part of the electric vehicle seat cushion tube is pulled upward, the front vertical tube, the rear vertical tube, the connecting rod, and the seat cushion tube are linked to fold and store the foldable electric vehicle, and when the front and rear wheels are folded and brought closer, with the rotation and coordination of the front vertical tube and the seat cushion tube, the card block rotates to the square groove position, and under the elastic force of the compression spring, the card block automatically snaps into the square groove and is locked.

[0043] In order to enhance the stability of the frame, a front fork tube A10 penetrating the front riser is provided inside the front riser along the length direction of the front riser, the upper end of the front fork tube is fixedly connected to the lower part of the head support, and the lower end of the front fork tube is fixedly connected to the front wheel assembly.

[0044] In order to facilitate the swinging of the seat tube, a through groove A52 for the seat tube to pass through is provided on the upper portion of the rear vertical tube.

[0045] In order to facilitate the user's riding, a seat cushion A1 is provided at the upper end of the seat cushion tube.

[0046] In this embodiment, a connecting plate A11 is fixed to the side of the guide sleeve, and the connecting plate is hinged to the upper end of the rear vertical pipe.

[0047] When folding, the arc handle is pressed to unlock, the hook part is disengaged from the slot, the locking mechanism is unlocked, the upper part of the electric vehicle seat tube is lifted up for folding, the front vertical tube, the rear vertical tube, the connecting rod, and the seat tube are linked and folded, and the foldable electric vehicle is folded and stored. When the front and rear wheels are folded and closed, the arc plane clamping block at the lower end of the seat tube is transferred to align with the square groove on the inner side of the button cover, and the clamping mechanism is automatically locked under the elastic force of the compression spring to ensure that the folded electric vehicle body remains in the folded state; when unfolding and using, the clamping mechanism is unlocked, the second button cover is pressed, the second button cover pushes the stepped shaft, the polygonal column and the first button cover to move, the square groove is disengaged from the clamping block, the front vertical tube and the seat tube are hinged, the seat tube and the rear vertical column are pulled outward, the front vertical tube, the rear vertical tube, the connecting rod, and the seat tube are linked and opened, the arc handle is pressed, the hook part is clamped into the slot hole, the arc handle is released, and the hook part of the arc handle is kept clamped in the slot under the elastic force of the torsion spring.

[0048] In this embodiment, a pair of handlebars B2 for folding up and down are symmetrically arranged on both sides of the front bracket B1, and a sliding sleeve locking mechanism B3 is provided at the lower part of the front bracket, which can move up and down along the lower part of the front bracket and limit the position. A pair of pull rods B4 are symmetrically arranged on both sides of the sliding sleeve, and the lower end of each pull rod is hinged to the sliding sleeve locking mechanism, and the upper end of the pull rod is hinged to the lower part of the handlebar.

[0049] The above-mentioned sliding sleeve locking mechanism B3 includes a sliding sleeve B31, a side of which is hingedly provided with an arc-shaped locking handle B32, and the inner side of the arc-shaped locking handle is provided with a limiting protrusion B33; the lower part of the above-mentioned sliding sleeve side is provided with a through groove B311, and the through groove is located on the inner side of the arc-shaped protrusion, so as to facilitate the arc-shaped protrusion to pass through the through groove and be stuck in the limiting groove B11 of the head bracket.

[0050] When in the stowed state, the arc-shaped lock handle is closed and locked, and the limit protrusion is stuck in the limit groove under the head bracket; when folded to the unfolded state, the arc-shaped lock handle is opened, and the limit block is removed from the limit groove and unlocked, so that the sliding sleeve can move upward, and after the handlebar is in the open state, the arc-shaped lock handle is locked again to prevent the handlebar from being unsecured during use, causing it to be unusable or causing safety hazards.

[0051] The above-mentioned front bracket is in a "T" shape, and two limiting grooves B11 are provided on the lower side of the front bracket from top to bottom for the limiting protrusion of the arc-shaped lock handle to fit in.

[0052] The lower part of the head support is longitudinally provided with a guide groove B12, and the outer part of the sliding sleeve is provided with a guide member 7 which penetrates the sliding sleeve and the guide groove in sequence; when the sliding sleeve slides upward or downward, the guide groove and the guide member play a limiting role. The lower part of the head support may also be provided with no guide groove, and the sliding sleeve is directly sleeved on the lower part of the head support, and when actuated, the sliding sleeve moves up and down along the head support.

[0053] In order to enhance the friction and comfort of the user holding the handlebar, an anti-slip cover 5 is provided at the outer end of each handlebar, and the protective cover is wavy.

[0054] A U-shaped groove B13 is provided in the middle of both sides of the above-mentioned front bracket, and the opening of the U-shaped groove faces the direction of the handlebar. The U-shaped groove vertically penetrates the front bracket, the handlebar is placed in the U-shaped groove and a hinge B6 is provided on the outside of the handlebar from front to back, which penetrates the head bracket, the U-shaped groove and the handlebar, so as to realize the handlebar being folded downward from a horizontal state to a longitudinal storage state around the hinge.

[0055] In this embodiment, side plates B34 are fixed above both sides of the sliding sleeve, a bottom plate B21 is fixed below each handlebar, the upper end of the pull rod is hinged to the bottom plate, and the lower end of the pull rod is hinged to the side plate.

[0056] In this embodiment, a hinge plate B35 is fixed to the lower part of the sliding sleeve, and the arc-shaped lock handle is hinged to the hinge plate. A bolt is provided on the outside of the hinge plate, which passes through the hinge plate and the arc-shaped handle longitudinally in sequence, so as to realize the unlocking of the arc-shaped lock handle by flipping along the bolt.

[0057] In this embodiment, when in use, the curved handle is unlocked, the handlebar is held and folded from bottom to top around the hinge, the sliding sleeve slides upward, the handlebar is opened, and the curved handle is locked again, and the curved protrusion can be stuck in the limiting groove located above; after use, the curved handle is unlocked, the handlebar is held and folded from top to bottom around the hinge, the sliding sleeve is reset, and the curved handle is locked again, and the curved protrusion is stuck in the limiting groove located below.

[0058] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0059] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0060] At the same time, if the above-mentioned invention discloses or involves the protection of components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0061] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0062] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A portable folding electric vehicle, characterized in that: The invention comprises a front frame, a front stand pipe and a front wheel assembly are arranged below the front frame from top to bottom, a guide sleeve is arranged outside the front stand pipe, a rear stand pipe is hingedly connected to the right side of the guide sleeve, a rear wheel assembly is arranged below the rear stand pipe, a seat pipe extending to the upper right side and passing through the rear stand pipe is hingedly connected to the lower side of the front stand pipe, a connecting rod is arranged between the lower right side of the seat pipe and the lower left side of the rear stand pipe, a clamping groove is arranged in the middle right side of the rear stand pipe, and a locking mechanism is arranged above the clamping groove and matched with the clamping groove on the upper right side of the seat pipe; The locking mechanism comprises a U-shaped seat fixed to the side of the seat tube, an arc-shaped handle is arranged in the opening of the U-shaped seat, a rotating shaft passing through the U-shaped seat and the arc-shaped handle is arranged outside the U-shaped seat, a torsion spring located between the U-shaped seat and the arc-shaped handle is sleeved on the rotating shaft, and a hook portion for being inserted into a slot is provided on the left side of the arc-shaped handle; A clamping mechanism for controlling the movement or locking of the front standpipe and the seat cushion tube is provided at the hinged position between the front standpipe and the seat cushion tube, the clamping mechanism comprises a rounded plate fixed to the right side of the front standpipe, a groove for placing the rounded plate is provided in the middle of the left end of the seat cushion tube, a limiting sleeve penetrating the rounded plate and the seat cushion tube is provided in the seat cushion tube, a first button cover and a second button cover are provided on both sides of the limiting sleeve, a polygonal cylinder is provided in the middle of the first button cover, the first button cover and the polygonal cylinder are integrated, a stepped shaft is coaxially fixed to the side of the polygonal cylinder, the stepped shaft has a smaller diameter than the polygonal cylinder, a cylinder is fixed to the side of the second button cover, a slot for inserting the end of the stepped shaft is provided at one end of the cylinder close to the stepped shaft, a compression spring is provided between the polygonal cylinder and the cylinder, a spacing is provided between the inner side surface of the second button cover and the end surface of the limiting sleeve close to the second button cover, and the inner side surface of the first button cover fits with the end surface of the limiting sleeve close to the first button cover.

2. A portable folding electric vehicle according to claim 1, characterized in that: The inner side surface of the first button cover is provided with a square groove, and the end surface of the seat cushion tube close to the first button cover is provided with a clamping block that is clamped and matched with the square groove.

3. A portable folding electric vehicle according to claim 1, characterized in that: The interior of the left side of the limiting sleeve is a polygonal groove that matches the polygonal column, and the interior of the right side of the limiting sleeve is a circular groove. The polygonal groove and the circular groove are coaxially arranged and the maximum width of the polygonal groove is smaller than the diameter of the circular groove. The polygonal groove is connected to the circular groove; a positioning groove is provided on the outside of the limiting sleeve, and a positioning strip that matches the positioning groove is provided on the inner side of the hole of the rounded corner plate.

4. A portable folding electric vehicle according to claim 1, characterized in that: A front fork tube penetrating the front stand pipe is arranged inside the front stand pipe along the length direction of the front stand pipe, the upper end of the front fork tube is fixedly connected to the lower part of the vehicle head support, and the lower end of the front fork tube is fixedly connected to the front wheel assembly.

5. The portable folding electric vehicle according to claim 1, characterized in that: A through groove for the seat cushion tube to pass through is arranged on the upper part of the rear vertical tube; and a seat cushion is arranged on the upper end of the seat cushion tube.

6. A portable folding electric vehicle according to claim 3, characterized in that: A pair of handlebars for folding up and down are symmetrically arranged on both sides of the front bracket, and a sliding sleeve locking mechanism is sleeved on the lower part of the front bracket, which can move up and down along the lower part of the front bracket and limit the position. A pair of pull rods are symmetrically arranged on both sides of the sliding sleeve locking mechanism, and the lower end of each pull rod is hinged to the sliding sleeve locking mechanism, and the upper end of the pull rod is hinged to the lower part of the handlebar.

7. A portable folding electric vehicle according to claim 6, characterized in that: The sliding sleeve locking mechanism includes a sliding sleeve, a curved locking handle is hingedly provided on the side of the sliding sleeve, and a limiting protrusion is provided on the inner side of the curved locking handle; two limiting grooves are provided on the lower side of the headstock bracket from top to bottom for the limiting protrusion of the curved locking handle to fit in; the lower side of the sliding sleeve has a through groove located on the inner side of the curved protrusion to facilitate the curved protrusion to fit into the limiting groove of the headstock bracket.

8. A portable folding electric vehicle according to claim 7, characterized in that: A guide groove is longitudinally arranged at the lower part of the vehicle head support, and a guide piece which passes through the slide sleeve and the guide groove in sequence is arranged outside the slide sleeve.

9. A method of using the portable folding electric vehicle as claimed in claim 7, characterized in that: The method comprises the following steps: (1) when folding the vehicle body, pressing the arc-shaped handle, the arc-shaped handle actively rotates around the rotating shaft, the hook part is disengaged from the slot, and the locking mechanism is unlocked; (2) lifting the upper part of the electric vehicle seat tube upward to fold it, the front vertical tube, the rear vertical tube, the connecting rod, and the seat tube are linked and folded together, and the foldable electric vehicle is folded and stored. When the front and rear wheels are folded and brought close together, the block on the arc plane at the lower end of the seat tube is rotated to align with the inner side square groove of the button cover, and the locking mechanism is automatically locked to ensure that the folded electric vehicle body remains in the folded state; (3) when folding the handlebar, unlocking the arc-shaped handlebar, holding the handlebar from top to bottom and folding it around the hinge, the sliding sleeve slides downward, re-locking the arc-shaped handlebar, and the arc-shaped protrusion is inserted into the limit groove located below; (4) after the body and handlebar are folded, they can be stored; (5) When unfolding the vehicle body, unlock the clamping mechanism and press the second button cover. The second button cover pushes the stepped shaft, the polygonal column and the first button cover to move, and the square groove disengages the clamping block, realizing the movable hinge connection between the front seat tube and the seat tube. Pull the seat tube and the rear column outward, and the front seat tube, the rear seat tube, the connecting rod and the seat tube are opened in a coordinated manner. Press the arc handle, and the hook part is locked in the slot. Release the arc handle. Under the elastic force of the torsion spring, the hook part of the arc handle is kept in the slot; (7) When unfolding the handlebar, unlock the arc handle, hold the handlebar and fold it around the hinge from bottom to top, the pull rod is linked, the sliding sleeve slides upward, the handlebar is opened, and the arc handle is locked again. The arc protrusion can be locked in the limit slot at the top to lock the handlebar; (8) After the vehicle body and handlebar are unfolded, it can be used for normal riding.

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