Electric folding bicycle

Abstract

According to the electric folding bicycle, the design that the bottom plate can be folded in half is adopted, a front wheel frame of the front bicycle frame is rotationally connected with the front cross rod, and therefore a control rod can be rotationally folded and stored relative to the bottom frame, a front limiting supporting plate is arranged at the folding connection position and provided with a positioning notch, and a movable lock catch mechanism is arranged at the position, matched with the positioning notch, of the end of the front cross rod. Concave-convex locking matching is formed through the lock pin structure and the positioning groove opening, so that the angle between the front cross rod and the front wheel frame or the angle between the front cross rod and the front control rod assembly can be fixed, firstly, it can be guaranteed that the front control rod assembly can rotate and be folded to a smaller included angle relative to the front frame through the rotating folding locking structure, and therefore the good folding storage effect is achieved; on the basis, a good positioning effect can be achieved in the unfolded state of the vehicle body through cooperation between the positioning notch and the lock pin, and the positioning structure can achieve convenient unlocking so that unlocking storage can be rapidly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical device equipment, and more specifically, to an electric folding vehicle. Background Art

[0002] With the continuous increase of the domestic elderly population base and the continuous improvement of the diverse travel needs of special disabled groups, electric folding vehicles and electric wheelchairs have gradually become indispensable means of transportation in the market. An electric wheelchair is a mechanical device equipped with a power drive device on the basis of a traditional hand-cranked wheelchair. Most electric wheelchairs are mainly composed of several parts such as a wheelchair frame, a drive motor, a controller, and a battery. An electric folding vehicle has greater freedom of use and relatively lower protection performance compared to an electric wheelchair. A commonly used and mature design usually includes a fixed or foldable bottom frame, a vertically fixed or bendable operating rod (handlebar of the vehicle head), and a fixed or foldable seat located on the bottom frame. The bottom frame is installed with wheels, a drive motor, and sometimes a battery. According to different usage requirements, there are also several different designs for the folding and storage methods of the operating rod and the seat.

[0003] Currently, there are generally some drawbacks in the folding and storage methods of electric folding vehicles, which are mainly reflected in the following aspects:

[0004] Although the common folding vehicle designs on the market can effectively reduce the storage volume of the wheelchair, the folded vehicle often still occupies a relatively large space. Secondly, the operation of folding the folding vehicle often requires multiple folding and storage steps and is not easy to operate manually, which is not user-friendly enough for the users of the product, and it is very difficult for actual users to perform quick and convenient folding and storage operations by themselves.

[0005] In summary, the folding design of the existing electric folding vehicle has structural defects, resulting in the technical problems of still occupying a large storage space and being difficult to fold. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is that the folding design of the existing electric folding vehicle has structural defects, resulting in the technical problems of still occupying a large storage space and being difficult to fold.

[0007] To solve the above problems, the present utility model provides an electric folding vehicle, which includes a chassis assembly, a seat assembly and a front control rod assembly. The chassis assembly includes a front frame and a rear frame that are foldably connected. The front frame includes a front wheel frame for mounting a front wheel, a front cross bar rotatably connected to both ends of the front wheel frame, and a front pedal supported by the top of the front cross bar. The front wheel frame is vertically and positionally connected to the front control rod assembly. An end of the front wheel frame is fixedly connected with a front limit support plate. A positioning notch is provided on one side of the front limit support plate facing the rear frame. An end of the front cross bar is provided with a movable locking mechanism. The movable locking mechanism includes a lock frame fixedly installed on the front cross bar and a lock pin movably connected to the lock frame. Through the limiting cooperation between the lock pin in the extended state and the positioning notch, the relative angle between the front cross bar and the front wheel frame is locked when the front cross bar is perpendicular to the front control rod assembly.

[0008] The electric folding vehicle provided by the present utility model adopts a design in which the bottom plate can be folded in half. The front frame at the front of the chassis assembly includes a front wheel frame connecting the wheel and the front control rod assembly. The front wheel frame is rotatably connected to the front cross bar of the front frame, so as to realize the rotational folding and storage of the control rod relative to the chassis. A front limit support plate is provided at the folding connection position. A positioning notch is provided on the side edge of this structure. The end of the front cross bar is rotatably connected to the front limit support plate. A movable locking mechanism is provided at the position of the end of the front cross bar that cooperates with the positioning notch. Through the extendable lock pin structure therein, it can form a concave-convex locking cooperation with the positioning notch, so as to fix the angle between the front cross bar and the front wheel frame, or rather, between the front cross bar and the front control rod assembly. This rotational folding and locking structure can first ensure that the front control rod assembly can be rotated and folded relative to the front frame to a smaller included angle, so as to achieve a good folding and storage effect. On this basis, through the cooperation between the positioning notch and the lock pin, a good positioning effect can be achieved in the unfolded state of the vehicle body, and this positioning structure can be unlocked conveniently to quickly realize unlocking and storage, effectively solving the technical problems that the folding design of the existing electric folding vehicle has structural defects, resulting in a still relatively large occupied storage space and difficult folding operation.

[0009] As a preferred solution, one end of the lock frame is pin-connected with the front limit support plate, and the lock frame is also provided with a slide groove structure for accommodating the sliding of the lock pin. The lock pin is T-shaped and both ends are horizontally accommodated in the slide groove structure. The tail end of the lock pin is connected to a control pull rope, which is used to pull the lock pin to unlock through the control pull rope. This design optimizes the structure of the movable locking mechanism, wherein a slide groove structure for guiding the lock pin is provided on the lock frame, and the lock pin adopts a T-shaped structure to ensure the effect. The lateral part of the lock pin can adapt to the slide groove structure, and has a certain lateral width to facilitate stable matching with the slide groove structure, and can ensure stable support with the positioning notch of the front limit support plate. The tail end of the T-shaped lock pin is connected to the control pull rope, which can conveniently drive the lock pin to unlock from the positioning notch through a pulling action, further simplifying the folding storage and unlocking operations.

[0010] As a preferred solution, the front frame also includes front connecting rods arranged in parallel with the front cross bars, one end of the front connecting rod is hinged to a preset spacing position below the positioning notch of the front limit support plate, and the other end of the front connecting rod is used for rotational connection with the rear frame. This design optimizes the overall design of the front frame. In addition to a pair of front cross bars constituting the overall frame, a front connecting rod is arranged at each front cross bar position. The structure of the front connecting rod assists in supporting the connection, as well as rotating and folding for storage. Since the front cross bar and the front connecting rod are respectively hinged to the front limit support plate at different positions, a good folding effect can be achieved during rotational folding.

[0011] As a preferred solution, the rear frame includes a pair of rear cross bars parallel to the front cross bar in the unfolded state, and the ends of the rear cross bars are rotatably connected to the front cross bars on the corresponding side through a folding switching mechanism. The rear frame also includes a pair of rear connecting rods, one end of which is slidably connected to the rear frame on the corresponding side, and the other end is rotatably connected to the front cross bar and the front connecting rod on the corresponding side. This design optimizes the switching matching structure between the front frame and the rear frame, and the entire rear frame is also supported by two rear cross bars, one end of the rear connecting rod is hinged to the front cross bar and the other end is slidably matched with the rear cross bar to provide sliding freedom when folded and stored.

[0012] As a preferred solution, the folding switching mechanism includes a positioning elbow fixedly connected to the end of the front crossbar, and also includes a rear limit support plate fixedly connected to the end of the rear crossbar; the rear limit support plate can be slidably connected to the limit support rod, and the upper part of the positioning elbow is provided with a positioning boss for abutting against the limit support rod to position the rear frame parallel to the front frame. This design optimizes the switching structure between the front frame and the rear frame, and the positioning elbow and the rear limit support plate are respectively provided at the respective docking positions of the front crossbar and the rear crossbar. Through the concave and convex limit cooperation of the two structures, the relative angle between the front frame and the rear frame can be positioned at a flat angle position, thereby ensuring that the chassis assembly can be well fixed in the fully opened state.

[0013] As a preferred solution, the rear limit support plate is a double-plate structure with a slot in the middle. The front end of the positioning elbow is accommodated in the slot of the rear limit support plate. A thickened limit block structure is provided at the base of the positioning elbow. The edge of the limit block structure is in shape-fitting contact with the edge of the rear limit support plate to position the rear frame in a posture parallel to the front frame. This design optimizes the structures of the rear limit support plate and the cooperating positioning elbow. The overall structure of the rear limit support plate is a double-plate structure with a slot in the middle. The positioning elbow is plate-shaped and can just be accommodated in the slot in the middle of the rear limit support plate. The thickness of the base of the positioning elbow is increased. When the positioning elbow rotates to the limit angle of the limit strut, the side edges of the positioning elbow and the rear limit support plate form concave-convex limits, increasing the area of the limit support and avoiding stress concentration, making the structure more durable.

[0014] As a preferred solution, a protruding hinge platform is provided at a preset distance from the end of the front crossbar and the positioning elbow. One end of the rear connecting rod is hinged to the hinge platform. An integrally fixed storage chute is provided on the upper side of the rear frame in a fitting manner. The other end of the rear connecting rod is slidably matched with the storage chute through a sliding pin. An articulated point for rotatably connecting with the front connecting rod is provided at the position of the rear connecting rod between the hinge platform and the positioning elbow. This design optimizes the movable connection structure between the connecting rods and between the crossbars. The hinge platform makes the hinge point between the rear connecting rod and the front crossbar have a certain distance from the front crossbar. To adapt to the structure of the hinge platform, the rear connecting rod preferably has a certain fold angle, and one end of it is slidably connected to the rear crossbar through a sliding pin, facilitating the rear frame to be as close as possible to the front frame during folding.

[0015] As a preferred solution, a lever unlocking mechanism is provided at the position of the rear limit support plate. The lever unlocking mechanism includes a rotating shaft connected between the top positions of the two sides of the rear limit support plate. The rotating shaft is connected to the limit strut through a lever. The lever is connected to a handle shaft parallel to the rotating shaft at the other end. By pulling the handle shaft, the lever is driven to rotate around the rotating shaft to toggle the limit strut to disengage it from the positioning boss position. To optimize the folding design of the frame and make the folding and unfolding operations easier to achieve, this design is provided. The unlocking mechanism is rotatably connected to the top of the rear limit support plate. By pulling the handle shaft, the limit strut can be driven to rotate around the rotating shaft, thus realizing convenient and fast unlocking or locking operations.

[0016] As a preferred solution, the end of the control pull rope away from the locking pin is connected to the limit support rod, and is used to synchronously unlock the positions of the front limit support plate and the rear limit support plate through the lever unlocking mechanism. Since there are folding structures between the front frame and the front control rod assembly, and between the front frame and the rear frame of the folding bike in this design, and both folding structures have limit structures that can be unlocked by moving, and the structure of connecting the pull rope with the limit support rod in this design can achieve synchronous unlocking at both places, that is, one action can unlock the positions at both places. It should be noted that the control pull rope is a rigid rope.

[0017] As a preferred solution, the seat assembly includes two groups of front support beams and rear support beams that are rotationally cross-connected in the middle. The top of the front support beam and the rear support beam is rotationally connected with a seat support plate. The bottom ends of the front support beams are all rotationally connected to the top of the rear limit support plate through the rotating shafts. The bottom ends of the rear support beams are connected to the corresponding side sliding pins and slide synchronously with the ends of the rear connecting rods. This design provides a preferred folding and storage design for the seat assembly above the frame. The overall structure is two groups of cross-connected support beams, and a seat plate rotationally connected to the top of the support beams. Through such a structure, when complete folding is required, the seat above the frame can be made to be as close to the bottom frame as possible, reducing the storage and folding volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of an electric folding bike provided by the present invention in the unfolded state;

[0019] Figure 2 is Figure 1 a schematic diagram of the internal structure of the electric folding bike in ;

[0020] Figure 3 is Figure 2 a partial schematic diagram of the front wheel position of the electric folding bike in ;

[0021] Figure 4 is Figure 3 a schematic diagram of the internal structure of the front wheel position of the electric folding bike in ;

[0022] Figure 5 is Figure 2 a schematic diagram of the folding transfer mechanism of the electric folding bike in ;

[0023] Figure 6 is Figure 5 a schematic diagram of the internal structure of the folding transfer mechanism in ;

[0024] Figure 7 is Figure 5 a schematic diagram of the structure of the other side of the folding transfer mechanism in ;

[0025] Figure 8 isFigure 2 Structural schematic diagram of the electric folding bike in the semi-folded state;

[0026] Figure 9 is Figure 1 Structural schematic diagram of the electric folding bike in the fully-folded state;

[0027] Among them, Figures 1 - 9 in:

[0028] 1. Seat assembly; 1-1. Front support beam; 1-2. Rear support beam; 2. Front control rod assembly; 3. Front frame; 3-1. Front wheel frame; 3-2. Front cross bar; 3-3. Front connecting rod; 3-4. Front limit support plate; 3-5. Movable locking mechanism; 3-6. Lock pin; 3-7. Hinge platform; 3-8. Positioning notch; 4. Rear frame; 4-1. Rear cross bar; 4-2. Rear connecting rod; 4-3. Storage chute; 4-4. Sliding pin; 5-1. Positioning elbow; 5-2. Rear limit support plate; 5-4. Rotating shaft; 5-5. Lever; 5-6. Handle shaft; 5-7. Limit strut; 5-8. Limit block structure. Detailed implementation manners

[0029] The technical solutions of the present utility model will be described clearly and completely below. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Refer to Figure 1 ,- Figure 9 to illustrate the following embodiments, Figure 1 is the overall structural schematic diagram of an electric folding bike provided by the present utility model in the unfolded state; Figure 2 is Figure 1 the internal structural schematic diagram of the electric folding bike in Figure 3 is Figure 2 the partial structural schematic diagram of the front wheel position of the electric folding bike in Figure 4 is Figure 3 the internal structural schematic diagram of the front wheel position of the electric folding bike in Figure 5 is Figure 2 the structural schematic diagram of the folding transfer mechanism of the electric folding bike in Figure 6 is Figure 5 the internal structural schematic diagram of the folding transfer mechanism in Figure 7 is Figure 5 the structural schematic diagram of the other side of the folding transfer mechanism in Figure 8 is Figure 2 the structural schematic diagram of the electric folding bike in the semi-folded state; Figure 9 is Figure 1Structural schematic diagram of the electric folding bike in the fully folded state.

[0031] The electric folding bike provided in this embodiment includes a chassis assembly, a seat assembly 1, and a front control rod assembly 2. The chassis assembly includes a front frame 3 and a rear frame 4 that are foldably connected. The front frame 3 includes a front wheel frame 3-1 for mounting the front wheel, a front cross bar 3-2 rotatably connected to both ends of the front wheel frame 3-1, and a front pedal supported by the top of the front cross bar 3-2. The front wheel frame 3-1 is vertically and positionally connected to the front control rod assembly. The end of the front wheel frame 3-1 is fixedly connected with a front limit support plate 3-4. A positioning notch 3-8 is provided on the side of the front limit support plate 3-4 facing the rear frame 4. An active locking mechanism 3-5 is provided at the end of the front cross bar 3-2. The active locking mechanism 3-5 includes a lock frame fixedly installed on the front cross bar 3-2 and a lock pin 3-6 movably connected to the lock frame. Through the limit cooperation of the lock pin 3-6 in the extended state with the positioning notch 3-8, the relative angle between the front cross bar 3-2 and the front wheel frame 3-1 is locked when the front cross bar 3-2 is perpendicular to the front control rod assembly 2.

[0032] The electric folding bike provided by the present utility model adopts a design in which the bottom plate can be folded in half. The front frame 3 at the front part of the chassis assembly includes a front wheel frame 3-1 that connects the wheel and the front control rod assembly 2. The front wheel frame 3-1 is rotatably connected to the front cross bar 3-2 of the front frame 3, so as to realize the rotational folding and storage of the control rod relative to the chassis. A front limit support plate 3-4 is provided at the folding connection position. A positioning notch 3-8 is provided on the side edge of this structure. The end of the front cross bar 3-2 is rotatably connected to the front limit support plate 3-4. An active locking mechanism 3-5 is provided at the position of the end of the front cross bar 3-2 that cooperates with the positioning notch 3-8. Through the extendable lock pin 3-6 structure therein, it can form a concave-convex locking cooperation with the positioning notch 3-8, so as to fix the angle between the front cross bar 3-2 and the front wheel frame 3-1, or rather, with the front control rod assembly 2. This rotational folding and locking structure can first ensure that the front control rod assembly 2 can rotate and fold relative to the front frame 3 to a smaller included angle, so as to achieve a good folding and storage effect. On this basis, through the cooperation between the positioning notch 3-8 and the lock pin 3-6, a good positioning effect can be achieved in the vehicle body unfolded state, and this positioning structure can be unlocked conveniently to quickly realize unlocking and storage, effectively solving the technical problems that the folding design of the existing electric folding bike has structural defects, resulting in a still relatively large occupied storage space and difficult folding operation.

[0033] As a preferred solution, one end of the lock frame is pin-connected with the front limit support plate 3-4, and the lock frame is also provided with a slide groove structure for accommodating the sliding of the lock pin 3-6. The lock pin 3-6 is T-shaped and both ends are transversely accommodated in the slide groove structure. The tail end of the lock pin 3-6 is connected with a control pull rope, which is used to pull the lock pin 3-6 to unlock it through the control pull rope. This design optimizes the structure of the movable lock mechanism 3-5, wherein the lock frame is provided with a slide groove structure for guiding the lock pin 3-6, and the lock pin 3-6 adopts a T-shaped structure to ensure the effect. The lateral part of the lock pin 3-6 can adapt to the slide groove structure, and has a certain lateral width to facilitate stable matching with the slide groove structure, and can ensure stable support with the positioning notch 3-8 of the front limit support plate 3-4. The tail end of the T-shaped lock pin 3-6 is connected with a control pull rope, which can conveniently drive the lock pin 3-6 to unlock from the positioning notch 3-8 through a pulling action, further simplifying the folding storage and unlocking operations.

[0034] In the technical solution of this embodiment, the front frame 3 also includes a front connecting rod 3-3 arranged in parallel with the front cross bar 3-2, one end of the front connecting rod 3-3 is hinged to the preset spacing position below the positioning notch 3-8 of the front limit support plate 3-4, and the other end of the front connecting rod 3-3 is used for rotational connection with the rear frame 4. This design optimizes the overall design of the front frame 3. In addition to a pair of front cross bars 3-2 constituting the overall frame, a front connecting rod 3-3 is arranged at the position of each front cross bar 3-2. The structure of the front connecting rod 3-3 assists in supporting the connection, as well as rotating and folding for storage. Since the front cross bar 3-2 and the front connecting rod 3-3 are respectively hinged to the front limit support plate 3-4 at different positions, a good folding effect can be achieved during rotational folding.

[0035] In the technical solution of this embodiment, the rear frame 4 includes a pair of rear cross bars 4-1 parallel to the front cross bar 3-2 in the unfolded state, and the end of the rear cross bar 4-1 is rotatably connected to the corresponding side front cross bar 3-2 through a folding switching mechanism. The rear frame 4 also includes a pair of rear connecting rods 4-2, one end of the rear connecting rod 4-2 is slidably connected to the corresponding side rear frame 4, and the other end is rotatably connected to the corresponding side front cross bar 3-2 and front connecting rod 3-3. This design optimizes the switching matching structure between the front frame 3 and the rear frame 4. The rear frame 4 is also supported by two rear cross bars 4-1 as a whole. One end of the rear connecting rod 4-2 is hinged to the front cross bar 3-2 and the other end is slidably matched with the rear cross bar 4-1 to provide sliding freedom when folding and storing.

[0036] In the technical solution of this embodiment, the folding adapter mechanism includes a positioning elbow 5-1 fixedly connected to the end of the front crossbar 3-2, and further includes a rear limit support plate 5-2 fixedly connected to the end of the rear crossbar 4-1; a limit strut 5-7 is slidably connected to the rear limit support plate 5-2, and a positioning boss is provided on the upper part of the positioning elbow 5-1 for abutting against the limit strut 5-7 to position the rear frame 4 in a posture parallel to the front frame 3. This design optimizes the adapter structure between the front frame 3 and the rear frame 4. The positioning elbow 5-1 and the rear limit support plate 5-2 are respectively arranged at the docking positions of the front crossbar 3-2 and the rear crossbar 4-1. Through the concave-convex limit cooperation of these two structures, the relative angle between the front frame 3 and the rear frame 4 can be positioned at a flat angle position, so as to ensure that the chassis assembly can be well fixed in the fully opened state.

[0037] In the technical solution of this embodiment, the rear limit support plate 5-2 has a double-plate structure with a slot in the middle. The front end of the positioning elbow 5-1 is received in the slot of the rear limit support plate 5-2. A thickened limit block structure 5-8 is provided at the base of the positioning elbow 5-1. The edge of the limit block structure 5-8 is in shape fit and abuts against the edge of the rear limit support plate 5-2 to position the rear frame 4 in a posture parallel to the front frame 3. This design optimizes the structures of the rear limit support plate 5-2 and the cooperating positioning elbow 5-1 that cooperate with each other. The overall structure of the rear limit support plate 5-2 is a double-plate structure with a slot in the middle. The positioning elbow 5-1 is in the shape of a plate and can just be received in the slot in the middle of the rear limit support plate 5-2. The thickness of the base of the positioning elbow 5-1 is increased, so that when the positioning elbow 5-1 rotates to the limit angle of the limit strut 5-7, concave-convex limits are formed at the side edges of the positioning elbow 5-1 and the rear limit support plate 5-2, increasing the area of the limit support and avoiding stress concentration, making the structure more durable.

[0038] In the technical solution of this embodiment, a protruding hinge platform 3-7 is provided at a preset distance from the end of the front crossbar 3-2 and the positioning elbow 5-1. One end of the rear connecting rod 4-2 is hinged to the hinge platform 3-7. A receiving chute 4-3 is integrally fixed to the upper side of the rear frame 4. The other end of the rear connecting rod 4-2 is slidably matched with the receiving chute 4-3 through a sliding pin 4-4. The rear connecting rod 4-2 is provided with a hinge point for rotatably connecting with the front connecting rod 3-3 at the position between the hinge platform 3-7 and the positioning elbow 5-1. This design optimizes the movable connection structure between the connecting rods and between the crossbars. Through the structure of the hinge platform 3-7, there is a certain distance between the hinge point of the rear connecting rod 4-2 and the front crossbar 3-2. To adapt to the structure of the hinge platform 3-7, the rear connecting rod 4-2 preferably has a certain fold angle, and one end of it is slidably connected to the rear crossbar 4-1 through a sliding pin 4-4, which is convenient for the rear frame 4 to be as close as possible to the front frame 3 when folding.

[0039] In the technical solution of this embodiment, there is a lever unlocking mechanism at the position of the rear limit support plate 5-2. The lever unlocking mechanism includes a rotating shaft 5-4 connected between the top positions of the rear limit support plates 5-2 on both sides. The rotating shaft 5-4 is connected to the limit support rod 5-7 through a lever 5-5. The lever 5-5 is connected to a handle shaft 5-6 parallel to the rotating shaft 5-4 at the other end. By pulling the handle shaft 5-6, the lever 5-5 is driven to rotate around the rotating shaft 5-4 to toggle the limit support rod 5-7 to disengage it from the positioning boss position. To optimize the folding design of the frame and make the folding and unfolding operations easier to achieve, the unlocking mechanism is rotatably connected to the top of the rear limit support plate 5-2. By pulling the handle shaft 5-6, the limit support rod 5-7 can be driven to rotate around the rotating shaft 5-4, thus realizing convenient and fast unlocking or locking operations.

[0040] In the technical solution of this embodiment, the end of the control cable away from the lock pin 3-6 is connected to the limit support rod 5-7, which is used to synchronously unlock the positions of the front limit support plate 3-4 and the rear limit support plate 5-2 by pulling the unlocking mechanism. Since there are folding structures between the front frame 3 and the front control rod assembly 2 and between the front frame 3 and the rear frame 4 of the folding bike of this design, and both folding structures have movable unlocking limit structures, and the structure of this design that the control cable is connected to the limit support rod 5-7 can achieve synchronous unlocking at two places, that is, one action can unlock the positions at two places. It should be noted that the control cable is a rigid cable.

[0041] In the technical solution of this embodiment, the seat assembly 1 includes two groups of front support beams 1-1 and rear support beams 1-2 that are rotationally crossed and connected in the middle. The top of the front support beam 1-1 and the rear support beam 1-2 are rotationally connected to a seat support plate. The bottom ends of the front support beams 1-1 are all rotationally connected to the top of the rear limit support plate 5-2 through a rotating shaft 5-4. The bottom ends of the rear support beams 1-2 are connected to the corresponding side sliding pins 4-4 and slide synchronously with the ends of the rear connecting rods 4-2. This design provides an optimized folding and storage design for the seat assembly 1 above the frame. The overall structure is two groups of mutually crossed support beams and a seat plate rotationally connected to the top of the support beams. Through such a structure, when it is necessary to completely fold, the seat above the frame can be made to be as close to the bottom frame as possible, reducing the storage and folding volume.

[0042] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. An electric folding vehicle, comprising a chassis assembly, a seat assembly (1) and a front joystick assembly (2), characterized in that: The chassis assembly comprises a front frame (3) and a rear frame (4) which are foldably connected, the front frame (3) comprising a front wheel frame (3-1) for mounting a front wheel, a front cross bar (3-2) rotatably connected to both ends of the front wheel frame (3-1), and a front pedal supported by the top of the front cross bar (3-2), the front wheel frame (3-1) being vertically positioned and connected to the front operating rod assembly, the end of the front wheel frame (3-1) being fixedly connected to a front limit support plate (3-4), the front limit support plate (3-4) being arranged to move toward the rear frame (4) A positioning notch (3-8) is provided on one side of the front cross bar (3-2), and a movable locking mechanism (3-5) is provided at the end of the front cross bar (3-2). The movable locking mechanism (3-5) comprises a locking frame fixedly mounted on the front cross bar (3-2) and a locking pin (3-6) movably connected to the locking frame. The locking pin (3-6) is limitedly matched with the positioning notch (3-8) in an extended state to lock the relative angle between the front cross bar (3-2) and the front wheel frame (3-1) when the front cross bar (3-2) is perpendicular to the front operating lever assembly (2).

2. The electric folding vehicle according to claim 1, characterized in that: One end of the lock frame is pin-connected to the front limit support plate (3-4); the lock frame is also provided with a slide groove structure for accommodating the sliding of the lock pin (3-6); the lock pin (3-6) is T-shaped with both ends transversely accommodated in the slide groove structure; the tail end of the lock pin (3-6) is connected to a control pull rope for pulling the lock pin (3-6) through the control pull rope to unlock the lock.

3. The electric folding vehicle according to claim 2, characterized in that: The front frame (3) further comprises front connecting rods (3-3) respectively arranged in parallel with the front cross bars (3-2), one end of the front connecting rod (3-3) being hinged to a preset spacing position below a positioning notch (3-8) of the front limit support plate (3-4), and the other end of the front connecting rod (3-3) being used for rotationally connecting to the rear frame (4).

4. The electric folding vehicle according to claim 3, characterized in that: The rear frame (4) comprises a pair of rear cross bars (4-1) which are parallel to the front cross bars (3-2) in an unfolded state, and the ends of the rear cross bars (4-1) are rotatably connected to the front cross bars (3-2) on the corresponding sides via a folding switching mechanism. The rear frame (4) also comprises a pair of rear connecting rods (4-2), one end of the rear connecting rod (4-2) is slidably connected to the rear frame (4) on the corresponding side, and the other end is rotatably connected to the front cross bar (3-2) and the front connecting rod (3-3) on the corresponding side.

5. The electric folding vehicle according to claim 4, characterized in that: The folding switching mechanism comprises a positioning elbow (5-1) fixedly connected to the end of the front crossbar (3-2), and also comprises a rear limit support plate (5-2) fixedly connected to the end of the rear crossbar (4-1); the rear limit support plate (5-2) is slidably connected to the limit support rod (5-7), and a positioning boss is provided on the upper part of the positioning elbow (5-1) for abutting against the limit support rod (5-7) to position the rear frame (4) in a posture parallel to the front frame (3).

6. The electric folding vehicle according to claim 5, characterized in that: The rear limit support plate (5-2) is a double plate structure with a slot in the middle, the front end of the positioning elbow (5-1) is accommodated in the slot of the rear limit support plate (5-2), the base of the positioning elbow (5-1) is provided with a thickened limit block structure (5-8), the edge of the limit block structure (5-8) and the edge of the rear limit support plate (5-2) are matched and abutted against each other to position the rear frame (4) in a posture parallel to the front frame (3).

7. The electric folding vehicle according to claim 5 or 6, characterized in that: A raised hinge platform (3-7) is provided at a preset distance between the end of the front crossbar (3-2) and the positioning elbow (5-1); one end of the rear connecting rod (4-2) is hinged to the hinge platform (3-7); an integrally fixed storage slide groove (4-3) is provided on the upper side surface of the rear frame (4); the other end of the rear connecting rod (4-2) is slidably matched with the storage slide groove (4-3) via a sliding pin (4-4); and a hinge point rotatably connected to the front connecting rod (3-3) is provided on the rear connecting rod (4-2) at a position between the hinge platform (3-7) and the positioning elbow (5-1).

8. The electric folding vehicle according to claim 7, characterized in that: The rear limit support plate (5-2) is provided with a toggle unlocking mechanism, the toggle unlocking mechanism comprising a rotating shaft (5-4) connected between the top positions of the rear limit support plates (5-2) on both sides, the rotating shaft (5-4) being connected to the limit support rod (5-7) via a lever (5-5), the lever (5-5) being connected at the other end with a handle shaft (5-6) parallel to the rotating shaft (5-4), and the lever (5-5) being driven to rotate around the rotating shaft (5-4) by levering the handle shaft (5-6) to lever the limit support rod (5-7) to disengage it from the positioning boss position.

9. The electric folding vehicle according to claim 8, characterized in that: The end of the control pull rope away from the locking pin (3-6) is connected to the limit support rod (5-7) and is used to synchronously unlock the positions of the front limit support plate (3-4) and the rear limit support plate (5-2) through the pull unlocking mechanism.

10. The electric folding vehicle according to claim 8, characterized in that: The seat assembly (1) comprises two groups of front support beams (1-1) and rear support beams (1-2) which are rotatably cross-connected in the middle, the tops of the front support beams (1-1) and the rear support beams (1-2) are rotatably connected to seat support plates, the bottom ends of the front support beams (1-1) are rotatably connected to the top of the rear limit support plate (5-2) via the rotating shaft (5-4), and the bottom ends of the rear support beams (1-2) are connected to the sliding pins (4-4) on the corresponding sides and slide synchronously with the end of the rear connecting rod (4-2).

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