阅读说明：本技术 一种电动滑板车的车架结构 (Frame structure of electric scooter ) 是由 杨玉峰 于 2019-11-15 设计创作，主要内容包括：本发明涉及一种电动滑板车的车架结构。包括车架组件以及脚踏板组件；车架组件包括前叉管、中管以及分位于两侧的、L形的两个侧管,中管的上端与前叉管固定,在中管的下端设有中管横梁,两个侧管的上端均与前叉管固定,在两个侧管的中部之间设有侧管中部横梁、末端之间设有侧管末端横梁,在侧管末端横梁上安装有后支架,还包括相对的两个后平叉,两者的前端分别与两个侧管的末端铰接连接,在两者的中前部之间设有平叉横梁,在后支架与平叉横梁之间安装有减震组件；脚踏板组件包括中部带有电池组件的脚踏板,在脚踏板的前部还设有后部敞口的脚控箱,在脚控箱内安装有传感器。本发明结构简单,为电动滑板车提供了额外的控制方式。(The invention relates to a frame structure of an electric scooter. Comprises a frame component and a pedal component; the frame assembly comprises a front fork tube, a middle tube and two L-shaped side tubes which are respectively positioned at two sides, wherein the upper end of the middle tube is fixed with the front fork tube, the lower end of the middle tube is provided with a middle tube cross beam, the upper ends of the two side tubes are both fixed with the front fork tube, a side tube middle cross beam is arranged between the middle parts of the two side tubes, a side tube tail end cross beam is arranged between the tail ends of the two side tubes, a rear support is arranged on the side tube tail end cross beam, the frame assembly also comprises two opposite rear bottom forks, the front ends of the two side tubes are respectively hinged with the tail ends of the two side tubes, a bottom fork cross beam is arranged between the middle front parts of the two side tubes, and a; the pedal component comprises a pedal with a battery component in the middle, a foot control box with an opening at the rear part is arranged at the front part of the pedal, and a sensor is arranged in the foot control box. The invention has simple structure and provides an additional control mode for the electric scooter.)

1. The utility model provides an electric scooter's frame structure, characterized by: comprises a frame assembly and a pedal assembly arranged on the frame assembly; the frame assembly comprises a front fork tube (1), a middle tube (3) and two L-shaped side tubes (2) which are respectively positioned at two sides, the upper end of the middle tube (3) is fixedly connected with the rear side wall of the front fork tube (1), a middle tube cross beam (3-1) is arranged at the lower end of the middle tube (3), two ends of the middle tube cross beam (3-1) are respectively fixedly connected with the two side tubes (2), the upper ends of the two side tubes (2) are fixedly connected with the front fork tube (1), a side tube middle cross beam (2-2) is arranged between the middle parts of the two side tubes (2), a side tube tail end cross beam (2-1) is arranged between the tail ends, a rear support (6) is arranged on the side tube tail end cross beam (2-1), the frame assembly further comprises two opposite rear flat forks (8), the front ends of the two side tubes are respectively hinged with the tail ends of the two side tubes (2), and a flat fork cross beam (8-1) is arranged between, a damping component (7) is arranged between the rear bracket (6) and the bottom fork cross beam (8-1); the pedal assembly comprises a pedal (4) with a battery assembly (9) in the middle, the main body of the pedal (4) is positioned between two side pipes (2), a foot control box (4-1) with an open rear is also arranged in the front of the pedal (4), and a sensor (4-2) is arranged in the foot control box (4-1).

2. The frame structure of an electric scooter according to claim 1, wherein: the main body part of the pedal plate (4) and the foot control box (4-1) are of an integral injection molding structure, a battery mounting groove is integrally formed in the middle of the pedal plate (4), and the battery component (9) is located in the battery mounting groove.

3. The frame structure of an electric scooter according to claim 2, wherein: the damping assembly (7) comprises a front backup plate (7-1) fixed with a cross beam (2-1) at the tail end of a side pipe and a rear backup plate (7-2) fixed with a bottom fork cross beam (8-1), rubber piers (7-3) are installed on the rear backup plate (7-2) through a plurality of fastening bolts (7-4), and the front side wall of each rubber pier (7-3) is abutted to the rear side wall of the front backup plate (7-1).

4. The frame structure of an electric scooter according to claim 3, wherein: the lower end of the front backup plate (7-1) is bent in an arc shape and sleeved on the front part of the cross beam (2-1) at the tail end of the side pipe and is welded and fixed, and the lower end of the rear backup plate (7-2) is bent in an arc shape and sleeved on the front part of the bottom fork cross beam (8-1) and is welded and fixed.

5. The frame structure of an electric scooter according to claim 4, wherein: the cross beam (2-1) at the tail end of the side pipe is of a hollow pipe structure, and two ends of the cross beam are respectively welded and fixed with the tail ends of the two side pipes (2); the tail ends of the two side pipes (2) are processed into a flat shape and provided with shaft holes, the front ends of the two rear bottom forks (8) are processed into a flat shape and provided with shaft holes, and long bolts penetrate through the shaft holes and the hollow pipes to realize hinged connection.

6. The frame structure of an electric scooter according to claim 5, wherein: the rear bracket (6) is in an inverted U shape, is made by bending the same metal pipe, and the end part of the rear bracket is welded and fixed with the end beam (2-1) of the side pipe; the main body part of the front backup plate (7-1) is positioned in the space at the inner side of the rear bracket (6), and the edges at two sides of the front backup plate (7-1) are respectively welded and fixed with the pipe bodies at two sides of the rear bracket (6).

7. The frame structure of an electric scooter according to claim 6, wherein: a protective bottom shell steel plate is further installed below the pedal plate (4), and the protective bottom shell steel plate extends forwards from the rear edge position of the bottom of the pedal plate (4) to the position in front of the top edge of the foot control box (4-1).

8. The frame structure of an electric scooter according to claim 7, wherein: and a battery lock (9-1) for locking the battery assembly (9) is also arranged between the pedal (4) and the battery assembly (9).

9. The frame structure of an electric scooter according to claim 8, wherein: a vehicle ladder (5) is arranged on the outer side of the middle rear part of one side tube (2).

10. The frame structure of an electric scooter according to claim 9, wherein: a box door (4-3) is arranged at the rear opening of the foot control box (4-1), when the foot part extends into the foot control box (4-1), the box door (4-3) is opened, and when the foot part leaves the foot control box (4-1), the box door (4-3) is closed.

Technical Field

The invention belongs to the technical field of electric scooter parts, and particularly relates to a frame structure of an electric scooter.

Background

With the progress of technology and the improvement of living standard of people, various deformed riding products based on the traditional bicycle are developed and gradually go into the daily life of people, and the bicycle brings convenience to people or people in various aspects such as riding commute, fitness and entertainment and the like. The electric scooter is a traffic tool which is popular in recent years and has strong interestingness, and is a traffic tool which is based on the traditional manpower scooter and is provided with an electric power suite. The current electric skateboard is generally divided into a double-wheel drive mode or a single-wheel drive mode, the most common transmission mode is a hub motor drive mode, and a main power source of the electric skateboard is a lithium battery pack.

When the electric scooter rides, a rider stands on the pedal plate, and the balance of the riding process is ensured through the coordination of limbs. Electric scooter's the operation control device such as acceleration, brake sets up on handlebar assembly usually, and is similar with traditional electric bicycle's configuration, sets up accelerator and brake at the tip of handlebar, rotates the accelerator through the wrist and makes wheel hub motor receive bigger electric current and produce bigger drive power, stirs the brake through the finger, operates the effect that produces the brake through the brake line pair dish brake mechanism of installing on the wheel.

From the above, the existing electric scooter only mobilizes the upper limbs of the rider, especially the hands of the rider in the aspect of the operation and control of the vehicle, and the mobilizing of the lower limbs of the rider is limited, which leads to the reduction of the interest of riding and the single control mode of the electric scooter. Considering the interest of riding and electric scooter's control factor, electric scooter should have more control modes, if need promote power with overtaking or climbing etc. fast when riding, carry out the brake control of other modes etc. when riding. The existing electric scooter frame structure does not provide the possibility for the control mode in the form of the above, namely, the current electric scooter frame structure can only meet the traditional function as a main frame, and the single function causes the interest and the poor controllability of the vehicle.

Disclosure of Invention

The frame structure of the electric scooter is simple in structure and provides an additional control mode to solve the technical problems in the prior art, and the interestingness and the controllability of riding the electric scooter are improved.

The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a frame structure of an electric scooter comprises a frame component and a pedal component arranged on the frame component; the frame assembly comprises a front fork tube, a middle tube and two L-shaped side tubes which are respectively positioned at two sides, the upper end of the middle tube is fixedly connected with the rear side wall of the front fork tube, a middle tube cross beam is arranged at the lower end of the middle tube, two ends of the middle tube cross beam are respectively fixedly connected with the two side tubes, the upper ends of the two side tubes are both fixedly connected with the front fork tube, a side tube middle cross beam is arranged between the middle parts of the two side tubes, a side tube end cross beam is arranged between the tail ends of the side tubes, a rear support is arranged on the side tube end cross beam, the frame assembly also comprises two opposite rear flat forks, the front ends of the middle tube and the rear flat forks are respectively hinged with the tail ends of the two side tubes, a flat fork cross beam is arranged between the middle front; the pedal assembly comprises a pedal with a battery assembly in the middle, the main body of the pedal is positioned between two side pipes, a foot control box with an open rear is also arranged in the front of the pedal, and a sensor is arranged in the foot control box.

The invention has the advantages and positive effects that: compared with the existing electric scooter frame, the frame structure of the electric scooter provided by the invention has the advantages that the damping component is arranged between the front part (a combined body formed by the front fork tube, the middle tube, the side tube and the pedal component) and the rear part (the rear flat fork) of the frame, so that the whole frame structure has a good damping effect, and the riding is more comfortable. Through the foot control box that is equipped with the uncovered and internally mounted of rear portion at the front portion of running-board and has the sensor, realized riding passerby's foot and stretched into the technical effect that the foot control incasement produced trigger signal through the sensor, electric scooter's controller is sent for by the trigger signal that ridees passerby foot to the aforesaid can regard as control signal's input source, thereby realizes corresponding control function. Compare with original control mode, above-mentioned foot control case provides extra control trigger mechanism for electric scooter, makes electric scooter's whole car control more diversified, consequently rides passerby's hand and foot and has all obtained the mobilizing, has promoted electric scooter's interest and nature controlled.

Preferably: the main body part of the pedal plate and the foot control box are of an integral injection molding structure, a battery mounting groove is integrally formed in the middle of the pedal plate, and the battery component is located in the battery mounting groove.

Preferably: the damping assembly comprises a front backup plate fixed with a cross beam at the tail end of the side pipe and a rear backup plate fixed with a cross beam of the bottom fork, rubber piers are installed on the rear backup plate through a plurality of fastening bolts, and the front side wall of each rubber pier is abutted against the rear side wall of the front backup plate.

Preferably: the lower end of the front backup plate is bent in an arc shape and sleeved on the front part of the cross beam at the tail end of the side tube and is welded and fixed, and the lower end of the rear backup plate is bent in an arc shape and sleeved on the front part of the bottom fork cross beam and is welded and fixed.

Preferably: the cross beam at the tail end of each side pipe is of a hollow pipe structure, and two ends of the cross beam are respectively welded and fixed with the tail ends of the two side pipes; the tail ends of the two side pipes are processed into a flat shape and are provided with shaft holes, the front ends of the two rear bottom forks are processed into a flat shape and are provided with shaft holes, and long bolts penetrate through the shaft holes and the hollow pipes to realize hinged connection.

Preferably: the rear bracket is in an inverted U shape, is made by bending the same metal pipe, and the end part of the rear bracket is welded and fixed with a cross beam at the tail end of the side pipe; the main body part of the front backup plate is positioned in the space at the inner side of the rear bracket, and the edges at two sides of the front backup plate are respectively welded and fixed with the pipe bodies at two sides of the rear bracket.

Preferably: and a protective bottom shell steel plate is further installed below the pedal plate, and the protective bottom shell steel plate extends forwards to the position in front of the top edge of the foot control box from the rear edge position of the bottom of the pedal plate.

Preferably: and a battery lock for locking the battery assembly is also arranged between the pedal plate and the battery assembly.

Preferably: and a vehicle ladder is arranged on the outer side of the middle rear part of one side pipe.

Preferably: the rear opening of the foot control box is provided with a box door, and the box door is opened when the foot part extends into the foot control box and is closed when the foot part leaves the foot control box.

Drawings

FIG. 1 is a schematic side view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view of the rear portion of the present invention, from an upper perspective;

FIG. 4 is a schematic view of the rear portion of the present invention, from a lower perspective;

FIG. 5 is a side cross-sectional structural schematic view of the present invention;

fig. 6 is a structural diagram illustrating the installation state of the present invention.

In the figure: 1. a front fork tube; 2. a side tube; 2-1, a cross beam at the tail end of the side pipe; 2-2, a cross beam in the middle of the side pipe; 3. a middle tube; 3-1, a middle pipe beam; 4. a foot pedal; 4-1, a foot control box; 4-2, a sensor; 4-3, a box door; 5. a vehicle ladder; 6. a rear bracket; 7. a shock absorbing assembly; 7-1, a front backup plate; 7-2, a rear backup plate; 7-3, rubber pier; 7-4, fastening bolts; 8. a rear bottom fork; 8-1, a bottom fork cross beam; 9. a battery assembly; 9-1, a battery lock; 10. a handlebar assembly; 11. a front fork assembly; 12. a folder; 13. a front fender; 14. a front wheel; 15. a rear fender; 16. a rear wheel; 17. reflection of light lamp plate.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail as follows:

referring to fig. 1, 2 and 5, the frame structure of the electric scooter of the present invention includes a frame assembly and a pedal assembly mounted on the frame assembly. The frame component is a framework made of metal profiles through welding processing, and the pedal plate component is installed and fixed on the frame component.

The frame component comprises a front fork tube 1, a middle tube 3 and two L-shaped side tubes 2 which are respectively positioned at two sides, the upper end of the middle tube 3 is fixedly connected with the rear side wall of the front fork tube 1, a middle tube cross beam 3-1 is arranged at the lower end of the middle tube 3, and two ends of the middle tube cross beam 3-1 are respectively fixedly connected with the two side tubes 2. The upper ends of the two side pipes 2 are fixedly connected with the front fork pipe 1, a side pipe middle cross beam 2-2 is arranged between the middle parts of the two side pipes 2, and a side pipe tail end cross beam 2-1 is arranged between the tail ends.

The combination body formed by the middle tube 3 and the middle tube cross beam 3-1 is positioned between the front parts of the two side tubes 2, and the upper end of the middle tube 3 is fixedly connected with the front fork tube 1, and the middle tube cross beam 3-1 is fixedly arranged between the two side tubes 2, so that the front part of the frame assembly is strengthened. The two side pipes 2 are respectively made of a whole steel pipe through bending and forming, as shown in fig. 1, the rear half parts of the two side pipes 2 are processed into arc shapes, namely the middle parts of the rear half parts are slightly upwards arc-shaped, so that the integral attractiveness is improved, and the local structural strength of the frame is improved to a certain extent. In addition, both the side tube middle cross member 2-2 and the side tube end cross member 2-1 provide reinforcement at the middle (the transition between the front and rear portions of the side tube 2) and the rear (the rear end portion of the side tube 2), further enhancing the overall structural strength of the frame assembly.

A vehicle ladder 5 is arranged on the outer side of the middle rear part of one side tube 2, and the vehicle ladder 5 is used for laterally supporting the electric scooter in a non-riding state.

Referring to fig. 3, 4 and 5, it can be seen that: the rear support 6 is mounted on a cross beam at the tail end of each side tube 2, the rear support further comprises two opposite rear bottom forks 8, the front ends of the rear support and the rear bottom forks are hinged to the tail ends of the two side tubes 2 respectively, a bottom fork cross beam 8-1 is arranged between the middle front parts of the rear support and the bottom fork cross beam 8-1, and a damping assembly 7 is mounted between the rear support 6 and the bottom fork cross beam 8-1.

In the embodiment, the cross beam 2-1 at the tail end of the side pipe is of a hollow pipe structure, and two ends of the cross beam are respectively welded and fixed with the tail ends of the two side pipes 2; the tail ends of the two side pipes 2 are processed into flat shapes and provided with shaft holes, two end parts of a cross beam 2-1 at the tail end of each side pipe are respectively welded and connected with the tail ends of the two side pipes 2, the front ends of the two rear bottom forks 8 are processed into flat shapes and provided with shaft holes, two ends of the cross beam 8-1 of each bottom fork are welded and fixed with the inner walls of the middle front parts of the two rear bottom forks 8, long bolts penetrate through the shaft holes and the hollow pipes to realize hinged connection, and the main body parts of the long bolts fall into the hollow pipes of the cross beams 2-1 at the tail ends of the side.

In the embodiment, the shock absorption assembly 7 comprises a front backup plate 7-1 fixed with the end beam 2-1 of the side pipe and a rear backup plate 7-2 fixed with the bottom fork beam 8-1, a rubber pier 7-3 is installed on the rear backup plate 7-2 through a plurality of fastening bolts 7-4, and the front side wall of the rubber pier 7-3 abuts against the rear side wall of the front backup plate 7-1. Therefore, when the assembly formed by the rear bottom fork 8 and the bottom fork cross beam 8-1 rotates in a tilting mode by taking the central line of the long bolt as a center, the rubber pier 7-3 of the damping assembly 7 is pressed to deform, a certain elastic buffering effect is generated, and the damping effect is achieved.

Specifically, the rear support 6 is in an inverted U shape, is made of the same metal pipe by bending, and is welded and fixed between the end part and the end beam 2-1 of the side pipe. In order to enhance the structural strength of the front backup plate 7-1 and prevent the front backup plate from being separated and broken in the repeated pressing and abutting process of the rubber pier 7-3, in the embodiment, the main body part of the front backup plate 7-1 is positioned in the space inside the rear bracket 6, and the two side edges of the front backup plate 7-1 are respectively welded and fixed with the pipe bodies on the two sides of the rear bracket 6, so that the front backup plate 7-1 and the rear bracket 6 form an integrated structure, and the pressing force generated by the rubber pier 7-3 is transmitted to the rear bracket 6.

Further, the lower end of the front backup plate 7-1 is bent in an arc shape and sleeved on the front portion of the cross beam 2-1 at the tail end of the side tube and is welded and fixed, and the lower end of the rear backup plate 7-2 is bent in an arc shape and sleeved on the front portion of the bottom fork cross beam 8-1 and is welded and fixed.

Referring to fig. 2, 3 and 5, it can be seen that: the pedal assembly comprises a pedal 4 with a battery assembly 9 in the middle, the main body of the pedal 4 is positioned between the two side pipes 2 (as shown in the figure, positioned between the rear parts of the two side pipes 2), a foot control box 4-1 with the rear part open is also arranged at the front part of the pedal 4, and a sensor 4-2 is arranged in the foot control box 4-1.

The footboard subassembly is installed on the frame subassembly, when riding passerby and carrying out electric scooter's the time of riding with the gesture of standing, the foot is stepped on the footboard subassembly. Therefore, sufficient connection strength is required between the pedal assembly and the frame assembly, necessary fasteners can be adopted to connect the pedal assembly and the frame assembly, for example, bolts, screws and the like are adopted to connect the fixing point position on the pedal assembly with the fixing point position on the frame assembly, and if necessary, a supporting mechanism for the pedal assembly, such as a supporting plate and the like, can be welded on the section bar of the frame assembly (such as the inner side wall of the side pipe 2, the middle cross beam 2-2 of the side pipe and the tail end cross beam 2-1 of the side pipe). In fact, the side tube middle cross beam 2-2, the side tube end cross beam 2-1 and the rear bracket 6 can sufficiently support the pedal assembly, and the pedal assembly is mounted on the frame assembly only by necessary fixed connection.

In this embodiment, the main body portion of the pedal 4 and the foot control box 4-1 are an integral injection molding structure, a battery mounting groove is integrally formed in the middle of the pedal 4, and the battery assembly 9 is located in the battery mounting groove. As shown in fig. 1, 2 and 5, the foot control box 4-1 is located below the middle tube 3 and the middle tube beam 3-1, and a decorative part can be obtained by integral injection molding or split injection molding above the foot control box 4-1, the decorative part is coated on the middle lower part of the middle tube 3 and the middle tube beam 3-1, the middle lower part of the assembly is sealed, and the decorative part plays a role in beauty.

Considering that injection moulding's running-board subassembly self structure is comparatively fragile, receives easy breakage under the effect that external force collided with when riding, consequently in this embodiment, still install protection drain pan steel sheet in the below of running-board 4, protection drain pan steel sheet extends to the position in the top edge the place ahead of foot control box 4-1 forward from the rear portion border position of running-board bottom, and protection drain pan steel sheet adopts fixings such as bolt and frame subassembly fixed connection.

Battery pack 9 includes outside casing and is located electric core and the circuit board of casing, is equipped with connecting terminal on the casing, and relevant position in the battery mounting groove also is equipped with connecting terminal, and after battery pack 9 was put into the battery mounting groove like this, both connecting terminal switch-on, battery pack 9 had just realized the electricity through lead line and electric scooter's controller and has been connected. The battery pack 9 is mounted in the battery mounting groove and is fused with the footboard 4, thus constituting a part of the footboard 4. Because battery pack 9 is located the position that the passerby stepped on, consequently battery pack 9's casing should possess sufficient structural strength, and whole can adopt the aluminum alloy preparation, and the crushing resistance is good. Meanwhile, the battery pack 9 is arranged in the middle of the pedal 4, and the left and right legs of a rider are separated in the riding process, so that the feet do not fall on the battery pack 9 completely, but fall on the left and right sides of the battery pack 9, and the rider cannot tread on the battery pack 9 all the time. Of course, according to the riding habits of different riders, the feet of the riders can stand front and back.

The surface at the position of the surface of running-board 4, battery pack 9 both sides can integrative injection moulding have anti-skidding line, and battery pack 9's the interface that charges can set up the lateral part position at running-board 4, is convenient for be connected with the charging wire.

Still install the battery lock that is used for locking battery pack 9 between running-board 4 and battery pack 9, battery pack 9 can take off after need adopting the key unblock, guarantees battery pack 9's theftproof effect.

The rear part of a foot control box 4-1 arranged at the rear part of a pedal plate 4 is in an open state, so that the feet of a rider can extend forwards into the foot control box 4-1, an internal sensor 4-2 is used for detecting whether the feet of the rider are placed in the foot control box, when the feet are detected to be placed in the foot control box, a trigger signal is generated and sent to a controller of the electric scooter through a lead wire, after the controller receives the signal, the output of a control instruction is carried out according to an internal preset control logic, for example, the instruction can be that a hub motor receives larger driving current so as to generate larger torque, so that under the scenes of overtaking or climbing and the like, the electric scooter can obtain larger driving force more quickly, and the promotion of the driving force cannot be realized through a speed control device on a handlebar.

Of course, what kind of instruction is output after the controller receives the signal that the foot of the rider is put into the foot control box 4-1 and is sent by the sensor 4-2 depends on the control rule preset in the electric scooter controller, and the feasibility is provided by setting the foot control box 4-1 and the sensor 4-2 to order the control rule to be compiled by the frame structure.

The sensor 4-2 can be selected from various types of sensors which are commercially available and can detect that the feet of the rider enter the inner space of the foot control box 4-1, such as an infrared pair tube sensor, an ultrasonic sensor and the like, and can also be a contact switch type sensor, and after the feet are placed in the sensor, the sensor is triggered in a non-contact or contact mode to generate signals. Correspondingly, according to the principle and the structural form of the sensors with different types, the installation mode and the installation position of the sensor 4-2 in the foot control box 4-1 can be different, for example, a contact switch type sensor can be installed at the bottom of the inner cavity of the foot control box 4-1, an ultrasonic sensor can be installed at the top of the inner cavity of the foot control box 4-1, and the like.

In the embodiment, in order to provide certain protection for the space inside the foot control box 4-1 and provide certain feedback action for the feet of a rider, the box door 4-3 is installed at the rear opening of the foot control box 4-1, when the feet extend into the foot control box 4-1, the box door 4-3 is opened, and when the feet leave the foot control box 4-1, the box door 4-3 is closed. The box door 4-3 can completely cover the opening at the rear part of the foot control box 4-1, and can also cover the position of the middle lower part, and in the aspect of the opening mode, the box door can be inclined or split.

It should be noted that, in the process of inserting the foot after the door 4-3 is installed, the door 4-3 is pressed by the foot to open, and is closed automatically after the foot leaves, so that the generation of the trigger signal of the sensor 4-2 should not be influenced in the process of opening and closing the door 4-3. Specifically, the box door 4-3 may include a door plate, the door plate is hinged to the bottom edge of the rear opening of the foot control box 4-1 and is provided with a torsion spring for providing a return elastic force, and the size of the door plate is preferably not to be involved in the detection range of the sensor 4-2 during the opening and closing process, so as to prevent the sensor 4-2 from generating a false triggering signal.

When the rider rides the bicycle, when the feet of the rider move forwards and touch the box door 4-3 firstly, the box door 4-3 is opened under the action of external force, and the feet continue to move forwards to reach the detection area of the sensor 4-2, a trigger signal is generated; when the foot part is withdrawn, the foot part is withdrawn firstly from the detection area of the sensor 4-2 and then is separated from the box door 4-3, and the box door 4-3 is restored to the original position under the action of the elastic force of the self-reset torsion spring. In the process, the box door 4-3 provides a certain feedback effect for the feet of the rider, the rider does not need to look down and can know the progress of foot control operation through body touch, and the safety is improved. In addition, the box door 4-3 in the closed state in the non-use state effectively avoids the false triggering caused by the entering of foreign matters.

A front fork assembly 11 is arranged on the front fork tube 1, and a folder 12 is arranged in the middle of the front fork assembly 11, so that the front fork assembly 11 and accessory parts thereof can be folded; a handlebar assembly 10 is installed at the top of the front fork assembly 11, and a front wheel 14 and a front mudguard 13 are installed at the bottom of the front fork assembly 11; the rear wheel 16 is arranged between the two rear bottom forks 18, a rear mudguard 15 is also arranged between the two rear bottom forks 18, and reflector lamp panels 17 are arranged on the front mudguard 13 and the rear mudguard 15; one of the front wheel 14 and the rear wheel 16 is provided with an in-wheel motor as a driving wheel.