Balance bike

Abstract

The present invention discloses a self-balancing scooter, belonging to the technical field of self-balancing scooters. The self-balancing scooter includes a support frame and two wheels, the axles of the two wheels being fixed at both ends of the support frame. The self-balancing scooter includes a pedal member, the self-balancing scooter having a footrest area, the footrest area being completely located on the pedal member; the pedal member is swingable relative to the support frame and can float up and down. When a user is using the self-balancing scooter normally, the area where the user's foot contacts the scooter is the footrest area, and the footrest area is completely located on the floating pedal member, avoiding the presence of two relatively movable parts in the footrest area and improving the integrity of the footrest area.

Description

Technical Field

[0001] The invention belongs to the technical field of balancing vehicles and relates to a floating integrated balancing vehicle. Background Art

[0002] Existing self-balancing vehicles primarily include integrated self-balancing vehicles and twist-and-turn self-balancing vehicles. Twist-and-turn self-balancing vehicles consist of a first and second body that are arranged to rotate relative to each other, with two wheels mounted on each of the first and second bodies, or the two bodies are mounted rotatably relative to each other on a common shaft, with the two wheels fixed to either end of the shaft. Integrated self-balancing vehicles, on the other hand, consist of a non-rotatable support frame, with two wheels fixed to the frame. The frame is equipped with pedals that can rotate relative to the frame, and the swinging of the pedals controls the vehicle's forward movement or turns.

[0003] Existing twist-and-turn balancing scooters include a sensor pedal and a sensor switch. The sensor pedal is mounted on the upper cover of the main body and floats relative to the upper cover. When a user steps on the sensor pedal, it sinks and triggers the sensor switch, allowing the controller to determine that the user is standing on the scooter and control the scooter to enter a balanced state. The scooter is not in a balanced state before the sensor switch is triggered. The pedals on existing integrated scooters can only rotate relative to the support frame, but cannot float up and down relative to the support frame, making them unsuitable for detecting whether a user is standing on the scooter. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art and proposes a balancing vehicle, the purpose of which is to overcome the defect that the pedals of the existing integrated balancing vehicle are not easy to be arranged in a floating manner.

[0005] The present invention is achieved in that:

[0006] A balancing vehicle comprises a support frame and two wheels, wherein the axles of the two wheels are fixed at both ends of the support frame, and is characterized in that:

[0007] The balancing vehicle includes a pedal member, which has a pedal area. The pedal area is completely located on the pedal member; the pedal member is swingable relative to the support frame and can float up and down.

[0008] When the user is using the balance bike normally, the area where the user's foot contacts the balance bike is the pedal area. The pedal area falls completely on the pedal member that floats up and down, avoiding the presence of two relatively moving parts in the pedal area and improving the integrity of the pedal area. If there are two relatively moving parts in the pedal area, there will be a gap between the two parts. In this case, an elastic rubber pad must be used to cover the gap to prevent foreign matter from entering. By placing the pedal area completely on the pedal member, the pedal area corresponding to the pedal member does not need to have relatively moving parts, avoiding the generation of moving gaps, and reducing the use of rubber pads. The material selection corresponding to the pedal area is more extensive. The pedal area can be made entirely of the same hard material, or a non-slip mat can be laid on the surface of the hard material.

[0009] Preferably, the first end of the tread member is rotatably mounted on the support frame, and the second end of the tread member is floating and rotatably mounted on the support frame. The second end is floating, while the first end is non-floating. This reduces the movable dimensions of the first end, improves the overall stability of the tread member, and can also reduce the corresponding floating structure of the first end, simplifying the structure.

[0010] Preferably, the balancing vehicle includes a swinging member rotatably mounted on the axle of the wheel; the treading member is fixedly connected to the swinging member in the swinging direction, and the treading member is floatably mounted on the swinging member. This simplifies the overall structure of the floatable component and facilitates increased flexibility in the up and down floating of the treading member.

[0011] Preferably, a return member is provided between the treading member and the swinging member, or a return member is provided between the treading member and the support frame, and the return member can automatically return the treading member upward.

[0012] Preferably, the swinging member includes a mounting member, on which an angle sensing unit is provided. The mounting member has a first mounting hole, through which the wheel axle passes. The user's foot controls the swinging of the pedal member, which in turn drives the swinging member. The angle sensor, which can be a gyroscope or a variable resistor, is capable of detecting angle changes of the swinging member to cooperate with the controller to control the movement of the balancing vehicle. Connecting the mounting member to the wheel axle eliminates the need for an additional corresponding rotating shaft on the support frame, simplifying the structure and reducing costs.

[0013] Preferably, the swing member includes a limit member detachably fixed to the mounting member. When the treading member is in the lower limit position, the second end of the treading member abuts the limit member, so that the treading member drives the swing member to swing. The mounting member and the limit member can be made of different materials, for example, the mounting member is made of plastic and the limit member is made of metal. The limit member can provide more stable support for the treading member, and the swinging of the treading member can be more reliably transmitted to the swing member.

[0014] Preferably, the limiting member has a second mounting hole, the wheel axle passes through the second mounting hole, and the limiting member is detachably fixed to the mounting member. In this way, the pressure of the pedal member on the limiting member can be borne by the wheel axle, reducing the impact of the pressure on the mounting member.

[0015] Preferably, the mounting member has an upwardly extending baffle with a vertically extending strip hole formed thereon, and a guide post is provided at the second end of the tread member, the guide post being embedded in the strip hole. The strip hole can limit the front and rear positions of the tread member, thereby improving the stability of the second end of the tread member.

[0016] Preferably, the treadle is provided with a trigger portion extending downward, the mounting member is provided with a clearance hole, the mounting member is located below the support frame, the mounting member is provided with a controller, the controller is provided with a sensor switch, and the trigger portion passes through the clearance hole and corresponds to the sensor switch. When the treadle moves downward, the trigger portion moves downward, the sensor switch detects the trigger portion and transmits a signal to the controller, so that the controller can obtain information that the user is standing on the treadle, thereby controlling the balancing vehicle to enter a balanced state.

[0017] Preferably, the baffle is provided with a mudguard, a bottom box is provided under the support frame, the bottom box has a accommodating cavity with an upward opening, the mounting part and the controller are located in the accommodating cavity, and the middle part of the support frame is provided with a battery box, the inner cavity of the battery box and the accommodating cavity are independent of each other; this can prevent the heat generated by the battery in the battery box from affecting the controller, which is beneficial to reducing the temperature of the controller and facilitating better performance of the controller.

[0018] Preferably, the support frame comprises a first square tube and a second square tube, with a fixing plate disposed between the ends of the first and second square tubes. A pressure plate is detachably fixed to the fixing plate, and the wheel axle is clamped and secured to the support frame by the fixing plate and the pressure plate. Square tubes are strong, universal components with low cost. The two square tubes, combined with the fixing plates, form the main structure of the support frame, ensuring the strength of the support frame while reducing material consumption and contributing to the lightweighting of the balancing vehicle. The square tubes facilitate a stable connection with the pressure plate, preventing relative rotation.

[0019] Preferably, the mounting member has a first protrusion and a second protrusion that protrude upward, the first protrusion and the second protrusion have the first mounting hole, and the fixing plate is located between the first protrusion and the second protrusion; in this way, the mounting member can be limited on the wheel axle without the need for an additional limiting structure, while improving the stability of the connection between the mounting member and the wheel axle.

[0020] Preferably, a hinged beam is provided between the middle parts of the first square tube and the second square tube, and the first end of the treading member is hinged on the hinged beam; the hinged beam can strengthen the connection strength of the middle area of ​​the first square tube and the second square tube, thereby facilitating the connection of the treading member.

[0021] Preferably, the first square tube and / or the second square tube are hollow, and a wiring channel passing through the first square tube and / or the second square tube is provided between the battery box and the controller; this can reduce the exposure of wires, reduce the wire protection structure, and simplify the overall structure of the balance vehicle.

[0022] Preferably, the treadle comprises a detachably connected trigger member and a pedal, wherein the trigger member has a trigger portion. In this way, the trigger member and the pedal can be made of different materials. For example, the trigger member can be made of plastic to facilitate processing of a more complex structure such as the trigger portion, while the pedal can be made of metal to reduce the risk of deformation of the treadle and improve overall strength.

[0023] The balance bike provided by the present invention has the following features: when the user uses the balance bike normally, the area where the user's feet touch the balance bike is the pedal area, and the pedal area is completely on the pedal member that floats up and down, avoiding the presence of two relatively moving parts in the pedal area and improving the integrity of the pedal area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of a balance car;

[0025] Figure 2 This is a schematic diagram of the partial explosion structure of the balance car;

[0026] Figure 3 It is a structural diagram of the trigger;

[0027] Figure 4 Schematic diagram of the structure of the pedal;

[0028] Figure 5 This is a schematic diagram of the first partial structure of the balancing vehicle;

[0029] Figure 6 It is a structural diagram of the installation parts;

[0030] Figure 7 This is a schematic diagram of the second partial structure of the balancing vehicle;

[0031] Figure 8 It is a structural diagram of the limiting component;

[0032] Figure 9 Schematic diagram of the structure of the square tube.

[0033] Explanation of the accompanying drawings: 100, support frame; 110, first square tube; 120, second square tube; 130, fixing plate; 140, pressure plate; 150, hinged beam; 200, wheel; 210, axle; 300, pedal; 310, footrest area; 320, return member; 330, trigger member; 331, guide column; 332, trigger part; 340, pedal; 341, swing part; 400, swing member; 410, mounting member; 411, first mounting hole; 412, slot; 413, strip hole; 414, clearance hole; 415, controller; 416, induction switch; 417, first protrusion; 418, second protrusion; 420, limit member; 421, second mounting hole; 430, baffle; 440, mudguard; 500, bottom box; 600, battery box. DETAILED DESCRIPTION

[0034] The following will further describe the specific embodiments of the present invention in conjunction with the accompanying drawings to make the technical solution of the present invention easier to understand and grasp. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] like Figure 1-2 As shown, this embodiment provides a balance vehicle including a support frame 100 and two wheels 200, wherein the axles 210 of the two wheels 200 are fixed at both ends of the support frame 100, and the balance vehicle includes a pedal member 300, and the balance vehicle has a pedal area 310, and the pedal area 310 is completely located on the pedal member 300; the pedal member 300 can swing relative to the support frame 100 and can be floated up and down.

[0036] When the user uses the balance bike normally, the area where the user's sole contacts the balance bike is the footrest area 310. The footrest area 310 falls completely on the tread member 300 that floats up and down, avoiding the presence of two relatively movable parts in the footrest area 310 and improving the integrity of the footrest area 310. If there are two relatively movable parts in the footrest area 310, there will be a gap between the two parts. In this case, an elastic rubber pad must be used to cover the gap to prevent foreign matter from entering. The footrest area 310 is completely placed on the tread member 300. The footrest area 310 corresponding to the tread member 300 does not need to be provided with relatively movable parts, thus avoiding the generation of movable gaps and reducing the use of rubber pads. The material selection corresponding to the footrest area 310 is more extensive. The footrest area 310 can be made entirely of the same hard material, or a non-slip mat can be laid on the surface of the hard material. The two end structures of the balance bike are symmetrical, and this embodiment is mainly described with respect to one end.

[0037] like Figure 1-4As shown, the first end of the tread member 300 is rotatably mounted on the support frame 100, while the second end of the tread member 300 is floating and rotatably mounted on the support frame 100. The second end is floating, while the first end is non-floating. This reduces the movable dimensions of the first end, improves the overall stability of the tread member 300, and reduces the corresponding floating structure of the first end, simplifying the structure. In other optional embodiments, the first and second ends of the tread member 300 can be simultaneously floating relative to the support frame 100.

[0038] like Figure 2-6 As shown, the balancing vehicle includes a swing member 400, which is rotatably mounted on the axle 210 of the wheel 200. This eliminates the need for a dedicated component on the support frame 100 for rotatably mounting the swing member 400. In other optional embodiments, the swing member 400 may also be rotatably mounted on the support frame 100.

[0039] Furthermore, the tread member 300 and the swing member 400 are fixedly connected in a forward and backward swinging direction, and the tread member 300 is disposed in a floating manner on the swing member 400. This simplifies the overall structure of the floating component and facilitates improving the flexibility of the tread member 300 in floating up and down motion. In other optional embodiments, the tread member 300 can also be directly disposed on the support frame 100, allowing the tread member 300 to both swing and float relative to the support frame 100.

[0040] like Figure 5 As shown, a return member 320 is provided between the tread member 300 and the swing member 400. The return member 320 is a spring. The elastic force of the spring causes the tread member 300 to move upward. When the user leaves the tread member 300, the elastic force of the spring causes the tread member 300 to return upward. In other optional embodiments, the return member 320 can also be provided between the tread member 300 and the support frame 100.

[0041] like Figure 2 、 Figure 5-6As shown, the swing member 400 includes a mounting member 410, on which an angle sensing unit is provided. The mounting member 410 has a first mounting hole 411, and the wheel axle 210 passes through the first mounting hole 411. The user's foot controls the swing of the pedal 300, driving the swing member 400 to swing. The angle sensor can be a gyroscope or a variable resistor, which can detect the angle change of the swing member 400 to cooperate with the controller 415 to control the movement of the balance vehicle. By connecting the mounting member 410 to the wheel axle 210, there is no need to additionally set a corresponding rotating shaft on the support frame 100, which simplifies the structure and reduces costs. The angle sensing unit can be set independently of the controller 415 and electrically connected to the controller 415, or it can be integrated into the controller 415. When the angle sensing unit is independent of the controller 415, the controller 415 can be fixed to the support frame 100 and not swing along with the tread member 300. When the angle sensing unit is integrated into the controller 415, the controller 415 can be installed on the tread member 300 or the swing member 400 so that the angle sensing unit can swing along with the tread member 300. The controller 415 can control the operation of the balancing vehicle according to the swing angle of the tread member 340 detected by the angle sensing unit.

[0042] like Figure 5 、 7 As shown in Figures 8 and 9, the swing member 400 includes a limit member 420 that is detachably fixed to the mounting member 410. When the tread member 300 is in the lower limit position, the second end of the tread member 300 abuts against the limit member 420, so that the tread member 300 drives the swing member 400 to swing. When a user steps on the tread member 300, the tread member 300 moves downward until it abuts against the limit member 420. The limit member 420 has a limit surface that contacts the tread member 300. When the user's foot controls the tread member 300 to swing, the tread member 300 can drive the swing member 400 to swing through the limit member 420. The mounting member 410 and the limiting member 420 can be made of different materials, for example, the mounting member 410 can be made of plastic and the limiting member 420 can be made of metal. The limiting member 420 can provide more stable support for the tread member 300, and the swinging motion of the tread member 300 can be more reliably transmitted to the swinging member 400. In other optional embodiments, the limiting member 420 and the tread member 300 can also be in line contact or multi-point contact, as long as the two do not rotate relative to each other in the swinging direction of the tread member 300.

[0043] like Figure 8As shown, the stopper 420 has a second mounting hole 421, through which the axle 210 passes. The stopper 420 is detachably secured to the mounting member 410. When the tread 300 is made of metal and the mounting member 410 is made of plastic, the pressure exerted by the tread 300 on the stopper 420 can be borne by the axle 210, reducing the impact of the pressure on the mounting member 410. In other optional embodiments, the stopper 420 can also be integrally connected to the mounting member 410.

[0044] like Figure 6 、 Figure 8 As shown, the mounting member 410 has a slot 412, and the limiting member 420 is inserted into the slot 412 and fixedly connected by screws. In other optional embodiments, the mounting member 410 and the limiting member 420 can also be snap-fitted, or the limiting member 420 can be simply inserted into the slot 412 without being fixed by screws. The corresponding connecting parts of the slot 412 and the limiting member 420 can also be made square to achieve the function of transmitting the swing force.

[0045] like Figure 2 、 Figure 6 As shown, the mounting member 410 has an upwardly extending baffle 430 with a vertically extending strip hole 413 formed therein. The second end of the tread member 300 is provided with a guide post 331, which is embedded in the strip hole 413. The strip hole 413 can limit the front and rear positions of the tread member 300, thereby improving the stability of the second end of the tread member 300. The baffle 430 has a pair of strip holes 413 distributed front and back, and a pair of guide posts 331 are correspondingly provided at the second end of the tread member 300. The cooperation between the guide posts 331 and the strip holes 413 can also play a role in transmitting the swinging direction of the tread member 300 and the mounting member 410, and can serve as an alternative to providing the limit member 420.

[0046] like Figure 3-5As shown, the treadle 300 is provided with a downwardly extending trigger portion 332, and the mounting member 410 is provided with a clearance hole 414. The mounting member 410 is located below the support frame 100, meaning that a portion of the mounting member 410 is located directly below the support frame 100. The mounting member 410 is provided with a controller 415, which is equipped with a sensor switch 416. The trigger portion 332 passes through the clearance hole 414 and corresponds to the sensor switch 416. When the treadle 300 moves downward, the trigger portion 332 moves downward. The sensor switch 416 detects the trigger portion 332 and transmits a signal to the controller 415, allowing the controller 415 to detect that the user is standing on the treadle 300 and control the balancing vehicle to enter a balanced state. In this embodiment, the sensor switch 416 is a photoelectric sensor. In other alternative embodiments, the sensor switch 416 can also be a micro switch or a pressure sensor. The induction switch 416 may also be provided on the upper surface of the limiting member 420 . When the pedal member 300 is pressed down onto the induction switch 416 on the upper surface of the limiting member 420 , it can be determined that the pedal member 300 is in the stepped state.

[0047] like Figure 1 、 2 As shown in Figures 6 and 7, the baffle 430 is provided with a mudguard 440. A bottom box 500 is provided below the support frame 100. The bottom box 500 has a storage cavity with an upward opening. The mounting member 410 and the controller 415 are located in the storage cavity. A battery box 600 is provided in the middle of the support frame 100. The inner cavity of the battery box 600 and the storage cavity are independent of each other. This prevents the heat generated by the batteries in the battery box 600 from affecting the controller 415, helps reduce the temperature of the controller 415, and facilitates better performance of the controller 415. In other optional embodiments, the mudguard 440 can also be provided independently of the baffle 430 and the mounting member 410. For example, the mudguard 440 can be fixed separately to the support frame 100.

[0048] Two bottom boxes 500 are fixed to the two ends of the support frame 100. Each of the two bottom boxes 500 corresponds to a controller 415, and the two controllers 415 control the two wheels 200. In other optional embodiments, a single bottom box 500 and a single controller 415 can control both wheels 200, with the battery box 600 and bottom box 500 respectively placed at the two ends of the support frame 100. In other optional embodiments, the bottom box 500 can be fixed to the support frame 100 via a bottom cover, the bottom cover being of the same length as the support frame 100.

[0049] like Figure 1 、 2As shown in Figures 9 and 9, the support frame 100 includes a first square tube 110 and a second square tube 120. A fixing plate 130 is provided between the ends of the first square tube 110 and the second square tube 120. A pressure plate 140 is detachably fixed to the fixing plate 130. The wheel axle 210 is clamped and fixed to the support frame 100 by the fixing plate 130 and the pressure plate 140. Square tubes are strong general-purpose parts with low cost. The two square tubes are combined with the fixing plate 130 to form the main structure of the support frame 100, which ensures the strength of the support frame 100 while reducing the material consumption and is also conducive to the lightweighting of the balance vehicle. The square tube is conducive to stable connection with the pressure plate 140 and is not prone to relative rotation. In other optional embodiments, the support frame 100 may also include a round tube, or the support frame 100 may be a plate-shaped structural member or a frame-shaped structural member.

[0050] like Figure 6 As shown, the mounting member 410 has an upwardly projecting first protrusion 417 and a second protrusion 418, each of which has a first mounting hole 411. The fixing plate 130 is located between the first protrusion 417 and the second protrusion 418. This allows the mounting member 410 to be positioned on the axle 210 without requiring an additional retaining structure, while also improving the stability of the connection between the mounting member 410 and the axle 210. In other optional embodiments, the mounting member 410 may also be connected to the axle 210 via a retaining spring, a pin, or other structures.

[0051] like Figure 2 As shown, a hinged beam 150 is provided between the middle portions of the first square tube 110 and the second square tube 120, and the first end portion of the tread member 300 is hingedly connected to the hinged beam 150. The hinged beam 150 can strengthen the connection strength between the middle regions of the first square tube 110 and the second square tube 120, thereby facilitating the connection of the tread member 300. As the second end portion of the tread member 300 floats up and down, it drives the first end portion to swing, and the first end portion of the tread member 300 can be left with room for left and right swinging during assembly. For example, a swinging portion 341 is provided on the first end portion, and the swinging portion 341 is rotatably mounted on the hinged beam 150 via a hinge shaft to enable the tread member 300 to swing back and forth. The swinging portion and the first end portion are hingedly connected, allowing the tread member 300 to swing left and right relative to the swinging portion, or a gap is provided between the swinging portion and the hinge shaft to allow left and right swinging.

[0052] like Figure 9 As shown, the first square tube 110 and / or the second square tube 120 are hollow, and a wiring channel passing through the first square tube 110 and / or the second square tube 120 is provided between the battery box 600 and the controller 415; this can reduce the exposure of wires, reduce the wire protection structure, and simplify the overall structure of the balance vehicle.

[0053] The treadle 300 includes a detachably connected trigger member 330 and a pedal 340. The trigger member 330 has a trigger portion 332. The trigger member 330 and the pedal 340 can be made of different materials. For example, the trigger member 330 can be made of plastic to facilitate the processing of more complex structures such as the trigger portion 332, while the pedal 340 can be made of metal to reduce the risk of deformation of the treadle 300 and improve its overall strength. The entire treading area is preferably located on the pedal 340. In this embodiment, the treadle is a detachable component. In other optional embodiments, the treadle can also be a single piece.

Claims

1. A balancing vehicle, comprising a support frame (100) and two wheels (200), wherein the axles (210) of the two wheels (200) are fixed to the two ends of the support frame (100), characterized in that: The balancing vehicle comprises a pedal member (300), and the balancing vehicle has a pedal area (310), and the pedal area (310) is completely located on the balancing vehicle (300); the balancing vehicle (300) is swingable relative to the support frame (100) and can be floated up and down; The first end of the treading member (300) is rotatably disposed on the support frame (100), and the second end of the treading member (300) is floatingly and rotatably disposed on the support frame (100); The balancing vehicle comprises a swinging member (400), wherein the swinging member (400) is rotatably arranged on the wheel axle (210) of the wheel (200); the treading member (300) and the swinging member (400) are fixedly connected in the swinging direction, and the treading member (300) is floatably arranged on the swinging member (400); The swinging member (400) includes a mounting member (410), an angle sensing unit is provided on the mounting member (410), a first mounting hole (411) is provided on the mounting member (410), and the wheel axle (210) passes through the first mounting hole (411); The mounting member (410) has an upwardly extending baffle (430), the baffle (430) has a vertically extending strip hole (413), and the second end of the treading member (300) is provided with a guide column (331), and the guide column (331) is embedded in the strip hole (413); The treading member (300) is provided with a trigger portion (332) extending downward, the mounting member (410) is provided with a clearance hole (414), the mounting member (410) is located below the support frame (100), the mounting member (410) is provided with a controller (415), the controller (415) is provided with a sensor switch (416), and the trigger portion (332) passes through the clearance hole (414) and corresponds to the sensor switch (416).

2. The balancing vehicle according to claim 1, characterized in that: A return member (320) is provided between the treading member (300) and the swinging member (400); or a return member (320) is provided between the treading member (300) and the support frame (100).

3. The balancing vehicle according to claim 1, characterized in that: The swing member (400) includes a limiting member (420) detachably fixed to the mounting member (410); when the treading member (300) is at the lower limit position, the second end of the treading member (300) abuts against the limiting member (420) so that the treading member (300) drives the swing member (400) to swing.

4. The balancing vehicle according to claim 3, characterized in that: The limiting member (420) has a second mounting hole (421), the wheel axle (210) passes through the second mounting hole (421), and the limiting member (420) is detachably fixed to the mounting member (410).

5. The balancing vehicle according to claim 1, characterized in that: A fender (440) is provided on the baffle (430), a bottom box (500) is provided below the support frame (100), the bottom box (500) having an upwardly opening accommodating cavity, the mounting member (410) and the controller (415) being located in the accommodating cavity, a battery box (600) being provided in the middle of the support frame (100), the inner cavity of the battery box (600) and the accommodating cavity being independent of each other; The support frame (100) comprises a first square tube (110) and a second square tube (120); a fixing plate (130) is provided between the ends of the first square tube (110) and the second square tube (120); a pressing plate (140) is detachably fixed to the fixing plate (130); and the wheel axle (210) is clamped and fixed to the support frame (100) by the fixing plate (130) and the pressing plate (140); The mounting member (410) has a first protruding portion (417) and a second protruding portion (418) protruding upward, the first protruding portion (417) and the second protruding portion (418) have the first mounting hole (411), and the fixing plate (130) is located between the first protruding portion (417) and the second protruding portion (418); A hinged beam (150) is provided between the middle portions of the first square tube (110) and the second square tube (120), and a first end portion of the treading member (300) is hingedly connected to the hinged beam (150); The first square tube (110) and / or the second square tube (120) are hollow, and a wiring channel passing through the first square tube (110) and / or the second square tube (120) is provided between the battery box (600) and the controller (415); The treading member (300) comprises a detachably connected trigger member (330) and a pedal (340), wherein the trigger member (330) is provided with a trigger portion (332).

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