CN212267721U - Portable electric balance car - Google Patents

Abstract

The utility model discloses a light electrodynamic balance car belongs to balance car technical field, and aim at overcomes the great, the laborious defect of transport of current electrodynamic balance car weight. A first rotating seat is arranged between the inner end part of a first upper cover and the inner end part of a first lower cover of the balance car, a second rotating seat is arranged between the inner end part of a second upper cover and the inner end part of a second lower cover, the first rotating seat and the second rotating seat are made of metal, rotating assemblies are mounted on the first rotating seat and the second rotating seat to enable the first upper cover and the second upper cover to be connected in a rotating mode, a fixing piece made of metal is arranged between the outer end part of the upper cover and the outer end part of the lower cover, and an axle of a wheel is fixed on the fixing piece. The utility model provides a light electrodynamic balance car has reduced the whole weight of balance car under the condition that satisfies the lighter user of weight and bear the weight demand, has improved the portability of balance car, is favorable to the transport operation, and the less crowd of the strength of being convenient for uses.

Description

Portable electric balance car

Technical Field

The utility model belongs to the technical field of balance car, a light electrodynamic balance car is related to.

Background

The existing electric balance car generally adopts a three-layer structure consisting of a top cover, an inner cover and a bottom cover, is designed for adults with large weight, and has strong bearing capacity. Chinese patent literature discloses "an improvement electrodynamic balance car", and the grant bulletin number is CN204699363U, and it includes top cap, bottom and inner cup three layer construction, and wherein top cap and bottom are plastics, and the inner cup is the aluminum alloy, and the inner cup setting is between top cap and bottom, and the slewing mechanism and the balance car both ends wheel in the middle part all install in the aluminum alloy on covering in the balance car, and the inner cup spanes on the automobile body of whole balance car for electrodynamic balance car's whole structure is more firm, has stronger bearing capacity.

There are a large amount of ms and children that the weight is lighter among the balance car user, need not too strong bearing capacity to the user that the weight is lighter, the three layer construction of above-mentioned balance car makes the whole weight of balance car great, and the volume is great, and occupation space is many, and power consumption is more during the operation, influences the duration, and the power is little the person comparatively takes effort when the balance car is moved to needs, be not convenient for ms and children move the balance car when running into the step in the use balance car in-process, also be not convenient for ms and children get on vapour car trunk and put the balance car.

Disclosure of Invention

The utility model discloses the problem to prior art existence provides a light electrodynamic balance car, and aim at overcomes the defect that current electrodynamic balance car weight is great, power consumptive more influences duration, transport are arduous.

The utility model discloses a realize like this:

a portable electric balance car comprises an upper cover and a lower cover, wherein wheels are arranged at two ends of the upper cover and the lower cover, the upper cover and the lower cover are made of plastics, the upper cover comprises a first upper cover and a second upper cover, the lower cover comprises a first lower cover and a second lower cover, it is characterized in that a first rotating seat is arranged between the inner end part of the first upper cover and the inner end part of the first lower cover, a second rotating seat is arranged between the inner end part of the second upper cover and the inner end part of the second lower cover, the first rotating seat and the second rotating seat are made of metal, rotating assemblies are mounted on the first rotating seat and the second rotating seat, so that the first upper cover and the first lower cover are respectively and rotatably connected with the second upper cover and the second lower cover, metal fixing pieces are arranged between the outer end portions of the upper cover and the lower cover, and an axle of the wheel is fixed on the fixing pieces. The metal that is used for installing rotating assembly in the interior tip setting of first upper cover and second upper cover rotates the seat, the outer tip setting of upper cover is used for installing the metal mounting of wheel, cancel and span in axletree and rotating assembly's inner cup, make not have the metallic structure who transversely runs through in the balance car automobile body between upper cover and the lower cover that plastics were made, satisfy the weight and reduced the whole weight of balance car under the condition that the lighter user bore the weight demand, the portability of balance car has been improved, be favorable to reducing power consumption and just be convenient for the transport operation with improving duration, the less crowd of strength of being convenient for uses.

Preferably, the rotating assembly comprises a rotating shaft, a first end of the rotating shaft is fixed on the first rotating seat, and a second end of the rotating shaft is mounted on the second rotating seat through a bearing; or, the rotating assembly comprises a rotating shaft, and two ends of the rotating shaft are respectively installed on the first rotating seat and the second rotating seat through bearings. The pivot makes first upper cover and second upper cover can rotate relatively, and the gyroscope in the balance car can detect the rotational position of first upper cover and second upper cover and give the controller with signal transmission, and the controller can be according to the information control wheel rotational speed and the direction of rotation of gyroscope, realizes controlling such as going back, advancing, accelerating, slowing down, the turn of balance car. The single-end rotating structure can improve the strength and facilitate batch assembly; the double-end rotating structure can improve the rotation flexibility.

Preferably, the first rotating seat and the second rotating seat both include a connecting portion having an inner cavity, the connecting portion extends to both sides to form a fixing portion, the fixing portions of the first rotating seat and the second rotating seat are fixed to the first upper cover and the second upper cover respectively by screws, and both end portions of the rotating shaft are installed in the inner cavities of the connecting portions of the first rotating seat and the second rotating seat respectively. The fixed part is convenient for rotate the seat and is fixed to the upper cover, and the inner chamber of connecting portion is convenient for install the pivot and makes the pivot rotate in the inner chamber.

Preferably, the first upper cover and the second upper cover are both provided with limiting columns, the fixing part is provided with limiting holes, and the limiting columns are inserted into the limiting holes. The cooperation of spacing post and spacing hole is convenient for rotate the seat and is fixed a position the upper cover fast for the hole site between upper cover and the rotation seat can be quick, stable counterpoint, the screw in operation of the screw of being convenient for.

Preferably, the limiting column is provided with a threaded hole, the first lower cover and the second lower cover are respectively provided with a fixing hole corresponding to the threaded hole, and the inner ends of the first lower cover and the second lower cover are respectively fixed on the inner ends of the first upper cover and the second upper cover through screws which penetrate through the fixing holes and are screwed into the threaded holes. Therefore, the limiting column plays a role in limiting the rotating seat and also plays a role in fixing the lower cover, and the balancing vehicle has two purposes due to the fact that one column is used, and the internal structure of the balancing vehicle is more compact.

Preferably, the inner end portions of the first upper cover and the second upper cover are provided with upper reinforcing ribs, the upper reinforcing ribs surround to form upper mounting grooves, the first rotating seat and the second rotating seat are respectively partially embedded into the corresponding upper mounting grooves, and the upper reinforcing ribs abut against the fixing portions. The structure of upper cover can be strengthened to the strengthening rib, and the strengthening rib encloses into the mounting groove and is used for the installation to rotate the seat and make the strengthening rib can form the restraint to rotating the seat, makes the installation that rotates the seat more stable, also is favorable to rotating the quick location of seat.

Preferably, the inner ends of the first lower cover and the second lower cover are provided with fixing columns, the fixing holes are located on the fixing columns, the end portions of the fixing columns are provided with sinking grooves, and the limiting columns protrude downwards from the upper reinforcing ribs and are inserted into the sinking grooves. The limit column is inserted into the sinking groove, so that the lower cover and the upper cover can be conveniently positioned, and the screwing operation of the fixing screw is facilitated.

Preferably, the first lower cover and the second lower cover are both provided with lower reinforcing ribs corresponding to the upper reinforcing ribs, the lower reinforcing ribs surround a lower mounting groove corresponding to the upper mounting groove, and the first rotating seat and the second rotating seat are partially embedded into the corresponding lower mounting grooves respectively. The structure of lower cover can be strengthened to the strengthening rib, and the strengthening rib encloses into down the mounting groove and is used for the installation to rotate the seat and make the strengthening rib can form the restraint to rotating the seat, makes the installation of rotating the seat more stable, and when the installation lower cover, it has fixed at the upper cover to rotate the seat, rotates the quick location that the mounting groove is favorable to rotating the seat under the seat embedding this moment.

Preferably, the fixing member includes an upper pressing plate and a lower pressing plate, the upper pressing plate and the lower pressing plate clamp the axle to fix the axle, the upper pressing plate is provided with a convex pillar protruding downwards, the lower pressing plate is provided with a mounting hole, the convex pillar is embedded into the mounting hole, and a screw passes through the mounting hole and the convex pillar and is screwed into the upper cover to fix the upper pressing plate and the lower pressing plate together at the outer end of the upper cover. Thus, the wheels are detachably fixed to the two end parts of the upper cover and the lower cover, and the two metal pieces clamp the axle together, so that the wheels are more firmly installed.

Preferably, first upper cover with it has pedal region to cover on the second, pedal region has contact hole and spacing through-hole, pedal regional upper surface sets up the contact board, it passes to have the contact post on the contact board the contact hole, wear to establish the locating part that can reciprocate in the through-hole on the spacing through-hole, the upper end of locating part with contact board fixed connection, the lower extreme of locating part sets up spacing cap, the diameter of spacing cap is greater than the diameter of spacing through-hole, first upper cover with set up the piece that returns between the contact board of second upper cover with corresponding. When a user steps on the balance car, the contact plate can be pressed by feet, the contact plate overcomes the elastic force of the return piece and moves downwards, so that the contact column triggers the balance switch to start the balance car and keep balance, the user leaves the balance car, the contact plate moves upwards under the action of the return piece, the contact column returns, the limiting cap is abutted to the lower end edge of the limiting through hole to avoid the contact plate from moving upwards excessively, the balance switch is disconnected to close the balance car, and therefore when the user steps on the balance car by one foot, the balance car cannot be in disorder, the use safety of the balance car is improved, and the control of a novice is facilitated.

The utility model provides a light electrodynamic balance car, only the metal that is used for installing the runner assembly in the interior tip setting of the first upper cover of plastics and second upper cover rotates the seat, the outer tip setting of upper cover is used for installing the metal mounting of wheel, do not have the metallic structure who transversely runs through in the balance car automobile body, the whole weight of balance car has been reduced under the condition that satisfies the lighter user of weight and bear the weight demand, the portability of balance car has been improved, be favorable to reducing power consumption, the time of endurance is prolonged, the transport operation of being convenient for, the less crowd of the strength of being convenient for uses.

Drawings

FIG. 1 is a schematic overall structure diagram of a balance car;

FIG. 2 is a schematic diagram of an exploded structure of the balance car;

FIG. 3 is a schematic view of a first angular configuration of the upper cover;

FIG. 4 is a second angular configuration of the upper cover;

FIG. 5 is a schematic structural view of the lower cover;

FIG. 6 is a schematic structural view of the assembled rotary seat and rotary shaft;

FIG. 7 is a schematic left side view of the structure of FIG. 6;

FIG. 8 is a schematic structural view of the upper platen;

FIG. 9 is a schematic view of a first angular configuration of the lower platen;

FIG. 10 is a second angular configuration of the lower platen.

Reference is made to the accompanying drawings in which: 110. a first upper cover; 120. a second upper cover; 130. a limiting column; 131. a threaded hole; 140. arranging a reinforcing rib; 141. mounting a mounting groove; 150. a pedaling zone; 151. a contact hole; 152. a limiting through hole; 160. a contact plate; 161. a contact post; 170. silica gel is used for treading; 210. a first lower cover; 220. a second lower cover; 230. a fixing hole; 240. fixing a column; 241. sinking a groove; 242. a set screw; 250. a lower reinforcing rib; 251. a lower mounting groove; 300. a wheel; 310. an axle; 410. a first rotating base; 420. a second rotating base; 430. a connecting portion; 431. an inner cavity; 440. a fixed part; 441. a limiting hole; 500. a fixing member; 510. an upper pressure plate; 511. a convex column; 520. a lower pressing plate; 521. mounting holes; 600. a rotating shaft; 700. a battery; 710. a fixing plate; 800. and a controller.

Detailed Description

The following detailed description is made of specific embodiments of the present invention with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The embodiment provides a portable electric balance car, as shown in fig. 1-5, which includes an upper cover and a lower cover, wheels 300 are disposed at two ends of the upper cover and the lower cover, a wheel hub motor is disposed on the wheels 300, the upper cover and the lower cover are made of plastic, the upper cover includes a first upper cover 110 and a second upper cover 120, the lower cover includes a first lower cover 210 and a second lower cover 220, a first rotating seat 410 is disposed between an inner end of the first upper cover 110 and an inner end of the first lower cover 210, a second rotating seat 420 is disposed between an inner end of the second upper cover 120 and an inner end of the second lower cover 220, the first rotating seat 410 and the second rotating seat 420 are made of metal, a rotating assembly is mounted on the first rotating seat 410 and the second rotating seat 420 to rotatably connect the first upper cover 110 and the second upper cover 120, a metal fixing member 500 is disposed between the outer end of the upper cover and the outer end of the lower cover, and an axle fixing member 310 of the wheels 300 is fixed on the metal fixing member 500. The metal rotating seats used for mounting the rotating assemblies are arranged at the inner ends of the first upper cover 110 and the second upper cover 120, the metal fixing pieces 500 used for mounting the wheels 300 are arranged at the outer ends of the upper covers, and the inner covers crossing over the axles 310 and the rotating assemblies are omitted, so that metal structural members transversely penetrating through the body of the balance car are not arranged between the upper covers and the lower covers made of plastics, the overall weight of the balance car is reduced under the condition that the bearing requirement of a light user is met, the portability of the balance car is improved, the carrying operation is facilitated, and the use of people with small strength is facilitated.

The rotating assembly comprises a rotating shaft 600, a first end part of the rotating shaft 600 is fixed on the first rotating seat 410, a second end part of the rotating shaft 600 is installed on the second rotating seat 420 through a bearing, a limit pin shaft is arranged between the first rotating seat 410 and the second rotating seat 420, one end of the limit pin shaft is fixed on the first rotating seat 410, the inner end of the second rotating seat 420 is provided with an arc-shaped groove, the other end of the limit pin shaft is embedded into the arc-shaped groove to limit the relative rotating angle of the first rotating seat 410 and the second rotating seat 420, so as to limit the relative rotating angle of the first upper cover 110 and the second upper cover 120, the limit pin shaft at the moment is parallel to the axis of the bobbin, and the rotating shaft 600 is axially limited on the first rotating seat 410 and the second rotating seat 420 through a clamp spring. In other alternative embodiments, the limiting pin shaft may also be disposed perpendicular to the axis of the rotating shaft 600, one end of the limiting pin shaft is fixed on the rotating shaft 600, the second rotating seat 420 has a strip-shaped hole, and the limiting pin shaft penetrates through the strip-shaped hole and can limit the movement in the strip-shaped hole to limit the relative rotation angle of the first rotating seat 410 and the second rotating seat 420. In addition, in other alternative embodiments, both end portions of the rotating shaft 600 are respectively mounted on the first rotating base 410 and the second rotating base 420 through bearings.

As shown in fig. 6 to 7, each of the first rotating base 410 and the second rotating base 420 includes a connecting portion 430 having an inner cavity 431, the connecting portion 430 extends to both sides to form a fixing portion 440, the fixing portions 440 of the first rotating base 410 and the second rotating base 420 are fixed to the first upper cover 110 and the second upper cover 120 by screws, respectively, and both end portions of the rotating shaft 600 are installed in the inner cavities 431 of the connecting portions 430 of the first rotating base 410 and the second rotating base 420, respectively. As shown in fig. 4 and 6, the first upper cover 110 and the second upper cover 120 both have a position-limiting post 130 thereon, the fixing portion 440 has a position-limiting hole 441 thereon, and the position-limiting post 130 is inserted into the position-limiting hole 441. The cooperation of spacing post 130 and spacing hole 441 is convenient for rotate the seat and is fixed a position on the upper cover fast for the hole site between upper cover and the rotation seat can be quick, stable counterpoint, the screw in operation of the screw of being convenient for.

As shown in fig. 4 to 5, the limiting column 130 has a threaded hole 131, the first lower cover 210 and the second lower cover 220 each have a fixing hole 230 corresponding to the threaded hole 131, and inner ends of the first lower cover 210 and the second lower cover 220 are fixed to inner ends of the first upper cover 110 and the second upper cover 120, respectively, by screws passing through the fixing holes 230 and screwed into the threaded holes 131. Therefore, the limiting column 130 plays a role of limiting the rotating seat and also plays a role of fixing the lower cover, and the balance car has two purposes by one column, so that the internal structure of the balance car is more compact.

As shown in fig. 4, the inner ends of the first upper cover 110 and the second upper cover 120 are provided with upper reinforcing ribs 140, the upper reinforcing ribs 140 define upper mounting grooves 141, the first rotating base 410 and the second rotating base 420 are partially inserted into the corresponding upper mounting grooves 141, respectively, and the upper reinforcing ribs 140 abut against the fixing portions 440. Go up the structure that the upper cover can be strengthened to strengthening rib 140, go up strengthening rib 140 and enclose into mounting groove 141 and be used for the installation to rotate the seat and make last strengthening rib 140 can form the restraint to rotating the seat, make the installation that rotates the seat more stable, also be favorable to rotating the quick location of seat.

As shown in fig. 5, the inner ends of the first lower cover 210 and the second lower cover 220 are provided with fixing posts 240, the fixing holes 230 are located on the fixing posts 240, the end of the fixing post 240 is provided with a sinking groove 241, and the limiting post 130 protrudes downwards from the upper reinforcing rib 140 and is inserted into the sinking groove 241. The insertion of the position-limiting post 130 into the sinking groove 241 facilitates the positioning between the lower cover and the upper cover, and facilitates the screwing operation of the fixing screw 242. The first lower cover 210 and the second lower cover 220 are provided with lower reinforcing ribs 250 disposed corresponding to the upper reinforcing ribs 140, the lower reinforcing ribs 250 surround lower mounting grooves 251 corresponding to the upper mounting grooves 141, and the first rotating base 410 and the second rotating base 420 are partially inserted into the corresponding lower mounting grooves 251, respectively. Lower strengthening rib 250 can strengthen the structure of lower cover, and lower strengthening rib 250 encloses into down mounting groove 251 and is used for the installation to rotate the seat and make strengthening rib 250 can form the restraint down to rotating the seat, makes the installation of rotating the seat more stable, and during the installation lower cover, it has fixed on the upper cover to rotate the seat, rotates the seat embedding this moment and is favorable to rotating the quick location of seat mounting groove 251 down.

As shown in fig. 8-10, the fixing member 500 includes an upper pressing plate 510 and a lower pressing plate 520, the upper pressing plate 510 and the lower pressing plate 520 clamp the axle 310 to fix the axle 310, the upper pressing plate 510 has a downwardly protruding boss 511, the lower pressing plate 520 has a mounting hole 521, the boss 511 is inserted into the mounting hole 521, and a screw is screwed into the upper cover through the mounting hole 521 and the boss 511 to fix the upper pressing plate 510 and the lower pressing plate 520 together at the outer end of the upper cover. Thus, the wheel 300 is detachably fixed to both ends of the upper cover and the lower cover, and the two metal pieces jointly clamp the axle 310, so that the wheel 300 is more firmly installed.

As shown in fig. 2-4, the first upper cover 110 and the second upper cover 120 have a pedal region 150, the pedal region 150 has a contact hole 151 and a limit through hole 152, a contact plate 160 is disposed on the upper surface of the pedal region 150, a silicone rubber pedal 170 is disposed on the contact plate, a contact post 161 disposed on the contact plate 160 passes through the contact hole 151, a limit member capable of moving up and down in the through hole is disposed on the limit through hole 152, the upper end of the limit member is fixedly connected to the contact plate 160, the lower end of the limit member is disposed with a limit cap, the diameter of the limit cap is greater than that of the limit through hole 152, a return member is disposed between the first upper cover 110 and the second upper cover 120 and the corresponding contact plate 160, and the return member may be an elastic body such as a spring. Further taking the first upper cover 110 as an example, the pedal region 150 of the first upper cover 110 has two sets of contact holes 151 and limiting through holes 152 distributed back and forth, each set has one contact hole 151 and three limiting through holes 152, the three limiting through holes 152 surround the periphery of the contact hole 151 at equal intervals, thus the limiting through holes 152 can play a relatively balanced guiding role, the contact posts 161 can move smoothly up and down conveniently, the limiting part adopts a screw, and the limiting cap is a nut of the screw.

When a user steps on the balance car with feet, the feet can press the contact plate 160, the contact plate 160 overcomes the elastic force of the return piece to move downwards, so that the contact column 161 triggers the balance switch to enable the gyroscope and the speed sensor in the balance car to start working, the balance car starts self-balancing, and the balance switch can be a microwave induction switch, an ultrasonic induction switch, an infrared induction switch or a microswitch. In this embodiment, the balance switch includes an infrared sensing emitting area and a receiving area, and when the contact post 161 moves down to block the emitting area and the receiving area, the receiving area cannot receive an infrared signal, and the controller 800 starts the gyroscope and the speed sensor to work according to the condition of the infrared sensing switch to realize self-balancing. The gyroscope in the balance car can detect the rotation positions of the first upper cover 110 and the second upper cover 120 and transmit signals to the controller 800, and the controller 800 can control the rotation speed and the rotation direction of the wheels 300 according to the information of the gyroscope, so that the control of the balance car on reversing, advancing, accelerating, decelerating, turning and the like is realized. When a user leaves the balance car, the contact plate 160 moves upwards under the action of the return piece, the contact post 161 returns to the original position, the limiting cap abuts against the lower end edge of the limiting through hole 152 to avoid the contact plate 160 from moving upwards excessively, the balance car is closed due to the disconnection of the balance switch, and therefore when the user steps on the balance car by one foot, the balance car cannot be in disorder, the use safety of the balance car is improved, and the control of a novice is facilitated. The balance car is powered by a battery 700, and the battery 700 is fixed on the upper cover by a fixing plate 710.

Claims (10)

1. A portable electric balance car comprises an upper cover and a lower cover, wheels (300) are arranged at two ends of the upper cover and the lower cover, the upper cover and the lower cover are made of plastics, the upper cover comprises a first upper cover (110) and a second upper cover (120), the lower cover comprises a first lower cover (210) and a second lower cover (220), the portable electric balance car is characterized in that a first rotating seat (410) is arranged between the inner end part of the first upper cover (110) and the inner end part of the first lower cover (210), a second rotating seat (420) is arranged between the inner end part of the second upper cover (120) and the inner end part of the second lower cover (220), the first rotating seat (410) and the second rotating seat (420) are made of metal, and rotating assemblies are arranged on the first rotating seat (410) and the second rotating seat (420) to enable the first upper cover (110), the first lower cover (210) and the second upper cover (120) respectively, The second lower cover (220) is rotatably connected, a fixing piece (500) made of metal is arranged between the outer end part of the upper cover and the outer end part of the lower cover, and an axle (310) of the wheel (300) is fixed on the fixing piece (500).

2. A portable electric balance vehicle according to claim 1, wherein the rotating assembly comprises a rotating shaft (600), a first end of the rotating shaft (600) is fixed on the first rotating base (410), and a second end of the rotating shaft (600) is mounted on the second rotating base (420) through a bearing; or, the rotating assembly comprises a rotating shaft (600), and both ends of the rotating shaft (600) are respectively mounted on the first rotating seat (410) and the second rotating seat (420) through bearings.

3. A portable electric balance car according to claim 2, wherein the first rotating base (410) and the second rotating base (420) each include a connecting portion (430) having an inner cavity (431), the connecting portion (430) extends to both sides to form a fixing portion (440), the fixing portions (440) of the first rotating base (410) and the second rotating base (420) are fixed to the first upper cover (110) and the second upper cover (120) by screws, respectively, and both end portions of the rotating shaft (600) are installed in the inner cavities (431) of the connecting portions (430) of the first rotating base (410) and the second rotating base (420), respectively.

4. The portable electric balance car as claimed in claim 3, wherein the first upper cover (110) and the second upper cover (120) are provided with position-limiting pillars (130), the fixing part (440) is provided with position-limiting holes (441), and the position-limiting pillars (130) are inserted into the position-limiting holes (441).

5. The portable electric balance car as claimed in claim 4, wherein the limit post (130) has a threaded hole (131), the first lower cover (210) and the second lower cover (220) both have a fixing hole (230) corresponding to the threaded hole (131), and the inner ends of the first lower cover (210) and the second lower cover (220) are respectively fixed to the inner ends of the first upper cover (110) and the second upper cover (120) by screws passing through the fixing holes (230) and screwed into the threaded holes (131).

6. The portable electric balance car according to claim 5, wherein the inner ends of the first upper cover (110) and the second upper cover (120) are provided with upper reinforcing ribs (140), the upper reinforcing ribs (140) surround upper mounting grooves (141), the first rotating seat (410) and the second rotating seat (420) are respectively partially embedded into the corresponding upper mounting grooves (141), and the upper reinforcing ribs (140) are abutted against the fixing portion (440).

7. The portable electric balance vehicle as recited in claim 6, wherein the inner ends of the first lower cover (210) and the second lower cover (220) are provided with fixing posts (240), the fixing holes (230) are located on the fixing posts (240), the ends of the fixing posts (240) are provided with sunken grooves (241), and the limiting posts (130) protrude downwards from the upper reinforcing ribs (140) and are inserted into the sunken grooves (241).

8. The portable electric balance car according to claim 6 or 7, wherein the first lower cover (210) and the second lower cover (220) each have a lower reinforcing rib (250) corresponding to the upper reinforcing rib (140), the lower reinforcing rib (250) defines a lower mounting groove (251) corresponding to the upper mounting groove (141), and the first rotating seat (410) and the second rotating seat (420) are partially inserted into the corresponding lower mounting grooves (251).

9. The portable electric balance vehicle as claimed in any one of claims 1 to 7, wherein the fixing member (500) comprises an upper pressing plate (510) and a lower pressing plate (520), the upper pressing plate (510) and the lower pressing plate (520) clamp the axle (310) to fix the axle (310), the upper pressing plate (510) is provided with a downwardly protruding boss (511), the lower pressing plate (520) is provided with a mounting hole (521), the boss (511) is inserted into the mounting hole (521), and a screw is screwed into the upper cover through the mounting hole (521) and the boss (511) to fix the upper pressing plate (510) and the lower pressing plate (520) together at the outer end of the upper cover.

10. A portable electric balance car according to any one of claims 1 to 7, characterized in that the first upper cover (110) and the second upper cover (120) are provided with pedal areas (150), the pedal area (150) is provided with a contact hole (151) and a limit through hole (152), the upper surface of the pedal area (150) is provided with a contact plate (160), the contact plate (160) is provided with a contact column (161) which penetrates through the contact hole (151), a limiting piece capable of moving up and down in the through hole is arranged on the limiting through hole (152) in a penetrating way, the upper end of the limiting piece is fixedly connected with the contact plate (160), the lower end of the limiting piece is provided with a limiting cap, the diameter of the limiting cap is larger than that of the limiting through hole (152), and a return piece is arranged between the first upper cover (110) and the second upper cover (120) and the corresponding contact plate (160).

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