Light electric single-wheel balance car driven by external motor

Abstract

The utility model discloses a light electric single-wheel balance car driven by an external motor. The light electric single-wheel balance car comprises an electric control and seat cushion unit, a suspension lower movable unit, a motor driving unit, a shock absorber, a battery pack unit, a wheel set unit, a pedal and the like. A high-speed motor is used for speed reduction through a gear and power transmission through a constant velocity universal joint, and finally a belt speed reducer is used for driving a wheel set to rotate, so that modular power layout is achieved. Due to the fact that the power / weight ratio of the high-rotating-speed motor is larger, the total weight of the vehicle can be effectively reduced. The suspension structure of the triangular double shock absorbers can reduce the number of components. The upper half part of the universal coupling is fixed in the shell of the driving unit, the lower half sliding part of the universal coupling is positioned below the damping system spring, and the motor is fixedly mounted through the expansion joint of the universal coupling, so that the power unit does not move along with the suspension. Due to the adoption of the modularized structure, the disassembly and maintenance are convenient, and the reassembly and combination are simple and convenient. The last stage adopts belt transmission, noise is reduced, and maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a body -building amusement device, concretely is a light -duty electric unicycle of external motor drive. BACKGROUND

[0002] The existing electric unicycle on the market generally adopts the wheel hub motor, which leads to the heavy weight of the motor, the unicycle cannot reduce the weight, is inconvenient to carry, and the oversized low-speed motor wastes resources in production. Since the higher the motor speed is, the greater the power / weight ratio is, adopting the high-speed motor and applying a suitable reducer scheme can greatly reduce the overall weight while keeping the rated power and peak power of the motor. SUMMARY

[0003] In order to overcome the above-mentioned defects, the utility model provides a light -duty electric unicycle of external motor drive.

[0004] The technical scheme of the utility model is achieved as follows: a light -duty electric unicycle of external motor drive, comprising an electric control and seat cushion unit, a suspension lower movable unit, a motor drive unit, a shock absorber, a battery pack unit, a wheel set unit and a pedal;

[0005] The suspension lower movable unit comprises a wheel hub, a driving small pulley, a driven pulley, a belt, a bevel gear set, a universal joint, a wheel shaft fixing body, a straight line slide sleeve and a slide sleeve connecting plate;

[0006] The upper part of the straight line optical axis is installed on the electric control and seat cushion unit, and the lower part is sleeved in the straight line slide sleeve;

[0007] The motor drive unit comprises a drive unit shell installed on both sides of the electric control and seat cushion unit, and a high-speed motor, a driving gear, a driven gear, a universal joint and a bevel gear set installed inside the drive unit shell, which constitute an independent motor drive unit module; the high-speed motor is connected with the driving gear, the driven gear spindle is connected with the bevel gear set through the telescopic universal joint, the bevel gear set is connected with the driving small pulley, and the driving small pulley and the driven pulley constitute a pulley set, and the driven pulley is connected with the wheel hub wheel shaft; the belt transmission has low noise and small vibration, and the modular structure makes it convenient to replace and maintain; the upper part of the straight line slide sleeve is installed on the slide sleeve connecting plate, the lower part is connected with the wheel shaft fixing body, and the slide sleeve connecting plate constitutes an inverted U-shaped structure, so that the entire suspension lower movable unit can slide up and down, and the movement direction and stroke of the shock absorption are limited;

[0008] The upper part of the shock absorber is installed on the electric control and seat cushion unit, and the lower part is installed on the slide sleeve connecting plate, which constitutes a suspension upper movable unit;

[0009] The pedal is connected with the lower part of the straight line optical axis.

[0010] Further, the battery pack units are installed on both sides of the electric control and seat cushion units.

[0011] Further, the upper parts of the two shock absorbers are installed on the electric control and seat cushion units, and the lower parts are installed on the slide sleeve connecting plate in an inclined manner, and form a triangular structure with the electric control and seat cushion units.

[0012] Further, the lower part of the linear slide sleeve is an integral structure with the wheel shaft fixing body.

[0013] Further, the shock absorbers are air pressure shock absorbers, and the piston cavities of the two air pressure shock absorbers are connected by pipelines, so that the internal pressures of the two shock absorbers are equal, and the balance of the pressures on both sides is maintained.

[0014] Further, the universal coupling is composed of a telescopic joint of a sliding spline sleeve structure and two constant velocity universal joints at both ends, the upper half of the universal coupling is fixed in the driving unit shell, and the lower half of the sliding part of the universal coupling is located under the spring of the damping system, and the motor is fixed and installed through the telescopic joint of the universal coupling, so that the power unit does not move with the suspension.

[0015] Compared with the prior art, the utility model has the advantages that: the utility model realizes the modularized power layout by adopting a high-speed motor, gear reduction, constant velocity universal joint power transmission, and finally driving the wheel set to rotate through a belt reducer. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 is a general structure diagram.

[0018] Figure 2 is a general mechanism diagram.

[0019] Figure 3 is a drive unit structure diagram.

[0020] Figure 4 is a drive unit structure diagram.

[0021] Figure 5 is a frame structure diagram.

[0022] Figure 6 is a general assembly appearance diagram.

[0023] In the drawings: 200, electric control and seat cushion unit; 201, shock absorber; 300, battery pack unit; 400, wheel set unit; 401, hub; 500, pedal; 600, straight light axis; 700, motor drive unit; 701, drive unit shell; 702, high-speed motor; 703, driving gear; 704, driven gear; 705, universal coupling; 706, bevel gear set; 708, driving small pulley; 709, belt; 710, driven pulley; 800, straight sliding sleeve; 801, axle fixing body; 802, sliding sleeve connecting plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] As shown in Figures 1-6 , a light electric unicycle balance car driven by an external motor includes an electric control and seat cushion unit 200, a suspension movable unit, a motor drive unit 700, a shock absorber 201, a battery pack unit 300, a wheel set unit 400 and a pedal 500.

[0026] The suspension movable unit comprises a wheel hub 401, a driving small pulley 708, a driven pulley 710, a belt 709, a bevel gear set 706, a universal coupling 705, a wheel shaft fixing body 801, a linear sliding sleeve 800 and a sliding sleeve connecting plate 802.

[0027] The linear optical axis 600 is mounted on the electric control and seat cushion unit 200 at the upper portion and is sleeved in the linear sliding sleeve 800 at the lower portion.

[0028] The motor driving unit 700 comprises a driving unit shell 701 mounted on both sides of the electric control and seat cushion unit 200, and a high-speed motor 702, a driving gear 703, a driven gear 704, a universal coupling 705 and a bevel gear set 706 mounted in the driving unit shell; the high-speed motor 702 and the driving gear 703 and the driven gear 704 constitute a pair of gear sets mounted in the driving unit shell 701; the high-speed motor 702 is connected with the driving gear 703, the main shaft of the driven gear 704 is connected with the bevel gear set 706 through the telescopic universal coupling 705, the bevel gear set is connected with the driving small pulley 708, the driving small pulley 708 and the driven pulley 710 constitute a pulley set, and the driven pulley 710 is connected with the wheel hub wheel shaft; the belt transmission has low noise and small vibration, and the modular structure makes replacement and maintenance convenient; the linear sliding sleeve 800 is mounted on the sliding sleeve connecting plate 802 at the upper portion and is integrally connected with the wheel shaft fixing body 801 at the lower portion, and forms an inverted U-shaped structure with the sliding sleeve connecting plate 801, so that the entire lower suspension part can slide up and down, and the movement direction and stroke of damping are limited.

[0029] The two dampers 201 are mounted on the electric control and seat cushion unit 200 at the upper portions and are obliquely mounted on the sliding sleeve connecting plate 802 at the lower portions, and form a triangular structure with the electric control and seat cushion unit; when the linear sliding sleeve 800 moves up and down, the two dampers are obliquely compressed or elongated, and the two oblique dampers can reduce the number of components, simplify the damping structure and improve reliability, and in addition, even if one side of the damper is damaged, the other side can still function.

[0030] The pedal 500 is connected with the lower portion of the linear optical axis 600, and the battery pack unit 300 is mounted on both sides of the electric control and seat cushion unit 200.

[0031] The damper is a gas pressure damper, and the piston cavities of the two gas pressure dampers are connected by a pipeline, so that the internal pressures of the two dampers are equal, and the balance of the pressures on both sides is maintained.

[0032] The universal joint 705 is composed of a universal joint connected to both ends of a telescopic joint of a sliding spline sleeve structure, the upper half of the universal joint 705 is fixed in the driving unit shell 701, the lower half of the sliding part of the universal joint is located below the damping system spring, the motor is fixedly installed through the telescopic joint of the universal joint, so that the power unit does not move with the suspension. The transmission system and the upper and lower damping systems are connected through the telescopic universal joint, so that the mass below the spring can be reduced as much as possible. The high-speed motor is fixed to the frame through the driving unit shell and does not bear the impact and vibration of the wheel set, so that the design and installation difficulty can be reduced, the reliability can be improved, the operation life can be prolonged, and the heat dissipation structure and electrical connection are facilitated.

[0033] The working principle of the driving unit is that the high-speed motor 702 drives the driving gear 703, the driving gear 703 and the driven gear 704 form a pair of gear sets, the driven gear shaft is connected with the telescopic universal joint 705, the telescopic universal joint 705 with splines drives the bevel gear set 706, changes the transmission direction, drives the driving small pulley 708, and then drives the driven pulley 710 to rotate through the belt 709, and then drives the wheel hub 401 to rotate.

[0034] The above only describes preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A light-weight electrically motor-driven unicycle balance car, characterized in that, The electric control and seat cushion unit, shock absorber, suspension lower movable unit, motor drive unit, battery pack unit, wheel set unit and pedal are included. The upper part of the shock absorber is installed on the electric control and seat cushion unit, and the lower part is installed on the sliding sleeve connecting plate. The suspension lower movable unit includes a wheel hub, a driving small pulley, a driven pulley, a belt, a bevel gear set, a universal joint, a wheel shaft fixing body, a linear sliding sleeve and a sliding sleeve connecting plate. The upper part of the linear light shaft is installed on the electric control and seat cushion unit, and the lower part is sleeved in the linear sliding sleeve. The motor drive unit includes drive unit housings installed on both sides of the electric control and seat cushion unit, and a high-speed motor, a driving gear, a driven gear, a universal joint and a bevel gear set installed inside the drive unit housing. The high-speed motor is connected to the driving gear, and the driven gear spindle is connected to the bevel gear set through the telescopic universal joint. The bevel gear set is connected to the driving small pulley, and the driving small pulley and the driven pulley form a pulley set, and the driven pulley is connected to the wheel hub wheel shaft.

2. The light electric unicycle balance car driven by an external motor according to claim 1, characterized in that, The upper part of the linear sliding sleeve is installed on the sliding sleeve connecting plate, and the lower part is connected to the wheel shaft fixing body and forms an inverted U-shaped structure with the sliding sleeve connecting plate.

3. The light-weight electrically motor-driven unicycle balance car of claim 1, wherein, The pedal is connected to the lower part of the linear light shaft.

4. The light-weight electrically motor-driven unicycle balance car of claim 1, wherein, The battery pack unit is installed on both sides of the electric control and seat cushion unit.

5. The light-weight electrically motor-driven unicycle balance car of claim 1, wherein, The upper parts of the two shock absorbers are installed on the electric control and seat cushion unit, and the lower parts are installed on the sliding sleeve connecting plate in an inclined manner, and form a triangular structure with the electric control and seat cushion unit.

6. The light electric unicycle balance car driven by an external motor according to claim 1, characterized in that, The lower part of the linear sliding sleeve is an integral structure with the wheel shaft fixing body. The shock absorber is a gas pressure shock absorber, and the piston cavities of the two gas pressure shock absorbers are connected by a pipeline to equalize the internal pressure of the two shock absorbers and maintain the balance of the pressure on both sides. The universal joint is composed of a telescopic joint with a sliding spline sleeve structure connecting two constant velocity joints at both ends, and the upper half of the universal joint is fixed in the drive unit housing, and the lower half of the sliding part of the universal joint is located below the shock absorbing system.

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