Modularly-driven light electric two-wheeled vehicle

Abstract

The utility model discloses a light electric two-wheeled vehicle of modularization drive, including vehicle overall frame, front wheel system and rear wheel system, the vehicle overall frame includes frame, seat cushion and pedal, the front wheel system includes front wheel set, front wheel shafting, front shock absorber system and front handlebar. 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. Through the rearranged power unit, unsprung mass can be minimized. The suspension structure of the triangular double shock absorbers can reduce the number of components, the design of the shock absorption structure is simplified, and the reliability is improved. 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.

Description

Technical Field

[0001] This utility model relates to electric two-wheeled vehicles, specifically a modularly driven lightweight electric two-wheeled vehicle. Background Technology

[0002] Most electric bicycles and various two-wheeled vehicles on the market use hub motors or external geared motors located at the bottom axle.

[0003] Disadvantages: Direct-drive hub motors have low speeds, resulting in heavy weight and inconvenience in carrying. Furthermore, excessively large low-speed motors waste resources during production. Gear motors located at the bottom bracket are typically used in electric off-road motorcycles to increase power and torque. However, due to the need for coordination with shock absorbers and the frame structure, installation, maintenance, and repair become inconvenient, and drive chain and belt failures are more frequent.

[0004] Given that the higher the motor speed, the greater its power-to-weight ratio, using a high-speed motor with a suitable speed reducer can significantly reduce the overall weight of the machine while maintaining the motor's rated and peak power. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a modularly driven lightweight electric two-wheeler.

[0006] The technical solution of this utility model is implemented as follows: A modularly driven lightweight electric two-wheeler includes a vehicle overall frame, a front wheel system, and a rear wheel system. The vehicle overall frame includes a frame, a seat, and foot pedals. The front wheel system includes a front wheel assembly, a front axle system, a front shock absorber system, and a front handlebar. The rear wheel system includes an electronic control unit, a lower suspension movable unit, a battery pack unit, a wheel assembly unit, a shock absorber, and a motor drive unit. The electronic control unit is connected to the frame. The lower suspension movable unit includes a wheel hub, a driving pulley, a driven pulley, a belt, a bevel gear set, a universal coupling, a wheel axle fixing body, a linear sliding sleeve, and a sliding sleeve connecting plate.

[0007] The upper part of the linear optical axis is mounted on the electronic control unit, and the lower part is sleeved inside the linear sliding sleeve; the lower part of the linear optical axis is connected to the vehicle frame.

[0008] The motor driving unit comprises a driving unit shell installed on both sides of the electric control unit, a high-speed motor, a driving gear, a driven gear, a universal joint, and a bevel gear set installed inside the driving unit shell; 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, the driving small pulley and the driven pulley form a pulley set, and the driven pulley is connected with the wheel hub; the belt transmission has low noise and small vibration; the modular structure facilitates replacement and maintenance; the upper part of the linear slide is installed on the slide connecting plate, the lower part is connected with the wheel shaft fixed body, and forms an inverted U-shaped structure with the slide connecting plate, so that the entire suspension lower movable unit can slide up and down, and the motion direction and stroke of the shock absorption are limited.

[0009] The upper part of the shock absorber is installed on the electric control unit, and the lower part is installed on the slide connecting plate, forming a suspension upper movable unit.

[0010] Further, the battery unit is installed on both sides of the electric control unit.

[0011] Further, the upper parts of the two shock absorbers are installed on the electric control unit, and the lower parts are installed on the slide connecting plate in an inclined manner, and form a triangular structure with the electric control unit; when the linear slide moves up and down, the two shock absorbers are compressed or elongated in an inclined manner, and the two inclined shock absorbers can reduce the number of components, simplify the shock absorption structure, and improve reliability; in addition, even if one side of the shock absorber is damaged, the other side can still function.

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

[0013] Further, 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, 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 joint comprises a telescopic joint of a sliding spline sleeve structure connecting two constant velocity joints at both ends; the upper half of the universal joint is fixed in the driving unit shell, and the lower half of the sliding part of the universal joint is located below the shock absorption system spring; the telescopic joint of the universal joint realizes fixed installation of the motor, so that the power unit does not move with the suspension; the transmission system and the upper and lower shock absorption systems are connected through the telescopic universal joint, which can reduce the mass below the spring as much as possible; the high-speed motor is fixed to the vehicle frame through the driving unit shell and does not bear the impact and vibration of the wheel set, which can reduce the design and installation difficulty, improve the reliability and prolong the service life, and facilitate the design and installation of the heat dissipation structure and the electrical connection.

[0015] Compared with the prior art, the utility model discloses the beneficial effects are: the utility model discloses the high -speed motor is through gear reduction, constant velocity universal joint power transmission, finally with the belt speed reducer drive wheel group rotation, realizes the power layout of modularization. Due to the power / weight ratio of high -speed motor is greater, can effectively reduce the total weight of vehicle. The hub motor of original design can greatly increase the mass under the spring, and the control flexibility is deteriorated, and through the power unit of rearrangement, the mass under the spring can be minimized. The suspension structure of triangular double shock absorber can reduce the number of components, simplify the shock absorption structure design, improve reliability, and even if one side shock absorption is damaged, the other side can maintain the function. The upper half of universal coupling is fixed in the drive unit shell, and the lower half of the universal coupling is located in the shock absorption system under the spring, and the motor is fixedly installed through the telescopic joint of the universal coupling, so that the power unit does not move with the suspension. Since the modular structure is adopted, it is convenient to disassemble and maintain, and the reassembly is simple. The last stage adopts belt drive, reduces noise and is convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as the limitation to the scope, and for the ordinary skilled person in the art, other related drawings can also be obtained according to these drawings without the creative labor.

[0017] Figure 1 It is the overall structure diagram.

[0018] Figure 2 It is the structure of rear wheel system Figure One .

[0019] Figure 3 It is the structure of rear wheel system Figure Two .

[0020] Figure 4 It is the structure of rear wheel system Figure Three .

[0021] Figure 5 It is the structure of rear wheel system Figure Four .

[0022] In the diagram: 200, frame; 202, seat; 203, pedals; 205, electronic control unit; 201, shock absorber; 300, battery pack unit; 400, wheelset unit; 401, wheel hub; 500, pedals; 600, linear optical shaft; 700, motor drive unit; 701, drive unit housing; 702, high-speed motor; 703, drive gear; 704, driven gear; 705, universal coupling; 706, bevel gear set; 708, drive pulley; 709, belt; 710, driven pulley; 800, linear sleeve; 801, wheel axle fixing body; 802, sleeve connecting plate; 900, front wheel assembly; 901, front wheel axle system; 902, front handlebars; 903, front shock absorber system. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figures 1-5 As shown, a lightweight electric unicycle with an externally driven motor and a modularly driven lightweight electric two-wheeler include a vehicle frame, a front wheel system, and a rear wheel system. The vehicle frame includes a frame 200, a seat 202, and footrests 203. The front wheel system includes a front wheel assembly 900, a front axle system 901, a front shock absorber system 903, and a front handlebar 902. The rear wheel system includes an electronic control unit 205, a movable suspension unit, a battery pack unit 300, a wheel assembly unit 400, a shock absorber 201, and a motor drive unit 700. The electronic control unit 205 is connected to the frame 200.

[0025] The movable suspension unit includes a hub 401, a driving pulley 708, a driven pulley 710, a belt 709, a bevel gear set 706, a universal coupling 705, a wheel axle fixing body 801, a linear sleeve 800, and a sleeve connecting plate 802.

[0026] The upper part of the linear optical axis 600 is mounted on the electronic control unit 205, and the lower part is sleeved in the linear sliding sleeve 800. The lower part of the linear optical axis 600 is connected to the frame.

[0027] The motor driving unit 700 comprises a driving unit shell 701 installed on both sides of the electric control unit 205, and a high-speed motor 702, a driving gear 703, a driven gear 704, a universal joint 705, and a bevel gear set 706 installed inside 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 joint 705, the bevel gear set is connected with a driving small pulley 708, the driving small pulley 708 and a driven pulley 710 form a pulley set, and the driven pulley 710 is connected with a wheel hub axle; the belt transmission has low noise and small vibration, and the modular structure facilitates replacement and maintenance; the linear slide 800 is installed on the slide connecting plate 802 in the upper part and integrally connected with the wheel axle fixing body 801 in the lower part, and forms an inverted U-shaped structure with the slide connecting plate 801, so that the entire lower suspension part can slide up and down, and the motion direction and stroke of damping are limited.

[0028] Two dampers 201 are installed on the electric control unit 205 in the upper part and installed on the slide connecting plate 802 in the lower part in an inclined manner, and form a triangular structure with the electric control unit 205; when the linear slide 800 moves up and down, the two dampers are compressed or elongated in an inclined manner, and two inclined dampers can reduce the number of components, simplify the damping structure, and improve reliability; in addition, even if one side of the damper is damaged, the other side can still function.

[0029] The battery unit 300 is installed on both sides of the electric control unit 205.

[0030] 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.

[0031] The universal joint 705 is composed of a telescopic joint of a sliding spline sleeve structure connecting two constant velocity joints at both ends, 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 spring of the damping system, the telescopic joint of the universal joint is used to realize the fixed installation of the motor, 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, does not bear the impact and vibration of the wheel set, can reduce the design and installation difficulty, improve the reliability and prolong the service life, and is convenient for designing and installing the heat dissipation structure and electrical connection.

[0032] 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 spindle is connected with the telescopic universal coupling 705, the telescopic universal coupling 705 with the splines drives the bevel gear set 706, after changing 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, and then drives the front wheel system.

[0033] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A modular driven light electric two-wheeler comprising of a vehicle overall frame, a front wheel system and a rear wheel system, the vehicle overall frame comprising of a frame, a seat cushion and a foot rest, the front wheel system comprising of a front wheel set, a front wheel axle train, a front shock absorber system and a front handle bar, characterized in that, The rear wheel system comprises an electric control unit, a suspension lower movable unit, a battery pack unit, a wheel unit, a shock absorber, and a motor drive unit; the electric control unit is connected to the frame, the upper part of the shock absorber is installed on the electric control unit, and the lower part is installed on the sliding sleeve connecting plate; the suspension lower movable unit comprises a wheel hub, a driving small pulley, a driven pulley, 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 unit, and the lower part is sleeved in the linear sliding sleeve; the lower part of the linear light shaft is connected to the frame; the motor drive unit comprises a drive unit housing installed on both sides of the electric control 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, the driven gear shaft is connected to the bevel gear set through the telescopic universal joint, the bevel gear set is connected to the driving small pulley, the driving small pulley and the driven pulley form a pulley set, and the driven pulley is connected to the wheel hub wheel shaft; the upper part of the linear sliding sleeve is installed on the sliding sleeve connecting plate, the lower part is connected to the wheel shaft fixing body, and the linear sliding sleeve connecting plate forms an inverted U-shaped structure.

2. A modularly driven light electric two-wheeled vehicle according to claim 1, characterized in that, The battery pack unit is installed on both sides of the electric control unit.

3. The modularly driven light electric two-wheeled vehicle according to claim 1, wherein, The upper parts of the two shock absorbers are installed on the electric control unit, the lower parts are installed on the sliding sleeve connecting plate in an inclined manner, and the electric control unit forms a triangular structure.

4. The modularly driven light electric two-wheeled vehicle according to claim 1, wherein, The lower part of the linear sliding sleeve is an integral structure with the wheel shaft fixing body.

5. The modularly driven light electric two-wheeled vehicle according to claim 1, wherein, The shock absorber is a gas pressure shock absorber, the piston cavities of the two gas pressure shock absorbers are connected by a pipeline, so that the internal pressures of the two shock absorbers are equal, and the balance of the pressures on both sides is maintained.

6. The modularly driven light electric two-wheeled vehicle according to claim 1, wherein, The universal joint is composed of a telescopic joint with a sliding spline sleeve structure connecting two constant velocity universal joints at both ends, 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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