Electric motorcycle

Abstract

The utility model relates to an electric motorcycle which comprises a frame, a battery, a power generation system, a motor system, a rear wheel and a control system. The power generation system comprises an engine and a power generation device, the engine comprises a crankshaft and an engine box body, the power generation device comprises a stator and a rotor, the stator is fixedly locked on the engine box body, and the rotor is arranged at the tail end of the crankshaft in a sleeving mode so that the rotor and the crankshaft can rotate synchronously. The motor system comprises a motor and a gear box, the motor is provided with a motor shaft, the gear box is provided with an output shaft, and power is transmitted to the output shaft after being decelerated by the motor shaft. The rear wheel is fixedly arranged on the output shaft, so that the rear wheel and the output shaft rotate synchronously. The control system is electrically connected with the battery, the power generation system and the motor system. Therefore, the problem of insufficient endurance of the electric motorcycle can be effectively improved, and the smooth running characteristic of the electric motorcycle can be kept.

Description

Technical Field

[0001] The utility model relates to an electric motorcycle, in particular to an electric motorcycle with a side-mounted motor. Background Art

[0002] The energy source of existing electric motorcycles is the electricity stored in the battery, and the battery is charged directly by the user or through a charging station. However, there are still technical bottlenecks in the current battery's power storage capacity, and the charging time is longer than the time spent refueling. Therefore, the driving range of electric motorcycles is significantly lower than that of motorcycles with internal combustion engines, and the requirements for charging or swapping sites and equipment are also higher. As a result, users of electric motorcycles generally have range anxiety.

[0003] In addition, existing electric motorcycles use hub motors, that is, the motor system is integrated into the wheel set. However, limited by the space of the wheel set, the volume of the motor system needs to be minimized, so there are generally problems such as low motor output power, high complexity, and difficult maintenance, which do not meet the driving requirements of users for motorcycles.

[0004] Due to this, the inventor, with a positive creative spirit, urgently thought about an electric motorcycle that can solve the above problems. After several research and experiments, the utility model was finally completed. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide an electric motorcycle, which specially designs an engine dedicated to generating electricity through an extended-range power architecture and conducts start control through a control system. When the engine starts, electricity can be generated by a power generation device and stored in the battery, and the battery provides power to drive the motor to drive the motorcycle. Such an electric motorcycle can charge the battery in the existing way, or add gasoline in the traditional way and charge the battery through engine power generation. Therefore, in application, it can improve the problem of insufficient endurance of existing electric motorcycles, solve the range anxiety of users, and at the same time reduce exhaust emissions and air pollution through optimized engine operation settings, and can maintain the smooth driving characteristics of electric motorcycles, with excellent vehicle commerciality.

[0006] To achieve the above object, the electric motorcycle of the present utility model includes a frame, a battery, a power generation system, a motor system, a rear wheel, and a control system. Among them, the battery is carried on the frame. The power generation system is connected to the frame and includes an engine and a power generation device connected to the engine. The power generation device is electrically connected to the battery. The engine includes a cylinder head, a cylinder, a piston, a connecting rod, a crankshaft, and an engine housing covering the crankshaft. The power generation device includes a stator and a rotor. The stator is fixed to the engine housing, and the rotor is sleeved on the end of the crankshaft so that the rotor rotates synchronously with the crankshaft to store the electric power generated by the power generation device coaxial with the crankshaft when the engine is started in the battery. The motor system is electrically connected to the battery and includes a motor and a gearbox. The motor has a motor shaft, and the gearbox has a gear set and an output shaft. The gear set meshes with the motor shaft and the output shaft respectively, so that the battery provides power to drive the motor system, and the power is transmitted from the motor shaft to the output shaft after deceleration. The rear wheel is fixed to the output shaft so that the rear wheel rotates synchronously with the output shaft, thereby driving the motorcycle to travel. The control system is electrically connected to the battery, the power generation system, and the motor system respectively to control the opening and closing of the engine, the charging and discharging of the battery, and the power output.

[0007] The above engine further includes a housing shell connected to the engine housing, and the power generation device can be accommodated in the accommodation space covered by the engine housing and the housing shell.

[0008] The above engine housing can be provided with a first bearing and a second bearing, and the housing shell can be provided with a third bearing. The crankshaft can be respectively passed through and supported in the first bearing, the second bearing, and the third bearing to enable the crankshaft to have sufficient structural support.

[0009] The above electric motorcycle further includes an intake system. The intake system can include an air filter. The air filter can be connected to the cylinder head through an intake pipe, and the intake system can be located above the power generation system or the motor system. The intake system is used to filter the external air and provide the air required for engine combustion.

[0010] The above electric motorcycle further includes an exhaust system. The exhaust system can include a muffler. The muffler can be connected to the cylinder head through a front exhaust pipe, and the exhaust system can be located on the opposite side of the power generation system or the motor system. The exhaust system is used to guide the burned exhaust gas to the muffler, and the exhaust gas is expanded and silenced and then discharged rearward to the atmosphere.

[0011] The above engine housing can have a connecting portion, and the engine housing can be connected to the motor through the connecting portion.

[0012] The above power generation system and the motor system can be consolidated into an integral rocker arm structure through the connecting portion.

[0013] The above-mentioned electric motorcycle further includes a rear shock absorber. The frame can be connected to an integral swingarm structure through the rear shock absorber to support the weight of the vehicle body and the user, and buffer the impact of the motorcycle on the road surface.

[0014] The above-mentioned battery can be located above the power generation system, and the control system can be located behind the battery.

[0015] The above-mentioned rotor can be tightened to the crankshaft with a nut.

[0016] Through the above design, when the battery has insufficient power storage, the engine can be started to generate electricity and store the power, so as to increase the riding range and solve the problem of range anxiety. In addition, the electric motorcycle is driven by a motor, so it can retain the advantages of strong starting acceleration, smooth driving, and low noise of the electric motorcycle. The engine is only used for power generation and not directly driven, so the operating conditions are simple and controllable, and the engine operation settings and related designs of engine parts can be optimized. Furthermore, the engine operates in the block with the best thermal efficiency, and the overall thermal efficiency is relatively high. Even if the user does not charge the battery additionally, it has better fuel economy than fuel motorcycles, which can further reduce the overall gasoline consumption and lower the usage cost.

[0017] On the other hand, since the power of the electric motorcycle can be charged by the engine generating electricity, it is not necessary to replace the battery separately or charge the battery with an external power source, so the convenience of use can also be increased. Therefore, the electric motorcycle of the present utility model can improve the product commerciality, and as one of the selling points of the product, it can meet the all-round use needs of consumers.

[0018] The above summary and the following detailed description are both exemplary in nature and are intended to further illustrate the scope of the patent application of the present utility model. Other objects and advantages of the present utility model will be elaborated in the subsequent specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the electric motorcycle according to a preferred embodiment of the present utility model.

[0020] Figure 2 It is a top view of the electric motorcycle according to a preferred embodiment of the present utility model.

[0021] Figure 3 It is a partial sectional view of the electric motorcycle according to a preferred embodiment of the present utility model.

[0022] Figure 4 It is a system architecture diagram of the electric motorcycle according to a preferred embodiment of the present utility model.

[0023] Description of the main component symbols:

[0024] 1 Electric motorcycle

[0025] 2 Frame

[0026] 3 Battery

[0027] 4 Power Generation System

[0028] 41 Engine

[0029] 411 Cylinder Head

[0030] 412 Cylinder

[0031] 413 Piston

[0032] 414 Connecting Rod

[0033] 415 Crankshaft

[0034] 416 Engine Housing

[0035] 416a Connecting Part

[0036] 417 Housing Shell

[0037] 42 Power Generation Device

[0038] 421 Stator

[0039] 422 Rotor

[0040] 423 Nut

[0041] 5 Motor System

[0042] 51 Motor

[0043] 511 Motor Shaft

[0044] 52 Gearbox

[0045] 521 Gear Set

[0046] 522 Output Shaft

[0047] 6 Rear Wheel

[0048] 7 Control System

[0049] 81 Intake System

[0050] 811 Air Filter

[0051] 812 Intake Pipe

[0052] 82 Exhaust System

[0053] 821 Muffler

[0054] 822 Front Exhaust Pipe

[0055] 83 Rear Shock Absorber

[0056] b1 First Bearing

[0057] b2 The second bearing

[0058] b3 The third bearing

[0059] R Integral rocker arm structure Specific embodiments

[0060] Please refer to Figures 1 to 3 , which are respectively the side view, top view and partial sectional view of an electric motorcycle according to a preferred embodiment of the present utility model. An electric motorcycle 1 is shown in the figure, mainly including a frame 2, a battery 3 (as Figure 4 shown), a power generation system 4, a motor system 5, a rear wheel 6, a control system 7 (as Figure 4 shown), an intake system 81, an exhaust system 82 and a rear shock absorber 83.

[0061] In this embodiment, the battery 3 is an aluminum battery, which is carried on the frame 2 and located above the power generation system 4. The aluminum battery has excellent fast charge and discharge performance. However, the present utility model is not limited thereto, and the battery 3 can be replaced with various rechargeable batteries according to requirements, and the placement position of the battery 3 can be adjusted according to requirements. In addition, the power generation system 4 is connected to the frame 2 and disposed on the left side of the vehicle body, including an engine 41 and a power generation device 42. The engine 41 includes a cylinder head 411, a cylinder 412, a piston 413, a connecting rod 414, a crankshaft 415, an engine housing 416 and a housing outer shell 417. The crankshaft 415 extends to the left side of the vehicle body and is connected to the power generation device 42. The connecting rod 414 is connected to the crankshaft 415 and a piston 413 is assembled thereon. The engine housing 416 covers the crankshaft 415, and is provided with a first bearing b1 and a second bearing b2 and has a connecting portion 416a extending to the rear of the vehicle body. The housing outer shell 417 is connected to the engine housing 416 and is provided with a third bearing b3. Among them, the crankshaft 415 is respectively passed through and supported in the first bearing b1, the second bearing b2 and the third bearing b3, so that the crankshaft 415 has sufficient structural support, and the engine housing 416 is connected to a motor 51 of the motor system 5 by the connecting portion 416a. The power generation device 42 is accommodated in the accommodation space covered by the engine housing 416 and the housing outer shell 417, including a stator 421 and a rotor 422. The stator 421 is locked to the engine housing 416, and the rotor 422 is sleeved on the end of the crankshaft 415 and is tightened to the crankshaft 415 by a nut 423. In this embodiment, the power generation system 4 and the motor system 5 are consolidated into an integral rocker arm structure R through the connecting portion 416a, and the frame 2 is connected to the integral rocker arm structure R by a rear shock absorber 83, so as to support the weight of the vehicle body and the user and buffer the impact of the motorcycle driving on the road surface.

[0062] The motor system 5 is disposed on the left side of the vehicle body and includes a motor 51 and a gearbox 52. The motor 51 has a motor shaft 511. The gearbox 52 has a gear set 521 and an output shaft 522. The gear set 521 meshes with the motor shaft 511 and the output shaft 522 respectively, and the rear wheel 6 is fixed to the output shaft 522. In this embodiment, the motor 51 is a side-mounted motor, which has advantages such as high output power, simple structure, and convenient maintenance. In addition, the control system 7 is located behind the battery 3, but it is not limited thereto, and the placement position of the control system 7 can be adjusted according to requirements. The intake system 81 is located above the power generation system 4 or the motor system 5 and includes an air filter 811 and an intake pipe 812. The air filter 811 is connected to the cylinder head 411 by the intake pipe 812 to filter the external air and provide the air required for the combustion of the engine 41. The exhaust system 82 is located on the opposite side of the power generation system 4 or the motor system 5, that is, the exhaust system 82 is disposed on the right side of the vehicle body and includes a muffler 821 and a front exhaust pipe 822. The muffler 821 is connected to the cylinder head 411 by the front exhaust pipe 822 to guide the exhausted gas after combustion to the muffler 821, and the exhausted gas is discharged to the atmosphere after expansion and noise reduction.

[0063] Please refer to Figure 4 , which is a system architecture diagram of an electric motorcycle according to a preferred embodiment of the present invention. Among them, the control system 7 is electrically connected to the battery 3, the power generation system 4, and the motor system 5 respectively. The power generation device 42 is connected to the engine 41 and electrically connected to the battery 3, and the motor system 5 is electrically connected to the battery 3. Therefore, when the engine 41 is started, the crankshaft 415 of the engine 41 rotates synchronously with the rotor 422 of the power generation device 42, so that the rotor 422 of the power generation device 42 and the stator 421 generate relative rotational motion to generate electricity, and the generated electricity is stored in the battery 3. Then, the battery 3 provides power to drive the motor system 5, so that the power is transmitted from the motor shaft 511 of the motor 51 to the output shaft 522 after being decelerated by the gear set 521 in the gearbox 52, and the output shaft 522 rotates synchronously with the rear wheel 6, thereby driving the electric motorcycle 1 to travel. In this embodiment, the control system 7 is used to control the opening and closing of the engine 41, the charging and discharging of the battery 3, and the power output.

[0064] Through the above design, the electric motorcycle of the present utility model adopts an extended-range power architecture. When the battery 3 has insufficient power storage, the engine 41 can be started to generate electricity and store the power, so as to increase the riding endurance and solve the problem of range anxiety. In addition, the electric motorcycle 1 is driven by the motor 51, so it can retain the advantages of strong starting acceleration, stable driving, and low noise of the electric motorcycle. The engine 41 is only used for generating electricity and is not directly driven, so the operating conditions are simple and controllable, and the engine operation settings and related designs of engine parts can be optimized. Furthermore, the engine 41 operates in the block with the best thermal efficiency, and the overall thermal efficiency is relatively high. Even if the user does not charge the battery 3 additionally, it has better fuel economy than fuel motorcycles, can further reduce the overall gasoline consumption, and lower the usage cost.

[0065] On the other hand, since the power of the electric motorcycle 1 can be charged by the engine 41 generating electricity, there is no need to replace the battery 3 separately or charge the battery 3 with an external power source, so the usability can also be increased. Therefore, the electric motorcycle 1 of the present utility model can improve the product commerciality, and as one of the selling points of the product, it can meet the all-round usage needs of consumers.

[0066] The above embodiments are only examples for convenience of description. The scope of the rights claimed by the present utility model shall be subject to the scope described in the patent application documents for protection, rather than being limited to the above embodiments.

Claims

1. An electric motorcycle, characterized in that: Included are: A frame; a battery carried on the frame; a power generation system connected to the vehicle frame, comprising an engine and a power generation device connected to the engine, the power generation device being electrically connected to the battery, the engine comprising a cylinder head, a cylinder, a piston, a connecting rod, a crankshaft and an engine case covering the crankshaft, the power generation device comprising a stator and a rotor, the stator being locked on the engine case, the rotor being sleeved on the end of the crankshaft so that the rotor and the crankshaft rotate synchronously; a motor system, electrically connected to the battery, comprising a motor and a gear box, the motor having a motor shaft, the gear box having a gear set and an output shaft, the gear set meshing with the motor shaft and the output shaft respectively, so that power is transmitted from the motor shaft to the output shaft after being reduced in speed; a rear wheel fixed to the output shaft so that the rear wheel rotates synchronously with the output shaft; and A control system is electrically connected to the battery, the power generation system and the motor system respectively.

2. The electric motorcycle according to claim 1, characterized in that: The engine also includes a casing shell connected to the engine casing, and the power generation device is accommodated in an accommodating space surrounded by the engine casing and the casing shell.

3. The electric motorcycle according to claim 2, characterized in that: The engine case is provided with a first bearing and a second bearing, the case shell is provided with a third bearing, and the crankshaft is respectively passed through and supported in the first bearing, the second bearing and the third bearing.

4. The electric motorcycle according to claim 1, characterized in that: The invention also comprises an air intake system, which comprises an air filter. The air filter is connected to the cylinder head via an air intake pipe, and the air intake system is located above the power generation system or the motor system.

5. The electric motorcycle according to claim 1, characterized in that: The invention also comprises an exhaust system, which comprises a muffler connected to the cylinder head via an exhaust pipe front pipe, and the exhaust system is located at the opposite side of the power generation system or the motor system.

6. The electric motorcycle according to claim 1, characterized in that: The engine case has a connecting portion, and the engine case is connected to the motor via the connecting portion.

7. The electric motorcycle according to claim 6, characterized in that: The power generation system and the motor system are fixed to form an integral rocker arm structure via the connecting portion.

8. The electric motorcycle according to claim 7, characterized in that: The vehicle frame also includes a rear shock absorber, and the vehicle frame is connected to the integral rocker arm structure via the rear shock absorber.

9. The electric motorcycle according to claim 1, characterized in that: The battery is located above the power generation system, and the control system is located behind the battery.

10. The electric motorcycle according to claim 1, characterized in that: The rotor is tightened to the crankshaft by a nut.

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