CN202557315U - Range-extender device for electric automobiles - Google Patents

Abstract

The utility model proposes a range extender device for electric vehicles, which belongs to the field of electric drive technology. The range extender device includes an engine, a torsional shock absorber, a generator; a flywheel of the engine and a driven plate of the torsional shock absorber Mechanical connection; the driven hub of the torsional vibration damper is mechanically connected to the input shaft of the generator. The torsional shock absorber is obtained by modifying the driven disc assembly of the dry clutch, and the wave spring and the friction plate in the driven disc assembly of the dry clutch are removed. By installing a range extender device in the pure electric vehicle, the mileage of the vehicle can be effectively extended, and the cost of the whole vehicle will not be increased too much, which is conducive to the popularization and use of electric vehicles. At the same time, a torsional shock absorber is added to the range extender device to avoid the resonance of the transmission system of the range extender device, ease the impact, reduce noise, and improve the life of the range extender device.

Description

A range extender device for an electric vehicle

technical field

The utility model belongs to the technical field of electric drive and relates to a range extender device for an electric vehicle, in particular to a range extender device using a torsional shock absorber.

Background technique

With the development of the traditional automobile industry, oil resources are becoming scarce and air quality is deteriorating. In this situation, electric vehicles with obvious energy-saving and environmental protection advantages have become a hot spot in the development of major automobile manufacturers and scientific research institutions in recent years. Electric vehicles are considered to be one of the effective ways to solve the problem of energy shortage and environmental pollution.

However, the development of electric vehicles at this stage still faces several major problems. One is the short driving range. On the one hand, due to the limitations of battery technology, the mileage of most pure electric vehicles is 100-200 kilometers, and it is only obtained from theoretical calculations or bench tests, which is difficult to achieve in actual operating conditions; on the other hand, the charging infrastructure The construction is still far from perfect, which greatly restricts the promotion and use of pure electric vehicles. Second, the cost of electric vehicles is high, and the most important factor affecting the cost is the battery. To increase the driving range of pure electric vehicles, batteries with high performance and capacity must be used, and the cost of electric vehicles will further increase. This has formed a contradiction between mileage and cost. Increasing the mileage will increase the cost, making the development of pure electric vehicles slow. At this time, the extended-range electric vehicle came into being. The range extender has effectively extended the mileage of pure electric vehicles, and at the same time effectively limited the increase in cost, and the range extender has become another research hotspot in the field of electric vehicles. At present, small piston engines are mostly used in range extenders, and the power output of piston engines fluctuates periodically due to the reciprocating motion of the piston. System resonance or premature fatigue failure.

Contents of the invention

Aiming at the problems existing in the prior art, the utility model proposes a range extender device for electric vehicles. By installing a range extender device in a pure electric vehicle, the mileage of the vehicle can be effectively extended, and the vehicle's The cost will not increase too much, which is conducive to the popularization and use of electric vehicles. At the same time, a torsional shock absorber is added to the range extender device to avoid the resonance of the transmission system of the range extender device, ease the impact, reduce noise, and improve the life of the range extender device.

The utility model proposes a range extender device for an electric vehicle. The range extender device includes an engine, a torsional shock absorber, and a generator; the engine flywheel of the engine is mechanically connected with the driven piece of the torsional shock absorber; The driven hub of the vibrator is mechanically connected to the input shaft of the generator. The torsional shock absorber is modified on the basis of the driven plate assembly of the dry clutch, the wave spring and the friction plate in the driven plate assembly of the dry clutch are removed, and at the same time, the driven plate is enlarged The size of the dry clutch disc assembly retains the remaining structural original components.

The utility model has the advantages of:

1. This utility model proposes a range extender device for electric vehicles, which introduces a backup power source into the pure electric vehicle, greatly improving the mileage of the electric vehicle, and at the same time effectively limiting the increase in vehicle cost;

2. The utility model proposes a range extender device for electric vehicles, the engine working condition is single, and the engine operating point is optimized to improve efficiency and reduce emissions.

3. The utility model proposes a range extender device for electric vehicles. A torsional shock absorber is used in the power system, which reduces fluctuations in the power transmission process, avoids resonance in the transmission system of the range extender device, eases the impact, and reduces Noise, improve the life of the range extender device.

4. This utility model proposes a range extender device for electric vehicles. The torsional shock absorber used is obtained by removing the wave spring and friction plate in the driven plate assembly of the traditional dry clutch of a vehicle, which greatly shortens the development time. cycle, reducing the cost of system development.

5. The utility model proposes a range extender device for electric vehicles, which can solve the cooling and heating problems of electric vehicles, and can be used for power supply in emergency situations.

Description of drawings

Figure 1: A schematic structural diagram of a range extender device proposed by the utility model;

Figure 2: a schematic structural view of a range extender device proposed by the utility model;

Figure 3: Schematic diagram of the structure of the driven disc assembly of the dry clutch in the prior art;

Figure 4: Schematic diagram of the structure of the improved torsional shock absorber in the utility model.

In the figure: 1-engine; 2-engine flywheel; 3-torsional damper; 4-generator;

5-Friction plate; 6-Wave spring; 7-Follower hub; 8-Follower plate.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing.

The utility model proposes a range extender device for an electric vehicle, as shown in FIG. 1 , which mainly includes an engine 1 , a torsional shock absorber 3 and a generator 4 .

Described engine 1 is traditional internal combustion engine, as gasoline engine, diesel engine or other fuel engines, is the main power source of range extender device, as shown in Figure 2, the driven plate of engine flywheel 2 of engine 1 and torsional damper 3 mechanical connection.

The torsional damper 3 transmits the power of the engine 1 to the generator 4, the driven plate 8 of the torsional damper 3 is mechanically connected with the engine flywheel 2 of the engine 1, the driven hub 7 of the torsional damper 3 and The input shaft of the generator 4 is mechanically connected.

The structure of the traditional dry clutch driven disc assembly is shown in Figure 3. The structure of the dry clutch driven disc assembly includes a friction plate 5, a wave spring 6, a driven plate 8, a damping spring, and a damping disc , damping friction plate, limit pin and driven disk hub 8 and other parts, specifically as shown in Figure 3. The torsional shock absorber 3 in the utility model is modified on the basis of the traditional automobile dry clutch driven disk assembly, and the wave spring 6 and the friction plate 5 in the traditional automobile clutch driven disk assembly are removed, Increase the size of the driven plate 8, and retain the remaining structural original components in the traditional automobile clutch driven disc assembly, including damping springs, damping discs, damping friction plates, limit pins, driven disc hub 8, etc. , its structure is specifically shown in Figure 4. Since these components are all existing mature components, and the production process, equipment, molds, etc. are all existing mature, therefore, the development cycle of the torsional vibration The development cost of the range extender device.

The utility model provides a range extender device for an electric vehicle, which can be used in a range-extended electric vehicle. It only needs to be connected to a motor controller through a generator output cable, and there is no mechanical connection with the wheel. According to the arrangement of parts and components, the installation arrangement is carried out, so the installation arrangement is flexible.

The torsional shock absorber 3 adopts the damping structure and method in the traditional automobile dry clutch driven disc assembly, which reduces the fluctuation in the power transmission process, avoids the resonance of the transmission system of the range extender device, and eases the impact. Reducing noise can improve the life span of the range extender device.

The generator 4 is used to convert the mechanical energy from the engine 1 into electrical output.

The utility model proposes a range extender device for electric vehicles, which is used in pure electric vehicles, which can effectively extend the driving range of the vehicle, and at the same time, prevent the cost of the whole vehicle from increasing too much, which is beneficial to the promotion of electric vehicles use.

The utility model proposes a range extender device for electric vehicles. The engine 1 is a traditional internal combustion engine, which converts the chemical energy of the fuel into mechanical energy for output, and then the mechanical energy is transmitted to the torsional shock absorber 2 for vibration reduction by the torsional shock absorber 2. Finally, it is smoothly transmitted to the generator 3, and the mechanical energy transmitted by the torsional shock absorber 2 is converted into electrical energy output through the generator 3, and the electrical energy can be supplied to the electric vehicle to drive the electric vehicle.

Claims (4)

1. A range extender device for an electric vehicle, characterized in that: the range extender device includes a motor, a torsional damper, a generator; the flywheel of the engine is mechanically connected with the driven plate of the torsional damper; The driven hub of the shock absorber is mechanically connected to the input shaft of the generator. 2. A range extender device for electric vehicles according to claim 1, characterized in that: the torsional damper is obtained by modifying the driven disc assembly of the dry clutch, removing The wave spring and friction plate in the driven plate assembly of the dry clutch increase the size of the driven plate, and retain the remaining structural original components in the driven plate assembly of the dry clutch. 3. A range extender device for an electric vehicle according to claim 1, characterized in that: said engine is an internal combustion engine. 4. A range extender device for an electric vehicle according to claim 3, wherein the engine is a gasoline engine, a diesel engine or other fuel engines.

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