Application guide for electric hub motor lubrication

With the popularization of electric vehicles, hub motors, as one of the mainstream motors, are widely used in the power systems of electric vehicles. Among them, high-speed brushless geared hub motors are favored by various industries due to their advantages in terms of load and torque. In this article, we will provide you with a guide to the lubrication application of electric vehicle hub motors to help you better maintain and care for electric vehicle hub motors.

Types and advantages of hub motors

There are two main types of electric vehicle hub motors: brushless gearless hub motors and brushless geared hub motors. Compared with brushless gearless hub motors, electric vehicles fitted with brushless hub motors have significant advantages in terms of speed, load, and hill climbing. However, because of the gears inside the geared hub, the geared hub motor is noisier, has a higher operating temperature, and the gears wear out more easily than the brushless gearless hub motor. Therefore, lubrication plays an important role in reducing gear friction between geared hub motors.

Gear materials for hub motors

In a hub motor, gears, and bearings are the main parts that need lubrication. The gear materials of brushless geared hub motors mainly include all-nylon gears, all-steel gears, nylon teeth with steel gears and nylon teeth with metallurgical powder gears. Among them, all-nylon gears have the lowest noise but lower bearing capacity; all-steel gears have the highest bearing capacity but higher noise; nylon teeth with steel gears and nylon teeth with metallurgical powder gears synthesize the advantages of the two, but the price is higher.

Lubrication of wheel motors

Since it is difficult to refill grease after the wheel motor is manufactured, many manufacturers require wheel motors to be lubricated for life. In the process of use, if you need to replace the lubricating grease, it is recommended to use the lubricating grease recommended by the manufacturer and lubricate according to the lubrication period and amount provided by the manufacturer. The basic requirements of hub motor grease are temperature reduction, noise reduction, resistance to high and low temperatures, long service life, and a certain degree of adhesion to enable the gears to always maintain grease lubrication in the case of high speed without being thrown off. If the gear with nylon and other plastic materials, should also consider the rubber-plastic compatibility of the grease, whether it will produce corrosion of plastic parts.

Precautions for wheel motor lubrication

When lubricating the hub motor, the following points should be noted:

1. Before lubrication, the surface of the hub motor and the inside of the hub motor should be cleaned of debris and dirt to ensure the effectiveness of the lubricating grease.
2. Too much or too little lubricating grease will affect the operating effect of the hub motor, which should be lubricated according to the lubricating quantity provided by the manufacturer.
3. During the operation of the hub motor, the status of the lubricating grease should be checked regularly, and the lubricating grease should be replaced in time if there is any abnormality.

Conclusion

The hub motor is an important part of the electric vehicle, the correct lubrication method and cycle have an important impact on the operating effect and life of the hub motor. Through the hub motor lubrication application guide provided in this article, we believe you can better maintain and care for your hub motor to ensure its efficient and reliable operation.