There are several ways to connect a planetary gearbox and a motor. Here are some possible methods:

Flange connection: The planetary gearbox and motor can be connected together through a flange connector. The flange is typically a circular metal piece bolted or screwed to the end faces of the motor and gearbox. This type of connection is usually sturdy and reliable, suitable for larger machines.

Direct connection: The output shaft of the planetary gearbox and input shaft of the motor can be directly connected together, which typically requires some additional components to ensure the connection's strength and precision. This type of connection is relatively simple and suitable for smaller machines.

Coupling connection: A coupling is a component that connects the motor and planetary gearbox and can compensate for axial deviation, angular deviation, and torque impact issues. This type of connection is suitable for machines that require high precision and reliability.

Gear connection: The planetary gearbox and motor can be connected together through a gear connector, which is suitable for machines that require large reduction ratios and high torque output.

The appropriate connection method should be selected based on the specific application and machine design.