1. Rack: The main structure carrying the press-fitting unit, usually made of steel, with sufficient strength and rigidity.

2. Press-fitting head: a device that applies pressure, usually consisting of a hydraulic cylinder, a piston and a connecting rod. The design and size of the press-fitting head depend on the requirements of the press-fitting workpiece.

3. Press-fitting seat: used to support and fix the press-fitted workpiece, usually made of steel plate, with sufficient strength and stability.

4. Hydraulic system: providing the hydraulic pressure required by the press-fitting head, including hydraulic oil tank, hydraulic pump, hydraulic valve, oil pipe, etc.

5. Control system: a system used to control the press-fitting process, including servo controllers, sensors, electrical components, etc. The control system can adjust the pressure and time according to the requirements of the press-fitted workpiece.

6. Safety device: used to ensure the safety of operators and equipment, including protective cover, safety switch, emergency stop button, etc.

7. Auxiliary equipment: according to the needs of press-fitting process, some auxiliary equipment can be equipped, such as pressure sensor, temperature sensor, hydraulic cylinder adjusting device, etc.

The above are the main components of the press-fitting unit structure of servo press, and the specific structure and configuration of different press-fitting units may be different.