The bogie primarily employs a welded frame construction. The frame assembly comprises two side beams, two cross beams, and one center beam. Two rigid side bearings are installed on either side of the frame. The wheelset adopts monoblock silicon steel wheels fitted with self-aligning roller bearings, while the suspension system features three-stage spring stiffness characteristics. The interface components connecting the bogie to the carbody are manufactured from non-metallic materials including nylon and rubber.

• What type of frame structure does the bogie adopt?
  The bogie mainly adopts a welded frame structure composed of two side beams, two cross beams, and one center beam.
• What materials and bearing types are used for the wheels?
  The wheels are monoblock silicon steel wheels equipped with self-aligning roller bearings.
• What materials are used for the connecting parts between the bogie and the vehicle body?
  The connecting components are made of non-metallic materials such as nylon and rubber.