In mechanical terminology, a bogie refers to a structural framework that supports and carries the wheels connected to coaches. In the United States, the bogie is commonly referred to as a "truck." Bogies come in various configurations and dimensions, but they are most advanced in their design when incorporated as a motor bogie in electric or diesel locomotives, or in an EMU (Electric Multiple Unit). In this context, the bogie is responsible for accommodating the motors, brakes, and suspension systems within a compact space. It is subjected to significant stresses and shocks, and it may need to operate at speeds exceeding 300 km/h in high-speed applications.


Bogie Frame:

• Frame for bogie
• Chassis for bogie

Bogie Transom:

• Crossbeam of bogie frame
• Transverse support member of bogie frame

Brake Cylinder:

• Brake actuator
• Brake piston

Primary Suspension Coil:

• Main suspension spring
• Primary coil spring

Motor Suspension Tube:

• Motor hanger tube
• Suspension tube for motor

Gearbox:

• Transmission box
• Drive mechanism

Motor:

• Electric motor
• Engine

Neutral Section Switch Detector:

• Current switch detector
• Neutral section crossing detector

Secondary Suspension Air Bag:

• Air cushion for secondary suspension
• Rubber air suspension bag

Wheel Slide Protection System Lead to Axlebox:

• WSP sensor connection to axlebox
• Axlebox speed sensor linkage for WSP system

Shock Absorber (Damper):

• Vibration dampener
• Suspension shock absorber

Axlebox Cover:

• Cover for axlebox
• Axle bearing protection cover