A bogie is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transport. A bogie may remain normally attached or be quickly detachable. It may include a suspension component within it, or be solid and in turn be suspended ; it may be mounted on a swivel, as traditionally on a railway carriage or locomotive, additionally jointed and sprung, or held in place by other means.
A railway bogie
Experiment, the first successful American locomotive with a bogie, built in 1831 to a design by civil engineer John B. Jervis
Japanese archbar bogie with axleboxes
Diamond frame bogie, elliptical springs and American style journal boxes
A chassis is the load-bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis.
The CTC-2 chassis of an RCA CT-100 television
Motor vehicle chassis with its suspension, exhaust system, and steering box
An ATX computer case