A tracked vehicle is a type of vehicle that uses tracks as its walking device, and its walking transmission principle mainly includes the following parts:

1. Drive wheels: The drive wheels of tracked vehicles are usually located at the front or rear of the vehicle. The driving wheels transmit the power of the engine to the tracks through a reducer. There are transmission components such as gears and chains inside the driving wheels, which convert power into linear motion of the tracks.

2. Track: Track is the main component of a tracked vehicle, usually made of metal or plastic. There are many small gears on the track, which mesh with the gears inside the drive wheels, allowing the track to roll smoothly on the ground. Both sides of the track usually have rubber or other material track plates to reduce pressure on the ground and prevent the vehicle from getting stuck on the ground.

3. Tensioning device: In order to ensure that the track always maintains a certain tension, a tensioning device is usually installed on the tracked vehicle. The tensioning device can change the tension of the track by adjusting the bolts to adapt to different terrains and loads.

4. Steering mechanism: The tracked vehicle needs to achieve steering function during driving. The steering mechanism typically includes an independent drive wheel and sprocket system, as well as a set of lateral support wheels for controlling track movement. By controlling the speed of the drive wheel and sprocket, the steering of the tracked vehicle can be achieved.

5. Braking system: Tracked vehicles need to have a certain braking ability to prevent loss of control on steep slopes and other terrains. The braking system of tracked vehicles usually includes components such as hydraulic brakes and brake pads, which can effectively stop the vehicle's movement.

In short, the walking transmission principle of tracked vehicles is to work together through components such as drive wheels, tracks, tensioning devices, steering mechanisms, and braking systems to convert the power of the engine into the driving force for the tracks to travel smoothly on the ground. This walking method enables tracked vehicles to have good passability and stability on various complex terrains.