The rear axle of a truck, also known as the rear differential, is a critical component for stable and flexible vehicle operation. This article by Xe Tải Mỹ Đình will help you understand the structure, function, and types of rear axles common on the market.
Rear axle of a truck
Role of the Truck Rear Axle
The main task of the truck’s rear axle is to transfer power from the engine to the rear wheels, allowing them to rotate at different speeds when the vehicle turns. This allows trucks to move easily and safely through tight corners, reducing dangerous wheel slip.
The differential inside the rear axle splits the torque into two streams, helping the two rear wheels rotate at different speeds when needed. This is especially important when the vehicle is moving on a curve, ensuring that the outer wheel rotates faster than the inner wheel, helping the vehicle corner smoothly and stably. In addition, the rear axle also acts as the final step in the reduction gear mechanism, helping to increase torque to the wheels.
Structure of a truck rear axle
Detailed Structure of the Truck Rear Axle
The truck’s rear axle is made up of many parts, including:
- Differential: Allows the two rear wheels to rotate at different speeds, ensuring stable vehicle movement when cornering.
- Final Drive: Reduces the number of revolutions and increases torque to the wheels.
- Differential Housing: Protects the internal components from dirt and impact.
- Drive and Driven Gears: Transmit power from the engine to the wheels.
- Axle Gears: Connect the differential to the axle shafts.
- Axle Shafts: Transmit power from the axle gears to the wheels.
Types of Truck Rear Axles
Currently, there are two common types of truck rear axles: full-floating axles and semi-floating axles.
Full-Floating Axle
Full-floating axles are the most common type of rear axle, often used for box trucks. The advantage of a full-floating axle is that it helps the vehicle accelerate faster and saves fuel. However, full-floating axles are more likely to break when the vehicle is traveling on steep roads or rough terrain.
Full-floating axle
Semi-Floating Axle
Semi-floating axles have better torsional strength and load capacity than full-floating axles, and are often used for dump trucks and tractor trucks. The advantage of semi-floating axles is that they operate stably on rough terrain and can withstand heavy loads. However, semi-floating axles consume more fuel than full-floating axles.
Semi-floating axle
Distinguishing Between Semi-Floating and Full-Floating Axles
You can distinguish between semi-floating and full-floating axles by observing the flange on the wheel hub:
- Semi-floating axle: The flange is larger and has an oil filling hole and seal.
- Full-floating axle: The flange is smaller and does not have a lubricating oil filling hole.
Conclusion
The truck’s rear axle is an important part that affects the vehicle’s operating capacity and durability. Understanding the structure, function, and classification of the rear axle will help you choose the right truck for your needs. Contact Xe Tải Mỹ Đình for more detailed advice on truck lines and rear axles suitable for your transportation needs.
