I. Core Differences in Steering Structure

1. Steering of Wheeled ExcavatorStructure: steering wheel → steering gear → steering cylinder → tie rod → front wheel deflection

Principle: similar to a car, steering is achieved by changing the wheel angle.

Modes: front-wheel steering / four-wheel steering / crab steering

Features: equipped with steering axle, steering system and suspension; steering logic suitable for road driving.

2. Steering of Crawler ExcavatorStructure: two independent left and right tracks, no steering wheels, no steering axle.

Principle:

• One track moves, the other stops → turning

• One track forward, the other reverse → pivot steering

Features: steering by speed difference or direction difference, not by wheel deflection.

II. Advantages of Wheeled Steering over Crawler Steering

• Safer and more controllable on roads: smooth and linear steering, suitable for road driving, transfer and long-distance movement.

• Higher driving speed, no body swing during steering: crawler excavator tends to “drag and slide” when turning, while wheeled steering is smoother and allows higher speed.

• More in line with driving habits: operated by steering wheel, easy to learn with low labor intensity.

• More flexible on site (with four-wheel / crab steering): able to move sideways in narrow roads, near walls or containers, which crawler excavator cannot do.

• Less damage to road surface: crawler steering grinds and damages the road surface, while wheeled excavator hardly harms it.

One-sentence summary for memorization

Wheeled excavator steers by wheel deflection like a car, with advantages of fast road travel, smooth control, no road damage and strong transfer capability; crawler excavator steers by left-right track speed difference, with advantages of pivot turning and no skidding on soft ground.