When using electric pallet trucks, many users focus on battery life, motor performance, and rated load, but rarely pay attention to the working condition of the wheels.
Then, many users find during equipment maintenance that the wear rates of the drive wheels and load-bearing wheels are not entirely the same. Sometimes the drive wheels wear more noticeably, while under certain operating conditions, the load-bearing wheels may wear out prematurely. So, what exactly is the difference between these two types of wheels? Why do their wear patterns differ?
- Electric pallet trucks typically use both drive wheels and load-bearing wheels to complete driving and handling operations. Although both support the entire vehicle, their design functions are different. The drive wheels are generally connected to the drive motor, responsible for transmitting power to the ground, enabling the vehicle to start, move, decelerate, and, in some models, turn; the load-bearing wheels are installed near the front of the forks, mainly used to support the weight of the goods, allowing the pallet to move smoothly. From the initial design, the force distribution between the two is significantly different.
- In addition to bearing part of the vehicle's weight, the drive wheels also need to continuously output traction. Every start, acceleration, deceleration, and braking generates friction between the drive wheels and the ground. When a vehicle starts fully loaded, greater torque is required to overcome the inertia of the goods, increasing the contact stress between the drive wheels and the ground. If frequent starts, stops, turns, or reversing are required within the warehouse, this friction is repeated continuously. In many high-frequency operational scenarios, drive wheels are more prone to wear.
- The primary task of the load-bearing wheels is to withstand the vertical load from the goods and forks, ensuring smooth vehicle rolling. Under normal circumstances, they are not responsible for outputting driving force. The wheel surface bears more rolling resistance and ground impact than driving friction. However, this does not mean that load-bearing wheels are necessarily more wear-resistant. If operating for extended periods in environments with uneven surfaces, thresholds, expansion joints, or potholes, load-bearing wheels will continuously wear down. If the equipment is frequently overloaded, the pressure on the load-bearing wheels and their bearings will also increase significantly, accelerating wear.
- Besides the different load-bearing methods, the wheel material also affects the wear rate. Currently, common wheel materials for electric pallet trucks include polyurethane, nylon, and rubber.
- Polyurethane wheels are widely used in indoor warehousing and logistics operations due to their good wear resistance, low rolling resistance, and low operating noise.
- Nylon wheels have higher hardness and are suitable for flat surfaces and heavy loads.
- Rubber wheels have good shock absorption performance and are still used in some special environments.
Different materials have different applications; no single material is suitable for all conditions. Therefore, the appropriate material should be selected based on ground conditions, load size, and frequency of use.
- It is important to note that it cannot be simply assumed that drive wheels always wear faster than load-bearing wheels. In the warehousing and logistics industry, drive wheels, because they bear the power output, are often the first parts to be replaced. However, the specific wear is also affected by various factors such as load, road conditions, operating habits, wheel material, and daily maintenance. Frequent rapid acceleration, sudden braking, turning on the spot, or prolonged operation on rough surfaces will increase the wear of drive wheels. Overloading, large ground impacts, or insufficient axle lubrication may cause load-bearing wheels to wear out earlier.
Therefore, in daily maintenance, it is better to regularly inspect the entire running system rather than focusing on just one wheel. Meanwhile, prolonged overloading should be avoided, and smooth starts and braking should be maintained as much as possible. Keeping the working surface flat and clean will also help extend the service life of the wheels and the entire vehicle.
