Large instrument cases can weigh tens of kilograms when fully loaded, making hand-carry impractical. Trolley and wheel design directly affects transport efficiency and safety. KeXin pays special attention to trolley and wheel selection in large protective case design.

Trolley Types and Selection

Common trolleys include built-in telescopic trolleys and external trolleys. Built-in trolleys are stored in internal grooves, saving space and maintaining a clean appearance. KeXin Series 8 large cases use high-strength aluminum alloy built-in trolleys with strong load capacity and smooth extension. External trolleys are mounted on the back of the case, often used for oversized or special-shaped cases. They offer longer travel and simpler structure, but take up space and look less streamlined.

Wheel Types and Selection

Wheels directly affect how smoothly and quietly a case moves. Fixed wheels have a simple structure, only move straight, and are low cost. Swivel casters rotate 360° for high flexibility in narrow spaces. Brake casters have locking devices to prevent sliding on slopes or during transport. Silent wheels are made of TPU or rubber to reduce noise and floor wear. KeXin recommends brake-equipped silent swivel casters for flexibility, safety, and user experience.

Load Capacity and Layout

Trolley and wheel mounting positions must match the case's center of gravity. An offset center of gravity causes the case to tilt while pulling, increasing difficulty. KeXin performs center-of-gravity calculations and real-world pulling tests on large instrument cases to ensure stable handling even when fully loaded.

Maintenance

  • Regularly check trolley extension for smoothness and remove dust and debris
  • Check wheel bearings for looseness and tighten or replace as needed
  • Avoid dragging on extremely rough terrain for long periods to prevent wheel damage
  • Retract the trolley and lock wheel fixtures when not in use for long periods

    • Recommended Solution

    KeXin Series 8 large cases come standard with high-strength aluminum alloy trolleys and brake-equipped silent swivel casters, suitable for large instruments, communication equipment, and tactical gear.