Double-Layer Shaft Linkage Technology
Chongqing Saiyang Fire Equipment Co., Ltd. obtained a patent in April 2026 (CN224107191U), using a single servo motor to drive two shafts to rotate synchronously, reducing the number of motors, lowering manufacturing costs, and using tension sprockets to prevent chain slippage, thereby improving transmission efficiency and accuracy.
Quick Open-Close Mechanism
Tiantong Metal Products Co., Ltd. (patent authorized in March 2026, CN224064254U) developed a quick open-close rolling shutter suitable for fire trucks, achieving fixed pull-down and automatic roll-up through an inclined limit block and spring mechanism, featuring a simple structure and strong practicality.
Explosion-Resistant Structural Design
Explosion-resistant rolling shutters adopt a 'sandwich' structure: outer back panel + 55mm thick core panel (including a 3.0mm iron anti-collision beam) + inner surface panel, connected with multi-strand rivets (20mm spacing), significantly enhancing impact resistance.