关键词: 助力机械手；重卡钣金件；人机协同；柔性搬运；劳动强度

Abstract: Aiming at the problems of low efficiency, high labor intensity (requiring two-person coordination), and high safety risks in the manual handling of large sheet metal parts for the front wall of heavy-duty truck cabs, this paper designs a mobile electrically controlled assist manipulator. Based on CATIA software, a lightweight structural design is completed. Adopting a human-armimitating architecture, an innovative embracing lifting and clamping mechanism is proposed to adapt to irregular surfaces, achieving three-point force application. An integrated lead screw and worm gear reduction system is used to achieve thrust amplification and self-locking upon power failure, combined with a four-wheel mobile system to overcome spatial limitations. Application results show that the manipulator, operated by a single person, can handle the front wall assembly in any direction,eliminating direct contact between the worker and the part, thereby enhancing operational safety and reducing labor costs by 50%. This assist manipulator provides a low-cost, highly flexible solution for handling heavy and irregular sheet metal parts in the automotive manufacturing industry, filling the gap in specialized handling equipment for such components in heavy-duty trucks. It can be promoted to the machinery manufacturing sector, supporting flexible and cleaner production line upgrades.

Key words: assist manipulator; sheet metal parts of heavy-duty trucks; human-robot collaboration; flexible handling; labor intensity