Design and Fabrication of a Simplified Motorized Scissor Jack with Load-Adaptive Drive

The scissor jack is a commonly used lifting device for vehicles, but conventional manually operated jacks require significant physical effort and time. This paper presents the design and fabrication of a simplified motorized scissor jack powered by a 12 V DC supply. The proposed system eliminates manual effort and provides safe, smooth, and controlled lifting. A load-adaptive motor drive concept is introduced to improve efficiency and reduce motor stress during lifting. Design calculations for the power screw, motor selection, and lifting members are carried out. Experimental testing is performed under different loading conditions, and the results demonstrate reliable lifting up to 2 tones. The developed system is economical, compact, and suitable for diploma-level engineering applications.