Patent ID: 7540195

Claim:
An electro-shaker vehicle test stand for evaluation of a vehicle comprising: a support frame; an electro-shaker mechanism; a lever arm disposed between said electro-shaker mechanism and said support frame, wherein said lever arm has an adjustable length and a first end of said lever arm is connected to said electro-shaker mechanism and a second end of said lever arm is connected to said support frame utilizing a bracket; a spring table having a spring table plate and a spring table frame that is parallel to and spaced a predetermined distance below said spring table plate, a guide rod having a lower end attached to said spring table frame and an upper end attached to said spring table plate; and a spring having an upper end attached to said support frame and a lower end attached to said spring table frame, wherein activation of said electro-shaker mechanism induces an oscillatory movement of said spring in a vertical direction, so that said spring table and vehicle are correspondingly displaced in a vertical direction.