| 摘要 |
PURPOSE:To achieve high deformability while to suppress variation of shearing spring factor of spring structure where circular rubber boards and metal boards are laminated alternatively and integrated by setting the thickness, diameter, total thickness and hardness of rubber board respectively to specific values. CONSTITUTION:Spring structure 3 is constructed by laminating a plurality of metal boards 1 and rubber boards 2 alternatively. Here, the characteristic of spring structure 3 is determined by hardness, resiliency of rubber, ratio D/t between the thickness (t) of single layer of rubber board 2 and the diameter D (primary shape factor), ratio D/h (secondary shape factor) between the total thickness (h) of rubber board 2 and the diameter D, etc. Here, said dimensions are set such that t>=5mm., D/t>=50, D/h<=5, while the hardness of rubber board 2 is set lower than 40. Consequently, high deformability is achieved and a spring having shear spring factor only slightly variable upon variation of vertical load can be obtained. |
