Patent ID: 7681858

Claim:
A preloading and flex resistant support board for a mechanical machine comprising: a support board body being radially formed with at least one preloading groove in one side thereof, the preloading groove being provided with a resisting surface on each of two opposite ends thereof; and at least one preloading bar disposed in the preloading groove of the support board body, the preloading bar being provided with a resisting surface on each of two opposite ends thereof to resist against the resisting surfaces of the preloading groove; wherein the preloading groove is formed with at least one support groove, the preloading bar is formed with at least one limiting hole, a screw is screwed in the limiting hole of the preloading bar and the support groove of the preloading groove to make the resisting surfaces of the preloading groove resist against the resisting surfaces of the preloading bar tightly; each of the two resisting surfaces of the preloading groove has a virtual mid-point, and the two virtual mid-points of the two resisting surfaces of the preloading groove define a virtual line, which intersects with each of the two resisting surfaces of the preloading groove to define a first angle and a second angle, each of the two resisting surfaces of the preloading bar has a virtual mid-point, and the two virtual mid-points of the two resisting surfaces of the preloading bar define a virtual line, which intersects with each of the two resisting surfaces of the preloading bar to define a first angle and a second angle.