The essence of the panel board flat rod catcher is to build a dynamic constraint system. Its basic principle is to achieve the positioning and locking of the flat rod by storing and releasing deformation energy. The elastic clamping structure of the panel board flat rod catcher adopts a hyperbolic contact surface design, so that the normal contact stress distribution forms a conjugate match with the flat rod deflection curve.
In terms of material selection, the cold-rolled spring steel is treated with a residual stress regulation process to make the panel board flat rod catcher stable under cyclic load. The diamond-like carbon film layer formed by the surface microstructure treatment reduces the friction coefficient to 0.12, ensuring the smoothness of the panel board flat rod catcher insertion process and the balance of the static friction threshold in the clamping state.
The innovative function of the panel board flat rod catcher is reflected in the three-degree-of-freedom constraint strategy, namely, the axial sliding is limited by the inverted tooth ratchet mechanism, the radial offset is eliminated by the V-shaped guide groove, and the circumferential rotation is suppressed by the wedge-shaped locking block. This composite restraint system enables the displacement amplitude attenuation rate of the panel board flat rod catcher under dynamic conditions to reach 92%, which is greatly improved compared to traditional fixing methods.
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