Decoupling mechanism and testing apparatus for large-displacement vibration tests

A vibration testing apparatus for large-displacement vibration tests, comprising a vibration exciter, a sliding table assembly and a decoupling mechanism, wherein the decoupling mechanism comprising a first transfer decoupling assembly, a rotary amplifying assembly and a second transfer decoupling assembly, wherein the first transfer decoupling assembly comprises a first transfer shaft and a first transfer main body, and the first transfer main body is axially connected to the first transfer shaft;

• the second transfer decoupling assembly comprises a second transfer shaft and a second transfer main body, and the second transfer main body is axially connected to the second transfer shaft;
• an extension direction of an axis of the first transfer shaft is the same as that of an axis of the second transfer shaft;
• the rotary amplifying assembly is connected to the first transfer shaft by means of the first transfer main body, and a first connecting shaft is arranged between the rotary amplifying assembly and the first transfer main body;
• the rotary amplifying assembly and the second transfer decoupling assembly are connected by means of the second transfer main body, and a second connecting shaft is arranged between the rotary amplifying assembly and the second transfer main body;
• and extension directions of an axis of the first connecting shaft and an axis of the second connecting shaft are the same and are perpendicular to that of the axis of the first transfer shaft or the second transfer shaft;
• the first transfer decoupling assembly is arranged on one side of a vibration exciter, and the second transfer decoupling assembly is arranged on one side of a sliding table assembly;
• and
• when in use, the first transfer decoupling assembly is fixedly connected to the vibration exciter, and the second transfer decoupling assembly is fixedly connected to the sliding table assembly;
• wherein the rotary amplifying assembly comprises a support and a transfer rod;
• the top of the support is axially connected to the transfer rod by means of a third connecting shaft;
• an extension direction of an axis of the third connecting shaft is the same as that of the axis of the first connecting shaft or the second connecting shaft;
• a first end of the transfer rod is axially connected to the first transfer main body by means of the first connecting shaft;
• and a second end of the transfer rod is connected to the second transfer main body by means of the second connecting shaft;
• a horizontal straight-line distance between the axis of the third connecting shaft and the axis of the first connecting shaft is L1, and a horizontal straight-line distance between the axis of the third connecting shaft and the axis of the second connecting shaft is L2, L1<L2;
• the third connecting shaft is arranged at the top of the support and integrally-molded with the support, and the transfer rod is provided with a third through hole running through the third connecting shaft.