Transverse load stepless amplitude modulation device of multiple bolt loosing tester

A transverse load stepless amplitude modulation device of multiple bolt loosing tester, the transverse load stepless amplitude modulation device of multiple bolt loosing tester consists of four parts:

• a transverse load stepless amplitude modulation part, a transverse load transmission part, a torque load transmission part and an axial load transmission part;
• the torque load transmission part comprises a torque arm, a speed reducer support frame, a guide rail sliding block, a bearing outer sleeve, a torque eccentric coupling, a speed reducer and a torque servo motor;
• the speed reducer support frame is fixed to a bottom plate;
• the torque servo motor is externally connected with the speed reducer;
• an output shaft of the speed reducer penetrates through the speed reducer support frame and is fixed to the speed reducer support frame;
• the output shaft of the speed reducer is connected with the torque eccentric coupling;
• the torque eccentric coupling is fixed together with the upper end surface of the bearing outer sleeve;
• the lower end surface of the bearing outer sleeve is fixed to a sliding block of the guide rail sliding block;
• a guide rail of the guide rail sliding block is fixed to the torque arm;
• one end of the torque arm provided with a hexagon socket head, which is located above a tensile plate, is sleeved on an outer hexagon of a thick plank;
• the axial load transmission part comprises a thin plank, the thick plank, a specimen bolt, a bearing cap, a thrust ball bearing), an upper clamping plate, an axial load support frame and a hydraulic rama;
• spigots of the thin plank and the thick plank are correspondingly assembled together;
• the upper end of the thick plank and a right circular hole of the tensile plate are assembled together, and the tail end of the thick plank is installed in an inner ring of the upper clamping plate;
• the bearing cap penetrates through the upper clamping plate, and clamps the thrust ball bearing between the bearing cap and the upper clamping plate;
• one end of an oil hydraulic starting lever of the hydraulic rama is placed in a cylinder on the axial load support frame, and a grappling hook on the oil hydraulic starting lever grapples the edge of the bearing cap;
• wherein the transverse load stepless amplitude modulation part comprises a second square shaft bushing, a square shaft bearing, a transverse load guide rail moving plate, a transverse load guide rail fixed base plate, a lead screw nut, a ballscrew, a servo motor coupling, a servo motor and a T-shaped sliding block the second square shaft bushing is connected with the square shaft bearing;
• the square shaft bearing is installed in the T-shaped sliding block through interference fit;
• the T-shaped sliding block is installed on the transverse load guide rail moving plate, and moves together with the transverse load guide rail moving plate;
• the transverse load guide rail moving plate can slide on the transverse load guide rail fixed base plate, and the transverse load guide rail fixed base plate is installed on the bottom plate;
• the T-shaped sliding block is connected with the lead screw nut, and the lead screw nut is matched with the ballscrew and located below the square shaft bearing;
• the ballscrew is connected with the servo motor through the servo motor coupling, and the servo motor is fixed to the bottom plate);
• the transverse load transmission part comprises a spindle motor, a spindle motor output shaft flange, a square shaft flange, a square shaft, a first square shaft bushing, a crankshaft bearing, an eccentric rocker, a rocker connecting pin, a rocker connecting block, a U-shaped connecting rod, a first straight bearing, an elastic rod, a force sensor , a second straight bearing, a tensile plate and a bottom plate;
• the spindle motor is fixed to the bottom plate;
• an output shaft of the spindle motor is connected with the square shaft through the spindle motor output shaft flange and the square shaft flange;
• the square shaft drives the crankshaft bearing through the first square shaft bushing to rotate;
• the crankshaft bearing transmits the motion to the eccentric rocker, and the eccentric rocker is connected with the rocker connecting block through the rocker connecting pin;
• the U-shaped connecting rod is fixed to the rocker connecting block, and penetrates through the first straight bearing to connect with the elastic rod;
• the elastic rod is connected with the force sensor;
• and a horizontal load is transmitted to the tensile plate through the second straight bearing.