Tensioning adjusting mechanism for drum

A tensioning adjusting mechanism for a drum, comprising a front plate, a rear plate, a base, a drum, a supporting seat, a motor frame, a motor, a tension spring and a synchronous belt;

• wherein the base is connected between a bottom of the front plate and a bottom of the rear plate;
• the drum is rotatably connected between the front plate and the rear plate and located above the base;
• the supporting seat is disposed on the base, the motor is disposed on the motor frame, and a drive shaft of the motor is connected with a synchronous belt wheel;
• the synchronous belt is tensioned and connected on the synchronous belt wheel and a peripheral wall of the drum and a transmission connection between the motor and the drum is realized by the synchronous belt;
• a first end of the motor frame is rotatably connected on the supporting seat;
• an adjusting rod is connected movably between the front plate and the rear plate and located below the motor frame;
• a first locking portion for after-adjustment fixing is disposed between a first end of the adjusting rod and the front plate, and a second locking portion for after-adjustment fixing is disposed between a second end of the adjusting rod and the rear plate;
• and
• a first end of the tension spring is connected to the adjusting rod, and a second end of the tension spring is connected to a second end of the motor frame, and a pull force of the tension spring is adjusted by controlling a position of the adjusting rod to make the tension spring be tensioned between the adjusting rod and the motor frame.