Turntable assembly and engineering mechanical equipment

A turntable assembly for an engineering mechanical equipment, the turntable assembly comprising:

• a turntable body;
• a first rotating mechanism connected to the turntable body and configured to cause the turntable body to rotate relative to an undercarriage of the engineering mechanical equipment;
• and
• a second rotating mechanism connected to the turntable body and configured to cause an upper work device of the engineering mechanical equipment to rotate relative to the turntable body;
• a first fixing plate located on a top plate of the turntable body and fixed relative to the turntable body;
• a second fixing plate located on an upper side of the first fixing plate and fixed relative to the turntable body;
• and
• a pressing mechanism arranged on the turntable body and configured to press a rotating body against a surface of the first fixing plate so that the rotating body remains in surface contact with the first fixing plate when rotating relative to the first fixing plate,
• wherein an axis of rotation of the first rotating mechanism is not co-linear with an axis of rotation of the second rotating mechanism;
• wherein the second rotating mechanism comprises the rotating body for connecting the upper work device;
• and wherein at least two hinge points arranged spaced apart along the axis of rotation of the second rotating mechanism are provided between the rotating body and the turntable body;
• the rotating body is connected to the first fixing plate and the second fixing plate respectively by means of hinge shafts, and wherein the rotating body is in surface contact with the first fixing plate;
• and
• wherein one of:
• (i) the second rotating mechanism further comprises a rotating pin shaft, which is fixedly connected to the rotating body by means of a locking pin, so that the rotating body is caused to rotate by rotation of the rotating pin shaft, and wherein the pressing mechanism comprises:
• a plurality of pressing pin shafts connected to the rotating pin shaft;
• and a plurality of pressing oil cylinders located on a side of the top plate of the turntable body away from the rotating body and respectively connected to the plurality of pressing pin shafts, and configured to respectively cause the plurality of pressing pin shafts to move by movement of piston rods, so that the rotating pin shaft applies an acting force toward the first fixing plate on the rotating body, through the locking pin;
• and
• (ii) the rotating body comprises a rotating seat, which has a bottom in surface contact with the first fixing plate, and a bottom of the rotating seat has a circumferential flange, wherein the pressing mechanism comprises:
• an oil cylinder mounting bracket arranged on the top plate of the turntable body;
• and a plurality of pressing oil cylinders mounted on the oil cylinder mounting bracket and configured to press the circumferential flange downward by movement of piston rods.