Articulated assembly, mechanical joint and robot

An articulated assembly, comprising a plurality of structural members, wherein the plurality of structural members comprise a first structural member, a second structural member, and a third structural member,

• the articulated assembly further comprises a plurality of bearings, the plurality of bearings comprise a first bearing and a second bearing, an outer ring of the first bearing is matched with a bearing housing of the first structural member, and an outer ring of the second bearing is matched with a bearing housing of the second structural member,
• the first bearing and the second bearing are coaxially arranged and arranged along an axial direction of the first bearing, along the axial direction, the bearing housing of the second structural member is located between the bearing housing of the first structural member and the third structural member,
• the articulated assembly further comprises a first receiving ring and a second receiving ring, along the axial direction, the first receiving ring is located between the first bearing and the second bearing, and two end surfaces of the first receiving ring are respectively in abutment with an inner ring of the first bearing and an inner ring of the second bearing;
• along the axial direction, the second receiving ring is located between the second bearing and the third structural member, and two end surfaces of the second receiving ring are respectively in abutment with the inner ring of the second bearing and the third structural member,
• the articulated assembly further comprises a fastening assembly, along the axial direction, the fastening assembly fastens the inner ring of the first bearing, the first receiving ring, the inner ring of the second bearing, the second receiving ring, and the third structural member together.