Yarn clamping device for yarn winder

The utility model discloses a yarn clamping device for a yarn winder, which relates to the technical field of yarn winders and comprises a bearing plate, a motor interface is rotatably mounted in the center of the upper surface of the bearing plate, and an outer sleeve wall is welded on the outer ring of the upper surface of the bearing plate. A vertically-upward barrel placing rod is fixedly installed at the center point position of the upper surface of the motor connector, inner lining plates are symmetrically distributed in the outer sleeve wall, threaded ejector rods are arranged at the center point positions of the inner lining plates, and horizontally-distributed supporting guide rods are fixedly installed at the outer wall positions of the inner lining plates and symmetrically distributed along the threaded ejector rods. In the using process, normal rotation of the bobbin cannot be interfered, at the moment when the rotation stops, the bobbin which completes yarn winding can be completely clamped, a th