Helmet adapter for pile drivers

摘要

An adapter assembly for transmitting a drive force from a pile driving system defining a drive axis to a pile defining a pile axis comprising a base assembly and an adapter assembly. The base assembly is operatively supported such that the drive force is transmitted to the base assembly. The adapter assembly comprises a plate member, a skirt member defining a skirt chamber, and an adapter connector configured to support the skirt member relative to the base assembly, the plate member, and the pile member. The adapter assembly substantially aligns the drive axis with the pile axis. The drive force is transmitted from the base assembly to the plate member. The pile is received within the skirt chamber such that the drive force is transmitted from the plate member to the pile. The skirt member is substantially isolated from the drive force.

主权项

1. A combination of:
a pile defining a pile axis; a hammer for applying a drive force to a drive member along a drive axis; a base portion operatively supported relative to the drive member such that the drive force is transmitted to the base portion; and an adapter assembly comprising
a plate member defining a center portion and a skirt adapter portion defining at least one alignment surface,a skirt member defining a skirt chamber, a pile opening, and a plate opening, where the skirt adapter portion of the plate member extends through the plate opening and at least partly into the skirt chamber and such that the at least one alignment surface engages the skirt member such that
the skirt member may move relative to the plate member along the drive axis, andthe skirt member is substantially aligned with the drive axis, whereinthe skirt chamber is sized and dimensioned to receive an upper portion of the pile, andan adapter connector that suspends the skirt member from the plate member such that a gap is maintained between the skirt member and the center portion of the plate member during operation of the pile driving system; whereby an upper portion of the pile is inserted through the pile opening and into the skirt chamber such that
the skirt member engages the upper portion of the pile to align the drive axis with the pile axis;the drive force is transmitted along the drive axis from the base portion to the upper portion of the pile through the plate member; andthe gap between the skirt member and the center portion of the plate member allows movement of the skirt member relative to the plate member along the drive axis such that the skirt member is substantially isolated from the drive force.