Front head nut pocket configuration for hydraulic hammer

摘要

A hydraulic hammer may include a power cell adapted to reciprocally drive a piston along an axis. The piston may, in turn, drive a hammer tool having a first end juxtaposed against the piston for accommodating cyclic impacts by the piston. While the first end of the hammer tool may be contained within a housing, the other end may extend from the housing for impacting rock, for example. The power cell and housing are axially secured together by a plurality of tie rods and nuts secured to ends of the tie rods, and the housing may include exterior pockets for accommodating the nuts. Each nut may have a circular exterior surface, and each nut pocket may have a generally elliptical interior surface, such that the exterior surface of each nut may be configured to engage at least two spaced apart areas of a corresponding interior surface of each nut pocket.

主权项

1. A fluid powered hammer assembly, comprising:
a power cell, a piston configured for reciprocal movement along an axis by the power cell, a hammer tool having a first end juxtaposed against the piston for accommodating cyclic impacts by the piston, the first end being contained within a housing and a second end extending from the housing, the power cell and the housing being axially secured together by a plurality of tie rods and tie rod nuts secured to ends of the tie rods; the housing having exterior nut pockets, and the nuts being contained within the nut pockets; wherein an exterior body portion of each tie rod nut is circular, defining a fixed radius; wherein each nut pocket is defined by a circumferentially extending interior wall sized to receive one tie rod nut, the interior wall defining variable radii; and wherein the exterior body portion of each tie rod nut is configured to engage the interior wall of one corresponding nut pocket in at least two spaced apart areas of the nut pocket.