Free-mass and interface configurations of hammering mechanisms

摘要

The design of the free-mass in an ultrasonic driller/corer (USDC) has been refined in order to improve the performance and operational reliability of the system. In one embodiment, the improvements in performance and operational reliability include decreasing the impact surface area of the free-mass to increase the transfer of impact energy from the piezoelectric transducer and reductions in the likelihood that the system will jam.

主权项

1. A free-mass,
said free-mass having a geometry configured to receive momentum from a horn portion of an ultrasonic percussive device when present in said ultrasonic percussive device and to transmit momentum to a bit portion of said ultrasonic percussive device when present in said ultrasonic percussive device without exceeding stress and material deformation parameters of said bit portion, said free-mass or said horn portion, said free-mass having a geometry comprising at least one of a rounded profile and a chamfer configured to reduce jamming of said free-mass when present in said ultrasonic percussive device as it moves from a position of contact with one of said horn portion and said bit portion to a position of contact with the other of said horn portion and said bit portion.