Method of simultaneously tensioning multiple jackbolts of a multi-jackbolt tensioner and handheld apparatus for performing same

摘要

A driving apparatus is used for simultaneously tensioning the jackbolts of a multi-jackbolt tensioner and includes a central drive gear mounted for rotation along a central drive gear axis. An annular array of spindles surrounds the central drive gear, each spindle independently mounted for rotation, with one spindle associated with one of the jackbolts. A socket on one spindle end is configured to receive one of the jackbolts. A spindle gear surrounds each spindle and is configured to rotate the spindle. The spindle gear is meshed with the central drive gear to be rotated by the central drive gear, wherein at least one spindle gear is offset along the central drive gear axis from at least another spindle gear. A slip clutch is positioned radially between each spindle gear and the associated spindle, wherein rotation of the jackbolts is up to a torque setting of the slip clutch during tensioning.

主权项

1. A method of simultaneously tensioning multiple jackbolts of a multi-jackbolt tensioner comprising the steps of:
A. Providing a multiple jackbolt driving apparatus including a central drive gear mounted for rotation along a central drive gear axis, an annular array of spindles surrounding the central drive gear, each spindle independently mounted for rotation, with one spindle associated with one of the jackbolts, a socket on one end of each spindle configured to receive one of the series of jackbolts; a spindle gear surrounding each spindle configured to rotate the spindle, the spindle gear meshed with the central drive gear to be rotated by the central drive gear, wherein at least one spindle gear is offset along the central drive gear axis from at least another spindle gear; and a slip clutch positioned radially between each spindle gear and the associated spindle, wherein rotation of the jackbolts is up to a torque setting of the slip clutch; B. Coupling the central drive gear to a source of rotating power for rotating the central drive gear; C. Coupling the multiple jackbolt driving apparatus with the multi-jackbolt tensioner, wherein each jackbolt of the multi jackbolt tensioner is engaged in one socket of the multiple jackbolt driving apparatus; and D. Operating the power source to rotate the central drive gear and simultaneously rotating the jackbolts of the multi jackbolt tensioner.