Tool holder with controlled tool movement
AssigneeRegie Nationale des Usines Renault
InventorAndre Ballini
Life of this patent
Estimating the term…
Abstract
Tool holder with controlled tool movement, comprising two members adapted to be moved angularly away from each other against a resilient force, one member carrying the tool and being movable away from the other, a push member adapted to control this movement extending through one of said members, at least one lever being interposed between said push member in order to scale the control action between said push member and said tool holder, said lever being housed longitudinally within the central passage of a tubular bore machining bar. The machining bar in conjunction with a corresponding tool-bit constitute the aforesaid members that are movable away from each other.
Claims8
A bore machining bar comprising an internal channel and at least one externally facing cavity, a tool bit mounted in said cavity so as to be movable radially away from said bar, a passage provided between said cavity and said channel, a tool adjustment device comprising first bearing means movably disposed in said channel to coact with said tool bit through said passage, and second bearing means secured within said channel in a radially opposed and axially offset position relative to said first bearing means, a scaling lever extending longitudinally in said channel and having one of its ends engaging said first and second bearing means, means for adjusting the position of the other end of said scaling lever in a direction transverse to said channel and substantially in a radial plane passing through said first and second bearing means, said adjusting means comprising a control screw penetrating radially into said channel and being held against axial movement in the bar, a nut cooperating with said screw, and intermediate means disposed in said channel cooperating with the other end of said scaling lever and said nut, the rotation of said screw causing displacement of said intermediate means, said displacement of said intermediate means causing the scaling lever to pivot on said second bearing and bear against the first bearing to obtain tool bit adjustment.
A bore machining bar comprising an internal channel and a plurality of externally facing cavities, a tool bit mounted in each cavity so as to be movable radially away from said bar, a passage provided between each cavity and said channel, a plurality of tool adjustment devices each comprising first bearing means movably disposed in said channel to coact with one said tool bit through one said passage, and second bearing means secured within said channel in a radially opposed and axially offset position relative to said first bearing means, a scaling lever extending longitudinally in said channel and having one of its ends engaging said first and second bearing means, means for adjusting the position of the other end of said scaling lever in a direction transverse to said channel and substantially in a radial plane passing through said first and second bearing means, said adjusting means comprising a control screw penetrating radially into said channel and being held against axial movement in the bar, a nut cooperating with said screw, and intermediate means disposed in said channel cooperating with the other end of said scaling lever and said nut, the rotation of said screw causing displacement of said intermediate means, said displacement of said intermediate means causing the scaling lever to pivot on said second bearing and bear against the first bearing to obtain tool bit adjustment.
Dependencies are inferred from the claim text.