Power-operated chuck
AssigneeSMW-Autoblok Spannsysteme GmbH
InventorsWalter Bronzino, Pier Mauro Bronzino
Life of this patent
Estimating the term…
Abstract
In a power-operated chuck (1) with radially adjustable clamping jaws (5) that are attached so as to swivel and be axially adjustable on an articulation lever arranged in a chuck body (2), each of the articulation levers (10) is pivotably mounted on an articulation pin (21) that passes through the articulation levers (10) and the articulation pins (21) are supported in the chuck body (2) so as to prevent rotation and are guided to permit limited axial movement. This embodiment makes it possible not only to carry out precise clampings of workpieces (W) over a long period with a consistently high level of rigidity, but also to avoid wear to a large extent. As a result, workpieces can always be clamped precisely whilst a high level of repeat accuracy is provided.
Claims10
A power-operated chuck (1) having at least two radially adjustable clamping jaws (5), each of which is attached to an articulation lever (10) that is axially adjustable against a force of a spring (12) and which is mounted in a chuck body (2) and can swivel, the articulation levers (10) being actuatable by driving jaws (8) acting on ends of the articulation levers (10) opposite to the clamping jaws (5), with the driving jaws (8) being acted upon by a piston (6) by means of inclined surfaces (7 or 9), the chuck body (2) having a contact surface for the workpiece (W) to be clamped, wherein each of the articulation levers (10) is mounted in a swiveling arrangement on articulation pins (21) that pass therethrough, the articulation pins (21) being supported in the chuck body (2) non-rotatably and guided to permit limited axial movement, and each of the articulation pins (21) that passes through the articulation levers (10) is provided with a centrally arranged cylindrical bearing surface (22) for engagement with the articulation levers (10), and contact surfaces (23, 24 or 25, 26) in end areas provide support without rotation in the lever (10) and limit the axial travel, wherein the contact surfaces (23, 24 or 25, 26) act in conjunction with counter surfaces (27, 28 or 29, 30) provided on the chuck body (2).
Dependencies are inferred from the claim text.