Abstract:
Tool-holding device suitable for being coupled to a mandrel of a machine tool or a mandrel fitted on a robot, comprising: - one or more tool-holder carriages (10); such carriages are positioned radially in relation to the mandrel axis (X) and are able to support a respective attachment group of a tool; - a carriage-holder head (30) on which the three carriages are housed and comprising a command actuator (32) for each carriage; each command actuator (32) is operatively connected to a respective carriage (10) and can be fed by a feed device to move said carriage radially between a rearward position and a forward position; - a connection body (50, 500) which can be coupled to the mandrel of the machine tool and provided with distribution means to draw said feed device to the command actuators (32), wherein the translation axis of each carriage (10) coincides substantially with the main axis of the respective command actuator (32) in the radial direction.
Abstract:
A valve unit (1,100) for controlling the fluid supply of an actuator (2) of a mobile device (3) comprises a unit body (10), at least two valve seats (12) with an axial extension made in said unit body, and at least two valves (14a, b) housed in the respective valve seats. Each valve comprises a valve obturator (16) axially mobile in its respective seat between a rearward position, wherein it prevents the transit of fluid towards a respective actuation chamber or from at least one actua- tion chamber to a discharge duct, and a forward position wherein it permit said passage of fluid. Said obturator has a proximal end (12') engageable by a presser organ (210) of a fluid supply unit (200).