Modular fluid actuator system

A modular fluid actuator system provided for generating a relative motion between a first fluid transfer chamber of a first module unit and a piston rod arrangement in an axial direction, the modular fluid actuator system comprises:

• a fluid supply;
• a valve device coupled to the fluid supply and to the first fluid transfer chamber;
• a control unit coupled to the valve device for controlling the relative motion between the first fluid transfer chamber and the piston rod arrangement;
• the first fluid transfer chamber is coupled to a first sleeve portion of the first module unit exhibiting a first expandable hollow space which is coupled to and arranged for fluid communication with the valve device via the first fluid transfer chamber;
• the first expandable hollow space is arranged to provide a clamping action of the first sleeve portion to the piston rod arrangement when the first expandable hollow space is pressurized by means of said fluid communications;
• an expandable wall portion of the first sleeve portion is arranged adjacent around and coaxial with the piston rod arrangement;
• a second module unit comprising a second sleeve portion dividing an interior of a first cylinder housing of the second module unit into a first and second cylinder chamber, wherein a second expandable hollow space of the second sleeve portion is arranged for fluid communication with the fluid supply via a second fluid transfer chamber coupled to the second expandable hollow space and positioned exterior of said first cylinder housing;
• an expandable wall portion of the second sleeve portion is arranged adjacent around and coaxial with the piston rod arrangement;
• the first fluid transfer chamber comprises a first external fluid inlet port and the second fluid transfer chamber comprises a second external fluid inlet port;
• the first external fluid inlet port is coupled to the fluid supply via the valve device which in turn is coupled to the control unit for controlling and providing a static clamping functionality in a first mode for operation of the system;
• and
• the first module unit is configured to act as a brake module unit of the modular fluid actuator system,
• wherein the second external fluid inlet port is coupled to the fluid supply via a first separate valve element which in turn is coupled to the control unit for controlling and providing a stepwise dynamic clamping functionality in a second mode for operation of the system.