Pulling device for a clamping device and clamping device equipped therewith

A pulling device for generating a pulling movement in a clamping device, comprising:

• a pull-acting hydraulic working cylinder having a pull piston displaceable along a longitudinal axis;
• a pull rod connected to the pull piston;
• a push-acting hydraulic pump cylinder having a pump piston displaceable therein;
• and
• a fluidic connection between the pump cylinder and the working cylinder so that a hydraulic fluid is interchangeable between the pump cylinder and the working cylinder,
• wherein a movement of the pump piston in a pushing direction along the longitudinal axis causes the hydraulic fluid to flow from the pump cylinder into the working cylinder and there causes a pulling movement of the pull piston and the pull rod connected thereto in a pulling direction along the longitudinal axis, the pulling direction being opposite to the pushing direction, and
• wherein the pump cylinder and the working cylinder are arranged coaxially to each other in a housing of the pulling device.