Patent ID: 6532861
Filing Date: 2003-03-18
Classification: B23Q

Abstract:
A clamping device for securing a draw-in bolt (12) on a machine table or a baseplate, having a piston (6) that is arranged movably in a cylinder bore (4) to form a pressure chamber (5), a cover (9) that closes off the cylinder bore (4) on the side opposite the pressure chamber (5), a receptacle (11) which is configured in the piston (6) and/or the cover (9) and into which a draw-in bolt (12) is insertable, and a clamping mechanism in order to secure a draw-in bolt (12) in the receptacle (11), the clamping mechanism being actuated by displacement of the piston (6) between a clamped position into which it is pushed by spring elements (10) that are arranged in a spring chamber (2) provided between the piston (6) and cover (9), and a released position into which it is brought by impingement of a hydraulic medium on the pressure chamber (5), characterized in that the spring chamber (2) is connected to the receptacle (11) by at least one runoff duct (19) through which a fluid that collects in the spring chamber (2) runs off into the receptacle (11) and that an end of the runoff duct (19) at the spring chamber lies higher up than an end of the runoff duct (19) at the receptacle.