Structure for positively feeding tools such as drills and the like

Abstract

Abstract A DRIVE MOTOR IS FORWARDLY CONNECTED TO A SPINDLE AND A LEAD SCREW, ALL GENERALY AXIALLY ALIGNED AND MOVABLE IN A HOUSING AS A UNIT FORWARDLY IN A FAST FEED STROKE PART, THEN FORWARDLY IN A POSITIVE FEED FEED STROKE PART AND THEN REARWARDLY IN A FAST RETRACTION STROKE. DURING THE FEED STROKE, THE UNIT IS URGED FORWARDLY BU A FIRST FLUID CYLINDER FORMED BY A PART OF THE HOUSING SURROUNDING THE DRIVE MOTOR AND A REARWARD PART OF THE DRIVE MOTOR WITH LEAD SCREW NUTS ACTIONABLE WITH THE LEAD SCREW TO OVERPOWER THE FIRST FLUID CYLINDER AND CONTROL THE UNIT MOVEMENT DURING THE POSITIVE FEED FEED STROKE PART. A SECOND FLUID CYLINDER FORMED BY A PART OF THE HOUSING SURROUNDING THE SPINDLE AND A PISTON PLATE SURROUNDING THE SPINDLE MOVES THE UNIT REARWARDLY IN THE REACTION STROKE. THE DRIVE MOTOR IS A FLUID MOTOR AND RECEIVES DRIVE FLUID DIRECTLY INTERNALLY OF THE FIRST FLUID CYLINDER. SELECTIVELY ACTIONABLE STOP MEANS STOPS THE UNIT MOVEMENT AT ANY POINT DURING SAID STROKES, AND SELECTIVELY ACTIONABLE RETURN MEANS ATUOMATICALLY SHIFTS THE UNIT MOVEMENT TO THE REARWARD RETRACTION STROKE AT ANY TIME DURING THE FORWARD FEED STROKE.

Inventors

• 👤 Robert C Quackenbush

Bibliographic Details